JP4899845B2 - Lens barrel, lens barrel operating method, and camera system - Google Patents

Description

  The present invention relates to a lens barrel capable of performing a high-magnification zoom operation, a lens barrel operating method, and a camera system.

For example, Patent Document 1 discloses a configuration example of a lens barrel that employs an inner focus method and is capable of a high-magnification zoom operation.
JP 7-333482 A

  However, although the lens barrel disclosed in the above publication is referred to as high magnification, each lens in a lens barrel having a zoom magnification exceeding 10 times required for a recent lens barrel There was a problem that the amount of movement of the group was too large to adopt a similar configuration.

  Further, in recent high-power zoom lens barrels, as described in the above-mentioned publications, the amount of focusing lens that has been moved out along with the change in focal length is corrected.

  However, if the design of the focus cam that corrects the extension amount of the focusing lens is prioritized, the slope of the cam that operates during the zoom operation becomes too steep and zoom driving using the cam is realized. There was a problem of disappearing.

  An object of the present invention is to provide a lens barrel, a lens barrel operating method, and a camera system that can smoothly perform a zoom operation and a focus operation even at a high magnification.

To achieve the above object, the invention of claim 1 includes a first moving cylinder having a first cam groove defined corresponding to a focusing operation and holding an optical system used for the focusing operation. A second moving cylinder having a second cam groove , which is provided in association with the first moving cylinder, and a third cam groove defined corresponding to a zooming operation, and a fixed cylinder A third movable cylinder movable with respect to the first cam groove, the second cam groove, the driving cam pin that engages with the third cam groove, and the driving cam pin, A holding member arranged to be rotatable around the optical axis and movable in the optical axis direction with respect to the first moving cylinder, the second moving cylinder, and the third moving cylinder, The movable cylinder can be rotated at a first angle corresponding to the rotation of the zoom operation ring, and the first angle is A second angle whose serial drive cam pin is rotated along the second cam groove, and wherein the driving cam pin corresponds to the sum of the third angle that rotates along the third cam groove This is a lens barrel.

A second aspect of the present invention, that a lens barrel according to claim 1, vibration reduction system to eliminate the influence of vibration of the lens barrel to the image plane side of the optical system are provided This is a lens barrel characterized by the following.

A third aspect of the present invention, a lens barrel according to claim 1, by combining with the second cam groove and the third cam groove, characterized in that the zooming operation is carried out It is a lens barrel.

The invention according to claim 4, a lens barrel according to claim 1, wherein the second cam groove, during zooming operation, at least a part of the object than the optical system of the second cam groove The lens barrel is characterized in that it may be located on the side.

According to a fifth aspect of the present invention, in the lens barrel according to any one of the first to fourth aspects, during the zooming operation, the driving cam pin includes the second cam groove and the third cam. The optical system is moved in the optical axis direction according to the movement of the driving cam pin, and the first movable cylinder is rotated with respect to the driving cam pin during the focusing operation. By moving the optical system, the lens barrel moves in the optical axis direction.

A sixth aspect of the present invention is the lens barrel according to any one of the first to fifth aspects, wherein the first movable cylinder and the third movable cylinder intersect with each other in an axial direction. In the lens barrel, the distance between the first moving cylinder and the third moving cylinder is shorter than the length of the driving cam pin.

A seventh aspect of the present invention is the lens barrel according to any one of the first to sixth aspects, wherein the second movable barrel includes the first movable barrel and the third movable barrel. The lens barrel is provided between the two.

The invention according to an eighth aspect is the lens barrel according to any one of the first to seventh aspects, wherein the zooming operation is performed by combining the second cam groove and the third cam groove. A lens barrel characterized by being performed.

A ninth aspect of the invention is the lens barrel according to any one of the first to eighth aspects, wherein the second movable cylinder moves in response to a zooming operation. The lens barrel is characterized in that the first movable barrel is held as possible.

A tenth aspect of the present invention is the lens barrel according to any one of the first to ninth aspects, wherein the first movable cylinder is moved along the first cam groove during the focusing operation. The lens barrel moves relative to the second movable barrel by rotating with respect to the driving cam pin.

The invention according to an eleventh aspect is the lens barrel according to any one of the first to tenth aspects, wherein the driving cam pin is formed on the outer periphery of the holding member in a direction intersecting the optical axis direction. This is a lens barrel.

According to a twelfth aspect of the present invention, the first cam groove formed in the first moving cylinder holding the optical system used for the focusing operation is engaged with the driving cam pin to move the optical system. The second cam groove provided in the second movable cylinder provided in association with the movable cylinder is engaged with the driving cam pin, and is provided in the third movable cylinder movable with respect to the fixed cylinder. The third cam groove is engaged with the driving cam pin, and the driving cam pin is moved by a moving amount determined by a combination of the second cam groove and the third cam groove, and the driving cam pin is moved. The optical system is moved in the optical axis direction according to the movement of the cam pin, the position of the optical system is determined during zoom operation , and the first moving cylinder is rotated with respect to the driving cam pin during focusing drive. moving the optical system in the optical axis direction by An operation method of a lens barrel, wherein the door.

The invention of claim 13 is a method of operating a lens barrel according to claim 12, lenses and removing the influence of vibration of the lens barrel in the image plane side of the optical system This is a method of operating the lens barrel.

The invention of claim 14, characterized in that a has been operating method of a lens barrel according to claim 13, by combining with the second cam groove and the third cam groove, carries out the zoom operation This is a method of operating the lens barrel.

A fifteenth aspect of the invention is the lens barrel operating method according to the fourteenth aspect , wherein at least a part of the second cam is positioned closer to the object side than the optical system during a zooming operation. This is a method of operating the lens barrel.

A sixteenth aspect of the present invention is the lens barrel operating method according to any one of the twelfth to fifteenth aspects, wherein the driving cam pin includes the second cam groove and the second cam groove during a zooming operation. The first movement is performed with respect to the driving cam pin during a focusing operation by moving the optical system in the optical axis direction according to the movement of the driving cam pin. The lens barrel operating method is characterized in that the optical system is moved in the optical axis direction by rotating the tube.

A seventeenth aspect of the invention is the lens barrel operating method according to any one of the twelfth to sixteenth aspects, which intersects the axial directions of the first moving cylinder and the third moving cylinder. In the direction, the distance between the first moving cylinder and the third moving cylinder is shorter than the length of the driving cam pin.

The invention according to claim 18 is the lens barrel operating method according to any one of claims 12 to 17, wherein the second moving cylinder includes the first moving cylinder and the third moving cylinder. A lens barrel operating method is provided between the movable barrel and the movable barrel.

