CN104423011B - Lens barrel - Google Patents
Lens barrel Download PDFInfo
- Publication number
- CN104423011B CN104423011B CN201410429178.8A CN201410429178A CN104423011B CN 104423011 B CN104423011 B CN 104423011B CN 201410429178 A CN201410429178 A CN 201410429178A CN 104423011 B CN104423011 B CN 104423011B
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- China
- Prior art keywords
- lens group
- lens
- translation
- optical axis
- holding frame
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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
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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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
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Adjustment Of Camera Lenses (AREA)
Abstract
The present invention provides a kind of lens barrel of the camera lens translation actuator with jitter correction, and it has：1st lens driving portion, it is to keeping translation to be driven with lens group and the camera lens translation with the translation of actuator with lens group holding frame；And the 2nd lens driving portion, it is pointed to the translation and is driven with the lens group of the image side of lens group holding frame, and the 2nd lens driving portion is configured in following location：It is overlapping with actuator with the camera lens translation positioned at inner side of the translation with lens group holding frame, and not in the case of from the direction along optical axis.
Description
Technical field
The present invention relates to scalable and translate (lens shift) with lens barrel of actuator with camera lens.
Background technology
In order to realize the miniaturization of the camera devices such as camera and video camera, for example, use sometimes in Japanese Unexamined Patent Publication 2012-
It can shorten the lens barrel of total length under non-photographic state disclosed in No. 78806 publications.In addition, keeping zoom lens to make
In the case of lens barrel for photographic optical system, it is desirable to not only realize miniaturization but also realize higher zoom ratio.
In addition, the lens barrel with the image shake correction function based on so-called camera lens translation mode is realized in recent years,
By making a part of lens group of composition photographic optical system be moved parallel to the plane perpendicular to optical axis, so that in imaging surface
On make as mobile.
In order that photographic optical system not only realizes miniaturization but also realizes higher zoom ratio, although for example it is contemplated that setting up
It is capable of the method for movable independently lens group, yet with for driving the quantity of the actuator of lens group to increase, thus mirror
The overall outer deformation of head lens barrel is big.Especially there is the lens barrel of the image shake correction function based on so-called camera lens translation mode
In the case of, the actuator translated for camera lens is also disposed in lens barrel, therefore is minimized increasingly difficult.
The present invention be exactly in view of the foregoing and complete, its object is to it is scalable and with camera lens translation activate
The shortening of total length when the lens barrel of device realizes shortening state.
The content of the invention
The lens barrel of one aspect of the invention keeps the photographic optical system being made up of multiple lens groups, in non-photographic
When can shorten total length, it is characterised in that the lens barrel has：Base portion, its position is relative to the photographic optical system
Image planes fix；Translation lens group, it is included in the lens group in the photographic optical system, by being hung down along with optical axis
Straight planar movement is carried out as the correction of shake；Cylindric translation lens group holding frame, it is disposed in the base portion
Object side, is moved while keeping the translation with lens group relative to the base portion along optical axis；1st lens driving
Portion, it drives the translation lens group holding frame along optical axis；Camera lens translation actuator, it is fixed on the translation with thoroughly
Microscope group holding frame, makes the translation lens group along the planar movement vertical with optical axis；Shutter/aperture stop unit, it is fixed on
Lens group holding frame is used in the translation, includes the shutter actuator of shutter and the driving shutter, and aperture and the driving light
The aperture actuator of circle；And the 2nd lens driving portion, it is fixed on the base portion, with independently of the translation lens
Group mode, along optical axis to be disposed in than the translation lens group by image side position at lens group part or all
It is driven, in inner side of the translation with lens group holding frame, the camera lens translation is with actuator, the shutter actuator
It is adapted to surround the translation lens group with the side of lens group in the translation with actuator with the aperture, described the
2 lens driving portions are disposed in following location：In the case of from the direction along optical axis, than the translation lens group
The external diameter of holding frame in the inner part and than the translation lens group external diameter in the outer part not with the camera lens translation actuator,
Shutter actuator and the aperture overlapping position of actuator, shortening state is turned into and described flat in the lens barrel
Lens group holding frame and the base portion are diverted from one use to another in the case of, the 2nd lens driving portion is from the base portion towards object
Side is protruded so that the end of object side is located at the side of the translation lens group.
Brief description of the drawings
Fig. 1 is the stereogram of the camera device with lens barrel.
Fig. 2 is the stereogram of lens barrel.
Fig. 3 is the front view of lens barrel.
Fig. 4 is the longitudinal section along optical axis of the lens barrel of shortening state.
Fig. 5 is the longitudinal section along optical axis of the lens barrel of wide-angle side state.
Fig. 6 is the longitudinal section along optical axis of the lens barrel of telescope end state.
Fig. 7 is the exploded perspective view of lens barrel.
Fig. 8 is the stereogram at the back side for representing lens barrel.
Fig. 9 be using shorten state lens barrel the plane vertical with optical axis O as section sectional view (Fig. 4 IX-
IX sectional views).
Figure 10 is the stereogram for amplifying base portion.
Figure 11 is to deploy the outer peripheral face of cam frame and show the figure of cam contour.
Figure 12 is to deploy the inner peripheral surface of cam frame and show the figure of cam contour.
Figure 13 be represent the rotation angle θ of cam frame with from image planes to the 1st lens group~the 3rd lens group face top apart from L
Between relation curve map.
Figure 14 is the stereogram of the 3rd lens group holding frame.
Figure 15 is the exploded perspective view in camera lens translation mechanism portion.
Figure 16 is the figure from the lens group holding frame of forward observation the 3rd and movable frame.
Figure 17 is Figure 16 XVII-XVII sectional views.
Figure 18 is the sectional view for the front surface part for representing the 2nd lens group holding frame.
Embodiment
Illustrate the preferred embodiment of the present invention referring to the drawings.In addition, in each figure used in the following description,
Each inscape is taken to the size for the degree that can be recognized on accompanying drawing, thus different ratios is used according to each inscape
Chi, the present invention is not limited only to the quantity, the shape of inscape, the size of inscape of these inscapes shown in the drawings
The relative position relationship of ratio and each inscape.
