CN1246734C - Positioning device for camera lens and its focusing device - Google Patents

Positioning device for camera lens and its focusing device Download PDF

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Publication number
CN1246734C
CN1246734C CN02121366.6A CN02121366A CN1246734C CN 1246734 C CN1246734 C CN 1246734C CN 02121366 A CN02121366 A CN 02121366A CN 1246734 C CN1246734 C CN 1246734C
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CN
China
Prior art keywords
locating wheel
limit
ratchet
pedestal
fixed
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Expired - Fee Related
Application number
CN02121366.6A
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Chinese (zh)
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CN1464333A (en
Inventor
蔡镇硕
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Yudong Plasm Technology Co., Ltd.
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Primax Electronics Ltd
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Priority to CN02121366.6A priority Critical patent/CN1246734C/en
Publication of CN1464333A publication Critical patent/CN1464333A/en
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Publication of CN1246734C publication Critical patent/CN1246734C/en
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Abstract

The present invention provides a lens used for a camera and a focusing locating mechanism of the lens. The camera lens comprises a base, a focusing lens sheet, a locating wheel, an actuating element and a clamping device, wherein the base comprises a cylindrical vertical circular hole. The focusing lens sheet is fixed in the circular hole in a rotatable mode, the locating wheel is fixed on the base in a rotatable mode, and a side edge of the locating wheel in the horizontal direction comprises a ratchet edge, a smooth edge, a first end and a second end. The actuating element is fixed on the base in a horizontal movement mode for driving the focusing lens sheet and the locating wheel, the clamping device comprises a horizontal rotary arm and a vertical rod, and the horizontal rotary arm can move above the locating wheel. Therefore, the vertical rod fixed below the horizontal rotary arm can contact side edges of locating wheel positioned in the horizontal direction.

