CN101261349A - Lens drive device - Google Patents
Lens drive device Download PDFInfo
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- CN101261349A CN101261349A CNA2008100058331A CN200810005833A CN101261349A CN 101261349 A CN101261349 A CN 101261349A CN A2008100058331 A CNA2008100058331 A CN A2008100058331A CN 200810005833 A CN200810005833 A CN 200810005833A CN 101261349 A CN101261349 A CN 101261349A
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
- G03B3/10—Power-operated focusing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
- G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention provides a lens drive device which can enhance impact resistance and reduce starting current. The lens drive device includes a lens movable body provided with a lens and a drive mechanism for moving the lens movable body from a home position in an optical axis direction of the lens. The drive mechanism includes a magnet and a plurality of coils which is disposed so that the magnet is interposed in the optical axis direction of the lens. An electric current is supplied to the plurality of the coils in a reverse direction to a direction of an electric current, which is supplied to the plurality of the coils for moving the lens movable body, for restricting movement from the home position of the lens movable body.
Description
Technical field
The lens driver that the present invention relates to drive the past optical axis direction displacement of lens and make the picture imaging of the body that is taken.
Background technology
In recent years, along with the portable telephone of the band camera that loads camera is popularized, the chance of taking the various bodies that are taken with this portable telephone increases.For example, sometimes or take friend, landscape etc. and leave the camera lens body that is taken (commonness photograph) to a certain degree, or take bus timetable, flowers etc. and be in the body that is taken (close-perspective recording photography) with the approaching position of camera lens.
During close-perspective recording photography (grand photography), in the time of need making the lens position of camera form than commonness photograph near the position of the body that is taken.Therefore, in this Photographical lens system, possess the driving mechanism that drives the past optical axis direction displacement of lens, and utilize the switching of switch to drive this driving mechanism, make lens move (for example referring to Patent Document 1) toward optical axis direction.
The lens driver that patent documentation 1 discloses utilizes the electromagnetic force of switching in the coil and producing, and the lens supports body is moved toward the optical axis direction of lens.And, under the cold state of coil, utilize 2 springs that the lens supports body is pushed against on the pedestal.Like this, when not using camera, make the positioning and fixing of lens, wave or rock, and then impact resistance is improved so the lens supports body is not easy to produce.
Patent documentation 1: the spy opens 2005-128392 communique (paragraph 0014)
Yet, prevent waving or rocking of said lens supporter reliably, need further to improve the intensity of 2 springs, but when doing like this, produce the electric current (starting current) that makes the lens supports body begin to move and become big disadvantage.That is, in the lens driver that above-mentioned patent documentation 1 discloses, the lens supports body is fixed on the origin position of regulation and reduces starting current incompatible, difficult both functions of performance.
The present invention finishes in view of above-mentioned aspect, and its purpose is, provides a kind of and can simultaneously make the lens driver that impact resistance improves and one side reduces starting current.
Summary of the invention
In order to solve above-mentioned problem, the invention provides following lens driver.
(1) a kind of lens driver has the lens moving body that possesses lens; The driving mechanism that described lens moving body is moved toward the optical axis direction of lens from the origin position of regulation; And with described lens moving body support the fixed body that can move toward the optical axis direction of lens, a plurality of coils that described driving mechanism possesses magnet and is configured to get involved at the optical axis direction of lens this magnet, wherein, described magnet or both sides of described a plurality of coil are arranged on described lens moving body, also the opposing party is arranged on described fixed body simultaneously, and, limit described lens moving body and leave moving of described origin position by the opposite electric current of direction of circulation when described a plurality of coil midstreams lead to direction and described lens moving body is moved.
According to the present invention, the lens driver setting make driving mechanism that the lens moving body moves toward the optical axis direction of lens and with the lens moving body support the fixed body that can move toward the optical axis direction of lens, driving mechanism possesses magnet and a plurality of coil.And, the opposite electric current of direction by circulation when described a plurality of coil midstreams lead to direction and the lens moving body is moved, restriction lens moving body leaves moving of described origin position, so when circulating this electric current, the lens moving body can stop at the origin position of regulation.Its result, the lens moving body is not easy to produce and waves or rock, and then can improve impact resistance.The lens moving body is not easy to produce and waves or rock, and then can make the noise elimination raising again.
