Abstract: A dual pole electromagnetically-driven focusing system of a micromotor includes a movable base having an elastic support system on upper and lower sides thereof and an outside configuration in a parallelepiped form having four side surfaces. Two loop coils are respectively fixed to two opposite side surfaces of the slidable base. Two dual-pole magnets are respectively arranged beside the two loop coils in a manner of being opposite to each other in respect of magnetism so that the two loop coils, upon energized, generate acting forces in opposite direction with respect to the two dual-pole magnets. A circuit device is arranged on one side surfaces of the movable base between the two loop coils. Three successive side surfaces of the movable base that are respectively provided with a combination of loop coil and dual-pole magnet, the circuit device, another combination of loop coil and dual-pole magnet, form a U-shaped structure.

Abstract: A lens barrel has a first lens-holding frame that holds a first lens group; a second lens-holding frame that holds a second lens group; and a lens-barrel casing. A first lens-driving unit drives the first lens-holding frame in the optical axis direction. A second lens-driving unit drives the second lens-holding frame in the optical axis direction. The first lens-driving unit is fixed to the fixing member. The second lens-driving unit is fixed to the first lens-holding frame.

Abstract: The present invention relates to a method for setting slave identification information for an actuator movement sensing element and, more particularly, to a method for sensing a distance, by which an actuator having a lens assembly coupled thereto has moved in one direction among an x-axis, a y-axis, and a z-axis, and transmitting the sensed distance to a master controller according to a two-wire interface scheme. The method comprises the steps of: when a slave identification information change command is received from a master controller, checking whether actuator movement distance sensing data is input from a hall sensor allocated to itself; and as a result of the checking, when actuator movement distance sensing data equal to or greater than a set value is input, setting slave identification information assigned at the time of production to be changed into slave identification information transmitted by the master controller.

Abstract: A photographing module includes a metal cover, a base, a lens portion and a leaf spring. The lens portion is displaceably disposed in an inner space. The leaf spring is assembled with the lens portion and includes an inner fixing portion, an outer fixing portion and an elastic portion. The inner fixing portion is assembled with the lens portion. The outer fixing portion contacts and is fixedly disposed with the metal cover. The elastic portion connects the inner fixing portion and the outer fixing portion. The leaf spring further includes a plurality of contact portions and a plurality of auxiliary elastic portions. Each of the auxiliary elastic portions connects the outer fixing portion and one of the contact portions. For the leaf spring, only the contact portions thereof contact side plates of the metal cover.

Abstract: Some embodiments include a camera voice coil motor (VCM) actuator configured to shift a lens and/or an image sensor along multiple axes. The VCM actuator may include a bottom flexure and a top flexure that connect one or more dynamic members to one or more static members. The VCM actuator may include stationary magnets and coils held by dynamic members. In some cases, the VCM actuator may be configured to move the image sensor along an optical axis, to move the image sensor in directions orthogonal to the optical axis, and/or to tilt the image sensor relative to the orthogonal axis. In some examples, the VCM actuator may be configured to move the image sensor in directions orthogonal to the optical axis, to move the lens along the optical axis, and/or to tilt the lens relative to the optical axis.

Abstract: A multi-lens camera module comprises at least two lens modules located side-by-side. Each lens module can be a voice coil motor (VCM) lens module having an auto-focusing (AF) or/and an optical image stabilizer (OIS) functions. The surface where two lens modules are adjacent with is called the neighbouring surface. A projection view on the neighbouring surface of a plurality of secondary driving magnets of these lens modules located at two sides of the neighbouring surface includes at least one secondary driving magnet which has two opposite edges with unequal length; in addition, shapes of these two opposite edges include at least one of the following: slope, arc and straight line. These secondary driving magnets are arranged across the neighbouring surface in a staggered manner.

Abstract: A fixing member adapted to fix a first optical member and a second optical member is provided, the fixing member is disposed between a first module and a second module. The fixing member includes a frame body, a first fixing structure and a second fixing structure. The frame body is fixed to the first module. The first fixing structure is connected with the frame body and configured to fix the first optical member to the first module. The second fixing structure is connected with the frame body and configured to fix the second optical member to the second module. A projector comprising the fixing member above is further provided.

