CN114911113B - Electromagnetic mechanical shutter with rotating blade structure - Google Patents

Electromagnetic mechanical shutter with rotating blade structure Download PDF

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Publication number
CN114911113B
CN114911113B CN202210121051.4A CN202210121051A CN114911113B CN 114911113 B CN114911113 B CN 114911113B CN 202210121051 A CN202210121051 A CN 202210121051A CN 114911113 B CN114911113 B CN 114911113B
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Prior art keywords
blade
shading
rotary
transmission
shutter
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CN202210121051.4A
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CN114911113A (en
Inventor
张玉衡
张征峡
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National Astronomical Observatories of CAS
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National Astronomical Observatories of CAS
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    • 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
    • G03B9/18—More than two members
    • G03B9/22—More than two members each moving in one direction to open and then in opposite direction to close, e.g. iris type
    • 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
    • G03B9/26—Blade or disc rotating or pivoting about axis normal to its plane incorporating cover blade or blades
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Shutters For Cameras (AREA)

Abstract

The invention relates to the field of cameras, in particular to an electromagnetic mechanical shutter with a rotating blade structure, which comprises: at least one rotary shutter member; wherein the rotary shutter part includes: the shading device comprises an upper transmission component, a plurality of upper shading blades (8-1), a blade supporting plate (10), a plurality of lower shading blades (8-2) and a lower transmission component; the power management controller is used for synchronously sending an opening or closing driving signal to the upper transmission assembly and the lower transmission assembly; and the upper transmission assembly and the lower transmission assembly respectively drive the upper shading blades (8-1) and the lower shading blades (8-2) to rotate to an opening position or a closing position by taking the corresponding rotating connection points as rotating centers when receiving opening or closing driving signals sent by the power management controller. The invention adopts a multilayer shading blade structure, so that the light-passing aperture is larger under the condition that the cross section of the shutter is not changed, the opening and closing continuity of the shading blades is high, and the vibration is smaller.

Description

Electromagnetic mechanical shutter with rotating blade structure
Technical Field
The invention relates to the field of cameras, in particular to an electromagnetic mechanical shutter with a rotating blade structure.
Background
With the continuous development of camera manufacturing technology, the performance index of cameras is continuously improved. The size of the photosensitive area of the image sensor is one of the most important indicators. The larger the photosensitive area of the image sensor, the more photons are captured per unit time, and the better the photosensitive characteristics are. In the fields of aerospace, medicine, astronomy and the like with special requirements on high-quality imaging, in order to pursue higher and higher image quality, the breadth of camera image sensors is also developing towards a larger trend. The larger the image sensor, the larger the required shutter opening size. For the same shutter structure, a series of problems are caused when the window size becomes large. Compared with a small-size shutter, the large-size shutter with the same structure has the advantages of lower working efficiency, higher energy consumption and easier vibration generation, and the large window size can ensure that the motion stroke of a single blade is longer and the shortest opening and closing time of the shutter is longer.
The single-layer rotating blade type shutter is a common shutter type at present, is a shutter structure with a hole opened from the center and comprises a main body frame, a turntable bearing, a shading blade and the like. For example, a non-contact shutter actuating system and method disclosed in patent 201210293037.9 employs a single-layer rotating blade type shutter, and uses a reciprocating rotating driving ring to drive the single-layer blades connected to the driving ring to open or close. When the shutter is operated, the light transmitting hole is opened from the center by the rotating blade, and the opened blade is accommodated in a space outside the light transmitting hole. The opening-closing diameter ratio is a key index of the rotary blade type shutter. The opening-closing ratio is equal to the ratio of the diameter D1 of the light through hole of the shutter to the diameter D2 of the maximum shell of the shutter, as shown in FIG. 1. D1 reflects the size of the shutter clear aperture and D2 reflects the total volume size of the shutter. It is desirable that the diameter D1 of the light-passing hole of the shutter is as large as possible, and the diameter D2 of the maximum housing of the shutter is as small as possible, so that the total volume of the shutter is reduced, which contributes to reducing the overall volume of the camera. The shading blade adopted in the patent 201210293037.9 is of a single-layer structure, the theoretical limit opening-closing ratio is 0.5, and the receiving area is approximately equal to the windowing area.
However, in practical engineering implementation, problems such as material connection and shielding loss need to be considered, and the opening-closing ratio of the actual shutter is more than 0.65, that is, the storage area is larger than the window area. For the shutter with the larger diameter D1 of the light through hole, if the prior art is used, the area of the blade is correspondingly increased for blocking a lens, so that the size of the maximum shell diameter D2 of the shutter is also large and is more than one time of the diameter D1 of the light through hole, and the opening-closing diameter ratio is large. The opening-closing diameter ratio can be reduced by increasing the number of the blades, but in the prior art, the blades are driven by a rotary electromagnet through a mechanical transmission mechanism, namely a driving ring, all the blades are driven to move simultaneously, and theoretically, the same power is distributed to each blade.
Disclosure of Invention
The invention aims to solve the problems of large opening-closing ratio and poor motion precision caused by the fact that blades are difficult to achieve the same motion effect in the conventional single-layer rotating blade type shutter, and provides an electromagnetic mechanical shutter with a rotating blade structure.
