JP6529535B2 - Camera accessories and cameras - Google Patents

Description

  The present invention relates to a camera and a camera accessory such as an interchangeable lens that is exchangeably mounted on the camera.

  A camera accessory (hereinafter simply referred to as an accessory) receives power supply from the camera and communicates commands, data, and the like with the camera in a state of being attached to the camera. In order to enable such power supply and communication, mounting portions (mounts) of the camera and the accessory are provided with a plurality of contacts electrically connected by being in contact with each other. Also, in the attachment (coupling) of the camera and the accessory, a bayonet coupling method is often adopted in which those mounts are relatively rotated to engage the bayonet claws provided for each.

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

  Recently, for the purpose of reducing the weight of the camera, the mount is manufactured by molding with resin. The mount thus molded is hereinafter referred to as a mold mount. Further, in order to thin the camera, a contact spring for urging the camera side electric contact pin in the projecting direction may be configured by a plate spring.

  Furthermore, the camera side and lens side contact pins exchange power supply contact pins for supplying power for driving the actuator in the accessory from the camera to the accessory, and exchange signals for controlling the accessory Control contact pins are included.

Japanese Patent Application Laid-Open No. 62-195633

  The cameras and accessories provided with contact pins on the mount (in particular, the mold mount) as described above have the following problems.

  FIG. 19 shows a state in which 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, at the lowermost part of the mount connecting the camera 401 and the interchangeable lens 402, the largest external force that tries to peel off the mount is generated. For this reason, while arranging the engagement part of the bayonet nail in the phase including the lower part of the camera side and the lens side mount, the attachment part 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 the leaf spring is used as a contact spring for biasing the same in the projecting direction, the leaf spring must be arranged to avoid the fastening screw. It is necessary to increase the pitch between the contact pins. This increases the occupied angular range of the contact pins in the mount, 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 etc. The noise generated by the motor may affect the control of the accessory on the lens side and may cause the accessory to malfunction. is there.

  Further, although wiring from the power supply circuit provided in the camera to the power supply contact pins is made by a flexible substrate or the like, if the length of the wiring is long, there is a possibility that the loss due to the wiring resistance may increase.

  The present invention provides a camera and a camera accessory which can be miniaturized with a small occupancy angle range of contacts in the mount. The present invention also provides a camera and camera accessory that has low loss due to wiring resistance with respect to power supply and is also resistant to noise.

A camera accessory according to one aspect of the present invention is a camera accessory provided with an arc-shaped mount capable of mounting a camera having a power supply circuit and an actuator, and is disposed circumferentially along the arc of the mount. A plurality of contact surfaces, wherein the plurality of contact surfaces can be electrically connected to the camera when the camera accessory is mounted on the camera, and receive power supply from the camera A second contact surface used for communication of communication data between the camera accessory and the camera, and a third contact surface used to indicate the type of the camera accessory mounted on the camera includes a contact surface, wherein the plurality of contact surfaces, in the normal position of the camera in a state where the camera accessory is attached to the camera, of the mounting portion When sincerely the line mount center line extending in the direction of gravity, first the on the side of the first contact surface and the second contact surface on which the power supply circuit with respect to the mount center line is located, positioned, The third contact surface may be positioned on a second side opposite to the first side with respect to the mount center line and on which the actuator is positioned.

A camera according to another aspect of the present invention is a camera provided with a first arc-shaped mount unit to which a camera accessory can be attached, and the power supply circuit, the actuator, and the first mount unit And a plurality of contact pins arranged in the circumferential direction along the arc shape, and a line extending in the direction of gravity from the center of the mount portion at the normal position of the camera is the mount center line . The contact pin is electrically connectable to the camera accessory when the camera accessory is mounted on the camera, and the first contact pin used to supply power to the camera accessory; and the camera A second contact pin used for communication data communication between the camera accessory and the camera accessory, and the camera accessory attached to the camera, And a third contact pin used to indicate the type of camera accessory, wherein the plurality of contact pins, in a state where the camera accessory is mounted on the camera, the power supply circuit is positioned relative to said mounting center line The first contact pin and the second contact pin are located on the first side, and the second side opposite to the first side with respect to the mount center line and on which the actuator is located In which the third contact pin is located.

  According to the present invention, since the plurality of camera-side contact pins are arranged at positions excluding the mount center line in the normal posture in the camera-side contact holding portion, each of the plurality of camera-side contact pins in the plate spring is attached. The pitch of the part to be turned can be reduced. Therefore, the occupied angle range of the plurality of camera side contact pins can be reduced, and the camera can be miniaturized. Further, according to this, since a plurality of accessory side contact surfaces provided in the camera accessory are also arranged, the camera accessory can be miniaturized.

  Further, in the present invention, the power supply contact (contact pin or contact surface) on the camera side and the accessory side is disposed on the power circuit side of the camera, and the number of contacts disposed on the power circuit side rather than the mount center The number of contacts disposed on the side of the camera-side actuator is greater than that of the camera-side actuator. As a result, it is possible to realize a camera and a camera accessory that is resistant to noise due to wiring resistance in power supply and is resistant to noise.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the electric constitution of the interchangeable lens which is Example 1 of this invention, and a camera with which this is mounted | worn. FIG. 2 is a view showing the configuration of a mount and a connector provided in the interchangeable lens of Example 1 and the camera. The enlarged view of the said connector. Sectional drawing of the said connector. FIG. 7 is a view showing a state of contact of the connector in a process of combining the interchangeable lens of Example 1 and a mount provided to the camera. The enlarged view of (4)-(8) in FIG. FIG. 6 is a view showing a lens side contact pattern in Example 1; FIG. 7 is a view showing a camera side contact pin in a coupling completion state in the first embodiment. FIG. 6 is a view showing a camera side contact pin in an intermediate rotation state of a mount in Embodiment 1. FIG. 8 is a view showing a camera side contact pin in a modification of the first embodiment. The figure which shows the lens side contact pattern in Example 2 of this invention, and a camera side contact pin. FIG. 7 is a view showing a camera side contact pin in another modified example of the first embodiment. FIG. 7 is a block diagram showing the connection between the lens type determination unit of the first and second interchangeable lenses and the camera microcomputer in Embodiment 1. FIG. 2 is a block diagram showing a configuration of a voltage conversion unit in Embodiment 1. 5 is a timing chart showing an example of input / output timing of the camera microcomputer in Embodiment 1. FIG. 3 is a front view showing the configuration of a camera that is a camera of the practical row 1 and that uses a mold mount. FIG. 17 is a rear view showing the configuration of the camera shown in FIG. 16; FIG. 17 is an exploded perspective view of a mount of the camera shown in FIG. 16; The figure which shows a mode that external force acts, when a camera falls.

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

  FIG. 1A shows a camera system including an interchangeable lens 100 as a camera accessory which is Embodiment 1 of the present invention, and a camera 10 to which the interchangeable lens 100 is detachably mounted. The camera 10 and the interchangeable lens 100 each have a mount 1 provided with an electrical contact for supplying power from the camera 10 to the interchangeable lens 100 and communicating with each other. In the present embodiment, an interchangeable lens is described as a camera accessory attachable to a camera, but camera accessories other than the interchangeable lens are also included as other embodiments of the present invention.