Abstract: An imaging device includes a base, a prism module, a lens module and an imaging module. The prism module is fixedly disposed in the base. The lens module includes a lens unit, a first carrier configured to fix the lens unit, and a second carrier configured to accommodate the first carrier, wherein the lens unit has an optical axis extending in a first direction, the second carrier is connected to the base through an axial elastomer extending in the first direction, and the prism module and the lens module are disposed in the base and sequentially arranged in the first direction.

Abstract: A lens apparatus includes a lens, a first base member, and a holding frame configured to hold the lens, the holding frame including a flange surface that intersects with an optical axis of the lens. The first base member has a first slope having an acute angle to the flange surface, and the holding frame is fixed to the first base member by adhesive provided between the first slope and the flange surface.

Abstract: An optical filter switch module including a housing assembly and an optical filter switch is provided. The housing assembly includes a first housing and a second housing. The first housing has a first through hole extending along an axis. The second housing is disposed in the first housing along the axis and partially embedded in the first housing. The second housing has a second through hole corresponding to the first through hole. A thermal expansion coefficient of the first housing in the direction along the axis is smaller than a thermal expansion coefficient of the second housing in the direction along the axis. The optical filter switch is disposed on the second housing and partially corresponds to the position of the second through hole. A lens assembly having the optical filter switch module is further provided.

Abstract: A lens moving apparatus, including a cover can; a base disposed below the cover can; a bobbin disposed in the cover can; a coil provided at an outer surface of the bobbin; a driving magnet facing the coil and disposed in the cover can; a sensing magnet coupled to the bobbin; and a sensing unit coupled to a circuit board and facing the sensing magnet. In addition, the coil is disposed between the sensing magnet and the driving magnet.

Abstract: An optical device includes an optical system including a plurality of lens groups, at least one lens group being a movable lens group moving in an optical axis direction, and a movable frame to move the movable lens group. The movable frame includes a driving source, a drive screw, a lens supporting frame, and maintaining an integrated state relative to the movable lens group, a plurality of arms disposed in a position to face the drive screw and being openable and closable relative to the drive screw with a single opening and closing axis as a support axis, the plurality of arms including a first arm and a second arm, and a biasing spring configured to apply a biasing force to the first arm in a direction in which the first arm approaches the drive screw, wherein the lens supporting frame is further configured to support the biasing spring.

Abstract: A mounting assembly for an optical video system may include a platform having a track extending longitudinally along the platform. A camera mount may be slideably coupled to the track. A camera may be coupled to the camera mount. The camera may include a receptacle for engaging an interchangeable lens assembly. The mounting assembly for the optical video system may also include a biasing mechanism, wherein the biasing mechanism urges the camera mount along the track such that the receptacle engages the interchangeable lens assembly.

Abstract: A camera module includes an optical package, a camera actuator for moving the optical package, a camera subassembly, and one or more resilient members arranged within the camera subassembly to prevent, reduce, or cushion contact between the optical package and other components of the camera. The resilient members may be mounted on the lens carrier of the optical package and configured to come into resistive contact with components of the camera subassembly and/or mounted on components of the camera subassembly and configured to come into resistive contact with the optical package. In either case, the resistive cushioning provided by the resilient members may reduce or prevent contact (and an associated rattling noise associated with the contact) between the optical package and the hard components of the camera subassembly. The resilient members may be configured to cushion, but also allow hard stop contact. In embodiments bumpers (e.g., elastomeric pads) may be used.

Abstract: To realize weight reduction and ensure favorable performance of an imaging element. A lens barrel of a medical observation device includes: a barrel unit including an imaging optical system configured to acquire an image of an object, and a housing in which the imaging optical system is disposed; and an element unit including an imaging element configured to photoelectrically convert the image of the object acquired by the imaging optical system, and an element holder configured to hold the imaging element, in which the housing is made of a resin material, and the element holder is made of a material different from that of the housing. With this configuration, the housing in which the imaging optical system is disposed is made of the resin material, and the element holder configured to hold the imaging element is made of the material different from that of the housing. Thus, weight reduction can be realized while favorable performance of the imaging element can be ensured.

Abstract: Biological navigation devices and methods are disclosed. The devices can be used as or to support colonoscopies or endoscopes. The devices can have longitudinally extensible cells that can be selectively inflated. The devices can have articulable links. The devices can be removably attached to elongated elements, such as colonoscopes or other endoscopes.

