Abstract: An edge exposure tool may include a lens adjustment device that is capable of automatically adjusting various parameters of an edge exposure lens to account for changes in operating parameters of the edge exposure tool. In some implementations, the edge exposure tool may also include a controller that is capable of determining edge adjustment parameters for the edge exposure lens and exposure control parameters for the edge exposure tool using techniques such as big data mining, machine learning, and neural network processing. The lens adjustment device and the controller are capable of reducing and/or preventing the performance of the edge exposure tool from drifting out of tolerance, which may maintain the operation performance of the edge exposure tool and reduce the likelihood of wafer scratching, and may reduce the down-time of the edge exposure tool that would otherwise be caused by cleaning and calibration of the edge exposure lens.

Abstract: An optical element drive mechanism is provided. The optical element drive mechanism includes an immovable part, a first movable part, a first drive assembly, and a guidance assembly. The first movable part is movable relative to the immovable part. The first movable part is connected to a first optical element. The first drive assembly drives the first movable part to move relative to the immovable part. The guidance assembly guides the movement of the first movable part in the first dimension.

Abstract: An optical element driving mechanism is provided. The optical element driving mechanism includes a housing, a base unit, a holding unit, a driving assembly, and a metal component. The base unit is connected to the housing. The holding unit is configured to hold an optical element having an optical axis and movable relative to the housing and the base. The driving assembly is configured to drive the holding unit to move relative to the housing and the base unit. The metal component is disposed in the base unit, wherein at least a portion of the metal component is connected to the driving assembly.

Abstract: A lens drive device includes a movable portion, a fixed portion, and a nonmagnetic case. The movable portion includes a double-pole magnet having two pairs of magnetic poles, a first coil opposing to the double-pole magnet in a perpendicular direction to a light axis, and a lens holder being movable to the double-pole magnet in a direction of the light axis. The fixed portion includes a second coil arranged so as to oppose to the double-pole magnet in the direction of the light axis. The nonmagnetic case is attached to the fixed portion so as to cover the movable portion. The double-pole magnet includes a first section and a second section. L1/L2 is 0.9 to 1.1, where L1 and L2 are respectively a length of the first and second sections in the direction of the light axis.

Abstract: A camera module includes an imaging lens system, an image sensor and a plurality of light-folding elements. The imaging lens system is configured to focus imaging light onto an image surface. The image sensor is disposed on the image surface. The plurality of light-folding elements includes at least one image-side light-folding element disposed on an image side of the imaging lens system, and each of the light-folding elements is configured to fold the imaging light from an entrance optical path thereof to an exit optical path thereof. At least one light-shielding mechanism is arranged on at least one of the entrance light path and the exit light path of the at least one image-side light-folding element. The at least one light-shielding mechanism has a minimal opening, and the minimal opening surrounds the imaging light in the at least one of the entrance optical path and the exit optical path.

Abstract: Provided is an operation apparatus for operating driving of an optical member, the operation apparatus including: a storage configured to store a speed of the optical member in advance; an operation member; and a processor configured to generate a command corresponding to the stored speed based on an operation of the operation member, wherein the processor is configured to perform processing of changing the generated command to another command based on a state of the optical member of which driving is operated based on the generated command.

Abstract: A camera module includes a housing, a unitary element, an optical lens assembly, an image-side light blocking assembly and a driving device. The unitary element is one-piece formed from a lens carrier and a lens barrel and movably disposed in the housing. The optical lens assembly is disposed in the unitary element. The image-side light blocking assembly includes at least one light blocking sheet, and the image-side light blocking assembly does not contact the optical lens assembly. The driving device is disposed between the housing and the unitary element. The driving device drives the unitary element, the optical lens assembly and the image-side light blocking assembly to move in an optical axis direction parallel to an optical axis of the optical lens assembly by electromagnetic force. A minimal inner opening of the unitary element is located between the optical lens assembly and the image-side light blocking assembly.

Abstract: A camera module for a vehicular vision system includes a camera housing having a rear camera housing portion, a front camera housing portion, and a lens barrel at the front camera housing portion. A lens assembly includes a plurality of optical elements arranged along an optical path for focusing images at an imager. The optical elements include barrel-mounted optical elements disposed in the lens barrel and an outermost optical element disposed at a removable cover element. The cover element is removably attached at an outer end of the lens barrel such that, when attached, the outermost optical element is at an appropriate location relative to the barrel-mounted optical elements for focusing by the plurality of optical elements of images at the imager.