In addition, the present invention is the opposite electric current of direction by circulating when the lens moving body is moved in the logical direction of a plurality of coil midstreams also, restriction lens moving body leaves moving of described origin position, so can reduce the electric current (starting current) that makes the lens moving body begin to move.Specifically, in the lens driver that existing patent documentation 1 discloses, improve impact resistance, then must strengthen the intensity of 2 springs to a certain degree, thereby lens supports body difficulty works, exist starting current to become big disadvantage.Yet, as indicated above according to the present invention, can limit moving of lens moving body by making current reversal, so, also can suppress its intensity low and the raising impact resistance, and then can reduce starting current even for example use under the situation of 2 springs.Moreover, among the present invention, there is not special member such as spring passable yet, can help to cut down manufacturing cost in the case.
Here, " origin position of regulation " is meant the position of the lens moving body under cold state in a plurality of coils, can be 1 position being scheduled to, also can be a plurality of positions of being scheduled to.Again, " origin position " so long as in lens driver, any position can.For example, leave the body position farthest that is taken in can moving range and be used as origin position, origin position can be used as in the position of the most close body that is taken again the lens moving body.In addition, centre position (position under the lens moving body vacant state) can also be used as origin position.
And " moving of origin position left in restriction " is meant that the lens moving body will stop at origin position; Hereinafter will set forth, can move by being pressed into adjacency section restriction, also can utilize act on and afterburning member between effect, reacting force restriction move, no matter its state is how.
Again, time (conduction time) or timing (energising regularly) about " the opposite electric current of direction of circulation when a plurality of coil midstreams lead to direction and the lens moving body is moved " can be any state.For example, be provided with in the lens driver under the situation of the sensor of surveying external force, can be when this sensor detect external force, this electric current circulates.And, also can be with this current flowing certain hour (for example be passed to described sensor do not detect external force till), this electric current that can circulate at regular intervals again (energising at interval), but logical this electric current (normal open) of permanent current also.
Moreover, can will constitute the magnet of " driving mechanism " and the either party that a plurality of coil is located at lens moving body and fixed body.For example, when magnet is located at the lens moving body, a plurality of coils are located at fixed body; When a plurality of coils are located at moving body, magnet is located at fixed body.
(2) a kind of lens driver, wherein, the adjacency section of moving that possesses the described lens moving body of restriction, and during the opposite electric current of the direction that circulates when described lens moving body is moved of the logical direction of described a plurality of coil midstream, described lens moving body is pressed into described adjacency section.
According to the present invention, the adjacency section of moving of restriction lens moving body is set in the said lens drive unit, and during the electric current that the direction of circulation was opposite when a plurality of coil midstreams led to direction and the lens moving body is moved, the lens moving body is pressed into described adjacency section, so can further improve impact resistance reliably.That is, limit it and move,, also be not easy to make the lens moving body to produce and wave or rock, and then can further improve impact resistance even then external force works by the lens moving body being pressed into the adjacency section.Moreover, be provided with " adjacency section " the position the size of " no matter adjacency section ", shape etc. how.For example, the part of fixed body is worked as the adjacency section.
(3) a kind of lens driver, wherein, described driving mechanism possesses the afterburning member of described lens moving body toward described origin position backup.
According to the present invention, above-mentioned driving mechanism possesses the afterburning member of lens moving body toward the origin position backup, so can one side guarantee that when commonness photograph impact resistance, one side stop at the lens moving body with little starting current the position of hope when grand photography.That is, the position of acting force equilibrium that can be by regulating electromagnetic force that a plurality of coil supplying electric currents are produced and afterburning member makes the lens moving body stop at the position of hope.
(4) a kind of lens driver, wherein, described driving mechanism possesses the magnetic component that is subjected to described magnet magnetic attachment.
According to the present invention, above-mentioned driving mechanism possesses the magnetic component that is subjected to the magnet magnetic attachment, so act on magnetic attraction between magnetic component and the magnet.Thereby, during commonness photograph when not using camera (or), can utilize this magnetic attraction to improve impact resistance.Moreover even " magnetic component " among the present invention also can improve impact resistance during the electric current that direction of circulating direction and the lens moving body is moved time circulation is not opposite.As " magnetic component ", or be spherical, or be ring-type, no matter its restriction, size, material are how.
(5) a kind of lens driver wherein, forms described magnetic component spherical.
