CN1090395A

CN1090395A - Electromegnetic shutter apparatus

Info

Publication number: CN1090395A
Application number: CN93102076A
Authority: CN
Inventors: 徐在庆; 崔德浩; 李先浩
Original assignee: Samsung Aerospace Industries Ltd
Current assignee: Hanwha Aerospace Co Ltd
Priority date: 1992-11-10
Filing date: 1993-01-30
Publication date: 1994-08-03
Also published as: JPH06324378A; KR940012035A; DE4302389C2; KR970011200B1; FR2697924B1; DE4302389A1; RU2103709C1; GB9300765D0; FR2697924A1; JP2868965B2; GB2272532B; GB2272532A

Abstract

The invention provides a kind of can be used for having small and exquisite structure and regulate with the camera of robotization of exposing on electromegnetic shutter apparatus, this device has lens mount; Two blades; Comprise the exposure adjustment cam, buckle mechanism and release cam, the exposure regulating ring that drives by the linear pulse motor revolution; Comprise forearm, the focal adjustments ring of lens interlinked mechanism and postbrachium; The resetting-mechanism that the focusing regulating ring is resetted; Make the clamping device of focal adjustments ring stop; Make the open closed open mechanism of blade; Contact switch; And according to controlling the CPV that linear pulse motor rotates by photometry loop and range finding loop institute input signal.

Description

Electromegnetic shutter apparatus

The present invention relates to the camera blade drive device, especially utilize electromagnetic force to drive shutter device.

Electromegnetic shutter apparatus is to adopt the direction and the time of electrical current on the control electromagnet to control with the switch to blade.This shutter has simply constructed advantage than the mechanical shutter that utilizes spring force.

U.S. Pat 4,881,093 discloses a kind of electromagnetic actuator device, and the electromegnetic shutter apparatus of this patent includes the permanent magnet that is installed on the blade.Produce by several armatures and permanent magnet and to interact and forms magnetic field, make blade open and make-position between mobile.The shape of permanent magnet and armature makes even without also making blade maintain the position of closing to the armature supplying electric current.Permanent magnet is because of magnetic field face " aerial over draft ", and institute is slyness so that the action of blade between opened and closed positions becomes.But the shutter of this patent can not be used to focus and the camera of the robotization that exposes.

Different therewith, in the disclosed electromegnetic shutter apparatus of patent announcement 90-33130, be provided with to driving and be in the movable coil component of blade first between fixed permanent magnet and the relay armature relative with it, and, just can realize automatic exposure by difference actuation time of regulating two moving coil parts in order to determine the second moving coil parts of identical blade stretching degree.But the shutter of this form is not owing to there is automatic focusing function, thereby only is applicable to the camera of simple fix-focus type, and is not suitable for general now zoom camera.

The objective of the invention is to overcome the deficiency of aforementioned prior art, provide a kind of can being used for that small and exquisite structure is promptly arranged, and the electromegnetic shutter apparatus of focusing and the automatic camera of exposure.

According to above-mentioned purpose, the present invention proposes the lens mount that includes cylindrical portions may and be fixed on the ring flange of cylindrical portions may bottom; On the opposite sides of the face that cylindrical portions may is being set of ring flange, be equipped with rotaryly, be in the blade of line symmetry in fact; Include the exposure adjustment cam that forms successively along described rotation direction, hang embarkation structure and shutter release cam and rotate the exposure regulating ring with linear pulse motor; Include the forearm that forms successively along the such rotation direction, the focal adjustments ring of camera lens interlinked mechanism and postbrachium; Make the resetting-mechanism of focal adjustments ring along the reverse direction rotation of described rotation direction; Be subjected to the shutter camming action and the focal adjustments ring is stopped operating, shutter discharges and keeps the stop mechanism of release conditions; The adjustment cam of being exposed effect and make the opening of blade and the closed adjusted open mechanism of opening amount; Be subjected to the postbrachium effect and produce the contact switch of electric signal; And comprise the Cpu that controls the linear pulse motor rotating function by photometry loop and range finding loop institute input signal.Aforesaid exposure regulating ring and focal adjustments ring are contained in the periphery of cylindrical portions may rotationally.

