JP2005195702A - Lens barrel support device and projector apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel support device which can readily improve the moving precision of a lens barrel. <P>SOLUTION: A member 32, to be moved with the barrel 11 attached thereto, is supported by a fixed member 31 so as to be movable in the vertical and horizontal directions, crossing the optical axis. By passing through the member 32, moving means 33a, 33b sandwiching both sides of virtual lines L1, L2 which pass through the center of gravity G of the member 32 and run along the moving direction of the member 32 makes an external force act on the member 32, rotation of themember 32 with respect to the moving direction around the center of gravity G is prevented, to easily improve the movement accuracy of the barrel 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lens barrel support device that supports a lens barrel movably along a direction intersecting an optical axis with respect to an optical apparatus main body, and a projector apparatus including the same.

  2. Description of the Related Art Conventionally, for example, a projector device that modulates a light beam emitted from a light source with a liquid crystal panel and projects the light onto a screen via a lens of a lens barrel is known. Therefore, a lens barrel support device that supports the lens barrel so as to be movable (shifted) in a horizontal direction and a vertical direction orthogonal to the optical axis is used.

This type of lens barrel support device includes a mount portion that supports the lens barrel, and a feed screw that moves the mount portion linearly along a direction perpendicular to the optical axis to the side of the mount portion. A gear train using a mechanism or a rack and a pinion is provided along the vertical direction (see, for example, Patent Document 1).
JP 2002-206615 A (FIGS. 2 and 7)

  However, in the above-described lens barrel support device, the external force that moves the lens barrel via the mount portion is biased toward the moving direction with respect to the center of gravity of the lens barrel, that is, the mount portion has a center of gravity relative to the center of gravity of the mount portion. While acting only on one side with respect to the center line along the moving direction, the gear train is provided with a slight gap, i.e., ratchet, at a place where the rotation is converted into a vertical movement in order to make the rotation smooth. There is a need.

  For this reason, when the lens barrel is moved, there is a problem that the mount portion rotates around the center of gravity together with the lens barrel in a plane orthogonal to the optical axis.

  Further, when an external force due to vibration or the like is applied to the lens barrel, there is also a problem that the position of the optical axis is shifted due to the movement of the lens barrel.

  Therefore, a guide shaft is provided along the moving direction of the mount portion, and a sleeve for guiding the guide shaft is provided, and the fitting accuracy between the guide shaft and the sleeve is improved to prevent the lens barrel from rotating. However, in order to improve the accuracy of the fitting between the guide shaft and the sleeve, it is necessary to improve the processing accuracy of the parts, so it is not easy to suppress the manufacturing man-hours or the manufacturing cost.

  SUMMARY An advantage of some aspects of the invention is that it provides a lens barrel support device capable of easily improving the movement accuracy of the lens barrel and a projector device including the lens barrel support device.

  The lens barrel support device according to claim 1 is a lens barrel support device that supports the lens barrel movably along a direction intersecting the optical axis with respect to the optical apparatus main body, and to which the lens barrel is attached. A member, a fixed member that supports the member to be moved so as to be movable along a direction intersecting the optical axis, and both sides sandwiching an imaginary line that passes through the center of gravity of the member to be moved and follows the direction of movement of the member to be moved. And a moving means for moving the moved member relative to the fixed member by applying an external force to the moved member.

  The moving member to which the lens barrel is attached is supported by the fixed member so as to be movable along the direction intersecting the optical axis, and an imaginary line passing through the center of gravity of the moving member and along the moving direction of the moving member. Since the moving means applies an external force to the member to be moved on both sides of the sandwiched member to move the member to be moved with respect to the fixed member, the member to be moved is prevented from rotating about the center of gravity with respect to the moving direction. It becomes possible to easily improve the movement accuracy of the cylinder.

  According to a second aspect of the present invention, there is provided the lens barrel support device according to the first aspect, wherein the moving means includes a rotation shaft provided on the fixed member and disposed along a direction intersecting the optical axis, A swinging member that is provided integrally with the moving shaft, swings along the circumferential direction of the rotating shaft as the rotating shaft rotates, and contacts the moved member along the swinging direction. It is what.

  Then, a swinging member is provided integrally with the rotating shaft provided along the direction intersecting the optical axis provided on the fixed member, and swings along the circumferential direction of the rotating shaft as the rotating shaft rotates. Since the swinging member abuts on the moved member along the swinging direction, the moving means can be realized with a relatively simple configuration and space can be saved.

