Abstract: A projection apparatus includes a light source emitting an illuminating beam, a light valve receiving the illuminating beam to create an image beam, and a projection lens system arranged on a path of the image beam for receiving and projecting the image beam onto a screen. The projection lens system includes four lens elements arranged along the optical axis in order from the screen toward the light valve, namely, first, second, third and fourth lens elements respectively having positive, negative, positive and positive refractive power. The four-piece projection lens system satisfies the condition of 0.79<BFL/TL<0.99; where, BFL is the back focal length of the projection lens system, and TL is the overall length of the projection lens system on the optical axis from a screen side of the first lens element to a light-valve side of the fourth lens element.

Abstract: A projector apparatus comprises a light source lamp which is inside a reflector, a projection system forming a light figure using a light from the light source lamp, projecting the formed light figure by an optical lens unit having an automatic focus function and providing the image on a projection target position, a temperature sensor detecting the temperature of the light source lamp, a temperature sensor detecting the temperature of the optical lens unit, and a control unit moving the position of a focus lens of the optical lens unit in accordance with each detection result of the temperature sensors, thereby revising an image location set by the automatic focus function.

Abstract: A projector includes a projection optical device and a projection position adjusting device that includes a fixed member defining a hole having a step portion, a first plate that supports the projection optical device and a second plate disposed between the fixed member and the first plate. The projection position adjusting device further includes a connecting member having a step and being disposed in the hole of the fixed member and connected to the first plate, and an urging member disposed between the connecting member and the step portion of the hole of the fixed member. The urging member urges the step portion of the hole and the step of the connecting member away from each other, and urges the first plate into direct contact with the fixed member.

Abstract: Disclosed is a projection apparatus including: a video display control section 53 to project and display a video according to input video data; and a projection distance obtainment section 14 to irradiate to a projection plane where the video is projected with a laser and displayed by the video display control section 53, and to obtain a projection distance to the projection plane, wherein when the projection distance is obtained by the projection distance obtainment section 14, the video display control section 53 adjusts a display status of at least a first video area 66 corresponding to a laser ranging point 63 which is an area where the laser is irradiated to a display status for obtaining the projection distance so that the distance from the projection apparatus to the projection plane can be measured fast and with high accuracy.

Abstract: An imaging system (400) includes an imaging lens (116) prone to temperature changes which leads to changes in the imaging focus position of the imaging lens. A temperature sensor (404) configured to monitor the temperature of the imaging lens. An imaging lens adjustment element (120) attached to the imaging lens configured to adjust the setting of the imaging lens. A controller (104) configured to process temperature readings and adjust the position of the imaging lens by activating the imaging lens adjustment element.

Abstract: A projector includes a housing, a lens module pivotally connected to the housing, a first adjustment mechanism adjusting a pitch of the housing, and a second adjustment mechanism adjusting a pitch of the lens module. The first adjustment mechanism includes a threaded base fixed to the housing, and a support leg extending out of the housing and comprising a threaded portion. The second adjustment mechanism includes a first gear driven by the support leg, a second gear engaging the first gear, a first threaded member fixed to the second gear, a first connecting member pivotally connected to the lens module, a second connecting member slidably connected to the first connecting member, and a second threaded member. The second threaded member is fixed to the second connecting member, and threaded on and slidable relative to the first threaded member.

Abstract: A liquid crystal panel includes a liquid crystal display element, a micro-lens array, an adjustable lens array, and a lens control unit electrically connected to the adjustable lens array. The liquid crystal display element has a light input surface and a light output surface opposite to the light input surface. The micro-lens array has a plurality of micro-lenses disposed on the light input surface of the liquid crystal display element). The adjustable lens array has a plurality of adjustable lenses disposed on the light output surface of the liquid crystal display element. The lens control unit is capable of controlling focal lengths of the plurality of adjustable lenses.

Abstract: A projection type image display apparatus includes an image display element, and a projection optical unit, which is configured to project an image displayed on the image display element, enlargedly, upon a screen. The projection optical unit includes a lens group, which is configured to compensate an distortion on an image surface on the screen, a mirror for compensating a trapezoidal distortion on the screen. The mirror reflects lights emitted from the lens group, so as to project upon the screen obliquely.

Abstract: A projector includes a projector body, a lens module with a lens, and a gear module. The lens module and the gear module are arranged in the projector body. The gear module is operable to adjust a height of the lens and keep an angle of the lens, in response to the gear module being rotated.

