WO2010122841A1 - Mirror-lens barrel, image pickup device and method for manufacturing a mirror-lens barrel - Google Patents

Mirror-lens barrel, image pickup device and method for manufacturing a mirror-lens barrel Download PDF

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Publication number
WO2010122841A1
WO2010122841A1 PCT/JP2010/053223 JP2010053223W WO2010122841A1 WO 2010122841 A1 WO2010122841 A1 WO 2010122841A1 JP 2010053223 W JP2010053223 W JP 2010053223W WO 2010122841 A1 WO2010122841 A1 WO 2010122841A1
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WO
WIPO (PCT)
Prior art keywords
lens
lens frame
female screw
guide shaft
lens barrel
Prior art date
Application number
PCT/JP2010/053223
Other languages
French (fr)
Japanese (ja)
Inventor
裕士 長谷川
Original Assignee
コニカミノルタオプト株式会社
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Filing date
Publication date
Application filed by コニカミノルタオプト株式会社 filed Critical コニカミノルタオプト株式会社
Publication of WO2010122841A1 publication Critical patent/WO2010122841A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing

Definitions

  • the present invention relates to a lens barrel in which a lens frame that holds a lens for zooming or focusing is driven by a lead screw and moves along a guide shaft that is arranged in parallel to the optical axis.
  • a lens barrel in which a lens frame that holds a predetermined lens for zooming or focusing is driven by a lead screw and moves along a guide shaft that is arranged in parallel to the optical axis.
  • a lens holding frame for holding a lens is guided by two guide shafts arranged in parallel with the optical axis, a lead screw is engaged with a rack gear portion of a rack supported by the lens holding frame, and the lead screw is rotated.
  • a lens driving device that moves the lens holding frame in the direction of the optical axis.
  • This lens driving device includes one coil spring having a function of pressing the rack in the optical axis direction to support the lens holding frame without backlash and a function of engaging the lead screw with the rack gear portion of the rack without backlash.
  • a portable terminal such as a cellular phone has an imaging device built therein, and a lens barrel incorporated in the imaging device is required to be small and thin.
  • a configuration suitable for mass production is also desired.
  • Patent Document 1 since Patent Document 1 is not intended for automatic assembly, each component must be mounted from various directions, and it is particularly difficult to automate the mounting of the coil spring.
  • the present invention has been made in view of such problems, and is a lens barrel having a lens frame and related members that are compact and can be automatically assembled, an image pickup apparatus including the lens barrel, and a lens barrel. It is an object of the invention to propose a manufacturing method.
  • a lens frame that holds the lens and has a main guide portion formed in a V shape or an arc shape; A first guide shaft disposed parallel to the optical axis of the lens and on which the main guide portion slides; A lead screw having a male screw and disposed parallel to the optical axis; A female screw member that is formed only in a part in the circumferential direction and has a female screw that engages with a male screw of the lead screw, and is rotatably supported by the lens frame in a direction orthogonal to the optical axis; , Located between the lens frame and the female screw member, the main guide portion of the lens frame is brought into contact with the first guide shaft, and the female screw of the female screw member is used as the male screw of the lead screw.
  • An urging member that urges to abut, Provided, A lens barrel, wherein the lens frame is moved along the first guide shaft through the female screw member by the rotation of the lead screw.
  • a second guide shaft is disposed parallel to the first guide shaft at a position opposite to the first guide shaft with respect to the optical axis, and an auxiliary guide portion formed flat on the lens frame is urged.
  • An imaging apparatus comprising the lens barrel according to any one of 1 to 5 above.
  • a lens frame having a main guide portion formed in a V shape or an arc shape is supported by a female screw member having a female screw formed only in a circumferential direction so as to be rotatable in a direction perpendicular to the optical axis.
  • the lens frame unit is formed by pivotally supporting the female screw member on the lens frame by a shaft portion formed in a direction parallel to the optical axis of the lens.
  • the lens barrel can be formed in a small size and can be automatically assembled. Therefore, mass production is possible and it can be manufactured at low cost. .
  • FIG. 2 is an exploded cross-sectional view of the lens barrel 1.
  • FIG. It is the perspective view which decomposed
  • FIG. 4 is a bottom view of a lens frame 31 and a female screw member 32.
  • FIG. 3 is a perspective view of a lens frame 31 and a female screw member 32.
  • FIG. 3 is a cross-sectional view of a lens frame 31 and a female screw member 32.
  • FIG. 4 is a bottom view of a lens frame 41 and a female screw member 42.
  • 4 is a perspective view of a lens frame 41 and a female screw member 42.
  • FIG. 3 is a cross-sectional view of a lens frame 41 and a female screw member 42.
  • FIG. 1 is a perspective view showing an arrangement of main members of a digital camera which is an example of an imaging apparatus having a lens barrel according to the present invention.
  • a lens barrel 1 incorporating a zoom lens as an imaging optical system is arranged vertically on the right side, and an optical image of a subject enters the opening 51.
  • a flash unit 52 denotes a flash light emission window
  • a flash unit 53 including a reflector, a xenon tube, a main capacitor, a circuit board, and the like is disposed behind the flash light emission window 52.
  • Reference numeral 54 denotes a memory card that records captured images.
  • a battery 55 supplies power to each unit. The image recording memory 54 and the battery 55 can be inserted and removed by opening and closing a lid member (not shown).
  • a release button 56 is arranged on the upper surface of the camera 50, and photometry and distance measurement are performed by pressing the first step, and exposure is performed by pressing the second step.
  • a main switch 57 is a switch for switching the camera between an operating state and a non-operating state. When switched to the operating state by the main switch 57, the lens barrier (not shown) is opened and the operation of each part is started. When the main switch 57 is switched to the non-operating state, the lens barrier is closed and the operation of each part is finished.
  • an image display unit 58 that is configured by an LCD, an organic EL, or the like and displays an image or other character information is disposed.
  • a zoom button for zooming up and down a playback button for playing back a captured image, a menu button for displaying various menus on the image display unit 58, and a desired function are selected from the display.
  • An operation member such as a selection button is arranged.
  • each part is connected between these main constituent units and a circuit board on which various electronic components are mounted is arranged to drive and control each main constituent unit. Yes.
  • an external input / output terminal, a strap attaching portion, a tripod seat, and the like are provided.
  • the imaging apparatus is not limited to a digital camera, and may be a video camera, a monitoring camera, a camera built in a portable terminal such as a cellular phone, or the like.
  • FIG. 2 is a sectional view of the zoom lens.
  • the zoom lens built in the lens barrel 1 is composed of four groups of a first lens group L1, a second lens group L2, a third lens group L3, and a fourth lens group L4.
  • the first lens unit L1 includes a lens L11, a prism P, a lens L12, and a lens L13, and the lens L12 and the lens L13 are cemented lenses that are cemented with each other.
  • the light image of the subject that has passed through the opening 51 in FIG. 1 is transmitted through the lens L11, then is reflected at a right angle by the prism P as a reflective optical element, and is transmitted through the lens L12 and the lens L13. Therefore, the optical axis O1 of the lens L11 and the optical axis O2 after the lens L12 are orthogonal to each other.
  • the first lens unit L1 is fixed to the casing 11 and does not move.
  • the second lens unit L2 includes a lens L21 and a lens L22.
  • the second lens group L2 is held by the lens frame 31, and when zooming, the lens frame 31 is driven as will be described later, and the second lens group L2 advances and retreats along the optical axis O2.
  • the third lens unit L3 includes one lens L31.
  • the third lens unit L3 is held by the lens frame 41, and when zooming, the lens frame 41 is driven as described later, and the third lens unit L3 advances and retreats along the optical axis O2.
  • the third lens unit L3 moves, for example, in the direction of the fourth lens unit L4 along the optical axis O2 for focusing after the zooming is completed.
  • the fourth lens unit L4 includes one lens L41.
  • the fourth lens unit L4 is fixed to the housing 11 and does not move.
  • the optical image of the subject is arranged behind the fourth lens unit L4 by the zoom lens including the first lens unit L1, the second lens unit L2, the third lens unit L3, and the fourth lens unit L4.
  • An image is formed on an image sensor (not shown).
  • each member including the zoom lens is mounted on the housing 11, it is covered with a lid member 12 described later.
  • FIGS. 3 is a top view of the lens barrel when the zoom lens is set to the wide-angle end
  • FIG. 4 is a perspective view of the lens barrel when the zoom lens is set to the wide-angle end
  • FIG. 5 is a zoom lens set to the telephoto end
  • FIG. 6 is a perspective view of the lens barrel when the zoom lens is set at the telephoto end.
  • motors 21 and 22 which are stepping motors are arranged on the left and right of the lens L11.
  • the motor 21 is integrated with a lead screw 23 extending in the direction of the fourth lens group L4 and having a male screw
  • the motor 22 is extended with a lead screw 24 extending in the direction of the fourth lens group L4 and having a male screw. It is integrated. Since the lead screws 23 and 24 are located below the lens barrel 1, they are not shown in FIGS. 3 to 6, but will be described later in detail.
  • Two guide shafts 25 and 26 are fixed to the housing 11 in parallel with the lead screws 23 and 24, and the guide shafts 25 and 26 connect the lens frame 31 holding the second lens group L2 and the third lens group L3.
  • the lens frames 41 to be held are each guided in the direction of the optical axis O2.
  • the lens frames 31 and 41 are fitted with female screw members 32 and 42 each having a female screw formed only in a part in the circumferential direction.
  • the female screw of the female screw member 32 is connected to the male screw of the lead screw 23.
  • the female screw of the female screw member 42 is screwed with the male screw of the lead screw 24.
