JP6786663B2 - Camera accessories and cameras - Google Patents

Description

The present invention relates to a camera and camera accessories such as interchangeable lenses that are interchangeably attached to the camera.

A camera accessory (hereinafter, simply referred to as an accessory) receives power from the camera and communicates commands, data, and the like with the camera while it is attached to the camera. In order to enable such power supply and communication, the camera and the mounting portion (mount) of the accessory are provided with a plurality of contacts that are electrically connected by contacting each other. Further, for mounting (coupling) the camera and the accessory, a bayonet connecting method is often adopted in which the mounts are relatively rotated to engage the bayonet claws provided on the respective mounts.

Patent Document 1 discloses a camera and an interchangeable lens each having a mount mounted by a bayonet coupling method. When the coupling between the camera and the interchangeable lens mount is completed after the relative rotation, the plurality of camera-side contact pins provided on the camera-side mount and the plurality of lens-side contact pins (contact surfaces) provided on the lens-side mount are connected to each other. Contact. The camera-side contact pin and the lens-side contact pin are each held by contact seats provided on the mount. A hole for holding the camera-side contact pin is formed in the contact seat on the camera side, and between the camera-side contact pin inserted in the hole and the bottom surface (printed wiring board) of the hole. , A spring is arranged to urge the camera-side contact pin in a direction protruding from the hole. On the other hand, the contact pin on the lens side is fixed to the contact seat on the lens side.

Recently, for the purpose of reducing the weight of the camera, the mount is manufactured by molding with resin. The mount molded in this way is hereinafter referred to as a mold mount. Further, for the purpose of reducing the thickness of the camera, a contact spring for urging the electric contact pin on the camera side in the protruding direction may be formed of a leaf spring.

Further, the contact pins on the camera side and the contact pin on the lens side exchange power supply contact pins for supplying power from the camera to the accessory for driving the actuator in the accessory, and signals for controlling the accessory. Includes control contact pins for.

Japanese Unexamined Patent Publication No. 62-195633

Cameras and accessories provided with contact pins on the mount (particularly the mold mount) as described above have the following problems.

FIG. 19 shows a state when the camera 401 equipped with the interchangeable lens 402 as an accessory is dropped on the ground 405. When the camera 401 is dropped, there is a high possibility that the tip of the heavier interchangeable lens 402 first collides with the ground 405. In this case, the maximum external force that tries to peel off the mount is generated at the lowermost part of the mount that connects the camera 401 and the interchangeable lens 402. For this reason, the engagement portion of the bayonet claw is arranged in the phase including the lowermost part of the camera side and the lens side mount, and the attachment portion by the fastening screw for attaching the camera side and the lens side mount to the camera body and the interchangeable lens body, respectively. It is desirable to place.

However, if a camera-side contact pin is provided at the same position as the fastening screw in the circumferential direction of the mount and a leaf spring is used as the contact spring that urges this in the protruding direction, the leaf spring must be arranged so as to avoid the fastening screw. Therefore, it becomes necessary to widen the pitch between the contact pins. As a result, the occupied angle range of the contact pin in the mount is increased, which hinders the miniaturization of the camera.

On the other hand, the camera is equipped with a motor as an actuator for driving a shutter or the like, and the noise generated by the motor may affect the control of the accessory on the lens side and cause the accessory to malfunction. is there.

Further, wiring is performed from the power supply circuit provided in the camera to the contact pin for power supply by a flexible substrate or the like, but if the length of this wiring is long, the loss due to the wiring resistance may increase.

The present invention provides a camera and a camera accessory that have a small contact angle range in the mount and can be miniaturized. The present invention also provides a camera and a camera accessory that have less loss due to wiring resistance in power supply and are resistant to noise.

The image pickup device as one aspect of the present invention is an image pickup device provided with a first mount portion to which an accessory can be attached, and is an electric power supply circuit, an actuator, and a plurality of contact surfaces provided on the accessory. A state in which a plurality of contact pins used for a specific connection are provided, and the plurality of contact pins are arranged along the shape of the first mount portion, and the accessory is attached to the image pickup apparatus. A first contact pin and a second contact pin used to supply power to the accessory, and a third contact pin used to indicate the type of the attached accessory. When the image pickup device is viewed from the side facing the mount portion, the first contact pin and the second contact pin are arranged closer to the power supply circuit than the third contact pin, away from the actuator. The third contact pin is closer to the actuator and away from the power supply circuit than the first contact pin and the second contact pin .

Further, the accessory as another aspect of the present invention is an accessory provided with a first mount portion that can be attached to and detached from an imaging device including a power supply circuit and an actuator, and a plurality of accessories provided in the imaging device. It has a plurality of contact surfaces used for electrical connection with the contact pins of the above, and the plurality of contact surfaces are arranged along the shape of the first mount portion, and the accessory is used for imaging. It is used to indicate the first contact surface and the second contact surface used for supplying power from the image pickup device to the accessory in the state of being mounted on the device, and the type of the accessory mounted on the image pickup device. When the accessory is viewed from the side facing the first mount portion, including the third contact surface, and the actuator is mounted on the imaging device, the first contact surface and the first The second contact surface is located closer to the power supply circuit than the third contact surface, and the third contact surface is closer to the first contact surface and the second contact surface. It is characterized in that it is located close to the actuator and away from the power supply circuit .

In the present invention, it is disposed contacts (contact pins or contact surfaces) used in the power supply of the imaging device and accessories on the side of the power supply circuit of the imaging apparatus. Accordingly, it is a loss due to the wiring resistance in the power supply is small, and to realize a strong imaging device and accessory to the noise.

FIG. 3 is a block diagram showing an electrical configuration of an interchangeable lens according to a first embodiment of the present invention and a camera to which the interchangeable lens is mounted. The figure which shows the structure of the mount and the connector provided in the interchangeable lens of Example 1 and the said camera. Enlarged view of the above connector. Sectional view of the above connector. The figure which shows the state of contact of the said connector in the process of connecting a mount provided with the interchangeable lens of Example 1 and the said camera. Enlarged views of (4) to (8) in FIG. The figure which shows the contact pattern on a lens side in Example 1. FIG. The figure which shows the contact pin on the camera side in the state of completion of coupling in Example 1. FIG. The figure which shows the contact pin on the camera side in the intermediate rotation state of the mount in Example 1. FIG. The figure which shows the contact pin on the camera side in the modification of Example 1. FIG. The figure which shows the lens side contact pattern and the camera side contact pin in Example 2 of this invention. The figure which shows the contact pin on the camera side in another modification of Example 1. FIG. The block diagram which shows the connection between the lens type determination part of the 1st and 2nd interchangeable lenses in Example 1 and a camera microcomputer. The block diagram which shows the structure of the voltage conversion part in Example 1. FIG. A timing chart showing an example of input / output timing of the camera microcomputer in the first embodiment. The front view which shows the structure of the camera which is the camera of the implementation row 1 and uses the mold mount. The rear view which shows the structure of the camera shown in FIG. An exploded perspective view of the mount in the camera shown in FIG. The figure which shows how an external force acts when a camera falls.

Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1A shows a camera system composed of an interchangeable lens 100 as a camera accessory according to a first embodiment of the present invention and a camera 10 to which the interchangeable lens 100 is detachably attached. Each of the camera 10 and the interchangeable lens 100 has a mount 1 provided with electrical contacts for supplying power to the interchangeable lens 100 from the camera 10 and communicating with each other. In this embodiment, an interchangeable lens will be described as a camera accessory that can be attached to the camera, but a camera accessory other than the interchangeable lens is also included as another embodiment of the present invention.

The camera 10 has an image sensor (imaging element) 11 that photoelectrically converts a subject image as an optical image formed by the photographing lens 101 in the interchangeable lens 100 and outputs an electric signal. Further, the camera 10 includes an A / D conversion unit 12 that converts an analog electric signal output from the image sensor 11 into a digital signal, and an image processing unit 13 that performs various image processing on the digital signal to generate a video signal. Has. The video signal (still image or moving image) generated by the image processing unit 13 is displayed on the display unit 14 or recorded on the recording medium 15.

Further, the camera 10 functions as a buffer when processing a video signal, and also has a memory 16 for storing an operation program used by the camera control unit 18, which will be described later. Further, the camera 10 has an operation input unit 17 including a power switch for turning on / off the power, a shooting switch for starting recording of a video signal, a selection / setting switch for setting various menus, and the like. The camera control unit 18 includes a microcomputer, controls the image processing unit 13 in response to a signal from the operation input unit 17, and controls communication with the interchangeable lens 100.

On the other hand, the interchangeable lens 100 has a lens driving unit 102 that drives an actuator that moves or operates a focus lens (not shown), a zoom lens, an aperture, and an anti-vibration lens included in the photographing lens 101. Further, the interchangeable lens 100 includes a lens control unit 103 including a microcomputer that controls the lens drive unit 102 in response to a control signal received from the camera control unit 18 by communication.

FIG. 1B shows a terminal provided on the mount 1 for electrically connecting the camera 10 (camera control unit 18) and the interchangeable lens 100 (lens control unit 103).

The LCLK terminal (1-1) is a terminal for a communication clock signal output from the camera 10 to the interchangeable lens 100. The DCL terminal (1-2) is a terminal for communication data output from the camera 10 to the interchangeable lens 100. The DLC terminals (1-3) are terminals for communication data output from the interchangeable lens 100 to the camera 10.

The MIF terminals (1-4) are terminals for detecting that the interchangeable lens 100 is attached to the camera 10. The microcomputer (hereinafter referred to as a camera microcomputer) 20 in the camera control unit 18 detects that the interchangeable lens 100 is attached to the camera 10 based on the voltage of the MIF terminal.

