JPWO2018198257A1 - Lens barrel, camera body, camera system - Google Patents

Abstract

In a lens interchangeable camera having a shake correction mechanism that integrally drives a lens barrel and an image pickup unit, a camera system and a lens that enable smooth lens exchange to improve practicality and convenience Provide a lens barrel. A lens barrel having a detachable camera body, the lens barrel being disposed inside the first barrel having a first engaging portion that engages with a first portion of the camera body. A second cylinder having a second engagement portion that engages with the second portion of the camera body and an optical system, the second cylinder including the second portion and the second engagement portion. It has a detection part which detects an engagement state.

Description

  The present invention relates to a lens barrel, a camera body, and a camera system.

  In an image pickup apparatus capable of shooting a moving image, in order to correct a wide range of blur correction angles, a lens barrel integrated with an image pickup unit is conventionally made swingable with respect to an outer frame of the image pickup apparatus and orthogonal to an optical axis. There is a shake correction mechanism including two drive units having a support shaft (see Patent Document 1).

  On the other hand, in the interchangeable lens type camera, it is necessary to allow the lens barrel to be attached to and detached from the camera body when exchanging the lens.

JP, 2013-140285, A

A lens barrel of the present invention is a lens barrel in which a camera body can be attached and detached, and includes a first barrel having a first engaging portion that engages with a first portion of the camera body, and an inner side of the first barrel. And a second cylinder having an optical system and a second engagement portion that is disposed in the second portion of the camera body, the second cylinder including the second portion and the second engagement. It is configured to have a detection unit that detects the engagement state with the unit.
Further, a camera body of the present invention is a camera body in which a lens barrel can be attached and detached, and includes a first housing having a first engaging portion that engages with a first barrel of the lens barrel, and the first casing. A second housing that is disposed inside the housing and has a second engaging portion that engages with the second cylinder of the lens barrel and an optical system; and the second housing includes the second housing. The detector is configured to detect the engagement state between the cylinder and the second engagement portion.
A camera system according to the present invention is a camera system in which a camera body and a lens barrel can be attached and detached, and the camera body includes a first housing and a second housing having an image sensor, The lens barrel includes a first barrel that engages with the first casing, and a second barrel that has an optical system and that engages with the second casing, and the camera body or the lens mirror. The cylinder is configured to have a detection unit that detects an engagement state between the second casing and the second cylinder.

FIG. 1 is a system configuration diagram of a camera system 1 including a lens barrel 3 and a camera body 2 of the first embodiment. It is the figure which simplified and showed the system configuration of the camera system 1 provided with the lens barrel 3 of 1st Embodiment, and the camera body 2. 9 is a flowchart showing a process performed by body control section 215. 7 is a flowchart showing a process performed by the lens control unit 314. It is a figure explaining an example of the lens lock mechanism which locks the lens inner shell 302 with respect to the lens outer shell 301. FIG. 6 is a diagram illustrating an example of a body lock mechanism that locks a body inner shell 202 with respect to a body outer shell 201. It is a front view which shows an axis alignment mechanism. It is a front view which shows the procedure which attaches a lens barrel to a camera body. It is a figure which shows an example of the fixing mechanism (lock mechanism of mount) which prevents loosening of a bayonet mount. 7 is a flowchart showing an operation of the body control unit 215 regarding detection of a combined state using the combined detection unit 240 and the combined detection unit 340. It is a figure which shows the outline of a coupling release mechanism. It is a figure which shows the modified form of the mount structure by the side of an inner shell. It is a system block diagram of the camera system 1 provided with the lens barrel 3 and camera body 2 of 2nd Embodiment. It is the figure which simplified and showed the system configuration of the camera system 1 provided with the lens barrel 3 and camera body 2 of 2nd Embodiment.

Hereinafter, description will be given with reference to the drawings and the like.
In the following description, the terms pitch axis P, yaw axis Y, and roll axis R are used as necessary for easy understanding. In the embodiment, the pitch axis P is the position of the camera body 2 when the photographer shoots a horizontally long image with the optical axis horizontal when the lens barrel 3 is attached to the camera body 2 (hereinafter, referred to as a positive position). ) Is an axis extending in the left-right direction when viewed from the photographer. The yaw axis Y is an axis extending in the vertical direction at the normal position. The roll axis R is an axis extending in the optical axis direction at the normal position. Therefore, the pitch axis P, the yaw axis Y, and the roll axis R are orthogonal to each other. The term "orthogonal" includes not only exactly 90 degrees but also a range slightly deviated from 90 degrees due to a manufacturing error or an assembly error.
Further, rotation about the pitch axis P is referred to as pitching, rotation about the yaw axis Y is referred to as yawing, and rotation about the roll axis R is referred to as rolling. Further, the pitching direction is the pitch direction, the yawing direction is the yaw direction, and the rolling direction is the roll direction.
In addition, the direction along the pitch axis P or the direction along the yaw axis Y is the shift direction.

(First embodiment)
FIG. 1A is a system configuration diagram of a camera system 1 including a lens barrel 3 of the first embodiment and a camera body 2. FIG. 1B is a diagram showing a simplified system configuration of a camera system 1 including the lens barrel 3 of the first embodiment and a camera body 2. Since FIG. 1A and FIG. 1B show the same camera system 1, for example, for the configurations not included in one of the figures, the other is supplemented by the other, and they complement each other. To do.
The camera system 1 may be a zoomable system or a non-zoomable system.

(Lens barrel 3)
The lens barrel 3 of this embodiment is attachable to and detachable from the camera body 2. Further, the lens barrel 3 is expandable / contractible between a contracted state (non-photographing state, housed state, retracted state) and an extended state (photographing state).
As shown in the system configuration diagrams of FIGS. 1A and 1B, the lens barrel 3 has a lens inner shell 302 that internally holds a lens group L that is an imaging optical system, and a housing that is arranged on the outer periphery of the lens inner shell 302. 320, and a lens outer shell 301 (for example, a fixed cylinder) arranged on the outer periphery of the housing 320. The lens inner shell 302 and the housing 320 may be combined to form a lens inner shell.

  In the lens barrel 3 of the present embodiment, the lens inner shell 302 is rotatable in the pitch direction about the pitch axis P with respect to the housing 320. The housing 320 is rotatable in the yaw direction about the yaw axis Y with respect to the lens outer shell 301.

  When the overall outer shape of the lens barrel 3 is cylindrical, it is conceivable that the lens inner shell, the lens outer shell, and the housing are also cylindrical. However, a flat portion may be provided on the inner peripheral surface or the outer peripheral surface for disposing other components. Further, the inner shell of the lens, the outer shell of the lens, and the housing may be appropriately deformed by forming flat portions, notches, portions of varying thickness, and the like. Instead of the cylindrical shape, the shape may be a quadrangular prism.

(Lens inner shell 302)
As shown in FIGS. 1A and 1B, the lens inner shell 302 of the lens barrel 3 includes a lens group L, a shift direction image stabilization system 330, a shake detection unit 325, and a lens inner shell mount 326.
Further, the lens inner shell 302 includes a part of a pitch driving unit 322 that drives the lens inner shell 302 with respect to the housing 320 in the pitch direction.

  The lens group L is an image forming optical system that forms a subject image on the image pickup element 220 arranged in the camera body 2. Further, the lens group L includes a vibration isolation optical system LB. The image stabilization optical system LB moves in the shift direction and can correct image blur due to camera shake or the like.