The camera device such as digital camera, digital camera of lens barrel 1 of the present invention, to passing through multiple camera lenses
The photographic optical system of composition is kept.
Fig. 1 is shown as the outward appearance of the digital camera 100 of one of the camera device of the lens barrel 1 with the present invention.
It is in addition, in herein below, the optical axis O of the photographic optical system constituted with multiple camera lenses for being kept by lens barrel 1 etc. is parallel
Axle as Z axis, regard 2 axles perpendicular to one another in the plane perpendicular to Z axis as X-axis and Y-axis.Digital camera 100 is protected
In the case of holding as so-called erectility, Z axis and X-axis are horizontal axle, and Y-axis is vertical axle.X-axis, Y-axis and Z axis are each
Suitably illustrated in figure.In addition, in herein below, on along the direction of Z axis, using object side (object side) before
Side, rear is used as using image side (photographing element side).
Digital camera 100 has lens barrel 1, photographing element 102, release-push 103, flash lamp in camera main-body 101
Unit 104, power switch 105 and zoom operation switch 106.
Strobe light unit 104 is contained in camera main-body 101 when unused, when in use with being set to by digital camera
100 be kept upright state when protrude upward.Strobe light unit 104 is adapted to, and erectility is being in from forward observation
In the case of digital camera 100, positioned at the right side of lens barrel 1.
As illustrated schematically in fig. 2, it can become as the lens barrel 1 of an embodiment of the invention and turn to following 2 kinds
(object side) is sent out and can carried out in photo-optics system forwards for state, i.e. multiple frame parts of holding photographic optical system
The photography possible state of the imaging of the image planes of system, the multiple frame part rearward (main body side of digital camera 100) feeding and
Make the shortening state that the total length of Z-direction is shorter than photography state.
In addition, photographic optical system is can to change the zoom lens of focal length, lens barrel 1 makes multiple frame parts along light
Axle O is moved, so as to change the focal length of photographic optical system.Fig. 4 be lens barrel 1 be in shortening state in the case of cut open
View.Fig. 5 is cuing open in the case that lens barrel 1 is in the focal length of photography state and photographic optical system for most short wide-angle side
View.Fig. 6 is cuing open in the case that lens barrel 1 is in the focal length of photography state and photographic optical system for most long telescope end
View.Concrete condition is described below, and the change of the shortening state of lens barrel 1 and the switching action of photography state and focal length is changed
Make what is mainly carried out by the i.e. zoom drive motor 31a of electro-motor included in zoom driving unit 31 power.
Fig. 7 is the exploded perspective view of lens barrel 1.In addition, Fig. 8 is the stereogram at the back side for representing lens barrel 1.Fig. 9
Be using the plane vertical with optical axis O as section sectional view (Fig. 4 IX-IX sectional views).Figure 10 is exaggerated base portion 2
Stereogram.
The photographic optical system that lens barrel 1 is kept is the 1st lens group 21 with positive refracting power, with negative refractive power
2nd lens group 22, the 3rd lens group 23 with positive refracting power, the 4th lens group 24 with negative refractive power and with positive refracting power
The 5th lens group 25 5 groups of structures.In addition, being equipped between the 2nd lens group 22 and the 3rd lens group 23 with tripper
With the shutter/aperture stop unit 16 of aperture device.The shutter/aperture stop unit 16 of present embodiment has selectively matches somebody with somebody on optical axis O
Put the mechanism of ND filters (neutral density filter).
Lens barrel 1 has keeps the 1st lens group 21, the 2nd lens group 22, the 3rd lens group 23, the 4th lens group 24 respectively
With the 1st lens group holding frame 11 of the 5th lens group 25, the 2nd lens group holding frame 12, the 3rd lens group holding frame 13, the 4th lens
The group lens group holding frame 15 of holding frame 14 and the 5th.Shutter/aperture stop unit 16 is disposed in the 3rd lens group holding frame 13.
Details will be described later, and lens barrel 1, which has, realizes the jitter correction based on so-called camera lens translation mode
The camera lens translation mechanism portion 40 of function, by making the 3rd lens group 23 and the plane perpendicular to optical axis O as translation lens group
It is moved parallel to, makes as being moved on imaging surface.Camera lens translation mechanism portion 40 is disposed in the 3rd lens group holding frame 13.
In addition, lens barrel 1 have keep the base portion 2 of photographing element 102, fixed frame 3 fixed in base portion 2,
It is supported in fixed frame 3 and is driven in rotation and is retreated on the direction along optical axis O in zoom action and during contractive action
The cam frame 4 of driving, the floating key 5 retreated under rotationally constrained state together with cam frame 4 on the direction along optical axis O,
The lead-frame 6 retreated under rotationally constrained state together with cam frame 4 on the direction along optical axis O, cam frame 4 is rotated
Driving as the zoom driving unit 31 in the 1st lens driving portion, on the direction along optical axis O to the 4th lens group holding frame
14 carry out the 4th lens group driver element 34 of advance and retreat drivings, the 5th lens group holding frame 15 are entered on the direction along optical axis O
Advance and move back the 5th lens group driver element 35 as the 2nd lens driving portion of driving.1st lens group holding frame 11, the 2nd lens
The group lens group holding frame 13 of holding frame 12 and the 3rd is rotationally constrained state, passes through being rotated in along optical axis O side for cam frame 4
Retreat upwards.
Illustrate the details of each structure of lens barrel 1 below.
