Abstract: In a mode in which a lens barrel need not be extended, if it is determined that a vibration is larger than a reference value, the lens barrel is driven so as to be retracted to a predetermined position.

Abstract: A lens drive device for use with at least one lens may include a movable body holding a lens, a fixed body movably holding the movable body, and a drive mechanism for driving the movable body in the optical axis direction. The drive mechanism may include a drive coil fixed to the movable body and a plurality of drive magnets which is fixed to the fixed body and magnetized so that magnetic poles are different from each other in the optical axis direction. The fixed body may include an outer peripheral side magnetic member and an end face side magnetic member and an inner peripheral face of the outer peripheral side magnetic member and a side face of the drive magnet are faced each other through a predetermined space. The drive coil is disposed between the drive magnet and the inner peripheral face of the outer peripheral side magnetic member.

Abstract: An optical element positioning apparatus capable of moving an optical element from a storage state to a use state and improving the accuracy of positioning the optical element to a use position on an optical path. A holding member that holds the optical element is guided by guide shafts to be movable between the storage state and the use state. The holding member is provided with guide-supporting and receiving portions through which the guide shafts are slidably inserted. The guide shafts are supported by holding portions. A degree of freedom in positioning the holding member at the use position is provided. Holding-member positioning parts of the guide-supporting and receiving portions are pressed by an urging device against ends of the holding portions, whereby the holding member is positioned and held at the use position.

Abstract: A vibration actuator comprising: an electromechanical conversion element excited by a driving signal; an elastic body to which the conversion element is jointed and on a driving face of which vibration waves are generated by the excitation; and a relative moving element pressure-contacted with the driving face of the elastic body, and which is driven by the vibration waves, and wherein: a joining face of the conversion element which is joined to the elastic body has an electrode portion, and a joining strength improving portion which improves the joining strength between the elastic body and the conversion element; and the electrode portion is formed on at least one of two edge portions of the joining face, through the edge portions, an imaginary straight line pass, the line pass the improving portion and is orthogonal to a relative moving direction of the elastic body and the moving element.

Abstract: The optical apparatus including a motor to move an optical element, a position detector configured to detect a position of the optical element, a controller configured to control drive of the motor by using a position detection signal from the position detector, and a memory configured to store a reference movement amount of the optical element corresponding to a moving speed and a moving time period of the optical element moved by the motor. The controller is configured to acquire a correction value for reducing a difference between (a) an actual movement amount of the optical element obtained by using the position detection signal when the optical element is moved by the motor and (b) the reference movement amount, and then to control the drive of the motor by using the correction value.

Abstract: An imaging apparatus may comprise a lens assembly including one or more lenses, an image sensor to receive light from the lens assembly, and an actuator to adjust a position of the lens assembly. An actuator may be mounted on an image sensor, wherein a surface area of the actuator need not extend substantially beyond a surface area of the image sensor.

Abstract: An image capturing module is provided. The image capturing module includes: a lens assembly supporting at least one lens, moving along an optical axis of light indicating an image of a subject, and comprising guiding protrusions for guiding the moving the optical axis; a module supporting unit comprising guiding holes to which the guiding protrusions are inserted to guide the lens assembly; a lens driving unit comprising a winding vibration type piezoelectric motor and a piezoelectric motor supporting member, wherein the winding vibration type piezoelectric motor is disposed on the module supporting unit and moves the lens assembly along the optical axis and the piezoelectric motor supporting member supports the winding vibration type piezoelectric motor; a pressurizing member interposed between the piezoelectric motor supporting member and the module supporting unit; and a plurality of ball assemblies interposed between the module supporting unit and the lens assembly.

Abstract: A lens barrel has a first lens group, a second lens group, a third lens group, a first support frame for supporting the first lens group, a second support frame for supporting the second lens group, a third support frame for supporting the third lens group, a first drive unit, and a second drive unit. The first lens group has an overall negative refractive power, and includes a prism. The second support frame is driven along a second optical axis by the first drive unit. The third support frame is driven along the second optical axis by the second drive unit. Part of a first movement region in which the second support frame moves overlaps a second movement region in which the third support frame moves.

