Fitting

Abstract

The invention provides an accessory capable of stably communicating with a camera body. The accessory is attached to a camera body provided with a camera-side first clock terminal for outputting a first clock signal, a camera-side first data terminal for outputting a first data signal, and a camera-side third data terminal for inputting a third data signal. The accessory includes an eighth terminal in contact with the camera-side first clock terminal, a seventh terminal in contact with the camera-side first data terminal, and a ninth terminal in contact with the camera-side third data terminal, and the eighth terminal is disposed between the seventh terminal and the ninth terminal.

Description

[0001] This application is a divisional application of the patent application with application number 201811250951.9 and title "Accessory" filed on October 25, 2018. Technical Field

[0002] The present invention relates to an accessory (accessory, attachment). Background Art

[0003] Accessories that can be detached from and attached to a camera body are known (for example, Patent Document 1). Conventionally, it has been necessary to attach the accessory to the camera body in a state where it can be properly used.

[0004] Prior Art Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2004-117380 Summary of the Invention

[0006] According to the first aspect, the accessory is an accessory mounted on a camera body, the camera body includes a camera-side first clock terminal that outputs a first clock signal, a camera-side first data terminal that outputs a first data signal, and a camera-side third data terminal to which a third data signal is input, the accessory includes an eighth terminal that contacts the camera-side first clock terminal, a seventh terminal that contacts the camera-side first data terminal, and a ninth terminal that contacts the camera-side third data terminal, and the eighth terminal is disposed between the seventh terminal and the ninth terminal.

[0007] According to the second aspect, the accessory is an accessory mounted on a camera body, the camera body includes a camera-side second clock terminal to which a second clock signal is input, a camera-side third data terminal to which a third data signal is input, and a camera-side second data terminal to which a second data signal is input, the accessory includes a ninth terminal that contacts the camera-side third data terminal, a tenth terminal that contacts the camera-side second clock terminal, and an eleventh terminal that contacts the camera-side second data terminal, and the tenth terminal is disposed between the ninth terminal and the eleventh terminal.

[0008] According to the third technical solution, the accessory is an accessory mounted on the camera body. The camera body includes a camera-side first clock terminal for outputting a first clock signal, a camera-side first data terminal for outputting a first data signal, a camera-side third data terminal for receiving a third data signal, a camera-side second clock terminal for receiving a second clock signal, and a camera-side second data terminal for receiving a second data signal. The accessory includes a seventh terminal in contact with the camera-side first data terminal, an eighth terminal in contact with the camera-side first clock terminal, a ninth terminal in contact with the camera-side third data terminal, a tenth terminal in contact with the camera-side second clock terminal, and an eleventh terminal in contact with the camera-side second data terminal. The eighth terminal is disposed between the seventh terminal and the ninth terminal, and the tenth terminal is disposed between the ninth terminal and the eleventh terminal.

[0009] According to the fourth technical solution, the accessory is an accessory mounted on the camera body, and includes: a seventh terminal for receiving a first data signal from the camera body; an eighth terminal for receiving a first clock signal from the camera body; a ninth terminal for outputting a third data signal to the camera body; a tenth terminal for outputting a second clock signal to the camera body; and an eleventh terminal for outputting a second data signal to the camera body. The eighth terminal is disposed between the seventh terminal and the ninth terminal, and the tenth terminal is disposed between the ninth terminal and the eleventh terminal. Description of the Drawings

[0010] Figure 1 is a diagram schematically showing the configuration of the camera system.

[0011] Figure 2 is a circuit diagram schematically showing the electrical connection between the camera body and the interchangeable lens (replaceable lens).

[0012] Figure 3 is a timing chart showing an example of command data communication.

[0013] Figure 4 is a timing chart showing an example of hot line communication.

[0014] Figure 5 is a front view schematically showing the mounting (mounting, adapter) surface of the camera body as viewed from the interchangeable lens side.

[0015] Figure 6 is a front view schematically showing the mounting surface of the interchangeable lens as viewed from the camera body side.

[0016] Reference Numeral Description

[0017] 1 Camera system; 2 Camera body; 3 Interchangeable lens; 21 Body side mount; 22 Body side terminal holding part; 31 Lens side mount; 32 Lens side terminal holding part. Detailed implementation

[0018] (The first implementation)

[0019] Figure 1 It is a diagram showing an overview of the configuration of the camera system 1 according to the first implementation. The camera system 1 includes a camera body 2 and an interchangeable lens 3, and the interchangeable lens 3 is an example of a component that can be detached from and attached to the camera body 2.

[0020] The interchangeable lens 3 has a lens side mount 31, a lens side terminal holding part 32, a lens side control part 33, a lens side communication part 34, a lens side storage part 35, a photographing (imaging) optical system 36, and a driving part 37. The lens side mount 31 and the lens side terminal holding part 32 will be described in detail later.

[0021] The lens side control part 33 is composed of a microcomputer and its peripheral circuits, etc. The lens side communication part 34 performs data communication described later with the camera body 2. The lens side communication part 34 is connected to a lens side terminal group (described later) provided in the lens side terminal holding part 32 and the lens side control part 33. The lens side storage part 35 is a non-volatile storage medium. The lens side storage part 35 is connected to the lens side control part 33. Predetermined control programs and the like executed by the lens side control part 33 are pre-stored in the lens side storage part 35. The lens side control part 33 controls the interchangeable lens 3 by loading and executing the control program from the lens side storage part 35.