Base portion 2 is the part of substantially planar, and photographing element 101 is kept on optical axis O.That is, the position phase of base portion 2
Image planes for the photographic optical system in photography possible state are fixed.As shown in Figure 10 amplifications, on the preceding surface of base portion 2
Upright to set leading axle 17 and 18, the leading axle 17 and 18 pair of the 4th lens group holding frame 14 and the 5th lens group holding frame 15 are with energy
Them are enough made to retire dynamic mode along optical axis O direction is enterprising and guide.Leading axle 17 and 18 is that section is circular
The part of pole shape, it is fixed in base portion 2 in the central shaft mode parallel with optical axis O.In the He of the 4th lens group holding frame 14
The bearing portion slided respectively along leading axle 17 and 18 is formed in 5th lens group holding frame 15.
In addition, uprightly being set on the preceding surface of base portion 2 to the 4th lens group holding frame 14 and the 5th lens group holding frame 15
The rotation stop axle 19 that rotation around leading axle 17 and 18 is limited.Rotation stop axle 19 is the part that section is circular pole shape, with
The central shaft mode parallel with optical axis O is fixed in base portion 2.In the 4th lens group holding frame 14 and the 5th lens group holding frame 15
It is upper to form the bearing portion slided along rotation stop axle 19.
In addition, being equipped with the 5th lens group driver element 35 as the 2nd lens driving portion in base portion 2.5th lens
Group driver element 35 is configured to have：Possess the stepper motor 35a of the output shaft of rotation, the output shaft one with stepper motor 35a
Play the externally threaded screw 35b of rotation, with the nut 35c with the screw 35b internal thread parts screwed togather.
Screw 35b is protruded forward from the preceding surface of base portion 2, is arranged in the mode that rotary shaft is parallel with optical axis O.Nut
35c rotation is limited, along with screw 35b rotation, along optical axis O direction it is enterprising retire it is dynamic.5th lens group is kept
Frame 15 is exerted a force and abutted with nut 35c by helical spring 35d, along with nut 35c movement on the direction along optical axis O
Retreat and move.
The leading axle 18 and rotation stop axle 19 that are guided to the 5th lens group holding frame 35, the 5th lens group holding frame 35 is entered
5th lens group driver element 35 of row driving is equipped on following location：In the case of from the direction along optical axis O,
External diameter compared to the 3rd lens group holding frame 13 described later is in the position of inner side.
Fixed frame 3 is fixed part on camera main-body 101 and base portion 2, constitute lens barrel 1 it is multiple substantially
Most peripheral is disposed in cylindric frame part.Cam path 3a is equipped in the inner peripheral surface of the fixed frame 3 of substantially cylindrical shape, it is straight
Wire casing 3b and 3c.Cam path 3a is by the tipper 3a1 being upwardly formed relative to the inclined sides of optical axis O and in the upward shape of circumference
Into circumferential groove 3a2 be formed by connecting.The periphery of cam frame 4 described later is embedded in the way of it can slide in cam path 3a
The cam follower 4c set on the 4a of face.In addition, straight-line groove 3b and 3c are the linear grooves parallel with optical axis O.In straight-line groove
The jut that the outer peripheral face of floating key 5 described later is set is trapped in 3b in the way of it can slide.With can in straight-line groove 3c
The mode of slip is trapped in the jut 6a set on the outer peripheral face of lead-frame 6 described later.
The lens group driver element 34 of zoom driving unit 31 and the 4th is equipped in the periphery of fixed frame 3.As shown in figure 3,
In the case of front peephole head lens barrel 1, the lens group driver element 34 of zoom driving unit 31 and the 4th is disposed in across optical axis
Position relative O.In addition, in the case where being in the digital camera 100 of erectility from forward observation, zoom driving unit 31
The bottom-right location relative to optical axis O is disposed in, the 4th lens group driver element 34 is disposed in the top-left position relative to optical axis O.
In digital camera 100, zoom driving unit 31 is protruded from the bottom of lens barrel 1 towards right side, is driven in the zoom
Strobe light unit 104 is arranged in the space of the upside of moving cell 31.
Multiple gears of the zoom driving unit 31 comprising zoom drive motor 31a, spool gear 31b and following explanation.Long tooth
Wheel 31b is the little gear with the rotary shaft parallel with optical axis O, as shown in figure 9, the inner circumferential in fixed frame 3 is exposed.Spool gear
31b is engaged with the gear part 4g set in the periphery of cam frame 4.Zoom drive motor 31a is to produce to revolve spool gear 31b
Turn the servomotor of the power of driving.The transmission tooth that zoom drive motor 31a power is constituted through multiple gears as shown in Figure 2
Mechanism is taken turns to transmit to spool gear 31b.Zoom drive motor 31a and Transmission gear mechanism are incorporated in from the periphery of fixed frame 3
In the gearcase 31h that the mode that face is protruded is set.Transmission gear mechanism passes through worm screw 31c, worm gear 31d, 1Z gears
31e, 2Z gears 31f and idle gear 31g are constituted.
Zoom drive motor 31a gearcase 31h rear side be set to rotary shaft be roughly parallel to it is vertical with optical axis O
Plane (X/Y plane).Worm screw 31c is fixed with zoom drive motor 31a rotary shaft.Engaged with worm screw 31c
Worm gear 31d is parallel with optical axis O with rotary shaft is set to.As above, by so-called worm drive mechanism, zoom drive motor 31a's
The rotary shaft of output about bends 90 degree.
In gearcase 31h, 1Z gears 31e, 2Z gears 31f and idle gear 31g are parallel with optical axis O with rotary shaft
Mode is equipped on zoom drive motor 31a front side.1Z gears 31e is engaged with worm gear 31d, idle gear 31g and long tooth
Take turns 31b engagements.Worm gear 31d rotation is transmitted via 1Z gears 31e, 2Z gears 31f and idle gear 31g to spool gear 31b.
In the present embodiment, use in the gearcase of zoom driving unit 31 with overlapping side on optical axis O directions
Formula configures zoom drive motor 31a and 1Z gears 31e, 2Z gears 31f and idle gear 31g so-called 2 Rotating fields, so that
Inhibit the height of gearcase 31h in the Y direction.I.e., in the present embodiment, the numeral of erectility is being in from forward observation
In the case of camera 100, height of the gearcase 31h in above-below direction can be reduced.Thereby, it is possible to increase in the vertical direction
Gearcase 31h top arranges the space of strobe light unit 104 (shown in Fig. 3).
