JP2014013331A - Camera accessory and camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent contact failure of an accessory type determination contact provided on a mount.SOLUTION: An accessory-side mount 301 rotates relative to a camera-side mount 201 from a first state in which the accessory-side bayonet pawl 301a is inserted between the camera-side bayonet pawls 201a, and comes into a second state in which connection with the camera-side mount is completed. The first accessory-side contact face 303aand first camera-side contact pin 203aprovided on both the mounts come into contact with each other. Thereby, a signal used, in the camera, for the determination of the type of the camera accessory attached to the camera is input from the camera accessory to the camera. A first accessory-side contact face is arranged within an angle range where the accessory-side bayonet pawl is provided, which is an angle range θin the relative rotation direction of the accessory-side mount.

Description

  The present invention relates to a camera and a camera accessory such as an interchangeable lens attached to the camera in an interchangeable manner.

  A camera accessory (hereinafter simply referred to as an accessory) receives power from the camera and communicates commands and data with the camera while being attached to the camera. In order to enable such power supply and communication, a mounting portion (mount) for the camera and the accessory is provided with a plurality of contacts that are electrically connected by being in contact with each other. Further, in many cases, the bayonet coupling method is employed for mounting (coupling) the camera and the accessory by relatively rotating their mounts to engage the bayonet claws provided on each mount.

In these cameras and accessories, a signal used by the camera to determine the type of accessory attached to the camera is a contact from the accessory and one of the plurality of contacts (hereinafter referred to as an accessory type determination contact). May be input to the camera via In this case, the camera switches, for example, a voltage of a signal used for communication between the camera and the accessory and a communication method according to the determined accessory type.
In the camera and the interchangeable lens disclosed in Patent Document 1, a pair of locking claws provided on each bayonet mount and engaged with each other, and a power supply terminal for the interchangeable lens from the camera located inside the mount, Are arranged at positions overlapping in the radial direction of the mount. With this configuration, it is avoided that the power supply terminal portion is displaced due to an external force applied to the interchangeable lens, and the power supply from the camera to the interchangeable lens is not performed due to poor contact of the power supply terminal.

Japanese Unexamined Patent Publication No. 09-212645

  However, the camera and the interchangeable lens mount disclosed in Patent Document 1 are not originally provided with accessory type determination contacts.

  When a contact failure occurs in the accessory type determination contact, the camera erroneously determines the accessory type, and as a result, sets an inappropriate communication voltage for the installed accessory, resulting in an accessory malfunction. There is a fear.

  The present invention provides a camera accessory and a camera that can prevent contact failure of an accessory type determination contact provided on a mount.

  A camera accessory according to one aspect of the present invention includes an accessory-side mount that is detachably coupled to a camera-side mount provided on the camera. The accessory-side mount has a plurality of accessory-side bayonet claws, and the accessory-side bayonet claws are relative to the camera-side mount from the first state in which the accessory-side bayonet claws are inserted between the plurality of camera-side bayonet claws provided on the camera-side mount. By rotating, the accessory-side bayonet claw and the camera-side bayonet claw are engaged with each other to be in a second state in which the coupling with the camera-side mount is completed. The accessory side contact holding part provided on the accessory side mount holds a plurality of accessory side contact surfaces arranged in the relative rotation direction of the accessory side and the camera side mount. The camera side contact holding part provided in the camera side mount holds a plurality of camera side contact pins arranged in the relative rotation direction. In the second state, the plurality of accessory side contact surfaces and the plurality of camera side contact pins come into contact with each other to electrically connect the camera accessory and the camera, and the first accessory side of the plurality of accessory side contact surfaces When the contact surface and the first camera-side contact pin among the plurality of camera-side contact pins are in contact with each other, a signal used to determine the type of the camera accessory attached to the camera in the camera is transmitted from the camera accessory. Input to the camera. The first accessory-side contact surface is arranged in an angle range in the relative rotation direction of the accessory-side mount and in an angle range in which the accessory-side bayonet claw is provided.

  A camera according to another aspect of the present invention includes a camera-side mount to which an accessory-side mount provided on the camera accessory is detachably coupled. The camera side mount has a plurality of camera side bayonet claws, and is relative to the accessory side mount from the first state in which the accessory side bayonet claws provided on the accessory side mount are inserted between the plurality of camera side bayonet claws. By rotating, the camera-side bayonet claw and the accessory-side bayonet claw are engaged with each other, and the second state is completed in which the connection with the accessory-side mount is completed. The accessory side contact holding part provided on the accessory side mount holds a plurality of accessory side contact surfaces arranged in the relative rotation direction of the accessory side and the camera side mount. The camera-side contact holding portion provided in the camera-side mount holds a plurality of camera-side contact pins arranged in the relative rotation direction so as to be movable in the protruding and retracting direction. In the second state, the plurality of camera side contact pins and the plurality of accessory side contact surfaces come into contact with each other to electrically connect the camera and the camera accessory, and the first camera side of the plurality of camera side contact pins When the contact pin and the first accessory side contact surface of the plurality of accessory side contact surfaces come into contact with each other, a signal used to determine the type of camera accessory attached to the camera in the camera is transmitted from the camera accessory. Input to the camera. The first camera side contact pin is disposed within an angle range in a relative rotation direction of the camera side mount and provided with a camera side bayonet claw.