Following qualification by way of example with reference to accompanying drawing describes invention, wherein:

Fig. 1 is the signal exploded perspective view of certain embodiment of electromagnetic actuator device of the present invention;

Fig. 2 is the expansion oblique view of the action piece of the ratchet among Fig. 1;

Fig. 3 be among Fig. 1 embodiment ring-type rotor and the stator that disposed on every side thereof at synoptic diagram when straight line launches;

Fig. 4 is the synoptic diagram that is used for the action of key diagram 3 rotors;

Fig. 5 has the stator of different formations and the rotor synoptic diagram along planar development with Fig. 3;

Fig. 6 is the planimetric map and the outboard profile of Fig. 5 rotor;

Fig. 7 is the oblique view that constitutes one of stator winding magnet among Fig. 5;

Fig. 8 is the sequential chart to each armature energising of stator among Fig. 5;

Fig. 9 is used for key diagram 1 blade action enlarged diagram;

Figure 10 is the blade open state figure of presentation graphs 9;

The front schematic view of the electromegnetic shutter apparatus assembled state of Figure 11 presentation graphs 1;

The side schematic view of the electromegnetic shutter apparatus assembled state of Figure 12 presentation graphs 1;

Figure 13 is the employed circuit block diagram of electromegnetic shutter apparatus of the present invention;

Figure 14 represents AF ring releasing orientation synoptic diagram among Figure 11;

Figure 15 represents to make the adjusted synoptic diagram of focus because the AF ring rotates among Figure 14;

Figure 16 is illustrated among Figure 14 by the open view of AE ring rotating shuttle.

In the accompanying drawings, label 2 is a lens mount, the 4th, and cylindrical portions may, the 6th, ring flange, 8 are the exposure regulating ring, 10 is the focal adjustments ring, the 12nd, rotor, 14 are the exposure adjustment cam, 16 is the shutter release cam; 18 for hanging the embarkation structure, and 20 is ratchet, and 34 is forearm, 36 is postbrachium, and 38 is the camera lens coupled arm, and 42 is pawl gear, 43 is resetting-mechanism, and 44 is pin rod, the 46th, and magnetic pole, the 48th, stator, 50 and 52 is field magnets, 54,56,58 and 60 is armature, 62 is circular-arc fluting, and 64 and 66 is blade, and 80 for leading the tip, 86 is contact switch, and 88 is lens drum, and 90 is lever.

Referring to Fig. 1, the ring flange 6 that lens mount 2 comprises cylindrical portions may 4 and is fixed on these cylindrical portions may 4 bottoms.

The periphery of cylindrical portions may 4 installs exposure regulating ring 8(successively rotationally and encircles hereinafter referred to as AE), focal adjustments ring 10(encircles hereinafter referred to as AF) and rotor 12.

Form AE cam 14, fixed mechanism 18 and the shutter release cam 16 of regulating the blade amount of opening along the counter-clockwise direction order at AE ring outer peripheral face.

Along with AE ring 8 rotates along counter-clockwise direction, shutter release cam 16 can make ratchet 20 startings of rotational fixation on the ring flange 6 of aforementioned lens mount 2.As shown in Figure 2, ratchet 20 contains the detent 22 and the tip 26, and this ratchet 20 is pressurizeed on certain orientation by knob power spring 24.When AE ring 8 when counter-clockwise direction is rotated, push the tip 26 that is fixed on the detent 22 by shutter release cam 16 ratchet 20 rotated along counter-clockwise direction.

The tip 20 of ratchet 20 is engaged on again on the shim made from magnetic material 28 in the formed otch 30.When shim 28 disposes at certain intervals with electromagnet 32 on the ring flange 6 that is configured in lens mount 2, shim 28 is attracted on electromagnet 32 because electromagnet 32 is excitatory.

Referring to Fig. 1, be formed with forearm 34 on the periphery of AE ring 10 again, postbrachium 36, camera lens coupled arm 38 and spring be the jut 40 of usefulness fixedly.Certain position of encircling 10 peripheries at AF is formed with the ratchet gear train 42 that cooperates with the retainer 22 of aforementioned ratchet 20.Camera lens trace 38(is as shown in the figure) form forkedly, this camera lens trace 38 is with 90(Figure 12 of the lever of mentioning later) constitute the camera lens interlinked mechanism.

