CN107817570A - Lens barrel - Google Patents
Lens barrel Download PDFInfo
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- CN107817570A CN107817570A CN201710812931.5A CN201710812931A CN107817570A CN 107817570 A CN107817570 A CN 107817570A CN 201710812931 A CN201710812931 A CN 201710812931A CN 107817570 A CN107817570 A CN 107817570A
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- shooting
- snap
- latch piece
- pin
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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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The present invention provides a kind of both realize and minimizes and ensure that impact resistance and can enough accurately ensures the lens barrel of the displacement of lens.In non-shooting, pin (160) is substituted to contact with cam path (132), and sell the situation that (180) contact with cam path (134), and make it that pin (150) does not contact with cam path (131), and sell (170) not contact with cam path (133), thus in the case where making digital camera (1) drop by mistake, pin (160) and cam path (132) and pin (180) that impact is contacted with each other first absorb with cam path (134).Thus, it is suppressed that pin (150) contacts or sold with the collision of cam path (131) (170) and contacted with the collision of cam path (133), can also ensure that high-precision zoom lens driving after the drops.
Description
Technical field
The present invention relates to the lens barrel for the optical axis direction displacement that can realize lens.
Background technology
In the lens barrel installed in digital camera of zoom shot etc. is capable of, make to be arranged at the shifting for keeping zoom lens
The cam follower of dynamic frame engages with being formed at the cam path of cam canister, and movable frame is relatively rotated with cam canister, thus high
Carry out to precision the optical axis direction displacement of zoom lens.
However, such as drop to it sometimes when user inadvertently touches the digital camera for the end for being placed on desk
Floor etc..Now, the stronger load caused by meeting because of inertia by movable frame when being hit when falling etc., in the load
Effect is lower to cause cam follower to be extruded and be plastically deformed by the side of cam path, so exist and cause more than permissible value
Saturating distance between mirrors variation and lens bias etc. worry.Especially because the high magnification of zoom ratio, capturing element
The requirement of maximization, in recent years, lens barrel be present and maximize in itself, the weight of lens barrel, movable frame in itself is also increased
Trend, therefore the trend for the influence increase hit when dropping be present.
On the other hand, Patent Document 1 discloses one kind can by make cam path and three metal cam followers with
And the cam follower of three resin-mades engages to carry out dispersing impact forces and supported respectively, the lens for thus improving impact resistance
Lens barrel.
Patent document 1：Japanese Unexamined Patent Publication 2009-258295 publications.
However, it is contemplated that cost, lightness etc., in cam canister of the side face formed with cam path typically by ester moulding.Special
In the lens barrel of sharp document 1, the frame part as cam canister is also resin-made, is integrally formed with the pin of resin-made.Here,
In the case where cam canister is resin-made, even if the shape for designing multiple cam paths is identical, but the cam path actually shaped
Shape include foozle, cause possibility different from each other very high.If make 6 cam followers simultaneously with it is variform
Cam path engages, then when moving the relative rotation of frame and cam canister, multiple cam followers can produce via cam path
Competition, the worry for hindering smoothly zoom movement be present.
On the other hand, not specific in patent document 1 record, but also can three resin-mades cam follower with it is convex
Gap is set between race.If being formed as such structure, shape of three metal cam followers etc. can be independent
Adjustment, even if thus the shape difference of cam path them can also engaged with not competing, thus, it is possible to ensure smoothly zoom
It is mobile.On the other hand, by making the cam follower of three resin-mades not contacted generally with cam path, zoom will not be hindered to move
It is dynamic, and can thus enable that impact resistance improves by making to be in contact with each other to bear load when applying impact.
It is but clear to produce certain undesirable condition when making digital camera with such lens barrel etc. drop.
Above-mentioned undesirable condition is specifically illustrated.In the lens barrel with said structure, pass through two ranks as follows
Section absorbs impact, i.e., due to dropping when impact, cause the most junior three metal cam follower to be born from cam path
Reaction force F1, and after each portion generation elastic deformation, the cam follower of three resin-mades abuts with cam path, bears anti-
Directed force F 2.As long as its total reaction force (F1+F2) in allowed band, influence is just smaller, but is dropped from higher position
In the case of excessive etc. impact, exist and first bear deforming more than for the installation portion of metal cam follower of impact etc.
Hookean region and the worry for reaching plastic region.If installation portion of metal cam follower etc. is plastically deformed, convex
The abutted position of wheel driven member and cam path changes, and the variation for causing the saturating distance between mirrors more than permissible value, lens be present
Bias etc. worry.On the other hand, if being intended to improve the rigidity such as installation portion of cam follower to overcome above-mentioned impact,
Then cause the further maximization of lens barrel, not preferably.Such undesirable condition is withdrawn camera machine in lens barrel
State in body makes digital camera etc. be particularly susceptible generation problem in the case of dropping by mistake.
