Lens device

Abstract

To provide a lens device that can be reduced in size in the radial direction compared with conventional techniques.SOLUTION: A lens device comprises: a first lens; a first operation ring that is provided to be rotatable in a direction around an optical axis; a cam cylinder that is connected to the first operation ring and moves the first lens along the optical axis; and a first sensor that is provided at an end in the axial direction of the cam cylinder and detects an amount of rotation of the first operation ring.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The technology of the present disclosure relates to a lens device. [Background technology]

[0002] Patent document 1 discloses a lens barrel that can be attached to a camera body and includes a lens element, a lens support frame that supports the lens element, an actuator that is a unit fixed to the lens support frame and has a drive shaft and a detection unit for detecting rotation of the drive shaft, and an electrical contact unit that is arranged on the opposite side of the actuator to the lens element when viewed from an optical axis direction parallel to the optical axis of the lens element and can be electrically connected to the camera body.

[0003] Patent document 2 discloses a sensor mounting structure for a lens barrel comprising a lens barrel body that holds a lens, an operating ring that is arranged on the outer periphery of the lens barrel body and held so as to be rotatable in a circumferential direction relative to the lens barrel body, a detection sensor that is provided on the outer periphery of the lens barrel body and detects the operating state of the operating ring, and a sensor support member that supports the detection sensor, wherein the sensor support member is an arc-shaped member that is provided in the circumferential direction of the outer periphery of the lens barrel body only in the arc-shaped area where the detection sensor is arranged, and supports the detection sensor so as to face the inner periphery of the operating ring.

[0004] Patent document 3 discloses a lens position detection device that detects the position of a lens that is movable relative to a fixed frame, and includes: a first sheet coil provided on a lens frame that holds the lens or on a movable part that moves in conjunction with the movement of the lens frame; a second sheet coil provided on a fixed part that faces the first sheet coil; one of the first sheet coil and the second sheet coil serving as an excitation coil and the other serving as a detection coil, an excitation circuit that provides an excitation signal to the excitation coil; and a signal processing circuit that detects the position of the lens from an electrical signal output from the detection coil in accordance with the moving position of the first sheet coil as the lens frame moves, while maintaining a facing distance from the second sheet coil in a plane parallel to the second sheet coil.

[0005] Patent Document 4 discloses a first member provided with a photoreflector having a light emitting portion and a light receiving portion, and a second member that moves relative to the first member and has a convex portion that protrudes curvedly and a concave portion that is recessed curvedly alternately provided at regular intervals on a surface facing the photoreflector, and a movement amount detection device that detects the amount of movement of the second member relative to the first member.

[0006] Patent Document 5 discloses a lens barrel including a diaphragm portion whose aperture diameter can be changed, a fixed cylinder portion that houses the diaphragm portion, and a diaphragm ring that is rotatably attached to the fixed cylinder portion and configured to be able to adjust the aperture diameter of the diaphragm portion. When a portion of the diaphragm ring facing the fixed cylinder portion or a portion of the fixed cylinder portion facing the diaphragm ring is defined as a "first facing portion", and a portion of the fixed cylinder portion facing the first facing portion or a portion of the diaphragm ring facing the first facing portion is defined as a "second facing portion", first and second protrusion portions arranged at two locations along the circumferential direction of the diaphragm portion so as to be biased from the diaphragm portion toward the diaphragm ring side, a fitting portion formed on the diaphragm ring side such that the first and second protrusion portions are selectively fitted therein according to the rotational position of the diaphragm ring and the diaphragm ring rotates integrally with the diaphragm portion, a connection release portion configured to release the fitting of the first and second protrusion portions into the fitting portion and allow the diaphragm ring to rotate in a state of being separated from the diaphragm portion, and a click mechanism formed or arranged at the first facing portion and the second facing portion so as to impart a click feeling to the rotation of the diaphragm ring. The click mechanism includes a click spring member attached to the first facing portion, a locking member biased toward the second facing portion side by the click spring member, and a locked portion formed or arranged on the second facing portion side so as to lock the locking member. The second facing portion has a locked surface formed with a plurality of locked portions in the circumferential direction and a substantially flat surface having no such locked portion. The locking member is configured to slide on the locked surface when the diaphragm ring is rotated with the first protrusion portion fitted into the fitting portion, and to slide on the substantially flat surface when the diaphragm ring is rotated with the second protrusion portion fitted into the fitting portion.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

[0008] One embodiment of the technology according to the present disclosure provides a lens device that can be miniaturized in the radial direction as compared with the prior art.

Means for Solving the Problems

[0009] The first aspect of the technology according to the present disclosure is a lens device including a first lens, a first operation ring rotatably provided in a direction around an optical axis, a cam cylinder connected to the first operation ring and moving the first lens along the optical axis, and a first sensor provided at an axial end of the cam cylinder and detecting a rotation amount of the first operation ring.

[0010] The second aspect of the technology according to the present disclosure is the lens device according to the first aspect, wherein the cam cylinder has a plurality of grooves, and the end portion is located in a region on the imaging side with respect to the groove located on the most imaging side among the grooves.

[0011] The third aspect of the technology according to the present disclosure is the lens device according to the first aspect or the second aspect, wherein the first sensor includes a first substrate member provided in an arc shape along the circumferential direction of the cam cylinder, and a first movable member connected to the cam cylinder and movably attached to the first substrate member.

[0012] A fourth aspect of the technology according to the present disclosure is a lens device in the lens device according to the third aspect, wherein the first movable member is provided on the outer peripheral side of the first substrate member.

[0013] A fifth aspect of the technology according to the present disclosure is a lens device in the lens device according to the fourth aspect, comprising a first cylindrical member provided on the inner side in the radial direction of the cam cylinder, and the first substrate member is fixed to the outer peripheral surface of the first cylindrical member.

[0014] A sixth aspect of the technology according to the present disclosure is a lens device in the lens device according to the fifth aspect, wherein the first substrate member is a member having a thickness in the radial direction of the first cylindrical member.

[0015] A seventh aspect of the technology according to the present disclosure is a lens device in the lens device according to the fifth or sixth aspect, comprising a second cylindrical member provided on the outer side in the radial direction of the cam cylinder, the second cylindrical member is located on the imaging side with respect to the cam cylinder, has an opposing wall facing the cam cylinder in the direction of the optical axis, a first region is provided between the cam cylinder and the opposing wall, and the first sensor is disposed in the first region.

[0016] An eighth aspect of the technology according to the present disclosure is a lens device in the lens device according to any one of the first to seventh aspects, wherein the first sensor is a resistive linear position sensor.