Abstract: A lens unit includes a first lens array including a plurality of first lens elements. The first lens array satisfies D1?0.25·P1 where P1 is a pitch in a first direction between optical axes of adjacent ones of the first lens elements, and D1 is a displacement amount that is an absolute value of a difference between a first length WE1 from a center position of the first lens array to an end position of the first lens array in the first direction at a first temperature, and a second length WE2 from the center position of the first lens array to the end position of the first lens array at a second temperature higher than the first temperature by 30° C.

Abstract: A camera device includes a housing, a mounting barrel for mounting a camera lens, a supporting member, elastic members, a rotating ring, and a driving motor. The housing has a protrusive limiter disposed thereon. The mounting barrel has a ring-shaped flange disposed on an exterior peripheral face thereof. The central axes of the mounting barrel and the rotating ring forms an angle such that the mounting barrel is inclined with respect to the rotating ring. The plural elastic members being arranged around the ring-shaped flange. The driving motor is connected to the rotating ring in a transmission way for driving rotation of the rotating ring. The rotating ring has a protruding member disposed thereon and the protruding member rotates along with the rotating ring. The protruding member abuts on the ring-shaped flange.

Abstract: Examples are disclosed herein that relate to linear magnetic actuators in camera devices. One example provides a camera device comprising an optical sensor, a lens positioned a variable distance away from the optical sensor, a linear magnetic actuator having a coil and a magnet configured for linear relative movement upon driving of current, and an actuator coupling structure. The actuator coupling structure couples the linear magnetic actuator to the lens, such that the lens moves in response to the movement of the linear actuator.

Abstract: A suspension assembly for a camera lens element includes a support member with a wire attach structure and a moving member coupled to the support member. The moving member includes a plate, flexure arms extending from the plate and coupled to the support member, and a wire attach structure. A bearing supports the plate of the moving member for movement with respect to the support member. A shape memory alloy wire is coupled to and extends between the wire attach structures of the support member and the moving member. The limiter limits a range of movement of the moving member with respect to the support member, and in embodiments includes an opening in one of the moving member plate and the support member, and a stop that includes an engagement portion extending into the opening in the other of the moving member plate and the support member. The opening has a first diameter, and the engagement portion has a second diameter that is less than the first diameter.

Abstract: Disclosed herein is a camera lens module. The camera lens module in accordance with an embodiment of the present invention includes a vibration correction carrier, a rolling unit disposed in parallel to a direction vertical to an optical axis and configured to support the vibration correction carrier, a lens barrel carrier disposed on a side opposite the vibration correction carrier based on the rolling unit, and a base configured to mount the vibration correction carrier and the lens barrel carrier on the base.

Abstract: When a plurality of opening units is provided for each lens unit in order to adjust the inclination and eccentricity of a lens unit, the design of an imaging device may be constrained and the size of an imaging device may increase. In order to prevent this constraint, provided are a lens barrel, an imaging element support structure, and an electronic viewfinder that may adjust the inclination and eccentricity of a lens unit by using an insertion unit including an eccentric cylinder unit and a frame support unit including a through hole including a plurality of openings having different opening widths.

Abstract: An optical unit with a shake correction function may include a unit with a swing mechanism having an optical module and a swing drive mechanism structured to swing the optical module, a rolling drive mechanism including a magnetic drive mechanism structured to turn the unit with the swing mechanism in a direction different from a swing direction by the swing drive mechanism, a connection member which connects the unit with the swing mechanism with a turning shaft of the rolling drive mechanism, and a support member which supports the rolling drive mechanism. The connection member includes an abutting part integrally turned with the unit with the swing mechanism and the support member includes a position restriction part which restricts a movable range of the abutting part.

Abstract: A lens drive apparatus that displaces a lens holder in a direction of an optical axis and a direction orthogonal to the optical axis comprises: a drive section that displaces an assembly, which is formed by assembling a lens holder displaceable in the direction of the optical axis together with a plurality of magnets disposed around the lens holder, in the direction orthogonal to the optical axis by the plurality of magnets and a plurality of coils disposed at positions facing the magnets in collaboration with each other, wherein the plurality of coils include two coils placed side by side with respect to a same magnet.

