WO2008056766A1 - Dispositif d'entraînement de lentille - Google Patents
Dispositif d'entraînement de lentille Download PDFInfo
- Publication number
- WO2008056766A1 WO2008056766A1 PCT/JP2007/071784 JP2007071784W WO2008056766A1 WO 2008056766 A1 WO2008056766 A1 WO 2008056766A1 JP 2007071784 W JP2007071784 W JP 2007071784W WO 2008056766 A1 WO2008056766 A1 WO 2008056766A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- guide shaft
- lens frame
- optical axis
- axis direction
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
Definitions
- the present invention relates to a lens driving device that drives a lens frame holding a lens in an optical axis direction by a screwed structure of a lead screw and a nut.
- the conventional lens driving device guides the lens frame in the optical axis direction on both sides of the base, the lens frame holding the lens, and both sides of the lens.
- 2 guide shafts fixed to the base, a motor fixed to the base, a lead screw that is directly connected to the motor and driven to rotate, a nut that is held by the lens frame and screwed into the lead screw, and the lens frame is a nut
- It has a coil spring that urges toward
- the lens frame is moved in the optical axis direction by rotating the lead screw by a motor and screwing the nut.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-249683
- Patent Document 2 Japanese Patent Laid-Open No. 2006-114117
- the lens frame is formed in a substantially annular shape and holds the lens in the center thereof, and the two guide shafts are formed so as to guide the lens frame in the optical axis direction with the lens interposed therebetween.
- the positional deviation or shake of the lens frame is not so much a problem, and desired optical performance can be ensured.
- the lens frame is formed to be elongated so as to extend in one direction, one side of which is movably supported by two guide shafts, and the lens is held on the other side.
- the lens frame is formed in a cantilever shape that holds the lens on the free end side (the other side described above) that is separated from the two guide shafts and biased. For this reason, the lens weight force is offset from the two guide shafts. It will act as a biased load at the wrinkled position.
- the present invention has been made in view of the above circumstances, and its object is to form a lens frame in a cantilever shape while simplifying the structure and reducing the size of the apparatus. Even if the lens is held on the free end side, the lens frame (lens) that does not cause rattling, tilt, stick, vibration, etc. can be driven smoothly and stably in the optical axis direction.
- An object of the present invention is to provide a lens driving device capable of driving a lens frame (lens) with high accuracy in the optical axis direction by assembling the device with high accuracy.
- the lens driving device of the present invention includes a base, a lens frame that holds the lens, a driving source fixed to the base, a lead screw that is rotationally driven by the driving source, and screwed into the lead screw and cannot rotate.
- a nut that is held so as to move together with the lens frame, a main guide shaft that has one end fixed to the base to guide the lens frame in the optical axis direction, and restricts rotation of the lens frame around the main guide axis.
- one end of the sub guide shaft is fixed to the base, and the other end of the main guide shaft and the other end of the sub guide shaft are fitted to each other.
- the lens frame includes a lens holding portion that holds a lens on a free end protruding from an outer contour defined by the base and the cover.
- One of the screw and the cover is provided at the position closer to the main guide shaft than the first positioning pin, and the first positioning pin provided in the vicinity of the main guide shaft for mutual positioning when assembled.
- the other of the base and the cover has a first positioning hole for fitting the first positioning pin and a second positioning hole for fitting the second positioning pin.
- the base and the cover are each provided with a first positioning pin and a first positioning hole that serve as a positioning reference in the vicinity of the main guide shaft, and a manufacturing error or the like is provided at a position away from the main guide shaft.
- a second locating pin and a second locating hole are provided to absorb and absorb the incidental positioning.
- a lens that is not affected by the biasing load exerted by the lens can be moved with high accuracy in the optical axis direction, and a lens driving device with high optical performance can be obtained.
- the lens since the lens is arranged outside the base and the cover, the degree of freedom in design can be increased while improving the optical performance.
- the sub guide shaft can be positioned with higher accuracy, and the lens can be moved in the optical axis direction with higher accuracy.
- the lens frame includes a fitting portion that slidably engages the main guide shaft, an engaging portion that slidably engages the sub guide shaft, and a direction that intersects the optical axis direction.
- the force S is used to adopt the configuration including the lens holding portion formed on the opposite side of the engaging portion so as to sandwich the fitting portion.