According to the present invention, above-mentioned magnetic component forms spherical, so for example utilize the quantity that changes magnetic component, regulates magnetic attraction easily.As a result, combine, can realize best impact resistance with " the opposite electric current of direction of direction when the lens moving body is moved ".Moreover spherical " magnetic component " can be made inexpensive and simply, and has the advantage of the lens driver of packing into easily.
According to lens driver of the present invention, when commonness photograph for example under situation such as when not using camera (or), the opposite electric current of direction of circulation when a plurality of coil midstreams lead to direction and the lens moving body is moved is so electric current (starting current), the one side that can simultaneously reduce to make the lens moving body begin to move improve impact resistance.
Description of drawings
Fig. 1 is the cut-open view of mechanical composition that the lens driver of embodiment of the present invention is shown.
Fig. 2 is the figure of composition usefulness of the leaf spring of explanation lens driver shown in Figure 1.
Fig. 3 is the exploded perspective view that the assemble method of the lens driver of explanation embodiment of the present invention is used.
Fig. 4 is the key diagram that the situation that moves of restriction sleeve in the explanation lens driver is used.
Fig. 5 is the figure that the example when packing lens driver into portable telephone is shown.
Fig. 6 is the exploded perspective view of mechanical composition that the lens driver of embodiment of the present invention is shown.
Label declaration
The 10th, lens driver, the 11st, anti-guard housing, the 12nd, lens barrel, 12a are to regulate, 13,13 ' is leaf spring, 14,14 ' is the 1st coil, the 2nd coil, the 15th, and sleeve, the 16th, yoke, the 17th, magnet, the 18th, entrance window, the 19th, seat holds, and 19a is the adjacency section, the 30th, magnetic component.
Embodiment
Below, implement the best mode that the present invention uses with reference to description of drawings.
[mechanical composition]
Fig. 1 is the cut-open view of mechanical composition that the lens driver 10 of embodiment of the present invention is shown.Moreover, among Fig. 1, for convenience of description, the top is used as the front side of the close body that is taken.Fig. 2 is the figure of composition usefulness of the leaf spring 13 ' of explanation lens driver 10 shown in Figure 1.Fig. 3 is the exploded perspective view that the assemble method of the lens driver 10 of explanation embodiment of the present invention is used.
Among Fig. 1～Fig. 3, anti-guard housing 11 and the seat that lens driver 10 mainly comprises a part that is equivalent to fixed body holds 19, is equivalent to the sleeve 15 of the part of lens moving body.As shown in Figure 3, the lens barrel 12 cylindraceous in fact (Fig. 1 is not shown) that optical axis is arranged in its center is installed, is possessed lens 12a in the inside of this lens barrel 12 in the inside of sleeve 15.Moreover lens 12a generally constitutes in the mode that makes up a plurality of lens.
Anti-guard housing 11 and seat hold 19 and can embed, and support sleeve 15 to such an extent that can move toward the optical axis direction of lens 12a.Again, hold by anti-guard housing 11 and seat 19 yoke cylindraceous 16 is fixing.And, the fixing magnet 17 that forms ring-type on the inner peripheral surface of this yoke 16.That is, magnet 17 is fixed on yoke 16 from the inner peripheral surface of yoke 16 and stretches out toward the inboard.Moreover magnet 16 is magnetized in the direction with the optical axis direction quadrature of lens 12a.And yoke 16 is made of ferromagnetism bodies such as for example steel plates.
In the periphery of sleeve 15, fixing the 1st coil 14 that forms ring-type in the front side is at fixing the 2nd coil 14 ' that forms ring-type of rear side.That is, in the periphery of sleeve 15, in the front side of magnet 17 the 1st coil 14 is configured to this magnet 17 opposedly, and the 2nd coil 14 ' is configured to owing to get involved magnet 17 with the relation of the 1st coil 14 at optical axis direction.Its result, the front end face of the rear end face of the 1st coil 14 and magnet 17 is opposed, and the rear end face of the front end face of the 2nd coil 14 ' and magnet 17 is opposed.Moreover the 1st coil 14 and the 2nd coil 14 ' that are fixed on the sleeve 15 can relatively move to the optical axis direction of yoke 16 toward lens 12a.
The magnetic flux that sends from the N utmost point of magnet 17 returns magnet 17 more for example by sleeve the 15, the 1st coil 14, yoke 16.The magnetic flux that sends from the N utmost point of magnet 17 returns magnet 17 more again for example by sleeve the 15, the 2nd coil 14 ', yoke 16.Thereby, form magnetic loop (magnetic circuit) by the 1st coil the 14, the 2nd coil 14 ', yoke 16, sleeve 15 these members.In the case, as the material of sleeve 15, the most handy magnetic material.
