JP5978799B2 - Lens barrel - Google Patents

Description

  The present invention relates to a lens barrel provided with an optical axis correction lens group including at least one lens.

  2. Description of the Related Art In recent years, there has been a demand for higher image quality of captured images in imaging devices such as digital cameras. Here, in order to satisfy the demand for high image quality, the position of the lens group in the lens barrel viewed in the direction orthogonal to the optical axis of the optical system is a predetermined position according to the setting as the optical system. It is necessary to perform so-called lens group alignment with high accuracy. For this reason, in order to align a part of the optical system or the entire optical system, a lens barrel having a lens alignment mechanism that adjusts the position of the plurality of lenses viewed in the direction perpendicular to the photographing optical axis is already known. (For example, refer to Patent Document 1).

  In this lens barrel (lens aligning mechanism), the second lens and the third lens as the optical axis correction lens group are held in the fitting recess inside the cylindrical first lens frame holding the first lens. A cylindrical second lens frame is fitted. The fitting recess is formed around the first holding portion for holding the first lens in the first lens frame, and the second lens frame is fitted with a predetermined gap from the second lens frame (the outer peripheral surface thereof). As a result, the second lens frame is held. The second lens frame is provided with three protrusions that protrude radially outward from the outer peripheral surface at equal intervals in the circumferential direction, and are respectively provided in fitting recesses (first lens frame) correspondingly. By inserting the protruding portion into three slits having a width that can be inserted with a predetermined play, the protruding portion can be moved in a direction perpendicular to the photographing optical axis in the fitting recess (first lens frame). .

  In this lens barrel (lens alignment mechanism), for example, a first lens frame in which a first lens is fitted and held in advance in a first holding portion, and a second lens frame in which a second lens and a third lens are held in advance. And in a state where the second lens frame is fitted in the fitting recess of the first lens frame, the second lens frame is two-dimensionally oriented in a direction perpendicular to the photographing optical axis using a predetermined alignment device. The second lens can be aligned with respect to the first lens by finely adjusting the position and filling the predetermined gap with an adhesive at the adjusted position and fixing the second lens frame.

  However, in the lens barrel (lens aligning mechanism) described above, the movement amount of the optical axis correction lens group viewed in the direction orthogonal to the photographing optical axis is expressed in two dimensions, whereas the second lens frame has It can be moved in the direction perpendicular to the photographing optical axis within the fitting recess (first lens frame) by three protrusions and three slits provided at equal intervals in the circumferential direction. For this reason, the movement amount and direction of the optical axis correction lens group do not coincide with the movement amount and direction given to the optical axis correction lens group by the alignment member (screw or cam or the like), in other words, expressed in two dimensions. It is necessary to realize the movement amount of the optical axis correction lens group to be adjusted by adjusting the movement amount in three directions (directions in which each protrusion and each slit extend) that are equally spaced in the circumferential direction. Therefore, in order to adjust the optical axis correction lens group in an appropriate direction with an appropriate movement amount, the assumed movement amount and assumed direction of the optical axis correction lens group with respect to the movement amount in three directions are set using parameters. There is a need to. In addition, in the optical axis correction lens group, since play is provided between each protrusion and each slit, a rotation component can also be generated in addition to the linear movement in three directions. There was a problem that it was more difficult to set the movement amount and the assumed direction.

  The present invention has been made in view of the above circumstances, and provides a lens barrel capable of aligning an optical axis correction lens group with high accuracy.

The lens barrel according to claim 1 is a lens barrel provided with an optical axis correction lens group including at least one lens, and a lens holding unit for holding the optical axis correction lens group, and photographing. A support portion that supports the lens holding portion on the inside so as to be movable in a direction perpendicular to the optical axis, and a lens alignment mechanism that adjusts the position of the lens holding portion relative to the support portion in the direction perpendicular to the photographing optical axis When provided with, the lens centering mechanism includes a feeding mechanism and the pressing mechanism which supports across the lens holder in that adjustment direction to perpendicular to the photographing optical axis, the feeding mechanism portion, A support position provided on the support portion and supporting the lens holding portion is displaceable in the adjustment direction, and the pressing mechanism portion is displaceable in the adjustment direction to support the lens holding portion. Displacement member provided in the, and the displacement member An adjustment pressing member that applies an adjustment pressing force toward the feeding mechanism portion in the adjustment direction, and the adjustment pressing member moves the displacement member in a direction orthogonal to the adjustment direction together with the adjustment pressing force. A restraining pressing force that presses against the supporting portion is applied to the displacement member, and the adjustment pressing member is displaced in a direction inclined with respect to the adjustment direction on a plane including the adjustment direction and the photographing optical axis direction. By pressing the member, the adjustment pressing force and the restraining pressing force are applied to the displacement member .

  In the lens barrel according to the first aspect, the optical axis correction lens group can be aligned with high accuracy.

It is explanatory drawing which shows the imaging device 10 as an example of the apparatus or electronic device which concerns on this invention. 1 is a block diagram illustrating a configuration of an imaging device 10. FIG. It is explanatory drawing which shows the structure of the lens barrel 13 with a typical cross section, and shows a mode that it was set as the predetermined storage position. FIG. 10 is an explanatory view showing a state in which the fifth lens holding frame 45 is supported by the fifth lens support frame 46 via the lens alignment mechanism 60, (a) is a perspective view seen from the subject side, and (b) ) Is a perspective view seen from the image plane side. It is explanatory drawing shown in the top view seen from the imaging surface side that a 5th lens holding frame 45 is supported by the support frame 46 for 5th lenses via the lens alignment mechanism 60. FIG. It is explanatory drawing which shows a mode that the 5th lens holding frame 45 is supported by the support frame 46 for 5th lenses via the lens alignment mechanism 60 from the to-be-photographed object side. FIG. 7 is a plan view of a fifth lens holding frame 45 that holds a fifth lens group 35 as viewed from the subject side. It is explanatory drawing for demonstrating the structure of the adjustment cam member 69 of the feeding mechanism part 61 of the lens alignment mechanism 60, (a) image | photographs the adjustment cam member 69 in the state provided in the support frame 46 for 5th lenses. A perspective view of the optical axis OA viewed from the outside in the radial direction is shown in a perspective view, and (b) is a perspective view of the adjustment cam member 69 viewed from the inside in the radial direction. FIG. 7 is an explanatory diagram for explaining a configuration of a slider 71 of a pressing mechanism portion 62 of a lens alignment mechanism 60, wherein (a) shows an adjustment cam member 69 in a state provided on a fifth lens support frame 46 on the outside. FIG. 7B is a perspective view showing the state seen from the subject side, and FIG. 7B is a perspective view showing the adjustment cam member 69 seen from the inside and the imaging plane side. FIG. 6 is an explanatory diagram showing an enlargement of the periphery of a feeding mechanism section 61 in the lens alignment mechanism 60. It is sectional drawing obtained along the II line of FIG. It is explanatory drawing which expands and shows the periphery of the press mechanism part 62 in the lens aligning mechanism 60, and is partially broken. It is sectional drawing obtained along the II-II line | wire of FIG. It is sectional drawing obtained along the III-III line of FIG. It is explanatory drawing explaining the mode of the alignment in the 1st adjustment direction Da1 in the lens barrel 13 (lens alignment mechanism 60). FIG. 16 is an explanatory view similar to FIG. 15 for explaining a state of alignment in the second adjustment direction Da2 in the lens barrel 13 (lens alignment mechanism 60).

  Embodiments of a lens barrel according to the present invention will be described below with reference to the drawings.

  A configuration of a lens barrel 13 as an embodiment of a lens barrel according to the present invention and an imaging apparatus 10 as an embodiment of an imaging apparatus in which the lens barrel 13 is used will be described with reference to FIGS. In FIG. 3, for easy understanding, the configuration of the lens barrel 13 is shown in a schematic cross section.

  First, an imaging apparatus 10 as an example of an imaging apparatus (digital camera) using a lens barrel 13 will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the imaging apparatus 10 is provided with a lens barrel 13 having a photographing optical system 12 on the front surface of the camera body 11 (front surface when FIG. 1 is viewed from the front). In the illustrated example, the lens barrel 13 is configured as a lens barrel unit that is detachable from the camera body 11. In this specification, the optical axis in the photographic optical system 12, that is, the rotationally symmetric axis serving as the center axis position of each optical member is defined as the photographic optical system 12, that is, the photographic optical axis OA of the imaging device 10.

  The camera body 11 is provided with a power switch 14, a shutter button 15, and a mode switching dial 16 as an operation unit on the upper surface (the upper surface when FIG. 1 is viewed from the front). The power switch 14 performs an operation (starting operation) for starting the imaging device 10 and an operation (stopping operation) for stopping the imaging device 10. The shutter button 15 is a pressing operation member that is pressed down when photographing a subject. The mode switching dial 16 is used to set various scene modes, still image modes, moving image modes, and the like. Further, although not shown clearly, other operation switches 17 and a display unit 24 (display surface thereof) described later are provided on the back of the camera body 11 (see FIG. 2). The operation switch 17 is a direction indicating switch or various switches for setting various scene modes, still image modes, moving image modes, etc., and setting various menus. The display unit 24 displays an image based on the captured image data or the image data recorded on the recording medium.

  In the imaging device 10, the image data of the subject image received by the light receiving surface 22 a (see FIG. 3 and the like) of the imaging element 22 described later through the imaging optical system 12 is recorded by the pressing operation of the shutter button 15. The photographing optical system 12 has a five-group configuration as will be described later (see FIG. 3). The lens barrel 13 is movable (advanced / retracted) between a predetermined storage position and a predetermined imaging standby position along the imaging optical axis OA, although it is not clearly shown. The lens barrel 13 (imaging device 10) shown in FIG. 1 and FIG. 3 is when the power is off (the power switch 14 is in the OFF state), and the photographing optical system 12 (a rectilinear barrel 41 (movable lens barrel) described later) Is the retracted position most retracted to the image plane side. Further, when the lens barrel 13 is turned on (the power switch 14 is in the ON state), a clear illustration is omitted, but from the state shown in FIGS. 1 and 3 (storage position), the photographing optical system 12 (described later). A rectilinear cylinder 41 (movable lens barrel) is extended toward the subject in the direction of the photographic optical axis OA, and becomes a photographing standby position. The lens barrel 13 (imaging device 10) may be set to be in a shooting standby state at the storage position shown in FIGS.

  As illustrated in FIG. 2, the imaging device 10 includes a control unit 21, the above-described imaging element 22, a lens barrel driving unit 23, and the above-described display unit 24. The control unit 21 performs a drive process based on operations performed on the power switch 14, the shutter button 15, the mode switching dial 16, and the operation switch 17 as an operation unit, a process for generating image data based on a signal from the image sensor 22, The control of the lens barrel drive unit 23 and the display unit 24 is controlled by a program stored in the storage unit 21a. The control unit 21 acquires an image with the imaging element 22 via the photographing optical system 12 and appropriately displays the image on the display unit 24 provided on the rear surface side of the camera body 11. The imaging element 22, the lens barrel drive unit 23, and the display unit 24 are supplied with electric power from a battery (not shown) via the control unit 21, and can execute each operation.

  The image sensor 22 is configured by a CCD (charge coupled device) image sensor, a CMOS image sensor, or the like. The image sensor 22 converts an object image formed on the light receiving surface 22a (see FIG. 3 and the like) through the photographing optical system 12 into an electric signal (image data) and outputs the electric signal. The output electrical signal (image data) is transmitted to the control unit 21.

  The lens barrel drive unit 23 rotates with respect to the linear liner 48 as will be described later in order to shift the lens barrel 13 between the storage position (see FIGS. 1 and 3) and the photographing standby position (not shown). By rotating the tube 47, the lens holding unit that supports each optical member of the photographing optical system 12 is moved. Further, the lens barrel drive unit 23 performs focusing by driving a focus motor 49 (see FIG. 3), as will be described later.

  Next, a schematic configuration of the lens barrel 13 as an embodiment of the lens barrel according to the present invention used in the imaging apparatus 10 will be described with reference to FIG. FIG. 3 is an explanatory diagram showing a schematic cross section of the configuration of the lens barrel 13 and shows a state where the lens barrel 13 is in a predetermined storage position.

  As shown in FIG. 3, the lens barrel 13 includes a first lens group 31, a second lens group 32, a third lens group 33, a fourth lens group 34, a fifth lens group 35, a shutter / aperture unit 36, and the above-mentioned. Imaging element 22, optical element 37, rectilinear cylinder 41, second lens holding frame 42, third lens holding frame 43, fourth lens holding frame 44, fifth lens holding frame 45, fifth lens support frame 46, rotation A cylinder 47, a linear advancer 48, a focus motor 49, a base member 51, and a lens alignment mechanism 60 are provided.

  In the lens barrel 13, the first lens group 31, the second lens group 32, the third lens group 33, the fourth lens group 34, and the fifth lens group 35 are sequentially arranged from the subject (object) side. A shutter / aperture unit 36 is inserted between the third lens group 33 and the fourth lens group 34. On the image plane side of the fifth lens group 35, the optical element 37 and the imaging element 22 are disposed. The optical element 37 is configured by a low-pass filter or the like, and is provided so as to cover the light receiving surface 22a of the imaging element 22. Although not shown, the imaging element 22 is mounted on a substrate on which electronic components are mounted to form an electronic circuit unit, and the substrate is fixed to the base member 51.

