JP2010204613A - Lens barrel and optical apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel and an optical apparatus having the same, reducing movement noise (zoom noise) when a lens group is moved during zooming, and enabling macro shooting at high magnification with a simple structure. <P>SOLUTION: The lens barrel is in a collapsed state, a zoom shooting state, or a macro shooting state, depending on the position in an optical axis direction of a movable barrel. In the zoom shooting state, the movable barrel is immovable in the optical axis direction, and the lens group is driven relative to the movable barrel in the optical axis direction by a first drive source. In the collapsed state and the macro shooting state, the movable barrel is driven in the optical axis direction by rotating a cam ring around the optical axis by a second drive source. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lens barrel and an optical apparatus using the same, and is suitable for a still camera, a digital still camera, a video camera, a TV camera, and the like.

  2. Description of the Related Art Conventionally, in an optical apparatus such as a digital camera, a part of a lens barrel from a camera main body (imaging device main body) is taken out when taking a picture. When carrying without taking pictures (when not taking pictures), a so-called collapsible lens barrel is used in which a part of the lens barrel is housed in the camera body to shorten the overall length and improve portability. Yes. Also, many lens barrels are provided with a zoom mechanism (moving mechanism) for moving a plurality of moving lens frames. Furthermore, a macro mechanism is provided that enables macro photography that enables photographing at a closer distance than the closest distance that can be normally photographed.

  Conventionally, a lens barrel having a zoom mechanism using an inner cam groove provided in a cam ring, a guide groove (or straight advance groove) provided in a fixed lens barrel, and a cam follower provided in a moving lens holding frame is provided. Known (Patent Document 1). In this lens barrel, the plurality of movable lens holding frames are moved in the optical axis direction by rotating the cam ring to change the focal length (zoom position). A cam groove is formed on the inner peripheral surface of the cam ring, and a plurality of moving lens holding frames move along the cam locus of the cam groove. Of these, one moving lens holding frame has a guide groove and a cam groove provided on a fixed guide tube (fixed member) provided with a cam follower provided on the outer peripheral surface of the moving tube integrally coupled with the moving lens holding frame. Engage and move in the direction of the optical axis. Similarly, the other moving lens holding frame is moved in the optical axis direction by a cam follower provided on the moving lens holding frame engaging with a guide groove and a cam groove provided on the guide tube. The cam ring is fitted to the outer peripheral surface of the guide tube and is rotatable about the optical axis. A gear is formed on the cam ring and is connected to the output gear of the actuator. Therefore, when the actuator is driven, the cam ring rotates via the output gear, and the moving lens holding frame, the moving cylinder, and the other moving lens holding frame move to perform zooming. Then, it further moves to the retracted state (stored state) position.

  On the other hand, as a macro mechanism system in the zoom lens, there is a focus extension macro system in which the shortest shooting distance is shortened to make a macro area. In addition, there is known a macro system for moving a plurality of lens groups to obtain a high magnification by moving a plurality of lens groups.

JP 2002-350706 A

  In the conventional lens barrel, the moving lens frame is moved by rotating the cam ring during zooming. When the cam ring is moved via the output gear of the actuator, the zoom sound becomes high, and this method is not suitable for the noise reduction required for photographing. Specifically, since the actuator that is the driving source of the cam ring is composed of a plurality of reduction gear trains, a large gear noise is generated. Furthermore, a large amount of rotational sliding noise between the cam ring and the fixed guide tube is generated, and the zoom sound tends to increase. In particular, recent digital still cameras have a moving image shooting function as well as video cameras, and there is a strong demand for quiet zoom sound. Further, recent cameras (optical devices) are required to be able to perform macro shooting at a high magnification. From the viewpoint of such macro photography, the above-described focus extension macro method has a drawback that a sufficiently high magnification cannot be obtained. For this reason, there is a demand for a multiple lens group moving system in which a plurality of moving lens frames move in macro photography. In the multiple lens moving method, the plurality of moving lens frames must be moved, so that the lens barrel tends to be complicated.

