WO2023077380A1 - 快门机构、曝光单元、镜头及影像设备 - Google Patents

快门机构、曝光单元、镜头及影像设备 Download PDF

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Publication number
WO2023077380A1
WO2023077380A1 PCT/CN2021/128792 CN2021128792W WO2023077380A1 WO 2023077380 A1 WO2023077380 A1 WO 2023077380A1 CN 2021128792 W CN2021128792 W CN 2021128792W WO 2023077380 A1 WO2023077380 A1 WO 2023077380A1
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WO
WIPO (PCT)
Prior art keywords
blade
cover plate
light
shutter mechanism
transmission member
Prior art date
Application number
PCT/CN2021/128792
Other languages
English (en)
French (fr)
Inventor
夏龙光
王平
徐永旺
Original Assignee
深圳市大疆创新科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市大疆创新科技有限公司 filed Critical 深圳市大疆创新科技有限公司
Priority to PCT/CN2021/128792 priority Critical patent/WO2023077380A1/zh
Publication of WO2023077380A1 publication Critical patent/WO2023077380A1/zh

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/14—Two separate members moving in opposite directions
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/16—Two separate members moving in the same direction

Definitions

  • the present application relates to the technical field of photography, in particular to a shutter mechanism, an exposure unit, a lens and an imaging device.
  • the shutter mechanism of the imaging equipment is very important for controlling the exposure time of the photosensitive components of the imaging equipment.
  • the main indicators to evaluate the performance of a shutter include shutter speed, shutter diameter, shutter life, stability, volume, etc.
  • shutter speed When the shutter is closed, due to the high-speed collision, the shutter blades are very likely to rebound and expose the light. How to reduce the exposure caused by the rebound of the blades when the shutter is closed has always been a long-standing problem in the design of the shutter mechanism of the shooting device.
  • Embodiments of the present application provide a shutter mechanism, an exposure unit, a lens, and an imaging device.
  • the shutter mechanism in the embodiment of the present application includes a cover plate, a first stopper and a second stopper, a power assembly, and a first blade and a second blade.
  • the cover plate is provided with a light passing hole.
  • the power assembly can drive the first vane and the second vane to move on the cover plate to block the light passing hole, and the first stopper and the second stopper are used to respectively The moving strokes of the first blade and the second blade when moving to cover the light passing hole are limited.
  • the power assembly drives the first blade and the second blade to move on the cover plate to block the light aperture, the time when the first blade collides with the first limiting member It is different from the time when the second blade collides with the second limiting member.
  • Embodiments of the present application also provide another shutter mechanism.
  • the shutter mechanism includes a cover plate, a first limiting member, a power assembly, and a first blade.
  • the cover plate is provided with a light passing hole, and the cover plate is provided with a limiting portion.
  • the power assembly includes an actuator and a transmission member.
  • the actuator can drive the first blade to move on the cover plate through the transmission member to block the light aperture, and the first stopper is used to limit the movement of the first blade to The moving stroke of the light passing hole is blocked, and the limit part is used to limit the moving stroke of the transmission member when the actuator drives the first blade to move to block the light passing hole.
  • the time when the first blade collides with the first limiting member is earlier than the The collision time between the transmission member and the limiting part.
  • An exposure unit includes the shutter mechanism and the diaphragm mechanism of the above-mentioned embodiments.
  • the shutter mechanism is combined with the aperture mechanism.
  • the lens in the embodiment of the present application includes a casing, a lens module and an exposure unit.
  • the lens module and the exposure unit are accommodated in the casing.
  • the exposure unit includes the shutter mechanism and the aperture mechanism of the above-mentioned embodiment.
  • the shutter mechanism is combined with the aperture mechanism.
  • the imaging device implemented in this application includes a device body and a lens.
  • the lens is mounted on the device body.
  • the lens includes a casing, a lens module and an exposure unit.
  • the lens module and the exposure unit are accommodated in the casing.
  • the exposure unit includes the shutter mechanism and the aperture mechanism of the above-mentioned embodiments.
  • the shutter mechanism is combined with the aperture mechanism.
  • the shutter mechanism, the exposure unit, the lens, and the imaging device in the embodiments of the present application can ensure that there is no light exposure after the shutter mechanism is closed, so as to improve the final imaging effect of the imaging device.
  • FIG. 1 is a perspective schematic diagram of an imaging device in some embodiments of the present application.
  • FIG. 2 is a schematic cross-sectional view of a lens in some embodiments of the present application.
  • FIG. 3 is a perspective exploded view of an exposure unit in some embodiments of the present application.
  • Fig. 4 is a partial perspective view of a shutter mechanism in some embodiments of the present application.
  • FIG. 5 is a top view of a shutter mechanism in some embodiments of the present application.
  • Fig. 6 is a schematic diagram of the exposure phenomenon caused by the rebound of the blades of the shutter mechanism in some embodiments
  • FIG. 7 is a partial perspective view of a shutter mechanism in some embodiments of the present application.
  • FIG. 8 is a top view of a shutter mechanism in some embodiments of the present application.
  • Fig. 9 is a schematic diagram of the relationship between the exposure degree and time of the light apertures of the first blade and the second blade according to some embodiments of the present application.
  • Fig. 10 is a schematic diagram of a scene in which the first blade and the second blade respectively block the light aperture in some embodiments of the present application;
  • Fig. 11 is a schematic diagram of a scene where the first blade and the second blade jointly block the light aperture in some embodiments of the present application;
  • Fig. 12 is a schematic diagram of the moving scene of the first blade, the second blade, and the transmission member in some embodiments of the present application;
  • Fig. 13 is a schematic diagram of a scene where the first blade and the second blade jointly block the light aperture in some embodiments of the present application;
  • Fig. 14 is a perspective exploded view of an exposure unit according to some embodiments of the present application.
  • orientation or positional relationship indicated by the terms “thickness”, “upper”, “top”, “bottom”, “inner”, “outer”, etc.
  • the orientation or positional relationship is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the application .
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • features defined as “first” and “second” may explicitly or implicitly include one or more features.
  • “plurality” means two or more, unless otherwise specifically defined.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation.
  • an embodiment of the present application provides an imaging device 1000 .
  • the imaging device 1000 includes a device body 500 and a lens 300 , and the lens 300 is installed on the device body 500 .
  • the device body 500 is provided with photosensitive components (not shown).
  • the photosensitive element can receive the light (optical signal) entering the device body 500 from the lens 300 and generate an electrical signal according to the received light.
  • the photosensitive component is an image sensor, and the image sensor can generate an image according to the light entering the device body 500 from the lens 300 .
  • the imaging device 1000 may be a photographing device with a photographing function, such as a mobile phone, a camera, a tablet computer, a video camera, a smart watch, and other photographing devices, which are not limited herein.
  • a photographing device with a photographing function such as a mobile phone, a camera, a tablet computer, a video camera, a smart watch, and other photographing devices, which are not limited herein.
  • the embodiment of the present application further provides a lens 300 .
  • the lens 300 includes a casing 310 , a lens module 320 , and an exposure unit 100 .
  • the lens module 320 and the exposure unit 100 are accommodated in the casing 310 .
  • the lens module 320 may be a combination of multiple lenses, or a single lens, which is not limited here.
  • the light entering the lens passes through the lens module 320 and enters the exposure unit 100.
  • the exposure unit 100 can perform exposure processing on the light from the lens module 320, such as controlling the exposure time and/or controlling the exposure amount.
  • the lens 300 can be applied to the imaging device 1000 in the embodiment of the present application, for example, to the imaging device 1000 shown in FIG. 1 .
  • the embodiment of the present application also provides an exposure unit 100 .
  • the exposure unit 100 includes an aperture mechanism 30 and a shutter mechanism 10 .
  • the shutter mechanism 10 is combined with an aperture mechanism 30 .
  • the exposure unit 100 can be applied to the lens 300 in the embodiment of the present application, such as the lens 300 shown in FIG.
  • the embodiment of the present application further provides a shutter mechanism 10 .
  • the shutter mechanism 10 includes a cover plate 11 , a first limiting member 151 , a second limiting member 152 , a power assembly 13 , a first blade 121 and a second blade 122 .
  • the shutter mechanism 10 can be applied to the exposure unit 100 in the embodiment of the present application, for example, to the exposure unit 100 shown in FIG. 3 .
  • the cover plate 11 is provided with an optical hole 111 , through which the light received by the lens 300 can enter the device body 500 , for example, enter the photosensitive components of the device body 500 .
  • the power assembly 13 can drive the first vane 121 and the second vane 122 to move on the cover plate 11 to block the optical hole 111, and the first stopper 151 and the second stopper 152 are used to limit the first vane 121 and the second stopper 121 respectively.
  • the two blades 122 are moving to cover the moving stroke of the optical hole 111 .
  • the shutter mechanism 10 is in a “shutter fully open” state, and at this time, neither the first blade 121 nor the second blade 122 blocks the optical hole 111 .
  • the power assembly 13 can drive the first blade 121 to move counterclockwise so that the first blade 121 blocks the optical hole 111 , and can drive the second blade 122 to move clockwise so that the second blade 122 blocks the optical hole 111 .
  • the first limiting member 151 can limit the movement stroke of the first blade 121 in the counterclockwise direction (the stroke of the closing process).
  • the second limiting member 152 can limit the movement stroke of the second blade 122 in the clockwise direction (the stroke of the closing process).
  • FIG. 6 illustrates the process of blades bouncing back to expose light, wherein the horizontal axis is the time axis, and the vertical axis represents the amount of light entering. After the blades are closed, the amount of incoming light gradually decreases from 100% to 0%, and then the blades bounce back to expose the light.
  • the incoming light increases from 0% to 10%, resulting in the exposure of the light hole.
  • the blade continues to move to the end of the stroke under the drive of the actuator, and the amount of light entering is reduced to 0% again. Since the blade has already bounced and bounced, the speed of the blade decreases, so the degree of rebound when the blade collides with the limiter again decreases, and the blade bounces again, causing the amount of incoming light to increase from 0% to 3% within the time period ⁇ T2, resulting in The aperture is exposed again. Then the blade continues to move to the end of the stroke under the drive of the actuator 133, and the light input is reduced to 0% again.