  The base member 51 has a flat plate shape as a whole. Although clear illustration is omitted, the base member 51 is provided with an installation opening penetrating in the direction of the photographing optical axis OA at the center including the photographing optical axis OA. In the base member 51, the optical element 37 and the image pickup element 22 are supported by the installation opening thereof, so that the optical element 37 is provided on the subject side, and the image pickup element 22 is provided on the rear side (imaging plane side). .

  The first lens group 31 includes one or more lenses. The first lens group 31 is fixed and held at the distal end portion (the end portion on the object side) of the rectilinear cylinder 41 via a first lens holding frame 41a that holds them integrally. The first lens group 31 includes an objective lens that is disposed closest to the subject (object) in the photographing optical system 12.

  The second lens group 32 includes one or more lenses. The second lens group 32 is fixed and held on the second lens holding frame 42. Therefore, the second lens holding frame 42 functions as a lens holding unit that holds the second lens group 32. Although not shown, a second cam follower is provided on the outer peripheral surface of the second lens holding frame 42. The second cam follower protrudes from the outer peripheral surface in a radial direction (hereinafter also referred to as a radial direction) from the photographing optical axis OA. The second cam followers are provided at three positions at equal intervals in the direction of rotation about the photographing optical axis OA (hereinafter also referred to as the rotation direction). Each of the second cam followers is inserted so as to be relatively movable in the direction of the photographing optical axis OA while being in contact with each of the rectilinear key grooves (not shown), which will be described later, of the rectilinear liner 48, and the tip of the second cam follower is rotated. The cylinder 47 is inserted so as to be relatively movable while being in contact with each second cam groove (not shown) provided on the inner peripheral surface of the cylinder 47, which will be described later. The second lens holding frame 42 is provided with a focus motor 49 and a lead screw 49a that can rotate, although not clearly shown.

  The third lens group 33 is composed of one or more lenses. The third lens group 33 is fixed and held on the third lens holding frame 43. For this reason, the third lens holding frame 43 functions as a lens holding portion that holds the third lens group 33. The third lens holding frame 43 is supported by a lead screw 49a of a focus motor 49 provided on the second lens holding frame 42 via a nut mechanism or a rack mechanism, although the illustration is not clearly shown. The third lens holding frame 43 (third lens group 33) is movable in the direction of the photographing optical axis integrally with the second lens holding frame 42, and is driven by the focus motor 49. In contrast, it is movable in the direction of the photographing optical axis OA. In the present embodiment, the third lens group 33 is used as a focus lens for focusing, that is, focusing. At the time of focus adjustment, the photographic optical axis is driven by the driving force from the focus motor 49 (rotation of the lead screw 49a). The position in the OA direction is adjusted.

  The fourth lens group 34 includes one or more lenses. The fourth lens group 34 is fixed and held by a fourth lens holding frame 44. Therefore, the fourth lens holding frame 44 functions as a lens holding unit that holds the fourth lens group 34. The fourth lens holding frame 44 integrally holds the shutter / aperture unit 36. Although not shown, a fourth cam follower is provided at the rear end portion (end portion on the imaging surface side) of the outer peripheral surface of the fourth lens holding frame 44. The fourth cam followers are provided at three positions at equal intervals in the rotation direction, and protrude from the outer peripheral surface toward the outer side in the radial direction. Each of the fourth cam followers is inserted so as to be able to move in the direction of the photographing optical axis OA while being in contact with each of the rectilinear key grooves (not shown) of the rectilinear liner 48 which will be described later, and the tip thereof is a rotating cylinder. It is inserted so that it can move relatively while contacting each later-described fourth cam groove (not shown) provided on the inner peripheral surface of 47.

  The fifth lens group 35 includes one or more lenses. The fifth lens group 35 is fixed and held by a fifth lens holding frame 45. Therefore, the fifth lens holding frame 45 functions as a lens holding unit that holds the fifth lens group 35. The fifth lens holding frame 45 is supported by the fifth lens support frame 46 via the lens alignment mechanism 60 so as to be movable in a direction perpendicular to the photographing optical axis OA. Therefore, the fifth lens support frame 46 functions as a support unit that supports the fifth lens holding frame 45 as a lens holding unit so as to be movable in a direction orthogonal to the photographing optical axis OA. A fifth cam follower 46c is provided at the rear end portion (end portion on the imaging surface side) of the outer peripheral surface of the fifth lens support frame 46 (see FIG. 4 and the like). The fifth cam followers 46c are provided at three positions at equal intervals in the rotation direction, and project outward from the outer peripheral surface in the radial direction (see FIG. 5 and the like). Each fifth cam follower 46c is inserted so as to be able to move relatively in the direction of the photographing optical axis OA while being in contact with each straight key groove (not shown), which will be described later, of the straight liner 48, and the tip thereof rotates. The cylinder 47 is inserted so as to be relatively movable while being in contact with later-described fifth cam grooves (not shown) provided on the inner peripheral surface of the cylinder 47. The lens alignment mechanism 60 provided there and the configuration around it will be described in detail later.

  The shutter / aperture unit 36 integrally held by the fourth lens holding frame 44 includes a shutter and an aperture stop. The first lens group 31 to the fifth lens group 35 (including the shutter / aperture unit 36) constitute the photographing optical system 12 as a zoom lens having a variable focal length. The imaging position of the photographic optical system 12, that is, the image plane on which the subject image is formed by the first lens group 31 to the fifth lens group 35 (including the shutter / aperture unit 36) (as viewed in the direction of the photographic optical axis OA). The light receiving surface 22a of the imaging element 22 (electronic circuit unit) described above is disposed on the imaging surface side of the five lens groups 35. The optical axis in the photographic optical system 12, that is, the rotational symmetry axis that is the central axis position of the first lens group 31 to the fifth lens group 35 is the above-described photographic optical axis OA of the photographic optical system 12, that is, the lens barrel 13. (Lens optical axis).

  The rectilinear cylinder 41 that holds the first lens group 31 of the photographing optical system 12 via the first lens holding frame 41a has a cylindrical shape as a whole. The rectilinear cylinder 41 functions as a lens holding portion that holds the first lens group 31 in cooperation with the first lens holding frame 41a. Although not shown, a first cam follower is provided at the rear end portion (end portion on the image forming plane side) on the inner peripheral surface of the rectilinear cylinder 41. The first cam followers are provided at three positions at equal intervals in the rotation direction, and project from the inner peripheral surface of the rectilinear cylinder 41 toward the inside in the radial direction. Each first cam follower is inserted such that its tip is in contact with each later-described first cam groove (not shown) provided on the outer peripheral surface of the rotary cylinder 47 so as to be relatively movable. Further, a rectilinear groove 41b extending in the direction of the photographing optical axis OA is provided on the inner peripheral surface of the rectilinear cylinder 41. A key portion 48b, which will be described later, of the rectilinear liner 48 is inserted into the rectilinear groove 41b so as to be relatively movable in the direction of the photographing optical axis OA while being in contact with each other. The rotary cylinder 47 is fitted inside the linear cylinder 41, and the linear liner 48 is fitted inside thereof.

  The rectilinear liner 48 has a cylindrical shape as a whole, and is fixed to the base member 51 so as to surround the above-described installation opening. For this reason, the rectilinear liner 48 is prevented from moving with respect to the base member 51 even when the rotary cylinder 47 is rotated as will be described later. The straight liner 48 is provided with a flange portion 48a at the tip (end on the subject side). The flange portion 48a is formed by projecting the distal end portion of the linear advancer 48 outward in the radial direction over the entire circumference. The flange portion 48a is provided with a key portion 48b. The key portion 48 b is formed to protrude in the radial direction from the outer peripheral surface of the flange portion 48 a and is inserted into a rectilinear groove 41 b provided on the inner peripheral surface of the rectilinear tube 41. For this reason, the rectilinear liner 48 inserts the key portion 48b into the rectilinear groove 41b, thereby restricting the rotation of the rectilinear cylinder 41 around the photographic optical axis OA and the relative movement of the rectilinear cylinder 41 in the photographic optical axis OA direction. Movement is possible. Therefore, the rectilinear liner 48 functions as a guide member that guides the movement of the rectilinear cylinder 41 as the lens holding portion in the direction of the photographing optical axis OA.

  The straight liner 48 is provided with a straight key groove on the peripheral wall portion (not shown). The rectilinear key grooves are provided at three positions at equal intervals in the rotation direction, and are formed to extend in the direction of the photographing optical axis OA while penetrating the peripheral wall portion in the radial direction. A second lens holding frame 42, a fourth lens holding frame 44, and a fifth lens support frame 46 are fitted on the inner periphery of the linearly moving liner 48. Although not shown in the drawings, the linearly moving key grooves thereof are not illustrated. The second cam followers of the second lens holding frame 42, the fourth cam followers of the fourth lens holding frame 44, and the fifth cam followers 46c of the fifth lens support frame 46 (see FIG. 4 and the like) are passed. The straight keyways allow the second cam followers, the fourth cam followers, and the fifth cam followers 46c that are passed therethrough to move in the direction of the photographing optical axis OA, and the rotation direction about the photographing optical axis OA. Restrict movement to From this, the rectilinear liner 48 has a second lens holding frame 42 (third lens holding frame 43 provided thereon), a fourth lens holding frame 44 and a fifth lens holding frame 45 (fifth lens) as lens holding portions. It functions as a guide member for guiding the movement of the lens support frame 46) in the direction of the photographing optical axis OA. A rotating cylinder 47 is provided on the outer periphery of the linear advancer 48.

  The rotating cylinder 47 has a cylindrical shape as a whole. The rotary cylinder 47 is provided around the rectilinear liner 48 inside the rectilinear cylinder 41, and is sandwiched between the flange portion 48a of the rectilinear liner 48 and the base member 51 in the direction of the photographing optical axis OA. The rotating cylinder 47 can be rotated relative to the base member 51, that is, the rectilinear liner 48, around the photographing optical axis OA while fixing the position in the photographing optical axis OA direction. A gear portion 47 a is formed at a base end portion (an end portion on the imaging surface side) on the outer peripheral surface of the rotating cylinder 47. The gear portion 47a is formed by arranging a plurality of teeth extending in the direction of the photographic optical axis OA in parallel with each other along the rotational direction around the photographic optical axis OA on the inner peripheral surface of the rotating cylinder 47, although not clearly shown. Has been. The gear portion 47a meshes with an output gear of a drive motor (not shown) of a lens barrel drive unit 23 (see FIG. 2) fixedly provided on the base member 51. For this reason, the rotary cylinder 47 is rotationally driven with respect to the base member 51 and the rectilinear liner 48 when the driving force of the driving motor (lens barrel driving unit 23) is transmitted to the gear.

  Further, on the inner peripheral surface of the rotating cylinder 47, a second cam groove, a fourth cam groove, and a fifth cam groove are provided although not clearly shown. The second cam groove, the fourth cam groove, and the fifth cam groove are independently displaced from each other in the direction of the photographing optical axis OA while surrounding the photographing optical axis OA (inclination with respect to the direction of the photographing optical axis OA). Have been formed). The second cam groove, the fourth cam groove, and the fifth cam groove are provided at three positions at equal intervals in the rotation direction. Each of the second cam grooves is a cam groove for moving the second lens holding frame 42, and can be moved relatively while being in contact with each of the second cam followers provided therein. Each of the fourth cam grooves is a cam groove for moving the fourth lens holding frame 44, and can be relatively moved while being in contact with each of the fourth cam followers provided therein. Each fifth cam groove is a cam groove for moving the fifth lens support frame 46 (fifth lens holding frame 45), and is in contact with each fifth cam follower 46c (see FIG. 4 etc.) provided there. However, it is possible to move relatively. For this reason, when the rotary cylinder 47 rotates with respect to the rectilinear liner 48 with the photographing optical axis OA as the central axis, the second cam grooves and the fourth lens of the second lens holding frame 42 with respect to the rectilinear key grooves of the rectilinear liner 48. The intersection positions of the fourth cam grooves of the holding frame 44 and the fifth cam grooves of the fifth lens support frame 46 move in the direction of the photographing optical axis OA.

  Further, a first cam groove is provided on the outer peripheral surface of the rotary cylinder 47 although it is not clearly shown. The first cam groove is formed so as to surround the photographing optical axis OA and be displaced in the direction of the photographing optical axis OA (inclined with respect to the photographing optical axis OA direction). The first cam grooves are provided at three positions at equal intervals in the rotation direction. Each first cam groove is a cam groove for moving the rectilinear cylinder 41 with respect to the rotating cylinder 47, and can be moved relatively while being in contact with each first cam follower provided therein. Here, when the key portion 48b of the rectilinear liner 48 is inserted into the rectilinear groove 41b of the rectilinear cylinder 41, the rotation around the photographic optical axis OA is restricted with respect to the rectilinear liner 48 in the direction of the photographic optical axis OA. Relative movement is possible.