  According to a third aspect of the present invention, there is provided the lens barrel support device according to the second aspect, wherein the moving means are arranged in pairs so that the rotation axes are respectively along two directions substantially orthogonal to each other. The moving member and the moved member are each provided with an abutting portion arranged along the moving direction of the moved member by the other swinging member.

  Then, the moving means are arranged in pairs so that the rotation shafts are along two directions substantially orthogonal to each other, and the movable member is moved by the other oscillating member to each oscillating member and the movable member. By disposing the contact portion along the direction, it is possible to guide the movement of the member to be moved by the contact portion.

  According to a fourth aspect of the present invention, there is provided the lens barrel support device according to any one of the first to third aspects, further comprising an elastic member that urges the movable member against the fixed member.

  Then, by urging the movable member with the elastic member with respect to the fixed member, it is possible to prevent the movable member from unexpectedly moving due to an external force due to vibration or the like or dropping downward due to its own weight.

  According to a fifth aspect of the present invention, there is provided a projector apparatus comprising: a light source; a light modulating unit that modulates a light beam emitted from the light source; a lens barrel that projects the light beam modulated by the light modulating unit; an optical device main body; The lens barrel support device according to any one of claims 1 to 4, wherein the lens barrel is movably supported with respect to an apparatus main body.

  And it becomes possible to improve the movement precision of a lens-barrel by supporting a lens-barrel with respect to an optical equipment main body by the lens-barrel support apparatus as described in any one of Claims 1 thru | or 4.

  The projector device according to claim 6 is a light source, a light modulation unit that modulates the light beam emitted from the light source, a lens barrel that projects the light beam modulated by the light modulation unit, a main body of the optical device, and the optical device. 5. The lens barrel support device according to claim 2, wherein the lens barrel is movably supported with respect to the apparatus main body, and a rotation axis of the lens barrel support device. A first gear having a pitch to the optical device, a rotation operation means that is rotatably provided and protrudes along a protruding direction of the lens barrel with respect to the optical device main body, and the rotation of the rotation operation means to the first gear. And a second gear for transmission.

  Further, by supporting the lens barrel movably with respect to the optical apparatus body by the lens barrel support device according to any one of claims 1 to 4, the movement accuracy of the lens barrel is improved, and the moving means is relatively simple. In addition to being realized with the configuration and being able to save space, by providing rotation operation means for transmitting rotation to the first gear via the second gear, the lens barrel can be operated by operating the rotation operation means. It can be easily moved. Further, the overall size can be reduced by projecting the rotation operation means along the projecting direction of the lens barrel with respect to the optical device main body.

  According to the lens barrel support device and the projector device of the present invention, the moving member can be prevented from rotating around the center of gravity with respect to the moving direction, and the moving accuracy of the lens barrel can be easily improved.

  Hereinafter, the configuration of a projector apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  In FIG. 5, reference numeral 1 denotes a projector device. The projector device 1 includes a housing 2 as an optical apparatus body, a light source 3 that irradiates light to the housing 2, and light modulation that modulates the light emitted from the light source 3. Means 4, an illumination optical system 5 that guides the light emitted from the light source 3 to the light modulation means 4, a projection optical system 6 that projects the light modulated by the light modulation means 4 onto a screen (not shown), and an exterior housing these The liquid crystal projector includes a case 7.

  The light source 3 is an incandescent bulb such as a halogen lamp or a discharge lamp such as a metal halide lamp.

  The light modulation means 4 is composed of, for example, three LCD panels Lr, Lg, and Lb, and these LCD panels Lr, Lg, and Lb are transmissive liquid crystal display elements that are display devices.

  The illumination optical system 5 includes two dichroic mirrors D1 and D2, a plurality of reflecting mirrors M, a lens (not shown), and the like.

  The projection optical system 6 includes a dichroic cross prism DXP, a lens barrel 11 that is a lens barrel, and a lens barrel support device 12 that supports the lens barrel 11 movably with respect to the housing 2.

  A power supply device, a fan, a control device, and the like (not shown) are accommodated in the outer case 7 and a display device and an operation device are respectively attached thereto.