Abstract: A camera device is proposed. The camera device includes a housing, a mounting barrel for mounting a camera lens, a supporting member, elastic members, a rotating ring, and a driving motor. The housing has a protrusive limiter disposed thereon. The mounting barrel has a ring-shaped flange disposed on an exterior peripheral face thereof. The central axes of the mounting barrel and the rotating ring forms an angle such that the mounting barrel is inclined with respect to the rotating ring. The plural elastic members being arranged around the ring-shaped flange. The driving motor is connected to the rotating ring in a transmission way for driving rotation of the rotating ring. The rotating ring has a protruding member disposed thereon and the protruding member is rotated along with the rotating ring. The protruding member is abutted on the ring-shaped flange.

Abstract: A military projector comprises a tubular housing that contains a high intensity lamp, a reflecting mirror behind the high intensity lamp, a negative lens which is carried in a first mounting member located in front of the lamp, and a pair of positive meniscus lenses which axe mounted in a second mounting member spaced from and movable relative to the negative lens so that the distance between the negative and positive lenses can be varied. A carrier member having a clear opening and an opening containing a filter is located between the negative and positive lenses. A moving means moves the carrier member between a first position in which the light passes through the filter before reaching the positive meniscus lenses and a second position in which the light passes through the clear opening. An elongated tubular electromagnetic shield extends beyond the meniscus lenses.

Abstract: Determination of a maximum jetting frequency for an inkjet head. The method includes generating a velocity/frequency curve for an inkjet head, and determining failure zones in the velocity/frequency curve that comprise frequencies in the velocity/frequency curve resulting in jetting failure of the inkjet head. The method further includes determining a range of maximum jetting frequencies of the inkjet head that are higher than the frequencies of the failure zones, wherein subharmonic frequencies of each of the maximum jetting frequencies are outside of the failure zones. The method further includes selecting the maximum jetting frequency for the inkjet head from the range of maximum jetting frequencies.

Abstract: A stage lighting optical system includes a light source assembly from which condensed light can be emitted, an object assembly, and a zoom lens assembly, which are located in a same primary optical axis direction. Light from the light source assembly is cast by the object assembly and the zoom lens assembly. The object assembly includes an object for beam mode assembly and an object for gobo mode assembly that can be switched with each other and enter to the primary optical axis. The light source assembly can move forward or backward along the primary optical axis with respect to the object assembly. When the light source assembly moves forward to a first position with respect to the object assembly, the beam mode assembly is switched to the primary optical axis. When the object for beam mode assembly moves backwards to a second position with respect to the object assembly, the object for gobo mode assembly is switched into the primary optical axis.

Abstract: Embodiments provide a lens moving apparatus including a housing supporting a driving magnet and having an opening, a bobbin provided at an outer circumferential surface thereof with a coil located inside the driving magnet, the bobbin being moved in a first direction parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil, and a damper located between the housing and the bobbin.

Abstract: A system for parallax correction includes a rotatable focus adjuster having a longitudinal axis. A lens retainer is engaged with the focus adjuster. A first lens is housed within the lens retainer aligned with the longitudinal axis. A second lens is positioned parallel to the first lens within the lens retainer. The second lens is configured to move laterally with respect to the first lens to correct for parallax between the first and second lenses.

Abstract: In an image shake correction device in which a lens holder holding an image shake correcting lens is supported by a ball, the image shake correcting lens is driven in such a manner that the ball does not make sliding contact with the lens holder or does not contact a ball restriction portion during still image capturing. The image shake correction device permits the ball to contact the ball restriction portion during moving image capturing.

Abstract: Provided is a lens barrel which causes at least one lens to be movable in an optical axis direction. The lens barrel includes a first tube; a second tube that holds the lens and is movable relatively to the first tube in the optical axis direction; and either one of the first and the second tube includes a first and a second roller which contact with the other tube in a plane orthogonal to the optical axis direction, and the first roller and the second roller are rotable in accordance with the relative movement of the second tube and movable in a direction orthogonal to the optical axis direction at the time of the movement of the second tube. One tube includes a limiting member for limiting the movement of the second roller in the direction orthogonal to the optical axis direction and in a direction to the other tube.

Abstract: Embodiments provide a lens moving apparatus including a housing for supporting a first magnet, a bobbin including a coil disposed on an outer surface thereof and inside the first magnet so as to move in the housing in a first direction parallel to an optical axis by electromagnetic interaction between the first magnet and the coil, and upper and lower elastic members, each of which is provided at the bobbin and the housing and includes an inner frame coupled to the bobbin and an outer frame coupled to the housing, wherein at least one of the upper and lower elastic members is constituted by a printed circuit board.