  Therefore, when the rotary cylinder 47 is rotationally driven with respect to the base member 51 and the rectilinear liner 48, the second lens holding frame 42 advances and retreats so as to follow the cam locus of each second cam groove, and the fourth lens is held. The frame 44 advances and retreats so as to follow the cam locus of each fourth cam groove, and the fifth lens support frame 46 (the fifth lens holding frame 45) advances and retreats so as to follow the cam locus of each fifth cam groove. The rectilinear cylinder 41 advances and retreats so as to follow the cam locus of each first cam groove.

  Thereby, in the lens barrel 13 (imaging device 10), the driving force of a drive motor (not shown), not shown, of the lens barrel drive unit 23 (see FIG. 2) is appropriately transmitted to the gear portion 47a via the gear. Then, the rotary cylinder 47 is rotated with respect to the rectilinear liner 48, whereby the first lens group 31, the second lens group 32, the third lens group 33, and the fourth lens group 34 (shutter / The aperture unit 36) and the fifth lens group 35 perform a zooming operation in a predetermined manner.

  Here, in the photographing optical system 12 of the present embodiment, the fifth lens group 35 is set as an optical axis correction lens group. The optical axis correction lens group is a photographic optical axis OA from the viewpoint of preventing the image plane from being tilted or degrading the image quality and enabling the photographic optical system 12 to obtain more appropriate imaging performance. The lens group can be adjusted so that the position viewed in the direction orthogonal thereto can be adjusted with high accuracy, so-called centering. Therefore, in the lens barrel 13 (imaging device 10) of the present embodiment, the fifth lens holding frame 45 that holds the fifth lens group 35 is connected to the fifth lens support frame 46 via the lens alignment mechanism 60. By being supported, the position of the fifth lens holding frame 45, that is, the fifth lens group 35, as viewed in the direction perpendicular to the photographing optical axis OA can be adjusted with high accuracy. Hereinafter, a support structure of the fifth lens holding frame 45 through the lens alignment mechanism 60 in the fifth lens support frame 46 will be described with reference to FIGS. 4 to 16. Hereinafter, the radial direction described above is referred to as a radial direction with respect to the photographing optical axis OA.

  FIG. 4 is an explanatory view showing a state in which the fifth lens holding frame 45 is supported by the fifth lens support frame 46 via the lens alignment mechanism 60, and (a) is a perspective view seen from the subject side. (B) is a perspective view seen from the image plane side. FIG. 5 is an explanatory diagram showing a state in which the fifth lens holding frame 45 is supported by the fifth lens support frame 46 via the lens aligning mechanism 60 in a plan view seen from the image plane side. FIG. 6 is an explanatory diagram showing a state in which the fifth lens holding frame 45 is supported by the fifth lens support frame 46 via the lens alignment mechanism 60 as seen from the subject side. FIG. 7 is a plan view of the fifth lens holding frame 45 that holds the fifth lens group 35 as viewed from the subject side. FIG. 8 is an explanatory view for explaining the configuration of the adjustment cam member 69 of the feeding mechanism portion 61 of the lens alignment mechanism 60, and (a) is an adjustment cam in a state provided on the fifth lens support frame 46. A perspective view of the member 69 as seen from the outside in the radial direction with respect to the photographic optical axis OA is shown in a perspective view, and (b) shows a perspective view of the adjustment cam member 69 as seen from the inside in the radial direction. FIG. 9 is an explanatory diagram for explaining the configuration of the slider 71 of the pressing mechanism 62 of the lens alignment mechanism 60, and FIG. 9A is an adjustment cam member 69 in a state of being provided on the fifth lens support frame 46. Is a perspective view of the adjustment cam member 69 viewed from the image forming surface side and is shown in a perspective view. FIG. 10 is an explanatory view showing, in an enlarged manner, the periphery of the feeding mechanism portion 61 in the lens alignment mechanism 60. 11 is a cross-sectional view taken along the line II in FIG. FIG. 12 is an explanatory view showing the periphery of the pressing mechanism portion 62 in the lens alignment mechanism 60 in an enlarged manner and partially broken away. 13 is a cross-sectional view taken along the line II-II in FIG. 14 is a cross-sectional view taken along line III-III in FIG. FIG. 15 is an explanatory diagram for explaining the state of alignment in the first adjustment direction Da1 in the lens barrel 13 (lens alignment mechanism 60). FIG. 16 is an explanatory view similar to FIG. 15 illustrating the state of alignment in the second adjustment direction Da2 in the lens barrel 13 (lens alignment mechanism 60). In FIGS. 15 and 16, the fifth lens support frame 46 is omitted for easy understanding.

  The lens aligning mechanism 60 is a fifth lens that can move the position of the fifth lens holding frame 45 that holds the fifth lens group 35 in the direction of the photographing optical axis OA by the rotating cylinder 47 inside the linear liner 48. The support frame 46 can be adjusted in a direction orthogonal to the photographing optical axis OA. The lens alignment mechanism 60 basically supports and adjusts the fifth lens holding frame 45 with the feeding direction 61 and the pressing mechanism 62 sandwiched in the adjustment direction Da as shown in FIGS. By changing the support position in the direction Da, the position of the fifth lens holding frame 45 in the direction orthogonal to the photographing optical axis OA can be adjusted. The adjustment direction Da is on a plane orthogonal to the photographing optical axis OA and passes through the photographing optical axis OA. This is because the lens alignment mechanism 60 sets the position of the optical axis of the optical axis correction lens group (fifth lens group 35) viewed in the direction orthogonal to the imaging optical axis OA in the imaging optical system 12. This is because the so-called optical axis correction lens group is aligned with the optical axis OA.

  In the present embodiment, the lens alignment mechanism 60 sets a first adjustment direction Da1 and a second adjustment direction Da2 that are orthogonal to each other on a plane orthogonal to the photographing optical axis OA as the adjustment direction Da (FIG. 5). To FIG. 7 etc.). Therefore, in this embodiment, the lens alignment mechanism 60 includes the first feeding mechanism portion 611 and the first pressing mechanism portion 621 corresponding to the first adjustment direction Da1, and the second feeding mechanism corresponding to the second adjustment direction Da2. Part 612 and second pressing mechanism part 622. That is, the first feeding mechanism portion 611 and the first pressing mechanism portion 621 support the fifth lens holding frame 45 sandwiched in the first adjustment direction Da1, and change the support position in the first adjustment direction Da1. The position of the fifth lens holding frame 45 in the first adjustment direction Da1 can be adjusted. Further, the second feeding mechanism unit 612 and the second pressing mechanism unit 622 support the fifth lens holding frame 45 with the second adjustment direction Da2 interposed therebetween, and change the support position in the second adjustment direction Da2. The position of the fifth lens holding frame 45 in the second adjustment direction Da2 can be adjusted. For this reason, the lens alignment mechanism 60 adjusts the position of the fifth lens holding frame 45 that holds the fifth lens group 35 in a direction perpendicular to the photographing optical axis OA with respect to the fifth lens support frame 46. Can do.

  Here, with respect to the fifth lens holding frame 45 and the fifth lens support frame 46, the first feeding mechanism portion 611 and the first pressing mechanism portion 621, and the second feeding mechanism portion 612 and the second pressing mechanism portion 622 are provided. The configuration and operation are basically the same except that the adjustable direction is the first adjustment direction Da1 or the second adjustment direction Da2. For this reason, below, a structure and a basic effect | action are demonstrated only using the feeding mechanism part 61, the press mechanism part 62, and the adjustment direction Da. In each member, when the description is made in correspondence with the first adjustment direction Da1 and the second adjustment direction Da2, the first pressing mechanism portion 611 in the feeding mechanism portion 61 and the second pressing mechanism portion in the pressing mechanism portion 62. As in the case of 622, n is added to the beginning of the word (n is 1 or 2), and n is added to the end of the code. The adjustment direction Da is the radial direction with respect to the photographing optical axis OA at the position where the feeding mechanism portion 61 and the pressing mechanism portion 62 are provided, the side toward the photographing optical axis OA is the positive side, and the fifth lens support frame 46 is provided. The side going to the outside is the negative side. In the following, in the feeding mechanism unit 61 and the pressing mechanism unit 62, a direction parallel to the photographic optical axis OA is referred to as a photographic optical axis direction Do, and the direction on the photographic optical axis direction Do is indicated on the subject side (in the drawing). The arrow indicates the positive side) and the image plane side. Furthermore, in the following, as shown in FIG. 9 and FIG. 12 and the like, the direction perpendicular to the photographing optical axis direction Do and the adjustment direction Da in the pressing mechanism 62 (the slider receiving portion 64 described later) is defined as a positioning direction Dp. In FIG. 12, the left side is the positive side and the right side is the negative side. The positioning direction Dp is a tangent to a circle centering on the central axis (imaging optical axis OA) of the fifth lens support frame 46 (a support hole 46d described later) at the position where the pressing mechanism 62 is provided. Direction.

  As shown in FIGS. 4 to 6, the fifth lens support frame 46 provided with the lens alignment mechanism 60 has a large diameter portion 46 a and a small diameter portion 46 b. The large-diameter portion 46a is provided with the above-described fifth cam followers 46c protruding from the outer peripheral surface toward the outer side in the radial direction with respect to the photographing optical axis OA at three equally spaced positions as seen in the rotation direction. In the fifth lens support frame 46, the imaging surface side of the large diameter portion 46a is open. Further, in the fifth lens support frame 46, a support hole 46d (see FIGS. 3 and 4) for supporting the fifth lens holding frame 45 is provided in the center of the small diameter portion 46b. The support hole 46d has an inner diameter having a play (interval) that allows the fifth lens holding frame 45 to be supported to move in a direction (radial direction) orthogonal to the photographing optical axis OA.

  The small-diameter portion 46b of the fifth lens support frame 46 is provided with two cam receiving portions 63 and two slider receiving portions 64. The both cam receiving portions 63 are portions that support an adjusting cam member 69 (described later) as the feeding mechanism portion 61 (see FIG. 10 and the like). The two cam receivers 63 are provided on the front edge (subject side) of the small-diameter portion 46b and face the support hole 46d, and have a plate shape extending in the photographing optical axis direction Do (the photographing optical axis OA direction). Present. The both cam receiving portions 63 are spaced apart from each other by a predetermined distance when viewed in the inner peripheral direction of the support hole 46d (the direction around the photographing optical axis OA) so as to correspond to a contact end portion 65 to be described later of the fifth lens holding frame 45. Is provided. In the present embodiment, both cam receiving portions 63 are provided corresponding to two adjustment directions Da set in the lens alignment mechanism 60, that is, the first adjustment direction Da1 and the second adjustment direction Da2.

  In each of the cam receivers 63, as shown in FIGS. 10 and 11, a support recess 63a formed to be recessed in the radial direction (adjustment direction Da) of the fifth lens support frame 46 (support hole 46d); And a shaft hole 63c penetrating through the center of the back wall 63b of the support recess 63a. The support recess 63a and the shaft hole 63c have a direction (radial direction) in which the axial direction is directed to the photographing optical axis OA along a plane orthogonal to the photographing optical axis OA. Further, the inner wall surface 63b is orthogonal to the axial direction of the support recess 63a. The back wall surface 63b is provided with a rotation restricting portion (not shown).

  As shown in FIGS. 4 to 6, the two slider receiving portions 64 are places where a slider 71 described later as the pressing mechanism portion 62 is provided. The two slider receivers 64 are provided on the front edge (subject side) of the small-diameter part 46b and facing the support hole 46d, and are provided at positions facing the cam receivers 63 in the adjustment direction Da. . Both slider receiving portions 64 are formed to be recessed toward the image plane in the photographing optical axis direction Do while extending in the radial direction (adjustment direction Da) of the fifth lens support frame 46 (support hole 46d), which will be described later. The size is such that the slider 71 can be movably received in the radial direction (adjustment direction Da). In the present embodiment, both slider receivers 64 are provided corresponding to two adjustment directions Da set in the lens alignment mechanism 60, that is, the first adjustment direction Da1 and the second adjustment direction Da2. For this reason, the two cam receivers 63 and the two slider receivers 64 are arranged at an interval of approximately 90 degrees on the circumference centered on the central axis of the fifth lens support frame 46 (support hole 46d). Yes.

  Each slider receiving portion 64 includes a bottom wall portion 64a and a spring seat 64b (see FIG. 13), a pressed portion 64c, and a positioning portion 64d (see FIG. 14). As shown in FIG. 13, the bottom wall portion 64a forms a wall portion on the imaging surface side in each slider receiving portion 64, and the upper surface on the subject side is the fifth lens support frame 46 (support hole 46d). ) Is a flat surface orthogonal to the photographing optical axis direction Do.