Description

Camera lens and its focusing detent mechanism
Technical field
The invention provides a kind of focusing detent mechanism, particularly a kind of focusing detent mechanism that is used for camera lens.
Background technology
Please refer to Fig. 1, Fig. 1 is the vertical view of the lens driving apparatus 10 of traditional camera.Lens driving apparatus 10 is to be disclosed in No. 5,680,649, United States Patent (USP) numbering, and name is called " lens driving apparatus with camera of automatic focus function ".Lens driving apparatus 10 includes a pedestal 12, and it includes a columniform vertical circular hole 16, one focusing lens 14 rotatably is fixed in the circular hole 16, one driving ring 40 is fixed on the pedestal 12 in mode that can sideway swivel outside the circular hole 16 of pedestal 12, it is to be fixed on the pedestal 12 in the mode that fastens with driving ring 40 for one shutter interlock ring 44, one setting element 42, it is to be fixed on the pedestal 12 in the mode that fastens with driving ring 40 and setting element 42 for one camera lens interlock ring 18, one first bi-directional drive motor 20 and one second bi-directional drive motor 30 are fixed on the pedestal 12 respectively, one flexible member 34 is fixed on the pedestal, and a solenoid valve 22 is located on the pedestal 12.In addition, driving ring 40 be provided with one columniform protruding 46 its be with camera lens interlock ring 18 on an actuated element 19 tablings, make that camera lens interlock ring 18 also can and then be pushed and then drive the rotation of focusing lens 14 when driving ring 40 is driven rotations.The second bi-directional drive motor 30 is to be used for driving shutter interlock ring 44 with the unlatching of control shutter (not shown) and cut out.The first bi-directional drive motor 20 is to be used for driving solenoid valve 22 so that setting element 42 is fixed on the predeterminated position, and and then interlock focusing lens 14 it is rotated on the corresponding position.In addition, the drive connection between setting element 42 and the solenoid valve 22 is to reach via a neutral gear 70 and one first ratchet 50.
As shown in Figure 1, when the second bi-directional drive motor 30 via one second ratchet 32 drive shutter interlock ring 44 towards forward rotation when controlling the open site of this shutter, shutter interlock ring 44 can promote driving ring 40 interlock camera lens interlock rings 18 and drive focusing lens 14 rotations, simultaneously, driving ring 40 also can promote setting element 42 and makes a plurality of ratchets 43 of setting element 42 to engage with the open handle 60 of a shutter seriatim.Setting element 42 can rotate via drive first ratchet 50 with the tooth portion tabling of neutral gear 70.
When the second bi-directional drive motor 30 continues to drive shutter interlock ring 44 towards forward rotation to a predeterminated position (this predeterminated position is the appropriate location of user institute desire focusing), the first bi-directional drive motor 20 can control electromagnetic valve 22 be rotated further to prevent first ratchet 50, at this moment, because the effect of pulling back that the prevention effect of solenoid valve 22 can stop flexible member 34 to be produced for setting element 42, therefore, camera lens interlock ring 18 and shutter interlock ring 44 all can not produce rotating action, and make lens driving apparatus 10 reach the purpose that focuses on and locate.At this moment, 44 on shutter interlock ring can arrive the position of default open shutter and open shutter, and camera lens interlock ring 18 also can drive focusing lens 14 rotates on this corresponding position it.
The second bi-directional drive motor continued towards forward rotation in 30 minutes and drives shutter interlock ring 44 to one extreme positions 45,20 in the first bi-directional drive motor can drive solenoid valve 22 simultaneously and rotate first ratchet 50, makes first ratchet 50 and setting element 42 can turn to its corresponding extreme position respectively.This moment, the second bi-directional drive motor 30 can not provide any electric power to lens driving apparatus 10, that is to say when the second bi-directional drive motor 30 to drive shutter interlock rings 44 to extreme position 45, lens driving apparatus 10 only need by the first bi-directional drive motor 20 provide slightly electric power so that the focusing detent mechanism of lens driving apparatus 10 (as: first ratchet 50, setting element 42, camera lens interlock ring 18, shutter interlock ring 44 and flexible member 34 etc.) return back on the reference position.After the first bi-directional drive motor driven solenoid valve 22 makes first ratchet 50 turn to its extreme position, the ratchet part of first ratchet 50 can break away from and the contacting of solenoid valve 22, a returning pull-spring 62 of being located on the pedestal 12 then can be towards oppositely flexibly being returned to its reference position with the open handle 60 of shutter, and this action is the closing motion of shutter.In addition, flexible member 34 also can be returned to its reference position with setting element 42 towards reverse elasticity ground, and linkedly shutter interlock ring 44, camera lens interlock ring 18 and first ratchet 50 is driven to its reference position.
