Lens device

Abstract

To provide a compact lens device with operating rings.SOLUTION: A lens device provided herein comprises a lens barrel, a first operating ring provided on an outer periphery of the lens barrel and configured to be turned along a circumferential direction of the lens barrel, and a structure for generating a force in a direction opposite an operating direction of the first operating ring, where the first operating ring and the structure are disposed on the image side of an aperture provided inside the lens barrel.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a lens device. [Background technology]

[0002] Patent Document 1 describes a lens device equipped with a zoom ring and a zoom lever. In Patent Document 1, the zoom lever is composed of an arc-shaped member and is slid along the circumferential direction of the lens barrel. Also in Patent Document 1, the zoom lever is used to quickly change the focal length of the optical system.

[0003] Patent Document 2 describes a lens device equipped with an operation ring and a zoom lever. In Patent Document 2, the zoom lever is composed of an arc-shaped member and is slid along the circumferential direction of the lens barrel. Also in Patent Document 2, the zoom lever is used to change the zoom at a constant speed.

[0004] Patent Document 3 describes a lens device having an electric zoom mechanism, in which zooming is performed by a ring-shaped electric zoom switch provided on the outer periphery of the lens barrel. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2012 / 035778 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-77878 [Patent Document 3] Japanese Patent Application Publication No. 03-108964 Summary of the Invention

[0006] One embodiment of the technique of the present disclosure provides a compact lens device equipped with an operation ring. [Means for solving the problem]

[0007] (1) A lens device comprising a lens barrel, a first operating ring provided on the outer periphery of the lens barrel and rotated in the circumferential direction of the lens barrel, and a structure that generates a force on the first operating ring in the direction opposite to the operating direction, wherein the first operating ring and the structure are positioned closer to the image side than the position of the aperture located within the lens barrel.

[0008] (2) A lens device according to (1), wherein the first operating ring is rotated within a specific angle range.

[0009] (3) A lens device according to (1) or (2), wherein the structure automatically returns the first operating ring to a specific position.

[0010] (4) A lens device according to any one of (1) to (3), wherein the structures are arranged at multiple locations in the circumferential direction.

[0011] (5) The lens device of (4), wherein the structure is capable of adjusting the force acting on the first operating ring at at least one location.

[0012] (6) A lens device according to any one of (1) to (5), wherein the structure is disposed between the lens barrel and the first operating ring.

[0013] (7) A lens device according to any one of (1) to (6), wherein the structure comprises a cam pin supported so as to be movable along the optical axis direction and a spring that biases the cam pin in the optical axis direction, and the cam pin fits into a cam groove on a first operating ring having a cam groove.

[0014] (8) The lens device of (7), wherein the structure includes at least a pair of springs that sandwich the cam pin and urge it in opposite directions.

[0015] (9) A lens device according to (7) or (8), wherein the structure comprises a base member that is detachably attached to the lens barrel, a cam pin is movably supported on the base member, and a spring is held on the base member.

[0016] (10) A lens device according to any one of (1) to (9), wherein the structure is positioned radially outward of a lens positioned closer to the image side than the aperture position, and radially inward of the first operating ring.

[0017] (11) A lens device according to any one of (1) to (10), wherein the lens barrel comprises a first lens barrel that holds a lens and a second lens barrel that holds the first lens barrel, and the first operating ring and structure are provided on the second lens barrel.

[0018] (12) A lens device according to any one of (1) to (8), wherein the lens barrel has a plurality of operation rings including a first operation ring on the outer periphery of the lens barrel, and the operation rings other than the first operation ring are at least one of a zoom ring, a focus ring, and an aperture ring, and the first operation ring has the smallest diameter among the plurality of operation rings.

[0019] (13) The lens device of (12), wherein the first operating ring is positioned furthest from the image side among the plurality of operating rings.

[0020] (14) A lens device according to any one of (1) to (13), wherein the lens barrel has a first convex portion in the shape of an arc extending circumferentially along at least a portion of the outer periphery of the lens barrel, and the first operating ring is disposed adjacent to the first convex portion.

[0021] (15) The lens device of (14), wherein the height of the first convex portion in the outer diameter direction of the lens barrel is relatively higher than the height of the first operation ring.

[0022] (16) The lens device of (14) or (15), wherein the first convex portion includes an operating member for setting the first operating ring and is disposed closer to the image side than the first operating ring.

[0023] (17) The lens device according to any one of (1) to (16), wherein the first operation ring has a second convex portion in the shape of an arc extending circumferentially on at least a portion of the outer periphery of the first operation ring.

[0024] (18) A lens device according to (17), wherein the first operating ring has a second convex portion having an arc shape extending circumferentially on a portion of the outer periphery of the first operating ring, and the second convex portion is positioned at a position different from the position of the structure in the circumferential direction.

[0025] (19) A lens device according to any one of (1) to (18), wherein the first operating ring is used for zooming operations.

[0026] (20) A lens device according to any one of (1) to (19), comprising a mount at the image-side end of the lens barrel. [Brief explanation of the drawings]

[0027] [Figure 1] A front perspective view showing the external configuration of the interchangeable lens [Figure 2] A rear perspective view showing the external configuration of the interchangeable lens [Figure 3] Right side view showing the external configuration of the interchangeable lens [Figure 4] Left side view showing the external configuration of the interchangeable lens [Figure 5] A plan view showing the external configuration of the interchangeable lens [Figure 6] Rear view showing the external configuration of the interchangeable lens [Figure 7] Cross-sectional view showing the schematic internal structure of the interchangeable lens [Figure 8] A diagram showing the schematic configuration of an automatic return mechanism [Figure 9] Exploded perspective view of the zoom lever ring [Figure 10] Exploded perspective view of the pressurized unit [Figure 11] Plan view of the pressurized unit [Figure 12] Section 12-12 of Figure 11 [Figure 13] Section 13-13 of Figure 11 [Figure 14] A perspective view of the cam groove on the zoom lever ring [Figure 15] Diagram showing the relationship between zoom lever ring operation and cam pin movement [Figure 16]A graph showing an example of the relationship between the rotation angle of the zoom lever ring and the zoom speed DETAILED DESCRIPTION OF THE INVENTION

[0028] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] Here, the present invention will be described by taking as an example a case where it is applied to an interchangeable lens of an interchangeable lens camera, which is an example of a lens device.

[0030] [Interchangeable lens configuration] Appearance Configuration FIG. 1 is a front perspective view showing the external configuration of an interchangeable lens. FIG. 2 is a rear perspective view showing the external configuration of an interchangeable lens. FIG. 3 is a right side view showing the external configuration of an interchangeable lens. FIG. 4 is a left side view showing the external configuration of an interchangeable lens. FIG. 5 is a plan view showing the external configuration of an interchangeable lens. FIG. 6 is a rear view showing the external configuration of an interchangeable lens.

[0031] The interchangeable lens 1 of this embodiment is a zoom lens, and in particular, a lens with a fixed overall length. A lens with a fixed overall length is a lens whose overall length does not change with zoom and focus operations.

[0032] Furthermore, the interchangeable lens 1 of this embodiment is a zoom lens equipped with an electric zoom (also called power zoom) function. Electric zoom is a function that electrically zooms in response to a zoom operation by the user. In other words, it is a function that zooms by moving a group of zoom lenses with a motor.