In order to solve the above technical problem, an electromagnetic mechanical shutter of a rotary blade structure according to an aspect of the present invention includes: a top cover 2, a rotary shutter member, a bottom cover 13, and a power management controller, wherein the shutter comprises: at least one rotary shutter member; wherein,
the rotary shutter member is disposed between the top cover 2 and the bottom cover 13, and includes: the shading device comprises an upper transmission component, a plurality of upper shading blades 8-1, a blade supporting plate 10, a plurality of lower shading blades 8-2 and a lower transmission component; wherein,
the blade supporting plate 10 is circular, and one ends of the upper shading blades 8-1 are uniformly distributed above the blade supporting plate 10 and close to the outer edge, and are rotatably connected with the blade supporting plate; one end of each lower shading blade 8-2 is uniformly distributed below the blade supporting plate 10 and close to the outer edge, and is rotatably connected with the blade supporting plate; wherein,
the rotating connection point of the upper shading blade 8-1 and the blade support plate 10 and the rotating connection point of the lower shading blade 8-2 and the blade support plate 10 are alternately arranged in the same circumference;
the power management controller is used for synchronously sending an opening or closing driving signal to the upper transmission assembly and the lower transmission assembly;
the upper transmission component is fixed below the top cover 2 and is used for driving the upper shading blades 8-1 to rotate to an opening position or a closing position by taking the corresponding rotating connection points as rotating centers respectively when receiving an opening or closing driving signal sent by the power management controller;
the lower transmission component is fixed above the bottom cover 13, and is used for driving the lower shading blades 8-2 to respectively rotate to an opening position or a closing position by taking the corresponding rotation connecting points as rotation centers when receiving an opening or closing driving signal sent by the power management controller.
As an improvement of the device, an upper rotating shaft 9-1 is uniformly arranged between the blade supporting plate 10 and the upper transmission component; one end of the upper rotating shaft 9-1 is fixed on the blade supporting plate 10, and the other end of the upper rotating shaft passes through the positioning hole of the upper shading blade 8-1 to be fixedly connected with the upper transmission component, so that the upper shading blade 8-1 is rotatably connected with the blade supporting plate 10 by taking the upper rotating shaft 9-1 as a rotating center;
a lower rotating shaft 9-2 is uniformly arranged between the blade supporting plate 10 and the lower transmission component; one end of the lower rotating shaft 9-2 is fixed on the blade supporting plate 10, and the other end of the lower rotating shaft passes through the positioning hole of the lower shading blade 8-2 to be fixedly connected with the lower transmission assembly, so that the lower shading blade 8-2 is rotationally connected with the blade supporting plate 10 by taking the lower rotating shaft 9-2 as a rotating center; wherein,
the upper rotating shafts 9-1 and the lower rotating shafts 9-2 are alternately arranged in the same circle;
the blade supporting plate 10 is also provided with a supporting plate transmission groove near the fixed point of each upper rotating shaft 9-1 and each lower rotating shaft 9-2;
each upper shading blade 8-1 and each lower shading blade 8-2 are respectively provided with a blade transmission hole near the fixed point of the corresponding upper rotating shaft 9-1 or lower rotating shaft 9-2;
the upper transmission assembly and the lower transmission assembly comprise a plurality of cantilevers which respectively penetrate through the corresponding blade transmission holes and the corresponding support plate transmission grooves; when the upper transmission assembly and the lower transmission assembly receive an opening or closing driving signal sent by the power management controller, the upper shading blade 8-1 and the lower shading blade 8-2 are driven to rotate around the corresponding upper rotating shaft 9-1 or lower rotating shaft 9-2 through the cantilever, so that the upper shading blade 8-1 and the lower shading blade 8-2 move to an opening position or a closing position.
As an improvement of the above apparatus, the upper transmission assembly comprises: a plurality of upper circuit boards 3-1, a plurality of upper rotary electromagnets 5-1 and an upper pressure plate 6; wherein,
the upper circuit boards 3-1 are uniformly distributed around the upper pressing plate 6 and fixed above the upper pressing plate;
the upper rotary electromagnets 5-1 are arranged between the two upper circuit boards 3-1, fixed above the upper pressing plate 6 and connected with the corresponding circuit boards 3-1;
the upper pressing plate 6 is provided with a plurality of upper pressing plate transmission grooves; the upper pressure plate transmission grooves are the same as the support plate transmission grooves near the upper rotating shaft 9-1 in shape and correspond in position;
the upper rotary electromagnet 5-1 is also fixedly connected with the cantilever; the cantilever is driven by the upper rotating electromagnet 5-1, rotates around the axis of the upper rotating electromagnet 5-1, the tail end of the cantilever sequentially penetrates through the corresponding upper pressing plate transmission groove, the blade transmission hole and the supporting plate transmission groove, and drives the corresponding upper shading blade 8-1 to rotate through the blade transmission hole.
As an improvement of the above apparatus, the lower drive assembly comprises: a plurality of lower circuit boards 3-2, a plurality of lower rotary electromagnets 5-2 and a lower pressing plate 11; wherein,
the lower circuit boards 3-2 are uniformly distributed around the lower pressing plate 11 and fixed below the lower pressing plate;
the lower rotary electromagnets 5-2 are arranged between the two lower circuit boards 3-2, fixed below the lower pressing plate 11 and connected with the corresponding lower circuit boards 3-2;
the lower pressing plate 11 is provided with a plurality of lower pressing plate transmission grooves; the transmission grooves of the lower pressing plates have the same shape as the transmission grooves of the supporting plate near the lower rotating shaft 9-2 and correspond to the positions of the transmission grooves;
the lower rotary electromagnet 5-2 is fixedly connected with a cantilever, the cantilever is driven by the lower rotary electromagnet 5-2 to rotate around the axis of the lower rotary electromagnet 5-2, the tail end of the cantilever sequentially penetrates through the corresponding lower pressing plate transmission groove, the corresponding blade transmission hole and the corresponding support plate transmission groove, and the corresponding lower shading blade 8-2 is driven to rotate through the blade transmission hole.
