CN102385134B - Zoom lens barrel - Google Patents
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- CN102385134B CN102385134B CN201110256637.3A CN201110256637A CN102385134B CN 102385134 B CN102385134 B CN 102385134B CN 201110256637 A CN201110256637 A CN 201110256637A CN 102385134 B CN102385134 B CN 102385134B
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- 230000033001 locomotion Effects 0.000 abstract description 5
- 230000003287 optical effect Effects 0.000 description 24
- 230000008602 contraction Effects 0.000 description 20
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- 238000003384 imaging method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
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Abstract
The invention provides a zoom lens barrel. A withdrawing structure of a withdrawing lens frame has no limit to the configuration of a cam groove for driving forward and backward motions of the lens frame and the configuration of a shooting unit, and is also miniaturized. The zoom lens barrel (1) has a fixed frame (2); a cam frame (5) which is rotatingly driven relative to the fixed frame (2) and has a cam groove for driving the withdrawing lens frame; two zoom frames (8) which are driven by the cam frame (5) to advance and retreat and have withdrawing cams (8d) for driving the withdrawing lens frame; three zoom frames which are driven by the cam frame (5) to advance and retreat; and a withdrawing lens frame (12) which is rotatably supported on the lens frame on the three zoom frames to hold a withdrawing lens (33). Under the shooting state, the withdrawing lens frame (12) is located at an entry position of the withdrawing lens (33) on a light path. During the period of changing the motion from the shooting state to the contracting state, the cam groove (5d) of the cam frame (5) and the withdrawing cams (8d) of the two zoom frames (8) are rotatingly driven to retreat to a retreat position (P2).
Description
Technical field
The Zoom lens barrel shortening while the present invention relates to have total length while keeping out of the way camera lens frame and non-photography state than photography state.
Background technology
As Zoom lens barrel in the past, the disclosed Zoom lens barrel of patent documentation 1 is the Zoom lens barrel that the total length of non-photography state while being contraction state shortens during than photography state.As shown in Figure 17, Figure 18, this lens barrel A1 has: fixed frame A2, and it supports each picture frame parts; Rotating frame A3; Zoom drive source; Focusing drive source; Keep out of the way camera lens frame A10, camera lens A23 is kept out of the way in its maintenance, there is rearward outstanding teat A10h, driven by above-mentioned zoom drive source, in the time of photography state, making to keep out of the way camera lens A23 is positioned in light path, with transfer from from photography state to contraction state in linkage, rotate and keep out of the way outside light path together with teat 10h; And focus lens frame A13, it keeps focus lens, drives advance and retreat by above-mentioned focusing drive source.
And, above-mentioned focus lens frame A13 is provided with the A13c of guide tracks portion, the A13c of this guide tracks portion for from photography state to shorten shrinkage direction drive driving condition time not with keep out of the way camera lens frame A10 butt, if produce abnormal driving when the driving condition driving at the shrinkage direction to above-mentioned shortening, with the teat A10h butt of keeping out of the way camera lens frame A10, with this teat butt in guide this teat along the rotary motion trace of this teat, thereby prevent the interference of the camera lens frame A13 that keeps out of the way camera lens frame A10 and rear side.
In addition, in above-mentioned Zoom lens barrel A1 in the past, keep out of the way the cam part outside light path as making to keep out of the way camera lens frame A10, will keep out of the way cam A14 and be fixed on the rear side of fixed frame A2.In detail, this is kept out of the way cam A14 and is fixed on the holding plate A15 of rear side of fixed frame A2 in the mode that is projected into phtographic lens optical axis O direction front side.The sensor base A16 that has installed camera element unit is installed at the back side of holding plate A15.In the time shifting from photography state to contraction state, keep out of the way cam A14 relatively approaching while keeping out of the way camera lens frame A10, with be located at keep out of the way on camera lens frame A10 from untie-sell A10c butt, slip, be rotated thereby keep out of the way camera lens frame A10 the retreating position (Figure 17) being driven into outside light path.
[patent documentation 1] TOHKEMY 2009-25557 communique
In the disclosed Zoom lens barrel A1 of above-mentioned patent documentation 1, for making to keep out of the way, camera lens frame A10 keeps out of the way keeps out of the way cam A14 and be fixed on the holding plate A15 of the rear side of fixed frame A2.Holding plate A15 engages with sensor base A16, disposes the image unit A26 being made up of imaging apparatus, light filter etc. on this sensor base A16.Be configured in holding plate A15 when upper when keeping out of the way cam A14, the configuration degree of freedom of image unit A26 disappears, the restriction being designed.Particularly, in the situation that image unit has image shake correction function, become spatially larger restriction, hinder miniaturization.