[0033] As shown in FIGS. 2 to 5, the interchangeable lens 1 has a mount 11 at the rear end (image side, right side in FIG. 3) of its lens barrel 10. The interchangeable lens 1 is detachably attached to the camera body via the mount 11. There are no particular restrictions on the mount standard. As an example, a bayonet mount is used in this embodiment.

[0034] 1 to 5, interchangeable lens 1 has multiple operation rings on the outer periphery of its lens barrel 10. The multiple operation rings are composed of, in order from the front side (object side, left side in FIG. 3), a focus ring 12, a zoom ring 13, and a zoom lever ring 14.

[0035] The focus ring 12 is an operating member for focus operation that is rotated in the circumferential direction of the lens barrel 10. The focus ring 12 can rotate forward and backward, and the focus direction is controlled depending on the direction of rotation. The focus ring 12 can also rotate infinitely, and the amount of focus movement (amount of movement of the focal position) is controlled depending on the angle of rotation (amount of rotation). The outer periphery of the focus ring 12 is knurled, and has a predetermined pattern of unevenness (one example is a flat knurl).

[0036] The zoom ring 13 is an operating member for zooming that is rotated in the circumferential direction of the lens barrel 10. The zoom ring 13 can rotate forward and backward, and the zoom direction is controlled depending on the direction of rotation. The zoom ring 13 can also rotate infinitely, and the zoom amount (the amount of change in the angle of view or focal length) is controlled depending on the angle of rotation. The outer periphery of the zoom ring 13 is knurled, and has a predetermined pattern of unevenness (one example is a flat knurl).

[0037] The zoom lever ring 14 is an operating member that is rotated within a specific angular range along the circumferential direction of the lens barrel 10. The zoom lever ring 14 is primarily used for zooming. The zoom lever ring 14 can rotate forward and backward around a neutral point, and the direction of zooming is controlled depending on the direction of rotation. The zoom lever ring 14 can also rotate within a specific angular range (for example, ±13°) around the neutral point, and the zoom speed (speed at which the angle of view changes) is controlled depending on the angle of rotation. In other words, the zoom lever ring 14 is used for variable-speed zooming. Details of variable-speed zooming will be described later.

[0038] The zoom lever ring 14 also has an automatic return function, automatically returning to the neutral point when released after operation. The zoom lever ring 14 has two arc-shaped protrusions 14R and 14L extending circumferentially from its outer periphery. The two protrusions 14R and 14L function as grips when operating the zoom lever ring 14 and are arranged symmetrically on either side of the optical axis. More specifically, when the interchangeable lens 1 is attached to the camera body and viewed from the front, the protrusions 14R and 14L are arranged symmetrically on either side of the optical axis. Each of the protrusions 14R and 14L has a knurled circumferential surface and has a predetermined pattern of irregularities (for example, a flat knurl). Each of the protrusions 14R and 14L has sloped surfaces 14Rs and 14Ls at both circumferential ends. In this embodiment, the zoom lever ring 14 is an example of a first operation ring. The two protrusions 14R and 14L provided on the zoom lever ring 14 are an example of a second protrusion.

[0039] As shown in FIG. 5, in the interchangeable lens 1 of this embodiment, of the three operating rings (focus ring 12, zoom ring 13, and zoom lever ring 14), the zoom ring 13 has the widest width (length in the optical axis direction) and the zoom lever ring 14 has the narrowest width.

[0040] 5, of the three operation rings, the focus ring 12 and the zoom ring 13 have substantially the same outer diameter φ1, while the zoom lever ring 14 has an outer diameter φ2 that is smaller than the focus ring 12 and the zoom ring 13. In other words, the zoom lever ring 14 has the smallest outer diameter. Note that the outer diameter of the zoom lever ring 14 here refers to the outer diameter including the protrusions 14R and 14L. In other words, it is the outer diameter at the largest diameter.

[0041] 5, in the interchangeable lens 1 of this embodiment, of the three operation rings, the zoom lever ring 14 is arranged at the rearmost side (image side). The arrangement of the zoom lever ring 14 will be described in detail later.

[0042] 1 and 3, the interchangeable lens 1 has a button operation unit 15 on the right side of the outer periphery of its lens barrel 10. The button operation unit 15 has an arc-shaped convex portion 15A that extends circumferentially.

[0043] The convex portion 15A is disposed closer to the image side than the zoom lever ring 14, and is disposed adjacent to the zoom lever ring 14. In particular, in the interchangeable lens 1 of this embodiment, as shown in FIG. 3, the convex portion 15A is disposed adjacent to the protrusion 14R on one side (the right side in front view) of the zoom lever ring 14 positioned at the neutral point.

[0044] Like the protrusions 14R and 14L of the zoom lever ring 14, the protrusion 15A has sloped surfaces 15As at both ends in the circumferential direction. When the zoom lever ring 14 is positioned at the neutral point, the sloped surfaces 14Rs at both ends of the protrusion 14R on one side are arranged parallel to the sloped surfaces 15As at both ends of the protrusion 15A. This makes it possible to determine the amount of operation of the zoom lever ring 14 from the amount of deviation between the sloped surfaces 14Rs of the protrusion 14R and the sloped surfaces 15As of the protrusion 15A when the zoom lever ring 14 is operated. In other words, because the two are arranged parallel to each other, the amount of deviation when operated can be sensed by touch, making it possible to intuitively grasp the amount of operation of the zoom lever ring 14 without visual inspection.

[0045] In the interchangeable lens 1 of this embodiment, the convex portion 15A is relatively taller (height in the outer diameter direction with the optical axis as the reference) than the protrusion 14R of the zoom lever ring 14. This allows the finger to come into contact with the convex portion 15A when gripping the protrusion 14R to operate the zoom lever ring 14. As a result, it is possible to confirm that only the zoom lever ring 14 has been operated without visually checking the position of the zoom lever ring 14. In this embodiment, the convex portion 15A of the button operation unit 15 is an example of a first convex portion.

[0046] The button operation unit 15 has a plurality of operation members on the circumferential surface of the protrusion 15A. The plurality of operation members are constituted by a switching button 16 and a zoom button 17.

[0047] The switching button 16 is a circular push button. The switching button 16 is used to switch the function assigned to the zoom lever ring 14. Each time the switching button 16 is pressed, the interchangeable lens 1 switches the function assigned to the zoom lever ring 14. In this embodiment, the switching button 16 is an example of an operating member for configuring settings related to the first operating ring.

[0048] The zoom button 17 is a pair of rounded rectangular push buttons. Specifically, it is composed of a zoom tele button 17T and a zoom wide button 17W. The zoom tele button 17T and the zoom wide button 17W are arranged in a vertical row along the circumferential direction. The zoom button 17 is an operating member for zooming, and is used for constant speed zoom. Constant speed zoom is a function that zooms at a constant speed. While the zoom button is pressed, the angle of view changes at a constant speed. When the zoom tele button 17T is pressed, the zoom changes to the tele side at a constant speed. On the other hand, when the zoom wide button 17W is pressed, the zoom changes to the wide side at a constant speed.

[0049] [Internal structure] FIG. 7 is a cross-sectional view showing a schematic internal configuration of the interchangeable lens.

[0050] [Optical system configuration] As shown in the figure, the interchangeable lens 1 of this embodiment has, in order from the object side (the left side in FIG. 7), a first lens group L1, a second lens group L2, a third lens group L3, a fourth lens group L4, and a fifth lens group L5. The interchangeable lens 1 of this embodiment also has a diaphragm S between the second lens group L2 and the third lens group L3.