  In the present invention, the first accessory side contact surface and the first camera side contact pin used as the accessory type determination contact respectively on the accessory side mount and the camera side mount, and the angle at which the bayonet claw in each mount is provided Arranged within the range. For this reason, according to the present invention, even when an external force is applied to the accessory, it is possible to prevent the first accessory side contact surface and the first camera side contact pin from being in a poor contact state due to the engagement of the bayonet claws. The camera can make the correct accessory type determination.

1 is a block diagram illustrating an electrical configuration of an interchangeable lens that is Embodiment 1 of the present invention and a camera to which the interchangeable lens is mounted. FIG. FIG. 3 is a diagram illustrating a 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. 4 is a diagram illustrating a state of contact of the connector in a process of coupling a mount provided on the interchangeable lens of Example 1 and the camera. The enlarged view of (4)-(8) in FIG. FIG. 3 is a diagram showing a lens side contact pattern in Embodiment 1. FIG. 3 is a diagram illustrating camera side contact pins in a coupling completed state according to the first embodiment. FIG. 5 is a diagram illustrating camera side contact pins in an intermediate rotation state of the mount in Embodiment 1; FIG. 6 is a diagram illustrating camera side contact pins in a modification of the first embodiment. The figure which shows the lens side contact pattern and camera side contact pin in Example 2 of this invention. FIG. 6 is a diagram illustrating camera side contact pins in another modification of the first embodiment. FIG. 3 is a block diagram illustrating a connection between a lens type determination unit of the first and second interchangeable lenses and a camera microcomputer in Embodiment 1. FIG. 3 is a block diagram illustrating a configuration of a voltage conversion unit in the first embodiment. 4 is a timing chart illustrating an example of input / output timing of the camera microcomputer according to the first exemplary embodiment. The figure which shows the arrangement | positioning relationship between the bayonet nail | claw and signal terminal in Example 1. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1A shows a camera system including an interchangeable lens 100 as a camera accessory that is Embodiment 1 of the present invention, and a camera 10 to which the interchangeable lens 100 is detachably mounted. Each of the camera 10 and the interchangeable lens 100 has a mount 1 having an electrical contact for supplying power to the interchangeable lens 100 from the camera 10 and communicating with each other. In this embodiment, an interchangeable lens will be described as a camera accessory that can be attached to the camera, but camera accessories other than the interchangeable lens are also included as other embodiments of the present invention.

  The camera 10 includes an image sensor (imaging device) 11 that photoelectrically converts a subject image as an optical image formed by the photographing lens 101 in the interchangeable lens 100 and outputs an electrical 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, an image processor 13 that performs various image processing on the digital signal, and generates 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.

  Further, the camera 10 functions as a buffer when performing processing on the 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 photographing switch for starting recording of a video signal, a selection / setting switch for setting various menus, and the like. The camera control unit 18 includes a microcomputer, and controls the image processing unit 13 according to a signal from the operation input unit 17 and controls communication with the interchangeable lens 100.

  On the other hand, the interchangeable lens 100 includes a lens driving unit 102 that drives an actuator (not shown) included in the photographing lens 101 that moves or operates a focus lens, a zoom lens, a diaphragm, and an image stabilization 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 through communication.

  FIG. 1B shows terminals provided on the mount 1 for electrical connection between 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 terminal (1-5) is a terminal for detecting the type of the interchangeable lens 100 attached to the camera 10. The camera microcomputer 20 detects (determines) the type of the interchangeable lens 100 attached to the camera 10 based on the voltage at the DTEF terminal. That is, the voltage at the DTEF terminal corresponds to a signal used for determining (in other words, identifying) the type of the camera accessory (interchangeable lens 100) attached to the camera 10 in the camera 10.

  The VBAT terminal (1-6) is a terminal for supplying a driving power source (VM) used for various operations except for communication control from the camera 10 to the interchangeable lens 100. The VDD terminal (1-7) is a terminal that supplies a communication control power source (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 type of the interchangeable lens 100 that the camera 10 identifies based on the voltage of the DTEF terminal includes a first interchangeable lens and a second interchangeable lens having a communication voltage different from that of the first interchangeable lens. explain. The communication voltage will be described later.

  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 source (VDD) for the first and second interchangeable lenses and a communication voltage for the first interchangeable lens. The voltage V2 is a communication voltage of the second interchangeable lens. V3 is a voltage as an operation power source of the camera microcomputer 20. VM is a voltage as a power source for driving the first and second interchangeable lenses as described above. V1 and V2 are different from each other, but 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 supplying VDD and VM from the camera 10 to the interchangeable lens 100. When the power switch 22 is turned off, the camera microcomputer 20 stops supplying 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. The camera microcomputer 20 also has a MIF_IN terminal for detecting the mounting of the interchangeable lens 100, a DTEF_IN terminal for identifying the type of the interchangeable lens 100, and a CNT_V_OUT terminal that outputs a communication voltage switching signal to the voltage converter 23. And have. Further, the camera microcomputer 20 has a CNT_VDD_OUT terminal that outputs an energization signal of the power switch 22, a connection terminal for the image processing unit 13, and a connection terminal for the operation input unit 17. The operation of the voltage converter 23 will be described later.