  The light emitted from the light source 3 is color-separated into red (R), green (G), and blue (B) color light by two dichroic mirrors D1 and D2 via the illumination optical system. Incident on Lr, Lg, and Lb. Each LCD panel Lr, Lg, Lb modulates incident color light according to a video signal processed by a video signal processing circuit or the like. Further, the modulated color light is color-combined by the dichroic cross prism DXP, and a color image is projected onto the screen via the lens barrel 11.

  Hereinafter, the lens barrel 11 and the lens barrel support device 12 will be described. The screen side is the front side and the light source 3 side is the rear side along the optical axis O of the light beam directed from the light source 3 to the screen. Further, according to the normal installation state of the projector device 1, as viewed from the light source 3 side, A direction intersecting or orthogonal to the direction along the optical axis O is a vertical direction (up and down direction) V, and a direction perpendicular to the direction along the optical axis O and the vertical direction V is a horizontal direction (left and right direction) H. Will be described.

  As shown in FIGS. 1, 3, and 4, the lens barrel 11 includes a cam cylinder and a guide cylinder formed of, for example, an aluminum alloy, and a plurality of the cylinders 11 supported on the inside by rotating these cylinders. The lens position is moved along the optical axis O, and zoom adjustment and focus adjustment of the image are performed.

  Further, in the vicinity of the rear end portion of the lens barrel 11, a rectangular frame-shaped flange portion 21 as an attachment portion is provided projecting on the outer peripheral side. Further, circular mounting holes 22 are formed in the vicinity of the four corners of the flange portion 21, and screws 23 as fixing tools are respectively inserted into the mounting holes 22 from the front side.

  The lens barrel support device 12 includes a fixing member 31 attached to the housing 2 and a movable member 32 that is supported by the fixing member 31 so as to be movable along the direction intersecting the optical axis O and to which the lens barrel 11 is attached. And moving means for moving the moved member 32 relative to the fixed member 31 having moving means 33a and 33b arranged in a pair along the horizontal direction H and the vertical direction V which are two directions substantially orthogonal to each other. And 33.

  The fixing member 31 supports the moving member 32 so as to be movable in the vertical direction V and the horizontal direction H intersecting the optical axis O. The fixing member 31 is combined with the fixing base 41 and fixed with a screw 42 or the like. And a lid 43 to be used.

  The fixed base 41 includes a substrate portion 45 made of, for example, resin. Attachment portions (not shown) such as screw holes to be fixed to the housing 2 are formed at upper and lower ends of the substrate portion 45, respectively.

  Side wall portions 46 and 47 are provided on the left and right sides of the rear portion of the substrate portion 45 along the vertical direction V over the entire upper and lower portions of the substrate portion 45. In addition, a lower wall portion 48 protrudes rearward from the lower end portion of the rear portion of the substrate portion 45. The lower wall portion 48 is provided over the entire left and right sides of the substrate portion 45 along the horizontal direction H, and is continuous with the lower end portions of the side wall portions 46 and 47, respectively. In addition, an upper wall portion 49 projects rearward from the upper end portion of the rear portion of the substrate portion 45. The upper wall portion 49 is provided at the left and right central portions of the substrate portion 45 along the horizontal direction H. The wall portions 46, 47, 48, and 49 form a fitting space portion 50 in which the moved member 32 is fitted to the rear portion of the substrate portion 45.

  Further, a polygonal insertion hole 55 is drilled along the optical axis O in the center of the substrate portion 45, and the optical end of the lens barrel 11 is inserted into this insertion hole 55, or a light beam passes therethrough. It is supposed to be. Furthermore, moving means 33a and 33b are attached to the lower end portion and one side portion (right side shown in FIG. 1) of the insertion hole 55, respectively. These moving means 33a and 33b are rotatably attached to the front side of the fixed base 41 by a backing plate 57 fixed to the front side of the substrate part 45 with a screw 56 and the front side of the substrate part 45, and a part thereof. It protrudes into the fitting space 50.

  On the side wall portion 47 side, which is one side portion of the front side of the substrate portion 45, fitting recesses 61 and 62 into which a part of each of the moving means 33a and 33b are fitted are formed by notches. The fitting recesses 61 and 62 are arranged along the vertical direction V, and are spaced apart from each other above and below the substrate portion 45. And the rotation operation means 63 is attached to these fitting recessed parts 61 and 62, respectively.