  It is an object of the present invention to provide a lens barrel that has a small moving sound (zoom sound) when the moving lens frame moves during zooming and that can perform macro photography at a high magnification with a simple configuration, and an optical apparatus having the same. .

  In the lens barrel of the present invention, the cam ring is driven by a drive source provided on a fixed member, so that the movable barrel holding the movable lens frames movably moves forward and backward in the optical axis direction, retracted, zoom photography In the lens barrel configured to be in the state and the macro photographing state, at the time of zoom photographing, the movable tube is not moved, and the plurality of movable lens frames are moved in the optical axis direction by a driving source provided on the movable tube, and macro photographing is performed. The cam ring is driven at the time of setting.

  According to the present invention, it is possible to obtain a lens barrel that can generate a high-magnification macro photography with a simple configuration and an optical apparatus having the lens barrel that have a small moving sound (zoom sound) when the moving lens frame moves during zooming.

It is a disassembled perspective view explaining the structure of the lens barrel which is embodiment of this invention. It is sectional drawing explaining the retracted state of the lens-barrel of FIG. It is sectional drawing explaining the wide state of the lens-barrel of FIG. It is sectional drawing explaining the middle state of the lens-barrel of FIG. It is sectional drawing explaining the tele state of the lens-barrel of FIG. FIG. 2 is an assembled perspective view illustrating a configuration of a front unit in which a moving cylinder 7 of the lens barrel in FIG. 1 is partially cut away. FIG. 2 is an assembled perspective view illustrating a configuration of a front unit in which a moving cylinder 7 of the lens barrel in FIG. 1 is partially cut away. FIG. 2 is a cam groove development view of the cam ring 6 of FIG. 1. FIG. 2 is a cam groove development view of the cylindrical cam ring 24 of FIG. 1. It is a flowchart figure of the telemacro setting in this embodiment. It is sectional drawing explaining the telemacro state of the lens-barrel of this embodiment.

  The lens barrel of the present invention will be described as follows using the reference numerals of the members described later. In the lens barrel of the present invention, the cam ring 6 is driven by a drive source 30 (second drive source), whereby a plurality of moving lens frames 9 and 17, a first moving lens group 2, and a second moving lens group 3. The movable cylinder 7 that holds the (lens group) so as to be movable in the optical axis direction advances and retreats in the optical axis direction. Depending on the position of the moving cylinder 7 in the optical axis direction, the retracted state, the zoom photographing state, and the macro photographing state are set. In the zoom photographing state, the movable cylinder 7 does not move in the optical axis direction, and the lens group is provided relative to the movable cylinder 7 by the drive source 25 (first drive source) provided integrally with the movable cylinder 7. Zooming is performed by being moved to. When the macro shooting state is set, the cam ring 6 is rotated around the optical axis, and the moving cylinder 7 is moved in the optical axis direction accordingly. When the retracted state is set to the zoom photographing state or when the zoom photographing state is set to the retracted state, the driving source 30 is driven to rotate the cam ring 6 to move the movable cylinder 7 forward in the optical axis direction. Is set. Alternatively, the driving source 30 is driven to rotate the cam ring 6 to move the moving cylinder 7 forward in the optical axis direction, and the driving source 25 provided integrally with the moving cylinder 7 is driven to move the lens group. Is set.

[Example]
1 to 11 are explanatory diagrams of a lens barrel for a digital still camera according to an embodiment of the present invention. FIG. 1 is an exploded view of a lens barrel. FIG. 2 is an explanatory diagram of the retracted state of the lens barrel. 3 is a wide zoom state (wide angle) of the zoom lens provided in the lens barrel, FIG. 4 is a middle zoom state of the lens barrel, and FIG. 5 is an explanatory diagram of a tele zoom state (telephoto) of the lens state. FIG. 7 is an assembled perspective view of the front unit in which a part of the outer wall of the moving cylinder, which will be described later, is cut out and some parts are omitted. FIG. 8 is an explanatory view of the cam groove of the cam ring. FIG. 9 is an explanatory view of the cam groove of the cylindrical cam. FIG. 10 is a flowchart regarding macro photography. FIG. 11 is an explanatory diagram of a lens barrel during macro photography.