  The spring seat 64b is a location to which a later-described coil spring 72 (its one end winding portion 72a) as the pressing mechanism portion 62 is addressed. In the spring seat 64b, the inner edge of the small-diameter portion 46b includes the positioning direction Dp and is displaced outward (negative side) in the adjustment direction Da from the subject side in the photographing optical axis direction Do toward the image plane. It is configured as a flat surface for inclining. In other words, the spring seat 64b is inclined at an angle (θ) with respect to the photographing optical axis direction Do. A mounting protrusion 64e is provided on the spring seat 64b. The mounting protrusion 64e has a cylindrical shape protruding in a normal direction with respect to the flat spring seat 64b, and has a size that can be inserted inward of a coil spring 72 (its one end winding portion 72a) described later. ing. For this reason, the mounting protrusion 64e has a central axis inclined at an angle (θ) with respect to the adjustment direction Da. The attachment protrusion 64e is in a positional relationship facing an attachment protrusion 71b described later provided on the slider 71 in a state where the slider 71 described later is appropriately provided on the slider receiving portion 64.

  As shown in FIG. 14, the pressed portion 64c and the positioning portion 64d are provided to face each other in the positioning direction Dp. The pressed portion 64c is a flat surface including the adjustment direction Da, and is displaced toward the imaging plane in the photographing optical axis direction Do as it moves toward the positive side in the positioning direction Dp (the positioning portion 64d side). Inclined. As will be described later, when the slider 71 is appropriately provided on the slider receiving portion 64, the pressed portion 64c has a positional relationship facing a restraint pressing portion 71d (see FIG. 9 and the like) described later in the photographing optical axis direction Do. Has been.

  The positioning portion 64d is formed to protrude in the positioning direction Dp negative side (the pressed portion 64c side), and is semicircular (curved surface) when viewed in a cross section including the positioning direction Dp and the photographing optical axis direction Do. ). The positioning part 64d may be hemispherical as long as it forms a curved surface on the negative side in the positioning direction Dp. As will be described later, when the slider 71 is appropriately provided on the slider receiving portion 64, the positioning portion 64d is positioned so as to face a positioning pressing portion 71e described later in the positioning direction Dp.

  Each slider receiving portion 64 is provided with a hook 71g (see FIG. 9) of a slider 71, which will be described later, and a hooking portion that can be hooked in the photographing optical axis direction Do, though not shown clearly. . The hooking part is detached from the slider receiving part 64 while allowing the slider 71 provided in the slider receiving part 64 to move in the adjustment direction Da in cooperation with the bottom wall part 64a (see FIG. 13). To prevent. The fifth lens holding frame 45 is provided in the support hole 46d of the fifth lens support frame 46 provided with the slider receiving portions 64 and the cam receiving portions 63 (see FIG. 3 and the like).

  The fifth lens holding frame 45 holds a fifth lens group 35 set as an optical axis correction lens group, as shown in FIG. The fifth lens holding frame 45 has a disk shape that can be received in the support hole 46d of the fifth lens support frame 46 (see FIGS. 3 to 6 and the like), and holds the fifth lens group 35 in the center. A holding hole 45a is provided. The fifth lens holding frame 45 is arranged in a direction (set adjustment direction Da) orthogonal to the photographing optical axis OA in the support hole 46d of the fifth lens support frame 46 for eccentricity adjustment (alignment). The outer diameter dimension has a play (interval) that allows displacement.

  The fifth lens holding frame 45 is provided with a contact end portion 65 as the feeding mechanism portion 61 and a pair of pins 66 as the pressing mechanism portion 62 at two locations. The contact end portion 65 protrudes in the radial direction (adjustment direction Da) from the outer peripheral surface of the fifth lens holding frame 45, and the protruding end 65a has a pointed shape (see FIG. 11 and the like). The contact end portion 65 protrudes from an adjustment cam member 69 (described later) held by each cam receiving portion 63 when viewed in the circumferential direction of the fifth lens support frame 46 (a direction around the photographing optical axis OA). It is provided at a predetermined interval so that 65a becomes a predetermined position (see FIG. 5 and the like). In the present embodiment, one (first contact end 651) has a protruding end 65a positioned on the first adjustment direction Da1, and the other (second contact end 652) has a protruding end 65a. Is positioned in the second adjustment direction Da2 (see FIG. 6 and the like). In this embodiment, the protruding end 65a has a pointed shape. However, in order to facilitate the rotation operation of the adjusting cam member 69 described later, the adjusting cam member 69 that is contacted as described later is adjusted. Anything that suppresses friction with the cam surface 69d is acceptable, and the present invention is not limited to this embodiment.

  The pair of pins 66 are provided in pairs with the contact end portion 65 in the set adjustment direction Da. The pair of pins 66 captures photographing light from the outer peripheral surface of the fifth lens holding frame 45 toward the subject side from a flange portion 66a (see FIGS. 7, 13, and 14) protruding in the radial direction (adjustment direction Da). It has a hollow cylindrical shape extending in the axial direction Do, and has the same size. The pair of pins 66 has a positional relationship in which a line segment L1 passing through the center of each pair is orthogonal to the adjustment direction Da. For this reason, in the pair of pins 66, two line segments L2 (planes) including both tangents are parallel to each other and orthogonal to the adjustment direction Da. Therefore, in the pair of pins 66, two line segments L2 (plane) including both tangent lines and a line segment L1 passing through the center of each other are set on a plane including the positioning direction Dp and the photographing optical axis direction Do. ing.

  The fifth lens holding frame 45 is provided with four pressing receiving portions 67. Each of the pressing receiving portions 67 protrudes from the outer peripheral surface of the fifth lens holding frame 45 in the radial direction with respect to the photographing optical axis OA, and the pressing receiving surface 67a on the image surface side (back side when viewed from the front in FIG. 7). Is provided. The pressing receiving surface 67a (the pressing receiving portion 67) is a pressing force (optical axis side pressing force) in the photographing optical axis direction Do from an optical axis side pressing member 68 (see FIG. 4B, FIG. 5, etc.) described later. Pressure). The four pressing receiving portions 67 are arranged in the circumferential direction of the fifth lens support frame 46 (around the photographing optical axis OA so as to form a pair with the photographing optical axis OA interposed therebetween when viewed in a plane orthogonal to the photographing optical axis OA. Are provided at a predetermined interval as viewed in the direction of As will be described later, each of the four pressing receiving portions 67 has a predetermined pressing receiving surface 67a with respect to the two optical axis side pressing members 68 provided on the fifth lens support frame 46 (the large diameter portion 46a). (See FIG. 4B and FIG. 5 etc.). In the present embodiment, the four pressing receiving portions 67 have a positional relationship that is point-symmetric with respect to the photographing optical axis OA when viewed in a plane orthogonal to the photographing optical axis OA (the lens optical axis of the fifth lens group 35). Has been.

  As shown in FIGS. 4B and 5, the fifth lens holding frame 45 is pressed against the fifth lens support frame 46 by the two optical axis side pressing members 68. Each optical axis side pressing member 68 applies a pressing force (optical axis side pressing force) toward the subject in the photographing optical axis direction Do to the fifth lens holding frame 45, and is long in this embodiment. It is formed of a plate-like spring member. Each optical axis side pressing member 68 is provided with a center position seen in the longitudinal direction fixed to the large diameter portion 46a of the fifth lens support frame 46 from the imaging plane side by a fixing member 68a. The end 68b presses the pressing receiving surface 67a (see FIG. 7) of the pressing receiving portion 67 of the fifth lens holding frame 45 toward the subject. In the fifth lens holding frame 45, when the optical lens side pressing members 68 are pressed against the fifth lens support frame 46 in this way, the lens optical axis of the fifth lens group 35 to be held becomes the photographing optical axis direction Do. These are matched (parallel to the photographing optical axis OA). The optical axis side pressing member 68 only needs to have the above-described function, and is a compression coil spring that exhibits an elastic force that resists an operation to be compressed, or an extension that exhibits an elastic force that resists an operation to be extended. A coil spring, rubber or the like may be used, and is not limited to the configuration of the present embodiment.

  The feeding mechanism portion 61 that supports the fifth lens holding frame 45 has an adjustment cam member 69. As shown in FIG. 8, the adjustment cam member 69 has a stepped columnar shape in which a large diameter portion 69a and a small diameter portion 69b having the same axis (hereinafter referred to as a central axis MA) are continuous. In the adjustment cam member 69, the large-diameter portion 69a is sized so that it can be rotatably inserted into the support recess 63a of the cam receiving portion 63 of the fifth lens support frame 46 (see FIG. 10). ). The back surface of the large-diameter portion 69a (the surface on the near side when FIG. This is a flat seat surface 69c that can be used (see FIG. 11). Further, in the adjustment cam member 69, the small diameter portion 69b can be rotatably fitted into the shaft hole 63c of the cam receiving portion 63 of the fifth lens support frame 46 (see FIGS. 4 and 11). .

  For this reason, in the adjustment cam member 69, the small diameter portion 69b functions as a rotation shaft for the cam receiving portion 63 (its shaft hole 63c). The rotation axis, that is, the central axis MA of the small-diameter portion 69b is relative to a line segment (adjustment direction Da) connecting the contact end 65 and the photographing optical axis OA in a state where the adjustment cam member 69 is provided in the cam receiving portion 63. Thus, the positional relationship is shifted (offset) by a predetermined dimension δ while maintaining a parallel state (see FIG. 10).

  In the adjustment cam member 69, an adjustment cam surface 69d is provided on the surface of the large-diameter portion 69a (the front side when FIG. 8B is viewed from the front). The adjustment cam surface 69d is viewed in the rotational direction about the central axis MA, and is viewed in the height direction of the large-diameter portion 69a viewed in the direction of the central axis MA, that is, in the direction of the central axis MA based on the seating surface 69c. Further, it is defined by a spiral plane so as to continuously change the thickness dimension of the large-diameter portion 69a. In other words, the adjustment cam surface 69d is a flat surface that is inclined with respect to the direction of the central axis MA, and is gradually spaced from the seat surface 69c that is a plane orthogonal to the central axis MA, that is, the position viewed in the direction of the central axis MA. To change. The adjustment cam surface 69d has the same thickness dimension (interval with the seat surface 69c) regardless of the position in the radial direction with respect to the center axis MA at the same position as viewed in the rotation direction about the center axis MA. Has been.

  In the adjustment cam member 69, a rotation restricting convex portion 69e is provided on the back side of the large diameter portion 69a. The rotation restricting convex portion 69e protrudes in the direction of the central axis MA from the back surface (seat surface 69c) of the large diameter portion 69a. The rotation restricting convex portion 69e is a rotation restricting portion of the cam receiving portion 63 in a state where the large diameter portion 69a is inserted into the support recess 63a of the cam receiving portion 63 of the fifth lens support frame 46 (see FIG. 10 and the like). (Not shown) and a rotational direction centering on the central axis MA. For this reason, the range in which the adjustment cam member 69 can rotate within the cam receiving portion 63 is restricted by the rotation restricting convex portion 69e and the rotation restricting portion of the cam receiving portion 63. This rotatable range is set in consideration of the range that can be displaced in the adjustment direction Da that is set at the support position by the protruding end 65a of the contact end portion 65 and the adjustment cam surface 69d that contact each other, as will be described later. ing.

  Furthermore, in the adjustment cam member 69, an operation hole 69f is provided at the protruding end of the small diameter portion 69b. The operation hole 69f is a recess into which a jig (tool) for rotating the adjustment cam member 69 can be fitted. In this embodiment, the operation hole 69f is a long hole having a rectangular shape in front view. .

  The pressing mechanism 62 that supports the fifth lens holding frame 45 in cooperation with the feeding mechanism 61 (adjustment cam member 69) includes a slider 71 and a coil spring 72 (see FIGS. 4 and 5). As shown in FIG. 6 and the like, the slider 71 is provided on the slider receiving portion 64 facing the cam receiving portion 63 in the adjustment direction Da in the fifth lens support frame 46. Although the slider 71 is not clearly shown in the drawings, the slider 71 has a play that allows it to move in the adjustment direction Da (the radial direction of the fifth lens support frame 46 (support hole 46d)) within the slider receiving portion 64 (see FIG. It is set as the dimension which has a space | interval. As shown in FIG. 9, the slider 71 includes a spring receiving surface 71a, a mounting protrusion 71b, a guide groove 71c, a restraining pressing portion 71d, a positioning pressing portion 71e, a mounting surface 71f, and a hook 71g.

  The spring receiving surface 71a constitutes a place where a coil spring 72 (other end seat winding portion 72b) described later is pressed, and is a flat surface. The spring receiving surface 71a includes a positioning direction Dp in a state in which the slider 71 is appropriately provided on the slider receiving portion 64, and moves in the adjustment direction Da from the subject side to the imaging surface side in the photographing optical axis direction Do. The inclination is displaced outward (see FIG. 13 and the like). The spring receiving surface 71a has an inclination angle with respect to the photographic optical axis direction Do that the spring seat 64b makes with respect to the photographic optical axis direction Do (see symbol θ in FIG. 13), that is, the mounting projection 64e has an adjustment direction Da. It is assumed to be equal to the angle formed by the central axis (see the symbol θ in FIG. 13). A mounting projection 71b is provided on the spring receiving surface 71a.

  The mounting protrusion 71b is provided so as to protrude in the normal direction with respect to the flat spring receiving surface 71a, and has a size dimension that can be inserted into a coil spring 72 (other end seat winding portion 72b) described later. (See FIG. 13 and the like). For this reason, the attachment protrusion 71b is configured such that the central axis is inclined at an angle (see reference sign θ in FIG. 13) with respect to the adjustment direction Da. The mounting projection 71b is in a positional relationship facing the mounting projection 64e provided on the slider receiving portion 64 in a state where the slider 71 is appropriately provided on the slider receiving portion 64 (see FIG. 13 and the like).