4th lens group driver element 34 is configured to have：The stepper motor 34a of output shaft with rotation；With stepping electricity
The externally threaded screw (not shown) that machine 35a output shaft is rotated together；And with the internal thread part screwed togather with screw not
The nut of diagram.
4th lens group driver element 34 is similarly configured to the 5th above-mentioned lens group driver element 35, passes through stepping electricity
Machine 34a carries out rotation driving to screw, and drive nut is retreated on the direction along optical axis O.4th lens group holding frame 34 is with being somebody's turn to do
Nut together along optical axis O direction it is enterprising retire it is dynamic.
Cam frame 4 is substantially cylindric part, and the inner circumferential of fixed frame 3 is embedded in state that is free to rotate and retreating
Portion.
It is formed with the outer peripheral face 4a of cam frame 4 rear portion：Fixed frame 3 is embedded in freely slidable mode respectively
Multiple cam follower 4c in multiple cam path 3a, and the spool gear 31b meshed gears portion with zoom driving unit 31
4g。
As described above, the cam follower 4c of cam frame 4 is embedded in the cam path of fixed frame 3 in freely slidable mode
3a, gear part 4g is engaged with spool gear 31b.Therefore, by the power of zoom driving unit 31, rotate cam frame 4.Cam frame
During 4 rotation, the cam path 3a of the cam follower 4c of the cam frame 4 along fixed frame 3 is moved.
Lens barrel 1 be shortening state in the case of, if cam frame 4 to from forward observation when counter clockwise direction revolve
Turn, then in the range of cam follower 4c is absorbed in tipper 3a1, cam frame 4 advances in rotation.In addition, in cam driven
Part 4c is absorbed in the range of circumferential groove 3a2, and cam frame 4 is not retreated on the direction along optical axis O and moves and rotated.
Here, lens barrel 1 from the shortening state shown in Fig. 4 to be changed into as photography possible state Fig. 5 shown in
The state of wide-angle side nearby untill in a period of, cam follower 4c is absorbed in tipper 3a1.Lens barrel 1 may shape for photography
In the case of state, i.e., between the state of the telescope end shown in state and Fig. 6 of the lens barrel 1 in the wide-angle side shown in Fig. 5
In the case of, cam follower 4c is absorbed in circumferential groove 3a2.That is, in the case that lens barrel 1 is photography possible state, cam frame 4 is not
Retreat, and only driven by zoom driving unit 31 in direction of rotation on the direction along optical axis O.
In addition, as is illustrated by figs. 11 and 12, multiple cams are set in outer peripheral face 4a and inner peripheral surface the 4b engraving of cam frame 4
Groove.Figure 11 is that, by the partially unfolded expanded view for plane of the outer peripheral face 4a of cam frame 4 barrel surface, Figure 12 is will to be used as cam
The inner peripheral surface 4b of the barrel surface of frame 4 expands into the expanded view of plane.
The outer peripheral face 4a engravings of cam frame 4 are provided with 3 article of the 1st main cam groove 4d and tool with identical cam contour
There is this totally 6 articles of cam path of 3 article of the 1st auxiliary cam groove 4e of identical cam contour.1st main cam groove 4d and the 1st auxiliary cam groove 4e
It is arranged alternately in the circumferential.
Cam frame 4 is absorbed in the inner side of the 1st lens group holding frame 11.Set in the inner peripheral surface protrusion of the 1st lens group holding frame 11
It is secondary that the main cam driven member 11a and auxiliary cam driven member 11b put is absorbed in the 1st main cam groove 4d and the 1st in the way of it can slide
Cam path 4e.
In addition, engraving is provided with 3 article of the 2nd cam path with identical cam contour on the inner peripheral surface 4b of cam frame 4
4f.In the cam follower 12a of the outer peripheral face protrusion setting of the 2nd lens group holding frame 12 and in the 3rd lens group holding frame 13
The cam follower 13a that outer peripheral face protrusion is set is absorbed in the 2nd cam path 4f in the way of it can slide.
On the multiple cam paths formed on cam frame 4 and the details for the cam follower for being absorbed in the cam path,
It will be described later.
Floating key 5 is formed as drum, is embedded in the inner peripheral portion of cam frame 4 in the way of it relative can rotate freely.Fig. 7
Represent the state that floating key 5 is sunk into cam frame 4.
Portion is conformed with the peripheral part of the rear end of floating key 5, the jut is embedded in fixation in the way of it can slide
The straight-line groove 3b of frame 3.The jut is embedded in the straight-line groove 3b of fixed frame 3 in the way of it can slide, so that it is relative to limit floating key 5
In fixed frame 3 around optical axis O rotation.
In addition, floating key 5 relative to cam frame 4 can carry out rotating against and not relative to cam frame around optical axis O
The mode that 4 relatively retreat on the direction along optical axis O moves engages with cam frame 4.
In being absorbed in the cylindrical portion in cam frame 4 for floating key 5, it is formed with using the direction parallel with optical axis O and is used as long side side
To 3 straight lines stitch 5b and 3 straight line seam 5c.Straight line stitches interior periphery insertions of the 5b and 5c in floating key 5.Straight line stitches 5b and 5c in week
To alternately arranging.
2nd lens group holding frame 12 and the 3rd lens group holding frame 13 are absorbed in the inner side of floating key 5.In the inner side of floating key 5, the 2nd
Lens group holding frame 12 is located at the front of the 3rd lens group holding frame 13.
The 2nd lens group holding frame 12 outer peripheral face protrusion set cam follower 12a in the way of it can slide
Insertion in straight line seam 5b.Thus, rotation of the 2nd lens group holding frame 12 relative to fixed frame 3 around optical axis O is limited, but energy
It is enough to be retreated on the direction parallel with optical axis O.In addition, the 3rd lens group holding frame 13 outer peripheral face protrusion set cam from
Moving part 13a insertions in straight line seam 5c in the way of it can slide.Thus, the 3rd lens group holding frame 13 relative to fixed frame 3 around
Optical axis O rotation is limited, but can be retreated on the direction parallel with optical axis O.