[0017] A ninth aspect of the technology according to the present disclosure is a lens device in the lens device according to any one of the first to eighth aspects, wherein the first lens is a zoom lens and the first operation ring is a zoom ring.

[0018] A tenth aspect of the technology according to the present disclosure is a lens device in the lens device according to any one of the first to ninth aspects, comprising a diaphragm, a second operation ring rotatably provided around the optical axis and connected to the diaphragm, and a second sensor provided on the outer side in the radial direction of the cam cylinder for detecting the rotation amount of the second operation ring.

[0019] An eleventh aspect of the technique of the present disclosure is a lens device according to the tenth aspect, wherein the second sensor has a second substrate member arranged in an arc shape along the circumferential direction of the cam barrel, and a second movable member connected to the second operating ring and attached so as to be movable relative to the second substrate member.

[0020] A twelfth aspect of the technique of the present disclosure is the lens device according to the eleventh aspect, wherein the second movable member is provided on the inner periphery side of the second substrate member.

[0021] A thirteenth aspect of the technique of the present disclosure is a lens device according to the twelfth aspect, further comprising a second barrel member provided radially outside the cam barrel, and the second substrate member is fixed to the inner circumferential surface of the second barrel member.

[0022] A fourteenth aspect according to the technique of the present disclosure is the lens device according to the thirteenth aspect, wherein the second substrate member is a member having a plate thickness in a radial direction of the second barrel member.

[0023] A fifteenth aspect of the technique of the present disclosure is a lens device according to the thirteenth or fourteenth aspect, further comprising a second lens and a movable member that moves the second lens along the optical axis, wherein the second cylindrical member has a first diameter portion having a first diameter and a second diameter portion having a second diameter, the movable member is provided inside the first diameter portion, the second diameter portion is located on the image-forming side relative to the movable member, a second region is provided between the image-forming side end of the movable member and the second diameter portion, and the second sensor is disposed in the second region.

[0024] A sixteenth aspect of the technique of the present disclosure is a lens device according to any one of the tenth to fifteenth aspects, wherein the second sensor is arranged on the objective side relative to the second operating ring.

[0025] A seventeenth aspect of the technique of the present disclosure is the lens device according to any one of the tenth to sixteenth aspects, in which the second sensor is a resistive linear position sensor.

[0026] An 18th aspect of the technique of the present disclosure is a lens device according to any one of the 10th to 17th aspects, further comprising a click mechanism that provides a clicking sensation upon rotation of the second operating ring.

[0027] A 19th aspect of the technology of the present disclosure is a lens device according to the 18th aspect, wherein the click mechanism is formed in the second operating ring and has a plurality of recesses aligned in the direction of rotation of the second operating ring, a convex member that selectively engages with the plurality of recesses in accordance with the rotation of the second operating ring, and a biasing member that biases the convex member toward the plurality of recesses. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a side view of a lens device according to an embodiment of the disclosed technique. [Diagram 2] FIG. 2 is a vertical cross-sectional view of the lens device. [Diagram 3] 2 is a side view of a cam barrel assembly including a cam barrel, a first linear sensor, and a substrate. FIG. [Figure 4] FIG. 2 is a perspective view of a first linear sensor. [Figure 5] FIG. 2 is a cross-sectional view of the lens device. [Figure 6] FIG. 4 is a perspective view of a second linear sensor. [Figure 7] 4 is a longitudinal cross-sectional view of an outer barrel assembly including an outer barrel, an aperture ring, and a second linear sensor. FIG. [Figure 8] FIG. 4 is a perspective view of an aperture ring and a second linear sensor. [Figure 9] FIG. 4 is a perspective view of an aperture ring and a second linear sensor. [Figure 10] FIG. [Figure 11] 1 is an exploded perspective view of a rear cover assembly including a rotating member, a rear cover, a slide switch, a connecting member, and a first click mechanism. FIG. [Figure 12] FIG. [Figure 13]It is an enlarged perspective view of the peripheral portion of the opening in the rotating member. [Figure 14] It is a perspective view of the rear cover assembly, showing the first state in which the slide switch has moved to the first moving position. [Figure 15] It is a longitudinal sectional view of the outer cylinder-rear cover assembly including the outer cylinder, the aperture ring, the rotating member, the rear cover, and the first click mechanism, showing the first state. [Figure 16] It is an enlarged longitudinal sectional view of the peripheral portion (portion X) of the first click mechanism in the outer cylinder-rear cover assembly, showing the first state. [Figure 17] It is a perspective view of the rear cover assembly, showing the second state in which the slide switch has moved to the second moving position. [Figure 18] It is a longitudinal sectional view of the outer cylinder-rear cover assembly, showing the second state. [Figure 19] It is an enlarged longitudinal sectional view of the peripheral portion (portion X) of the first click mechanism in the outer cylinder-rear cover assembly, showing the second state. [Figure 20] It is a front view of the rear cover. [Figure 21] It is an enlarged perspective view of the peripheral portion of the second click mechanism in the outer cylinder-rear cover assembly. [Figure 22] It is an enlarged longitudinal sectional view of the peripheral portion of the second click mechanism in the outer cylinder-rear cover assembly. [Figure 23] It is an enlarged perspective view of the outer peripheral surface of the outer cylinder-rear cover assembly.

Mode for Carrying Out the Invention

[0029] Hereinafter, an example of the lens device 10 according to an embodiment of the technology of the present disclosure will be described with reference to the accompanying drawings. In the following, there may be cases where the description is made over a plurality of drawings.

[0030] As shown in FIG. 1, the lens device 10 according to the present embodiment is a lens device applicable to various cameras such as digital still cameras. The arrow A1 side indicates the object side, and the arrow A2 side indicates the imaging side. The lens device 10 has an optical axis OA. In the following description, the direction of the optical axis OA (hereinafter referred to as the "optical axis direction") refers to a direction parallel to the optical axis OA. Also, the direction around the optical axis OA (hereinafter referred to as the "direction around the optical axis") refers to a circumferential direction centered on the optical axis OA.

[0031] The lens device 10 includes a lens hood 12, an outer cylinder 14, a focus ring 16, a zoom ring 18, a diaphragm ring 20, a rear cover 22, and a mount 24. The lens hood 12 is disposed on the object side of the outer cylinder 14, and the rear cover 22 is disposed on the imaging side of the outer cylinder 14. The mount 24 is disposed at the imaging-side end of the rear cover 22.

[0032] The lens hood 12 has a hood portion 26. The focus ring 16, the zoom ring 18, and the diaphragm ring 20 are disposed between the hood portion 26 and the rear cover 22. The focus ring 16, the zoom ring 18, and the diaphragm ring 20 are arranged in the order of the focus ring 16, the zoom ring 18, and the diaphragm ring 20 from the object side toward the imaging side.