Aforesaid ratchet 20, ratchet gear train 42, stage clip 24, shim 28 and electromagnet 32 constitute one group of stop mechanism, stop aforementioned AF to encircle 10 rotation by this stop mechanism, keep its release and release conditions.

AF ring 10 is inserted in the periphery of cylindrical portions may 4, and forearm 34 contacts with the side of the counter-clockwise direction side of the fixed mechanism 18 of AE ring 8.

At the other end that is connecting the tension spring 43 on the ring flange 6 that an end is fixed on lens mount 2 on the spring fixed projection 40.This tension spring 43 is to make focal adjustments ring 10 turn back to the resetting-mechanism of origin-location.

Rotor 12 constitutes linear pulse motor with stator 48 described later.Because rotor 12 is contained on the periphery of cylindrical portions may 4, and this rotor 13 and AE ring 8 turns to the inserted link 44 of extension to be connected by the fixed orifice 45 that is inserted into rotor 12 along cylindrical portions may 4 neighborings.Therefore, rotor 12 is integral rotation with AE ring 8.Inserted link 44 can have more than one with the number of fixed orifice.

Rotor 12 has a permanent magnet, is formed with equally spaced several magnetic poles 46 of outwards giving prominence to along radius basically within the certain interval on rotor 12 peripheries, and the N utmost point of these magnetic poles and S are provided with extremely each other at certain intervals and alternately.

At 12 one-tenth certain distance configurations of rotor 12 peripheries and this rotor stator 48, these stator 48 reality are separated with lens mount 2, and are arranged on the camera

body.Field magnet

50,52, a

name field magnet

50,52 that stator 48 is formed with the E font of winding have two armatures (54,56 and 58,60) respectively.If desired, can between two blocks of

field magnets

50,52, dispose permanent magnet 61, and

armature

54,56,58 and 60 formed magnetic fields are enhanced.

Fig. 3, for convenience of description, is launched into the plane with these armatures and represents with respect to stator 48 actions in order to the explanation rotor.Certainly, in fact as shown in Figure 1,

armature

54,56,58 and 60 is that the periphery along stator 12 becomes circle-shaped setting.

Among Fig. 3, the direction of winding of each

armature

54,56,58 and 60 coils all is identical.The supply of electric current is the

armature

54,56 with respect to field magnet 50, carries out respectively separately facing to the

armature

58,60 of field magnet 52 then.

Interval between the

armature

54,56 of field magnet 50 is different mutually and set according to the polarity of the magnet of the relative rotor of this armature 54,56.That is, armature 54 is the S utmost point with respect to the magnetic pole 46 of rotor, and electrode 56 relative magnet rotors is N utmost points in the utmost point 46.Interval between the

armature

58 and 60 of field magnet 52 is provided with too.

When the

armature

54,56 of field magnet 50 was relative with the magnetic pole 46 of rotor respectively, then the

armature

58,60 of field magnet 52 was relative with the interval of 46 of the magnetic poles of rotor respectively.

Fig. 4 is that the rotor driven with Fig. 3 is divided into 4 sections and represents.Here, suppose that coil twines with direction shown in Figure 3 on each armature.

At first section, electric current is the E from field magnet 52 ₄End flows to E ₃End.Therefore, the termination of

armature

58,60 forms the S utmost point and the N utmost point respectively because this S utmost point and the N utmost point attracting respectively contiguous rotor the magnetic pole N utmost point and the S utmost point, so rotor moves 1/4 spacing to the right side of figure.

At second section, electric current is the E from field magnet 50 ₂End flows to E ₁End.The 3rd section, electric current a E from field magnet 50 ₁End flows to E ₂End.And, the also proper E of electric current in the 4th section from field magnet 50 ₁End flows to E ₂End.The end polarity of each armature is identical with the corresponding diagram of each section respectively in second and third and four sections, because the same with first section, is attracting the magnetic pole of the opposite polarity of adjacent rotor, so in each section, rotor moves 1/4 spacing to each illustrated left side.