Abstract: A projector includes a projector body, a lens module, and a base rack. The front panel of the projector body defines a though hole. The lens module includes a lens body rotatably mounted to the projector body, a sliding bracket, and a lens extending from the lens body to extend through the through hole of the projector body, and a sliding bracket connected to the lens body via parallel connecting poles. The sliding bracket is slidably mounted to the base rack. The base rack is rotatably mounted to the projector body. A height of the lens is operable to be adjusted by changing the positions of the sliding bracket on the base rack.

Abstract: A smooth picture device includes an optical element, a holder, a flexible member, a base and an actuator. The holder supports the optical element. At least one portion of the holder is coupled to the flexible member. The base supports the flexible member. The actuator is coupled to the holder and actuates the holder to vibrate.

Abstract: A projector includes: a lens position control unit which controls a projection position of an image by shifting a projection lens; a signal receiving unit which receives a position control start signal to start position control and a lens shift signal from a remote controller; a direction conversion memory unit which stores direction conversion information corresponding to the lens shift signal as information for performing a predetermined conversion of the shift direction of the projection lens; a shift direction converting unit which converts the shift direction of the projection lens based on the direction conversion information; a menu display unit which displays a direction conversion menu screen through which the direction conversion information is inputted; and a control unit which allows the menu display unit to display the direction conversion menu screen when a predetermined condition is satisfied at the time of reception of the position control start signal.

Abstract: An assembling mechanism for assembling a lens module of a projector to an optical engine base of the projector includes a supporting stage fixed to the optical engine base, a supporting flange fixed to the lens module, a first fastener fixed to the optical engine base, a second fastener selectively engaged with the first fastener and disposed on the lens module around an axis, a first electrical connector fixed to the optical engine base, and a second electrical connector selectively coupled with the first electrical connector and disposed on the lens module. When the supporting flange contacts against the supporting stage and then the second fastener is engaged with the first fastener, the displacement of the supporting flange along the axis and the rotation of the supporting flange about the axis relative to the supporting stage are limited, and the first electrical connector is coupled with the second electrical connector.

Abstract: A video projection device has one of a plurality of types of projection lenses replaceably loaded and projects a video on a screen at a fixed position. The video projection device includes: a converter lens which is composed of a plurality of lenses, which is afocal as a whole, and which is detachably provided in front of the projection lens to convert projection magnification; and a gap adjustment mechanism changing a predetermined gap in the converter lens to a setting in accordance with at least one of a projection distance to the screen and the type of the projection lens loaded.

Abstract: A projection-type image display apparatus for projecting an image, enlargedly, onto a projection surface, comprises: an image display element; a lens group, being disposed behind the image display element, comprising therein, a front lens group made up with a plural number of lenses, including, at least, a refractive lens, and a rear lens group made up with a plural number of lenses, including, at least, a lens having a free curved surface configuration and being rotationally asymmetric, thereby emitting an image displayed on the image display element; a reflection mirror for reflecting the light from the lens group, thereby projection onto the projection surface, obliquely; and a movement member for moving the plural number of lenses of the rear lens group.

Abstract: A projection type image display apparatus includes an image display element, a lens group disposed in a direction of propagation of light with respect to the image display element and being formed with a plural number of lenses, a s reflection mirror configured to reflect light emitted from the lens group thereon so as to project the light on a screen, obliquely, and a housing configured to receive the reflection mirror and the lens group therein. The lens group is fixed on a bottom portion of the housing, and a part of the lens group is configured to enable movement of lenses of the lens group.

Abstract: An image processing device for a projector including an image formation section that emits light of an image, and a projection system that projects the emitted light onto a projection surface. The image processing device has a distortion correction technique for images displayed on the projection surface. The image processing device has a target display area determination section that determines, in a display area serving as a reference on the projection surface, based on a current value of a parameter, any of target display areas set for values possibly taken by the parameter within an allowable range to be targeted on a distortion-free image for display on the projection surface; a reference formation area determination section that determines a reference formation area to be formed with a virtual distorted image and a correction application section that generates corrected image data for supply to the image formation section.