Abstract: A camera module includes a carrier accommodating lenses, a housing accommodating the carrier, a first driving part configured to move the carrier in an optical axis direction, and a second driving part configured to move at least one lens of the lenses relative to the carrier in the optical axis direction.

Abstract: An electronic device comprises an adjustment unit for adjusting a focus distance of a lens unit and obtainment unit for obtaining, from the lens unit, first information relating to a first range and second information relating to a second range. The first range being a focus range of the lens unit, and the second range being a focus range, in the first range, in which adjustment by the adjustment unit is limited. The electronic device controls, on the basis of the first information and the second information, the display device so as to display the first range and the second range to be distinguishable from each other.

Abstract: A lens barrel 10 comprises a holding frame 51, a guide pole 53 supported by the holding frame 51, a focus lens unit 52 that moves along the guide pole 53, a first actuator (a yoke 21, a coil 22, and a driving magnet 23) that relatively moves the focus lens unit 52 along the guide pole 53 with respect to the holding frame 51, and a second actuator (a gear 55 and a stepping motor 56) that rotationally drives the guide pole 53 around the axis.

Abstract: A lens driving device is disclosed that includes a first mover, a second mover and plate springs. The first mover is provided with a first through hole for accommodating a first lens body with an optical axis in a Z direction, and includes a pair of first plate-like magnets arranged parallel to each other at positions across the first through hole. The second mover is provided with a second through hole for accommodating a second lens body with an optical axis in the Z direction, and includes a pair of second plate-like magnets arranged parallel to each other at positions across the second through hole. The plate springs respectively support the first mover and the second mover movably in the Z direction. The first mover and the second mover are arranged side by side in a direction orthogonal to the Z direction.

Abstract: The camera assembly includes an enclosure, a carrier plate, a driver, and a lens barrel. The enclosure has a front side, and a back side, and a channel inside. The channel connects a lens barrel socket on the front side. The lens barrel is coupled to the lens barrel socket. The channel also connects a chamber inside the enclosure. The carrier plate and driver are housed in the chamber. A number of filters are on the carrier plate. The driver engages the carrier plate to move reciprocally so that a filter is aligned with the channel. The chamber is sealed by a cover piece. By integrating the carrier plate, filters, driver, image sensor chip, and enclosure together, the camera assembly has simplified structure and reduced dimension for effective miniaturization.

Abstract: A lens driving device is provided which includes a housing supporting a magnet; a bobbin having a first coil disposed on the outer peripheral surface thereof and moved by an interaction between the magnet and the first coil; an upper elastic member and a lower elastic member coupled to the bobbin and the housing; and a sensing coil disposed at the housing to be spaced apart from the magnet and generating an induced voltage by an interaction with the first coil, the sensing coil being wound around a side part of the housing so as to rotate in a clockwise direction or in a counterclockwise direction with reference to an optical axis.

Abstract: A blade driving device includes: one or more blades; a base part for supporting the blade and to which an attraction magnet is fixed; a rod part rotatably and axially supported by the base part and including a connection portion connected to the blade; a rotation part rotatably and axially supported by the base part and including a connection portion connected to the rod part; a driving magnet-iron including magnet pole surfaces of different polarities fixed to the rotation part; and a coil wound around one of the magnet pole surfaces. The blade drive device includes a power supply terminal for supplying power from the wound coil to an external component, so as to supply power from a connection terminal provided at the connection line fixing base and connected to an external component via a spring leaf arranged on the lens driving device.

Abstract: A lens device includes a first motor, a second motor, a lens, a cam ring, and a gear part. The cam ring is configured to, in cooperation with the first motor and the second motor, drive the lens to move in a direction along an optical axis of the lens. The gear part is configured to transmit a power of both the first motor and the second motor to the cam ring. The gear part includes a first gear connected to a first shaft of the first motor, a second gear connected to a second drive shaft of the second motor, and a third gear that meshes with the first gear and the second gear. The power of the first motor and the second motor is transmitted to the cam ring via the third gear.