[0033] The focus ring 16, the zoom ring 18, and the diaphragm ring 20 are provided rotatably about the optical axis with respect to the outer cylinder 14. Specifically, the focus ring 16, the zoom ring 18, and the diaphragm ring 20 are formed in an annular shape along the direction around the optical axis. The focus ring 16, the zoom ring 18, and the diaphragm ring 20 are disposed on the outer side in the radial direction of the outer cylinder 14 and are rotatably supported about the optical axis with respect to the outer cylinder 14.

[0034] 2, the lens device 10 includes a plurality of lenses 28 and an aperture 30. The plurality of lenses 28 are classified into, for example, a first group G1, a second group G2, a third group G3, and a fourth group G4. The lenses 28 in the first group G1 are, for example, objective lenses, the lenses 28 in the second group G2 are, for example, focus lenses, the lenses 28 in the third group G3 are, for example, zoom lenses, and the lenses 28 in the fourth group G4 are, for example, imaging lenses.

[0035] The lens device 10 includes a first holding frame 32A, a second holding frame 32B, a third holding frame 32C, a fourth holding frame 32D, a fifth holding frame 32E, and a sixth holding frame 32F. The first holding frame 32A, the second holding frame 32B, the third holding frame 32C, the fourth holding frame 32D, the fifth holding frame 32E, and the sixth holding frame 32F are all formed in an annular shape along the direction around the optical axis. The first holding frame 32A, the second holding frame 32B, the third holding frame 32C, the fourth holding frame 32D, the fifth holding frame 32E, and the sixth holding frame 32F are arranged in the following order from the objective side to the image forming side: the first holding frame 32A, the second holding frame 32B, the third holding frame 32C, the fourth holding frame 32D, the fifth holding frame 32E, and the sixth holding frame 32F.

[0036] The lens hood 12 has a cylindrical portion 34. The cylindrical portion 34 is disposed between a cam tube 38 (described later) and the outer tube 14, and is supported so as to be movable along the optical axis relative to the outer tube 14. The first holding frame 32A is disposed on the radial inner side of the hood portion 26, and is held by the hood portion 26. The second holding frame 32B, the third holding frame 32C, the fourth holding frame 32D, and the fifth holding frame 32E are disposed on the radial inner side of the inner tube 36 (described later), and are supported so as to be movable along the optical axis relative to the inner tube 36. The sixth holding frame 32F is fixed to the end of the outer tube 14 on the imaging side.

[0037] The lenses 28 of the first group G1 are held by the first holding frame 32A, and the lenses 28 of the second group G2 are held by the second holding frame 32B. Among the lenses 28 of the third group G3, the objective-side lens 28 and the aperture 30 are held by the third holding frame 32C, and the remaining lenses 28 of the third group G3 are held by the fourth holding frame 32D and the fifth holding frame 32E. The lenses 28 of the fourth group G4 are held by the sixth holding frame 32F.

[0038] The lens device 10 includes an outer cylinder 14, an inner cylinder 36, and a cam cylinder 38. The outer cylinder 14, the inner cylinder 36, and the cam cylinder 38 are all formed in a cylindrical shape. The outer cylinder 14, the inner cylinder 36, and the cam cylinder 38 are arranged concentrically around the optical axis OA. The cam cylinder 38 is disposed on the radially outer side of the inner cylinder 36, and the outer cylinder 14 is disposed on the radially outer side of the cam cylinder 38. The outer cylinder 14, the inner cylinder 36, and the rear cover 22 are fixed to the mount 24, and the cam cylinder 38 is rotatably supported around the optical axis with respect to the outer cylinder 14 and the inner cylinder 36.

[0039] The zoom ring 18 is connected to the cam cylinder 38 via a first connection mechanism (not shown). When the zoom ring 18 rotates, the cam cylinder 38 rotates. The aperture stop 30 is an aperture stop whose aperture size is adjustable and has a plurality of vanes (not shown) for adjusting the aperture size. The aperture ring 20 is connected to the plurality of vanes via a second connection mechanism (not shown). When the aperture ring 20 rotates, the plurality of vanes operate to adjust the aperture size of the aperture stop 30.

[0040] As shown in FIG. 3, the cam cylinder 38 has a first groove 40A, a second groove 40B, a third groove 40C, and a fourth groove 40D. The first groove 40A is a groove for moving the lens 28 of the first group G1 along the optical axis. The second groove 40B is a groove for moving the lens 28 of the second group G2 along the optical axis. The third groove 40C and the fourth groove 40D are grooves for moving the lens 28 of the third group G3 along the optical axis.

[0041] A first roller 42A is provided on the cylindrical portion 34 of the lens hood 12, and the first roller 42A is movably inserted into the first groove 40A. A second roller (not shown) is provided on the second holding frame 32B, and the second roller is movably inserted into the second groove 40B. A third roller 42C is provided on the third holding frame 32C and the fourth holding frame 32D, and the third roller 42C is movably inserted into the third groove 40C. A fourth roller 42D is provided on the fifth holding frame 32E, and the fourth roller 42D is movably inserted into the fourth groove 40D.

[0042] When the cam barrel 38 rotates, the first roller 42A moves relative to the first groove 40A, converting the rotational force of the cam barrel 38 into a linear force in the optical axis direction of the lens hood 12, causing the lens hood 12 to move along the optical axis. In addition, when the cam barrel 38 rotates, the second roller moves relative to the second groove 40B, converting the rotational force of the cam barrel 38 into a linear force in the optical axis direction of the second holding frame 32B, causing the second holding frame 32B to move along the optical axis.

[0043] Similarly, when the cam barrel 38 rotates, the third roller 42C moves relative to the third groove 40C, converting the rotational force of the cam barrel 38 into a linear force in the optical axis direction of the third and fourth holding frames 32C and 32D, and the third and fourth holding frames 32C and 32D move along the optical axis. Also, when the cam barrel 38 rotates, the fourth roller 42D moves relative to the fourth groove 40D, converting the rotational force of the cam barrel 38 into a linear force in the optical axis direction of the fifth holding frame 32E, and the fifth holding frame 32E moves along the optical axis.

[0044] As shown in FIG. 3, the lens device 10 includes a first linear sensor 50. The first linear sensor 50 is a sensor that detects the amount of rotation of the zoom ring 18 (specifically, the amount of rotation of the cam cylinder 38 corresponding to the rotation of the zoom ring 18). The zoom ring 18 is an example of the "first operation ring" in the technology of the present disclosure. The lens 28 of the third group G3 that moves in the optical axis direction as the zoom ring 18 rotates is an example of the "first lens" and the "zoom lens" in the technology of the present disclosure. The first linear sensor 50 is an example of the "first sensor" in the technology of the present disclosure.