Abstract: A lens drive apparatus that displaces a lens holder in a direction of an optical axis and a direction orthogonal to the optical axis comprises: a drive section that displaces a lens holder, displaceable in the direction of the optical axis, in the direction orthogonal to the optical axis in collaboration with a plurality of magnets and a plurality of coils disposed at positions facing the magnets, wherein the plurality of magnets include two magnets that are disposed at positions mutually shifted with respect to each other in the direction of the optical axis, and the plurality of coils include a coil disposed between the two magnets.

Abstract: A lens drive apparatus that displaces a lens holder in a direction of an optical axis and a direction orthogonal to the optical axis comprises: a drive section that displaces an assembly, which is formed by assembling a lens holder displaceable in the direction of the optical axis together with a magnet disposed around the lens holder, in the direction orthogonal to the optical axis by the magnet and a coil disposed at a position facing the magnet in collaboration with each other; and a Hall device that is disposed at a position shifted in the direction of the optical axis with respect to the magnet and detects a position of the magnet in the direction orthogonal to the optical axis.

Abstract: A lens module is disclosed. The lens module includes a lens barrel including a first barrel wall extended horizontally and a second barrel wall extended from the first barrel wall; a lens group including at least one lens, the lens includes a first slope; and a stop on the first barrel wall and forming a light hole for the lens. The first barrel wall of the lens barrel includes a second slope abutting against the first slope for ensuring the concentricity.

Abstract: A lens drive apparatus that displaces a lens holder in a direction of an optical axis and a direction orthogonal to the optical axis comprises: a drive section that displaces an assembly, which is formed by assembling a lens holder displaceable in the direction of the optical axis together with a magnet disposed around the lens holder, in the direction orthogonal to the optical axis by the magnet and a coil disposed at a position facing the magnet in collaboration with each other; and a Hall device that is disposed at a position shifted in the direction of the optical axis with respect to the coil and detects a position of the magnet in the direction orthogonal to the optical axis.

Abstract: [Object] To prevent the occurrence of stuck without increasing the number of components and also to restore thread engagement of a rack with a lead screw to a normal condition. [Solution] Provided is an optical pickup including: a light source; an objective lens; an optical element; and an optical element driving device.

Abstract: A lens drive apparatus comprises: an assembly that is formed by assembling a lens holder together with a magnet holder that holds a magnet; a first drive section that displaces the lens holder in a direction of an optical axis in collaboration with the magnet and a first coil; and a second drive section that displaces the assembly in a direction orthogonal to the optical axis in collaboration with the magnet and a second coil, wherein the magnet holder comprises a hollow part that accommodates the magnet at a position facing both of the first coil and the second coil.

Abstract: A lens barrel in which a lens can be moved in a direction parallel to an optical axis includes: a first frame having a cam follower and a cam follower base that holds the cam follower; and a second frame that has a cam groove engageable with the cam follower. The first frame and the second frame are moved relatively to each other along the optical axis. The cam follower base has a first end connected to the main body of the first frame via at least one thin portion, and a second end not connected to the main body. The thin portion is formed such that a thickness of the thin portion in a radial direction of the lens barrel is smaller than that of the cam follower base.

Abstract: An optical adjusting apparatus having an optical adjusting lens to perform image stabilization and auto focusing includes a base supporting a lens barrel on which the optical adjusting lens is mounted, a first driver to move the lens barrel in a first direction, a plurality of first ball bearings disposed between the base and the first driver, a second driver to move the lens barrel in a second direction that is perpendicular to the first direction, and a plurality of second ball bearings disposed between the first driver and the second driver.

Abstract: In some embodiments, a camera component includes an annular lens holder component having a threaded interior surface for translating rotational motion of an optics barrel component into motion along an optical axis of the optics barrel component. In some embodiments, the threaded interior surface of the lens holder component includes one or more threads complementary to one or more threads of a threaded exterior surface of an optics barrel component. In some embodiments, the optics barrel component is movably mounted on the threads of the threaded interior surface of the lens holder component for rotational motion within the lens holder component. In some embodiments, the optics barrel has a threaded exterior surface with one or more threads complementary to the threads of the threaded interior surface of the lens holder component. Some embodiments include a piezoelectric motor fixedly mounted to a base component.