As described above, cam follower 12a that the 2nd lens group holding frame 12 and the 3rd lens group holding frame 13 have and convex
Wheel driven member 13a is trapped in the way of it can slide in the 2nd cam path 4f of the inner peripheral surface 4b of cam frame 4 formation.Therefore, exist
Cam frame 4 is around in the case that optical axis O rotates, and the 2nd lens group holding frame 12 and the 3rd lens group holding frame 13 are along the 2nd cam path
4f shape, parallel with optical axis O direction it is enterprising retire it is dynamic.
Lead-frame 6 is substantially cylindric part, be disposed in the 1st lens group holding frame 11 outside and fixed frame 3 it is interior
Side.The projection for the straight-line groove 3c that fixed frame 3 is embedded in the way of it can slide is provided with the peripheral part of the rear end of lead-frame 6
Portion 6a.Jut 6a is embedded in the straight-line groove 3c of fixed frame 3 in the way of it can slide, thus limit lead-frame 6 relative to
Rotation of the fixed frame 3 around optical axis O.
In addition, lead-frame 6 relative to cam frame 4 can carry out rotating against and not relative to cam around optical axis O
The mode that the relative advance and retreat that frame 4 carry out on the direction along optical axis O are moved engages with cam frame 4.
The inner peripheral surface of lead-frame 6 is formed with the linear groove parallel with optical axis O i.e. straight-line groove 6b.Protected in the 1st lens group
The jut 11c for holding the outer peripheral face setting of frame 11 is absorbed in the way of it can slide in straight-line groove 6b.Thus, the 1st lens group is protected
Hold rotation of the frame 11 relative to fixed frame 3 around optical axis O to be limited, but can be retreated on the direction parallel with optical axis O.
As described above, main cam driven member 11a and auxiliary cam driven member 11b that the 1st lens group holding frame 11 has are with energy
The mode enough slided is trapped in the 1st main cam groove 4d and the 1st auxiliary cam groove 4e of the outer peripheral face 4a of cam frame 4 formation.Therefore,
In the case where cam frame 4 is around optical axis O rotations, the 1st lens group holding frame 11 is along the 1st main cam groove 4d and the 1st auxiliary cam groove
4e shape, parallel with optical axis O direction it is enterprising retire it is dynamic.
Then, the details of multiple cam paths formed on cam frame 4 is illustrated.
As shown in figure 11,3 article of the 1st main cam groove 4d and 3 has circumferentially been alternatively formed on the outer peripheral face 4a of cam frame 4
Article the 1st auxiliary cam groove 4e.1st main cam groove 4d and the 1st auxiliary cam groove 4e is identical cam contour, and the 1st auxiliary cam groove 4e matches somebody with somebody
Located at the 1st main cam groove 4d front.In the present embodiment, by as above making the 1st main cam groove 4d and the 1st auxiliary cam groove 4e
Stagger in the longitudinal direction, so as to form 6 cam paths with identical cam contour.
The main cam driven member 11a and auxiliary cam driven member 11b of 1st lens group holding frame 11 are fallen into the way of it can slide
Enter the 1st main cam groove 4d and the 1st auxiliary cam groove 4e.In fig. 11, represent that lens barrel 1 is shortening state by symbol 11a (R)
In the case of main cam driven member 11a position, pass through symbol 11a (W) represent lens barrel 1 be wide-angle side state situation
Under main cam driven member 11a position, by symbol 11a (T) represent lens barrel 1 be telescope end state in the case of master
Cam follower 11a position.In addition, in fig. 11, the situation that lens barrel 1 is shortening state is represented by symbol 11b (R)
Under auxiliary cam driven member 11b position, by symbol 11b (W) represent lens barrel 1 be wide-angle side state in the case of pair
Cam follower 11b position, by symbol 11b (T) represent lens barrel 1 be telescope end state in the case of auxiliary cam from
Moving part 11b position.
Here, the chimeric between the 1st auxiliary cam groove 4e and auxiliary cam driven member 11b is set to than the 1st main cam groove 4d
With the chimeric mitigation between main cam driven member 11a.Specifically, the 1st main cam groove 4d and main cam driven member 11a is protected all the time
The state of contact is held, and there is gap between the 1st auxiliary cam groove 4e and auxiliary cam driven member 11b.
That is, the 1st lens group holding frame 11 is by 3 with being rotated in along the movement on optical axis O direction for cam frame 4
Engaging between 1st main cam groove 4d and main cam driven member 11a is carried out.In the present embodiment, due to falling
In the case of applying external force to the 1st lens group holding frame 11, except between 3 couple of the 1st main cam groove 4d and main cam driven member 11a
Engaging outside, because 3 couple of the 1st auxiliary cam groove 4e and auxiliary cam driven member 11b holding section is also the structure of bearing the external force,
Thus it is not susceptible to coming off for the 1st lens group holding frame 11.
On the other hand, as shown in figure 12, it is formed with 3 article of the 2nd cam path 4f in the inner peripheral surface 4b of cam frame 4.2nd lens group
The cam follower 12a of holding frame 12 and the cam follower 13a of the 3rd lens group holding frame 13 are absorbed in the way of it can slide
2nd cam path 4f.
In fig. 12, represent that lens barrel 1 is the cam follower 12a in the case of shortening state by symbol 12a (R)
Position, by symbol 12a (W) represent lens barrel 1 be wide-angle side state in the case of cam follower 12a position,
Position of the lens barrel 1 for the cam follower 12a in the case of telescope end state is represented by symbol 12a (T).In addition,
In Figure 12, position of the lens barrel 1 for the cam follower 13a in the case of shortening state is represented by symbol 13a (R), led to
Cross symbol 13a (W) and represent position of the lens barrel 1 for the cam follower 13a in the case of wide-angle side state, pass through symbol
13a (T) represents position of the lens barrel 1 for the cam follower 13a in the case of telescope end state.