  • the female screw members 32 and 42 will be described later in detail.
  • the motor 21 rotates at the time of zooming
  • the lead screw 23 also rotates, and the lens frame 31 is guided by the guide shafts 25 and 26 via the female screw member 32 and moves in the direction of the optical axis O2.
  • the lead screw 24 also rotates, and the lens frame 41 is guided by the guide shafts 25 and 26 via the female screw member 42 and moves in the direction of the optical axis O2. Since the rotation amounts of the motors 21 and 22 differ according to the amount of zooming, the movement positions of the lens frame 31 and the lens frame 41 change, and the distance between the groups of the second lens group L2 and the third lens group L3 changes. Therefore, zooming of the zoom lens is performed.
  • the motor 22 rotates according to the imaging distance, and the lens frame 41 moves in the same manner to perform a focusing operation.
  • the lens frames 31 and 41 are moved to predetermined positions by controlling the rotation amounts and rotation directions of the motors 21 and 22. Can do.
  • FIG. 7 is an exploded cross-sectional view of the lens barrel 1
  • FIG. 8 is a perspective view of the lens barrel 1 disassembled and viewed from one lower side
  • FIG. 9 is an exploded perspective view of the lens barrel 1 viewed from the other lower side.
  • 10 is a bottom view of the lens frame 31 and the female screw member 32
  • FIG. 11 is a perspective view of the lens frame 31 and the female screw member 32
  • FIG. 12 is a sectional view of the lens frame 31 and the female screw member 32
  • FIG. 14 is a bottom view of the frame 41 and the female screw member 42
  • FIG. 14 is a perspective view of the lens frame 41 and the female screw member 42
  • FIG. 15 is a cross-sectional view of the lens frame 41 and the female screw member 42.
  • the main members constituting the lens barrel 1 include a lid member 12, a casing 11, a lens frame 31, a lens frame 41, and a motor holding member 13 from above, as shown in FIGS.
  • the lid member 12 covers each member mounted on the housing 11 and prevents intrusion of dust and the like.
  • the housing 11 is an essential member for holding each member, and guide shafts 25 and 26 for guiding the lens frames 31 and 41 in the direction of the optical axis O2 are inserted.
  • the lens frame 31 has a main guide portion 31b formed in a V shape by sliding the guide shaft 25 (first guide shaft) at the tip of an arm portion 31a extending rightward in FIG. 7, and an arm portion extending leftward.
  • a guide guide 26 (second guide shaft) is slid on the tip of 31c, and an auxiliary guide portion 31d formed flat is provided.
  • the lens frame 31 is assembled integrally with a female screw member 32, and the female screw member 32a is formed with only a part in the circumferential direction, and is a female screw 32a that is screwed with a male screw screwed on the outer periphery of the lead screw 23.
  • the main guide portion 31b is formed in a V shape only at both ends of the arm portion 31a in the optical axis O2 direction, and is formed in a U shape so as not to contact the guide shaft 25 in the middle.
  • the shape of the main guide portion 31b is not necessarily limited to the V shape, and may be formed in an arc shape formed of a U shape, a semicircle, or the like.
  • the lens frame 31 moves the main guide portion 31b. Prevents pivoting to the center.
  • the lens frame 41 has a main guide portion 41b formed in a V shape by sliding the guide shaft 26 on the tip of an arm portion 41a extending to the left in FIG. 7, and a guide shaft on the tip of an arm portion 41c extending to the right.
  • An auxiliary guide portion 41d that slides 25 and is formed in a flat shape is provided.
  • the lens frame 41 is assembled integrally with the female screw member 42, and the female screw member 42 is formed with only a part in the circumferential direction, and is a female screw portion that is screwed with a male screw screwed on the outer periphery of the lead screw 24. 42a.
  • the main guide portion 41b is formed in a V shape only at both ends of the arm portion 41a in the optical axis O2 direction, and is formed in a U shape so as not to contact the guide shaft 26 in the middle.
  • the shape of the main guide portion 41b is not necessarily limited to the V shape, and may be formed in an arc shape formed of a U shape, a semicircle, or the like.
  • the auxiliary guide portion 41d has the lens frame 41 that moves the main guide portion 41b. Prevents pivoting to the center.
  • the motor holding member 13 holds the motors 21 and 22, and the motors 21 and 22 are arranged in parallel with the guide shafts 25 and 26 and are integrated with lead screws 23 and 24 having male screws. And it mounts
  • the left side is the first lens unit L1 side and the right side is the fourth lens unit side.
  • the right side is the first lens unit L1 side and the left side is the fourth lens unit side. This is the lens group side.
  • the lens frame 31 is assembled integrally with the female screw member 32 as shown in FIGS.
  • the lens frame 31 has two bearing portions 31e and 31f protruding rightward in FIG. 12, and the bearing portions 31e and 31f are respectively provided with through holes 31g and 31h in parallel with the optical axis O2.
  • the female screw member 32 has shaft portions 32d and 32e protruding outward from the two leg portions 32b and 32c protruding downward.
  • the shaft portion 32d is inserted into the through hole 31g, and the shaft portion 32e is inserted into the through hole 31h.
  • the female screw member 32 is rotatable about the through holes 31g and 31h of the lens frame 31. Since the female screw member 32 is resin-molded, the shaft portions 32d and 32e can be inserted into the through holes 31g and 31h, respectively, by deforming the two leg portions 32b and 32c inward.
  • a non-through hole 31f is formed in the lower surface of the arm portion 31a of the lens frame 31, and a compression spring 33 (biasing member) is inserted into the non-through hole 31f.
  • the compression spring 33 protrudes from the lower surface of the arm portion 31 a and is crimped to the female screw member 32. Accordingly, the compression spring 33 biases the lens frame 31 and the female screw member 32 in a direction in which they are separated from each other.
  • the lens frame 31 is mounted from the lower side of the casing 11, and the motor holding member 13 is further mounted from the lower side. Then, since the female screw member 32 is urged by the compression spring 33 so as to rotate clockwise around the through holes 31g and 31h, the female screw 32a is a male screw 23a screwed on the outer periphery of the lead screw 23. Screwed together. On the other hand, since the lens frame 31 is biased upward by the compression spring 33, the main guide portion 31 b of the lens frame 31 is in pressure contact with the guide shaft 25, and the auxiliary guide portion 31 d is in pressure contact with the guide shaft 26.
  • the lens frame 41 is the same as the lens frame 31.
  • the lens frame 41 is integrally assembled with the female screw member 42 as shown in FIGS.
  • the lens frame 41 has two bearing portions 41e and 41f protruding leftward in FIG. 15.
  • the bearing portions 41e and 41f are respectively provided with through holes 41g and 41h in parallel with the optical axis O2.
  • the female screw member 42 has shaft portions 42d and 42e protruding outward from the two leg portions 42b and 42c protruding downward.
  • the shaft portion 42d is inserted into the through hole 41g, and the shaft portion 42e is inserted into the through hole 41h.
  • the female screw member 42 is rotatable about the through holes 41g and 41h of the lens frame 41. Since the female screw member 42 is resin-molded, the shaft portions 42d and 42e can be inserted into the through holes 41g and 41h, respectively, by deforming the two leg portions 42b and 42c inward.
  • a non-through hole 41f is formed in the lower surface of the arm portion 41a of the lens frame 41, and a compression spring 43 (biasing member) is inserted into the non-through hole 41f.
  • the compression spring 43 protrudes from the lower surface of the arm portion 41 a and is crimped to the female screw member 42. Accordingly, the compression spring 43 biases the lens frame 41 and the female screw member 42 in a direction in which they are separated from each other.
  • the lens frame 41 is mounted from below the housing 11, and the motor holding member 13 is mounted from below. Then, the female screw member 42 is urged by the compression spring 43 so as to rotate clockwise around the through holes 41g and 41h, so that the female screw portion 42a is a male screw screwed on the outer periphery of the lead screw 24. 24a is screwed.
  • the lens frame 41 is urged upward by the compression spring 43, the main guide portion 41 b of the lens frame 41 comes into pressure contact with the guide shaft 26 and the auxiliary guide portion 41 d comes into pressure contact with the guide shaft 25.
  • the housing unit 10 is a unit in a state where at least the guide shafts 25 and 26 are inserted into the housing 11.
  • the lens frame unit 30 is a unit in a state where a female screw member 32 and a compression spring 33 are mounted on the lens frame 31.
  • the lens frame unit 40 is a unit in a state where the female screw member 42 and the compression spring 43 are mounted on the lens frame 41.
  • the motor unit 20 is a unit in a state where the motors 21 and 22 integrated with the lead screws 23 and 24 are mounted on the motor holding member 13.
  • first lens group L1, the fourth lens group L4, and the like may be attached to the housing unit 10 in advance, or may be attached after assembly, which will be described later.
  • the units are arranged upside down from those shown in FIGS. 7 to 9, but first, the housing unit 10 is arranged on the work table. Next, the main guide portion 31b is engaged with the guide shaft 25, the auxiliary guide portion 31d is brought into contact with the guide shaft 26, and the lens frame unit 30 is placed on the upper portion of the housing unit 10 (lower portion in FIGS. 7 to 9). Placed on. Subsequently, the main guide portion 41b is engaged with the guide shaft 26, the auxiliary guide portion 41d is brought into contact with the guide shaft 25, and the lens frame unit 40 is placed above the housing unit 10 (lower portion in FIGS. 7 to 9). Placed on.