  The guide groove 71c is provided on the lower surface (the surface on the imaging surface side in a state where the slider 71 is appropriately provided on the slider receiving portion 64). The guide groove 71c is formed such that the lower surface of the slider 71 is partially recessed toward the upper surface side (subject side) in the photographing optical axis direction Do, and has a predetermined size in the adjustment direction Da (radial direction). The slider 71 is provided across the positioning direction Dp while being dimensioned. For this reason, the guide groove 71c is orthogonal to the adjustment direction Da and defines a guide surface 71h that forms a pair with a predetermined dimension when viewed in the adjustment direction Da. The guide groove 71c allows the pair of pins 66 provided on the fifth lens holding frame 45 to move relative to the positioning direction Dp between the pair of guide surfaces 71h, and in the photographing optical axis direction. The size is such that it can be received by Do (see FIGS. 12 to 16, etc.).

  The constraining pressing portion 71d is formed to protrude from the negative side surface of the slider 71 in the positioning direction Dp to the negative side of the positioning direction Dp, and the imaging surface side is a curved surface 71i. In the present embodiment, the curved surface 71i has a circular shape centered on an axis parallel to the adjustment direction Da when viewed in a cross section including the positioning direction Dp and the photographing optical axis direction Do. The constraining pressing portion 71d may be hemispherical as long as it forms a curved surface on the imaging surface side. The restraint pressing portion 71d has a positional relationship in which the pressed portion 64c of the slider receiving portion 64 and the curved surface 71i face each other in the photographing optical axis direction Do when the slider 71 is appropriately provided on the slider receiving portion 64. (See FIG. 14).

  The positioning pressing portion 71e is formed so as to protrude from the side surface on the positive side in the positioning direction Dp of the slider 71 to the positive side in the positioning direction Dp. In this embodiment, the positioning pressing portion 71e defines each inclined surface 71j targeted with respect to a straight line parallel to the adjustment direction Da when viewed in a cross section including the positioning direction Dp and the photographing optical axis direction Do (FIG. 14). The positioning pressing portion 71e is composed of three inclined protrusions 71k that protrude toward the negative side in the positioning direction Dp, and each is provided with an inclined surface 71j. As shown in FIG. 14, the positioning pressing portion 71e is configured so that the positioning portion 64d of the slider receiving portion 64 and each inclined surface 71j are positioned in the positioning direction Dp when the slider 71 is appropriately provided on the slider receiving portion 64. The positional relationship is opposite in the direction. When viewed in a cross section including the positioning direction Dp and the imaging optical axis direction Do, the positioning pressing portion 71e forms a V-shaped recess with the inclined surface 71j that makes a pair in the imaging optical axis direction Do. The positioning part 64d of the slider receiving part 64 can be received in between.

  As shown in FIG. 9, the mounting surface 71 f is provided on the image forming surface side of the slider 71, and in a state where the slider 71 is appropriately provided on the slider receiving portion 64, the mounting surface 71 f is flat. It is considered as a surface. The hook 71g is provided at a position on the negative side of the adjustment direction Da of the mounting surface 71f so as to make a pair in the positioning direction Dp and project toward the image plane, and projecting ends projecting away from each other. Yes.

  The slider 71 has a mounting surface 71f facing the bottom wall portion 64a of the slider receiving portion 64 of the fifth lens support frame 46 (see FIG. 13) and a hooking portion (not shown) of the slider receiving portion 64. By being hooked by the pair of hooks 71g, it is possible to move in the adjustment direction Da while preventing the slider 71 from dropping off. Therefore, the slider 71 functions as a displacement member provided on the fifth lens support frame 46 (the slider receiving portion 64) as the support portion so as to be movable in the adjustment direction Da.

  In this state where the slider 71 is appropriately provided in the slider receiving portion 64, a pair of pins 66 provided in the fifth lens holding frame 45 are inserted into the guide groove 71 c of the slider 71. The fifth lens holding frame 45 is pressed toward the subject side against the large-diameter portion 46 a of the fifth lens support frame 46 by the optical axis side pressing force from each optical axis side pressing member 68. Further, in the restraint pressing portion 71d of the slider 71, the curved surface 71i and the pressed portion 64c of the slider receiving portion 64 are opposed to each other in the photographing optical axis direction Do (see FIG. 14). Furthermore, in the positioning pressing portion 71e of the slider 71, each inclined surface 71j and the positioning portion 64d of the slider receiving portion 64 face each other in the positioning direction Dp (see FIG. 14). A coil spring 72 is provided between the slider 71 and the slider receiving portion 64 (see FIGS. 4 to 6 and FIG. 13 and the like).

  As shown in FIGS. 12 and 13, etc., the coil spring 72 is formed of a spiral wire, and is provided with an annular one end wound portion 72a and another end wound portion 72b at both ends. The coil spring 72 has an inner diameter that is larger than the outer diameter of the mounting protrusion 64 e of the slider receiving portion 64 and the mounting protrusion 71 b of the spring receiving surface 71 a of the slider 71. The coil spring 72 extends most in an unloaded state, and exhibits an elastic force that resists the operation of bringing the one end end wound portion 72a on one end side and the other end end wound portion 72b on the other end side closer. In the compressed state, the coil spring 72 is provided on the slider receiving portion 64 (the fifth lens support frame 46) while the one end winding portion 72a is attached to the spring seat 64b while surrounding the mounting protrusion 64e, and the other end. The end turn portion 72b is attached to the spring receiving surface 71a and is provided on the slider 71 while surrounding the attachment protrusion 71b.

  Then, as shown in FIG. 13, the coil spring 72 applies an adjustment pressing force Fa and a restraining pressing force Fr to the slider 71 in the slider receiving portion 64. This is due to the following. The attachment protrusion 64e of the slider receiving portion 64 is connected from the subject side in the photographing optical axis direction Do as the central axis is inclined at an angle (θ) with respect to the adjustment direction Da and toward the positive side of the adjustment direction Da. It is supposed to be displaced toward the image plane side. Further, the mounting protrusion 71b of the slider 71 is inclined at an angle (θ) with respect to the adjustment direction Da in a state where the slider 71 is appropriately provided on the slider receiving portion 64, and heads toward the negative side of the adjustment direction Da. Accordingly, the lens is displaced from the imaging plane side in the photographing optical axis direction Do to the subject side. For this reason, the coil spring 72 in which the end winding part 72a surrounds the attachment protrusion 64e and the other end winding part 72b surrounds the attachment protrusion 71b has its axial direction inclined at an angle θ with respect to the adjustment direction Da. The slider receiving portion 64 (the fifth lens support frame 46) and the slider 71 are spanned. For this reason, the coil spring 72 applies a pressing force F that causes the slider 71 to tilt at an angle θ with respect to the adjustment direction Da with reference to the mounting protrusion 64e (spring seat 64b) of the slider receiving portion 64. Therefore, the slider 71 has an adjustment pressing force Fa toward the positive side of the adjustment direction Da and a restraining pressing force Fr toward the image plane in the photographing optical axis direction Do, which has a magnitude corresponding to the inclination angle θ. , Will act.

  When the constraining pressing force Fr to the image forming surface side acts on the slider 71 in this way, as shown in FIG. 14, the constraining pressing portion 71d of the slider 71 is constrained to the image forming surface side having a size corresponding thereto. The pressing force Fr ′ acts. Here, the pressed portion 64c of the slider receiving portion 64 exists on the imaging surface side of the restraining pressing portion 71d (the curved surface 71i). The pressed portion 64c is an inclined surface that includes the adjustment direction Da and is displaced toward the imaging plane side in the positioning direction Dp as it goes toward the positive side in the positioning direction Dp (the positioning portion 64d side). For this reason, when the restraining pressing portion 71d comes into contact with the pressed portion 64c, the combined force Fc of the reaction force Fo from the pressed portion 64c and the restraining pressing force Fr ′ with respect to the restraining pressing force Fr ′ is applied to the restraining pressing portion 71d. Works. As a result, the restraining pressing portion 71d tends to be displaced in the direction in which the resultant force Fc acts on the pressed portion 64c. Then, a part of the combined force Fc acts on the pressed portion 64c, that is, the slider 71 as a component force (Fp) in the positioning direction Dp positive side, so that the slider 71 is in the positioning direction Dp positive side in the slider receiving portion 64. Try to displace to.

  A positioning pressing portion 71e is provided on the positive side of the slider 71 in the positioning direction Dp, and a positioning portion 64d of the slider receiving portion 64 is opposed to the positive side of the positioning direction Dp. For this reason, when the slider 71 attempts to displace the slider receiving portion 64 toward the positive side in the positioning direction Dp, the positioning pressing portion 71e of the slider 71 contacts the positioning portion 64d of the slider receiving portion 64 in the positioning direction Dp. Thereby, the position of the slider 71 in the positioning direction Dp in the slider receiving portion 64 is determined by the contact position between the positioning pressing portion 71e and the positioning portion 64d. In the present embodiment, the positioning portion 64d has a curved surface protruding toward the negative side (the pressed portion 64c side) of the positioning direction Dp, and the positioning pressing portion 71e includes the positioning direction Dp and the photographing light. A V-shaped recess is formed on the inclined surface 71j that forms a pair in the photographing optical axis direction Do when viewed in a cross section including the axial direction Do, and the positioning portion 64d can be received between the recesses. For this reason, in this embodiment, the slider 71 cooperates with the restraint pressing portion 71d (the curved surface 71i) and the positioning portion 64d, and the slider 71 receives the slider by the guiding action of the curved positioning portion 64d and each inclined surface 71j. The position of the unit 64 in the photographing optical axis direction Do is also determined.

  Therefore, the slider 71 is pressed against the slider receiving portion 64 (the fifth lens support frame 46) by the restraining pressing force Fr from the coil spring 72 toward the image plane. Therefore, the slider 71 is positioned while being prevented from moving in a direction along the plane including the positioning direction Dp relative to the slider receiving portion 64 and the photographing optical axis direction Do, that is, in a direction orthogonal to the adjustment direction Da. Here, the slider 71 is pressed against the slider receiving portion 64 in a direction orthogonal to the adjustment direction Da. The slider receiver 64 is configured to allow displacement of the slider 71 in the adjustment direction Da. Therefore, the slider 71 can be displaced in the adjustment direction Da at the slider receiving portion 64 regardless of being pressed against the slider receiving portion 64 by the restraining pressing force Fr.

  For this reason, as shown in FIG. 13, the slider 71 tends to be displaced to the adjustment direction Da positive side in the slider receiving portion 64 by the adjustment pressing force Fa from the coil spring 72 to the adjustment direction Da positive side. Then, in the slider 71, both of the pair of pins 66 of the fifth lens holding frame 45 inserted into the guide groove 71c are evenly pressed toward the adjustment direction Da positive side. This is because the pair of pins 66 has two line segments L2 (plane) including both tangents orthogonal to the adjustment direction Da and parallel to each other (see FIG. 7), and the guide groove 71c is adjusted. This is because a pair of guide surfaces 71h orthogonal to the direction Da is defined. For this reason, the coil spring 72 moves the slider 71 (displacement member) provided on the fifth lens support frame 46 (support portion) so as to be movable in the adjustment direction Da on the positive side in the adjustment direction Da, that is, the fifth lens holding frame 45. The adjustment pressing force Fa is applied to the feeding mechanism portion 61 (adjustment cam member 69) existing on the positive side in the adjustment direction Da, and functions as an adjustment pressing member that applies the restraining pressing force Fr described above. As long as the adjustment pressing member has the function described above, a plate spring, an extension coil spring, a torsion coil spring, rubber or the like may be used instead of the compression coil spring (coil spring 72). It is not limited. The slider 71 and the coil spring 72 provided on the slider receiving portion 64 and the pair of pins 66 provided on the fifth lens holding frame 45 function as the pressing mechanism portion 62.

  The guide groove 71c is provided across the slider 71 in the positioning direction Dp in a state where the slider 71 is appropriately provided in the slider receiving portion 64, and defines a pair of guide surfaces 71h orthogonal to the adjustment direction Da. ing. The pair of pins 66 has a positional relationship in which a line segment L1 passing through the center of each pair is orthogonal to the adjustment direction Da, and two line segments L2 (planes) including both tangents are orthogonal to the adjustment direction Da to each other. Parallel. For this reason, the guide groove 71c and the pin 66 do not catch each other in the positioning direction Dp, and can be relatively displaced in the positioning direction Dp. From this, the guide groove 71c and the pin 66 are prevented from obstructing the positioning of the slider 71 in the direction orthogonal to the adjustment direction Da with respect to the slider receiving portion 64 by the restraining pressing force Fr from the coil spring 72. .