The invention of claim 19 is the lens barrel operating method according to any one of claims 12 to 18, wherein the second cam groove and the third cam groove are combined to provide the lens barrel operation method. A method for operating a lens barrel, wherein a zooming operation is performed.

A twentieth aspect of the invention is the lens barrel operating method according to any one of the twelfth to nineteenth aspects, wherein the second moving barrel corresponds to a zooming operation. The lens barrel operating method is characterized in that the first moving cylinder is held so that the cylinder can move.

A twenty-first aspect of the invention is the lens barrel operating method according to any one of the twelfth to twentieth aspects, wherein the first movable barrel is formed in the first cam groove during the focusing operation. The lens barrel operating method is characterized in that the lens barrel moves relative to the second moving cylinder by rotating with respect to the driving cam pin.

A twenty-second aspect of the invention is the lens barrel operating method according to any one of the twelfth to twenty-first aspects, wherein the driving cam pin intersects the optical axis direction on the outer periphery of the holding member. The lens barrel operating method is characterized in that it is formed as follows.

According to a twenty-third aspect of the present invention, in the lens barrel according to any one of the first to eleventh aspects, the second cam groove and / or the third cam groove has a non-linear cam shape. There is a lens barrel characterized by being.
According to a twenty-fourth aspect of the present invention, in the lens barrel according to any one of the first to eleventh and twenty- third aspects, the first cam groove , the second cam groove, and the third A plurality of cam grooves and cam pins having the same shape are provided, and a cam barrel connecting member that integrally connects the plurality of cam pins is provided.
A twenty-fifth aspect of the present invention is the lens barrel according to the twenty- fourth aspect, wherein the lens barrel is a cylindrical member that does not move during the first operation and the second operation, and is parallel to the optical axis direction of the photographing optical system. And a fixed cylinder having a fixed cylinder cam, and the drive cylinder has a drive cylinder straight groove parallel to the optical axis and is rotatable with respect to the guide cylinder, and A cylindrical member that is provided so as to be linearly moved integrally with the guide tube, is movably fitted to the inner periphery of the fixed tube, and moves straight while rotating during the first operation, A cam cylinder having a cam cylinder groove formed in a groove or cam groove shape orthogonal to the drive cylinder, and having a cam cylinder pin that engages with the drive cylinder rectilinear groove and engages with the fixed cylinder cam, and the guide The lens barrel includes a guide tube pin that engages with the cam tube groove. A.
According to a twenty-sixth aspect of the present invention, in the lens barrel according to the twenty-fifth aspect , the outer diameter of the cam pin connecting member is smaller than the inner diameter of the fixed barrel.

According to a twenty-seventh aspect of the present invention, the lens barrel according to any one of the first to eleventh aspects and the twenty-third to twenty-sixth aspects of the present invention, and photographing that captures a subject image obtained by the lens barrel A camera system.

  According to the present invention, it is possible to provide a lens barrel, a lens barrel operating method, and a camera system that can smoothly perform a zoom operation and a focus operation even at a high magnification.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
Here, FIG. 1 is a longitudinal sectional view showing a wide-angle state of a lens barrel according to an embodiment of the present invention.
2 is a longitudinal sectional view showing the wide-angle state of the lens barrel shown in FIG. 1 by a longitudinal section different from that in FIG.
3 is a cross-sectional view showing a telephoto state of the lens barrel shown in FIG.
FIG. 4 is a perspective view showing a telephoto state in the fixed barrel, the zoom drive barrel and the first group barrel in the lens barrel shown in FIG.
FIG. 5 is an exploded perspective view of the zoom drive cylinder, zoom guide cylinder, and drive pin holding member shown in FIG.
FIG. 6 is a perspective view of the zoom drive cylinder and zoom guide cylinder shown in FIG.
FIG. 7 is a perspective view of the zoom drive cylinder shown in FIG.
FIG. 8 is a perspective view of the zoom guide tube shown in FIG.
FIG. 9 is a perspective view of the focusing lens frame shown in FIGS.
FIG. 10 is a perspective view of the drive pin holding member shown in FIGS.
FIG. 11 is a perspective view of the fixed cylinder shown in FIGS.
FIG. 12 is a perspective view showing the cam cylinder located inside the fixed cylinder shown in FIG. 11 and the inside thereof.
FIG. 13 is a perspective view of the cam cylinder alone shown in FIG.
FIG. 14 is a diagram of the fixed cylinder, the zoom guide cylinder, the zoom drive cylinder, the cam cylinder, the focusing lens frame, and the first group cylinder in the wide-angle end state as viewed from the outer peripheral side.
FIG. 15 is a diagram of the fixed tube, the zoom guide tube, the zoom drive tube, the cam tube, the focusing lens frame, and the first group tube in the telephoto end state as viewed from the outer peripheral side.
16A is a development view in which the main part of FIG. 14 is extracted, and FIG. 16B is a development view in which the main part of FIG. 15 is extracted.
17A is a schematic diagram in which three cam grooves and drive pins are extracted in FIG. 16A, and FIG. 17B is a schematic diagram in which three cam grooves and drive pins are extracted in FIG. 16B. FIG.
FIG. 18A is a diagram showing the trajectory of each lens group moving from the zooming wide-angle end (Wide) to the zooming telephoto end determined in the optical design, and FIG. 18B shows the actual cam groove shape after correction. FIG. 6 is a diagram illustrating a trajectory in which each lens group moves from a zooming wide-angle end (Wide) to a zooming telephoto end (Tele).
FIG. 19 is a diagram illustrating the amount of movement of the focusing lens frame at each zooming position from the zooming wide-angle end to the zooming telephoto end.
FIG. 20 is a graph showing the relationship between the amount of movement of the focusing lens frame and the rotation angle of the focus operation ring at each zooming position.
FIG. 21 is a graph showing the amount of movement of the focusing lens frame at each zooming position as a single curve with the origin shifted.
FIG. 22 is a graph showing the relationship between the focal length of the lens barrel and the rotation angle of the zoom operation ring according to this embodiment.

  As shown in FIGS. 1 to 3, the lens barrel 1 in the present embodiment is formed by four lens groups of a first lens group L1, a second lens group L2, a third lens group L3, and a fourth lens group L4. The interchangeable lens has a photographing optical system that can perform an operation (zoom operation) of continuously changing a focal length.

  All of the first lens unit L1 to the fourth lens unit L4 perform linear movements independently in the optical axis direction by a zoom operation. The lens barrel 1 of the present embodiment is a so-called inner focus (inner focus type) lens barrel, and only the second lens unit L2 moves straight in the optical axis direction during the focusing operation. The second lens unit L2 corresponds to a focusing lens (focusing lens).