  • the male screw 23a of the lead screw 23 is screwed with the female screw 32a of the female screw member 32, and the male screw 24a of the lead screw 24 is screwed with the female screw portion 42a of the female screw member 42, so that the motor unit 20 is engaged. Is mounted on the housing unit 10. After the assembly, the assembled unit is inverted and the lid member 12 is attached. Thus, the lens barrel 1 is completed.
  • the lens frame 31 is guided by the guide shafts 25 and 26 via the female screw member 32 by the rotation of the lead screw 23 and can move.
  • the screw 24 is rotated by being guided by the guide shafts 25 and 26 through the female screw member 42.
  • the lens frame unit 30, the lens frame unit 40, and the motor unit 20 can be assembled to the housing unit 10 in order from one direction, automatic assembly using a robot arm is possible. Become.
  • the zoom lens having the reflective optical element has been described.
  • the present invention does not necessarily have the reflective optical element, and is not a zoom lens but a single focus lens. Also good.
  • the number of lens frames to be moved is not limited to two, and may be one or three or more.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

Disclosed is a mirror-lens barrel that is of small size and that is capable of automatic assembly. The mirror-lens barrel is provided with: a lens frame having a main guide section that holds the lens and that is formed as a V shape or arcuate shape; a first guide shaft that is arranged parallel with the optical axis of the lens and along which the main guide section slides; a lead screw that has a male screw-thread and is arranged parallel with the optical axis; a female screw-thread member having a female screw-thread that screws together with the male screw-thread of the lead screw and is formed solely by a part thereof in the circumferential direction and is rotatably journaled in the lens frame in the direction orthogonal to the optical axis; and a biasing member positioned between the lens frame and the female screw-thread member, that causes the main guide section of the lens frame to contact the first guide shaft and that biases the female screw-thread of the female screw-thread member so as to contact the male screw-thread of the lead screw. The lens frame is moved along the first guide shaft by rotation of the lead screw, through the female screw-thread member.

Description

レンズ鏡胴、撮像装置及びレンズ鏡胴の製造方法Lens barrel, imaging device, and method of manufacturing lens barrel
　本発明は、変倍や合焦のためにレンズを保持するレンズ枠がリードスクリューによって駆動され、光軸と平行に配置された案内軸に沿って移動するレンズ鏡胴に関する。 The present invention relates to a lens barrel in which a lens frame that holds a lens for zooming or focusing is driven by a lead screw and moves along a guide shaft that is arranged in parallel to the optical axis.
　従来より、変倍や合焦のために所定のレンズを保持するレンズ枠がリードスクリューにより駆動され、光軸と平行に配置された案内軸に沿って移動するレンズ鏡胴が知られている。 2. Description of the Related Art Conventionally, there is known a lens barrel in which a lens frame that holds a predetermined lens for zooming or focusing is driven by a lead screw and moves along a guide shaft that is arranged in parallel to the optical axis.
　例えば、レンズを保持するレンズ保持枠を光軸と平行に配設した２本のガイド軸によってガイドし、レンズ保持枠に支持させたラックのラックギア部にリードスクリューを歯合させ、リードスクリューを回転させることによりレンズ保持枠を光軸方向に移動させるレンズ駆動装置が知られている。このレンズ駆動装置は、ラックを光軸方向に押圧してレンズ保持枠にガタなく支持させる機能と、リードスクリューをラックのラックギア部にガタなく歯合させる機能とを有する一つのコイルバネを備えている（特許文献１参照）。 For example, a lens holding frame for holding a lens is guided by two guide shafts arranged in parallel with the optical axis, a lead screw is engaged with a rack gear portion of a rack supported by the lens holding frame, and the lead screw is rotated. There is known a lens driving device that moves the lens holding frame in the direction of the optical axis. This lens driving device includes one coil spring having a function of pressing the rack in the optical axis direction to support the lens holding frame without backlash and a function of engaging the lead screw with the rack gear portion of the rack without backlash. (See Patent Document 1).
特開平５－２７１４９号公報JP-A-5-27149
　携帯電話等の携帯端末は撮像装置が内蔵され、その撮像装置に組み込まれるレンズ鏡胴は小型化や薄型化が要求される。また、多量生産に適した構成も望まれる。 A portable terminal such as a cellular phone has an imaging device built therein, and a lens barrel incorporated in the imaging device is required to be small and thin. A configuration suitable for mass production is also desired.
　このような要望に応えるためには、構成部品が所定の空間にまとまり、且つ、ロボットアームを用いた自動組立が可能な構成であることが望ましい。手作業でなく自動組立にすれば、作業効率が格段に向上し、多量生産に適すると共に原価低減になる。また、手作業の場合は人体や衣服から生ずる塵埃がレンズ鏡胴に付着した後、更にＣＣＤ等の撮像素子に付着して撮像画像に悪影響を及ぼすという問題が生ずるが、自動組立にすればこのような問題は激減する。 In order to meet such a demand, it is desirable that the component parts are gathered in a predetermined space and can be automatically assembled using a robot arm. If automatic assembly is used instead of manual work, the work efficiency is greatly improved, which is suitable for mass production and cost reduction. In addition, in the case of manual work, there is a problem that dust generated from the human body and clothes adheres to the lens barrel and then adheres to an image pickup device such as a CCD and adversely affects the picked-up image. Such problems are drastically reduced.
　但し、自動組立を可能にするためには、部品やユニットを一方向から順に装着できる構成にすることが必要である。 However, in order to enable automatic assembly, it is necessary to have a configuration in which components and units can be mounted in order from one direction.
　この点において、特許文献１においては自動組立を意図したものではないので、各部品を種々の方向から装着しなければならず、特にコイルバネの装着を自動化するのは困難である。 In this respect, since Patent Document 1 is not intended for automatic assembly, each component must be mounted from various directions, and it is particularly difficult to automate the mounting of the coil spring.
　本発明はかかる問題に鑑みてなされたものであり、小型であると同時に自動組立が可能なレンズ枠と関連部材を有するレンズ鏡胴、該レンズ鏡胴を備えた撮像装置、及びレンズ鏡胴の製造方法を提案することを発明の目的とする。 The present invention has been made in view of such problems, and is a lens barrel having a lens frame and related members that are compact and can be automatically assembled, an image pickup apparatus including the lens barrel, and a lens barrel. It is an object of the invention to propose a manufacturing method.
　上記目的は下記に記載した発明により達成される。 The above object is achieved by the invention described below.
　１．レンズを保持し、Ｖ字状若しくは円弧状に形成された主案内部を有するレンズ枠と、
　前記レンズの光軸と平行に配置され、前記主案内部が摺動する第１案内軸と、
　雄ネジを有して前記光軸と平行に配置されたリードスクリューと、
　円周方向の一部のみで形成され前記リードスクリューの雄ネジと螺合する雌ネジを有し、前記レンズ枠に前記光軸と直交する方向に回動自在に軸支された雌ネジ部材と、
　前記レンズ枠と前記雌ネジ部材との間に位置し、前記レンズ枠の主案内部を前記第１案内軸に当接させ、且つ、前記雌ネジ部材の雌ネジを前記リードスクリューの雄ネジに当接させるべく付勢する付勢部材と、
　を設け、
　前記リードスクリューの回転により前記雌ネジ部材を介して前記レンズ枠を前記第１案内軸に沿って移動させることを特徴とするレンズ鏡胴。 1. A lens frame that holds the lens and has a main guide portion formed in a V shape or an arc shape;
A first guide shaft disposed parallel to the optical axis of the lens and on which the main guide portion slides;
A lead screw having a male screw and disposed parallel to the optical axis;
A female screw member that is formed only in a part in the circumferential direction and has a female screw that engages with a male screw of the lead screw, and is rotatably supported by the lens frame in a direction orthogonal to the optical axis; ,
Located between the lens frame and the female screw member, the main guide portion of the lens frame is brought into contact with the first guide shaft, and the female screw of the female screw member is used as the male screw of the lead screw. An urging member that urges to abut,
Provided,
A lens barrel, wherein the lens frame is moved along the first guide shaft through the female screw member by the rotation of the lead screw.
　２．第２案内軸が前記光軸に対して前記第１案内軸の逆側の位置に前記第１案内軸と平行に配置され、前記レンズ枠に平坦状に形成された補助案内部が前記付勢部材の付勢力により該第２案内軸に当接することを特徴とする前記１に記載のレンズ鏡胴。 2. A second guide shaft is disposed parallel to the first guide shaft at a position opposite to the first guide shaft with respect to the optical axis, and an auxiliary guide portion formed flat on the lens frame is urged. 2. The lens barrel according to 1, wherein the lens barrel is brought into contact with the second guide shaft by a biasing force of a member.
　３．前記付勢部材は圧縮バネであることを特徴とする前記１又は前記２に記載のレンズ鏡胴。 3. 3. The lens barrel according to 1 or 2, wherein the biasing member is a compression spring.
　４．前記付勢部材は前記レンズと前記第１案内軸との間に配置されていることを特徴とする前記１～３の何れか１項に記載のレンズ鏡胴。 4. 4. The lens barrel according to claim 1, wherein the urging member is disposed between the lens and the first guide shaft.
　５．前記付勢部材の一端が前記レンズ枠に設けた非貫通孔に挿着されていることを特徴とする前記１～４の何れか１項に記載のレンズ鏡胴。 5. 5. The lens barrel according to claim 1, wherein one end of the urging member is inserted into a non-through hole provided in the lens frame.
　６．前記１～５の何れか１項に記載のレンズ鏡胴を備えたことを特徴とする撮像装置。 6. An imaging apparatus comprising the lens barrel according to any one of 1 to 5 above.