  • the power assembly 13 drives the first blade 121 and the second blade 122 to move on the cover plate 11 to block the During the process of the light hole 111 , the time when the first blade 121 collides with the first limiting member 151 is different from the time when the second blade 122 collides with the second limiting member 152 . In this way, the rebound time of the first blade 121 and the second blade 122 due to the collision is also different.
  • the part of the light passing hole 111 that cannot be blocked due to the rebound can be blocked by the other blade, thereby avoiding the light passing caused by the rebound of the blade.
  • the hole 111 is exposed to improve the final imaging effect of the imaging device 1000 .
  • the thickness range of the cover plate 11 is [0.18 mm, 0.22 mm].
  • the thickness of the cover plate 11 may be 0.18 mm, 0.19 mm, 0.20 mm, 0.21 mm, 0.22 mm or other thicknesses, which are not listed here.
  • the range of the thickness of the cover plate 11 is [0.18 mm, 0.22 mm], which can make the cover plate 11 have a certain strength and facilitate the combination of the cover plate 11 and other components.
  • the thickness of the cover plate 11 can be made as thin as possible while ensuring the strength of the cover plate 11 , so as to realize the miniaturization and thinning of the shutter mechanism 10 , and the axial thickness of the shutter mechanism along the optical axis direction can be reduced.
  • the first limiting member 151 and the second limiting member 152 extend from the surface of the cover plate 11 .
  • the first limiting member 151 and the second limiting member 152 extend from the surface of the base 31 of the aperture mechanism 30 , and the cover plate 11 is provided with a first limiting hole 118 and a second limiting hole 118 .
  • Limiting hole 119 When the shutter mechanism 10 is combined with the aperture mechanism 30, the first blade 121 and the second blade 122 are located between the cover plate 11 and the base 31, and the first limiting member 151 extends into the first limiting hole 118 to limit the second A moving stroke of the blade 121 ; the second limiting member 152 extends into the second limiting hole 119 to limit the moving stroke of the second blade 122 .
  • the power assembly 13 may include a transmission member 131 , a seat 132 , an actuator 133 and a cover 134 .
  • the actuator 133 is installed on the base body 132
  • the cover body 134 is installed on the base body 132
  • the actuator 133 is accommodated in the base body 132 and the cover body 134 .
  • the actuator 133 is a motor
  • the transmission member 131 is a connecting rod connected to the rotor of the motor, so that the transmission member 131 can move under the driving of the motor.
  • the first vane 121 is connected to the transmission member 131 , and the actuator 133 can drive the first vane 121 to move on the cover plate 11 through the transmission member 131 to block the optical hole 111 .
  • the second blade 122 is connected to the transmission member 131 , and the actuator 133 can drive the second blade 122 to move on the cover plate 11 through the transmission member 131 to cover the optical hole 111 .
  • the first blade 121 includes a first shielding portion 1211 and a first stop portion 1212 , the first blade 121 is provided with a first through hole 1213 , and the transmission member 131 passes through the first stopper portion 1212 .
  • a through hole 1213, the first shielding part 1211 is used to shield the light passing hole 111, the first stopper part 1212 extends from the side of the first shielding part 1211 close to the first stopper 151, and is used to connect the first blade 121 and the When the first limiting member 151 collides with the first limiting member 151 .
  • the second blade 122 includes a second shielding portion 1221 and a second stopper portion 1222, the second blade 122 is provided with a second through hole 1223, the transmission member 131 passes through the second through hole 1223, and the second shielding portion 1221 is used to shield the light passing hole 111, the second stopper 1222 extends from the side of the second shielding part 1221 close to the second limiter 152, and is used to collide with the second limiter 152 when the second blade 122 collides with the second limiter 152 conflict.
  • the shutter when the shutter is fully open, neither the first shielding portion 1211 of the first blade 121 nor the second shielding portion 1221 of the second blade 122 shields the optical hole 111 .
  • the transmission member 131 moves along the first direction Z, and the first blade 121 Driven by the transmission member 131, it moves counterclockwise, so that the first shielding portion 1211 gradually blocks the optical hole 111, and at the same time, the second blade 122 moves clockwise under the drive of the transmission member 131, so that the second shielding portion 1221 gradually Block the light hole 111 .
  • the first stop portion 1212 of the first blade 121 is in contact with the first limiter 151
  • the second stopper 1222 of the second blade 122 is in contact with the second limiter.
  • the first shielding portion 1211 of the first blade 121 and the second shielding portion 1221 of the second blade 122 shield the optical hole 111 together.
  • the time when the first blade 121 collides with the first limiting member 151 is earlier than the time when the second blade 122 collides with the second limiting member 152 .
  • the horizontal axis is the time axis
  • the vertical axis is the exposure degree of the light passing hole 111 only when a single blade (the first blade 121 or the second blade 122) blocks the light passing hole 111, that is, when it is blocked by the first blade 121 alone Exposure degree of the light through hole 111 under the condition that the light through hole 111 or the second vane 122 alone blocks the light through hole 111 .
  • the first vane 121 and the second vane 122 start to block the optical hole 111 driven by the power assembly 13 .
  • the power assembly 13 drives the first vane 121 and the second vane 122 to move on the cover plate 11 to block the optical hole 111
  • the first stopper 1212 moving in the counterclockwise direction first contacts the first Limiting member 151 and collide.
  • the first blade 121 is deformed to a certain extent due to the collision, and then recovers to deform and rebounds clockwise at time t4.
  • the transmission member 131 still moves along the first direction Z to drive the first blade 121 to move in the counterclockwise direction, so that after the first blade 121 rebounds in the clockwise direction for a certain distance, the transmission member 131 moves again. Driven by 131, it moves counterclockwise until the first stopper 1212 of the first vane 121 collides with the first stopper 151 again at time t5, and then the first stopper 1212 of the first vane 121 collides with the first stopper 151 again.
  • the positioning member 151 is attached so that the first shielding portion 1211 of the first blade 121 stays at a predetermined position in the closed state of the shutter to shield the optical hole 111 .
  • the second stop portion 1222 of the second blade 122 collides with the second limiter 152 at time t3, later than the first stopper 1212 of the first blade 121 collides with the first limiter 151 time t2.
  • the transmission member 131 connected to the first blade 121 and the second blade 122 connected to the transmission member 131 also decelerate, so that the decelerated second blade 122 is collided
  • the rebound degree of the first blade 121 is smaller than that of the first blade 121 when it collides.
  • the second blade 122 is deformed to a certain extent due to the collision, and then recovers the deformation and rebounds in the counterclockwise direction at the moment t6.
  • the rebounded second blade 122 continues to move clockwise under the drive of the transmission member 131, and at time t7, the second stop portion 1222 of the second blade 122 collides with the second limiter 152 again, and then the second blade 122
  • the second stop portion 1222 is in contact with the second limiting member 152 , so that the second blocking portion 1221 of the second blade 122 stays at a predetermined position in the closed state of the shutter to block the optical hole 111 .
  • the light passing hole 111 is completely blocked, so that the shutter mechanism 10 as a whole is not exposed to light. Moreover, after the time t2 , under the joint action of the first vane 121 and the second vane 122 , the optical hole 111 can still be completely blocked.
  • the rebound time periods of the second blade 122 and the first blade 121 are staggered, the second blade 122 can block the optical hole 111 during the time period during which the first blade 121 bounces, and the second blade 122 can block the optical hole 111 during the time period during which the second blade 122 rebounds
  • a blade 121 can cover the light passing hole 111 , so that the light passing hole 111 can always be covered by the blade when the shutter mechanism 10 is completely closed, thereby avoiding light exposure after the shutter mechanism 10 is completely closed.
  • the first shielding portion 1211 of the first blade 121 reaches the predetermined position in the closed state of the shutter, it is not necessary to completely shield the optical hole 111 , and the second shielding portion of the second blade 122 When the part 1221 reaches the predetermined position in the closed state of the shutter, it is not necessary to completely cover the light aperture 111. Please refer to FIG. 10 , in some implementations, when the first shielding portion 1211 of the first blade 121 reaches the predetermined position in the closed state of the shutter, it is not necessary to completely shield the optical hole 111 , and the second shielding portion of the second blade 122 When the part 1221 reaches the predetermined position in the closed state of the shutter, it is not necessary to completely cover the light aperture 111. Please refer to FIG.
  • the first shielding part 1211 and the second shielding part 1221 can jointly shield the optical hole 111, and when the first blade 121 rebounds, the second shielding part 1221 can Covering the part of the optical hole 111 that the first shielding part 1211 cannot shield; and the first shielding part 1211 can shield the part of the optical hole 111 that the second shielding part 1221 cannot shield when the second blade 122 rebounds, That is, the light passing hole 111 can be completely blocked in the closed state of the shutter, and the phenomenon of light exposure in the closed state of the shutter can be prevented.
  • the area S1 is the area of the light passing hole 111 that cannot be blocked when the first shielding part 1211 reaches the predetermined position in the closed state of the shutter
  • the area S2 is the area that cannot be blocked when the second shielding part 1221 reaches the predetermined position in the closed state of the shutter.
  • the area of the light passing hole 111 that is blocked, the area S3 is the area where the light-shielding holes outside the area S1 are exposed when the first blocking part 1211 rebounds to the maximum distance, and the area S4 is the light-shielding hole outside the area S2 when the second blocking part 1221 rebounds to the maximum distance exposed areas.
  • the first shielding part 1211 can shield the area S2 that the second shielding part 1221 cannot shield, and the second shielding part 1221 can shield the first shielding part 1221.
  • the second shielding part 1221 can shield the region S3 which the first shielding part 1211 cannot shield, and during the rebounding process of the second blade 122, the first shielding part 1211 can shield the first shielding part 1211 Area S4 that cannot be occluded.
  • this embodiment can use blades with a smaller area to shield the light passing holes 111, which can reduce the
  • the overall weight of the shutter mechanism 10 is beneficial to realize the thinning of the shutter mechanism 10 . As the area of the blade is reduced, the volume and mass of the blade are also reduced, so that the moment of inertia of the blade moving when the shutter is closed can be reduced, so that a faster shutter speed can be achieved to obtain better shutter performance; or a higher shutter speed can be used.
  • the output torque of the actuator 133 is low to save energy.