  The photographing optical system of the present embodiment is a lens in which the necessary extension amount of the second lens unit L2 changes according to the zooming position (focal length) of the photographing optical system during the focusing operation. The second lens unit L2 is fixed to the focus lens frame 25 shown in FIG. 9, and a focus cam groove (also referred to as a focus cam) 25a is formed in the focus lens frame 25.

  The focus cam groove 25a corrects a necessary extension amount of the second lens unit L2 that changes in accordance with the zooming position of the photographing optical system, maintains the in-focus state even when the zooming position changes, and maintains constant rotation. Correction is performed so as to cause the second lens unit L2 to be extended according to the operation amount (hereinafter also simply referred to as extension amount correction). The lens barrel 1 of the present embodiment realizes the feed amount correction.

  In order to hold the first lens unit L1 to the fourth lens unit L4 in a movable manner, the lens barrel 1 has a fixed barrel 50, a zoom operation ring 51, a zoom drive barrel 53, A zoom guide cylinder 52, a cam cylinder 24, a focus lens frame 25, a drive pin holding member 28, a focus cam pin (drive cam pin) 101, a first group cylinder 38, and the like.

  The fixed cylinder 50 is a cylindrical member that does not move with respect to the camera body (not shown) during zoom operation and focus operation, and is a fixed cylinder rectilinear groove that is a groove parallel to the optical axis direction of the photographing optical system. 50a and a fixed cylinder cam groove 50b. A lens mount 40 is fixed to the fixed cylinder 50, and the lens mount 40 is detachably attached to a camera body (not shown).

  Unless otherwise specified, in the following description, movement in a direction parallel to the optical axis X of the photographing optical system with respect to the fixed cylinder 50 is referred to as straight travel, and rotation refers to rotation around the optical axis X. Shall point to. In addition, a direction parallel to the optical axis X of the photographing optical system and moving away from the lens mount 40 is referred to as the front (object side), and a direction approaching the lens mount 40 is referred to as the rear (image plane side).

  The zoom operation ring 51 is a member that rotates by obtaining a rotational driving force when a photographer directly manually operates during a zoom operation. As shown in FIG. 3, on the inner periphery of the zoom operation ring 51, a plurality of rectilinear grooves 51a that are grooves parallel to the optical axis direction are formed at substantially equal intervals in the circumferential direction. The zoom operation ring 51 in this embodiment rotates within a range of an angle α (see FIGS. 16A, 16B, and 17A) from the wide-angle end to the telephoto end.

  As shown in FIGS. 4 to 8, the zoom drive cylinder 53 rotates with respect to the zoom guide cylinder 52 disposed on the inner peripheral side thereof, but does not move in the direction of the optical axis X, and advances linearly integrally. Thus, the zoom guide cylinder 52 is rotatably mounted on the outer periphery. As shown in FIG. 3, the zoom driving cylinder 53 has a plurality of driving force transmission pins 53 b that respectively engage with rectilinear grooves 51 a formed on the inner periphery of the zoom operation ring 51. It is formed on the outer periphery at substantially equal intervals in the circumferential direction.

  Through these drive force transmission pins 53b, the rotational drive force from the zoom operation ring 51 is transmitted to the zoom drive tube 53. According to the zoom operation ring 51, the zoom drive tube 53 is in the range of the angle α from the wide angle end to the telephoto end. Rotate.

  As shown in FIGS. 1, 4 and 7, the zoom drive cylinder 53 has a drive groove 53c parallel to the optical axis on the outer periphery on the rear end side, and in the drive groove 53c, FIG. The cam cylinder pin 100 shown in FIGS. 11 and 12 is engaged. The cam cylinder pin 100 is fixed to the cam cylinder 24 as shown in FIG.

  As shown in FIGS. 4 and 7, the zoom drive cylinder 53 has a plurality (three in the figure) of correction cam grooves 53a formed at equal intervals in the circumferential direction. Each correction cam groove 53a is formed in the range of the angle δ shown in FIG. Each of the correction cam grooves 53a is engaged with one of a plurality (three in the figure) of focus cam pins 101 formed at substantially equal intervals on the outer peripheral position of the drive pin holding member 28 shown in FIG. Each correction cam groove 53 a passes through the inner and outer periphery of the zoom drive cylinder 53.

  As shown in FIGS. 6 and 7, a plurality of cam pins 53 d are formed on the outer periphery of the zoom drive cylinder 53 in the optical axis direction front. Each cam pin 53d engages with a first group cylinder cam groove 38b formed on the inner circumference side of the first group cylinder 38 shown in FIG. The first group cylinder cam groove 38b is formed to be inclined with respect to the optical axis X direction.

  As shown in FIG. 3, a plurality of first group cylinder guide grooves 38 a are formed on the inner circumference side of the first group cylinder 38 in parallel with the optical axis X at substantially equal intervals in the circumferential direction. These first group cylinder guide grooves 38a do not penetrate the inner and outer peripheries of the first group cylinder 38, similarly to the first group cylinder cam grooves 38b. The guide pins 52b shown in FIGS. 3 and 8 are engaged with each first group tube guide groove 38a.

  When the zoom drive cylinder 53 rotates about the optical axis X with respect to the zoom guide cylinder 52, the cam pin 53d moves in the first group cylinder cam groove 38b, and the non-rotating guide pin 52b is in the first group cylinder. The guide groove 38a is moved. Therefore, the first group cylinder 38 can move forward and backward with respect to the zoom drive cylinder 53 and the zoom guide cylinder 52. The lens group L1 is fixed to the first group cylinder 38.

  As shown in FIG. 8, a plurality of zoom cam grooves 52a are formed in the zoom guide tube 52 so as to penetrate the inner and outer peripheral surfaces at equal intervals in the circumferential direction. As shown in FIGS. 17A and 17B, the zoom cam groove 52a is formed in the range of the angle γ. In the present embodiment, the sum of the angle γ of the zoom cam groove 52a and the angle δ of the correction cam groove 53a is the rotation range of the zoom operation ring 51 (zoom drive cylinder 53), from the wide-angle end to the telephoto end. Corresponds to the angle α. That is, the zoom cam groove 52a and the correction cam groove 53a define the rotation angle of the zoom drive cylinder 53 around the X axis.

