CN1538603A - Electromagnetic driver and exposure reglation component using it - Google Patents
Electromagnetic driver and exposure reglation component using it Download PDFInfo
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- CN1538603A CN1538603A CNA2004100333133A CN200410033313A CN1538603A CN 1538603 A CN1538603 A CN 1538603A CN A2004100333133 A CNA2004100333133 A CN A2004100333133A CN 200410033313 A CN200410033313 A CN 200410033313A CN 1538603 A CN1538603 A CN 1538603A
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- magnetic loop
- movable part
- electromagnetic actuator
- yoke
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Abstract
Provided is a device in which a movable part is low in mass, and moreover, which can output a high torque. In a first magnetic circuit and a second magnetic circuit, both end sides of a shaft 7 are freely slidably supported by bearings 6A, 6B. Further, first yokes 4A, 4B, magnets 3A, 3B, and second yokes 5A, 5B are provided around the bearings 6A, 6B. Also, a driving coil 9 is provided around the shaft 7. The magnetic flux becomes large in one of the overlapped parts of a magnetic circuit generated at the start of the driving coil 9 and the first magnetic circuit or the second magnetic circuit, and the magnetic flux becomes small in the other overlapped part. As a result, the shaft 7 is moved in the direction to the portion where the magnetic flux is large.
Description
Technical field
The present invention relates to a kind of exposure adjustment means that is assemblied in the electromagnetic actuator on the vision facilities such as digital camera and uses this electromagnetic actuator, particularly small-sized and can obtain the electromagnetic actuator of high torque (HT) output and use its exposure adjustment means.
Background technology
In following patent documentation 1, record and narrate scheme relevant for the shutter device that is also used as aperture of camera.On this device, be provided with a plurality of blades of mutual synchronization action and the solenoid of described each blade of driving.On described solenoid, can freely support cored with advancing and retreat.In addition, on described iron core, be provided with force application component to the outstanding direction application of force.By to solenoid energising, and revolt the application of force of described force application component, each blade by removing solenoidal energising, just can utilize the application of force of described force application component that each blade is moved to closing direction to the direction action of opening.
In following patent documentation 2, show the electromagnetic actuator device that is assemblied on the optics.On this device, the peripheral part that is arranged on rotating member is provided with the stator of a pair of coil, with the rotor that the N utmost point and the S utmost point alternately are magnetized, and described rotor is by gear and described rotating member interlock.Described rotor can be supported between described stator and the stator with rotating freely.When to described each coil electricity, will make described rotor rotation, thereby make described rotating member rotation.
[patent documentation 1]
Te Kaiping 7-168246 communique
[patent documentation 2]
The spy opens the 2000-152595 communique
But therefore the device shown in the described patent documentation 1 can't be exported the amount of movement of iron core and the relation of intensity of torque, so the control of the amount of movement of iron core is very difficult linearly owing to use the member of solenoid and force application component and so on different qualities.In addition, therefore the device shown in the patent documentation 2 can produce sound owing to be the device that moving element is moved interimly when stepper drive, and the microphone of device assembled to(for) one can produce the problem that this sound imports microphone into.
In addition,, be provided with when reading in shot image data in the memory, block mechanism the exposure of CCD by closing mechanical shutter with the digital camera of CCD (charge coupled cell) as capturing element assembling.Under the state of having closed mechanical shutter, view data is recorded in the memory.When making the CCD exposure when opening in the record of mechanical shutter in data, can in view data, produce noise.So, in data record, open unintentionally in order to prevent described shutter, be necessary described shutter is driven under the state of the load that applies high torque (HT).
But, when with patent documentation 1 shown device output high torque (HT), be necessary to increase volume as the magnet of movable part, consequently, the device maximization that can become.
Summary of the invention
In order to solve described problem in the past, the object of the present invention is to provide small-sized, can drive and electromagnetic actuator that can Linear Driving and use its exposure adjustment means with high torque (HT).
Feature of the present invention is to have: can be in cylindrical shell reciprocatingly supported movable part, to described movable part provide actuating force driving mechanism, form the 1st magnetic loop at an end of described movable part, form the 2nd magnetic loop of magnetic circuit to another way at the other end of described movable part towards the magnetic circuit of a direction.