  In these drawings, reference numeral 1 denotes a CCD holder (fixing member) that supports the entire lens barrel and has a CCD mounting portion 1a. Reference numeral 2 denotes a first moving lens group including a first lens 2a and a second lens 2b, 3 denotes a second moving lens group, and 4 denotes a third moving lens group. These moving lens groups 2, 3, and 4 constitute a zoom lens. Reference numeral 5 denotes a guide cylinder (fixed cylinder) fixed to the CCD holder 1. During zooming, the first moving lens group 2, the second moving lens group 3, and the third moving lens group 4 move. In the present embodiment, the third moving lens group 4 is not always necessary. Further, the movable cylinder 7 described later moves forward and backward in the direction of the optical axis with respect to the lens barrel main body portion of the guide cylinder 5 fixed to the CCD holder 1 to enter the retracted state or retractable state. . During zooming from the zoom position at the wide-angle end to the zoom position at the telephoto end, the first moving lens frame 2 moves along a locus that is convex toward the image side. The second moving lens group 3 moves to the object side. The third moving lens group 4 moves to the object side or the image side.

  A cam ring 6 is rotatably fitted on the outer periphery of the guide tube 5. The cam ring 6 is prevented from moving in the optical axis direction by the inner rib 6a being bayonet-coupled to the abutment portion 5a and the projection portion 5b provided in the guide tube 5. Reference numeral 30 denotes a stepping motor (drive source) in which a reduction mechanism (reduction gear train) is built in the BOX. The stepping motor 30 is attached to a CCD holder (fixed member) 1 fixed to the guide cylinder 5, and the output gear is engaged with the large gear portion 6 d of the cam ring 6. A photo interrupter 34 is provided on the CCD holder, and detects the absolute rotation position of the cam ring 6 by a light shielding wall 6e provided integrally with the cam ring 6. Based on the detected signal, the stepping motor 30 is driven and controlled by a drive signal transmitted from a control circuit (not shown) via a flexible printed board (not shown).

  Reference numeral 8 denotes a 2a lens frame that holds the first lens 2a, and 9 denotes a first moving lens frame that holds the second lens 2b. The 2a lens frame 8 is finely adjusted with respect to the first moving lens frame 9 when the lens is completed. Specifically, the 2a lens frame 8 is set so as to be decentered in a direction orthogonal to the optical axis, and performs decentering adjustment so as to obtain the best optical state. After the adjustment, the 2a lens frame 8 and the first moving lens frame 9 are joined by adhesion or the like. Reference numeral 7 denotes a guide member (moving cylinder), which will be described later, for moving the first moving lens group 2 and the second moving lens group 3 during zooming photography from the wide-angle end to the telephoto end, and includes an actuator (drive source) 25 and the like. Are provided integrally. A tapered roller (cam follower) 10 that fits in a guide groove 5 c formed in the guide cylinder 5 and engages with a cam groove 6 b formed in the inner periphery of the cam ring 6 is provided on the outer periphery of the movable cylinder 7. It is fixed.

  Reference numeral 11 denotes a decorative ring fixed to the first moving lens frame 9, and 12 denotes a dust entry prevention sheet wound around the outer periphery of the decorative ring 11. Reference numerals 13, 14, and 15 denote guide bars (guide members) that extend in the optical axis direction or substantially in the optical axis direction. Each of these guide bars 13, 14, and 15 is fixed to one end support portions 7 b and 7 c provided in the moving cylinder 7 at the front end in the optical axis direction, and the rear end is integrated with the rear end of the moving cylinder 7. It is fixed to a metal plate (fixing member) 16 coupled to. The metal plate 16 is positioned by a positioning dowel 17a provided at the rear end of the movable cylinder 7. The sleeve portion 9 a of the first moving lens frame 9 is engaged with the guide bar 14, and the U groove portion 9 b is engaged with the guide bar 15. Thus, the first moving lens frame 9 (first moving lens group 2) is guided to move in the optical axis direction by fitting the sleeve portion 9a and the guide bar 14, and the U groove portion 9b and the guide bar 15 are engaged. Therefore, the rotation around the guide bar 14 is prevented.