[0051] In the interchangeable lens 1 of this embodiment, the first lens group L1, the third lens group L3, and the fifth lens group L5 are fixed lens groups, while the second lens group L2 and the fourth lens group L4 are movable lens groups. Each lens group is composed of at least one lens.

[0052] In the interchangeable lens 1, the focal position changes by moving the fourth lens group L4 along the optical axis Z. In other words, focus adjustment is performed.

[0053] Furthermore, the focal length of the interchangeable lens 1 changes when the second lens group L2 moves along the optical axis Z. In other words, zooming is performed. Note that the fourth lens group L4 also moves during zooming. The fourth lens group L4 moves in conjunction with the second lens group L2, compensating for fluctuations in the focal position that occur during zooming. In other words, the fourth lens group L4 also functions as a compensator.

[0054] The diaphragm S is configured by, for example, an iris diaphragm. A unit (diaphragm unit) SU including a drive mechanism for the diaphragm S is disposed between the second lens group L2 and the third lens group L3.

[0055] [Lens barrel] The lens barrel 10 is mainly composed of a lens barrel main body 20 and an exterior body 40 .

[0056] The barrel body 20 has an inner tube 21 and an outer tube 22. The outer tube 22 holds the inner tube 21 coaxially on its inner periphery. In other words, the barrel body 20 has a dual structure. The inner tube 21 is fixed to the outer tube 22 by fixing means (e.g., screws) not shown, and is integrated with the outer tube 22. The barrel body 20 constitutes a fixed tube, and a mount 11 is attached to its rear end (the end on the right side in FIG. 1).

[0057] The main function of the inner cylinder 21 is to hold the optical system. In this embodiment, the inner cylinder 21 is an example of a first lens barrel.

[0058] The first lens group L1 is held by the first lens frame 23. As described above, the first lens group L1 is a fixed lens group. The first lens frame 23 is fixed and held at a predetermined position on the inner cylinder 21.

[0059] The second lens group L2 is held by the second lens frame 24. As described above, the second lens group L2 is a moving lens group. The second lens frame 24 is held so as to be movable along a guide shaft 25 arranged inside the inner cylinder 21. The guide shaft 25 is arranged along the optical axis Z. Therefore, the second lens group L2 is held so as to be movable along the optical axis Z.

[0060] The second lens group L2 is driven by a zoom motor 26. The zoom motor 26 is, for example, a coreless motor. A lead screw 27 is arranged inside the inner barrel 21 along the optical axis Z. The second lens frame 24 is connected to a nut 28 attached to the lead screw 27. The zoom motor 26 is connected to the lead screw 27 and rotates the lead screw 27. When the lead screw 27 is rotated by the zoom motor 26, the nut 28 moves along the lead screw 27. This causes the second lens group L2 to move along the optical axis Z.

[0061] The third lens group L3 is held by the third lens frame 29. As described above, the third lens group L3 is a fixed lens group. The third lens frame 29 is fixed and held at a predetermined position on the inner cylinder 21.

[0062] The aperture unit SU is attached to the front side (object side, left side in FIG. 7) of the third lens frame 29, and is disposed at a predetermined position inside the inner cylinder 21.

[0063] The fourth lens group L4 is held by the fourth lens frame 30. As described above, the fourth lens group L4 is a movable lens group. The fourth lens frame 30 is held so as to be movable along a main shaft 31 and a sub shaft 32 arranged inside the inner cylinder 21. Both the main shaft 31 and the sub shaft 32 are arranged along the optical axis Z. Therefore, the fourth lens group L4 is held so as to be movable along the optical axis Z.

[0064] The fourth lens group L4 is driven by a focus motor (not shown). The focus motor is, for example, a linear motor, and moves the fourth lens frame 30 directly along the optical axis Z.

[0065] The fifth lens group L5 is held by the fifth lens frame 33. As described above, the fifth lens group L5 is a fixed lens group. The fifth lens frame 33 is fixed and held at a predetermined position on the inner cylinder 21.

[0066] The outer cylinder 22 functions as a mounting portion for the exterior body 40 and the operation ring. In this embodiment, the outer cylinder 22 is an example of a second lens barrel.

[0067] The exterior body 40 is mainly composed of a front cover 41, a mid cover 42, and a rear cover 43. The front cover 41 is attached to the outer periphery of the front end of the outer barrel 22. The mid cover 42 is attached to the center of the outer barrel 22. The mid cover 42 has a fixing ring portion 42A at its rear end. The mid cover 42 is positioned so that its fixing ring portion 42A is exposed on the outer periphery of the lens barrel 10, between the zoom ring 13 and the zoom lever ring 14. The fixing ring portion 42A is positioned adjacent to the zoom lever ring 14, and has a larger outer diameter than the zoom lever ring 14. The rear cover 43 is attached to the outer periphery of the rear end of the outer barrel 22. The exterior body 40 attached to the outer barrel 22 is fixed to the outer barrel 22 with fixing means (e.g., screws) not shown, and is integrated with the outer barrel 22.

[0068] [Operation ring placement] As described above, the interchangeable lens 1 of this embodiment has three operation rings (focus ring 12, zoom ring 13, and zoom lever ring 14). The three operation rings are arranged in the following order from the front side (object side): focus ring 12, zoom ring 13, and zoom lever ring 14.

[0069] Of the three operation rings, only the zoom lever ring 14 has an automatic return function. That is, the remaining two operation rings (focus ring 12 and zoom ring 13) are operation rings that stop in their positions when operation is stopped. The zoom lever ring 14, which has this automatic return function, is located at the rearmost side (image side). The zoom lever ring 14 is also located so as to satisfy the following condition: That is, as shown in FIG. 7, the zoom lever ring 14, including its automatic return mechanism, is located behind (image side) the aperture S. More specifically, it is located between the aperture plane and the mount surface. This allows for the interchangeable lens 1 to be compact overall, without increasing the radial size even when the zoom lever ring 14 is provided.

[0070] Generally, the lenses constituting an optical system have the following relationship in terms of effective diameter: front lens to aperture position > aperture position to final lens. Here, the front lens is the lens located closest to the object. The final lens is the lens located closest to the image. That is, based on the aperture position, the effective diameter of the lens located closest to the image is smaller than that of the lens located closest to the object. That is, their maximum outer diameters are smaller. Therefore, when an optical system is housed in a lens barrel of the same size, more space can be secured radially from the aperture position to the image side than from the aperture position to the object side. Therefore, by locating the zoom lever ring 14 at this position, i.e., at the position closest to the image side relative to the aperture, the zoom lever ring 14 can be provided without increasing the diameter of the lens barrel. This is particularly effective in a lens device in which the second lens group L2 functions as a variator, such as the interchangeable lens 1 of this embodiment. That is, in a lens device in which the second lens group L2 functions as a variator, the second lens group L2 has a large movable range and moves fully between the first lens group L1 and the aperture unit SU. In this case, a lens with a large effective diameter moves close to the aperture, so it is necessary to secure lens barrel space within that movable range. Therefore, if there is no space between the lens and the lens barrel and a zoom lever ring 14 with an automatic return function is placed, the diameter of the lens barrel must be increased. On the other hand, if the zoom lever ring 14 is placed closer to the image side than the aperture position, space can be secured between the lens and the lens barrel. Therefore, by placing the zoom lever ring 14 at this position, i.e., on the image side relative to the aperture, it is possible to provide the zoom lever ring 14 without increasing the diameter of the lens barrel.