Distance between the opposed faces of the 1st coil 14 and the 2nd coil 14 ' is greater than the thickness of the optical axis direction of magnet 17, between magnet 17 and the 1st coil 14 (or the 2nd coil 14 '), produce the gap toward optical axis direction, so that in this gap, the sleeve 15 that is integrated with the 1st coil 14 and the 2nd coil 14 ' can move toward optical axis direction.
Central authorities in the front side of preventing guard housing 11 are provided with the entrance window 18 that the reflected light from the body that is taken is taken into the circle of lens 12a (with reference to figure 3) usefulness.In the lens driver 10, the leaf spring 13 that moves and the leaf spring 13 ' (omitting leaf spring 13 among Fig. 1) of restriction sleeve 15 is set also.With Fig. 2 detailed description leaf spring 13 ' wherein.
Among Fig. 2, be contained in a leaf spring 13 ' that holds on 19 and cooperate with the present anti-spin slot that holds on 19 of formation.Utilize this cooperation, prevent leaf spring 13 ' rotation.
Leaf spring 13 ' is the metal spring of copper class or Phosphorus circulating currents such as magnetic stainless steel for example, in the rear end of the most inboard circumferential section 13 ' a carrying sleeve 15.And, form 3 terminal 13 ' b at circumferential section 13 ' a to the 2nd coil 14 ' energising usefulness, can be by terminal 13 ' b to the 2nd coil 14 ' supplying electric current.
Moreover, detailed here, but leaf spring 13 is formed terminal to the 1st coil 14 energising usefulness too, can be by this terminal at the 1st coil 14 circulating currents.Thereby, leaf spring 13 and leaf spring 13 ' are worked as the wiring of the 1st coil 14 and the 2nd coil 14 ' energising usefulness, and make the wiring of lens driver 10 convenient, can seek whole lens driver 10 miniaturizations.
Spherical magnetic component 30 is configured in the opposition side of magnet 17, the part of sleeve 15 is clipped in the middle.Thereby, act on magnetic attraction between magnetic component 30 and the magnet 17, sleeve 15 can be fixed (limiting it moves) (origin position) in the position shown in the figure 1.Describe this limit movement in " limit movement " of setting forth later in detail.
[assemble method]
The assemble method of lens driver 10 then, is described with Fig. 3.Among Fig. 3, lens driver shown in Figure 1 10 is shown schematically, and omits spherical magnetic component 30 etc.And, make the 1st coil 14 and the 2nd coil 14 ' predetermined fixed periphery at sleeve 15, and pack into the in advance inside of sleeve 15 of the lens barrel 12 that will have a lens 12a.Make the inner peripheral surface of magnet 17 predetermined fixed in yoke 16 again.Moreover magnet 17 adds the crack toward optical axis direction, thereby can be divided into 4.
Among Fig. 3, at first, seat is held 19 be mounted to leaf spring 13 ' and form the present anti-spin slot that holds on 19 and cooperate.Secondly, intervention magnet 17 between bonding four the magnet 17 of being divided on yoke 16, the 1st coil 14 that makes the periphery that is fixed on sleeve 15 and the 2nd coil 14 '.Then, packed in inside fixing present the holding on 19 of yoke 16 of sleeve 15.At this moment, the rear end of sleeve 15 is carried on the most inboard circumferential section of leaf spring 13 '.At last, carrying is leaf spring 13, make the front end of its most inboard circumferential section contact sleeve 15 after, will prevent guard housing 11 and hold 19 and cooperate.Like this, can assemble lens driver shown in Figure 1 10.Moreover leaf spring 13 and leaf spring 13 ' are gone up toward radial outside and are formed ligule part (with reference to figure 3), and this part is the power supply of coil.
The detailed condition of the current supply unit that omission connects about this power supply, but under the situation of the portable telephone of be with camera of for example lens driver 10 being packed into, the control module that is in the inside of the portable telephone of being with camera becomes the current supply unit; Lens driver 10 is packed under the situation of digital camera, and the control module that is in digital camera inside becomes the current supply unit.Like this, this power supply is connected to the control module of high-end devices.So this control module carries out current supply in predetermined timing (being opportunity to receive trigger pip from the sensor of surveying external force for example) to coil.Certainly, control module can freely switch the sense of current of circulation in the 1st coil 14 and the 2nd coil 14 '.For example, control module can be an opportunity with above-mentioned reception trigger pip, with current supply the 1st coil 14 and the 2nd coil 14 ' of prescribed direction.