From first section to the 4th section one-period, rotor forms to the drawing left side and moves a spacing (being actually the component of rotation of doing an interval along counter-clockwise direction).If suitably change order and direction that above-mentioned electric current flows, then can form and top opposite rotor rotation direction.

Fig. 5 to Fig. 7 represent with Fig. 3 in rotor and stator 48 embodiment that different structure is arranged.

At first, in this embodiment, be divided into levels in certain interval of the outer peripheral face of rotor 12, be formed with a plurality of N utmost points on the upper strata, and there be a plurality of S utmost points in lower floor, become equally spaced outwards outstanding along radial direction in fact respectively with reference to Fig. 6.Suppose such magnetic pole just to form ribbon shown in Figure 5 along planar development.At this, N utmost point symbol 46a, the S utmost point is represented with symbol 46b.

Shown in Figure 7 is one of to constitute in the

field magnet

50,52 of winding of present embodiment stator.The termination of armature (54,56 or 58,60) correspondingly is divided into levels with the magnetic pole that is divided into the stator 12 of levels, in each layer, uniformly-spaced to form in fact along the inboard several outshots (among the figure being 2) that extend of radial direction.The outshot of this levels germanium is parallel to each other opened configuration.

In fact, suppose to be configured in the field magnet 50 of rotor 12 peripheries, 52 when being launched into the plane, just as shown in Figure 5, in the drawings, represent to have the top section of

armature

54,56,58 and 60 at the N of rotor 12 utmost point 46a upside, and represent to have the underclad portion of

armature

54,56,58 and 60 at the downside of the S of rotor 12 utmost point 46b.In fact levels two parts of 54,56,58 and 60 do not leave mutually.

As shown in Figure 5, armature 54 upper strata outshots are relative with the N utmost point 46a of rotor, and the compartment between the S utmost point 46b of armature 54 lower floor's outshots and rotor is relative.And the compartment between the N utmost point 46a of armature 56 upper strata outshots and rotor is relative, and armature 56 lower floor's outshots are relative with the S utmost point 46b of rotor.

The N utmost point 46a of armature 58 upper strata outshots and rotor and 1/4 compartment in left side thereof overlap relative, and the S utmost point 46b of armature 58 lower floor's outshots and rotor and the 1/4 compartment overlapping on right side thereof are relative.And armature 60 upper strata outshots are relative with the 1/4 compartment overlapping in rotor 46a and left side thereof, and lower floor's outshot of armature 60 overlaps relative with 1/4 compartment in the S utmost point 46b of rotor and left side thereof.

The galvanization of this embodiment is to carry out in the same manner with the sequential of Fig. 8.

In the first step, electric current is from E ₁End flows to E ₂End is simultaneously from E ₃End flows to E ₄End, the teat of

armature

54,58 at this moment is divided into the N utmost point, and the teat of

armature

56,60 is divided into the S utmost point.Successively, just produce repulsive force between the relative rotor upper strata N utmost point 46a that the outshot on armature 58 upper stratas has part to overlap, and armature 58 lower floor's outshots and and this outshot have part to overlap the S of rotor lower floor utmost point 46b vis-a-vis between produce attractive force.And, armature 60 upper strata outshots and and this outshot the main attractive force of giving birth between the rotor upper strata N utmost point 46a that part overlaps is arranged, armature 60 lower floor's outshots and have part to overlap with this outshot to produce repulsion between the relative S of the rotor lower floor utmost point 46b.Thereby rotor 12 integral body move 1/4 compartment with respect to stator towards the other side left side.

Find out by Fig. 8 is clear, from E ₁Hold to E ₂The current impulse of end does not reach the whole interval of the first step, and this is in order to prevent the running phenomenon excessively of rotor 12.It also is same that this situation goes on foot in the 4th step second.