[0071] In this way, in the interchangeable lens 1 of this embodiment, the difference in effective diameter from the front lens to the final lens is effectively utilized to incorporate the zoom lever ring 14, thereby achieving a small diameter.

[0072] [Automatic return mechanism for zoom lever ring] As described above, the zoom lever ring 14 has an automatic return function, and when released after operation, it automatically returns to the neutral point. Below, we will explain the mechanism (automatic return mechanism) for automatically returning the zoom lever ring 14 to the neutral point.

[0073] Fig. 8 is a diagram showing the schematic configuration of the automatic return mechanism, which corresponds to a cross-sectional view of the lens barrel 10 taken along line 8-8 in Fig. 7. Fig. 9 is an exploded perspective view of the zoom lever ring.

[0074] In the interchangeable lens 1 of this embodiment, the automatic return mechanism of the zoom lever ring 14 is realized by three pressure applying units 50 provided on the outer barrel 22. The pressure applying units 50 are structures that generate a force on the zoom lever ring 14 in the direction opposite to the direction in which it is operated.

[0075] Fig. 10 is an exploded perspective view of the pressurized unit. Fig. 11 is a plan view of the pressurized unit. Fig. 12 is a cross-sectional view taken along line 12-12 in Fig. 11. Fig. 13 is a cross-sectional view taken along line 13-13 in Fig. 11.

[0076] The pressurizing unit 50 has a base frame 51, a pair of guide rails 52 provided on the base frame 51, a slider 53 that slides along the guide rails 52, a cam pin 54 provided on the slider 53, and a pair of springs 55 that bias the slider 53.

[0077] Base frame 51 has a rounded rectangular, flat frame shape. Base frame 51 has through holes 51A for fixing pressurizing unit 50 to barrel main body 20 with screws. Through holes 51A are provided in four locations. In this embodiment, base frame 51 is an example of a base member.

[0078] The pair of guide rails 52 are arranged along the longitudinal direction of the base frame 51. The pair of guide rails 52 are provided integrally with the base frame 51.

[0079] The slider 53 moves linearly while being guided by a pair of guide rails 52. The slider 53 moves within the frame of the base frame 51.

[0080] The cam pin 54 has a truncated cone shape and is disposed in the center of the upper surface of the slider 53. The cam pin 54 is provided integrally with the slider 53.

[0081] The pair of springs 55 are disposed in the space between the pair of guide rails 52, with the slider 53 sandwiched between them. The slider 53 is provided with spring fitting portions 53A on both sides in the movement direction of the slider 53. The spring fitting portions 53A are formed of cylindrical convex portions that can fit onto the ends of the springs 55. The base frame 51 is provided with spring fitting portions 51B on both ends of the space between the pair of guide rails 52. The spring fitting portions 51B are formed of cylindrical convex portions that can fit onto the ends of the springs 55. The spring 55 is attached to the base frame 51 by fitting one end of the spring 55 to the spring fitting portion 51B provided on the base frame 51 and fitting the other end to the spring fitting portion 53A provided on the slider 53. The pair of springs 55 attached to the base frame 51 urge the slider 53 in opposite directions. As a result, when the slider 53 moves along the guide rail 52, a force acts on the slider 53 in the direction opposite to the direction of the movement.

[0082] In the pressurizing unit 50 configured as above, the cam pin 54 receives a force in the direction opposite to the direction of movement due to the action of the spring 55, and automatically returns to the neutral point.

[0083] As shown in FIG. 8 , the pressurizing units 50 are disposed at three locations around the outer cylinder 22. The outer cylinder 22 is provided with pressurizing unit mounting portions 60 at three locations on its outer peripheral surface. The pressurizing unit mounting portions 60 are provided with four screw holes 60A corresponding to the four through holes 51A provided in the base frame 51. After the base frame 51 is seated on the pressurizing unit mounting portions 60, the base frame 51 is fixed at four locations with the screws 61, thereby mounting the pressurizing units 50 at predetermined locations on the outer peripheral surface of the outer cylinder 22 in a predetermined orientation. Specifically, the cam pins 54 are mounted so as to move along the optical axis Z.

[0084] 8, the zoom lever ring 14 has cam grooves 62 on its inner periphery. The cam grooves 62 are arranged to correspond to the pressure applying units 50. Therefore, the interchangeable lens 1 of this embodiment is provided with three cam grooves 62. The three cam grooves 62 are provided on the inner periphery of the zoom lever ring 14 at intervals that correspond to the intervals at which the pressure applying units 50 are arranged.

[0085] 14 is a perspective view of a cam groove provided in the zoom lever ring, in which the direction indicated by arrow z is the direction of the optical axis.

[0086] As shown in the figure, the cam groove 62 has an introduction portion 62A and a lead portion 62B. The introduction portion 62A is a portion that guides the cam pin 54 to the lead portion 62B. The introduction portion 62A is arranged along the optical axis Z. The introduction portion 62A is also provided with an open end on the object side. The lead portion 62B is a portion along which the cam pin 54 moves when the zoom lever ring 14 is operated. The lead portion 62B is arranged to intersect obliquely with the optical axis Z. As an example, it is arranged to intersect at an angle of 45 degrees. The length Lc of this lead portion 62B in the optical axis direction is set to be shorter than the movable range of the cam pin 54 in the pressurizing unit 50.

[0087] 15 is a diagram showing the relationship between the operation of the zoom lever ring and the movement of the cam pin. Figure 15(A) shows, in a front view, the movement of the cam pin 54 when the zoom lever ring 14 is operated clockwise (CW). Figure 15(B) shows, in a front view, the movement of the cam pin 54 when the zoom lever ring 14 is operated counterclockwise (CCW).

[0088] As shown in FIG. 1A, when the zoom lever ring 14 is operated clockwise (CW), the cam pin 54 moves along the optical axis toward the object side. When the cam pin 54 moves from the neutral point, it receives a force from the spring 55 in the direction opposite to the direction of movement. As a result, when the zoom lever ring 14 is released, the cam pin 54 moves toward the image side. As the cam pin 54 moves toward the image, the cam groove 62 acts to rotate the zoom lever ring 14 counterclockwise, automatically returning it to the neutral point.

[0089] As shown in FIG. 1B, when the zoom lever ring 14 is operated counterclockwise (CCW), the cam pin 54 moves along the optical axis toward the image side. As described above, when the cam pin 54 moves from the neutral point, it receives a force from the spring 55 in the direction opposite to the direction of movement. As a result, when the zoom lever ring 14 is released, the cam pin 54 moves toward the object side. As the cam pin 54 moves toward the object side, the cam groove 62 acts to rotate the zoom lever ring 14 clockwise, automatically returning it to the neutral point.

[0090] [Zoom lever ring rotation detection mechanism] The rotation direction (operation direction) and rotation angle (operation amount) of the zoom lever ring 14 are detected by a rotation detection unit 64 attached to the outer barrel 22. More specifically, the rotation angle position relative to the neutral point is detected.