And, be configured on the holding plate A15 of rear side of fixed frame A2 owing to keeping out of the way cam A14, thereby also there is such problem: in by the lens barrel of the part assembled state before holding plate A15, sensor base A16 assembling, can not confirm to comprise and keep out of the way camera lens frame A10, keep out of the way the advance and retreat state of cam A14 at interior each picture frame.
And, the side of keeping out of the way cam A14 and need to insert the focus lens frame A13 that is configured in the rear side of keeping out of the way camera lens frame A10, therefore the shape of focus lens frame A13, configuration are restricted.
And, the rotational angle of the retreating position of the position light path of keeping out of the way camera lens frame A10 outside light path is large, in order to ensure this rotational angle, need to by with the position configuration from untie-sell A10c of keeping out of the way camera lens frame A10 of keeping out of the way cam A14 butt in the position that more approaches center of rotation.In the case of having applied such configuration, be difficult to make to keep out of the way camera lens frame A10 precision and turn to well retreating position, consider the deviation to a certain degree at this retreating position, be necessary to obtain significantly surplus.From this point of view, the abundant miniaturization of lens barrel becomes difficulty.
Summary of the invention
The present invention makes in order to address the above problem, the object of this invention is to provide a kind of Zoom lens barrel that can realize miniaturization, this Zoom lens barrel is to have the Zoom lens barrel of keeping out of the way camera lens frame of keeping out of the way under non-photography state, wherein, keep out of the way keeping out of the way mechanism and can not driving the configuration of cam path and the configuration of image unit of use cause restriction to picture frame advance and retreat of camera lens frame.
In order to solve above-mentioned problem, Zoom lens barrel of the present invention have under non-photography state, keep out of the way keep out of the way camera lens frame, it is characterized in that, described Zoom lens barrel has: fixed frame; The zoom drive source that zoom is used; The first frame, it is at least rotarilyd actuate by above-mentioned zoom drive source with respect to above-mentioned fixed frame, and has cam slot part; The second frame, it is driven by above-mentioned the first frame advance and retreat, and has cam part; The 3rd frame, it is driven by above-mentioned the first frame advance and retreat; And keep out of the way camera lens frame, it is the frame being supported on rotationally on above-mentioned the 3rd frame, keep keeping out of the way camera lens, when in photography state, be in the above-mentioned camera lens of keeping out of the way and be positioned at the in-position in light path, during the switching action from above-mentioned photography state to above-mentioned non-photography state, by the above-mentioned cam slot part of above-mentioned the first frame and be located at the above-mentioned cam part rotating drive on above-mentioned the second frame, kept out of the way being driven into the above-mentioned retreating position of lens retreat outside light path of keeping out of the way.
According to the present invention, a kind of Zoom lens barrel that can realize miniaturization can be provided, this Zoom lens barrel is to have the Zoom lens barrel of keeping out of the way camera lens frame of keeping out of the way under non-photography state, wherein, keep out of the way keeping out of the way mechanism and can not driving the configuration of cam path and the configuration of image unit of use cause restriction to picture frame advance and retreat of camera lens frame.