In second step, electric current is from E ₁End flows to E ₂End, and from E ₄End flows to E ₃End.The teat of

armature

54,60 at this moment is divided into the N utmost point, the outshot of

armature

56,58 or the S utmost point.So, armature 54 upper strata outshots and with relative rotor upper strata N utmost point 46a that this outshot has part to overlap between produce repulsion, and armature 54 lower floor's outshots and with the relative S of rotor lower floor utmost point 46b that this outshot overlaps between produce suction.In addition, electrode 56 upper strata outshots and have part to overlap with this outshot to produce suction between the relative rotor upper strata N utmost point 46a.Lower floor's outshot of armature 56 and have part to overlap with this outshot to produce repulsion between the relative S of the rotor lower floor utmost point 46b.Therefore, rotor 12 integral body move 1/4 spacing more to the right with respect to stator.

In the 3rd step, electric current is from E ₃End flows to E ₁End, and from E ₄End flows to E ₃End.In the 4th step, electric current is from E ₂End flows to E ₁End, and from E ₃End flows to E ₄End.Here, the detailed action specification in the 3rd step and the 4th step is omitted, in fact its principle goes on foot identical with the first step and second.

Because move 1/4 to the right at interval with respect to the appropriate section of stator at each step rotor 12, so in the first step to the between the complete cycle in four steps, rotor 12 one (be actually the rotor clockwise direction and changeed an interval) at interval that just moved right.If sequence of flow and direction to above-mentioned electric current are made appropriate change, the rotation direction that then can make rotor is with aforementioned opposite.

In addition, on the ring flange 6 of aforementioned lens mount 2, form roughly circular-arc fluting 62 among Fig. 1 along the cylindrical portions may radial direction.

On the opposite sides that cylindrical portions may 4 is being set on the ring flange 6, supporting two

blades

64,66 of in fact linear symmetry each other rotationally.Very clearly express the shape of these blades among Fig. 9 and Figure 10.

Be formed with on the blade 66 and lead seam 78 and perforate 74, also be formed with on the blade 64 be in blade 66 on the guide hole 76 and the perforate 72 at the position line symmetric position place that leads seam 78 and perforate 74.

Blade

64,66 is used perforate 72,74 respectively, and is supporting rotationally by the support pins on the aforementioned opposite sides that is arranged on ring flange 6 68,70.

The perforate of support pins 68 penetrating blades 64, and supporting guide rod 82 rotationally.Be fixed with on this guide rod 82 aforementioned circular-arc crack rotate in 62 lead the tip 80.Guide rod 82 is subjected to an end and hangs over from the outstanding tip 83 of ring flange, and the other end is engaged on the stage clip 84 on the side of guide rod 82, and is subjected to clockwise pressure.That leads the tip 80 penetrating

blades

64,66 leads

seam

78,76, and cracking by ring flange 6 circular-arc 62 contacts with cam surface that AE encircles 8 AE cam 14 again.

Aforesaidly circular-arcly crack 62, guide rod 82, stage clip 84 and

lead seam

76,78 and constituted one group of open mechanism, this mechanism is subjected to the periphery of aforementioned AE cam 14 and

blade

64,66 is opened or closed.

Fig. 9 and Figure 10 represent closing of

blade

64,66 and open state respectively.If the AE ring rotates along clockwise direction, then, AE cam 14 leads the tip 80 along the 62 radial direction outsides that are forced into ring flange 6 of cracking because making, thereby making

blade

64,66 is the center with separately support

pins

68,70, rotates outwardly mutually and opens, as Figure 10 is represented.

Here, utilize the rotational angle scalable of AE cam 14 to lead the displacement of the tip 80, thereby clearly, also can make the opening amount of

blade

64,66 controlled.

Referring to Figure 11, the rotor 12 that is contained in cylindrical portions may 4 peripheries is owing to

armature

54,56,58 and 60 turns.Because rotor 12 and AE ring 8 interconnect by the tip 44, so AE ring 8 rotates with rotor 12.If AE ring 8 rotates along counter-clockwise direction, the forearm 34 because of AF ring 10 is pressed on the fixed mechanism 18 of AE ring 8 so, rotates so clockwise is expanded on AF ring 10 same edges.Meanwhile, the shutter release cam 16 of AE ring 8 make the tip 26 pressing ratchet 20 along inverse time direction rotate and unclamped AF ring 10.And the postbrachium 36 of AF ring 10 is opened the contact switch on the ring flange 6 that is arranged on lens mount 2, and produces electric signal, and this electric signal is imported among the CPU described later.