　７．レンズを保持するレンズ枠が雄ネジを有するリードスクリューによって駆動されて移動するレンズ鏡胴の製造方法において、
　第１案内軸が前記レンズの光軸と平行に筐体に配置されている筐体ユニットと、
　Ｖ字状若しくは円弧状に形成された主案内部を有するレンズ枠に、円周方向の一部のみで形成され雌ネジを有する雌ネジ部材が前記光軸と直交する方向に回動自在に支持され、且つ、前記レンズ枠と前記雌ネジ部材とを互いに離間させる方向に付勢する付勢部材が配置されているレンズ枠ユニットと、
　モータと一体化されているリードスクリューが装着されているモータユニットと、
　を備え、
　前記主案内部を前記第１案内軸に当接させて前記筐体ユニットの上に前記レンズ枠ユニットを載置する工程と、
　前記モータユニットを前記レンズ枠ユニットの上から前記筐体ユニットに装着し、前記リードスクリューの雄ネジを前記雌ネジ部材の雌ネジに螺合させる工程と、
　を有することを特徴とするレンズ鏡胴の製造方法。 7). In a method of manufacturing a lens barrel in which a lens frame that holds a lens is driven and moved by a lead screw having a male screw,
A housing unit in which a first guide shaft is disposed in the housing in parallel with the optical axis of the lens;
A lens frame having a main guide portion formed in a V shape or an arc shape is supported by a female screw member having a female screw formed only in a circumferential direction so as to be rotatable in a direction perpendicular to the optical axis. And a lens frame unit in which an urging member that urges the lens frame and the female screw member in a direction to separate each other is disposed,
A motor unit on which a lead screw integrated with the motor is mounted;
With
Placing the lens frame unit on the housing unit by bringing the main guide portion into contact with the first guide shaft;
Attaching the motor unit to the housing unit from above the lens frame unit, and screwing the male screw of the lead screw into the female screw of the female screw member;
A method for manufacturing a lens barrel, comprising:
　８．前記筐体ユニットにおける前記光軸に対して前記第１案内軸の逆側の位置に配置された第２案内軸に、前記レンズ枠に平坦状に形成された補助案内部を当接させる工程を有することを特徴とする前記７に記載のレンズ鏡胴の製造方法。 8. A step of abutting an auxiliary guide portion formed flat on the lens frame with a second guide shaft disposed at a position opposite to the first guide shaft with respect to the optical axis in the housing unit; 8. The method for manufacturing a lens barrel as described in 7 above.
　９．前記雌ネジ部材を前記レンズの光軸と平行な方向に形成された軸部により前記レンズ枠に軸支して前記レンズ枠ユニットを形成する工程を有することを特徴とする前記７又は前記８に記載のレンズ鏡胴の製造方法。 9. 7 or 8, wherein the lens frame unit is formed by pivotally supporting the female screw member on the lens frame by a shaft portion formed in a direction parallel to the optical axis of the lens. The manufacturing method of the lens barrel as described.
　本発明のレンズ鏡胴、撮像装置及びレンズ鏡胴の製造方法によれば、小型に形成することができ、且つ、自動組立が可能であるので、大量生産が可能で安価に製造することができる。 According to the lens barrel, the imaging device, and the lens barrel manufacturing method of the present invention, the lens barrel can be formed in a small size and can be automatically assembled. Therefore, mass production is possible and it can be manufactured at low cost. .
デジタルカメラの主要部材の配置を示す斜視図である。It is a perspective view which shows arrangement | positioning of the main member of a digital camera. ズームレンズの断面図である。It is sectional drawing of a zoom lens. ズームレンズを広角端に設定したときのレンズ鏡胴の上面図である。It is a top view of a lens barrel when the zoom lens is set at the wide angle end. ズームレンズを広角端に設定したときのレンズ鏡胴の斜視図である。It is a perspective view of a lens barrel when the zoom lens is set at the wide angle end. ズームレンズを望遠端に設定したときのレンズ鏡胴の上面図である。It is a top view of a lens barrel when the zoom lens is set to the telephoto end. ズームレンズを望遠端に設定したときのレンズ鏡胴の斜視図である。It is a perspective view of a lens barrel when the zoom lens is set at the telephoto end. レンズ鏡胴１を分解した断面図である。2 is an exploded cross-sectional view of the lens barrel 1. FIG. レンズ鏡胴１を分解し一方の下方から見た斜視図である。It is the perspective view which decomposed | disassembled the lens barrel 1 and was seen from the one downward direction. レンズ鏡胴１を分解し他方の下方から見た斜視図である。It is the perspective view which decomposed | disassembled the lens barrel 1 and was seen from the other downward direction. レンズ枠３１と雌ネジ部材３２の底面図である。4 is a bottom view of a lens frame 31 and a female screw member 32. FIG. レンズ枠３１と雌ネジ部材３２の斜視図である。3 is a perspective view of a lens frame 31 and a female screw member 32. FIG. レンズ枠３１と雌ネジ部材３２の断面図である。3 is a cross-sectional view of a lens frame 31 and a female screw member 32. FIG. レンズ枠４１と雌ネジ部材４２の底面図である。FIG. 4 is a bottom view of a lens frame 41 and a female screw member 42. レンズ枠４１と雌ネジ部材４２の斜視図である。4 is a perspective view of a lens frame 41 and a female screw member 42. FIG. レンズ枠４１と雌ネジ部材４２の断面図である。3 is a cross-sectional view of a lens frame 41 and a female screw member 42. FIG.
　以下に本発明の実施の形態を、図を参照して詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
　図１は本発明に係わるレンズ鏡胴を備えた撮像装置の一例であるデジタルカメラの主要部材の配置を示す斜視図である。 FIG. 1 is a perspective view showing an arrangement of main members of a digital camera which is an example of an imaging apparatus having a lens barrel according to the present invention.
　カメラ５０においては、撮像光学系としてのズームレンズを内蔵したレンズ鏡胴１が右側に縦長に配置され、被写体の光像が開口部５１に入射する。 In the camera 50, a lens barrel 1 incorporating a zoom lens as an imaging optical system is arranged vertically on the right side, and an optical image of a subject enters the opening 51.
　５２はフラッシュ発光窓であり、フラッシュ発光窓５２の後方には反射傘、キセノン管、メインコンデンサ及び回路基板等で構成されるフラッシュユニット５３が配置されている。５４は撮像した画像を記録するメモリカードである。５５は各部へ電源を供給する電池である。画像記録用メモリ５４及び電池５５は、不図示の蓋部材の開閉によって挿脱が可能となっている。 52 denotes a flash light emission window, and a flash unit 53 including a reflector, a xenon tube, a main capacitor, a circuit board, and the like is disposed behind the flash light emission window 52. Reference numeral 54 denotes a memory card that records captured images. A battery 55 supplies power to each unit. The image recording memory 54 and the battery 55 can be inserted and removed by opening and closing a lid member (not shown).
　カメラ５０の上面には、レリーズ釦５６が配置され、その１段目の押下により測光や測距が行われ、その２段目の押下により露光が行われる。５７はメインスイッチであり、カメラを動作状態と非動作状態に切り替えるスイッチである。メインスイッチ５７により動作状態に切り替えられると、不図示のレンズバリアが開放されると共に、各部の動作が開始される。また、メインスイッチ５７により非動作状態に切り替えられると、前記レンズバリアは閉鎖され、各部の動作は終了する。 A release button 56 is arranged on the upper surface of the camera 50, and photometry and distance measurement are performed by pressing the first step, and exposure is performed by pressing the second step. A main switch 57 is a switch for switching the camera between an operating state and a non-operating state. When switched to the operating state by the main switch 57, the lens barrier (not shown) is opened and the operation of each part is started. When the main switch 57 is switched to the non-operating state, the lens barrier is closed and the operation of each part is finished.
　カメラ５０の背面には、ＬＣＤ或いは有機ＥＬ等で構成され、画像やその他文字情報等を表示する画像表示部５８が配置されている。また、図示していないが、ズームアップ、ズームダウンを行うズーム釦、撮影した画像を再生する再生釦、画像表示部５８上に各種のメニューを表示させるメニュー釦、表示から所望の機能を選択する選択釦等の操作部材が配置されている。 On the back surface of the camera 50, an image display unit 58 that is configured by an LCD, an organic EL, or the like and displays an image or other character information is disposed. Although not shown, a zoom button for zooming up and down, a playback button for playing back a captured image, a menu button for displaying various menus on the image display unit 58, and a desired function are selected from the display. An operation member such as a selection button is arranged.
　また、不図示であるが、これら主要構成ユニットの間には、各部を接続すると共に、各種電子部品が搭載された回路基板が配置され、各主要構成ユニットの駆動及び制御を行うようになっている。同様に、不図示であるが、外部入出力端子、ストラップ取り付け部、三脚座等を備えている。 Although not shown, each part is connected between these main constituent units and a circuit board on which various electronic components are mounted is arranged to drive and control each main constituent unit. Yes. Similarly, although not shown, an external input / output terminal, a strap attaching portion, a tripod seat, and the like are provided.
　なお、撮像装置としてはデジタルカメラに限定されるものではなく、ビデオカメラ、監視用カメラ、携帯電話等の携帯端末に内蔵されるカメラ等であってもよい。 Note that the imaging apparatus is not limited to a digital camera, and may be a video camera, a monitoring camera, a camera built in a portable terminal such as a cellular phone, or the like.
　次に、撮像光学系としてのズームレンズ及びズームレンズを保持するレンズ鏡胴について図２を参照して説明する。図２はズームレンズの断面図である。 Next, a zoom lens as an imaging optical system and a lens barrel that holds the zoom lens will be described with reference to FIG. FIG. 2 is a sectional view of the zoom lens.