  On the other hand, the lid body 43 is formed of, for example, a substantially rectangular metal plate, and is formed in a square frame shape with an insertion hole 65 into which the rear end portion of the lens barrel 11 is inserted at the center. ing. In addition, attachment holes 66 are formed in the four corners of the lid 43, respectively. Further, fitting holes 67 are formed in the vicinity of both side portions of the lid body 43, respectively. The lid body 43 is a screw inserted into the mounting holes 66 from the rear side by fitting the fitting protrusions 68 projecting from the rear portions of the side wall portions 46 and 47 of the fixed base 41 into the fitting holes 67, respectively. The lid 43 is attached to the fixed base 41 so as to cover the fitting space 50 by screwing 42 into the screwing hole 70 of the fixed base 41. Then, with the lid 43 attached to the fixed base 41, the lid 43 faces the substrate portion 45 of the fixed base 41 in parallel with each other at a predetermined interval.

  The moved member 32 includes a shift base 71. The shift base 71 is formed, for example, in a substantially square shape with a synthetic resin, and is slidably disposed in the fitting space portion 50 between the fixed base 41 and the lid body 43. A lens barrel mounting portion 72 is formed on the front surface of the center portion of the shift base 71. The lens barrel mounting portion 72 includes a recessed fitting portion 73, a circular hole-like insertion portion 74 located in the fitting portion 73, screw holes 75 located near the four corners, and left and right screw holes. An alignment projection 76 for alignment is provided in the vicinity of 75. Then, the alignment protrusion 77 is fitted into the alignment hole 77 formed in the flange portion 21 of the lens barrel 11, the flange portion 21 is fitted into the fitting portion 73, and the rear end portion of the lens barrel 11 is fitted. The lens barrel 11 is integrally fixed to the shift base 71 by inserting into the insertion portion 74 and screwing the screw 23 inserted from the front side into the mounting hole 22 of the flange portion 21 into the screw hole 75 and tightening. Then, the tip end portion of the screw 23 screwed into the screw hole 75 is fitted into a cutout recess 78 formed by cutting out at the four corners of the insertion hole 65 of the lid body 43.

  In addition, on the front surface of the shift base 71, circular hole-shaped fitting hole portions 81 are provided in the vicinity of the four corners. The fitting holes 81 are fitted with elastic members 82 for urging the movable member 32 against the lid 43 of the fixed member 31, respectively. These elastic members 82 include a spring 83 as an elastic body and a cap-like friction body 84 fitted to the spring 83. These elastic members 82 hold the spring 83 between the friction body 84 and the fitting hole 81, thereby pressing the moved member 32 to the rear side that is the lid body 43 side. Due to the frictional force between 84 and the fixed base 41 and the frictional force between the shift base 71 and the front surface of the lid 43, the movable member 32 against the fixed member 31 resists the weight of the lens barrel 11 and the fixed base 41. The position is maintained.

  Further, the shift base 71 is provided with guide contact holes 87 as a pair of contact portions at positions corresponding to the respective moving means 33, that is, at the lower end portion and one side portion of the shift base 71, respectively. . These guide contact holes 87 are each formed in a square hole shape, the guide contact holes 87a are along the horizontal direction H that is the left-right direction of the shift base 71, and the guide contact holes 87b are the upper and lower sides of the shift base 71. Each has a longitudinal direction along a vertical direction V which is a direction. The guide contact holes 87a are spaced apart from each other in the horizontal direction H, and are arranged on substantially the same straight line along the horizontal direction H, which is the moving direction of the moved member 32. Further, the guide contact holes 87b are spaced apart from each other in the vertical direction V, and are arranged on the substantially same straight line along the vertical direction V.

  As shown in FIGS. 1 and 2, the moving means 33a and 33b include an elongated columnar rotating shaft 91 and a swing arm as a pair of swinging members provided integrally with the rotating shaft 91. 92 and 92, respectively.

  The rotating shaft 91 is formed of, for example, a metal member, the rotating shaft 91a of the moving means 33a is disposed along the horizontal direction H, and the rotating shaft 91b of the moving means 33b is disposed along the vertical direction V. Are arranged along a direction intersecting the optical axis O. In other words, the rotation shafts 91a and 91b are arranged in a positional relationship that three-dimensionally intersects the optical axis O. Accordingly, the rotation shaft 91 is disposed along two directions that are substantially orthogonal to each other.