Abstract: A camera module includes a housing, a unitary element, an optical lens assembly, an image-side light blocking assembly and a driving device. The unitary element is one-piece formed from a lens carrier and a lens barrel and movably disposed in the housing. The optical lens assembly is disposed in the unitary element. The image-side light blocking assembly includes at least one light blocking sheet, and the image-side light blocking assembly does not contact the optical lens assembly. The driving device is disposed between the housing and the unitary element. The driving device drives the unitary element, the optical lens assembly and the image-side light blocking assembly to move in an optical axis direction parallel to an optical axis of the optical lens assembly by electromagnetic force. A minimal inner opening of the unitary element is located between the optical lens assembly and the image-side light blocking assembly.

Abstract: A camera module for a vehicular vision system includes a camera housing having a rear camera housing portion, a front camera housing portion, and a lens barrel at the front camera housing portion. A lens assembly includes a plurality of optical elements arranged along an optical path for focusing images at an imager. The optical elements include barrel-mounted optical elements disposed in the lens barrel and an outermost optical element disposed at a removable cover element. The imager is optically aligned with an optical axis of the lens assembly. The cover element is removably attached at the lens barrel such that, when attached, the outermost optical element is at an appropriate location relative to the barrel-mounted optical elements for focusing of images at the imager. The cover element seals against the lens barrel when the cover element is attached and seated at the lens barrel.

Abstract: A method for displaying virtual content to a user, the method includes determining an accommodation of the user's eyes. The method also includes delivering, through a first waveguide of a stack of waveguides, light rays having a first wavefront curvature based at least in part on the determined accommodation, wherein the first wavefront curvature corresponds to a focal distance of the determined accommodation. The method further includes delivering, through a second waveguide of the stack of waveguides, light rays having a second wavefront curvature, the second wavefront curvature associated with a predetermined margin of the focal distance of the determined accommodation.

Abstract: Lens barrel according to the present exemplary embodiment is provided with lens unit, stationary frame, focus ring, focus grip, and a fixing section. Lens unit has an optical system. Stationary frame supports lens unit to be movable in a direction of optical axis X of the optical system. Focus ring is disposed on an outer circumferential side of lens unit, and is rotated when focus adjustment is manually performed. Focus grip is provided to protrude outwardly from focus ring, and operated for rotating focus ring. The fixing section fixes focus ring to stationary frame when focus adjustment is automatically performed. The fixing section has fixing button which is disposed on focus grip and operated for fixing focus ring to stationary frame.

Abstract: Provided is an electrochromic device including: an electrochromic element including an electrochromic layer disposed between a pair of electrodes; a drive unit, which is connected to a power supply portion included in each of the pair of electrodes to drive the electrochromic element; a controller, which is configured to control the power supply portion; and an orientation detection unit, which is configured to detect an orientation of the electrochromic element. The controller is configured to control the power supply portion depending on output from the orientation detection unit.

Abstract: The present embodiment relates to a dual camera module comprising: a substrate; a first image sensor disposed on the substrate; a second image sensor disposed on the substrate while being spaced apart from the first image sensor; a housing disposed on the upper side of the substrate; a first bobbin disposed on the upper side of the first image sensor inside the housing; a second bobbin disposed on the upper side of the second image sensor inside the housing; a first coil disposed in the first bobbin; a second coil disposed in the second bobbin; and a first magnet which is disposed between the first coil and the second coil and faces the first coil and the second coil.

Abstract: A collapsible lens barrel includes: an opening/closing unit (shutter unit) that includes an opening/closing portion (shutter blade) openable and closable along a plane orthogonal to an optical axis to control a light amount, and a maintaining portion (projection) that maintains an opened state of the opening/closing portion; an inner lens disposed closer to an object than the opening/closing unit is; an inner frame that holds the inner lens; an outer lens disposed closer to the object than the inner lens is; an outer frame that holds the outer lens; and a restriction portion that restricts operation of the maintaining portion by restriction applied from the outer frame to the maintaining portion via the inner frame to maintain the opened state of the opening/closing portion when the outer frame and the inner frame are collapsed.