　本レンズ鏡胴１に内蔵されるズームレンズは、第１レンズ群Ｌ１、第２レンズ群Ｌ２、第３レンズ群Ｌ３及び第４レンズ群Ｌ４の４群から構成されている。 The zoom lens built in the lens barrel 1 is composed of four groups of a first lens group L1, a second lens group L2, a third lens group L3, and a fourth lens group L4.
　第１レンズ群Ｌ１は、レンズＬ１１、プリズムＰ、レンズＬ１２及びレンズＬ１３から構成され、レンズＬ１２及びレンズＬ１３は互いに接合された接合レンズになっている。図１の開口部５１を通過した被写体の光像はレンズＬ１１を透過した後、反射光学素子としてのプリズムＰで直角に反射され、レンズＬ１２及びレンズＬ１３を透過する。従って、レンズＬ１１の光軸Ｏ１とレンズＬ１２以降の光軸Ｏ２は直交している。なお、第１レンズ群Ｌ１は筐体１１に固定されていて、移動することはない。 The first lens unit L1 includes a lens L11, a prism P, a lens L12, and a lens L13, and the lens L12 and the lens L13 are cemented lenses that are cemented with each other. The light image of the subject that has passed through the opening 51 in FIG. 1 is transmitted through the lens L11, then is reflected at a right angle by the prism P as a reflective optical element, and is transmitted through the lens L12 and the lens L13. Therefore, the optical axis O1 of the lens L11 and the optical axis O2 after the lens L12 are orthogonal to each other. The first lens unit L1 is fixed to the casing 11 and does not move.
　第２レンズ群Ｌ２は、レンズＬ２１及びレンズＬ２２から構成されている。第２レンズ群Ｌ２はレンズ枠３１に保持されていて、変倍時にはレンズ枠３１が後述する如く駆動され、第２レンズ群Ｌ２は光軸Ｏ２に沿って進退する。 The second lens unit L2 includes a lens L21 and a lens L22. The second lens group L2 is held by the lens frame 31, and when zooming, the lens frame 31 is driven as will be described later, and the second lens group L2 advances and retreats along the optical axis O2.
　第３レンズ群Ｌ３は、１枚のレンズＬ３１から構成されている。第３レンズ群Ｌ３はレンズ枠４１に保持されていて、変倍時にはレンズ枠４１が後述する如く駆動され、第３レンズ群Ｌ３は光軸Ｏ２に沿って進退する。また、第３レンズ群Ｌ３は変倍が終了した後に、合焦のために光軸Ｏ２に沿って例えば第４レンズ群Ｌ４の方向に移動する。 The third lens unit L3 includes one lens L31. The third lens unit L3 is held by the lens frame 41, and when zooming, the lens frame 41 is driven as described later, and the third lens unit L3 advances and retreats along the optical axis O2. The third lens unit L3 moves, for example, in the direction of the fourth lens unit L4 along the optical axis O2 for focusing after the zooming is completed.
　第４レンズ群Ｌ４は１枚のレンズＬ４１から構成されている。第４レンズ群Ｌ４は筐体１１に固定されていて、移動することはない。 The fourth lens unit L4 includes one lens L41. The fourth lens unit L4 is fixed to the housing 11 and does not move.
　以上の如く第１レンズ群Ｌ１、第２レンズ群Ｌ２、第３レンズ群Ｌ３及び第４レンズ群Ｌ４から構成されたズームレンズにより、被写体の光像は第４レンズ群Ｌ４の後方に配置される不図示の撮像素子に結像する。 As described above, the optical image of the subject is arranged behind the fourth lens unit L4 by the zoom lens including the first lens unit L1, the second lens unit L2, the third lens unit L3, and the fourth lens unit L4. An image is formed on an image sensor (not shown).
　また、ズームレンズを始めとする各部材が筐体１１に装着された後は、後述する蓋部材１２によって被覆される。 Further, after each member including the zoom lens is mounted on the housing 11, it is covered with a lid member 12 described later.
　次に、第２レンズ群Ｌ２及び第３レンズ群Ｌ３を駆動する構成について図３乃至図６を参照して説明する。図３はズームレンズを広角端に設定したときのレンズ鏡胴の上面図、図４はズームレンズを広角端に設定したときのレンズ鏡胴の斜視図、図５はズームレンズを望遠端に設定したときのレンズ鏡胴の上面図、図６はズームレンズを望遠端に設定したときのレンズ鏡胴の斜視図である。 Next, a configuration for driving the second lens unit L2 and the third lens unit L3 will be described with reference to FIGS. 3 is a top view of the lens barrel when the zoom lens is set to the wide-angle end, FIG. 4 is a perspective view of the lens barrel when the zoom lens is set to the wide-angle end, and FIG. 5 is a zoom lens set to the telephoto end. FIG. 6 is a perspective view of the lens barrel when the zoom lens is set at the telephoto end.
　各図において、レンズＬ１１の左右にはステッピングモータであるモータ２１，２２が配置されている。モータ２１は、第４レンズ群Ｌ４の方向に延在し雄ネジを有するリードスクリュー２３と一体化され、モータ２２は、第４レンズ群Ｌ４の方向に延在し雄ネジを有するリードスクリュー２４と一体化されている。なお、リードスクリュー２３，２４はレンズ鏡胴１の下方に位置するため、図３乃至図６には図示されていないが、詳細は後述する。 In each figure, motors 21 and 22 which are stepping motors are arranged on the left and right of the lens L11. The motor 21 is integrated with a lead screw 23 extending in the direction of the fourth lens group L4 and having a male screw, and the motor 22 is extended with a lead screw 24 extending in the direction of the fourth lens group L4 and having a male screw. It is integrated. Since the lead screws 23 and 24 are located below the lens barrel 1, they are not shown in FIGS. 3 to 6, but will be described later in detail.
　また、２本の案内軸２５，２６がリードスクリュー２３，２４と平行に筐体１１に固定され、案内軸２５，２６は第２レンズ群Ｌ２を保持するレンズ枠３１及び第３レンズ群Ｌ３を保持するレンズ枠４１を各々光軸Ｏ２の方向に案内する。また、レンズ枠３１，４１には円周方向の一部のみで形成された雌ネジを有する雌ネジ部材３２，４２が各々装着され、雌ネジ部材３２の雌ネジはリードスクリュー２３の雄ネジと螺合し、雌ネジ部材４２の雌ネジはリードスクリュー２４の雄ネジと螺合している。なお、雌ネジ部材３２，４２については詳細に後述する。 Two guide shafts 25 and 26 are fixed to the housing 11 in parallel with the lead screws 23 and 24, and the guide shafts 25 and 26 connect the lens frame 31 holding the second lens group L2 and the third lens group L3. The lens frames 41 to be held are each guided in the direction of the optical axis O2. The lens frames 31 and 41 are fitted with female screw members 32 and 42 each having a female screw formed only in a part in the circumferential direction. The female screw of the female screw member 32 is connected to the male screw of the lead screw 23. The female screw of the female screw member 42 is screwed with the male screw of the lead screw 24. The female screw members 32 and 42 will be described later in detail.
　そして、変倍時にはモータ２１が回転するので、リードスクリュー２３も回転し、雌ネジ部材３２を介してレンズ枠３１は案内軸２５，２６に案内されて光軸Ｏ２の方向に移動する。同様に、変倍時にはモータ２２も回転するので、リードスクリュー２４も回転し、雌ネジ部材４２を介してレンズ枠４１も案内軸２５，２６に案内されて光軸Ｏ２の方向に移動する。変倍量に応じてモータ２１，２２の回転量は異なるので、レンズ枠３１とレンズ枠４１の移動位置が変化し、第２レンズ群Ｌ２と第３レンズ群Ｌ３との群間距離が変化するので、ズームレンズの変倍が行われる。また、変倍後には撮像距離に応じてモータ２２が回転し、同様にレンズ枠４１が移動して合焦動作が行われる。 Since the motor 21 rotates at the time of zooming, the lead screw 23 also rotates, and the lens frame 31 is guided by the guide shafts 25 and 26 via the female screw member 32 and moves in the direction of the optical axis O2. Similarly, since the motor 22 also rotates at the time of zooming, the lead screw 24 also rotates, and the lens frame 41 is guided by the guide shafts 25 and 26 via the female screw member 42 and moves in the direction of the optical axis O2. Since the rotation amounts of the motors 21 and 22 differ according to the amount of zooming, the movement positions of the lens frame 31 and the lens frame 41 change, and the distance between the groups of the second lens group L2 and the third lens group L3 changes. Therefore, zooming of the zoom lens is performed. In addition, after zooming, the motor 22 rotates according to the imaging distance, and the lens frame 41 moves in the same manner to perform a focusing operation.
　また、レンズ枠３１，４１の初期位置をフォトセンサ２７，２８が検知するので、モータ２１，２２の回転量及び回転方向を制御することにより、レンズ枠３１，４１を所定の位置に移動させることができる。 In addition, since the photosensors 27 and 28 detect the initial positions of the lens frames 31 and 41, the lens frames 31 and 41 are moved to predetermined positions by controlling the rotation amounts and rotation directions of the motors 21 and 22. Can do.
　次に、レンズ枠３１，３２をリードスクリュー２３，２４により駆動するための各部材の構成について図７乃至図１５を参照して詳述する。 Next, the configuration of each member for driving the lens frames 31 and 32 by the lead screws 23 and 24 will be described in detail with reference to FIGS.