The content of the invention
It is an object of the invention to solve above-mentioned problem, its object is to provide a kind of both realized to minimize and ensure crashworthiness
Hitting property and can enough accurately ensures the lens barrel of the displacement of lens.
Lens are remained and in the lens barrel, can had along optical axis direction displacement by the lens barrel of the present invention：
Cartridge unit, it possesses main slot and secondary slot in side face；And frame part, it possesses the main card engaged with above-mentioned main slot
Piece and the secondary snap-latch piece being configured in above-mentioned secondary slot are closed, at least one party's holding of above-mentioned cartridge unit and above-mentioned frame part
Lens are stated, when making above-mentioned cartridge unit be relatively rotated with above-mentioned frame part, above-mentioned main snap-latch piece is relative along above-mentioned main slot
It is mobile, and above-mentioned secondary snap-latch piece relatively moves along above-mentioned secondary slot, in shooting, above-mentioned main snap-latch piece and above-mentioned main card
Groove contact is closed, so as to carry out the positioning of the optical axis direction of said lens, in non-shooting, above-mentioned secondary snap-latch piece closes with above-mentioned vice card
Groove contacts.
Minimize in accordance with the invention it is possible to provide a kind of both realize and ensure that impact resistance and can enough accurately ensures
The lens barrel of the displacement of mirror.
Brief description of the drawings
Fig. 1 (a), Fig. 1 (b) are the numbers of an example of the filming apparatus as the lens barrel for possessing present embodiment
The outside drawing of camera.
Fig. 2 is mounted to the stereogram of the lens barrel 100 of the present embodiment of digital camera 1.
Fig. 3 is the front view of the lens barrel 100 from optical axis direction object side.
Fig. 4 is the lens barrel 100 in IV-IV lines cut away view 3 and the figure observed to the direction of arrow.
Fig. 5 is the 3rd holding frame 115 and the stereogram of tripper 119.
Fig. 6 is the stereogram removed straight cylinder 120 and rotating cylinder 130 from lens barrel 100 and shown.
Fig. 7 is the front view of Fig. 6 structure from optical axis direction object side.
Fig. 8 is the side view of Fig. 6 structure from optical axis orthogonal direction.
Fig. 9 is the structure in IX-IX lines cut away view 7 and the sectional view observed to the direction of arrow.
Figure 10 is the structure in X-X lines cut away view 8 and the sectional view observed to the direction of arrow.
Figure 11 is the figure at the position shown in the arrow XI in the structure of enlarged drawing 10, is the state of shooting area.
Figure 12 is the figure at the position shown in the arrow XII in the structure of enlarged drawing 10, is the state of shooting area.
Figure 13 is the expanded view of the outer peripheral face of rotating cylinder 130.
Figure 14 is the figure at the position shown in the arrow XIV of Figure 13 in enlarged representation cam path 131.
Figure 15 is the figure at the position shown in the arrow XV of Figure 13 in enlarged representation cam path 132.
Figure 16 is the sectional view same with Figure 11, but the state in non-shooting region.
Figure 17 is the sectional view same with Figure 12, but the state in non-shooting region.
Figure 18 is the expanded view of the inner peripheral surface of rotating cylinder 130.
Figure 19 is the figure same with Figure 14 of the cam path 131 ' involved by other embodiment.
Figure 20 is the expanded view same with Fig. 6 of the spiral-tube 230 involved by other embodiment.
Description of reference numerals：
1... digital camera；2... shoot part；3... camera body portion；4... flash light emission portion；5... shutter release button；
6... display part；7...EVF；8... switching switch；9... simultaneous ZSW is switched；100... lens barrel；110... outside
Fixed cylinder；111... guiding groove；112... the first holding frame；113... the second holding frame；114... guide shaft；115... the 3rd protect
Hold frame；115a... arm；116... guide shaft；117... the 4th holding frame；118... the 5th holding frame；119... tripper；
120... straight cylinder；121... projection；122... hole；The expanding hole portions of 122a...；122b... undergauge hole portions；130... rotation
Cylinder；131... cam path；131A... shooting area；131B... non-shooting region；131C... transitional region；131a... bottom
Face；131b... side；132... cam path；132A... shooting area；132B... non-shooting region；132C... transition region
Domain；132a... bottom surface；132b... side；133... cam path；133A... shooting area；133B... non-shooting region；
133C... transitional region；134... cam path；134A... shooting area；134B... non-shooting region；134C... transition region
Domain；135... road is imported；140... inner side fixed cylinder；150... pin；150a... cylindrical portion；150b... round plate；150c...
Frusto-conical portion；160... pin；160a... top surface；160b... circular conical surface；170... pin；180... pin；230... spiral-tube；
DG... secondary slot；DGA... shooting area；DGB... non-shooting region；DGC... road is imported；DH... secondary helical member；
HC... helical member；HG... helicla flute；HGA... shooting area；HGB... non-shooting region；HGC... road is imported；L1-
L5... lens group；MT... motor；Δ 1... minimum clearances；Δ 2... minimum clearances.
