JP2008170792A - Collapsible lens barrel and imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve miniaturization. <P>SOLUTION: The collapsible lens barrel is provided with a straight advance guide 61 regulating the rotation of a first moving frame 113 and a second moving frame 68 in a direction around an optical axis when a cam barrel 18 for moving the first moving frame and the second moving frame in an optical axis direction is rotated, and guiding the first moving frame and the second moving frame in the optical axis direction. The straight advance guide is provided with an annular part 62 extending in the direction around the optical axis and guide projecting parts 63, 63 and 63 projecting in the optical axis direction from the annular part and arranged to be spaced in the direction around the optical axis. A blur correction mechanism 87 is provided with a pair of coils for drive 85 and 85. The first moving frame and the annular part of the straight advance guide are positioned on an opposite side in the optical axis direction while putting a second lens group in between, and one of the guide projecting parts of the straight advance guide is positioned corresponding to space between the pair of coils for drive. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to the technical field of a retractable lens barrel and an imaging device. More specifically, the present invention relates to a technical field in which one of the guide protrusions of a linear guide is positioned correspondingly between a pair of driving coils to achieve downsizing.

  The retractable lens barrel is supported by the apparatus main body of various apparatuses such as a video camera and a still camera used as an imaging apparatus, and is generally housed in the apparatus main body when not photographing and protrudes from the apparatus main body when photographing ( For example, see Patent Document 1).

  By providing such a retractable lens barrel, it is possible to achieve both a reduction in size (thinning) at the time of non-shooting and securing of good optical performance at the time of shooting.

  Some image pickup apparatuses are provided with a blur correction mechanism for correcting image blur at the time of photographing. Such a blur correction mechanism is incorporated in a retractable lens barrel together with a retractable mechanism.

JP 2004-258689 A

  By the way, in recent years, there is a high demand for downsizing the imaging apparatus in order to ensure good portability.

  However, in an imaging apparatus equipped with a retractable lens barrel, when a shake correction mechanism is incorporated in addition to the retractable mechanism inside the retractable lens barrel, both mechanisms may interfere and hinder downsizing. is there.

  Accordingly, it is an object of the present invention to overcome the above-described problems and to reduce the size of the retractable lens barrel and the imaging device.

  In order to solve the above-described problem, the retractable lens barrel of the present invention includes a first moving frame that holds the first lens group and is moved in the optical axis direction and has a guided portion, and a second lens group. A second moving frame that is held and moved in the optical axis direction and has a guided portion, and a second lens group that is supported by the second moving frame is moved in a plane orthogonal to the optical axis direction to perform blur correction. Fixed and has a blur correction mechanism, a guide portion in which the guided portion of the first moving frame is slidably engaged, and a guide portion in which the guided portion of the second moving frame is slidably engaged A cam cylinder that rotates in the direction around the optical axis relative to the ring to move the first moving frame and the second moving frame in the optical axis direction, and the first moving frame and the second moving frame when the cam cylinder rotates. And a rectilinear guide that regulates the rotation of the first moving frame and the second moving frame in the direction of the optical axis by restricting the rotation of the optical axis about the optical axis. And a plurality of guide projections protruding from the annular portion in the optical axis direction and spaced apart in the optical axis direction, and a pair of drive magnets and A pair of driving coils arranged apart from each other in a plane perpendicular to the optical axis, and the first moving frame and the annular portion of the rectilinear guide between the second lens group and the opposite side in the optical axis direction And one of the guide protrusions of the linear guide is positioned correspondingly between the pair of driving coils.

  In order to solve the above-described problems, the imaging apparatus according to the present invention has a main body that supports the retractable lens barrel, and a first movement that holds the first lens group and moves in the optical axis direction and has a guided portion. A frame, a second moving frame that holds the second lens group and is moved in the optical axis direction and has a guided portion, and a surface that is supported by the second moving frame and that is perpendicular to the optical axis direction. A motion compensation mechanism that performs motion compensation by moving within the guide, a guide portion that is slidably engaged with the guided portion of the first moving frame, and a guided portion of the second moving frame that is slidable. A cam barrel having a guide portion to be joined and rotated in the direction around the optical axis relative to the fixed ring to move the first moving frame and the second moving frame in the optical axis direction; The rotation of the moving frame and the second moving frame in the direction around the optical axis is restricted, and the first moving frame and the second moving frame are guided in the optical axis direction. A straight guide is provided, and the straight guide is provided with an annular portion extending in the direction around the optical axis, and a plurality of guide projections protruding from the annular portion in the optical axis direction and spaced apart in the direction around the optical axis, thereby correcting blurring. The mechanism is provided with a pair of driving magnets and a pair of driving coils spaced apart in a plane perpendicular to the optical axis, and the second lens group is connected to the first moving frame and the annular portion of the linear guide. It is positioned on the opposite side in the optical axis direction, and one of the guide protrusions of the linear guide is positioned correspondingly between the pair of driving coils.

  Therefore, in the retractable lens barrel and the imaging apparatus according to the present invention, the guide protrusion of the rectilinear guide can be inserted between the pair of coils when the second moving frame is moved.

  In the retractable lens barrel according to the present invention, a first movable unit having at least a first lens group and a second movable unit having at least a second lens group with respect to a fixed ring are arranged in the optical axis direction of each lens group. A retractable lens barrel that is moved to a first moving frame that holds the first lens group and is moved in the optical axis direction and has a guided portion; and a second lens group that holds the first lens group and that is in the optical axis direction. A second moving frame having a guided portion and a blur correction mechanism that performs a blur correction by moving the second lens group supported by the second moving frame in a plane perpendicular to the optical axis direction; The guide portion of the first moving frame is slidably engaged, and the guide portion of the second moving frame is slidably engaged. A cam cylinder that rotates in the direction around the axis and moves the first moving frame and the second moving frame in the optical axis direction; A linear guide that restricts rotation of the first moving frame and the second moving frame in the direction around the optical axis when the cam barrel rotates and guides the first moving frame and the second moving frame in the optical axis direction; The linear guide is provided with an annular portion extending in the direction around the optical axis and a plurality of guide projections protruding from the annular portion in the optical axis direction and spaced apart in the direction around the optical axis, and a pair of drives for the blur correction mechanism And a pair of driving coils arranged apart from each other in a plane orthogonal to the optical axis, and the first moving frame and the annular portion of the rectilinear guide are sandwiched by the second lens group in the optical axis direction. One of the guide protrusions of the linear guide is positioned correspondingly between the pair of drive coils.

  Therefore, when the first movable unit and the second movable unit are operated, the driving coil and the guide projection do not interfere with each other, and the lens barrel can be reduced in size.

  According to the second aspect of the present invention, the cam cylinder and the rectilinear guide can be moved in the optical axis direction with respect to the fixed ring, and the rectilinear guide is integrated with the cam cylinder when the cam cylinder moves in the optical axis direction. Since the linear guide is moved in the optical axis direction, the length of the lens barrel in the optical axis direction is longer than that in the case where a fixed guide shaft is used as the guide means of the movable unit. The length can be shortened.

  In the invention described in claim 3, since at least three guide protrusions of the linear guide are provided, the holding force of the linear guide with respect to the movable unit is large, and the movement of the movable unit in the optical axis direction is stabilized. be able to.

  In the invention described in claim 4, since the annular portion of the rectilinear guide and the plurality of guide protrusions are integrally formed, it is possible to reduce the number of parts and the manufacturing cost.

  In the imaging apparatus of the present invention, the first movable unit having at least the first lens group and the second movable unit having at least the second lens group are moved in the optical axis direction of each lens group with respect to the fixed ring. An image pickup apparatus including a retractable lens barrel, a device main body that supports the retractable lens barrel, and a first movement that holds the first lens group and is moved in the optical axis direction and has a guided portion. A frame, a second moving frame that holds the second lens group and is moved in the optical axis direction and has a guided portion, and a surface that is supported by the second moving frame and that is perpendicular to the optical axis direction. A motion compensation mechanism that performs motion compensation by moving within the guide, a guide portion that is slidably engaged with the guided portion of the first moving frame, and a guided portion of the second moving frame that is slidable. The first movement having a guide portion to be joined and rotated around the optical axis with respect to the stationary ring And a cam cylinder that moves the second moving frame in the optical axis direction, and the first moving frame that restricts rotation of the first moving frame and the second moving frame in the direction around the optical axis when the cam cylinder rotates. And a rectilinear guide for guiding the second moving frame in the optical axis direction. The linear guide is provided with an annular portion extending in the direction around the optical axis and protruding from the annular portion in the optical axis direction and spaced apart in the direction around the optical axis. A plurality of guide protrusions, a pair of drive magnets and a pair of drive coils spaced apart in a plane perpendicular to the optical axis in the shake correction mechanism, and straight movement with the first moving frame The annular portion of the guide is positioned on the opposite side in the optical axis direction with the second lens group in between, and one of the guide protrusions of the linear guide is positioned correspondingly between the pair of driving coils. It is characterized by.

  Therefore, when the first movable unit and the second movable unit are operated, the drive coil and the guide protrusion do not interfere with each other, and the image pickup apparatus can be reduced in size.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  In the best mode described below, the present invention is applied to a still camera. Note that the scope of application of the present invention is not limited to a still camera, and can be widely applied to, for example, various imaging devices incorporated in video cameras and other devices.

