CN112335225B

CN112335225B - Shutter and imaging device

Info

Publication number: CN112335225B
Application number: CN201980040928.3A
Authority: CN
Inventors: 白龙吉; 黄通尧; 朱聪聪; 薛光怀; 范岩峰
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2022-04-08
Anticipated expiration: 2039-11-22
Also published as: CN112335225A; WO2021097793A1

Abstract

The present invention provides a shutter and an imaging apparatus, the shutter including: the shutter comprises a first mounting plate, a synchronizing ring, a plurality of first blades and a plurality of driving devices, wherein a shutter opening is formed in the first mounting plate, the plurality of first blades are arranged around the shutter opening, and each first blade is rotatably connected with the first mounting plate; the plurality of driving devices are arranged around the shutter opening, each driving device is in transmission connection with the synchronizing ring, and the synchronizing rings are in transmission connection with the first blades respectively. Each driving device simultaneously drives the synchronous ring to transmit, so as to drive each first blade to rotate, and thus the opening or closing of the shutter opening is realized; compared with the method that only one driving device is arranged, the power and the volume of a single driving device are reduced, and meanwhile the integral output of the driving device is enhanced, so that the torque of the synchronizing ring is increased, the rotating speed of the synchronizing ring and the first blade is increased, and finally the opening and closing speed of the shutter is increased.

Description

Shutter and imaging device

Technical Field

The embodiment of the invention relates to the technology of imaging equipment, in particular to a shutter and an imaging device.

Background

An imaging device such as a camera generally has a shutter for controlling an exposure amount of the imaging device, and therefore, the quality of the shutter directly affects the imaging quality of the imaging device.

The shutter usually requires a corresponding drive means to complete its opening and closing, which drive means are usually mounted outside the shutter opening.

However, the space outside the shutter opening is limited, the number and size of the driving devices are limited, insufficient driving force is easily caused, and the speed of opening and closing the shutter is slow.

Disclosure of Invention

In order to overcome the above-mentioned defects in the prior art, an object of the present invention is to provide a shutter and an imaging apparatus, which can increase the driving force of the synchronizing ring, further increase the rotation speed of the synchronizing ring and the first blade, and increase the opening and closing speed of the shutter.

An embodiment of the present invention provides a shutter, including: the shutter comprises a first mounting plate, a synchronizing ring, a plurality of first blades and a plurality of driving devices, wherein a shutter opening is formed in the first mounting plate, the plurality of first blades are arranged around the shutter opening, and each first blade is rotatably connected with the first mounting plate; the plurality of driving devices are arranged around the shutter opening, each driving device is in transmission connection with the synchronizing ring, and the synchronizing rings are in transmission connection with the first blades respectively.

The embodiment of the invention also provides an imaging device, which comprises a photosensitive element and a shutter, wherein the shutter controls the light inlet time of the photosensitive element; the shutter includes: the shutter comprises a first mounting plate, a synchronizing ring, a plurality of first blades and a plurality of driving devices, wherein a shutter opening is formed in the first mounting plate, the plurality of first blades are arranged around the shutter opening, and each first blade is rotatably connected with the first mounting plate; the plurality of driving devices are arranged around the shutter opening, each driving device is in transmission connection with the synchronizing ring, and the synchronizing rings are in transmission connection with the first blades respectively.

According to the shutter and the imaging device provided by the embodiment of the invention, each driving device simultaneously drives the synchronous ring to transmit, so that each first blade is driven to rotate, and the opening or closing of the shutter opening is realized; compared with the method that only one driving device is arranged, the power and the volume of a single driving device are reduced, and meanwhile the integral output of the driving device is enhanced, so that the torque of the synchronizing ring is increased, the rotating speed of the synchronizing ring and the first blade is increased, and finally the opening and closing speed of the shutter is increased. By the arrangement, the volume, particularly the radial length, of the shutter can be further compressed, and the variation range of the shutter speed is larger.

Drawings

Fig. 1 is a schematic structural diagram of a first viewing angle of a shutter according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating a second view of the shutter according to the embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a first view angle of connection between driving devices in the shutter according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a second view angle of the connection between the driving devices in the shutter according to the embodiment of the present invention;

FIG. 5 is an exploded view of various driving devices in the shutter according to the embodiment of the present invention;

FIG. 6 is an exploded view of an electromagnet in a shutter according to an embodiment of the present invention;

FIG. 7 is an exploded view of a magnet, a shaft, and a drive rod of the shutter according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a second mounting plate of the shutter according to an embodiment of the present invention;

fig. 9 is an exploded view of the first mounting plate, the second mounting plate and the fixing plate of the shutter according to the embodiment of the present invention;

FIG. 10 is a schematic view of the connection between the synchronizing ring and the first mounting plate in the shutter according to the embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a driving pin connected to a synchronizing ring via a driving link in a shutter according to an embodiment of the present invention;

fig. 12 is an exploded view of the synchronizing ring, the retainer ring, the first mounting plate and the blade assembly of the shutter according to the present invention;

FIG. 13 is an exploded view of a blade assembly in a shutter according to an embodiment of the present invention;

FIG. 14 is a schematic diagram illustrating the position of the synchronization ring when the shutter opening is opened in the shutter according to the embodiment of the present invention;

FIG. 15 is a schematic diagram illustrating the position of a blade assembly when a shutter opening in a shutter according to an embodiment of the present invention is open;

FIG. 16 is a schematic view of the position of the synch ring with the blade assembly moved to a first position between the shutter opening and closing according to an embodiment of the present invention;

FIG. 17 is a schematic diagram illustrating the position of a blade assembly in a shutter according to an embodiment of the present invention as the blade assembly moves to a first position between the open and closed shutter openings;

FIG. 18 is a schematic view of the position of the synch ring with the blade assembly moved to a second position between the shutter opening and closing according to embodiments of the present invention;

FIG. 19 is a schematic diagram illustrating the position of a blade assembly in a shutter according to an embodiment of the present invention when the blade assembly is moved to a second position between the open and closed shutter openings;

FIG. 20 is a schematic diagram illustrating the position of the synchronizer ring when the electromagnet is de-energized during the movement of the blade assembly from the shutter opening to the shutter opening in the shutter according to the embodiment of the present invention;

fig. 21 is a schematic position diagram of a blade assembly in a shutter according to an embodiment of the present invention when an electromagnet is powered off during a motion from a shutter opening to a shutter opening of the blade assembly;

FIG. 22 is a schematic diagram illustrating the position of the synch ring when the blades stop during movement from the shutter opening to the shutter opening in the shutter according to an embodiment of the present invention;

FIG. 23 is a schematic diagram illustrating the position of a blade assembly when the blade assembly stops during the movement from shutter opening to shutter opening of the shutter in the shutter according to the embodiment of the present invention;

FIG. 24 is a front view of a synchronizer ring in a shutter according to an embodiment of the present invention;