[0045] The first linear sensor 50 is provided at an axial end of the cam cylinder 38 (as an example, the imaging-side end of the cam cylinder 38). As described above, the cam cylinder 38 has a first groove 40A, a second groove 40B, a third groove 40C, and a fourth groove 40D, and the first linear sensor 50 is arranged in a region closer to the imaging side than the groove (as an example, the fourth groove 40D) located closest to the imaging side among the first groove 40A, the second groove 40B, the third groove 40C, and the fourth groove 40D, as an example of the imaging-side end of the cam cylinder 38. The first groove 40A, the second groove 40B, the third groove 40C, and the fourth groove 40D are an example of the "plurality of grooves" in the technology of the present disclosure.

[0046] More specifically, the first linear sensor 50 is provided on the axial end face of the cam cylinder 38 (as an example, the imaging-side end face of the cam cylinder 38). That is, the first linear sensor 50 is arranged side by side with the cam cylinder 38 in the optical axis direction on the imaging side of the cam cylinder 38.

[0047] As shown in FIG. 4, the first linear sensor 50 is, as an example, an arc-shaped linear sensor, and is provided along the circumferential direction of the cam cylinder 38 at the imaging-side end of the cam cylinder 38. As an example, a resistive linear position sensor is used for the first linear sensor 50. Generally, a resistive linear position sensor is regarded as a sensor with higher resolution than an absolute encoder.

[0048] The first linear sensor 50 has a first substrate member 52 and a first movable member 54. The first substrate member 52 is provided in an arc shape along the circumferential direction of the cam cylinder 38. The first substrate member 52 has a conductor (not shown) extending along the circumferential direction of the cam cylinder 38. A first connection member 56 is connected to the first substrate member 52. The first substrate member 52 and the first connection member 56 are formed of, for example, a flexible printed circuit (FPC). The first connection member 56 extends from one end of the first substrate member 52 in the axial direction of the cam cylinder 38. A substrate 58 is disposed on the imaging side with respect to the cam cylinder 38, and the first connection member 56 is connected to the substrate 58.

[0049] The first substrate member 52 is fixed to an inner cylinder 36 (see FIG. 2) provided inside the cam cylinder 38 in the radial direction. The first movable member 54 is movably attached to the first substrate member 52. The first movable member 54 is connected to the cam cylinder 38. When the cam cylinder 38 rotates with respect to the inner cylinder 36, the first movable member 54 moves with respect to the first substrate member 52 as the cam cylinder 38 rotates. When the first movable member 54 moves with respect to the first substrate member 52, the electrical resistance between the first movable member 54 and the first substrate member 52 changes. The first linear sensor 50 detects an electrical resistance that changes corresponding to the rotation amount of the cam cylinder 38 and outputs a signal corresponding to the detected electrical resistance.

[0050] As an example, the first substrate member 52 is fixed to the outer peripheral surface of the inner cylinder 36, and the first movable member 54 is provided on the outer peripheral side of the first substrate member 52. That is, the first linear sensor 50 is a sensor of an outer sliding type in which the first movable member 54 slides on the outer peripheral side of the first substrate member 52. The inner cylinder 36 is an example of the "first cylindrical member" in the technology of the present disclosure. The first substrate member 52 is a member having the radial direction of the inner cylinder 36 as its plate thickness.

[0051] The outer cylinder 14 provided radially outward of the cam cylinder 38 has a bottom wall portion 60 (see FIG. 2). The bottom wall portion 60 is provided at the end of the outer cylinder 14 on the imaging side. The bottom wall portion 60 is located on the imaging side of the cam cylinder 38 and faces the cam cylinder 38 in the optical axis direction. A first dead space 62 is provided between the cam cylinder 38 and the bottom wall portion 60, and the first linear sensor 50 is disposed in the first dead space 62. The outer cylinder 14 is an example of a "second cylinder member" in the technology of the present disclosure. The bottom wall portion 60 is an example of an "opposing wall" in the present disclosure. The first dead space 62 is an example of a "first region" in the present disclosure.

[0052] As shown in FIG. 5, the lens device 10 includes a second linear sensor 70. The second linear sensor 70 is a sensor that detects the amount of rotation of the aperture ring 20. The second linear sensor 70 is provided on the radial outside of the cam barrel 38. The aperture ring 20 is an example of a "second operation ring" in the technology of the present disclosure. The second linear sensor 70 is an example of a "second sensor" in the technology of the present disclosure.

[0053] 6, the second linear sensor 70 is, for example, an arc-type linear sensor, and is provided radially outside the cam barrel 38 along the circumferential direction of the cam barrel 38. For example, the second linear sensor 70 is a resistive linear position sensor.

[0054] The second linear sensor 70 has a second board member 72 and a second movable member 74. The second board member 72 is provided in an arc shape along the circumferential direction of the cam barrel 38. The second board member 72 has a conductor (not shown) extending along the circumferential direction of the cam barrel 38. A second connection member 76 is connected to the second board member 72. The second board member 72 and the second connection member 76 are formed of, for example, a flexible board. The second connection member 76 extends from one end of the second board member 72 in the circumferential direction of the cam barrel 38. The second connection member 76 is connected to the board 58 (see FIG. 3).

[0055] The second substrate member 72 is fixed to an outer cylinder 14 (see FIG. 2) provided on the radially outer side of the cam cylinder 38. The second movable member 74 is movably attached to the second substrate member 72. The second movable member 74 is connected to the aperture ring 20 via a connecting portion 78. When the aperture ring 20 rotates with respect to the outer cylinder 14, the second movable member 74 moves with respect to the second substrate member 72 as the aperture ring 20 rotates. When the second movable member 74 moves with respect to the second substrate member 72, the electrical resistance between the second movable member 74 and the second substrate member 72 changes. The second linear sensor 70 detects the electrical resistance that changes corresponding to the amount of rotation of the aperture ring 20, and outputs a signal corresponding to the detected electrical resistance.

[0056] As an example, the second substrate member 72 is fixed to the inner peripheral surface of the outer cylinder 14, and the second movable member 74 is provided on the inner peripheral side of the second substrate member 72. That is, the second linear sensor 70 is an inner sliding type sensor in which the second movable member 74 slides on the inner peripheral side of the second substrate member 72. The second substrate member 72 is a member having the radial direction of the outer cylinder 14 as its plate thickness.