  In the following description, it is assumed that the front, rear, up, down, left, and right directions are shown as viewed from the photographer at the time of photographing with the still camera. Therefore, the subject side is the front and the photographer side is the rear.

  In addition, the front and rear, up and down, left and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

  As shown in FIGS. 1 and 2, the imaging apparatus 1 includes an apparatus main body 2 and a lens barrel 3 that is supported by the apparatus main body 2 so as to be movable in the front-rear direction (optical axis direction). The lens barrel 3 is housed in the apparatus main body 2 (see FIG. 1), and the lens barrel 3 protrudes forward from the apparatus main body 2 during shooting (see FIG. 2). An imaging apparatus provided.

  By providing such a retractable lens barrel 3, it is possible to achieve both a reduction in size (thinning) during non-photographing and securing of good optical performance during photographing.

  The apparatus main body 2 is configured, for example, by arranging required parts inside and outside a horizontally long flat housing 4 (see FIGS. 1 to 3).

  A flash 5 and a viewfinder window 6 are provided on the front surface of the apparatus main body 2. A shutter button 7, a mode switching dial 8 and a power button 9 are provided on the upper surface of the apparatus body 2. A battery cover 10 is provided on the side surface (right side surface) of the apparatus main body 2. By opening and closing the battery cover 10, a battery (not shown) can be inserted into and removed from the apparatus main body 2. A viewfinder 11, a zoom switch 12, a display screen 13, operation buttons 14, 14,... And a terminal cover 15 are provided on the rear surface of the apparatus body 2. Inside the terminal cover 15 are provided power terminals and input / output terminals (not shown).

  4 to 6, the lens barrel 3 includes a fixing member 16, a fixing ring 17 fixed to the fixing member 16, a cam cylinder 18 rotatably supported on the fixing ring 17, and the cam cylinder. 18 includes a first movable unit 19 supported so as to be movable in the front-rear direction (optical axis direction).

  As shown in FIGS. 7 and 8, the fixing member 16 includes a substrate portion 20 formed in a substantially plate shape facing in the front-rear direction, and a mounting protrusion 21 protruding forward from the lower end portion of the substrate portion 20. have.

  An arrangement hole 20 a penetrating in the front-rear direction is formed in a substantially central portion of the substrate portion 20. A bearing recess 20b that opens forward is formed at the right end of the substrate 20 near the lower end. A guide shaft portion 20 c that protrudes forward is provided at a position near the lower end of the substantially central portion in the left-right direction of the substrate portion 20.

  A guide shaft 22 is attached to the bearing recess 20 b of the substrate unit 20.

  A spring hooking piece 21 a is provided at the front end of the mounting projection 21.

  A focus motor unit 23 is attached to the attachment projection 21. The focus motor unit 23 includes a motor 24, a motor mounting plate 25, a lead screw 26 serving as a motor shaft of the motor 24, and a nut member 27 screwed into the lead screw 26.

  The focus motor unit 23 has a motor mounting plate 25 attached to the mounting projection 21.

  The focus moving unit 28 is moved in the front-rear direction, that is, in the optical axis direction by the focus motor unit 23. The focus moving unit 28 is formed by attaching a focus lens group 30 to a holding arm 29.

  The holding arm 29 has a lens mounting portion 31 formed in an annular shape, an arm portion 32 that protrudes obliquely downward to the right from the lens mounting portion 31, and a supported cylinder that protrudes forward from the arm portion 32. Part 33.

  A focus lens group 30 is attached to the lens attachment portion 31.

  At a position near the lower end of the arm portion 32, a spring hooking protrusion 32a is provided. The arm portion 32 is provided with a supported piece 32b formed in a U-shape.

  The focus moving unit 28 is supported by the fixed member 16 so that the supported cylinder portion 33 is slidably supported by the guide shaft 22 and the supported piece 32b is slidably supported by the guide shaft portion 20c. In a state where the focus moving unit 28 is supported by the fixed member 16, a part of the arm portion 32 is fixed to the nut member 27 of the focus motor unit 23, and the spring hooking piece 21 a of the fixing member 16 and the spring hooking of the focus moving unit 28. A tension coil spring 34 is supported between the projecting piece 32a. Accordingly, the focus moving unit 28 is biased forward by the tension coil spring 34.

  When the motor 24 of the focus motor unit 23 is activated and the lead screw 26 is rotated, the nut member 27 is moved in a direction corresponding to the rotation direction of the lead screw 26, and the focus moving unit 28 is moved to the guide shaft 22 and the guide shaft portion. Guided by 20c and moved in the optical axis direction.

  An imaging unit 35 is attached to the fixed member 16 from the rear (see FIG. 4). The imaging unit 35 includes a holding frame member 36 and an imaging element 37 held by the holding frame member 36, for example, a CCD (Charge Coupled Device). In the imaging unit 35, the holding frame member 36 is attached to the fixing member 16, and the imaging element 37 is arranged in the arrangement hole 20a of the fixing member 16 (see FIG. 6).

  A photo interrupter 38 is attached to the fixed member 16 at a predetermined position (see FIG. 4). The position of the focus moving unit 28 in the optical axis direction is detected by the photo interrupter 38.

  A fixing ring 17 is attached to the fixing member 16 from the front side (see FIGS. 4 and 5). The fixed ring 17 is protruded from a cylindrical base portion 39 formed in a substantially cylindrical shape, a unit pressing portion 40 protruding from the lower end portion on the right end side of the cylindrical base portion 39, and a lower end portion on the left end side of the cylindrical base portion 39. A case attachment portion 41.

  A gear arrangement hole (not shown) is formed in the cylindrical base portion 39 at a position corresponding to the case attachment portion 41. On the inner surface of the cylindrical base 39, as shown in FIG. 9, linear guide grooves 39a, 39a, 39a and a guide groove 39b for rotation are formed continuously. The rectilinearly inclined guide grooves 39a, 39a, 39a are formed to be separated from each other in the circumferential direction and are inclined with respect to the front-rear direction. The rotation guide groove 39b is formed continuously with the front ends of the straight advance inclination guide grooves 39a, 39a, 39a and extends in the circumferential direction.

  On the inner surface of the cylindrical base portion 39, rectilinear guide grooves 39c, 39c, 39c are formed that extend in the front-rear direction and are opened rearward.

  The case mounting portion 41 has a front surface portion 41a that is positioned at the front end and faces in the front-rear direction, and a side surface portion 41b that continues to the front surface portion 41a and faces in the left-right direction, and is formed in a shape opened downward and rearward.

  In a state where the fixed ring 17 is attached to the fixed member 16, the guide shaft 22 is pressed from the front by the unit pressing portion 40 and the focus motor unit 23 is covered from the front.

  In a state where the fixed ring 17 is attached to the fixed member 16, the transmission gear 42 that is long in the axial direction is rotatably supported between the front surface portion 41a of the case attaching portion 41 and the fixed member 16 (see FIG. 10). The transmission gear 42 is arranged in the gear arrangement hole of the cylindrical base 39.

  A case body 43 is attached to the case attachment portion 41 of the fixed ring 17 (see FIGS. 4 and 5). As shown in FIGS. 10 to 12, the case body 43 is formed by connecting a front half 44 and a rear half 45 in the front-rear direction.

  The front half 44 is formed with a mounting step 44a facing upward at a position near the upper end on the front surface thereof. The front half 44 is provided with an element attachment portion 44b that is opened forward and formed in a concave shape. The front half 44 is formed with an element arrangement hole 44c penetrating back and forth in the element mounting portion 44b.

  The rear half 45 is provided with a mounting protrusion 45a protruding rearward from the rear surface. The rear half 45 is provided with an element mounting portion 45b that is opened rearward and formed in a concave shape. The rear half 45 is formed with an element arrangement hole 45c penetrating back and forth in the element mounting portion 45b.

  A motor 46 is attached to the case body 43, and a light shielding blade 47 and a worm 48 are fixed to the motor shaft of the motor 46 (see FIG. 4). In a state where the motor 46 is attached to the case body 43, the motor shaft, the light shielding blade 47 and the worm 48 are arranged inside the case body 43.

  A transmission gear group (not shown) is disposed inside the case body 43, and the transmission gear group meshes with the worm 48 and the transmission gear 42.

  When the motor 46 is started, the light shielding blade 47 and the worm 48 are rotated with the rotation of the motor shaft, and the driving force is transmitted from the worm 48 to the transmission gear 42 through the transmission gear group.

  A pair of detection elements 49, 49, for example, a photo interrupter is attached to the case body 43. The detection element 49 is formed by mounting a detection body 49b on a substrate 49a. As shown in FIGS. 11 and 12, the detection elements 49, 49 are respectively pressed by the substrates 49a, 49a from the outer surface side to the element mounting portions 44b, 45b side of the case body 43 to the element arrangement holes 44c, 45c. , 49b are attached by the attachment leaf spring 50.

  The plate spring 50 for mounting is formed by bending a plate-like material that is long in one direction into a predetermined shape, and is located above the base surface portion 51 that is positioned at the lowest position and faces the vertical direction, and from both front and rear edges of the base surface portion 51. Element pressing portions 52 and 53 protruding to the front, an engaging portion 54 protruding rearward from the upper edge of the element pressing portion 52 on the front side, and a pressed portion protruding upward from the rear edge of the engaging portion 54 55, a connecting portion 56 protruding rearward from the upper edge of the rear element pressing portion 53, a pressed portion 57 protruding upward from the rear edge of the connecting portion 56, and the pressed portion 57 And an engaging portion 58 projecting forward from the upper edge.