FIG. 25 is a side view of a synchronizer ring in a shutter according to an embodiment of the present invention;

FIG. 26 is a rear view of a synch ring in a shutter according to an embodiment of the present invention;

FIG. 27 is a schematic view showing the configuration of a shutter in which the rotation axes of the first blade and the second blade are located on different straight lines in the embodiment of the present invention;

FIG. 28 is a schematic view showing the installation of each driving device in the shutter in which the rotation axes of the first blade and the second blade are located on different straight lines according to the embodiment of the present invention;

fig. 29 is an exploded view of each driving device in the shutter in which the rotational axes of the first blade and the second blade are located on different straight lines in the embodiment of the present invention;

FIG. 30 is a schematic view of the positions of the blade assemblies when the shutter openings in the shutter are open in which the axes of rotation of the first and second blades are in different lines according to the embodiment of the present invention;

FIG. 31 is a schematic view of the configuration of the embodiment of the present invention in which the rotation axes of the first blade and the second blade are located on different straight lines, in the shutter in which the blade assembly is moved to the first position between the opening and closing of the shutter opening;

FIG. 32 is a schematic view of the configuration of the embodiment of the present invention in which the rotation axes of the first blade and the second blade are located on different straight lines, in the shutter in which the blade assembly is moved to the second position between the opening and closing of the shutter opening;

FIG. 33 is a schematic view of the position of the blade assembly when the electromagnets of the shutter are de-energized in an embodiment of the present invention in which the axes of rotation of the first and second blades are in different lines;

fig. 34 is a schematic view of a shutter in which the rotation axes of the first blade and the second blade are located on different straight lines in the embodiment of the present invention when the blade assembly is stopped.

Description of reference numerals:

10: a first mounting plate;

20: a synchronizer ring;

30: a blade assembly;

40: a drive device;

50: a second mounting plate;

60: a fixing plate;

101: a shutter opening;

102: a limiting ring;

103: a limiting groove;

201: a drive pin hole;

202: a first drive shaft;

203: a second drive shaft;

204: a limiting bulge;

301: a first blade:

302: a second blade;

303: a reinforcing sheet;

304: a separator;

305: a second acceleration zone;

306: rotating the pin shaft;

401: an electromagnet;

402: a magnet;

403: a coil;

404: an iron core;

405: a rotating shaft;

406: a drive rod;

407: driving the pin shaft;

408: a top seat;

409: the connecting rod is driven.

501: a light through hole;

502: a base;

601: a light-through port;

3011: a first drive aperture;

3021: a second drive aperture;

4021: a drive card slot;

4041: an arc-shaped slot;

4042: a protective sleeve;

4043: a stop surface;

4051: and driving the fixture block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 9, the present embodiment provides a shutter, including: the shutter comprises a first mounting plate 10, a synchronizing ring 20, a plurality of first blades 301 and a plurality of driving devices 40, wherein the first mounting plate 10 is provided with a shutter opening 101, the plurality of first blades 301 are arranged around the shutter opening 101, and each first blade 301 is rotatably connected with the first mounting plate 10; a plurality of driving devices 40 are arranged around the shutter opening 101, each of the driving devices 40 is in driving connection with the synchronizing ring 20, and the synchronizing ring 20 is in driving connection with each of the first blades 301. With the above arrangement, the synchronizing ring 20 can be driven to rotate by each driving device 40, and each first blade 301 can be further driven to rotate when the synchronizing ring 20 rotates, so that the power and the volume of a single driving device are reduced, uniform output of torque is realized, and uniform opening and closing of shutter blades are driven.

In this embodiment, the first mounting plate 10 is provided with a shutter opening 101, the plurality of first blades 301 are disposed around the shutter opening 101, and by rotating the respective blades into the shutter opening 101, the respective first blades 301 collectively cover the shutter opening 101, so as to close the shutter opening 101; in contrast, by rotating each first blade 301 outward of the shutter opening 101, each first blade 301 is separated from the shutter opening 101 to effect opening of the shutter opening 101. The number of the first blades 301 is not limited in the present embodiment, and the number of the exemplary first blades 301 may be 3, 4, 5, etc., wherein 5 first blades 301 have the optimal optical performance; the plurality of first blades 301 may be disposed at equal intervals to achieve uniform opening and closing of the shutter.

Specifically, the rotatable connection between the first blade 301 and the first mounting plate 10 may be various, for example, a rotation shaft may be disposed on the first blade 301, and correspondingly, a rotation hole is disposed on the first mounting plate 10, and the rotation shaft is disposed in the rotation hole in a penetrating manner, so as to implement the rotatable connection between the first blade 301 and the first mounting plate 10. The form that the rotating shaft is arranged on the first mounting plate 10 and the rotating hole is arranged on the first blade 301 can better ensure the rotating stability of the first blade 301, so that the consistency of opening and closing of the shutter is better in use, and the descending amplitude of the shutter speed after multiple times of opening and closing is reduced.

The synchronizing ring 20 is rotatably arranged on the first mounting plate 10, and the axis of the synchronizing ring 20 is coincident with the central line of the shutter opening 101; specifically, an annular groove may be provided on the first mounting plate 10, a center line of the annular groove coincides with a center line of the shutter opening 101, and the synchronizing ring 20 is slidably provided in the annular groove so that the synchronizing ring 20 can rotate in the annular groove; of course, an annular limit flange may be disposed on the first mounting plate 10, and a center line of the annular limit flange is collinear with a center line of the shutter opening 101, and the synchronizing ring 20 is sleeved on the annular limit flange, so that the synchronizing ring 20 can rotate on the annular limit flange. In particular, the manner of slidably disposing the synchronizing ring 20 in the annular groove enables the synchronizing ring 20 to perform corresponding functions in cooperation with other components such as a stopper while further reducing the radial length of the shutter. It should be noted that the synchronizing ring 20 and each first blade 301 may be disposed on the same side of the first mounting plate 10, but the synchronizing ring 20 may also be disposed on one side of the first mounting plate 10, and each first blade 301 may be disposed on the other side of the first mounting plate 10, which is not limited in this embodiment. When the synchronizer ring 20 is disposed at one side of the first mounting plate 10 while the respective first blades 301 are disposed at the other side of the first mounting plate 10, a window may be provided on the first mounting plate 10 to facilitate the connection between the synchronizer ring 20 and the respective first blades 301. Through the arrangement, the mechanical interference between the synchronizing ring 20 and the first blades 301 can be avoided while the synchronizing ring 20 drives the first blades 301 to open and close. The synchronizing ring 20 is in transmission connection with each first blade 301, so that each first blade 301 is driven to rotate synchronously when the synchronizing ring 20 rotates, and the synchronism of the movement of each first blade 301 is ensured.