[limit movement]
Fig. 4 is the key diagram that the situation that moves of restriction sleeve 15 in the explanation lens driver 10 is used.Moreover, among Fig. 4, for convenience of description, identical with Fig. 3, also with lens driver shown in Figure 1 10 diagrams (especially simplify magnetic component 30 near part, the 1st coil 14 and the 2nd coil 14 '), and the mechanical composition the when right half part that is conceived to optical axis is shown.And it is the N utmost point that magnet 17 is magnetized into radial inward, and radial outward is the S utmost point.
Among Fig. 4 (a), the magnetic flux that sends from the N utmost point of magnet 17 is with the order break-through of sleeve 15 → the 1st coil 14 → yoke 16.The magnetic flux that sends from the N utmost point of magnet 17 is again with the order break-through of sleeve 15 → the 2nd coil 14 → yoke 16.Under this state, among Fig. 4, at the 1st coil 14 and the 2nd coil 14 ' the equidirectional electric current (for example from " inside " of paper past " front portion " circulating current) that circulates, so place the 1st coil 14 of switching on and the 2nd coil 14 ' in magnetic field to bear up the electromagnetic force F of (front side) respectively
H(No.1) with reference to the arrow among the figure 4 (a).Thereby the sleeve 15 that sets the 1st coil 14 and the 2nd coil 14 ' is side shifting forward.
Moreover, in the present embodiment, energising is set with wiring 20 at sleeve 15, the electric current of circulation in the 1st coil 14 and the 2nd coil 14 ' is equated, so the 1st coil 14 and the 2nd coil 14 ' are gone up the electromagnetic force F that effect equates in fact
HBecause whole lens driver 10 is little, can think to equate in fact with magnetic flux by the 2nd coil 14 ' by the magnetic flux of the 1st coil 14 again.
Produce on the other hand, between the front end of leaf spring 13 and sleeve 15, power (the elastic force F that moves of restriction sleeve 15 between the rear end of leaf spring 13 ' and sleeve 15 respectively
S1, elastic force F
S2) (arrow with reference to figure 4 (a) is No.1).Therefore, among Fig. 4 (a), make the sleeve 15 electromagnetic force F of side shifting forward
H+ F
HThe elastic force F that moves with restriction sleeve 15
S1+ F
S2Equilibrium stops sleeve 15.
Then, when grand photography switches to commonness photograph (not using camera), lens driver 10 from the state transitions shown in Fig. 4 (a) to the state shown in Fig. 4 (b).Specifically describe: under the 1st coil 14 and the 2nd coil 14 ' the cold state, do not act on above-mentioned electromagnetic force F on the 1st coil 14 and the 2nd coil 14 '
HSo, the elastic force F of leaf spring 13 and leaf spring 13 '
S1, F
S2Make sleeve 15 return the source position.
So, act on the magnetic attraction F between magnetic component 30 and the magnet 17
M1And F
M2Sleeve 15 is maintained.Thereby, can prevent from that sleeve 15 from producing to wave or rock, and then the deviation of the rest position precision of lens moving body such as when not using camera (or) lens 12a or lens barrel 12 can suppress commonness photograph the time.
Especially in the present embodiment, " origin position " is used as in the position (with reference to figure 4 (b)) (position of the sleeve 15 under the 1st coil 14 and the 2nd coil 14 ' the cold state) of the sleeve 15 of when not using camera (or) during with commonness photograph.Then, apply that the equipment that makes the lens driver 10 of packing into falls or some external force such as this vibration equipment (no matter the external force factors such as influence of the influence in the influence of vibrating motor, magnetic field, electric wave how), taking this as an opportunity, the opposite electric current of direction (sense of current of circulation among Fig. 4 (a)) of circulating direction and sleeve 15 is moved time circulation then is pressed into rear side with sleeve 15 in the 1st coil 14 and the 2nd coil 14 '.