  A focus cam pin 101 shown in FIG. 10 is engaged with each zoom cam groove 52a together with each correction cam groove 53a. As shown in FIGS. 2 and 8, a rear projection 52c formed thicker on the inner diameter side than the cylindrical portion of the zoom guide tube 52 on the rear end side in the optical axis X direction of the zoom guide tube 52. Are formed at a plurality of positions in the circumferential direction.

  As shown in FIG. 2, a zoom guide tube pin 102 is fixed to each rear projection 52c via a boss portion 102a. As shown in FIG. 4, the zoom guide cylinder pin 102 engages with a fixed cylinder rectilinear groove 50 a of the fixed cylinder 50 arranged on the inner peripheral side of the zoom guide cylinder 52. Therefore, the zoom guide tube 52 to which the zoom guide tube pin 102 is fixed does not rotate with respect to the fixed tube 50, but only advances straight along the fixed tube rectilinear groove 50a. The zoom drive cylinder 53 disposed on the outer periphery of the zoom guide cylinder 52 rotates around the optical axis X without moving relative to the zoom guide cylinder 52 in the optical axis X direction.

  By rotating the zoom drive cylinder 53, the cam cylinder pin 100 engaged with the drive groove 53c is moved along the fixed cylinder cam groove 50b formed so as to penetrate the fixed cylinder 50. The cam cylinder 24 to which 100 is fixed is rotated around the optical axis X and moved in the optical axis X direction. As shown in FIGS. 12 and 13, the cam barrel 24 is formed with a third group lens cam groove 24a and a fourth group lens cam groove 24b penetrating the inner and outer peripheral surfaces.

  As shown in FIG. 12, a zoom guide tube pin 102 is engaged with the third group lens cam groove 24a. The zoom guide tube pin 102 is fixed to a third lens holding tube that holds the third lens unit L3 shown in FIGS. The third lens holding cylinder that holds the third lens unit L3 is provided with a straight guide portion (not shown) to prevent rotation. Therefore, when the zoom drive cylinder 53 rotates, the cam cylinder pin 100 also rotates, and at the same time, the cam cylinder 24 is also rotated and moved in the optical axis direction, and the third lens holding cylinder that holds the third lens unit L3. Moves in the direction of the optical axis X without rotating by the action of the cam groove 24a for the third lens group.

  A cam groove 24b for the fourth lens group formed in the cam cylinder 24 is fixed to the outer periphery of the fourth lens holding cylinder that holds the fourth lens group L4 disposed on the inner periphery of the rear end side of the cam cylinder 24. The fourth group drive pin is engaged. The fourth lens holding cylinder that holds the fourth lens unit L4 is provided with a straight guide portion (not shown) to prevent rotation. Therefore, the fourth lens holding cylinder that holds the fourth lens group L4 does not rotate in the direction of the optical axis X by the action of the cam groove 24b for the fourth lens group in accordance with the rotation and straight movement of the cam cylinder 24. Move to.

  Since the fourth lens group L4 and the third lens group L3 are supported by the cam cylinder 24 disposed on the inner peripheral side of the fixed cylinder 50, the fourth lens group L4 and the third lens group L3 have a structure that is not easily tilted with respect to the optical axis. In addition, a vibration reduction system VR shown in FIG. 11 is arranged in front of the third lens holding cylinder that holds the third lens group L3 and behind the second lens group L2 (image surface side). The vibration reduction system VR removes the influence of the shake of the lens barrel 1 on the image plane side of the second lens unit L2.

  As shown in FIGS. 1 to 3, a focus lens frame 25 shown in FIG. 9 is arranged on the outer peripheral side in front of the fixed cylinder 50 and on the inner peripheral side of the zoom guide cylinder 52. As shown in FIGS. 1 to 3, the second lens unit L <b> 2 is fixed to the focusing lens frame 25. The focus lens frame 25 is formed with focus cam grooves 25a at a plurality of positions at equal intervals in the circumferential direction. Each cam groove 25 a penetrates the inner and outer peripheral surfaces of the focusing lens frame 25.

  On the rear end side of the focusing lens frame 25 in the optical axis X direction, a driving force transmitting portion 25b (FIG. 9) that receives a rotational driving force (focus driving force) selectively from a focus motor (not shown) or a focus operation ring 54. See). A pin (not shown) for transmitting the focus driving force is engaged with the driving force transmitting portion 25b. During the zoom operation, this pin (not shown) is a driving resistance applied to the focus motor and the focus operation ring 54. It does not rotate by force. That is, during the zoom operation, the second lens unit L2 held by the focusing lens frame 25 moves in the optical axis X direction without rotating around the optical axis X.

  A focus cam pin 101 formed on the outer periphery of the drive pin holding member 28 disposed on the inner peripheral side of the focus lens frame 25 is engaged with each cam groove 25 a of the focus lens frame 25. The drive pin holding member 28 is not connected to the fixed cylinder 50 at all, and is in a floating state at a position in front of the fixed cylinder 50.

  The drive pin holding member 28 is preferably ring-shaped as shown in FIG. 10, but may have other shapes. As shown in FIG. 10, since the three focus cam pins 101 are integrally provided on the drive pin holding member 28, the focus cam pins 101 are prevented from falling and the phase shift between the focus cam pins 101 is prevented. Yes.

  In addition, since the outer diameter of the drive pin holding member 28 is smaller than the inner diameter of the fixed barrel 50, the drive pin holding member 28 is provided on the fixed barrel 50 in the wide-angle end state (see FIG. 1) where the entire length of the lens barrel 1 is shortened. The focus cam pin 101 is inserted into the cutout portion 50c (see FIG. 11), and the drive pin holding member 28 can be accommodated in the fixed barrel 50, so that the lens barrel can be made smaller.

As shown in FIG. 3, each focus cam pin 101 fixed to the drive pin holding member 28 passes through each cam groove 25a of the focus lens frame 25, and the zoom guide tube 52 located on the outer peripheral side thereof. The zoom cam groove 52a engages with the correction cam groove 53a of the zoom drive cylinder 53 located on the outer periphery thereof. That is, the focus cam pin 101 is simultaneously engaged with the three cam grooves 25a, 52a, and 53a. Moreover, the drive pin holding member 28 on which the focus cam pin 101 is formed can rotate independently of the fixed cylinder 50, the focus lens frame 25, the zoom guide cylinder 52, and the zoom drive cylinder 53, and the optical axis X It can move in the direction.
Next, the operation of the lens barrel of this embodiment will be described.

  When the zoom operation ring 51 shown in FIGS. 1 to 3 is operated to rotate the zoom drive cylinder 53, the positional relationship between the focus cam pin 101 and the three cam grooves 25a, 52a, and 53a is shown in FIGS. 16A, FIG. 16A to FIG. 16B, or FIG. 17A to FIG. 17B, that is, from the wide-angle end state to the telephoto end state. Or the reverse movement is also possible.