  Each swing arm 92 swings along the circumferential direction of the rotation shaft 91 as the rotation shaft 91 rotates, and abuts on the moving member 32 along the rotation direction. It has a swing arm 92a attached to the moving shaft 91a and a swing arm 92b attached to the rotating shaft 92b. Further, each swing arm 92 is provided with a mounting base end portion 93a attached to the rotation shaft 91, a projecting portion 93b projecting from the mounting base end portion 93a, and a projecting portion at the distal end portion of the projecting portion 93b. Each of them includes a swing contact portion 93c as a contact portion, and is formed in a longitudinal shape along the axial direction of the rotation shaft 91. The swing arms 92 are integrally attached to each other while being separated from each other in the axial direction of the rotation shaft 91.

  The attachment base end portion 93a is formed in a substantially cylindrical shape coaxial with the rotation shaft 91, and the rotation shaft 91 is inserted through the center thereof, and is formed integrally with the rotation shaft 91.

  The protruding portion 93b protrudes from the mounting base end portion 93a along the direction substantially orthogonal to the axial direction of the rotating shaft 91, that is, along the radial direction of the rotating shaft 91.

  The swing contact portion 93c is formed in a substantially cylindrical shape whose axial direction is parallel to the attachment base end portion 93a. That is, the swing contact portion 93c is formed in a longitudinal shape along the axial direction of each of the rotation shafts 91a and 91b. Then, the swing contact portion 93c of each moving means 33a, 33b protrudes into the fitting space 50 with the moving means 33a, 33b attached to the fixed base 41, and the longitudinal direction of the guide contact holes 87a, 87b Are fitted together.

  Further, the swing arm 92 is formed so that the longitudinal dimension and the width dimension are smaller than the longitudinal dimension and the width dimension of the guide contact hole 87, respectively. Each swing arm 92a, 92b passes through the center of gravity G of the movable member 32 to which the lens barrel 11 as the center of gravity of the moved member 32 is attached by swinging about the rotation shaft 91. The external force is applied to both sides of the virtual lines L1 and L2 along the vertical direction V and the horizontal direction H, that is, the left and right sides and the upper and lower sides shown in FIG.

  The rotation operation means 63 includes a rotation operation means 63a for operating the moving means 33a and a rotation operation means 63b for operating the moving means 33b. These rotation operation means 63a and 63b are provided with a rotation shaft 95, which meshes with a worm wheel 96 as a first gear provided on the rotation shaft 91 of each movement means 33a and 33b. Thus, a worm 97 as a second gear constituting the worm gear is integrally provided. Further, these rotation operation means 63a and 63b are provided with an attachment plate 98 through which the rotation shaft 95 is inserted and the rotation operation means 63 can be attached to the fixed base 41, and an end portion of the rotation shaft 95 opposite to the worm 97. Are respectively provided with a rotation operation unit 99 provided integrally therewith.

  The rotary shaft 95 has a tip projecting rearward from the worm 97, and is rotatably supported by fitting into round hole-like shaft support holes 101 formed in the fitting recesses 61 and 62, respectively.

  The worm wheel 96 includes a worm wheel 96a provided integrally with the rotating shaft 91 of the moving means 33a, and a worm wheel 96b provided integrally with the rotating shaft 91 of the moving means 33b.

  The worm wheel 96a is located on the side of the swing arm 92 located at one end (the right side shown in FIG. 1) of the rotation shaft 91a. Further, the worm wheel 96b is located below the swing arm 92 located above the rotation shaft 91b.

  Each of the worm wheels 96a and 96b includes a cylindrical base end portion 102a provided coaxially with the rotation shaft 91, and a gear portion 102b projects from one end portion of the base end portion 102a. Yes. The gear portion 102b is formed in a substantially fan shape centered on the central axis of the base end portion 102a, is provided coaxially with the base end portion 102a, and projects along the radial direction of the base end portion 102a. Further, the gear portion 102b has a pitch of substantially equal intervals along the circumferential direction which is the swinging direction of the swing arm 92. In the worm wheels 96a and 96b, the rear end portions of the gear portions 102b are fitted in the notch fitting portions 103 and 104 formed in the fitting recesses 61 and 62 in a concave shape.