- the lens frame can be moved smoothly.
- the lens holding portion is formed so as to position the center of the lens on or near a straight line connecting the center of the fitting portion and the center of the engaging portion within a plane intersecting the optical axis direction.
- the configuration can be adopted.
- the lens holding portion (relay) is located on or near the straight line connecting the fitting portion and the engaging portion.
- the fitting portion is formed to have a length force along the main guide shaft that is longer than the distance from the center of the main guide shaft to the center of the lens held by the lens holding portion.
- the configuration can be adopted.
- the fitting portion can slide more smoothly with respect to the outer peripheral surface of the main guide shaft without causing stick (pulling force, scale) or chatter vibration.
- the lens frame can be moved smoothly and with high accuracy, and optical performance can be improved.
- the lead screw may be configured to be disposed between the main guide shaft and the sub guide shaft.
- the driving force S of the lead screw is exerted between the main guide shaft and the sub guide shaft. For this reason, this driving force can be prevented from affecting the posture of the lens frame. As a result, the lens frame can be moved smoothly.
- the lead screw is arranged so that the center of the lead screw is positioned on or near a straight line connecting the center of the fitting portion and the center of the engaging portion in a plane intersecting the optical axis direction.
- the configuration can be adopted.
- the center of the lead screw is positioned on or near the straight line connecting the fitting portion and the engaging portion. For this reason, the driving force of the lead screw acts on the main guide shaft (and the fitting portion) or the sub guide shaft (and the engaging portion) as a bias load (bending moment) in the direction intersecting this straight line. Can be prevented. As a result, the force S moves the lens frame more smoothly.
- the lead screw is directly connected to the drive source.
- the center of gravity of the device can be reduced with the main guide shaft and the auxiliary shaft while achieving downsizing of the device. It can be positioned or brought close between the guide shafts. In addition, the weight balance of the device can be set optimally even though the lens frame is cantilevered.
- the lens frame is formed in a cantilever shape and the lens is held on the free end side while achieving simplification of the structure, size reduction of the device, and the like. Even so, it is possible to obtain a lens driving device that can smoothly and stably drive a lens frame (lens) that does not cause rattling, tilting, sticking, vibration, or the like in the optical axis direction.
- FIG. 1 is an exploded perspective view showing an embodiment of a lens driving device according to the present invention.
- FIG. 2 is a side view of the lens driving device shown in FIG.
- FIG. 3 is a front view of the lens driving device shown in FIG.
- FIG. 4 is a perspective view showing a base that forms part of the lens driving device shown in FIG. 1.
- FIG. 4 is a perspective view showing a base that forms part of the lens driving device shown in FIG. 1.
- FIG. 5 is an end view of the base shown in FIG.
- FIG. 6 is a perspective view showing a cover that forms part of the lens driving device shown in FIG. 1.
- FIG. 7 is an end view of the cover shown in FIG.
- FIG. 8 is a front view showing an arrangement relationship in the lens driving device shown in FIG.
- FIG. 9 is a side view showing a lens frame that forms part of the lens driving device shown in FIG. 1.
- FIG. 10 is a longitudinal sectional view showing the inside of the lens driving device shown in FIG. 1.
- FIG. 11 is a longitudinal sectional view showing the inside of the lens driving device shown in FIG. 1.
- FIG. 12 is a longitudinal sectional view showing the inside of the lens driving device shown in FIG. 1.
- L optical axis direction, G ... lens, 10 ... base, 11 ... side wall, 12 ... end face, 12a ... first positioning hole, 12b ... second positioning hole, 13 ⁇ Screw hole, 14 ⁇ Bottom, 15a, 15b ... Mating hole, 16 ... Mounting portion, 17 ... Slit, 20 ... Kano Kuichi, 21 ... End face, 22 ... Extending portion, 22a ... Guide Groove, 23a ... First positioning pin, 23b ... Second positioning pin, 24a, 24b ... Fitting hole, 25 ... Notch, 26, 27 ... Recess, 31 ... Main guide shaft, 32 ... ⁇ IJ guide shaft 31a, 32a ...
- FIG. 1 is an exploded perspective view of the device
- FIG. 2 is a side view of the device
- FIG. 3 is a front view of the device
- FIG. 4 and 5 are a perspective view and an end view of a base forming a part of the apparatus
- FIGS. 6 and 7 are a perspective view and an end view of a force bar forming a part of the apparatus
- FIG. 8 is a front view showing an arrangement relation of the apparatus.