The driving device 40 comprises a magnet 402 and electromagnets 401, the electromagnets 401 of the plurality of driving devices 40 are arranged around the shutter opening 101, and the electromagnets 401 are electrically connected in series; the magnet 402 of each driving device 40 is arranged between two adjacent electromagnets 401 and is in transmission connection with the synchronizing ring 20, and the magnet 402 can rotate under the action of the magnetic fields generated by the two adjacent electromagnets 401.

In this embodiment, the electromagnets 401 of the plurality of driving devices 40 are disposed around the shutter opening 101 at intervals, and the electromagnets 401 are electrically connected in series, and the magnet 402 of each driving device 40 is disposed between two adjacent electromagnets 401; meanwhile, power is supplied to each electromagnet 401, so that a magnetic field can be generated between two adjacent electromagnets 401, and the magnets 402 are driven to rotate under the action of the magnetic field; each magnet 402 is in transmission connection with the synchronizing ring 20, and each magnet 402 simultaneously drives the synchronizing ring 20 to rotate, so as to drive each first blade 301 to rotate, so as to open or close the shutter opening 101; the magnets 402 of the plurality of driving means 40 rotate simultaneously, increasing the driving force of the synchronizer ring 20, and thus increasing the rotational speed of the first blades 301, so that the shutter opening 101 can be rapidly opened and closed.

The present embodiment does not limit the number of the driving devices 40, and the following are exemplary: the number of drive means 40 may be 3, 4, 5, etc. The plurality of driving devices 40 may be disposed at equal intervals. Specifically, the first blades 301 correspond one-to-one to the driving devices 40; one driving device 40 is provided for each first blade 301 to ensure sufficient power for the shutter. Further, the axis of the synchronizer ring 20 is made to coincide with the center line of the shutter opening 101, so that the output of the synchronizer ring 20 can be ensured to act uniformly on each shutter blade, and uniform opening and closing of the shutter opening can be realized. In addition, each magnet 402 is in driving connection with the synchronizer ring 20, and can balance the torque of each electromagnet.

The working process of the shutter provided by the embodiment is as follows: when the shutter opening 101 is closed, a forward current is input to each electromagnet 402 connected in series, at this time, a magnetic field is formed between the adjacent electromagnets 401, and then each magnet 402 is driven to rotate in a preset direction, the synchronizing ring 20 connected to each magnet 402 in a transmission manner is driven to rotate in a forward direction, and then each first blade 301 positioned on the outer side of the shutter opening 101 is driven to rotate towards the shutter opening 101 until the shutter opening 101 is closed; when the shutter opening 101 is opened, a reverse current is input to each electromagnet 402 connected in series, at this time, a magnetic field is formed between the adjacent electromagnets 401, and then each magnet 402 is driven to rotate in a reverse direction of a preset direction, the synchronizing ring 20 which is connected to each magnet 402 in a transmission manner is driven to rotate in a reverse direction, and then each first blade 301 located in the shutter opening 101 is driven to rotate towards the outside of the shutter opening 101 until the shutter opening 101 is opened.

In the shutter provided by the embodiment, the first mounting plate 10 is provided with a shutter opening 101, a plurality of first blades 301 are arranged around the shutter opening 101, and each first blade 301 is rotatably connected with the first mounting plate 10; the synchronizing ring 20 is rotatably arranged on the first mounting plate 10, the rotation axis of the synchronizing ring 20 is overlapped with the central line of the shutter opening 101, and the synchronizing ring 20 is in transmission connection with each first blade 301; the plurality of driving devices 40 are arranged around the shutter opening, the electromagnet 401 of each driving device 40 is arranged around the shutter opening 101, and the electromagnets 401 are electrically connected in series; the magnet 402 of each driving device 40 is arranged between two adjacent electromagnets 401, and each magnet 402 is in transmission connection with the synchronizing ring 20; when the power is on, the electromagnets 401 are electrified simultaneously, so that the magnets 402 rotate, and the magnets 402 drive the synchronizing ring 20 to transmit power simultaneously, so as to drive the first blades 301 to rotate, thereby opening or closing the shutter opening 101; compared with the case where only one driving device is provided, the driving force of the synchronizing ring 20 is increased, and thus the rotational speed of the synchronizing ring 20 and the first blades 301 is increased, and the shutter opening and closing speed is increased.

With continued reference to fig. 2-9, in the present embodiment, the electromagnet 401 includes cores 404 and coils 403, a plurality of cores 404 are disposed at intervals around the shutter opening 101, each magnet 402 is disposed between two adjacent cores 404, and each core 404 is wound with a coil 403. The iron core 404 can enhance the inductance and increase the magnetic field strength between two adjacent electromagnets 401, thereby increasing the rotation torque of the magnets 402.

Specifically, a plurality of cores 404 are disposed around the shutter opening 101, and the cores 404 may have an arc shape, and the center of the core 404 is located on the center line of the shutter opening 101.

In this embodiment, the iron core 404 may be sleeved with a protective sheath 4042, and the coil 403 is wound around the outer side of the protective sheath 4042; protective sheath 4042 may prevent coil 403 from directly contacting ferrite core 404. Further, the protective sheath 4042 is provided with stop surfaces 4043 at both ends thereof, and the coil 403 is sandwiched between the two stop surfaces 4043, so that the coil 403 is prevented from being separated from the protective sheath 4042. In order to facilitate the installation between protective sheath 4042 and the iron core 404, protective sheath 4042 can include first protective sheath and second protective sheath, all is provided with the iron core groove on first protective sheath and the second protective sheath, and first protective sheath 4042 and the laminating of second protective sheath 4042 to make two iron core grooves enclose and establish into the hole that is used for holding iron core 404.

With continued reference to fig. 4-6, specifically, each core 404 is provided with an arcuate slot 4041 at each end, and the two opposing arcuate slots 4041 enclose a cavity that receives the magnet 402. The arcuate slots 4041 concentrate the magnetic field within the cavity, thereby increasing the rotational torque of the magnet 402.

Further, the driving device 40 may have a power-off self-locking function, that is, the electromagnet 401 is powered off and the magnet 402 is prevented from rotating. For example, the magnet 402 may be prevented from rotating by shorting the ends of the coil 403 after the electromagnet 401 is de-energized; of course, other power-off self-locking modes can be adopted, as long as the magnet 402 can be prevented from rotating after the electromagnet 401 is powered off.

In this embodiment, the shutter further includes a second mounting plate 50, the second mounting plate 50 is parallel to the first mounting plate 10, a light passing hole 501 is formed in the second mounting plate 50, and the light passing hole 501 faces the shutter opening 101; the second mounting plate 50 is connected to the first mounting plate 10, and the magnet 402 and the iron core 404 are disposed on the second mounting plate 50. With this arrangement, the magnet 402 and the electromagnet 401 can be prevented from occupying the space of the first mounting plate 10, and further from affecting the rotation of the synchronizing ring 20 or each first blade 301.