  When the zoom drive cylinder 53 is rotated from the wide-angle end to the telephoto end by an angle α using the zoom operation ring 51 shown in FIG. 1, the cam cylinder pin 100 engaged with the drive groove 53c of the zoom drive cylinder 53 also has an angle α. Rotated with. Since the cam cylinder pin 100 is provided on the cam cylinder 24 and is also engaged with the fixed cylinder cam groove 50b, the cam cylinder 24 advances straight while rotating at an angle α according to the fixed cylinder cam groove 50b.

  Since the zoom guide tube pin 102 is engaged with the third group lens cam groove 24a provided in the cam tube 24, the zoom guide tube 52 and the third lens group L3 are for the third group lens. The vehicle travels straight by the amount of movement obtained by adding the amount of movement in the straight direction by the cam groove 24a and the amount of straight movement of the cam cylinder 24 itself. Since the zoom guide tube 52 moves straight, the zoom drive tube 53 attached to the outer periphery of the zoom guide tube 52 also moves straight along with the zoom guide tube 52 while rotating.

  In the fourth lens group L4, the rotation is restricted by the rectilinear guide pin from the third lens group L3, and the fourth group driving pin is provided in the fourth group lens cam groove 24b provided in the cam cylinder 24. Is engaged. Therefore, the fourth lens unit L4 moves straight by the amount of movement obtained by adding the amount of movement in the straight direction by the fourth group lens cam groove 24b and the amount of straight movement of the cam barrel 24 itself.

  As described above, in the first group cylinder 38, the rotation of the first group cylinder guide groove 38a is restricted by the guide pin 52b, and the cam pin 53d and the first group cylinder cam groove 38b are engaged. Therefore, when the zoom guide tube 52 moves straight and the zoom drive tube 53 moves straight while rotating as described above, the first group tube 38 is set to the amount of straight movement of the zoom guide tube 52 and the zoom drive tube 53 and the first movement amount. A straight movement corresponding to the movement amount obtained by adding the movement amount by the first group cylinder cam groove 38b is performed together with the first lens group L1.

  The focus cam pin 101 moves straight while the zoom guide tube 52 moves straight and the zoom drive tube 53 rotates, so that the position where the correction cam groove 53a and the zoom cam groove 52a intersect, in other words, the correction cam groove. The position determined by the combination of 53a and the zoom cam groove 52a is moved. That is, a zooming operation is performed by combining or cooperating the correction cam groove 53a and the zoom cam groove 52a, and the amount of the zooming operation is determined.

  Since the focus lens frame 25 is restricted so as not to rotate during the zoom operation as described above, the focus lens frame 25 moves straight without rotating according to the movement of the focus cam pin 101.

  Here, the functions of the focus cam pin 101, the focus cam groove 25a, the correction cam groove 53a, and the zoom cam groove 52a will be described with reference to FIGS. 17 (a) and 17 (b). FIG. 17A shows the wide-angle end state, and FIG. 17B shows the telephoto end state.

  The focus cam groove 25a is a cam groove that corrects the amount of extension of the second lens unit L2, and is also a cam groove that adjusts focusing at each zooming position. As shown in FIGS. 17A and 17B, the range in which the focus cam pin 101 is relatively moved by the focus operation (the focus lens frame 25 is actually rotated by the focus operation) is an angle β range. The angle β does not change at each zooming position from the wide-angle end to the telephoto end.

  Focusing is selectively rotationally driven from a focus motor (not shown) or a focus operation ring 54 to a driving force transmission unit 25b (see FIG. 9) provided on the rear end side of the focusing lens frame 25 in the optical axis X direction. This is done by transmitting force (focus driving force). As a result, the focus lens frame 25 rotates along the focus cam groove 25a with respect to the focus cam pin 101. Therefore, the focusing lens frame 25 moves relative to the zoom guide tube 52 in the X-axis direction, moves the second lens unit L2 relative to the first lens unit L1 in the X-axis direction, and performs a focusing operation. Is possible.

  However, the cam groove curve with respect to the focus cam pin 101 in the focus cam groove 25a in the range of the angle β at each zooming position changes. For example, in FIG. 19, the zooming position at the wide-angle end is Z1, the zooming position at the telephoto end is Z5, and the intermediate positions are Z2 to Z4.

  At the zoom position Z1 at the wide-angle end, for focusing from an infinite distance to a close distance, the second lens unit L2 can be focused with the movement amount F1 within the range of the focus adjustment angle β. Further, at the zooming position Z5 at the telephoto end, for focusing from an infinite distance to a close distance, the second lens unit L2 can be focused with the movement amount F5 within the range of the focus adjustment angle β. Further, at the intermediate zoom positions Z2 to Z4, for focusing from an infinite distance to a close distance, the second lens unit L2 is focused at a movement amount F2 to F4 within the range of the focus adjustment angle β. It becomes possible. Such a relationship is represented by another graph in FIGS.

  In order to design the focus cam groove 25a so as to achieve such a design, the shape of the focus cam groove 25a is designed as follows. That is, as shown in FIG. 17A, on the wide-angle end side, even if the focus cam pin 101 is relatively moved within the focus adjustment angle β, the optical axis of the focus lens frame 25 (that is, the second lens group L2). The inclination angle of the focus cam groove 25a is designed to be small so that the amount of movement in the direction is relatively small.

  Further, as shown in FIG. 17B, on the telephoto end side, even if the focus cam pin 101 is relatively moved within the focus adjustment angle β, the optical axis of the focus lens frame 25 (that is, the second lens group L2). The inclination angle of the focus cam groove 25a is designed to be large so that the amount of movement in the direction becomes relatively large.

  Conventionally, as the zooming magnification increases, the length of the cam groove for moving the lens groups L1 to L4 becomes longer, and the length of the focus cam groove 25a with which the focus cam pin 101 engages needs to be designed longer. . However, the length of the focus cam groove 25a that can be formed in the focus lens frame 25 that holds the lens unit L2 is limited, and cannot be made too long.

  Therefore, in the present embodiment, as described above, the focus cam pin 101 is axially and freely rotatable independently from the focus lens frame 25, the fixed barrel 50, the zoom drive barrel 53, and the zoom guide barrel 52, The focus cam pin 101 is simultaneously engaged with the three cam grooves 25a, 52a, and 53a. Therefore, the zoom operation angle α of the zoom operation ring shown in FIGS. 1 to 3 is equal to the rotation angle of the zoom drive cylinder 53, and the zoom operation angle α is equal to the angle range γ of the zoom cam groove 52a. This is the sum of the angle range δ of the correction cam groove 53a.