- Fig. 9 is a side view of a lens frame forming a part of the apparatus
- Figs. 10 to 12 are longitudinal sectional views of the apparatus. The cross-sectional directions in FIGS. 10 to 12 are shown in FIGS. 1 and 8.
- the apparatus includes a base 10, a cover 20 that is coupled to face the base 10, a main guide shaft 31 that is fixed to the base 10 and extends in the optical axis direction L, and a sub guide shaft 32.
- the lens frame 40 that holds the lens G and is supported by the main guide shaft 31 and the sub guide shaft 32 so as to be movable in the optical axis direction L, and is directly connected to the motor 50 and the motor 50 as a drive source fixed to the base 10
- the lead screw 60 extending in the optical axis direction L, the nut 70 that is screwed to the lead screw 60 and abutted against the lens frame 40, and the coil spring 80 that biases the lens frame 40 toward the nut 70,
- a detection sensor 90 for detecting the initial position of the lens frame 40, a wiring board 100 attached to the motor 50, and the like are provided.
- the base 10 is molded of a resin material, and as shown in FIGS. 1, 4 and 5, extends in the optical axis direction L and defines a pair of side walls 11 defining an internal space.
- the cover 20 side is described as “front” or “front in the optical axis direction L”, and the base 10 side. Is described as “rear” or “rear in the optical axis direction L”.
- the first positioning hole 12a formed in a circle serves as a positioning reference when the base 10 and the cover 20 are assembled by fitting a first positioning pin 23a of the cover 20 described later. It is. Further, the second positioning hole 12b formed in the long hole absorbs a manufacturing error or the like when the base 10 and the cover 20 are assembled by fitting a second positioning pin 23b of the cover 20 described later. Thus, positioning is performed incidentally.
- the cover 20 is molded of a resin material, and spreads in a direction substantially perpendicular to the optical axis direction L to cover the internal space defined by the base 10, as shown in FIGS. Thus, it is formed in a substantially flat plate shape.
- the cover 20 extends from the end surface portion 21 joined to the end surface portion 12 of the base 10 in the optical axis direction L and is fitted into a slit 17 formed on the side wall portion 11 of the base 10.
- the first positioning hole of the base 10 that protrudes in the optical axis direction L from the end face 21 and the guide groove 22a that guides the projection 72 of the nut 70, which will be described later, is formed so as to extend in the optical axis direction L in the portion 22 and the extension portion 22.
- the first positioning pin 23a formed in a columnar shape is a reference for positioning when the base 10 and the cover 20 are assembled by being fitted into the first positioning hole 12a of the base 10. is there. Also, the second positioning pin 23b formed in a cylindrical shape is fitted into the second positioning hole 12b of the base 10 to absorb manufacturing errors and the like when the base 10 and the cover 20 are assembled. Thus, positioning is performed incidentally.
- the main guide shaft 31 is formed by a metal material having a circular cross section so as to extend in the optical axis direction L. One end 31a of the main guide shaft 31 is press-fitted and fixed in the fitting hole 15a of the base 10, and the other end 31b is fitted in the fitting hole 24a of the cover 20.
- the main guide shaft 31 is slidably fitted into a fitting portion 41 of the lens frame 40 described later, and guides the lens frame 40 in the optical axis direction L.
- the sub guide shaft 32 is formed of a metal material having a circular cross section so as to extend in the optical axis direction L.
- One end 32 a of the sub guide shaft 32 is press-fitted into the fitting hole 15 b of the base 10 and fixed, and the other end 32 b is fitted into the fitting hole 24 b of the cover 20.
- the ij guide shaft 32 is slidably engaged with an engaging portion 44 of a lens frame 40 described later, and the lens frame 40 is restricted from rotating around the main guide shaft 31, while the lens is restricted. Guide the frame 40 in the optical axis direction L.
- FIG. 8 shows a pair of the first positioning pin 23a and the first positioning hole 12a, a pair of the second positioning pin 23b and the second positioning hole 12b, the main guide shaft 31 and the sub guide shaft 32. The positional relationship between them is shown.