Embodiment
Hereinafter, embodiments of the present invention are illustrated referring to the drawings.Fig. 1 is as possessing involved by present embodiment
Lens barrel filming apparatus an example digital camera outside drawing.Fig. 1 (a) is the front view of digital camera 1, figure
1 (b) is rearview.
As shown in Fig. 1 (a), digital camera 1 is by the shoot part 2 with lens barrel and capturing element and photograph owner
Body portion 3 is formed.
The solid-state image pickup elements such as lens barrel and CCD of the shoot part 2 by that can carry out zoom action are formed, and can be passed through
The subject picture being imaged via lens barrel is converted to picture signal by solid-state image pickup element.
Camera body portion 3 has by LCD (Liquid Crystal Display：Liquid crystal display cells) form LCD
Display part 6, EVF (Electronic View Finder：Electronic viewfinder) 7 and by digital camera 1 and individual (not shown)
The external connection terminals of computer connection, the picture signal that is obtained as shoot part 2 is implemented as defined in signal transacting, can carry out
Shown to the image of LCD display parts 6, EVF7, to the image record of the recording mediums such as storage card (not shown) or to individual calculus
The processing of the image transmission of machine etc.
On the preceding surface in camera body portion 3, top appropriate location is provided with flash light emission portion 4.In addition, in camera
The back side of main part 3 is provided with the LCD display parts 6 and EVF7 of the display for carrying out shooting image and the regeneration display of record image.
Shutter release button 5 and the switching setting near shutter release button 5 are provided with the upper surface in camera body portion 3
The screening-mode (not shown) switching of " logging mode " and " regeneration mode " switchs.Logging mode is carried out from shooting holding state
Via spectrum assignment process to the photograph taking shot pattern, regeneration mode be shooting image by storage card is recorded in again
The raw pattern for being shown in LCD display parts 6, EVF7.
It is provided with the back side in camera body portion 3 and is used for zoom behaviour when playing and shoot by picture for reproduced picture
The regeneration of work is by picture playback switch and ZSW 9.Regeneration by the reproduced picture of picture playback switch and ZSW 9 by
Picture, which plays, to be referred to camera being set as regeneration mode and shows the image for being recorded in storage card successively together with picture numbering
Show the form in LCD display parts 6.It is further possible to it will show that change instruction is that ascending order direction (is clapped to the image of LCD display parts 6
Take the photograph the direction of order) or descending direction (direction opposite with shooting order).In addition, zoom operation during shooting can pass through behaviour
Regenerate by picture playback switch and ZSW 9 to make the photographing optical system as zoom lens to long sight direction or wide-angle
Direction scales.
Also, be provided with the back side in camera body portion 3 selection be used to carrying out LCD display parts 6 that image shows with
EVF7 EVF switchings switch 8.
In addition, the battery of the action power supply as digital camera 1 is internally provided with the bottom surface in camera body portion 3
(not shown).
Fig. 2 is mounted to the stereogram of the lens barrel 100 involved by the present embodiment of digital camera 1, and Fig. 3 is from light
The front view of lens barrel 100 is observed in direction of principal axis object side, and Fig. 4 is the lens barrel 100 in IV-IV lines cut away view 3 and to arrow
The figure of head direction observation.
The lens barrel 100 involved by present embodiment is illustrated by taking the zoom lens of 5 groups of compositions as an example.Lens mirror
Cylinder 100 have from object side successively by the first lens group L1, the second lens group L2, the 3rd lens group L3, the 4th lens group L4,
The optical system that 5th lens group L5 is formed.First lens group L1, the second lens group L2, the 3rd lens group L3, the 4th lens group
L4 sides change mutual group distance edge optical axis direction movement (displacement) to carry out zoom.In addition, the 4th lens group L4 is also only
Vertical moved along optical axis direction is focused.5th lens group L5 is the lens group not moved along optical axis direction during shooting.
Reference picture 4 illustrates to the brief configuration of lens barrel 100.Lens barrel 100 is on the outside of optical axis orthogonal direction
Rise and be coaxially disposed outside fixed cylinder 110, straight cylinder (frame part) 120, rotating cylinder (cartridge unit) 130 and inner side fixed cylinder
140, all of which is resin-made.The outside fixed cylinder 110 that camera body portion 3 is fixed in end is provided with along light in medial surface
A pair of guiding grooves 111 of direction of principal axis extension.The projection 121 engaged with guiding groove 111 is provided with the periphery of straight cylinder 120, by
This straight cylinder 120 can not move rotationally relative to outside fixed cylinder 110 along optical axis direction.In the object side of straight cylinder 120
The inner circumferential of end (being left end in Fig. 4) is provided with the first holding frame 112 for keeping the first lens group L1.