  Reference numeral 17 denotes a second moving lens frame that holds the second moving lens 3. The sleeve portion 17 a provided on the second moving lens frame 17 is fitted to the guide bar 13, and the U groove portion 17 b is engaged to the guide bar 15. Thus, the second moving lens frame 17 is guided to move in the optical axis direction by fitting the sleeve portion 17a and the guide bar 13, and the guide bar 13 is centered by the engagement of the U groove portion 17b and the guide bar 15. Rotation is prevented. Reference numeral 24 denotes a cylindrical cam ring (cylindrical cam cylinder) that moves the first moving lens frame 9 (first moving lens group 2) and the second moving lens frame 17 (second moving lens group 3) in the optical axis direction during photographing. . The cylindrical cam ring 24 is fitted and held in a bearing portion 7 a provided in the movable cylinder 7 so that its front end portion is rotatably fitted to the metal plate 16. On the outer peripheral surface of the cylindrical cam ring 24, a moving cam locus 24 a for moving the first moving lens frame 9 that holds the first moving lens group 2 is formed, and the moving cam locus 24 a is the first moving lens frame 9. Is engaged with a taper pin (cam follower) 9c provided integrally therewith. Reference numeral 24 b denotes a moving cam locus for movement of the second moving lens 3 provided on the outer peripheral surface of the cylindrical cam ring 24, which engages with a taper pin (cam follower) 17 c provided integrally with the second moving lens frame 17. ing.

  Reference numeral 25 denotes a stepping motor (first drive source) that rotates the cylindrical cam ring 24, that is, moves the first moving lens group 2 and the second moving lens 3 in the optical axis direction to perform zooming. In the stepping motor 25, a gear portion 24 c provided on the outer peripheral surface of the cylindrical cam ring 24 and a pulley gear portion 25 a at the tip of the stepping motor 25 are coupled by a timing belt 31. The stepping motor 25 is attached to a flange portion 7 d provided on the movable cylinder 7 and is integrated with the movable cylinder 7. Accordingly, the stepping motor 25, the cylindrical cam ring 24, and the timing belt 31 move in the optical axis direction integrally with the moving cylinder 7. The stepping motor 25 is driven and controlled by a driving signal transmitted from a flexible printed board (not shown).

  Reference numeral 32 denotes a photo interrupter that detects the absolute positions of the first moving lens group 2 and the second moving lens group 3 by a light shielding wall 7e provided integrally with the moving cylinder 7, and is a second moving lens frame. 17 is integrally fixed. An aperture device 22 is attached to the second moving lens frame 17 and moves integrally with the second moving lens frame 17 in the optical axis direction. Reference numeral 23 denotes an aperture motor that drives the aperture device 22, and a drive signal is transmitted from a flexible printed circuit board (not shown) and is driven and controlled.

  As described above, one flexible printed circuit board (not shown) in which the stepping motor 25, the diaphragm motor 23, and the photo interrupter 32 are connected is configured as one front unit. Reference numerals 19 and 20 denote guide bars extending in the optical axis direction. Each of the guide bars 19 and 20 has a rear end portion in the optical axis direction fixed to one end support portions 1 b and 1 c provided in the CCD holder 1, and a front end portion integrally coupled to the front end portion of the CCD holder 1. It is fixed to the metal plate 21. The metal plate 21 is positioned by a positioning dowel 1d provided at the front end of the CCD holder 1.