Figure 13 shows the rotation angle θ of the cam frame 4 of the lens barrel 1 of present embodiment and from image planes to the 1st~the 3rd lens
The relation between L on the face top of group.In the curve map shown in Figure 13, transverse axis is from wide-angle side state to telescope end state
Cam frame 4 rotation angle θ.θ Wide (wide-angle) are the angle of the cam frame 4 when lens barrel 1 is wide-angle side state, θ Tele
(looking in the distance) is the angle of the cam frame 4 when lens barrel 1 is telescope end state.
In addition, in the curve map shown in Figure 13, the longitudinal axis is apart from L from image planes to the face of each lens group top.Solid line institute
The curve G1 shown represents the distance pushed up from image planes to the face of the 1st lens group 21, and the curve G2 shown in dotted line is represented from image planes to the 2nd
The distance on the face top of lens group 22, the curve G3 shown in single dotted broken line represents the distance pushed up from image planes to the face of the 3rd lens group 23.
As shown in figure 13, in the lens barrel 1 of present embodiment, zoom action is being carried out from wide-angle side to telescope end
When, the 1st lens group 21 moves backward object side to image side and moved, and the 2nd lens group 22 is moved to image side, and the 3rd lens group 23 is to thing
Move on side.Brightness aperture is moved together with the 3rd lens group 23.
In addition, although do not illustrated, in the lens barrel 1 of present embodiment, enter from wide-angle side to telescope end
During row zoom action, the 4th lens group 24 is moved to object side, and the 5th lens group G5 is moved to image side.
Then, the detailed construction of the 3rd lens group holding frame 13 is illustrated.As described above, the 3rd lens group holding frame 13 is except protecting
Hold outside the 3rd lens group 23, also keep shutter/aperture stop unit 16 and camera lens translation mechanism portion 40.Figure 14 is that the 3rd lens group is kept
The stereogram of frame 13.Figure 15 is the exploded perspective view in camera lens translation mechanism portion 40.Figure 16 is kept from the lens group of forward observation the 3rd
The figure of frame 13 and movable frame 41.Figure 17 is Figure 16 XVII-XVII sectional views.
Camera lens translation mechanism portion 40 is configured to make the 3rd lens group 23 along the planar movement vertical with optical axis O.In this implementation
In the photographic optical system of mode, the 3rd lens group 23 is along the planar movement vertical with optical axis O, so that the imaging in image planes
Move position.
As shown in figure 15, camera lens translation mechanism portion 40 is configured to that there is the movable frame 41 for fixing the 3rd lens group 23, generation to make
The camera lens translation actuator 50 of power of the movable frame 41 along the planar movement vertical with optical axis O.
Movable frame 41 has the cylindrical portion 41a for the substantially cylindrical shape for internally fixing the 3rd lens group 23, from cylindrical portion
The flange part 41b that 41a outer peripheral face extends towards radial outside.Movable frame 41, which is matched somebody with somebody, to be set to keep relative to the 3rd camera lens group
Frame 13 is relatively moved along the plane vertical with optical axis O.
Specifically, as shown in Figure 15 and Figure 16, movable frame 41 is kept at the flange part 41b back side and in the 3rd camera lens group
3 balls 44 have been sandwiched between the support sector 13b for the tabular substantially vertical with optical axis O that the inner side of frame 13 is protruded preceding surface.3
3 positions near individual ball 44, flange part is erected at towards support sector 13b to the helical spring 45 that flange part 41b exerts a force
On 41b and support sector 13b.Movable frame 41 by the rotation of the ball 44, can relative to the 3rd camera lens group's holding frame 13 along with light
Plane relative movement vertical axle O.
In addition, being formed with the insertion of optical axis O institutes insertion on the support sector 13b being arranged in the 3rd lens group holding frame 13
Hole 13c.In addition, be formed with support sector 13b direction that be substantially parallel with optical axis O through hole 13d, 13e of insertion and
13f。
Through hole 13d formation is in following location：In the case of from the direction along optical axis O, driven with the 5th lens group
The stepper motor 35a and screw 35b of moving cell 35 are overlapping.Lens barrel 1 be shortening state in the case of, from base portion 2 to
The screw 35b that front is protruded runs through in through hole 13d.
In addition, through hole 13e and 13f formation are in following location：In the case of from the direction along optical axis O, point
It is not overlapping with leading axle 18 and rotation stop axle 19.In the case where lens barrel 1 is shortening state, protruded forwards from base portion 2
Leading axle 18 and rotation stop axle 19 run through in through hole 13e and 13f.
Camera lens translation actuator 50 has produces drive by making coil midstream overcurrent in the magnetic field of permanent magnet
The structure of the so-called voice coil motor of power.The principle of voice coil motor is known, thus is omitted the description.
Camera lens translation is included with actuator 50 to be used to produce the permanent magnet 51x and line along the driving force in the direction of X-axis
Enclose 52x, for producing permanent magnet 51y and coil 52y along the driving force in the direction of Y-axis.
Permanent magnet 51x and 51y are fixed on the flange part 41b of movable frame 41.In addition, coil 52x and coil 52y quilts
It is fixed on the rear side of shutter/aperture stop unit 16.
Camera lens translation is constituted with the permanent magnet 51x and 51y and coil 52x and coil 52y of actuator 50 in the 3rd lens
Side, the i.e. radial outside of the 3rd lens group 23 of the 3rd lens group 23 are disposed in group holding frame 13.In other words, camera lens is constituted to put down
Divert from one use to another actuator 50 permanent magnet 51x and 51y and coil 52x and coil 52y be disposed on the direction along optical axis O with
The overlapping position of 3rd lens group 23.
Here, as shown in figure 9, in the case of the lens barrel 1 from the direction along optical axis O, camera lens translation is caused
Dynamic device 50 is disposed in position not overlapping with rotation stop axle 19 with the 5th lens group driver element 35, the leading axle 18 set in base portion 2
Put.