Detailed content describes later, but the inner circumferential of straight cylinder 120 is provided with metal pin (main snap-latch piece) 150 and tree
The pin (secondary snap-latch piece) 160 of fat.Only can be around the periphery for the rotating cylinder 130 that optical axis center rotates formed with storage remaining
The cam path (main slot) 131 of pin 150, and formed with the cam path (secondary slot) 132 of storage pin 160.Keep second saturating
Microscope group L2 the second holding frame 113 is fixed on along two guide shafts 114 (illustrate only one in Fig. 4) of optical axis direction extension
End.Guide shaft 114 engages with the hole (not shown) of inner side fixed cylinder 140, by sliding and being kept with second relative to the hole
Frame 113 moves along optical axis direction together.The 3rd lens group L3 in the fixed cylinder 140 of inner side is arranged at by the 3rd holding frame (frame portion
Part) 115 holdings.
In inner side fixed cylinder 140, the 4th lens group L4 is kept by the 4th holding frame 117, and the 4th holding frame 117 being capable of edge
Two guide shafts 116 for being fixed on inner side fixed cylinder 140 and along optical axis direction extending to move in the direction of the optical axis.5th lens group
L5 is fixed on the end of outside fixed cylinder 110 by the 5th holding frame 118.In addition, it is configured with the 3rd lens group L3 object side
Tripper 119.
Fig. 5 is the 3rd holding frame 115 and the stereogram of tripper 119.As illustrated, the 3rd holding frame 115 is by two
Guide shaft 116 is kept.In addition, it is integrally formed with arm in a manner of extending from the periphery of the 3rd holding frame 115 along optical axis direction
115a, also from arm 115a by radial outside in a manner of prominent fixed configurations have the pin of metal pin 170 and resin-made
180.In addition, shown in Fig. 9 as be described hereinafter, the pin 170 as main snap-latch piece is accommodated in the cam to be formed in the inner circumferential of rotating cylinder 130
In groove (main slot) 133, the pin 180 as secondary snap-latch piece is accommodated in the cam path (vice card to be formed in the inner circumferential of rotating cylinder 130
Close groove) in 134.
Fig. 6 is the stereogram removed straight cylinder 120 and rotating cylinder 130 from lens barrel 100 and shown, Fig. 7 is from optical axis
The front view of Fig. 6 structure is observed in direction object side, and Fig. 8 is the side view of Fig. 6 structure from optical axis orthogonal direction, Fig. 9
Be IX-IX lines cut away view 7 structure and to the direction of arrow observe sectional view, Figure 10 be X-X lines cut away view 8 structure simultaneously
The sectional view observed to the direction of arrow.Figure 11,12 are that position shown in arrow XI, XII in the structure by Figure 10 is amplified respectively
Figure.
As shown in Fig. 6,10, it is substantially rectangular to be spaced in the image side end periphery of straight cylinder 120 according to 60 degree formed with projection
The projection 121 of shape.The projection 121 of top in Fig. 10 is formed in the projection 121 with separating 120 ° of configurations in the circumferential direction from it
There is shoulder hole 122.
As shown in figure 11, shoulder hole 122 has expanding hole portion 122a and undergauge hole portion 122b.In addition, metal pin 150
With the shape that cylindrical portion 150a, round plate 150b and frusto-conical portion 150c coaxially link.By cylindrical portion 150a
Undergauge hole portion 122b is inserted through, and round plate 150b is abutted with expanding hole portion 122a, so as to which pin 150 is installed on shoulder hole 122.
On the other hand, the inner circumferential side ground swell as shown in figure 12 of 3 projections 121 for not forming shoulder hole in straight cylinder 120
It is frusto-conical to rise, and it forms the pin 160 of resin-made.Pin 160 has flat top surface 160a and is connected with top surface 160a
Circular conical surface 160b.
The storage of pin 150 is configured to be formed in the cam path 131 of the periphery of rotating cylinder 130, and the storage of pin 160 is configured to be formed
In the cam path 132 of the periphery of rotating cylinder 130.Cam path 131,132 is equally spaced formed in the circumferential direction.Cam path 131,
132 are of similar shape in design, in two sides with towards bottom and close taper in Figure 11,12 section
Shape.More specifically, cam path 131 has bottom surface 131a and a pair of side 131b being connected with bottom surface 131a.In addition, cam path
132 also have bottom surface 132a and a pair of side 132b being connected with bottom surface 132a.
Figure 13 is the expanded view of the outer peripheral face of rotating cylinder 130.Figure 14 is the arrow of Figure 13 in enlarged representation cam path 131
The figure at the position shown in XIV, Figure 15 are the figure at the position shown in the arrow XV of Figure 13 in enlarged representation cam path 132, but are
It is readily appreciated that, exaggerates groove width respectively, in addition, with dotted line shows the master of pin 150,160 observed to same direction
Want position profile.
In fig. 14, cam path 131 have shooting when pin 150 residing for shooting area (the 11st region) 131A with shooting with
The non-shooting region 131B for (being referred to as non-shooting) residing for pin 150 when outer.Non-shooting region 131B has and shooting area 131A
Transitional region (the 13rd region) 131C that connection and groove width gradually broaden with remote shooting area 131A.Transitional region 131C
Non-shooting region 131B in addition is the 12nd region.