Abstract: A power transmission capable of regulating the disengagement of a nut part from a screw part, and the like are provided. The power transmission is constructed of a rotation shaft having a thread formed on a periphery thereof; a nut member capable of being opened and closed, the nut member having a thread engaged with the thread of the rotation shaft, and pinching the rotation shaft and moving as the rotation shaft is rotated; a regulating part enabling movement of the nut member by regulating opening of the nut member; and a regulation releasing part capable of releasing engagement between the nut member and the rotation shaft by opening the nut member.

Abstract: A lens drive mechanism includes a drive source; a lead screw that is connected to the drive source and rotated by operation of the drive source; a nut member that screws on the lead screw and moves as the lead screw rotates; a lens hold portion that is so disposed as to move as the nut member moves and hold a lens; a guide member that guides the lens hold portion to move in the same direction as that of movement of the nut member; and a leaf spring member that if the nut member is situated near one end of a thread portion of the lead screw, pressurizes the nut member toward the other end of the thread portion of the lead screw.

Abstract: A lens drive device may include a fixed body, a movable body having a lens, a magnetic drive mechanism for magnetically driving the movable body in a lens optical axis direction, and a spring member which connects the movable body with the fixed body. The fixed body may include a base disposed on an imaging element side, a shield member which is formed in a cover shape and which is provided with a side plate part whose imaging element side end part is abutted with an object side face of the base, and a ground terminal which is a different member from the shield member and connected with the shield member. An imaging element side face of the ground terminal is supported by a ground terminal support part formed on the object side face of the base and a gap space is formed between the object side face of the ground terminal and an end part of the side plate part of the shield member.

Abstract: An exemplary piezoelectric driving module includes a movable barrel, a fixed barrel receiving the movable barrel, a piezoelectric actuator, and a spring member. The piezoelectric actuator is configured for moving the movable barrel relative to the fixed barrel. The piezoelectric actuator includes a piezoelectric body mounted on the sidewall of the fixed barrel and a friction member mounted on the piezoelectric body. The piezoelectric body is configured for driving the friction member to generate elliptical vibration. The friction member is in frictional contact with the movable barrel. The spring member connects the movable barrel to the fixed barrel. The spring member is configured for providing an resilient force to make the movable barrel be in frictional contact with the friction member such that the friction member can be driven by the piezoelectric body to move the movable barrel along the central axis of the fixed barrel.

Abstract: A camera module includes a zoom lens group, a focus lens group, a barrel, an actuator group comprising a first actuator and a second actuator. The first and second actuators are received in the barrel, and respectively receive the zoom lens group and the focus lens group therein. The first lens group is driven by the first actuator to move along the axis thereof. The second lens group is driven by the second actuator to move along the axis thereof.

Abstract: A lens barrel including: an imaging optical system; a tube configured to contain the imaging optical system; a holder configured to hold a lens included in the imaging optical system in the tube in such a way that the lens is movable along a direction of an optical axis of the imaging optical system; a sensor unit configured to output a cyclic detection signal whose peak value changes depending on a movement amount of the holder; a memory unit configured to store a relationship between peak values of the detection signal and a position of the holder in the direction of the optical axis in advance; and an arithmetic processor configured to calculate a position of the holder in the direction of the optical axis from a peak value of a detection signal detected by the sensor unit in movement of the holder based on the relationship stored in the memory unit.

Abstract: A miniature auto-focusing lens device includes a first casing, a second casing coupled to the first casing, a movable lens set disposed in the first casing, an electromagnetic driving module provided in the first casing and configured to drive the movable lens set to perform focusing and displacement, and a fixed lens set coupled to the second casing and corresponding in position to the movable lens set. The movable lens set and the fixed lens set together form an optical system of the miniature auto-focusing lens device to perform optical focusing and imaging. The fixed lens set includes a lens that outstrips any one of the lenses of the movable lens set in size.