Specifically describe: present hold that to form with leaf spring 13 ' on 19 be the adjacency section 19a of the rear end of intermediary's bearing sleeve 15, the opposite electric current of direction (sense of current that circulates among Fig. 4 (a)) of circulating direction circulation when sleeve 15 is moved then produces direction and the opposite electromagnetic force F of direction shown in Fig. 4 (a) in the 1st coil 14 and the 2nd coil 14 '
HR, be intermediary with leaf spring 13 ', sleeve 15 is pressed into adjacency section 19a.As a result, even sleeve 15 is subjected to the external force effect, also be not easy to produce and wave or rock, and then moving of origin position is left in restriction.Moreover, as indicated above, also utilize the magnetic attraction F of magnetic component 30
M1And F
M2Restriction sleeve 15 leaves moving of origin position.And leaf spring 13 and leaf spring 13 ' toward the origin position backup, leave the moving of origin position so utilize their effect also to limit sleeve 15 with sleeve 15.
[effect of embodiment]
Illustrated as mentioned, lens driver 10 according to present embodiment, the situation of the electric current that the direction of circulation is opposite when having the 1st coil 14 and the 2nd coil 14 ' middle circulating direction and sleeve 15 being moved, therefore during this electric current of actual circulation, sleeve 15 can stop at the origin position (with reference to figure 4 (b)) of regulation.Its result makes sleeve 15 be not easy to produce and waves or rock, and then can improve impact resistance.Especially be intermediary with leaf spring 13 ', the rear end of sleeve 15 be pressed into adjacency section 19a, so can further prevent waving or rocking of sleeve 15 reliably.And, can prevent to wave or rock, then also can prevent to produce the extraordinary noise of " snapping snapping ", and then can improve noise elimination.
Again, in the lens driver 10 of present embodiment, can the mobile of sleeve 15 be restricted by the electric current of adjusting circulation in the 1st coil 14 and the 2nd coil 14 ', even so improve under the situation of impact resistance, also can reduce the intensity magnetic of magnetic component 30 (and can weaken) of leaf spring 13 and leaf spring 13 ', and then can reduce starting current (thereby helping the low consumption electrification).
And, in the time of the opposite electric current of the direction of the 1st coil 14 and the 2nd coil 14 ' circulating direction and sleeve 15 is moved time circulation, the size of this electric current is set at optimum value, thus can the great restraint of corrective action (the electromagnetic force F shown in Fig. 4 (b)
HR).So, can utilize easy setting operation, set the current value make the starting current that sleeve 15 begins to move.
As the driving mechanism of lens driver 10, afterburning member (leaf spring 13,13 ') and spherical magnetic component (magnetic bead) 30 are set, thereby can easily sleeve 15 be remained on the origin position of regulation again.But, in the lens driver 10 of present embodiment, the special members (for example afterburning member or magnetic component 30) and nonessential such as spring of restriction sleeve 15 usefulness.Be not provided with under the situation of spring etc., help to cut down manufacturing cost.
[application examples]
Moreover, lens driver 10 not only can be packed into and is with the portable telephone of camera, and the various electronic equipments of packing into, for example the behind of PHS, PDA, bar code reader, slim digital camera, monitoring camera, car is confirmed with camera, is had the door of optics affirmation function etc.
Especially in the general portable telephone, the structure that drives the servocontrol formation of vibrating motor sends the servosignal that servomotor is connected when receiving the incoming signal of phone.When connecting this servomotor (when sending servosignal), may lens driver 10 be passed in vibration from servomotor.
Therefore, when starting servomotor, the opposite electric current of direction by circulating direction circulation when sleeve 15 is moved can limit sleeve 15 and leave the mobile of origin position, and then can improve impact resistance.With Fig. 5 in detail this purposes is described in detail.
Fig. 5 is the figure that the example when packing lens driver 10 into portable telephone 100 is shown.Fig. 5 (a) illustrates the notion of such use, and Fig. 5 (b) illustrates the hardware of portable telephone 100 and forms.Moreover it is an example that hardware shown in Fig. 5 (b) is formed, and the invention is not restricted to this composition.For example, among Fig. 5 (b), omit LCD, microphone or loudspeaker etc. are shown.
Shown in Fig. 5 (b), portable telephone 100 has CPU101, ROM102, EEPROM103, RAM104, operation push-button 105, power switch 106, communication process portion 107, lens driver 10, coil current control circuit 108, motor driving controling circuit 109 and servomotor 110.
CPU101 controls each one of portable telephone 100, takes on the control maincenter of portable telephone 100.CPU101 is an opportunity with portable telephone 100 energized, reads and carry out IPL (the Initial Program Loader: initial program loader (IPL)) that leaves ROM102 in.Then, when carrying out this IPL, read and carry out initialize routine, carry out the initialization of each one of portable telephone 100 from ROM102.When CPU101 finishes the execution of initialize routine, read and carry out OS (OperatingSystem: operating system) program from ROM102.