Accompanying drawing explanation
Fig. 1 illustrates that the Zoom lens barrel of an embodiment of the invention is the front view under contraction state at non-photography state;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is that the Zoom lens barrel of Fig. 1 is the longitudinal section under zoom wide-angle state at photography state;
Fig. 4 is the rear view that has taken off the state of the image unit of three groups of zoom frames, four groups of focusing frames and rear side under the contraction state of the Zoom lens barrel of Fig. 1;
Fig. 5 is the stereographic map of observing the state of the image unit that has taken off three groups of zoom frames, four groups of focusing frames and rear side under the contraction state of the Zoom lens barrel of Fig. 1 from rear side;
Fig. 6 is the rear view that has taken off the state of the image unit of four groups of focus frame and rear side under the zoom wide-angle state of the Zoom lens barrel of Fig. 1;
Fig. 7 is the stereographic map that has taken off the state of the image unit of four groups of focus frame and rear side from rear side observation under the zoom wide-angle state of the Zoom lens barrel of Fig. 1;
Fig. 8 is the stereographic map of observing the cam frame of the Zoom lens barrel that is applied to Fig. 1 from rear side;
Fig. 9 is the cam path stretch-out view of the inner peripheral surface of the cam frame of Fig. 8;
Figure 10 is the rear view that is applied to two groups of zoom frames of the Zoom lens barrel of Fig. 1;
Figure 11 is the B-B sectional view of Figure 10;
Figure 12 is the rear view that keeps the zoom wide-angle state of three groups of zoom frames keeping out of the way camera lens frame of the Zoom lens barrel that is applied to Fig. 1;
Figure 13 is the stereographic map of observing three groups of zoom frames of Figure 12 from rear side;
Figure 14 is the rear view of keeping out of the way camera lens frame shown in Figure 12;
Figure 15 be illustrate when in the lens barrel at Fig. 3 from zoom wide-angle state be switched the cam follower of two groups of zoom frames while being driven into contraction state, three groups of zoom frames and keep out of the way camera lens frame from untie-sell with respect to the slide expanded map of mobile state of the cam path of the inner peripheral surface of the cam frame of Fig. 9;
Figure 16 is the sectional view that the state that the butt follower of keeping out of the way camera lens frame of Figure 12 moves with respect to the projection cam of two groups of zoom frames of Figure 10 is shown accordingly with Figure 15;
Figure 17 is the longitudinal section of the contraction state of Zoom lens barrel in the past;
Figure 18 is the longitudinal section of the zoom wide-angle state of the Zoom lens barrel in the past of Figure 17.
Label declaration
2: fixed frame; 5: cam frame (the first frame); 5d: keep out of the way camera lens frame and drive with cam path (cam slot part); 8: two groups of zoom frames (the second frame); 8d: keep out of the way cam (cam part); 9: three groups of zoom frames (the 3rd frame); 12: keep out of the way camera lens frame; 41: the incorporating section, unit (zoom drive source) that is accommodated with spool gear etc.; P1: in-position; P2: retreating position.
Embodiment
Below, embodiments of the present invention are described.
Use Fig. 1～Figure 14 that the Zoom lens barrel 1 of an embodiment of the invention is described.
Zoom lens barrel 1 is such lens barrel: each picture frame is incorporated in fixed frame, the contraction state that above-mentioned each picture frame shortens from non-photography state stretches out, be switched to photography state (strictly speaking, photographic state), under this photography state, can zoom to the zoom state (being designated as below the state of looking in the distance) of looking in the distance from zoom wide-angle (being designated as below wide-angle state), and there is camera-shake calibration function.
In addition, in the following description, the optical axis of establishing phtographic lens is O, and establishing object side in this optical axis O direction is front, and being set as side is rear (rear side).And the sense of rotation of each parts is represented by the sense of rotation of observing from rear side.And, with the orthogonal direction of optical axis O in, in the time of the photography posture of common camera, establishing left and right directions is directions X, establishing above-below direction is Y-direction.
As shown in FIG. 1 to 3, Zoom lens barrel 1 has: fixed frame 2; Rotating frame 3, it is supported on fixed frame 2, and driving is rotated and advances and retreat in the time of zoom and when telescopic drive; Movable frame 4, it advances and retreat under rotation restriction state together with rotating frame 3; As the cam frame 5 of the first frame, it rotates together with rotating frame 3, and going forward side by side, it is moving to retire; Craspedodrome lead-frame 6, it advances and retreat under rotation restriction state together with cam frame 5; And sensor unit back up pad 16, its back part at fixed frame 2 supports sensor unit 15, can be in the displacement of XY direction.And, Zoom lens barrel 1 also has the picture frame being driven by advance and retreat under rotation restriction state,, from front side be followed successively by one group of zoom frame 7, as two groups of zoom frames 8 of the second frame, support three groups of zoom frames 9 and four groups of focusing frames 13 of conduct the 3rd frame of keeping out of the way camera lens frame 12.Zoom lens barrel 1 also has photographic optical system, the arrangement of mirrors head 31, being kept by one group of zoom frame 7, the two arrangement of mirrors heads 32 that kept by two groups of zoom frames 8, by the i.e. four arrangement of mirrors heads 34 of focus lens of keeping out of the way three arrangement of mirrors heads that camera lens frame 12 keeps and keeping out of the way camera lens 33 and kept by four groups of focusing frames 13.
Fixed frame 2 is the parts with perimembranous in cylinder, and perimembranous is provided with slot part and craspedodrome groove therein, and slot part is that the spire tilting with respect to optical axis O is connected and is formed with the front circumference slot part along circumference, and craspedodrome groove is along optical axis O.And, be provided with zoom unit and focusing unit at peripheral part, this zoom unit is the unit of the zoom drive for carrying out phtographic lens, comprises the zoom motor as zoom drive source, gear row, the spool gear (not shown) that are incorporated in incorporating section, unit 41; This focusing unit is the unit that the focusing for carrying out phtographic lens drives, and comprises focusing motor 42, gear row, feeding screw, leading axle.In addition, spool gear (not shown) is supported on the interior perimembranous of fixed frame 2 under the state exposing along the direction parallel with optical axis O.