  The shift direction image stabilization system 330 is a system that controls the image stabilization optical system LB that moves in the shift direction. A movable frame that holds the image stabilization optical system LB, an image stabilization optical system position detection unit that detects the position of the image stabilization optical system LB, a shift drive unit 332 that drives the movable frame in the shift direction, and the like. The shift drive unit 332 may be a voice coil motor (VCM) or the like. By the shift driving unit 332, the image stabilization optical system LB is driven in a direction of canceling the image blur of the subject image caused by the camera shake of the photographer, and the image blur is corrected.

The shake detection unit 325 detects shake of the lens inner shell 302 in the pitch direction, yaw direction, roll direction, or shift direction. The blur detection unit 325 may detect shake in at least one direction. Blur in all directions may be detected.
The shake detection unit 325 may be a gyro sensor or the like. It may be configured with one sensor or may be configured with a plurality of sensors.

  The lens inner shell mount 326 has a shape including the lens inner shell coupling portion 317, and is in contact with a body inner shell mount 224 described later. Further, the lens inner shell mount 326 has a coupling detection unit 340. Details will be described later.

(Case 320)
The housing 320 includes a pitch drive unit 322 and a pitch direction rotation detection unit 323. The pitch drive unit 322 drives the lens inner shell 302 in the pitch direction. When the pitch driving section 322 is driven, the lens inner shell 302 rotates in the pitch direction about the pitch axis P.

The pitch direction rotation detector 323 detects the rotation amount of the lens inner shell 302 in the pitch direction. In other words, the pitch direction rotation detector 323 detects the drive amount of the pitch driver 322. The pitch direction rotation detection unit 323 detects the rotation amount of the lens inner shell 302 (or the drive amount of the pitch driving unit 322) to determine whether the lens inner shell 302 (or the pitch driving unit 322) is accurately driven. can do. Further, the housing 320 includes a part of the yaw driving unit 312 that drives the housing 320 in the yaw direction with respect to the lens outer shell 301.
When the yaw driving unit 312 is driven, the housing 320 is driven in the yaw direction with respect to the lens outer shell 301. Along with that, the lens inner shell 302 is also driven in the yaw direction.

(Lens outer shell 301)
As shown in FIGS. 1A and 1B, the lens outer shell 301 includes a yaw driving unit 312, a yaw direction rotation detecting unit 313, an operating member 315, a lens outer shell mount 310, and a lens control unit 314. The yaw drive unit 312 drives the housing 320 in the yaw direction. The yaw direction rotation detector 313 detects the yaw direction rotation of the housing 320. In other words, the yaw direction rotation detection unit 313 detects the drive amount of the yaw drive unit 312. The yaw direction rotation detection unit 313 detects the rotation amount of the housing 320 (or the driving amount of the yaw driving unit 312) to determine whether the housing 320 (or the pitch driving unit 322) is accurately driven. You can The operation member 315 is a member operated by the user.
The lens outer shell mount 310 includes a contact 311 for communication or energization. Further, the lens outer shell mount 310 has a shape including a lens outer shell coupling portion 316.
The lens controller 314 controls the shift driver 332, the pitch driver 322, and the yaw driver 312. Further, the lens control unit 314 moves the lens group L in the optical axis direction to change the focal length when the user operates the operation member 315 described later.
The lens outer shell 301 and the lens inner shell 302 are electrically connected by a wiring portion such as a flexible printed wiring board (hereinafter, FPC).

(Camera body 2)
Next, the camera body 2 will be described.
As shown in the system configuration diagrams of FIGS. 1A and 1B, the camera body 2 includes a body inner shell 202 and a body outer shell 201 (for example, a body fixing portion).

  The body inner shell 202 includes an image sensor 220, an image sensor driving unit 223, and a body inner shell mount 224. The body outer shell 201 includes a body control unit 215, an image processing unit 218, a body outer shell mount 210, a display unit 214, a battery 212, and an operation member 213.

  The image sensor 220 receives the light incident from the imaging optical system (lens group L) and converts it into an electric signal. The image sensor drive unit 223 drives the image sensor 220 to perform blur correction. The body inner shell mount 224 has a shape including the body inner shell mount 217, and is in contact with the lens inner shell mount 326. Further, it has a binding detection unit 240. Details will be described later.

  The body control unit 215 performs blur correction calculation and control described later. In addition, various controls are performed based on the input of the operation member 213. The image processing unit 218 performs image processing on the image data output from the image sensor 220.

The body shell mount 210 includes contacts 211 for communication or energization. Further, the body outer shell mount 210 has a shape including a body outer shell coupling portion 216. The display unit 214 displays image data acquired by the image sensor 220 and information about various settings. The operation member 213 is operated by the user.
Further, the outer body shell 201 and the inner body shell 202 are electrically connected by wiring such as an FPC.

With the above configuration, the camera system 1 according to the present embodiment is a camera system in which the lens barrel 3 can be exchanged, and the lens inner shell 302 and the body inner shell 202 are integrated into a shake correction operation (hereinafter, integrated Drive shake correction.) Can be performed.
In this camera system 1, the body outer shell 201 of the camera body 2 and the lens outer shell 301 of the lens barrel 3 are combined and integrated. Further, the body inner shell 202 of the camera body 2 and the lens inner shell 302 of the lens barrel 3 are joined and integrated. In this state, when the shake detection unit 325 detects a shake in the pitch direction or the yaw direction, the lens control unit 314, based on the output signal thereof, causes the yaw drive unit 312 and The pitch driving unit 322 is driven. As a result, shake correction is executed. The image blur of the subject image due to the camera shake of the photographer is corrected. Further, the lens shift blurring correction using the shift direction image stabilization system 330 can be performed simultaneously or selectively. Further, the blur correction may be performed simultaneously or selectively by driving the image sensor 220 in any of the shift direction, the pitch direction, the yaw direction, and the roll direction by a driving unit (not shown).

The blur correction in this embodiment will be described in detail.
FIG. 2 is a flowchart showing the processing performed by the body control unit 215.
In the flowchart shown in FIG. 2, the following three types of blur correction can be executed.
(1) Integrated drive blur correction: Blur correction performed by integrally driving the lens inner shell 302 and the body inner shell 202.
(2) Lens shake correction: Shake correction performed by the shift direction image stabilization system 330. The image stabilizing optical system LB is driven in the shift direction to correct the image blur.
(3) Image sensor blur correction: The blur correction performed by moving the image sensor 220.
When the power of the camera body 2 is turned on and the operation is started, in step (hereinafter, referred to as S) 110, the body control unit 215 determines whether a live view image is being displayed or a moving image is being taken. If the through image is being displayed or the moving image is being captured, the process proceeds to S120. If neither a through image is displayed nor a moving image is captured, the process proceeds to S160.

  In S120, the body control unit 215 determines whether the shake correction mode is the integrated drive shake correction mode, the lens shake correction mode, or the image sensor shake correction mode. As a result, the operation content of the shake correction thereafter is determined. The body control unit 215 determines the shake correction mode based on, for example, the mode set by the user. Alternatively, the body control unit 215 may automatically determine based on the size of the blur detected by the blur detection unit 325. Alternatively, when both the camera body 2 and the lens barrel 3 are systems having inner shells, it is determined to be the integrated drive shake correction mode, and when at least one of them is a system having no inner shells, lens shake correction is performed. It may be determined to be the mode or the image sensor shake correction mode.