The DTEF terminal (1-5) is a terminal for detecting the type of the interchangeable lens 100 mounted on the camera 10. The camera microcomputer 20 detects the type of the interchangeable lens 100 mounted on the camera 10 based on the voltage of the DTEF terminal.

The VBAT terminal (1-6) is a terminal for supplying a drive power supply (VM) used for various operations other than communication control from the camera 10 to the interchangeable lens 100. The VDD terminal (1-7) is a terminal that supplies a communication control power supply (VDD) used for communication control from the camera 10 to the interchangeable lens 100. The DGND terminal (1-8) is a terminal for connecting the communication control system of the camera 10 and the interchangeable lens 100 to the ground. The PGND terminal (1-9) is a terminal for connecting the camera 10 and the mechanical drive system including the motor and the like provided on the interchangeable lens 100 to the ground.

Hereinafter, the case where the type of the interchangeable lens 100 that the camera 10 identifies based on the voltage of the DTEF terminal includes a first interchangeable lens and a second interchangeable lens having a communication voltage different from that of the first interchangeable lens. explain. The communication voltage will be described later.

The camera power supply unit 21 provided in the camera control unit 18 converts the battery voltage supplied from a battery (not shown) mounted on the camera 10 into a voltage required for the operation of each circuit. At this time, the power supply unit 21 generates voltages V1, V2, V3, VM.

The voltage V1 is a voltage as a communication control power source (VDD) of the first and second interchangeable lenses, and is a communication voltage of the first interchangeable lens. The voltage V2 is the communication voltage of the second interchangeable lens. V3 is a voltage as an operating power source for the camera microcomputer 20. The VM is a voltage as a driving power source for the first and second interchangeable lenses as described above. Although V1 and V2 have different voltages, V1 and V3 or VM may have the same voltage, or V2 and V3 or VM may have the same voltage.

When the power switch 22 is turned on, the camera microcomputer 20 starts supplying VDD and VM from the camera 10 to the interchangeable lens 100. When the power switch 22 is turned off, the camera microcomputer 20 stops the supply of VDD and VM from the camera 10 to the interchangeable lens 100.

The camera microcomputer 20 communicates with the interchangeable lens 100 via the voltage conversion unit 23. The camera microcomputer 20 has an LCLK_OUT terminal that outputs a communication clock signal, a DCL_OUT terminal that outputs communication data to the interchangeable lens 100, and a DLC_IN terminal that receives input of communication data from the interchangeable lens 100. Further, the camera microcomputer 20 has a MIF_IN terminal for detecting the attachment of the interchangeable lens 100, a DTEF_IN terminal for identifying the type of the interchangeable lens 100, and a CNT_V_OUT terminal for outputting a communication voltage switching signal to the voltage conversion unit 23. And have. Further, the camera microcomputer 20 has a CNT_ VDD_OUT terminal for outputting an energization signal of the power switch 22, a connection terminal for the image processing unit 13, and a connection terminal for the operation input unit 17. The operation of the voltage conversion unit 23 will be described later.

The lens power supply unit 214 converts VDD (V4) supplied from the camera 10 to the interchangeable lens 100 to a voltage V5. The microcomputer (hereinafter referred to as a lens microcomputer) 211 in the lens control unit 103 communicates with the camera microcomputer 20 via the voltage conversion unit 23 described above. The lens microcomputer 211 has an LCLK_IN terminal that receives an input of a communication clock signal, a DLC_OUT terminal that outputs communication data to the camera 10, a DCL_IN terminal that receives an input of communication data from the camera 10, and a lens drive unit 102. It has a connection terminal.

The attachment detection of the interchangeable lens 100 to the camera 10 will be described. Since the MIF_IN terminal of the camera microcomputer 20 is pulled up to the power supply by the resistor R2 (100 KΩ), it becomes H (High) when the lens is not attached. However, since the MIF_IN terminal is connected to the GND in the interchangeable lens 100 when the interchangeable lens (first and second interchangeable lenses) 100 is attached, the interchangeable lens 100 is attached regardless of the type of the interchangeable lens 100. At that point, it becomes L (Low).

A configuration example of the lens type determination unit 213 will be described with reference to FIG. The lens type determination unit 213 is composed of a resistor RL provided between the DTEF terminal provided on the mount 1 and the GND. The resistance value of the resistance RL is set in advance according to the type of the interchangeable lens. For example, the resistance RL provided on the first interchangeable lens shown in FIG. 13A is 0Ω, and the resistance RL provided on the second interchangeable lens shown in FIG. 13B is 300KΩ.

In the camera 10, a resistor R1 (for example, 100 KΩ) is connected between the DTEF terminal of the mount 1 and the voltage (V3) of the operating power supply of the camera microcomputer 20, and the DTEF terminal is further connected to the DTEF_IN terminal of the camera microcomputer 20. Will be done. The DTEF_IN terminal of the camera microcomputer 20 has an AD conversion function (here, a 10-bit AD conversion function).

The operation of determining the type of the interchangeable lens by the camera microcomputer 20 will be described. The camera microcomputer 20 determines the type of the attached interchangeable lens according to the voltage value input to the DTEF_IN terminal. Specifically, the camera microcomputer 20 AD-converts the input voltage value, and determines the lens type by comparing the AD-converted value with the lens type determination standard that the camera microcomputer 20 has in advance.

For example, when the first interchangeable lens is attached, the AD conversion value of the voltage input to the DTEF_IN terminal is the resistivity ratio RL / (R1 + RL) between 100 KΩ of R1 and 0 Ω of RL, which is approximately "0x0000". It is decided. Therefore, the camera microcomputer 20 detects that the AD conversion value of the DTEF_IN terminal is within the range of "0x0000 to 0x007F", which is the first lens type determination standard, and the mounted interchangeable lens is the first interchangeable lens. Determined to be a lens. On the other hand, when the second interchangeable lens is attached, the AD conversion value of the voltage input to the DTEF_IN terminal is the resistance ratio RL / (R1 + RL) between 100 KΩ of R1 and 300 KΩ of RL, and is determined to be approximately "0x02FF". .. Therefore, the camera microcomputer 20 detects that the AD conversion value of the DTEF_IN terminal is within the range of "0x0280 to 0x037F" which is the second lens type determination standard, and the attached interchangeable lens is replaced with the second lens. Determined to be a lens.

In the above description, the resistance value of the resistor RL in the first interchangeable lens is set to 0Ω, but a form in which the resistor RL is directly connected to the GND may be adopted without using the resistor of 0Ω.

A configuration example of the voltage conversion unit 23 is shown in FIG. The voltage selector 51 has a function of outputting one of the two voltages input to the VIN1 terminal and the VIN2 terminal to the OUT terminal according to the logic of the SEL terminal. Specifically, when the SEL terminal is L, the voltage of the VIN1 terminal is output, and when the SEL terminal is H, the voltage of the VIN2 terminal is output. V1 is connected to the VIN1 terminal, V2 is connected to the VIN2 terminal, and the CNT_V_OUT terminal of the camera microcomputer 20 is connected to the SEL terminal. The output of the OUT terminal, hereinafter referred to as _{V S.}

The level shifters 52, 53, and 54 have a function of converting the signal input to the SIN terminal from the voltage of the VIN terminal to the voltage of the VOUT terminal and outputting it from the SOUT terminal.

The LCLK_OUT terminal of the camera microcomputer 20 is connected to the SIN terminal of the level shifter 52, and the SOUT terminal is connected to the LCLK terminal of the mount 1. Furthermore, the VIN terminal is connected the same V3 and operating power supply voltage of the camera microcomputer 20, the VOUT pin V _S output from the voltage selector 51 is connected. The DCL_OUT terminal of the camera microcomputer 20 is connected to the SIN terminal of the level shifter 53, the SOUT terminal is connected to the DCL terminal of the mount 1, and the VIN terminal is connected to V3, which is the same as the operating power supply voltage of the camera microcomputer 20. The VOUT terminal, the _{V S} that is output from the voltage selector 51 is connected. The SIN terminal of the level shifter 54 DLC terminal mount 1 is connected, DLC_IN terminal of the camera microcomputer is connected to the SOUT terminal, the VIN pin _{V S} output from the voltage selector 51 is connected. Further, V3, which is the same as the operating power supply voltage of the camera microcomputer 20, is connected to the VOUT terminal. Thus, the _{V S} that is output from the voltage selector 51 (that is, V1 or V2), the communication voltage between exchange and the camera 10 lens 100.

The voltage switching operation in the voltage conversion unit 23 will be described. The camera microcomputer 20 controls the CNT_V_OUT terminal according to the logical table shown in Table 1.

As described above, the camera microcomputer 20 determines the type of the mounted interchangeable lens 100 based on the voltage value (AD conversion value) input to the DTEF_IN terminal. Then, the logic output from the CNT_V_OUT terminal is controlled according to the determination result of the type of the interchangeable lens. Specifically, when the camera microcomputer 20 determines from the voltage value of the DTEF_IN terminal that the mounted interchangeable lens 100 is the first interchangeable lens, the camera microcomputer 20 outputs H from the CNT_V_OUT terminal for communication. The voltage is controlled to V1. Further, when the camera microcomputer 20 determines from the voltage value of the DTEF_IN terminal that the attached interchangeable lens 100 is the second interchangeable lens, the camera microcomputer 20 outputs L from the CNT_V_OUT terminal and sets the communication voltage to V2. To control.