  The element pressing portions 52 and 53 are provided with protruding pressing protrusions 52a and 53a that protrude in the directions approaching each other.

  The attachment leaf spring 50 is spread and elastically deformed so that the element pressing portions 52 and 53 move away from each other, and is attached to the case body 43 by elastic recovery. In a state where the attachment leaf spring 50 is attached to the case body 43, each part other than the pressed parts 55 and 57 is in surface contact with the outer surface of the case body 43. At this time, the substrates 49a and 49a of the detection elements 49 and 49 arranged in the element mounting portions 44b and 45b of the case body 43 are pressed and fixed from the outside by the pressing protrusions 52a and 53a of the mounting plate spring 50, respectively. The detection elements 49, 49 are prevented from falling off from the case body 43.

  The mounting leaf spring 50 has the mounting protrusion 45a of the case body 43 sandwiched between the connecting portion 56 and the engaging portion 58, and the pressed portions 55 and 57 are pressed in the direction approaching each other by the fixing ring 17 and the fixing member 16, respectively. . At this time, gaps 59 and 60 are formed between the pressed portion 55 and the front surface of the front half 44 and between the pressed portion 57 and the mounting protrusion 45a of the rear half 45, respectively.

  When the motor 46 is rotated, the light shielding blade 47 is rotated. As the light shielding blade 47 rotates, the detection elements 49 and 49 detect the switching state between light shielding and light transmission, and the rotation direction and the number of rotations of the motor 46 are determined. Detected.

  As described above, in the imaging apparatus 1, the element pressing portions 52 and 53 that respectively hold the detection elements 49 and 49, and the pressed portions that are pressed by the fixing ring 17 and the fixing member 16 in the direction approaching each other from the outer surface side. The detection elements 49 and 49 are connected to the case by the mounting leaf springs 50 having 55 and 57 and engaging portions 54 and 58 that engage the case body 43 from a direction orthogonal to the direction in which the pressed portions 55 and 57 are pressed. The body 43 is fixed.

  Therefore, it is not necessary to fix the detection elements 49, 49 to the case body 43 using an adhesive, and it is possible to avoid the occurrence of problems such as scattering and infiltration with respect to the lens and other parts when the adhesive is applied. .

  Further, there is no need for a curing time for the adhesive and a dedicated jig for applying the adhesive, so that the assembly time can be shortened and the assembly cost can be reduced.

  Further, maintenance work such as replacement of the detection elements 49, 49 can be easily performed by removing the mounting plate spring 50 from the case body 43, and maintenance can be improved.

  Furthermore, in the imaging apparatus 1, since the fixed portion 16 and the fixing member 17 that hold and attach the case body 43 are pressed against the pressed portions 55 and 57, the member to which the case body 43 is attached is provided. The members that hold the pressed portions 55 and 57 are common, and the number of components can be reduced by sharing the components.

  Furthermore, since the holding protrusions 52a and 53a protruding toward the detection elements 49 and 49 are provided on the element pressing portions 52 and 53 of the mounting plate spring 50, respectively, the detection elements 49 and 49 are held on the case body 43. It can be done easily.

  In addition, the attachment leaf spring 50 is attached to the case body 43 so that gaps 59 and 60 are formed between the pressed portions 55 and 57 and the outer surface of the case body 43, respectively. The plate spring 50 can be easily attached.

  The cam cylinder 18 is supported on the fixed ring 17 so as to be movable in the front-rear direction and rotatable in the circumferential direction (see FIGS. 4, 6, and 9).

  The cam cylinder 18 is formed in a substantially annular shape, and has a rack gear 18a at a part of the rear end portion on the outer peripheral surface. Guided projections 18b, 18b, and 18b are provided on the outer peripheral surface of the cam cylinder 18 so as to be spaced apart from each other in the circumferential direction.

  A support groove 18c extending in the circumferential direction is formed at the rear end of the inner peripheral surface of the cam cylinder 18. Guide portions 18d, 18d, and 18d and guide portions 18e, 18e, and 18e each having a predetermined shape are formed on the inner peripheral surface of the cam cylinder 18, and the guide portions 18d, 18d, and 18d and the guide portions 18e and 18e are formed. , 18e are each formed in a groove shape.

  The cam cylinder 18 has guided projections 18 b, 18 b, 18 b slidably engaged with the rectilinear inclination guide grooves 39 a, 39 a, 39 a or the rotation guide grooves 39 b, and is supported movably on the fixed ring 17. The cam cylinder 18 is moved in the front-rear direction while rotating when the guided projections 18b, 18b, 18b are slid with respect to the linear guide grooves 39a, 39a, 39a, and the guided projections 18b, 18b, When 18b is slid in the rotation guide groove 39b, it is rotated without moving in the front-rear direction.

  In a state where the cam cylinder 18 is supported by the fixed ring 17, the rack gear 18 a is engaged with the transmission gear 42 that is rotatably supported between the fixed member 16 and the fixed ring 17. Accordingly, when the motor 46 held by the case body 43 is rotated, the driving force is transmitted to the rack gear 18a via the transmission gear group and the transmission gear 42, and the cam cylinder 18 is moved in a direction corresponding to the rotation direction of the motor 46. Is rotated and moved or rotated in the front-rear direction while rotating with respect to the stationary ring 17.

  A linear guide 61 is supported on the fixed ring 17 so as to be movable in the front-rear direction. The rectilinear guide 61 is formed by integrally forming an annular portion 62 and guide projections 63, 63, 63 projecting forward from the annular portion 62.

  The annular portion 62 is provided with guided protrusions 62a, 62a, 62c that are spaced apart in the circumferential direction and protrude outward. The annular portion 62 is provided with supported protrusions 62b, 62b, and 62b that are spaced apart from each other in the circumferential direction on the front side of the guided protrusions 62a, 62a, and 62c.

  The guide protrusions 63, 63, 63 are formed with sliding grooves 63a, 63a, 63a that open forward and outward, respectively.

  The rectilinear guide 61 is supported by the fixed ring 17 so that the guided projections 62a, 62a, 62c are slidably engaged with the rectilinear guide grooves 39c, 39c, 39c, respectively, and are movable in the front-rear direction. The rectilinear guide 61 has supported projecting pieces 62 b, 62 b, 62 b slidably engaged with the support groove 18 c of the cam cylinder 18, and is rotatable with respect to the cam cylinder 18. Therefore, when the cam cylinder 18 is rotated, the guided protrusions 62a, 62a, 62c of the rectilinear guide 61 are slidably engaged with the rectilinear guide grooves 39c, 39c, 39c, respectively. Is rotated with respect to the rectilinear guide 61, and when the cam cylinder 18 is moved in the front-rear direction with respect to the stationary ring 17, the rectilinear guide 61 is moved in the front-rear direction together with the cam cylinder 18.

  A decorative ring 64 is attached to the front half of the stationary ring 17 (see FIGS. 4 and 6).

  A second movable unit 65 is supported on the cam cylinder 18 (see FIG. 6). The second movable unit 65 includes an intermediate movable unit 66 and a light amount adjusting device 67 attached to the intermediate movable unit 66.

  The intermediate movable unit 66 is formed by supporting or attaching required members to a base frame 68 (see FIGS. 13 to 16).

  The base frame 68 has a disc portion 69 and supported surface portions 70, 70, 70 provided on the outer peripheral portion of the disc portion 69, and the supported surface portions 70, 70, 70 are provided apart from each other in the circumferential direction. It has been.

  A transmission opening 69 a penetrating in the front-rear direction is formed at the center of the disc part 69. Mounting frame portions 69b, 69b, and 69b projecting rearward are provided on the outer peripheral edge of the disc portion 69, and the mounting frame portions 69b, 69b, and 69b are spaced apart in the circumferential direction, and the supported surface portions 70, 70 are provided. , 70.

  On the front surface of the disc portion 69, bearing portions 69c and 69c are provided below the transmission opening 69a, and a bearing portion 69d is provided above the transmission opening 69a. The bearing portions 69c and 69c are provided apart from each other on the left and right.

  Guided portions 69e, 69e, and 69e are provided on the outer peripheral surface of the disc portion 69 so as to be spaced apart in the circumferential direction and protrude outward.

  The supported surface portions 70, 70, 70 of the base frame 68 are respectively formed with supported groove portions 70a, 70a, 70a extending in the front-rear direction.

  Flat yokes 71 and 71 are fixed to the disc portion 69 by, for example, adhesion. The yokes 71 and 71 are respectively fixed to a position near the lower end and a position near the left end on the front surface of the disc portion 69. Driving magnets 72 and 72 are fixed to the front surfaces of the yokes 71 and 71, respectively.

  A first correction moving frame 75 is supported on the front side of the base frame 68 via a first guide shaft 73 and a first sub guide shaft 74 so as to be movable in the left-right direction (first direction) ( (See FIGS. 13 and 14).