  In S130, the body control unit 215 determines whether the blur detection unit 325 detects blur. The blur detected by the blur detection unit 325 is acquired by the body control unit 215 of the camera body 2 via the contact 311 and the contact 211. The timing at which the body control unit 215 acquires the blur detected by the blur detection unit 325 is not limited to the timing of S130. The lens barrel 3 may transmit the blur detected by the blur detection unit 325 to the camera body 2 at a predetermined timing. The blur detection unit 325 can detect at least one of pitch blur, yaw blur, roll blur, and shift blur. The blurring in all directions may be detected, or the blurring in multiple directions may be detected. Here, regarding whether or not the blur is detected, for example, it is determined that the blur is detected when the output value of the blur detection unit 325 is a certain value or more. When the blur detection unit 325 detects at least one of pitch blur, yaw blur, roll blur, and shift blur, the process proceeds to S140. If the shake detection unit 325 has not detected shake in the pitch direction, shake in the yaw direction, shake in the roll direction, or shake in the shift direction, the process proceeds to S150.

In S140, the body control unit 215 transmits a shake correction instruction to the lens barrel 3.
The blur correction instruction given in S190 is an instruction corresponding to the blur correction mode confirmed in S120. Specifically, when the blur correction mode is the integrated drive blur correction mode in S120, the body control unit 215 transmits an instruction to drive the pitch drive unit 322 and the yaw drive unit 312 to the lens barrel 3. The body control unit 215 calculates the yaw drive unit 312 and the pitch drive unit 322 in which direction and by how much, and the calculation is performed by the body control unit 215 based on the blur detected in S130 and transmitted to the lens barrel 3.
In addition, when the shake correction mode is the lens shake correction mode in S120, the body control unit 215 sends an instruction to control the shift direction image stabilization system 330 to the lens barrel 3. The control content of the shift direction image stabilization system 330 is calculated by the body control unit 215 based on the amount of blur detected in S130, and is transmitted to the lens barrel 3.
In addition, when the shake correction mode is the image pickup device shake correction mode in S120, the body control unit 215 drives the image pickup device driving unit 223. By driving the image sensor driving unit 223, the image sensor 220 can be driven in any of the pitch direction, the yaw direction, the roll direction, and the shift direction. By this, the image blur is corrected. When the shake correction mode is the image sensor shake correction mode, it is not necessary to transmit the shake correction instruction to the lens barrel 3, and the body control unit may control the image sensor drive unit 223.
The lens control unit 314 controls the actuators (the yaw drive unit 312, the pitch drive unit 322, and the shift drive unit 332 included in the shift direction vibration isolation system 330) according to instructions from the body control unit 215.
In the blur correction calculation performed by the body control unit 215, at least the detection value of the blur detection unit 325, the information about the installation position of the blur detection unit 325, and the center-of-gravity position information of the lens barrel 3 (or the lens inner shell 302). Center of gravity position information) is required. Using these pieces of information, the parameters of the blur correction instruction necessary for each blur correction are calculated, and this is transmitted to the lens controller 314. The lens controller 314 may perform the blur correction calculation.

  In S150, the body control unit 215 determines whether or not the power has been turned off. If the power has not been turned off, the process returns to S110, and if the power has been turned off, the operation ends.

In S160, the body control unit 215 determines whether or not a still image is being displayed. If the still image is being displayed, the process proceeds to S170. If no still image is displayed, the process proceeds to S15.
In S170, the body control unit 215 continues to display the still image, and returns to S150.

FIG. 3 is a flowchart showing the processing performed by the lens control unit 314.
In S210, the lens control unit 314 determines whether or not the shake correction instruction (the shake correction instruction transmitted by the body control unit 215 in S140 of FIG. 2) is received from the camera body 2. When the shake correction instruction is received, the process proceeds to S220, and when the shake correction instruction is not received, the process proceeds to S230.

  In S220, the lens control unit 314 drives each actuator according to the blur correction instruction to perform the blur correction operation. Note that in S220, the information on which actuator to drive in which direction and how much is included in the shake correction instruction received from the camera body 2.

  In S230, the lens control unit 314 determines whether the power is turned off. If the power is not turned off, the process returns to S210, and if the power is turned off, the operation ends.

  Next, details of the camera system 1 of the present embodiment will be described in detail for each configuration.

(1. Mount configuration)
As described above, the lens barrel 3 of the present embodiment includes the lens outer shell coupling portion 316 provided on the lens outer shell 301 and the lens inner shell coupling portion 317 provided on the lens inner shell 302. .. The camera body 2 also includes a body outer shell coupling portion 216 provided on the body outer shell 201 and a body inner shell coupling portion 217 provided on the body inner shell 202.
A bayonet is constituted by each of these coupling portions. The lens outer shell coupling portion 316 and the body outer shell coupling portion 216 can be coupled (may be engaged) or separable. Similarly, the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 can be coupled (engaged) or separable. The connection or the separation of these is performed by the bayonet. With such a configuration, the lens barrel 3 is detachable from the camera body 2.

  In this camera system 1, when attaching the lens barrel 3 to the camera body 2, the user moves the lens outer shell 301 of the lens barrel 3 relative to the body outer shell 201 by a predetermined angle (for example, 60 °). It is rotated and coupled to the body outer shell 201 of the camera body 2. More specifically, the lens outer shell coupling portion 316 is engaged with the body outer shell coupling portion 216. Since the lens inner shell 302 also rotates with the rotation of the lens outer shell 301 with respect to the body outer shell 201, the lens inner shell coupling portion 317 engages with the body inner shell coupling portion 217, and the lens inner shell of the lens barrel 3 is engaged. 302 is coupled to the body inner shell 202 of the camera body 2. The operation of removing the lens barrel 3 is the reverse of this.

  Here, the lens inner shell 302 is not fixed to the lens outer shell 301, but can move within a predetermined range with respect to the lens outer shell 301. That is, the relative positional relationship between the lens inner shell 302 and the lens outer shell 301 changes. The body inner shell 202 is not fixed to the body outer shell 201 and can move within a predetermined range with respect to the body outer shell 201. That is, the relative positional relationship between the body inner shell 202 and the body outer shell 201 changes. As described above, since the positional relationship between the inner shell and the outer shell is not fixed, when the lens barrel 3 is attached to or detached from the camera body 2, the attachment and detachment of the lens inner shell 302 and the body inner shell 202 is surely performed. May not be done. Therefore, it is conceivable to attach and detach the lens inner shell 302 and the body inner shell 202 with the following configuration.

(1-1. Inner shell lock mechanism)
As a configuration that enables the lens inner shell 302 and the body inner shell 202 to be attached and detached, there is a locking mechanism that fixes (locks) the lens inner shell 302 to the lens outer shell 301 at a predetermined position.
FIG. 4 is a diagram illustrating an example of a lens lock mechanism that locks the lens inner shell 302 with respect to the lens outer shell 301. FIG. 4A shows a locked state, and FIG. 4B shows an unlocked state.

In the example shown in FIG. 4, the DC motor 401 and the worm gear 402 are attached to the lens outer shell 301 of the lens barrel 3. A lock ring 403 is rotatably attached around the cylindrical portion of the lens inner shell 302.
A gear portion 404 is formed around the lock ring 403, and a gear member 405 is arranged between the worm gear 402 and the gear portion 404.

When locked, the DC motor 401 is driven to rotate the worm gear 402, and the lock ring 403 is rotated via the gear member 405 and the gear portion 404.
Then, the protrusion 406 provided on the inner peripheral side of the lock ring 403 comes into contact with the protrusion 407 provided on the lens inner shell 302 and presses it.
As a result, the lens inner shell 302 is fixed to the lens outer shell 301.