From the above, the lens driving apparatus 10 of traditional camera has numerous and diverse focusing detent mechanism, and need a calutron and a gear combination, complexity and element cost are improved, and the structure of this high complexity also can't reduce assembly cost.In addition, though calutron can reach the function of precision positioning effectively, also reduced the usage space in the lens driving apparatus 10 of camera simultaneously.
Summary of the invention
Therefore, the invention provides a kind of focusing detent mechanism that is used in the camera lens, its simple design is significantly simplified the focusing detent mechanism of camera.
The object of the present invention is achieved like this, and a kind of camera lens promptly is provided, and it includes:
One pedestal, it includes a columniform vertical circular hole;
One driving ring is fixed on this pedestal in a movable manner;
One focusing lens rotatably is fixed in this circular hole, and when this focusing lens was rotated, this focus lamp sector-meeting descended or rises along this circular hole;
One locating wheel rotatably is fixed on this pedestal, and the side of its horizontal direction includes a ratchet limit, a level and smooth limit, and one first end and one second end lay respectively between two end points on this ratchet limit and level and smooth limit;
One activates element, is fixed on this pedestal in the mode that can move horizontally, and is used for driving this focusing lens and this locating wheel; And
One clamping device, it includes a horizontal rotary arm and is fixed in a movable manner on this pedestal, and a vertical rod that protrudes downwards is fixed in the downside of this horizontal rotary arm;
Wherein drive that the rotation of this focusing lens descends and when driving this locating wheel simultaneously and being rotated in the forward when this actuation element, the vertical rod of this clamping device can be slided to the ratchet limit of this locating wheel by first end of this locating wheel and along this ratchet limit card fixing apparatus.
Description of drawings
Fig. 1 is the vertical view of the lens driving apparatus of traditional camera.
Fig. 2 is inner each the combination of elements part drawing of the lens driving apparatus of camera of the present invention.
Fig. 3 is the vertical view of inner each element of the lens driving apparatus of Fig. 2 after assembling and appropriateness simplification.
Fig. 4 is the cut-open view of the bottom of the locating wheel of lens driving apparatus among Fig. 3 along hatching line A-A.
Fig. 5 is the phantom view of the locating wheel of lens driving apparatus among Fig. 3 along hatching line A-A.
Fig. 6 is the cut-open views of the superiors of the locating wheel of lens driving apparatus among Fig. 3 along hatching line A-A.
Symbol description
104 focusing lens, 106 vertical circular holes
110 driving rings, 112 actuation elements
114 interlock rings, 116 transmission handles
117 push rods, 118 camera lens traces
120 locating wheels, 122 ratchet limits
124 level and smooth limits, 125 first chutes
First end, 127 second chutes of 126 locating wheels
Second end, 130 clamping devices of 128 locating wheels
132 horizontal rotary arms, 134 vertical rods
136 flexible members, 140 step motor
142 first transmission gears
144 second transmission gears
111,115,123 tooth limits
The two ends on 113 tooth limits
103 stationary shaft
143, tooth portion on 146
141,145 lower tooth portions
Embodiment
All the conventional art with shown in Figure 1 is identical for the shutter interlinked mechanism of camera lens drive unit of the present invention and the interlock mode of shutter release, therefore below no longer with diagram and character narrate repeat specification.Please refer to Fig. 2 and Fig. 3.Fig. 2 is lens driving apparatus 100 inner each combination of elements part drawing of camera of the present invention.Fig. 3 is the vertical view of inner each element of the lens driving apparatus of Fig. 2 after assembling and appropriateness simplification.
As Fig. 2 and shown in Figure 3, lens driving apparatus 100 includes a pedestal 102, and it includes a columniform vertical circular hole 106, one focusing lens 104 rotatably is fixed in the circular hole 106, one driving ring 110 is fixed on the pedestal 102 in mode that can sideway swivel outside the circular hole 106 of pedestal 102, one locating wheel 120 rotatably is fixed on the pedestal 102, one activates element 112 is fixed on the pedestal 102 in the mode that can move horizontally, one interlock ring 114 is fixed on the pedestal 102 in the mode with driving ring 110 and actuation element 112 fluid-tight engagement, one clamping device 130 is fixed on the pedestal 102, one flexible member 136 is fixed on the pedestal 102, one step motor 140 is fixed on the pedestal 102, and one first transmission gear 142 and one second transmission gear 144 are that the mode that fastens with the tooth limit with driving ring 110 and actuation element 112 respectively is located on the pedestal 102.