For example, described the 1st magnetic loop and the 2nd magnetic loop are made of the part of the 1st yoke, magnet, the 2nd yoke, described movable part respectively, and described the 1st magnetic loop and the 2nd magnetic loop dispose symmetrically with respect to the moving direction of described movable part.
Electromagnetic actuator of the present invention is owing to there is no need with coil or magnet as movable part, even therefore can increase the volume of magnet for example in order to improve torque output or increase the coiling number of coil, also can not increase the weight of movable part.So just the movable part of the enough low weights of energy is exported high torque (HT).In addition, can make the linear variation of relation for addendum modification and the holding torque or the attraction of movable part.
In addition, can for: described the 1st yoke, magnet and the 2nd yoke are the annular shape that each comfortable center has formed through hole, and described movable part can be inserted in described each through hole movably.
In addition, described cylindrical shell is made into to coat all shapes of described movable part, driving mechanism, the 1st magnetic loop and the 2nd magnetic loop.So just can strengthen the intensity that is formed at the magnetic flux in each magnetic loop.
In addition, the magnet of any one party of described the 1st magnetic loop and the 2nd magnetic loop is made into along the long shape of the moving direction of described movable part.So just can in the magnetic loop of a side of longer magnet, obtain bigger actuating force.
In addition, near at least one side of described the 1st magnetic loop and the 2nd magnetic loop, the detecting element of the intensity that can detect the magnetic leakage flux can be set also.So just can detect the position of movable part, and movable part is remained on midway the position.
In addition, the feature of exposure adjustment means of the present invention is: be provided with a plurality of vane members that move based on the action of the movable part of described electromagnetic actuator, described vane member can be set to the standard-sized sheet posture of open fully peristome and the full cut-off posture of complete closed peristome at least.
By using described electromagnetic actuator, just can carry out the action of vane member at a high speed, thereby for example can realize shutter speed at a high speed.
Description of drawings
Fig. 1 is the vertical view of an example of outward appearance of the electromagnetic actuator of expression embodiments of the present invention 1.
Fig. 2 is the cutaway view of the electromagnetic actuator of execution mode 1.
Fig. 3 is the schematic diagram of the flow direction in magnetic field of the electromagnetic actuator inside of expression execution mode 1.
Fig. 4 is the curve chart of expression to the relation of the attraction of axle and addendum modification.
The curve chart of the relation of Fig. 5 actuating force that to be expression produced by coil and addendum modification.
Fig. 6 is the cutaway view of the electromagnetic actuator of expression embodiments of the present invention 2.
Fig. 7 is the curve chart with respect to the variation of the actuating force of addendum modification of the electromagnetic actuator of expression execution mode 2.
Fig. 8 is the cutaway view of variation of the electromagnetic actuator of expression execution mode 1.
Fig. 9 is the vertical view of an example of expression exposure adjustment means of the present invention.
Among the figure, R2, R5: the 1st magnetic loop; R3, R6: the 2nd magnetic loop; 1,10,20: electromagnetic actuator; 2,11,21: cylindrical shell; 3A, 3B, 13A, 13B: magnet; 4A, 4B, 14A, 14B: the 1st yoke; 5A, 5B, 15A, 15B: the 2nd yoke; 3a, 4a, 5a: through hole; 7,17: rotating shaft (movable part); 8: arm; 9: drive coil (driving mechanism)
Embodiment
Fig. 1 is the vertical view of an example of the outward appearance of expression electromagnetic actuator of the present invention, Fig. 2 is the cutaway view of electromagnetic actuator, Fig. 3 is the schematic diagram of the flow direction in the magnetic field of expression electromagnetic actuator inside, Fig. 4 is the curve chart of expression to the relation of the attraction of axle and addendum modification, the curve chart of the relation of Fig. 5 actuating force that to be expression produced by coil and addendum modification.
As shown in Figure 1, the electromagnetic actuator 1 of present embodiment has cylindrical shell 2 cylindraceous.Cylindrical shell 2 is made by magnetic raw material such as iron or ferrites.In addition, on cylindrical shell 2, form the tetragonal opening 2a that connects along its flexure plane.