When releasing the lock, the DC motor 401 is driven in the reverse direction to rotate the worm gear 402, and the lock ring 403 is rotated in the reverse direction via the gear member 405 and the gear portion 404.
Then, the projection 406 provided on the inner peripheral side of the lock ring 403 and the projection 407 of the lens inner shell 302 are brought into non-contact with each other, and the fixation of the lens inner shell 302 to the lens outer shell 301 is released.
The lock ring 403 may be mechanically rotated in association with the attachment / detachment of the camera body 2 and the lens barrel 3.

Similarly, on the body side, there is a lock mechanism that fixes (locks) the inner body shell 202 at a predetermined position with respect to the outer body shell 201.
FIG. 5 is a diagram illustrating an example of a body lock mechanism that locks the body inner shell 202 with respect to the body outer shell 201. 5A shows a state where the body inner shell 202 and the body outer shell 201 are locked, and FIG. 5B shows a state where the body inner shell 202 and the body outer shell 201 are unlocked. Indicates.
In the body lock mechanism of FIG. 5, the claw portions 241 and 242 driven by an actuator (not shown) are provided in the body outer shell 201. By moving the claw portions 241 and 242, the locked state and the unlocked state can be switched. Note that the claw portions 241 and 242 may be mechanically moved in association with the attachment / detachment of the camera body 2 and the lens barrel 3.

  In the following description, a mechanism for locking the lens inner shell 302 at a predetermined position with respect to the lens outer shell 301 is called a lens lock mechanism, and a mechanism for locking the body inner shell 202 at a predetermined position with respect to the body outer shell 201 is referred to as a body lock mechanism. It is called a lock mechanism. Such a lens lock mechanism and a body lock mechanism may be mechanically unlocked. For example, the lock of the lens lock mechanism and the body lock mechanism is released in association with the attachment / detachment of the lens barrel 3. Alternatively, the lock of the lens lock mechanism and the body lock mechanism may be released in conjunction with a switch (not shown). Further, the lens lock mechanism and the body lock mechanism may be electrically unlocked by a motor (not shown). For example, when it is detected that the lens barrel 3 is attached, a motor (not shown) is driven to unlock the lens lock mechanism and the body lock mechanism. Alternatively, when a lock release instruction is detected by operating a switch or an operation member 213 (not shown), a motor (not shown) may be driven to unlock the lens lock mechanism and the body lock mechanism. In this case, a motor (not shown) is provided in the lens barrel 3 and the camera body 2.

  In the camera system 1 of the present embodiment, the lens inner shell 302 has a degree of freedom that allows it to swing with respect to the lens outer shell 301, but its movable range is physically (mechanically). It is restricted. Similarly, the body inner shell 202 has a degree of freedom that allows it to swing with respect to the body outer shell 201, but its movable range is physically (mechanically) limited. Therefore, even if the lens lock mechanism or the body lock mechanism is not operating or is not provided, the rotation of the outer shell does not follow the rotation, although there is a certain degree of freedom. The inner shell is also configured to rotate.

(1-2. Central axis (rotation axis) alignment mechanism)
In the lens barrel 3, since the lens inner shell 302 is swingably supported with respect to the lens outer shell 301, the state in which the lens inner shell 302 falls by its own weight or the lens inner shell 302 with respect to the lens outer shell 301 It is possible that the shell 302 is inclined. When the lens barrel 3 is attached to the camera body 2 in such a state, the rotation axis of the lens outer shell 301 and the rotation axis of the lens inner shell 302 are deviated from each other, so that the lens barrel 3 is attached to the camera body 2. It may not be installed smoothly. The same applies to the body inner shell 202 and the body outer shell 201.

Therefore, as a second example of a configuration in which the lens inner shell 302 and the body inner shell 202 can be attached and detached, when the lens outer shell 301 rotates, the rotation axis of the lens inner shell 302 becomes the rotation axis of the lens outer shell 301. A description will be given of the axis alignment mechanism.
FIG. 6 is a front view of the axis-aligning mechanism viewed from the subject side in parallel with the optical axis.
In this axial alignment mechanism, as shown in FIG. 6, as the lens inner shell 302 rotates about its rotation axis, the lens inner shell coupling portion 317 (for example, a claw portion) causes the body inner shell mount 224 to move. The lens inner shell 302 and the lens outer shell 301 engage with each other by rotating while being guided by a guide member 224c provided so that the inner diameter thereof gradually decreases.

  By this axial alignment mechanism, the lens inner shell coupling portion 317 engages with the body inner shell coupling portion 217. Therefore, even when the rotation axis of the lens outer shell 301 and the rotation axis of the lens inner shell 302 do not match, the lens barrel 3 can be smoothly attached to the camera body 2. In this respect, the practicality and convenience of the camera system 1 can be improved.

  When removing the lens barrel 3 from the camera body 2, the lens outer shell 301 of the lens barrel 3 is rotated in the opposite direction by a predetermined angle (for example, 60 °), and the body outer shell of the camera body 2 is rotated. The engagement state with 201 is released. When the lens barrel 3 is rotated so as to be removed, the lens inner shell 302 also rotates following the rotation of the lens outer shell 301. As a result, the lens outer shell coupling portion 316 is disengaged from the body outer shell coupling portion 216, and the lens inner shell coupling portion 317 is disengaged from the body inner shell coupling portion 217, and the removal operation of the lens barrel 3 is completed here.

  Instead of such an axis alignment mechanism, an actuator (not shown) is driven to appropriately move the lens inner shell 302 so that the rotation axes of the lens inner shell 302 and the lens outer shell 301 coincide with each other. The rotation axis of the lens inner shell 302 may be aligned with the rotation axis of the lens outer shell 301. The rotation axes of the inner shell and the outer shell may be aligned with each other by using the lock mechanism described above.

(1-3. Mount rotation amount matching mechanism)
In the camera system 1, as described above, the inner shell side has a degree of freedom with respect to the outer shell side. Therefore, when the lens barrel 3 is attached to the camera body 2, the rotation amount (rotation angle) of the lens inner shell 302 is insufficient, and the body inner shell coupling portion 217 and the lens inner shell coupling portion 317 are properly coupled. It is conceivable that it will not be forgotten.

Therefore, a mechanism for adjusting the mount rotation amount will be described.
FIG. 7 is a diagram showing a procedure for attaching the lens barrel to the camera body. It is a front view seen from the subject side in parallel with the optical axis.
The body inner shell coupling portion 217 and the lens inner shell coupling portion 317 are configured to start engaging before the body outer shell coupling portion 216 and the lens outer shell coupling portion 316 start to engage with each other.

  For example, when the lens outer shell 301 is rotated clockwise by, for example, 5 ° from the state shown in FIG. 7A, the lens inner shell coupling portion 317 becomes the body inner shell coupling portion 217 as shown in FIG. 7B. Start hanging on. At this time, the lens outer shell coupling portion 316 is not yet hooked on the body outer shell coupling portion 216. From this state, when the lens outer shell 301 is further rotated clockwise by, for example, 5 ° (10 ° from the state shown in FIG. 7A), as shown in FIG. 7C, the lens outer shell coupling portion 316 is formed. Starts to hang on the body outer shell joint 216. From this state, when the lens outer shell 301 is further rotated clockwise, for example, by 40 ° (50 ° from the state shown in FIG. 7A), as shown in FIG. 7D, the lens inner shell coupling portion 317. Hangs up on the body inner shell joint 217 and joins. At this time, the lens outer shell coupling portion 316 has not been hooked on the body outer shell coupling portion 216. Therefore, by further rotating the lens outer shell 301, the lens outer shell coupling portion 316 ends up hanging over the body outer shell coupling portion 216 and is coupled. Note that the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 may be coupled at substantially the same time as the lens outer shell coupling portion 316 and the body outer shell coupling portion 216.