Abstract: A zoom lens includes a lens, a shutter-aperture, a moving barrel and a resisting ring. The lens includes a curved surface. The shutter-aperture includes a diaphragm for allowing light rays passing through and at least three blind holes. The moving barrel includes a bottom plate, a securing portion for securing the lens, at least three protrusions surrounding the securing portion and at least three elastic elements sleeved on the protrusions respectively. The securing portion and the at least three protrusions extend towards the object-side from the bottom plate. The resisting ring is disposed on an end of the moving barrel opposite to the bottom plate. The aperture-shutter is received in the moving barrel and the movement of the aperture-shutter is bounded by the resisting ring. When the zoom lens contracts, the protrusions are received in the blind holes correspondingly and the lens is received in the diaphragm.

Abstract: An optical zoom system including a photo sensor, a wafer level optical (WLO) lens module and a focusing motor is provided. The WLO lens module is located at the photo sensor. The WLO lens module includes at least one transparent substrate and at least one lens, wherein the lens is disposed on the transparent substrate. The focusing motor is located between the WLO lens module and the photo sensor. The focusing motor drives the WLO lens module to move toward or backward the photo sensor.

Abstract: A system for providing a two-position zoom-focus capability in a video inspection device comprising, in one embodiment, a focus lens cell and primary aperture attached to a set of fixed rails and connected to a zoom lens cell. In one embodiment, the focus lens cell is moveable into a first position along the rails through activation of a proximally located lens movement mechanism, and moveable into a second position through relaxation of a tensioned focus spring. In one embodiment, movement of the focus lens cell between first and second focus positions causes movement of the zoom lens cell and a secondary aperture between corresponding first and second zoom and aperture positions to provide unmagnified and magnified images of a target object.

Abstract: An actuator apparatus of the present invention includes a movable body that is arranged so as to be movable forward or rearward, and a shape memory alloy wire that is provided directly or indirectly to the movable body so as to enter a non-tension state at an ordinary temperature. The shape memory alloy wire is subjected to expansion/contraction control in which an electric current is applied thereto from a power supply portion of an external control circuit portion to change a temperature thereof to a predetermined temperature.

Abstract: A focus adjustment method of a zoom lens system is provided for correcting a focal point shift caused by manufacturing error. The zoom lens system includes three movable lens groups in which at least two of said lens groups are moved to perform zooming to form an image onto an imaging device. In the zoom lens system, a finite number of focal length positions at which a focus adjustment is performed is provided. The lens group closest to the imaging device out of the three lens groups includes a focusing lens group. A position of the focusing lens group is controlled via pulses of a stepping motor. The focus adjustment method includes the combination of performing the above control of the focusing lens group to determine a position of the focusing lens group via pulses of the stepping motor and determining an amount of adjustment of the imaging device.

Abstract: A lens barrel includes a holder, a lens frame, and an elastic member. The holder includes a first guide axis and a second guide axis. The lens frame includes a first guide section which is movably fitted around the first guide axis and a second guide section which is movably fitted around the second guide axis, and retains at least one lens. The elastic member exerts an energizing force on the second guide section and is disposed between the holder and the second guide section. The lens frame moves along the optical axis direction of the lens as the first guide section is guided by the first guide axis. The elastic member energizes the lens frame along the optical axis direction of the lens by exerting an energizing force on the second guide section. The distance from the holder to the second guide section is different from that from the holder to the first guide section.

Abstract: An actuator device includes: a piezoelectric element; a weight secured to one end of the piezoelectric element along an expansion-contraction direction thereof; and a drive member secured to another end of the piezoelectric element. The piezoelectric element and the weight are in contact so as to have a spatial overlap with respect to the expansion-contraction direction of the piezoelectric element, and the center of gravity of the weight is positioned in the vicinity of a plane that contains a contact plane in which the piezoelectric element and the weight are in contact.

Abstract: A movable lens module includes a plate type piezoelectric driving unit, a movable stage, a lens base and a lens group. The movable stage is in contact with the plate type piezoelectric driving unit, and is driven by the plate type piezoelectric driving unit to move. The lens base is disposed on the movable stage. The lens group includes at least one lens installed in the lens base. An optical lens module can be assembled by components of the movable lens module.