  • Fig. 10 to Fig. 13 only symbolically illustrate the position changes of the first blade 121, the second blade 122 and the transmission member 113 during the closing process of the shutter, not the first blade 121, the second blade 122 and the transmission member. 113 of the actual structure.
  • the actual structure and actual connection relationship of the first blade 121 , the second blade 122 and the transmission member 113 please refer to the structure and connection relationship shown in FIG. 4 , FIG. 5 , FIG. 7 , and FIG. 8 .
  • the sizes of the first stopper 1212 and the second stopper 1222 can be different, so that the time when the first blade 121 collides with the first limiter 151 is the same as the time when the second blade 122 collides with the second limiter.
  • the timing of the collision of piece 152 is different.
  • the first stopper 1212 is longer than the second stopper 1222, so that when the first vane 121 and the second vane 122 move under the drive of the same transmission member 131, the first stopper 1212 can first A collision occurs at the second stop portion 1222 .
  • the moving strokes of the first stopper 1212 and the second stopper 1222 are different, so that the time when the first blade 121 collides with the first limiter 151 is the same as the time when the second blade 122 collides with the second limiter.
  • the times at which bits 152 collide vary.
  • the first stroke of the first stopper 1212 moving from the fully open position shown in FIG. 5 to the shutter closed position shown in FIG. 8 is less than the second stroke.
  • the stopper 1222 moves from the position in the fully open state shown in FIG. 5 to the position in the shutter closed state shown in FIG. 8 by a second stroke.
  • the cover plate 11 is provided with a stopper 113, and the stopper 113 is used to limit the position of the actuator 133 when driving the first blade 121 and the second blade 122 to block the optical hole.
  • the limiting portion 113 and the transmission member 131 are made of plastic material, so that the limiting portion 113 and the transmission member 131 have a certain strength and can withstand multiple collisions.
  • the cover plate 11 is provided with a groove 112
  • the stopper 113 is the groove wall 1121 of the groove 112
  • the transmission member 131 extends into the groove 112 and can be positioned at the position of the actuator 133 . Driven to move in the groove 112.
  • the time when the first vane 121 collides with the first limiting member 151 is earlier than The time at which the transmission member 131 collides with the limiting portion 113 , and the time at which the transmission member 131 rebounds after colliding with the limiting portion 113 is earlier than the time at which the second blade 122 rebounds after colliding with the second limiting member 152 .
  • Fig. 12 illustrates the relationship between the first blade 121, the light passing hole 111 and the first limiting member 151, the relationship between the second blade 122 and the light passing hole 111 and the second limiting member during the process from the fully open state of the shutter to the closed state of the shutter.
  • the shutter is fully opened, and neither the first shielding portion 1211 of the first blade 121 nor the second shielding portion 1221 of the second blade 122 shields the optical hole 111 .
  • the first stop portion 1212 of the first blade 121 is in contact with the first limiting member 151, at this time the transmission member 131 has not moved to interfere with the limiting portion 113, and the second stopper portion of the second blade 122 1222 does not interfere with the second limiting member 152 .
  • the first blade 121 is deformed to a certain extent and gradually recovers, and rebounds at time t3 to reduce the kinetic energy (speed) of the transmission member 131 and the second blade 122.
  • the transmission member 131 does not move to interfere with the limiting part 113
  • the second stopping part 1222 of the second blade 122 does not interfere with the second limiting part 152 .
  • the transmission member 131 does not move to interfere with the limiting portion 113, the second stop portion 1222 of the second blade 122 does not interfere with the second limiting member 152, and the first blade 121 rebounds After turning clockwise to the maximum rebound position, driven by the transmission member 131 , it rotates counterclockwise again, and at time t4 again collides with the first limiting member 151 .
  • the second stopper 1222 collides with the second limiter 152, and the transmission member 131 collides with the limiter 113 and rebounds immediately, further reducing the kinetic energy (speed) of the transmission member 131 and the second blade 122 , at this time the first stop portion 1212 has already interfered with the first limiting member 151 .
  • the transmission member 131 rebounds to the maximum position, and is driven by the actuator 133 to move toward the limit portion 113 again, and the second blade 122 is deformed to a certain extent due to the collision and gradually recovers the deformation. But no rebound occurred because the recovery deformation was not completed.
  • the second blade 122 completes recovery deformation and rebounds.
  • the second blade 122 moves again until the second stop portion 1222 collides with the second limiter 152 , and at this time the transmission member 131 also conflicts with the limiter 113 .
  • the light passing hole 111 can be completely blocked by the first vane 121 and the second vane 122 without exposure to light, And after the time t2, it can always keep out of the light under the common covering of the first blade 121 and the second blade 122, thus solving the problem that after the first blade 121 and the second blade 122 of the shutter mechanism 10 reach the end position in the closed state of the shutter, Exposure problems due to rebound.
  • the limiting portion 113 is between the first limiting member 151 and the second limiting member 152, and the distance between the limiting portion 113 and the first limiting member 151 is less than the limit.
  • the distance between the position portion 113 and the second limiting member 152 is smaller than the first stroke of the second stopper 1222 when moving from the position in the fully open state to the shutter closed state.
  • the lower position is moved by the second stroke, so that the first stopper 1212 can collide with the second stopper 1222 before.
  • the first blade 121 can be caused to collide with the second blade 122 before the first blade 121 and the second blade 122 have the same size, so that the first blade 121 and the second blade 122 can be produced by the same process, There is no need to design the first vane 121 and the second vane 122 with different sizes, so as to reduce the production demand for the vane.
  • the first vane 121 and the second vane 122 have the same size.
  • the distance L1 from the first limiter 151 to the limiter 113 is smaller than the distance L2 from the second limiter 152 to the limiter 113 , so that the first stopper moves when the transmission member 131 comes into contact with the limiter 113
  • the time when the portion 1212 collides with the first limiting member 151 is earlier than the time when the second stop portion 1222 collides with the second limiting member 152 .
  • the first blade 121 and the second blade 122 have the same size
  • the first limiting member 151 and the second limiting member 152 are symmetrical about the axis OO1
  • the groove 112 on the cover plate 11 is an arc-shaped groove, and the arc-shaped groove 112 protrudes toward the first limiting member 151 . In this way, the same process can be used to produce the first blade 121 and the second blade 122 , and there is no need to design the first blade 121 and the second blade 122 with different sizes, so as to reduce the production demand for blades.
  • the first limiting member 151 and the second limiting member 152 are not disposed on the cover plate 11 , but are disposed on other devices.
  • the first limiting member 151 and the second limiting member 152 can be arranged on the aperture mechanism 30 of the exposure unit 100, and the cover plate 11 is installed on the aperture mechanism 30 such that the first limiting member 151 and the second limiting member The member 152 can respectively block the moving strokes of the first vane 121 and the second vane 122 on the cover plate 11 .
  • the first limiting member 151 and the second limiting member 152 can be symmetrically arranged on other devices, so as to reduce the production demand for devices provided with the first limiting member 151 and the second limiting member 152 .
  • the first stop portion 1212 of the first blade 121 can be Conflict with the first limiter 151, and when the transmission member 131 moves to the limiter 113 on the wall of the groove 112, the second stopper 1222 of the second blade 122 interferes with the second limiter 152, so that The first blade 121 collides before the second blade 122 .
  • both the transmission member 131 and the limiting portion 113 are made of plastic material, and rebound immediately after the transmission member 131 collides with the limiting portion 113; A certain degree of deformation occurs, and the second blade 122 rebounds after the deformation is restored, so that the time when the second blade 122 collides with the second limiter 152 is the same as the time when the transmission member 131 collides with the limiter 113, but the transmission member 131 can rebound before the second blade 122, so as to reduce the kinetic energy of the second blade 122 before the second blade 122 rebounds, so that the degree of rebound of the second blade 122 is reduced.
  • the cover plate 11 is provided with a first guide rail 115 and a second guide rail 116 .
  • the first blade 121 moves along the first guide rail 115 on the cover plate 11 , and the first guide rail 115 can limit the moving track of the first blade 121 so that the first blade 121 moves according to the track formed by the first guide rail 115 .
  • the second blade 122 moves on the cover plate 11 along the second guide rail 116 , and the second guide rail 116 can limit the moving trajectory of the second blade 122 so that the second blade 122 moves according to the trajectory formed by the second guide rail 116 .
  • the first blade 121 and the second blade 122 are stacked on the cover plate 11 , and the first guide rail 115 and the second guide rail 116 extend from the surface of the cover plate 11 .
  • the height that the first guide rail 115 extends relative to the surface of the cover plate 11 is different from the height that the second guide rail 116 extends relative to the surface of the cover plate 11, so that the first vane 121 and the second vane 122 move at different heights to avoid the second guide rail 116 moving at different heights.
  • a collision occurs between the first blade 121 and the second blade 122 .
  • the height of the first guide rail 115 is smaller than that of the second guide rail 116 , and the first blade 121 can move along the first track under the second blade 122 to avoid collision with the second blade 122 when moving. In another embodiment, the height of the first guide rail 115 is greater than that of the second guide rail 116 , and the first blade 121 can move along the first track above the second blade 122 to avoid collision with the second blade 122 when moving.
  • the shutter mechanism 10 further includes a light shielding plate 14, the light shielding plate 14 is located on the first side 115 of the cover plate 11, and the first blade 121 and the second blade 122 are accommodated in the cover plate 11 and the light shielding plate 11. between plates 14.
  • Light can enter the light hole 111 from the second side 117 of the cover plate 11 , and the light shielding plate 14 is used to block the light entering the first side 115 of the cover plate 11 .
  • the light shielding plate 14 is used to press the first blade 121 and the second blade 122 against the surface of the cover plate 11, so that the first blade 121 and the second blade 122 can be attached to the surface of the cover plate 11 movement (in some embodiments conforming to a track extending from the surface of the cover plate 11).
  • the value range of the thickness of the shading plate 14 is [40.0 ⁇ m, 60.0 ⁇ m], for example, the value of the thickness of the shading plate 14 can be 40.0 ⁇ m, 42.0 ⁇ m, 44.0 ⁇ m, 46.0 ⁇ m, 48.0 ⁇ m , 50.0 ⁇ m, 52.0 ⁇ m, 54.0 ⁇ m, 56.0 ⁇ m, 58.0 ⁇ m, 60 ⁇ m or other values, which are not listed here.