  In this way, a difference is provided between the timing at which the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 start to engage and the timing at which the lens outer shell coupling portion 316 and the body outer shell coupling portion 216 begin to engage. Specifically, the timing at which the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 start engaging is earlier than the timing at which the lens outer shell coupling portion 316 and the body outer shell coupling portion 216 start engaging. As a result, it is possible to prevent the amount of rotation (rotation angle) of the lens inner shell 302 from becoming insufficient and the body inner shell coupling portion 217 and the lens inner shell coupling portion 317 from being incorrectly coupled. Therefore, practicality and convenience can be improved.

  As a result, when the lens barrel 3 is attached to the camera body 2, the amount of rotation (rotation angle) of the lens inner shell 302 is insufficient, and the coupling between the body inner shell mount 224 and the lens inner shell mount 326 becomes insufficient. It prevents you from becoming.

  On the other hand, the engagement angle of the lens inner shell coupling portion 317 with respect to the body inner shell coupling portion 217 may be smaller than the engagement angle of the lens outer shell coupling portion 316 with respect to the body outer shell coupling portion 216. Even in this case, the same purpose can be achieved.

Further, when an actuator is provided and the lens outer shell 301 of the lens barrel 3 is coupled to the body outer shell 201 of the camera body 2, the lens inner shell 302 of the lens barrel 3 of the camera body 2 is triggered by the actuator. It can also be configured to be coupled to the body inner shell 202. Further, the same operation may be executed by using a user's push of a button (not shown) as a trigger.
The above-mentioned mechanisms 1-1 to 1-3 may be configured independently or may be appropriately combined.

(1-4. Holding mechanism for connecting portion)
Further, the camera system 1 is provided with a mechanism (holding mechanism for the joint) that prevents the joint from loosening. For example, when the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 are engaged by a bayonet mechanism, the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 are relatively moved in the optical axis direction. The deviation is unlikely to occur, but the deviation in the rotation direction around the optical axis may occur. Therefore, a mechanism for suppressing the deviation in the rotation direction about the optical axis will be described.
Specifically, the camera system 1 includes an inner shell joint holding mechanism that holds (fixes or locks) the joint between the lens inner shell joint 317 and the body inner shell joint 217. Further, an outer shell coupling holding mechanism that holds (fixes or locks) the coupling between the lens outer shell coupling portion 316 and the body outer shell coupling portion 216 is provided. Therefore, it is possible to prevent the body inner shell 202 and the lens inner shell 302 from deviating from each other in the rotation direction about the optical axis during use of the camera system 1 and being disengaged (engaged). Further, it is possible to prevent the body outer shell 201 and the lens outer shell 301 from being displaced in the rotational direction about the optical axis and disengaged (engaged) during use of the camera system 1. The outer shell bond holding mechanism and the inner shell bond holding mechanism may be of any type, for example, mechanical, electrical or magnetic ones can be used.
Note that this holding mechanism may include only the outer shell coupling holding mechanism. This is because the movable range of the inner shell with respect to the outer shell is regulated to some extent, so that if the outer shell side is firmly coupled (engaged), the possibility that the inner shell side is uncoupled (engaged) is low. .. That is, if the outer shell joint holding mechanism is provided, the inner shell side joint (engagement) can be held. By including the inner shell coupling / holding mechanism, it is possible to suppress the deviation in the rotation direction about the optical axis on the inner shell side.

  Further, the camera system 1 includes a releasing mechanism that releases the coupling between the lens outer shell 301 and the body outer shell 201 by the outer shell coupling holding mechanism. By operating the release mechanism, the lock by the outer shell coupling holding mechanism is released. Further, the lock by the inner shell coupling holding mechanism is also released in conjunction with the operation of the release mechanism. Therefore, the camera system 1 releases the lock by the outer shell coupling holding mechanism by the release mechanism and also releases the lock by the inner shell coupling holding mechanism. Thereby, the lens barrel 3 can be easily attached and detached.

FIG. 8 is a diagram illustrating an example of a mechanism (coupling unit holding mechanism) that prevents loosening of the coupling unit (for example, displacement in the rotation direction about the optical axis). The vertical direction in FIG. 8 is shown as a direction along the optical axis of the lens barrel 3.
Specifically, for example, as shown in FIG. 8A, the outer shell mount coupling pin 231 locks the coupling between the body outer shell coupling portion 216 and the lens outer shell coupling portion 316, and the lens outer shell 301. Is fixed to the body outer shell 201. The outer shell mount coupling pin 231 is biased downward in the figure by a spring 234.

  Further, the inner shell mount coupling pin 232 locks the coupling between the body inner shell coupling portion 217 and the lens inner shell coupling portion 317 to fix the lens inner shell 302 to the body inner shell 202. The inner shell mount coupling pin 232 is biased downward in the drawing by a spring 234.

  Further, an interlocking lever 233 is provided so as to be able to move up and down so as to straddle the outer shell mount connecting pin 231 and the inner shell mount connecting pin 232. The interlocking lever 233 is provided so as to be movable in a direction along the optical axis of the lens barrel 3 (vertical direction in FIG. 8). Here, the outer shell mount coupling pin 231 and the interlocking lever 233 may be fitted together so as to be movable integrally. On the other hand, the inner shell mount connecting pin 232 and the interlocking lever 233 have a sufficient movable range in the radial direction of the inner shell mount connecting pin 232 so that the body inner shell 202 can swing with respect to the body outer shell 201. Are provided and engaged. It should be noted that the interference between the inner shell mount coupling pin 232 and the interlocking lever 233 in the vertical direction in FIG. 8 due to the swing of the body inner shell 202 can be absorbed by the expansion and contraction of the spring 235.

  Then, the interlocking lever 233 is manually operated by the user, for example. That is, when the interlocking lever 233 is moved upward in FIG. 8, the outer shell mount connecting pin 231 is pushed up by the interlocking lever 233 as shown in FIG. 8B, and the body outer shell connecting portion 216 and the lens outer shell are joined together. The outer shell coupling lock that has locked the coupling with the coupling portion 316 is released. At the same time, the inner shell mount connecting pin 232 is also pushed up by the interlocking lever 233, and the inner shell connecting lock that locks the connection between the body inner shell connecting portion 217 and the lens inner shell connecting portion 317 is released.

  Therefore, not only the outer shell coupling lock but also the inner shell coupling lock can be released only by operating the release mechanism, and the lens barrel 3 can be easily attached and detached. Further, when the lens barrel 3 is attached to the camera body 2, the outer shell coupling lock and the inner shell coupling lock are automatically performed only by rotating the lens barrel 3 to a predetermined position. As described above, the practicality and convenience of the camera system 1 can be improved.

  In addition, it is not limited to the outer shell bond holding mechanism and the inner shell bond holding mechanism as described above. For example, the inner shell coupling holding mechanism may be electrically locked by using an actuator or the like. In this case, for example, when the outer shell coupling lock is released by the operation of the release mechanism (for example, the movement of the interlocking lever 233), the actuator is interlocked with the control to release the inner shell coupling lock. Good to do.