Abstract: A lens barrel includes a fixed frame, a rotational frame, a first straight advance frame, a first lens retaining frame, and a first drive. The rotational frame engages with the fixed frame. The first straight advance frame engages with the rotational frame. The first lens retaining frame retains a first lens group and engage with the rotational frame. The first drive unit is attached to the first straight advance frame and drives rotationally the rotational frame around an optical axis. The first drive unit and the first straight advance frame move integrally with respect to the fixed frame in an optical axis direction according to a rotation of the rotational frame driven by the first drive unit. The first lens retaining frame further move with respect to the first straight advance frame in the optical axis direction, when the first straight advance frame moves such as above state.

Abstract: User-controllable defocus blur for a stochastic rasterizer may be implemented by modifying circle of confusion coefficients per vertex to express more general defocus blur. The method can be applied to limit the foreground blur, extend the in-focus range, simulate tilt-shift photography, and specify per-object defocus blur. Furthermore, with two simplifying assumptions, existing triangle coverage tests and tile culling tests can be used with very modest modifications.

Abstract: A lens apparatus includes a diaphragm unit that is driven in a first driving direction and a second driving direction, a driving unit that drives the diaphragm unit based on a driving instruction, a storage unit that stores a first driving instruction value for performing the driving in the first driving direction, and a second driving instruction value for performing the driving in the second driving direction, and a control unit that outputs a driving instruction for driving the diaphragm unit, wherein the control unit outputs, when driving the diaphragm unit in the first driving direction, the driving instruction based on the first driving instruction value or the like, and outputs, when driving the diaphragm unit in the second driving direction, the driving instruction based on the second driving instruction value or the like.

Abstract: A method for manufacturing a base structure of lens-focusing mechanism first prepares a conductive member having at least two conductive parts, interconnection part, contacts and two conductive pins. The conductive parts have proximity ends separated and staggered to each other. An insulating base is formed by injection molding and encapsulates the conductive member wherein the conductive pins, the interconnection part and the contacts are exposed out of the insulating base. The interconnection part is cut and then a spring member is mounted to the insulating base and electrically connected to the conductive pins through the contacts. The present invention can solve the problem of difficulty in assembling conductive pins and connecting the spring member for the insulating base. The conductive member is arranged within the insulating base such that plastic material can be saved, the flatness, the stability and the anti-damage ability of base can be enhanced.

Abstract: A lens barrel of the disclosure includes: a first frame which has a lens and an adhesive reservoir which is provided at a position projecting from the lens in a radial direction of the lens with an indentation formed between the lens and the adhesive reservoir, the first frame holding the lens by injection of an adhesive into the adhesive reservoir; and a second frame which is movable relative to the first frame in an optical axis direction of the lens, the second frame having a through hole formed at a place corresponding to the adhesive reservoir as viewed in the optical axis direction.

Abstract: A lens device includes a first barrel surrounding an optical axis, a first frame coupled rotatably to the first barrel and surrounding a first axis, and an adjusting unit. The adjusting unit has an adjusting groove formed in one of the first barrel and the first frame, and having adjusting groove segments, one of which extends spirally. The adjusting unit further has adjusting blocks formed on the other one of the first barrel and the first frame and engaging respectively and slidably the adjusting grooves. The first frame is rotatable relative to the first barrel to adjust the first axis relative to the optical axis.

Abstract: The lens holding structure of the disclosure includes a lens; and a holding frame including a seat surface and holding the lens, wherein an inclination in a yaw direction and an inclination in a pitch direction of the lens in a state where the lens is brought into contact with the seat surface are substantially equal to an inclination in a yaw direction and an inclination in a pitch direction of the lens in a state where the lens is held by the holding frame, and a clearance is formed between the lens and the seat surface.

Abstract: The disclosure relates to an optical device, in particular for microlithography. The optical device includes an optical module and a support structure that supports the optical module. The optical module includes an optical element and a holding device that holds the optical element. The holding device includes a deformation device having a plurality of active deformation units which contact the optical element and which are designed so as to impose a pre-defined deformation on the optical element. The optical module is fixed to the support structure in a replaceable manner.