Rotating frame 3 is parts cylindraceous, and rotatable and advance and retreat ground is embedded into the interior perimembranous of fixed frame 2, periphery rear portion be provided with cam follower and with the above-mentioned spool gear meshed gears 3a of portion.Under the state that this rotating frame 3 engages with the above-mentioned spire of fixed frame 2 at above-mentioned cam follower, be mounted, rotarilyd actuate by above-mentioned spool gear via gear part 3a.Rotate by this rotation on one side, reach photographic wide-angle position from punctured position on one side, stretch out above-mentioned cam follower under state and engage slidably with above-mentioned circumferential groove at this, afterwards, be driven in rotation in optical axis O direction the position of looking in the distance.
Craspedodrome lead-frame 6 is cylinder parts, is embedded in the interior week of movable frame 4, and rearward end and cam frame 5 bayonet joint, under the state by movable frame 4 restricting rotations, advance and retreat are mobile together with cam frame 5.
As shown in Figure 8, cam follower 23 has circular cone face 23a and the front end pin 23b of portion, and circular cone face 23a is embedded in the cam path being located on movable frame 4, and the front end pin 23b of portion is embedded at outer circumferential side and connects this cam path and be located in the craspedodrome groove on rotating frame 3.Therefore, cam frame 5 is in rotating with rotating frame 3 one, and the cam path advance and retreat that are moved frame 4 in optical axis O direction drive.
Be provided with one group of zoom frame at the peripheral part of cam frame 5 and drive with cam path 5a (Fig. 8), be provided with two groups of zoom frames in interior perimembranous and drive with cam path 5b, three groups of zoom frames driving cam path 5c and drive with cam path 5d (Fig. 9) as the camera lens frame of keeping out of the way of cam slot part.In addition, cam path 5d is by forming below: rear side, in open state, is formed on the craspedodrome cam slot part 5da of this open side along optical axis O direction; The tilting cam slot part 5db tilting with respect to optical axis O; Along exiting with cam slot part 5dc of sense of rotation; And be located at the rear peristome of cam path 5d, be projected into the jut 5dd at rear from craspedodrome cam slot part 5da.Above-mentioned cam slot part is with respect to the cam path from the gapped state of untie-sell 12b (Fig. 9, Figure 15) of keeping out of the way camera lens frame 12 described later that should engage with this cam path.
One group of zoom frame 7 is cylinder-like parts, is embedded in the interior perimembranous of craspedodrome lead-frame 6, and is embedded in the peripheral part of cam frame 5 and supported under the state that is limited rotation.One arrangement of mirrors head 31 is kept by the front openings portion of one group of zoom frame 7, is provided with the lens barrier 35 above that can open and close this arrangement of mirrors head 31 in this front openings portion.The outstanding cam follower arranging of interior perimembranous at one group of zoom frame 7 is embedded in the cam path 5a of cam frame 5 slidably.Therefore, one group of zoom frame 7 is followed being rotated in by being driven by advance and retreat under the state of craspedodrome lead-frame 6 restricting rotations of cam frame 5.
As shown in Figure 10, Figure 11, two groups of zoom frames 8 are cylinder-like parts, and the interior week that is embedded into slidably cam frame 5 is interior and supported, and two arrangement of mirrors heads 32 are kept by central opening portion.The guiding protuberance 9f of three groups of zoom frames 9 is embedded in the guiding groove 8b of the peripheral part that is located at two groups of zoom frames 8 slidably, and the cam follower 8c that is located at the peripheral part of two groups of zoom frames 8 is embedded into the cam path 5b interior (Fig. 9) of cam frame 5 slidably.Therefore, two groups of zoom frames 8 are at three groups of zoom frames 9 via the guiding of being kept straight on and under the state of restricting rotation, follow the rotation of cam frame 5 driving of being advanced and retreat.