  The worm 97 includes worms 97a and 97b that transmit the rotation of the rotation operation unit 99 to the worm wheels 96a and 96b. As shown in FIG. 2, the worm 97 is formed in a substantially cylindrical shape, and is provided integrally with the rotation shafts 95a and 95b of the rotation operation means 63a and 63b. Furthermore, each worm 97a, 97b has an axial direction along a direction substantially orthogonal to the rotation shaft 91, and has a substantially equal pitch along the axial direction. Further, the worms 97a and 97b are fitted in the fitting recesses 61 and 62, respectively, and rotate integrally with the rotation shafts 95a and 95b of the respective rotation operation means 63a and 63b.

  The mounting plate 98 is bent in a crank shape with a member such as a plate-like metal, and is fixed to the front surface of the base plate portion 45 of the fixed base 41, and extends forward from the fixed portion 98a. An extending portion 98b and an insertion portion 98c extending from the extending portion 98b and through which the rotary shaft 95 is inserted are bent and formed in a crank shape so as to be substantially orthogonal to each other.

  The fixing portion 98a is formed with a pair of fitting holes 105, 105 spaced apart from each other in the vertical direction V, and a screw hole 106 is formed between the fitting holes 105, 105.

  In the fitting holes 105, 105, columnar engaging protrusions 107, 107 projecting forward from the upper portions of the fitting recesses 61, 62 of the fixing base 41 are respectively fitted to fix the mounting plate 98. Position with respect to the base 41.

  A screw 108 is inserted into the screw hole 106, and the screw 108 is screwed into a screwing hole 109 formed between the engagement protrusions 107 and 107 to be tightened, whereby the rotation operation means 63 is It is fixed to the fixing member 31.

  The rotation operation unit 99 includes rotation operation units 99a and 99b provided coaxially with the rotation shafts 95a and 95b. These rotation operation portions 99a and 99b are each formed larger in diameter than the rotation shaft 95. Further, as shown in FIG. 5, each of the rotation operation units 99 a and 99 b has a part of the outside protruding to the side of the housing 2. Then, the rotation operation unit 99 rotates the worm 97 together with the rotation shaft 95, and rotates the rotation shaft 91 by the rotation of the worm wheel 96 meshed with the worm 97, thereby rotating the swing arm. The movable member 32 is moved along the vertical direction V or the horizontal direction H with respect to the fixed member 31 by swinging the swing arm 92.

  In the assembling process of the lens barrel 11 and the lens barrel support device 12, for example, first, the moving means 33a and 33b are respectively pressed from the front side of the fixed base 41 with the abutting plate 57 and screwed with the screws 56. Next, in a state where the elastic member 82 is assembled to the shift base 71, the fixed base 41 is overlapped on the shift base 71 and sandwiched between the lid bodies 43, and the swing contact portions 93c of the swing arms 92 of the moving means 33 are Each screw 42 inserted into the mounting hole 66 is fitted into the guide contact hole 87 and fastened to the screwing hole 70, and the movable member 32 is sandwiched by the fixing member 31. Further, the lens barrel 11 is fixed to the shift base 71 by inserting the rear side of the lens barrel 11 through the insertion hole 55 of the fixed base 41, inserting the screw 23 into each mounting hole 22, and tightening the screw hole 75. Then, with the distal end portion of each rotation shaft 95 of the rotation operation means 63 fitted into the shaft support hole 101, the screw 108 is fitted with the engagement protrusion 107 fitted into the fitting hole 105 of the mounting plate 98. Is inserted into the screw hole 106 and tightened into the screwing hole 109, and the worm 97 is engaged with and attached to the worm wheels 96a and 96b to complete the assembly.

  The lens barrel 11 is moved along a plane orthogonal to the optical axis O by rotating each rotation operation unit 99 with the lens barrel support device 12 attached to the housing 2 and the light source 3 turned on. Adjust the projection position of the image.

  That is, for the position adjustment in the vertical direction V, when the rotation operation part 99a of the rotation operation means 63a is rotated, the worm 97a is rotated together with the rotation shaft 95a, and the worm wheel 96a meshed with the worm 97a is moved in the circumferential direction. By pivoting, each swing arm 92a swings about the pivot shaft 91a. The swing contact portions 93c of the swing arms 92a fitted in the guide contact holes 87a contact the upper or lower inner walls of the guide contact holes 87a, respectively, so that both sides of the virtual line L1 are sandwiched. An upward or downward external force is applied to each of the moved members 32, and each swing arm 92b of the moving means 33b and the guide contact hole 87b are fitted and slidably contacted to be guided in the vertical direction V. The moved member 32 moves in the vertical direction. Further, the moving range of the moved member 32 in the vertical direction V is such that the longitudinal end portions of the swing contact portions 93c of the swing arms 92b of the moving means 33b are located at both longitudinal end portions of the guide contact holes 87b. It is regulated by contact.