As shown in Figure 2, in the X1 of described cylindrical shell 2 side and X2 side, be respectively equipped with the magnet 3A, the 3B that make with permanent magnet.Each magnet 3A, 3B be in be formed centrally circular through hole 3a, the annular of 3b.Between described cylindrical shell 2 and magnet 3A, 3B, be provided with the 1st yoke 4A, 4B, with the fixing described cylindrical shell 2 of the state between the 1st yoke 4A, 4B are clipped in and described magnet 3A, 3B.
Described the 1st yoke 4A, 4B be in be formed centrally the circular plate shape of through hole 4a, 4b.On the lateral surface of the ring-type of the X1 side of described magnet 3A, 3B and X2 side, be fixed with the 2nd yoke 5A, 5B.The 2nd yoke 5A, 5B are formed with the diameter through hole 5a bigger than described through hole 4a, 4b, the circular plate shape of 5b.And described the 1st yoke 4A, 4B and the 2nd yoke 5A, 5B are also identical with described cylindrical shell 2, are made by magnetic materials such as iron or ferrites.
As shown in Figure 2, among through hole 3a, the 3b on being formed at described magnet 3A, 3B, insert bearing 6A, the 6B of ring-type respectively.The outside dimension of described bearing 6A, 6B is identical or roughly the same with the internal diameter size of described magnet 3A, 3B, and described bearing 6A, 6B are fixed with the state that is entrenched among described magnet 3A, the 3B.And though as shown in Figure 2, described bearing 6A, 6B are sliding bearing, are not limited thereto, and also can be ball bearings for example.In addition, the material of bearing can be selected from the material that forms with high rigidity synthetic resin or metal material.
And in the present embodiment, as shown in Figure 2, the face when described magnet 3A, 3B, the 1st yoke 4A, 4B, the 2nd yoke 5A, 5B and bearing 6A, 6B formation are cut with respect to the center line O-O line with X-direction is the shape of symmetry.
In columned axis hole 6a, the 6b of described bearing 6A, 6B, the bar-shaped rotating shaft 7 that insertion can move freely along X-direction.Rotating shaft 7 is made by magnetic materials such as iron.In addition, the length dimension of rotating shaft 7 as shown in Figure 1, and is shorter than the size L from the 2nd yoke 5A to 5B, and is made into to insert simultaneously the size among axis hole 6a, the 6b of described bearing 6A, 6B.And described rotating shaft 7 is the movable parts in the present embodiment.
In addition, on described rotating shaft 7,, be fixed with edge and axial vertically extending arm 8 than more close X2 one side of center O-O line.This arm 8 is made into from being formed at the outwards outstanding length dimension of opening 2a on the described cylindrical shell 2, and described arm 8 is with can be supported to the mode that the X1-X2 direction moves.And this arm 8 is sized to: when the X1 direction moves to maximum position, rotating shaft 7 can not extracted from bearing 6B, and when the X2 direction moves to maximum position, rotating shaft 7 can not extracted from bearing 6B yet.
As shown in Figure 2, in the inboard of described cylindrical shell 2, around described rotating shaft 7, be provided with the drive coil 9 that the driving mechanism as present embodiment plays a role.This drive coil 9 forms by wire rods such as the copper cash of reeling around described rotating shaft 7.In addition, described drive coil 9 is positioned at the X1 side than described opening 2a.At this moment, drive coil 9 can not contact with rotating shaft 7, and the end of the X1 side of drive coil 9 is fixed on the face of X2 side of described the 1st yoke 4A.And, described drive coil 9 also can be with wire coils such as copper cash on plastic bobbin, described bobbin and drive coil are fixed on the structure on described the 1st yoke 4A.
To the action of the electromagnetic actuator 1 of present embodiment be described below.
