WO2018198259A1

WO2018198259A1 - Lens barrel, camera body, camera system

Info

Publication number: WO2018198259A1
Application number: PCT/JP2017/016642
Authority: WO
Inventors: 戸川　久憲; 拓海中野; 宏樹瀧田; 茉理絵下山
Original assignee: 株式会社ニコン
Priority date: 2017-04-26
Filing date: 2017-04-26
Publication date: 2018-11-01
Also published as: JPWO2018198259A1; JP6897766B2

Abstract

A camera system and a lens barrel are provided in an exchangeable-lens camera comprising a shake correction mechanism that integrally drives the lens barrel and an imaging unit, it being possible for lenses to be smoothly exchange, and greater utility and convenience to be obtained. A lens barrel, to and from which a camera body can be attached or detached, wherein the lens barrel comprises: a first barrel having a first engagement part that engages with a first part of the camera body; a second barrel disposed inside the first barrel, the second barrel having a second engagement part that engages with a second part of the camera body, and an optical system; and a retention mechanism that retains the engagement state between the first engagement part and the first part, and the engagement state between the second engagement part and the second part.

Description

Lens barrel, camera body, camera system

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

2. Description of the Related Art Conventionally, in order to correct a wide range of blur correction angles in an imaging device capable of shooting a moving image, a lens barrel integrated with an imaging unit can be swung with respect to the outer frame of the imaging device, and is orthogonal to the optical axis. There is a blur correction mechanism including two drive units having a support shaft (see Patent Document 1).

On the other hand, in the interchangeable lens camera, it is necessary to be able to attach and detach the lens barrel with respect to the camera body when the lens is replaced.

JP 2013-140285 A

The lens barrel of the present invention is a lens barrel to which a camera body can be attached and detached. A second cylinder having a second engaging portion and an optical system that are engaged with the second portion of the camera body, an engagement state of the first engaging portion and the first portion, and And a holding mechanism for holding the engaged state between the second engaging portion and the second portion.
The camera body of the present invention is a camera body to which a lens barrel can be attached and detached, and includes a first housing having a first engagement portion that engages with the first barrel of the lens barrel, and the first casing. A second housing having a second engaging portion and an optical system which are disposed inside the housing and engage with the second tube of the lens barrel; and the first engaging portion and the first tube An engagement state and a holding mechanism for holding the engagement state between the second engagement portion and the second cylinder are provided.
The camera system of the present invention is a camera system in which a camera body and a lens barrel are detachable, and the camera body includes a first housing and a second housing having an image sensor, The lens barrel includes: a first cylinder that engages with the first casing; and a second cylinder that has an optical system and engages with the second casing, and the camera body or the lens mirror. The cylinder is configured to have a holding mechanism that holds the engagement state between the first casing and the first cylinder and the engagement state between the second casing and the second cylinder.

1 is a system configuration diagram of a camera system 1 including a lens barrel 3 and a camera body 2 according to a first embodiment. It is the figure which simplified and showed the system configuration | structure of the camera system 1 provided with the lens barrel 3 and camera body 2 of 1st Embodiment. It is a flowchart which shows the process which the body control part 215 performs. It is a flowchart which shows the process which the lens control part 314 performs. 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. It is a figure explaining an example of the body lock mechanism which locks the body inner shell 202 with respect to the body outer shell 201. FIG. 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 (locking mechanism of a mount) which prevents the bayonet mount from loosening. 12 is a flowchart showing an operation of the body control unit 215 related to detection of a connection state using the connection detection unit 240 and the connection detection unit 340. It is a figure which shows the outline | summary of a coupling release mechanism. It is a figure which shows the deformation | transformation form of the mount structure by the inner shell side. It is a system configuration figure of camera system 1 provided with lens barrel 3 and camera body 2 of a 2nd embodiment. It is the figure which simplified and showed the system configuration | structure 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.
In the following description, in order to facilitate understanding, terms such as a pitch axis P, a yaw axis Y, and a roll axis R are used as necessary. In the embodiment, the pitch axis P is a position of the camera body 2 (hereinafter referred to as a normal position) when the photographer takes a horizontally long image with the optical axis horizontal when the lens barrel 3 is attached to the camera body 2. ) In the horizontal 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. Note that “orthogonal” includes not only strictly 90 degrees but also a range slightly deviated from 90 degrees due to manufacturing errors and assembly errors.
Further, the rotation around the pitch axis P is pitched, the rotation around the yaw axis Y is yawing, and the rotation around the roll axis R is rolling. Further, the pitching direction is the pitch direction, the yawing direction is the yaw direction, and the rolling direction is the roll direction.
A direction along the pitch axis P or a direction along the yaw axis Y is defined as a shift direction.