(2. Configuration for detecting the coupling of the inner shell mount)
On the outer shell side, the user can easily check the state visually, whereas on the inner shell side, the user cannot visually check it. Therefore, the user cannot visually confirm whether or not the lens inner shell 302 and the body inner shell 202 are properly coupled.
Therefore, the camera system 1 of the present embodiment includes a detection unit that detects (detects) whether or not the inner shells are properly coupled. In other words, a detection unit that detects the engagement state of the inner shells is provided.
As shown in FIGS. 1A, 1B, and 7, the body inner shell 202 is provided with a coupling detection unit 240. Further, the lens inner shell 302 is provided with a coupling detector 340. The bond detector 240 and the bond detector 340 can detect whether or not the inner shells are properly bonded. Such a detector can communicate or be energized.
In a state where the body inner shell 202 and the lens inner shell 302 are not properly coupled (for example, FIGS. 7A, 7B, and 7C), the coupling detection unit 240 and the coupling detection unit 340 are not in contact with each other. ..
On the other hand, in the state where the body inner shell 202 and the lens inner shell 302 are correctly coupled (for example, FIG. 7D), the coupling detection unit 240 and the coupling detection unit 340 are in contact with each other. By contacting the coupling detectors, it is possible to conduct electricity or communicate.
Therefore, when the coupling detection unit 240 and the coupling detection unit 340 come into contact with each other to detect energization or communication, it can be determined that the lens inner shell 302 and the body inner shell 202 are accurately coupled. In addition, when the coupling detection unit 240 and the coupling detection unit 340 are not in contact with each other and no electric current or communication is detected, it can be determined that the lens inner shell 302 and the body inner shell 202 are not accurately coupled. The lens control unit 314 and the body control unit 215 may make such a determination. By providing the coupling detection unit 240 and the coupling detection unit 340, it is possible to determine the coupling state between the body inner shell 202 and the lens inner shell 302, which cannot be determined from the appearance.

FIG. 9 is a flowchart showing the operation of the body control unit 215 regarding the detection of the combined state using the combined detection unit 240 and the combined detection unit 340. The lens controller 314 may perform the operation shown in FIG.
When the power supply of the camera body 2 is turned on and the operation is started, in S310, the body control unit 215 determines whether or not the connection detection unit 240 and the connection detection unit 340 are correctly energized (or communicated), that is, the body. It is determined whether or not the inner shell 202 and the lens inner shell 302 are correctly coupled (engaged). When it is determined in S310 that power is being supplied or communication is being performed (the lens inner shell 302 and the body inner shell 202 are connected), the process proceeds to S320. When it is determined that the power is not applied or the communication is not performed (the lens inner shell 302 and the body inner shell 202 are not coupled), the process proceeds to S340.

In S320, the body control unit 215 continues the operation of the camera system 1. Then, the process proceeds to S330.
In S330, the body control unit 215 determines whether or not the power has been turned off. If the power is not turned off, the process returns to S310, and if the power is turned off, the operation is ended.

  In S340, the body control unit 215 determines whether the mounted lens barrel is a lens barrel having an inner shell. For example, the body control unit 215 receives information about the lens barrel 3 from the lens barrel 3 via the contact 311 included in the lens outer shell 301 and the contact 211 included in the body outer shell 201. The information regarding the lens barrel 3 includes information indicating whether or not the lens barrel has an inner shell. If the information related to the lens barrel 3 includes information indicating that the lens barrel has an inner shell (or information indicating that the lens barrel does not include an inner shell, it must be included). For example, the body control unit 215 determines that the mounted lens barrel has an inner shell, and proceeds to S350. If the information about the lens barrel 3 does not include the information indicating that the lens barrel has the inner shell (or the information indicating that the lens barrel does not include the inner shell). If so, the body control unit 215 determines that the mounted lens barrel has an inner shell, and proceeds to S320.

  Here, when a lens barrel (not shown) having no lens inner shell 302 (for example, a lens barrel used in a conventional camera system) is attached to the camera body 2, this lens barrel is used. Even if it is accurately coupled to the body 2, the coupling detector 340 is not provided in the lens barrel, so that the coupling detector 240 and the coupling detector 340 are not energized or communicated. Even when a lens barrel that does not include such a lens inner shell 302 is attached, it is more convenient to use a mode in which shooting can be performed.

  Therefore, when the lens barrel 3 having the lens inner shell 302 is attached to the camera body 2, the lens barrel 3 is moved to the inside of the lens via the contact points 211 and 311 of the body outer shell 201 and the lens outer shell 301. Information that the shell 302 is provided is transmitted from the lens barrel 3 to the camera body 2. By doing so, the camera body 2 can identify whether or not the mounted lens barrel has the lens inner shell 302. Therefore, not only the lens barrel 3 having the lens inner shell 302 but also the lens barrel not having the lens inner shell 302 may be mounted on the camera body 2, the lens of the lens barrel 3 It becomes possible to properly inform the user whether or not the inner shell 302 is correctly coupled to the body inner shell 202 of the camera body 2, and the lens barrel without the lens inner shell 302 is attached to the camera body 2. It is possible to take a picture even when it is attached.

  In S350, in S310, it is determined that the body inner shell 202 and the lens inner shell 302 are not properly coupled, and it is further determined that the mounted lens barrel has the lens inner shell 302. Is in a state of Therefore, the body control unit 215 notifies the user by sound, display, light or the like that the body inner shell 202 and the lens inner shell 302 are not properly coupled. In addition to the notification, or instead of the notification, the operation of the camera system 1 may be suspended.

  In addition to the above-described operation, when it is detected that the lens inner shell 302 of the lens barrel 3 is coupled to the body inner shell 202 of the camera body 2, the user may be notified of that fact.

  Further, the coupling detecting section (240, 340) is used as a non-coupling detecting section for detecting a state where the coupling between the body inner shell 202 and the lens inner shell 302 is released, that is, a non-coupling state. You can also In this case, for example, when it is detected that the inner shell 202 of the body and the inner shell 302 of the lens are disconnected, the fact can be notified to the user by sound, display, light or the like.

(3. Forced release mechanism)
In the camera system 1, even if the lens inner shell 302 is firmly attached to the body inner shell 202 for some reason and is difficult to remove, the camera body 2 and the lens barrel 3 can be removed. It also has a forced release mechanism. Here, when the lens inner shell 302 is firmly attached to the body inner shell 202, for example, the lens inner shell joint 317 is attached to the body inner shell joint 217 in an abnormal state such as deformation. It may be difficult to remove. Further, when the camera system 1 is dropped while the lens barrel 3 is attached to the camera body 2, the body inner shell 202 or the lens inner shell 302 is slanted with respect to the body outer shell 201 or the lens outer shell 301. It is possible that the lens barrel 3 is attached and it becomes difficult to remove the lens barrel 3. In such a case, if no countermeasure (for example, the forced release mechanism in this embodiment) is provided, the lens inner shell 302 and the body inner shell 202 are not coupled even if the lens outer shell 301 is rotated. It may not be released. In that case, the lens barrel 3 cannot be removed from the camera body 2.

Therefore, in the camera system 1 of the present embodiment, the lens inner shell 302 is directly rotated from the outside of the lens outer shell 301 to release the coupled state between the body inner shell 202 and the lens inner shell 302 (forced release). Mechanism).
FIG. 10 is a diagram showing an outline of the uncoupling mechanism.
As shown in FIG. 10, this uncoupling mechanism includes an operation pin 303 that can be freely moved up and down (movably in the radial direction of the lens outer shell 301) in an elongated hole 301a of the lens outer shell 301, and a lens. And a fitting hole 302a formed on the surface of the inner shell 302. Here, the elongated hole 301a is formed so as to extend along the circumferential direction (rotational direction) of the lens outer shell 301.