Abstract: A lens driving device is provided, the lens driving device including a housing including a through hole; a bobbin accommodated at the through hole; a magnet disposed on the housing; a first coil disposed on the bobbin and facing the magnet; a first support member coupled to the housing and the bobbin, and movably supporting the bobbin in a direction of an optical axis; a protrusion part outwardly protruded from an outer lateral surface of the bobbin; and a groove part on the housing at a position corresponding with the protrusion part and accommodating at least a portion of the protrusion part, wherein an outer lateral surface of the protrusion part includes a first surface, a second surface and a third surface disposed between the first surface and the second surface, wherein each of the first surface, the second surface and the third surface is parallel with an inner lateral surface of the groove part, and wherein an angle between the first surface and the third surface, and an angle between the second surf

Abstract: A wafer level camera module includes an image sensor including an imaging region formed on a top surface thereof, a first support layer disposed on the image sensor and having an opening, and first and second zooming units sequentially stacked having a second support layer interposed therebetween. Each zooming unit includes a piezoelectric thin film disposed on the first support layer and having an opening. Each zooming unit further includes a deformable layer disposed on the piezoelectric thin film. Each zooming unit additionally includes a lens attached to the deformable layer and positioned to overlap the imaging region. The wafer level camera module additionally includes a first conductive via penetrating through the camera module to be electrically connected to the first piezoelectric thin film. The camera module further includes a second conductive via penetrating through the camera module to be electrically connected to the second piezoelectric thin film.

Abstract: A camera lens module includes an image sensor and a lens assembly. The image sensor includes a photosensitive chip defining a photosensitive path, wherein the lens assembly is coupled to the image sensor along the photosensitive path of the photosensitive chip. The lens assembly includes at least one optical lens module and an aperture member coupled at the optical lens module, wherein the optical lens module includes a lens barrel and at least an optical lens supported within the lens barrel. A relative position of the lens assembly with respect to the image sensor is adjustable for calibration and the relative position of the optical lens module is permanently fixed after calibration.

Abstract: LED lighting apparatus defining a longitudinal axis and including a lens, an element holder for holding the lens and having at least one guide pin, a fixture body for receiving the element holder and having at least a first plurality of slots extending transverse the longitudinal axis of the apparatus. The guide pin is received in at least one of the slots corresponding to a first beam angle of the lens, the element holder being configured to be selectively movable to one of the plurality of slots for selecting a projection beam angle of the LED lighting apparatus. A second plurality of slots is provided extending along the longitudinal axis and connecting the horizontal slots, such that the guide pin is repositioned from one of the first slots to another of the first slots by traveling along one of the second plurality of slots.

Abstract: An optical module includes: a first holding device with a circumference extending in a first circumferential direction; and a plurality of first supporting devices configured to support a first optical element, the first supporting devices being fixed at the circumference of the first holding device. Along the first circumferential direction, at least one of the first supporting devices is located in a non-equidistant manner between two neighboring first supporting devices. The optical module is configured to be used in a microlithography objective.

Abstract: A lens barrel that is capable of miniaturizing and thinning an image pickup apparatus by enabling to switch manual lens drive and electric lens drive with a simple mechanism. A lens barrel is mounted on an image pickup apparatus that supports an operation member rotatably. A drive barrel engages with a lens holding member to drive it in an optical axis direction. A motor transfers rotation to the drive barrel through a transfer mechanism. A switching mechanism switches between electric lens drive that drives the lens holding member by transferring rotation of the motor to the drive barrel and manual lens drive that drives the lens holding member by transferring rotation of the operation member to the drive barrel via an elastic member that rotates together with the operation member according to a user's operation. The drive barrel engages with the elastic member while shifting to a photographing area.

Abstract: A rotation regulating device and a lens barrel includes a rotating ring, a holder that rotatably holds the rotating ring, a rotation regulator that regulates the rotation of the rotating ring by contacting and stopping the rotating ring, and a receiver that receives a part of the rotation regulator. The rotation regulator is held on the holder and formed of an elastic body. The holder includes a holding shaft that holds the rotation regulator and a rotation stopper that stops the rotation regulator to prevent the rotation regulator from rotating about the holding shaft.

Abstract: To obtain a zoom lens easily performing image blur correction and maintaining optical performance while performing image blur correction while restricting an increase in size of the lens. A zoom lens including, in order from an object side: a positive first unit; a negative second unit; a positive third unit; and a rear group that has one or more units. Spacings between adjacent units change during zooming. First and second correction systems rotatable about first and second centers on or in the vicinity of an optical axis during blur correction are respectively constituted by at least a part of the second unit and at least a part of an optical system disposed on image side of the second unit. The first and second centers are on image side of a surface vertex of the respective first and second correction systems closest to the object side.