When a voltage value in the range outside the above-mentioned first and second lens type determination criteria is detected as the voltage value (AD conversion value) of the DTEF_IN terminal, the camera microcomputer 20 uses an interchangeable lens that the camera 10 does not support. It is determined that a certain "non-compatible lens" is attached. Alternatively, the determination is reserved because the lens type determination cannot be performed normally. In these cases, the camera microcomputer 20 does not communicate with the interchangeable lens 100.

FIG. 15 shows an example of input / output timing of the MIF_IN terminal, DTEF_IN terminal, CNT_V_OUT terminal, CNT_ VDD_OUT terminal of the camera microcomputer 20, and the LCLK terminal of the mount 1. FIG. 15A shows the case where the first interchangeable lens is attached, and FIG. 15B shows the case where the second interchangeable lens is attached. t0 indicates the time when the voltage is input to the DTEF_IN terminal while the lens is attached, and t1 indicates the time when the voltage is input to the MIF_IN terminal while the lens is attached. Further, t2 indicates when the camera is started (power is turned on), t3 indicates when the lens type is determined and the communication voltage is set, and t4 indicates when the mounted interchangeable lens 100 is energized and communication is started. Note that t0 and t1 may be simultaneous. Here, the voltage input timings to the DTEF_IN terminal and the MIF_IN terminal are t0 and t1 described above, but the reading timing in the camera microcomputer 20 is the order in which the voltage value of the DTEF_IN terminal is read after the MIF_IN terminal becomes L. It has become.

Regardless of whether the first or second interchangeable lens is attached, the voltage is input to the MIF_IN terminal after (or at the same time as) the voltage input to the DTEF_IN terminal (t0, t1). Then, when the camera is started (t2), the lens type is determined and the communication voltage is set according to the determination result (t3), and then energization and communication with the interchangeable lens 100 are started (t4). The interchangeable lens may be attached to the camera after the camera is started. In this case as well, the order of t0, t1 and t2 is reversed, but after the voltage is input to the DTEF_IN terminal (or at the same time). ) Is input to the MIF_IN terminal.

When performing such an operation (or control) when the lens is attached, the DTEF terminal on the mount 1 regardless of whether the interchangeable lens 100 is the first or second interchangeable lens or the timing of starting the camera. Must be connected earlier (or at the same time) than the MIF terminal. This is due to the following reasons. As described above, the camera microcomputer 20 reads the voltage value of the DTEF_IN terminal when the MIF_IN terminal becomes L. Here, if the DTEF terminal is not connected even though the MIF_IN terminal is L, the non-compatible lens is determined as described above, and the camera microcomputer 20 does not communicate with the interchangeable lens 100. Therefore, in order to discriminate the type of the interchangeable lens 100 and communicate with the interchangeable lens 100 at an appropriate communication voltage, it is necessary to securely connect the DTEF terminal when the MIF_IN terminal becomes L.

Next, the configuration of the camera-side connector including the camera-side contact pin constituting the camera-side terminal on the mount 1 and the lens-side including the lens-side contact pattern (accessory-side contact surface) constituting the lens-side terminal on the mount 1. The configuration of the connector will be described.

FIG. 2A shows the camera side mount 201 as viewed from the front (subject side) in the optical axis direction, and FIG. 3A shows the camera side connector (camera side contact seat) provided on the camera side mount 201. 202 and the contact pins 202a _{1 to} 202a ₉ ) on the camera side are shown enlarged. FIG. 2B shows the lens-side mount 301 as seen from the rear (image plane side) in the optical axis direction, and FIG. 3B shows the lens-side connector (lens-side contact) provided on the lens-side mount 301. The seat 302 and the lens-side contact patterns 302a _{1 to} 302a ₉ ) are shown in an enlarged manner. Further, FIG. 4 shows a cross section of the camera side connector and the lens side connector in the combined state.

The camera-side mount 201 is fixed to the front end of a camera body (chassis) (not shown). The camera-side mount 201 has a ring-shaped mount reference surface 201b at the front end on the outer peripheral side thereof to secure a predetermined flange back. The camera-side bayonet claws 201a are provided at three locations in the circumferential direction (hereinafter referred to as the mount circumferential direction) inside the mount reference surface 201b. Further, the camera side mount 201 is provided with a lock pin 205 for positioning in the relative rotation direction with respect to the lens side mount 301 so as to be able to project and retract with respect to the mount reference surface 201b.

The lens-side mount (accessory-side mount) 301 is fixed to the rear end of an interchangeable lens (not shown). The lens-side mount 301 has a mount reference surface 301b, which is a reference surface in the optical axis direction, at the rear end on the outer peripheral side thereof, and lenses are provided at three locations in the circumferential direction (mount peripheral direction) inside the mount reference surface 301b. It has a side bayonet claw (accessory side bayonet claw) 301a. Further, the lens-side mount 301 is formed so that the lock hole portion 301c into which the lock pin 205 of the camera-side mount 201 is inserted opens at the mount reference surface 301b. The lock hole portion 301c has an inner diameter that engages with the lock pin 205 with almost no play in the mount circumferential direction (relative rotation direction), and the lock pin in the radial direction of the lens side mount 301 (hereinafter referred to as the mount radial direction). It is an elongated hole having an inner diameter that is somewhat larger than the outer diameter of 205. This is to enable smooth insertion of the lock pin 205 into the lock hole portion 301c when the lens is attached (relative rotation).

In a part of the area inside the bayonet claw 201a in the camera side mount 201, eight camera side contact pins 202a ₁ , 202a ₂ , ..., 202a ₉ arranged in the circumferential direction of the mount are held. The camera-side contact holding portion) 202 is formed. As shown in FIG. 4, the camera-side contact pins 202a _{1 to} 202a ₉ can each project forward or retract rearward into the pin holding holes formed in the camera-side contact seat 202 (protruding retracting direction). Can be moved to). A flexible printed wiring board 206 is arranged on the bottom surface of each pin holding hole. Then, between the flexible printed wiring board 206 and the flange portion of each camera-side contact pin, contact springs (202b ₁ , 202b ₂₎ that urge the camera-side contact pin in the direction of projecting forward from the camera-side contact seat 202. , ..., 202b ₉ ) are arranged.

The contact pins 202a _{1 to} 202a ₉ on the camera side are the DTEF terminal, DGND terminal, LCLK terminal, DLC terminal, DCL terminal, PGND terminal, VBAT terminal, VDD terminal and MIF terminal described in FIG. It is connected to the.

More cameras side contact base 202, the camera-side contact pin 202a _n (a n = 1 to 9, the following is the same in the description), the camera-side connector is constituted by the contact spring 202b _n and the flexible printed circuit board 206 ..

Eight rectangular lens-side contact patterns 302a ₁ , 302a ₂ , ..., 302a ₉ arranged in the circumferential direction of the mount are held in a part of the area inside the bayonet claw 301a in the lens-side mount 301. (Accessory side contact holding portion) 302 is formed. The shape of the contact pattern on the lens side may be a shape other than a rectangle, for example, a circle.

The lens-side contact patterns 302a _{1 to} 302a ₉ are connected to the L_CPU 151 shown in FIG. 1 via the flexible printed wiring board 306. The portion of the lens-side contact seat 302 adjacent to the portion that holds the lens-side contact patterns 302a ₁ , 302a ₂ , ..., 302a ₉ (hereinafter referred to as the pattern holding portion) is a recess recessed forward of the pattern holding portion. 302z is formed. Further, a slope 302w is formed between the pattern holding portion and the recess 302z. In the following description, that portion of the lens-side contact pattern 302a ₁ ~302a ₉ lens side contact base 302 together to hold the lens-side contact pattern 302a ₁ ~302a ₉ of the lens-side contact base 302.

The lens-side contact patterns 302a _{1 to} 302a ₉ are in this order, and the camera-side contact pins 202a connected to the DTEF terminal, DGND terminal, LCLK terminal, DLC terminal, DCL terminal, PGND terminal, VBAT terminal, VDD terminal, and MIF terminal. Corresponds to _{1 to} 202a ₉ .

Or more lens-side contact base 302 (including recess 302z and slope 302W), (a n = 1 to 9, in the following description are the same) lens side contact pattern 302a _n and the lens-side connector by a flexible printed circuit board 306 Is formed.

Camera contact pins 202a _n and the lens-side contact pattern 302a _n are disposed in pairs and a position (contact position) each other in the binding completion state of the camera and the interchangeable lens. Lens when mounted on (including lens side contact pattern 302a _n as described above) the lens-side contact base 302 that contacts the camera-side contact pin 202a _n, the camera-side contact pin 202a _n is charged with contact springs 202b _n While being pushed against the camera side contact seat 202. Thus, the camera-side contact pin 202a _n is pressed against the lens-side contact pattern 302a _n to form a pair therewith, the electrical connection between the camera and the interchangeable lens is performed.

FIGS. 5 (1) to 5 (8) show a process in which the lens-side connector is connected to the camera-side connector when the lens is attached. The right side of FIG. 5 also shows the relationship between the above-mentioned lock pin 205 and the lock hole portion 301c in the states shown in (1) to (8).

FIG. 5 (1) shows a state in which the lens-side mount 301 is brought closer to the camera-side mount 201 in the optical axis direction before each lens-side bayonet claw 301a is inserted between the two camera-side bayonet claws 201a. Is shown. Hereinafter, the state shown in FIG. 5 (1) is referred to as a state before mount contact. In FIG. 5 (2), the lens-side bayonet claw 301a is inserted between the camera-side bayonet claws 201a, and the lens-side mount 301 (mount reference surface 301b) is aligned with the camera-side mount 201 (mount reference surface 201b) in the optical axis direction. Shows the state of contact with. Hereinafter, the state shown in (2) is referred to as a mount contact state (first state).