More specifically, in the case where being in the digital camera 100 of erectility from forward observation, camera lens translation is caused
Dynamic device 50 is disposed in the left side of the 3rd lens group 23 and the region of downside.The digital camera of erectility is being in from forward observation
In the case of 100, permanent magnet 51x and coil 52x are disposed in the left of the 3rd lens group 23, permanent magnet 51y and coil 52y
It is disposed in the lower section of the 3rd lens group 23.
And, although diagram is not made, but camera lens translation actuator 50 has the path for being used for controlling the magnetic line of force
The yoke being made up of magnetic, for detecting movable frame 41 relative to Hall element of relative position of the 3rd lens group 23 etc..
Shutter/aperture stop unit 16 is fixed on the front of the 3rd lens group holding frame 13, and with being set to above-mentioned coil 52x
Protruded towards the rear from shutter/aperture stop unit 16 with coil 52y.
In addition, shutter/aperture stop unit 16 has the shutter actuator 16a of driving shutter, drives the aperture of aperture to cause
Dynamic device 16b and driving ND filters ND filters actuator 16c.These shutters actuator 16a, aperture with actuator 16b and
ND filters are protruded with actuator 16c towards the rear of shutter/aperture stop unit 16, as shown in Fig. 9 sectional view, positioned at the 3rd lens group
23 side.In other words, shutter is located at actuator 16a, aperture with actuator 16b and ND filter with actuator 16c rear end
Than the front end position rearward of the 3rd lens group 23, it is disposed on the direction along optical axis O overlapping with the 3rd lens group 23
Position.
Here, as shown in figure 9, in the case of the lens barrel 1 from the direction along optical axis O, shutter actuator
16a, aperture be disposed in actuator 16b and ND filter with actuator 16c not with camera lens translation actuator 50, the 5th lens group
Driver element 35, leading axle 18 position overlapping with rotation stop axle 19.
In the lens barrel 1 of present embodiment, as shortening state so as to which the 3rd lens group holding frame 13 is closest to base
In the case of portions 2, the 5th lens group driver element 35, leading axle 18 and the rotation stop axle 19 protruded forwards from base portion 23 is each
From front side end be located at the 3rd lens group 23 side.
As described above, the camera lens of the part as the side that the 3rd lens group 23 is disposed in the 3rd lens group holding frame 13
Translation is provided in from edge with actuator 50, shutter with actuator 16a, aperture with actuator 16b and ND filter with actuator 16c
Position not overlapping with rotation stop axle 19 with the 5th lens group driver element 35, leading axle 18 in the case of optical axis O direction observation
Put, thus they will not interfere with.
In addition, being caused to camera lens translation actuator 50, shutter actuator 16a, aperture with actuator 16b and ND filter
The input and output of dynamic device 16c power supply and control signal are entered through the 2nd flexible printed wiring board 61 as shown in Figure 14
Capable.2nd flexible printed wiring board 61 is as shown in figure 8, pulled to the outer peripheral face of fixed frame 3.2nd flexible print wiring base
Being pulled to the position of the outer peripheral face of fixed frame 3 for plate 61 is arranged in the way of the outer peripheral face along fixed frame 3, via planar
Connector 62, with being mounted with that the 1st flexible printed wiring board 60 of photographing element 102 is electrically connected.1st flexible printed wiring board
60 are connected in connecting portion 60a with the control base board (not shown) of digital camera 100.
As described above, conduct of the lens barrel 1 of present embodiment in the shake correction mechanism of camera lens parallel-moving type is movable
Around 3rd lens group 23 of camera lens, in addition to configuration camera lens translation is with actuator 50, shutter actuator is also configured with
16a, aperture actuator 16b and ND filter actuator 16c.
In addition, in the lens barrel 1 of present embodiment, in the case of from the direction along optical axis O, will be used for
Leading axle 18, the lens group driver element 35 of rotation stop axle 19 and the 5th that 5th lens group 25 carries out advance and retreat driving are disposed in than the 3rd
The external diameter of lens group holding frame 13 is in the inner part and than the external diameter position in the outer part of the 3rd lens group 23.
Leading axle 18, the lens group driver element of rotation stop axle 19 and the 5th for carrying out advance and retreat driving to the 5th lens group 25
35 protrude forward from base portion 2, still, and they are in the case where lens barrel 1 is shortening state, as shown in figure 9, being configured at
Not with the camera lens translation that is arranged around the 3rd lens group 23 with actuator 50, shutter with actuator 16a, aperture actuator
The position that 16b and ND filters are disturbed with actuator 16c.
The lens barrel 1 of present embodiment with this structure will be used to retreat to the 5th group of camera lens holding frames 15
The external diameter that leading axle 18, the lens group driver element 35 of rotation stop axle 19 and the 5th of driving are disposed in than the 3rd lens group holding frame 13 is leaned on
The position of inner side, so as to reduce overall external diameter, also, it is also the with camera lens translation actuator 50 the 3rd saturating by making
Microscope group holding frame 13, close to base portion 2, thus enables that total length during shortening state shortens when shortening state.
On the other hand, in the photographic optical system of present embodiment, the external diameter of the 1st lens group 21 compares the 2nd lens group 22
External diameter for it is larger.Therefore, in the case where lens barrel 1 is in shortening state, as shown in figure 18, it can pass through from front
The front surface part 12d of the lens group holding frame 12 of 1st lens group, 21 visual confirmation the 2nd part.
Then, in the lens barrel 1 of present embodiment, the 2nd lens group holding frame 12 it is front surface part 12d,
Lens barrel 1 when being shortening state can in the region by the visual confirmation of the 1st lens group 21, mark represent model, ProductName,
The character string of at least one among brand name, producer's name and camera lens specification.In addition, the mark of character string is, for example, by print
What brush was carried out.
So, if marked in the front surface part 12d for being disposed in the 2nd lens group holding frame 12 of the inner side of lens barrel 1
Character string, then can prevent due to the situation that abrasion etc. causes mark desalination to disappear.