  • the value range of the thickness of the light shielding plate 14 is [40.0 ⁇ m, 60.0 ⁇ m], which can make the light shielding plate 14 have a certain strength, which is convenient to combine with other devices, and the thickness of the light shielding plate 14 is relatively thin, which is beneficial to realize the lightness and thinness of the shutter mechanism 10 change.
  • the light shielding plate 14 includes a light through hole 141 corresponding to the light through hole 111 .
  • Light entering the first side 115 of the cover plate 11 through the light hole 111 can enter other devices connected to the shutter mechanism 10 through the light hole 141 .
  • the shutter mechanism 10 is connected to the aperture mechanism 30 , and light entering the shutter mechanism 10 can enter the aperture mechanism 30 through the light hole 111 and the light hole 141 in sequence.
  • the first limiting member 151 and the second limiting member 152 extend from the surface of the light shielding plate 14 to limit the first blade 121 and the second blade between the light shielding plate 14 and the cover plate 11 122 travel strokes.
  • the exposure unit 100 provided by the embodiment of the present application includes a shutter mechanism 10 and an aperture mechanism 30 .
  • the shutter mechanism 10 may be the shutter mechanism 10 in any of the above-mentioned embodiments.
  • the value range of the thickness of the shutter mechanism 10 is [0.38mm, 0.42mm], for example, the value of the thickness of the shutter mechanism 10 can be 0.38mm, 0.39mm, 0.40mm, 0.41mm, 0.42mm or other values, which are not listed here.
  • the value range of the thickness of the exposure unit 100 is [2.50mm, 2.90mm].
  • the value of the thickness of the exposure unit 100 can be 2.50mm, 2.60mm, 2.70mm, 2.80mm, 2.90mm or other values, here Not to list them all.
  • the shutter mechanism 10 and the exposure unit 100 can have a thinner thickness with higher strength, so as to reduce the axial thickness of the exposure unit 100 along the optical axis direction, which is beneficial to realize the thinning of the exposure unit 100 .
  • the aperture mechanism 30 includes a base 31 and an aperture assembly 32 , the power assembly 13 , the cover plate 11 , the first blade 121 , the second blade 122 , and the visor 14 are arranged on the base. 31.
  • the shutter mechanism further includes a shutter base.
  • the power assembly, the cover plate, the first vane, the second vane, and the shading plate are arranged on the shutter base.
  • the aperture assembly of the aperture mechanism is arranged on the base of the aperture mechanism.
  • the power assembly 13, the cover plate 11, the first blade 121, the second blade 122, the visor 14 and the aperture assembly 32 are all installed on the base 31 of the aperture mechanism 30.
  • the structure of the shutter base is omitted, so that the thickness of the exposure unit 100 in the embodiment of the present application can be further reduced, and the axial thickness of the exposure unit 100 along the optical axis can be reduced, which is beneficial to Thinning of the exposure unit 100 is realized.
  • the base 31 includes a first side 311 and a second side 312 opposite to each other.
  • the seat 132 , the actuator 133 , and the cover 134 of the power assembly 13 are all disposed on the first side 311 of the base 31 , and the cover 11 , the first blade 121 , the second The two blades 122 and the light shielding plate 14 are disposed on the second side 312 of the base 31 , and the transmission member 131 of the power assembly 13 passes through the base 31 and connects with the first blade 121 and the second blade 122 .
  • the space on both sides of the base 31 can be fully utilized to install the power assembly 13 , the cover plate 11 , the first vane 121 , the second vane 122 and the light shielding plate 14 .
  • the seat body 132, the actuator 133, and the cover body 134 of the power assembly 13 can be installed on the base 31, so that the cover plate 11 can be made thinner, and the axial thickness of the exposure unit 100 along the optical axis direction can be reduced, which is beneficial to Thinning of the exposure unit 100 is realized.
  • the cover plate, the first vane, the second vane, and the sunshield are arranged on the second side of the base, and the seat body, the actuator, and the cover body of the power assembly are all arranged on the cover plate away from the On one side of the base, the transmission part of the power assembly passes through the cover plate and is connected with the first blade and the second blade.
  • the power assembly 13 can be close to the first blade 121 and the second blade 122, and the transmission member 131 of the power assembly 13 does not need to pass through the base 31 to connect with the first blade 121 and the second blade 122, so that the length of the transmission member 131 can be made shorter.
  • the aperture assembly 32 includes aperture blades 322 and an aperture actuator (not shown), and the base 31 is provided with an aperture hole 313 .
  • the aperture actuator is used to drive the aperture blades 322 to move to block or open the aperture hole 313 .
  • the exposure unit 100 may further include a circuit board 50 .
  • the circuit board 50 is mounted on the first side 311 or the second side 312 of the base 31 .
  • the circuit board 50 is used for electrical connection between the exposure unit 100 and other devices.
  • the circuit board 50 is used to supply power to the power assembly 13 of the shutter mechanism 10 in the exposure unit 100 and to supply power to the aperture actuator of the aperture assembly 32 .
  • the embodiment of the present application also provides a shutter mechanism 70 of an imaging device 1000 .
  • the shutter mechanism 70 can be applied to the exposure unit 100 of the embodiment of the present application, such as the exposure unit 100 shown in FIGS. 3 and 14 .
  • the shutter mechanism 70 can also be applied to the lens 300 of the embodiment of the present application, such as the lens 300 shown in FIG. 2 .
  • the shutter mechanism 70 can also be applied to an imaging device 1000 according to an embodiment of the present application, such as the imaging device 1000 shown in FIG. 1 .
  • the shutter mechanism 70 further includes a light shielding plate 74 , and the light shielding plate 74 is provided with a light through hole 741 corresponding to the light through hole 711 .
  • the shutter mechanism 70 includes a cover plate 71 , a first limiting member 72 , a power assembly 74 , and a first blade 75 .
  • the cover plate 71 is provided with a light passing hole 711 and a limiting portion 713 .
  • the power assembly 74 includes a cover body 744 , a seat body 742 , an actuator 743 and a transmission member 741 .
  • the actuator 743 can drive the first vane 75 to move on the cover plate 71 through the transmission member 741 to block the optical hole 711 .
  • the first limiting member 72 is used to limit the movement stroke of the first vane 72 when it moves to block the light passing hole 711 .
  • the limit portion 713 is used to limit the movement stroke of the transmission member 741 when the actuator 743 drives the first blade 75 to move to block the optical hole 711 .
  • the actuator 743 drives the first vane 75 to move on the cover plate 71 to cover the optical hole 711 , the collision time between the first vane 75 and the first limiting member 72 is earlier than that between the transmission member 741 and the limiting portion 713 time of collision.
  • the first blade 75 collides before the transmission member 741 .
  • the first vane 75 is deformed after colliding with the first limiting member 72 .
  • the transmission member 741 collides with the limiting portion 713 and rebounds, causing the first blade 75 to lose part of its energy, so that the remaining energy of the first blade 75 after the restoration of deformation is not enough to rebound In order to prevent the first blade 75 from bouncing back and causing the light through hole 711 to be exposed.
  • the transmission member 741 when the first blade 75 is about to rebound after colliding with the first limiting member 72, the transmission member 741 has not yet moved to the position where it can collide with the limiting portion 713. At this time, the transmission member 741 Driven by the actuator 743, the first blade 75 can be driven to move in the direction towards the first limiting member 72, so that the first blade 75 and the first limiting member 72 can be pressed and kept in close contact with the first limiting member 72. close, so as to prevent the first blade 75 from bouncing back and causing the light through hole 711 to be exposed.
  • the first vane 75 When the first vane 75 is in contact with the first limiting part 72, the first vane 75 is deformed, and when the transmission part 741 collides with the limiting part 713 and rebounds, the first vane 75 recovers and deforms. Counteract the tendency of driving the first vane 75 to move when the transmission member 741 rebounds, so that the first vane 75 remains in contact with the first stopper 72, thereby preventing the first vane 75 from leaving the position where it is attached to the first stopper 72.
  • the light passing hole 711 exposes light.
  • the shutter mechanism 10, the shutter mechanism 70, the exposure unit 100, the lens 300, and the imaging device 1000 can ensure that there is no light exposure after the shutter mechanism 10 is closed, so as to improve the final imaging effect of the imaging device 1000.