  The camera 10 has an image sensor (imaging element) 11 which photoelectrically converts an object image as an optical image formed by the photographing lens 101 in the interchangeable lens 100 and outputs an electric signal. The camera 10 also includes an A / D converter 12 that converts an analog electrical signal output from the image sensor 11 into a digital signal, and an image processor 13 that performs various types of image processing on the digital signal to generate a video signal. Have. 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.

  Furthermore, the camera 10 has a function as a buffer when processing a video signal, and has a memory 16 for storing an operation program used by a camera control unit 18 described later. The camera 10 also 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, and a selection / setting switch for setting various menus. The camera control unit 18 includes a microcomputer, and controls the image processing unit 13 according to a signal from the operation input unit 17 or controls communication with the interchangeable lens 100.

  On the other hand, the interchangeable lens 100 has a lens driving unit 102 for driving an actuator for moving or operating a focus lens (not shown) included in the photographing lens 101, a zoom lens, an aperture, and a vibration reduction lens. Furthermore, the interchangeable lens 100 includes a lens control unit 103 including a microcomputer that controls the lens driving unit 102 in accordance with 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 terminal (1-3) is a terminal for communication data output from the interchangeable lens 100 to the camera 10.

  The MIF terminal (1-4) is a terminal for detecting that the interchangeable lens 100 is attached to the camera 10. A 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 terminals (1-5) are terminals 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 source (VM) used for various operations excluding communication control from the camera 10 to the interchangeable lens 100. The VDD terminal (1-7) is a terminal for supplying a communication control power (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 a mechanical drive system including a motor and the like provided in the camera 10 and 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 the first interchangeable lens and the second interchangeable lens having a different communication voltage from the first interchangeable lens. explain. The communication voltage will be described later.

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

  The voltage V1 is a voltage as a communication control power supply (VDD) of the first and second interchangeable lenses and a communication voltage of the first interchangeable lens. The voltage V2 is a communication voltage of the second interchangeable lens. V3 is a voltage as an operation power supply of the camera microcomputer 20. VM is a voltage as a power supply for driving the first and second interchangeable lenses as described above. Although V1 and V2 are voltages different from each other, V1 and V3 or VM may be the same voltage, or V2 and V3 or VM may be the same voltage.

  When the power switch 22 is turned on, the camera microcomputer 20 starts supply of 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 outputs a communication voltage switching signal to the voltage conversion unit 23 and a MIF_IN terminal for detecting 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 And. Furthermore, the camera microcomputer 20 has a CNT_VDD_OUT terminal that outputs an energization signal of the power switch 22, a connection terminal to the image processing unit 13, and a connection terminal to 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 into a voltage V5. A microcomputer (hereinafter referred to as a lens microcomputer) 211 in the lens control unit 103 communicates with the camera microcomputer 20 through the voltage conversion unit 23 described above. The lens microcomputer 211 includes 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 communication data input from the camera 10, and the lens drive unit 102. And a connection terminal.

  The attachment detection to the camera 10 of the interchangeable lens 100 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 GND at 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 It becomes L (Low) at the time.

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

  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 operation power supply of the camera microcomputer 20, and the DTEF terminal is further connected to the DTEF_IN terminal of the camera microcomputer 20 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 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 performs AD conversion on the input voltage value, and compares the AD conversion value with the lens type determination reference that the camera microcomputer 20 has in advance to perform lens type determination.

  For example, when the first interchangeable lens is attached, the AD conversion value of the voltage input to the DTEF_IN terminal is approximately “0x0000” as the resistance ratio RL / (R1 + RL) between 100 KΩ of R1 and 0 Ω of RL. It is decided. For this reason, the camera microcomputer 20 detects that the AD conversion value of the DTEF_IN terminal is in the range of “0x0000 to 0x007F” which is the first lens type determination reference, and the mounted interchangeable lens is the first replacement. It determines that it is 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 approximately determined as “0x02FF” by the resistance ratio RL / (R1 + RL) between 100 KΩ of R1 and 300 KΩ of RL. . Therefore, the camera microcomputer 20 detects that the AD converted value of the DTEF_IN terminal is in the range of “0x0280 to 0x037F” which is the second lens type determination reference, and the attached interchangeable lens is the second replacement. It determines that it is a lens.

  In the above description, although the resistance value of the resistor RL in the first interchangeable lens is 0Ω, it may be directly connected to GND without using a 0Ω resistor.

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 voltages to the OUT terminal according to the logic of the SEL terminal from the two voltages input to the VIN1 terminal and the VIN2 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 a CNT_V_OUT terminal of the camera microcomputer 20 is connected to the SEL terminal. The output of the OUT terminal is 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 the voltage 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. Further, the same V3 as the operation power supply voltage of the camera microcomputer 20 is connected to the VIN terminal, and the V _S output from the voltage selector 51 is connected to the VOUT terminal. 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 V3 which is the same as the operation power supply voltage of the camera microcomputer 20. The V _S output from the voltage selector 51 is connected to the VOUT terminal. 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, the same V3 as the operation power supply voltage of the camera microcomputer 20 is connected to the VOUT terminal. Thus, V _S (that is, V1 or V2) output from the voltage selector 51 is the communication voltage between the camera 10 and the interchangeable lens 100.

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

  As described above, the camera microcomputer 20 determines the type of the attached interchangeable lens 100 based on the voltage value (AD conversion value) input to the DTEF_IN terminal. Then, according to the determination result of the type of the interchangeable lens, the logic output from the CNT_V_OUT terminal is controlled. 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. Control the voltage to V1. If the camera microcomputer 20 determines from the voltage value of the DTEF_IN terminal that the mounted interchangeable lens 100 is the second interchangeable lens, the camera microcomputer 20 outputs L from the CNT_V_OUT terminal to set the communication voltage to V2 Control.

  When a voltage value in a range outside the first and second lens type determination criteria described above is detected as the voltage value (AD converted value) of the DTEF_IN terminal, the camera microcomputer 20 is an interchangeable lens which the camera 10 does not support. It is determined that a certain "non-corresponding lens" is attached. Alternatively, the lens type determination can not be normally performed, and the determination is reserved. 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, the DTEF_IN terminal, the CNT_V_OUT terminal, the 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 voltage input to the DTEF_IN terminal during lens mounting, and t1 indicates the voltage input to the MIF_IN terminal during lens mounting. Further, t2 indicates the camera activation (power ON) time, t3 indicates the lens type determination and the communication voltage setting time, and t4 indicates the energization and communication start time for the attached interchangeable lens 100. Note that t0 and t1 may be simultaneous. Here, although the voltage input timings to the DTEF_IN terminal and the MIF_IN terminal are t0 and t1 described above, the reading timing by the camera microcomputer 20 is the order of reading the voltage value of the DTEF_IN terminal after the MIF_IN terminal becomes L. It has become.

  Regardless of which of the first and second interchangeable lenses is attached, a voltage is input to the MIF_IN terminal (t0, t1) after (or simultaneously with) the voltage input to the DTEF_IN terminal. Then, when the camera is activated (t2), the lens type determination and the setting of the communication voltage according to the determination result are performed (t3), and thereafter, energization and communication of the interchangeable lens 100 are started (t4). After camera activation, an interchangeable lens may be attached to the camera, but in this case, the order of t0, t1 and t2 is reversed, but after the voltage input to the DTEF_IN terminal (or simultaneously with this) ) Is input to the MIF_IN terminal.