Be provided with at the rear of two groups of zoom frames 8 along the upright overshooting shape cam part of optical axis O direction and keep out of the way cam 8d and exit the 8g of portion with the opposed rotation axis of front end of rotation axis.Keep out of the way the equipping position of cam 8d as shown in Figure 10, Figure 11, be positioned at centered by rotation axis exits the 8g of portion from two arrangement of mirrors Tou32 centers (O is consistent with optical axis) to counterclockwise inclination oblique the direction of predetermined angular.Above-mentioned predetermined angular is to obtain the angle of keeping out of the way camera lens frame 12 needed rotational angles.Be provided with inclined cam surface 8da and the parallel sliding face 8db parallel with optical axis O direction at this overshooting shape fore-end of keeping out of the way cam 8d.
As shown in Figure 12 and Figure 13, three groups of zoom frames 9 are cylinder-like parts, in front face side, cover blade shape parts are installed, and keep out of the way camera lens frame 12 and are supported on rotationally cylinder interior.And, dispose at the rear of keeping out of the way camera lens frame 12 by shutter unit 11 (Fig. 2, Fig. 3) spring energized, that can move with respect to optical axis O direction advance and retreat.
Cylindrical portion periphery at three groups of zoom frames 9 is provided with cam follower 9b, is provided with guiding protuberance 9f in interior perimembranous, and discoideus portion periphery is provided with guiding protuberance 9a in the wings.And, be provided with the axle supported hole 9d at the two ends of support rotating axle 25 in cylinder interior.And, be provided with the 9g of central opening portion of the camera lens maintaining part that can insert two groups of zoom frames 8 at cylinder front end face, side is provided with upright keeping out of the way camera lens frame backstop 9c and keep out of the way cam inserting hole 9e in the wings.Keeping out of the way the rotation axis 25 that camera lens frame 12 is embedded in axle supported hole 9d supports rotationally.
The guiding protuberance 9a of three groups of zoom frames 9 is embedded into the craspedodrome groove 4b interior (Fig. 4, Fig. 6) of movable frame 4 slidably, and cam follower 9b is embedded into the cam path 5c interior (Fig. 9) of cam frame 5 slidably.Therefore, three groups of zoom frames 9 are followed the rotation of cam frame 5 and are driven by advance and retreat under the state that is moved frame 4 restricting rotations.
As shown in figure 14, keep out of the way the parts that camera lens frame 12 is lever shapes, one end be provided with axis hole 12a that rotation axis 25 embeds rotationally and outstanding be arranged near this axis hole from untie-sell 12b, the other end is provided with backstop abutting part 12c and driven butt face 12d, and what have optical axis O1 keeps out of the way camera lens 33 by keeping from axis hole 12a peristome spaced apart by a predetermined distance.This keeps out of the way torsion spring 26 that camera lens frame 12 the is used as force application part application of force clockwise on Figure 12.
Do not act in photography state, external force under the state of keeping out of the way camera lens frame 12 at Zoom lens barrel 1, keep out of the way camera lens frame 12 clockwise rotates centered by rotation axis 25, the backstop 9c butt of backstop abutting part 12c and three groups of zoom frames 9, keeps out of the way camera lens 33 in light path of photography., keep out of the way camera lens frame 12 and be positioned at the optical axis O1 in-position P1 (Fig. 6) consistent with phtographic lens optical axis O that keeps out of the way camera lens 33.
In the time that Zoom lens barrel 1 is switched to contraction state from photography state, keep out of the way camera lens frame 12 and follow the rotation of cam frame 5, first, pressed from untie-sell 12b by cam path 5d, rotate predetermined angular towards keeping out of the way direction.Afterwards, keep out of the way camera lens frame 12 due to three groups of zoom frames 9 and two groups of zoom frames 8 relative approaching and press driven butt face 12d by the cam 8d that keeps out of the way of two groups of zoom frames 8 in optical axis O direction, keep out of the way camera lens 33 and be rotated and be driven into the retreating position P2 (Fig. 4) keeping out of the way from light path of photography.In the time being switched to photography state from contraction state, carry out and the rightabout action of above-mentioned action, keep out of the way camera lens frame 12 and be rotated and be driven into in-position P1 from retreating position.In addition, about the above-mentioned rotation action of camera lens frame 12 from in-position P1 to retreating position P2 of keeping out of the way, after be elaborated.
Four groups of focusing frames 13 can be advanced and retreat and be supported movably along optical axis O direction via leading axle, in the time of focusing, are driven into focusing position by above-mentioned focusing unit advance and retreat.
After sensor unit back up pad 16 has been assembled each picture frame parts such as rotating frame 3 under the state that is assembled with sensor unit 15, under the state movable along XY direction, be arranged on the back part of fixed frame 2.