Specifically, the second mounting plate 50 and the first mounting plate 10 may be connected by a bolt, and certainly, the second mounting plate 50 and the first mounting plate 10 may also be connected by a clamping connection or the like, which is not limited in this embodiment.

Further, a fixing plate 60 may be disposed on a side of the first mounting plate 10 away from the second mounting plate 50, a light-passing opening 601 facing the shutter opening 101 is disposed on the fixing plate 60, the first mounting plate 10 may be connected to the fixing plate 60 by bolts or by clamping, and the fixing plate 60 is used for bearing the first mounting plate 10 and the second mounting plate 50.

With continued reference to fig. 1-9, in this embodiment, the driving device 40 further includes a rotating shaft 405 and a driving rod 406, the rotating shaft 405 is connected to the magnet 402, one end of the driving rod 406 is connected to the rotating shaft 405, and the other end of the driving rod 406 is connected to the synchronizing ring 20. When the magnet 402 rotates, the synchronous ring 20 is driven to rotate by the rotating shaft 405 and the driving rod 406, and the structure is simple and convenient to process.

Specifically, the magnet 402 has a cylindrical shape, and the rotation axis of the magnet 402 coincides with the center line thereof. The magnet 402 is provided with a shaft hole with the center line collinear with the rotation axis of the magnet 402, the rotating shaft 405 penetrates through the shaft hole, and the rotating shaft 405 is rotatably connected with the second mounting plate 50; a driving slot 4021 is disposed at one end of the magnet 402 parallel to the rotation axis, a driving block 4051 is disposed on the side wall of the rotation shaft 405, and the driving slot 4021 is engaged in the driving block 4051 to rotate the rotation shaft 405 while the magnet 402 rotates. This arrangement avoids relative movement between the magnet 402 and the shaft 405 and thus avoids loss of torque output in conduction. One end of the driving rod 406 can be connected with the rotating shaft 405 through bolts, clamping, keys and other modes, and the driving rod 406 can be driven to rotate while the rotating shaft 405 rotates. Further, the rotating shaft 405 and the shaft hole sidewall may be connected by an adhesive to prevent the rotating shaft 405 and the shaft hole from being separated.

In order to fix the magnet 402, a base 502 may be disposed on the second mounting plate 50, a first hole may be disposed on the base 502, a second hole may be disposed on the top seat 408, and the top seat 408 and the base 502 may be detachably connected; the magnet 402 is disposed between the top seat 408 and the bottom seat 502, and one end of the rotating shaft 405 is inserted into the first hole and the other end of the rotating shaft 405 is inserted into the second hole, so as to achieve the rotatable connection between the rotating shaft 405 and the second mounting plate 50. Specifically, the base 502 may be integrally formed with the second mounting plate 50, and may be connected to the second mounting plate 50 by welding or bolting; the top base 408 and the bottom base 502 may be detachably connected by bolts or snaps, etc. to facilitate the detachment and installation of the magnet 402.

Further, a plurality of bases 502 encircle the setting of the central line interval of shutter opening 101, and electro-magnet 401 sets up between two adjacent bases 502, and in order to be convenient for fix electro-magnet 401, can set up first spacing groove on base 502, set up the second spacing groove on footstock 408, and the iron core 404 card of electro-magnet 401 is established in the downthehole that first spacing groove and second spacing groove enclose to realize the installation to electro-magnet 401 when realizing fixing magnet 402.

With reference to fig. 10, in the present embodiment, there are various connection manners between the other end of the driving rod 406 and the synchronizing ring 20, for example, a driving link 409 may be disposed between the synchronizing ring 20 and the driving rod 406, one end of the driving link 409 is rotatably connected to the other end of the driving rod 406, the other end of the driving link 409 is rotatably connected to the synchronizing ring 20, when the magnet 402 rotates, the driving rod 406 is driven to swing by the rotating shaft 405, and then the synchronizing ring 20 is driven to rotate by the driving link 409, so as to open and close the shutter opening 101; the arrangement increases the fault tolerance of the motion synchronization error of the driving device, can effectively avoid the mechanism from being locked, and ensures the stable working stroke of the driving connecting rod 409.

With continued reference to fig. 10, 11, and 24-26, in this embodiment, the other end of the driving rod 406 is provided with a driving pin 407, the synchronizing ring 20 is provided with a connecting portion, and the driving pin 407 is connected to the connecting portion. The driving rod 406 swings, and the synchronizing ring 20 is driven to rotate through the matching between the driving pin 407 and the connecting part, so that the possibility of mechanical interference is reduced through the direct connection between the driving pin 407 and the connecting part, and the output efficiency of the torque of the driving device is ensured.

Illustratively, the connection portion may include a drive pin hole 201 and/or a drive runner provided on the synchronizing ring 20. The driving rod 406 swings to rotate the synchronizing ring 20, and the driving pin 407 slides in the driving slide groove while rotating in the driving slide groove. When the connecting portion is the driving pin hole 201, the driving pin hole 201 is a long hole so that the driving pin shaft 407 can slide in the driving pin hole 201 while rotating in the driving pin hole 201.

Further, the driving chute is an inclined chute; that is, the center of the synchronizing ring 20 is located at the same point on the driving pin shaft 407 outside the connecting line of the two ends of the inclined chute. The driving sliding grooves are arranged obliquely, so that the rotating fluency of the synchronizing ring 20 can be further improved. Of course, the drive slide can also be curved.

Similarly, when the connection portion is the driving pin hole 201, the driving pin hole 201 extends in a direction perpendicular to the center line of the driving pin hole 201, so that the center of the synchronizing ring 20 is located on the driving pin shaft 407 and the same point is located outside the connection line between the two ends of the driving pin hole 201. The driving pin hole 201 may be inclined or curved in a direction perpendicular to a center line thereof.

Illustratively, the synchronizing ring 20 is arranged on the side of the first mounting plate 10 facing the second mounting plate 50, each first blade 301 is arranged on the side of the first mounting plate 10 facing away from the second mounting plate 50, and a window for connecting the synchronizing ring 20 and the first blade 301 is arranged on the first mounting plate 10; the base 502 and the top seat 408 are disposed on a side of the second mounting plate 50 away from the first mounting plate 10, a window is correspondingly disposed on the second mounting plate 50, and the driving pin 407 passes through the window on the second mounting plate 50 and is disposed in the driving sliding slot and/or the driving pin hole 201, so that the driving pin 407 is connected to the synchronizing ring 20 while avoiding mechanical interference.

With continued reference to fig. 12-23, in the present embodiment, the shutter further includes second blades 302, the number of the second blades 302 is the same as that of the first blades 301, the first blades 301 and the second blades 302 are stacked, and the adjacent first blades 301 and second blades 302 form a blade assembly 30; each second blade 302 is rotatably coupled to the first mounting plate 10. Having the shutter include the leaf assembly 30 consisting of the first leaf 301 and the second leaf 302, the size of the individual first leaf 301 and second leaf 302 can be reduced accordingly to increase the rotational speed of the respective first leaf 301 and second leaf 302, thereby further increasing the shutter speed.