(3) to (7) of FIG. 5 show a state (relative) in which the lens side mount 301 is being rotated from the mount contact state toward the camera side mount 201 toward the coupling complete state (second state). Rotating: Hereinafter referred to as intermediate rotation state) is shown step by step. FIG. 5 (8) shows a state in which the lens-side mount 301 is rotated with respect to the camera-side mount 201 until the coupling is completed.

In the mount contact state of (2), the pattern holding portion (lens contact pattern 302a ₉ or a portion in the vicinity thereof) of the lens side contact seat 302 comes into contact with the melody side contact pin 202a ₁ . As a result, the camera-side contact pin 202a ₁ is pushed against the camera-side contact seat 202 as compared with the state before the mount contact in (1).

Hereinafter, among a plurality of (n) camera-side contact pins 202a _n , the camera-side contact pin 202a ₁ for the DTEF terminal that abuts on the lens-side contact seat 302 in the mount contact state is also referred to as a first camera-side contact pin. .. Further, the camera-side contact pins 202a _{2 to} 202a ₉ other than the first camera-side contact pin, that is, the camera-side contact pins 202a _{2 to} 202a ₉ that do not abut on the lens-side contact seat 302 in the mount contact state are also referred to as the second camera-side contact pins. Of these, the camera-side contact pin 202a ₉ for the MIF terminal is a specific second camera-side contact pin.

In the mount contact state, the lock pin 205 is pushed by the mount reference surface 301b of the lens side mount 301 at a position away from the lock hole portion 301c. Therefore, the subsequent rotation of the lens-side mount 301 with respect to the camera-side mount 201 is allowed.

The engagement between the bayonet claw 301a on the lens side and the bayonet claw 201a on the camera side is engaged from the mount contact state of (2) to the coupling complete state of (8) through the intermediate rotation states of (3) to (7). Complete. During this time, the lens-side contact seat 302 slides against the camera-side contact pins 202a _{1 to} 202a ₉ , and the second camera-side contact pins 202a _{2 to} 202a ₉ are also pushed against the camera-side contact seat 202. Thus, in binding completion state of the finally (8), and a camera-side contact pin 202a _n and the lens-side contact pattern 302a _n paired with each other contact (pressure contact).

Further, in the combined state, the lock pin 205 and the lock hole portion 301c are aligned in the mounting circumferential direction, so that the lock pin 205 protruding from the mount reference surface 201b of the camera side mount 201 is the lens side mount 301. It is inserted into the lock hole 301c. As a result, the coupling completed state is maintained until the lock pin 205 is pulled out from the lock hole portion 301c by the unlocking mechanism (not shown).

Here, with reference to FIG. 6, (4) in FIG. 5 - (7) and the camera-side contact pin 202a _n and the lens-side contact pattern 302a _n in the intermediate rotating state to describe the flow going in contact as shown in.

In this embodiment, the contact position of the camera-side contact pin on the lens-side contact pattern in the fully coupled state is referred to as a pin contact position. The pitch of the lens-side contact patterns corresponds to the distance between the pin contact positions on the adjacent contact patterns.

Further, the lens-side contact pattern 302a _n in the figure in the pin contact positions with the lens-side contact pattern _{a n} on the left end (i.e., the lens-side contact pattern 302a _n is in the direction of movement of the camera-side contact pin 202a _n the distance between the _tip), and _{La n (La 1 ~La 9)} . At this time, La _{1 to} La ₉ are
La ₁ > La _2, La ₃ , La ₄ , La ₅ , La ₆ , La ₈ > La ₉ > La ₇
It is set to have the following relationship.

This relationship can be rephrased as follows, focusing on the lens-side contact patterns 302a ₁ , 302a ₉ and the camera-side contact pins 202a ₁ , 202a ₉ , for example. The position of the portion of the lens-side contact pattern 302a ₁ that starts contact with the camera-side contact pin 202a ₁ in the intermediate rotation state and the contact with the camera-side contact pin 202a _{9 in the} lens-side contact pattern 302a _{9 in} the intermediate rotation state. the distance of the mount circumferential direction between the position of the part to start the L _a. The “part where contact starts” means, for example, the side of the rectangle when the contact pattern is rectangular, and the top of the arc when the contact pattern is circular. The distance in the circumferential direction of the mount can also be called an angle. The distance (angle) of the mount circumferential direction between the camera-side contact pin 202a _1, 202a ₉ (center axis) and _{L B.} The distance _{L A} is a distance _{L B} is smaller than (in other words, the distance _{L B} is greater than the distance _{L A).}

When the lens side mount 301 is rotated from the state shown in FIG. 5 (3), first, as shown in FIG. 6 (A), the camera side contact pin (DTEF terminal pin) 202a ₁ and the lens side contact pattern (DTEF) Terminal pattern) 302a ₁ starts contact. In this _case, (in other words, _{L A} and _{L B)} La 1 _{~La 9} for having the above relationship, the other camera-side contact pin 202a ₂ ~202a ₉ and the lens-side contact pattern 302a ₂ ~302a ₉ is in contact Not.

When the lens-side mount 301 is further rotated from the state of FIG. 6 (A), as shown in FIG. 6 (B) (FIG. 5 (5)), the camera-side contact pins 202a _{2 to} 202a ₆ and 202a ₈ are formed. The lens-side contact patterns 302a _{2 to} 302a ₆ and 302a ₈ start contacting at the same time. At this time, the camera-side contact pins 202a _7, 202a ₉ and the lens-side contact patterns 302a _7, 302a ₉ are not in contact with each other.

When the lens-side mount 301 is further rotated from the state of FIG. 6 (B), as shown in FIG. 6 (C) (FIG. 5 (6)), the camera-side contact pin (MIF terminal pin) 202a ₉ and The contact pattern on the lens side (pattern for MIF terminal) 302a ₉ starts contact. At this time,
La ₉ > La ₇
Therefore, the camera-side contact pin 202a ₇ and the lens-side contact pattern 302a ₇ do not come into contact with each other.

When the lens-side mount 301 is further rotated from the state of FIG. 6 (C), as shown in FIG. 6 (D) (FIG. 5 (7)), the camera-side contact pin (VBAT terminal pin) 202a ₇ and The contact pattern on the lens side (pattern for VBAT terminal) 302a ₇ starts contact.

Then, when the lens side mount 301 is further rotated from the state of FIG. 6 (D), the coupling is completed as shown in FIG. 6 (E) (FIG. 5 (8)).

As described above, the order in which the camera-side contact pin and the lens-side contact pattern is contacted in this embodiment becomes a distance La _n descending order, the lens side corresponding to the camera-side contact pin 202a ₁ constituting the DTEF terminal The contact pattern 302a ₁ first starts contact.

The distance the L _A and the distance L _B may be the same. In this case, to match the timing of contact pins and DTEF terminal pattern DTEF terminal timing pin and MIF terminal pattern MIF terminal contacts, match the distance _{L B} to expand the distance _{L A.} At this time, the width of the lens-side contact pattern 302a _{1 in} the circumferential direction may be expanded with respect to the portion opposite to the portion that starts contact with the camera-side contact pin (to the right in FIG. 6). L _A and _L if _B and are the same, the lens-side mount 301 from the state of (3) in FIG. 5 is rotated, the corresponding camera-side contact pin 202a _1, 202a ₉ for DTEF terminals and MIF terminal The contact patterns 302a ₁ and 202a ₉ on the lens side start contact with each other at the same time.

Next, a problem relating to the first camera-side contact pin 202a ₁ and a solution thereof will be described. When the lens side mount 301 vigorously contacts the camera side mount 201 when the state before the mount contact state is reached, the lens side contact seat 302 with respect to the first camera side contact pin 202a ₁ . Collide strongly. The first camera-side contact pin 202a ₁ is movably inserted into the pin holding hole of the camera-side contact seat 202 (that is, has a fitting backlash that allows movement). Therefore, due to the impact of the collision, the first camera-side contact pin 202a ₁ is deformed by being tilted or bent depending on the amount of fitting backlash between the first camera-side contact pin 202a ₁ and the pin holding hole from the position where it extends almost straight in the optical axis direction. There is a risk of In this case, even if the coupling is completed, the first camera-side contact pin 202a ₁ and the lens-side contact pattern 302a ₁ paired with the _first camera-side contact pin 202a ₁ do not normally contact each other, resulting in a communication error between the camera and the interchangeable lens. , May cause a power short circuit.

In this embodiment, the lens-side contact pattern 302a _n Mounting circumferential width and mounting radial height, pitch and distance between the lens-side contact pattern 302a _n, the pitch and the camera between the camera-side contact pin 202a _n the diameter of the contact pin 202a _n, are set as follows.
<< About the width and height of the lens side contact pattern (accessory side contact surface) >>
The lens-side contact patterns 302a _{2 to} 302a ₉ paired with each of the second camera-side contact pins 202a _{2 to} 202a ₉ (hereinafter, also referred to as “corresponding to the pins”) are hereinafter referred to as the second lens-side contacts. It is called a pattern (second accessory side contact surface). The lens-side contact pattern 302a ₉ for the MIF terminal corresponds to a specific second accessory-side contact surface. The widths of these second lens-side contact patterns 302a _{2 to} 302a ₉ are set to L1 as shown in FIGS. 7 (A) and 8 (A). In FIG. 7 (A) and FIG. 8 (A), the second camera-side contact pin shown in 202a _x, showing a second camera side contact pins adjacent to each other 202a _x, at 202a _{x + 1.} Further, the second lens side contact pattern corresponding to the second camera-side contact pin 202a _x shown in 302a _x, illustrating the second lens side contact pattern adjacent 302a _x, at 302a _{x + 1.}

As shown in FIG. 8A, the width L1 is such that the second camera-side contact pin 202a _x, which extends substantially straight in the optical axis direction and is not deformed, contacts the second lens-side contact pattern 302a _x . It is set to be larger than the diameter V of the range W by a predetermined margin. Incidentally, the tip of the second camera-side contact pin 202a _x is worn by sliding is repeated with respect to the lens side contact pattern when the lens mounting / removal. Therefore, a range W in which the second camera-side contact pins 202a _x contacts are also set in consideration of this wear. V is the width of the portion in contact with the second lens side contact pattern 302a _x of the tip of the second camera-side contact pin 202a _x (diameter).