  A third moving lens frame 18 holds the third moving lens group 4. The sleeve portion 18 a provided on the third moving lens frame 18 is fitted to the guide bar 19, and the U groove portion 18 b is engaged to the guide bar 20. Accordingly, the third moving lens frame 18 is guided to move in the optical axis direction by fitting the sleeve portion 18a and the guide bar 19, and the guide bar 19 is centered by the engagement of the U groove portion 18b and the guide bar 20. Rotation is prevented. A rack 26 is attached to the third moving lens frame 18. Reference numeral 27 denotes a stepping motor for moving the third moving lens frame 18 in the optical axis direction. The rack 26 meshes with a feed screw 28 provided as an output shaft thereof. Therefore, when the stepping motor 27 rotates, the third moving lens frame 18 is driven in the optical axis direction by the meshing action of the feed screw 28 and the rack 26. A motor holding member 29 for holding the feed screw 28 is fixed to the CCD holder 1 from the optical axis direction by a motor fixing portion 29a disposed in the vicinity of the driving portion of the stepping motor 27. The stepping motor 27 receives a driving signal from a flexible printed circuit board (not shown), detects the absolute position by the photo interrupter 33, and is driven and controlled. As described above, it can be configured as one rear unit together with the flexible printed circuit board for the stepping motor 27 (not shown).

  Next, the operation of the lens barrel configured as described above will be described. A drive signal is transmitted to the stepping motor 30 in order to change to the wide state of FIG. 3 in order to start the photographing operation from the retracted (stored) state (non-photographing state) of FIG. Then, the stepping motor 30 rotates and the output of the stepping motor 30 is transmitted to the large gear portion 6 a of the cam ring 6. The movable cylinder 7 is prevented from rotating by the engagement of the tapered roller 10 that engages with the cam groove 6 b of the cam ring 6 and the guide groove 5 c provided in the guide cylinder 5. For this reason, the movable cylinder 7 is driven in the optical axis direction by the engagement action between the tapered roller 10 and the cam groove 6 b of the cam ring 6 when the cam ring 6 rotates. Thereby, the movable cylinder 7 shifts from the retracted state of FIG. 2 to the photographing state (wide state) of FIG.

  FIG. 8 is a development view of the cam groove 6 b of the cam ring 6. 6c in the figure, the position of the tapered roller 10 that engages with the cam groove 6b of the cam ring 6 corresponds to the retracted position of FIG. 6d, the position of the taper roller 10 is the shooting state in the wide, middle, and tele states of FIGS. 3, 4, and 5, respectively. Therefore, when the retracted state is changed to the wide state, the stepping motor 30 is driven until the photo interrupter 34 is switched, and a predetermined number of pulses are sent from the switching detection position. Then, by driving the taper roller 10 to the position 6d in FIG. 8, the wide state in FIG. 3 is obtained. Reference numeral 6e in FIG. 8 denotes a position at which the movable cylinder 7 is displaced by the rotation of the cam ring 6 during macro photography to be described later. The cam groove 6b in FIG. 8 indicates that macro photography is performed by moving the movable cylinder 6 from an arbitrary zoom position (6d). FIG. 9 is a development view of the cam grooves 24 a and 24 b of the cylindrical cam ring 24 provided in the movable cylinder 7.

  In the retracted state of FIG. 2, the taper pin 9c provided on the first moving lens frame 9 is engaged at the position 24e of the cam groove 24a for the first moving lens frame 9 of FIG. The taper pin 17c of the second moving lens frame 17 is engaged at the position 24g of the cam groove 24b for the second moving lens frame 17 in FIG. The position 24e of the cam groove 24a and the position 24g of the cam groove 24b are used cam positions in the tele state shown in FIG. 5, and the first moving lens group 2 and the second moving lens group 3 are closest to each other in the optical axis direction. The retracted state is formed. Therefore, when the retracted state in FIG. 2 is changed to the wide state in FIG. 3, the stepping motor 25 disposed integrally with the moving cylinder 7 is removed from the photo interrupter 32 integrally fixed to the second moving lens frame 17. It is driven until the output signal is switched. Then, a predetermined number of pulses are sent from the switching detection position 24h, and the movable cylinder 7 is driven to the positions 24d and 24f of the cam grooves 24a and 24b when the taper pins 9c and 17c are in the wide state.