  The lens power supply unit 214 converts VDD (V4) supplied from the camera 10 to the interchangeable lens 100 to a voltage V5. A microcomputer (hereinafter referred to as a lens microcomputer) 211 in the lens control unit 103 communicates with the camera microcomputer 20 via the voltage conversion unit 23 described above. The lens microcomputer 211 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 input of communication data from the camera 10, and a lens driving unit 102. And a connection terminal.

  The detection of attachment of the interchangeable lens 100 to the camera 10 will be described. Since the MIF_IN terminal of the camera microcomputer 20 is pulled up to the power supply by the resistor R2 (100 KΩ), it becomes H (High) when the lens is not attached. However, since the MIF_IN terminal is connected to GND in the interchangeable lens 100 when the interchangeable lens (first and second interchangeable lenses) 100 is mounted, the interchangeable lens 100 is mounted 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 includes a resistor RL provided between the DTEF terminal provided on the mount 1 and GND. The resistance value of the resistor 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 0Ω, and the resistance RL provided in the second interchangeable lens shown in FIG. 13B is 300 KΩ.

  In the camera 10, a resistor R 1 (for example, 100 KΩ) is connected between the DTEF terminal of the mount 1 and the operating power supply voltage (V 3) of the camera microcomputer 20, and the DTEF terminal is connected to the DTEF_IN terminal of the camera microcomputer 20. Is 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 the interchangeable lens type determination by the camera microcomputer 20 will be described. The camera microcomputer 20 determines the type of the mounted interchangeable lens according to the voltage value input to the DTEF_IN terminal. Specifically, the camera microcomputer 20 performs an A / D conversion on the input voltage value, and compares the AD conversion value with a lens type determination criterion that the camera microcomputer 20 has in advance to perform the lens type determination.

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

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

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

  The level shifters 52, 53, and 54 have a function of converting a signal input to the SIN terminal from a voltage at the VIN terminal to a voltage at 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. Furthermore, the VIN terminal is connected the same V3 and operating power supply voltage of the camera microcomputer 20, the VOUT pin V _S output from the voltage selector 51 is connected. The SIN terminal of the level shifter 53 is connected to the DCL_OUT terminal of the camera microcomputer 20, the SOUT terminal is connected to the DCL terminal of the mount 1, and the VIN terminal is connected to the same V 3 as the operation power supply voltage of the camera microcomputer 20. The VOUT terminal, the _{V S} that is output from the voltage selector 51 is connected. The SIN terminal of the level shifter 54 DLC terminal mount 1 is connected, DLC_IN terminal of the camera microcomputer is connected to the SOUT terminal, the VIN pin _{V S} output from the voltage selector 51 is connected. Further, the same V3 as the operation power supply voltage of the camera microcomputer 20 is connected to the VOUT terminal. As described above, V _S (that is, V1 or V2) output from the voltage selector 51 is a communication voltage between the camera 10 and the interchangeable lens 100.

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

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

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

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

  Regardless of which of the first and second interchangeable lenses is mounted, a voltage is input to the MIF_IN terminal after the voltage input to the DTEF_IN terminal (or at the same time) (t0, t1). When the camera is activated (t2), the lens type is determined and the communication voltage is set according to the determination result (t3), and then energization and communication with the interchangeable lens 100 are started (t4). In some cases, the interchangeable lens is attached to the camera after the camera is activated. In this case, the order of t0, t1, and t2 is reversed, but after the voltage input to the DTEF_IN terminal (or at the same time) ) Is input to the MIF_IN terminal.

  When performing such an operation (or control) when the lens is mounted, the mount 1 has a DTEF terminal regardless of whether the interchangeable lens 100 is either the first or second interchangeable lens or the timing of camera activation. Need to be connected earlier (or simultaneously) than the MIF terminal. This is due to the following reason. As described above, the camera microcomputer 20 reads the voltage value of the DTEF_IN terminal when the MIF_IN terminal becomes L. Here, if the DTEF terminal is not connected even though the MIF_IN terminal becomes L, it is determined as a non-compatible lens as described above, 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 perform communication with the interchangeable lens 100 at an appropriate communication voltage, the DTEF terminal needs to be securely connected when the MIF_IN terminal becomes L.

  Next, the lens side including the configuration of the camera side connector including the camera side contact pins constituting the camera side terminal in the mount 1 and 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.

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

  The camera side mount 201 is fixed to a front end portion of a camera body (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. And the camera side bayonet nail | claw 201a is provided in three places of the circumferential direction (henceforth a mount circumferential direction) inside this mount reference plane 201b. Further, the camera side mount 201 is provided with a lock pin 205 for positioning in the direction of relative rotation with the lens side mount 301 so as to protrude and retract with respect to the mount reference surface 201b.

  A lens side mount (accessory side mount) 301 is fixed to a rear end portion of an interchangeable lens (not shown). The lens-side mount 301 has a mount reference surface 301b that is a reference surface in the optical axis direction at the rear end on the outer peripheral side, and lenses are provided at three locations in the circumferential direction (mounting circumferential direction) inside the mount reference surface 301b. It has a side bayonet claw (accessory side bayonet claw) 301a. Further, the lens side mount 301 is formed with a lock hole portion 301c into which the lock pin 205 of the camera side mount 201 is inserted so as to open at the mount reference surface 301b. The lock hole 301 has an inner diameter that engages with the lock pin 205 with little play in the mount circumferential direction (relative rotation direction), and the lock pin in the radial direction of the lens side mount 301 (hereinafter referred to as the mount radial direction). It is 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 301c when the lens is mounted (relative rotation).