[0057] The outer cylinder 14 (see FIG. 2) has a portion with an outer diameter having a first diameter (hereinafter referred to as "first diameter portion 80") and a portion with an outer diameter having a second diameter (hereinafter referred to as "second diameter portion 82"). The first diameter is larger than the second diameter. The hood portion 26 of the lens hood 12 is provided inside the first diameter portion 80, and the second diameter portion 82 of the outer cylinder 14 is located on the imaging side with respect to the hood portion 26. A second dead space 84 is provided between the imaging-side end of the hood portion 26 and the second diameter portion 82, and the second linear sensor 70 is disposed in the second dead space 84. The lens 28 provided on the lens hood 12 is an example of the "second lens" according to the technology of the present disclosure. The hood portion 26 of the lens hood 12 is an example of the "moving member" according to the technology of the present disclosure. The second dead space 84 is an example of the "second region" in the present disclosure. As shown in FIG. 7, the second linear sensor 70 is disposed on the object side with respect to the aperture ring 20.

[0058] Note that the second linear sensor 70 may be a sensor of an outer sliding type in which the second movable member 74 slides on the outer peripheral side of the second substrate member 72. And the second substrate member 72 may be fixed to the outer peripheral surface of the inner cylinder 36, for example, and the second movable member 74 may be provided on the outer peripheral side of the second substrate member 72.

[0059] As shown in FIGS. 9 and 10, a plurality of recesses 90 arranged in the rotational direction of the aperture ring 20 are formed on the imaging side surface 20A of the aperture ring 20. All of the plurality of recesses 90 open to the imaging side. The imaging side surface 20A of the aperture ring 20 is an example of the "first surface" according to the technology of the present disclosure.

[0060] As shown in FIG. 11, a first holding portion 92 is formed in the rear cover 22. The first holding portion 92 is formed in a cylindrical shape with an axis parallel to the optical axis direction. A first spring 94 is housed inside the first holding portion 92, and a first ball member 96, which is a ball-shaped member, is provided on the objective side of the first spring 94. The first spring 94 is, as an example, a coil spring. The first ball member 96 is biased by the first spring 94 toward the side of the plurality of recesses 90 (that is, the objective side), and is selectively fitted into the plurality of recesses 90 in accordance with the rotation of the aperture ring 20.

[0061] By selectively fitting the first ball member 96 into the plurality of recesses 90 in accordance with the rotation of the aperture ring 20, a click feeling is obtained with respect to the rotation of the aperture ring 20. That is, the plurality of recesses 90, the first ball member 96, and the first spring 94 constitute a first click mechanism 98 that imparts a click feeling to the rotation of the aperture ring 20. In a state where the first ball member 96 is fitted into any of the plurality of recesses 90, the aperture ring 20 is locked to the rear cover 22, so the first click mechanism 98 constitutes a locking mechanism that locks the operation ring to the rear cover 22. The aperture ring 20 is an example of the "operation ring" according to the technology of the present disclosure. The first ball member 96 is an example of the "protrusion member" according to the technology of the present disclosure. The first spring 94 is an example of the "biasing member" according to the technology of the present disclosure. The first click mechanism 98 is an example of the "click mechanism" and the "locking mechanism" according to the technology of the present disclosure.

[0062] The first spring 94 may be various springs other than a coil spring. Also, a biasing member such as a rubber material may be used instead of the first spring 94. Also, instead of the first ball member 96, for example, a convex member having a shape other than a ball shape may be used.

[0063] A rotating member 100 is provided on the objective side of the rear cover 22. The rotating member 100 is formed in an annular shape (for example, a circular ring shape) along the direction around the optical axis. The rotating member 100 is supported by the rear cover 22 so as to be rotatable in the direction around the optical axis. The rotating member 100 is disposed opposite to the image-side surface 20A of the aperture ring 20. The rotating member 100 is an example of a "first member" according to the technology of the present disclosure. The rotating member 100 may be formed in an arc shape along the direction around the optical axis.

[0064] As shown in FIGS. 12 and 13, the rotating member 100 has an opening 102 penetrating along the optical axis direction. The opening 102 is, for example, a through hole. The opening 102 may be a notch. The opening 102 has a size that allows the first ball member 96 to be inserted inside the opening 102. The opening 102 has a gradient that increases in diameter toward the side opposite the image-forming side surface 20A of the aperture ring 20 (i.e., the image-forming side). The rotating member 100 also has an interlocking portion 104. The interlocking portion 104 is formed in a concave shape.

[0065] A slide switch 110 is provided on the rear cover 22. The slide switch 110 is supported so as to be movable relative to the rear cover 22 in a direction around the optical axis (i.e., in the circumferential direction of the rear cover 22). The slide switch 110 is connected to the rotating member 100 via a connecting member 112. Specifically, the connecting member 112 is fixed to the slide switch 110, and a locking portion 114 that is locked with the locked portion 104 is formed on the connecting member 112. The locking portion 114 is formed in a convex shape.

[0066] The slide switch 110 is a member for switching the rotation position of the rotating member 100 between a first position and a second position. The slide switch 110 is an example of a "switching member" according to the technology of the present disclosure. The rotation position of the rotating member 100 is an example of a "movement position" according to the technology of the present disclosure. The rear cover 22 is an example of a "second member" according to the technology of the present disclosure.

[0067] 14 to 16, when the slide switch 110 is moved to the first movement position, the rotation position of the rotating member 100 becomes the first position, and the opening 102 moves to a position corresponding to the first ball member 96. In a state where the opening 102 is moved to a position corresponding to the first ball member 96, the first ball member 96 is inserted inside the opening 102, and the objective side portion of the first ball member 96 protrudes from the opening 102 (hereinafter referred to as the "first state"). In the first state, the first ball member 96 is selectively engaged with the multiple recesses 90 via the opening 102 in response to the rotation of the aperture ring 20, so that a clicking sensation is imparted to the rotation of the aperture ring 20.

[0068] As shown in FIG. 17 to FIG. 19, when the slide switch 110 moves to a second movement position opposite to the first movement position, the rotation position of the rotating member 100 becomes a second position different from the first position, and the region of the rotating member 100 other than the opening 102 (hereinafter referred to as the "closed region 100A") moves to a position corresponding to the first ball member 96. In a state in which the closed region 100A moves to a position corresponding to the first ball member 96, the first ball member 96 is in contact with the closed region 100A from the opposite side to the image-forming side surface 20A of the aperture ring 20 (i.e., the image-forming side) (hereinafter referred to as the "second state"). In the second state, even if the aperture ring 20 rotates, the first ball member 96 is maintained in contact with the closed region 100A, so that the first ball member 96 is not fitted into the recess 90, and therefore, it is possible to avoid a clicking sensation being given to the rotation of the aperture ring 20.