　図７はレンズ鏡胴１を分解した断面図、図８はレンズ鏡胴１を分解し一方の下方から見た斜視図、図９はレンズ鏡胴１を分解し他方の下方から見た斜視図、図１０はレンズ枠３１と雌ネジ部材３２の底面図、図１１はレンズ枠３１と雌ネジ部材３２の斜視図、図１２はレンズ枠３１と雌ネジ部材３２の断面図、図１３はレンズ枠４１と雌ネジ部材４２の底面図、図１４はレンズ枠４１と雌ネジ部材４２の斜視図、図１５はレンズ枠４１と雌ネジ部材４２の断面図である。 7 is an exploded cross-sectional view of the lens barrel 1, FIG. 8 is a perspective view of the lens barrel 1 disassembled and viewed from one lower side, and FIG. 9 is an exploded perspective view of the lens barrel 1 viewed from the other lower side. 10 is a bottom view of the lens frame 31 and the female screw member 32, FIG. 11 is a perspective view of the lens frame 31 and the female screw member 32, FIG. 12 is a sectional view of the lens frame 31 and the female screw member 32, and FIG. 14 is a bottom view of the frame 41 and the female screw member 42, FIG. 14 is a perspective view of the lens frame 41 and the female screw member 42, and FIG. 15 is a cross-sectional view of the lens frame 41 and the female screw member 42.
　レンズ鏡胴１を構成する主要の部材は、図７乃至図９に示す如く、上方から蓋部材１２、筐体１１、レンズ枠３１、レンズ枠４１及びモータ保持部材１３から成る。 The main members constituting the lens barrel 1 include a lid member 12, a casing 11, a lens frame 31, a lens frame 41, and a motor holding member 13 from above, as shown in FIGS.
　蓋部材１２は筐体１１に装着された各部材を被覆し、塵埃等の侵入を防止する。 The lid member 12 covers each member mounted on the housing 11 and prevents intrusion of dust and the like.
　筐体１１は各部材を保持する要の部材で、レンズ枠３１，４１を光軸Ｏ２の方向に案内する案内軸２５，２６が挿着されている。 The housing 11 is an essential member for holding each member, and guide shafts 25 and 26 for guiding the lens frames 31 and 41 in the direction of the optical axis O2 are inserted.
　レンズ枠３１は図７の右方に伸びた腕部３１ａの先端に案内軸２５（第１案内軸）を摺動しＶ字状に形成された主案内部３１ｂ、左方に伸びた腕部３１ｃの先端に案内軸２６（第２案内軸）を摺動し平坦状に形成された補助案内部３１ｄが設けられている。レンズ枠３１は雌ネジ部材３２と一体的に組み立てられ、雌ネジ部材３２は及び円周方向の一部のみで形成されリードスクリュー２３の外周に螺設された雄ネジと螺合する雌ネジ３２ａを有する。 The lens frame 31 has a main guide portion 31b formed in a V shape by sliding the guide shaft 25 (first guide shaft) at the tip of an arm portion 31a extending rightward in FIG. 7, and an arm portion extending leftward. A guide guide 26 (second guide shaft) is slid on the tip of 31c, and an auxiliary guide portion 31d formed flat is provided. The lens frame 31 is assembled integrally with a female screw member 32, and the female screw member 32a is formed with only a part in the circumferential direction, and is a female screw 32a that is screwed with a male screw screwed on the outer periphery of the lead screw 23. Have
　なお、主案内部３１ｂは腕部３１ａにおける光軸Ｏ２方向の両端でのみＶ字状に形成され、その中間では案内軸２５に当接しないようにＵの字状に形成されている。 The main guide portion 31b is formed in a V shape only at both ends of the arm portion 31a in the optical axis O2 direction, and is formed in a U shape so as not to contact the guide shaft 25 in the middle.
　但し、主案内部３１ｂの形状は必ずしもＶ字状に限定されるものではなく、Ｕ字形や半円形等から成る円弧状に形成されていてもよい。 However, the shape of the main guide portion 31b is not necessarily limited to the V shape, and may be formed in an arc shape formed of a U shape, a semicircle, or the like.
　また、主案内部３１ｂが案内軸２５に係合することによりレンズ枠３１が保持する第２レンズ群Ｌ２の光軸Ｏ２の位置が定まり、補助案内部３１ｄはレンズ枠３１が主案内部３１ｂを中心に回動することを防止している。 Further, when the main guide portion 31b engages with the guide shaft 25, the position of the optical axis O2 of the second lens group L2 held by the lens frame 31 is determined, and in the auxiliary guide portion 31d, the lens frame 31 moves the main guide portion 31b. Prevents pivoting to the center.
　レンズ枠４１は図７の左方に伸びた腕部４１ａの先端に案内軸２６を摺動しＶ字状に形成された主案内部４１ｂ、右方に伸びた腕部４１ｃの先端に案内軸２５を摺動し平坦状に形成された補助案内部４１ｄが設けられている。レンズ枠４１は雌ネジ部材４２と一体的に組み立てられ、雌ネジ部材４２は及び円周方向の一部のみで形成されリードスクリュー２４の外周に螺設された雄ネジと螺合する雌ネジ部４２ａを有する。 The lens frame 41 has a main guide portion 41b formed in a V shape by sliding the guide shaft 26 on the tip of an arm portion 41a extending to the left in FIG. 7, and a guide shaft on the tip of an arm portion 41c extending to the right. An auxiliary guide portion 41d that slides 25 and is formed in a flat shape is provided. The lens frame 41 is assembled integrally with the female screw member 42, and the female screw member 42 is formed with only a part in the circumferential direction, and is a female screw portion that is screwed with a male screw screwed on the outer periphery of the lead screw 24. 42a.
　なお、主案内部４１ｂは腕部４１ａにおける光軸Ｏ２方向の両端でのみＶ字状に形成され、その中間では案内軸２６に当接しないようにＵの字状に形成されている。 The main guide portion 41b is formed in a V shape only at both ends of the arm portion 41a in the optical axis O2 direction, and is formed in a U shape so as not to contact the guide shaft 26 in the middle.
　但し、主案内部４１ｂの形状は必ずしもＶ字状に限定されるものではなく、Ｕ字形や半円形等から成る円弧状に形成されていてもよい。 However, the shape of the main guide portion 41b is not necessarily limited to the V shape, and may be formed in an arc shape formed of a U shape, a semicircle, or the like.
　また、主案内部４１ｂが案内軸２６に係合することによりレンズ枠４１が保持する第３レンズ群Ｌ３の光軸Ｏ２の位置が定まり、補助案内部４１ｄはレンズ枠４１が主案内部４１ｂを中心に回動することを防止している。 Further, when the main guide portion 41b engages with the guide shaft 26, the position of the optical axis O2 of the third lens unit L3 held by the lens frame 41 is determined, and the auxiliary guide portion 41d has the lens frame 41 that moves the main guide portion 41b. Prevents pivoting to the center.
　モータ保持部材１３はモータ２１，２２を保持し、モータ２１，２２は案内軸２５，２６と平行に配置されて雄ネジを有するリードスクリュー２３，２４と一体化されている。そして、筐体１１に下方から装着される。 The motor holding member 13 holds the motors 21 and 22, and the motors 21 and 22 are arranged in parallel with the guide shafts 25 and 26 and are integrated with lead screws 23 and 24 having male screws. And it mounts | wears with the housing | casing 11 from the downward direction.
　なお、図８においては左方が第１レンズ群Ｌ１の側で右方が第４レンズ群の側であって、図９においては右方が第１レンズ群Ｌ１の側で左方が第４レンズ群の側である。 In FIG. 8, the left side is the first lens unit L1 side and the right side is the fourth lens unit side. In FIG. 9, the right side is the first lens unit L1 side and the left side is the fourth lens unit side. This is the lens group side.
　レンズ枠３１は、図１０乃至図１２に示す如く、雌ネジ部材３２と一体的に組み立てられている。 The lens frame 31 is assembled integrally with the female screw member 32 as shown in FIGS.
　レンズ枠３１は図１２の右方に突出した二つの軸受け部３１ｅ，３１ｆを有し、軸受け部３１ｅ，３１ｆにはそれぞれ光軸Ｏ２と平行に貫通孔３１ｇ，３１ｈが穿設されている。一方、雌ネジ部材３２は下方に突出した二つの脚部３２ｂ，３２ｃの外側に突出した軸部３２ｄ，３２ｅを有している。そして、貫通孔３１ｇに軸部３２ｄが挿入され、貫通孔３１ｈに軸部３２ｅが挿入されている。従って、雌ネジ部材３２はレンズ枠３１の貫通孔３１ｇ，３１ｈを中心に回動自在である。なお、雌ネジ部材３２は樹脂成型されているので、二つの脚部３２ｂ，３２ｃを内側に変形させれば、軸部３２ｄ，３２ｅを貫通孔３１ｇ，３１ｈにそれぞれ挿入することができる。 The lens frame 31 has two bearing portions 31e and 31f protruding rightward in FIG. 12, and the bearing portions 31e and 31f are respectively provided with through holes 31g and 31h in parallel with the optical axis O2. On the other hand, the female screw member 32 has shaft portions 32d and 32e protruding outward from the two leg portions 32b and 32c protruding downward. The shaft portion 32d is inserted into the through hole 31g, and the shaft portion 32e is inserted into the through hole 31h. Accordingly, the female screw member 32 is rotatable about the through holes 31g and 31h of the lens frame 31. Since the female screw member 32 is resin-molded, the shaft portions 32d and 32e can be inserted into the through holes 31g and 31h, respectively, by deforming the two leg portions 32b and 32c inward.