- a first positioning pin 23a and a first positioning hole 12a serving as a positioning reference are provided in the vicinity of the main guide shaft 31 .
- a second positioning pin 23b and a second positioning hole 12b are provided in the position apart from the main guide shaft 31 and in the vicinity of the sub guide shaft 32 to absorb manufacturing errors and the like and perform positioning accordingly.
- the distance D3 corresponding to the distance from the main guide shaft 31 to the first positioning pin 23a (first positioning hole 12a) is the second positioning pin 23b (second It is arranged to be smaller than the distance D4 corresponding to the distance to the positioning hole 12b).
- the main guide shaft 31 and the sub guide shaft 32 can be prevented from tilting and can be extended parallel to the optical axis direction L.
- the device can be assembled with high accuracy. Therefore, it is possible to move the lens frame 40 (lens G), which will be described later, without being affected by the bias load exerted by the lens G with high precision S, and to obtain a lens driving device with high optical performance. Can do.
- the second positioning pin 23b and the second positioning hole 12b are arranged in the vicinity of the sub guide shaft 32. Is placed. Therefore, when the base 10 and the cover 20 are assembled, the positioning of the sub guide shaft 32 can be performed with higher accuracy, and the lens frame 40 (lens G), which will be described later, can be positioned with higher accuracy in the optical axis direction L. Can be moved.
- the lens frame 40 is formed of a resin material. As shown in FIGS. 1 to 3, 8, and 9, the fitting portion 41, the seat surface portion 41b, the lens holding portion 42, and the nut holding portion. 43, an engaging portion 44, a detected piece 45, and the like.
- the fitting portion 41 is formed so as to extend in the optical axis direction L, and defines a fitting hole 41a into which the main guide shaft 31 is slidably fitted.
- the seat surface portion 41 b is formed at the lower end of the fitting portion 41 and receives the other end portion of the coil spring 80.
- the annular lens holding portion 42 extends from the fitting portion 41 in one direction in the radial direction (the direction perpendicular to the optical axis direction L), and holds the lens G on its free end side.
- the nut holding portion 43 extends in a different direction from the direction in which the lens holding portion 42 extends from the fitting portion 41, and a flat surface 43b that abuts an end surface 71 of a nut 70 described later, and a lead screw 60. It has a through-hole 43a that allows to pass through without contact.
- the substantially U-shaped engaging portion 44 is formed adjacent to the nut holding portion 43 and slidably engages the sub guide shaft 32.
- the detected piece 45 is formed so as to extend from the engaging portion 44 and extend in a direction perpendicular to the optical axis direction L and is detected by the detection sensor 90.
- the fitting portion 41 is guided in the optical axis direction L by the main guide shaft 31, and the engaging portion 44 is guided in the optical axis direction L while being restricted in rotation by the sub guide shaft 32.
- the lens holding portion 42 on the free end side protruding from the outer contour defined by the base 10 and the cover 20 is formed in a cantilever shape holding the lens G.
- the lens frame 40 has an outer periphery of the nut 70 and the nut holding portion 4 in a state in which an end surface 71 of a nut 70 to be described later screwed into the lead screw 60 is in contact with the flat surface 43b of the nut holding portion 43.
- the nut 70 is piled on the urging force of the coil spring 80 and is held so as to be detachable in the optical axis direction L while maintaining the non-contact state with the end face 43c of 3.
- the lens frame 40 is formed so that the lens G is disposed outside the base 10 and the cover 20, the degree of freedom in design can be increased while improving optical performance. And force S.
- the direction perpendicular to the optical axis direction L (for example, Naozumi S
- the engaging portion 44 and the lens holding portion 42 are arranged so as to face each other with the fitting portion 41 interposed therebetween. That is, since the fitting part 41 guided by the main guide shaft 31 is arranged on the side close to the lens G, the lens frame 40 holds the lens G on its free end side (lens holding part 42) and Even if it is formed like a cantilever beam, the sliding resistance exerted on the fitting part 41 (fitting hole 41a) by the bias load (bending moment) of the lens G can be minimized. As a result, the lens frame 40 can move smoothly in the optical axis direction L.
- the lens holding portion 42 is formed so that the center L of the lens G is positioned on or near the straight line S.