[0069] For example, when shooting a moving image using an imaging device equipped with the lens device 10, it is desirable to avoid the generation of a clicking sound associated with the clicking sensation, so when shooting a moving image, the slide switch 110 is moved to the second movement position.

[0070] 20, when viewed from the optical axis direction, the inner angle θ formed by a first line segment L1 connecting first ball member 96 and optical axis OA and a second line segment L2 connecting slide switch 110 and optical axis OA is set to an acute angle. More specifically, the first line segment L1 is a line segment connecting the center of first ball member 96 and optical axis OA. More specifically, the second line segment L2 is a line segment connecting the center of slide switch 110 in the first state (for example, the center of slide switch 110 in the overall length direction along the direction around the optical axis) and the optical axis. The angle θ is set to, for example, greater than or equal to 30° and less than 90°.

[0071] 21 and 22, a groove 120 is formed in the objective side surface 20B of the aperture ring 20. The objective side surface 20B of the aperture ring 20 is an example of the "second surface" according to the technology of the present disclosure. The groove 120 opens to the objective side and is formed in a V shape when viewed from a direction perpendicular to the optical axis OA.

[0072] The outer cylinder 14 is formed with a second holding portion 122. The second holding portion 122 is formed in a cylindrical shape with an axis parallel to the optical axis direction. A second spring 124 is housed inside the second holding portion 122, and a second ball member 126, which is a ball-shaped member, is provided on the imaging side of the second spring 124. The second spring 124 is, for example, a coil spring. The second ball member 126 is biased toward the groove 120 side (i.e., the imaging side) by the second spring 124. When the rotational position of the aperture ring 20 is a specific rotational position (hereinafter referred to as the "first rotational position"), the groove 120 moves to a position corresponding to the second ball member 126, and the second ball member 126 is fitted into the groove 120.

[0073] When the second ball member 126 is fitted into the groove 120, a click feeling is obtained with respect to the rotation of the aperture ring 20. That is, the groove 120, the second ball member 126, and the second spring 124 constitute a second click mechanism 128 that imparts a click feeling with respect to the rotation of the aperture ring 20. In a state where the second ball member 126 is fitted into the groove 120, since the aperture ring 20 is locked to the outer cylinder 14, the second click mechanism 128 constitutes a locking mechanism that locks the operation ring to the outer cylinder 14. The second ball member 126 is an example of the "fitting member" according to the technology of the present disclosure.

[0074] Note that the second spring 124 may be various springs other than a coil spring. Also, instead of the second spring 124, a biasing member such as a rubber material may be used. Further, instead of the second ball member 126, for example, a convex member having a shape other than a ball shape may be used.

[0075] The imaging device to which the lens device 10 is attached has a first mode and a second mode related to the aperture 30. For example, the first mode is a mode in which the aperture value is automatically set (that is, the auto mode), and the second mode is a mode in which the aperture value is manually set (that is, the manual mode).

[0076] As shown in FIG. 23, on the outer peripheral surface of the aperture ring 20, as an example of an index 130 representing the first mode, the letter "A" representing the auto mode is attached. On the outer peripheral surface of the outer cylinder 14, as an example of an index 132 representing the rotational position of the aperture ring 20, a bar line is attached. The first rotational position of the aperture ring 20 is set to a position corresponding to the index 130. That is, when the rotational position of the aperture ring 20 is the first rotational position, the index 130 moves to a position corresponding to the index 132. When the rotational position of the aperture ring 20 is the first rotational position, the imaging device to which the lens device 10 is attached becomes the first mode (i.e., the auto mode). On the other hand, when the rotational position of the aperture ring 20 is a rotational position other than the first rotational position, the imaging device to which the lens device 10 is attached becomes the second mode (i.e., the manual mode), and the aperture value is set according to the rotational position of the aperture ring 20. On the outer peripheral surface of the aperture ring 20, a numerical value 134 indicating the aperture value is shown.

[0077] When the slide switch 110 is moved to the second movement position (see FIGS. 17 to 19), even if the aperture ring 20 is rotated, no click feeling is generated by the first click mechanism 98. However, when the rotational position of the aperture ring 20 becomes the first rotational position (see FIGS. 21 to 23), a click feeling is generated by the second click mechanism 128. Therefore, the user can be notified by the click feeling of the second click mechanism 128 that the rotational position of the aperture ring 20 is the first rotational position, and thus the imaging device to which the lens device 10 is attached has entered the auto mode in which the aperture value is automatically set.

[0078] Next, the effects of the present embodiment will be described.

[0079] As described in detail above, in the lens device 10 according to the present embodiment, the first linear sensor 50 that detects the rotation amount of the zoom ring 18 is an arc-shaped linear sensor along the circumferential direction of the cam cylinder 38 and is provided at the axial end of the cam cylinder 38. Therefore, for example, compared with the case where the first linear sensor 50 is a linear sensor extending in the axial direction of the cam cylinder 38 and is provided on the outer side in the radial direction of the cam cylinder 38, the lens device 10 can be miniaturized in the radial direction.

[0080] That is, when the first linear sensor 50 is a linear sensor and is provided on the outer side in the radial direction of the cam cylinder 38, the outer cylinder 14 arranged on the outer side in the radial direction of the cam cylinder 38 has a deformed shape (for example, a shape obtained by adding a rectangle to a circle) having a shape for avoiding the linear sensor, or needs to be enlarged in the radial direction to avoid interference with the linear sensor. On the other hand, in the lens device 10 according to the present embodiment, since the first linear sensor 50 is an arc-shaped linear sensor along the circumferential direction of the cam cylinder 38 and is provided at the axial end of the cam cylinder 38, it is possible to avoid forming the outer cylinder 14 arranged on the outer side in the radial direction of the cam cylinder 38 into a deformed configuration having a shape for avoiding the first linear sensor 50 or enlarging it in the radial direction to avoid interference with the first linear sensor 50.

[0081] Further, the first linear sensor 50 is arranged in a region closer to the imaging side than the groove (as an example, the fourth groove 40D) located closest to the imaging side among the first groove 40A, the second groove 40B, the third groove 40C, and the fourth groove 40D formed in the cam cylinder 38. Therefore, it is possible to avoid interference between the first roller 42A, the second roller (not shown), the third roller 42C, and the fourth roller 42D respectively inserted into the first groove 40A, the second groove 40B, the third groove 40C, and the fourth groove 40D and the first linear sensor 50.