  Similarly, regarding the position adjustment in the horizontal direction H, when the rotation operation unit 99b of the rotation operation means 63b is rotated, the rotation shaft 95b, the worm 97b, and the worm wheel 96b are sequentially rotated and centered on the rotation shaft 91b. The swing contact portions 93c of the swing arms 92b swung in the left and right directions are in contact with both sides in the width direction of the guide contact holes 87b. A moving force 32 is moved in the left-right direction while being guided in the horizontal direction H when the swing arm 92a of the moving means 33a and the guide contact hole 87a are fitted and slidably contacted with each other. Further, the horizontal movement range of the moved member 32 is such that the longitudinal end portions of the swing contact portions 93c of the swing arms 92a of the moving means 33a are located at both longitudinal end portions of the guide contact holes 87a. It is regulated by contact.

  As described above, in the above-described embodiment, the movable member 32 to which the lens barrel 11 is attached is supported by the fixing member 31 so as to be movable along the vertical direction V and the horizontal direction H intersecting the optical axis O. The moving means 33a, 33b applies an external force to the moved member 32 on both sides of the imaginary lines L1, L2 passing through the center of gravity G of the moved member 32 to which the lens barrel 11 is attached and along the moving direction of the moved member 32. The movable member 32 is moved with respect to the fixed member 31.

  As a result, external force can be applied to the moved member 32 in a balanced manner on both sides of the virtual lines L1 and L2 with respect to the center of gravity G of the moved member 32 to which the lens barrel 11 is attached. On the other hand, rotation about the center of gravity G can be prevented and the movement accuracy of the lens barrel 11 can be easily improved.

  In addition, a swing arm 92 is provided integrally with the rotation shaft 91, and the swing arm 92 that swings along the circumferential direction of the rotation shaft 91 as the rotation shaft 91 rotates is moved along the swing direction. By abutting on the member 32, the moving means 33 can be realized with a relatively simple configuration, and the space for disposing the swing arm 92 can be reduced to save space.

  Further, the moving means 33a and 33b are arranged so that the rotation shaft 91 is along the vertical direction V and the horizontal direction H which are substantially orthogonal to each other, and the moving member 32 and each swing arm 92 are provided with the other moving means. By arranging the guide contact holes 87a and 87b and the swing contact portion 93c so as to have a longitudinal direction along the moving direction of the moved member 32 by the 33 swing arms 92, these guide contact holes 87a, The movement of the moved member 32 can be guided and the moving direction of the moved member 32 can be determined by fitting and slidingly contacting 87b and the swing contact portion 93c.

  In addition, by fitting the swing contact portions 93c of the swing arms 92a and 92b into the guide contact holes 87a and 87b, both longitudinal ends of the guide contact holes 87a and 87b and the longitudinal direction of the swing contact portion 93c. The movement range of the moved member 32 can be easily regulated by the contact with both end portions in the direction.

  Further, by urging the movable member 32 with respect to the fixed member 31 with the elastic member 82, the movable member 32 may be moved unexpectedly by an external force due to vibration or the like, or may be dropped downward by its own weight. Can be prevented.

  Furthermore, for each of the above configurations, the structure is simplified without using a feed screw or gear train, or providing a guide shaft and a sleeve to which the guide shaft is fitted to improve the fitting accuracy. Manufacturing cost can be reduced.

  Then, by supporting the lens barrel 11 movably with respect to the housing 2 by the lens barrel support device 12, the movement accuracy of the lens barrel 11 can be improved.

  Further, by providing the rotation operation means 63 that transmits the rotation to the worm wheel 96 via the worm 97, the lens barrel 11 can be easily moved by the operation of the rotation operation means 63.

  Further, by using the worm 97 and the worm wheel 96, the worm 97 can be rotated by an external force from the worm wheel 96 side by appropriately setting the inclination angle and the friction angle of the screw of the worm 97. You can also. In this case, the worm wheel 96 does not rotate due to its own weight or the like, and it is possible to more reliably prevent the position of the lens barrel 11 from changing due to its own weight or the like.