  The first correction moving frame 75 is formed with a transmission opening 75a at the center. The first correction moving frame 75 is provided with a first shaft support portion 76 at the lower end, first sub shaft support portions 77 and 77 at the upper end, and a second shaft support at the left end. A portion 78 is provided, and second sub-shaft support portions 79 are provided at the right end portion. The first shaft support portion 76 is formed with a first through hole 76a penetrating left and right, and the second shaft support portion 78 is formed with a second through hole 78a penetrating vertically.

  The center P of the first through hole 76a of the first shaft support portion 76, the center Q of the second through hole 78a of the second shaft support portion 78, and the centers of the holes of the first sub shaft support portions 77 and 77. As shown in FIG. 17, R is located on substantially the same plane orthogonal to the optical axis, and the second sub-axis support parts 79 and 79 are the first axis support part 76 and the second axis support part. It is located in front of the portion 78 and the first sub shaft support portions 77 and 77.

  The first guide shaft 73 is slidably inserted into the first through hole 76 a of the first shaft support portion 76, and the first sub guide shaft 74 is inserted into the first sub shaft support portions 77 and 77. The second guide shaft 80 is fixed to the second through hole 78a of the second shaft support portion 78 by, for example, press-fitting, and the second sub shaft support portions 79 and 79 are fixed to the second sub shaft support portion 79 and 79, respectively. The guide shaft 81 is fixed.

  In the first correction moving frame 75, both end portions of the first guide shaft 73 are fixed to the bearing portions 69c and 69c, and an intermediate portion of the first sub guide shaft 74 is slidably supported by the bearing portion 69d. Thus, the base frame 68 is supported so as to be movable in the left-right direction. Accordingly, the first correction moving frame 75 is slid with respect to the first guide shaft 73 and moved in the left-right direction.

  As described above, the center P of the first through hole 76a of the first shaft support portion 76 and the center Q of the second through hole 78a of the second shaft support portion 78 are substantially the same plane perpendicular to the optical axis. Therefore, the axial center of the first guide shaft 73 and the axial center of the second guide shaft 80 inserted therein are also positioned on substantially the same plane orthogonal to the optical axis.

  The first correction moving frame 75 is formed by injection molding, and the second shaft support portion 78 is formed by a first mold 200 and a second mold 300 that are released in the optical axis direction (FIG. 18 and FIG. 19).

  The first mold 200 is provided with through-hole forming projections 201, 201,... Projecting rearward, and the through-hole forming projections 201, 201,. Is located.

  The second mold 300 is provided with through-hole forming protrusions 301, 301,... Protruding forward, and the through-hole forming protrusions 301, 301,. Is located.

  The first mold 200 and the second mold 300 are abutted in the front-rear direction to form cavities 400, 400,... (See FIG. 18). At this time, the through-hole forming protrusions 201, 201,... Of the first mold 200 and the through-hole forming protrusions 301, 301,. Touched.

  The cavities 400, 400,... Are filled with molten resin 500, 500,..., And the first mold 200 and the second mold 300 are formed after the molten resin 500, 500,. The first correction moving frame 75 is formed by releasing the mold (see FIG. 19). The second through holes 78a of the second shaft support part 78 are so-called by the through hole forming protrusions 201, 201,... And the through hole forming protrusions 301, 301,. It is formed as a cut-off shape.

  As described above, the second through hole 78a of the second shaft support portion 78 can be easily formed as a cut-off shape by the first mold 200 and the second mold 300, and therefore the first correction movement. The manufacturing of the frame 75 can be facilitated and the manufacturing cost can be reduced.

  Further, by forming the second through hole 78a as a cut-off shape, the second through hole 78a can be formed with high accuracy with a simple mold configuration.

  In addition, although the example which formed the 2nd through-hole 78a of the 2nd axis | shaft support part 78 as the biting shape by the 1st metal mold | die 200 and the 2nd metal mold | die 300 was shown above, the 1st axis | shaft was shown. The first through hole 76a of the support portion 76 may be formed as a cut-off shape by two molds, and both the first through-hole 76a and the second through-hole 78a are cut by two molds. It is also possible to form it as a shape. Further, the first sub-shaft support portions 77 and 77 and the second sub-shaft support portions 79 and 79 can be formed in a cut-off shape.

  A second correction moving frame 82 is supported by the first correction moving frame 75 so as to be movable in the vertical direction (second direction) (see FIGS. 14 and 15).

  A lens group 83 is attached to the approximate center of the second correction moving frame 82. The second correction moving frame 82 is provided with supported cylindrical portions 82a and 82a protruding rearward at positions close to the left end, and supported supported portions protruding rightward at the right end portion. 82b is provided.

  The second correction moving frame 82 has large openings 82c and 82c penetrating forward and backward at the left end and the lower end, respectively, and small openings 82d and 82d are formed in the vicinity of the large openings 82c and 82c, respectively. Yes.

  In the second correction moving frame 82, the supported cylindrical portions 82a and 82a are slidably supported on both ends of the second guide shaft 80, and the supported protrusion 82b is an intermediate portion of the second sub shaft 81. It is slidably supported by. Accordingly, the second correction moving frame 82 can be moved in the vertical direction with respect to the first correction moving frame 75, and when the first correction moving frame 75 is moved in the left-right direction, it is integrated. It is moved left and right.

  In a state where the second correction moving frame 82 is supported by the first correction moving frame 75, the large openings 82 c and 82 c are positioned in front of the driving magnets 72 and 72 fixed to the base frame 68, respectively. .

  A circuit board 84 is attached to the front surface of the second correction moving frame 82 (see FIGS. 15 and 16). The circuit board 84 includes a base surface portion 84a facing in the front-rear direction and a first connection surface portion 84b protruding from the upper end portion of the base surface portion 84a.

  The base surface portion 84a is integrally provided with driving coils 85 and 85 at the lower end portion and the left end portion, respectively. Hall elements 84d and 84d for detecting the positions of the first correction moving frame 75 and the second correction moving frame 82 are mounted on the base surface portion 84a in the vicinity of the driving coils 85 and 85, respectively. .

  Circuit wiring (not shown) is formed on the first connection surface portion 84b, and each circuit wiring is connected to the driving coils 85 and 85, respectively.

  The circuit board 84 has a base surface portion 84a attached to the front surface of the second correction moving frame 82 by adhesion or the like, and the first connection surface portions 84b are connected to power supply driving circuits (not shown). In a state where the circuit board 84 is attached to the front surface of the second correction moving frame 82, the driving coils 85 and 85 are positioned inside the large openings 82c and 82c of the second correction moving frame 82, respectively. The elements 84d and 84d are positioned inside the small openings 82d and 82d of the second correction moving frame 82, respectively.

  As described above, the first correction moving frame 75 is supported by the base frame 68 to which the driving magnets 72 and 72 are fixed, and the second correction moving frame 82 is attached to the first correction moving frame 75. In the state where the circuit board 84 is attached to the second correction moving frame 82, the intermediate movable unit is attached to the front surface of the base frame 68 by attaching an outer yoke 86 formed in an approximately L shape by adhesion or the like. 66 is constructed (see FIG. 16).

  The yokes 71 and 71, the drive magnets 72 and 72, the first correction moving frame 75, the first guide shaft 73, the first sub guide shaft 74, the second guide shaft 80, and the second sub guide. Shake correction mechanism 87 is constituted by shaft 81, second correction moving frame 82, drive coils 85 and 85, and outer yoke 86 (see FIG. 13).

  When a drive current is supplied from the power supply drive circuit to the drive coils 85 and 85 in the shake correction mechanism 87, the drive coils 85 and 85 and the drive magnets 72 and 72 determine a predetermined value according to the direction of the supplied drive current. The first correction moving frame 75 and the second correction moving frame 82 that holds the lens group 83 are integrated with each other by the driving force. The second correction moving frame 82 that is guided by the first sub guide shaft 74 and is moved in the left-right direction (first direction) and holds the lens group 83 by this propulsive force is the second guide shaft 80 and It is guided by the second sub-guide shaft 81 and moved in the vertical direction (second direction), and the lens group 83 is moved in a plane orthogonal to the optical axis, so that the focal position is corrected and image blurring occurs. Prevention is done.

  The driving magnets 72 and 72 also function as magnets for detecting the positions of the hall elements 84d and 84d, and are formed long in a predetermined direction so as to face the hall elements 84d and 84d from the driving coils 85 and 85. Yes.

  When the blur correction operation is performed as described above, the second correction moving frame 82 is slid with respect to both ends of the second guide shaft 80. As described above, in the shake correction mechanism 87, a portion other than both ends of the second guide shaft 80 is fixed to the second shaft support portion 78 of the first correction moving frame 75, and the second guide shaft 80. The second correction moving frame 82 is configured to be moved with respect to both ends of the second guide shaft 80, and the supported cylindrical portion 82 a of the second correction moving frame 82 is positioned on both ends of the second guide shaft 80. Since the sliding clearance is formed between the second correction moving frame 82 and the movement of the second correction moving frame 82, the reliability of the blur correction operation can be improved.

  A light amount adjusting device 67 is attached to the rear surface side of the intermediate movable unit 66, and the second movable unit 65 is configured by both of them (see FIGS. 20 and 21).

  As shown in FIGS. 6 and 22, the second movable unit 65 includes supported groove portions 70 a, 70 a, 70 a formed in the supported surface portions 70, 70, 70 of the base frame 68. The guided portions 69e, 69e, and 69e are slidably supported by the guide portions 18d, 18d, and 18d of the cam cylinder 18, respectively. Accordingly, the position of the guided portions 69e, 69e, 69e with respect to the guide portions 18d, 18d, 18d is changed by the rotation of the cam cylinder 18, and the second movable unit 65 is guided by the rectilinear guide 61 and moved in the front-rear direction (optical axis direction). ).