Abstract: A lens driving module for driving a lens along an optical axis is provided. The lens driving module includes a stator having a hollow cylindrical shape through which the optical axis passes through and including coils, a rotator having a hollow shape through which the optical axis passes, mounted on an outer side of the stator, capable of rotating with respect to the stator with the optical axis as a center line, and including magnets facing the coils, and at least one of rotation connecting members connecting the rotator to the stator such that the rotator may rotate with respect to the stator to maintain a gap between the coils and the magnets.

Abstract: A camera module for a motor vehicle having a lens objective, a lens holder holding said lens objective, and a back plate connected to said lens holder and holding an image sensor in or close to an image plane of the lens objective. The materials, shapes and/or relative positions of the components of the lens objective are designed to keep the image plane in or close to the sensitive plane of the image sensor over an operating temperature range of the camera module.

Abstract: The imaging device is constituted of a lens, an imaging device receiving the incident light and converting the incident light to be an electrical signal, a cylindrical member accommodating the lens, a holder holding the imaging device, a groove formed of an outer periphery surface of the cylindrical member and an inner periphery surface of the holder, an adhesive provided in the groove with the outer periphery surface and the inner periphery surface being contacted with each other, and an anchor mechanism provided in the groove, producing an anchor effect in combination with the adhesive, thereby increasing the strength of a joint between the cylindrical member and the holder.

Abstract: A photographing apparatus comprising: a focus adjustment lens which is provided within a lens barrel containing a photographing lens and is movable in an optical axis direction; a ring member disposed rotatably with respect to the lens barrel in an angle range from a first end point to a second end point; a storage unit to store a first relationship between a rotation angle of the ring member and a distance, and a second relationship between a position of the focus adjustment lens in the optical axis direction and the distance; and a control unit to calculate a distance corresponding to a rotation angle of the ring member according to a rotation angle of the ring member and the first relationship, and to set a position of the focus adjustment lens in the optical axis direction according to the distance and the second relationship.

Abstract: A rack includes a first member including a main tooth, a second member including an opposite tooth disposed opposite the main tooth, the second member being rotatable with respect to the first member, a first forcing unit configured to force the main tooth, and a second forcing unit configured to force the main tooth and the opposite tooth closer to each other. On a plane perpendicular to a central axis of a lead screw, each of a part at which the first forcing unit forces the first member, a part at which the second forcing unit forces the first member, and a part at which the second forcing unit forces the second member is disposed on a movable member side with respect to a straight line connecting a rotating axis of the second member and the central axis.

Abstract: The lens barrel includes a main aperture stop, a first sub aperture stop including a first stop blade and a first driving member rotatable about an optical axis to drive the first stop blade in its open and close direction, a second sub aperture stop including a second stop blade and a second driving member rotatable about the optical axis to drive the second stop blade in its open and close direction, and a cam barrel including a first cam portion engaging with a first engagement portion provided to the first driving member and a second cam portion engaging with a second engagement portion provided to the second driving member. The cam barrel is rotatable about the optical axis to rotate the first and second driving members.

Abstract: An imaging system may include a movable component that travels along a rail, the movable component being coupled to the rail by a carriage that includes a bearing and a magnetic portion configured to bias the bearing toward the rail. The imaging system may be suitable for use in a gimbal assembly.

Abstract: A method for focusing a miniature camera includes providing a current through a coil, moving a lens of a camera based on the current to adjust a focus of the camera, and limiting movement of the lens along an optical path of the camera.

Abstract: A lens barrel 16 includes a movable cam ring 8, and a first lens holder 1b holding a first lens unit 1a and configured to follow a cam groove 8f formed on the movable cam ring 8, and the first lens holder 1b is provided with an opening 1c into which at least part (a protrusion 8c) of the movable cam ring 8 is insertable.

Abstract: An optical instrument of the present invention has a first lens group and a second lens group capable of moving in an optical axis direction in order to perform optical zooming, and comprises a storage section for storing first position information relating to positions of the first lens group and positions of the second lens group corresponding to identical focal lengths that fall within a focal length region range in which zoom operations of the optical instrument are carried out, and second position information relating to positions of the first lens group and positions of the second lens group corresponding to different focal lengths that fall within the focal length region, and establishes a second optical state of a higher shooting magnification than a first optical state, when establishing substantially the same focal length as a focal length of the first optical state based on the first position information.