- a straight line S in FIG. 8 is defined by the center C1 of the fitting portion 41 (main guide shaft 31) and the center C2 of the engagement portion 44 (sub guide shaft 32) in a plane (paper surface) perpendicular to the optical axis direction L. It is a connecting line.
- the symbol L indicates the center of the lens G and also indicates the optical axis direction.
- the lens frame 40 has a length D1 along the main guide shaft 31 of the fitting portion 41.
- the fitting part 41 can slide more smoothly without causing sticking (chucking) or chatter vibration to the outer peripheral surface of the main guide shaft 31.
- the lens frame 40 can move smoothly and with high accuracy, and high optical performance can be obtained.
- the motor 50 includes a stepping motor that can rotate step by step at a predetermined angle, and is fixed to the bottom 14 of the base 10 with screws B as shown in FIGS.
- the motor 50 exerts a rotational driving force on the directly connected lead screw 60.
- the motor 50 can be configured to further include a case 51, a rear flange 52, and a front flange 53.
- the rear flange 52 and the front flange 53 are made of, for example, a thin metal plate
- the rear flange 52 and the front flange 53 in this case can serve as a heat radiating plate that releases heat generated by the stepping motor inside the motor 50.
- the lead screw 60 made of a metal material is formed so as to extend in the optical axis direction L, as shown in FIGS. Further, one end of the lead screw 60 is directly connected to the motor 50, and the other end is formed so as to enter the recess 26 of the cover 20 in a non-contact manner.
- the lead screw 60 is disposed between the main guide shaft 31 and the sub guide shaft 32 in a plane (paper surface) perpendicular to the optical axis direction L.
- the driving force of the lead star 60 is exerted on the lens frame 40 while being sandwiched between the main guide shaft 31 and the sub guide shaft 32. Therefore, this driving force can be prevented from affecting the posture of the lens frame 40, and the lens frame 40 can be smoothly moved in the optical axis direction L.
- the lead screw 60 is disposed such that its center C3 is located on or near the straight spring S.
- the straight line S is a line connecting the center C1 of the fitting portion 41 (main guide shaft 31) and the center C2 of the engaging portion 44 (sub guide shaft 32).
- the lead screw 60 is directly connected to the motor 50, so that the size of the apparatus can be reduced.
- the center of gravity of the device can be positioned or brought close to between the main guide shaft 31 and the sub guide shaft 32, the weight balance of the device is optimally set despite the lens frame 40 being cantilevered. can do.
- the nut 70 made of a metal material includes an end face 71, a protrusion 72, and the like.
- the end surface 71 is in the state of being screwed into the lead screw 60 and has a force in the optical axis direction L, and comes into contact with the nut holding portion 43 of the lens frame 40.
- the protrusion 72 protrudes in the radial direction from the outer peripheral surface of the nut 70 and enters the guide groove 22a of the cover 20 to restrict its rotation.
- the protrusion 72 is formed with a width that prevents the nut 70 from rotating around the lead screw 60 and causing backlash.
- the protrusion 72 has a guide groove 22a It is formed so as to be movable in the longitudinal direction (optical axis direction U! /).
- the buffer member 75 is formed in an annular shape using an elastic material such as rubber, and is fitted into the recess 27 of the cover 20 as shown in FIG.
- the buffer member 75 is for preventing the nut 70 from directly colliding with the cover 20 when the nut 70 moves most forward in the direction of the optical axis.
- the coil spring 80 is externally fitted around the main guide shaft 31. Further, the coil spring 80 is attached in a compressed state at a predetermined compression allowance, one end of which is abutted against the seat surface 15 of the base 10 and the other end thereof is the seat surface 41b of the lens frame 40. It is in contact with. Therefore, the coil spring 80 urges the lens frame 40 toward the front in the optical axis direction L, and exerts an urging force that presses the nut holding portion 43 of the lens frame 40 against the nut 70 (end surface 71).
- the detection sensor 90 is a transmissive optical sensor having a light emitting element and a light receiving element, and detects the initial position (home position) of the lens frame 40 based on the presence or absence of the detected piece 45 of the lens frame 40.