  In the lens barrel 3, the rectilinear guide 61 is not formed entirely in a cylindrical shape, but is constituted by an annular portion 62 and a plurality of guide projections 63, 63, 63 protruding from the annular portion 62. Because of the shape, it is possible to facilitate the assembly of the second movable unit 65 to the rectilinear guide 61.

  In the state where the second movable unit 65 is supported by the rectilinear guide 61 as described above, as shown in FIG. 22, one guide protrusion 63 of the rectilinear guide 61 between the driving coils 85, 85, that is, A guide protrusion 63 (a guide protrusion 63A shown in FIG. 22) that exists diagonally to the left is positioned correspondingly. Accordingly, when the second movable unit 65 is moved in the optical axis direction by the rotation of the cam cylinder 18 and when the rectilinear guide 61 is moved in the optical axis direction together with the cam cylinder 18, the driving coil 85 is driven. 85 and the guide projection 63A do not interfere with each other, and the interference between the blur correction mechanism 87 disposed inside the lens barrel 3 and other mechanisms can be easily avoided. Can be achieved.

  In the imaging apparatus 1, the guide protrusions 63, 63, 63 of the rectilinear guide 61 are used as guide means for the longitudinal movement of the second movable unit 65, and the rectilinear guide 61 is integrated with the cam cylinder 18 in the longitudinal direction. Therefore, for example, the linear guide 61 is moved in the front-rear direction as compared with the case where the guide shaft fixed inside the lens barrel 3 is used as the guide means of the second movable unit 65. Therefore, the length of the lens barrel 3 in the optical axis direction can be shortened.

  Furthermore, since the three guide protrusions 63, 63, 63 provided in the circumferential direction on the linear guide 61 are provided, the holding force of the linear guide 61 with respect to the second movable unit 65 is large. It is possible to stabilize the movement of the movable unit 65 in the optical axis direction.

  In the above, an example in which three guide protrusions 63, 63, 63 are provided on the rectilinear guide 61 in the circumferential direction is shown. However, the number of guide protrusions 63, 63, 63 is limited to three. It is optional and any number may be used.

  Furthermore, since the rectilinear guide 61 is formed integrally with the annular portion 62 and the guide protrusions 63, 63, 63, it is possible to reduce the number of parts and the manufacturing cost.

  Further, as described above, in the imaging apparatus 1, the first guide shaft 73 and the second guide shaft 80 that guide the first correction moving frame 75 in the shake correction mechanism 87 are orthogonal to the optical axis. Since they are positioned on substantially the same plane, the length of the blur correction mechanism 87 in the optical axis direction can be shortened, and the lens barrel 3 can be downsized.

  In addition, in the blur correction mechanism 87, the first correction moving frame 75 is slidably supported on the first guide shaft 73, and the second guide shaft 80 is supported by the first correction moving frame 75. Therefore, when the first correction moving frame 75 is moved, both the first guide shaft 73 and the second guide shaft 80 are not moved, and only the second guide shaft 80 is moved. Therefore, the length in one axial direction can be shortened accordingly.

  The light amount adjusting device 67 of the second movable unit 65 is attached to the rear surface side of the base frame 68 (see FIGS. 20 and 21).

  The light quantity adjusting device 67 is formed by supporting or attaching each required member to a base body 88 (see FIGS. 20, 21, 23, and 24).

  As shown in FIG. 25, the base body 88 is formed in a substantially annular shape with a resin material, and has a shallow mounting recess 90 opened forward in a portion excluding the outer peripheral portion 89 on the front surface side. The base body 88 is formed such that the thickness of the portion where the mounting recess 90 is formed is thinner than the thickness of the outer peripheral portion 89.

  A thin portion 88b is provided in a part of the rear surface side of the base body 88 by forming a groove-shaped notch 88a that is opened rearward (see FIG. 20). The thin portion 88b is thicker than the other portions. Thinly formed.

  Engaging claws 89a, 89a, 89a are provided on the outer peripheral portion 89 of the base body 88 so as to be spaced apart from each other in the circumferential direction (see FIGS. 23 and 24). Mounting protrusions 89b, 89b, and 89b are provided on the outer peripheral surface of the base body 88 so as to be spaced apart from each other in the circumferential direction.

  Formed holes 89c, 89c, 89c opened rearward are formed in the outer peripheral portion 89 of the base body 88 (see FIG. 26), and the formed holes 89c, 89c, 89c are spaced apart in the circumferential direction. The front end portions of the molding holes 89c, 89c, 89c are formed as mounting grooves 89d, 89d, 89d communicating with the mounting recess 90, respectively.

  The base body 88 is molded by injection molding, and the molding holes 89c, 89c, 89c including the mounting grooves 89d, 89d, 89d are formed by the first mold 600 and the second mold 700 which are released in the optical axis direction. It is formed (see FIGS. 27 and 28).

  The first mold 600 is provided with mounting groove forming protrusions 601, 601, 601 protruding backward.

  The second mold 700 is provided with mounting groove forming protrusions 701, 701, 701 protruding forward.

  The first mold 600 and the second mold 700 are abutted in the front-rear direction to form cavities 800, 800,... (See FIG. 27). At this time, part of the mounting groove forming protrusions 601, 601, 601 of the first mold 600 and the mounting groove forming protrusions 701, 701, 701 of the second mold 700 are in contact with each other.

  The cavities 800, 800,... Are filled with molten resin 900, 900,..., And after the molten resin 900, 900,. The base body 88 is formed by releasing the mold (see FIG. 28). The forming holes 89c, 89c, 89c including the mounting grooves 89d, 89d, 89d have a so-called cut-off shape by the mounting groove forming projections 601, 601, 601 and the mounting groove forming projections 701, 701, 701 that are in contact with each other. It is formed.

  As described above, since the molding holes 89c, 89c, 89c including the mounting grooves 89d, 89d, 89d can be easily formed as a cut-off shape by the first mold 600 and the second mold 700, the base body 88 is formed. It is possible to facilitate manufacture and reduce manufacturing costs.

  Further, by forming the forming holes 89c, 89c, 89c including the mounting grooves 89d, 89d, 89d as a cut-off shape, the mounting grooves 89d, 89d, 89d can be formed with high accuracy with a simple mold configuration. .

  A large through hole 90a is formed in the mounting recess 90 (see FIG. 25). The mounting recess 90 is provided with a filter rotation center shaft 90b protruding forward and shutter rotation center shafts 90c and 90d protruding forward, respectively, at positions around the through hole 90a. The mounting recess 90 is formed with arc-shaped insertion holes 90e and 90f penetrating forward and backward.

  The filter rotation center shaft 90b and the shutter rotation center shafts 90c and 90d are positioned on substantially opposite sides of the through hole 90a, and the shutter rotation center shafts 90c and 90d are spaced apart in the circumferential direction. The insertion hole 90e is positioned in the vicinity of the filter rotation center shaft 90b, and the insertion hole 90f is positioned between the shutter rotation center shafts 90c and 90d.

  The base body 88 is provided with arrangement step portions 90g, 90g, 90g protruding forward on the outer peripheral portion of the mounting recess 90 in the circumferential direction.

  A cover plate 91, a first separator 92, and a second separator 93 are attached to the front side of the base body 88 (see FIG. 24).

  The cover plate 91 is made of, for example, a metal material, and includes a cover portion 94 facing in the front-rear direction and attached protrusions 95, 95, 95 protruding rearward from the outer peripheral portion of the cover portion 94.

  A light transmission hole 94 a smaller than the through hole 90 a of the base body 88 is formed at the center of the cover portion 94. The cover portion 94 is provided with first sliding protrusions 94b and 94b and second sliding protrusions 94c and 94c formed by being driven backward (see FIGS. 23 and 29).

  The first sliding protrusions 94b and 94b and the second sliding protrusions 94c and 94c are positioned on substantially opposite sides of the through hole 94a, and are each formed in an arc shape. The first sliding projections 94b and 94b and the second sliding projections 94c and 94c have different projection amounts, that is, the ejection amounts, and the heights of the first sliding projections 94b and 94b are the second sliding projections. It is made higher than the height of the moving protrusions 94c, 94c.

  On the outer peripheral portion of the cover portion 94, shaft insertion holes 94d, 94e, 94f and insertion holes 94g, 94h each formed in an arc shape are formed. The shaft insertion hole 94d and the shaft insertion holes 94e and 94f are positioned on the substantially opposite sides across the light transmission hole 94a, the shaft insertion holes 94e and 94f are spaced apart in the circumferential direction, and the insertion hole 94g is the shaft insertion hole. The insertion hole 94h is positioned between the shaft insertion holes 94e and 94f.

  The first sliding projections 94b and 94b are formed in an arc shape centered on the shaft insertion hole 94f, and the second sliding projections 94c and 94c are formed in an arc shape centered on the shaft insertion hole 94e. Yes.

  Protrusions 94i and 94i are formed at predetermined positions of the cover portion 94 so as to be ejected rearward.

  Engagement holes 95a, 95a, and 95a are formed in the mounting projection pieces 95, 95, and 95, respectively.