As shown in Figure 3, described magnet 3A is magnetized to the S utmost point with the X1 side, and the X2 side is magnetized to the N utmost point, and described magnet 3B is magnetized to the N utmost point with the X1 side, and the X2 side is magnetized to the S utmost point.For described drive coil 9, with * a side that mark is represented is that the mode of side was switched in face of electric current flowed to from the paper rear side, a side of representing with the O mark is that electric current is switched on from the mode that the paper front side flows to rear side, so controls, and will produce the flow direction of the magnetic line of force of representing with solid line B1.That is, constitute magnetic loop R1 by drive coil the 9, the 1st yoke 4A, rotating shaft 7 and the 1st yoke 4B.
In addition, in the present embodiment, also can produce the magnetic flux of the ring-type of representing with dotted line B2, B3.That is, the S utmost point by the N utmost point, the 1st yoke 4A, rotating shaft the 7, the 2nd yoke 5A and the magnet 3A of magnet 3A constitutes the 1st magnetic loop R2 that represents with dotted line B2.In addition, the S utmost point by the N utmost point, the 1st yoke 4B, rotating shaft the 7, the 2nd yoke 5B and the magnet 3B of magnet 3B constitutes the 2nd magnetic loop R3 that represents with dotted line B3.
Surrounding among the tetragonal scope Q1 with the magnetic flux of magnetic loop R1 and the overlapping dotted line of magnetic flux of the 1st magnetic loop R2, since the magnetic line of force towards consistent with each other, therefore the intensity of the magnetic flux that produces in this scope Q1 is enhanced, on the contrary, in the overlapping scope Q2 of the magnetic flux of the magnetic flux of magnetic loop R1 and the 1st magnetic loop R2, since the magnetic line of force towards mutually oppositely, therefore the intensity of the magnetic flux that produces in this scope Q2 is weakened.So at this moment, on rotating shaft 7, the actuating force F that represents with arrow will have an effect.In addition, opposite by the sense of current that makes the drive coil 9 of flowing through in state shown in Figure 3 with described direction, just can make described actuating force F on rotating shaft 7, produce reverse actuating force.By rotating shaft 7 is moved towards the X1-X2 direction, arm 8 is also moved in opening 2a towards the X1-X2 direction.
When the position with the rotating shaft 7 of state shown in Figure 3 was reference position (addendum modification is zero), corresponding with the addendum modification (amount of movement) to the X1 direction when making rotating shaft 7 when the X1 direction moves, the attraction that rotating shaft 7 is pulled to the X1 direction became big.In addition, when make rotating shaft 7 from described reference position when the X2 direction moves, corresponding with the addendum modification (amount of movement) to the X2 direction, attraction increases.So, in the narrow range that addendum modification is represented for the symbol S shown in Fig. 4, can make attraction to rotating shaft 7 with respect to the linear variation of the addendum modification of rotating shaft 7.So can easily be rotated the Position Control of axle 7.
Present embodiment as shown in Figure 4, when the length dimension L1 of rotating shaft 7 is longer than the length of benchmark, will be shown in dotted line, for the recruitment Δ H of the attraction of the addendum modification of rotating shaft 7 (=b/a) can diminish.Promptly, when rotating shaft 7 is made when long, the size that the end of the X1 side of rotating shaft 7 enters in the bearing 6A becomes big, though rotating shaft 7 is subjected to increasing from the attraction of the 1st magnetic loop R2, but because the end of the X2 side of rotating shaft 7 remains in the bearing 6B also morely, therefore the attraction from the 2nd magnetic loop R3 that is subjected to can not reduce a lot, thereby attraction is less for the variation delta H of the addendum modification of rotating shaft 7.
In addition, when the length dimension L1 of rotating shaft 7 than the length dimension of benchmark in short-term, shown in heavy line, it is big that variation delta H becomes.Promptly, when rotating shaft 7 is made in short-term, the size that the end of the X1 side of rotating shaft 7 enters in the bearing 6A becomes big, the attraction from the 1st magnetic loop R2 that rotating shaft 7 is subjected to increases, and the end of the X2 side of rotating shaft 7 remains in the size decreases in the bearing 6B, so the attraction from the 2nd magnetic loop R3 reduces greatly, make attraction bigger than described for the variation delta H of the displacement of rotating shaft 7.