Abstract: A projection apparatus has a spatial light modulator to modulate illumination from a laser light source. A base projection lens has, from its long conjugate side to its short conjugate side, a first lens group with negative focal length and with a first lens element that has a negative focal length and a second lens element of positive focal length, a second lens group of negative focal length and spaced apart from the first lens group and having one or more cemented lens elements, and a third lens group spaced apart from the second lens group and having a lens with a positive focal length. The base projection lens has a first field of view and is telecentric in its short conjugate. An afocal attachment to the base projection lens alters the first field of view by the same amount in both of two orthogonal directions.

Abstract: A projection optical system including a projection lens, a first mirror that reflects a light from the projection lens, and a second mirror that widens an angle of a light from the first mirror by reflecting the light projects a light modulated according to an image signal from an optical engine unit. A third mirror reflects a light from the projection optical system. A screen transmits a light from the third mirror. An optical axis of the projection lens substantially matches an optical axis of the second mirror, and the light from the optical engine unit is shifted to a specific side from the optical axis of the projection lens.

Abstract: Focus adjustment for a projector which includes a projection lens having an adjustable focus position. An asymmetrically focused pattern is projected through the projection lens onto a projection screen, wherein the asymmetrically focused pattern is imaged by the projection lens onto the projection screen with a focus at one portion on the screen that differs with focus at another portion thereof. An image of the asymmetrically focused pattern is captured from the projection screen. A focus adjustment direction is calculated by using asymmetrical aspects of the captured image of the asymmetrically focused pattern. The focus position of the projection lens is driven in the calculated focus adjustment direction so as to move from an out-of-focus state of the projection lens toward an in-focus state.

Abstract: An optical device includes a lens, a horizontal transmission module, a vertical transmission module, a horizontal driving unit, a vertical driving unit, a horizontal orientation detector, a vertical orientation detector, a user interface, and a control unit. The horizontal driving unit moves the lens horizontally via the horizontal transmission module. The horizontal orientation detector can detect horizontal movement of the lens and emit a horizontal sensing signal. The vertical driving unit can move the lens vertically via the vertical transmission module. The vertical orientation detector can detect vertical movement of the lens and emit a vertical sensing signal. The user interface can generate an operation signal. The control unit can control movement of the lens according to the operation signal, the horizontal sensing signal, and the vertical sensing signal.

Abstract: A projector includes: a projection position adjusting device that adjusts a projection position of a projection optical device. The projection position adjusting device includes: adjusting and driving units that move a first moving plate and a second moving plate. The adjusting and driving unit include: a pair of worms that have a columnar shape and have threads on outer circumferences thereof; and a pair of sliders that are screwed in the pair of worms, respectively. The pair of worms are disposed to extend along the first direction or the second direction. One of the sliders engages with one of moving plates. Engaging structures including inclining engaging holes that extend in a direction crossing the direction in the plane orthogonal to the projecting direction and engaging projections inserted through the inclining engaging holes are provided in the other slider and the other moving plate.

Abstract: An adjustment module is capable of adjusting a position of a lens of a projector. The adjustment module includes a base, a first tray, a second tray, at least one guide roller, and at least one boundary constrainer. The first tray is slidably disposed on the base along a first axis. The second tray is slidably disposed on the first tray along a second axis substantially perpendicular to the first axis. The lens is fixed on the second tray. The guide roller is rotatably disposed on the second tray. The boundary constrainer is disposed on the base. The guide roller is capable of confining the lens within an image area of the lens by rotatably contacting the boundary constrainer.

Abstract: The disclosed embodiments relate to a system and method for optical calibration of a picture modulator. More specifically, there is provided a video unit (10) comprising a modulator (18) configured to modulate a projection lens assembly (16) between a first position and a second position, a photodiode assembly (22) configured to produce a first voltage corresponding to a first pixel pattern generated when the projection lens assembly (16) is in the first position and to produce a second voltage corresponding to a second pixel pattern when the projection lens assembly (16) is the second position, and a video control system (26) configured to adjust the location of the second position based on the first and second voltages.

Abstract: There is provided a projector unit which can facilitate the design of lenses and project a distortionless and clear image and which comprises a projection optical system in which an optical axis of a projection lens does not coincide with a center of a rectangular image plane of an optical modulator for forming a projected image which corresponds to an image that is projected onto a screen, wherein the optical modulator is disposed in such a manner as to be tilted so that the optical axis of the projection lens and a center normal of the image plane of the optical modulator intersect each other.