A camera-side contact seat for holding _nine camera-side contact pins 202a ₁ , 202a ₂ ,..., 202a ₉ arranged in the circumferential direction of the mount on a part of the area inside the bayonet claw 201a in the camera-side mount 201 ( A camera side contact holding part) 202 is formed. As shown in FIG. 4, each of the camera side contact pins 202a _{1 to} 202a ₉ can protrude forward or retract backward into a pin holding hole formed in the camera side contact seat 202 (projection retracting direction). Can be moved). A flexible printed wiring board 206 is disposed on the bottom surface of each pin holding hole. Between the flexible printed wiring board 206 and the flange portion of each camera side contact pin, a contact spring (202b ₁ , 202b ₂₎ that biases the camera side contact pin in a direction protruding forward from the camera side contact seat 202. ,..., 202b ₉ ) are arranged.

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

The camera side contact seat 202, the camera side contact pin 202a _n (n = 1 to 9, which is the same in the following description), the contact spring 202b _n and the flexible printed wiring board 206 constitute a camera side connector. .

A lens side contact seat for holding _nine rectangular lens side contact patterns 302a ₁ , 302a ₂ ,..., 302a ₉ arranged in the circumferential direction of the mount in a part of the area inside the bayonet claw 301a in the lens side mount 301. (Accessory side contact holding part) 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 302a _{1 to} 302a ₉ are connected to the L_CPU 151 shown in FIG. 1 via the flexible printed wiring board 306. In the lens side contact seat 302, a portion adjacent to a portion holding the lens side contact patterns 302a ₁ , 302a ₂ ,..., 302a ₉ (hereinafter referred to as a pattern holding portion) is a recess recessed forward of the pattern holding portion. 302z is formed. A slope 302w is formed between the pattern holding portion and the recess 302z. In the following description, that portion of the lens-side contact pattern 302a ₁ ~302a ₉ lens side contact base 302 together to hold the lens-side contact pattern 302a ₁ ~302a ₉ of the lens-side contact base 302.

The lens side contact patterns 302a _{1 to} 302a ₉ are arranged in this order with respect to the DTEF terminal, the DGND terminal, the LCLK terminal, the DLC terminal, the DCL terminal, the PGND terminal, the VBAT terminal, the VDD terminal, and the MIF terminal. It corresponds to _{1 to} 202a ₉ .

The above lens side contact seat 302 (including the concave portion 302z and the inclined surface 302w), the lens side contact pattern 302a _n (n = 1 to 9 and the same in the following description) and the flexible printed wiring board 306 are used to form a lens side connector. 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 However, it is pushed into the camera side contact seat 202. Thus, the camera-side contact pin 202a _n is pressed against the lens-side contact pattern 302a _n to form a pair therewith, the electrical connection between the camera and the interchangeable lens is performed.

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

  FIG. 5 (1) shows a state in which the lens side mount 301 is brought closer to the camera side mount 201 in the optical axis direction until each lens side bayonet claw 301a is inserted between the two camera side bayonet claws 201a. Is shown. Hereinafter, the state shown in FIG. 5A is referred to as a pre-mount contact state. In FIG. 5B, the lens-side bayonet claw 301a is inserted between the camera-side bayonet claw 201a, and the lens-side mount 301 (mount reference surface 301b) is directed to the camera-side mount 201 (mount reference surface 201b) in the optical axis direction. The state which contact | abutted is shown. Hereinafter, the state shown in (2) is referred to as a mount contact state (first state).

  (3) to (7) in FIG. 5 are states in which the lens side mount 301 is being rotated from the mount contact state to the camera side mount 201 toward the coupling completion state (second state) (relative). Rotating: Hereinafter, the intermediate rotating state) is shown for each stage. (8) of FIG. 5 shows a state in which the lens side mount 301 is rotated to the coupling completion state with respect to the camera side mount 201.

(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. Accordingly, the camera side contact pin 202a ₁ is pushed into the camera side contact seat 202 as compared with the state before the mount contact of (1).

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, camera side contact pins 202a _{2 to} 202a ₉ other than the first camera side contact pins, that is, the camera side contact pins 202a to 202a ₉ that do not contact the lens side contact seat 302 in the mount contact state are also referred to as second camera side contact pins. Among these, the camera side contact pin 202a ₉ for the MIF terminal is a specific second camera side contact pin.

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

The engagement between the lens side bayonet claw 301a and the camera side bayonet claw 201a from the mount contact state of (2) through the intermediate rotation state of (3) to (7) to the connection completion state of (8). Complete. During this time, the second camera side contact pins 202 a _{2 to} 202 a ₉ are pushed into the camera side contact seat 202 while the lens side contact seat 302 slides with respect to the camera side contact pins 202 a _{1 to} 202 a ₉ . 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, when the coupling is completed, the positions of the lock pin 205 and the lock hole portion 301 c in the mounting circumferential direction coincide with each other. Therefore, the lock pin 205 protruding from the mount reference surface 201 b of the camera side mount 201 is moved to It is inserted into the lock hole 301c. As a result, the coupling completion state is maintained until the lock pin 205 is removed from the lock hole 301c by a 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 coupling completed state is referred to as a pin contact position. The pitch of the lens side contact pattern corresponds to the distance between the pin contact positions on adjacent contact patterns.