[0091] The rotation detection unit 64 has a cam pin that is movable along the optical axis Z and a linear sensor that detects the position of the cam pin. The cam pin is fitted into a sensing cam groove provided on the inner periphery of the zoom lever ring 14. When the zoom lever ring 14 is rotated, the cam pin moves according to the rotation direction and rotation angle (amount of rotation). The linear sensor detects the position of the cam pin relative to a reference point. The reference point is set to the neutral point. The rotation angle position of the zoom lever ring 14 is calculated from the position of the cam pin detected by the linear sensor. The rotation direction and rotation angle of the zoom lever ring 14 are then calculated from this rotation angle position of the zoom lever ring 14. The calculation processing is performed by a processor (e.g., a lens microcomputer) provided in the interchangeable lens 1 or a processor (e.g., a camera microcomputer) of the camera body to which the interchangeable lens 1 is attached.

[0092] Note that the above configuration is just an example, and other mechanisms can also be used to detect the rotation angle position of the zoom lever ring 14. For example, a configuration can be adopted in which a sensor that detects the neutral point and a sensor that detects the rotation angle (amount of rotation) are combined to detect the rotation angle position of the zoom lever ring 14.

[0093] [Zoom Lever Ring Function] As described above, the zoom lever ring 14 is primarily used for zooming. In particular, in the interchangeable lens 1 of this embodiment, it is used for variable-speed zooming. Variable-speed zooming is a function that zooms at a speed that corresponds to the amount of operation. In the interchangeable lens 1 of this embodiment, the zoom speed (angle of view change speed) is set according to the rotation angle (amount of rotation) of the zoom lever ring 14.

[0094] FIG. 16 is a graph showing an example of the relationship between the rotation angle of the zoom lever ring and the zoom speed.

[0095] In the figure, the horizontal axis represents the rotation angle of the zoom lever ring 14. The vertical axis represents the set zoom speed. Note that on the horizontal axis, with the origin O (neutral point) as the reference, the right direction represents the rotation angle on the telephoto side, and the left direction represents the rotation angle on the wide-angle side. Also, on the vertical axis, with the origin O as the reference, the upward direction represents the zoom speed on the telephoto side, and the downward direction represents the zoom speed on the wide-angle side. Also in the figure, ZTmax is the maximum rotation angle on the telephoto side. ZWmax is the maximum rotation on the wide-angle side. STmax is the maximum zoom speed on the telephoto side. SWmax is the maximum zoom speed on the wide-angle side.

[0096] In the interchangeable lens 1 of this embodiment, when viewed from the front, rotating the zoom lever ring 14 counterclockwise CCW zooms in the telephoto direction, and rotating it clockwise CW zooms in the wide-angle direction.

[0097] 16, the set zoom speed increases as the rotation angle of the zoom lever ring 14 increases. In particular, in this embodiment, the set zoom speed increases in a curved manner as the rotation angle of the zoom lever ring 14 increases. This makes it possible to switch between rapid zooming and delicate zooming in a very small speed range, providing good operability.

[0098] 16, in the interchangeable lens 1 of this embodiment, a dead zone DZ is set within a predetermined angle range on the telephoto side and wide angle side with the neutral point (origin O) as the reference point. This prevents minute hand movements, etc., while holding the lens from being transmitted to the zoom lever ring 14, and prevents unintended zooming.

[0099] [Zoom lever ring function switching] As described above, the zoom lever ring 14 is primarily used for zooming (variable-speed zooming), but it can also be used for purposes other than zooming. That is, the function assigned to the zoom lever ring 14 can be switched. The function assigned to the zoom lever ring 14 is switched using the switch button 16. In the interchangeable lens 1 of this embodiment, each time the switch button 16 is pressed, the function assigned to the zoom lever ring 14 is switched between variable-speed zooming and variable-speed focusing. Variable-speed focusing is a function that focuses at a speed corresponding to the amount of operation (a function that moves the focus position at a speed corresponding to the amount of operation). In this embodiment, the focus speed is set according to the rotation angle of the zoom lever ring 14. As with variable-speed zooming, it is preferable to set the focus speed in a curved manner. That is, the focus speed increases in a curved manner as the rotation angle increases. It is also preferable to set a dead zone. In the case of focusing, turning the zoom lever ring 14 counterclockwise moves the focus toward infinity, and turning it clockwise moves the focus toward the closest distance.

[0100] [Interchangeable lens operation] As described above, the interchangeable lens 1 of this embodiment is equipped with the focus ring 12, the zoom ring 13, and the zoom lever ring 14 as operation members. Focus operation of the interchangeable lens 1 is performed using the focus ring 12. Zoom operation of the interchangeable lens 1 is also performed using the zoom ring 13 and the zoom lever ring 14. Normal zoom operation is performed using the zoom ring 13. That is, zooming according to the amount of rotation is performed using the zoom ring 13. On the other hand, variable speed zoom is performed using the zoom lever ring 14. That is, zooming is performed with the zoom speed changing according to the angle of rotation. The function assigned to the zoom lever ring 14 can be switched using the switch button 16 provided on the button operation unit 15. Each time the switch button 16 is pressed, the function assigned to the zoom lever ring 14 switches between variable speed zoom and variable speed focus. The button operation unit 15 is further equipped with a zoom button 17 for constant speed zoom operation.

[0101] As described above, the interchangeable lens 1 of this embodiment has, in addition to the zoom ring 13, the zoom lever ring 14 and the zoom button 17 as zoom operation members, and can perform zoom operations different from normal. In other words, variable speed zoom and constant speed zoom operations can be performed. This provides good operability for zooming. In particular, good operability can be applied to video shooting.

[0102] Furthermore, the zoom lever ring 14 can be assigned different functions using the switching button 16, so that good operability can be provided for operations other than zooming.

[0103] In the interchangeable lens 1 of this embodiment, the zoom lever ring 14 and the button operation unit 15 are arranged adjacent to each other. This layout provides the following effect: The button operation unit 15 is equipped with a button (switching button 16) that switches the settings of the zoom lever ring 14, and by arranging the two adjacent to each other, functions can be set and operated using only the fingertips while holding the camera.

[0104] Here, "adjacent" does not necessarily mean "close to" the zoom lever ring 14 and the button operation unit 15. It is sufficient that the zoom lever ring 14 and the button operation unit 15 are positioned so that the fingers (thumb) can touch each other simply by moving the fingers (thumb) while maintaining the position of the hand holding the interchangeable lens 1.

[0105] Furthermore, in the interchangeable lens 1 of this embodiment, the button operation unit 15 has a convex portion 15A, and the height of this convex portion 15A is higher than the height of the protrusion 14R of the zoom lever ring 14, which provides the following effect: When gripping the protrusion 14R to operate the zoom lever ring 14, the finger comes into contact with the convex portion 15A of the button operation unit 15. For this reason, it is possible to confirm that only the zoom lever ring 14 has been operated without having to visually check the position of the zoom lever ring 14.

[0106] Furthermore, in the interchangeable lens 1 of this embodiment, the fixed ring portion 42A is disposed adjacent to the zoom lever ring 14. Therefore, this fixed ring portion 42A also makes it possible to confirm that only the zoom lever ring 14 has been operated. In particular, in the interchangeable lens 1 of this embodiment, the fixed ring portion 42A has a larger outer diameter than the zoom lever ring 14, making it easier to determine that only the zoom lever ring 14 has been operated. Furthermore, this fixed ring portion 42A can prevent the zoom ring 13 from being operated at the same time.