The height of the second lens side contact pattern 302a _x, as shown in FIG. 7 (A), is set to L3.

On the other hand, the lens-side contact pattern 302a ₁ paired with (corresponding to) the first camera-side contact pin 202a ₁ for the DTEF terminal is hereinafter referred to as the first lens-side contact pattern (first accessory-side contact surface). That is. The width of the _first lens-side contact pattern 302a ₁ is set to L2, which is larger than L1, as shown in FIGS. 7 (B) and 8 (B). In FIG. 7 (B) and 8 (B), the first camera-side contact pin shown in 202a _y, showing the first and second camera side contact pins adjacent to each other 202a _y, at 202a _{y + 1.} Further, the first lens side contact pattern corresponding to the first camera-side contact pin 202a _y indicated by 302a _y, showing the first and second lens-side contact patterns adjacent to each other 302a _y, at 302a _{y + 1.}

In FIG. 8 (B), or by tilting or deformation from its original state extending substantially straight in the optical axis direction, shows a first camera-side contact pins 202a _y that the tip is displaced. Width L2, as shown in the figure, referred to the range of the first camera-side contact pins 202a _y that the tip is displaced may contact with the first lens-side contact pattern 302a _y (hereinafter, also the contact expected range ) It is set larger than the diameter VV of the WW by a predetermined margin. Contact expected range WW is a range in which the tip of the first camera side contact pin which assumes the design corresponding to the amount that can be displaced, for example, the first camera-side contact pin 202a _y beyond the contact expected range WW If the tip is displaced, it is within the range where it is judged to be defective or abnormal.

Incidentally, the distal end of the first camera-side contact pin 202a _y also worn by sliding is repeated with respect to the lens side contact pattern in the lens mounting / upon removal. Therefore, the first camera-side contact pins 202a _y is also the first lens side contact pattern 302a _y may contact range (contact expected range) WW, are set in consideration of this wear. VV is the width of the portion in contact with the first lens-side contact pattern 302a _y of the distal end of the first camera-side contact pin 202a _y (diameter).

The height of the first lens side contact pattern 302a _y, as shown in FIG. 7 (B), are set to the same L3 and height of the second lens side contact pattern 302a _x. In this embodiment, the height L3 of each lens-side contact pattern is larger than the widths L1 and L2, but L3 may be the same as L1 or L2 or smaller than L1 or L2.

In FIGS. 7A and 7B, the pin contact position is shown as a schematic view so that the pin contact position is substantially at the center of the lens side contact pattern in the radial direction and the circumferential direction, but the pin contact position is in the radial direction and It does not have to be the center in the circumferential direction. In this embodiment, as shown in FIG. 6E, each pin contact position is deviated from the center in the radial direction of the lens-side contact pattern.

Thus, in this embodiment, the first the first width of the lens-side contact pattern 302a _y corresponding to the camera-side contact pin 202a _y, the second camera side contact pin is not the possibility that the inclination or deformation may occur is set larger than the width of the second lens side contact pattern 302a _x corresponding to 202a _x. Accordingly, even when the inclination or deformation occurs in the contact lens side contact seat 302 first camera-side contact pin 202a _x by (collision) (202a _1), these and the first lens side contact pattern 302a _x (302a Normal contact (electrical connection) with ₁ ) can be ensured. Therefore, it is possible to avoid a communication error between the camera and the interchangeable lens and the occurrence of a power short circuit.

In FIG. 3B, the widths L1 and L2 are shown as the angle ranges θ _L1 and θ _L2 on the lens-side contact seat 302 formed in an arc shape on the lens-side mount 301.
<< Pitch and spacing between lens-side contact patterns (between accessory-side contact surfaces) and pitch between camera-side contact pins >>
The pitch and spacing between the second lens-side contact patterns 302a _x , 302a _{x + 1} (302a _{2 to} 302a ₉ ) are set to P1 and Q1, respectively, as shown in FIGS. 7 (A) and 8 (A). There is. The pitch of the lens-side contact patterns referred to here corresponds to the distance between the pin contact positions on the adjacent contact patterns. The distance between the lens-side contact patterns is the distance between one lens-side contact pattern in the mounting circumferential direction and the adjacent lens-side contact pattern (between the sides when the contact pattern is rectangular). The distance between the lens-side contact patterns has an important meaning in the contact between the lens-side contact pattern and the camera-side contact pin. Further, the pitch between the second camera-side contact pins 202a _x and 202a _{x + 1} (distance between the pin center axes) is also set to P1 in accordance with the pitch P1 of the second lens-side contact patterns 302a _x and 302a _{x + 1.} There is.

Pitch P1 and spacing Q1 is in the range of contact with the second lens-side contact pattern 302a _x of the second camera-side contact pin 202a _x (hereinafter, referred to as contact area) on the assumption that it is W, further below It is decided to satisfy the conditions of.

As the first condition, as shown in FIG. 9 (A), during rotation of the interchangeable lens in the lens mounting / during removal, two second lens one second camera-side contact pins 202a _x is adjacent Do not touch the side contact patterns 302a _x and 302a _{x + 1} at the same time. That is, the interval Q1 is set larger than the width V of the contact range W (Q1> V).

The second condition is that one second lens-side contact pattern 302a _{x + 1} does not simultaneously contact the second camera-side contact pins 202a _x , 202a _{x + 1} adjacent to each other.

Further, as a third condition, even narrow the distance between them by the position error of each of the second lens side contact pattern 302a _x, that satisfies the first and second conditions.

By satisfying the first to third conditions, the adjacent second lens-side contact patterns 302a _x , 302a _{x + 1} and the adjacent second camera-side contact pins 202a _x , 202a _{x + 1} are simultaneously conducted to conduct a power short circuit, etc. It is possible to avoid the problem of.

Meanwhile, each of the pitch and the spacing between the first lens side contact pattern 302a _y (302a ₁₎ and the second lens side contact pattern _{302a y + 1 (302a 2)} , shown in FIG. 7 (B) and FIG. 8 (B) As described above, P2 and Q2 are set to be larger than P1 and Q1. The first and second lens-side contact pattern 302a _y, in accordance with the pitch P2 between 302a _{y + 1,} the first and second camera side contact pins 202a _y, (distance between the center of the pin axis) pitch between 202a _{y + 1} is also It is set to P2.

Determination of pitch P2 and spacing Q2 is that first of all the camera-side contact pins 202a ranges may contact with the first lens-side contact pattern 302a _y of _y (contact expected range) becomes W larger WW As a premise. The width of the first lens side contact pattern 302a _y With this also assumes that becomes L1 greater than L2. Then, the pitch P2 and the interval Q2 are determined so as to satisfy the following conditions.

As the first condition, as shown in FIG. 9 (B), during rotation of the interchangeable lens when the lens mounting / removal, the first and second lens side first camera-side contact pins 202a _y are adjacent to each other contact patterns 302a _y, not simultaneously contact 302a _{y + 1.} That is, the interval Q2 is set larger than the width VV of the assumed contact range WW (Q2> VV). In addition, P2> VV.

In FIG. 9 (C) shows a case where the first and second lens-side contact pattern 302a _y, the pitch and the spacing between 302a _{y + 1} is set to P1, Q1 adjacent. In this case, the first camera-side contact pins 202a _y is, first and second lens-side contact pattern 302a _y, thereby simultaneously contact 302a _{y + 1.}

As described above, the camera-side contact pin 202a ₁ may be tilted or deformed due to the contact (collision) of the lens-side contact seat 302. Here, when the camera-side contact pin 202a ₁ comes into contact with the DTEF terminal pattern 302a ₁ which is the first lens-side contact pattern 302a ₁ and the second lens-side contact pattern DGND terminal pattern 302a ₂ adjacent thereto at the same time, it is as follows. Problems occur. As described above, the camera microcomputer 20 determines the type of the mounted interchangeable lens 100 based on the voltage value of the DTEF_IN terminal. If the camera-side contact pin 202a ₁ comes into contact with the DTEF terminal pattern and the DGND terminal pattern at the same time, the DTEF terminal pattern and the DGND terminal pattern are in a conductive state, and the camera microcomputer 20 erroneously determines the lens type. There is a risk. Since the camera microcomputer 20 sets the communication voltage with the interchangeable lens 100 based on the determination result here, if it is determined that the lens is of a different type from the actually mounted interchangeable lens, an appropriate communication voltage is not set. You will not be able to communicate correctly. Therefore, in this embodiment, in consideration of the inclination and deformation of the camera-side contact pin 202a ₁ , the distance between the first lens-side contact pattern 302a ₁ and the adjacent second lens-side pattern 302a ₂ is widened. There is.

As a second condition, that one of the first lens side contact pattern 302a _{y + 1} does not contact the first and second camera side contact pin 202a _y adjacent to 202a _{y + 1} at the same time.

Then, as a third condition, the position error of the first lens side contact pattern 302a _y even narrow the distance between them, to satisfy the first and second conditions.