(First embodiment)
FIG. 1A is a system configuration diagram of a camera system 1 including a lens barrel 3 and a camera body 2 according to the first embodiment. FIG. 1B is a diagram illustrating a simplified system configuration of a camera system 1 including the lens barrel 3 and the camera body 2 according to the first embodiment. 1A and 1B show the same camera system 1, these drawings are supplemented on the other side, for example, for configurations not included in one figure, and they complement each other. To do.
The camera system 1 may be a zoomable system or a system that cannot zoom.

(Lens barrel 3)
The lens barrel 3 of this embodiment is detachable from the camera body 2. The lens barrel 3 can be expanded and contracted between a contracted state (non-photographed state, a stored state, a retracted state) and an extended state (photographed state).
As shown in the system configuration diagram of FIGS. 1A and 1B, the lens barrel 3 includes a lens inner shell 302 that holds a lens group L that is an imaging optical system inside, and a housing that is disposed on the outer periphery of the lens inner shell 302. 320 and a lens outer shell 301 (for example, a fixed cylinder) disposed 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 can rotate 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 outer shape of the lens barrel 3 as a whole is cylindrical, the lens inner shell, the lens outer shell, and the housing may be cylindrical. However, a flat portion may be provided on the inner peripheral surface or the outer peripheral surface for arranging other components. In addition, the shape of the lens inner shell, lens outer shell, and housing may be modified by forming a flat portion, a notch, a portion whose thickness changes, or the like as appropriate. Instead of a cylindrical shape, a shape such as a quadrangular prism may be used.

(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 blur detection unit 325, and a lens inner shell mount 326.
In addition, the lens inner shell 302 includes a part of a pitch driving unit 322 that drives the lens inner shell 302 in the pitch direction with respect to the housing 320.

The lens group L is an imaging optical system that forms a subject image on the image sensor 220 disposed in the camera body 2. The lens group L includes an anti-vibration optical system LB. The image stabilizing 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 are provided. An example of the shift drive unit 332 is a voice coil motor (VCM). The image stabilization optical system LB is driven by the shift drive unit 332 in a direction that cancels image blur of the subject image caused by camera shake of the photographer, and image blur is corrected.

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

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

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

The pitch direction rotation detection unit 323 detects the rotation amount of the lens inner shell 302 in the pitch direction. In other words, the pitch direction rotation detection unit 323 detects the drive amount of the pitch drive unit 322. The pitch direction rotation detection unit 323 detects the rotation amount of the lens inner shell 302 (or the driving amount of the pitch driving unit 322), thereby determining whether the lens inner shell 302 (or the pitch driving unit 322) is driven accurately. can do. The housing 320 includes a part of a 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 this, 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 operation 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 detection unit 313 detects the rotation of the housing 320 in the yaw direction. 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 driven accurately. Can do. 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. The lens outer shell mount 310 has a shape including a lens outer shell coupling portion 316.
The lens control unit 314 controls the shift driving unit 332, the pitch driving unit 322, and the yaw driving unit 312. In addition, when the user operates an operation member 315 described later, the lens control unit 314 moves the lens group L in the optical axis direction and changes the focal length.
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 referred to as 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 driver 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 light incident from the imaging optical system (lens group L) and converts it into an electrical signal. The image sensor driving unit 223 drives the image sensor 220 to perform blur correction. The body inner shell mount 224 has a shape including a body inner shell coupling portion 217 and is in contact with the lens inner shell mount 326. Further, it has a combination detection unit 240. Details will be described later.

The body control unit 215 performs shake correction calculation and control, which will be described later. Various controls are performed based on the input of the operation member 213 and the like. The image processing unit 218 performs image processing on the image data output from the image sensor 220.

The body outer shell mount 210 includes a contact 211 for communication or energization. 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 related to various settings. The operation member 213 is operated by the user.
The body outer shell 201 and the body inner shell 202 are electrically connected by wiring such as 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 replaced, and the lens inner shell 302 and the body inner shell 202 are integrated into a shake correction operation (hereinafter, integrated). Drive blur correction).
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 combined and integrated. In this state, when the shake detection unit 325 detects a shake in the pitch direction or the yaw direction, based on the output signal, the lens control unit 314 causes the yaw drive unit 312 and the direction to cancel the shake detected by the shake detection unit 325 and The pitch drive unit 322 is driven. As a result, blur correction is executed. The image blur of the subject image caused by the camera shake of the photographer is corrected. Further, lens shift blur correction using the shift direction image stabilization system 330 can be performed simultaneously or selectively. Furthermore, the blur correction performed by driving the image sensor 220 in any one of the shift direction, the pitch direction, the yaw direction, and the roll direction by a driving unit (not shown) may be performed simultaneously or selectively.

The blur correction in this embodiment will be described in detail.
FIG. 2 is a flowchart showing 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: A blur correction performed by driving the lens inner shell 302 and the body inner shell 202 together.
(2) Lens blur correction: A blur correction performed by the shift direction image stabilization system 330. The image stabilizing optical system LB is driven in the shift direction to correct image blur.
(3) Image sensor blur correction: blur correction performed by moving the image sensor 220.
When the operation 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 through image is being displayed or a moving image is being captured. If a through image is being displayed or if a moving image is being shot, the process proceeds to S120. If neither the live view display nor the moving image shooting is performed, the process proceeds to S160.