As a modification of the above apparatus, the upper platen 6 and the lower platen 11 are provided at their outer edges with flanges; the flange of the upper pressure plate 6 and the flange of the lower pressure plate 11 are oppositely arranged and are compressed and fixed through screws;
a plurality of supporting columns 12 are arranged between the top cover 2 and the upper pressing plate 6, and two ends of each supporting column are respectively fixedly connected with the top cover 2 and the upper pressing plate 6;
a plurality of support columns 12 are arranged between the lower pressing plate 11 and the bottom cover 13, and two ends of the support columns are respectively fixedly connected with the lower pressing plate 11 and the bottom cover 13.
As an improvement of the above device, after the power management controller receives a shutter action command sent from the upper computer, the power management controller calls a preset value of a driving voltage based on a shutter action command state, controls the DA converters and the amplifying circuits of the upper circuit board 3-1 and the lower circuit board 3-2 to generate a working voltage matched with the preset value of the driving voltage, and loads the working voltage to the corresponding upper rotary electromagnet 5-1 or the corresponding lower rotary electromagnet 5-2.
As an improvement of the above apparatus, the power management controller is further configured to read a current Ii of each of the upper rotary electromagnet 5-1 and the lower rotary electromagnet 5-2, and determine whether the read current Ii matches a preset value Vf of the driving voltage, wherein when the read current Ii is equal to a standard current value If, it is determined that there is a match;
if the driving voltage is matched with the preset value Vf of the driving voltage, the power management controller saves the current preset value Vf of the driving voltage;
if the current Ii is not matched with the standard current value If, replacing the current preset value of the driving voltage by the power management controller after subtracting a fixed voltage variation quantity delta V from the current preset value Vf of the driving voltage, repeating the step until the read current Ii is equal to the standard current value If, and storing the current preset value Vf of the driving voltage;
if the current Ii is not matched with the standard current value If, replacing the current preset value Vf of the driving voltage by the power management controller after adding the fixed voltage variation quantity DeltaV to the current preset value Vf of the driving voltage, repeating the matching step until the read current Ii is equal to the standard current value If, and storing the current preset value Vf of the driving voltage;
and the standard current value If is the current value of the upper rotating electromagnet 5-1 or the lower rotating electromagnet 5-2 under the condition that the driving voltage preset value Vf is matched.
When the shutter includes a plurality of rotary shutter members, adjacent rotary shutter members are fixedly connected by screws.
As a modification of the above device, the materials of the top cover 2 and the bottom cover 13 include: a light metal material.
As a modification of the above device, the material of the upper and lower shade blades 8-1 and 8-2 includes: stainless steel.
The electromagnetic mechanical shutter with the rotating blade structure provided by the invention adopts a unique multilayer shading blade structure to replace a traditional single-layer shading blade structure, shares a total shading surface by a plurality of shading blade layers, and all the blade layers of the shutter share the same storage area, so that the opening-closing diameter ratio of the shutter reaches 0.48, a larger blade storage space can be obtained under the condition that the cross section of the shutter is not changed, a larger light transmission aperture can be obtained under the condition that the blade storage space is not increased, a larger and narrower shutter is formed, and the larger light transmission aperture of the shutter can be obtained. The invention also adopts a unique blade driving mode of 'centralized control distributed driving'. The centralized control is that one synchronous signal is used to control the action of all the rotating electromagnets to make the action of all the blades be in step. Specifically, the power management controller is used for responding to a shutter action command and controlling the circuit boards to generate driving voltage so as to drive the corresponding rotary electromagnets to rotate simultaneously. The distributed driving is that each blade is driven by a separate rotary electromagnet, the power of the blade can be finely adjusted, the problem of inconsistent power required by the blades due to physical and environmental differences is solved, the continuity of opening and closing of the blades is kept, the vibration is smaller, and the shutter control device is beneficial to obtaining higher shutter action precision.
Drawings
FIG. 1 is a schematic diagram of a prior art rotary blade shutter;
FIG. 2 is an exploded view of an electromagnetic mechanical shutter of a rotary blade structure provided in embodiment 1 of the present invention;
FIG. 3 is a perspective view of an electromagnetic mechanical shutter of a rotary blade structure provided in embodiment 1 of the present invention;
fig. 4 is a perspective view of a top cover provided in embodiment 1 of the present invention;
fig. 5 is a schematic view of a rotary electromagnet according to embodiment 1 of the present invention;
FIG. 6 is a perspective view of an upper platen according to embodiment 1 of the present invention;
fig. 7 is a front view of a light-shielding blade provided in embodiment 1 of the present invention;
FIG. 8 is a perspective view of a blade support plate provided in embodiment 1 of the present invention;
fig. 9 is a perspective view of a lower platen according to embodiment 1 of the present invention;
fig. 10 is a perspective view of a support column provided in embodiment 1 of the present invention;
fig. 11 is a perspective view of a bottom cover according to embodiment 1 of the present invention;
fig. 12 is a first operational schematic diagram of a power management controller according to embodiment 1 of the present invention;
fig. 13 is a second operation schematic diagram of the power management controller according to embodiment 1 of the present invention.