By satisfying the third condition from the first, the first and second lens side contact adjacent patterns 302a _y, 302a _{y + 1} and the adjacent first and second camera side contact pins 202a _y, 202a _{y + 1} at the same time It is possible to prevent problems such as power shortage due to conduction.

In FIGS. 3A and 3B, the pitches P1 and P2 are formed in an arc shape on the camera side and lens side mounts 201 and 301 on the camera side and lens side contact seats 202 and 302. It is shown as _P1 and θ _P2 . Further, in FIG. 3B, the intervals Q1 and Q2 are shown as the angle ranges θ _Q1 and θ _Q2 on the lens-side contact seat 302 formed in an arc shape on the lens-side mount 301.

Originally, considering the amount of rotation when the bayonet is connected, it is preferable to reduce the pitch between the contact pins on the camera side as much as possible within the range where the above-mentioned power shortage or the like does not occur so that the amount of rotation does not increase. However, as described above, the pitch between the first camera-side contact pin 202a ₁ and the second camera-side contact pin 202a ₂ adjacent thereto is _{first due} to the contact (collision) of the lens-side contact seat 302. It is necessary to consider that the contact pin 202a ₁ on the camera side is tilted or deformed. Therefore, in this embodiment, the pitch between the first camera-side contact pin 202a ₁ and the second camera-side contact pin 202a ₂ adjacent thereto is wider than the pitch between the other second camera-side contact pins. ..

In this embodiment, the case where one first lens-side contact pattern is provided is described, but a plurality of first lens-side contact patterns may be provided together with the first camera-side contact pin. .. In this case, as shown in FIG. 10, respectively even pitch and spacing between the first lens side contact pattern 302a _y and other adjacent thereto a first lens side contact pattern 302a y + _1, set to P2 and Q2 It is good to do. Further, the pitch between the first and second camera-side contact pins corresponding to the first and second lens-side contact patterns adjacent to each other is also set to P2. However, the pitch and spacing between the first and second lens-side contact patterns that are adjacent to each other do not necessarily have to be the same as the pitch and spacing between the two first lens-side contact patterns that are adjacent to each other. That is, when the former pitch and interval are P2a and Q2a and the latter pitch and interval are P2b and Q2b,
P2a ≠ P2b (where P1 <P2a)
Q2a ≠ Q2b (where Q1 <Q2a)
It may be. In this case, the pitch between the first lens-side contact patterns adjacent to each other and the pitch between the first and second camera-side contact pins adjacent to each other are set to P2a and P2b, respectively.

As described above, in this embodiment, the first and second lens-side contact patterns and the first and second camera-side contact pins that satisfy the following conditions (1) to (3) are used. As described above, P2 and Q2 include the above-mentioned P2a, P2b, Q2a and Q2b.
L1 <L2 (θ _L1 <θ _L2 )… (1)
P1 <P2 (θ _P1 <θ _P2 )… (2)
Q1 <Q2 (θ _Q1 <θ _Q2 )… (3)
As a result, even if the lens-side contact seat is strongly in contact with the first camera-side contact pin and the first camera-side contact pin is tilted or deformed, the first camera-side contact pin comes into contact with the first camera-side contact pin. It is possible to ensure normal contact (electrical connection) with the first lens-side contact pattern that should be. Therefore, it is possible to prevent the occurrence of a communication error between the camera and the interchangeable lens due to the failure of such normal contact, and the occurrence of malfunction of the camera or the interchangeable lens due to a short power supply.

Further, as a condition on the operation at the time of mounting of the interchangeable lens to the camera (or control on), it is desirable to satisfy the fourth condition that the distance L _A where the aforementioned distance L _B is less than or the same. That is, it is desirable that at least one of the width L2, the pitch P2, and the interval Q2 is set so that the DTEF terminal is connected earlier than or at the same time as the MIF terminal.
<< About the diameter of the contact pin on the camera side >>
As described above, the first camera-side contact pin 202a y _{(202a 1)} is such bends by impinging strongly mounted in abutment on the lens side contact base 302, there is a risk of deformation. Such deformation, FIG. 12 (A), the of (B), the diameter φD2 of the first camera-side contact pin 202a _y second camera-side contact pin _{202a y + 1 (202a 2 ~202a} 9) It can be suppressed by increasing the rigidity of the _first camera-side contact pin 202a ₁ by making the diameter larger than φD1.

That is, the diameter φD2 of the first camera-side contact pin and the diameter φD1 of the second camera-side contact pin may be set so as to satisfy the following condition (4).
φD1 <φD2 ... (4)
Thus, it is possible to make it difficult to communication error or power short circuit caused by the deformation of the first camera-side contact pin 202a _y more occur.

The conditions (1) to (4) described above do not necessarily have to be all satisfied, and at least one of the conditions (1), (2) and (4) may be satisfied. If at least one of the conditions (1), (2) and (4) is satisfied, normal contact between the tilted or deformed first camera-side contact pin and the first lens-side contact pattern is ensured. It is possible. Then, if the condition (3) is satisfied, the above-mentioned problem of power shortage can be avoided.

Moreover, appropriate for the type of the above-mentioned distance L _A is a distance L _B is smaller than (L _B is greater than L _A) or condition that is the same that is also satisfied, it mounted interchangeable lens to the camera communication The voltage can be set before communication between the camera and the interchangeable lens is initiated. Therefore, it is possible to avoid the occurrence of a communication error due to an inappropriate communication voltage setting.

16, 17, and 18 show the configuration of the camera-side mount 201 using the mold mount. FIG. 16 shows the internal configuration of the camera side mount 201 and the camera 10 when the camera 10 is viewed from the front (direction facing the camera side mount). FIG. 17 shows the internal configuration of the camera 10 when the camera 10 is viewed from the back. Further, FIG. 18 shows the camera side mount 201 in an exploded manner.

The configurations shown in FIGS. 16 to 18 are basically the same as the configurations shown in FIGS. 2 to 4, and the members common to the members shown in FIGS. 2 to 4 are shown in FIGS. 2 to 4. The same reference numerals as 4 are added to replace the description. However, in FIGS. 16 to 18, in the camera-side mount 201, in particular, a ring-shaped member having a mount reference surface 201b and a camera-side bayonet claw 201a _{1 to} 201a ₃ (shown by 201a in FIG. 2A) is provided. It is called a mold mount 201A. The mold mount 201A is formed by molding with a resin such as polycarbonate containing glass fibers.

16 to 18 show a case where the camera side mount 201 is composed of a mold mount 201A, a mount base plate 208, a mount spring 222, a lock pin 205, and the like.

Further, FIG. 18 shows a contact spring 220 as a leaf spring, which is used in place of the contact springs 202b _{1 to} 202b ₉ as the coil spring shown in FIG. Further, in FIG. 18, the base end portions of the camera-side contact pins 202a _{1 to} 202a ₉ are the tips of the nine wiring portions of the flexible printed wiring board 221 used in place of the flexible printed wiring board 206 shown in FIG. It shows the case where it is fixed to and electrically connected.

The flexible printed wiring board 221 and the contact spring 220 are fixed to the back surface of the mount base plate 208 by two screws 223 so as to overlap in this order. The camera-side contact seat 202 described above is formed on the mount base plate 208.

The flexible printed wiring board 221 is formed with a hole 221c through which the fastening screw 204a at the lowest position, which will be described later, penetrates. A first drawer portion 221a and a second drawer portion 221b are provided on both sides of the hole portion 221c in the circumferential direction of the mount. The first drawer portion 221a is provided with six wiring portions for the camera-side contact pins 202a _{4 to} 202a ₉ . Further, the second drawer portion 221b is provided with three wiring portions for the camera-side contact pins 202a _{1 to} 202a ₃ .

The contact spring 220 is arranged between the camera side mount 201 (mount base plate 208) and the camera body 209, and the camera side contact pins 202a _{1 to} 202a ₉ are attached to the camera side contact seats by each of the nine spring arms. It is urged in the direction protruding from 202. The contact spring 220 is also formed with a hole 220c through which the fastening screw 204a at the lowest position penetrates. Then, on both sides of the hole 220c in the mount circumferential direction, and six spring arms of the camera-side contact pin 202a ₄ ~202a _9, 3 pieces of the spring arm for the camera-side contact pin 202a ₁ ~202a ₃ There is a part.

By using the mold mount 201A manufactured by molding with resin as described above for the camera side mount 201, there is a possibility that the strength will be insufficient as compared with the case of using a metal mount. During dropping of the camera described in FIG. 19, a mold of the mount 201A 3 one formed of the camera-side bayonet claws 201a ₁ ~201a _3, the camera-side bayonet formed angular range including the lowest position of the mold mounting 201A The maximum external force acts on the claws 201a ₂ .

Here, the horizontally long posture of the camera 10 as shown in FIG. 16 is referred to as a normal posture (or a horizontal posture). The lowest position of the mold mount 201A (that is, the camera side mount 201) is the camera indicated by the alternate long and short dash line B extending in the gravity direction from the center O of the camera side mount 201 when the camera 10 is in the normal posture among the mold mount 201A. The position on the center line of the side mount. In other words, among the positions of the mold mount 201A in the circumferential direction of the mount, the lowest position when the camera 10 is in the normal posture is the lowest position of the mold mount 201A. Similarly, among the positions of the camera-side contact seat 202 in the mount circumferential direction, the lowest position when the camera 10 is in the normal posture (the position on the camera-side mount center line B) is the camera-side contact. It is the lowest position of the seat 202.