  That is, when the focus cam pin 101 is positioned on one end side of the zoom cam groove 52a, the wide-angle end position (Wide) during zoom operation is defined, and the focus cam pin 101 is positioned on the other end side of the zoom cam groove 52a. In this case, a telephoto position (Tele) at the time of zoom operation is defined. Similarly, when the focus cam pin 101 is positioned on one end side of the correction cam groove 53a, a wide angle position (Wide) during zoom operation is defined, and the focus cam pin 101 is positioned on the other end side of the correction cam groove 53a. In the case of positioning, the telephoto position (Tele) at the time of zoom operation is defined.

  Therefore, in this embodiment, even if the zoom operation angle α corresponding to the rotational movement angle of the zoom drive cylinder 53 is relatively large, the focus cam pin 101 moves in the focus cam groove 25a from the wide angle end to the telephoto end. Can be reduced, and the length of the focus cam groove 25a in the longitudinal direction can be shortened.

  As shown in FIG. 3, in the zoom cam groove 52a, at least a part of the zoom cam groove 52a may be positioned in front of the second lens unit L2 (object side) during the zooming operation. Therefore, the distance between the first lens group L1 and the second lens group 2 can be increased, and the zooming magnification can be increased.

  In other words, the zoom drive cylinder 53 is rotated within the range of the zoom operation angle α by the zoom operation, but the angle range of movement of the focus cam pin 101 determined by the combination of the correction cam groove 53a and the zoom cam groove 52a is zoom. It is smaller than the range of the operation angle α, and in this embodiment, is the same as the angle range γ of the zoom cam groove 52a.

  In the lens barrel 1 according to the present embodiment, the drive pin holding member 28 on which the focus cam pins 101 that are simultaneously engaged with the cam grooves 25a, 52a, and 53a are formed as the fixed cylinder 50, the focus lens frame 25, The zoom guide cylinder 52 and the zoom drive cylinder 53 are arranged in a floating manner. That is, the drive pin holding member 28 can be rotated about the optical axis X independently of the fixed cylinder 50, the focusing lens frame 25, the zoom guide cylinder 52, and the zoom drive cylinder 53 and in the optical axis X direction. It is arranged to move freely. Therefore, even if the focus lens frame 25, the zoom guide tube 52, and the zoom drive tube 53 move greatly in the optical axis X direction with respect to the fixed tube 50 by the zoom operation, the drive pin holding member 28 follows it. Can also move while rotating in the direction of the optical axis.

  As a result, even if the shape of the focus cam groove 25a that mainly performs focus adjustment at each zooming position is preferentially designed, the zoom cam groove 52a and the correction cam groove 53a for mainly performing a high-magnification zoom operation. The groove shape will not be too steep. Therefore, even in the zoom lens barrel 1 with a high magnification, the zoom operation and the focus operation can be performed smoothly, and the cylinders 25, 52, 53 in which the cam grooves 25a, 52a, 53a are formed have a compact configuration. As a result, the entire lens barrel 1 can be made compact.

  Further, in this embodiment, even if the vibration reduction system VR is arranged on the image plane side of the second lens unit L2, it is not necessary to enlarge the cam mechanism for realizing high magnification, and in this respect, the lens The entire lens barrel 1 can be made compact. Moreover, since the cam mechanism is not complicated, it contributes to the reduction of the number of parts.

  In particular, in this embodiment, the shape of the correction cam groove 53a is a non-linear nonlinear shape, and a bent portion is provided in the middle of the correction cam groove 53a in the longitudinal direction, so that the zoom drive cylinder 53 can be moved from the wide-angle end to the telephoto end. During the rotation, the movement of the relative position of the focus cam pin 101 in the focus cam groove 25a can be finely controlled. Further, by making it non-linear, it is possible to finely adjust the change rate of the focal length of the lens groups L1 to L2 with respect to the rotation angle of the zoom operation ring 51 for operating the zoom magnification between the wide angle mode and the telephoto mode. Become easy to use.

  In this embodiment, since the zoom operation angle α can be made relatively large, the curve of the focus cam groove 25a can be made as gentle as possible, and the driving force required for the focus operation can be reduced.

  In order to change the zoom magnification from the wide-angle end (Wide) to the telephoto end (Tele) or vice versa while maintaining the focusing, the lens groups L1 to L4 shown in FIGS. For example, suppose that it is necessary to move in the movement locus shown in FIG. Further, in terms of optical design, as shown by a curve C2 shown in FIG. 22, when the zoom operation angle is changed from 0 to the maximum angle α = 80 degrees, the zoom operation angle is shown at each position (vertical axis). It is designed to change so as to be the focal length of the horizontal axis.

  However, in such an optical design, it may actually be difficult to design the cam grooves 52a, 53a, and 25a shown in FIGS. 17 (a) and 17 (b). Further, in the movement trajectory of the lens groups L2 and L3 shown in FIG. 18A, the distance between the lens groups L2 and L3 is narrow, and the vibration reduction system shown in FIG. It may be difficult to arrange VR. Further, as shown by the curve C1 in FIG. 22, the change in the focal length is small with respect to the change in the rotation angle of the zoom operation angle on the wide angle end side, and the change in the rotation angle of the zoom operation angle on the telephoto side. There are also demands such as increasing the focal length and improving usability.

  In the present embodiment, by realizing the groove shapes of the cam grooves 25a, 52a, and 53a shown in FIGS. 17A and 17B, the lens groups L1 to L1 with respect to changes in the rotation angle of the zoom operation angle. As shown in FIG. 18B, the movement locus of L4 is realized. As a result, the change in the focal length with respect to the change in the rotation angle of the zoom operation angle indicated by the curve C1 in FIG. 22 is realized.

  In other words, in the present embodiment, the shape of the focus cam groove 25a is determined with priority, so if the correction cam groove 53a has a linear cam shape, the first lens group L1, the third lens group L3, and so on. The moving amount of the fourth lens unit L4 is larger on the telephoto side than on the wide angle side. As a result, the fixed barrel cam groove 50b has an extremely large gradient near the telephoto end.

  Therefore, in the present embodiment, the correction cam groove 53a is formed in a non-linear cam shape, and the movement amounts of the first lens unit L1, the third lens unit L3, and the fourth lens unit L4 with respect to the zoom operation rotation angle of the zoom operation ring 51 are set. It does not change so much depending on the zooming position. That is, the amount of rotation in the range used near the telephoto is apparently larger than the range used near the wide angle in the fixed cylinder cam groove 50b. Therefore, it is possible to prevent the gradient of the fixed cylinder cam groove 50b from being extremely increased in a part and to smoothly drive at any zooming position.