Further, the lens-side contact pattern 302a _n in the figure in the pin contact positions with the lens-side contact pattern _{a n} on the left end (i.e., the lens-side contact pattern 302a _n is in the direction of movement of the camera-side contact pin 202a _n The distance from the tip) is assumed to be La _n (La _{1 to} La ₉ ). At this time, La _{1 to} La ₉ are
_{La 1> La 2, La 3} , La 4, La 5, La 6, La 8> La 9> La 7
Is set to have a relationship.

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

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

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

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

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 (VBAT terminal pin) 202a ₇ and The lens side contact pattern (VBAT terminal pattern) 302a ₇ starts to contact.

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

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

The distance 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). L _A and _L if _B and are the same, the lens-side mount 301 from the state of (3) in FIG. 5 is rotated, the corresponding camera-side contact pin 202a _1, 202a ₉ for DTEF terminals and MIF terminal The lens side contact patterns 302a ₁ and 202a ₉ respectively start to contact at the same time.

Next, a problem relating to the first camera side contact pin 202a ₁ and a solution thereof will be described. When the lens-side mount 301 when reaching from the mount contact previous state to the mount abutment state is vigorously abut against the camera side mount 201, the lens-side contact base 302 against the first camera-side contact pin 202a ₁ Collide strongly. The first camera side contact pin 202a ₁ is inserted into the pin holding hole portion of the camera side contact seat 202 so as to be movable (that is, with a fitting backlash that allows movement). Therefore, the first camera side contact pin 202a ₁ is deformed by being tilted or bent according to the amount of engagement between the first camera side contact pin 202a1 and the pin holding hole from the position where the first camera side contact pin 202a1 extends almost straight in the optical axis direction. There is a risk of doing so. In this case, even when the coupling is completed, the first camera side contact pin 202a ₁ and the lens side contact pattern 302a ₁ paired therewith are not normally in contact with each other. May cause a power 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.
<About the width and height of the lens side contact pattern (accessory side 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). The second lens-side contact patterns 302a _{2 to} 302a ₉ are contact surfaces that do not contact the _first camera-side contact pin 202a ₁ in the coupling completed state. The lens side contact pattern 302a ₉ for the MIF terminal corresponds to a specific second accessory side contact surface. The widths of the second lens side contact patterns 302a _{2 to} 302a ₉ are set to L1, as shown in FIGS. 7A and 8A. 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, a second lens side contact pattern corresponding to the second camera side contact pin 202a _x is indicated by 302a _x , and second lens side contact patterns adjacent to each other are indicated by 302a _x and 302a _{x + 1} .

As shown in FIG. 8A, the width L1 is such that the second camera-side contact pin 202a _x that extends substantially straight in the optical axis direction and does not deform contacts 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, the lens side contact pattern 302a ₁ paired with (corresponding to) the first camera side contact pin 202a ₁ for the DTEF terminal is hereinafter referred to as a first lens side contact pattern (first accessory side contact surface). That's it. As shown in FIGS. 7B and 8B, the width of the _first lens side contact pattern 302a1 is set to L2 larger than L1. In FIG. 7B and FIG. 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} . The first lens side contact pattern corresponding to the first camera side contact pin 202a _y is indicated by 302a _y , and the first and second lens side contact patterns adjacent to each other are indicated by 302a _y and 302a _{y + 1} .

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

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

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

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

Thus, in this embodiment, the first the first width of the lens-side contact pattern 302a _y corresponding to the camera-side contact pin 202a _y, the second camera side contact pin is not the possibility that the inclination or deformation may occur 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 pin 202a _x (202a ₁ ) is tilted or deformed by the contact (collision) of the lens side contact seat 302, these and the first lens side contact pattern 302a _x (302a). Normal contact (electrical connection) with ₁ ) can be ensured. Therefore, a communication error between the camera and the interchangeable lens can be avoided.

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 an arc shape on the lens side mount 301.
<< Pitch and spacing between lens side contact patterns (between accessory side contact surfaces) and pitch between camera side contact pins >>
The pitch and interval between the second lens side contact patterns 302a _x and 302a _{x + 1} (302a _{2 to} 302a ₉ ) are set to P1 and Q1, respectively, as shown in FIGS. 7A and 8A. Yes. The pitch of the lens side contact pattern here corresponds to the distance between the pin contact positions on adjacent contact patterns. The interval between the lens side contact patterns is a distance between one lens side contact pattern and the adjacent lens side contact pattern in the mount circumferential direction (between sides when the contact pattern is rectangular). The distance between the lens side contact patterns has an important meaning in the contact between the lens side contact pattern and the camera side contact pins. Further, the pitch between the second camera side contact pins 202a _x and 202a _{x + 1} (the distance between the pin center axes) is also set to P1 in accordance with the pitch P1 of the second lens side contact patterns 302a _x and 302a _{x + 1.} Yes.

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 determined so as to satisfy the above conditions.