  When such an operation (or control) at the time of lens attachment is performed, the DTEF terminal of the mount 1 is used regardless of whether the interchangeable lens 100 is any of the first and second interchangeable lenses and regardless of the timing of camera activation. Needs to be connected earlier (or simultaneously) than the MIF terminal. This is due to the following reasons. As described above, when the MIF_IN terminal becomes L, the camera microcomputer 20 reads the voltage value of the DTEF_IN terminal. Here, if the DTEF terminal is not connected although the MIF_IN terminal becomes L, as described above, the non-compliant lens is determined, and the camera microcomputer 20 does not communicate with the interchangeable lens 100. Therefore, in order to determine the type of the interchangeable lens 100 and communicate with the interchangeable lens 100 with an appropriate communication voltage, it is necessary to connect the DTEF terminal reliably 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 in the mount 1 and the lens side including the lens side contact pattern (accessory side contact surface) constituting the lens side terminal in the mount 1 The configuration of the connector will be described.

FIG. 2 (A) shows the camera side mount 201 viewed from the front (object side) in the optical axis direction, and FIG. 3 (A) shows the camera side connector provided on the camera side mount 201 (camera side contact seat It shows 202 and the camera-side contact pins 202a ₁ ~202a ₉₎ expanded to the. 2B shows the lens side mount 301 viewed from the rear (image side) in the optical axis direction, and FIG. 3B shows the lens side connector (lens side contact) provided on the lens side mount 301. It shows an enlarged seat 302 and the lens-side contact pattern 302a ₁ ~302a _9). Further, FIG. 4 shows a cross section of the camera side connector and the lens side connector in the completely connected state.

  The camera side mount 201 is fixed to a front end portion of a camera body (chassis) (not shown). The camera side mount 201 has a ring-shaped mount reference surface 201b for securing a predetermined flange back at the front end on the outer peripheral side. The camera side bayonet claws 201a are provided at three locations in the circumferential direction (hereinafter referred to as the mount circumferential direction) on the inner side of the mount reference surface 201b. Further, the camera side mount 201 is provided with a lock pin 205 for positioning in the relative rotational 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 portion of the 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, and three lenses in the circumferential direction (mount circumferential direction) inside the mount reference surface 301b It has a side bayonet claw (accessory side bayonet claw) 301a. Further, in the lens side mount 301, a lock hole portion 301c into which the lock pin 205 of the camera side mount 201 is inserted is formed to open at the mount reference surface 301b. The lock hole portion 301c has an inner diameter that engages with the lock pin 205 almost without play in the circumferential direction of the mount (relative rotation direction), and in the radial direction of the lens side mount 301 (hereinafter referred to as the mount radial direction) It is a long hole having an inner diameter 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 mounted (relative rotation).

The camera side contact seat holding eight camera side contact pins 202a ₁ , 202a ₂ ,..., 202a ₉ arranged in the circumferential direction of the mount in a part of the area inside the bayonet claw 201a in the camera side mount 201 ( A camera side contact holding portion) 202 is formed. As shown in FIG. 4, the camera-side contact pin 202a ₁ ~202a ₉ is capable of Dari retracted rearwardly or forwardly projecting respectively, are formed on the camera side contact base 202 has a pin holding hole portion (protruding pull direction Movable) is inserted. A flexible printed wiring board 206 is disposed on the bottom of each pin holding hole. And between the flexible printed wiring board 206 and the flange portion of each camera side contact pin, a contact spring (202b ₁ , 202b ₂₎ which biases the camera side contact pin in the direction of projecting forward from the camera side contact seat 202 , ..., 202b ₉ ) are arranged.

Camera side contact pin 202a ₁ ~202a ₉ is in this order, DTEF terminal explained in FIG. 1 (B), DGND terminal, LCLK terminal, DLC terminal, DCL terminal, PGND terminal, VBAT terminal, VDD pin and MIF terminal 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 .

A lens side contact seat for holding eight rectangular lens side contact patterns 302a ₁ , 302a ₂ ,..., 302a ₉ arranged in the mount circumferential direction in a part of the area inside the bayonet claw 301a in the lens side mount 301 An accessory-side contact holding portion 302 is formed. The shape of the lens side contact pattern may be a shape other than a rectangle, for example, a circle.

The lens side contact patterns 302 a _{1 to} 302 a ₉ are connected to the L_CPU 151 shown in FIG. 1 via the flexible printed wiring board 306. A portion of the lens side contact seat 302 adjacent to the portion holding 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.

Lens side contact pattern 302a ₁ ~302a ₉ is in this order, DTEF terminal, DGND terminal, LCLK terminal, DLC terminal, DCL terminal, PGND terminal, VBAT terminal, VDD terminal and connected camera-side contact pin 202a to MIF terminal It 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 The camera side contact seat 202 is pushed while being pressed. 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.

  (1) to (8) of FIG. 5 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 lock pin 205 and the lock hole portion 301c in the states shown in (1) to (8).

  In (1) of FIG. 5, the lens side mount 301 is brought close to the camera side mount 201 in the optical axis direction until the lens side bayonet claws 301 a are inserted between the two camera side bayonet claws 201 a. Is shown. Hereinafter, the state shown in FIG. 5 (1) is referred to as a state before the mount contact. In (2) of FIG. 5, 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 in the optical axis direction on the camera side mount 201 (mount reference surface 201b). Shows the state of contact. Hereinafter, the state shown in (2) is referred to as a mount abutting state (first state).

  In (3) to (7) of FIG. 5, the lens side mount 301 is in the middle of being rotated toward the coupling complete state (second state) with respect to the camera side mount 201 from the mount abutting state (relative) During rotation: Hereinafter, the intermediate rotation state is shown in stages. (8) of FIG. 5 shows a state in which the lens side mount 301 is rotated with respect to the camera side mount 201 to the coupling complete state.

(2) In the mounted state of contact, pattern holding portion of the lens-side contact base 302 (the lens contact pattern 302a ₉ or the vicinity portion thereof) is brought into contact with camera side contact pin 202a _1. Thus, the camera-side contact pin 202a _1, as compared with the mount contact prior state of (1), is pushed to the camera-side contact base 202.

Say below, of the camera-side contact pins 202a _n of a plurality of (n), the camera-side contact pins 202a ₁ for DTEF terminal abutting the lens side contact base 302 in the mount abutment also with the first camera-side contact pin . Further, other than the first camera side contact pin, that is, refers to the camera-side contact pin 202a ₂ ~202a ₉ which does not come into contact with the lens-side contact base 302 in the mount abutment also a second camera side contact pins. Among them, 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 301 b of the lens side mount 301 at a position away from the lock hole portion 301 c. Therefore, the subsequent rotation of the lens side mount 301 with respect to the camera side mount 201 is permitted.