Abstract: A projector includes a casing, a light source disposed in the casing and capable of providing an illumination beam, a light valve disposed in the casing and capable of converting the illumination beam into an image beam, a lens disposed in the casing and adapted to project the image beam, and the lens collar module. The lens collar module includes a fitting part and a lens collar. The fitting part is formed on the casing, and has a fitting opening and a first bump. The lens collar has a fitting periphery and a second bump. The fitting periphery is fitted to the fitting opening, the lens collar is adapted to be rotated and translated relative to the casing along an axial direction. Engagement of the first bump and the second bump limits rotation and translation of the lens collar relative to the casing along the axial direction.

Abstract: A driving method of an optical actuator is applied to a projection system. The optical actuator includes a carrier, an optical element and an actuator component. The optical element is disposed at the carrier. The actuator component drives the carrier to rotate an angle. The driving method includes the steps of providing a driving signal having an initial section and a target section, and shifting the optical element between a position driven by the initial section and a position driven by the target section via the actuator component according to a first acceleration-deceleration section and a second acceleration-deceleration section. In addition, an optical actuator, a projection lens module and a projection system are also disclosed.

Abstract: A lens shift mechanism includes a projection lens drive unit, a vertical-horizontal limit sensor which detects that a projection lens apparatus reaches a limit in a shift range in vertical and horizontal directions, and a vertically-horizontally central sensor which detects that the projection lens apparatus reaches a central position in the shift range. The vertically-horizontally central sensor has a detection width having a central value at the central position. When a microcomputer automatically returns the projection lens apparatus to the central position within the shift range after a shift operation, the microcomputer shifts the projection lens apparatus in a forward direction directed from a position at a time point when automatic return is started toward the central position, and thereafter shifts the projection lens apparatus again in a backward direction by substantially half the detection width of the vertically-horizontally central sensor.

Abstract: A rotational member inhibitable from coming off a support member is obtained. This rotational member includes a rotational portion rotatably mounted on a support member, a pair of arcuate portions provided on a side of the rotational portion closer to the support member to extend from the rotational portion and opposed to each other and a hook portion so provided as to extend from a circumferential end of at least one of the pair of arcuate portions in an outward direction intersecting with a mounting direction for the rotational portion for engaging with the support member.

Abstract: A lens-shifting device including a base, two fixing rods, a sliding plate, a first and a second gear set is provided. The sliding plate is slidably mounted on the fixing rods via the fixing rods. A lens is fixed on the sliding plate and the sliding plate has a rack disposed on one side thereof. The first gear set has a first gear and a worm gear co-axial therewith. One of the fixing rods passes through the first gear such that the first gear and the worm gear may rotate relative to the fixing rod. The second gear set having a worm wheel and a second gear co-axial therewith is disposed between the fixing rod and the rack. The worm gear is for driving the worm wheel and the second gear is used for driving the rack such that the sliding plate moves relative to the fixing rods.

Abstract: A projection type image display apparatus includes a lens group, being disposed adjacent to an image display element, which is configured to include a plural number of lenses, and a mirror, which is configured to reflect emission lights from the lens group, so as to project upon the screen obliquely. A ratio (Lo/Lp) between a distance (Lp) from a center of the mirror up to the screen and a diagonal size (Lo) of the screen is at least 2.

Abstract: The current invention disclosure LED light has focus adjustable project means and the said project adjustable means can rotating around 360 degree along desired combination of x-axis, y-axis, z-axis and power by the said power source may power source can be selected from selected from any combination from wall out, battery, adaptor, transformer, chemical power source, water power source, solar power source, generator, or any storage energy devices from conventional market place available type. Furthermore, the said LED light has special project means which can change position, add, reduce, move out, replace the said project means to fit the said LED light compartment(s) in desired combination from the x-axis, y-axis, z-axis. The project means project the said display-unit(s) selected from film, LCD screen, indicia, time parts, stencil, characters to make image, time, message, advertisement or light beam with different clearance, sharpness, size, brightness etc.

Abstract: An illumination system includes a coherent light source providing an illumination beam, a light integrator positioned on a transmission path of the illumination beam, and a first actuator connected to the light integrator. The light integrator has a light entering end and a light exit end opposite to the light entering end, and the light entering end faces the coherent light source. The first actuator is capable of driving the light integrator to about a rotation axis perpendicular to a light axis of the illumination beam passing through the light integrator, so as to change a position at the light entering end entered by the illumination beam.