[0107] Furthermore, in the interchangeable lens 1 of this embodiment, both ends of the convex portion 15A of the button operation unit 15 and both ends of the protrusion 14R of the zoom lever ring 14 are formed as slopes, and are arranged in parallel. This provides the following effect: The amount of misalignment of the slopes that occurs when the zoom lever ring 14 is operated can be sensed with the touch of a finger, and the amount of operation of the zoom lever ring 14 can be intuitively grasped from the amount of misalignment without having to visually check the zoom lever ring 14.

[0108] Furthermore, in the interchangeable lens 1 of this embodiment, the zoom lever ring 14 is disposed adjacent to the zoom ring 13. This makes it easier to operate the zoom using both. In other words, a good zoom operation environment can be provided. Normally, a user will not simultaneously perform a focus operation (manual focus) using the focus ring 12 and a zoom operation using the zoom ring 13. This is because the focus position is automatically tracked by zooming. Therefore, it is preferable to dispose the zoom ring 13 and the zoom lever ring 14 adjacent to each other. This makes it possible to provide a good zoom operation environment.

[0109] On the other hand, it is preferable to place a fixed ring portion 42A as a separator between the zoom ring 13 and the zoom lever ring 14. This makes it possible to confirm that only the zoom lever ring 14 has been operated without visually checking, as described above.

[0110] In this way, it is preferable to place the zoom lever ring 14 adjacent to the button operation unit 15 and the zoom ring 13. Therefore, it is preferable to place the zoom lever ring 14 between the zoom ring 13 and the button operation unit 15. In particular, in the interchangeable lens 1 of this embodiment, the button operation unit 15 is also provided with the zoom button 17, so this layout can provide a better zoom operation environment.

[0111] Furthermore, by arranging the focus ring 12 adjacent to the zoom ring 13, just like in a general interchangeable lens, that is, an interchangeable lens without the zoom lever ring 14, it is possible to provide the same operating environment as a general interchangeable lens. This makes it possible to add new functions without creating a sense of incongruity. In particular, in the interchangeable lens 1 of this embodiment, the fixed ring portion 42A is arranged between the zoom ring 13 and the zoom lever ring 14, making it easy to distinguish between the general operating system and the special operating system.

[0112] Furthermore, in the interchangeable lens 1 of this embodiment, the zoom lever ring 14 has the protrusions 14R and 14L, which provides the following effect: By making the shape different from that of a normal operation ring, i.e., a typical zoom ring or focus ring without protrusions, it can be intuitively recognized as an operation member with a different function.

[0113] Furthermore, in the interchangeable lens 1 of this embodiment, the zoom lever ring 14 has the smallest diameter of all the operation rings, which provides the following effect. That is, the zoom lever ring 14 is designed for ease of use by being constantly operated by the user's fingertip during shooting. To achieve comfortable operation with the fingertip, it is preferable that the zoom lever ring 14 has the smallest diameter of all the operation rings provided on the interchangeable lens. That is, by configuring the zoom lever ring 14 with the smallest diameter of all the operation rings provided on the interchangeable lens, good operability can be achieved.

[0114] In this regard, in the interchangeable lens 1 of this embodiment, the diameter of the zoom lever ring 14 is reduced by locating the zoom lever ring 14 closer to the image side than the aperture position. That is, as described above, an interchangeable lens can ensure a larger radial space on the image side than on the object side relative to the aperture position. Therefore, by locating the zoom lever ring 14, including the automatic return mechanism, closer to the image side than the aperture position, the zoom lever ring 14 can be incorporated compactly without increasing the diameter of the lens barrel 10.

[0115] Furthermore, locating the zoom lever ring 14 closer to the image than the aperture position provides the following effect. That is, locating the zoom lever ring 14 closer to the image than the aperture position results in the zoom lever ring 14 being located closer to the camera body. Generally, with interchangeable lens cameras, a user holds the grip of the camera body with their right hand and supports the camera body with the palm of their left hand while shooting. The zoom lever ring 14 is an operating member primarily used for variable-speed zooming, which is primarily used for video shooting. When using variable-speed zooming for video shooting, the zoom lever ring 14 is always operated with a finger placed on it. Therefore, locating the zoom lever ring 14 closer to the camera body provides excellent operability during video shooting. In particular, with the interchangeable lens 1 of this embodiment, the zoom lever ring 14 is located closest to the image among multiple operating rings. Therefore, the zoom lever ring 14 can be operated with the fingertips of the left hand while supporting the camera body in the palm of the left hand. This allows the camera to be held and operated securely, even during handheld shooting.

[0116] [Variations] [Zoom lever ring shape] In the above embodiment, the zoom lever ring is shaped like a ring with a protrusion, but the shape of the zoom lever ring is not limited to this. It may be shaped like a ring without a protrusion. It may also be shaped like a C-ring with a cutout.

[0117] In the above embodiment, the zoom lever ring is provided with a pair of protrusions, but the protrusions may be provided in only one location. In this case, it is preferable to provide them on the button operation unit side. Also, the protrusions may be provided in three or more locations.

[0118] In consideration of operability, it is preferable that the zoom lever ring be configured so that it can be operated with two fingers. Therefore, it is preferable that protrusions are provided in two locations. The two locations are preferably diagonally positioned and horizontal at the neutral point.

[0119] [Button operation section] In the above embodiment, the button operation unit is provided on the protrusion, but it may also be provided on the arcuate surface of the outer periphery of the lens barrel. Also, the protrusion may not have a button operation unit. In other words, it may have only a protrusion without a button.

[0120] [Automatic return mechanism] In the above embodiment, the automatic return mechanism for the zoom lever ring is configured using a pressure unit, but the configuration of the automatic return mechanism for the zoom lever ring is not limited to this. Other configurations can also be used. For example, a configuration in which a pair of springs arranged in the circumferential direction holds the zoom lever ring at a neutral point can be used. In this case, for example, one end of the spring is fixed to the zoom lever ring, and the other end is fixed to the lens barrel main body or an exterior body fixedly attached to the lens barrel main body.

[0121] Note that an automatic return mechanism using a pressure unit, such as in the interchangeable lens of the above embodiment, has the following advantages. That is, by arranging the spring along the optical axis direction and using a cam pin and cam groove to change the biasing direction, the unit can be made thinner. This allows the diameter of the zoom lever ring to be reduced. Furthermore, by making it a unit, assembly can be made easier. In particular, the interchangeable lens of the above embodiment is configured so that the pressure unit is assembled to the outer periphery of the outer barrel, which makes assembly easier. Note that in the above embodiment, the pressure unit is fixed to the outer barrel with screws, but the structure for fixing the pressure unit is not limited to this. Alternatively, for example, the pressure unit can be attached to the outer barrel using a structure such as a snap fit.

[0122] It is also possible to configure the lens barrel so that the function of the pressurizing unit is directly incorporated into the lens barrel, rather than as a separate unit. That is, the function of base frame 51 can be realized by the outer periphery of outer barrel 22, and cam pin 54 can be directly held movably by outer barrel 22. In this case, outer barrel 22 is provided with a guide rail that guides the movement of cam pin 54. Also, spring 55 that biases cam pin 54 is attached directly to outer barrel 22.

[0123] The following mechanism can also be used to guide the cam pin and hold the spring: The cam pin can be supported slidably along a guide shaft, and a spring can be attached to the guide shaft to bias the cam pin.