The engagement between the lens side bayonet claw 301a and the camera side bayonet claw 201a is from the mount contact state of (2) through the intermediate rotation states of (3) to (7) to the coupling completion state of (8) Complete. During this time, the lens-side contact base 302, while sliding with respect to the camera-side contact pin 202a ₁ ~202a _9, the second camera-side contact pin 202a ₂ ~202a ₉ also pushed to the camera-side contact base 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, since the lock pin 205 and the lock hole portion 301 c in the mounting circumferential direction have the same position in the mounting circumferential state in the coupling completed state, the lock pin 205 protruding from the mount reference surface 201 b of the camera side mount 201 corresponds to that of the lens side mount 301. It is inserted into the lock hole 301c. Thus, the coupling complete state is maintained until the lock pin 205 is pulled out of the lock hole portion 301c by the lock release 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 completely 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 location and 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 Let} La _n (La _{1 to} La ₉ ) be the distance between the tip and the tip. 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
Are set to have the following relationship.

This relationship can be rephrased as follows, for example, focusing on the lens side contact patterns 302a ₁ and 302a ₉ and the camera side contact pins 202a ₁ and 202a ₉ . The contact between the camera-side contact pin 202a ₉ in an intermediate rotational state of the camera-side contact pin 202a ₁ and the position of the part to start contact with the lens-side contact pattern 302a ₉ in an intermediate rotational state of the lens-side contact pattern 302a ₁ The distance in the mount circumferential direction between the position of the start portion and the position of the start portion is L _A. The “contact initiation portion” means, for example, the side of the rectangular contact pattern 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 referred to as 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 (3) of FIG. 5, first, as shown in FIG. 6A, the camera side contact pin (pin for DTEF terminal) 202a ₁ and the lens side contact pattern (DTEF) The 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 FIG. 6 (A) further lens side mount 301 from the state of being rotated, as shown in FIG. 6 (B) (in FIG. 5 (5)), a camera-side contact pin 202a ₂ ~202a ₆ and 202a ₈ a lens-side contact pattern 302a ₂ ~302a ₆ and 302a ₈ starts contacted simultaneously. At this time, the camera side contact pins 202a _{7 and} 202a ₉ and the lens side contact patterns 302a _{7 and} 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) ((6) in FIG. 5), the camera side contact pin (pin for MIF terminal) 202a ₉ and The contact with the lens side contact pattern (pattern for MIF terminal) 302a ₉ starts. At this time,
La ₉ > La ₇
Is therefore, the camera-side contact pin 202a ₇ and the lens-side contact pattern 302a ₇ not in contact with.

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

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

As described above, in this embodiment, the order of contact between the camera contact pin and the lens contact pattern is in the order of increasing distance La _n , and the camera contact pin 202a ₁ constituting the DTEF terminal and the corresponding lens side The contact pattern 302a1 _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.} In this case, the width in the circumferential direction of the lens-side contact patterns 302a _1, part opposite the part to start contact with the camera-side contact pin may be enlarged for (right direction in FIG. 6). When L _A and L _B are the same, when the lens side mount 301 is rotated from the state of (3) in FIG. 5, the camera side contact pins 202 a ₁ , 202 a ₉ for the DTEF terminal and the MIF terminal and the corresponding The lens side contact patterns 302a ₁ and 202a ₉ respectively start contact simultaneously.

Next, a description first issues camera side contact pins 202a ₁ and how to solve them. When the lens side mount 301 vigorously abuts against the camera side mount 201 when reaching the mount abutting state from the mount abutting state, the lens side contact seat 302 is against the first camera side contact pin 202a ₁ Clash hard. The first camera-side contact pin 202a ₁ is movable in the pin holding hole portion of the camera-side contact base 202 (i.e. a fitting play that allows movement) is inserted. Therefore, due to the impact due to the collision, the first camera side contact pin 202a ₁ is deformed by being inclined or bent according to the amount of fitting rattle with the pin holding hole from the position where the first camera contact pin 202a ₁ extends substantially straight in the optical axis direction. There is a risk of In this case, even if the binding completion state, the first camera-side contact pin 202a ₁ and the lens-side contact pattern 302a ₁ which forms a pair therewith is not properly contacted, Ya communication error between the camera and the interchangeable lens , May cause a power supply short.

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.
<< On the Width and Height of the Lens Contact Pattern (Accessory Contact Surface) >>
Forming a respective pair of the second camera-side contact pin 202a ₂ ~202a ₉ (hereinafter, also referred to as the pin "corresponding to") the lens-side contact pattern 302a ₂ ~302a _9, below, the second lens side contact It is called a pattern (second accessory side contact surface). Lens side contact pattern 302a ₉ for MIF terminal corresponds to a particular second accessory side contact surface. These width of the second lens side contact pattern 302a ₂ ~302a _9, as shown in FIG. 7 (A) and FIG. 8 (A), the is set to L1. 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.}

Width L1, as shown in FIG. 8 (A), the second camera-side contact pins 202a _x to the optical axis direction undeformed extend substantially straight contact with the second lens side contact pattern 302a _x The predetermined margin is set larger than the diameter V of the range W. 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, (corresponding to) form a first camera-side contact pin 202a ₁ pair for DTEF terminals lens side contact pattern 302a _1, below, the first lens side contact pattern (first accessory side contact surface) It is said. The width of the _first lens side contact pattern 302a1 is set to L2, which is larger than L1, as shown in FIGS. 7B and 8B. In FIGS. 7B and 8B, the first camera side contact pin is indicated by 202a _y , and the first and second camera side contact pins adjacent to each other are indicated by 202a _y and 202a _{y + 1} . Further, a first lens side contact pattern corresponding to the first camera side contact pin 202a _y is indicated by 302a _y , and first and second lens side contact patterns adjacent to each other are indicated by 302 a _y and 302 a _{y + 1} .

FIG. 8B shows the first camera-side contact pin 202a _y whose tip is displaced by tilting or deforming from the original state extending substantially straight in the optical axis direction. As shown in the figure, the width L2 is a range in which the first camera side contact pin 202a _y whose tip is displaced can come into contact with the first lens side contact pattern 302a _y (hereinafter, also referred to as a contact assumed range). ) The predetermined margin is set larger than the diameter VV of WW. The assumed contact range WW is a range corresponding to the amount by which the tip of the first camera-side contact pin assumed in design can be displaced, and for example, the first camera-side contact pin 202a _y beyond the assumed contact range WW. When the tip is displaced, it is a range that is determined as failure or abnormality.

The tip of the first camera side contact pin 202a _y is also worn away by repeated sliding with respect to the lens side contact pattern at the time of lens attachment / removal. For this reason, the range (the assumed contact range) WW in which the first camera side contact pin 202a _y can contact the first lens side contact pattern 302a _y is also set in consideration of the wear. VV is the width of the portion contacting with the first lens-side contact pattern 302a _y of the distal end of the first camera-side contact pin 202a _y (diameter).

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

  7 (A) and 7 (B), the pin contact position is shown as a schematic view at the approximate center of the radial and circumferential directions of the lens side contact pattern, but the pin contact position is in the radial direction and It does not have to be the center in the circumferential direction. In the present embodiment, as shown in FIG. 6E, each pin contact position is at a position deviated from the center in the radial direction of the lens side contact pattern.