Specifically, the second blade 302 is drivingly connected to the synchronizing ring 20 such that when the synchronizing ring 20 rotates until the shutter opening 101 is closed, the first blade 301 and the second blade 302 collectively cover the shutter opening 101, and when the synchronizing ring 20 rotates until the shutter opening 101 is opened, both the first blade 301 and the second blade 302 move to the outside of the shutter opening 101.

With continued reference to fig. 13, in the present embodiment, the first blade 301 and/or the second blade 302 are provided with a reinforcing sheet 303. So set up, can improve the bulk strength of blade subassembly 30. Specifically, the reinforcing sheet 303 may be connected to the first blade 301 or the second blade 302 by means of a bolt connection, a snap connection, or the like. Particularly, the reinforcing sheet 303 is arranged at the rotating shaft part of the first blade 301 and/or the second blade 302 and the edge of the blade, so that the loss of the structural performance of the blade caused by friction of surface contact motion can be better compensated.

Specifically, each leaf assembly 30 is disposed around the shutter opening 101. Further, the plurality of blade assemblies are evenly distributed around the shutter opening 101.

Further, each of the leaf assemblies 30 is sequentially stacked along the centerline of the shutter opening 101, and a separation plate 304 is disposed between two adjacent leaf assemblies 30. In each blade assembly 30 arranged in a stacked manner, the first blades 301 are located in different planes, so that mechanical interference between the first blades 301 can be avoided; similarly, the second blades 302 are located in different planes, so that mechanical interference between the second blades 302 can be avoided. The additional spacer plates 304 disposed between adjacent leaf assemblies 30 may separate adjacent leaf assemblies 30 to prevent interference between adjacent leaf assemblies 30. The separator plate 304 may be bolted or snap-fit to the first mounting plate 10. There may be one or more spacers 304 between two adjacent leaf assemblies 30.

Further, a blade spacer is disposed between the first blade 301 and the second blade 302 of each blade assembly 30, and the blade spacer may separate the first blade 301 and the second blade 302 in each blade assembly 30, so as to prevent the first blade 301 and the second blade 302 from generating mechanical interference or generating surface contact friction. The blade spacers may be bolted or snapped into engagement with the first mounting plate 10. The number of blade spacers between the first blade 301 and the second blade 302 may be one or more.

In this embodiment, the area of the second blade 302 may be smaller than the area of the first blade 301; of course, the area of the second blade 302 may be larger than that of the first blade 301.

In the present embodiment, the axis of each of the first blade 301 and the second blade 302 is closer to the shutter opening 101 than the axis of the magnet 402. That is, the axes of the first blade 301 and the second blade 302 are located between the axis of the magnet 402 and the shutter opening 101. The above arrangement ensures the efficiency of the torque output of the magnet to each of the first blade 301 and the second blade 302, and the shutter speed can be further increased by making the axis of each of the first blade 301 and the second blade 302 closer to the shutter opening 101 than the axis of the magnet 402. Of course, in other implementations, the axes of the first blade 301 and the second blade 302 may also be located on the side of the axis of the magnet 402 facing away from the shutter opening 101.

In one implementation, further, the axis of rotation of the second blade 302 in each blade assembly 30 is collinear with the axis of rotation of the first blade 301. The first blade 301 and the second blade 302 can be connected with the first mounting plate 10 through the same rotating pin 306, and the structure of the shutter is simplified.

With continued reference to fig. 24-26, specifically, the synchronizing ring 20 is provided with a first driving shaft 202 and a second driving shaft 203, the first blade 301 is in driving connection with the first driving shaft 202 through a first connecting member provided thereon, and the second blade 302 is in driving connection with the second driving shaft 203 through a second connecting member provided thereon. The first blades 301 are driven to rotate by the first drive shaft 202 and the second blades 302 are driven to rotate by the second drive shaft 203 while the synchronizing ring 20 rotates.

For example, the first connecting member may be a first driving slot or a first driving hole 3011 disposed on the first blade 301, and the first driving shaft 202 is slidably disposed in the first driving slot or the first driving hole 3011; similarly, the second connecting member may be a second driving slot or a second driving hole 3021 provided on the second blade 302, and the second driving shaft 203 is slidably provided in the second driving slot or the second driving hole 3021. Further, taking the first link as the first driving hole 3011 and the second link as the second driving hole 3021 as an example, the first driving hole 3011 provided on the first blade 301 extends in a direction perpendicular to the axis of the first blade 301 so as to be slidable in the first driving hole 3011 on the first blade 301 while the first driving shaft 202 rotates. The second drive hole 3021 provided in the second blade 302 extends in a direction perpendicular to the axis of the second blade 302 so as to be slidable in the second drive hole 3021 of the second blade 302 while the second drive shaft 203 rotates.

Further, the distance from the first drive shaft 202 to the centerline of the synchronizer ring 20 is smaller than the distance from the second drive shaft 203 to the centerline of the synchronizer ring 20. When the synchronous ring 20 rotates, the rotating speed of the first blade 301 is greater than that of the second blade 302, the rotating angle of the first blade 301 is greater than that of the second blade 302 in the process of opening the shutter opening 101 to closing, the first blade 301 and the second blade 302 are alternately positioned in the shutter opening 101, and the first blade 301 and the second blade 302 jointly cover the shutter opening 101; in the process of opening the shutter opening 101 from closing, the first blade 301 is also rotated by a larger angle than the second blade 302. With this arrangement, on the premise that the synchronizing ring 20 drives the first blade 301 and the second blade 302 to start and stop simultaneously, it is ensured that the rotation angles of the first blade 301 and the second blade 302 are different, the first blade 301 and the second blade 302 cover different regions of the shutter opening 101, and the first blade 301 and the second blade 302 cover the shutter opening 101 together.

With continued reference to fig. 27-34, in other implementations, the axis of rotation of the second blade 302 is located on a different line from the axis of rotation of the first blade 301 in each blade assembly 30. Accordingly, a single pivot pin 306 may be provided for each blade to provide a connection between each blade and the first mounting plate 10.

Specifically, a first pin hole is formed in the first blade 301, a second pin hole is formed in the second blade 302, the first pin hole and the second pin hole are arranged in a collinear manner, a driving pin hole 201 is formed in the synchronizing ring 20, and a driving pin shaft 407 on the electromagnet 401 penetrates through the driving pin hole 201 and then is arranged in the first pin hole and the second pin hole in a penetrating manner. Of course, the center lines of the first pin hole and the second pin hole may be located on different straight lines, and correspondingly, two driving shafts may be disposed on the synchronizing ring 20 at intervals, wherein one driving shaft is disposed in the first pin hole in a penetrating manner, and the other driving shaft is disposed in the second pin hole in a penetrating manner.