In shooting area 131A, as shown in figure 11, pin 150 is in the state of the side 131b with cam path 131 is contacted
It is relative to slide.Pin 150 is in shooting area 131A, by mobile and with zoom lens to the side away from non-shooting region 131B
Mode close to long sight side drives straight cylinder 120, or by close to the movement of non-shooting region 131B side and to become
Focus lens drive straight cylinder 120 close to the mode of wide-angle side, the optical axis direction thus, it is possible to carry out high-precision zoom lens
Positioning.On the other hand, in the 131B of non-shooting region, as shown in figure 16, pin 150 is in the not side 131b with cam path 131
The state of contact.
Here, the frusto-conical portion 150c of pin 150 and the side 131b of cam path 131 minimum clearance are being set to Δ 1
When, if the minimum clearance Δ 1 in non-shooting region 131B beyond transitional region 131C is A, the minimum in transitional region 131C
Clearance delta 1 is B, although then B increases away from shooting area 131A with pin 150, A ＞ B are necessarily set up.In addition, transition region
Minimum clearance Δ 1 (=B) in the 131C of domain increases from the lateral non-shooting region 131B sides displacements of shooting area 131A with pin 150
Greatly.So, transitional region 131C is set in a manner of gradually changing minimum clearance Δ 1, shot so as to suppress pin 150
Drastically change of driving sound when being moved between region 131A and non-shooting region 131B etc..
In fig.15, cam path 132 have shooting when pin 160 residing for shooting area (the 21st region) 132A with shooting with
The non-shooting region 132B for (being referred to as non-shooting) residing for pin 160 when outer.Non-shooting region 132B has and shooting area 132A
Transitional region (the 23rd region) 132C that connection and groove width become narrow gradually with remote shooting area 132A.Transitional region 132C
Non-shooting region 132B in addition is the 22nd region.
In the 132B of non-shooting region, as shown in figure 17, the state that pin 160 contacts in the side 131b with cam path 131
Lower relative slip.Therefore, pin 160 is driven in the 132B of non-shooting region by the side movement to remote shooting area 132A
Straight cylinder 120, so as to which lens barrel is in retracted mode.On the other hand, in shooting area 132A, as shown in figure 12, pin 160
In the state not contacted with the side 132b of cam path 132.
Here, when the circular conical surface 160b of pin 160 and the side 132b of cam path 132 minimum clearance are set into Δ 2, if
Minimum clearance Δ 2 in shooting area 132A is C, and the minimum clearance Δ 2 in transitional region 132C is D, although then D is with pin
160 are reduced away from shooting area 132A, but C ＞ D are necessarily set up.In addition, in transitional region 132C minimum clearance Δ 2 (=
D) as pin 160 is reduced from the lateral non-shooting region 132B sides displacements of shooting area 132A.So, so that minimum clearance Δ 2
The mode gradually changed sets transitional region 132C, so as to suppress pin 160 in shooting area 132A and non-shooting region
Drastically change of driving sound when being moved between 132B etc..
Figure 18 is the expanded view of the inner peripheral surface of rotating cylinder 130.In figure, rotating cylinder 130 inner peripheral surface formed with pin
The opposed cam path 133 of 170 (reference pictures 5,9), the cam path 134 opposed with pin 180 (reference picture 6,9), connection cam path 133
And the shared importing road 135 of each one end of cam path 134 and the periphery of rotating cylinder 130.During assembling, make rotating cylinder 130 with
3rd holding frame 115 (Fig. 6) relatively moves along optical axis direction, so that pin 170,180 is entered by shared importing road 135,
Then rotating cylinder 130 is made to be relatively rotated with the 3rd holding frame 115, so as to which pin 170 is configured in cam path 133, by pin
180 are configured in cam path 134.
(it is referred to as when beyond shooting area (the 11st region) 133A and shooting when cam path 133 has shooting residing for pin 170
Non-shooting) non-shooting region 133B residing for pin 170.Non-shooting region 133B has to be connected and groove width with shooting area 133A
With transitional region (the 13rd region) 133C gradually to be broadened away from shooting area 133A.Non- bat beyond transitional region 133C
It is the 12nd region to take the photograph region 133B.
In shooting area 133A, pin 170 with sliding relatively in the state of the contacts side surfaces of cam path 133.Therefore, sell
170 in shooting area 133A by the side away from non-shooting region 133B it is mobile and with zoom lens close to long sight side
Mode drive the 3rd holding frame 115, or by being connect to close to non-shooting region 133B side is mobile with zoom lens
The mode of nearly wide-angle side drives the 3rd holding frame 115, is positioned thus, it is possible to the optical axis direction for carrying out the high zoom lens of precision.
On the other hand, in the 133B of non-shooting region, pin 170 is in the state not contacted with cam path 133.