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

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

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

By satisfying the first to third conditions, the adjacent second lens side contact patterns 302a _x , 302a _{x + 1} and the adjacent second camera side contact pins 202a _x , 202a _{x + 1} are turned on at the same time, and the power supply is short-circuited. 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 FIGS. 7B and 8B, respectively. Thus, P2 and Q2 which are larger than P1 and Q1 are set. In accordance with the pitch P2 between the first and second lens side contact patterns 302a _y and 302a _{y + 1} , the pitch between the first and second camera side contact pins 202a _y and 202a _{y + 1} (distance between the pin center axes) is also set. P2 is set.

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

As the first condition, as shown in FIG. 9 (B), during rotation of the interchangeable lens when the lens mounting / removal, the first and second lens side first camera-side contact pins 202a _y are adjacent to each other Do not touch the contact patterns 302a _y and 302a _{y + 1} at the same time. 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 a 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 contacts the first and second lens side contact patterns 302a _y and 302a _{y + 1} at the same time.

As described above, the camera side contact pin 202 a ₁ may be inclined or deformed by the contact (collision) of the lens side contact seat 302. Here, the first lens side contact pattern 302 ₁ DTEF camera side contact pin 202a ₁ on the second lens side contact pattern DGND terminal pattern 302 ₂ adjacent thereto and the terminal pattern is simultaneously contacts, the following Trouble occurs. As described above, the camera microcomputer 20 determines the type of the interchangeable lens 100 attached based on the voltage value of the DTEF_IN terminal. If the camera-side contact pin 202a ₁ contacts the DTEF terminal pattern and the DGND terminal pattern at the same time, the DTEF terminal pattern and the DGND terminal pattern become conductive, and the camera microcomputer 20 erroneously determines the lens type. 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 is different from the actually mounted interchangeable lens, an appropriate communication voltage is not set, Communication cannot be performed correctly. Therefore, in this embodiment, in consideration of the inclination and deformation camera side contact pin 202a _{1, 1} and the first lens side contact pattern 302, and the space between it and the second lens-side pattern 302 ₂ adjacent thereto Yes.

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

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

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

In FIGS. 3A and 3B, the pitches P1 and P2 are set in an angular range 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 and _θP2 are shown. FIG. 3B shows the intervals Q1 and Q2 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.

In consideration of the amount of rotation at the time of bayonet coupling, it is preferable that the pitch between the camera side contact pins is as small as possible within the range where the above-mentioned power supply short circuit does not occur so that the amount of rotation does not increase. 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 this embodiment, the case where one first lens side contact pattern is provided has been described. However, a plurality of first lens side contact patterns may be provided together with the first camera side contact pins. . 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. Good. 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 interval between the first and second lens side contact patterns adjacent to each other may not necessarily be the same as the pitch and interval between the two first lens side 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 (where Q1 <Q2a)
It may be. In this case, the pitch between the first lens side contact patterns adjacent to each other and the pitch between the first and second camera side contact pins adjacent to each other are set to P2a and P2b, respectively.

As described above, in this embodiment, the first and second lens side contact patterns and the first and second camera side contact pins that satisfy the following conditions (1) to (3) are used. As described above, P2 and Q2 include 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 tilted or deformed due to the lens side contact seat strongly coming into contact with the first camera side contact pin, the first camera side contact pin comes into contact with the first camera side contact pin. Normal contact (electrical connection) with the first lens side contact pattern can be ensured. Therefore, it is possible to prevent the occurrence of a communication error between the camera and the interchangeable lens due to such a normal contact not being performed, and the occurrence of a malfunction of the camera or the interchangeable lens due to a power supply short circuit.

Further, as a condition on the operation at the time of mounting of the interchangeable lens to the camera (or control on), it is desirable to satisfy the fourth condition that the distance L _A where the aforementioned distance L _B is less than or the same. That is, it is desirable that at least one of the width L2, the pitch P2, and the interval Q2 is set so that the DTEF terminal is connected earlier than or simultaneously with the MIF terminal.
<About the diameter of the contact pin on the camera side>
As described above, the first camera side contact pin 202a _y (202a ₁ ) may be deformed, for example, bent due to a strong collision with the lens side contact seat 302 in the mount contact state. Such deformation, FIG. 12 (A), the of (B), the diameter φD2 of the first camera-side contact pin 202a _y second camera-side contact pin _{202a y + 1 (202a 2 ~202a} 9) This can be suppressed by increasing the rigidity of the _first camera side contact pin 202a1 by making it 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 so as to satisfy the following condition (4).
φD1 <φD2 (4)
Thus, it is possible to make it difficult to communication error or power short circuit caused by the deformation of the first camera-side contact pin 202a _y more occur.

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

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

  Next, referring to FIGS. 2A, 2B, 3A, 3B, and 16, the camera side bayonet claw 201a, the lens side bayonet claw 301a, the camera side contact pin, and the lens side contact are used. The relationship with the pattern will be described.

3A, 3 </ b> B, and 16, the camera-side mount 201 and the lens-side mount 301 have a camera-side bayonet claw 201 a and a lens-side bayonet claw 301 a provided in the mount circumferential direction (relative rotational direction). _Are shown as θ _CB and θ _LB.