Abstract: A lens control apparatus having a zoom lens includes first and second operation members that give a zoom instruction for moving the zoom lens, and a controller that changes a zoom stop position to a first pattern according to the operation of the first operation member, and changes the zoom stop position to a second pattern, which has an interval wider than that in the first pattern, according to the operation of the second operation member.

Abstract: Distance information is displayed at the time of manual focusing but is not displayed at the time of automatic focusing. By rotating a focus switching ring around an optical axis for automatic focusing, an intermediate ring coupled thereto by a cam and a distance display ring rotatably coupled to the intermediate ring are moved along the optical axis to an image side. At this time, the distance display ring and the manual focus ring are uncoupled from each other. With this switching, the distance information written on the distance display ring is also moved to the image side. Therefore, the distance information, which is visible through an information display window of the focus switching ring at the time of manual focusing, becomes invisible.

Abstract: A transport system for moving and positioning an object comprising: a tube (24) having an axis of rotation and formed with threads (36) on at least a portion of its surface; at least one platform (126) to which the object (116) is mountable having threads that mesh with the threads of the tube; at least one linear guide (130) along which the at least one platform moves freely that prevents rotation of the at least one platform when the tube rotates about its axis of rotation; and a piezoelectric motor controllable to rotate the tube and thereby selectively translate the at least one platform in either direction along the tube's axis of rotation.

Abstract: A rotationally extendable structure of a lens barrel includes a stationary ring; a rotational ring, supported by the stationary ring to move in an optical axis direction while rotating and includes a peripheral gear at the rear end thereof; and a rotational-ring drive gear. The rotational-ring drive gear includes a long gear portion, formed long enough to mesh with the peripheral gear over an entire moving range of the rotational ring, and a large-diameter gear portion at the rear end of the long gear portion. The rotational ring is provided in a rear end thereof with a large-diameter-gear accommodating recess. When the rotational ring is moved to a rearward movement extremity in the optical axis direction, the large-diameter gear portion enters into the large-diameter-gear accommodating recess so that the large-diameter gear portion coincides with the peripheral gear with respect to the optical axis direction.

Abstract: A lens driver unit includes a plurality of lens groups including a first lens group and a second lens group, a first lens frame with first and second engaging portions, a second lens frame with a third engaging portion to engage with the first engaging portion, a lens barrel, a first guide element, a second guide element, at least one third guide element, an engaging element, and a drive unit. In an imaging position in which all of the lens groups including the first and second lens groups are placed on an optical axis, the first lens frame is integrally moved with the second lens frame along the optical axis by engagement of the first and third engaging portions while in a contained position, the first lens frame is rotated in a predetermined direction to retreat the first lens group outside an inner diameter of the lens barrel.

Abstract: A zoom lens includes a focus cam for converting a first rotation amount given upon a focus operation into a movement of the focus lens group and further converting a second rotation amount given upon a zoom operation into the movement of the focus lens group, and a focus cam follower engaged with the focus cam and operable to move in the focus cam. The focus cum follower rotates in the focus cum according to the rotation amount of the zoom driving unit to move the focus lens group. A lift amount of the focus cam is defined so that a rotation amount of the focus driving unit from a far end position to an infinite position when the rotation position of the zoom driving unit is at a wide-angle end becomes larger than the rotation amount when the rotating position of the zoom driving unit is at a telephoto end.

Abstract: It is provided an imaging apparatus including a plurality of motors configured to be driven to move lenses in synchronous with a drive pulse, a position detection unit configured to detect one of positions of the lenses moved by the driving of the plurality of motors, an operation unit configured to perform an output corresponding to an operation in response to the operation by a user, and a controller configured to receive the output from the position detection unit and control the plurality of motors. The controller supplies the number of drive pulses calculated based on a target position for moving the lens calculated based on the output from the operation unit and a lens position detected by the position detection unit.