　また、図１２に示す如く、レンズ枠３１の腕部３１ａの下面には非貫通孔３１ｆが穿設され、非貫通孔３１ｆに圧縮バネ３３（付勢部材）が挿着されている。圧縮バネ３３は腕部３１ａの下面より突出し、雌ネジ部材３２に圧着している。従って、圧縮バネ３３はレンズ枠３１と雌ネジ部材３２を互いに離間させる方向に付勢している。 Further, as shown in FIG. 12, a non-through hole 31f is formed in the lower surface of the arm portion 31a of the lens frame 31, and a compression spring 33 (biasing member) is inserted into the non-through hole 31f. The compression spring 33 protrudes from the lower surface of the arm portion 31 a and is crimped to the female screw member 32. Accordingly, the compression spring 33 biases the lens frame 31 and the female screw member 32 in a direction in which they are separated from each other.
　このような状態で、レンズ枠３１が筐体１１の下方から装着され、更に、その下方からモータ保持部材１３が装着される。すると、雌ネジ部材３２は圧縮バネ３３によって貫通孔３１ｇ，３１ｈを中心に時計方向に回動するように付勢されるので、雌ネジ３２ａはリードスクリュー２３の外周に螺設された雄ネジ２３ａと螺合する。一方、レンズ枠３１は圧縮バネ３３によって上方に付勢されるので、レンズ枠３１の主案内部３１ｂが案内軸２５に圧接し、補助案内部３１ｄが案内軸２６に圧接する。 In such a state, the lens frame 31 is mounted from the lower side of the casing 11, and the motor holding member 13 is further mounted from the lower side. Then, since the female screw member 32 is urged by the compression spring 33 so as to rotate clockwise around the through holes 31g and 31h, the female screw 32a is a male screw 23a screwed on the outer periphery of the lead screw 23. Screwed together. On the other hand, since the lens frame 31 is biased upward by the compression spring 33, the main guide portion 31 b of the lens frame 31 is in pressure contact with the guide shaft 25, and the auxiliary guide portion 31 d is in pressure contact with the guide shaft 26.
　レンズ枠４１はレンズ枠３１と同様である。レンズ枠４１は、図１３乃至図１５に示す如く、雌ネジ部材４２と一体的に組み立てられている。 The lens frame 41 is the same as the lens frame 31. The lens frame 41 is integrally assembled with the female screw member 42 as shown in FIGS.
　レンズ枠４１は図１５の左方に突出した二つの軸受け部４１ｅ，４１ｆを有し、軸受け部４１ｅ，４１ｆにはそれぞれ光軸Ｏ２と平行に貫通孔４１ｇ，４１ｈが穿設されている。一方、雌ネジ部材４２は下方に突出した二つの脚部４２ｂ，４２ｃの外側に突出した軸部４２ｄ，４２ｅを有している。そして、貫通孔４１ｇに軸部４２ｄが挿入され、貫通孔４１ｈに軸部４２ｅが挿入されている。従って、雌ネジ部材４２はレンズ枠４１の貫通孔４１ｇ，４１ｈを中心に回動自在である。なお、雌ネジ部材４２は樹脂成型されているので、二つの脚部４２ｂ，４２ｃを内側に変形させれば、軸部４２ｄ，４２ｅを貫通孔４１ｇ，４１ｈにそれぞれ挿入することができる。 The lens frame 41 has two bearing portions 41e and 41f protruding leftward in FIG. 15. The bearing portions 41e and 41f are respectively provided with through holes 41g and 41h in parallel with the optical axis O2. On the other hand, the female screw member 42 has shaft portions 42d and 42e protruding outward from the two leg portions 42b and 42c protruding downward. The shaft portion 42d is inserted into the through hole 41g, and the shaft portion 42e is inserted into the through hole 41h. Accordingly, the female screw member 42 is rotatable about the through holes 41g and 41h of the lens frame 41. Since the female screw member 42 is resin-molded, the shaft portions 42d and 42e can be inserted into the through holes 41g and 41h, respectively, by deforming the two leg portions 42b and 42c inward.
　また、図１５に示す如く、レンズ枠４１の腕部４１ａの下面には非貫通孔４１ｆが穿設され、非貫通孔４１ｆに圧縮バネ４３（付勢部材）が挿着されている。圧縮バネ４３は腕部４１ａの下面より突出し、雌ネジ部材４２に圧着している。従って、圧縮バネ４３はレンズ枠４１と雌ネジ部材４２を互いに離間させる方向に付勢している。 Further, as shown in FIG. 15, a non-through hole 41f is formed in the lower surface of the arm portion 41a of the lens frame 41, and a compression spring 43 (biasing member) is inserted into the non-through hole 41f. The compression spring 43 protrudes from the lower surface of the arm portion 41 a and is crimped to the female screw member 42. Accordingly, the compression spring 43 biases the lens frame 41 and the female screw member 42 in a direction in which they are separated from each other.
　このような状態で、レンズ枠４１が筐体１１の下方から装着され、更に、その下方からモータ保持部材１３が装着される。すると、雌ネジ部材４２は圧縮バネ４３によって貫通孔４１ｇ，４１ｈを中心に時計方向に回動するように付勢されるので、雌ネジ部４２ａはリードスクリュー２４の外周に螺設された雄ネジ２４ａと螺合する。一方、レンズ枠４１は圧縮バネ４３によって上方に付勢されるので、レンズ枠４１の主案内部４１ｂが案内軸２６に圧接し、補助案内部４１ｄが案内軸２５に圧接する。 In this state, the lens frame 41 is mounted from below the housing 11, and the motor holding member 13 is mounted from below. Then, the female screw member 42 is urged by the compression spring 43 so as to rotate clockwise around the through holes 41g and 41h, so that the female screw portion 42a is a male screw screwed on the outer periphery of the lead screw 24. 24a is screwed. On the other hand, since the lens frame 41 is urged upward by the compression spring 43, the main guide portion 41 b of the lens frame 41 comes into pressure contact with the guide shaft 26 and the auxiliary guide portion 41 d comes into pressure contact with the guide shaft 25.
　以上の如き構成のレンズ鏡胴１の組立時には、筐体ユニット１０、レンズ枠ユニット３０、レンズ枠ユニット４０及びモータユニット２０を準備する。筐体ユニット１０は、筐体１１に少なくとも案内軸２５，２６が挿着されている状態のユニットである。レンズ枠ユニット３０は、レンズ枠３１に雌ネジ部材３２と圧縮バネ３３が装着されている状態のユニットである。レンズ枠ユニット４０は、レンズ枠４１に雌ネジ部材４２と圧縮バネ４３が装着されている状態のユニットである。モータユニット２０は、リードスクリュー２３，２４と一体化されているモータ２１，２２がモータ保持部材１３に装着されている状態のユニットである。 When the lens barrel 1 having the above-described configuration is assembled, the housing unit 10, the lens frame unit 30, the lens frame unit 40, and the motor unit 20 are prepared. The housing unit 10 is a unit in a state where at least the guide shafts 25 and 26 are inserted into the housing 11. The lens frame unit 30 is a unit in a state where a female screw member 32 and a compression spring 33 are mounted on the lens frame 31. The lens frame unit 40 is a unit in a state where the female screw member 42 and the compression spring 43 are mounted on the lens frame 41. The motor unit 20 is a unit in a state where the motors 21 and 22 integrated with the lead screws 23 and 24 are mounted on the motor holding member 13.
　なお、筐体ユニット１０には第１レンズ群Ｌ１や第４レンズ群Ｌ４等を予め装着しておいてもよいし、後述する組立後に装着するようにしてもよい。 Note that the first lens group L1, the fourth lens group L4, and the like may be attached to the housing unit 10 in advance, or may be attached after assembly, which will be described later.
　そして、実際の組立時には図７乃至図９に示す図とは各ユニットの配置が逆さまになるが、先ず筐体ユニット１０を作業台に配置する。次に、主案内部３１ｂを案内軸２５と係合させ、補助案内部３１ｄを案内軸２６に当接させて、レンズ枠ユニット３０を筐体ユニット１０の上部（図７乃至図９では下部）に載置する。続いて、主案内部４１ｂを案内軸２６と係合させ、補助案内部４１ｄを案内軸２５に当接させて、レンズ枠ユニット４０を筐体ユニット１０の上部（図７乃至図９では下部）に載置する。最後に、リードスクリュー２３の雄ネジ２３ａを雌ネジ部材３２の雌ネジ３２ａに螺合させ、リードスクリュー２４の雄ネジ２４ａを雌ネジ部材４２の雌ネジ部４２ａに螺合させて、モータユニット２０を筐体ユニット１０に装着する。このように組み立てた後、組み立てたユニットを反転させ、蓋部材１２を装着すれば、レンズ鏡胴１が完成する。 In actual assembly, the units are arranged upside down from those shown in FIGS. 7 to 9, but first, the housing unit 10 is arranged on the work table. Next, the main guide portion 31b is engaged with the guide shaft 25, the auxiliary guide portion 31d is brought into contact with the guide shaft 26, and the lens frame unit 30 is placed on the upper portion of the housing unit 10 (lower portion in FIGS. 7 to 9). Placed on. Subsequently, the main guide portion 41b is engaged with the guide shaft 26, the auxiliary guide portion 41d is brought into contact with the guide shaft 25, and the lens frame unit 40 is placed above the housing unit 10 (lower portion in FIGS. 7 to 9). Placed on. Finally, the male screw 23a of the lead screw 23 is screwed with the female screw 32a of the female screw member 32, and the male screw 24a of the lead screw 24 is screwed with the female screw portion 42a of the female screw member 42, so that the motor unit 20 is engaged. Is mounted on the housing unit 10. After the assembly, the assembled unit is inverted and the lid member 12 is attached. Thus, the lens barrel 1 is completed.