In S120, the body control unit 215 determines whether the shake correction mode is the integral drive shake correction mode, the lens shake correction mode, or the image sensor shake correction mode. Thereby, the operation content of the subsequent blur correction is determined. For example, the body control unit 215 determines the shake correction mode based on the mode set by the user. Alternatively, the body control unit 215 may automatically determine based on the blur size detected by the blur detection unit 325. Alternatively, when both the camera body 2 and the lens barrel 3 are systems having an inner shell, it is determined as an integral driving blur correction mode, and when at least one of them is a system without an inner shell, lens blur correction is performed. The mode or the image sensor blur correction mode may be determined.

In S130, the body control unit 215 determines whether or not the shake detection unit 325 detects a shake. The shake detected by the shake detection unit 325 is acquired by the body control unit 215 of the camera body 2 via the contact 311 and the contact 211. Note that the timing at which the body control unit 215 acquires the blur detected by the blur detection unit 325 is not limited to 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 direction blur, yaw direction blur, roll direction blur, and shift direction blur. Blur in all directions may be detected, or blur in multiple directions may be detected. Here, as to whether or not blur is detected, for example, it is determined that blur is detected when the output value of the blur detection unit 325 is equal to or greater than a certain value. If the blur detection unit 325 detects at least one of pitch direction blur, yaw direction blur, roll direction blur, and shift direction blur, the process proceeds to S140. If the shake detection unit 325 detects neither a shake in the pitch direction, a shake in the yaw direction, a shake in the roll direction, or a shift in the shift direction, the process proceeds to S150.

In S <b> 140, the body control unit 215 transmits a shake correction instruction to the lens barrel 3.
The blur correction instruction performed in S190 is an instruction corresponding to the blur correction mode confirmed in S120. Specifically, when the shake correction mode is the integral drive shake 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 direction of how much the yaw driving unit 312 and the pitch driving unit 322 are driven in which direction, and calculates and transmits to the lens barrel 3 based on the shake detected in S130.
If the shake correction mode is the lens shake correction mode in S120, the body control unit 215 transmits 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 blur amount detected in S130 and transmitted to the lens barrel 3.
If the blur correction mode is the image sensor blur correction mode in S120, the body control unit 215 drives the image sensor driving unit 223. By driving the image sensor driving unit 223, the image sensor 220 can be driven in any one of the pitch direction, the yaw direction, the roll direction, and the shift direction. This corrects image blur. When the blur correction mode is the image sensor blur correction mode, it is not necessary to transmit a blur correction instruction to the lens barrel 3, and the body control unit may control the image sensor driving unit 223.
The lens control unit 314 performs control to drive each actuator (the yaw drive unit 312, the pitch drive unit 322, and the shift drive unit 332 included in the shift direction image stabilization system 330) according to an instruction 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 regarding the installation position of the blur detection unit 325, the gravity center 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, a parameter for a blur correction instruction necessary for each blur correction is calculated and transmitted to the lens control unit 314. Note that the lens controller 314 may perform the blur correction calculation.

In S150, the body control unit 215 determines whether the power is turned off. If the power is not turned off, the process returns to S110, and if the power is turned off, the operation is terminated.

In S160, the body control unit 215 determines whether a still image is being displayed. If a 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 displaying the still image and returns to S150.

FIG. 3 is a flowchart illustrating processing performed by the lens control unit 314.
In S210, the lens control unit 314 determines whether or not a 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. If a shake correction instruction has been received, the process proceeds to S220. If a shake correction instruction has not been received, the process proceeds to S230.

In S220, the lens control unit 314 performs the shake correction operation by driving each actuator in accordance with the shake correction instruction. Note that in S220, information on which actuator is driven 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 is terminated.

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 this embodiment includes the lens outer shell coupling portion 316 provided in the lens outer shell 301 and the lens inner shell coupling portion 317 provided in the lens inner shell 302. . The camera body 2 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 connecting 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 (may be engaged) or separable. These couplings or separations are performed at 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 attaches the lens outer shell 301 of the lens barrel 3 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. As the lens outer shell 301 rotates with respect to the body outer shell 201, the lens inner shell 302 also rotates. Therefore, 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. Note that the operation of removing the lens barrel 3 is reversed.

Here, the lens inner shell 302 is not fixed with respect to the lens outer shell 301 and 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 with respect 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 lens inner shell 302 and the body inner shell 202 are securely attached and detached. 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 locking mechanism)
As a configuration that enables the lens inner shell 302 and the body inner shell 202 to be attached to and detached from each other, there is a lock 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. 4A shows the locked state, and FIG. 4B shows the unlocked state.

In the example shown in FIG. 4, a DC motor 401 and a 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 disposed between the worm gear 402 and the gear portion 404.