Reference symbols of the drawings
1. First countersunk screw 2, top cover 3-1 and upper circuit board
3-2 parts of lower circuit board 4, 5-1 parts of pan head screw and upper rotary electromagnet
5-2 parts of lower rotary electromagnet 6, upper pressure plate 7 and second countersunk screw
8-1, upper shading blade 8-2, lower shading blade 9-1 and upper rotating shaft
9-2, a lower rotating shaft 10, a blade supporting plate 11 and a lower pressing plate
12. Support column 13 and bottom cover
Detailed Description
The technical scheme provided by the invention is further illustrated by combining the following embodiments.
The invention provides an electromagnetic mechanical shutter with a rotating blade structure, wherein shading blades are distributed on a plurality of planes, a plurality of blades positioned on different planes and different positions act simultaneously and share the function of shading a light through hole, the multi-layer structure can reduce the number of blades on each shading plane, the number of blades on a single shading plane is less, the area occupied by the edge of the shutter for accommodating the blades is smaller, and the edge of the shutter is thinner.
Specifically, as shown in fig. 1 to 3, the present invention provides an electromagnetic mechanical shutter with a rotary blade structure, including: a top cover 2, a rotary shutter member, a bottom cover 13, and a power management controller, wherein the shutter comprises: at least one rotary shutter member; wherein,
the rotary shutter member is disposed between the top cover 2 and the bottom cover 13, and includes: the shading device comprises an upper transmission component, a plurality of upper shading blades 8-1, a blade supporting plate 10, a plurality of lower shading blades 8-2 and a lower transmission component; wherein,
the blade supporting plate 10 is circular, and one ends of the upper shading blades 8-1 are uniformly distributed above the blade supporting plate 10 and close to the outer edge, and are rotatably connected with the blade supporting plate; one end of each lower shading blade 8-2 is uniformly distributed below the blade supporting plate 10 and close to the outer edge, and is rotatably connected with the blade supporting plate; wherein,
the rotating connection point of the upper shading blade 8-1 and the blade support plate 10 and the rotating connection point of the lower shading blade 8-2 and the blade support plate 10 are alternately arranged in the same circumference;
the power management controller is used for synchronously sending an opening or closing driving signal to the upper transmission assembly and the lower transmission assembly;
the upper transmission component is fixed below the top cover 2 and is used for driving the upper shading blades 8-1 to rotate to an opening position or a closing position by taking the corresponding rotating connection points as rotating centers respectively when receiving an opening or closing driving signal sent by the power management controller;
the lower transmission component is fixed above the bottom cover 13, and is used for driving the lower shading blades 8-2 to rotate to the opening position or the closing position by taking the corresponding rotation connecting points as rotation centers respectively when receiving opening or closing driving signals sent by the power management controller.
As an improvement of the device, an upper rotating shaft 9-1 is uniformly arranged between the blade supporting plate 10 and the upper transmission component; one end of the upper rotating shaft 9-1 is fixed on the blade supporting plate 10, and the other end of the upper rotating shaft passes through the positioning hole of the upper shading blade 8-1 to be fixedly connected with the upper transmission component, so that the upper shading blade 8-1 is rotatably connected with the blade supporting plate 10 by taking the upper rotating shaft 9-1 as a rotating center;
a lower rotating shaft 9-2 is uniformly arranged between the blade supporting plate 10 and the lower transmission component; one end of the lower rotating shaft 9-2 is fixed on the blade supporting plate 10, and the other end of the lower rotating shaft passes through the positioning hole of the lower shading blade 8-2 to be fixedly connected with the lower transmission assembly, so that the lower shading blade 8-2 is rotationally connected with the blade supporting plate 10 by taking the lower rotating shaft 9-2 as a rotating center; wherein,
the upper rotating shafts 9-1 and the lower rotating shafts 9-2 are alternately arranged in the same circle;
the blade supporting plate 10 is also provided with a supporting plate transmission groove near the fixed point of each upper rotating shaft 9-1 and each lower rotating shaft 9-2;
each upper shading blade 8-1 and each lower shading blade 8-2 are respectively provided with a blade transmission hole near the fixed point of the corresponding upper rotating shaft 9-1 or lower rotating shaft 9-2;
the upper transmission assembly and the lower transmission assembly comprise a plurality of cantilevers which respectively penetrate through the corresponding blade transmission holes and the corresponding support plate transmission grooves; when the upper transmission assembly and the lower transmission assembly receive an opening or closing driving signal sent by the power management controller, the upper shading blade 8-1 and the lower shading blade 8-2 are driven to rotate around the corresponding upper rotating shaft 9-1 or lower rotating shaft 9-2 through the cantilever, so that the upper shading blade 8-1 and the lower shading blade 8-2 move to an opening position or a closing position.