And the power that offers rotating shaft 7 in the present embodiment is making a concerted effort of attraction shown in Figure 4 and the power that produced by drive coil shown in Figure 59.As shown in Figure 5, the actuating force that offers rotating shaft 7 by drive coil 9 always is set to definite value or is roughly definite value.But, the actuating force that produces by drive coil 9 be set to can be also bigger than the maximum of described attraction output.This is because during the state that attracted to direction in retainer shaft, can prevent from not move round about.
Move to the end of X1 direction when rotating shaft 7, under the stable state of rotating shaft 7 generations with the attraction shown in the P1 point of Fig. 4, by drive coil 9 being provided the electric current that can produce the actuating force bigger, rotating shaft 7 is moved to the X2 direction than described attraction.At this moment, the actuating force that is produced by magnetic loop R1 surpasses the actuating force that is produced by the 1st magnetic loop R2, and to the X2 side shifting, rotating shaft 7 finally is moved into the end of X2 side with rotating shaft 7.And, under the situation of the end that rotating shaft 7 is moved to the X2 side from the end of X1 side, drive coil 9 little time of only switching on is got final product.
In addition, in the present embodiment, when rotating shaft 7 is in each end of X1 side and X2 side,, also rotating shaft 7 can be remained on its position even remove "on" position respectively.So just can under the no power state, make rotating shaft 7 produce 2 point of safes.
Fig. 6 is the cutaway view of the electromagnetic actuator of expression embodiments of the present invention 2.Fig. 7 is the curve chart of expression for the relation of the addendum modification of axle and confining force.
In the side of described magnet 13A, 13B, the 2nd yoke 14A, the 14B of fixed disc shape on described the 2nd yoke 14A, 14B, are formed centrally through hole 14a, 14b with described through hole 13a, 13b same diameter therein.
In described bearing 16A and 16B, the columned rotating shaft (movable part) 17 that insertion can be free to slide.Around described rotating shaft 17, be provided with drive coil 18, two ends of described drive coil 18 are fixed on described the 1st yoke 12A, the 12B.And, though also not shown, on rotating shaft 17, be fixed with edge and axial vertically extending arm, this arm can move along the X1-X2 direction.
In addition, form the 1st magnetic loop R5 by described magnet 13A, the 1st yoke 12A, the 2nd yoke 14A and rotating shaft 17.Form the 2nd magnetic loop R6 by described magnet 13B, the 1st yoke 12B, the 2nd yoke 14B and rotating shaft 17.Like this, offering the actuating force of rotating shaft 17 by the 2nd magnetic loop R6 will be bigger than the actuating force that is produced by the 1st magnetic loop R5.
Fig. 7 represents to have the movable range and the narrow scope of application of Bi Qi of rotating shaft 17, in the scope of application, becomes big mode according to the power to the X2 directive effect and sets.And movable range also can be identical scope with the scope of application.
Fig. 8 is the cutaway view of the variation of the described electromagnetic actuator 1 of expression.The cylindrical shell 21 that this electromagnetic actuator 20 is made with magnetic material to the end formation of X2 side from the end of X1 side, and be to form according to the mode that coats the 1st yoke 4A, 4B, magnet 3A, 3B and the 2nd yoke 5A, 5B.Coat by cylindrical shell 21, just can strengthen the magnetic flux density of the ring-type shown in dotted line B2, the B3 of Fig. 3, thereby can drive rotating shaft 7 effectively with this kind shape.And therefore other formation uses identical symbol owing to identical with electromagnetic actuator 1, and it illustrates omission.
In addition, in described electromagnetic actuator 1, as shown in Figure 3,, just can detect the position of rotating shaft 7 by assembling detecting element 40.This detecting element 40 is made of Hall element etc., is set on the position of facing mutually with the 2nd yoke 5A.When the position of rotating shaft 7 when the X1-X2 direction moves, magnetic resistance changes, magnetic flux promptly changes.For example, when rotating shaft 7 from position shown in Figure 3 when the X1 direction moves, it is big that magnetic flux B2 becomes.By the increase (or minimizing) that detects magnetic flux at this moment with described detecting element 40, just can detect the position of rotating shaft 7.By detecting the position of rotating shaft 7 like this, not only can be on 2 point of safes in end of the end of X1 side and X2 side, and can rotating shaft 7 be remained on its position midway by the drive current that offers drive coil 9 is controlled.Rotating shaft 7 is remained on the position more than 3.