Abstract: A lens barrel is provided with which manufacturing costs can be reduced. The lens barrel (3) has a first lens group (G1), a second lens group (G2), a third lens group (G3), a first support frame (10) that supports the first lens group (G1), a second support frame (20) that supports the second lens group (G2), a third support frame (30) that supports the third lens group (G3), a first driving unit (50), a second driving unit (60), and a shutter unit (29) that is fixed to the second support frame (20). The first lens group (G1) has an overall negative refractive power, and includes a prism (PR). The second support frame (20) is driven along a second optical axis (A2) by the first driving unit (50). The third support frame (30) is driven along the second optical axis (A2) by the second driving unit (60).

Abstract: The present invention aims to provide a lens drive unit installation structure which enhances dust resistance to improve reliability and realizes miniaturization and easiness to assemble. For achieving the purposes, the lens drive unit installation structure for installing a lens drive unit including: a lens holding frame for holding a lens, and a lens moving mechanism for slidingly move the lens holding frame in the direction of an optical axis using a drive source, wherein the drive source to be linked with the lens moving mechanism is arranged on the side of the lens holding frame view from the direction of the optical axis, and a partition is set between the lens holding frame and the drive source, thereby the lens and the drive source are arranged separately from each other.

Abstract: A lens module includes an upper coupling element, a spring, a magnet yoke, a plurality of magnets, a coil, a lens holder and a lower coupling element. The magnet yoke is disposed under the spring and has a cylindrical inner wall, multiple extension slices and a top wall. The top wall is outwardly extended from an upper edge of the cylindrical inner wall. The extension slices are downwardly and axially extended from a periphery of the top wall and circumferentially arranged on the top wall at regular intervals. The magnets are attached on inner surfaces of respective extension slices of the magnet yoke. At least two raised structures are circumferentially arranged on the lower periphery of the lens holder. The lower coupling element includes at least two concave structures mating with the raised structures.

Abstract: A lens apparatus including an optical element includes a motor configured to drive the optical element; a position detector configured to detect a relative position of the optical element; and a controller configured to detect an origin of the optical element by returning the optical element to the origin by controlling the motor. The controller controls the motor so that a speed of the optical element moving to the origin is higher than a speed of the optical element moved by an operation of an operator.

Abstract: The present invention includes a pair of first gear 11 and second gear 12 having the same tooth profile and rotatably combined in a state wherein rotation centers of the gears are coincident. One gear of the pair of gears 11 and 12 is formed with elastic displacement portion 15 that is biased in a direction of rotating the other gear with respect to one gear. The other gear is formed so that it has positioning portion 21 that positions the other gear with respect to one gear, and elastic displacement portion 15 contacts positioning portion 21.

Abstract: A lens barrel has a first lens group, a second lens group, a third lens group, a first support frame for supporting the first lens group, a second support frame for supporting the second lens group, a first driving unit, a shutter unit, and an aperture unit. The first lens group has an overall negative refractive power, and includes a prism. The second support frame is driven along a second optical axis by the first driving unit. The shutter unit has a shutter mechanism, a shutter drive motor configured to drive the shutter mechanism, a neutral density filter, and a filter drive motor configured to drive the neutral density filter. The shutter drive motor and the filter drive motor are disposed flanking the second optical axis when viewed in a direction along the second optical axis.

Abstract: A lens unit includes: a first lens group arranged in a first optical axis direction of the lens unit, on which a light flux from an object is incident; a second lens group provided closer to an image side than the first lens group and arranged in a second optical axis direction; a bending section provided between the first and the second lens groups, which bends the first optical axis in the second optical axis direction, wherein the first and second lens groups are movable in the respective optical axes when a zooming operation is carried out; an actuator which drives the first and second lens groups; a first drive mechanism which moves the first lens group; a second drive mechanism which moves the second lens group; and a coupling member which concurrently transmits drive force from the actuator to the first and second drive mechanisms.