As shown in figure 12, lens drum 88 is equipped with in the place ahead of lens mount 2.

Moving lens position at lens drum 88 is provided with lever 90, and it is connected with the lens coupled arm 38 of AF ring 10.If forked (as shown in Figure 1) made in the end of coupled arm 38, then the attended operation of it and lever 90 is easily.

Electromegnetic shutter apparatus of the present invention (Figure 13) is by common electronic control system control.Referring to Figure 13, along with from light measuring circuit 94 and range-measuring circuit 96 to the CPU output signal, electric current is flowed in the stator 48.

Below the action of electromegnetic shutter apparatus of the present invention is made an explanation.

Figure 11 represents the original state of shutter work, and at initial state, shutter release button (figure does not show) is pressed into first section, shortens to free position, and the control signal that is produced by CPU92 makes electric current flow through stator 48.As shown in figure 14, rotor 12 rotates along counter-clockwise direction, causes ratchet 20 to forward the off-position to by the shutter release cam 16 of AF8.At this moment, because the fixed mechanism 18 of AF ring 10 and AE ring 7 forces together and rotates along counter-clockwise direction,, thus, the action commencing signal is delivered to CPU92 so contact switch 86 disconnects.

The CPU92 that has accepted the action commencing signal makes electromagnet 32 excitations, and shim 28 is attracted like this, to make ratchet 20 maintain the off-position on electromagnet 32.In addition, meanwhile, the CPU92 reverse signal that is equivalent to distance value that the loop measures of will finding range is given stator 48.

As a result, rotor 12 forms state as shown in figure 15, has deasil rotated the angle that is equivalent to the afore-mentioned distance value.At this moment, AF ring 10 is because the effect of tension spring 43 also produces same clockwise rotation.

If rotor 12 stops operating, CPU92 just makes electromagnet 32 demagnetizations.Thus, ratchet 20 is owing to the pressurization of stage clip 24, and detent 22 just encircles 10 ratchet rotating mechanism 42 engagements with AF.

The forearm 34 of AF ring 10 turns to buckling during the mechanism 18 of AE ring 8 along clockwise direction under AF ring 10 acts on owing to back-moving spring 43, the lever 90 that rotates with the lens coupled arm 38 of AF ring 10 rotates the moving part of lens drum 88, and realizes the adjusting of focus.

Shutter release button,, makes electric current flow into stator 48, and rotor is further turned to and the corresponding angle of photometry loop 94 measured values along clockwise direction along with the control of CPU92 until by to camera positions by to second section.Thus, the AE cam 14 of AE ring 8 is pressed and is led the tip 80 and make

blade

64,66 open (shown in Figure 6).

The amount of opening of

blade

64,66 as previously mentioned, depends on the displacement of leading the tip 80 that is moved by the AE cam.In addition, the blade open hour depend on that the reverse electric signal because of CPU92 makes AE ring 8 rotate along counter-clockwise direction, return to time of origin-location up to leading the tip 80.Along with this reverse electric signal, AE ring 8 rotates along counter-clockwise direction and returns to state shown in Figure 11, and a running period of having finished shutter of the present invention.

As mentioned above, electromegnetic shutter apparatus of the present invention is simple in structure, and especially, this device can be used for having the camera of automatic exposure function and automatic exposure function, that is, can be used on focal length needs in the self-aligning autofocus camera.

The front is described finishing the shutter device with auto-focus function and automatic exposure function.But, for people with general knowledge in the technical scope under the present invention, in the scope of notion of the present invention, as long as any in employing automatic exposure function or the auto-focus function, shutter device of the present invention is modified or changes is self-evident.