  Therefore, when the lens inner shell 302 is firmly attached to the body inner shell 202 and the lens inner shell 302 does not rotate even when the lens outer shell 301 is rotated, the operation pin 303 is attached and the lens inner shell 302 is attached. The lens inner shell 302 can be forcibly rotated by fitting it into the fitting hole 302a of FIG. 2 and moving the operation pin 303 in the circumferential direction of the lens outer shell 301 in that state. Therefore, the reliability of the camera system 1 is improved, and it becomes easy to deal with it in an emergency.

  Although the operation pin 303 has been described as an example prepared as a component separate from the lens barrel 3, it may be an accessory integrally attached to the lens barrel 3. Further, a lid may be provided so as to hide the existence of the long hole 301a.

(4. Other mount configurations to replace the bayonet)
In the above description, the lens inner shell coupling portion 317, the lens outer shell coupling portion 316, the body inner shell coupling portion 217, and the body outer shell coupling portion 216 have been described as an example in which they have a bayonet shape. However, the form of the mount is not limited to the bayonet type, and other configurations may be used. For example, a pin, a spring, a magnet, etc. may be mentioned.
FIG. 11 is a diagram showing a modification of the mount configuration on the inner shell side.
In this modified embodiment, a pin engagement method is adopted instead of the above-mentioned bayonet method.

  That is, the body inner shell mount 224 has an annular mount body 224f, as shown in FIG. Two locking holes 224d are formed on the circumference of the mount body 224f at 180 ° intervals. Further, two arc-shaped magnets 224e are embedded in the mount body 224f at 180 ° intervals so as to be located between the two locking holes 224d.

  On the other hand, the lens inner shell mount 326 has an annular mount body 326f, as shown in FIG. Two recesses 326b are formed on the circumference of the mount body 326f at 180 ° intervals corresponding to the two locking holes 224d of the body inner shell mount 224. A cylindrical (so-called bullet-shaped) engagement pin 326d having a hemispherical tip is attached to each of the recesses 326b so as to be elastically advanceable and retractable via a coil spring 326c.

  In such a pin engagement type body inner shell mount 224 and lens inner shell mount 326, the lens inner shell mount 326 is mounted on the body inner shell mount 224 by engaging the two engaging pins 326d with the two recesses 326b. The lens inner shell mount 326 can be fixed to the body inner shell mount 224 by the magnetic force of the magnet 224e in a state where it is positioned at a predetermined position. As a result, the lens inner shell 302 of the lens barrel 3 and the body inner shell 202 of the camera body 2 can be coupled with high accuracy and easily.

  Like the bayonet method, such a pin engagement method is mechanical and not electrical, so that the battery 212 is inadvertently cut off and the lens inner shell mount 326 is removed from the body inner shell mount 224. There is an advantage that the inconvenience of dropping out can be avoided in advance.

  The pin engagement method is not limited to the connection between the body inner shell mount 224 and the lens inner shell mount 326, but may be adopted for the connection between the body outer shell mount 210 and the lens outer shell mount 310.

(5. Contact structure)
In the camera system 1 of the present embodiment, as described above, the contact 211 for communication or energization is provided at the subject side end of the body outer shell 201. Further, a contact 311 for communication or energization is provided at the end of the lens outer shell 301 on the body side. Therefore, the electric signals and the electric power can be exchanged between the camera body 2 and the lens barrel 3 on the outer shell side. As a result, even when a conventional camera system that does not include the lens inner shell 302 or the body inner shell 202 is coupled to the lens outer shell 301 or the body outer shell 201, it is possible to communicate or energize with the conventional camera system. Is. Therefore, the conventional camera system can be attached to and detached from the camera system 1 for use.
Further, since the yaw drive unit 312 or the pitch drive unit 322 is provided in the lens outer shell 301, the camera body 2 and the lens barrel 3 are connected to the outer shell side where the yaw drive unit 312 or the pitch drive unit 322 is arranged. If electric signals and electric power are exchanged between the two, it is possible to minimize the number and size of FPCs and the like inside. When the FPC is arranged between the inner shell and the outer shell, the swing of the inner shell becomes a load. Therefore, reducing the FPC has a great effect in the camera system 1. ..

  Further, since the contact 311 is provided on the lens outer shell 301 in the lens barrel 3 of the camera system 1, this lens barrel is used even for a camera body (not shown) that does not have the body inner shell 202. 3 can be attached and used. At this time, in the lens barrel 3, by locking the lens inner shell 302 to the lens outer shell 301 by the above-described lens locking mechanism, it is possible to prevent the occurrence of a situation in which the optical axis of the lens unit L shakes. You can

  In this case, if the shift direction vibration isolation system 330 is provided to the lens barrel 3 of the camera system 1, the lens shake correction can be executed even when the camera barrel is not equipped with the body inner shell 202. it can. If the image pickup device shake correction is performed by driving the image pickup device to any one of pitch, yaw, roll, and shift, shake correction can be performed. Further, when the lens barrel 3 of the camera system 1 does not have such a function, it may be possible to drive the entire lens inner shell 302 of the lens barrel 3 to execute blur correction.

  Although the contact 311 and the contact 211 have been described as being provided on the outer shell side, they may be provided on the inner shell side. It may be provided on the outer shell side and the inner shell side. Since the zoom actuator that drives the lens group L is provided in the lens inner shell 302, it is preferable to use the contacts 211 and 311 provided on the inner shell side for information regarding the driving of the zoom actuator. In this way, it is preferable that the contact on the side (inner shell side or outer shell side) on which the object to be controlled is provided transmits and receives information necessary for the control.

(Other configurations)
The lens barrel 3 of the camera system 1 is configured so that the lens inner shell 302 does not protrude rearward (on the camera body 2 side) from the lens outer shell 301 along the optical axis direction. Therefore, even when the lens inner shell 302 is attached to a camera body that does not include the body inner shell 202, the lens inner shell 302 may interfere with components (mirror, shutter, etc.) of the camera body not only when it is attached but also when blurring is corrected. Absent. Further, when the lens barrel 3 is attached to a camera body that does not include the body inner shell 202, the entire lens inner shell 302 is moved forward (toward the subject) by an actuator (not shown), It is also possible that the shell 302 does not interfere with the parts of the camera body.

  On the other hand, in the camera body 2 of the camera system 1, the contacts 211 are provided on the body outer shell 201. Therefore, a lens barrel (not shown) that does not include the lens inner shell 302 can be attached to the camera body 2 for use. At this time, in the camera body 2, by locking the body inner shell 202 to the body outer shell 201 by the above-described body lock mechanism, it is possible to prevent occurrence of a situation where the position of the image pickup element 220 is deviated. ..

  The camera body 2 of the camera system 1 is configured so that the body inner shell 202 does not project forward (toward the subject) from the body outer shell 201 along the optical axis direction. Therefore, even when a lens barrel having no lens inner shell 302 is mounted, the body inner shell 202 is a component of the lens barrel (the rearmost part of the lens group L (camera There is no risk of interfering with a lens located on the body 2 side). In addition, when a lens barrel having no lens inner shell 302 is attached to the camera body 2, the entire body inner shell 202 is moved backward by an actuator (not shown), so that the body inner shell 202 becomes a lens. It is also possible not to interfere with the parts of the lens barrel.