As an improvement of the above apparatus, the upper transmission assembly comprises: a plurality of upper circuit boards 3-1, a plurality of upper rotary electromagnets 5-1 and an upper pressure plate 6; wherein,
the upper circuit boards 3-1 are uniformly distributed around the upper pressing plate 6 and fixed above the upper pressing plate;
the upper rotary electromagnets 5-1 are arranged between the two upper circuit boards 3-1, fixed above the upper pressing plate 6 and connected with the corresponding circuit boards 3-1;
the upper pressing plate 6 is provided with a plurality of upper pressing plate transmission grooves; the transmission grooves of the upper pressing plate are the same as those of the support plate near the upper rotating shaft 9-1 in shape and correspond in position;
the upper rotary electromagnet 5-1 is also fixedly connected with the cantilever; the cantilever is driven by the upper rotating electromagnet 5-1, rotates around the axis of the upper rotating electromagnet 5-1, the tail end of the cantilever sequentially penetrates through the corresponding upper pressing plate transmission groove, the blade transmission hole and the supporting plate transmission groove, and drives the corresponding upper shading blade 8-1 to rotate through the blade transmission hole.
As an improvement of the above apparatus, the lower drive assembly comprises: a plurality of lower circuit boards 3-2, a plurality of lower rotary electromagnets 5-2 and a lower pressing plate 11; wherein,
the lower circuit boards 3-2 are uniformly distributed around the lower pressing plate 11 and fixed below the lower pressing plate;
the lower rotary electromagnets 5-2 are arranged between the two lower circuit boards 3-2, fixed below the lower pressing plate 11 and connected with the corresponding lower circuit boards 3-2;
the lower pressing plate 11 is provided with a plurality of lower pressing plate transmission grooves; the transmission grooves of the lower pressing plates have the same shape as the transmission grooves of the supporting plate near the lower rotating shaft 9-2 and correspond to the positions of the transmission grooves;
the lower rotary electromagnet 5-2 is fixedly connected with a cantilever, the cantilever is driven by the lower rotary electromagnet 5-2 to rotate around the axis of the lower rotary electromagnet 5-2, the tail end of the cantilever sequentially penetrates through the corresponding lower pressing plate transmission groove, the corresponding blade transmission hole and the corresponding support plate transmission groove, and the corresponding lower shading blade 8-2 is driven to rotate through the blade transmission hole.
As a modification of the above apparatus, the upper platen 6 and the lower platen 11 are provided at their outer edges with flanges; the flange of the upper pressure plate 6 and the flange of the lower pressure plate 11 are oppositely arranged and are compressed and fixed through screws;
a plurality of supporting columns 12 are arranged between the top cover 2 and the upper pressing plate 6, and two ends of each supporting column are respectively fixedly connected with the top cover 2 and the upper pressing plate 6;
a plurality of support columns 12 are arranged between the lower pressing plate 11 and the bottom cover 13, and two ends of the support columns are respectively fixedly connected with the lower pressing plate 11 and the bottom cover 13.
As shown in fig. 12, after receiving a shutter operation command from the upper computer, the power management controller retrieves a preset value of a driving voltage based on a shutter operation command state, controls the DA converters and the amplification circuits of the upper circuit board 3-1 and the lower circuit board 3-2 to generate a working voltage matching the preset value of the driving voltage, and loads the working voltage to the corresponding upper rotary electromagnet 5-1 or the corresponding lower rotary electromagnet 5-2. The shutter is controlled by a uniform control signal to drive a plurality of shading blades to synchronously act and open or close. The shutter is opened, namely the light through hole is completely opened, all the shading blades move to the position of the frame containing area, the shutter is closed, namely the light through hole is completely covered, all the shading blades move to the position of the central through hole, all the shading blades act in the same way, the movement time is the same, and the shutter effect is the same. By applying proper torque to the blades, the change of the required torque of the shading blades caused by physical difference and environmental temperature is adjusted in time, so that the action consistency is better.
When the rotating electromagnet drives the blades to rotate, the shading blades can apply a counter-acting force to the rotating electromagnet, and a counter-electromotive force is formed on the rotating electromagnet. And judging whether the blades need to adjust the driving power or not by detecting the change of the counter electromotive force, and adjusting the voltage according to the requirement. As shown in fig. 13, the power management controller is further configured to read a current Ii of each of the upper rotary electromagnet 5-1 and the lower rotary electromagnet 5-2, and determine whether the read current Ii matches a preset value Vf of the driving voltage, wherein when the read current Ii is equal to a standard current value If, it is determined that there is a match;
if the driving voltage is matched with the preset value Vf of the driving voltage, the power management controller saves the current preset value Vf of the driving voltage;
if the current Ii is not matched with the standard current value If, replacing the current preset value of the driving voltage by the power management controller after subtracting a fixed voltage variation quantity delta V from the current preset value Vf of the driving voltage, repeating the step until the read current Ii is equal to the standard current value If, and storing the current preset value Vf of the driving voltage;
if the current Ii is not matched with the standard current value If, replacing the current preset value Vf of the driving voltage by the power management controller after adding the fixed voltage variation quantity DeltaV to the current preset value Vf of the driving voltage, repeating the matching step until the read current Ii is equal to the standard current value If, and storing the current preset value Vf of the driving voltage;
and the standard current value If is the current value of the upper rotating electromagnet 5-1 or the lower rotating electromagnet 5-2 under the condition that the driving voltage preset value Vf is matched.
When the shutter comprises a plurality of rotary shutter parts, the adjacent rotary shutter parts are fixedly connected through screws.
The materials of the top cover 2 and the bottom cover 13 comprise: a light metal material.
The materials of the upper shading blade 8-1 and the lower shading blade 8-2 comprise: stainless steel.