Further, the rotation speed of the first blade 301 is greater than the rotation speed of the second blade 302. For example, the rotational axis of the first blade 301 may be closer to the shutter opening 101 than the rotational axis of the second blade 302.

Specifically, since the rotation angle of the second blade 302 is smaller than that of the first blade 301, the start time of the second blade 302 can be made later than that of the first blade 301. After the first blade 301 and the second blade 302 are rotated into the shutter opening 101 and stopped, the first blade 301 and the second blade 302 are alternately disposed, and the first blade 301 and the second blade 302 collectively cover the shutter opening 101.

Illustratively, second drive bore 3021 may extend in a direction perpendicular to the second pin bore centerline on second blade 302; in the process from opening to closing of the shutter opening 101, when the driving pin 407 starts to rotate, the driving pin 407 drives the first blade 301 to rotate, so that the first blade 301 rotates towards the shutter opening 101, and meanwhile, the driving pin 407 slides in the second driving hole 3021, and at this time, the second blade 302 does not rotate; when the driving pin 407 rotates by a certain angle, the driving pin 407 abuts against the sidewall of the second driving hole 3021, and further drives the second blade 302 to rotate toward the shutter opening 101 until the first blade 301 and the second blade 302 cover the shutter opening 101 together. In the process from closing to opening of the shutter opening 101, when the driving pin 407 just starts to rotate, the driving pin 407 drives the first blade 301 to rotate, so that the first blade 301 rotates outward of the shutter opening 101, and meanwhile, the driving pin 407 slides in the second driving hole 3021, and at this time, the second blade 302 does not transmit; when the driving pin 407 rotates a certain angle, the driving pin 407 abuts against the sidewall of the second driving hole 3021, and further drives the second blade 302 to rotate toward the outside of the shutter opening 101, until the first blade 301 and the second blade 302 rotate to the outside of the shutter opening 101.

With continued reference to fig. 14 and 15, in the present embodiment, when the blade assembly 30 is not actuated and the shutter opening 101 is open, there is a first acceleration region (not shown) between the first blade 301 and the edge of the shutter opening 101, and there is a second acceleration region 305 between the second blade 302 and the edge of the shutter opening 101, and the area of the first acceleration region is larger than that of the second acceleration region 305. With such an arrangement, in the process from opening to closing of the shutter opening 101, the first blade 301 may be accelerated in the first acceleration region first, so as to increase the speed of the first blade 301 entering the shutter opening 101, and further shorten the rotation time of the first blade 301; similarly, in the process from opening to closing of the shutter opening 101, the second blade 302 may be accelerated in the second acceleration region 305 to increase the speed of the second blade 302 just entering the shutter opening 101, thereby shortening the rotation time of the second blade 302; thereby shortening the time from opening to closing of the shutter opening 101. Since the rotation angle of the second blade 302 is smaller than that of the first blade 301, the area of the first acceleration region is larger than that of the second acceleration region 305, so that the rotation angle and the rotation speed of the first blade 301 can be relatively large.

With continued reference to fig. 20 and 21, in this embodiment, each electromagnet 401 is de-energized before the first blade 301 and/or the second blade 302 are moved until the shutter opening 101 is fully closed. With this arrangement, the stroke of the first blade 301 and/or the second blade 302 after the shutter opening 101 is completely closed can be shortened, the first blade 301 and/or the second blade 302 can be prevented from passing the predetermined stop position thereof by the inertia thereof, and the additional mechanism can be prevented from colliding, reducing the vibration of the shutter. Similarly, each electromagnet 401 is de-energized before the first blade 301 and/or the second blade 302 move until the shutter opening 101 is fully opened; the stroke of the first blade 301 and/or the second blade 302 after the shutter opening 101 is completely opened can be shortened, the first blade 301 and/or the second blade 302 can be prevented from exceeding the initial position under the action of the inertia thereof, the collision of an additional mechanism can be prevented, and the vibration of the shutter can be reduced.

Further, a limiting groove 103 is formed in the first mounting plate 10, a limiting protrusion 204 is formed in the synchronizing ring 20, and the limiting protrusion 204 is accommodated in the limiting groove 103; after the synchronous ring 20 rotates until the shutter opening 101 is opened, the limiting protrusion 204 is abutted with one side of the limiting groove 103, and after the synchronous ring 20 rotates until the shutter opening 101 is closed, the limiting protrusion 204 is abutted with the other side of the limiting groove 103. With the arrangement, the rotation angle of the synchronizing ring 20 can be limited by the cooperation between the limiting ring 102 and the limiting protrusion 204, so that the synchronizing ring 20 stops at the position corresponding to the opening of the shutter opening 101 and the closing of the shutter opening 101, and the blade assemblies are helped to be converted from the moving state to the static state.

The leaf assembly 30 moves such that each electromagnet 401 is de-energized before the shutter opening 101 is fully closed; before the blade assembly 30 moves to fully open the shutter opening 101, the electromagnets 401 are powered off, so that the impact force between the limiting protrusion 204 and the limiting groove 103 can be reduced, the shake of the shutter is reduced, and the shutter robustness is improved.

In this embodiment, the shutter further includes a limiting ring 102, the limiting ring 102 is disposed around the inner side or the outer side of the synchronizing ring 20, the limiting ring 102 is connected to the first mounting plate 10, and the limiting groove is disposed on the limiting ring 102. The limiting groove is formed on the limiting ring 102, so that the limiting groove can be prevented from being formed on the first mounting plate 10, and the space occupied by the first mounting plate 10 can be avoided. The stop collar 102 may be connected to the first mounting plate 10 by a snap fit or the like. The retainer ring is disposed around the shutter opening 101 with its axis of rotation coinciding with the center line of the shutter opening 101. By arranging the rotatable limiting ring 102, the redundant kinetic energy generated when the synchronous ring 20 rotates until the shutter opening 101 is completely opened or completely closed can be absorbed, and the collision brake of the synchronous ring 20 is realized. The retainer ring 102 can be reset after colliding with the synchronizing ring 20 through an elastic piece matched with the retainer ring. The stroke of the limit ring 102 can be reduced by the friction piece on the peripheral side, for example, as shown in fig. 10, the friction piece mounted on the periphery of the limit ring by the first mounting plate 10 can transmit kinetic energy to the limit ring 102 at the synchronizing ring 20, so as to drive the limit ring 102 to rotate, and then generate friction force with the outer side of the limit ring 102, thereby reducing the motion stroke of the limit ring 102, and further reducing the vibration generated during the shutter action.