At the time of locking, 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 and presses the protrusion 407 provided on the lens inner shell 302.
Thereby, 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 protrusion 406 provided on the inner peripheral side of the lock ring 403 and the protrusion 407 of the lens inner shell 302 are in a non-contact state, and the lens inner shell 302 is released from being fixed to the lens outer shell 301.
The lock ring 403 may be mechanically rotated in conjunction with the attachment / detachment of the camera body 2 and the lens barrel 3.

Similarly, on the body side, there is a locking mechanism that fixes (locks) the body inner shell 202 to the body outer shell 201 at a predetermined position.
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, claw

portions

241 and 242 driven by an actuator (not shown) are provided on the body outer shell 201. By moving the

claw portions

241 and 242, the locked state and the unlocked state can be switched. The

claw portions

241 and 242 may be mechanically moved in conjunction with the attachment / detachment of the camera body 2 and the lens barrel 3.

In the following description, a mechanism that locks the lens inner shell 302 with respect to the lens outer shell 301 at a predetermined position is referred to as a lens lock mechanism, and a mechanism that locks the body inner shell 202 with respect to the body outer shell 201 at a predetermined position. This is called a lock mechanism. Such a lens lock mechanism and body lock mechanism may be configured to be mechanically unlocked. For example, the lens lock mechanism and the body lock mechanism are unlocked in conjunction with the attachment / detachment of the lens barrel 3. Alternatively, the lens lock mechanism and the body lock mechanism may be unlocked in conjunction with a switch (not shown). Further, the lens lock mechanism and the body lock mechanism may be configured to 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, and the lens lock mechanism and the body lock mechanism are unlocked. 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 the lens inner shell 302 to swing with respect to the lens outer shell 301, but its movable range is physically (mechanically). Limited. Similarly, the body inner shell 202 has a degree of freedom that can 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 operated or not provided, the rotation of the outer shell side follows the rotation although there is a predetermined degree of freedom. The inner shell is also configured to rotate.

(1-2. Center axis (rotary 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 lens inner shell 302 is in a state where the lens inner shell 302 is dropped by its own weight, or in the lens relative to the lens outer shell 301. A state where the shell 302 is inclined can be considered. If the lens barrel 3 is to be 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 shifted 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 that enables the lens inner shell 302 and the body inner shell 202 to be attached and detached, the rotation axis of the lens inner shell 302 is set to the rotation axis of the lens outer shell 301 when the lens outer shell 301 rotates. An alignment mechanism for alignment will be described.
FIG. 6 is a front view of the axis alignment mechanism viewed from the subject side in parallel with the optical axis.
As shown in FIG. 6, this axial alignment mechanism is configured such that the lens inner shell coupling portion 317 (for example, the claw portion) is connected to the body inner shell mount 224 as the lens inner shell 302 rotates about its rotation axis. The lens inner shell 302 and the lens outer shell 301 are engaged with each other by rotating while being guided by a guide member 224c provided so that the inner diameter thereof gradually decreases.

The lens inner shell coupling portion 317 engages with the body inner shell coupling portion 217 by this axis alignment mechanism. Therefore, even if the rotation axis of the lens outer shell 301 and the rotation axis of the lens inner shell 302 do not coincide with each other, 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 enhanced.

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 °), so that the body outer shell of the camera body 2 is rotated. The state of engagement with 201 is released. When the lens barrel 3 is rotated in the direction to remove the lens barrel 3, 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 detached from the body outer shell coupling portion 216, and the lens inner shell coupling portion 317 is detached 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. You may match | combine the rotating shaft of an inner shell and an outer shell using the above-mentioned locking mechanism.

(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 correctly coupled. It is possible that it will be in an undisturbed state.

Therefore, a mount rotation amount matching mechanism will be described.
FIG. 7 is a diagram showing a procedure for attaching the lens barrel to the camera body. It is the front view seen from the to-be-photographed object side in parallel with the optical axis.
Before the body outer shell coupling portion 216 and the lens outer shell coupling portion 316 start to engage, the body inner shell coupling portion 217 and the lens inner shell coupling portion 317 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 to hang on. At this time, the lens outer shell coupling portion 316 is not yet engaged with the body outer shell coupling portion 216. When the lens outer shell 301 is further rotated clockwise by, for example, 5 ° (10 ° from the state shown in FIG. 7A) from this state, as shown in FIG. 7C, the lens outer shell coupling portion 316 is obtained. Begins to hang on the body outer shell coupling portion 216. If the lens outer shell 301 is further rotated, for example, by 40 ° (50 ° from the state shown in FIG. 7A) clockwise from this state, as shown in FIG. 7D, the lens inner shell coupling portion 317 is obtained. Is connected to the body inner shell coupling portion 217. At this time, the lens outer shell coupling portion 316 is not over the body outer shell coupling portion 216. Therefore, when the lens outer shell 301 is further rotated, the lens outer shell coupling portion 316 is engaged with the body outer shell coupling portion 216 and coupled. The lens outer shell coupling portion 316 and the body outer shell coupling portion 216 may be coupled to the lens outer shell coupling portion 216 and the body outer shell coupling portion 216 almost simultaneously with the coupling.