As described above, in the present embodiment, the width of the first lens side contact pattern 302a _y corresponding to the first camera side contact pin 202a _y that may cause inclination or deformation is not affected by the second camera side contact pin It is set larger than the width of the second lens side contact pattern 302a _x corresponding to 202a _x. As a result, even if the first camera side contact pins 202a _x (202a ₁ ) are inclined or deformed due to the contact (collision) of the lens side contact seat 302, these and the first lens side contact patterns 302a _x (302a) ₁ ) It is possible to ensure normal contact (electrical connection). Therefore, it is possible to avoid the occurrence of a communication error between the camera and the interchangeable lens and a power short.

In FIG. 3B, the widths L1 and L2 are shown as angle ranges θ _L1 and θ _L2 on the lens side contact seat 302 formed in the arc shape on the lens side mount 301.
<< Pitch and distance between lens side contact patterns (between accessory side contact surfaces) and pitch between camera side contact pins >>
The second lens side contact pattern _{302a x, 302a x + 1 (} 302a 2 ~302a 9) each pitch and the spacing between, as shown in FIG. 7 (A) and FIG. 8 (A), the set to P1 and Q1 There is. The pitch of the lens side contact pattern in this case corresponds to the distance between the pin contact positions on the adjacent contact patterns. Further, the distance between the lens side contact patterns is a distance between one lens side contact pattern in the mount circumferential direction and the lens side contact pattern adjacent thereto (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 patterns and the camera side contact pins. The second lens side contact pattern 302a _x, in accordance with the pitch P1 of 302a _{x + 1,} a second camera-side contact pin 202a _x, (the distance between the pin center axis) pitch between 202a _{x + 1} be set to P1 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 condition 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 side contact patterns 302a _x, not simultaneously contact 302a _{x + 1.} That is, the interval Q1 is set larger than the width V of the contact range W (Q1> V).

As a second condition, one second lens-side contact pattern 302a _{x + 1} is a second camera-side contact pins 202a _x adjacent to each other, it does not contact the 202a _{x + 1} at the same time.

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 third condition from the first, second lens side contact pattern 302a _x adjacent, 302a _{x + 1} and the adjacent second camera-side contact pin 202a _x, 202a _{x + 1} power supply short circuit or the like to conduct simultaneously Can be avoided.

On the other hand, the pitch and interval between the first lens side contact pattern 302a _y (302a ₁ ) and the second lens side contact pattern 302a _{y +1} (302a ₂ ) are shown in FIG. 7 (B) and FIG. 8 (B) respectively. Thus, P2 and Q2 are set larger than P1 and Q1. According to the pitch P2 between the first and second lens side contact patterns 302a _y , 302a _{y + 1} , the pitch between the first and second camera side contact pins 202a _y 202a _{y + 1} (the distance between the pin central axes) It is set to P2.

In the determination of the pitch P2 and the spacing Q2, first, the range (contact assumed range) which can be in contact with the first lens side contact pattern 302a _y of the first camera side contact pin 202a _y is WW larger than W It assumes. In addition, it is also premised that the width of the first lens side contact pattern 302a _y becomes L2 larger than L1. The pitch P2 and the interval Q2 are determined to satisfy the following conditions.

As a first condition, as shown in FIG. 9B, while the interchangeable lens is rotating at the time of lens attachment / detachment, the first and second lens sides where the first camera side contact pin 202a _y is adjacent to each other Do not simultaneously contact the contact patterns 302 a _y and 302 a _{y + 1} . That is, the interval Q2 is set larger than the width VV of the assumed contact range WW (Q2> VV). Note that P2> VV.

FIG. 9C shows the case where the pitch and interval between the first and second lens side contact patterns 302a _y and 302a _{y + 1} adjacent to each other are set to P1 and Q1. In this case, the first camera side contact pin 202a _y comes into contact with the first and second lens side contact patterns 302a _y and 302a _{y + 1} simultaneously.

As described above, the camera-side contact pin 202a ₁ is tilt or deformation may occur by the contact of the lens-side contact base 302 (collision). Here, the first lens side contact pattern 302a ₁ camera side contact pin 202a ₁ on the second lens side contact pattern DGND terminal pattern 302a ₂ adjacent thereto and for DTEF terminal pattern is simultaneously contacts, the following Problems occur. As described above, the camera microcomputer 20 determines the type of the interchangeable lens 100 mounted based on the voltage value of the DTEF_IN terminal. If the camera-side contact pin 202a ₁ for DTEF terminal pattern and DGND terminal pattern simultaneously contacts, ready for the pattern for DTEF terminal pattern and DGND terminal is conductive, the camera microcomputer 20 erroneously kind of lens is determined There is a fear. 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 of the type different from the actually mounted interchangeable lens, an appropriate communication voltage is not set, It will not be possible to communicate properly. Therefore, in this embodiment, in consideration of the inclination and deformation camera side contact pin 202a _1, a first lens side contact pattern 302a _1, and the space between it and the second lens side pattern 302a ₂ adjacent thereto There is.

As a second condition, one first lens side contact pattern 302a _{y + 1} does not simultaneously contact the adjacent first and second camera side contact pins 202a _y and 202a _{y + 1} .

Then, as a third condition, even if the distance between them is narrowed due to the positional error of the first lens side contact pattern 302 a _y , the first and second conditions should be satisfied.

By satisfying the first to third conditions, the adjacent first and second lens side contact patterns 302a _y and 302a _{y + 1} and the adjacent first and second camera side contact pins 202a _y and 202a _{y + 1} are simultaneously processed. It is possible to prevent the occurrence of a problem such as a short circuit or the like due to conduction.

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

Essentially, in consideration of the amount of rotation at the time of bayonet coupling, it is preferable to make the pitch between the camera side contact pins as small as possible within the range in which the above-mentioned short circuit does not occur. However, the second camera-side contact pins 202a pitch between ₂ adjacent thereto and the first camera-side contact pin 202a _1, as described above, contact (collision) of the lens-side contact base 302 by a first inclination and deformation camera side contact pin 202a ₁ it is necessary to consider that occurs. Therefore, in this embodiment, the second pitch between the camera-side contact pin 202a ₂ adjacent thereto and the first camera-side contact pin 202a _1, is widened than the pitch between other second camera-side contact pin .

In the present 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, the pitch and interval between the first lens side contact pattern 302a _y and the other first lens side contact pattern 302a _{y + 1} adjacent thereto are also set to P2 and Q2, respectively. 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 the interval between the first and second lens contact patterns adjacent to each other may not necessarily be the same as the pitch and the interval between the two first lens contact patterns 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 (however, Q1 <Q2a)
It may be In this case, the pitch between the first lens contact patterns adjacent to each other and the pitch between the first and second camera contact pins adjacent to each other are set to P2a and P2b, respectively.

As described above, in the present embodiment, the first and second lens side contact patterns and the first and second camera side contact pins which satisfy the following conditions (1) to (3) are used. As described above, P2 and Q2 include P2a, P2b, Q2a, and Q2b described above.
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 first camera side contact pin is inclined or deformed due to the lens side contact seat coming into strong contact with the first camera side contact pin, the first camera side contact pin contacts with the first camera side contact pin. A proper contact (electrical connection) with the first lens side contact pattern can be secured. Therefore, it is possible to prevent the occurrence of a communication error between the camera and the interchangeable lens due to the fact that such a normal contact is not made, and the occurrence of a failure of the camera or the interchangeable lens due to a short circuit.