Here, although not shown, but when the minimum clearance of pin 170 and cam path 133 is set into Δ 1, if transitional region
The minimum clearance Δ 1 in the 133B of non-shooting region beyond 133C is A, and the minimum clearance Δ 1 in transitional region 133C is B, then
Although B increases away from shooting area 133A with pin 170, A ＞ B are necessarily set up.In addition, the minimum in transitional region 133C
Clearance delta 1 (=B) increases from the lateral non-shooting region 133B sides displacements of shooting area 133A with pin 170.So, so that most
The mode that small―gap suture Δ 1 gradually changes sets transitional region 133C, so as to suppress pin 170 in shooting area 133A and non-bat
Drastically change of driving sound when moving etc. is taken the photograph between the 133B of region.
In addition, in figure 18, cam path 134 has a case that (to refer to that lens group is located at the position that can be shot) during shooting
(non-shooting when beyond shooting area (the 21st region) 134A and shooting residing for pin 180：Referring to that lens group is located at can not shoot
Position situation) non-shooting region 134B residing for pin 180.Non-shooting region 134B have be connected with shooting area 134A and
Groove width is with away from shooting area 134A and by transitional region (the 23rd region) 134C to narrow.It is non-beyond transitional region 134C
Shooting area 134B is the 22nd region.
In the 134B of non-shooting region, pin 180 with sliding relatively in the state of the contacts side surfaces of cam path 134.Therefore,
Pin 180 is in the 134B of non-shooting region, by driving the 3rd holding frame 115 to the side movement away from shooting area 134A,
So as to which lens barrel is in retracted mode.On the other hand, in shooting area 134A, pin 180 is in and not contacted with cam path 134
State.
Here, although not shown, but when the minimum clearance of pin 180 and cam path 134 is set into Δ 2, if shooting area
Minimum clearance Δ 2 in 134A is C, and the minimum clearance Δ 2 in transitional region 134C is D, although then D is as pin 180 is away from clapping
Take the photograph region 134A and reduce, but C ＞ D are necessarily set up.In addition, minimum clearance Δ 2 in transitional region 134C is as pin 180 is from bat
Take the photograph the lateral non-shooting region 134B sides displacements of region 134A and reduce.So, so that what minimum clearance Δ 2 (=D) gradually changed
Mode sets transitional region 134C, is moved so as to suppress pin 180 between shooting area 134A and non-shooting region 134B
When the drastically change of driving sound etc..In addition, in pin 170,180 and cam path 133,134, except the part illustrated with
Outside, it is same with the structure of pin 150,160 and cam path 131,132.
Action to lens barrel 100 illustrates.During zoom action, the motor MT rotations shown in Fig. 2, so as to via not
The Poewr transmission mechanism of diagram, rotating cylinder 130 rotate.Then, the cam path 131 of rotating cylinder 130 is in rotary moving, so as to pin 150
Bear driving force on optical axis direction and direction of rotation, but straight cylinder 120 is because of the projection 121 that engages with guiding groove 111 and only
It can advance, thus be moved corresponding to the rotation of rotating cylinder 130 along optical axis direction.Thus the first lens group L1 is to optical axis direction
Assigned position displacement.
Also, the second holding frame 113 has respectively to be engaged with the cam path (not shown) for the inner circumferential for being arranged at rotating cylinder 130
Pin (not shown), corresponding to the rotation of rotating cylinder 130, along the hole (not shown) slided for guide shaft 114 in the direction of the optical axis
It is mobile.Thus assigned position displacements of the second lens group L2 to optical axis direction.
In addition, the 3rd holding frame 115 bears to drive from the cam path 132 for the inner circumferential for being arranged at rotating cylinder 130 via pin 170
Power, thus guided by guide shaft 116, and assigned position displacements of the 3rd lens group L3 to optical axis direction.
4th holding frame 117 is via motor (not shown) and Poewr transmission mechanism along optical axis direction displacement.For making rotation
The motor of the 4th holding frame 117 of motor MT and driving of the rotation of cylinder 130 is in zoom action according to the letter from digital camera 1
Number linkage, it is thus possible to make the lens group L4 of the first lens group L1~the 4th respectively to the position displacement suitable for zoom.5th lens
Group L5 is not moved.In addition, the motor of the 4th holding frame 117 of driving is independently driven according to the signal from digital camera 1, thus
The 4th lens group L4 can only be made during focusing along optical axis direction displacement.
On the other hand, OFF operations (opening operation) are carried out to power switch (not shown), so as to pin 160 and cam path 132
Non-shooting region 132B engagings, straight cylinder 120 driven to image side, and the second holding frame 113 is also driven to image side, in addition,
Pin 180 engages with the non-shooting region 134B of cam path 134, and the 3rd holding frame 115 is driven to image side, and the 4th holding frame
117 also move to same direction, and lens barrel 100 is in the retracted mode shown in Fig. 4.