With continued reference to fig. 22 and 23, in particular, the leaf assembly 30 moves such that after the shutter opening 101 is closed, a reverse current is applied to each electromagnet 401 to prevent further movement of the leaf assembly 30. The electromagnets 401 are energized with reverse currents to play a braking role, so that the first blade 301 and the second blade 302 are prevented from continuously rotating under the action of inertia, and the position accuracy of the first blade 301 and the second blade 302 when the first blade 301 and the second blade 302 stop is further improved; in addition, the impact force between the limiting protrusion 204 and the limiting groove 103 can be further reduced, the shaking of the shutter can be further reduced, and the robustness of the shutter can be improved.

Similarly, after the blade assembly 30 moves to open the shutter opening 101, a reverse current may be applied to the electromagnet 401 to prevent the first blade 301 and the second blade 302 from continuing to rotate under the inertia effect, so as to further improve the position accuracy when the first blade 301 and the second blade 302 stop; in addition, the impact force between the limiting protrusion 204 and the limiting groove 103 can be further reduced, the shaking of the shutter can be further reduced, and the robustness of the shutter can be improved.

Further, after the reverse current is applied to each coil 403 to stop the movement of each blade assembly 30, the reverse current is continuously applied until the shutter opening 101 is opened. With this arrangement, the shutter can be opened quickly after being closed.

Continuing with fig. 1-34. In other embodiments, there is also provided an imaging apparatus comprising a shutter as described above. The shutter has a structure substantially similar to that of the shutter, and is not described herein again.

The imaging device provided by the embodiment comprises a photosensitive element and a shutter, wherein the shutter controls the light inlet time of the photosensitive element; the shutter includes: the shutter comprises a first mounting plate 10, a synchronizing ring 20, a plurality of first blades 301 and a plurality of driving devices 40, wherein the first mounting plate 10 is provided with a shutter opening 101, the plurality of first blades 301 are arranged around the shutter opening 101, and each first blade 301 is rotatably connected with the first mounting plate 10; a plurality of driving devices 40 are arranged around the shutter opening, each driving device 40 is in transmission connection with the synchronizing ring 20, and the synchronizing ring 20 is in transmission connection with each first blade 301. According to the shutter and the imaging device provided by the embodiment of the invention, each driving device simultaneously drives the synchronous ring to transmit, so that each first blade is driven to rotate, and the opening or closing of the shutter opening is realized; compared with the method that only one driving device is arranged, the power and the volume of a single driving device are reduced, and meanwhile the integral output of the driving device is enhanced, so that the torque of the synchronizing ring is increased, the rotating speed of the synchronizing ring and the first blade is increased, and finally the opening and closing speed of the shutter is increased. By the arrangement, the volume, particularly the radial length, of the shutter can be further compressed, and the variation range of the shutter speed is larger.

The electromagnets 401 of each driving device 40 are arranged around the shutter opening 101, and the electromagnets 401 are electrically connected in series; the magnet 402 of each driving device 40 is arranged between two adjacent electromagnets 401, and each magnet 402 is in transmission connection with the synchronizing ring 20; when the power is on, the electromagnets 401 are electrified simultaneously, so that the magnets 402 rotate, and the magnets 402 drive the synchronizing ring 20 to transmit power simultaneously, so as to drive the first blades 301 to rotate, thereby opening or closing the shutter opening 101; compared with the case where only one driving device is provided, the driving force of the synchronizing ring 20 is increased, and thus the rotational speed of the synchronizing ring 20 and the first blades 301 is increased, and the shutter opening and closing speed is increased.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shutter, comprising: a first mounting plate, a synchronizing ring, a plurality of first blades and a plurality of driving devices,

the first mounting plate is provided with a shutter opening, a plurality of first blades are arranged around the shutter opening, and each first blade is rotatably connected with the first mounting plate;

the driving devices are arranged around the shutter opening, each driving device is in transmission connection with the synchronizing ring, and the synchronizing rings are in transmission connection with the first blades respectively;

the shutter further comprises second blades, the number of the second blades is the same as that of the first blades, the first blades and the second blades are arranged in a stacked mode, and the adjacent first blades and the adjacent second blades form a blade assembly; each second vane is rotatably connected to the first mounting plate.

2. The shutter according to claim 1, wherein the driving means comprises a magnet and an electromagnet, the electromagnets of the plurality of driving means being disposed around the shutter opening and each of the electromagnets being electrically connected in series; the magnet of each driving device is arranged between two adjacent electromagnets and is in transmission connection with the synchronizing ring, and the magnet can rotate under the action of magnetic fields generated by the two adjacent electromagnets;

the electro-magnet includes iron core and coil, and is a plurality of the iron core encircles the shutter opening interval sets up, every the magnet sets up adjacent two between the iron core, every all twine on the iron core has the coil.

3. A shutter according to claim 2, wherein each of the two ends of the core is provided with an arcuate slot, and the two opposing arcuate slots enclose a cavity for receiving the magnet.

4. The shutter according to claim 2, further comprising a second mounting plate disposed parallel to the first mounting plate, the second mounting plate having a light passing aperture disposed therein, the light passing aperture facing the shutter opening; the second mounting panel with first mounting panel is connected, the magnet the iron core all sets up on the second mounting panel.

5. The shutter according to claim 2, wherein the driving means further comprises a rotary shaft connected to the magnet, and a driving lever having one end connected to the rotary shaft and the other end connected to the synchronization ring.

6. The shutter according to claim 5, wherein the other end of the driving rod is provided with a driving pin, and the synchronizing ring is provided with a connecting portion, and the driving pin is connected to the connecting portion.

7. The shutter according to claim 6, wherein the connecting portion comprises a driving pin hole and/or a driving runner provided on the synchronizing ring.

8. The shutter according to claim 7, wherein the drive chute is a diagonal chute.

9. The shutter of claim 1, wherein the axis of rotation of the second blade of each of the blade assemblies is collinear with the axis of rotation of the first blade; the second blade is in transmission connection with the synchronous ring, so that when the synchronous ring rotates to close the shutter opening, the first blade and the second blade jointly cover the shutter opening.

10. The shutter according to claim 1, wherein an axis of rotation of each of the first blade and the second blade is closer to the shutter opening than an axis of rotation of the drive means.

11. The shutter according to claim 1, wherein the synchronization ring is provided with a first drive shaft and a second drive shaft, the first blade is drivingly connected to the first drive shaft by a first connector provided thereon, and the second blade is drivingly connected to the second drive shaft by a second connector provided thereon.

12. The shutter of claim 11, wherein the distance between the first drive shaft to the synch ring centerline is less than the distance between the second drive shaft to the synch ring centerline.

13. The shutter of claim 1, wherein the axis of rotation of the second blade of each of the blade assemblies is located on a different line than the axis of rotation of the first blade.

14. The shutter of claim 13, wherein the angular velocity of the first blade is greater than the angular velocity of the second blade.

15. A shutter according to claim 13, wherein the actuation time of the second blade is later than the actuation time of the first blade.

16. The shutter of claim 1, wherein when the blade assembly is not actuated and the shutter opening is open, the first blade has a first acceleration zone between the first blade and an edge of the shutter opening and the second blade has a second acceleration zone between the second blade and an edge of the shutter opening, the first acceleration zone having an area greater than the second acceleration zone.