  In addition, in this lens alignment mechanism 60, as shown in FIGS. 15 and 16, as the slider 71, the first slider 711 as the first pressing mechanism portion 621 and the second slider as the second pressing mechanism portion 622 are provided. 712. In the first slider 711, a pair of first pins 661 as the first pressing mechanism portion 621 is inserted into the guide groove 71 c, and in the second slider 712, 1 as the second pressing mechanism portion 622. A pair of second pins 662 are inserted into the guide grooves 71c. Here, since the first adjustment direction Da1 and the second adjustment direction Da2 are orthogonal to each other on a plane orthogonal to the imaging optical axis OA (imaging optical axis direction Do), one pressing mechanism portion. The adjustment direction Da in 62 is parallel to the positioning direction Dp in the other pressing mechanism 62. That is, the first adjustment direction Da1 corresponding to the first pressing mechanism portion 621 is parallel to the positioning direction Dp in the second pressing mechanism portion 622, and the second adjustment direction Da2 corresponding to the second pressing mechanism portion 622 is The first pressing mechanism 621 is parallel to the positioning direction Dp.

  For this reason, when the 5th lens holding frame 45 is displaced to the 1st adjustment direction Da1 so that it may mention later by the displacement to the 1st adjustment direction Da1 of the 1st slider 711 as the 1st press mechanism part 621 (FIG. 15), the second slider 712 as the second pressing mechanism 622 has a positioning direction Dp parallel to the first adjustment direction Da1, and therefore, the guide groove 71c and the pair of second pins 662 A relative displacement in the first adjustment direction Da1 is allowed, and a relative displacement in the second adjustment direction Da2 is prevented. Therefore, the guide groove 71c of the second slider 712 and the pair of second pins 662 of the fifth lens holding frame 45 are connected to the first feeding mechanism 611 and the first in the second pressing mechanism 622 as described later. When adjusting the position of the fifth lens holding frame 45 in the first adjustment direction Da1 by the pressing mechanism 621 (see arrow A1 in FIG. 15), the moving direction of the fifth lens holding frame 45 is changed to the first adjustment direction Da1. It functions as the 2nd guide mechanism part which guides to the side.

  Further, when the second slider 712 as the second pressing mechanism 622 is displaced in the second adjustment direction Da2, the fifth lens holding frame 45 is displaced in the second adjustment direction Da2, as will be described later (FIG. 16). In the first slider 711 as the first pressing mechanism portion 621, the positioning direction Dp is parallel to the second adjustment direction Da2, so that the guide groove 71c and the pair of first pins 661 2. A relative displacement in the adjustment direction Da2 is allowed and a relative displacement in the first adjustment direction Da1 is prevented. Therefore, the guide groove 71c of the first slider 711 and the pair of first pins 661 of the fifth lens holding frame 45 are connected to the second feeding mechanism portion 612 and the second pair in the first pressing mechanism portion 621 as described later. When adjusting the position of the fifth lens holding frame 45 in the second adjustment direction Da2 by the pressing mechanism 622 (see arrow A2 in FIG. 16), the moving direction of the fifth lens holding frame 45 is changed to the second adjustment direction Da2. It functions as a first guide mechanism that guides to the side.

  This lens barrel 13 (lens alignment mechanism 60) is assembled as follows. In addition, the assembly | attachment procedure described below is an example, Comprising: It is not limited to a present Example. As shown in FIGS. 3 to 6, the fifth lens holding frame 45 is inserted into the support hole 46d of the fifth lens support frame 46 in a state where the fifth lens group 35 is held by the holding hole 45a. The shaft-side pressing member 68 is provided on the fifth lens support frame 46 while being pressed toward the subject side with respect to the fifth lens support frame 46. At this time, as described above, the fifth lens group 35 held by the fifth lens holding frame 45 is in a state in which the lens optical axis is parallel to the photographing optical axis OA.

  In the fifth lens support frame 46, in each cam receiving portion 63, the large-diameter portion 69a of the adjustment cam member 69 is inserted into the support recess 63a, and the small-diameter portion 69b of the adjustment cam member 69 is inserted into the shaft hole 63c. An adjustment cam member 69 as the feeding mechanism portion 61 is provided by the back wall surface 63b abutting the seat surface 69c on the back side of the large diameter portion 69a. Here, the protruding end 65a of one contact end portion 65 (first contact end portion 651) as the first feeding mechanism portion 611 corresponding to the first adjustment direction Da1 is changed to one adjustment direction Da (first adjustment direction Da1). ) Is brought into contact with the adjustment cam surface 69d of one adjustment cam member 69 (first adjustment cam member 691), and the other contact end 65 (second second) as the second feeding mechanism portion 612 corresponding to the second adjustment direction Da2. The protruding end 65a of the contact end portion 652) is brought into contact with the adjustment cam surface 69d of the other adjustment cam member 69 (second adjustment cam member 692) in the other adjustment direction Da (second adjustment direction Da2) (FIG. 10 and FIG. 11 and the like), the posture of the fifth lens holding frame 45 within the fifth lens support frame 46 (its support hole 46d) is set (see FIG. 6 and so on).

  The slider 71 and the coil spring 72 are provided on each of the two slider receiving portions 64 of the fifth lens support frame 46 as described above (see FIGS. 12 to 14 and the like). Then, in each slider receiving portion 64, as described above, the adjustment pressing force Fa from the coil spring 72 toward the positive side in the adjustment direction Da is applied to the slider 71 provided to be displaceable in the adjustment direction Da. The For this reason, the first slider 711 as the first pressing mechanism 621 moves the fifth lens holding frame 45 to the positive side in the first adjustment direction Da1 via the pair of first pins 661 inserted into the guide groove 71c. (See arrow A3 in FIG. 15). Then, the protruding end 65a of the first contact end portion 651 as the first feeding mechanism portion 611 in the fifth lens holding frame 45 is pressed against the adjustment cam surface 69d of the first adjustment cam member 691 in the first adjustment direction Da1. . The second slider 712 as the second pressing mechanism 622 moves the fifth lens holding frame 45 toward the positive side in the second adjustment direction Da2 via a pair of second pins 662 inserted into the guide groove 71c. (See arrow A4 in FIG. 16). Then, the protruding end 65a of the second contact end portion 652 as the second feeding mechanism portion 612 in the fifth lens holding frame 45 is pressed against the adjustment cam surface 69d of the second adjustment cam member 692 in the second adjustment direction Da2. . Here, as described above, the supporting recesses 63a and the shaft holes 63c of the feeding mechanism portions 61 are held in the fifth lens by the pressing mechanism portions 62 because the axial directions thereof are parallel to the adjustment direction Da. The pressing direction in the adjustment direction Da with respect to the frame 45 is equal to the direction of the central axis MA of the adjustment cam member 69 of each corresponding feeding mechanism portion 61.

  As a result, the fifth lens holding frame 45 that holds the fifth lens group 35 is positioned on the surface orthogonal to the photographing optical axis OA by the feeding mechanism 61 and the pressing mechanism 62 as the lens alignment mechanism 60. Is provided inside the fifth lens support frame 46 (its support hole 46d) so as to be adjustable. In the lens alignment mechanism 60, the first cam mechanism 691 serving as the first feeding mechanism section 611 and the first cam section 69d of the first adjustment cam member 691 and the first slider 711 serving as the first pressing mechanism section 621 are supported by sandwiching them. The position of the fifth lens holding frame 45 in the first adjustment direction Da1 with respect to the five-lens support frame 46 is determined (see arrow A1 in FIG. 15). Further, in the fifth lens support frame 46, the support by sandwiching the adjustment cam surface 69d of the second adjustment cam member 692 as the second feeding mechanism portion 612 and the second slider 712 as the second pressing mechanism portion 622 is supported. Thus, the position of the fifth lens holding frame 45 in the second adjustment direction Da2 with respect to the fifth lens support frame 46 is determined (see arrow A2 in FIG. 16).

  In the lens alignment mechanism 60, the adjustment cam surface 69d of the adjustment cam member 69 of each corresponding cam receiving portion 63 is placed on the protruding end 65a of each contact end portion 65 of the fifth lens holding frame 45 in the adjustment direction Da (first direction). The contact is made in the adjustment direction Da1 and the second adjustment direction Da2). Further, each cam receiving portion 63 has a seat surface 69c applied to the inner wall surface 63b of the cam receiving portion 63 (see FIG. 11), and an adjustment cam member 69 provided with an adjustment cam surface 69d on the back surface thereof is rotatable. Is provided. For these reasons, in the lens alignment mechanism 60, when viewed at the contact position of the projecting end 65a of each contact end portion 65, each cam receiving portion 63 is moved according to the rotational posture around the central axis MA of the adjustment cam member 69. The thickness dimension of the large-diameter portion 69a in the reference adjustment direction Da (center axis MA direction), that is, the position on the first adjustment direction Da1 or the second adjustment direction Da2 changes.

  For this reason, in the lens alignment mechanism 60, for example, the adjustment cam member 69 of each cam receiving portion 63 is appropriately rotated by inserting the tip of an adjustment jig such as a very small screwdriver into the operation hole 69f. The position (supporting position in the adjustment direction Da) that receives the protruding end 65a of each contact end portion 65 changes on the cam surface 69d, and the adjustment direction of the fifth lens holding frame 45 by the adjustment cam member 69 according to the change. The support position at Da can be changed, and the coil spring 72 can be appropriately expanded and contracted in accordance with the change in the position, and the support position in the adjustment direction Da of the fifth lens holding frame 45 by the slider 71 can be displaced.

  Thus, the position of the fifth lens holding frame 45 in the first adjustment direction Da1 with respect to the fifth lens support frame 46 is adjusted by appropriately rotating the first adjustment cam member 691 as the first feeding mechanism portion 611. (See arrow A1 in FIG. 15). At this time, the fifth lens holding frame 45 is a second guide mechanism portion, that is, a guide groove 71c (the guide surface 71h) of the second slider 712 of the second pressing mechanism portion 622 and a pair of fifth lens holding frames 45. The movement direction with respect to the fifth lens support frame 46 is guided by the two pins 662 in the positioning direction Dp of the second slider 712, that is, the first adjustment direction Da1.

  Further, the position of the fifth lens holding frame 45 in the second adjustment direction Da2 with respect to the fifth lens support frame 46 is adjusted by appropriately rotating the second adjustment cam member 692 as the second feeding mechanism portion 612. (See arrow A2 in FIG. 16). At this time, the fifth lens holding frame 45 is a first guide mechanism portion, that is, a guide groove 71c (the guide surface 71h) of the first slider 711 of the first pressing mechanism portion 621 and a pair of fifth lenses holding frame 45. The moving direction with respect to the fifth lens support frame 46 is guided to the positioning direction Dp in the first slider 711, that is, the second adjustment direction Da2 by the 1 pin 661.

  Accordingly, by appropriately rotating the adjustment cam member 69 of each cam receiving portion 63, the first lens holding frame 45 in the fifth lens support frame 45 is moved so as to follow the cam locus of the adjustment cam surface 69d. The position in the adjustment direction Da1 and the second adjustment direction Da2, that is, the position in the plane orthogonal to the photographing optical axis OA can be changed.

  In the lens alignment mechanism 60, the fifth lens holding frame 45 (fifth lens group 35) is moved in the fifth lens support frame 46 in a direction along a plane orthogonal to the photographing optical axis OA of the photographing optical system 12. It is possible to adjust the holding position of the fifth lens holding frame 45 as viewed in the direction along the plane orthogonal to the photographing optical axis OA while maintaining the holding state of the fifth lens holding frame 45. Therefore, while maintaining the positional relationship of the fifth lens holding frame 45 with respect to the fifth lens support frame 46, the fifth lens support frame 46 can be assembled in the rectilinear liner 48, that is, assembled as the lens barrel 13. it can.

  In the lens alignment mechanism 60, the rotation operation of the adjustment cam member 69 of each feeding mechanism portion 61 is converted into movement in the direction of the central axis MA serving as the rotation axis thereof, so that the lens alignment mechanism 60 is moved to the imaging optical axis OA of the imaging optical system 12. The position of the fifth lens group 35 (fifth lens holding frame 45) viewed in the direction along the orthogonal plane is adjusted. Accordingly, each adjustment cam member 69 has an angular range in which the adjustment cam surface 69d is provided when viewed in the rotation direction around the central axis MA, that is, a range in which the adjustment cam surface 69d exists in the rotation direction. The adjustment stroke is defined by the displacement amount of the adjustment cam surface 69d viewed in the direction of the central axis MA, that is, the amount of change in the thickness dimension of the large diameter portion 69a by the adjustment cam surface 69d, and the maximum adjustment amount in the adjustment direction Da ( (Adjustment width).

  In this lens alignment mechanism 60, for example, the fifth lens support frame 46 that supports the fifth lens holding frame 45 via the temporarily assembled lens alignment mechanism 60 is used as the first lens to constitute the lens barrel 13. After assembling together with the fourth lens group 34 from the group 31, the alignment operation of the fifth lens group 35 is performed. In this case, a subject (not shown) is arranged at a predetermined distance on the photographing optical axis OA, and is imaged by the photographing optical system 12 including the first lens group 31 to the fifth lens group 35, and the subject image is captured. The adjusting cam members 69 of the two feeding mechanism portions 61 are appropriately rotated while observing the state. A position where the subject image is in an appropriate state is an appropriate position of the fifth lens group 35 with respect to the first lens group 31 to the fourth lens group 34. Thereby, the alignment operation of the fifth lens group 35 from the first lens group 31 to the fourth lens group 34 is completed. In addition, before the fifth lens group 35 is assembled as the lens barrel 13, the alignment operation of the fifth lens holding frame 45, that is, the fifth lens group 35 in the fifth lens support frame 46 can be performed.