According to above-mentioned present embodiment, in shooting, pin 150 contacts with cam path 131, and pin 170 and cam path 133
Contact, thus allow for the high-precision optical axis direction positioning of zoom lens.In addition, shooting when, pin 160 not with cam path
132 contacts, and pin 180 does not contact with cam path 134, even if thus cam path 132,134 shape because of foozle etc.
In the case of difference, it can also suppress the competition via cam path.
On the other hand, in non-shooting, substitute pin 160 and contacted with cam path 132, and pin 180 contacts with cam path 134
Situation so that pin 150 does not contact with cam path 131, and pin 170 does not contact with cam path 133, thus makes digital phase by mistake
In the case that machine 1 drops, pin 160 and cam path 132 and pin 180 that impact is contacted with each other first are inhaled with cam path 134
Receive.Thus, suppress hitting for pin 150 and cam path 131 to connect or pin 170 connects with hitting for cam path 133, can also ensure that after the drops
High-precision zoom lens driving.In addition, in the case where impact is excessive, there is also cause connecing for pin 150 and cam path 131
Touch or the possibility of pin 170 and the contact of cam path 133, but in these cases, also utilize the pin 160 and cam path first contacted
132 and pin 180 and cam path 134 absorb the major part of impact, thus effectively avoid plastic deformation of pin 150,170 etc.,
Thus, it is possible to ensure high-precision zoom lens driving.In addition, in non-shooting, pin 160 and the cam path 132 of resin-made connect
Touch, and the pin 180 of resin-made contacts with cam path 134, it is thus possible to expect that the positioning precision of each lens drops to a certain degree
It is low, but due to being non-shooting, so problem will not be produced especially.
Figure 19 is the figure same with Figure 14 of the cam path 131 ' of other embodiment.In the present embodiment, cam path
131 ' have the shooting area 131A and non-shooting region 131B residing for non-shooting pin 150 when shooting residing for pin 150.Its
In, as illustrated, shooting area 131A is identical with the section shape of the cam path 131 ' in the 131B of non-shooting region.Therefore, exist
In present embodiment, in shooting and non-shooting whole region, pin 150 contacts with cam path 131 '.In addition
Structure is same with above-mentioned embodiment.
Different from the embodiment described above, in the present embodiment, in non-shooting, pin 160 contacts with cam path 132, and
And pin 180 contacts with cam path 134, in addition, pin 150 contacts with cam path 131, and pin 170 connects with cam path 133
Touch, thus i.e. 6 pins contact with 6 cam paths.Therefore, in the case where making digital camera 1 drop by mistake, impact is by 6 pairs of pins
And the scattered absorption of cam path, thus high-precision zoom lens driving is can also ensure that after the drops.Effect in addition
It is same with above-mentioned embodiment.
Figure 20 is the expanded view same with Fig. 6 of the spiral-tube 230 involved by other embodiment.The spiral of this variation
Cylinder (cartridge unit) 230 equally spaced forms HG and 3 secondary slot DG of 3 helicla flutes (main slot) to replace cam path.
Metal helical member (main snap-latch piece) HC protruded from frame part (not shown) is each configured with helicla flute HG, in addition,
Secondary helical member (the vice card conjunction from the resin-made for keeping the frame part of lens (not shown) to protrude is each configured with secondary slot DG
Piece) DH.
(it is referred to as when beyond shooting area (the 11st region) HGA, shooting when helicla flute HG has shooting residing for helical member HC
Non-shooting) non-shooting region HGB residing for helical member HC and import road HGC.Each helical member HC is outside spiral-tube 230
Portion is configured in the HGB of non-shooting region by importing road HGC.In addition, non-shooting region HGB can also be set and shooting area
The transitional region that HGA connections and groove width gradually broaden with remote shooting area HGA.In this case, transitional region
13 regions, the non-shooting region HGB beyond the transitional region is the 12nd region.In this case helical member HC and helicla flute HG's
The relation of minimum clearance Δ 1 is same with above-mentioned embodiment.
In shooting area HGA, helical member HC is relative in the state of being contacted with helicla flute HG to be slided.Therefore, helical member
HC in shooting area HGA by away from non-shooting region HGB side movement and zoom lens close to long sight side, or
By to close to non-shooting region HGB side movement and zoom lens close to wide-angle side, it is high thus, it is possible to carry out precision
The optical axis direction positioning of zoom lens.On the other hand, in the HGB of non-shooting region, helical member HC is in and not connect with helicla flute HG
Tactile state, thus in the case where the state makes digital camera drop by mistake, hitting for helical member HC and helicla flute HG can be suppressed
Connect, therefore high-precision zoom lens driving is can also ensure that after dropping.