Thus, there is a difference 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 start to engage. Specifically, the timing at which the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 start to be engaged is earlier than the timing at which the lens outer shell coupling portion 316 and the body outer shell coupling portion 216 begin to engage. 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 coupling between the body inner shell coupling portion 217 and the lens inner shell coupling portion 317 from being performed correctly. Therefore, practicality and convenience can be improved.

Thereby, 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 coupling between the body inner shell mount 224 and the lens inner shell mount 326 is insufficient. To prevent 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 made 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, an actuator is provided, and when 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 is attached to the camera body 2 as a trigger. It can also be configured to be coupled to the body inner shell 202. Moreover, you may make it perform the same operation | movement by having a user press the button (not shown) as a trigger.
The mechanisms 1-1 to 1-3 described above may be configured independently, or may be combined as appropriate.

(1-4. Holding mechanism of connecting portion)
In addition, the camera system 1 is provided with a mechanism for preventing loosening of the connecting portion (a holding mechanism for the connecting portion). 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 relative relationship between the lens inner shell coupling portion 317 and the body inner shell coupling portion 217 in the optical axis direction is relatively small. Although the deviation hardly occurs, the deviation in the rotation direction about the optical axis may occur. Therefore, a mechanism for suppressing the shift in the rotation direction around the optical axis will be described.
Specifically, the camera system 1 includes an inner shell coupling holding mechanism that holds (fixes, locks) the coupling between the lens inner shell coupling portion 317 and the body inner shell coupling portion 217. Further, an outer shell coupling holding mechanism that holds (fixes, 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 being displaced in the rotational direction around the optical axis during the use of the camera system 1, and the coupling (engagement) from being released. Further, it is possible to prevent the body outer shell 201 and the lens outer shell 301 from being displaced in the rotation direction around the optical axis during use of the camera system 1, and the coupling (engagement) from being released. The outer shell coupling holding mechanism and the inner shell coupling holding mechanism may be of any type, and for example, mechanical, electrical, and magnetic mechanisms can be used.
This holding mechanism may include only the outer shell coupling holding mechanism. Because the movable range of the inner shell with respect to the outer shell is regulated to some extent, if the outer shell side is firmly coupled (engaged), there is a low possibility that the inner shell side coupling (engaged) will be disengaged. . That is, if the outer shell coupling holding mechanism is provided, the inner shell side coupling (engagement) can be held. By providing the inner shell coupling holding mechanism, it is possible to suppress a shift in the rotation direction around the optical axis on the inner shell side.

Furthermore, the camera system 1 includes a release mechanism for releasing the connection 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. In conjunction with the operation of the release mechanism, the lock by the inner shell coupling holding mechanism is also released. 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, attachment / detachment of the lens barrel 3 can be easily performed.

FIG. 8 is a diagram illustrating an example of a mechanism (coupling portion holding mechanism) that prevents loosening of the coupling portion (for example, a shift in the rotational direction around 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 coupling between the body outer shell coupling portion 216 and the lens outer shell coupling portion 316 is locked by the outer shell mount coupling pin 231, 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 and fixes the lens inner shell 302 to the body inner shell 202. The inner shell mount coupling pin 232 is biased downward in the figure by a spring 234.

Furthermore, an interlocking lever 233 is provided so as to be movable up and down so as to straddle the outer shell mount coupling pin 231 and the inner shell mount coupling pin 232. The interlocking lever 233 is provided 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 configured to be fitted so as to be movable integrally. On the other hand, the inner shell mount coupling pin 232 and the interlocking lever 233 have a sufficient movable range in the radial direction of the inner shell mount coupling pin 232 so that the body inner shell 202 can swing relative to the body outer shell 201. Is provided and engaged. Note 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, for example, the user manually operates the interlocking lever 233. That is, when the interlocking lever 233 is moved upward in FIG. 8, as shown in FIG. 8B, the outer shell mount coupling pin 231 is pushed up by the interlocking lever 233, and the body outer shell coupling portion 216 and the lens outer shell. 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 coupling pin 232 is also pushed up by the interlocking lever 233, and the inner shell coupling lock that has locked the coupling between the body inner shell coupling portion 217 and the lens inner shell coupling portion 317 is released.

Therefore, only by operating the release mechanism, not only the outer shell coupling lock but also the inner shell coupling lock can be released, 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. From the above, the practicality and convenience of the camera system 1 can be improved.

Note that the present invention is not limited to the outer shell coupling holding mechanism and the inner shell coupling 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 an operation of the release mechanism (for example, movement of the interlocking lever 233), control is performed to release the inner shell coupling lock using the actuator in conjunction with the release. It is good to do.