Abstract: A lens barrel includes an extendable barrel unit, a drive unit configured to drive the barrel unit so as to extend the barrel unit, and a transmission unit configured to transmit a drive force of the drive unit to the barrel unit, the transmission unit includes a first gear and a second gear coaxially disposed and a biasing member configured to bias at least one of the first gear and the second gear such that the drive force is transmitted between the first gear and the second gear, and the transmission unit is configured to block transmission of the drive force between the first gear and the second gear depending on a rotational force applied to at least one of the first gear and the second gear.

Abstract: A controller for microscope lenses for correcting spherical aberration and for adjusting particularly difficult to access microscope lenses to an optimum of imaging quality, enabling automatic adjustment of the different actuators of a microscope lens, to effect a simple, cost-effective, user-friendly, and precise balance, particularly of cover slip deviations and different base thicknesses of Petri dishes for the purposes of increasing imaging quality. At least two movable elements of a microscope objective supporting lenses or lens groups, are provided in a movable manner in the axial direction along the optical axis of the microscope objective relative to the housing of the microscope lens in a motor-actuated manner by way of respective adjusting rings. A controller externally controlled and disposed in the microscope lens is provided for storing different characteristic curves for paths of motion of the movable elements.

Abstract: A surveying instrument which comprises a rotation unit 7 adapted to direct a distance measuring optical axis to an object to be measured and the rotary drive unit 5 rotates the rotation unit, comprising a rotary motor for rotating an output shaft 6 and a clutch unit for connecting or disconnecting the rotary motor and the output shaft, wherein the rotary motor and the clutch unit are arranged in a series along the output shaft, and the output shaft is fixed to the rotation unit.

Abstract: A focusing motor an enclosure includes: a lens barrel; a lower support; an iron sheet perpendicularly fixed to the lower support; a coil attached to an inner surface of the iron sheet; at least one pair of magnets arranged on an outer side of the barrel along an optic axis of the barrel and parallel to the coil, a magnetic pole of one magnet is opposite to that of an adjacent magnet; a first guide rail disposed on the outer side of the barrel; a second guide rail disposed on an inner side of the lower support and parallel to the first guide rail; and a pulley assembly located between the barrel and the lower support, and movable along the first and second guide rails.

Abstract: A method for focusing a miniature camera includes providing a current through a coil, moving a lens of a camera based on the current to adjust a focus of the camera, and limiting movement of the lens along an optical path of the camera.

Abstract: Disclosed is a camera module. The camera module according to one embodiment includes a lens barrel disposed in a housing to receive a lens; a driving unit moving the lens barrel relative to the housing; and a circuit board electrically connected to the driving unit. The driving unit includes a first driving unit in the lens barrel; and a second driving unit in the housing. A portion of the second driving unit directly makes contact with the circuit board.

Abstract: Provided is a catheter operating structure in which a medical device such as a stent is rotated to move forward or backward without being repeatedly pushed or pulled when inserted into the lumen of a human body, so that a surgical position can be precisely adjusted by the forward or backward movement. A rotary member includes a spiral shaft formed on a handle so as to be inserted into a tubular body. A movable member includes a female spiral end that is formed at one end thereof and is spirally coupled with the spiral shaft. An injection member moving member moves together with the movable member. When the spiral shaft is rotated by rotation of the handle with the spiral shaft spirally coupled to the female spiral end, the movable member moves forward or backward without being rotated due to the injection member moving member.

Abstract: A stage light fixture is provided with a light source adapted to emit a light beam along an optical axis, and a color filter assembly comprising a plurality of color filters rotating about a same first axis of rotation, the first axis of rotation being parallel to the optical axis and not coincident with the optical axis.

Abstract: A lens holder driving device includes a lens holder in which a lens assembly is mounted, a driving coil fixed to the lens holder at outside circumference thereof, a magnet opposite to the driving coil, a yoke including the magnet, an elastic member supporting the lens holder in a direction of an optical axis shiftably, and a base disposed at a lower side of the lens holder. The yoke includes an outer yoke including the magnet at an inner wall surface thereof. The elastic member includes an upper elastic member disposed at an upper side of the lens holder. The upper elastic member is mounted to the inner wall of the outer yoke in a state where the upper elastic member is positioned and fitted to a spacer.