Abstract: The present invention aims to provide an imaging device and a camera realizing simultaneously a high magnification zoom lens system and the miniaturization of the device. The imaging device (2) includes a first lens group (G1), a second group frame unit (42), a first group frame unit (41), a motor unit (32), a third lens group (G3), and a CCD unit (33). The first lens group (G1) takes in a light flux incident along a first optical axis (A1). The second group frame unit (42) bends the light flux incident along the first optical axis (A1) to a direction along a second optical axis (A2). The first group frame unit (41) retains the first lens group (G1), and moves the first lens group (G1) in the direction along the first optical axis (A1). The motor unit (32) drives the first group frame unit (41).

Abstract: An optical element position control mechanism includes an optical element holding member, a lead screw rotatable on a rotational axis parallel to movement direction of the optical element holding member, a linearly moving nut screw-engaged with the lead screw and engaged with the optical element holding member, and a rotation prevention device preventing the linearly moving nut from rotating about the lead screw. Rotations of the lead screw cause the linearly moving nut to move along the lead screw, a position of the optical element holding member being determined by the linearly moving nut. A biasing device is positioned between the linearly moving nut and the optical element holding member and is resiliently deformable in a plane substantially parallel to a plane which includes the rotational axis of the lead screw, and applies a biasing force against the linearly moving nut so as to be prevented from rotating.

Abstract: A camera module includes a lens unit, a magnet, a stator and an elastic element. The stator includes an upper coil seat with an upper coil wound therearound and a lower coil seat with a lower coil wound therearound. The upper and the lower coils establish an induced magnetic field when electric currents are applied thereto. The induced magnetic field interacts with the magnet to generate a magnetic force driving the lens unit into a telescopic movement. The elastic element includes a plurality of ribs. Each rib includes a fixed end connected with the stator and an opposite movable end. The moveable end moves together with the lens unit with respect to the fixed end to cause the ribs to deform and generate an elastic force. The lens unit stops at a focal position when the magnetic force and the elastic force come to a balance.

Abstract: Embodiments of a zoom lens barrel assembly for an imaging apparatus are provided. The zoom lens barrel has a simple structure and allows efficient space utilization in order to realize a compact size, which is currently required for a mobile imaging apparatus. The zoom lens barrel assembly can stably endure external impacts, provide more precise zoom operations, and stably operate for a long time without a malfunction of a zoom motor, which acts as a drive source. The zoom lens barrel assembly can increase the rotation gain of a driving source and improve space utilization inside a basic skeletal structure of a frame by modifying the structure of a gear train, which cooperatively connects the driving source and a rotary cam member.

Abstract: The present invention provides a lens unit including: a first lens group; a second lens group; an optical-path bending member; a movable frame holding the first lens group; a stationary frame holding the movable frame movably in an direction of the first optical axis, and adopted to telescopically house the movable frame therein; and a bending-member moving mechanism for moving the optical-path bending member. When an image is taken, the movable frame protrudes from the stationary frame and the optical-path bending member is arranged at a position so as to bend the first optical axis in the direction of the second optical axis. When the lens unit retracts, the bending-member moving mechanism moves the optical-path bending member to retreat the optical-path bending member from an area where the first lens group to be housed in the stationary frame.

Abstract: Goal: Providing a vibration-proof lens that can restrict an increase in thickness in the direction of the optical axis. Means: A vibration-proof lens unit comprising a lens holder that holds a vibration-proof lens; a support that supports the lens holder in a manner to be movable within a plane orthogonal to an optical axis of the vibration-proof lens; an engaging section that engages the lens holder with the support such that the lens holder can move (i) in a rotational direction around an axis line parallel to the optical axis of the vibration-proof lens and (ii) in a direction of a rotational radius orthogonal to the axis line; a rotational driving unit that moves the lens holder in the rotational direction; and a linear driving unit that moves the lens holder in the direction of the rotational radius.