  With the configuration described above, in the lens barrel 13 of the present embodiment (the imaging device 10 provided with the lens barrel), in the pressing mechanism 62, the slider 71 (displacement member) is connected to the coil spring 72 (adjusting pressing member). Since the slider receiving portion 64 (the fifth lens support frame 46) is pressed against the image receiving side by the restraining pressing force Fr, the slider 71 is perpendicular to the adjustment direction Da with respect to the slider receiving portion 64. It can prevent moving to. In other words, the restraining pressing force Fr from the coil spring 72 can prevent the slider 71 from rattling in the direction orthogonal to the adjustment direction Da with respect to the slider receiving portion 64, and in the direction orthogonal to the adjustment direction Da. Can be positioned. Therefore, when the support position in the adjustment direction Da is adjusted by the feeding mechanism unit 61, the slider 71 of the pressing mechanism unit 62 that sandwiches the fifth lens holding frame 45 (lens holding unit) in the adjustment direction Da is adjusted in the adjustment direction. Since it is possible to prevent displacement in the direction orthogonal to Da, the position of the optical axis correction lens group (the fifth lens group 35 in this embodiment) can be adjusted appropriately.

  Further, in the lens barrel 13 (imaging device 10), the slider 71 is prevented from being rattled by being constantly pressed against the slider receiving portion 64 (the fifth lens support frame 46) by the coil spring 72 (adjusting pressing member). Therefore, the position of the optical axis correction lens group (fifth lens group 35) can be adjusted easily and appropriately, and the adjusted (alignment) state can be appropriately maintained.

  Further, in the lens barrel 13 (imaging device 10), the slider 71 of the pressing mechanism 62 is pressed against the slider receiving portion 64 (the fifth lens support frame 46) by the restraining pressing force Fr in the direction orthogonal to the adjustment direction Da. Since the contact is positioned, the influence on the movement of the slider 71 in the adjustment direction Da can be made extremely small. Therefore, the lens alignment mechanism 60 displaces the support position of the fifth lens holding frame 45 in the adjustment direction Da by the feeding mechanism portion 61 while preventing the slider 71 from being displaced in a direction orthogonal to the adjustment direction Da. Accordingly, the movement of the slider 71 in the adjustment direction Da in the pressing mechanism 62 can be made smooth. For this reason, the position of the optical axis correction lens group (the fifth lens group 35 in this embodiment) can be easily and appropriately adjusted.

  In the lens barrel 13 (imaging device 10), in the pressing mechanism unit 62, the slider 71 (displacement member) cooperates with the feeding mechanism unit 61 so as to sandwich and support the fifth lens holding frame 45 in the adjustment direction Da. Since the coil spring 72 that applies the adjustment pressing force Fa in the adjustment direction Da to the slider 71 applies the restraining pressing force Fr to the slider 71 together, the configuration of the pressing mechanism 62 is increased in the number of parts. And a simple and small configuration.

  In the lens barrel 13 (imaging device 10), in the pressing mechanism 62, the coil spring 72 inclines the slider 71 with respect to the adjustment direction Da with reference to the slider receiving portion 64 (the mounting projection 64e (spring seat 64b)). Since the pressing force F is applied, the adjusting pressing force Fa toward the positive side of the adjusting direction Da and the restraining pressing force Fr toward the image plane in the photographing optical axis direction Do are applied to the slider 71. A simple configuration can be obtained.

  In the lens barrel 13 (imaging device 10), in the pressing mechanism unit 62, the coil spring 72 is inclined with respect to the adjustment direction Da on a plane whose axial direction is orthogonal to the positioning direction Dp, and the slider receiving unit 64 and the slider 71. The coil spring 72 applies a pressing force F that causes the slider 71 to incline with respect to the adjustment direction Da with reference to the slider receiving portion 64 (the mounting protrusion 64e (spring seat 64b)). Therefore, a simple configuration can be obtained.

  In the lens barrel 13 (imaging device 10), the restraint pressing portion 71d provided on the slider 71 and the pressed portion 64c provided on the slider receiving portion 64 (the fifth lens support frame 46) are in the direction of the photographing optical axis. A part of the restraining pressing force Fr applied to Do is converted into a moving force toward the positioning portion 64d in the positioning direction Dp, and the slider 71 is moved in the direction of the photographing optical axis with respect to the slider receiving portion 64 (the fifth lens support frame 46). It can be pressed in two directions, Do and positioning direction Dp. Therefore, the slider 71 can be more reliably prevented from moving in the direction orthogonal to the adjustment direction Da with respect to the slider receiving portion 64 (the fifth lens support frame 46). Positioning in the orthogonal direction can be made more reliable.

  In the lens barrel 13 (imaging device 10), the single coil spring 72 (adjusting pressing member) substantially pushes the slider 71 in the adjusting direction Da and the pressing force in the photographing optical axis direction Do. A pressing force in the positioning direction Dp can be applied. For this reason, it can be set as a smaller and simple structure.

  In the lens barrel 13 (imaging device 10), a portion of the restraining pressing portion 71d of the slider 71 that faces the pressed portion 64c of the slider receiving portion 64 (the fifth lens support frame 46) in the photographing optical axis direction Do. Since the curved surface 71i is used, the slider 71 can be more smoothly displaced in the direction in which the resultant force Fc acts on the pressed portion 64c.

  In the lens barrel 13 (imaging device 10), since the photographing optical axis direction Do and the positioning direction Dp are orthogonal to each other, the adjustment direction Da of the slider 71 with respect to the slider receiving portion 64 (the fifth lens support frame 46). Therefore, it is possible to prevent the movement in the direction orthogonal to the direction more reliably, and the positioning in the direction orthogonal to the adjustment direction Da can be made more reliable. In other words, it is possible to prevent the slider 71 from rattling against the slider receiving portion 64 while suppressing the restraining pressing force Fr from the coil spring 72.

  In the lens barrel 13 (imaging device 10), the positioning pressing portion 71e on the positive side in the positioning direction Dp of the slider 71 makes a pair in the photographing optical axis direction Do when viewed in a cross section including the positioning direction Dp and the photographing optical axis direction Do. The inclined surface 71j forms a V-shaped dent, and the positioning portion 64d facing the positioning pressing portion 71e in the positioning direction Dp in the slider receiving portion 64 has a curved surface. 64d can be received between the dents of the positioning pressing portion 71e, so that the positioning portion 64d and each inclined surface 71j cooperate with the restraining pressing portion 71d (the curved surface 71i) and the positioning portion 64d. The position of the slider 71 in the photographing optical axis direction Do in the slider receiving portion 64 can also be determined by the guiding action.

  In the lens barrel 13 (imaging device 10), the first guide mechanism portion is provided in the first pressing mechanism portion 621 of the lens alignment mechanism 60 and the second guide mechanism portion is provided in the second pressing mechanism portion 622. When the support position in one adjustment direction Da is adjusted, the moving direction of the fifth lens holding frame 45 (the fifth lens group 35 (optical axis correction lens group)) with respect to the fifth lens support frame 46 is adjusted. Guide to Da. Thereby, the adjustment of the position of the optical axis correction lens group (the fifth lens group 35 in the present embodiment) can be simplified and alignment can be performed more appropriately.

  In the lens barrel 13 (imaging device 10), each slider 71 provided with a guide groove 71c as each guide mechanism portion is orthogonal to the adjustment direction Da with respect to the slider receiving portion 64 by the restraining pressing force Fr from the coil spring 72. Since it is prevented from rattling in the direction in which the fifth lens is held, the guide of the fifth lens holding frame 45 in the adjustment direction Da when adjusting the support position in the adjustment direction Da can be made more appropriate. .

  In the lens barrel 13 (imaging device 10), a guide groove provided in the slider 71 that prevents the slider receiving portion 64 (the fifth lens support frame 46) from rattling in a direction perpendicular to the adjustment direction Da. Since a pair of pins 66 provided on the fifth lens holding frame 45 are inserted into 71c to constitute a guide mechanism portion, the slider 71 and its guide groove 71c and a slider receiving portion 64 in which the slider 71 is disposed are arranged. The direction in which the guide groove 71c guides the pair of pins 66 even if the size of the fifth lens support frame 46, the pair of pins 66 (fifth lens holding frame 45) and the like are not set with high accuracy. Can be reliably set in the positioning direction Dp.

  In the lens barrel 13 (imaging device 10), the slider 71 disposed on the fifth lens support frame 46 (slider receiving portion 64 thereof) is arranged in the adjustment direction Da defined by the guide groove 71c provided across the positioning direction Dp. A pair of orthogonal guide surfaces 71h, and a pair of pins 66 in which the two line segments L2 including both tangent lines in the fifth lens holding frame 45 (line segment L1 passing through the center of each other) are orthogonal to the adjustment direction Da; Thus, since each guide mechanism portion is configured, the relative movement direction of the guide groove 71c and the pair of pins 66 can be guided in the positioning direction Dp with a simple configuration.

  In the lens barrel 13 (imaging device 10), the pair of pins 66 in which the two line segments L2 including both tangent lines in the fifth lens holding frame 45 are orthogonal to the adjustment direction Da cross the slider 71 in the positioning direction Dp. Since it is inserted into the provided guide groove 71c and the slider 71 is constantly pressed to the positive side in the adjustment direction Da by the adjustment pressing force Fa from the coil spring 72, it is between the pair of pins 66 and the guide groove 71c. Even in the case where a gap is generated, the guide surface 71h on the negative side in the adjustment direction Da of the guide groove 71c and the pair of pins 66 (outer peripheral surfaces thereof) are directed along a plane orthogonal to the adjustment direction Da. Therefore, even if the size of the pair of pins 66 and the guide groove 71c is not highly accurate, their relative moving directions can be guided in the positioning direction Dp.

  In the lens barrel 13 (imaging device 10), even when a gap is generated between the pair of pins 66 and the guide groove 71c, the guide surface 71h on the negative side in the adjustment direction Da of the guide groove 71c and the pair of pins. 66 (the outer peripheral surface thereof) can be addressed along a plane orthogonal to the adjustment direction Da, so that it is not necessary to set the pair of pins 66 to fit in the guide groove 71c without any gaps. Even if the size of the pin 66 and the guide groove 71c is not highly accurate, the pair of pins 66 are press-fitted into the guide groove 71c due to the variation in size, and a large frictional force is generated between them. This can be prevented, and the relative movement direction thereof can be smoothly guided in the positioning direction Dp.

  In the lens barrel 13 (imaging device 10), the guide surface 71h perpendicular to the adjustment direction Da of the guide groove 71c of the slider 71, which is constantly pressed to the positive side of the adjustment direction Da by the adjustment pressing force Fa from the coil spring 72, When the two line segments L2 including both tangent lines of the fifth lens holding frame 45 are directed to the pair of pins 66 perpendicular to the adjustment direction Da, the fifth lens is formed by the pressing mechanism 62 and the feeding mechanism 61. Since the holding frame 45 is supported, the fifth lens holding frame 45 can be appropriately sandwiched in the adjustment direction Da. Therefore, the adjustable direction of the fifth lens holding frame 45, that is, the fifth lens group 35 with respect to the fifth lens support frame 46 can be reliably set as the adjustment direction Da. From this viewpoint, it is desirable that the distance between the pair of pins 66 be as large as possible.

  In the lens barrel 13 (imaging device 10), the pair of guide surfaces 71h (guide grooves 71c) are orthogonal to the adjustment direction Da, and two line segments L2 including both tangents of the pair of pins 66 are adjusted in the adjustment direction Da. Therefore, regardless of the relative displacement of the pair of guide surfaces 71 h and the pair of pins 66 in the direction orthogonal to the adjustment direction Da, the pair of guide surfaces 71 h and the pair of pins 66. Can be assigned in the adjustment direction Da. For this reason, in the pressing mechanism portion 62 corresponding to one adjustment direction Da, even if the slider 71 is positioned in a direction orthogonal to one adjustment direction Da by the restraining pressing force Fr from the coil spring 72, the other feeding mechanism portion Even if the position of the fifth lens holding frame 45 in the other adjustment direction Da is adjusted by 61 and the pressing mechanism 62, the adjustment pressing force Fa applied via the slider 71 is applied in the one adjustment direction Da to the fifth lens. It can be made to act on the holding frame 45 and can be aligned more appropriately.

  In the lens barrel 13 (imaging device 10), a guide groove 71c (the pair of guide surfaces 71h) of the slider 71 is formed by a pair of pins 66 in which two line segments L2 including both tangents are orthogonal to the adjustment direction Da. Therefore, the contact area between the pair of pins 66 (the outer peripheral surface thereof) and the guide surface 71h can be made extremely small. The frictional resistance that can occur during the period can be reduced. For this reason, the pair of guide surfaces 71h and the pair of pins 66 appropriately support the fifth lens holding frame 45 in the adjustment direction Da in cooperation with the feeding mechanism 61 in accordance with the adjustment pressing force Fa from the coil spring 72. In addition, the relative movement in the positioning direction Dp can be made smooth.