  Even if the shape of the fixed cylinder cam groove 50b is determined with priority, if the correction cam groove 53a is linearly shaped, the gradient of the focus cam groove 25a increases in part, This will adversely affect the focus accuracy. Therefore, it is desirable that the correction cam groove 53a has a non-linear cam shape. The zoom cam groove 52a is also preferably non-linear.

  In this embodiment, as shown in FIGS. 12 and 13, the zoom lens barrel 102 in the optical axis direction is not formed in the cam groove 24 a for the third lens group of the cam barrel 24 in parallel with the rotational direction. By moving the zoom lens barrel 52 and the third lens unit L3, the amount of movement for linearly moving the zoom guide tube 52 and the third lens unit L3 is distributed to the third group lens cam groove 24a. As a result, it is possible to reduce the amount of movement of the cam cylinder 24 that the fixed cylinder cam groove 50b carries straight, and the gradient of the fixed cylinder cam groove 50b can be further moderated.

  According to the present embodiment, the zoom operation and the focus operation can be smoothly performed even with a lens barrel that zoom-drives a high-magnification photographing optical system.

  Further, since the outer diameter of the drive pin holding member 28 is smaller than the inner diameter of the fixed cylinder 50, the lens barrel can be made smaller.

Further, since the first lens unit Ll and the second lens unit L2 are supported by the zoom guide tube 52 fitted to the fixed tube 50, the first lens unit Ll and the second lens unit L2 have a structure in which the optical axis is not easily tilted. Since the lens group L3 and the fourth lens group L4 are supported by the cam cylinder 24 fitted to the fixed cylinder 50, the lens group L3 and the fourth lens group L4 have a structure in which the optical axis is not easily tilted. Therefore, although the four lens units of the first lens unit L1 to the fourth lens unit L4 are high-magnification zoom lens barrels, all the lens units are not easily tilted with respect to the optical axis, and good optics from wide angle to telephoto Performance can be kept.
(Modification)

  The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the scope of the present invention.

  For example, in this embodiment, the correction cam groove 53a and the zoom cam groove 52a perform both the feed amount correction and the rotation angle conversion. However, the present invention is not limited to this. For example, the cam groove 53a , 52a may be used to perform only rotation angle conversion.

  In the present embodiment, an example of an interchangeable lens has been described. However, the present invention is not limited to this. For example, a lens-integrated camera in which the lens cannot be removed from an imaging unit such as an image sensor may be used.

It is a longitudinal cross-sectional view which shows the wide angle state of the lens-barrel which concerns on one Embodiment of this invention. FIG. 2 is a longitudinal sectional view showing a wide angle state of the lens barrel shown in FIG. 1 with a longitudinal section different from FIG. 1. It is sectional drawing which shows the telephoto state of the lens-barrel shown in FIG. FIG. 4 is a perspective view showing a telephoto state in a fixed cylinder, a zoom drive cylinder, and a first group cylinder in the lens barrel shown in FIG. 3. FIG. 5 is an exploded perspective view of the zoom drive cylinder, the zoom guide cylinder, and the drive pin holding member shown in FIG. 4. It is a perspective view of the zoom drive cylinder and zoom guide cylinder shown in FIG. It is a perspective view of the zoom drive cylinder shown in FIG. FIG. 7 is a perspective view of the zoom guide tube shown in FIG. 6. FIG. 4 is a perspective view of the focusing lens frame shown in FIGS. 1 to 3. It is a perspective view of the drive pin holding member shown in FIGS. It is a perspective view of the fixed cylinder shown in FIGS. It is a perspective view which shows the cam cylinder located inside the fixed cylinder shown in FIG. 11, and its inside. FIG. 13 is a perspective view of the cam cylinder alone shown in FIG. 12. FIG. 3 is a diagram of a fixed cylinder, a zoom guide cylinder, a zoom drive cylinder, a cam cylinder, a focus lens frame, and a first group cylinder in a wide-angle end state as viewed from the outer periphery side. FIG. 3 is a diagram of a fixed cylinder, a zoom guide cylinder, a zoom drive cylinder, a cam cylinder, a focus lens frame, and a first group cylinder in a telephoto end state as viewed from the outer peripheral side. (A) is the development which extracted the principal part of FIG. 14, (b) is the development which extracted the principal part of FIG. (A) is the schematic which extracted three cam grooves and drive pins in Fig.16 (a), (b) is the schematic which extracted three cam grooves and drive pins in FIG.16 (b). (A) is a figure which shows the locus | trajectory to which each lens group moves from the zooming wide-angle end calculated | required by optical design to the zooming telephoto end, (b) is each lens group actually zooming wide-angle by the cam groove shape after correction | amendment. It is a figure which shows the locus | trajectory which moves from an end to a zooming telephoto end. It is a figure which shows the moving amount | distance of the lens frame for a focus in each zooming position from a zooming wide-angle end to a zooming telephoto end. It is a graph which shows the relationship between the movement amount of the lens frame for a focus in each zooming position, and the rotation angle of a focus operation ring. 6 is a graph showing the amount of movement of the focusing lens frame at each zooming position as a single curve with the origin shifted. It is a graph which shows the relationship between the focal distance of the lens-barrel which concerns on this embodiment, and the rotation angle of a zoom operation ring.

Explanation of symbols

  25 Focus lens frame: 25a Focus cam groove: 52 Zoom guide tube: 52a Zoom cam groove: 53: 53a Drive tube: L2 Second lens group

Claims (27)