[0082] Further, the first linear sensor 50 includes a first substrate member 52 provided in an arc shape along the circumferential direction of the cam cylinder 38, and a first movable member 54 connected to the cam cylinder 38 and movably attached to the first substrate member 52. The first substrate member 52 is fixed to the outer peripheral surface of the inner cylinder 36 provided inside the cam cylinder 38 in the radial direction, and the first movable member 54 is provided on the outer peripheral side of the first substrate member 52. Therefore, for example, compared with the case where the first substrate member 52 is fixed to the inner peripheral surface of the cam cylinder 38 and the first movable member 54 is provided on the inner peripheral side of the first substrate member 52, it is possible to avoid the first movable member 54 protruding toward the lens 28 provided on the inner side in the radial direction of the inner cylinder 36, so that the lens device 10 can be miniaturized in the radial direction.

[0083] Further, the first substrate member 52 is a member having the radial direction of the inner cylinder 36 as its plate thickness. Therefore, for example, compared with the case where the first substrate member 52 is a member having the axial direction of the inner cylinder 36 as its plate thickness, the lens device 10 can be miniaturized in the radial direction.

[0084] Further, the first linear sensor 50 is disposed in a first dead space 62 provided between the bottom wall portion 60 of the outer cylinder 14 provided outside the cam cylinder 38 in the radial direction and the cam cylinder 38. Therefore, for example, compared with the case where a dedicated space for disposing the first linear sensor 50 is provided, the lens device 10 can be miniaturized in the axial direction.

[0085] Further, a resistive linear position sensor is used for the first linear sensor 50. Therefore, for example, compared with the case where an absolute encoder is used, the resolution when detecting the rotation amount of the zoom ring 18 can be increased.

[0086] Further, a second linear sensor 70 for detecting the amount of rotation of the aperture ring 20 is provided on the radially outer side of the cam barrel 38. The second linear sensor 70 has a second board member 72 provided in an arc shape along the circumferential direction of the cam barrel 38, and a second movable member 74 connected to the aperture ring 20 and attached so as to be movable relative to the second board member 72. The second board member 72 is fixed to the inner circumferential surface of the outer cylinder 14 provided on the radially outer side of the cam barrel 38, and the second movable member 74 is provided on the inner circumferential side of the second board member 72. Therefore, for example, compared to a case in which the second linear sensor 70 is provided on the radially inner side of the cam barrel 38, the amount of rotation of the aperture ring 20 can be detected with a simple structure.

[0087] Furthermore, the second substrate member 72 is a member whose thickness is in the radial direction of the outer tube 14. Therefore, for example, compared to when the second substrate member 72 is a member whose thickness is in the axial direction of the outer tube 14, the lens device 10 can be made smaller in the radial direction.

[0088] Moreover, the second linear sensor 70 is disposed in a second dead space 84 provided between the image-forming end of the hood portion 26 and a second diameter portion 82 of the outer barrel 14. Therefore, for example, the lens device 10 can be made smaller in size in the axial direction compared to a case in which a dedicated space is provided for disposing the second linear sensor 70.

[0089] Furthermore, the second linear sensor 70 is disposed on the objective side relative to the aperture ring 20. Here, there is structurally more space on the objective side relative to the aperture ring 20 than on the image side relative to the aperture ring 20. Therefore, for example, the degree of freedom in arranging the second linear sensor 70 can be increased compared to when the second linear sensor 70 is disposed on the image side relative to the aperture ring 20.

[0090] Furthermore, a resistive linear position sensor is used for the second linear sensor 70. Therefore, for example, the resolution for detecting the amount of rotation of the aperture ring 20 can be improved compared to when an absolute encoder is used.

[0091] Further, a rotating member 100 is rotatably provided around the optical axis on the rear cover 22. When the rotation position of the rotating member 100 is the first position, the first ball member 96 is selectively fitted with a plurality of concave portions 90 in accordance with the rotation of the aperture ring 20. Thereby, a click feeling can be imparted to the rotation of the aperture ring 20. Further, in a state where the first ball member 96 is fitted into any one of the plurality of concave portions 90, the aperture ring 20 can be locked to the rear cover 22.

[0092] Further, when the rotation position of the rotating member 100 is the second position, the first ball member 96 contacts the closing region 100A, which is a region other than the opening 102 in the rotating member 100, from the imaging side. Thereby, it is possible to avoid imparting a click feeling to the rotation of the aperture ring 20.

[0093] Further, the rotating member 100 faces the imaging-side surface 20A of the aperture ring 20 and is rotatably provided around the optical axis on the rear cover 22. Therefore, for example, compared with a case where a moving member that moves in the axial direction of the rear cover 22 is provided inside the rear cover 22 in the radial direction instead of the rotating member 100, the lens device 10 can be miniaturized in the radial direction.

[0094] That is, when a moving member that moves in the axial direction of the rear cover 22 is provided inside the rear cover 22 in the radial direction instead of the rotating member 100, it is necessary to expand the rear cover 22 in the radial direction to avoid interference with the moving member. On the other hand, in the lens device 10 according to the present embodiment, since the rotating member 100 faces the imaging-side surface 20A of the aperture ring 20 and is rotatably provided around the optical axis on the rear cover 22, it is possible to avoid expanding the rear cover 22 in the radial direction to avoid interference with the rotating member 100.

[0095] In addition, a slide switch 110 connected to the rotating member 100 is provided on the rear cover 22. Therefore, by moving the slide switch 110, the rotational position of the rotating member 100 can be switched between the first position and the second position.

[0096] In addition, the slide switch 110 is supported by the rear cover 22 so as to be movable in a direction around the optical axis. Therefore, since the moving direction of the slide switch 110 and the rotating direction of the aperture ring 20 are the same direction, for example, compared with the case where the slide switch 110 is supported by the rear cover 22 so as to be movable in the optical axis direction, the operability of the slide switch 110 can be improved. Also, compared with the case where the slide switch 110 is supported by the rear cover 22 so as to be movable in the optical axis direction, the connection structure between the slide switch 110 and the rear cover 22 can be simplified, so that the lens device 10 can be miniaturized in the radial direction.

[0097] In addition, the rotating member 100 is formed in an annular shape along a direction around the optical axis. Therefore, for example, compared with the case where the rotating member 100 is formed in an arc shape along a direction around the optical axis, the rigidity of the rotating member 100 can be increased.

[0098] In addition, when viewed from the optical axis direction, the inner angle θ formed by the first line segment L1 connecting the first ball member 96 and the optical axis OA and the second line segment L2 connecting the slide switch 110 and the optical axis OA is set to an acute angle. Therefore, for example, compared with the case where the first line segment L1 and the second line segment L2 are set to an obtuse angle, the first ball member 96 and the slide switch 110 can be brought closer to each other. Thereby, when the rotating member 100 is rotated by hooking a finger on the slide switch 110, the moment acting on the first ball member 96 due to the contact between the first ball member 96 and the peripheral edge of the opening 102 can be reduced.