  Then, when the rotation operation means 63 is projected along the protruding direction of the lens barrel 11 with respect to the housing 2, inside the corner portion surrounded by two directions substantially orthogonal to each other by the lens barrel 11 and the lens barrel support device 12. The rotation operation means 63 is arranged, and for example, it is possible to prevent the overall size of the projector device 1 from being increased as compared with the case where the rotation operation means is protruded above the housing. Miniaturization can be achieved.

  Further, by forming the contact portion 93c of the swing arm 92 in a substantially cylindrical shape, the swing arm 92 and the guide contact holes 87a, 87b are always contacted at substantially the same angle regardless of the swing angle. Therefore, the external force applied by the moving means 33 to the moved member 32 can be made substantially constant, and the movement accuracy of the lens barrel 11 can be further improved.

  In the above-described embodiment, the lens barrel 11 is not limited to the configuration in which the vertical direction V and the horizontal direction H are the axial directions, and for example, an oblique direction can be arranged as the axial direction.

  In addition, the light modulation unit 4, the illumination optical system 5, the projection optical system 6 and the like of the projector device 1 can take an appropriate configuration. For example, a single display device using red (R), green (G), and blue (B) color filters can be used without using the dichroic mirrors D1 and D2 or the dichroic cross prism DXP. is there.

  Furthermore, the light modulation means 4 has been described with respect to a configuration using a transmissive liquid crystal display element, but can also be applied to a configuration using a reflective display element or the like.

It is a front view which shows the lens-barrel support apparatus of one embodiment of this invention. It is a perspective view which shows the moving means of a lens-barrel support apparatus same as the above. It is a disassembled perspective view which shows a lens-barrel support apparatus same as the above. It is a disassembled perspective view which shows a lens-barrel support apparatus same as the above. It is explanatory drawing which shows the projector apparatus provided with the lens-barrel support apparatus same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector apparatus 2 Housing | casing as optical equipment main body 3 Light source 4 Light modulation means
11 Lens tube
12 Lens barrel support device
31 Fixing member
32 Moved member
33 means of transportation
63 Rotation operation means
82 Elastic member
87 Guide contact hole as contact part
91 Rotating axis
92 Swing arm as swing member
93c Swing contact part as contact part
96 Worm wheel as first gear
97 Worm O optical axis as second gear

Claims (6)

A lens barrel support device that supports the lens barrel movably along the direction intersecting the optical axis with respect to the optical device main body,
A movable member to which the lens barrel is attached;
A fixed member that supports the movable member so as to be movable along a direction intersecting the optical axis;
Moving means for moving the moving member relative to the fixed member by applying an external force to the moving member on both sides of the imaginary line along the moving direction of the moving member through the center of gravity of the moving member; A lens barrel support device characterized by comprising. Transportation means
A rotating shaft provided on the fixed member and disposed along a direction intersecting the optical axis;
An oscillating member provided integrally with the rotating shaft, oscillating along the circumferential direction of the rotating shaft as the rotating shaft rotates, and abutting on the moving member along the oscillating direction; The lens barrel support device according to claim 1, comprising: The moving means are arranged in pairs so that the rotation axes are respectively in two directions substantially orthogonal to each other,
3. The mirror according to claim 2, wherein each of the swinging members and the moved member includes a contact portion disposed along a moving direction of the moved member by the other swinging member. Tube support device. The lens barrel support device according to claim 1, further comprising an elastic member that urges the member to be moved against the fixed member. A light source;
A light modulation means for modulating the light emitted from the light source;
A lens barrel for projecting the light beam modulated by the light modulation means;
An optical device body;
A projector apparatus comprising: the lens barrel support device according to claim 1, wherein the lens barrel is movably supported with respect to the optical apparatus main body. A light source;
A light modulation means for modulating the light emitted from the light source;
A lens barrel for projecting the light beam modulated by the light modulation means;
An optical device body;
The lens barrel support device according to any one of claims 2 to 4, wherein the lens barrel is movably supported with respect to the optical device main body.
A first gear provided on the pivot shaft of the lens barrel support device and having a pitch in the circumferential direction of the pivot shaft;
Rotation operation means provided rotatably and protruding along the protruding direction of the lens barrel with respect to the optical device body,
And a second gear for transmitting the rotation of the rotation operation means to the first gear.

Images