Fig. 9 is the vertical view of an example of expression exposure adjustment means of the present invention.This exposure adjustment means can be applied to digital camera, Digital Video, have the portable phone of camera function, PC with in the vision facilitiess such as camera.
This exposure adjustment means 30 is made of the drive division 32 of described electromagnetic actuator 1 (or 10), vane member 31a, 31b, 31c, the described vane member 31a～31c of driving.
Described drive division 32 has the base portion 33 of ring-type, and described base portion 33 is fixed on the basket side of vision facilities.In the central authorities of this base portion 33, form circular peristome 33a, in addition, on the one side of described base portion 33, form outstanding aixs cylinder at interval with equal angles (120 degree) and play 34b, 34c, 34d.Around described base portion 33, be supported with the rotating member 35 of the ring-type that can rotate freely.On described rotating member 35, be formed with slotted hole 35a, 35b, 35c at interval with equal angles (120 degree).This slotted hole 35a, 35b, 35c form with aixs cylinder play 34b, 34c, 34d is the radian at center, and along the direction extension that intersects with the direction of rotation of rotating member 35.
Described vane member 31a～31c is identical shaped, has the 31a1 of switching portion, 31b1, the 31c1 of semicircle shape.And, integrally formed installation portion 31a2,31b2,31c2 on the described switching 31a1 of portion, 31b1,31c1, be fixed with guide pins 36a, 36b, 36c on described installation portion 31a2,31b2,31c2, this guide pins 36a, 36b, 36c can insert among described slotted hole 35a, 35b, the 35c with being free to slide.In addition, described installation portion 31a2,31b2,31c2 by described aixs cylinder play 34b, 34c, 34d can support freely to rotate.
The arm of being located on the described electromagnetic actuator 18 extends to described rotating member 35, and this rotating member 35 is connected with described arm 8 by axle 8a.And described axle 8a can move freely along the direction with the directions X quadrature with respect to rotating member 35.
With reference to Fig. 9 the action of the exposure adjustment means 30 of present embodiment is described below.Fig. 9 has shown that standard-sized sheet puts the state of the centre of state and full closeding state.
As shown in Figure 9, when making arm 8 when X1 direction straight line moves, rotating member 35 is along dextrorotation veer (W1 direction) rotation, guide pins 36a, 36b, 36c in slotted hole 35a, 35b, 35c by to direction guiding near the peripheral edge portion of base portion 33.Each vane member 31a, 31b, the 31c of this moment be to the direction of closing described peristome 33a, with aixs cylinder play 34b, 34c, 34d is fulcrum synchronously rotation mutually.And the 31a1～31c1 of switching portion of vane member 31a～31c overlaps, and described peristome 33a is closed.
In addition, when making arm 8 when X2 direction straight line moves, rotating member 35 is to being rotated counterclockwise direction (W direction) rotation, and guide pins 36a～36c is moved in the opposite direction along the side with described peripheral edge portion near base portion 33 in slotted hole 35a～35c.Utilize this action just can make each vane member 31a～31c mutually synchronously along the direction rotation of opening peristome 33a.
So, in the exposure adjustment means 30 of present embodiment, vane member 31a～31c can be set at the full-gear of all opening peristome 33a and the full-shut position of Close All peristome 33a.
In addition, under situation about exposure adjustment means 30 being assemblied on digital camera etc., described vane member 31a～31c is configured between CCD and the optical lens, can be set at full-gear that the integral body of peristome 33a is open and the full-shut position that the integral body of peristome 33a is closed.In this kind camera, in order to become the high camera of resistance to impact, promptly for Imagery Data Recording is being prevented from by mistake to open vane member in memory, as shown in Figure 6, asymmetricly form magnet 13A, 13B, get final product thereby improve towards the attraction of a direction (being closing direction in this case).Perhaps, also Fig. 1 can be made to the rotating shaft 7 of electromagnetic actuator 1 shown in Figure 13 shorter, thereby can not produce big attraction.So just can prevent with Imagery Data Recording in memory the time because of opening the situation that vane member causes the image quality deterioration unintentionally.