  At this time, the first moving lens frame 9 is guided and engaged by the guide bars 14 and 15 by the engagement action between the cam groove 24a provided on the outer peripheral surface of the cylindrical cam ring 24 and the taper pin (cam follower) 9c. Driven in the optical axis direction. In addition, the second moving lens frame 17 is integrally formed with the second moving frame 17 of the cam groove portion 24b of the cylindrical cam ring 24 while being guided and prevented from rotation by the guide bars 13 and 15, and a taper pin (cam follower) 17c. Driven in the optical axis direction by the engaging action. At the same time, a drive signal is transmitted to the stepping motor (drive source) 27, the absolute position is detected by the photo interrupter 33, and the third moving lens frame 18 is moved to the wide state of FIG.

  The movement when changing from the wide state of FIG. 3 to the retracted state of FIG. 2 is opposite to the movement from the retracted state to the wide state. In order to change from the wide state to the middle and tele states shown in FIGS. 4 and 5, respectively, the stepping motor 30 is not driven, that is, the cam ring 6 is not driven. Then, the stepping motor 25 is driven to move the first moving lens frame 9 and the second moving lens frame 17, and further, the stepping motor 27 is driven to move the third moving lens frame 18 to the middle and tele states. Drive.

  In this embodiment, the stepping motors 25 and 27 are driven when the retracted state is changed to the wide state and during zooming. In the lens barrel of this embodiment, zooming during shooting from the wide-angle end (wide end) to the telephoto end (tele end) is performed by the moving lens groups 2, 3, The moving lens frames 9 and 17 are moved relative to the moving cylinder in the optical axis direction. For this reason, compared with the case where it drives with the reduction gear train of the stepping motor 30, noise reduction becomes easy. Further, since the actuator 25 and the cylindrical cam ring 24 are provided in the movable cylinder 7, it is easy to reduce the noise without increasing the size without providing a special bulge in the external portion.

  Next, a description will be given with reference to the flowchart of FIG. In this embodiment, a telemacro that performs macro shooting at the telephoto end is used. However, the macro photography of the present embodiment is not limited to the telemacro and can be performed at any zoom position. Various operations here are performed by a CPU provided in the lens barrel or the camera body.

  When the macro SW is turned on at the camera side (not shown) in step # 2 of FIG. 10, the current focal length is determined in step # 3. When the zoom position of the zoom lens in the lens group is determined in step # 3 by the telephoto end position and the determination means in the CPU on the camera body side, the process proceeds to step # 4. In step # 4, the stepping motor 30 is driven to rotate the cam ring 6 and move the tapered roller 10 fixed to the moving cylinder 7 from the cam groove 6b in FIG. 8 to the position 6e. Thus, the first and second moving lens frames 9 and 17 are moved to the object side. The number of pulses supplied to the stepping motor 30 is driven by a number of pulses stored in advance by a CPU (not shown). At the same time, the stepping motor 27 is also driven to move the third moving lens frame 18. At this time, the number of pulses supplied to the stepping motor 27 from the known switching position of the photo interrupter 33 is counted by a CPU (not shown) or the like. Accordingly, the stepping motor 27 receives a drive signal from a flexible printed circuit board (not shown) and moves the third moving lens frame 18 to a predetermined position. Thus, the telemacro shooting state shown in FIG. 11 is obtained.

  Next, when it is determined at step # 3 that the non-telephoto zoom position is determined by the determination means in the CPU, the stepping motor 30 and the stepping motor 27 are driven in the same manner as in step # 4 described above. Further, the stepping motor 25 is also driven until the photo interrupter 32 is switched, a predetermined number of pulses are sent from the switching detection position 24h, and the taper pins 9c, 17c are inserted into the cam grooves 24a, 24b in the tele end state of FIG. Drive to positions 24e, 24g. After the tele end, tele macro photography is performed. Macro photography is possible even if the movable cylinder 7 is moved from any zoom position.