Clamping device 130 includes a horizontal rotary arm 132, and it is to be fixed in a movable manner on the pedestal 102, and one the vertical rod 134 that protrudes downwards be fixed in the downside of horizontal rotary arm 132, horizontal rotary arm 132 and vertical rod 134 then can be made in integrated mode with a rubber-like metal wire body.The stage casing coiled annular of metal wire body is socketed on the stationary shaft 103 on the pedestal 102, and the two ends of metal wire body are then extended by the annular in stage casing and formed " V " font; Wherein an end forms horizontal rotary arm 132 and vertical rod 134, and the other end then is resisted against the side of pedestal 102.Make an end of horizontal rotary arm 132 be fixed on the stationary shaft 103 thus and done the elasticity turn.Flexible member 136 is to be connected with transmission handle 116 on the interlock ring 114, is used for flexibly fixing interlock ring 114 and and then drive the fixation of driving ring 110 and actuation element 112.Driving ring 110 has one section tooth limit 111 that protrudes from ring edge, is used for fastening with the last tooth portion 143 of first transmission gear 142.Step motor 140 is lower tooth portion 141 drivings, first transmission gear, 142 rotations via first transmission gear 142.Because the diameter of the last tooth portion 143 of first transmission gear 142 is that the diameter than lower tooth portion 141 is little, so 142 pairs of driving rings 110 of first transmission gear have the function of dwindling with respect to the amount of spin that step motor 140 moves.Second transmission gear 144 is amplification gears that one and first transmission gear 142 turns upside down and is provided with, and its lower tooth portion (not shown) is that the tooth limit 115 with interlock ring 114 fastens, and tooth portion 146 is that tooth limit 123 with actuation element 112 fastens on it.Include a camera lens trace 118 on the interlock ring 114 in addition, when step motor 140 drives 142 rotations of first transmission gear, the front end on the tooth limit 111 of driving ring 110 promotes the push rod 116 on the interlock ring 114, making interlock ring 114 order about second transmission gear 144 rotates and drive actuation element 112 rotational positioning wheel 120, simultaneously, 118 of the camera lens traces on the interlock ring 114 can drive focusing lens 104 along circular hole 106 rotation declines.
Locating wheel 120 is one to have the cross helical gear 120 of spiral circular arc element, the side of the horizontal direction of this circular arc element includes the outside that a ratchet limit 122 is positioned at the circular arc element of locating wheel 120, the one level and smooth limit 124 with one first chute 125 and one second chute 127 is positioned at the inboard of the circular arc element of locating wheel 120, and one first end 126 and one second end 128 lay respectively between two end points on ratchet limit 122 and level and smooth limit 124.The ratchet limit 122 of locating wheel 120 is the circumferential edge of sub-circular with level and smooth limit 124 and is be positioned at two differing heights on the circular arc element two-layer up and down, ratchet limit 122 is the upper stratas that are positioned at the circular arc element of locating wheel 120, and level and smooth limit 124 be positioned at the lower floor of circular arc element of locating wheel 120 and circle footpath than ratchet limit 122 for big.Therefore 132 tops that can flatly be displaced into the circular arc element of locating wheel 120 of the horizontal rotary arm of clamping device 130 make the vertical rod 134 that is fixed in horizontal rotary arm 132 downsides be touched each side that locating wheel 120 is positioned at horizontal direction.
Please refer to Fig. 4 to Fig. 6.Fig. 4 is the cut-open view of the bottom of the locating wheel of lens driving apparatus among Fig. 3 along hatching line A-A.Fig. 5 is the phantom view of the locating wheel of lens driving apparatus among Fig. 3 along hatching line A-A.Fig. 6 is the cut-open views of the superiors of the locating wheel of lens driving apparatus among Fig. 3 along hatching line A-A.First chute 125 on the level and smooth limit 124 of the circular arc element of locating wheel 120, be to be used for the bottom of vertical rod 134 of ccontaining clamping device 130, when the vertical rod 134 of clamping device 130 passes through first end 126 of locating wheel 120, the bottom of vertical rod 134 can upwards be imported the initiating terminal on ratchet limit 122 by the end of first chute 125 on level and smooth limit 124, the bottom that the initiating terminal on ratchet limit 122 then can be guided vertical rod 134 upwards slides to second end 128 of locating wheel 120 along level and smooth limit 124, and second chute 127 on second end 128 of locating wheel 120 is to be used for the bottom of the vertical rod 134 terminal initiating terminal that imports level and smooth limit 124 downwards by ratchet limit 122.