- the wiring substrate 100 is a flexible substrate that can be elastically deformed. On the wiring board 100, wiring for passing electric power necessary for driving the motor 50, wiring necessary for detecting the signal of the detection sensor 90, and the like are attached or embedded. This wiring board 100 is electrically connected to the motor 50. Further, the wiring board 100 is fixed to the case 51 of the motor 50 with screws B. For this reason, compared with the case where the wiring substrate 100 and the motor 50 are fixed only by an adhesive or the case where the wiring substrate 100 and the motor 50 are fixed only by solder bonding, the structural strength is increased and the durability is improved.
- the motor 50 to which the lead screw 60 is directly connected and the wiring board 100 is attached is fastened and fixed to the bottom 14 of the base 10 with the screw B. Further, the main guide shaft 31 (one end portion 31a) and the sub guide shaft 32 (one end portion 32a) are press-fitted into the base 10 (the fitting holes 15a, 15b) and fixed. Further, the detection sensor 90 is assembled and fixed to the mounting portion 16 of the base 10. Subsequently, the coil spring 80 is fitted onto the main guide shaft 31 and one end thereof is seated on the seat surface portion 15. Next, the lens frame 40 is brought closer from the front in the optical axis direction L, and the other end portion of the coil spring 80 is compressed by the seat surface portion 41b. At the same time, the main guide shaft 31 is slidably passed through the fitting portion 41, and the sub guide shaft 32 is slidably passed through the engaging portion 44. Further, the lead screw 60 is held in a non-contact manner through the through hole 43a.
- the nut 70 is moved closer to the front in the optical axis direction L, screwed into the lead screw 60, and moved to a predetermined depth (toward the rear in the optical axis direction L).
- the lens frame 40 is once released from the above compression. Then, the lens frame 40 is moved forward in the optical axis direction L by the urging force of the coil spring 80, and the nut holding portion 43 is brought into contact with the end surface 71 of the nut 70.
- the cover 20 is moved closer to the front in the optical axis direction L, and the protrusion 72 of the nut 70 is inserted into the guide groove 22a.
- the other end 31b of the main guide shaft 31 is fitted into the fitting hole 24a, and the other end 32b of the sub guide shaft 32 is fitted into the fitting hole 24b.
- the first positioning pin 23a is fitted into the first positioning hole 12a, and the second positioning pin 23b is fitted into the second positioning hole 12b.
- the leading end of the lead screw 60 enters the recess 26.
- the main guide shaft 31 and the sub guide shaft 32 can be prevented from being tilted and extended in parallel to the optical axis direction L.
- the force S can be assembled with high accuracy, and the lens frame 40 (lens G) is guided to move in the optical axis direction L with high accuracy.
- a lens driving device with high optical performance can be obtained.
- the detection sensor 90 detects the detected piece 45.
- the nut holding portion 43 moves following the nut 70 due to the urging force of the coil spring 80. Therefore, the lens frame 40 moves together with the nut 70 toward the front in the optical axis direction L.
- the number of steps from the start of the motor 50 is counted, the driving amount of the lens frame 40 is appropriately controlled, and the lens frame 40 is positioned at a desired position.
- the lens frame 40 moves together with the nut 70 toward the rear in the optical axis direction L.
- the lens frame 40 can be positioned at a desired position, and the lens frame 40 can be moved further rearward to return to the initial position.
- the lens frame 40 is formed in a cantilever shape and the lens G is held on the free end side thereof while achieving simplification of the structure, size reduction of the device, and the like. Even in the configuration, the lens frame 40 (lens G) that does not cause rattling, tilting, sticking, vibration, or the like can be smoothly and stably driven in the optical axis direction L with high accuracy.
- this lens driving device force S is applied as an aberration correction 'beam expander unit in an optical pickup unit, for example, the optical axis does not fluctuate even if the lens frame 40 is driven. High! Optical performance can be obtained.
- the present invention is applied to a configuration including a force S indicating one lens frame 40 as a lens frame moving in the optical axis direction L, and a plurality of lens frames that are not limited to this. Can be applied. In that case, one guide groove may be shared or provided for each lens frame.
- the lens frame 40 is formed in a cantilever shape and the lens G is held on the free end side while achieving simplification and downsizing of the structure. Even so, the lens frame 40 (lens G) that does not rattle, tilt, stick, vibrate, etc. is positioned with high precision so that it can be driven smoothly and stably in the optical axis direction L. It can be assembled with certainty. Therefore, the lens driving device of the present invention can be applied to an optical pickup unit or the like, and is useful for other lens optical systems.