  The first separator 92 is formed, for example, in the form of a sheet of a resin material such as polyethylene terephthalate or a metal material, and has a transmission hole 92a formed in a central portion that is substantially the same size as the light transmission hole 94a of the cover plate 91. is doing. On the outer periphery of the first separator 92, shaft insertion holes 92b, 92c, and 92d and insertion holes 92e and 92f that are formed in an arc shape are formed. The shaft insertion hole 92b and the shaft insertion holes 92c and 92d are positioned on the substantially opposite sides across the transmission hole 92a, the shaft insertion holes 92c and 92d are spaced apart in the circumferential direction, and the insertion hole 92e is positioned on the shaft insertion hole 92b. The insertion hole 92f is positioned between the shaft insertion holes 92c and 92d.

  For example, the second separator 93 is formed in a sheet shape from a resin material such as polyethylene terephthalate or a metal material, and has a transmission hole 93a formed in a central portion of the same size as the light transmission hole 94a of the cover plate 91. is doing. On the outer periphery of the first separator 93, shaft insertion holes 93b and 93c and insertion holes 93d and 93e formed in arc shapes are formed. The shaft insertion hole 93b and the shaft insertion hole 93c are positioned on substantially opposite sides of the transmission hole 93a, and the insertion holes 93d and 93e are positioned in the vicinity of the shaft insertion holes 93b and 93c, respectively.

  On the outer peripheral portion of the second separator 93, mounting projections 93f, 93f, 93f that protrude outward are provided in a circumferentially spaced manner.

  Shutter blades 96 and 97 used as the first light amount adjustment blades and a light amount adjustment blade 98 provided as the second light amount adjustment blades are rotatably supported on the base body 88.

  Each of the shutter blades 96 and 97 is made of a sheet-like material, and has shaft insertion holes 96a and 97a and action holes 96b and 97b that are long in one direction at one end.

  As shown in FIG. 30, the light amount adjusting blade 98 is formed by, for example, sticking sheet members 100, 100 on both surfaces of the light reducing filter 99, and a first separator 92 is formed on the sheet members 100, 100. The circular holes 100a and 100a having a diameter larger than that of the transmission hole 92a are formed. Accordingly, the light quantity adjusting blade 98 exposes the light reducing filter 99 at a position corresponding to the circular holes 100a and 100a. As the dimming filter 99, an ND (Neutral Density) filter is used.

  A shaft insertion hole 98a and a long working hole 98b in one direction are formed in one end of the light amount adjusting blade 98 (see FIG. 23).

  The second separator 93 is elastically deformed so as to be bent as a whole (see FIG. 31), is elastically restored, and the mounting protrusions 93f, 93f, 93f are inserted into the mounting grooves 89d, 89d, 89d, respectively. It is disposed and attached to the mounting recess 90 of the base body 88 (see FIG. 32). The second separator 93 is brought into surface contact with the front surface of the mounting recess 90 in a state where it is attached to the base body 88 (see FIG. 33). At this time, the filter rotation center shaft 90b and the shutter rotation center shaft 90c of the base body 88 are inserted into the shaft insertion holes 93b and 93c of the second separator 93, respectively. The shutter rotation center shaft 90 d is positioned just outside the second separator 93.

  A light amount adjustment blade 98 is supported on the front side of the second separator 93. The light amount adjusting blade 98 is inserted into the shaft insertion hole 98a with the filter rotation center shaft 90b of the base body 88, and is rotatably supported by the base body 88 with the filter rotation center shaft 90b as a fulcrum.

  In a state where the light quantity adjusting blade 98 is supported by the base body 88, the first separator 92 is arranged and attached to the arrangement step portions 90 g, 90 g, 90 g of the base body 88. Therefore, the light quantity adjusting blade 98 can be rotated while sliding between the first separator 92 and the second separator 93.

  The light amount adjusting blade 98 has a three-sheet structure formed by adhering the sheet members 100 and 100 to both surfaces of the dimming filter 99 as described above, and the first separator 92 and the second separator 93 It is possible to prevent damage and damage to the filter 99 for dimming when rotating between the two.

  Although an example in which an ND filter is used as the light amount adjusting blade 98 has been described above, the light amount adjusting blade 98 is not limited to the ND filter and has an opening diameter smaller than that of the transmission hole 92a of the first separator 92. It may be a diaphragm blade or a combination of a diaphragm blade and an ND filter.

  In a state where the first separator 92 is attached to the base body 88, the shutter blades 96 and 97 are rotatably supported by the base body 88. The shutter blades 96 and 97 have shaft rotation centers 90c and 90d of the base body 88 inserted into shaft insertion holes 96a and 97a, respectively, and partially overlapped with the shutter rotation centers 90c and 90d serving as fulcrums. In this state, the base body 88 is rotatably supported.

  In a state where the shutter blades 96 and 97 are supported by the base body 88, the cover plate 91 is attached to the base body 88. The cover plate 91 is attached to the base body 88 by engaging the engagement claws 89a, 89a, 89a with the engagement holes 95a, 95a, 95a of the protrusions 95, 95, 95 for attachment. Accordingly, the shutter blades 96 and 97 are rotatable between the cover plate 91 and the first separator 92.

  At this time, the projections 94i, 94i,... Of the cover plate 91 come into contact with the front surface of the first separator 92, and a moving space for the shutter blades 96, 97 is secured between the cover plate 91 and the first separator 92. The The protrusions 94i, 94i,... Are provided at portions other than the portion that becomes the movement locus of the shutter blades 96, 97.

  Further, as described above, the first sliding protrusions 94b, 94b and the second sliding protrusions 94c, 94c of the cover plate 91 are formed at different heights, and the first sliding protrusion 94b. 94b, the shutter blade 97 is slid, and the shutter blade 96 is slid on the second sliding protrusions 94c, 94c.

  As described above, in the light amount adjusting device 67, the first sliding protrusions 94b and 94b and the second sliding protrusions 94c and 94c of the cover plate 91 are formed at different heights. 96 and the shutter blades 97 can be held at different positions in the thickness direction, and the shutter blades 96 and 97 hardly interfere with each other at the time of rotation, and the operation of the shutter blades 96 and 97 can be made smooth.

  Further, as described above, the first sliding protrusions 94b and 94b are formed in an arc shape centering on the shaft insertion hole 94f, and the second sliding protrusions 94c and 94c are centered on the shaft insertion hole 94e. Therefore, the frictional resistance of the shutter blades 96 and 97 with respect to the second sliding protrusions 94c and 94c and the first sliding protrusions 94b and 94b hardly changes during rotation. Smooth operation of the blades 96 and 97 can be achieved.

  In the light amount adjusting device 67, a light amount adjusting blade 98 is disposed between the first separator 92 and the second separator 93, and the first separator 92 and the first sliding protrusions 94b, 94b, and Shutter blades 96 and 97 are arranged between the cover plate 91 having the second sliding protrusions 94c and 94c.

  By disposing the shutter blades 96 and 97 on the side having a small frictional resistance in this way, the operation of the shutter blades 96 and 97 that require a particularly accurate rotation operation becomes smooth, and the operation performed in the lens barrel 3 is improved. Reliability can be improved.

  A first actuator 101 and a second actuator 102 are attached to the rear surface of the base body 88 (see FIG. 23).

  The first actuator 101 has a yoke member 103, a coil 104 held by the yoke member 103, and a drive arm 106. The drive arm 106 has a base portion 106a and an arm portion 106b protruding forward from the base portion 106a. It consists of. A magnetized magnet 105 is integrally held on the base portion 106 a of the drive arm 106.

  The second actuator 102 includes a yoke member 107, a coil 108 held by the yoke member 107, and a drive arm 110. The drive arm 110 has a base portion 110a and an arm portion 110b protruding forward from the base portion 110a. It consists of. A magnetized magnet 109 is integrally held on the base portion 110 a of the drive arm 110.

  The first actuator 101 and the second actuator 102 generate thrust between the coils 104 and 108 and the magnets 105 and 109 according to the currents flowing through the coils 104 and 108, respectively, and the driving arms 106 and 110 are generated by this thrust. Is rotated in the direction corresponding to the direction of the current flowing through the coils 104 and 108.

  The first actuator 101 and the second actuator 102 are attached by being pressed from behind by a pressing plate 111 at positions separated in the circumferential direction of the base body 88. The holding plate 111 is formed in a substantially horseshoe shape, and is fixed to the base body 88 by, for example, screwing. The holding plate 111 is fixed to a portion of the base body 88 other than the thin portion 88b (see FIGS. 20 and 21).

  In a state in which the first actuator 101 and the second actuator 102 are attached to the base body 88, the arm portion 106b of the drive arm 106 includes the insertion hole 90f of the base body 88, the insertion hole 93e of the second separator 93, the first The separator 92 is inserted through the insertion hole 92f, the shutter holes 96 and 97, the operation holes 96b and 97b, and the cover plate 91 through the insertion hole 94h, and the arm 110b of the drive arm 110 is inserted into the insertion hole 90e of the base body 88. The insertion hole 93d of the second separator 93, the action hole 98b of the light amount adjusting blade 98, the insertion hole 92e of the first separator 92, and the insertion hole 94g of the cover plate 91 are inserted in order.