In addition, the invention is not restricted to above-mentioned embodiment, without prejudice to being read in full from claims and specification
It can suitably be changed in the range of inventive concept or thought, the skill of the present invention should be also belonged to the lens barrel of this change
Art scope.
The lens barrel of the present invention is not limited to the mode set in so-called digital camera, naturally it is also possible to be disposed on
Mobile communication terminal, game machine, digital media player etc. possess the mode of the electronic equipment of camera function.
Claims (5)
1. a kind of lens barrel, it keeps the photographic optical system being made up of multiple lens groups, can shortened in non-photographic
Total length, the lens barrel has：
Base portion, its position is fixed relative to the image planes of the photographic optical system；
Translation lens group, it is included in the lens group in the photographic optical system, by being put down along vertical with optical axis
Face movement is carried out as the correction of shake；
Lens group holding frame is used in translation, and it is disposed in the object side of the base portion, is keeping the same of the translation lens group
When moved relative to the base portion along optical axis；
1st lens driving portion, it drives the translation lens group holding frame along optical axis；
Camera lens translation actuator, it is fixed on the translation lens group holding frame, make the translation lens group along with
The vertical planar movement of optical axis；
Shutter/aperture stop unit, it is fixed on the translation lens group holding frame, includes the shutter use of shutter and the driving shutter
Actuator, and aperture and the aperture actuator for driving the aperture；And
2nd lens driving portion, it is fixed on the base portion, in the way of independently of the translation lens group, along optical axis pair
Part or all being disposed in than the translation with lens group by the lens group at the position of image side is driven,
Characterized in that,
The translation be with lens group holding frame it is cylindric,
In inner side of the translation with lens group holding frame, the camera lens translation actuator, the shutter actuator and institute
Aperture is stated to be adapted to surround the translation lens group with the side of lens group in the translation with actuator,
The 2nd lens driving portion is disposed in following location：In the case of from the direction along optical axis, more flat than described
The external diameter of lens group holding frame is diverted from one use to another in the inner part and than external diameter in the outer part flat not with the camera lens of the translation lens group
Actuator, the shutter actuator position overlapping with the aperture actuator are diverted from one use to another, turns into the lens barrel and shortens
State and the translation are with lens group holding frame and the base portion in the case of, and the 2nd lens driving portion is from described
Base portion is protruded towards object side so that the end of object side is located at the side of the translation lens group.
2. lens barrel according to claim 1, it is characterised in that
The photographic optical system is 5 groups of structures, comprising the 1st lens group with positive refracting power, the with negative refractive power the 2nd saturating
Microscope group, the 3rd lens group, the 4th lens group with negative refractive power and the 5th lens with positive refracting power with positive refracting power
Group,
The translation is the 3rd lens group with lens group,
The 2nd lens driving portion is used to drive the 5th lens group.
3. lens barrel according to claim 2, it is characterised in that
Keep the 4th lens group holding frame of the 4th lens group and keep the 5th lens group holding frame quilt of the 5th lens group
With being set to slide along the same leading axle extended parallel to optical axis.
4. lens barrel according to claim 1, it is characterised in that
The lens barrel has ND filters and drives the ND filter actuators of the ND filters,
In inner side of the translation with lens group holding frame, the ND filters are provided in actuator from the direction along optical axis
The not position overlapping with the 2nd lens driving portion in the case of observation.
5. lens barrel according to claim 1, it is characterised in that
The 1st lens driving portion has：In the case of from the direction along optical axis from the outer rim of base portion laterally
Prominent gearcase, and the electro-motor housed in the gearcase,
In the gearcase, the electro-motor is adapted to so that output shaft along the plane vertical with optical axis, and
In the case of from the direction along optical axis, multiple gears the electro-motor nearby stress fold.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-184258 | 2013-09-05 | ||
| JP2013184258A JP2015052649A (en) | 2013-09-05 | 2013-09-05 | Lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104423011A CN104423011A (en) | 2015-03-18 |
| CN104423011B true CN104423011B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410429178.8A Expired - Fee Related CN104423011B (en) | 2013-09-05 | 2014-08-28 | Lens barrel |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2015052649A (en) |
| CN (1) | CN104423011B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6750844B2 (en) * | 2016-02-19 | 2020-09-02 | キヤノン株式会社 | Lens barrel and imaging device |
| JP6842601B2 (en) * | 2018-06-29 | 2021-03-17 | 富士フイルム株式会社 | Lens barrel |
| CN117666253B (en) * | 2024-01-31 | 2024-04-19 | 四川飞拓智控科技有限公司 | Camera capable of quickly replacing optical filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017309A (en) * | 2006-02-08 | 2007-08-15 | 松下电器产业株式会社 | Image blur correction device and camera |
| CN103123432A (en) * | 2011-11-17 | 2013-05-29 | 奥林巴斯映像株式会社 | Shooting device |
| CN103207438A (en) * | 2012-01-13 | 2013-07-17 | 株式会社腾龙 | Zoom lens barrel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5530872B2 (en) * | 2010-09-10 | 2014-06-25 | 株式会社タムロン | Zoom lens |
| US8699151B2 (en) * | 2011-05-17 | 2014-04-15 | Tamron Co., Ltd. | Imaging lens |
-
2013
- 2013-09-05 JP JP2013184258A patent/JP2015052649A/en active Pending
-
2014
- 2014-08-28 CN CN201410429178.8A patent/CN104423011B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017309A (en) * | 2006-02-08 | 2007-08-15 | 松下电器产业株式会社 | Image blur correction device and camera |
| CN103123432A (en) * | 2011-11-17 | 2013-05-29 | 奥林巴斯映像株式会社 | Shooting device |
| CN103207438A (en) * | 2012-01-13 | 2013-07-17 | 株式会社腾龙 | Zoom lens barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015052649A (en) | 2015-03-19 |
| CN104423011A (en) | 2015-03-18 |
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