  As described above, in this embodiment, the entire lens group shown in FIG. 11 is extended from the respective focal lengths such as the wide, middle, and tele zoom positions in FIGS. 3, 4, and 5, and macro photography is performed. Is going. As a result, a sufficiently high magnification can be obtained as compared with the focus extension macro method despite a simple configuration. Further, although the telemacro setting has been described in the present embodiment, it can be set to a wide macro as in the telemacro. In this embodiment, the lens barrel used in the digital still camera has been described. However, the present invention can be similarly applied to a lens barrel of another optical device such as a video camera or a film camera.

  As described above, according to the present embodiment, the lens group in the moving cylinder is moved using the actuator 25 and the cylindrical cam ring 24 for zooming at the time of shooting from the wide-angle end to the telephoto end. Thereby, compared with the case where it drives with the reduction gear train of the stepping motor 30, a noise reduction becomes easy. In addition, since the actuator 25 and the cylindrical cam ring 24 are integrally provided in the movable cylinder 7, it is easy to reduce the noise without increasing the size without providing a special ledge on the outer appearance. Furthermore, in the macro photographing state, the entire lens group is extended, and it is easy to obtain a sufficiently high magnification as compared with the focus extension macro method despite the simple structure. Further, even with a configuration using the retractable method, a lens group moving mechanism including an actuator similar to that of a video camera lens can be provided, so that the noise can be reduced and the actuator is provided in the moving cylinder. The cylinder does not increase in size. Also, as an optical device using a lens barrel, when setting the macro shooting setting state from the camera body etc., it recognizes the current focal length and determines whether or not to move a drive source different from the cam ring drive source. Judgment means is provided. Thereby, the telephoto end point (tele-macro) or the wide-angle end point (wide macro) of the zoom area can be obtained.

DESCRIPTION OF SYMBOLS 1 CCD holder 2 1st moving lens group 3 2nd moving lens 4 3rd moving lens 5 Guide cylinder 6 Cam ring 7 Moving cylinder 9 1st moving lens frame 17 2nd moving lens frame 18 3rd moving lens frame 24 Cylindrical cam ring 25 Stepping motor (for driving cylindrical cam ring 24)
27 Stepping motor (for driving the third lens moving frame)
30 Stepping motor (for driving cam ring 6)

Claims (4)

A lens group;
A moving cylinder that holds the lens group movably in the optical axis direction;
A first drive source provided in the movable cylinder and driving the lens group in the optical axis direction relative to the movable cylinder;
A cam ring that engages with the moving cylinder and moves the moving cylinder in the optical axis direction by rotating around the optical axis;
A second drive source for rotating the cam ring around the optical axis,
The moving cylinder is in a retracted state, a zoom shooting state, or a macro shooting state depending on the position of the moving tube in the optical axis direction,
In the zoom photographing state, the movable cylinder is stationary in the optical axis direction, and zooming is performed by driving the lens group in the optical axis direction relative to the movable cylinder by the first drive source,
When the macro shooting state is set from the retracted state or the zoom shooting state, the movable cylinder is driven in the optical axis direction by rotating the cam ring around the optical axis by the second driving source. A lens barrel that is set by causing the lens barrel to be set.   When the zooming state is set from the retracted state or when the zoom state is set to the retracted state, the cam ring is rotated around the optical axis by the second driving source to move the movable cylinder to the optical axis. Or the cam ring is rotated around the optical axis by the second drive source to move the movable cylinder in the optical axis direction, and the lens group is moved by the first drive source. The lens barrel according to claim 1, wherein the lens barrel is set by being driven in the optical axis direction relative to the tube.   An optical apparatus comprising the lens barrel according to claim 1.   When the telephoto macro in the macro photographing state is set from the retracted state or the zoom photographing state, it is determined whether or not the first driving source is driven based on the focal length of the zoom lens in the lens group. The optical apparatus according to claim 3, further comprising a determination unit.