  In the lens barrel 13 (imaging device 10), the slider 71 of the pressing mechanism 62 adjusts the pair of guide surfaces 71h defined by the guide groove 71c to the pair of pins 66 provided on the fifth lens holding frame 45. Since the fifth lens holding frame 45 is supported by contacting with Da, it can function as a support position in the pressing mechanism 62 with a simple configuration and can also function as a guide mechanism.

  In the lens barrel 13 (imaging device 10), the lens optical axis of the fifth lens group 35 is maintained while the fifth lens holding frame 45 (fifth lens group 35) is supported by the fifth lens support frame 46. Since it is possible to adjust the position of the fifth lens group 35 in the direction along the plane perpendicular to the surface, there is no need to fix it with an adhesive or the like to maintain the alignment state after the alignment operation is completed. Thus, the fifth lens group 35 aligned with high accuracy can be obtained. In other words, in the lens barrel 13 (imaging device 10), the holding state of the fifth lens holding frame 45 (fifth lens group 35) can be adjusted in the fifth lens support frame 46. Thus, the fifth lens group 35 that is aligned with each other can be obtained.

  Therefore, in the lens barrel 13 according to the present invention, the optical axis correction lens group (the fifth lens group 35 in the above-described embodiments) can be aligned with high accuracy.

  In the above-described embodiment, the lens barrel 13 according to the present invention has been described. However, the lens barrel is provided with an optical axis correction lens group including at least one lens, and the optical axis correction lens is provided. A lens holding unit for holding the group, a support unit for supporting the lens holding unit inside so as to be movable in a direction orthogonal to the imaging optical axis, and a direction orthogonal to the imaging optical axis of the lens holding unit with respect to the support unit A lens alignment mechanism that adjusts the position of the lens, and the lens alignment mechanism that supports the lens holding unit with the lens holding portion interposed therebetween in an adjustment direction that passes through the imaging optical axis on a plane that is orthogonal to the imaging optical axis. The feeding mechanism portion is provided on the support portion, and a support position for supporting the lens holding portion is freely displaceable in the adjustment direction, and the pressing mechanism portion includes the lens Said adjustment to support the holding part. A displacement member provided at the support portion so as to be displaceable in a direction, and an adjustment pressing member that applies an adjustment pressing force toward the feeding mechanism portion in the adjustment direction to the displacement member, the adjustment pressing member Can be any lens barrel that provides the displacement member with a restraining pressing force that presses the displacement member against the support portion in a direction orthogonal to the adjustment direction along with the adjustment pressing force. It is not limited.

  In the above-described embodiment, the fifth lens group 35 is configured to be aligned. However, other lens groups (for example, the first lens group 31 to the fourth lens group 34 in the above-described embodiment) are used. However, the present invention is not limited to the above-described embodiment.

  Further, in the above-described embodiments, the photographing optical system is configured by using the first lens group 31 to the fourth lens group 34 in addition to the fifth lens group 35 as the optical axis correction lens group. As long as the lens holding frame includes an optical axis correction lens group configured to be supported by the support frame so that the lens can be aligned via the lens alignment mechanism, the lens holding frame may have another lens group. The present invention is not limited to the above-described embodiments.

  In the embodiment described above, in the lens alignment mechanism 60, the first adjustment direction Da1 and the second adjustment direction Da2 orthogonal to each other on the surface orthogonal to the photographing optical axis OA are set as the adjustment direction Da. The first adjustment direction Da1 and the second adjustment direction Da2 only need to cross each other, and are not limited to the above-described embodiments. In the case of such a configuration, the positioning direction Dp in the first pressing mechanism portion 621 (the guide direction by the guide mechanism portion (the direction in which the guide groove 71c crosses the slider 71 and the pair of pins 66 in parallel)) is second adjusted. In addition to being parallel to the direction Da2, the positioning direction Dp in the second pressing mechanism 622 needs to be parallel to the first adjustment direction Da1.

  In the above-described embodiment, in the pressing mechanism 62, the pressed portion 64c of the slider receiving portion 64 (the fifth lens support frame 46) is an inclined surface, and the imaging surface side of the restraining pressing portion 71d of the slider 71 However, as described above, a part of the restraining pressing force Fr is applied to the slider 71 as a component force (Fp) toward the positioning pressing portion 71e of the slider receiving portion 64 in the positioning direction Dp. For example, the constraining pressing portion 71d may be an inclined surface and the pressed portion 64c may be a curved surface, and is not limited to the above-described embodiment.

  In the above-described embodiment, the positioning pressing portion 71e on the positive side in the positioning direction Dp of the slider 71 forms a V-shaped recess, and the positioning portion 64d of the slider receiving portion 64 has a curved surface shape. The positioning portion 64d can be received between the recesses of the positioning pressing portion 71e. However, when the positioning pressing portion 71e and the positioning portion 64d are contacted in the positioning direction Dp, the slider receiving portion 64 (fifth As long as the displacement of the slider 71 in the positioning direction Dp with respect to the lens support frame 46) is stopped, for example, the positioning pressing portion 71e and the positioning portion 64d may be configured as flat surfaces, one of which is a curved surface. Or one of them may be pointed, and is not limited to the above-described embodiment.

  In the above-described embodiment, the positioning pressing portion 71e on the positive side in the positioning direction Dp of the slider 71 is V on the inclined surface 71j that makes a pair in the photographing optical axis direction Do when viewed in a section including the positioning direction Dp and the photographing optical axis direction Do. In addition to forming a letter-shaped dent, the positioning portion 64d facing the positioning pressing portion 71e in the positioning direction Dp in the slider receiving portion 64 is assumed to be curved, but the positioning pressing portion 71e. Is a curved surface (hemispherical or R-shaped), and the positioning portion 64d is seen in a cross section including the positioning direction Dp and the imaging optical axis direction Do, and the V-shaped dent is an inclined surface that makes a pair in the imaging optical axis direction Do. However, the present invention is not limited to the above-described embodiments.

  In the above-described embodiment, the lens barrel 13 is configured as a lens barrel unit that can be attached to and detached from the camera body 11 together with the imaging element 22 and the optical element 37 (see FIG. 3), but is fixed to the camera body 11. The image sensor 22 and the optical element 37 (see FIG. 3) may be configured to be detachable from the camera body (11), and is limited to the above-described embodiment. It is not something.

  In the above-described embodiments, the imaging device 10 is described as an example of an electronic device. However, the lens holding unit that holds the optical axis correction lens is supported via the lens alignment mechanism, so that the support unit is supported. If it can be adjusted in a direction perpendicular to the direction of the optical axis of photographing, an electronic device as a portable information terminal device such as a so-called PDA (Personal Data Assistant) or a mobile phone or an electronic device as an image input device. Even if it exists, the lens barrel (lens aligning mechanism) which concerns on this invention can be applied, and it is not limited to an above-described Example. This is because the electronic device described above has recently incorporated a camera function, and such an electronic device has substantially the same appearance as the imaging device 10 (lens barrel 13), although the appearance is slightly different. It is because there are many things that include the functions and configurations.

  Although the lens barrel of the present invention has been described based on the embodiments, the specific configuration is not limited to the embodiments, and design changes and additions are allowed without departing from the gist of the present invention. Is done. Further, the number, position, shape, and the like of the constituent members are not limited to the embodiments, and can be set to a number, position, shape, and the like that are suitable for carrying out the present invention.

10 imaging device (as an example of imaging device) 13 lens barrel 35 fifth lens group (as an example of optical axis correction lens group) 45 fifth lens holding frame 46 (as an example of lens holding portion) (supporting portion) Fifth lens support frame 60 Lens alignment mechanism 61 Feeding mechanism portion 62 Pressing mechanism portion 64c Pushed portion 64d Positioning portion 68 Optical axis side pressing member 71 Slider 71c (as an example of a displacement member) Guide groove 71d as an example of the first guide mechanism part and the second guide mechanism part 71d Restraining pressing part 71e Positioning pressing part 71h Guide surface 71i (as an example of the first guide mechanism part and the second guide mechanism part) Curved surface 71j Inclined surface 72 (as an example of an adjustment pressing member) Coil spring 611 First feeding mechanism portion 612 Second feeding mechanism portion 621 First pressing mechanism portion 62 Second pressing mechanism 661 First pin 662 (as an example of a first guide mechanism) Second pin 711 (As an example of a second guide mechanism) First slider 712 (As an example of a displacement member) Second slider (as an example of member) Da Adjustment direction Da1 First adjustment direction Da2 Second adjustment direction Do Imaging optical axis direction Dp Positioning direction Fa Adjustment pressing force Fr Restraint pressing force OA Imaging optical axis

JP 2008-111932 A

Claims (9)

A lens barrel provided with an optical axis correction lens group including at least one lens,
A lens holding unit that holds the optical axis correction lens group, a support unit that supports the lens holding unit inside so as to be movable in a direction orthogonal to the imaging optical axis, and imaging light of the lens holding unit with respect to the support unit A lens alignment mechanism that adjusts the position in a direction perpendicular to the axis,
The lens centering mechanism includes a feeding mechanism and the pressing mechanism which supports across the lens holder in that adjustment direction to perpendicular to the photographing optical axis,
The feeding mechanism portion is provided in the support portion, and a support position for supporting the lens holding portion can be displaced in the adjustment direction.
The pressing mechanism portion includes a displacement member provided on the support portion so as to be displaceable in the adjustment direction to support the lens holding portion, and an adjustment pressing force applied to the displacement member toward the feeding mechanism portion in the adjustment direction. An adjustment pressing member that provides
The adjustment pressing member applies, together with the adjustment pressing force, a restraining pressing force that presses the displacement member against the support portion in a direction orthogonal to the adjustment direction .
The adjustment pressing member presses the displacement member in a direction inclined with respect to the adjustment direction on a plane including the adjustment direction and the photographing optical axis direction, thereby causing the adjustment pressing force and the restraint to be applied to the displacement member. A lens barrel characterized by applying a pressing force . The support portion sandwiches the displacement member between a pressed portion provided at a position facing the displacement member in the photographing optical axis direction, and a positioning direction orthogonal to the adjustment direction and inclined with respect to the photographing optical axis direction. And a positioning portion provided at a position facing the pressed portion,
The displacement member includes: a restraining pressing portion provided at a position facing the pressed portion in the photographing optical axis direction; and a positioning pressing portion provided at a position facing the positioning portion in the positioning direction. Have
One of the pressed portion and the restraining pressing portion is an inclined surface that converts a part of the restraining pressing force to the displacement member into a moving force in the positioning direction of the displacement member with respect to the support portion. And
The other of the restraining pressing portion and the pressed portion, the lens barrel according to claim 1 the cross-sectional shape perpendicular to the adjustment direction is characterized that you have been curved. The positioning direction, the lens barrel according to claim 2, characterized that you perpendicular to the adjustment direction and the photographing optical axis direction. Either one of the positioning part and the positioning pressing part has a curved cross-sectional shape orthogonal to the adjustment direction,
The other of the positioning portion and the positioning pressing portion includes the adjustment direction and is inclined with respect to the positioning direction, and is subject to the positioning direction when viewed in a cross section including the imaging optical axis direction and the positioning direction. the lens barrel according to claim 2 or claim 3, characterized in that have a sloping surface of the pair. As the adjustment direction, a first adjustment direction and a second adjustment direction intersecting each other on a plane orthogonal to the photographing optical axis are set,
In the lens alignment mechanism, a first feeding mechanism portion corresponding to the first adjustment direction and a second feeding mechanism portion corresponding to the second adjustment direction are provided as the feeding mechanism portion, and the pressing As the mechanism part, a first pressing mechanism part corresponding to the first adjustment direction and a second pressing mechanism part corresponding to the second adjustment direction are provided,
The first pressing mechanism unit includes the second feeding mechanism unit and the second pressing mechanism unit, wherein the lens holding unit with respect to the support unit is adjusted in the second adjustment direction in the second adjustment direction. A first guide mechanism for guiding the moving direction of the lens holding portion in the second adjustment direction;
The second pressing mechanism unit includes the first feeding mechanism unit and the first pressing mechanism unit, wherein the lens holding unit with respect to the support unit is adjusted in the first adjustment direction when the lens holding unit is adjusted in the first adjustment direction. the lens barrel as claimed in any one of claims 4 second guide mechanism is characterized that you have provided for guiding the movement direction of the lens holding portion into the first adjustment direction. Wherein the first adjusting direction and the second adjustment direction, the lens barrel according to claim 5, characterized that you orthogonal to each other. Between the support part and the lens holding part, there is an optical axis side pressing member that applies an optical axis side pressing force that presses the lens holding part against the support part in the photographing optical axis direction. the lens barrel as claimed in any one of claims 6 provided, wherein Rukoto. A lens barrel unit comprising the lens barrel according to any one of claims 1 to 7 . An image pickup apparatus comprising the lens barrel unit according to claim 8 .