Abstract: A lens-adjusting module includes a base, a lens device, a second tray, and an adjusting device. The lens device includes a first tray and a lens being fixed to and contacting the first tray. The first and the second trays are movably disposed on and contact the base. The first tray is movably disposed on the second tray and located between the second tray and the base. The adjusting device includes a first lever and a second lever pivoted to the base. A part of the first lever and a part of the second lever are slidingly disposed on the first tray. The first lever rotates to drive the first and the second trays to move relatively to the base along a first axis. The second lever rotates to drive the first tray to move relatively to the second tray and the base along a second axis.

Abstract: An image processing apparatus includes a first image pick-up unit, a projecting unit that projects imaging light, an optical unit that transmits part of light entering from a first image pick-up direction and guides the part of the light to the first image pick-up unit while reflecting part of the imaging light projected from the projecting unit and outputting the reflected light in the first image pick-up direction, and reflects part of light entering from a second image pick-up direction and guides the part of the light to the first image pick-up unit while transmitting part of the imaging light projected from the projecting unit and outputting the part of the imaging light in the second image pick-up direction, and an attenuating unit that is movably placed between two positions.

Abstract: A projection module includes a base, a light source, a light valve, a lens module, and an adjustment module. The light source is disposed on the base and capable of providing an illumination beam. The light valve is disposed on the base and capable of converting the illumination beam into an image beam. The lens module is slidably disposed on the base and capable of projecting the image beam. The adjustment mechanism includes a rolling wheel and a slide pin. The rolling wheel is pivotably mounted to the base and includes a slide groove. The slide pin is fixed to the lens module and extends into the slide groove. The rolling wheel is capable of pivoting to drive the slide groove to pivot and the slide groove moves the slide pin to drive the lens module to move with respect to the base when the slide groove pivots.

Abstract: A host computer includes a host machine and a projector. The host machine has a keyboard. The projector is positioned about the keyboard and includes a projection lens. A using position of the projection lens is higher than a received position of the projection lens.

Abstract: A projection zoom lens includes: a first lens group that has a negative refractive power, is fixed when power varies, and has a focusing function; a second positive lens group; a third positive lens group; a fourth negative lens group; a fifth positive lens group; and a sixth lens group that has a positive refractive power, is fixed when power varies, and includes an aperture diaphragm arranged closest to a magnification side. The first to sixth lens groups are arranged in this order from the magnification side, and the second to fifth lens groups are moved when power varies. All lenses are single lenses. The ratio of the back focal length Bf of the entire system to the focal length f of the entire system at a wide angle end is more than 2.5. The Fno. is constant in the entire power variation range.

Abstract: Provided is a focus unit fastening device for a projector, in which a plurality of fastening portions for coupling a focus unit to the projector by pushing and inserting the focus unit into the projector are formed integrally with a main body housing and the focus unit. The focus unit fastening device includes a projector main body housing, a focus unit engaged to the main body housing, a first fastening portion provided on the main body housing and the focus unit to fasten the focus unit to the main body housing by pushing the focus unit in a first direction and to prevent the focus unit from moving in a second direction perpendicular to the first direction, and a second fastening portion provided on the main body housing and the focus unit to fasten the focus unit to the main body housing by pushing the focus unit in the first direction and to prevent the focus unit from moving in the first direction.

Abstract: Provided is a focus unit fastening device for a projector, in which a plurality of fastening portions for coupling a focus unit to the projector by pushing and inserting the focus unit into the projector are formed integrally with a main body housing and the focus unit. The focus unit fastening device includes a projector main body housing, a focus unit engaged to the main body housing, a first fastening portion provided on the main body housing and the focus unit to fasten the focus unit to the main body housing by pushing the focus unit in a first direction and to prevent the focus unit from moving in a second direction perpendicular to the first direction, and a second fastening portion provided on the main body housing and the focus unit to fasten the focus unit to the main body housing by pushing the focus unit in the first direction and to prevent the focus unit from moving in the first direction.

Abstract: An image projection apparatus is disclosed which is capable of correcting defocusing due to changes of the temperature of a projection lens, which are caused by various factors. The image projection apparatus includes an image-forming element which is illuminated with light from a light source, a projection lens which includes a focus lens and projects light from the image-forming element onto a projection surface, plural temperature detectors which are provided at positions different from each other in the image projection apparatus. The apparatus further includes a controller which controls the position of the focus lens on the basis of the detection results by the plural temperature detectors.