Extremely shown in Figure 6 as Fig. 3, when step motor 140 drives driving ring 110 towards forward rotation via first transmission gear 142, driving ring promoted interlock ring 114 in 110 minutes makes the camera lens trace 118 on the interlock ring 114 to descend along circular hole 10 rotations by drive focusing lens 104, and interlock ring 114 can make locating wheel 120 towards being rotated in the forward by promotion actuation element 112 via second transmission gear 144 simultaneously.116 of the transmission handles of interlock ring 114 can be subjected to the elastic reaction of flexible member 136 and be subjected to an elastic force of pulling back being applied to it.This moment, the vertical rod 134 of clamping device 130 can slide to the ratchet limit 122 of locating wheel 120 by first end 126 of locating wheel 120 and 122 slips along the ratchet limit.
When step motor 140 continues to drive driving ring 110 towards forward rotation to a predeterminated position (this predeterminated position is the appropriate location of user institute desire focusing), 140 of step motor can stop to utilize interlock ring 114 to drive focusing lens 104 rotations and descend, this moment, 134 of the vertical rods of clamping device 130 can fasten with the ratchet limit 122 of locating wheel 120, the elastic force effect that makes the position of actuation element 112 be fixed and can not be subjected to flexible member 136 and produced and being pulled focuses on and the effect of location to reach.
Ratchet limit 122 is to have a plurality of ratchets, and each ratchet all can provide 104 1 of focusing lens to focus on the position location, with in response to different focal position demands.Because the number of ratchet and the hop count that focusing lens is focused are directly proportional, so utilize dwindling and amplification of first and second transmission gear 142 and 144, can make focusing lens 104 under restrictive conditions such as the commentaries on classics width of cloth of step motor and the camera lens finite space, obtain focusing position location, and then promote the focusing control performance of camera lens than multistage.
Finished the action of focusing and location when focusing lens 104 after, step motor 140 can counter-rotating.This moment, actuation element 112 and interlock ring 114 still rested on the position location, had only driving ring 110 to be driven counter-rotating and removed to promote a shutter release (not shown) and finish photography and move with the other end 113 on tooth limit 111.
After the photography action is finished, when step motor 140 continues to utilize interlock ring 114 to drive focusing lens 104 rotation declines, 134 of the vertical rods of clamping device 130 can break away from the ratchet limit 122 of locating wheel 120, second end 128 by locating wheel 120 also slides to second chute 127 on the level and smooth limit 124 of locating wheel 120, and this moment, the focusing detent mechanism (as: driving ring 110, actuation element 112, locating wheel 120 and flexible member 136 etc.) of lens driving apparatus 100 reached its corresponding extreme position.Then, flexible member 136 can make the camera lens trace 118 on the interlock ring 114 drive focusing lens 104 along circular hole 106 rotation risings by pulling interlock ring 114, and makes actuation element 112 towards reverse rotation via the gearing of second transmission gear 144.When flexible member 136 pulling interlock rings 114 made actuation element 112 reverse rotations, step motor 140 itself also needed reverse rotation, in order to avoid cause the resistance of actuation element 112 reverse rotations.This moment, 134 of the vertical rods of clamping device 130 can be along second chute 127 on the level and smooth limit 124 of locating wheel 120 to lower slider, till getting back to its reference position by first end 126 of locating wheel 120, similarly, the focusing detent mechanism of lens driving apparatus 100 (as: driving ring 110, actuation element 112 and flexible member 136 etc.) also can be got back on its reference position.So promptly finished the program of the focusing location of camera lens drive unit 100.
Compared to conventional art, the lens driving apparatus 100 of camera of the present invention is with the maximum difference of the lens driving apparatus 10 of traditional camera: the focusing detent mechanism of lens driving apparatus 100 of the present invention does not only need to install additional any electronic equipment and gear set with the clamping device 130 and the locating wheel 120 of a simplicity of design as the element of locating, thus, not only increase the usage space in the camera lens drive unit, also therefore reduced the cost of manufacture of camera integral body.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.