[0099] In addition, the opening 102 has a gradient that widens in diameter toward the imaging side. Therefore, as the slide switch 110 is moved to the first movement position, the first ball member 96 can be guided to the inside of the opening 102. Therefore, the first ball member 96 can be inserted into the opening 102 more smoothly than when the diameter of the opening 102 is constant, for example.

[0100] Furthermore, a groove 120 is formed in the aperture ring 20, and when the rotational position of the aperture ring 20 is the first rotational position, the second ball member 126 fits into the groove 120. This makes it possible to inform the user that the rotational position of the aperture ring 20 is the first rotational position by the clicking sensation caused by the second click mechanism 128.

[0101] Furthermore, the first rotation position of the aperture ring 20 is a position corresponding to an index 130 (for example, the letter "A" indicating auto mode) that indicates a first mode related to the aperture 30. This allows the second click mechanism 128 to provide a clicking sensation that indicates that the imaging device to which the lens device 10 is attached has entered auto mode, which automatically sets the aperture value.

[0102] The above description and illustrations are detailed descriptions of the parts related to the technology of the present disclosure, and are merely an example of the technology of the present disclosure. For example, the above description of the configuration, function, action, and effect is an example of the configuration, function, action, and effect of the parts related to the technology of the present disclosure. Therefore, it goes without saying that unnecessary parts may be deleted, new elements may be added, or replaced with respect to the description and illustrations shown above, within the scope of the gist of the technology of the present disclosure. In addition, in order to avoid confusion and to facilitate understanding of the parts related to the technology of the present disclosure, the description and illustrations shown above omit explanations of technical common sense that do not require explanation in order to enable the implementation of the technology of the present disclosure. [Explanation of symbols]

[0103] 10 Lens device 12 Lens hood 14 Outer cylinder 16 Focus ring 18 Zoom ring 20 Diaphragm ring 20A Image-forming side surface of the diaphragm ring 20B Object side surface of the diaphragm ring 20 22 Rear cover 24 Mount 26 Hood portion 28 Lens 32A First holding frame 32B Second holding frame 32C Third holding frame 32D Fourth holding frame 32E Fifth holding frame 32F Sixth holding frame 34 Cylindrical portion 36 Inner cylinder 38 Cam cylinder 40A First groove 40B Second groove 40C Third groove 40D Fourth groove 42A First roller 42C Third roller 42D Fourth roller 50 First linear sensor 52 First substrate member 54 First movable member 56 First connecting member 58 Substrate 60 Bottom wall portion 62 First dead space 70 Second linear sensor 72 Second substrate member 74 Second movable member 76 Second connecting member 78 Connecting portion 80 First diameter portion 82 Second diameter portion 84 Second dead space 90 Recessed portion 92 First holding portion 96 First ball member 98 First click mechanism 100 Rotating member 100A Closed Region 102 Opening 104 Locked Part 110 Slide Switch 112 Connecting Member 114 Locking Part 120 Groove 122 Second Holding Part 126 Second Ball Member 128 Second Click Mechanism 130 Indicator 132 Indicator 134 Numerical Value θ Angle G1 First Group G2 Second Group G3 Third Group G4 Fourth Group L1 First Line Segment L2 Second Line Segment OA Optical Axis

Claims

1. a first lens; a first operation ring rotatably provided in a direction around an optical axis; a cam cylinder connected to the first operation ring and configured to move the first lens along the optical axis; a first sensor provided at an axial end of the cam cylinder and configured to detect a rotation amount of the first operation ring; a lens device comprising the above.

2. the cam cylinder has a plurality of grooves; the end portion is located in a region on the imaging side with respect to a groove located on the most imaging side among the grooves; the lens device according to Claim 1.

3. the first sensor has a first substrate member provided in an arc shape along a circumferential direction of the cam cylinder; and a first movable member connected to the cam cylinder and movably attached to the first substrate member; and has the above; the lens device according to Claim 1.

4. the first movable member is provided on an outer peripheral side of the first substrate member; the lens device according to Claim 3.

5. comprises a first cylindrical member provided on an inner side in a radial direction of the cam cylinder; the first substrate member is fixed to an outer peripheral surface of the first cylindrical member; the lens device according to Claim 4.

6. the first substrate member is a member having a plate thickness in a radial direction of the first cylindrical member; the lens device according to Claim 5.

7. comprises a second cylindrical member provided on an outer side in a radial direction of the cam cylinder; the second cylindrical member is located on the imaging side with respect to the cam cylinder and has an opposing wall opposing the cam cylinder in a direction of the optical axis; a first region is provided between the cam cylinder and the opposing wall; the first sensor is disposed in the first region; the lens device according to Claim 5.

8. the first sensor is a resistive linear position sensor; the lens device according to Claim 1.

9. the first lens is a zoom lens; the first operation ring is a zoom ring; the lens device according to Claim 1.

10. a diaphragm; a second operation ring rotatably provided around the optical axis and connected to the diaphragm; a second sensor provided on an outer side in a radial direction of the cam cylinder and configured to detect a rotation amount of the second operation ring; comprising the above; the lens device according to Claim 1.

11. the second sensor has a second substrate member provided in an arc shape along a circumferential direction of the cam cylinder; and a second movable member connected to the second operation ring and movably attached to the second substrate member; and has the above; the lens device according to Claim 10.

12. The second movable member is provided on the inner peripheral side of the second substrate member. The lens device according to claim 11.

13. It includes a second cylindrical member provided on the radially outer side of the cam cylinder. The second substrate member is fixed to the inner peripheral surface of the second cylindrical member. The lens device according to claim 12.

14. The second substrate member is a member having the radial direction of the second cylindrical member as its plate thickness. The lens device according to claim 13.

15. A second lens; A moving member that moves the second lens along the optical axis; Comprising; The second cylindrical member has a first diameter portion having a first diameter and a second diameter portion having a second diameter. The moving member is provided inside the first diameter portion. The second diameter portion is located on the imaging side with respect to the moving member. A second region is provided between the imaging-side end of the moving member and the second diameter portion. The second sensor is disposed in the second region. The lens device according to claim 13.

16. The second sensor is disposed on the object side with respect to the second operation ring. The lens device according to claim 10.

17. The second sensor is a resistive linear position sensor. The lens device according to claim 10.

18. It includes a click mechanism that imparts a click feeling to the rotation of the second operation ring. The lens device according to claim 10.

19. The click mechanism is A plurality of recesses formed in the second operation ring and arranged in the rotation direction of the second operation ring; A convex member that is selectively fitted into the plurality of recesses in response to the rotation of the second operation ring; A biasing member that biases the convex member toward the plurality of recesses; Having The lens device according to claim 18.

Images