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  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

一种快门机构(10)，包括盖板(11)，第一限位件(151)和第二限位件(152)，动力组件(13)，第一叶片(121)和第二叶片(122)。在快门机构(10)关闭的过程中，第一叶片(121)碰撞第一限位件(151)的时间与第二叶片(122)碰撞第二限位件(152)的时间不同。还公开了一种曝光单元(100)，镜头(300)及影像设备(1000)。

Description

快门机构、曝光单元、镜头及影像设备 技术领域
本申请涉及摄影技术领域，特别涉及一种快门机构、曝光单元、镜头及影像设备。
背景技术
影像设备的快门机构作为曝光单元的一部分，其对于控制影像设备的感光元器件的感光时间非常重要。评价一个快门性能好坏的主要指标有快门速度、快门口径、快门寿命、稳定性、体积等。在快门关闭时，由于高速碰撞，快门叶片极有可能出现反弹露光的问题，如何减少快门关闭时叶片发生反弹而产生的露光现象，一直是拍摄装置的快门机构设计长期存在的问题。
发明内容
本申请的实施方式提供一种快门机构、曝光单元、镜头、及影像设备。
本申请的实施方式的快门机构包括盖板、第一限位件和第二限位件、动力组件、及第一叶片和第二叶片。所述盖板设有过光孔。所述动力组件能够驱动所述第一叶片和所述第二叶片在所述盖板上移动以遮挡所述过光孔，所述第一限位件和所述第二限位件用于分别限定所述第一叶片和所述第二叶片在移动至遮挡所述过光孔的移动行程。在所述动力组件驱动所述第一叶片和所述第二叶片在所述盖板上移动以遮挡所述过光孔的过程中，所述第一叶片碰撞所述第一限位件的时间与所述第二叶片碰撞所述第二限位件的时间不同。
本申请的实施方式还提供另一种快门机构。所述快门机构包括盖板、第一限位件、动力组件、及第一叶片。所述盖板设有过光孔，所述盖板设有限位部。所述动力组件包括致动器和传动件。所述致动器能够通过所述传动件驱动所述第一叶片在所述盖板上移动以遮挡所述过光孔，所述第一限位件用于限定所述第一叶片在移动至遮挡所述过光孔的移动行程，所述限位部用于限定所述致动器在驱动所述第一叶片移动至遮挡所述过光孔的过程中所述传动件的移动行程。在所述致动器驱动所述第一叶片在所述盖板上移动以遮挡所述过光孔的过程中，所述第一叶片与所述第一限位件碰撞的时间早于所述传动件与所述限位部的碰撞的时间。
本申请的实施方式的曝光单元包括上述实施方式的快门机构及光圈机构。所述快门机构与所述光圈机构结合。
本申请的实施方式的镜头包括壳体、镜片模组及曝光单元。所述镜片模组和所述曝 光单元收容在所述壳体内。所述曝光单元包括上述实施方式的快门机构及光圈机构。所述快门机构与所述光圈机构结合。
本申请的实施的影像设备包括设备本体及镜头。所述镜头安装于所述设备本体。所述镜头包括壳体、镜片模组及曝光单元。所述镜片模组和所述曝光单元收容在所述壳体内。曝光单元包括上述实施方式的快门机构及光圈机构。所述快门机构与所述光圈机构结合。
本申请实施方式的快门机构、曝光单元、镜头、及影像设备能够确保快门机构关闭后不发生露光现象，以提高影像设备最终的成像效果。
本申请的实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实施方式的时间了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本申请某些实施方式的影像设备的立体示意图；
图2是本申请某些实施方式的镜头的剖面示意图；
图3是本申请某些实施方式的曝光单元的立体示分解意图；
图4是本申请某些实施方式的快门机构的部分立体示意图；
图5是本申请某些实施方式的快门机构的俯视图；
图6是一些实施方式的快门机构的叶片反弹导致的露光现象的示意图；
图7是本申请某些实施方式的快门机构的部分立体示意图；
图8是本申请某些实施方式的快门机构的俯视图；
图9是本申请某些实施方式的第一叶片和第二叶片的遮挡过光孔的露光程度与时间的关系示意图；
图10是本申请某些实施方式的第一叶片和第二叶片分别遮挡过光孔的场景示意图；
图11是本申请某些实施方式的第一叶片和第二叶片共同遮挡过光孔的场景示意图；
图12是本申请某些实施方式的第一叶片、第二叶片、及传动件的移动场景示意图；
图13是本申请某些实施方式的第一叶片和第二叶片共同遮挡过光孔的场景示意图；
图14是本申请某些实施方式的曝光单元的立体示分解意图。
具体实施方式
下面详细描述本申请的实施方式，实施方式的示例在附图中示出，其中自始至终相同 或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“厚度”、“上”、“顶”、“底”、“内”、“外”、等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参阅图1，本申请实施方式提供一种影像设备1000。影像设备1000包括设备本体500和镜头300，镜头300安装于设备本体500。在某些实施方式中，设备本体500设有感光元器件(图未示出)。感光元器件能够接收自镜头300进入设备本体500的光线(光信号)，并根据接收到的光线产生电信号。在某些实施方式中，感光元器件是图像传感器，图像传感器能够根据自镜头300进入设备本体500的光线生成图像。
影像设备1000可以是具有拍摄功能的拍摄装置，例如手机、照相机、平板电脑、摄像机、智能手表等拍摄装置，在此不作限制。
请参阅图2，本申请实施方式还提供一种镜头300。镜头300包括壳体310、镜片模组320、及曝光单元100。镜片模组320和曝光单元100收容在壳体310内。镜片模组320可以是多个透镜的组合，也可以是单个透镜，在此不作限制。进入镜头的光线经过镜片模组320后进入曝光单元100，曝光单元100能够对来自镜片模组320的光线做曝光处理，例如控制曝光时间和/或控制曝光量等。镜头300可应用于本申请实施方式中的影像设备1000，例如应用于图1所示的影像设备1000。
请参阅图3，本申请实施方式还提供一种曝光单元100。曝光单元100包括光圈机构30及快门机构10。快门机构10与光圈机构30结合。曝光单元100可应用于本申请实施方式中的镜头300，例如应用于图2所示的镜头300，光圈机构30和快门机构10共同用于实现镜头300的曝光功能。
请参阅图4及图5，本申请实施方式还提供一种快门机构10。快门机构10包括盖板11、第一限位件151、第二限位件152、动力组件13、第一叶片121和第二叶片122。快门机构10可应用于本申请实施方式中的曝光单元100，例如应用于图3所示的曝光单元100。
其中，盖板11设有过光孔111，镜头300接收的光线能够通过过光孔111进入设备本体500，例如进入设备本体500的感光元器件。
动力组件13能够驱动第一叶片121和第二叶片122在盖板11上移动以遮挡过光孔111，第一限位件151和第二限位件152用于分别限定第一叶片121和第二叶片122在移动至遮挡过光孔111的移动行程。
例如，快门机构10在图5所示的状态下处于“快门完全打开”状态，此时第一叶片121和第二叶片122均未遮挡过光孔111。动力组件13能够驱动第一叶片121沿逆时针方向移动以使第一叶片121遮挡过光孔111，以及能够驱动第二叶片122沿顺时针方向移动以使第二叶片122遮挡过光孔111。第一限位件151能够限制第一叶片121沿逆时针方向移动的移动行程(关闭过程的行程)。第二限位件152能够限制第二叶片122沿顺时针方向移动的移动行程(关闭过程的行程)。
在一些实施例中，在叶片关闭的过程中，叶片移动至行程的终点的情况下，叶片能够完全遮挡过光孔。但由于叶片移动至行程的终点与限位件碰撞时会发生反弹使叶片离开行程的终点，导致叶片离开能够完全遮挡过光孔的位置而遮挡不完全，从而使得部分光线进入过光孔。请参阅图6，图6示意叶片反弹而发生露光的过程，其中，横轴为时间轴，纵轴表示进光量的大小。在叶片关闭后，进光量由100％逐渐降低至0％，随后叶片发生反弹而导致露光，在短暂的时间段△T1内进光量由0％增加至10％，导致过光孔露光。随后叶片继续在致动器的驱动下移动至行程终点，进光量再次减小至0％。由于叶片已经发生过碰撞反弹，叶片的速度降低，因此叶片再次与限位件发生碰撞时的反弹程度减小，叶片再次反弹导致在时间段△T2内进光量由0％增加至3％，导致过光孔再次露光。随后叶片继续在致动器133的驱动下移动至行程终点，进光量再次减小至0％，在整个关闭的过程中，由于时间段△T1和时间段△T2存在漏光，一方面可能会导致拍摄出的图像质量下降，例如出现过曝；另一方面会影像拍摄图像的效率，大大降低用户的使用体验。
请结合图8，本申请实施方式的快门机构10、曝光单元100、镜头300、及影像设备1000中，在动力组件13驱动第一叶片121和第二叶片122在盖板11上移动以遮挡过光孔111的过程中，第一叶片121碰撞第一限位件151的时间与第二叶片122碰撞第二限位件152的时间不同。如此，第一叶片121和第二叶片122因碰撞而反弹的时间也不相同。在第一叶片121或第二叶片122中的一个因为碰撞而反弹时，因反弹而未能遮挡住的过光孔111的部分能够被另一叶片遮挡，从而能够避免因叶片反弹导致的过光孔111露光的现象，以提高影像设备1000最终的成像效果。
下面结合附图做进一步说明。
请参阅图1至图5，在某些实施方式中，盖板11的厚度的取值范围为[0.18mm，0.22mm]。例如盖板11的厚度可以为0.18mm、0.19mm、0.20mm、0.21mm、0.22mm或其他厚度，在此不一一列举。盖板11的厚度的取值范围为[0.18mm，0.22mm]，可以使盖板11具有一定的强度，便于盖板11与其他元件结合。并且，能够在保证盖板11强度的情况下使盖板11的厚度尽量薄，以实现快门机构10的小型化、轻薄化，能够减小快门机构沿光轴方向的轴线厚度。
请参阅图5，在某些实施方式中，第一限位件151和第二限位件152自盖板11的表面延伸。
请参阅图3，在某些实施方式中，第一限位件151和第二限位件152自光圈机构30的基座31表面延伸，盖板11设有第一限位孔118和第二限位孔119。在快门机构10与光圈机构30结合的情况下，第一叶片121和第二叶片122位于盖板11和基座31之间，第一限位件151伸入第一限位孔118以限制第一叶片121的移动行程；第二限位件152伸入第二限位孔119以限制第二叶片122的移动行程。