About the advance and retreat action with the each picture frame parts in the Zoom lens barrel 1 of said structure, use Fig. 9 to wait and describe.In addition, below explanation be the look in the distance state of the initial Zoom lens barrel 1 of explanation hypothesis in photography state, pass through afterwards photography state wide-angle state (Fig. 6), arrive the retract action that non-photography state is contraction state (Fig. 4), but in the time of stretching out from contraction state to photography state, carry out the opposite action of above-mentioned retract action.
When Zoom lens barrel 1 is in the time looking in the distance state, with respect to cam path 5a, 5b, the 5c of cam frame 5, the cam follower (not shown) of one group of zoom frame 7 is positioned at the correspondence position of looking in the distance, cam follower 8c, the 9b of two groups of zoom frames 8, three groups of zoom frames 9 also lay respectively at look in the distance correspondence position 8cT, 8bT (Fig. 9), and frame separately reaches the position of looking in the distance.Due to from untie-sell 12b in non-fastening state, so acting force and the backstop 9c butt of the keeping out of the way camera lens frame 12 and utilize torsion spring 26 that are supported by three groups of zoom frames 9 are kept out of the way camera lens 33 and be located at the in-position P1 (Fig. 6) in light path of photography.
In the time being switched to wide-angle state from the above-mentioned state of looking in the distance, cam frame 5 is rotated counterclockwise driving by zoom motor 41 together with rotating frame 3, with respect to cam path 5a, 5b, the 5c of cam frame 5, the cam follower (not shown) of one group of zoom frame 7 moves to wide-angle correspondence position, and, cam follower 8c, the 9b of two groups of zoom frames 8, three groups of zoom frames 9 also move to respectively wide-angle correspondence position 8cW, 9bW (Fig. 9), and frame separately moves to wide-angle position.Keep out of the way camera lens frame 12 and remain on same as before in-position P1 (Fig. 6).
Next, in the time being retracted into contraction state from wide-angle state, cam frame 5 is also rotated counterclockwise driving together with rotating frame 3, and rotating frame 3 is retracted back into punctured position.With respect to cam path 5a, 5b, the 5c of cam frame 5, the cam follower (not shown) of one group of zoom frame 7 moves to contraction correspondence position, and, cam follower 8c, the 9b of two groups of zoom frames 8, three groups of zoom frames 9 also move to respectively wide-angle correspondence position 8cC, 9bC (Fig. 9), and frame is separately retracted into punctured position (Fig. 2).During the switching action from above-mentioned wide-angle state to contraction state, keep out of the way camera lens frame 12 by the cam path 5d rotating drive of cam frame 5, next, kept out of the way cam 8d rotating drive by the overshooting shape of two groups of zoom frames 8, as mentioned above, move to retreating position P2 (Fig. 6) from in-position P1.
Under the contraction state of Zoom lens barrel 1, as shown in Figure 2, rotating frame 3, movable frame 4, craspedodrome lead-frame 6, cam frame 5 are incorporated in fixed frame 2 inside under coincidence status, and one group of zoom frame 7, two groups of zoom frames 8, three groups of zoom frames 9 and four groups of focusing frames 13 are contained under the minimum state in the gap of optical axis O direction.On the other hand, keeping out of the way camera lens frame 12 turns to and keeps out of the way the retreating position P2 that camera lens 33 is kept out of the way from light path of photography, by three arrangement of mirrors heads 33 and four arrangement of mirrors heads 34 are approached as much as possible, can further shorten the total length of the optical axis O direction of Zoom lens barrel 1 under contraction state.
Here use the action of keeping out of the way of keeping out of the way camera lens frame 12 of three groups of zoom frames 9 of detailed description such as Figure 15, Figure 16.
The switching action initial stage at Zoom lens barrel 1 from from wide-angle state to contraction state, when make cam frame 5 with three groups of relative approaching of zoom frame 9 by being rotated counterclockwise of cam frame 5, in wide-angle correspondence position 12bW (Figure 15) keep out of the way camera lens frame 12 from untie-sell 12b and the jut 5dd butt of cam path peristome that is located at cam frame 5, enter into afterwards in cam path 5d and engage with craspedodrome cam slot part 5da.
Then in the time that cam frame 5 rotates, be pressed against in craspedodrome cam slot part 5da on one side from untie-sell 12b, move to relatively move position 12b1,12b2,12b3 (Figure 15) along this cam slot part wall on one side.By this movement of pressing from untie-sell 12b, keep out of the way camera lens frame 12 overcome torsion spring 26 directed force F 0 (Figure 16) and counterclockwise (on Fig. 6) rotate, backstop abutting part 12c leaves backstop 9c, starts to move to retreating position P2 from in-position P1 (Fig. 6).Driven butt face 12d also moves counterclockwise from wide-angle correspondence position 12dW (Figure 16).