In addition, in fig. 20, the shooting area (the 21st region) when secondary slot DG has shooting residing for pair helical member DH
The non-shooting region DGB for (being referred to as non-shooting) residing for secondary helical member DH when DGA is with beyond shooting.Secondary helical member DH is from spiral-tube
230 outside is configured in the DGB of non-shooting region by importing road DGC.In addition, non-shooting region DGB can also set and clap
Take the photograph region DGA connections and groove width is with the transitional region become narrow gradually away from shooting area DGA.In this case, transition region
Domain is the 23rd region, and the non-shooting region DGB beyond the transitional region is the 22nd region.In this case secondary helical member DH and pair
The relation of slot DG minimum clearance Δ 2 is same with above-mentioned embodiment.
In the DGB of non-shooting region, secondary helical member DH is relative in the state of being contacted with secondary slot DG to be slided.Therefore,
Secondary helical member DH is in the DGB of non-shooting region, by being retracted to mobile be in and lens barrel in the side away from shooting area DGA
State, in the case where the state makes digital camera drop by mistake, the secondary helical member DH to contact with each other and secondary slot can be utilized
DG suppresses impact.On the other hand, in shooting area DGA, secondary helical member DH is in the state not contacted with secondary slot DG,
Zoom action thus will not be hindered.Structure in addition is same with above-mentioned embodiment.
As another other embodiment, can also be arranged in shooting area HGA and the sides of non-shooting region HGB two, spiral shell
Rotating part HC contacts with helicla flute HG.Thus, contacted in non-shooting, helical member HC with helicla flute HG, and secondary helical member DH with
Secondary slot DG contacts, thus 6 pairs of helical members contact with groove.Therefore, in the case where making digital camera 1 drop by mistake, impact
By 6 pairs of helical members and the scattered absorption of groove, thus high-precision zoom lens driving is can also ensure that after dropping.Effect in addition
Fruit is same with above-mentioned embodiment.
Claims (9)
1. a kind of lens barrel, its by lens remain can along optical axis direction displacement, wherein,
The lens barrel has：
Cartridge unit, it possesses main slot and secondary slot in side face；With
Frame part, it possesses the main snap-latch piece engaged with the main slot and the vice card being configured in the secondary slot is closed
Piece,
The lens are maintained at least one party of cartridge part and the frame part,
When making cartridge part be relatively rotated with the frame part, the main snap-latch piece moves along the main slot is relative
It is dynamic, and the secondary snap-latch piece relatively moves along the secondary slot,
In shooting, the main snap-latch piece contacts with the main slot, so as to carry out the positioning of the optical axis direction of the lens,
In non-shooting, the secondary snap-latch piece contacts with the secondary slot.
2. lens barrel according to claim 1, wherein,
In shooting, the secondary snap-latch piece does not contact with the secondary slot.
3. lens barrel according to claim 1 or 2, wherein,
In non-shooting, the main snap-latch piece does not contact with the main slot.
4. lens barrel according to claim 3, wherein,
Residing for main snap-latch piece described in the 11st region, non-shooting when the main slot has shooting residing for the main snap-latch piece
The 12nd region and link the 13rd region in the 11st region and the 12nd region, if the 12nd region with it is described
The minimum clearance of main snap-latch piece is A, and the 13rd region and the minimum clearance of the main snap-latch piece are B, then A ＞ B are set up.
5. lens barrel according to claim 4, wherein,
The minimum clearance B increases with the 12nd area side displacement described in the main snap-latch piece from the 11st field side.
6. lens barrel according to claim 1 or 2, wherein,
In non-shooting, the main snap-latch piece contacts with the main slot.
7. lens barrel according to claim 1 or 2, wherein,
Residing for secondary snap-latch piece described in the 21st region, non-shooting when the secondary slot has shooting residing for the secondary snap-latch piece
The 22nd region and link the 23rd region in the 21st region and the 22nd region, if the 21st region with it is described
The minimum clearance of secondary snap-latch piece is C, and the 23rd region and the minimum clearance of the secondary snap-latch piece are D, then C ＞ D are set up.
8. lens barrel according to claim 7, wherein,
The minimum clearance D is reduced with the 22nd area side displacement described in the secondary snap-latch piece from the 21st field side.
9. lens barrel according to claim 1 or 2, wherein,
The main snap-latch piece is metallic pin, and the secondary snap-latch piece is resin pins.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-178441 | 2016-09-13 | ||
| JP2016178441A JP6737095B2 (en) | 2016-09-13 | 2016-09-13 | Lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107817570A true CN107817570A (en) | 2018-03-20 |
| CN107817570B CN107817570B (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710812931.5A Active CN107817570B (en) | 2016-09-13 | 2017-09-11 | Lens barrel |
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| Country | Link |
|---|---|
| JP (1) | JP6737095B2 (en) |
| CN (1) | CN107817570B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117826364A (en) * | 2024-02-26 | 2024-04-05 | 智领互动(江苏)科技发展有限公司 | Image focusing control mechanism of VR equipment |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6737095B2 (en) | 2020-08-05 |
| CN107817570B (en) | 2021-04-13 |
| JP2018045024A (en) | 2018-03-22 |
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