17. The shutter of claim 1, wherein the blade assembly moves to de-energize each of the drive means prior to closing the shutter opening.

18. The shutter of claim 17, wherein the blade assembly moves to pass a reverse current to each of the drive means after the shutter opening is closed to prevent further movement of the blade assembly.

19. The shutter of claim 18, wherein after a reverse current is applied to each of said drive means to stop movement of each of said leaf assemblies, the reverse current is continued until said shutter opening is opened.

20. A shutter according to claim 1, wherein a reinforcing sheet is provided on the first blade and/or the second blade.

21. The shutter of claim 1, wherein each of the blade assemblies is disposed around the shutter opening.

22. The shutter of claim 21, wherein a plurality of the blades are evenly distributed around the shutter opening.

23. The shutter according to claim 21, wherein each of the blade assemblies is stacked in sequence along a centerline of the shutter opening, and a separation plate is disposed between two adjacent blade assemblies.

24. The shutter of claim 1, wherein the second blade area is smaller than the first blade area.

25. A shutter according to claim 1, wherein the axis of the synchronising ring coincides with the centre line of the shutter opening, and the first blades are in one-to-one correspondence with the drive means.

26. The shutter according to claim 1, wherein the first mounting plate is provided with a limiting groove, and the synchronizing ring is provided with a limiting protrusion, and the limiting protrusion is accommodated in the limiting groove;

when the synchronizing ring rotates to open the shutter opening, the limiting protrusion is abutted to one side of the limiting groove, and after the synchronizing ring rotates to close the shutter opening, the limiting protrusion is abutted to the other side of the limiting groove.

27. The shutter according to claim 26, further comprising a retainer ring, wherein the retainer ring is disposed around the outside of the synchronizing ring, the retainer ring is connected to the first mounting plate, and the retainer groove is disposed on the retainer ring.

28. An imaging device is characterized by comprising a photosensitive element and a shutter, wherein the shutter controls the light incoming time of the photosensitive element;

the shutter includes: a first mounting plate, a synchronizing ring, a plurality of first blades and a plurality of driving devices,

29. The imaging apparatus of claim 28, wherein the driving means comprises a magnet and electromagnets, the electromagnets of the plurality of driving means being disposed around the shutter opening and each of the electromagnets being electrically connected in series; the magnet of each driving device is arranged between two adjacent electromagnets and is in transmission connection with the synchronizing ring, and the magnet can rotate under the action of magnetic fields generated by the two adjacent electromagnets;

30. An imaging device according to claim 29, wherein each of the two ends of the core is provided with an arcuate slot, and the two opposing arcuate slots enclose a cavity for receiving the magnet.

31. The imaging apparatus of claim 29, wherein the shutter further comprises a second mounting plate disposed parallel to the first mounting plate, the second mounting plate having a light aperture disposed therein, the light aperture facing the shutter opening; the second mounting panel with first mounting panel is connected, the magnet the iron core all sets up on the second mounting panel.

32. The imaging apparatus of claim 29, wherein the driving device further comprises a rotating shaft connected to the magnet, and a driving rod having one end connected to the rotating shaft and the other end connected to the synchronizing ring.

33. The imaging apparatus as claimed in claim 32, wherein the other end of the driving rod is provided with a driving pin, and the synchronizing ring is provided with a connecting portion to which the driving pin is connected.

34. An imaging device according to claim 33, wherein the connecting portion comprises a drive pin hole and/or a drive runner provided on the synchronizing ring.

35. The imaging apparatus of claim 34, wherein the drive chute is a diagonal chute.

36. The imaging apparatus of claim 28, wherein the axis of rotation of said second blade of each said blade assembly is collinear with the axis of rotation of said first blade; the second blade is in transmission connection with the synchronous ring, so that when the synchronous ring rotates to close the shutter opening, the first blade and the second blade jointly cover the shutter opening.

37. The imaging device of claim 28, wherein an axis of rotation of each of the first blade and the second blade is closer to the shutter opening than an axis of rotation of the drive device.

38. The imaging apparatus of claim 28, wherein the synchronizing ring has a first drive shaft and a second drive shaft disposed thereon, the first blade being drivingly connected to the first drive shaft by a first connector disposed thereon, and the second blade being drivingly connected to the second drive shaft by a second connector disposed thereon.

39. The imaging apparatus of claim 38, wherein a distance between the first drive shaft to the synch ring centerline is less than a distance between the second drive shaft to the synch ring centerline.

40. The imaging apparatus of claim 28, wherein the axis of rotation of said second blade of each said blade assembly is on a different line than the axis of rotation of said first blade.

41. The imaging apparatus of claim 40, wherein the angular velocity of the first blade is greater than the angular velocity of the second blade.

42. The imaging apparatus of claim 40, wherein a start time of the second blade is later than a start time of the first blade.

43. The imaging apparatus of claim 28, wherein when the blade assembly is not actuated and the shutter opening is open, there is a first acceleration zone between the first blade and an edge of the shutter opening and a second acceleration zone between the second blade and an edge of the shutter opening, the first acceleration zone having an area greater than an area of the second acceleration zone.

44. The imaging apparatus of claim 28, wherein said blade assembly moves to de-energize each of said drive means prior to closing said shutter opening.

45. The imaging device of claim 44, wherein said blade assembly moves to pass a reverse current to each of said drive means after said shutter opening is closed to prevent further movement of said blade assembly.

46. The imaging device of claim 45, wherein after a reverse current is applied to each of said drive means to stop movement of each of said blade assemblies, the reverse current is continued until said shutter opening is opened.

47. The imaging apparatus of claim 28, wherein a stiffener is disposed on the first blade and/or the second blade.

48. The imaging apparatus of claim 28, wherein each of said blade assemblies is disposed around said shutter opening.

49. The imaging apparatus of claim 48, wherein a plurality of the blades are evenly distributed around the shutter opening.

50. The imaging apparatus of claim 48, wherein each of said blade assemblies is stacked in sequence along a centerline of said shutter opening, and a separation plate is disposed between two adjacent blade assemblies.

51. The imaging apparatus of claim 28, wherein the second blade area is smaller than the first blade area.

52. The imaging apparatus of claim 28, wherein an axis of the synchronization ring coincides with a center line of the shutter opening, and the first blades are in one-to-one correspondence with the driving means.

53. An imaging device according to claim 28, wherein the first mounting plate is provided with a limiting groove, and the synchronizing ring is provided with a limiting protrusion, the limiting protrusion being received in the limiting groove;

54. The imaging apparatus of claim 53, wherein the shutter further comprises a retaining ring, the retaining ring is disposed around an outer side of the synchronizing ring, the retaining ring is connected to the first mounting plate, and the retaining groove is disposed on the retaining ring.