Furthermore, it is desirable to satisfy the fourth condition that the distance L _A is smaller than or the same as the distance L _B as the operation (or control) condition when the interchangeable lens is attached to the camera. That is, it is desirable that at least one of the width L2, the pitch P2, and the interval Q2 be set so that the DTEF terminal is connected earlier than or simultaneously with the MIF terminal.
<< About the diameter of the camera contact pin >>
As described above, the first camera side contact pin 202a _y (202a ₁ ) may be deformed, for example, bent by strongly colliding with the lens side contact seat 302 in the mount contact state. Such a modification is, as shown in FIGS. 12A and 12B, of the diameter φD2 of the first camera side contact pin 202a _y of the second camera side contact pin 202a _{y + 1} (202a _{2 to} 202a ₉ ). This can be suppressed by increasing the rigidity of the _first camera side contact pin 202a1 by making the diameter larger than the diameter 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 to satisfy the following condition (4).
φD1 <φD2 (4)
As a result, communication errors and power supply shorts caused by deformation of the first camera side contact pin 202a _y can be made more difficult to occur.

  The conditions (1) to (4) described above may not necessarily 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, the normal contact between the first camera contact pin and the first lens contact pattern which has been tilted or deformed is secured. It is possible. Then, if the condition (3) is satisfied, the above-mentioned problem of the power supply short can be avoided.

Moreover, by satisfying the above condition that the distance L _A is smaller than the distance L _B (L _B is larger than L _A ) or the same, communication appropriate for the type of interchangeable lens mounted on the camera is performed. 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 the improper setting of the communication voltage.

  FIGS. 16, 17 and 18 show the configuration of the camera side mount 201 using a 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 (the direction facing the camera side mount). FIG. 17 shows the internal configuration of the camera 10 as viewed from the back. Further, FIG. 18 shows the camera side mount 201 in an exploded manner.

The configuration shown in FIGS. 16 to 18 is basically the same as the configuration shown in FIGS. 2 to 4, and the members in common with the members shown in FIGS. The same reference numerals as in 4 are attached to substitute for the explanation. However, in FIGS. 16 to 18, the camera side mount 201, in particular, a ring-shaped member having a mount reference plane 201b and the camera-side bayonet claws 201a ₁ ~201a ₃ (shown in FIG. 2 (A) in 201a) It is referred to as a mold mount 201A. The mold mount 201A is formed by molding using a resin such as glass fiber-filled polycarbonate.

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

Further, in FIG. 18 is used in place of the contact spring 202b ₁ ~202b ₉ as a coil spring shown in FIG. 4 shows the contact spring 220 as leaf spring. Further, in FIG. 18, the base end portion of the camera-side contact pin 202a ₁ ~202a ₉ is nine wires of the flexible printed circuit board 221 which is used in place of the flexible printed wiring board 206 shown in FIG. 4 the tip , And are electrically connected.

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

The flexible printed wiring board 221 is formed with a hole 221 c through which a fastening screw 204 a at a lowermost position described later passes. A first lead portion 221a and a second lead portion 221b are provided on both sides of the hole 221c in the mount circumferential direction. The first lead portions 221a, 6 wires of the camera-side contact pin 202a ₄ ~202a ₉ is provided. The second lead portions 221b, 3 wires of camera-side contact pin 202a ₁ ~202a ₃ is provided.

Contact spring 220 is disposed between the camera side mount 201 (the mounting base plate 208) and the camera body 209, the camera-side contact base camera side contact pin 202a ₁ ~202a ₉ by the respective spring arm portions of the nine It biases in the direction which protrudes from 202. The contact spring 220 is also formed with a hole 220c through which the lowermost fastening screw 204a passes. 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 A department and is provided.

As described above, by using the mold mount 201A manufactured by resin molding for the camera side mount 201, the strength may be insufficient compared to 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 largest external force to the pawl 201a _2.

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

Designated by 204a to 204f are fastening screws for fixing the mold mount 201A to the camera main body 209 shown in FIG. 18, and are arranged at six places in the circumferential direction of the mold mount 201A at equal intervals. Among these six fastening screws 204a to 20f, the fastening screw 204a is arranged such that its center is located at the lowermost position in the mold mount 201A. As described above, since the camera side bayonet claw 201a ₂ and the fastening screw 204a are disposed at the lowermost position where the largest external force acts when the camera 10 with the interchangeable lens 100 attached thereto falls, it is Sufficient strength can be secured.

  The mold mount 201A is formed with a hole through which the lock pin 205 can pass, and the lock pin 205 protrudes or retracts from the mold mount 201A through the hole.

  In addition, a shutter unit 226 is disposed inside the camera 10. The shutter unit 226 has a shutter curtain (not shown) which is charged to a closed state by the rotation operation of a shutter charge motor 226a which is a camera-side actuator. The shutter curtain moves in the opening direction with respect to the shutter opening 226b by releasing the charge, and then moves while being charged again in the closing direction, thereby controlling the exposure amount of the image sensor 11 shown in FIG. 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 a front view shown in FIG.

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

The camera-side contact base 202, as is also shown in FIG. 2 (A) and FIG. 3 (A), the camera-side contact pin 202a ₁ ~202a ₉ is disposed in the mount circumferential direction.

In FIG. 18, reference numeral 222 denotes a mount spring, and spring piece portions 222 a ₁ , 222 a ₂ and 222 a ₃ are provided at three locations in the circumferential direction. Spring piece portion 222a ₁ ~222a _3, respectively, draw the camera-side bayonet claws 201a ₁ ~201a ₃ to the engaged lens side bayonet claw 301a (see FIG. 2 (B)) to the camera body 209 side.

A static pressure receiver 201 d is provided on the back side of the camera side bayonet claws 201 a _{1 to} 201 a ₃ . Static pressure receiving portion 201d, the camera body 209 side in contact with the lens-side bayonet claws 301a when a load of a predetermined value or more to the opposite side acts on the mounting spring 222 (spring piece portion 222a ₁ ~222a _3), It has a function of holding the interchangeable lens without using the mount spring 222. In the camera-side bayonet claws 201a ₂ formed in an angular range including the lowermost position in the mold mounts 201A, static pressure receiving portion 203d is formed in a lowermost position.

In the camera side mount 201 configured as described above, the fastening screw 204a is disposed at the lowermost position of the mold mount 201A as described above. For this reason, the contact spring 220 is disposed between the camera side mount 201 (mount base plate 208) and the camera body 209 so as to avoid the fastening screw 204a. Specifically, nine spring arms of the contact spring 220 is, from both sides of the fastening screw 204a (camera side mount centerline B) of the mount circumferential direction, toward the camera side contact pin 202a ₁ ~202a ₉ Camera It is arranged to extend toward the side mount 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 uniform. Moreover, the camera-side contact pin 202a ₁ ~202a ₉ (flexible printed circuit board 221) and it is necessary to configure the contact unit as small as possible, including the contact spring 220. For this purpose, it is necessary to make the width, length and deformation of each of the nine spring arms of the contact spring 220 the same.