The CPU101 that is carrying out the OS program carries out various processing according to the signal of importing.For example, during holder's operating operation button 105 of portable telephone 100, the indication according to determine this holder from the signal of operation push-button 105 inputs meets the processing of this indication.
ROM102 deposits the above-mentioned various programs that CPU101 carries out, and for example deposits IPL, carries out the initialized initialize routine of each of portable telephone 100, the OS program of the whole portable telephone 100 of control.The data of EEPROM (EEPROM (Electrically Erasable Programmable Read Only Memo)) 103 storage control portable telephones 100 usefulness or/and the holder of storage portable telephone 100 converse or transfer the other side's the telephone number of transmitting-receiving or the table address register of e-mail address by telegram.RAM104 is the readable and writable memory that works as the operation area of CPU101, temporarily stores the data of the program use of CPU101 execution.
When CPU101 receives the signal of relevant incoming call from communication process portion 107, motor driving controling circuit 109 is sent the servosignal that servomotor is connected.So motor driving controling circuit 109 is an opportunity to receive this servosignal, drive servomotor 110 (connecting servomotor 110), provide vibration to portable telephone 100.
At this moment, CPU101 sends servosignal to motor driving controling circuit 109, and coil current control circuit 108 is sent the current switching signal.The opposite electric current of circulating direction when the coil current control circuit 108 of receiving this signal makes the 1st coil 14 of lens driver 10 and the 2nd coil 14 ' circulating direction and sleeve 15 is moved.Thereby, can estimate the timing of portable telephone 100 vibration, the sleeve 15 of lens driver 10 is limited in origin position, and then can prevents waving or rocking of sleeve 15.
Like this, when packing the lens driver 10 of present embodiment into portable telephone 100, the timing of waving or rocking that can vibrate and be easy to generate sleeve 15 with portable telephone 100 side by side is limited in origin position with sleeve 15, so can not add change and improve impact resistance with software mode (utilizing program) by the hardware composition.
Moreover the present invention also can be used for lens driver 1A shown in Figure 6.In the present embodiment, have the rectangle in fact of the housing that becomes lens driver rear magnetic yoke 16A, install corresponding to 4 magnet 51a～51d in each bight of interior all sides of this rear magnetic yoke 16A and on sleeve 15A, be mounted to magnet be positioned at optical axis direction up and down be wound as the 1st coil 52a and the 2nd coil 52b of rectangle in fact, and during circulating current, sleeve 15A moves up and down along optical axis direction among the 1st and the 2nd coil 52a, the 52b.Moreover, make magnet different with the outer circumferential side magnetizing direction in interior all sides.The position that possesses again sleeve 15A remains on magnetic bead 100a, the 100b that the imaging apparatus side is used, and leaves the retaining hole (not shown) that 1 group (2) keep magnetic bead to use at sleeve with the opposed bight of the body that is taken.And, on the side that is taken of rear magnetic yoke 16A anti-guard housing 110 is installed, also be provided with and be clamped to seat from anti-guard housing 110 and hold 19 and cover the outside mask 120 that is located at the hole on the sleeve.Moreover, about other parts, since same as the previously described embodiments, so omit explanation.
Again, the present invention also can form coil in the periphery of sleeve 15, and at the inner peripheral surface bonded magnet 17 of yoke 16, coil is opposed therewith at circumferencial direction to make it.Also can remain on position magnetic bead 100a, the 100b that the imaging apparatus side uses and replace for example ring-type magnetic sheet that on sleeve 15, is mounted close to magnet 17 sleeve 15A.
Industrial practicality
Lens driver of the present invention prevents from making the lens supports body to begin mobile starting current change as one side Greatly, simultaneously making the device of impact resistance raising, is useful.
Claims (10)
1, a kind of lens driver has:
The lens moving body that possesses lens;
The driving mechanism that described lens moving body is moved toward the optical axis direction of lens from the origin position of regulation; And
With described lens moving body support the fixed body that can move toward the optical axis direction of lens,
A plurality of coils that described driving mechanism possesses magnet and is configured to get involved at the optical axis direction of lens this magnet is characterized in that,
Described magnet or both sides of described a plurality of coil are arranged on described lens moving body, also the opposing party are arranged on described fixed body simultaneously, and
By the opposite electric current of direction of circulation when described a plurality of coil midstreams lead to direction and described lens moving body is moved, limit described lens moving body and leave moving of described origin position.