Abstract: Disclosed is a technique that prevents the inclination of a lens barrel in a downward direction and does not hinder a reduction in size. A pair of sliding portions that slides along slide shafts is provided on both sides of a plate-shaped flange in which an opening for attaching a lens barrel is provided. The sliding portions are formed at different heights. Circular through holes through which the columnar slide shafts pass are formed in the sliding portions to extend in the height direction. When the sliding portions slide along the slide shafts, the flange is shifted in the height direction. The lens barrel attached to the flange is shifted in the height direction together with the flange.

Abstract: A representative embodiment of the invention provides a projection system having a laser source that incorporates a tunable liquid lens and a spatial light modulator adapted to modulate light generated by the laser source to project an image on a viewing screen. The tunable liquid lens is adapted to vary focal length, alignment or position with respect to an optical element that is external to the lens, ability to diffuse light, and/or polarization rotation angle.

Abstract: A projection display apparatus is provided with a projection distance adjustment mechanism for adjusting a distance between a projection plane and an emitting position of projection light, and provided with a focus adjustment mechanism for making a focus adjustment of a projection image with respect to the projection plane. The focus adjustment mechanism is driven such that a projection image is properly focused onto the projection plane in accordance with the distance between the projection plane and the emitting position.

Abstract: A casing 20 of a mobile phone body is provided with a sub-liquid-crystal display panel 23, a projector lens 26, a light source 35 including an LED. The sub-liquid-crystal display panel 23 and the projector lens 26 are movable between a normal position contained within the casing 20 and a raised position raised from the normal position. The sub-liquid-crystal display panel 23 is fixed at the raised position roughly perpendicularly to the light axis Q between the-sub-liquid-crystal display panel 23 and the light source 35 so that the light axis of the projector lens 26 is substantially aligned with the light axis Q. The illumination light from the light source is set to be parallel rays.

Abstract: A projector assembly includes a multi-pixel frame projector that sequentially projects each pixel making up a frame to a viewing surface, a movement detector coupled to the projector to detect a physical movement of the projector, and a movement compensator coupled to the projector, the movement compensator operable to transmit a correction signal to the projector, the correction signal capable of causing the projector to compensate for the detected movement.

Abstract: A projection optical unit for a projection display apparatus, which displays an image upon a projection surface, obliquely, includes a front lens group disposed in a direction from an image display element to a projection surface, a rear lens group, and a reflection mirror formed so that a curvature of a portion for reflecting a light beam incident upon a lower end portion of the projection surface is larger than a curvature of a portion for reflecting a light beam incident upon an upper end of the projection surface. An optical axis of the front lens group and the rear lens group is more inclined with respect to a direction of the portion of the reflection mirror for reflecting the light beam incident upon the lower end portion of the projection surface than a normal line direction of the image display element.

Abstract: Provided is an image display apparatus which can reduce the influence of image quality degradation caused by a spot size on a screen generated when using a light source having a high directivity such as a laser beam and scan-type image formation means. The image display apparatus includes: a light source device (10) which emits light; scan-type image formation means (such as an MEMS mirror (14)) which forms an image on a screen (15); a variable focus device (13) arranged in the optical path of the light emitted from the light source device (10) to reach the image formation means; and control means which controls the variable focus device (13) so as to modify the spot size of the light beam projected onto the screen (15) in accordance with a projected image size or an user operation.

Abstract: A lens mounting plate to which a projection lens unit is fixed is brought into contact with a sliding base. The lens mounting plate is pressed against the sliding base by the urging of a coiled spring. The pressing force is set such that the position of the projection lens unit can be held and shifted. A cover is provided with a pipe-shaped projection so as to surround the projection lens unit with a clearance corresponding to the shifting width of the projection lens unit between the pipe-shaped projection and the projection lens unit. A user shifts the position of the projection lens unit with his or her fingers laid on the pipe-shaped projection and the projection lens unit.

Abstract: When an attempt to move a projection lens in a horizontal direction (crosswise) in a state where it is positioned on the upper or lower side is made, it can be moved in the horizontal direction (crosswise) up to a certain range. However, a movement restraining convex area in a vertical movable base finally comes into contact with the corner inclined at an angle of 45 degrees in a fixed base. After this contact, movement in a leftward or rightward direction and an upward or downward direction which are limited directions is limited. Even if a dial and a dial are rotated in the limited directions under the limitation of the movement, they are slipped, thereby making it possible to prevent a force from being forcedly applied to a driving mechanism.