(2. Configuration to detect coupling of inner shell mount)
On the outer shell side, the user can easily confirm the state by visual observation, whereas the inner shell side cannot be visually confirmed by the user. Therefore, the user cannot visually confirm whether or not the lens inner shell 302 and the body inner shell 202 are correctly coupled.
Therefore, the camera system 1 of the present embodiment includes a detection unit that detects (detects) whether or not the inner shells are correctly coupled to each other. In other words, a detection unit that detects the engagement state between 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. The lens inner shell 302 is provided with a coupling detection unit 340. The coupling detection unit 240 and the coupling detection unit 340 can detect whether the inner shells are correctly coupled to each other. Such a detection unit can communicate or energize.
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, when 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. The coupling detectors can be energized or communicated by contacting each other.
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. If the coupling detection unit 240 and the coupling detection unit 340 are not in contact with each other and no energization or communication is detected, it can be determined that the lens inner shell 302 and the body inner shell 202 are not accurately coupled. Such a determination may be made by the lens control unit 314 or the body control unit 215. 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 that cannot be determined from the appearance.

FIG. 9 is a flowchart illustrating the 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. The lens control unit 314 may perform the operation shown in FIG.
When the operation of the camera body 2 is turned on and the operation starts, in S310, the body control unit 215 determines whether or not the energization (or communication) of the coupling detection unit 240 and the coupling detection unit 340 is correctly performed, that is, the body It is determined whether or not the inner shell 202 and the lens inner shell 302 are correctly coupled (engaged). If it is determined in S310 that energization or communication is being performed (the lens inner shell 302 and the body inner shell 202 are coupled), the process proceeds to S320. If it is determined that energization or 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 is turned off. If the power is not turned off, the process returns to S310, and if the power is turned off, the operation is terminated.

In S340, the body control unit 215 determines whether or not 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 provided in the lens outer shell 301 and the contact 211 provided 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 is provided with an inner shell (or information indicating that the lens barrel is not provided with an inner shell). The body control unit 215 determines that the attached lens barrel has an inner shell, and proceeds to S350. Further, if the information regarding the lens barrel 3 does not include information indicating that the lens barrel has an inner shell (or information indicating that the lens barrel does not have an inner shell). If so, the body control unit 215 determines that the attached lens barrel has an inner shell, and proceeds to S320.

Here, when a lens barrel (not shown) that does not include the lens inner shell 302 (for example, a lens barrel used in a conventional camera system) is attached to the camera body 2, the lens barrel is used as a camera. Even if it is accurately coupled to the body 2, since the coupling detection unit 340 is not provided in the lens barrel, the coupling detection unit 240 and the coupling detection unit 340 are not energized or communicated. Even when such a lens barrel that does not include the lens inner shell 302 is attached, it is more convenient to use a form that allows photographing.

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 into the lens via the contact 211 and the contact 311 of the body outer shell 201 and the lens outer shell 301. Information indicating 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 attached lens barrel has the lens inner shell 302. Therefore, not only the lens barrel 3 including the lens inner shell 302 but also the lens barrel not including the lens inner shell 302 may be attached to the camera body 2. It is possible to properly notify the user whether the inner shell 302 is accurately coupled to the body inner shell 202 of the camera body 2, and a lens barrel that does not include the lens inner shell 302 is attached to the camera body 2. Even if it is mounted, it is possible to take a picture.

In S350, it is determined in S310 that the body inner shell 202 and the lens inner shell 302 are not properly coupled, and it is further determined that the attached lens barrel is provided with the lens inner shell 302. Is in a state. 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 temporarily 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, it may be notified to the user.

Further, the coupling detection unit (240, 340) is used as a non-coupling detection unit for detecting that 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 coupling between the body inner shell 202 and the lens inner shell 302 is released, the fact can be notified to the user by sound, display, light, or the like.

(3. Forced release mechanism)
The camera system 1 can remove the camera body 2 and the lens barrel 3 even when the lens inner shell 302 is firmly attached to the body inner shell 202 for some reason and is difficult to remove. A forcible release mechanism is further provided. Here, the case where the lens inner shell 302 is firmly attached to the body inner shell 202 means that, for example, the lens inner shell coupling portion 317 is attached to the body inner shell coupling portion 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 inclined with respect to the body outer shell 201 or the lens outer shell 301. It can be considered that the lens barrel 3 is difficult to be removed due to being attached. In such a case, if no countermeasure (for example, a forced release mechanism in the present embodiment) is provided, the lens inner shell 302 and the body inner shell 202 are coupled even if the lens outer shell 301 is rotated. May not be released. In that case, the lens barrel 3 cannot be removed from the camera body 2.