2, the lens driver described in claim 1 is characterized in that,
The adjacency section of moving that possesses the described lens moving body of restriction, and
During the opposite electric current of the direction that the logical direction of described a plurality of coil midstream circulates when described lens moving body is moved, described lens moving body is pressed into described adjacency section.
3, the lens driver described in claim 2 is characterized in that,
Described driving mechanism possesses the afterburning member of described lens moving body toward described origin position backup.
4, the lens driver described in claim 3 is characterized in that,
Described driving mechanism possesses the magnetic component that is subjected to described magnet magnetic attachment.
5, the lens driver described in claim 4 is characterized in that,
Form described magnetic component spherical.
6, the lens driver described in claim 1 is characterized in that,
Described driving mechanism possesses the afterburning member of described lens moving body toward described origin position backup.
7, the lens driver described in claim 6 is characterized in that,
Described driving mechanism possesses the magnetic component that is subjected to described magnet magnetic attachment.
8, the lens driver described in claim 7 is characterized in that,
Form described magnetic component spherical.
9, the lens driver described in claim 1 is characterized in that,
Described driving mechanism possesses the magnetic component that is subjected to described magnet magnetic attachment.
10, the lens driver described in claim 9 is characterized in that,
Form described magnetic component spherical.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007025767 | 2007-02-05 | ||
| JP2007025767 | 2007-02-05 | ||
| JP2007324158 | 2007-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101261349A true CN101261349A (en) | 2008-09-10 |
Family
ID=39837025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100058331A Pending CN101261349A (en) | 2007-02-05 | 2008-02-04 | Lens drive device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2008216976A (en) |
| KR (1) | KR20080073248A (en) |
| CN (1) | CN101261349A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923202A (en) * | 2009-06-09 | 2010-12-22 | 日本电产三协株式会社 | Lens driver |
| CN102135656A (en) * | 2010-01-26 | 2011-07-27 | 日本电产三协株式会社 | Lens driving device |
| CN102262280A (en) * | 2010-05-24 | 2011-11-30 | 思考电机（上海）有限公司 | Lens driving device, auto focus camera and mobile terminal device |
| CN102455481A (en) * | 2010-10-18 | 2012-05-16 | 三美电机株式会社 | Lens driving device |
| CN106814433A (en) * | 2015-12-01 | 2017-06-09 | 台湾东电化股份有限公司 | Lens driving device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013242447A (en) * | 2012-05-21 | 2013-12-05 | Tdk Taiwan Corp | Micro-lens focus structure |
-
2007
- 2007-12-17 JP JP2007324158A patent/JP2008216976A/en active Pending
-
2008
- 2008-02-04 CN CNA2008100058331A patent/CN101261349A/en active Pending
- 2008-02-05 KR KR1020080011570A patent/KR20080073248A/en not_active Application Discontinuation
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923202A (en) * | 2009-06-09 | 2010-12-22 | 日本电产三协株式会社 | Lens driver |
| CN102135656A (en) * | 2010-01-26 | 2011-07-27 | 日本电产三协株式会社 | Lens driving device |
| CN102135656B (en) * | 2010-01-26 | 2014-10-01 | 日本电产三协株式会社 | Lens driving device |
| CN102262280A (en) * | 2010-05-24 | 2011-11-30 | 思考电机（上海）有限公司 | Lens driving device, auto focus camera and mobile terminal device |
| CN102262280B (en) * | 2010-05-24 | 2013-03-27 | 思考电机（上海）有限公司 | Lens driving device, auto focus camera and mobile terminal device |
| CN102455481A (en) * | 2010-10-18 | 2012-05-16 | 三美电机株式会社 | Lens driving device |
| CN102455481B (en) * | 2010-10-18 | 2014-07-30 | 三美电机株式会社 | Lens driving device |
| CN106814433A (en) * | 2015-12-01 | 2017-06-09 | 台湾东电化股份有限公司 | Lens driving device |
| CN106814433B (en) * | 2015-12-01 | 2019-11-19 | 台湾东电化股份有限公司 | Lens driving apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080073248A (en) | 2008-08-08 |
| JP2008216976A (en) | 2008-09-18 |
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Open date: 20080910 |