Abstract: An optical apparatus is disclosed which includes an integrally-formed rack that can be manufactured easily even when a tooth portion of the rack has a drawing angle with respect to a lead screw. The apparatus includes a holding member holding an optical member, a rack attached to the holding member, and an actuator rotating the lead screw. The rack is integrally formed and includes an attachment portion for being attached to the holding member, first and second tooth portions engaging with the lead screw so as to sandwich the lead screw therebetween, and an elastic connecting portion connecting the attachment portion and the second tooth portion. The second tooth portion is formed to have a gap from the first tooth portion such that the gap is narrowed with distance from the attachment portion. The connecting portion is provided with a protrusion protruding toward the first tooth portion.

Abstract: A lens barrel includes a first optical element that is allowed to move along an optical axis, a first driven member connected to the first optical element, a second optical element disposed in the optical axis of the first optical element, which is allowed to move along the optical axis, a second driven member connected to the second optical element, a first drive shaft disposed substantially parallel to the optical axis to drive the first driven member along the optical axis, a second drive shaft disposed substantially parallel to the optical axis to drive the second driven member along the optical axis, a first drive unit connected to an end of the first drive shaft to drive the first drive shaft, and a second drive unit connected to an end of the second drive shaft to drive the second drive shaft and disposed at a position that partially overlaps a position of the first drive unit when viewed from the direction of the optical axis.

Abstract: A lens apparatus includes a barrel and a focus member mounted on the barrel. The barrel includes a fixing body and an engaging unit disposed at an outside wall of the fixing body. The focus member includes a retaining body contacted with the outside wall of the fixing body and a retaining unit disposed at an inside wall of the retaining body. The retaining unit and the engaging unit fasten each other for mounting the focus member on the barrel. When a force is applied on the focus member, the focus member drives the barrel to rotate by a friction generated between the retaining unit and the engaging unit.

Abstract: A lens barrel includes: a lens holding frame holding a lens; a barrel body housing the lens holding frame; motion conversion means for converting rotary motion of the lens holding frame into reciprocating motion along the optical axis of the lens; a manual ring provided on the outer side of the barrel body and rotating around the optical axis; a coreless stepper motor provided on the outer side of the barrel body and rotating around the optical axis; rollers provided between the manual ring and the stepper motor, and rotating in synchronization with the rotation of the manual ring and the stepper motor; motor rotation preventing means for preventing the stepper motor from rotating when the rollers transfer the rotation of the manual ring; an intermediate ring rotating around the optical axis; and a transfer unit transferring the rotary motion of the intermediate ring to the lens holding frame.

Abstract: An exemplary camera device includes a holder, an image sensor, an outer barrel with an axis, an inner barrel unit. The image sensor is disposed in the holder. The inner barrel unit includes an inner barrel and at least one lens disposed in the inner barrel. The inner barrel is threadedly received in the outer barrel. The holder includes a first ring-shaped part, and the outer barrel includes a second ring-shaped part. The first ring-shaped part is coupled to the second ring-shaped part.

Abstract: An electromagnetic transmission device. A guide bar connects to a fixed base and includes magnetic-permeable material and a first central height plane. A coil connects to the fixed base. A support base movably fits on the guide bar. An annular magnetic member connects to the support base and is surrounded by the coil. A magnetization direction of the annular magnetic member is perpendicular to a moving direction of the support base and annular magnetic member. The annular magnetic member includes a second central height plane. The coil interacts with the annular magnetic member to generate a first force. When moving to separate the second central height plane from the first central height plane, the annular magnetic member interacts with the guide bar to generate a second force, driving the support base and annular magnetic member to move along a direction perpendicular to the magnetization direction of the annular magnetic member.

Abstract: A lens drive device may include a movable body, a support body supporting the movable body through a spring member, and a magnetic drive mechanism provided with a coil. The movable body includes a coil winding part, end parts for restricting a range of the coil winding part, and a changing part for changing a drawing direction of the coil. The spring member is disposed near the other end part of the movable body and electrically connected with winding start and winding end of the coil. A coil winding method for the lens drive device may include a drawing step in which a coil is drawn between end parts, a changing step in which a drawing direction of the coil is changed by the changing part, and a winding step in which the coil is wound around the coil winding part.