Therefore, the camera system 1 of this embodiment directly rotates the lens inner shell 302 from the outside of the lens outer shell 301 to release the coupling 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 coupling release mechanism.
As shown in FIG. 10, the coupling release mechanism includes an operation pin 303 that can be attached to the elongated hole 301a of the lens outer shell 301 so as to be movable up and down (movable in the radial direction of the lens outer shell 301) as necessary, and a lens. And a fitting hole 302a formed on the surface of the inner shell 302. Here, the long hole 301 a is formed so as to extend along the circumferential direction (rotation 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 moving the operation pin 303 in the circumferential direction of the lens outer shell 301 in this state. Therefore, the reliability of the camera system 1 is improved, and it becomes easy to deal with in an emergency.

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

(4. Other mount configurations to replace 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 with reference to an example of a bayonet shape. However, the mount form is not limited to the bayonet type, and other configurations may be employed. For example, a pin, a spring, a magnet, etc. are mentioned.
FIG. 11 is a diagram showing a modified form of the inner shell side mount configuration.
This modified embodiment employs a pin engagement method in place of the bayonet method described above.

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 intervals of 180 °. In addition, two arc-shaped magnets 224e are embedded in the mount body 224f at intervals of 180 ° so as to be positioned between the two locking holes 224d.

On the other hand, as shown in FIG. 11B, the lens inner shell mount 326 has an annular mount body 326f. In the mount body 326f, two concave portions 326b are formed on the circumference thereof at intervals of 180 ° corresponding to the two locking holes 224d of the body inner shell mount 224. A cylindrical pin (so-called bullet-shaped) engagement pin 326d having a hemispherical tip is attached to each recess 326b via a coil spring 326c so as to be able to move forward and backward.

In such a pin-engagement type body inner shell mount 224 and lens inner shell mount 326, the lens inner shell mount 326 is attached to the body inner shell mount 224 by engaging the two engaging pins 326 d with the two recesses 326 b. Then, the lens inner shell mount 326 can be fixed to the body inner shell mount 224 by the magnetic force of the magnet 224e. 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 easily combined with high accuracy.

Such a pin engagement method is mechanical and not electrical like the bayonet method, so the battery 212 is cut carelessly 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 off can be avoided in advance.

Note that this 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 configuration)
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 body side end of the lens outer shell 301. Therefore, the transmission and reception of electric signals and electric power between the camera body 2 and the lens barrel 3 can be performed entirely on the outer shell side. Accordingly, 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, communication or energization with the conventional camera system is possible. It is. Therefore, the conventional camera system can be used by being attached to and detached from the camera system 1.
Further, since the yaw driving unit 312 or the pitch driving unit 322 is provided in the lens outer shell 301, the camera body 2 and the lens barrel 3 are arranged on the outer shell side where the yaw driving unit 312 or the pitch driving unit 322 is arranged. The number and size of FPCs and the like in the interior can be minimized if the electrical signals and power are exchanged between them. If the FPC is arranged between the inner shell and the outer shell, it is a load for the oscillation of the inner shell. Therefore, reducing the FPC has a great effect in the camera system 1. .

Further, since the lens barrel 3 of the camera system 1 is provided with the contact 311 on the lens outer shell 301, this lens barrel can be applied to a camera body (not shown) that does not include the body inner shell 202. 3 can be used. At this time, in the lens barrel 3, the lens inner shell 302 is locked to the lens outer shell 301 by the lens lock mechanism described above, thereby preventing the occurrence of a situation where the optical axis of the lens unit L is blurred. Can do.

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

In addition, although the contact 311 and the contact 211 demonstrated the structure provided in the outer shell side, you may be provided in the inner shell side. It may be provided on the outer shell side and the inner shell side. Since the zoom actuator for driving 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 on driving the zoom actuator. In this way, information necessary for the control may be transmitted and received at the contact point on the side (inner shell side or outer shell side) where the object to be controlled is provided.

(Other configurations)
The lens barrel 3 of the camera system 1 is configured so that the lens inner shell 302 does not protrude rearward (camera body 2 side) from the lens outer shell 301 along the optical axis direction. For this reason, there is a possibility that the lens inner shell 302 may interfere with camera body components (mirror, shutter, etc.) not only when attached to a camera body that does not include the body inner shell 202 but also during shake correction. 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 (subject side) by an actuator (not shown), so that It is also possible to prevent the shell 302 from interfering with parts of the camera body.

On the other hand, the camera body 2 of the camera system 1 is provided with a contact 211 on the body outer shell 201. Therefore, a lens barrel (not shown) that does not include the lens inner shell 302 can be used by being mounted on the camera body 2. At this time, in the camera body 2, by causing the body inner shell 202 to be locked to the body outer shell 201 by the body lock mechanism described above, it is possible to prevent the occurrence of a situation where the position of the image sensor 220 is blurred. .

The camera body 2 of the camera system 1 is configured such that the body inner shell 202 does not protrude forward (subject side) from the body outer shell 201 along the optical axis direction. Therefore, even when a lens barrel that does not include the lens inner shell 302 is attached, the body inner shell 202 is a part of the lens barrel (the rearmost of the lens group L (camera There is no possibility of interfering with a lens or the like located on the body 2 side). Further, when a lens barrel that does not include the lens inner shell 302 is attached to the camera body 2, the body inner shell 202 is moved to the lens by moving the entire body inner shell 202 backward by an actuator (not shown). It is also possible to prevent interference with the lens barrel components.