请参阅图3至图4，在某些实施方式中，动力组件13可包括传动件131、座体132、致动器133及盖体134。致动器133安装在座体132上，盖体134安装在座体132上，致动器133收容在座体132和盖体134内。
在一个实施例中，致动器133为电机，传动件131为连接电机转子的连杆，以使传动件131能够在电机的驱动下移动。
在某些实施方式中，第一叶片121与传动件131连接，致动器133能够通过传动件131驱动第一叶片121在盖板11上移动以遮挡过光孔111。第二叶片122与传动件131连接，致动器133能够通过传动件131驱动第二叶片122在盖板11上移动以遮挡过光孔111。
请结合图5，具体地，在某些实施方式中，第一叶片121包括第一遮挡部1211和第一止挡部1212，第一叶片121设有第一穿孔1213，传动件131穿设第一穿孔1213， 第一遮挡部1211用于遮挡过光孔111，第一止挡部1212从第一遮挡部1211的靠近第一限位件151的一侧延伸，并用于在第一叶片121与第一限位件151碰撞时与第一限位件151抵触。第二叶片122包括第二遮挡部1221和第二止挡部1222，第二叶片122设有第二穿孔1223，传动件131穿设第二穿孔1223，第二遮挡部1221用于遮挡过光孔111，第二止挡部1222从第二遮挡部1221的靠近第二限位件152的一侧延伸，并用于在第二叶片122与第二限位件152碰撞时与第二限位件152抵触。
请参阅图5，在某些实施方式中，在快门完全开放的状态下，第一叶片121的第一遮挡部1211和第二叶片122的第二遮挡部1221均未遮挡过光孔111。请结合图7，在动力组件13驱动第一叶片121和第二叶片122在盖板11上移动以遮挡过光孔111的过程中，传动件131沿第一方向Z移动，第一叶片121在传动件131的带动下沿逆时针方向移动，使第一遮挡部1211逐渐遮挡过光孔111，同时第二叶片122在传动件131的带动下沿顺时针方向移动，使第二遮挡部1221逐渐遮挡过光孔111。请结合图8，在快门完全关闭的状态下，第一叶片121的第一止挡部1212与第一限位件151抵触，第二叶片122的第二止挡部1222与第二限位件152抵触，此时第一叶片121的第一遮挡部1211和第二叶片122的第二遮挡部1221共同遮挡过光孔111。
请参阅图9，在某些实施方式中，第一叶片121与第一限位件151碰撞的时间早于第二叶片122与第二限位件152碰撞的时间。图9中横轴是时间轴，纵轴是仅在单一叶片(第一叶片121或第二叶片122)遮挡过光孔111时过光孔111的露光程度，即在单独由第一叶片121遮挡过光孔111或者单独由第二叶片122遮挡过光孔111的情况下过光孔111的露光程度。
请结合图3至图9，自t1时刻起，第一叶片121和第二叶片122在动力组件13的驱动下开始遮挡过光孔111。在动力组件13驱动第一叶片121和第二叶片122在盖板11上移动以遮挡过光孔111的过程中，在t2时刻，沿逆时针方向移动的第一止挡部1212先接触第一限位件151并发生碰撞。在t2至t4的时间段内第一叶片121因为碰撞而产生一定程度的形变，随后恢复形变并在t4时刻产生沿顺时针方向的反弹。在第一叶片121反弹的过程中，传动件131仍然沿第一方向Z移动以带动第一叶片121沿逆时针方向移动，从而在第一叶片121沿顺时针方向反弹一段距离后再次在传动件131的带动下沿逆时针方向移动，直至t5时刻第一叶片121的第一止挡部1212再次与第一限位件151抵触，之后第一叶片121的第一止挡部1212与第一限位件151贴合，使第一叶片121的第一遮挡部1211停留在快门关闭状态下的预定位置遮挡过光孔111。
对于第二叶片122，第二叶片122的第二止挡部1222在t3时刻与第二限位件152碰撞，晚于第一叶片121的第一止挡部1212与第一限位件151碰撞的时刻t2。在t2 时刻，由于第一叶片121发生碰撞而减速，从而与第一叶片121连接的传动件131以及与传动件131连接的第二叶片122也发生减速，从而减速后的第二叶片122在碰撞时的反弹程度小于第一叶片121在碰撞时的反弹程度。在t3至t6的时间段内第二叶片122因为碰撞而产生一定程度的形变，随后恢复形变并在t6时刻产生沿逆时针方向的反弹。反弹的第二叶片122在传动件131的带动下继续沿顺时针方向移动，在t7时刻第二叶片122的第二止挡部1222再次与第二限位件152抵触，之后第二叶片122的第二止挡部1222与第二限位件152贴合，使第二叶片122的第二遮挡部1221停留在快门关闭状态下的预定位置遮挡过光孔111。
对于快门机构10整体，在t2时刻，在第一叶片121和第二叶片122的共同作用下过光孔111被完全遮挡，使快门机构10整体不露光。并且，在t2时刻之后，在第一叶片121和第二叶片122的共同作用下依然能够保持过光孔111被完全遮挡。具体地，第二叶片122和第一叶片121的反弹时间段错开，在第一叶片121反弹的时间段内第二叶片122能够遮挡过光孔111，在第二叶片122反弹的时间段内第一叶片121能够遮挡过光孔111，使快门机构10完全关闭的情况下过光孔111始终能够被叶片遮挡，从而能够避免快门机构10完全关闭后的露光现象。
进一步地，请参阅图10，在某些实施方式中，第一叶片121的第一遮挡部1211到达快门关闭状态下的预定位置时无需完全遮挡过光孔111，第二叶片122的第二遮挡部1221到达快门关闭状态下的预定位置时也无需完全遮挡过光孔111，请结合图11，只需满足第一叶片121的第一遮挡部1211到达快门关闭状态下的预定位置以及第二叶片122的第二遮挡部1221到达快门关闭状态下的预定位置时，第一遮挡部1211和第二遮挡部1221能够共同遮挡过光孔111，并且在第一叶片121反弹时第二遮挡部1221能够遮挡住第一遮挡部1211无法遮挡到的过光孔111的部分；以及在第二叶片122反弹时第一遮挡部1211能够遮挡住第二遮挡部1221无法遮挡到的过光孔111的部分，即可在快门关闭状态完全遮挡过光孔111，并能够防止快门关闭状态下的露光现象。
例如图10所示，区域S1是第一遮挡部1211到达快门关闭状态下的预定位置时无法遮挡的过光孔111区域，区域S2是第二遮挡部1221到达快门关闭状态下的预定位置时无法遮挡的过光孔111区域，区域S3是第一遮挡部1211反弹到最大距离时区域S1以外的遮光孔露光的区域，区域S4是第二遮挡部1221反弹到最大距离时区域S2以外的遮光孔露光的区域。当第一遮挡部1211和第二遮挡部1221均到达快门关闭状态下的预定位置时，第一遮挡部1211能够遮挡第二遮挡部1221无法遮挡的区域S2，第二遮挡部1221能够遮挡第一遮挡部1211无法遮挡的区域S1。在第一叶片121反弹的过程中，第二遮挡部1221能够遮挡第一遮挡部1211无法遮挡的区域S3，在第二叶 片122反弹的过程中，第一遮挡部1211能够遮挡第一遮挡部1211无法遮挡的区域S4。如此，在第一遮挡部1211到达快门关闭状态下的预定位置之后过光孔111能够被完全遮挡。此外，相较于单独的第一遮挡部1211或单独的第二遮挡部1221能够遮挡全部的过光孔111的实施方式，本实施方式可采用较小面积的叶片遮挡过光孔111，能够减少快门机构10整体的重量，利于实现快门机构10的轻薄化。由于叶片的面积减小、叶片的体积和质量也减小，使叶片在快门关闭时移动的转动惯量能够降低，从而能够达到更快的快门速度，以获取更优的快门性能；或者能够采用较低的致动器133的输出扭矩，以节省能量。
需要说明的是，图10至图13仅象征性地示意第一叶片121、第二叶片122和传动件113在快门关闭过程的位置变化情况，并非第一叶片121、第二叶片122和传动件113的实际结构。第一叶片121、第二叶片122和传动件113的实际结构和实际连接关系请参阅图4、图5、图7、图8所示的结构和连接关系。
在一个实施例中，第一止挡部1212和第二止挡部1222的尺寸可不同，以使第一叶片121与第一限位件151碰撞的时间与第二叶片122与第二限位件152碰撞的时间不同。例如，第一止挡部1212相较于第二止挡部1222更长，使第一叶片121和第二叶片122在同一传动件131的带动下移动的情况下第一止挡部1212能够先于第二止挡部1222发生碰撞。
在又一个实施例中，第一止挡部1212和第二止挡部1222的移动行程不同，以使第一叶片121与第一限位件151碰撞的时间与第二叶片122与第二限位件152碰撞的时间不同。例如，请结合图5至图8，第一止挡部1212自图5所示的完全开放状态下的位置移动至图8所示的快门关闭状态下的位置所移动的第一行程小于第二止挡部1222自图5所示的完全开放状态下的位置移动至图8所示的快门关闭状态下的位置所移动的第二行程。如此，第一叶片121和第二叶片122在同一传动件131的带动下移动的情况下，第一止挡部1212移动至达快门关闭状态下的预定位置时，第二止挡部1222还未到达快门关闭状态下的预定位置时，从而使第一止挡部1212能够先于第二止挡部1222发生碰撞。
请参阅图3，在某些实施方式中，盖板11设有限位部113，限位部113用于限定致动器133在驱动第一叶片121和第二叶片122移动至遮挡过光孔的过程中传动件131的移动行程。在一个实施例中，限位部113和传动件131为塑胶材料，以使限位部113和传动件131具有一定的强度，能够承受多次碰撞。
请参阅图3，在某些实施方式中，盖板11设有沟槽112，限位部113为沟槽112的槽壁1121，传动件131伸入沟槽112并能够在致动器133的驱动下在沟槽112内移动。
请参阅图12，在某些实施方式中，在动力组件13驱动叶片在盖板11上移动以遮挡过光孔111的过程中，第一叶片121与第一限位件151碰撞的时间早于传动件131与限位部113碰撞的时间，传动件131与限位部113碰撞后反弹的时间早于第二叶片122与第二限位件152碰撞后反弹的时间。如此，在第二叶片122发生反弹前能够再一次因传动件131与限位部113的碰撞而减速，从而能够进一步减轻第二叶片122的反弹程度，以进一步确保第二叶片122反弹时不露光。