Reference numerals 204a to 20f are fastening screws for fixing the mold mount 201A to the camera body 209 shown in FIG. 18, and are arranged at six locations in the circumferential direction of the mold mount 201A at equal intervals. Of these six fastening screws 204a to 20f, the fastening screw 204a is arranged so that its center is located at the lowest position on the mold mount 201A. In this way, the camera-side bayonet claw 201a ₂ and the fastening screw 204a are arranged at the lowest position where the maximum external force acts when the camera 10 to which the interchangeable lens 100 is attached is dropped, so that the impact at the time of dropping is generated. On the other hand, sufficient strength can be secured.

The mold mount 201A is formed with a hole through which the lock pin 205 can penetrate, and the lock pin 205 projects or retracts with respect to the mold mount 201A through the hole.

Further, a shutter unit 226 is arranged inside the camera 10. The shutter unit 226 has a shutter curtain (not shown) that is charged to a closed state by the rotational operation of the shutter charge motor 226a, which is an actuator on the camera side. The shutter curtain moves in the opening direction with respect to the shutter opening 226b when the charge is released, and then moves while being charged again in the closing direction to control the exposure amount of the image sensor 11 shown in FIG. To do. The shutter charge motor 226a generates noise when rotating to charge the shutter curtain. The shutter charge motor 226a is provided on the right side with respect to the camera-side mount center line B in the front view shown in FIG.

A battery 227 is arranged on the left side of the camera-side mount center line B. In the front view shown in FIG. 16, the left side portion of the mold mount 201A overlaps with the battery 227. However, the two fastening screws 204b and 204c provided on the left side of the mold mount 201A are arranged at positions that avoid interference with the battery 227. Therefore, the battery 227 can be brought closer to the center O of the mold mount 201A (camera side mount 201), and the camera 10 can be miniaturized.

As shown in FIGS. 2 (A) and 3 (A), the camera-side contact pins 202a _{1 to} 202a ₉ are arranged on the camera-side contact seat 202 in the circumferential direction of the mount.

In FIG. 18, 222 is a mount spring, and spring pieces 222a ₁ , 222a ₂ , and 222a ₃ are provided at three locations in the circumferential direction. The spring piece portions 222a _{1 to} 222a ₃ pull the lens-side bayonet claws 301a (see FIG. 2B) engaged with the camera-side bayonet claws 201a _{1 to} 201a ₃ toward the camera body 209, respectively.

A static pressure receiving portion 201d is provided on the back side of the bayonet claws 201a _{1 to} 201a ₃ on the camera side. The static pressure receiving portion 201d comes into contact with the lens side bayonet claw 301a when a load equal to or more than a predetermined value on the side opposite to the camera body 209 side acts on the mount spring 222 (spring piece portions 222a _{1 to} 222a ₃ ). It has a function of holding the interchangeable lens without passing through the mount spring 222. In the camera-side bayonet claw 201a ₂ formed in an angle range including the lowest position in the mold mount 201A, the static pressure receiving portion 203d is formed at the lowest position.

In the camera-side mount 201 configured in this way, the fastening screw 204a is arranged at the lowest position of the mold mount 201A as described above. Therefore, the contact spring 220 is arranged between the camera side mount 201 (mount base plate 208) and the camera body 209 so as to avoid the fastening screw 204a. Specifically, the nine spring arms of the contact spring 220 are directed toward the camera side contact pins 202a _{1 to} 202a ₉ from both sides of the fastening screw 204a (camera side mount center line B) in the mounting circumferential direction. Side mounts are arranged so as to extend closer to the center line B.

In this case, sufficient to maintain contact with the biasing force generated in the nine spring arms of the contact spring 220, a lens side contact pattern 302a ₁ ~302a ₉ camera side contact pin 202a ₁ ~202a ₉ And it is preferable to make it uniform. Moreover, it is necessary to make the contact unit including the camera-side contact pins 202a _{1 to} 202a ₉ (flexible printed wiring board 221) and the contact spring 220 as small as possible. For this purpose, it is necessary to make the width, length and deformation amount of each of the nine spring arms of the contact spring 220 the same.

Assuming that the camera-side contact pin is provided at the lowest position of the camera-side contact seat 202 directly above the fastening screw 204a and the width and length of the nine spring arms of the contact spring 220 are the same, the fastening screw 204a It is necessary to increase the inclination of the spring arm portion extending from the side to the contact pin on the camera side. As a result, the pitches of the camera-side contact pins 202a _{1 to} 202a _{9 as well as} the pitches of the _nine spring arms of the contact spring 220 must be widened beyond the above-mentioned conditions required for the pitch. As a result, the angle range occupied by the camera-side contact pins 202a _{1 to} 202a ₉ (hereinafter referred to as the occupied angle range) increases in the mounting circumferential direction.
Further, at the lowest position of the camera side mount 201 that receives the maximum load when the camera 10 is dropped, even if it is firmly fixed by the fastening screw 204a, the camera side arranged at the lowest position on the camera side contact seat 202. Maximum impact is applied to the contact pins. In order to avoid problems such as bending and breaking of the camera-side contact pin due to such an impact, it is preferable not to provide the camera-side contact pin at the lowest position of the camera-side contact seat 202.

Therefore, in this embodiment, the camera-side contact pins 202a _{1 to} 202a ₉ are set to positions in the camera-side contact seat 202 in the mounting circumferential direction, excluding the lowest position when the camera 10 is in the normal posture. It is arranged. Thus, while reducing the occupation angle range of the camera-side contact pin 202a ₁ ~202a _9, to allow energization of the adequate and uniform protruding direction of the camera-side contact pin 202a ₁ ~202a _9, upon further camera fall Impact resistance can be improved.

Further, in FIG. 17, 224 is a circuit board, and 225 is a power supply circuit block provided on the circuit board 224. Further, 226 shown by a broken line in FIG. 17 is a connector connected to the terminal of the battery 227. The connector 226 is connected to the battery 227 via the + pole 226a, the-pole 226b and the information terminal 226c, and supplies power to the power supply circuit block 225.

On the circuit board 224, 224a is a first connector connected to the first lead-out portion 221a of the flexible printed wiring board 221 and 224b is connected to the second lead-out portion 221b of the flexible printed wiring board 221. It is a connector of 2. Here, in the following description, in each of the camera side and lens side mounts, the power supply circuit block 225 side (one of them) is more than the mount center line (camera side and accessory side mount center line) extending in the gravity direction from the center of the mount. The side) is simply called the power supply circuit side. Further, the side (the other side) of the shutter charge motor 226a with respect to the mount center line is simply referred to as the motor side.

Of the camera-side contact pins 202a _{1 to} 202a ₉ , the VBAT terminal pin 202a ₇ , which is a power supply contact pin, is arranged on the power supply circuit side together with the PGND terminal pin 202a ₆ . That is, the VBAT terminal pin 202a ₇ through which a large current flows is closer to the power supply circuit block 225 than when it is arranged on the motor side. As a result, loss due to wiring resistance of the circuit board 224 and the flexible printed wiring board 221 when a current for power supply flows from the power supply circuit block 225 to the VBAT terminal pin 202a ₇ can be suppressed.

Further, the first lead-out portion 221a connected to the six camera-side contact pins 202a _{4 to} 202a ₉ of the flexible printed wiring board 221 is arranged on the power supply circuit side. On the other hand, the second pull-out portion 221b connected to the _three camera-side contact pins 202a _{1 to} 202a 3 of the flexible printed wiring board 221 is arranged on the motor side. That is, the number of camera-side contact pins 202a _{4 to} 202a ₉ arranged on the power supply circuit side is larger than the number of camera-side contact pins 202a _{1 to} 202a ₃ arranged on the motor side. As a result, it is possible to realize a configuration that is not easily affected by noise from the shutter charge motor 226a with respect to signal exchange between the camera 10 and the interchangeable lens 100.

Note that FIGS. 16 to 18 show the configuration on the camera 10 side, and the configuration on the interchangeable lens 100 side is not particularly shown. However, with respect to the camera 10 in the normal posture, the lens side contact patterns 302a _{1 to} 302a _{3 in} the interchangeable lens 100 in the fully coupled state are arranged so that the camera 10 described with reference to FIGS. 16 to 18 is in the normal posture. Follow the arrangement of the camera-side contact pins 202a _{1 to} 202a _{3 at} the time.

That is, among the positions of the lens-side contact patterns 302a _{1 to} 302a ₉ in the mounting circumferential direction on the lens-side contact seat 302, the lowest position (the lowest position in the coupling completed state when the camera 10 is in the normal posture). It is placed at a position other than the accessory side mount center line).

Further, the interchangeable lens 100 in the fully coupled state with respect to the camera 10 in the normal posture is viewed from the direction facing the lens side mount. At this time, among the lens-side contact patterns 302a _{1 to} 302a ₉ , the VBAT terminal pattern 302a ₇ which is the power supply contact surface is the power supply circuit side of the camera 10 (hereinafter, simply the power supply circuit side) together with the PGND terminal pattern 302a _6. It is placed in). Further, the number of lens-side contact patterns 302a _{4 to} 202a ₉ arranged on the power supply circuit side is the number of lens-side contact patterns 302a _{1 to} 302a ₃ arranged on the motor side of the camera 10 (hereinafter, simply referred to as the motor side). More than.