Claims (10)

1. camera lens, it includes:
One pedestal, it includes a columniform vertical circular hole;
One driving ring is fixed on this pedestal in a movable manner;
One focusing lens rotatably is fixed in this circular hole, and when this focusing lens was rotated, this focus lamp sector-meeting descended or rises along this circular hole;
One locating wheel rotatably is fixed on this pedestal, and the side of its horizontal direction includes a ratchet limit, a level and smooth limit, and one first end and one second end lay respectively between two end points on this ratchet limit and level and smooth limit;
One activates element, is fixed on this pedestal in the mode that can move horizontally, and is used for driving this focusing lens and this locating wheel; And
One clamping device, it includes a horizontal rotary arm and is fixed in a movable manner on this pedestal, and a vertical rod that protrudes downwards is fixed in the downside of this horizontal rotary arm;
Wherein drive that the rotation of this focusing lens descends and when driving this locating wheel simultaneously and being rotated in the forward when this actuation element, the vertical rod of this clamping device can be slided to the ratchet limit of this locating wheel by first end of this locating wheel and along this ratchet limit card fixing apparatus.
2. camera lens as claimed in claim 1, wherein the ratchet limit of this locating wheel is the circumferential edge of sub-circular with level and smooth limit and is be positioned at two differing heights two-layer up and down, this ratchet limit be positioned at the upper strata and this level and smooth limit be positioned at lower floor and circle footpath than this ratchet limit for big, first end of this locating wheel is provided with one first chute, be used for the bottom of the vertical rod of this clamping device is upwards imported by the end on this level and smooth limit the top that opens on this ratchet limit, and second end of this locating wheel is provided with one second chute, is used for the terminal top that opens that imports this level and smooth limit downwards by this ratchet limit, the bottom of the vertical rod of this clamping device.
3. camera lens as claimed in claim 1, wherein this locating wheel includes a circular arc element, respectively there is a circular arc limit the inside and outside both sides of its horizontal direction, and the ratchet limit of this locating wheel and level and smooth limit are to be located on the circular arc limit of inside and outside both sides of this circular arc element.
4. camera lens as claimed in claim 3, wherein the circular arc element of this locating wheel is twist.
5. camera lens as claimed in claim 3, wherein the ratchet limit of this locating wheel is the outside of being located at this circular arc element, and the level and smooth limit of this locating wheel is the inboard of being located at this circular arc element.
6. camera lens as claimed in claim 3, wherein this horizontal rotary arm can move horizontally in the top of the circular arc element of this locating wheel and therefore make the vertical rod of its downside be touched each side that this circular arc element is positioned at horizontal direction.
7. camera lens as claimed in claim 1, wherein the horizontal rotary arm of this clamping device and vertical rod are to make in integrated mode with a rubber-like metal wire body.
8. camera lens as claimed in claim 1, it also includes:
One flexible member is fixed on this pedestal, is used for flexibly fixing this actuation element;
One step motor is fixed on this pedestal, is used for promoting this actuation element and makes it be driven this focusing lens and this locating wheel;
Wherein utilize this actuation element to drive that the rotation of this focusing lens descends and when driving this locating wheel simultaneously and being rotated in the forward when this step motor, the vertical rod of this clamping device can be slided to the ratchet limit of this locating wheel by first end of this locating wheel and along this ratchet limit card fixing apparatus.
9. camera lens as claimed in claim 8, wherein, this step motor then is to utilize this driving ring to drive this actuation element.
10. camera lens as claimed in claim 9, wherein this driving ring is to be fixed on this pedestal in mode that can sideway swivel outside the circular hole of this pedestal.
CN02121366.6A 2002-06-17 2002-06-17 Positioning device for camera lens and its focusing device Expired - Fee Related CN1246734C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN02121366.6A CN1246734C (en) 2002-06-17 2002-06-17 Positioning device for camera lens and its focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN02121366.6A CN1246734C (en) 2002-06-17 2002-06-17 Positioning device for camera lens and its focusing device

Publications (2)

Publication Number Publication Date
CN1464333A CN1464333A (en) 2003-12-31
CN1246734C true CN1246734C (en) 2006-03-22

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Application Number Title Priority Date Filing Date
CN02121366.6A Expired - Fee Related CN1246734C (en) 2002-06-17 2002-06-17 Positioning device for camera lens and its focusing device

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AT513128B1 (en) 2012-07-24 2014-02-15 Berndorf Band Gmbh Method for structuring a press belt

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Owner name: YUDONG PLASM TECHNOLOGY CO., LTD.

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Granted publication date: 20060322

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