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Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/514,181 US7974024B2 (en) | 2006-11-10 | 2007-11-09 | Lens driving device |
JP2008543136A JP5047980B2 (ja) | 2006-11-10 | 2007-11-09 | レンズ駆動装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006304844 | 2006-11-10 | ||
JP2006-304844 | 2006-11-10 |
Publications (1)
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WO2008056766A1 true WO2008056766A1 (fr) | 2008-05-15 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/071784 WO2008056766A1 (fr) | 2006-11-10 | 2007-11-09 | Dispositif d'entraînement de lentille |
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US (1) | US7974024B2 (ja) |
JP (1) | JP5047980B2 (ja) |
WO (1) | WO2008056766A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009282243A (ja) * | 2008-05-21 | 2009-12-03 | Nidec Copal Corp | レンズ駆動装置 |
JP2009289320A (ja) * | 2008-05-28 | 2009-12-10 | Nidec Copal Corp | レンズ駆動装置 |
US8218406B2 (en) | 2008-05-21 | 2012-07-10 | Nidec Copal Corporation | Lens driving apparatus |
WO2018079221A1 (ja) * | 2016-10-26 | 2018-05-03 | パナソニックIpマネジメント株式会社 | レンズ鏡筒及び撮像装置 |
CN109708847A (zh) * | 2019-02-15 | 2019-05-03 | 上海厦泰生物科技有限公司 | 一种光学镜片微调装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4918061B2 (ja) * | 2008-04-07 | 2012-04-18 | セイコーインスツル株式会社 | レンズ駆動装置及び電子機器 |
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JP2007226234A (ja) * | 2006-02-20 | 2007-09-06 | Samsung Electro-Mechanics Co Ltd | レンズ移送装置 |
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JP2001281744A (ja) * | 2000-03-30 | 2001-10-10 | Fuji Photo Optical Co Ltd | カメラ |
JP3809826B2 (ja) | 2003-05-19 | 2006-08-16 | ソニー株式会社 | レンズ駆動機構および撮像装置 |
JP2006114117A (ja) | 2004-10-14 | 2006-04-27 | Canon Inc | 光ピックアップ装置 |
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- 2007-11-09 JP JP2008543136A patent/JP5047980B2/ja not_active Expired - Fee Related
- 2007-11-09 US US12/514,181 patent/US7974024B2/en not_active Expired - Fee Related
- 2007-11-09 WO PCT/JP2007/071784 patent/WO2008056766A1/ja active Application Filing
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JPH09197241A (ja) * | 1996-01-16 | 1997-07-31 | Fuji Photo Optical Co Ltd | 可変焦点装置付撮影レンズの駆動機構 |
JPH1083014A (ja) * | 1996-09-06 | 1998-03-31 | Asahi Optical Co Ltd | ズーミング装置 |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009282243A (ja) * | 2008-05-21 | 2009-12-03 | Nidec Copal Corp | レンズ駆動装置 |
US8218406B2 (en) | 2008-05-21 | 2012-07-10 | Nidec Copal Corporation | Lens driving apparatus |
JP2009289320A (ja) * | 2008-05-28 | 2009-12-10 | Nidec Copal Corp | レンズ駆動装置 |
WO2018079221A1 (ja) * | 2016-10-26 | 2018-05-03 | パナソニックIpマネジメント株式会社 | レンズ鏡筒及び撮像装置 |
JP2018072485A (ja) * | 2016-10-26 | 2018-05-10 | パナソニックIpマネジメント株式会社 | レンズ鏡筒及び撮像装置 |
US10782502B2 (en) | 2016-10-26 | 2020-09-22 | Panasonic Intellectual Property Management Co., Ltd. | Lens barrel and image-capturing device |
CN109708847A (zh) * | 2019-02-15 | 2019-05-03 | 上海厦泰生物科技有限公司 | 一种光学镜片微调装置 |
CN109708847B (zh) * | 2019-02-15 | 2024-02-09 | 上海厦泰生物科技有限公司 | 一种光学镜片微调装置 |
Also Published As
Publication number | Publication date |
---|---|
JP5047980B2 (ja) | 2012-10-10 |
US7974024B2 (en) | 2011-07-05 |
JPWO2008056766A1 (ja) | 2010-02-25 |
US20100039717A1 (en) | 2010-02-18 |
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