As described above, in this embodiment, the camera side contact pins 202a _{1 to} 202a ₉ and the lens side contact patterns 302a _{1 to} 302a ₉ are connected to the contact seats 202 and 302 when the camera 10 is in the normal posture (and in a fully coupled state). It was placed at a position other than the center line of the mount. Therefore, the occupied angle range of the contact pin / contact pattern in each mount can be reduced. Therefore, the camera 10 and the interchangeable lens 100 can be miniaturized. Further, in this embodiment, the contact pins 202a ₇ and the contact pattern 302a ₇ for power supply on the camera side and the lens side are arranged on the power supply circuit side, and the number of contacts arranged on the power supply circuit side is arranged on the motor side. More than the number of contacts made. As a result, it is possible to realize a configuration in which the loss due to the wiring resistance is small and the noise resistance is strong.

In this embodiment, the case where the fastening screw 204a is provided at the lowest position of the mold mount 201A has been described. However, even if a boss or the like for positioning the mold mount 201A in the mounting circumferential direction is provided instead of the fastening screw 204a, the contact pin and contact pattern arrangement described in this embodiment can be adopted. , The above-mentioned effect can be obtained. Further, the configuration shown in FIGS. 16 to 18 may be applied when a metal mount is used instead of the mold mount 201A.

11 (A) to 11 (C) show the cases where the above-mentioned conditions (2) and (3) are satisfied but the conditions (1) and (4) are not satisfied as Example 2 of the present invention. .. In this embodiment, the first and second lens-side contact pattern 302a _y adjacent pitch P2 and spacing P2 between 302a _{y + 1,} the second lens side contact pattern 302a _x adjacent to each other, the pitch between 302a _{x + 1} Greater than P1 and interval Q1. Also, larger pitch P1 between the first and second camera side contact pins 202a _y, also pitch P2 between 202a _{y + 1,} a second camera-side contact pins 202a _x adjacent to each other, 202a _{x + 1} adjacent to each other.

However, the width of the first lens side contact pattern 302a _y is the same as L1 and the width of the second lens side contact pattern _{302a x (302a y + 1)} . However, L1 here is greater than L1 shown in Example 1, than the range in which the first camera-side contact pins 202a _y may contact the first lens side contact pattern 302a _y (contact expected range) WW Is also set slightly larger.

Further, the first and second camera side contact pins _{202a y, 202a y + 1 (} 202a x, 202a x + 1) is the diameter of all the same .phi.D1.

Even in this case, normal contact between the tilted or deformed first camera-side contact pin and the first lens-side contact pattern can be ensured, and a communication error or power short-circuit occurs between the camera and the interchangeable lens. Can be prevented.

In addition to the second embodiment, even if the condition (2) is satisfied but the conditions (1), (3), and (4) are not satisfied, the first camera-side contact pin and the first one that are tilted or deformed. Normal contact with the contact pattern on the lens side can be ensured. As a result, it is possible to prevent the occurrence of a communication error between the camera and the interchangeable lens.

In each of the above embodiments, the case where the heights of the first and second lens-side contact patterns are both set to L3 has been described, but these may be different.

Each of the above-described examples is only a representative example, and various modifications and changes can be made to each of the examples in carrying out the present invention.

Camera accessories such as interchangeable lenses that allow good electrical connection to the camera can be provided.

201 camera mount 201a camera side bayonet claws 202 camera side contact base 202a _n camera side contact pin 301 lens mount 301a lens side bayonet claws 302 lens side contact base 302a _n lens side contact pattern

Claims (14)

An image pickup device equipped with a first mount on which accessories can be attached.
Power circuit and
Actuator and
It has a plurality of contact pins used for electrical connection with a plurality of contact surfaces provided in the accessory.
Each of the plurality of contact pins is arranged along the shape of the first mount portion, and the first is used to supply power to the accessory with the accessory attached to the imaging device. A contact pin and a second contact pin, and a third contact pin used to indicate the type of the attached accessory.
When the image pickup device is viewed from the side facing the first mount portion, the first contact pin and the second contact pin are separated from the actuator by the third contact pin and the power supply circuit. The third contact pin is arranged closer to the actuator and away from the power supply circuit than the first contact pin and the second contact pin. Imaging device. The accessory includes a second mount portion that can be attached to and detached from the first mount portion, and the first mount portion has a contact surface that comes into contact with the second mount portion.
When the image pickup device is viewed from the side of the first mount portion facing the contact surface, the first contact pin and the second contact pin are more actuators than the third contact pin. The third contact pin is located closer to the actuator and away from the power circuit than the first contact pin and the second contact pin. The imaging device according to claim 1. The plurality of contact pins are a fourth contact pin used for receiving communication data output from the accessory with the accessory attached to the image pickup device , and communication data from the image pickup device to the accessory. Includes a fifth contact pin, which is used to output
When the imaging device is viewed from the side facing the first mount portion, the fourth contact pin and the fifth contact pin are separated from the actuator by the third contact pin and the power supply circuit. The imaging apparatus according to claim 1 or 2, wherein the image pickup apparatus is arranged in the vicinity of the above. The plurality of contact pins include a sixth contact pin used for transmitting a clock signal for communication to the accessory with the accessory attached to the imaging device.
When the imaging device is viewed from the side facing the first mount portion, the sixth contact pin is separated from the power supply circuit by the first contact pin and the second contact pin, and the actuator. The image pickup apparatus according to claim 3, wherein the image pickup apparatus is arranged in the vicinity of the above. The plurality of contact pins include a seventh contact pin for indicating a reference potential corresponding to the first contact pin and an eighth contact pin for indicating a reference potential corresponding to the second contact pin. Including
When the image pickup device is viewed from the side facing the first mount portion, the seventh contact pin is located closer to the power supply circuit than the third contact pin, away from the actuator. The imaging according to claim 4, wherein the eighth contact pin is located closer to the actuator than the first contact pin and the second contact pin, away from the power supply circuit. apparatus. The plurality of contact pins include a ninth contact pin used for detecting that the accessory is attached to the imaging device while the accessory is attached to the imaging device.
When the image pickup device is viewed from the side facing the first mount portion, the ninth contact pin is located closer to the power supply circuit than the third contact pin, away from the actuator. The imaging device according to claim 5, characterized in that. The plurality of contact pins are the first contact pin, the eighth contact pin, the sixth contact pin, and the third contact pin along the relative rotation direction when the accessory is attached to the imaging device. The feature is that the fourth contact pin, the fifth contact pin, the seventh contact pin, the first contact pin, the second contact pin, and the ninth contact pin are arranged in this order. The imaging device according to claim 6. An accessory having a first mount that can be attached to and detached from an image pickup device equipped with a power supply circuit and an actuator.
It has a plurality of contact surfaces used for electrical connection with a plurality of contact pins provided in the image pickup apparatus.
The plurality of contact surfaces are arranged along the shape of the first mount portion, and in a state where the accessory is attached to the image pickup device, power is supplied from the image pickup device to the accessory. It includes a first contact surface and a second contact surface to be used, and a third contact surface used to indicate the type of the accessory mounted on the imaging device.
Looking at the accessory from the side facing the first mount portion, when the accessory is mounted on the imaging device, the first contact surface and the second contact surface are the third contact surface. The third contact surface is located closer to the power supply circuit than the contact surface, and the third contact surface is closer to the actuator than the first contact surface and the second contact surface and away from the power supply circuit. An accessory characterized by being located. The image pickup apparatus includes a second mount portion to which the first mount portion of the accessory can be attached and detached, and the first mount portion has a contact surface that comes into contact with the second mount portion.
Looking at the accessory from the side of the first mount portion facing the contact surface, when the accessory is mounted on the imaging device, the first contact surface and the second contact surface are , The third contact surface is located closer to the power supply circuit than the third contact surface, and the third contact surface is closer to the actuator than the first contact surface and the second contact surface. The accessory according to claim 8, wherein the accessory is arranged away from the power supply circuit in the near future. The plurality of contact surfaces are a fourth contact surface used for outputting communication data from the accessory to the imaging device in a state where the accessory is attached to the imaging device, and are output from the imaging device . Includes a fifth contact surface used to receive communication data,
Looking at the accessory from the side facing the first mount portion, when the accessory is mounted on the imaging device, the fourth contact surface and the fifth contact surface are the third contact surface. The accessory according to claim 8 or 9, wherein the accessory is arranged closer to the power supply circuit than the contact surface, away from the actuator. The plurality of contact surfaces include a sixth contact surface used for receiving a communication clock signal output from the image pickup device while the accessory is attached to the image pickup device.
When the accessory is viewed from the side facing the first mount portion and the accessory is mounted on the imaging device, the sixth contact surface is the first contact surface and the second contact surface. The accessory according to claim 10, wherein the accessory is arranged closer to the actuator than the contact surface, away from the power supply circuit. The plurality of contact surfaces include a seventh contact surface for showing a reference potential corresponding to the first contact surface and an eighth contact surface for showing a reference potential corresponding to the second contact surface. , Including
Looking at the accessory from the side facing the first mount portion, when the accessory is mounted on the imaging device, the seventh contact surface is more from the actuator than the third contact surface. The eighth contact surface is located closer to the power supply circuit than the first contact surface and the second contact surface, and is located closer to the actuator than the first contact surface and the second contact surface. 11. The accessory according to claim 11. The plurality of contact surfaces include a ninth contact surface used to indicate that the accessory is attached to the imaging device while the accessory is attached to the imaging device.
Looking at the accessory from the side facing the first mount portion, when the accessory is mounted on the imaging device, the ninth contact surface is more from the actuator than the third contact surface. The accessory according to claim 12, characterized in that it is located near the power supply circuit. The plurality of contact surfaces are the ninth contact surface, the second contact surface, the first contact surface, and the first contact surface along the relative rotation direction when the accessory is attached to the imaging device. 7. The contact surface, the fifth contact surface, the fourth contact surface, the sixth contact surface, the eighth contact surface, and the first contact surface are arranged in this order. The accessory according to claim 13.