In the camera side mount 201, the camera-side contact pin 202a ₁ ~202a ₄ including a first camera-side contact pin 202a ₁ for DTEF terminal is disposed within an angular range indicated by theta _CB. In other words, the camera side contact pins 202a _{1 to} 202a ₄ are arranged in the camera side mount 201 so as to overlap with the camera side bayonet claw 201a in the mount radial direction. Further, in the lens side mount 301, the lens side contact patterns 302a ₁ and 302a ₂ including the first lens side contact pattern 302a ₁ for the DTEF terminal are disposed within an angle range indicated by θ _LB. In other words, the lens side contact patterns 302a ₁ and 302a ₂ are arranged in the lens side mount 301 so as to overlap with the lens side bayonet claws 301a in the mount radial direction.

By having such an arrangement relationship, the peripheral portions of the camera side contact pins 202a ₁ and 202a ₂ and the lens side contact patterns 302a ₁ and 302a ₂ are connected to the camera side and the lens side bayonet claws 201a and 301a in the coupling completed state. Are firmly coupled by the engagement. Therefore, even when an external force is applied in a direction such as to fold with respect to the camera 10 to the interchangeable lens 100, at least a first camera-side contact pin 202a ₁ is contact between the first lens side contact pattern 302a ₁ is maintained, these The occurrence of poor contact is prevented.

The DTEF terminal formed by the first camera-side contact pin 202a ₁ and the first lens-side contact pattern 302a ₁ has a camera 10-interchangeable lens corresponding to the type of the interchangeable lens 100, compared to other communication system terminals. This is an important terminal related to the setting of the communication voltage between 100. Therefore, as described above, in the process of attaching the interchangeable lens 100 to the camera 10, the DTEF terminal (the first camera side contact pin 202a ₁ and the first lens side contact pattern 302a ₁ ) comes before the other terminals. It is provided that contact is initiated.

  Even if a contact failure occurs temporarily in another communication system terminal, it can be recovered by performing re-communication or the like. However, the DTEF terminal is a terminal that determines the communication voltage (and in some cases, the driving voltage of the interchangeable lens) itself. If the contact of this terminal becomes unstable, erroneous communication is performed and the interchangeable lens malfunctions. The reliability of the camera system is impaired.

On the other hand, according to the present embodiment, the contact reliability of the DTEF terminals (202a ₁ , 302a ₁ ) is ensured even when the above external force is applied. Therefore, the camera 10 correctly determines the type of the interchangeable lens 100, and the camera 10 can set an appropriate communication voltage for the type of the interchangeable lens 100.

  In the present embodiment, the case where the camera determines the type of the interchangeable lens attached to the camera based on the voltage of the DTEF terminal has been described. However, the exchange is performed using a digital signal other than the voltage or other signal to be communicated. The type of lens may be determined.

FIGS. 11A to 11C show a case where the conditions (2) and (3) described above 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. 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 L1 which is the same as the width of the second lens side contact pattern 302a _x (302a _{y + 1} ). However, L1 here is greater than L1 shown in Example 1, than the range in which the first camera-side contact pins 202a _y may contact the first lens side contact pattern 302a _y (contact expected range) WW Is also set slightly larger.

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

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

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

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

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

  A camera accessory such as an interchangeable lens capable of good electrical connection with the camera can be provided.

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 (8)