Next, in the time that cam frame 5 rotates, state from untie-sell 12b in engaging with tilting cam slot part 5db, is pressed on one side and moves to the position 12b4 (Figure 15) that relatively moves by the wall of this cam part on one side, proceeds to keep out of the way rotating counterclockwise of camera lens frame 12.
In the above-mentioned spinning movement of cam frame 5, the cam follower 8c of two groups of zoom frames 8 and the cam follower 9b of three groups of zoom frames 9 are respectively between shift position 8c3, the 9b3 on cam path 5b, the 5c of cam frame 5 and shift position 8c6,9b6 (Figure 15), and two groups of zoom frames 8 and three groups of zoom frames 9 are close to each other.Therefore, two groups of zoom frames 8 keep out of the way that cam 8d inserts the keeping out of the way cam inserting hole 9e of three groups of zoom frames 9 and the inside that enters into three groups of zoom frames 9.Therefore, the driven butt face 12d that keeps out of the way camera lens frame 12 in clockwise rotating approaches and keeps out of the way cam 8d, and with the inclined cam surface 8da butt of keeping out of the way cam 8d.Afterwards, keep out of the way camera lens frame 12 from by before the cam path 5d of cam frame 5 via the rotating drive state transitions from untie-sell 12b to by keeping out of the way the rotating drive state of cam 8d via driven butt face 12d.
Then in the time that the rotation of cam frame 5 is carried out, two groups of zoom frames 8 and three groups of zoom frames 9 relatively further approach, driven butt face 12d is tilted cam surface 8da and presses and arrive the position 12d5 (Figure 16) that relatively moves, and keeps out of the way camera lens frame 12 and proceeds further to rotate counterclockwise.Move to the position 12b5 (Figure 15) that relatively moves leaving from the wall of tilting cam slot part 5db by above-mentioned push action from untie-sell 12b.
And when two groups of zoom frames 8 are during with three groups of relative approaching of zoom frame 9, driven butt face 12d moves to relatively move position 12d6, the 12d7 (Figure 16) on the parallel sliding face 8db that keeps out of the way cam 8d, keeps out of the way camera lens frame 12 and arrives retreating position P2 and remain on this position (Fig. 4).Now, rotating frame 3 other picture frames such as grade are also retracted back into punctured position, and the contractive action of Zoom lens barrel 1 finishes.In addition, from exiting with relatively move position 12b6,12b7 cam slot part 5dc, wide-angle correspondence position 12bC, remain on non-fastening state (Figure 15) from untie-sell 12b.
The rotation action of keeping out of the way camera lens frame 12 the switching action of Zoom lens barrel 1 from from contraction state to wide-angle state is carried out the reciprocal action with above-mentioned action, is rotated and is driven into in-position (Fig. 6) from retreating position P2 (Fig. 4).
In above-mentioned Zoom lens barrel 1, be supported on rotationally and keep out of the way the first half of keeping out of the way driving of camera lens frame 12 from in-position P1 to retreating position P2 in three groups of zoom frames 9 by the driving This move of the cam path 5d with cam frame 5, carry out latter half with the driving This move of keeping out of the way cam 8d being located in two groups of frames 8, can obtain sufficient rotational angle, can make to keep out of the way camera lens frame 12 and be positioned at the retreating position of more expecting.Then, owing to driving above-mentioned latter half by the cam 8d that keeps out of the way that leaves rotation axis 25, thereby the positional precision of retreating position P2 can be improved, without more obtaining the kept out of the way gap around camera lens frame 12 of keeping out of the way, the physical dimension of each picture frame can be further reduced.
And, as mentioned above by keeping out of the way driving with 2 actions, the cam path 5d of the configurable interior perimembranous that is located at cam frame 5 and can not invade the region of other cam path 5b, 5c, and, also can not excessively carry out cam path 5d to keeping out of the way the driving from untie-sell 12 of camera lens frame 12.
And, unlike lens barrel A1 in the past, be located on the back side side plate of fixed frame A2 keeping out of the way cam A14, but keep out of the way cam 8d by configuration on two groups of frames 8, and can under the part assembled state of each picture frame, confirm to keep out of the way the action of keeping out of the way of camera lens frame 12, assembling inspection etc. becomes easy.Then,, in the case of being the lens barrel with image shake correction function as in the present embodiment, keep out of the way cam the configuration of jitter correction camera element unit is not restricted.