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

In the second embodiment, the same effects as the first embodiment described above are achieved. In addition, 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, electrical components (for example, for zooming) installed on the lens inner shell 302 are provided. Electric power can be supplied from the battery 212 to the actuator, the shift direction image stabilization system 330, etc. without going through the FPC, and the FPC can be reduced by that amount. In addition, electrical signals can be transmitted to and received from the electrical components installed in the lens inner shell 302 without going through the FPC, and the FPC can be reduced accordingly. As a result, it is possible to increase 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) and to reduce failures due to FPC.

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

(Deformation)
Various modifications and changes are possible without being limited to the embodiments described above.

(1) In the above-described embodiment, the case where the body outer shell 201 and the body inner shell 202 are electrically connected by FPC in the camera body 2 has been described. However, electrical signals may be transmitted and received between the body outer shell 201 and the body inner shell 202 using Wi-Fi (Wireless-Fidelity), proximity communication, and 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 FPC in the lens barrel 3 has been described. However, electrical signals may be transmitted and received between the lens outer shell 301 and the lens inner shell 302 using Wi-Fi, proximity communication, and other wireless communication.

(3) In the above-described embodiment, the bayonet type or pin engagement type mount has been described. However, these methods and other methods (magnet, spring, etc.) may be substituted or used in combination.

(5) In the above-described embodiment, an example in which two actuators of the pitch driving unit 322 and the yaw driving unit 312 are provided to perform the integral driving blur correction has been described. 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 be omitted.

(6) In the above-described embodiment, the example in which the lens barrel 3 includes the pitch driving unit 322 and the yaw driving unit 312 has been described. However, 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, 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 blur correction is performed by driving the lens inner shell 302 and the body inner shell 202 in the pitch direction or the yaw direction. 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 example in which the lens barrel 3 has the functions of the integral drive blur correction, the lens blur correction, and the image sensor blur correction has been described. For example, the configuration may include at least one of integrated drive blur correction, lens blur correction, and image sensor blur correction, or may include a plurality of blur corrections.

(9) In the above-described embodiment, the example in which the shake detection unit 325 is provided has been described. However, a plurality of shake detection units may be provided. 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.

Each embodiment and modification may be combined arbitrarily. Moreover, it is not limited by each embodiment described above.

DESCRIPTION OF SYMBOLS 1 Camera system 2 Camera body 3 Lens barrel 201 Body outer shell 202 Body inner shell 210 Body outer shell mount 211 Contact 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 driver 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 Tab 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 driving portion 313 Yaw direction rotation detecting portion 314 Control unit 315 operation member 316 lens outer shell coupling unit 317 lens inner shell coupling unit 320 housing 322 pitch drive unit 323 pitch direction rotation detection unit 325 first blur detection unit 326 lens inner shell mount 326b recess

326c coil spring

326d engagement Pin

326f Mount body 330 Shift direction anti-vibration 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

A lens barrel in which the camera body can be attached and detached,
A first tube having a first engagement portion that engages with a first portion of the camera body;
A second cylinder disposed inside the first cylinder and having a second engaging portion and an optical system that engage with a second portion of the camera body;
A lens barrel comprising: an engagement state between the first engagement portion and the first portion; and a holding mechanism that maintains an engagement state between the second engagement portion and the second portion.
The lens barrel according to claim 1, further comprising a drive unit that drives the second cylinder with respect to the first cylinder.
The holding mechanism includes a first holding mechanism that holds an engagement state between the first engagement portion and the first portion, and a first holding mechanism that holds an engagement state between the second engagement portion and the second portion. The lens barrel according to claim 1, wherein the lens barrel has two holding mechanisms.
4. The lens barrel according to claim 3, further comprising an operation unit that releases the holding of the engaged state between the first engaging portion and the first portion by the first holding mechanism.
The operation unit releases the hold of the engagement state between the second engagement part and the second part in conjunction with the release of the hold state of the engagement between the first engagement part and the first part. The lens barrel according to claim 4.
A detection unit for detecting the movement of the first cylinder or the movement of the second cylinder;
The lens barrel according to claim 2, wherein the driving unit performs driving based on movement of the first cylinder or movement of the second cylinder.
A camera body with a detachable 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 has a second engaging portion that engages with the second tube of the lens barrel and an optical system;
A camera body comprising: an engagement state between the first engagement portion and the first tube; and a holding mechanism that holds an engagement state between the second engagement portion and the second tube.
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 cylinder engaged with the first housing;
A second cylinder having an optical system and engaging with the second housing;
The camera body or the lens barrel includes a holding mechanism that holds an engagement state between the first housing and the first tube and an engagement state between the second housing and the second tube. Camera system.