The components are described below:
1. first countersunk screw 1: the long screws for fixing the top cover 2 fix the top cover 2 on the upper pressure plate 6 through the support of the support columns 12.
2. The top cover 2: as shown in fig. 4, the top cover 2 is a cover of the shutter for covering the circuits and parts inside the shutter for protection.
3. Upper circuit board 3-1 and lower circuit board 3-2: in the embodiment, 6 upper circuit boards 3-1 and 6 lower circuit boards 3-2 are adopted in the circuit for driving the blades to move, and are respectively and uniformly distributed and fixed on the upper pressing plate 6 and the lower pressing plate 11 through pan head screws 4.
4. Pan head screw 4: short screws for fixing the upper circuit board 3-1 and the lower circuit board 3-2; in this embodiment, each circuit board needs four pan head screws 4 for fixing.
5. An upper rotary electromagnet 5-1 and a lower rotary electromagnet 5-2: the present embodiment includes 6 upper rotary electromagnets 5-1 and 6 lower rotary electromagnets 5-2 for respectively powering the upper light-shielding blade 8-1 and the lower light-shielding blade 8-2, and as shown in fig. 5, each rotary electromagnet has a cantilever capable of rotating 53 degrees and drives the upper light-shielding blade 8-1 and the lower light-shielding blade 8-2 to rotate around the corresponding upper rotary shaft 9-1 or the corresponding lower rotary shaft 9-2 through the cantilever.
6. An upper pressure plate 6: for fixedly supporting the shading blade 8 and installing and fixing the upper circuit board 3-1, as shown in fig. 6, the hole site a on the upper press plate 6 comprises 4 threaded holes for installing pan head screws 4; the 6 hole sites B are used for installing the rotary electromagnet 5-1. The shape of the hole B is consistent with the bottom shape of the upper rotary electromagnet 5-1, the size is slightly smaller, and the rotary electromagnet 5 can be clamped into the hole for fixing; the hole C is used for installing a support column 12 between the blade support frame 10 and the top cover 2; hole site D is for mounting a second countersunk screw 7.
7. Second countersunk screw 7: screws fastening the upper platen 6 and the lower platen 11 together.
8. Upper and lower shade blades 8-1 and 8-2: in the embodiment, 6 upper shading blades 8-1 and 6 lower shading blades 8-2 are made of stainless steel materials. Because of the large size of the blades, thin stainless steel can achieve sufficient mechanical strength to keep it from bending and deforming during movement, and other opaque materials, if sufficient mechanical strength, can be substituted. Two holes are formed in the upper shading blade 8-1 and the lower shading blade 8-2, as shown in fig. 7, the upper rotating shaft 9-1 or the lower rotating shaft 9-2 penetrates through the hole E, and the cantilever penetrates through the hole F, namely the blade transmission hole.
9. Upper 9-1 and lower 9-2: around which the shade blade rotates.
10. The blade support plate 10: for rotatably connecting the shading blades 8, there are 6 holes for fixing the upper rotating shaft 9-1 and 6 holes for fixing the lower rotating shaft 9-2, as shown in fig. 8. Wherein, the second countersunk head screw 7 passes through the hole G, and the two sections of the second countersunk head screw are respectively connected with the upper pressing plate 6 and the lower pressing plate 11; the hole position H is used for fixing the upper rotating shaft 9-1 or the lower rotating shaft 9-2; the slot I is a supporting plate transmission slot and is used for placing a cantilever, namely the cantilever fixed with the rotary electromagnet penetrates through the supporting plate transmission slot, and the cantilever can move along the track of the supporting plate transmission slot to drive the blade to be opened or closed. The total 12 shading blades are arranged and fixed on the blade supporting plate in two layers, wherein 6 upper shading blades 8-1 are arranged above the blade supporting plate, and 6 lower shading blades 8-2 are arranged below the blade supporting plate.
11. The lower pressure plate 11: as shown in fig. 9, the lower platen 11 is constructed in the same manner as the upper platen 6, except in the opposite direction.
12. Support column 12: as shown in fig. 10, between the top cover 2 and the upper platen 6, and between the lower platen and the bottom cover.
13. Bottom cover 13: the top cover 2 is used for the same purpose, and the appearance design is basically the same, except that a layer of screw thread is added on the bottom cover 13 for the connection of the shutter and the camera. As shown in fig. 11. The top cover and the bottom cover can be made of any hard solid material, and a light metal material such as aluminum is preferably used. This is because the internal drive circuit of the shutter includes a rotary electromagnet, which is likely to cause electromagnetic interference with the external environment during operation, and the housing made of a metal material can shield such interference. The use of lightweight materials helps to reduce overall weight.
From the above description, it can be seen that, in the electromagnetic mechanical shutter with a rotating blade structure provided by the present invention, a unique multilayer light-shielding blade structure is adopted to replace a traditional single-layer light-shielding blade structure, a total light-shielding surface is shared by multiple light-shielding blade layers, and the blade layers of the shutter share the same storage area, so that the opening-closing ratio of the shutter reaches 0.48, and the shutter can obtain a larger blade storage space under the condition of no change of the cross section, so that the shutter can obtain a larger light aperture than the prior art under the condition of not increasing the blade storage space, thereby forming a larger and narrower shutter, and facilitating obtaining a larger shutter light aperture.