In addition, the present invention is not limited to the respective embodiments described above, in addition can implementation phase in the scope that does not depart from purport of the present invention, implement various distortion.And, include in the respective embodiments described above the invention in various stages, by by appropriately combined disclosed multiple inscapes, can extract various inventions.
Zoom lens barrel of the present invention is to have the Zoom lens barrel of keeping out of the way camera lens frame of keeping out of the way under non-photography state, wherein, keep out of the way keeping out of the way mechanism and can not driving the configuration of cam path and the configuration of image unit of use cause restriction to picture frame advance and retreat of camera lens frame, can be as Zoom lens barrel that also can miniaturization.
Claims (2)
1. a Zoom lens barrel, its have under non-photography state, keep out of the way keep out of the way camera lens frame, it is characterized in that, described Zoom lens barrel has:
Fixed frame;
The zoom drive source that zoom is used;
Have the first frame of cam slot part, it is at least rotarilyd actuate with respect to above-mentioned fixed frame by above-mentioned zoom drive source;
Have the second frame of cam part, it is driven by above-mentioned the first frame advance and retreat;
The 3rd frame, it is driven by above-mentioned the first frame advance and retreat; And
The above-mentioned camera lens frame of keeping out of the way, it is the frame being supported on rotationally on above-mentioned the 3rd frame, keep keeping out of the way camera lens, when in photography state, be in the above-mentioned camera lens of keeping out of the way and be positioned at the in-position in light path, during the switching action from above-mentioned photography state to above-mentioned non-photography state, above-mentioned the first frame is driven by above-mentioned zoom drive source, above-mentionedly keep out of the way camera lens frame by the above-mentioned cam slot part of above-mentioned the first frame and be located at the above-mentioned cam part rotating drive on above-mentioned the second frame, being kept out of the way being driven into the above-mentioned retreating position of lens retreat outside light path of keeping out of the way.
2. Zoom lens barrel according to claim 1, is characterized in that,
The above-mentioned first half of camera lens frame during the above-mentioned switching action from above-mentioned photography state to above-mentioned non-photography state of keeping out of the way, upwards stated retreating position direction rotating drive by the cam slot part of above-mentioned the first frame, at latter half, be arranged on the above-mentioned cam part rotating drive on above-mentioned the second frame, make to be positioned at above-mentioned retreating position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-196917 | 2010-09-02 | ||
| JP2010196917A JP5592732B2 (en) | 2010-09-02 | 2010-09-02 | Zoom lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102385134A CN102385134A (en) | 2012-03-21 |
| CN102385134B true CN102385134B (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110256637.3A Expired - Fee Related CN102385134B (en) | 2010-09-02 | 2011-09-01 | Zoom lens barrel |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5592732B2 (en) |
| CN (1) | CN102385134B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6272047B2 (en) * | 2014-01-23 | 2018-01-31 | キヤノン株式会社 | Optical equipment |
| CN107111094B (en) * | 2014-12-26 | 2018-07-10 | 富士胶片株式会社 | Lens barrel and its control method, camera main-body and its control method and camera and its control method |
| CN112433335A (en) * | 2020-11-30 | 2021-03-02 | 中山联合光电研究院有限公司 | Zoom lens |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4632819B2 (en) * | 2005-03-09 | 2011-02-16 | 株式会社リコー | Lens barrel, camera, portable information terminal, and image input device |
| JP4969863B2 (en) * | 2006-02-08 | 2012-07-04 | Ｈｏｙａ株式会社 | Lens barrel |
| JP2010026164A (en) * | 2008-07-17 | 2010-02-04 | Nikon Corp | Lens barrel, and optical equipment |
| JP5266948B2 (en) * | 2008-08-08 | 2013-08-21 | 株式会社タムロン | Inner focus zoom lens barrel |
| JP2010085678A (en) * | 2008-09-30 | 2010-04-15 | Olympus Imaging Corp | Lens barrel |
| JP2011099979A (en) * | 2009-11-05 | 2011-05-19 | Olympus Imaging Corp | Zoom lens barrel |
-
2010
- 2010-09-02 JP JP2010196917A patent/JP5592732B2/en not_active Expired - Fee Related
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2011
- 2011-09-01 CN CN201110256637.3A patent/CN102385134B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102385134A (en) | 2012-03-21 |
| JP2012053351A (en) | 2012-03-15 |
| JP5592732B2 (en) | 2014-09-17 |
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