Claims

1, a kind of electromegnetic shutter apparatus, this device comprise the lens mount that contains cylindrical portions may 4 and be fixed on the ring flange 6 of these cylindrical portions may 4 bottoms;

On the face of the opposite side of the face that cylindrical portions may 4 is being set of described ring flange 6, install rotating, come down to two blades 64,66 of line symmetry each other;

Form successively and comprise having exposure adjustment cam 14 along promptly deciding direction, buckle mechanism 18 and shutter release cam 16 by the exposure regulating ring 8 of linear pulse motor rotation;

Form successively along described rotation direction and to include forearm 34, the focal adjustments ring 10 of lens interlinked mechanism 38 and postbrachium 36;

The resetting-mechanism 43 that described focal adjustments ring 10 edges and described rotation direction are rotated in the opposite direction;

Be subjected to described release cam 16 effects, stop the rotation of described focal adjustments ring 10, keep the clamping device of release conditions;

Be subjected to described exposure adjustment cam 14 effects, so that adjusted opening and locking and the open mechanism of the opening amount of described blade 64,66;

Be subjected to said postbrachium 36 effects and the contact switch 86 of generation electric signal; And

Comprise along with the CPU92 that controls the rotating function of said linear pulse motor by photometry loop 94 with range finding 96 input signals in loop, it is characterized in that,

Described exposure regulating ring 8 and described focal adjustments ring 10 be contained in rotationally described cylindrical portions may 4 around, and in fact the action of described shutter device comprises:

Phase one, shutter release button is pressed into first section, described impulse motor rotates along described rotation direction along with control signal makes by described CPU92, discharge described folder on-hook structure by described release cam 16, owing to utilizing described buckle mechanism 18 to pin described forearm 34 described focal adjustments ring 10 is rotated along described rotation direction, and owing to be subjected to the effect of described postbrachium 36, described contact switch 86 is delivered to described CPU92 with described electric signal;

Subordinate phase, the control signal of being come by described CPU92 maintains the off-position with described folder on-hook structure, and the reverse signal of the distance value of described range finding loop 96 being measured by CPU92 is delivered to described linear pulse motor;

Phase III, described linear pulse motor is along rotating the corresponding angle of described distance value with the direction of described direction of rotation, and described focal adjustments ring 10 utilizes described resetting-mechanism to move along the direction with described direction of rotation equally;

Quadravalence section: stop described linear pulse motor and rotate; The control signal of coming along with described CPU92 makes described focal adjustments ring 10 by described clamping device stop simultaneously;

Five-stage: described shutter release button is pressed into the control signal edge and the direction rotation of described direction of rotation and the measured value corresponding angle in described photometry loop 94 of the second described linear pulse motor by CPU92, and described exposure adjustment cam 14 acts on described open mechanism, makes described blade 64,66 open;

The 6th stage; The reverse signal of utilizing described CPU92 to transmit makes described exposure regulating ring 8 rotate along described direction, thus, is returned to the stage of original locked position of coupler by described open mechanism blade 64,66.

2, shutter device as claimed in claim 1 is characterized in that described extension embarkation structure 18 is the shape of giving prominence in exposure regulating ring 8 peripheries.

3, shutter device as claimed in claim 1 is characterized in that, described linear pulse motor includes the ring-shaped rotor that installs rotationally around cylindrical portions may 4, and is configured in the stator 48 around this rotor 12;

Be formed with the several N utmost points and the S utmost point in certain interval on described rotor 12 peripheries, they have compartment each other, come down to alternately outwards outstanding to the radius of rotor 12 at interval;

Described stator 48 comprises two field magnets 50 that are made of two armatures (54,56 and 58,60) respectively, 52, each field magnet 50,52 are wound with lead mutually separately, being spaced apart between two armatures of each field magnet makes this armature and its, and polarity of the magnetic pole of relative described rotor is different mutually and decide respectively, and when the armature of the field magnet one of in the described field magnet is relative with the magnetic pole of described rotor respectively, the armature of another field magnet respectively with the magnetic pole of described rotor between compartment relative.

4, shutter device as claimed in claim 3 is characterized in that: dispose permanent magnet 61 between the described field magnet 50,52.