  When the driving arm 106 is rotated by driving the first actuator 101, the opening edges of the action holes 96 b and 97 b are pressed by the arm portion 106 b, and the shutter blades 96 and 97 correspond to the direction of the current flowing through the coil 104. When the driving arm 110 is rotated by driving the second actuator 102, the opening edge of the action hole 98b is pressed by the arm portion 110b, and the direction of the current that the light amount adjusting blade 98 flows to the coil 108 It is rotated in the direction corresponding to.

  A wiring board 112 is attached to the rear surface of the pressing plate 111 (see FIG. 4). The wiring board 112 is connected to the coils 104 and 108 and has a function of supplying power to the coils 104 and 108.

  In the light amount adjusting device 67 configured as described above, the mounting protrusions 89b, 89b, 89b provided on the outer peripheral surface of the base body 88 are engaged with the mounting frame portions 69b, 69b, 69b of the base frame 68, respectively. The second movable unit 65 is configured by the intermediate movable unit 66 and the light quantity adjusting device 67.

  As described above, in the light amount adjusting device 67, the light amount adjusting blade 98 is positioned between the second separator 93 and the first separator 92 attached to the base body 88. Therefore, the through hole 90a of the base body 88 can be made larger than the through hole 93a of the second separator 93, and accordingly, a member disposed behind the base body 88, that is, the holding arm 29 of the focus moving unit 28. Can be moved to a position where it is inserted into the through-hole 90a (see FIG. 33), and the lens barrel 3 can be thinned in the optical axis direction.

  Further, the second separator 93 is elastically deformed so that the mounting protrusions 93f, 93f, 93f are inserted into the mounting grooves 89d, 89d, 89d formed in a so-called cut-off shape so that the second separator 93 is attached to the base body 88. The second separator 93 can be easily attached to the base body 88, and the attachment grooves 89d, 89d, and 89d can be easily formed.

  Further, in the light amount adjusting device 67, a plurality of mounting projections 93f, 93f, 93f that are inserted into the mounting grooves 89d, 89d, 89d of the base body 88 and mounted on the outer peripheral portion of the second separator 93 are provided around the periphery. Since they are provided apart in the direction, the attachment state of the second separator 93 to the base body 88 can be stabilized.

  In addition, in the light amount adjusting device 67, the second sliding protrusions 94c and 94c and the first sliding protrusions on which the cover plate 91 is formed of a metal material and the shutter blades 96 and 97 are slid. Since 94b and 94b are provided, the frictional force during the operation of the shutter blades 96 and 97 is small, so that the operational reliability can be improved and the power consumption can be reduced.

  The first movable unit 19 includes a moving frame 113 and a lens group 114 (see FIGS. 4 and 6). As shown in FIGS. 34 and 35, the moving frame 113 includes a plate-shaped annular portion 115 facing in the front-rear direction and a peripheral surface portion 116 provided on the outer peripheral edge of the annular portion 115, and the peripheral surface portion 116. Is projected forward and rearward from the annular portion 115.

  In the moving frame 113, the peripheral surface portion 116 protrudes forward and rearward from the annular portion 115, so that a front concave portion 113a opened forward and a rear concave portion 113b opened rearward are formed.

  A lens group 114 is attached to the center of the annular portion 115 via a lens holder 117.

  Guided portions 116 a, 116 a, 116 a protruding outward are provided on the outer peripheral surface of the peripheral surface portion 116 so as to be spaced apart in the circumferential direction. On the inner side of the peripheral surface portion 116 on the rear side of the annular portion 115, supported ridges 116b, 116b, 116b protruding inward are provided apart in the circumferential direction. The supported ridges 116b, 116b, 116b are formed to extend in the front-rear direction.

  Insertion notches 116c, 116c, 116c opened rearward are formed in the rear end portion of the peripheral surface portion 116 so as to be spaced apart in the circumferential direction.

  In the first movable unit 19, the supported protrusions 116 b, 116 b, 116 b provided on the inner peripheral surface of the peripheral surface portion 116 of the moving frame 113 are slide grooves of the guide protrusions 63, 63, 63 of the linear guide 61, respectively. The guided portions 116a, 116a, 116a provided on the outer peripheral surface of the peripheral surface portion 116 are slidably supported by the guide portions 18e, 18e, 18e of the cam barrel 18, respectively. Supported. Accordingly, the position of the guided portions 116a, 116a, 116a with respect to the guide portions 18e, 18e, 18e is changed by the rotation of the cam cylinder 18, and the first movable unit 19 is guided by the straight guide 61 and moved in the front-rear direction (optical axis direction) ).

  A lens barrier 118 is attached to the front side of the first movable unit 19 (see FIGS. 4 and 6). The lens barrier 118 includes a pair of opening and closing members 119 and 119 supported by a circular holder 120, and the optical path is opened and closed by operating the opening and closing members 119 and 119. The circular holder 120 is formed by connecting a front member 120a and a rear member 120b at the front and rear.

  In the lens barrier 118, the outer peripheral portion of the circular holder 120 is attached to the front surface of the peripheral surface portion 116 of the moving frame 113, and the opening / closing member 119 is positioned in the front concave portion 113 a of the moving frame 113.

  In a state where the lens barrier 118 is attached to the first movable unit 19, the decoration ring 121 is attached to the outer surface side of the moving frame 113 and the circular holder 120.

  In the state in which the lens barrel 3 is configured as described above, as shown in FIG. 22, the light amount adjusting device 67 is provided between the guide protrusions 63, 63, 63 of the rectilinear guide 61 as seen from the optical axis direction. The first actuator 101, the second actuator 102 of the light amount adjusting device 67, and the arm portion 32 of the holding arm 29 of the focus moving unit 28 are positioned.

  Therefore, when the light amount adjusting device 67 and the focus moving unit 28 are moved in the optical axis direction, the guide protrusion 63 of the rectilinear guide 61 that guides the first movable unit 19 and the second movable unit 65 in the optical axis direction. 63, 63 and the first actuator 101, the second actuator 102, and the holding arm 29 do not interfere with each other, and the size can be reduced by effectively using the arrangement space.

  The base body 88 of the second movable unit 65 is formed with a thin portion 88b and the holding plate 111 is formed in a substantially horseshoe shape and is fixed to a portion other than the thin portion 88b of the base body 88 (see FIG. 21). ) When the holding arm 29 is moved forward, the arm portion 32 is inserted into the notch 88a for forming the thin portion 88b. Accordingly, the second movable unit 65 and the fixed member 16 that supports the focus moving unit 28 can be disposed close to each other, and the lens barrel 3 can be thinned in the optical axis direction.

  Further, since one guide protrusion 63 (guide protrusion 63A shown in FIG. 22) of the rectilinear guide 61 is positioned between the drive coils 85 and 85 of the shake correction mechanism 87 in the optical axis direction, the drive coil 85 is provided. , 85 and the guide projection 63A are avoided, and the lens barrel 3 can be further reduced in size.

  Further, since the guide protrusions 63, 63, 63 of the rectilinear guide 61 are provided at substantially equal intervals in the circumferential direction, the first movable unit 19 and the second movable unit 65 are moved in the optical axis direction. The operation can be stabilized.

  In the lens barrel 3 configured as described above, the state in which the first movable unit 19, the second movable unit 65, and the focus moving unit 28 are all located at the moving end on the rear side is as follows. It is set as the retracted position stored in the inside (see FIG. 6). At the retracted position, the lens barrel 3 does not protrude forward from the apparatus main body 2 (see FIG. 1).

  When the retracted position (see FIG. 6) reaches the wide-angle position (see FIG. 36), the cam cylinder 18 is moved forward while rotating, and the rectilinear guide 61 is moved forward together with the cam cylinder 18. The first movable unit 19 and the second movable unit 65 are moved forward by the rotation of the cam cylinder 18, but the amount of forward movement of the first movable unit 19 is large and forward of the second movable unit 65. The amount of movement is small.

  When reaching from the wide-angle position to the telephoto position (see FIG. 37), the cam cylinder 18 is rotated without being moved in the front-rear direction. The second movable unit 65 is moved forward so as to approach the first movable unit 19 by the rotation of the cam cylinder 18. In the telephoto position, the second movable unit 65 is inserted into the insertion notches 116c, 116c, and 116c formed in the moving frame 113 by the guided portions 69e, 69e, and 69e provided on the base frame 68 (FIG. 35). (See FIG. 37), except for a part of the rear concave portion 113b of the first movable unit 19 (see FIG. 37).

  The focus moving unit 28 is operated separately from the first movable unit 19 and the second movable unit 65, and the focus lens group 30 moves in the optical axis direction in each state from the retracted position to the telephoto position. The focus function is executed by being moved.

  As described above, the lens group 114 of the first movable unit 19, the lens group 83 of the second movable unit 65, and the focus lens group 30 of the focus moving unit 28 are moved in the optical axis direction when zooming or focusing is performed. The lens group 114 functions as a first lens group, the lens group 83 functions as a second lens group, and the focus lens group 30 functions as a third lens group. The lens group 114, the lens group 83, and the focus lens group 30 may be a combination of a plurality of lenses or a single lens.

  When reaching from the telephoto position to the wide-angle position, the cam barrel 18 is moved in the opposite direction without moving in the front-rear direction, so that the second movable unit 65 is separated from the first movable unit 19 backward. When moved from the wide-angle position to the retracted position, the cam cylinder 18 is moved backward in the same manner as the linear guide 61 while rotating in the opposite direction, and the first movable unit 19 and the second movable unit 65 are moved. Moved backwards.