If the camera-side contact pin is provided at the lowermost position of the camera-side contact seat 202 directly above the fastening screw 204a and the nine spring arms of the contact spring 220 have the same width and length, It is necessary to increase the inclination of the spring arm extending from the side to the camera contact pin. As a result, the pitch of the camera-side contact pin 202a ₁ ~202a ₉ with a pitch of nine spring arms of the contact spring 220, will have to be widened beyond the conditions required for the pitch described above. And, thereby, the mount camera side contact pin 202a in the circumferential direction _{1 ~202a 9} occupied angular range (hereinafter, referred to as occupation angle range) increases.
Further, at the lowermost position of the camera side mount 201 which receives the maximum load when the camera 10 drops, the camera side disposed at the lowermost position in the camera side contact seat 202 even if it is firmly fixed by the fastening screw 204a. Maximum impact is applied to contact pins. In order to avoid problems such as bending or breakage of the camera side contact pin due to such an impact, it is better not to provide the camera side contact pin at the lowermost position of the camera side contact seat 202.

Therefore, in this embodiment, the camera-side contact pin 202a ₁ ~202a _9, of the position of the mount circumferential direction of the camera-side contact base 202 at a position other than the lowermost 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 pins 202a ₁ ~202a _9, to allow energization of the adequate and uniform protruding direction of the camera-side contact pins 202a ₁ ~202a _9, upon further camera fall Impact resistance can be improved.

  In FIG. 17, reference numeral 224 denotes a circuit board, and reference numeral 225 denotes a power supply circuit block provided on the circuit board 224. Also, 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 positive electrode 226 a, the negative electrode 226 b and the information terminal 226 c to supply power to the power supply circuit block 225.

  On the circuit board 224, a first connector 224 a is connected to the first lead portion 221 a of the flexible printed wiring board 221, and a second connector 224 b is connected to the second lead portion 221 b of the flexible printed wiring board 221. 2 connectors. Here, in the following description, in each of the camera side and lens side mounts, the side of the power supply circuit block 225 (one side of the mount center line (camera side and accessory side mount center line) extending in the gravity direction from the center of the mount Side is simply referred to as 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.

VBAT terminal pins 202a ₇ is a power supply contact pin of the camera-side contact pin 202a ₁ ~202a ₉ is arranged with a pin 202a ₆ for PGND pins to the power supply circuit side. In other words, the VBAT terminal pins 202a ₇ large currents, as compared with the case of arranging on the motor side, closer to the power supply circuit block 225. As a result, the loss due to the wiring resistance of the circuit board 224 and the flexible printed wiring board 221 when the current for supplying power flows from the power supply circuit block 225 to the VBAT terminal pin 202a ₇ can be suppressed.

Further, first lead portions 221 a connected to six camera side contact pins 202 a _{4 to} 202 a ₉ of the flexible printed wiring board 221 are disposed on the power supply circuit side. On the other hand, a second lead-out portion 221 b connected to _three camera side contact pins 202 a _{1 to} 202 a 3 of the flexible printed wiring board 221 is disposed on the motor side. That is, the number of the camera-side contact pin 202a ₄ ~202a ₉ arranged in the power supply circuit side is larger than the number of the camera-side contact pin 202a ₁ ~202a ₃ arranged on the motor side. This realizes a configuration that is less susceptible to the noise from the shutter charge motor 226a with respect to the exchange of signals between the camera 10 and the interchangeable lens 100, and the like.

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, the arrangement of the lens-side contact patterns 302a ₁ ~302a ₃ in the interchangeable lens 100 in a binding completion state to the camera 10 of the normal posture, the camera 10 is in the normal posture described with reference to FIGS. 16 to 18 pursuant to the arrangement of the camera-side contact pin 202a ₁ ~202a ₃ when.

That is, the lens-side contact pattern 302a ₁ ~302a _9, of the position of the mount circumferential direction of the lens-side contact base 302, most lowermost position where the lower in binding completion state when the camera 10 is in the normal posture ( It is placed at a position excluding the accessory side mount center line).

In addition, the interchangeable lens 100 in the coupling completion state with respect to the camera 10 in the normal posture is viewed from the direction facing the lens side mount. At this time, VBAT terminal pattern 302a ₇ power is supplied for contact surfaces of the lens-side contact patterns 302a ₁ ~302a _9, together with a PGND terminal pattern 302a _6, the power supply circuit side of the camera 10 (hereinafter, simply supply circuit side Is located in Furthermore, the number of the lens-side contact pattern 302a ₄ ~202a ₉ arranged in the power supply circuit side, the motor side of the camera 10 (hereinafter, simply referred to as the motor side) number of lens side contact pattern 302a ₁ ~302a ₃ disposed More than.

As described above, in this embodiment, the camera-side contact pin 202a ₁ ~202a ₉ and the lens-side contact pattern 302a ₁ ~302a ₉ when the camera 10 of the contact base 202, 302 in normal posture (and complete coupling state When it was on 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 contact pattern 302a ₇ for power supply of the camera and lens is disposed to the power supply circuit side, further the number of contacts disposed on the power supply circuit side, arranged on the motor side It was more than the number of contacts to be done. Thus, it is possible to realize a configuration in which the loss due to the wiring resistance is small and the resistance to noise is achieved.

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

FIGS. 11A to 11C show the case 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 pitch P2 and the interval P2 between the first and second lens-side contact patterns 302a _y and 302a _{y + 1} adjacent to each other are the pitch between the second lens-side contact patterns 302a _x and 302a _{x + 1} adjacent to each other. Greater than P1 and interval Q1. Further, the pitch P2 between the first and second camera side contact pins 202a _y and 202a _{y + 1} adjacent to each other is also larger than the pitch P1 between the second camera side contact pins 202a _x and 202a _{x + 1} adjacent to each other.

However, the width of the first lens-side contact pattern 302a _y is the same L1 as the width of the second lens-side contact pattern 302a _x (302a _{y + 1} ). However, L1 here is larger than L1 shown in the first embodiment, and the range (contact assumed range) WW where the first camera side contact pin 202a _y can contact the first lens side contact pattern 302a _y Is also slightly larger.

Further, the diameters of the first and second camera side contact pins 202a _y , 202a _{y + 1} (202a _x , 202a _{x + 1} ) are all the same φD1.

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

  In addition, even in the case other than 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 Normal contact with the lens side contact pattern can be secured. This can prevent the occurrence of communication errors 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.

  The embodiments described above are only representative examples, and various modifications and changes can be made to the embodiments when the present invention is implemented.

  It is possible to provide a camera accessory such as an interchangeable lens that can make a good electrical connection with the camera.