[0124] Furthermore, grease (for example, high viscosity grease) may be applied to the spring that biases the cam pin to provide damping properties.

[0125] In addition, in the automatic return mechanism of the above embodiment, the cam pin, which is movable along the optical axis direction, is biased by a pair of springs from both sides in the optical axis direction to hold it at the neutral point, but it can also be configured to bias it in one direction with a single spring to hold it at the neutral point. In this case, for example, a V-shaped cam groove is provided on the inner peripheral surface of the zoom lever ring.

[0126] Furthermore, in a configuration in which a pair of springs biases the cam pin from both sides in the optical axis direction, multiple sets of springs may be used to bias the cam pin. That is, as long as the biasing forces from both sides are balanced, any combination of springs may be used. Therefore, one side may be biased by one spring and the other by a combination of two springs. In this case, for example, three springs may be arranged on each side of a Y shape, and the other side may be biased by two springs and one spring.

[0127] Furthermore, the spring may be arranged in the circumferential direction, that is, the cam pin may be biased in the circumferential direction by the spring arranged in the circumferential direction, so that the cam pin automatically returns to the neutral point.

[0128] In addition, in the above embodiment, the pressurizing units are arranged at three locations in the circumferential direction, but the number of pressurizing units arranged is not limited to this. They may be arranged at only one location in the circumferential direction. In other words, one pressurizing unit may constitute an automatic return mechanism. They may also be arranged at two locations in the circumferential direction, or at multiple locations such as four or more locations.

[0129] Note that when an automatic return mechanism is configured using multiple pressure units, the following effect is achieved. That is, by combining and using pressure units incorporating springs with different spring constants, the reaction force received during operation can be adjusted. For example, prepare a pressure unit incorporating a spring with a standard spring constant, a pressure unit incorporating a spring with a spring constant weaker than the standard, and a pressure unit incorporating a spring with a spring constant stronger than the standard. In this case, 27 different (3 x 3 x 3) different operation reaction forces can be set. Note that this effect can also be achieved by simply replacing the springs. Furthermore, it is sufficient that the pressure unit is replaceable in at least one location. In other words, it is sufficient that the force acting on the zoom lever ring can be adjusted in at least one location.

[0130] Furthermore, the position of the pressure applying unit is not particularly limited, but if the zoom lever ring has a protrusion, it is preferable to place the pressure applying unit at a position different from the position of the protrusion. The position of the protrusion on the zoom lever ring is the position where the protrusion is located when the zoom lever ring is positioned at the neutral point. In the case of the interchangeable lens 1 of the above-described embodiment, as shown in FIG. 8 , when the zoom lever ring 14 is positioned at the neutral point, the two protrusions 14R and 14L are positioned horizontally. When the zoom lever ring 14 is positioned at the neutral point, the position where one protrusion 14R is located is defined as the 0° position, and the position where the other protrusion 14L is located is defined as the 180° position. The pressure applying unit 50 is positioned to avoid the 0° and 180° positions. In other words, the pressure applying unit 50 is positioned at a position that is not in phase with the protrusions 14R and 14L in the circumferential direction of the lens barrel 10. As described above, the protrusions 14R and 14L of the zoom lever ring 14 function as grips when operating the zoom lever ring 14. By positioning the pressure applying unit 50 away from the positions of the protrusions 14R, 14L, it is possible to prevent the movement of the cam pin from being hindered when, for example, the protrusions 14R, 14L are gripped tightly. In other words, if the pressure applying unit is positioned at the same position as the protrusions, there is a risk that a force will act to press down on the cam pin from the outer diameter direction when, for example, the protrusions are gripped tightly and the zoom lever ring 14 is deformed. This can be prevented by positioning the pressure applying unit away from the positions of the protrusions.

[0131] As mentioned above, it is preferable that the zoom ring has protrusions in two locations, and therefore it is preferable that the pressure applying units be disposed in one or three locations that avoid the positions of the two protrusions.

[0132] Furthermore, it is preferable to place the pressure applying unit between the lens barrel main body and the zoom lever ring in a plane perpendicular to the optical axis. Since it is between the lens barrel main body and the zoom lever ring, the pressure applying unit is placed radially outward of the lens that is located at least closer to the image side than the aperture position. It is also placed radially inward of the zoom lever ring. Note that by assembling the pressure applying unit 50 onto the outer peripheral surface of the outer barrel 22, as in the interchangeable lens 1 of the above embodiment, the assembly work can be made easier.

[0133] Incidentally, by using a dual-layer structure for the lens barrel body, as in the interchangeable lens 1 of this embodiment, the following effect is achieved. That is, by separating the inner barrel 21 that holds the lens from the outer barrel 22 to which the operation ring is attached, it is possible to prevent vibrations caused by operating the operation ring from being transmitted to the lens. In particular, with regard to the zoom lever ring 14, which has an automatic return function using a spring, it is possible to prevent vibrations generated when operating this ring from being transmitted to the lens.

[0134] Furthermore, in the above embodiment, the pressure applying unit is located on the barrel main body side, and the cam groove is provided on the zoom lever ring side, but this relationship may be reversed. That is, the pressure applying unit may be attached to the zoom lever ring side, and the cam groove may be located on the barrel main body side, specifically, on the outer peripheral surface of the outer cylinder.

[0135] [Operation ring on the lens barrel] In the interchangeable lens 1 of the above embodiment, the lens barrel is provided with three operation rings (focus ring, zoom ring, and zoom lever ring), but the number and type of operation rings provided on the lens barrel are not limited to this. It is sufficient to provide at least a zoom lever ring. Therefore, for example, in addition to a configuration with only a zoom lever ring, it is also possible to adopt a configuration with only a zoom lever ring and a zoom ring, or a configuration with only a zoom lever ring and a focus ring. Furthermore, an aperture ring may be provided instead of or in addition to the focus ring and / or zoom ring.

[0136] As mentioned above, when multiple operation rings are provided, it is preferable that the zoom lever ring has the smallest diameter. Note that "smallest" also includes cases where there are multiple operation rings with the smallest diameters. For example, when a focus ring, zoom ring, and zoom lever ring are provided, if the outer diameters of the zoom ring and zoom lever ring are the same and smaller than the outer diameter of the focus ring, the zoom lever ring and zoom ring will have the smallest diameters. Also, cases where the outer diameters of all operation rings are the same are also included in the example where the zoom lever ring has the smallest diameter.

[0137] Furthermore, in the interchangeable lens 1 of the above embodiment, a fixed portion (fixed ring portion 42A) is disposed between the zoom ring 13 and the zoom lever ring 14, but it is also possible to configure the interchangeable lens 1 so that no fixed portion is disposed between the operation rings. In other words, it is also possible to configure the interchangeable lens 1 so that multiple operation rings are disposed consecutively.

[0138] [Zoom lever ring usage] The zoom lever ring can also be used for purposes other than variable speed zooming. For example, in relation to zooming operations, it can be used for purposes other than the variable speed zooming, such as constant speed zooming, switching the rotation direction of the zoom ring, zoom limiting, and zoom presetting.

[0139] Here, constant speed zoom refers to the function of zooming at a constant speed, as described above. In this case, zooming occurs at a constant speed in the direction of operation of the zoom lever ring, regardless of the amount of operation (rotation angle) of the zoom lever ring.