A camera accessory having an accessory side mount that is detachably coupled to a camera side mount provided on the camera,
The accessory-side mount has a plurality of accessory-side bayonet claws, and the accessory-side bayonet claws are inserted between a plurality of camera-side bayonet claws provided on the camera-side mount from the first state to the camera side. By rotating relative to the mount, the accessory-side bayonet claw and the camera-side bayonet claw engage with each other to complete the coupling with the camera-side mount,
The accessory side contact holding part provided in the accessory side mount holds a plurality of accessory side contact surfaces arranged in the relative rotation direction of the accessory side and the camera side mount,
The camera side contact holding part provided in the camera side mount holds a plurality of camera side contact pins arranged in the relative rotation direction,
In the second state, the camera accessory and the camera are electrically connected by contacting the plurality of accessory side contact surfaces and the plurality of camera side contact pins,
The first accessory side contact surface of the plurality of accessory side contact surfaces and the first camera side contact pin among the plurality of camera side contact pins contact each other, so that the camera is mounted on the camera. A signal used to determine the type of the camera accessory is input from the camera accessory to the camera.
The camera is characterized in that the first accessory side contact surface is disposed within an angle range in the relative rotation direction of the accessory side mount and in which the accessory side bayonet claw is provided. accessory. The camera side contact holding part holds the plurality of camera side contact pins so as to be movable in the protruding and retracting direction.
The first camera side contact pin abuts on the accessory side contact holding portion including the accessory side contact surface in the first state,
Of the plurality of camera side contact pins, a camera side contact pin that does not contact the accessory side contact holding part including the accessory side contact surface in the first state is defined as a second camera side contact pin.
When an accessory side contact surface that does not contact the first camera side contact pin in the second state among the plurality of accessory side contact surfaces is a second accessory side contact surface,
In the relative rotation direction,
A pitch between the first accessory side contact surface and the second accessory side contact surface adjacent thereto is larger than a pitch between the plurality of second accessory side contact surfaces adjacent to each other; or ,
An interval between the first accessory side contact surface and the second accessory side contact surface adjacent to the first accessory side contact surface is larger than an interval between the plurality of second accessory side contact surfaces adjacent to each other. Or
The camera accessory according to claim 1, wherein a width of the first accessory side contact surface is larger than a width of the second accessory side contact surface. The first camera side contact pin abuts on the accessory side contact holding portion including the accessory side contact surface in the first state,
Of the plurality of camera side contact pins, a camera side contact pin that does not contact the accessory side contact holding part including the accessory side contact surface in the first state is defined as a second camera side contact pin.
The accessory side contact surface that does not contact the first camera side contact pin in the second state among the plurality of accessory side contact surfaces is defined as a second accessory side contact surface,
Of the second camera side contact pin and the second accessory side contact surface, provided to input a signal used to detect attachment of the camera accessory to the camera from the camera accessory to the camera, When the camera-side contact pin and the accessory-side contact surface that are in contact with each other in the state of 2 are a specific second camera-side contact pin and a specific second accessory-side contact surface, respectively,
The first accessory-side contact surface includes the specific second accessory-side contact surface during rotation of the accessory-side mount relative to the camera-side mount from the first state to the second state. 2. The apparatus according to claim 1, wherein the first camera-side contact pin is provided so as to start contact with the first camera-side contact pin earlier than or simultaneously with the start of contact with the specific second camera-side contact pin. Camera accessories.   In the relative rotation direction, a position of a portion of the first accessory side contact surface that starts contact with the first camera side contact pin during the relative rotation and the specific second accessory side contact surface. The distance between the first camera side contact pin and the specific second camera side contact pin is a distance between the position of the portion that starts contact with the specific second camera side contact pin during the relative rotation. The camera accessory according to claim 3, wherein the camera accessory is smaller than or equal to the distance. A camera having a camera-side mount to which an accessory-side mount provided on the camera accessory is detachably coupled,
The camera side mount has a plurality of camera side bayonet claws, and the accessory side bayonet claws provided on the accessory side mount are inserted between the plurality of camera side bayonet claws from the first state to the accessory side. By rotating relative to the mount, the camera-side bayonet claw and the accessory-side bayonet claw engage with each other to complete the coupling with the accessory-side mount,
The accessory side contact holding part provided in the accessory side mount holds a plurality of accessory side contact surfaces arranged in the relative rotation direction of the accessory side and the camera side mount,
The camera-side contact holding portion provided in the camera-side mount holds a plurality of camera-side contact pins arranged in the relative rotation direction so as to be movable in the protruding and retracting direction.
In the second state, the camera and the camera accessory are electrically connected by contacting the plurality of camera side contact pins and the plurality of accessory side contact surfaces,
The first camera side contact pin among the plurality of camera side contact pins and the first accessory side contact surface among the plurality of accessory side contact surfaces are in contact with each other, so that the camera is attached to the camera. A signal used to determine the type of the camera accessory is input to the camera from the camera accessory,
The camera is characterized in that the first camera side contact pin is disposed in an angle range in the relative rotation direction of the camera side mount and in which the camera side bayonet claw is provided. . The camera side contact holding part holds the plurality of camera side contact pins so as to be movable in the protruding and retracting direction.
The first camera side contact pin abuts on the accessory side contact holding portion including the accessory side contact surface in the first state,
When a camera side contact pin that does not contact the accessory side contact holding part including the accessory side contact surface in the first state among the plurality of camera side contact pins is a second camera side contact pin,
In the relative rotation direction,
A pitch between the first camera side contact pin and the second camera side contact pin adjacent to the first camera side contact pin is larger than a pitch between the second camera side contact pins adjacent to each other; or
6. The pitch between the first camera-side contact pins adjacent to each other among the plurality of first camera-side contact pins is larger than the pitch between the second camera-side contact pins. Camera described in. The first camera side contact pin abuts on the accessory side contact holding portion including the accessory side contact surface in the first state,
Of the plurality of camera side contact pins, a camera side contact pin that does not contact the accessory side contact holding part including the accessory side contact surface in the first state is defined as a second camera side contact pin.
The accessory side contact surface that does not contact the first camera side contact pin in the second state among the plurality of accessory side contact surfaces is defined as a second accessory side contact surface,
Of the second camera side contact pin and the second accessory side contact surface, provided to input a signal used to detect attachment of the camera accessory to the camera from the camera accessory to the camera, When the camera-side contact pin and the accessory-side contact surface that are in contact with each other in the state of 2 are a specific second camera-side contact pin and a specific second accessory-side contact surface, respectively,
The first camera side contact pin and the specific second camera side contact pin during the relative rotation of the camera side mount with the accessory side mount from the first state to the second state 7. The apparatus according to claim 6, wherein contact with the first accessory-side contact surface is started earlier than or simultaneously with the start of contact with a specific second accessory-side contact surface. The listed camera.   In the relative rotation direction, the distance between the first camera side contact pin and the specific second camera side contact pin is the first camera during the relative rotation of the first accessory side contact surface. Between the position of the portion that starts contact with the side contact pin and the position of the portion that starts contact with the specific second camera side contact pin during the relative rotation of the specific second accessory side contact surface The camera according to claim 7, wherein the camera is greater than or equal to the distance.