201 camera side mount 201a camera side bayonet claw 202 camera side contact seat 202a _n camera side contact pin 301 lens side mount 301a lens side bayonet claw 302 lens side contact seat 302a _n lens side contact pattern

Claims (23)

A camera accessory comprising an arc-shaped mount capable of mounting a camera having a power supply circuit and an actuator,
A plurality of contact surfaces arranged in a circumferential direction along the arc shape of the mount, wherein the plurality of contact surfaces are electrically connected to the camera in a state where the camera accessory is mounted on the camera A second contact surface used to receive power supply from the camera, a second contact surface used to communicate communication data between the camera accessory and the camera, and the second contact surface A third contact surface used to indicate the type of said camera accessory;
In the normal position of the camera in a state in which the camera accessory is mounted on the camera, the plurality of contact surfaces have the mount center line when a line extending in a gravity direction from a center of the mount portion is a mount center line. said power supply circuit is the said first contact surfaces on a first side of the second contact surface is positioned to be located, and the first side with respect to the mount center line a side opposite with respect to A camera accessory characterized in that the third contact surface is located on the second side where the actuator is located. The first contact surface and the second contact surface are closer to the power supply circuit than the actuator when the camera accessory is mounted on the camera.
The camera accessory according to claim 1, wherein the third contact surface is closer to the actuator than the power supply circuit when the camera accessory is mounted on the camera. The plurality of contact surfaces are characterized in that the number of contact surfaces disposed on the first side is larger than the second side with respect to the mount center line in the circumferential direction of the mount portion. The camera accessory according to claim 2. The plurality of contact surfaces further include a fourth contact surface used to indicate attachment of the camera accessory to the camera with the camera accessory attached to the camera;
The fourth contact surface is located on the side of the mount center line with the camera accessory attached to the camera, and the distance to the power supply circuit is shorter than that of the actuator. The camera accessory according to claim 2 or 3, characterized in that   The fourth contact surface is disposed adjacent to the first contact surface on the side opposite to the second contact surface across the first contact surface in the circumferential direction of the mount portion. A camera accessory according to claim 4, characterized in that: The plurality of contact surfaces further include a fifth contact surface used to receive a clock signal for communication from the camera when the camera accessory is mounted on the camera,
The fifth contact surface is located on the side of 2 with respect to the mount center line when the camera accessory is mounted on the camera, and the distance to the actuator is shorter than the power supply circuit. The camera accessory according to any one of claims 2 to 5, wherein   7. The camera according to claim 6, wherein the fifth contact surface is provided between the second contact surface and the third contact surface in the circumferential direction of the mount portion. accessory. The camera accessory according to claim 6, wherein the mount center line is located between the second contact surface and the fifth contact surface. The plurality of contact surfaces are used as contact surfaces used to receive power supply from the camera when the camera accessory is mounted on the camera, and a sixth contact surface different from the first contact surface is used as the contact surface. In addition,
The first contact surface is a contact surface used to receive a supply of power from the camera for driving a motor incorporated in the camera accessory.
The sixth contact surface is a contact surface that receives supply of power for communication control between the camera accessory and the camera from the camera, and is positioned on the first side with respect to the mount center line. The camera accessory according to any one of claims 6 to 8, characterized by: The plurality of contact surfaces are a seventh contact surface for showing a potential for ground corresponding to the first contact surface, and an eighth for showing a potential for ground corresponding to the sixth contact surface. Further including the contact surface of the
The seventh contact surface is located on the first side with respect to the mount center line,
The camera accessory according to claim 9, wherein the eighth contact surface is located on the second side with respect to the center of the mount. The third contact surface is characterized in that the voltage level indicated by the third contact surface when the camera accessory is mounted to the camera differs depending on the type of the camera accessory. 10. The camera accessory according to any one of 10 . A camera provided with an arc-shaped first mount portion to which a camera accessory can be attached,
Power supply circuit,
An actuator,
And a plurality of contact pins circumferentially arranged along the arc shape of the first mount portion,
In the case where the line extending in the direction of gravity from the center of the mount portion at the normal position of the camera is taken as the mount center line,
The plurality of contact pins can be electrically connected to the camera accessory when the camera accessory is attached to the camera, and the first contact pins used to supply power to the camera accessory A second contact pin used to communicate communication data between the camera and the camera accessory, and a third contact pin used to indicate the type of the camera accessory mounted in the camera with the camera accessory mounted on the camera Contact pins, and
The plurality of contact pins are the first contact pin and the second contact pin on the first side on which the power supply circuit is located with respect to the mount center line in a state where the camera accessory is attached to the camera. And the third contact pin is positioned on a second side opposite to the first side with respect to the mount center line and on which the actuator is positioned. The first contact pin and the second contact pin are located on a first side where the power supply circuit is located, and the distance to the power supply circuit is shorter than that of the actuator.
The third contact pin, said actuator second of the on the side third contact pin is positioned to the position, the close distance to the actuator than the power supply circuit, it in claim 12, wherein Camera described. The plurality of contact pins have a larger number of contact pins disposed on the first side than the second side with respect to the mount center line in the circumferential direction of the first mount portion. The camera according to claim 13 , characterized in that: The plurality of contact pins further include a fourth contact pin used to indicate that the camera accessory is attached to the camera when the camera accessory is attached to the camera.
The camera according to claim 13 or 14 , wherein the fourth contact pin is located on the side of the one with respect to the mount center line, and the distance to the power supply circuit is shorter than the actuator. . The fourth contact pin is disposed adjacent to the first contact pin on the side opposite to the second contact pin across the first contact pin in the circumferential direction of the first mount portion. The camera according to claim 15 , characterized in that The plurality of contact pins further include a fifth contact pin used to transmit a clock signal for communication to the camera accessory when the camera accessory is attached to the camera.
The fifth contact pin of the mounting center line located on the side of the 2 relative to the close distance to the actuator than the power supply circuit, according to claim 13 or 16 any one of, wherein the The camera described in the section. The fifth contact pin, in the circumferential direction of the first mounting portion, according to claim 17, characterized in that provided between the second contact pin and the third contact pin camera. The camera according to claim 17 or 18, wherein the mount center line is located between the second contact pin and the fifth contact pin. The plurality of contact pins further include a sixth contact pin different from the first contact pin as a contact pin used to supply power to the camera accessory,
The first contact pin is a contact pin used to supply the camera accessory with a power source for driving a motor incorporated in the camera accessory.
The sixth contact pin is a contact pin used only to supply power for communication control between the camera and the camera accessory to the camera accessory, and is positioned on the first side with respect to the mount center line 20. A camera according to any of the claims 17-19, characterized in that: The plurality of contact pins are a seventh contact pin for indicating a potential for ground corresponding to the first contact pin, and an eighth for indicating a potential for ground corresponding to the sixth contact pin. Further including a contact pin,
The seventh contact pin is located on the first side with respect to the mount center line,
The camera according to claim 20, wherein the eighth contact pin is located on the second side with respect to the mount center. The third contact pin, when the camera accessory to the camera is mounted, or claim 13 the third contact pin voltage level indicated are different from each other depending on the type of the camera accessory 21. The camera according to any one of 21 . The first mount portion is coupled to the second mount portion by rotating relative to the second mount portion from a first state in which the second mount portion of the camera accessory is removable. In the second state, the camera accessory is mounted on the camera, and the third contact pin corresponds to the plurality of contact pins provided on the second mount in the first state. An abutment pin that abuts on any of multiple contact surfaces,
The first contact pin and the second contact pin include non-abutting pins that do not abut on any of the plurality of contact faces provided in the second mount in the first state,
In the relative rotational direction of the first mount portion and the second mount, a pitch between the contact pin and the non-contact pin adjacent thereto is a pitch between the non-contact pins adjacent to each other The pitch between the contact pins adjacent to each other among the plurality of contact pins larger than or larger than the pitch between the non-contact pins is set to any one of claims 13 to 22 . The camera according to one of the items.