图12示意了快门的完全开放状态到快门的关闭状态的过程中，第一叶片121与过光孔111以及第一限位件151的关系、第二叶片122与过光孔111以及第二限位件152的关系、和传动件131与限位部113的关系。在t1时刻，快门完全开放，第一叶片121的第一遮挡部1211和第二叶片122的第二遮挡部1221均未遮挡过光孔111。在t2时刻，第一叶片121的第一止挡部1212与第一限位件151抵触，此时传动件131并未移动至与限位部113抵触，第二叶片122的第二止挡部1222并未与第二限位件152抵触。在t2至t3的时间段内，第一叶片121发生一定程度的形变并逐渐恢复形变，并在t3时刻发生反弹，使传动件131和第二叶片122的动能(速度)降低，此时传动件131并未移动至与限位部113抵触，第二叶片122的第二止挡部1222并未与第二限位件152抵触。在t3至t4的时间段内，传动件131并未移动至与限位部113抵触，第二叶片122的第二止挡部1222并未与第二限位件152抵触，第一叶片121反弹沿顺时针方向转动至反弹的最大位置后在传动件131的带动下再次沿逆时针方向转动，并在t4时刻再次与第一限位件151抵触。在t5时刻，第二止挡部1222与第二限位件152碰撞，并且传动件131与限位部113碰撞并立即发生反弹，使传动件131和第二叶片122的动能(速度)进一步降低，此时第一止挡部1212已经与第一限位件151抵触。在t5至t6的时间段内，传动件131反弹至最大位置，并在致动器133的驱动下重新朝限位部113移动，第二叶片122因碰撞发生一定程度的形变并逐渐恢复形变，但由于没有完成恢复形变而没有发生反弹。在t6时刻，第二叶片122完成恢复形变并发生反弹。在t7时刻，第二叶片122在传动件131的带动下重新移动至第二止挡部1222与第二限位件152抵触，此时传动件131也与限位部113抵触。
其中，在t2时刻第一止挡部1212第一次与第一限位件151抵触时，过光孔111能够在第一叶片121和第二叶片122的共同遮挡下被完全遮挡而不露光，并且在t2时刻后始终能够在第一叶片121和第二叶片122的共同遮挡下保持不露光，从而解决了快门机构10的第一叶片121和第二叶片122到达快门关闭状态下的终点位置后发生反弹而导致的露光问题。
请参阅图11，在某些实施方式中，限位部113在第一限位件151和第二限位件152之间，限位部113与第一限位件151之间的距离小于限位部113与第二限位件152之间的距离。如此，能够使第一止挡部1212自完全开放状态下的位置移动至快门关闭状态下的 位置所移动的第一行程小于第二止挡部1222自完全开放状态下的位置移动至快门关闭状态下的位置所移动的第二行程，从而使第一止挡部1212能够先于第二止挡部1222发生碰撞。如此，可以在第一叶片121和第二叶片122的尺寸相同的情况下使第一叶片121先于第二叶片122发生碰撞，从而能够采用相同的工序生产第一叶片121和第二叶片122，无需设计尺寸不同的第一叶片121和第二叶片122，以降低对叶片的生产需求。
具体地，在一个实施例中，第一叶片121和第二叶片122的尺寸相同。第一限位件151到限位部113的距离L1小于第二限位件152到限位部113的距离L2，从而在传动件131移动至与限位部113抵触的过程中第一止挡部1212与第一限位件151发生碰撞的时间早于第二止挡部1222与第二限位件152发生碰撞的时间。
请参阅图3及图13，在另一个实施例中，第一叶片121和第二叶片122的尺寸相同，第一限位件151和第二限位件152关于轴线OO1对称，限位部113在轴线OO1上。盖板11上的沟槽112为弧形槽，弧形的沟槽112凸向第一限位件151。如此，能够采用相同的工序生产第一叶片121和第二叶片122，无需设计尺寸不同的第一叶片121和第二叶片122，以降低对叶片的生产需求。进一步地，在某些实施方式中，第一限位件151和第二限位件152并非设置于盖板11，而是设置于其他的器件上。例如请结合图3，第一限位件151和第二限位件152可以设置于曝光单元100的光圈机构30，盖板11安装于光圈机构30使得第一限位件151和第二限位件152能够分别阻挡第一叶片121和第二叶片122在盖板11的移动行程。在此情况下，第一限位件151和第二限位件152能够对称设置于其他的器件上，以降低对设有第一限位件151和第二限位件152的器件的生产需求。
具体地，在传动件131在沟槽112中移动至与限位部113抵触的过程中，在传动件131移动至沟槽112的凸起位置时第一叶片121的第一止挡部1212即可与第一限位件151抵触，在传动件131移动至与沟槽112壁上的限位部113抵触时第二叶片122的第二止挡部1222与第二限位件152抵触，从而使第一叶片121先于第二叶片122发生碰撞。进一步地，传动件131与限位部113均为塑胶材料，在传动件131与限位部113碰撞后立即发生反弹；而第二叶片122与第二限位件152发生碰撞后第二叶片122发生一定程度的形变，在第二叶片122恢复形变后才发生反弹，从而第二叶片122与第二限位件152碰撞的时间与传动件131与限位部113碰撞的时间相同，但传动件131能够先于第二叶片122发生反弹，以在第二叶片122反弹前降低第二叶片122的动能，使第二叶片122的反弹程度降低。
请参阅图7，在某些实施方式中，盖板11设有第一导轨115和第二导轨116。第一叶 片121在盖板11上沿第一导轨115移动，第一导轨115能够限制第一叶片121的移动轨迹，使第一叶片121按第一导轨115形成的轨迹移动。第二叶片122在盖板11上沿第二导轨116移动，第二导轨116能够限制第二叶片122的移动轨迹，使第二叶片122按第二导轨116形成的轨迹移动。
进一步地，在某些实施方式中，第一叶片121和第二叶片122层叠设置在盖板11，第一导轨115和第二导轨116自盖板11的表面延伸。其中，第一导轨115相对盖板11的表面延伸的高度与第二导轨116相对盖板11的表面延伸的高度不同，以使第一叶片121和第二叶片122在不同的高度移动，避免第一叶片121和第二叶片122之间发生碰撞。在一个实施例中第一导轨115的高度小于第二导轨116的高度，第一叶片121能够在第二叶片122的下方沿第一轨道移动，避免在移动时与第二叶片122发生碰撞。在另一个实施例中第一导轨115的高度大于第二导轨116的高度，第一叶片121能够在第二叶片122的上方沿第一轨道移动，避免在移动时与第二叶片122发生碰撞。
请参阅图3，在某些实施方式中，快门机构10还包括遮光板14，遮光板14位于盖板11的第一侧115，第一叶片121和第二叶片122收容在盖板11和遮光板14之间。光线能够自盖板11的第二侧117进入过光孔111，遮光板14用于遮挡进入盖板11的第一侧115的光线。
在某些实施方式中，遮光板14用于将第一叶片121和第二叶片122压紧在盖板11的表面，以便于第一叶片121和第二叶片122能够贴合盖板11的表面移动(在某些实施方式中为贴合自盖板11表面延伸的轨道移动)。
在某些实施方式中，遮光板14的厚度的取值范围为[40.0μm，60.0μm]，例如遮光板14的厚度的取值可以为40.0μm、42.0μm、44.0μm、46.0μm、48.0μm、50.0μm、52.0μm、54.0μm、56.0μm、58.0μm、60μm或其他取值，在此不一一列举。遮光板14的厚度的取值范围为[40.0μm，60.0μm]，能够使遮光板14具有一定的强度，便于与其他器件结合，并且遮光板14的厚度较薄，利于实现快门机构10的轻薄化。
在某些实施方式中，遮光板14包括通光孔141，通光孔141与过光孔111对应。自过光孔111进入盖板11第一侧115的光线能够经过通光孔141进入与快门机构10连接的其他器件。例如，请结合图3，在某些实施例中快门机构10与光圈机构30连接，进入快门机构10的光线能够依次通过过光孔111和通光孔141进入光圈机构30。
在某些实施方式中，第一限位件151和第二限位件152自遮光板14的表面延伸，以用于限制遮光板14和盖板11之间的第一叶片121和第二叶片122的移动行程。
请参阅图3，本申请实施方式提供的曝光单元100包括快门机构10及光圈机构30。快门机构10可以是上述任一实施方式中的快门机构10。
在某些实施方式中，快门机构10的厚度的取值范围为[0.38mm，0.42mm]，例如快门机构10的厚度的取值可以为0.38mm、0.39mm、0.40mm、0.41mm、0.42mm或其他取值，在此不一一列举。曝光单元100的厚度的取值范围为[2.50mm，2.90mm]，例如曝光单元100的厚度的取值可以为2.50mm、2.60mm、2.70mm、2.80mm、2.90mm或其他取值，在此不一一列举。如此，快门机构10和曝光单元100能够在具有较高的强度的情况下具有较薄的厚度，以减小曝光单元100沿光轴方向的轴向厚度，利于实现曝光单元100的轻薄化。
请参阅图3，在某些实施方式中，光圈机构30包括基座31和光圈组件32，动力组件13、盖板11、第一叶片121、第二叶片122、及遮光板14设置于基座31。
在一些实施方式的曝光单元中，快门机构还包括快门基座。动力组件、盖板、第一叶片、第二叶片、及遮光板设置于快门基座。光圈机构的光圈组件设置于光圈机构的基座。相较于图3所示的实施方式的曝光单元100，多出了快门基座，从而沿光轴方向的厚度较大。本申请的实施方式中，动力组件13、盖板11、第一叶片121、第二叶片122、及遮光板14与光圈组件32均安装在光圈机构30的基座31，相较于一些实施方式中具有快门基座的曝光单元而言省去了快门基座这一结构，使本申请实施方式的曝光单元100的厚度得以进一步降低，能够减少曝光单元100沿光轴方向的轴向厚度，利于实现曝光单元100的轻薄化。
请参阅图3，在某些实施方式中，基座31包括相背的第一侧311和第二侧312。
在一个实施例中，如图3所示，动力组件13的座体132、致动器133、盖体134均设置于基座31的第一侧311，盖板11、第一叶片121、第二叶片122及遮光板14设置于基座31的第二侧312，动力组件13的传动件131穿设基座31并与第一叶片121及第二叶片122连接。如此，能够充分利用基座31两侧的空间安装动力组件13、盖板11、第一叶片121、第二叶片122及遮光板14。并且，动力组件13的座体132、致动器133、盖体134可以安装于基座31，使盖板11可以做得更薄，能够减少曝光单元100沿光轴方向的轴向厚度，利于实现曝光单元100的轻薄化。
在另一个实施例中，盖板、第一叶片述第二叶片及遮光板设置于基座的第二侧，动力组件的座体、致动器、盖体均设置于盖板的远离所述基座的一侧，动力组件的传动件穿设盖板并与第一叶片及第二叶片连接。如此，动力组件13能够靠近第一叶片121和第二叶片122，动力组件13的传动件131无需穿过基座31与第一叶片121和第二叶片122连接，使传动件131的长度可以做得较短。
请参阅图3，在某些实施方式中，光圈组件32包括光圈叶片322及光圈致动器(图未示出)，基座31设有光圈孔313。光圈致动器用于驱动光圈叶片322移动以遮挡或开放光圈孔313。