The invention also adopts a unique blade driving mode of 'centralized control distributed driving'. The centralized control means that a synchronous signal is used to control the action of all the rotary electromagnets to make the action of all the blades be consistent. Specifically, the power management controller is used for responding to a shutter action command and controlling the circuit boards to generate driving voltage so as to drive the corresponding rotary electromagnets to rotate simultaneously. The distributed driving is that each blade is driven by a separate rotary electromagnet, the power of the blade can be finely adjusted, the problem of inconsistent power required by the blades due to physical and environmental differences is solved, the continuity of opening and closing of the blades is kept, the vibration is smaller, and the shutter control device is beneficial to obtaining higher shutter action precision.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. An electromagnetic mechanical shutter of a rotary blade structure, comprising: a top cover (2), a rotary shutter member, a bottom cover (13), and a power management controller, wherein the shutter comprises: at least one rotary shutter member; wherein,
the rotary shutter member is disposed between the top cover (2) and the bottom cover (13), and includes: the shading device comprises an upper transmission component, a plurality of upper shading blades (8-1), a blade supporting plate (10), a plurality of lower shading blades (8-2) and a lower transmission component; wherein,
the blade supporting plate (10) is annular, and one ends of the upper shading blades (8-1) are uniformly distributed above the blade supporting plate (10) and close to the outer edge and are rotatably connected with the blade supporting plate; one end of each lower shading blade (8-2) is uniformly distributed below the blade supporting plate (10) and close to the outer edge, and is rotatably connected with the blade supporting plate; wherein,
the rotating connection points of the upper shading blades (8-1) and the blade support plate (10) and the rotating connection points of the lower shading blades (8-2) and the blade support plate (10) are alternately arranged at the same circumference;
the power management controller is used for synchronously sending an opening or closing driving signal to the upper transmission assembly and the lower transmission assembly;
the upper transmission component is fixed below the top cover (2) and is used for driving the upper shading blades (8-1) to rotate to an opening position or a closing position by taking the corresponding rotating connection points as rotating centers when receiving an opening or closing driving signal sent by the power management controller;
the lower transmission assembly is fixed above the bottom cover (13) and is used for driving the lower shading blades (8-2) to rotate to an opening position or a closing position by taking the corresponding rotating connection points as rotating centers when receiving an opening or closing driving signal sent by the power management controller;
the upper transmission assembly comprises: a plurality of upper circuit boards (3-1), a plurality of upper rotary electromagnets (5-1) and an upper pressure plate (6); wherein,
the upper circuit boards (3-1) are uniformly distributed around the upper pressure plate (6) and are fixed above the upper pressure plate;
the upper rotary electromagnets (5-1) are arranged between the two upper circuit boards (3-1), fixed above the upper pressure plate (6) and connected with the corresponding circuit boards (3-1);
the upper pressing plate (6) is provided with a plurality of upper pressing plate transmission grooves; the transmission grooves of the upper pressing plate are the same as those of the supporting plate near the upper rotating shaft (9-1) in shape and correspond to the positions of the transmission grooves;
the upper rotary electromagnet (5-1) is also fixedly connected with the cantilever; the cantilever is driven by the upper rotary electromagnet (5-1) to rotate around the axis of the upper rotary electromagnet (5-1), the tail end of the cantilever sequentially penetrates through the corresponding upper pressing plate transmission groove, the blade transmission hole and the supporting plate transmission groove, and the corresponding upper shading blade (8-1) is driven to rotate through the blade transmission hole;
the lower transmission assembly comprises: a plurality of lower circuit boards (3-2), a plurality of lower rotary electromagnets (5-2) and a lower pressing plate (11); wherein,
the lower circuit boards (3-2) are uniformly distributed around the lower pressing plate (11) and are fixed below the lower pressing plate;
the lower rotary electromagnets (5-2) are arranged between the two lower circuit boards (3-2), fixed below the lower pressing plate (11) and connected with the corresponding lower circuit boards (3-2);
the lower pressing plate (11) is provided with a plurality of lower pressing plate transmission grooves; the lower pressing plate transmission grooves are the same as the support plate transmission grooves near the lower rotating shaft (9-2) in shape and correspond in position;
the lower rotary electromagnet (5-2) is fixedly connected with a cantilever, the cantilever is driven by the lower rotary electromagnet (5-2) to rotate around the axis of the lower rotary electromagnet (5-2), the tail end of the cantilever sequentially penetrates through the corresponding lower pressing plate transmission groove, the corresponding blade transmission hole and the corresponding support plate transmission groove, and the corresponding lower shading blade (8-2) is driven to rotate through the blade transmission hole;
the upper shading blade (8-1) and the lower shading blade (8-2) are in a shape of a notch banana.