  Incidentally, in the base frame 68 of the second movable unit 65, as shown in FIG. 35, the outer peripheral surface is cut to form a plurality of planar portions, and the left side faces the left side. The plane portion 68A is formed as a second plane portion 68B facing downward and to the right.

  An advantageous arrangement space for the driving coil 85 is ensured by setting the longitudinal direction of the one driving coil 85 in the vertical direction in accordance with the first flat portion 68A.

  In addition, a second flat portion 68B is formed in alignment with the right end of the moving range of the first correction moving frame 75, and a second hall element 84d is positioned in the vicinity with respect to the driving coil 85. It arrange | positions at the plane part 68B side (right side). Thus, by arranging the Hall element 84d having a small outer shape on the second plane portion 68B side from the driving coil 85 having a large outer shape, the arrangement space is effectively utilized.

  Further, in the second movable unit 65, the first correction moving frame 75 is guided by the first guide shaft 73 by the driving coil 85 located on the left side and moved in the left-right direction, and is moved downward. The second correction moving frame 82 is guided by the second guide shaft 80 and moved in the vertical direction by the driving coil 85 positioned. At this time, the driving coil 85 located on the left side is disposed closer to the first guide shaft 73 than the hall element 84d located in the vicinity, and the driving coil 85 located below is located second from the hall element 84d located in the vicinity. , The drive coil 85 for moving left and right and the first guide shaft 73 for guiding left and right are located close to each other and moved up and down. Since the driving coil 85 for performing the movement and the second guide shaft 80 for performing the vertical guidance are positioned close to each other, the first correction moving frame 75 and the second correction moving frame 82 It is difficult to cause twisting during movement, and the operation can be smoothed.

  The specific shapes and structures of the respective parts shown in the above-described best mode are merely examples of the implementation of the present invention, and the technical scope of the present invention is limited by these. It should not be interpreted in a general way.

FIG. 2 to FIG. 37 show the best mode of the present invention, and this figure is a perspective view of the imaging apparatus shown in a state where the lens barrel is housed in the apparatus main body. It is a perspective view of an imaging device shown in a state where a lens barrel protrudes from the device main body. It is a perspective view which shows an imaging device in the state seen from the opposite side to FIG.1 and FIG.2. It is a disassembled perspective view of a lens barrel. It is an expansion perspective view of a lens barrel. It is an expanded sectional view of the lens barrel which shows the state in a retracted position. It is an expansion disassembled perspective view which shows a fixing member, a focus motor unit, and a focus movement unit. FIG. 6 is an enlarged perspective view showing a state where a focus motor unit and a focus movement unit are supported by a fixed member. It is an expansion disassembled perspective view which shows a fixed ring, a cam cylinder, and a rectilinear guide. It is an expansion disassembled perspective view which shows the attachment state of a case body. It is an expansion disassembled perspective view which shows a case body and each member attached to this. It is an expanded sectional view which shows the attachment state of a case body. The intermediate movable unit is shown together with FIGS. 14 to 16, and this figure is an exploded perspective view of the whole. It is an expansion disassembled perspective view which shows the state by which the 1st correction | amendment moving frame is supported by the base frame. It is an expansion exploded perspective view showing the state where the 1st correction movement frame and the 2nd correction movement frame are supported by the base frame. It is an expansion perspective view which decomposes | disassembles and shows an outer yoke and another member. It is an expanded sectional view of the 1st correction moving frame. FIG. 19 and FIG. 19 show the procedure for forming the first correction moving frame. This figure shows a state in which the first mold and the second mold are abutted and the cavity is filled with the molten resin. It is an expanded sectional view shown. It is an expanded sectional view showing the state where the 1st metallic mold and the 2nd metallic mold were released, and the 1st correction moving frame was fabricated. It is an expansion perspective view which isolate | separates and shows an intermediate | middle movable unit and a light quantity adjustment apparatus. It is an expansion perspective view of the 2nd movable unit. It is a general | schematic enlarged front view which shows the positional relationship of the guide protrusion of a rectilinear guide, and each other part. It is a disassembled perspective view of a light quantity adjustment apparatus. It is an expansion perspective view of a light quantity adjustment device. It is an expansion perspective view of a base body. It is an expanded sectional view of a base body. FIG. 28 shows a molding procedure of the base body together with FIG. 28, and is an enlarged sectional view showing a state in which the first mold and the second mold are abutted and the cavity is filled with the molten resin. is there. It is an expanded sectional view showing the state where the 1st metallic mold and the 2nd metallic mold were released and the base object was fabricated. It is an expansion disassembled perspective view which shows a cover board and a shutter blade | wing. It is an expansion disassembled perspective view of a light quantity adjustment blade. It is an expanded sectional view showing the state before the 2nd separator is attached to a base body. It is an expanded sectional view showing the state where the 2nd separator was attached to the base body. It is a general | schematic expanded sectional view of a light quantity adjustment blade. It is an expansion disassembled perspective view which shows a moving frame and a base frame. It is a general | schematic enlarged front view which shows the positional relationship with a moving frame, a base frame, and each other part. It is an expanded sectional view of the lens barrel which shows the state in a wide angle position. It is an expanded sectional view of the lens barrel which shows the state in a telephoto position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Imaging device, 2 ... Apparatus main body, 3 ... Lens barrel (collapse type lens barrel), 17 ... Fixed ring, 18 ... Cam cylinder, 18d ... Guide part, 18e ... Guide part, 19 ... 1st movable unit , 61 ... Linear guide, 62 ... Annular part, 63 ... Guide protrusion, 65 ... Second movable unit, 68 ... Base frame (second moving frame), 69e ... Guided part, 72 ... Driving magnet, 83 ... lens group (second lens group), 85 ... driving coil, 87 ... blur correction mechanism, 113 ... moving frame (first moving frame), 114 ... lens group (first lens group), 116a ... covered Guide

Claims (5)

A retractable lens barrel in which a first movable unit having at least a first lens group and a second movable unit having at least a second lens group are moved in the optical axis direction of each lens group with respect to the fixed ring. Because
A first moving frame that holds the first lens group and is moved in the optical axis direction and has a guided portion;
A second moving frame that holds the second lens group and is moved in the optical axis direction and has a guided portion;
A shake correction mechanism that performs a shake correction by moving the second lens group supported by the second moving frame in a plane perpendicular to the optical axis direction;
The guide portion of the first moving frame is slidably engaged, and the guide portion of the second moving frame is slidably engaged. A cam cylinder that rotates in a direction around the axis and moves the first moving frame and the second moving frame in the optical axis direction;
A linear guide that restricts rotation of the first moving frame and the second moving frame in the direction around the optical axis when the cam barrel rotates and guides the first moving frame and the second moving frame in the optical axis direction; ,
An annular portion extending in the direction around the optical axis and a plurality of guide projections protruding from the annular portion in the optical axis direction and spaced apart in the direction around the optical axis are provided in the linear guide,
The shake correction mechanism is provided with a pair of drive magnets and a pair of drive coils arranged separately in a plane perpendicular to the optical axis,
The first moving frame and the annular portion of the straight guide are positioned on the opposite side in the optical axis direction across the second lens group,
A retractable lens barrel characterized in that one of the guide protrusions of the linear guide is positioned correspondingly between a pair of drive coils. The cam cylinder and linear guide can be moved in the optical axis direction with respect to the fixed ring,
The collapsible lens barrel according to claim 1, wherein the linear guide is moved in the optical axis direction integrally with the cam barrel when the cam barrel is moved in the optical axis direction. The retractable lens barrel according to claim 1, wherein at least three guide protrusions of the rectilinear guide are provided. The retractable lens barrel according to claim 1, wherein the annular portion of the rectilinear guide and the plurality of guide protrusions are integrally formed. A retractable lens barrel in which a first movable unit having at least a first lens group and a second movable unit having at least a second lens group are moved in the optical axis direction of each lens group with respect to the fixed ring. An imaging device comprising:
An apparatus body for supporting a retractable lens barrel;
A first moving frame that holds the first lens group and is moved in the optical axis direction and has a guided portion;
A second moving frame that holds the second lens group and is moved in the optical axis direction and has a guided portion;
A shake correction mechanism that performs a shake correction by moving the second lens group supported by the second moving frame in a plane perpendicular to the optical axis direction;
The guide portion of the first moving frame is slidably engaged, and the guide portion of the second moving frame is slidably engaged. A cam cylinder that rotates in a direction around the axis and moves the first moving frame and the second moving frame in the optical axis direction;
A linear guide that restricts rotation of the first moving frame and the second moving frame in the direction around the optical axis when the cam barrel rotates and guides the first moving frame and the second moving frame in the optical axis direction; ,
An annular portion extending in the direction around the optical axis and a plurality of guide projections protruding from the annular portion in the optical axis direction and spaced apart in the direction around the optical axis are provided in the linear guide,
The shake correction mechanism is provided with a pair of drive magnets and a pair of drive coils arranged separately in a plane perpendicular to the optical axis,
The first moving frame and the annular portion of the straight guide are positioned on the opposite side in the optical axis direction across the second lens group,
An imaging apparatus characterized in that one of the guide protrusions of the linear guide is positioned correspondingly between the pair of drive coils.

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