A first moving cylinder having a first cam groove defined corresponding to a focusing operation and holding an optical system used for the focusing operation;
A second moving cylinder having a second cam groove and provided in association with the first moving cylinder;
A third moving cylinder having a third cam groove defined corresponding to the zooming operation and movable relative to the fixed cylinder;
A drive cam pin that engages with the first cam groove, the second cam groove, and the third cam groove;
Holds the drive cam pin, and holds the first movable cylinder, the second movable cylinder, and the third movable cylinder so as to be rotatable about the optical axis and movable in the optical axis direction. Including members,
The third moving cylinder is rotatable at a first angle corresponding to the rotation of the zoom operation ring,
The first angle is a sum of a second angle at which the driving cam pin rotates along the second cam groove and a third angle at which the driving cam pin rotates along the third cam groove. A lens barrel characterized by being compatible . The lens barrel according to claim 1,
The vibration reduction system to eliminate the influence of vibration of the lens barrel to the image plane side of the optical system are provided
A lens barrel characterized by The lens barrel according to claim 1,
The synthesis of the second cam groove and the third cam groove, said zooming operation is carried out
A lens barrel characterized by The lens barrel according to claim 1,
It said second cam groove, during zooming operation, the lens barrel at least a portion of the second cam groove, characterized in that the may be located on the object side of the optical system. The lens barrel according to any one of claims 1 to 4, wherein
During the zooming operation, the driving cam pin moves by a moving amount obtained by combining the second cam groove and the third cam groove, and moves the optical system in the optical axis direction according to the movement of the driving cam pin. Move
During the focusing operation, the optical system is moved in the optical axis direction by rotating the first moving cylinder with respect to the driving cam pin.
A lens barrel characterized by The lens barrel according to any one of claims 1 to 5,
In the direction crossing the axial direction of the first moving cylinder and the third moving cylinder, the distance between the first moving cylinder and the third moving cylinder is shorter than the length of the driving cam pin.
A lens barrel characterized by The lens barrel according to any one of claims 1 to 6,
The second movable cylinder is provided between the first movable cylinder and the third movable cylinder.
A lens barrel characterized by A lens barrel according to any one of claims 1 to 7,
The zooming operation is performed by combining the second cam groove and the third cam groove.
A lens barrel characterized by The lens barrel according to any one of claims 1 to 8,
The second movable cylinder holds the first movable cylinder so that the first movable cylinder can move in response to a zooming operation.
A lens barrel characterized by The lens barrel according to any one of claims 1 to 9,
The first moving cylinder moves relative to the second moving cylinder by rotating with respect to the driving cam pin along the first cam groove during the focusing operation.
A lens barrel characterized by A lens barrel according to any one of claims 1 to 10,
The drive cam pin is formed on the outer periphery of the holding member in a direction crossing the optical axis direction.
A lens barrel characterized by Engaging the first cam groove formed in the first moving cylinder holding the optical system used for the focusing operation with the driving cam pin, and moving the optical system;
Engaging a second cam groove provided in a second moving cylinder provided in association with the first moving cylinder with the driving cam pin ;
A third cam groove provided in a third movable cylinder movable relative to the fixed cylinder is engaged with the driving cam pin ;
Moving the driving cam pin by an amount of movement determined by the combination of the second cam groove and the third cam groove;
The optical system is moved in the optical axis direction in accordance with the movement of the driving cam pin, and the position of the optical system during zoom operation is determined .
A method for operating a lens barrel, wherein the optical system is moved in an optical axis direction by rotating the first moving cylinder with respect to the driving cam pin during focusing driving . A method of operating a lens barrel according to claim 12 ,
Removing the image plane side of the optical system the influence of vibration of the lens barrel
A method of operating a lens barrel characterized by the above . A method of operating a lens barrel according to claim 13 ,
The synthesis of the second cam groove and the third cam groove, to perform the zoom operation
A method of operating a lens barrel characterized by the above . A method of operating a lens barrel according to claim 14 ,
A method of operating a lens barrel, wherein at least a part of the second cam is positioned closer to the object side than the optical system during a zooming operation. A method of operating a lens barrel according to any one of claims 12 to 15,
During the zooming operation, the driving cam pin moves by a moving amount obtained by combining the second cam groove and the third cam groove, and moves the optical system in the optical axis direction according to the movement of the driving cam pin. Move
During the focusing operation, the optical system is moved in the optical axis direction by rotating the first moving cylinder with respect to the driving cam pin.
A method of operating a lens barrel characterized by the above. A method of operating a lens barrel according to any one of claims 12 to 16,
In the direction crossing the axial direction of the first moving cylinder and the third moving cylinder, the distance between the first moving cylinder and the third moving cylinder is shorter than the length of the driving cam pin.
A method of operating a lens barrel characterized by the above. A method for operating a lens barrel according to any one of claims 12 to 17,
The second movable cylinder is provided between the first movable cylinder and the third movable cylinder.
A method of operating a lens barrel characterized by the above. A method of operating a lens barrel according to any one of claims 12 to 18,
The zooming operation is performed by combining the second cam groove and the third cam groove.
A method of operating a lens barrel characterized by the above. A method for operating a lens barrel according to any one of claims 12 to 19,
The second movable cylinder holds the first movable cylinder so that the first movable cylinder can move in response to a zooming operation.
A method of operating a lens barrel characterized by the above. A method of operating a lens barrel according to any one of claims 12 to 20,
The first moving cylinder moves relative to the second moving cylinder by rotating with respect to the driving cam pin along the first cam groove during the focusing operation.
A method of operating a lens barrel characterized by the above. A method of operating a lens barrel according to any one of claims 12 to 21,
The drive cam pin is formed on the outer periphery of the holding member in a direction crossing the optical axis direction.
A method of operating a lens barrel characterized by the above. In the lens barrel according to any one of claims 1 to 11,
The second cam groove and / or the third cam groove have a non-linear cam shape;
A lens barrel characterized by The lens barrel according to any one of claims 1 to 11, and any one of claims 23 ,
The first cam groove , the second cam groove , the third cam groove and the cam pin are provided with a plurality of sets having the same shape,
Having a cam pin connecting member that integrally connects the plurality of cam pins;
A lens barrel characterized by The lens barrel according to claim 24 ,
A cylindrical member that does not move during the first operation and the second operation, and has a fixed cylinder rectilinear groove that is a groove parallel to the optical axis direction of the photographing optical system, and a fixed member having a fixed cylinder cam With a cylinder,
The drive cylinder has a drive cylinder rectilinear groove parallel to the optical axis, and is provided so as to be rotatable with respect to the guide cylinder and to advance linearly integrally with the guide cylinder,
A cylindrical member that fits movably on the inner periphery of the fixed cylinder and moves straight while rotating during the first operation, and is formed into a groove perpendicular to the straight direction or a cam groove. A cam cylinder having a cam cylinder pin that engages with the drive cylinder rectilinear groove and engages with the fixed cylinder cam;
The guide cylinder has a guide cylinder pin that engages with the cam cylinder groove;
A lens barrel characterized by The lens barrel according to claim 25 ,
The outer diameter of the cam pin connecting member is smaller than the inner diameter of the fixed cylinder;
A lens barrel characterized by A lens barrel according to any one of claims 1 to 11, and 23 to 26 ,
A photographing unit for photographing a subject image obtained by the lens barrel;
A camera system comprising:

Images