2. The rotary blade structured electromagnetic mechanical shutter according to claim 1,
an upper rotating shaft (9-1) is uniformly arranged between the blade supporting plate (10) and the upper transmission assembly; one end of the upper rotating shaft (9-1) is fixed on the blade supporting plate (10), and the other end of the upper rotating shaft penetrates through the positioning hole of the upper shading blade (8-1) to be fixedly connected with the upper transmission assembly, so that the upper shading blade (8-1) is rotatably connected with the blade supporting plate (10) by taking the upper rotating shaft (9-1) as a rotating center;
a lower rotating shaft (9-2) is uniformly arranged between the blade supporting plate (10) and the lower transmission assembly; one end of the lower rotating shaft (9-2) is fixed on the blade supporting plate (10), and the other end of the lower rotating shaft penetrates through the positioning hole of the lower shading blade (8-2) to be fixedly connected with the lower transmission assembly, so that the lower shading blade (8-2) is rotationally connected with the blade supporting plate (10) by taking the lower rotating shaft (9-2) as a rotating center; wherein,
the upper rotating shafts (9-1) and the lower rotating shafts (9-2) are alternately arranged in the same circumference;
a supporting plate transmission groove is further formed in the blade supporting plate (10) near the fixed point of each upper rotating shaft (9-1) and each lower rotating shaft (9-2);
each upper shading blade (8-1) and each lower shading blade (8-2) are respectively provided with a blade transmission hole near the fixed point of the corresponding upper rotating shaft (9-1) or the corresponding lower rotating shaft (9-2);
the upper transmission assembly and the lower transmission assembly comprise a plurality of cantilevers which respectively penetrate through the corresponding blade transmission holes and the corresponding support plate transmission grooves; when the upper transmission assembly and the lower transmission assembly receive opening or closing driving signals sent by the power management controller, the upper shading blade (8-1) and the lower shading blade (8-2) are driven to rotate around the corresponding upper rotating shaft (9-1) or lower rotating shaft (9-2) through the cantilever, and the upper shading blade (8-1) and the lower shading blade (8-2) are moved to an opening position or a closing position.
3. Electromagnetic mechanical shutter of rotary blade construction according to claim 1, characterized in that the upper platen (6) and the lower platen (11) are provided with flanges at their outer edges; the flange of the upper pressure plate (6) and the flange of the lower pressure plate (11) are oppositely arranged and are compressed and fixed through screws;
a plurality of supporting columns 12 are arranged between the top cover (2) and the upper pressing plate (6), and two ends of the supporting columns are respectively fixedly connected with the top cover (2) and the upper pressing plate (6);
a plurality of supporting columns 12 are arranged between the lower pressing plate (11) and the bottom cover (13), and two ends of each supporting column are fixedly connected with the lower pressing plate (11) and the bottom cover (13) respectively.
4. The electromagnetic mechanical shutter of rotary blade structure according to claim 1, wherein the power management controller, after receiving a shutter operation command from an upper computer, retrieves a preset value of a driving voltage based on a state of the shutter operation command, controls the DA converter and the amplifying circuit of each of the upper circuit board (3-1) and the lower circuit board (3-2) to generate an operating voltage matching the preset value of the driving voltage, and applies the operating voltage to the corresponding upper rotary electromagnet (5-1) or the corresponding lower rotary electromagnet (5-2).
5. The electromagnetic mechanical shutter of rotary blade structure according to claim 4, wherein said power management controller is further configured to read a current Ii of each of said upper rotary electromagnet (5-1) and lower rotary electromagnet (5-2), and determine whether the read current Ii matches a preset value Vf of said driving voltage, wherein the read current Ii is considered to match when it is equal to a standard current value If;
if the driving voltage is matched with the preset value Vf of the driving voltage, the power management controller saves the current preset value Vf of the driving voltage;
if not, when the read current Ii is larger than a standard current value If, replacing the current preset value of the driving voltage by the power management controller after subtracting a fixed voltage variation quantity delta V from the current preset value Vf of the driving voltage, and repeating the steps until the read current Ii is equal to the standard current value If, and storing the current preset value Vf of the driving voltage;
if the current Ii is not matched with the standard current value If, replacing the current preset value Vf of the driving voltage by the power management controller after adding the fixed voltage variation quantity DeltaV to the current preset value Vf of the driving voltage, repeating the matching step until the read current Ii is equal to the standard current value If, and storing the current preset value Vf of the driving voltage;
and the standard current value If is the current value of the upper rotating electromagnet (5-1) or the lower rotating electromagnet (5-2) under the condition that the driving voltage preset value Vf is matched.
6. The rotary blade electromagnetic mechanical shutter according to claim 1, wherein when the shutter includes a plurality of rotary shutter members, adjacent rotary shutter members are fixedly connected by screws.
7. Electromagnetic mechanical shutter of rotary blade construction, according to claim 1, characterized in that the material of the top cover (2) and bottom cover (13) comprises: a light metal material.
8. The electromagnetic mechanical shutter of rotary blade structure according to claim 1, wherein the material of the upper and lower shade blades (8-1, 8-2) comprises: stainless steel.
CN202210121051.4A 2022-02-09 2022-02-09 Electromagnetic mechanical shutter with rotating blade structure Active CN114911113B (en)

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CN202210121051.4A CN114911113B (en) 2022-02-09 2022-02-09 Electromagnetic mechanical shutter with rotating blade structure

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CN114911113B true CN114911113B (en) 2023-04-18

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5745814A (en) * 1995-05-29 1998-04-28 Nikon Corporation Camera lens shutter unit having a structure which reduces the shutter unit thickness
JPH0922044A (en) * 1995-07-04 1997-01-21 Canon Inc Shutter device for camera
US8333521B2 (en) * 2010-04-01 2012-12-18 Va, Inc. Shutter assembly with rotating magnet
WO2021097793A1 (en) * 2019-11-22 2021-05-27 深圳市大疆创新科技有限公司 Shutter and imaging device
CN213876260U (en) * 2020-12-29 2021-08-03 深圳市大疆创新科技有限公司 Shutter device and photographing apparatus having the same

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