(Second embodiment)
FIG. 12A is a system configuration diagram of a camera system 1 including the lens barrel 3 of the second embodiment and a camera body 2. FIG. 12B is a diagram showing a simplified system configuration of the camera system 1 including the lens barrel 3 of the second embodiment and the camera body 2. Note that, similar to the relationship between FIG. 1A and FIG. 1B described above, FIGS. 12A and 12B show the same camera system 1. Therefore, these drawings show, for example, a configuration not included in one of the drawings. Shall complement on the other hand, and these shall complement each other.
In the camera system 1 according to the second embodiment, as shown in FIGS. 12A and 12B, the contact 211 on the camera body 2 side is provided on the body inner shell 202 instead of the body outer shell 201. The body control unit 215 is provided in the body inner shell 202 of the camera body 2 instead of the body outer shell 201.
Further, the contact 311 on the lens barrel 3 side is provided on the lens inner shell 302 instead of the lens outer shell 301. The lens control unit 314 is provided in the lens inner shell 302 instead of the lens outer shell 301 of the lens barrel 3.
Since other configurations are basically the same as those of the above-described first embodiment, the same members are designated by the same reference numerals and the description thereof will be omitted.

  The second embodiment has the same effects as the above-described first embodiment. In addition to this, in the second embodiment, since the contact 211 and the contact 311 are provided on the body inner shell 202 and the lens inner shell 302, respectively, the electrical parts installed on the lens inner shell 302 (for example, for zooming). The electric power can be supplied from the battery 212 to the actuator, the shift direction vibration isolation system 330, etc.) without going through the FPC, and the FPC can be reduced accordingly. Further, an electric signal can be transmitted / received to / from an electric component installed in the lens inner shell 302 without using an FPC, and the FPC can be reduced accordingly. As a result, the degree of freedom of the lens inner shell 302 with respect to the lens outer shell 301 of the lens barrel 3 (the size of the swing range) can be increased, and failures due to FPC can be reduced.

  Since the contact points 211 and 311 are provided in the number corresponding to the amount of communication, it is possible to appropriately perform transmission and reception of electric signals with the electric parts installed in the lens inner shell 302.

(Variation)
The present invention is not limited to the embodiment described above, and various modifications and changes are possible.

(1) In the above-described embodiment, the case where the body outer shell 201 and the body inner shell 202 are electrically connected by the FPC in the camera body 2 has been described. However, an electric signal may be transmitted and received between the body outer shell 201 and the body inner shell 202 using Wi-Fi (Wireless Fidelity), near field communication, or other wireless communication.

(2) In the above-described embodiment, the case where the lens outer shell 301 and the lens inner shell 302 are electrically connected by the FPC in the lens barrel 3 has been described. However, electric signals may be transmitted and received between the lens outer shell 301 and the lens inner shell 302 using Wi-Fi, near field communication and other wireless communication.

(3) In the above-described embodiment, the bayonet type or the pin engaging type mount is described. However, these methods and other methods (magnets, springs, etc.) may be substituted or used together.

(5) In the above-described embodiment, an example in which the two actuators of the pitch drive unit 322 and the yaw drive unit 312 are provided for performing integrated drive shake correction has been described. Not limited to this, for example, an actuator that can be driven in both the pitch direction and the yaw direction may be used. In that case, the housing 320 may not be omitted.

(6) In the above-described embodiment, an example in which the lens barrel 3 includes the pitch drive unit 322 and the yaw drive unit 312 has been described. The invention is not limited to this, and the camera body 2 may include the pitch driving unit 322 or the yaw driving unit 312. Both drive units may be provided in the camera body 2, or one drive unit may be provided in the camera body 2 and the other drive unit may be provided in the lens barrel 3.

(7) In the above-described embodiment, it has been described that the lens inner shell 302 and the body inner shell 202 are driven in the pitch direction or the yaw direction to perform blur correction. The present invention is not limited to this, and the lens inner shell 302 and the body inner shell 202 may be driven in the shift direction to perform blur correction. In this case, instead of the pitch drive unit 322 and the yaw drive unit 312, a drive unit that can be driven in the shift direction is provided to drive the lens inner shell 302 or the housing 320 in the shift direction.

(8) In the above-described embodiment, the lens barrel 3 has been described as having an integrated drive shake correction function, a lens shake correction function, and an image sensor shake correction function. Not limited to this, for example, a configuration including at least one of integrated drive blur correction, lens blur correction, or image sensor blur correction, or a configuration including a plurality of blur corrections may be used.

(9) In the above-described embodiment, an example in which the blur detection unit 325 is provided has been described, but there may be a plurality of blur detection units. Any one of the plurality of blur detection units may be provided in the lens outer shell 301, the body inner shell 202 or the body outer shell 201.

  It should be noted that the respective embodiments and modifications may be combined in any manner. Further, the present invention is not limited to the embodiments described above.

1 camera system 2 camera body 3 lens barrel 201 body outer shell 202 body inner shell 210 body outer shell mount 211 contacts 212 battery 213 operation member 214 display unit 215 body control unit 216 body outer shell coupling unit 217 body inner shell coupling unit 218 Image processing unit 220 Image sensor 223 Image sensor drive unit 224 Body inner shell mount 224c Guide member 224d Locking hole 224e Magnet 224f Mount body 231 Outer shell mount coupling pin 232 Inner shell mount coupling pin 233 Interlocking lever 240 Coupling detection unit 241 Claw portion 242 Claw portion 301 Lens outer shell 301a Long hole 302 Lens inner shell 302a Fitting hole 303 Operation pin 310 Lens outer shell mount 311 Contact point 312 Yaw drive unit 313 Yaw direction rotation detection unit 314 Lens control unit 315 Operation member 16 lens outer shell coupling section 317 lens inner shell coupling section 320 housing 322 pitch drive section 323 pitch direction rotation detection section 325 first blur detection section 326 lens inner shell mount 326b recess 326c coil spring 326d engagement pin 326f mount body 330 shift Directional vibration isolation system 332 Shift drive unit 340 Coupling detection unit 401 Motor 402 Worm gear 403 Lock ring 404 Gear unit 405 Gear member 406 Projection 407 Projection L Lens group

Claims (9)

A lens barrel with a detachable camera body,
A first tube having a first engaging portion that engages with the first portion of the camera body;
A second cylinder that is disposed inside the first cylinder and that has a second engagement portion that engages with the second portion of the camera body and an optical system;
The second barrel is a lens barrel having a detection unit that detects an engagement state between the second unit and the second engagement unit. The lens barrel according to claim 1, wherein the detection unit detects the engagement state by communication or energization. The lens barrel according to claim 1 or 2, further comprising a notification unit that notifies the engagement state detected by the detection unit. The lens barrel according to claim 3, wherein the notification unit notifies that the second portion and the second engagement portion are not engaged with each other. The lens barrel according to any one of claims 1 to 4, further comprising a drive unit that drives the second cylinder with respect to the first cylinder. The lens barrel according to claim 5, wherein the drive unit drives the second barrel with respect to the first barrel when the second portion and the second engagement portion are engaged with each other. The lens according to claim 5 or 6, wherein the drive unit does not drive the second cylinder with respect to the first cylinder when the second unit and the second engagement unit are not engaged with each other. Lens barrel. A camera body with a removable lens barrel,
A first housing having a first engaging portion that engages with a first tube of the lens barrel;
A second housing that is disposed inside the first housing and that has a second engaging portion that engages with the second cylinder of the lens barrel and an optical system;
The second housing is a camera body having a detection unit that detects an engagement state between the second cylinder and the second engagement unit. A camera system in which a camera body and a lens barrel are detachable,
The camera body is
A first housing,
A second housing having an image sensor,
The lens barrel is
A first tube that engages with the first housing;
A second cylinder having an optical system and engaging with the second casing;
A camera system in which the camera body or the lens barrel has a detection unit that detects an engagement state between the second housing and the second barrel.

Images