　このようにしてレンズ鏡胴１が組み立てられた後、レンズ枠３１はリードスクリュー２３の回転により雌ネジ部材３２を介して案内軸２５，２６に案内されて移動可能になり、レンズ枠４１はリードスクリュー２４の回転により雌ネジ部材４２を介して案内軸２５，２６に案内されて移動可能になる。 After the lens barrel 1 is assembled in this manner, the lens frame 31 is guided by the guide shafts 25 and 26 via the female screw member 32 by the rotation of the lead screw 23 and can move. The screw 24 is rotated by being guided by the guide shafts 25 and 26 through the female screw member 42.
　また、筐体ユニット１０に対して、レンズ枠ユニット３０、レンズ枠ユニット４０及びモータユニット２０を順に一方向から載置するようにして組み付けることができるので、ロボットアームを用いた自動組立が可能になる。 In addition, since the lens frame unit 30, the lens frame unit 40, and the motor unit 20 can be assembled to the housing unit 10 in order from one direction, automatic assembly using a robot arm is possible. Become.
　なお、以上の実施の形態の撮像光学系においては反射光学素子を有するズームレンズとして説明したが、本発明は必ずしも反射光学素子を有する必要はなく、また、ズームレンズでなく単焦点レンズであってもよい。 In the imaging optical system of the above embodiment, the zoom lens having the reflective optical element has been described. However, the present invention does not necessarily have the reflective optical element, and is not a zoom lens but a single focus lens. Also good.
　また、移動させるレンズ枠は２個に限定されるものではなく、１個であっても３個以上であってもよい。 Further, the number of lens frames to be moved is not limited to two, and may be one or three or more.
　１　レンズ鏡胴
　１０　筐体ユニット
　１１　筐体
　１２　蓋部材
　１３　モータ保持部材
　２１，２２　モータ
　２３，２４　リードスクリュー
　２５，２６　案内軸
　２３ａ，２４ａ　雄ネジ
　３０，４０　レンズ枠ユニット
　３１，４１　レンズ枠
　３２，４２　雌ネジ部材
　３２ａ，４２ａ　雌ネジ
　３３，４３　圧縮バネ
　３１ｂ，４１ｂ　主案内部
　３１ｄ，４２ｄ　補助案内部
　５０　カメラ
　Ｌ１　第１レンズ群
　Ｌ２　第２レンズ群
　Ｌ３　第３レンズ群
　Ｌ４　第４レンズ群
　Ｏ１，Ｏ２　光軸 DESCRIPTION OF SYMBOLS 1 Lens barrel 10 Case unit 11 Case 12 Cover member 13 Motor holding member 21, 22 Motor 23, 24 Lead screw 25, 26 Guide shaft 23a, 24a Male screw 30, 40 Lens frame unit 31, 41 Lens frame 32, 42 Female thread member 32a, 42a Female thread 33, 43 Compression spring 31b, 41b Main guide part 31d, 42d Auxiliary guide part 50 Camera L1 1st lens group L2 2nd lens group L3 3rd lens group L4 4th lens group O1, O2 optical axis

Claims (9)

  1. 　レンズを保持し、Ｖ字状若しくは円弧状に形成された主案内部を有するレンズ枠と、
    　前記レンズの光軸と平行に配置され、前記主案内部が摺動する第１案内軸と、
    　雄ネジを有して前記光軸と平行に配置されたリードスクリューと、
    　円周方向の一部のみで形成され前記リードスクリューの雄ネジと螺合する雌ネジを有し、前記レンズ枠に前記光軸と直交する方向に回動自在に軸支された雌ネジ部材と、
    　前記レンズ枠と前記雌ネジ部材との間に位置し、前記レンズ枠の主案内部を前記第１案内軸に当接させ、且つ、前記雌ネジ部材の雌ネジを前記リードスクリューの雄ネジに当接させるべく付勢する付勢部材と、
    　を設け、
    　前記リードスクリューの回転により前記雌ネジ部材を介して前記レンズ枠を前記第１案内軸に沿って移動させることを特徴とするレンズ鏡胴。     A lens frame that holds the lens and has a main guide portion formed in a V shape or an arc shape;
    A first guide shaft disposed parallel to the optical axis of the lens and on which the main guide portion slides;
    A lead screw having a male screw and disposed parallel to the optical axis;
    A female screw member that is formed only in a part in the circumferential direction and has a female screw that engages with a male screw of the lead screw, and is rotatably supported by the lens frame in a direction orthogonal to the optical axis; ,
    Located between the lens frame and the female screw member, the main guide portion of the lens frame is brought into contact with the first guide shaft, and the female screw of the female screw member is used as the male screw of the lead screw. An urging member that urges to abut,
    Provided,
    A lens barrel, wherein the lens frame is moved along the first guide shaft through the female screw member by the rotation of the lead screw.
  2. 　第２案内軸が前記光軸に対して前記第１案内軸の逆側の位置に前記第１案内軸と平行に配置され、前記レンズ枠に平坦状に形成された補助案内部が前記付勢部材の付勢力により該第２案内軸に当接することを特徴とする請求項１に記載のレンズ鏡胴。 A second guide shaft is disposed parallel to the first guide shaft at a position opposite to the first guide shaft with respect to the optical axis, and an auxiliary guide portion formed flat on the lens frame is urged. The lens barrel according to claim 1, wherein the lens barrel comes into contact with the second guide shaft by a biasing force of a member.
  3. 　前記付勢部材は圧縮バネであることを特徴とする請求項１又は請求項２に記載のレンズ鏡胴。 3. The lens barrel according to claim 1, wherein the biasing member is a compression spring.
  4. 　前記付勢部材は前記レンズと前記第１案内軸との間に配置されていることを特徴とする請求項１～３の何れか１項に記載のレンズ鏡胴。 The lens barrel according to any one of claims 1 to 3, wherein the biasing member is disposed between the lens and the first guide shaft.
  5. 　前記付勢部材の一端が前記レンズ枠に設けた非貫通孔に挿着されていることを特徴とする請求項１～４の何れか１項に記載のレンズ鏡胴。 The lens barrel according to any one of claims 1 to 4, wherein one end of the urging member is inserted into a non-through hole provided in the lens frame.
  6. 　請求項１～５の何れか１項に記載のレンズ鏡胴を備えたことを特徴とする撮像装置。 An image pickup apparatus comprising the lens barrel according to any one of claims 1 to 5.
  7. 　レンズを保持するレンズ枠が雄ネジを有するリードスクリューによって駆動されて移動するレンズ鏡胴の製造方法において、
    　第１案内軸が前記レンズの光軸と平行に筐体に配置されている筐体ユニットと、
    　Ｖ字状若しくは円弧状に形成された主案内部を有するレンズ枠に、円周方向の一部のみで形成され雌ネジを有する雌ネジ部材が前記光軸と直交する方向に回動自在に支持され、且つ、前記レンズ枠と前記雌ネジ部材とを互いに離間させる方向に付勢する付勢部材が配置されているレンズ枠ユニットと、
    　モータと一体化されているリードスクリューが装着されているモータユニットと、
    　を備え、
    　前記主案内部を前記第１案内軸に当接させて前記筐体ユニットの上に前記レンズ枠ユニットを載置する工程と、
    　前記モータユニットを前記レンズ枠ユニットの上から前記筐体ユニットに装着し、前記リードスクリューの雄ネジを前記雌ネジ部材の雌ネジに螺合させる工程と、
    　を有することを特徴とするレンズ鏡胴の製造方法。     In a method of manufacturing a lens barrel in which a lens frame that holds a lens is driven and moved by a lead screw having a male screw,
    A housing unit in which a first guide shaft is disposed in the housing in parallel with the optical axis of the lens;
    A lens frame having a main guide portion formed in a V shape or an arc shape is supported by a female screw member having a female screw formed only in a circumferential direction so as to be rotatable in a direction perpendicular to the optical axis. And a lens frame unit in which an urging member that urges the lens frame and the female screw member in a direction to separate each other is disposed,
    A motor unit on which a lead screw integrated with the motor is mounted;
    With
    Placing the lens frame unit on the housing unit by bringing the main guide portion into contact with the first guide shaft;
    Attaching the motor unit to the housing unit from above the lens frame unit, and screwing the male screw of the lead screw into the female screw of the female screw member;
    A method for manufacturing a lens barrel, comprising:
  8. 　前記筐体ユニットにおける前記光軸に対して前記第１案内軸の逆側の位置に配置された第２案内軸に、前記レンズ枠に平坦状に形成された補助案内部を当接させる工程を有することを特徴とする請求項７に記載のレンズ鏡胴の製造方法。 A step of abutting an auxiliary guide portion formed flat on the lens frame with a second guide shaft disposed at a position opposite to the first guide shaft with respect to the optical axis in the housing unit; The method of manufacturing a lens barrel according to claim 7, comprising:
  9. 　前記雌ネジ部材を前記レンズの光軸と平行な方向に形成された軸部により前記レンズ枠に軸支して前記レンズ枠ユニットを形成する工程を有することを特徴とする請求項７又は請求項８に記載のレンズ鏡胴の製造方法。 The lens frame unit is formed by pivotally supporting the female screw member on the lens frame by a shaft portion formed in a direction parallel to the optical axis of the lens. A method for manufacturing the lens barrel according to claim 8.
PCT/JP2010/053223 2009-04-22 2010-03-01 Mirror-lens barrel, image pickup device and method for manufacturing a mirror-lens barrel WO2010122841A1 (en)

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