[0140] Switching the rotation direction of the zoom ring refers to the function of switching the rotation direction of the zoom ring and the zoom direction. In this case, for example, the direction in which the zoom lever ring is operated determines the operation direction in the telephoto direction. Therefore, for example, when the zoom lever ring is operated clockwise, the clockwise direction of the zoom ring determines the operation direction in the telephoto direction. On the other hand, when the zoom lever ring is operated counterclockwise, the counterclockwise direction of the zoom ring determines the operation direction in the telephoto direction.

[0141] The zoom limit is a function that limits the zoom range. In this case, for example, when the zoom lever ring is operated in one direction, the zoom limit function is turned on, and when it is operated in the other direction, the zoom limit function is turned off.

[0142] Zoom preset is a function that zooms to a predetermined zoom position at a predetermined speed. In this case, for example, the zoom preset function is turned on each time the zoom lever ring is operated in one direction. Note that it is also possible to configure the camera so that two zoom positions can be preset when the zoom lever ring is operated in one direction and when it is operated in the other direction.

[0143] In addition, as a focus function, in addition to the variable speed focus of the above embodiment, it can be used for constant speed focus, focus preset, seamless switching between continuous AF (Auto Focus) and manual focus, etc.

[0144] Here, constant speed focus is a function for focusing at a constant speed (a function for moving the focal position at a constant speed). In this case, focusing is performed at a constant speed regardless of the rotation angle. In other words, the focal position moves.

[0145] Focus preset is a function that focuses at a pre-specified focus position at a pre-specified speed. In this case, for example, the focus preset function is turned on each time the zoom lever ring is operated in one direction. Note that it is also possible to configure the camera so that two focus positions can be preset when the zoom lever ring is operated in one direction and when it is operated in the other direction.

[0146] Seamless switching between continuous AF and manual focus is a function that allows a seamless transition between continuous AF and manual focus. In this case, when the zoom lever ring is operated during continuous AF, the camera seamlessly transitions from continuous AF to manual focus operation using the zoom lever ring.

[0147] The control of the interchangeable lens may be performed by a processor (for example, a lens microcomputer) provided in the interchangeable lens, or by a processor (for example, a camera microcomputer) in the camera body to which the interchangeable lens is attached. The control of the interchangeable lens includes focus control, zoom control, aperture control, etc.

[0148] [Other embodiments] In the above embodiment, the present invention has been described as being applied to an interchangeable lens of an interchangeable lens camera, but the application of the present invention is not limited to this. The present invention can also be applied to a lens device of a camera in which the lens device is integrally assembled with the camera body (a so-called integrated lens camera).

[0149] Furthermore, the type of camera in which the lens device is used is not particularly limited, and the lens device can be used in various cameras such as television cameras, cine cameras, video cameras, etc. Furthermore, the lens device can also be used for purposes other than cameras. [Explanation of symbols]

[0150] 1 interchangeable lens 10. Lens barrel 11 Mount 12 Focus ring 13 Zoom ring 14 Zoom Lever Ring 14L protrusion 14Ls slope 14R protrusion 14Rs Slope 15 Button operation section 15A convex part 15As Slope 16 Switch button 17 Zoom button 17T Zoom Tele Button 17W Zoom Wide button 20 Lens barrel body 21 Inner cylinder 22 Outer cylinder 23 First lens frame 24 Second lens frame 25 Guide shaft 26 Zoom motor 27 Lead screw 28 Nut 29 Third lens frame 30 Fourth lens frame 31 Main shaft 32 Secondary shaft 33 Fifth lens frame 40 Exterior body 41 Front cover 42 Mid Cover 42A Fixed ring part 43 Rear cover 50 pressurized unit 51 base frame 51A through hole 51B Spring fitting part 52 guide rail 53 Slider 53A Spring fitting part 54 Campin 55 Spring 60 Pressurized unit mounting section 60A screw hole 61 screws 62 Cam groove 62A Cam groove introduction 62B Cam groove lead 64 Rotation detection unit L1 First lens group L2 Second lens group L3: Third lens group L4 4th lens group L5 Fifth lens group S aperture SU Aperture Unit Z optical axis

Claims

1. The lens barrel and a first operating ring provided on the outer periphery of the lens barrel and rotated in the circumferential direction of the lens barrel; a structure including a cam pin supported movably along the optical axis direction and a spring that biases the cam pin in the optical axis direction, the cam pin fitting into a cam groove provided in the first operation ring to generate a force in a direction opposite to the operation direction of the first operation ring; wherein the first operation ring and the structure are disposed on the image side of a position of a diaphragm disposed in the lens barrel. Lens device.

2. The structure includes at least a pair of springs that urge the cam pin in opposite directions across the cam pin. The lens device according to claim 1 .

3. the structure includes a base member detachably attached to the lens barrel, the cam pin is movably supported by the base member, and the spring is held by the base member; 3. The lens device according to claim 1.

4. The first operating ring is rotated within a specific angle range. The lens device according to claim 1 .

5. The structure automatically returns the first operating ring to a specific position. The lens device according to claim 1 .

6. The structures are arranged at a plurality of locations in the circumferential direction. The lens device according to claim 1 .

7. The structure is capable of adjusting the force applied to the first operating ring at at least one location. The lens device according to claim 6 .

8. the structure is disposed between the lens barrel and the first operation ring; The lens device according to any one of claims 1 to 7.

9. the structure is disposed radially outward of a lens disposed closer to the image side than the position of the diaphragm, and is disposed radially inward of the first operation ring; The lens device according to any one of claims 1 to 8.

10. The lens barrel is a first lens barrel that holds a lens; a second lens barrel that holds the first lens barrel; the first operation ring and the structure are provided on the second lens barrel. The lens device according to any one of claims 1 to 9.

11. the lens barrel includes a plurality of operation rings including the first operation ring on an outer periphery of the lens barrel, The operation ring other than the first operation ring is at least one of a zoom ring, a focus ring, and an aperture ring, The first operating ring has the smallest diameter among the plurality of operating rings. The lens device according to any one of claims 1 to 10.

12. the first operation ring is disposed closest to the image side among the plurality of operation rings; The lens device according to claim 11.

13. the lens barrel includes a first convex portion having an arc shape extending along the circumferential direction on at least a part of an outer periphery of the lens barrel, the first operating ring is disposed adjacent to the first protrusion; The lens device according to any one of claims 1 to 12.

14. the height of the first protrusion in the outer diameter direction of the lens barrel is relatively greater than the height of the first operation ring; The lens device of claim 13.

15. the first convex portion includes an operation member for performing settings related to the first operation ring, and is disposed closer to the image side than the first operation ring.

15. A lens device according to claim 13 or 14.

16. the first operation ring includes a second convex portion having an arc shape extending along a circumferential direction on at least a part of an outer periphery of the first operation ring; 16. A lens device according to any one of claims 1 to 15.

17. the first operation ring includes a second convex portion having an arc shape extending along a circumferential direction on a part of an outer periphery of the first operation ring, the second protrusion is disposed at a position different from a position of the structure in the circumferential direction; The lens device of claim 16.

18. the first operation ring is used for zooming operations; 18. A lens device according to any one of claims 1 to 17.

19. a mount is provided at an end of the lens barrel on the image side; 19. A lens device according to any one of claims 1 to 18.

Images