请参阅图3，在某些实施方式中，曝光单元100还可包括电路板50。电路板50安装在基座31的第一侧311或第二侧312。在一个实施例中，电路板50用于曝光单元100与其他器件之间的电连接，例如图1所示，电路板50用于曝光单元100与影像设备1000的设备本体500连接。在又一个实施例中，电路板50用于为曝光单元100中快门机构10的动力组件13供电，以及为光圈组件32的光圈致动器供电。
请参阅图14，本申请实施方式还提供一种影像设备1000的快门机构70。快门机构70可应用于本申请实施方式的曝光单元100，例如图3及图14所示的曝光单元100。快门机构70还可应用于本申请实施方式的镜头300，例如图2所示的镜头300。快门机构70还可应用于本申请实施方式的影像设备1000，例如图1所示的影像设备1000。
请参阅图14，在某些实施方式中，快门机构70还包括遮光板74，遮光板74设有通光孔741，通光孔741与过光孔711对应。
快门机构70包括盖板71、第一限位件72、动力组件74、及第一叶片75。其中，盖板71设有过光孔711及限位部713。动力组件74包括盖体744、座体742、致动器743及传动件741。致动器743能够通过传动件741驱动第一叶片75在盖板71上移动以遮挡过光孔711。第一限位件72用于限定第一叶片72在移动至遮挡过光孔711的移动行程。限位部713用于限定致动器743在驱动第一叶片75移动至遮挡过光孔711的过程中传动件741的移动行程。在致动器743驱动第一叶片75在盖板71上移动以遮挡过光孔711的过程中，第一叶片75与第一限位件72碰撞的时间早于传动件741与限位部713的碰撞的时间。
本申请实施方式的快门机构70中，第一叶片75先于传动件741发生碰撞。在一个实施例中，第一叶片75与第一限位件72碰撞后发生形变。随后，在第一叶片75恢复形变之前传动件741与限位部713发生碰撞并发生反弹，使第一叶片75损失部分能量，从而导致第一叶片75在恢复形变后剩余的能量不足以发生反弹，以避免第一叶片75反弹导致过光孔711露光。在另一个实施例中，第一叶片75与第一限位件72碰撞后即将发生反弹的过程中，传动件741仍未移动至能够与限位部713发生碰撞的位置，此时传动件741能够在致动器743的驱动下带动第一叶片75沿朝向第一限位件72的方向移动，使第一叶片75与第一限位件72压紧并保持与第一限位件72贴合，从而避免第一叶片75反弹导致过光孔711露光。在第一叶片75与第一限位件72贴合的过程中，第一叶片75发生形变，在传动件741与限位部713发生碰撞并发生反弹的过程中，第一叶片75恢复形变以抵消传动件741反弹时带动第一叶片75移动的趋势，使第一叶片75保持与第一限位件72贴合，从而避免第一叶片75离开与第一限位件72贴合的位置导致过光孔711露光。
综上，本申请实施方式的快门机构10、快门机构70、曝光单元100、镜头300、及影像设备1000能够确保快门机构10关闭后不发生露光现象，以提高影像设备1000最终的成像效果。
在本说明书的描述中，参考术语“一个实施方式”、“一些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。

Claims (17)

  1. 一种影像设备的快门机构，其特征在于，包括：
    盖板，所述盖板设有过光孔；
    第一限位件和第二限位件；
    动力组件；及
    第一叶片和第二叶片，所述动力组件能够驱动所述第一叶片和所述第二叶片在所述盖板上移动以遮挡所述过光孔，所述第一限位件和所述第二限位件用于分别限定所述第一叶片和所述第二叶片在移动至遮挡所述过光孔的移动行程；
    在所述动力组件驱动所述第一叶片和所述第二叶片在所述盖板上移动以遮挡所述过光孔的过程中，所述第一叶片碰撞所述第一限位件的时间与所述第二叶片碰撞所述第二限位件的时间不同。
  2. 根据权利要求1所述的快门机构，其特征在于，所述动力组件包括致动器和传动件，所述第一叶片与所述传动件连接，所述致动器能够通过所述传动件驱动所述第一叶片在所述盖板上移动以遮挡所述过光孔；所述第二叶片与所述传动件连接，所述致动器能够通过所述传动件驱动所述第二叶片在所述盖板上移动以遮挡所述过光孔；
    所述第一叶片与所述第一限位件碰撞的时间早于所述第二叶片与所述第二限位件碰撞的时间。
  3. 根据权利要求2所述的快门机构，其特征在于，所述盖板设有限位部，所述限位部用于限定所述致动器在驱动所述第一叶片和所述第二叶片移动至遮挡所述过光孔的过程中所述传动件的移动行程。
  4. 根据权利要求3所述的快门机构，其特征在于，在所述动力组件驱动所述第一叶片和所述第二叶片在所述盖板上移动以遮挡所述过光孔的过程中，所述第一叶片与所述第一限位件碰撞的时间早于所述传动件与所述限位部碰撞的时间，所述传动件与所述限位部碰撞后反弹的时间早于所述第二叶片与所述第二限位件碰撞后反弹的时间。
  5. 根据权利要求2所述的快门机构，其特征在于，所述动力组件还包括：
    座体，所述致动器安装在所述座体，所述致动器用于驱动所述传动件带动所述第一叶片和所述第二叶片在所述盖板上移动以遮挡所述过光孔；及
    盖体，所述盖体安装在所述座体，所述致动器收容在所述座体和所述盖体内。
  6. 根据权利要求1所述的快门机构，其特征在于，所述盖板设有：
    第一导轨，所述第一叶片在所述盖板上沿所述第一导轨移动；及
    第二导轨，所述第二叶片在所述盖板上沿所述第二导轨移动。
  7. 根据权利要求6所述的快门机构，其特征在于，所述第一叶片和所述第二叶片层叠设置在所述盖板，所述第一导轨和所述第二导轨自所述盖板的表面延伸，所述第一导轨的高度小于所述第二导轨的高度。
  8. 根据权利要求1所述的快门机构，其特征在于，所述快门机构还包括遮光板，所述遮光板设有通光孔，所述遮光板位于所述盖板的第一侧，所述通光孔与所述过光孔对应，所述第一叶片和所述第二叶片收容在所述盖板和所述遮光板之间。
  9. 根据权利要求8所述的快门机构，其特征在于，所述第一限位件和/或所述第二限位件自所述遮光件的表面延伸；或
    所述第一限位件和/或所述第二限位件自所述盖板的表面延伸。
  10. 一种影像设备的快门机构，其特征在于，包括：
    盖板，所述盖板设有过光孔及限位部；
    第一限位件；
    动力组件，包括致动器和传动件；及
    第一叶片，所述致动器能够通过所述传动件驱动所述第一叶片在所述盖板上移动以遮挡所述过光孔，所述第一限位件用于限定所述第一叶片在移动至遮挡所述过光孔的移动行程，所述限位部用于限定所述致动器在驱动所述第一叶片移动至遮挡所述过光孔的过程中所述传动件的移动行程；
    在所述致动器驱动所述第一叶片在所述盖板上移动以遮挡所述过光孔的过程中，所述第一叶片与所述第一限位件碰撞的时间早于所述传动件与所述限位部的碰撞的时间。
  11. 一种曝光单元，其特征在于，包括：
    权利要求1-8及10任意一项所述的快门机构；及
    光圈机构，所述快门机构与所述光圈机构结合。
  12. 根据权利要求11所述的曝光单元，其特征在于，所述光圈机构包括基座和光圈组件，所述动力组件、所述盖板、所述第一叶片、所述第二叶片及所述遮光板设置于所述基座。
  13. 根据权利要求12所述的曝光单元，其特征在于，所述限位件设置于所述基座。
  14. 根据权利要求11所述的曝光单元，其特征在于，所述基座包括相背的第一侧和第二侧，
    所述动力组件的座体、致动器、盖体均设置于所述基座的第二侧，所述盖板、所述第一叶片、所述第二叶片及所述遮光板设置于所述基座的第一侧，所述动力组件的传动件穿设所述基座并与所述第一叶片及所述第二叶片连接；或
    所述盖板、所述第一叶片、所述第二叶片及所述遮光板设置于所述基座的第二侧，所述动力组件的座体、致动器、盖体均设置于所述盖板的远离所述基座的一侧，所述动力组件的传动件穿设所述盖板并与所述第一叶片及所述第二叶片连接。
  15. 根据权利要求14所述的曝光单元，其特征在于，所述曝光单元还包括电路板，
    所述电路板安装在所述基座的第一侧；或
    所述电路板安装在所述基座的第二侧。
  16. 一种镜头，其特征在于，包括：
    壳体；
    镜片模组；及
    权利要求11-15任意一项所述的曝光单元，所述镜片模组和所述曝光单元收容在所述壳体内。
  17. 一种影像设备，其特征在于，包括：
    设备本体；及
    权利要求16所述的镜头，所述镜头安装于所述设备本体。
PCT/CN2021/128792 2021-11-04 2021-11-04 快门机构、曝光单元、镜头及影像设备 WO2023077380A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002296639A (ja) * 2001-03-29 2002-10-09 Canon Electronics Inc シャッタ装置およびカメラ
JP2008033119A (ja) * 2006-07-31 2008-02-14 Nidec Copal Corp カメラ用羽根駆動装置
CN101546092A (zh) * 2008-03-24 2009-09-30 亚洲光学股份有限公司 镜头的防尘盖结构
CN102934022A (zh) * 2010-12-22 2013-02-13 精工精密株式会社 叶片驱动装置和光学设备
JP2016218195A (ja) * 2015-05-19 2016-12-22 キヤノン電子株式会社 羽根駆動装置、及びシャッタ装置、並びに撮像装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002296639A (ja) * 2001-03-29 2002-10-09 Canon Electronics Inc シャッタ装置およびカメラ
JP2008033119A (ja) * 2006-07-31 2008-02-14 Nidec Copal Corp カメラ用羽根駆動装置
CN101546092A (zh) * 2008-03-24 2009-09-30 亚洲光学股份有限公司 镜头的防尘盖结构
CN102934022A (zh) * 2010-12-22 2013-02-13 精工精密株式会社 叶片驱动装置和光学设备
JP2016218195A (ja) * 2015-05-19 2016-12-22 キヤノン電子株式会社 羽根駆動装置、及びシャッタ装置、並びに撮像装置

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