5, shutter device as claimed in claim 1 is characterized in that, described linear pulse motor comprises the ring-shaped rotor 12 that is contained in rotationally around the cylindrical portions may 4, and is configured in the stator 48 around this rotor 12;

Certain interval of the outer peripheral face of described rotor 12 is divided into levels, be formed with a plurality of N utmost point 46a on its upper strata, and its lower floor is formed with a plurality of S utmost point 46b, and these magnetic poles are in fact outstanding outwardly at the radial direction of described rotor with the interval that equates respectively;

Described stator 48 comprises respectively two armatures (54 respectively, 56,58 and 60) two field magnets 50 that constituted, 52 are wound with lead mutually separately, each armature 54,56,58 and 60 end correspondingly are divided into levels with the magnetic pole that is divided into the described rotor of levels, in each layer of described end, in fact be formed with along the said rotor radius direction inboard several outshots that extend, the several outshots mutual cross-over configuration of aforesaid levels corresponding with described rotor magnetic pole;

In the field magnet of described field magnet, the outshot on the upper strata of an armature is extremely relative with described rotor N, lower floor's outshot is relative with compartment between the described rotor S utmost point, and another armature upper strata outshot is relative with the interval of described rotor N interpolar, and lower floor's outshot is extremely relative with the S of described rotor;

In another field magnet, the outshot on an armature upper strata overlaps relative with 1/4 partitioned portion in the rotor N utmost point and left side thereof, the S utmost point of lower floor's outshot and described rotor with and 1/4 spacing on right side partially overlap relative, and the upper strata outshot of another armature is relative with the 1/4 compartment coincidence on the described rotor N utmost point and right side thereof, and lower floor's outshot overlaps relative with 1/4 compartment in the described rotor S utmost point and left side thereof.

6, shutter device as claimed in claim 5 is characterized in that, configuration permanent magnet 61 between the described field magnet 50,52.

7, shutter device as claimed in claim 1, it is characterized in that, the driving of the described exposure regulating ring 8 that is caused by aforementioned linear pulse motor is by described regulating ring 8 is connected with the moving part of linear pulse motor, realizes ground along the more than one bar slightly 44 that the axial direction of described cylindrical portions may 4 extends.

8, shutter device as claimed in claim 1, it is characterized in that described lens interlinked mechanism 38 is by constituting at the formed forked outshot of the periphery of described focal adjustments ring 10 and with the lever 90 that the moving lens of this outshot and lens barrel 88 couples together.

9, shutter device as claimed in claim 1 is characterized in that, described resetting-mechanism 43 is arranged on the tension spring between described focal adjustments ring 10 and the described ring flange 6.

10, shutter device according to claim 1 is characterized in that, described stop mechanism comprises having the ratchet mechanism 42 that the periphery at described focal adjustments ring 10 forms; Have along acting on the often spring 24 of pressurization of the opposite direction of force direction on the described ratchet 20 being fixed in the ratchet 20 that is provided with detent 22 and pin 26 around the rotation axis on the described ring flange 6 rotationally with described release cam 16; Have the shim of making by magnetic material 28 with the otch 30 of the pins engages of described ratchet 20, and the electromagnet 32 that can attract shim 28;

If described release cam 16 is pushed described ratchet 20, then described detent 22 is released with the engagement of described ratchet mechanism;

If described electromagnet is by excitation, then because the tip 26 that the otch 30 of described shim 28 retrains described ratchet 20 has kept aforesaid releasing orientation.

11, shutter device according to claim 1 is characterized in that, the open mechanism of described shutter comprises roughly along described cylindrical portions may 4 radial directions and is formed on circular-arc fluting 62 on the ring flange 6; That is supporting pilot pin 80 rotationally on the described opposite survey face of described ring flange 6 leads arm 82; The torque spring 84 of leading arm 82 towards the frequent pressurization of described blade 64,66 locking directions to described is arranged; And cross one another the leading that is respectively formed on the blade 64,66 stitches 76,78;

Described pilot pin 80 connects successively leads seam 76; , 78 point of crossing and described circular-arc 62 configurations of cracking, and

If described exposure adjustment cam 14 is pushed described pilot pin 80, then described pilot pin 80 moves with described circular-arc fluting, thereby described blade 64,66 is rotated in opposite direction mutually.