(invention effect)
As above the electromagnetic actuator of the present invention of explanation can obtain higher with the movable part of low weight Driving force, and can make addendum modification and driving force linear change for movable part.
In addition, light exposure adjustment means of the present invention is being assemblied on the vision facilities such as digital camera The time, can make the vane member high speed motion.
Claims (7)
1. electromagnetic actuator is characterized in that having:
Can be in cylindrical shell reciprocatingly supported movable part,
To described movable part provide actuating force driving mechanism,
An end of described movable part form the 1st magnetic loop towards the magnetic circuit of a direction,
Form the 2nd magnetic loop of magnetic circuit to another way at the other end of described movable part.
2. electromagnetic actuator according to claim 1, it is characterized in that: described the 1st magnetic loop and the 2nd magnetic loop are made of the part of the 1st yoke, magnet, the 2nd yoke, described movable part respectively, and described the 1st magnetic loop and the 2nd magnetic loop are with respect to the moving direction balanced configuration of described movable part.
3. electromagnetic actuator according to claim 2 is characterized in that: described the 1st yoke, magnet and the 2nd yoke are the annular shape that is formed with through hole respectively at the center, and can insert described movable part movably in described each through hole.
4. electromagnetic actuator according to claim 1 is characterized in that: described cylindrical shell is for coating all shapes of described movable part, driving mechanism, the 1st magnetic loop and the 2nd magnetic loop.
5. electromagnetic actuator according to claim 1 is characterized in that: the magnet of any one party of described the 1st magnetic loop and the 2nd magnetic loop is to form in the long mode of the moving direction of described movable part.
6. electromagnetic actuator according to claim 1 is characterized in that: near at least one side of described the 1st magnetic loop and the 2nd magnetic loop, be provided with the detecting element of the intensity that can detect leakage magnetic flux.
7. exposure adjustment means, it is characterized in that: be provided with a plurality of vane members that move based on the action of the movable part of the described electromagnetic actuator of claim 1, described vane member can be set to the standard-sized sheet posture of open fully peristome and the full cut-off posture of complete closed peristome at least.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003113739A JP2004320932A (en) | 2003-04-18 | 2003-04-18 | Electromagnetic actuator and exposure amount adjusting member using the same |
| JP2003113739 | 2003-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1538603A true CN1538603A (en) | 2004-10-20 |
Family
ID=33473546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100333133A Pending CN1538603A (en) | 2003-04-18 | 2004-04-02 | Electromagnetic driver and exposure reglation component using it |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004320932A (en) |
| CN (1) | CN1538603A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909343B (en) * | 2005-07-26 | 2010-12-22 | 佳能株式会社 | Driving device and light amount controller |
| CN103379416A (en) * | 2012-04-20 | 2013-10-30 | 日本电产精密株式会社 | Vibration generator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2884349B1 (en) * | 2005-04-06 | 2007-05-18 | Moving Magnet Tech Mmt | BITABLE POLARIZED ELECTROMAGNETIC ACTUATOR WITH QUICK ACTUATION |
| EP3982379A1 (en) * | 2020-10-08 | 2022-04-13 | The Swatch Group Research and Development Ltd | Micro-actuator with magnetically retracting solenoid |
-
2003
- 2003-04-18 JP JP2003113739A patent/JP2004320932A/en not_active Withdrawn
-
2004
- 2004-04-02 CN CNA2004100333133A patent/CN1538603A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909343B (en) * | 2005-07-26 | 2010-12-22 | 佳能株式会社 | Driving device and light amount controller |
| CN103379416A (en) * | 2012-04-20 | 2013-10-30 | 日本电产精密株式会社 | Vibration generator |
| CN103379416B (en) * | 2012-04-20 | 2018-02-13 | 日本电产精密株式会社 | Vibration generating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004320932A (en) | 2004-11-11 |
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