[0022] The photographing optical system 36 forms an image of the subject (photographing object) on the photographing surface of a photographing element 27 described later. The optical axis O of the photographing optical system 36 substantially coincides with the center positions of the lens side mount 31 and the body side mount 21 described later. Figure 1 The photographing optical system 36 generally includes a lens 36a, a focusing lens 36b, and a lens 36c. The focusing lens 36b is a lens that adjusts the imaging position of the subject image. The driving part 37 is connected to the lens side control part 33 and has an actuator etc. not shown. The driving part 37 drives the focusing lens 36b in the optical axis direction (+Z direction, -Z direction) through the actuator etc.

[0023] The camera body 2 has a body side mount 21, a body side terminal holding part 22, a body side control part 23, a body side communication part 24, a body side storage part 25, a power supply part 26, a photographing element 27, and a switch 28 that detects the state of a lock pin described later.

[0024] The body side control unit 23 is composed of a microcomputer and its peripheral circuits, etc. In addition, the body side control unit 23 performs various controls of the camera body, but only the part related to communication is described in this disclosure, and other functions are omitted. The body side communication unit 24 performs data communication described later with the interchangeable lens 3. The body side communication unit 24 is connected to a body side terminal (described later) provided in the body side terminal holding unit 22 and the body side control unit 23. In addition, a part of the terminals of the body side terminal holding unit 22 is connected to the body side control unit 23 as described later. The body side storage unit 25 is a non-volatile storage medium. The body side storage unit 25 is connected to the body side control unit 23. Predetermined control programs and the like executed by the body side control unit 23 are pre-stored in the body side storage unit 25. The body side control unit 23 controls the camera body 2 by loading the control program from the body side storage unit 25 and executing the program.

[0025] The power supply unit 26 has a power source and supplies power to the inside of the camera body 2 and the interchangeable lens 3. The power supply unit 26 is connected to a body side terminal group (described later) provided in the body side terminal holding unit 22 and the body side control unit 23. The imaging element 27 is a solid-state imaging element such as a CCD and / or a CMOS, for example. The imaging element 27 is connected to the body side control unit 23, captures a subject, and outputs a captured signal. The description of the processing of the output captured signal is omitted.

[0026] Figure 2 is a circuit diagram schematically showing the electrical connection between the camera body 2 and the interchangeable lens 3. The body side terminal holding unit 22 has LDET(B) terminal, VBAT(B) terminal, PGND(B) terminal, V33(B) terminal, GND(B) terminal, RDY(B) terminal, DATAB(B) terminal, CLK(B) terminal, DATAL(B) terminal, HCLK(B) terminal, and HDATA(B) terminal. The above-mentioned total of 11 body side terminals are collectively referred to as the body side terminal group.

[0027] The LDET(B) terminal is a terminal used for detecting the attachment and detachment of the interchangeable lens 3. The LDET(B) terminal is connected to the body side control unit 23 via a resistor R2. Between the resistor R2 and the body side control unit 23, a power source V33 supplied from the power supply unit 26 is connected via a resistor R1, and the LDET(B) terminal is pulled up.

[0028] The VBAT(B) terminal, PGND(B) terminal, V33(B) terminal, and GND(B) terminal are power system terminals connected to the power supply unit 26. Figure 2In the figure, the direction of the supplied power is indicated by an arrow. The VBAT(B) terminal is a terminal used for supplying power to the interchangeable lens 3. The drive unit 37 of the interchangeable lens 3 is driven by the power supplied via the VBAT(B) terminal. Compared with the lens-side control unit 33, a larger voltage and a larger current are required during the operation of the drive unit 37, and the maximum voltage applied by the power supply unit 26 to the VBAT(B) terminal is about 10V. In the following description, the voltage applied by the power supply unit 26 to the VBAT(B) terminal is referred to as the drive system voltage. The PGND(B) terminal is a ground terminal corresponding to the VBAT(B) terminal.

[0029] The V33(B) terminal is a terminal used for supplying power to the interchangeable lens 3. The lens-side control unit 33 and the like operate using the power supplied by the power supply unit 26 via the V33(B) terminal. Compared with the drive unit 37, each part such as the lens-side control unit 33 operates with a smaller voltage and a smaller current. The maximum voltage applied by the power supply unit 26 to the V33(B) terminal is about 3.3V. In the following description, the voltage applied by the power supply unit 26 to the V33(B) terminal is referred to as the circuit system voltage. The GND(B) terminal is a ground terminal corresponding to the V33(B) terminal.

[0030] The RDY(B) terminal is connected to the body-side communication unit 24. The DATAB(B) terminal, the CLK(B) terminal, the DATAL(B) terminal, the HCLK(B) terminal, and the HDATA(B) terminal are communication system terminals connected to the body-side communication unit 24. The RDY(B) terminal, the DATAB(B) terminal, the CLK(B) terminal, and the DATAL(B) terminal are used for the command data communication described later. In addition, the HCLK(B) terminal and the HDATA(B) terminal are connected to the body-side communication unit 24 and are used for the hotline communication described later. In Figure 2 the figure, the signal flow direction is indicated by an arrow. The potential of the RDY(B) terminal indicates whether the interchangeable lens 3 can perform command data communication. The DATAB(B) terminal is a terminal for outputting a data signal to the interchangeable lens 3. The CLK(B) terminal is a terminal for outputting a clock signal to the interchangeable lens 3.

[0031] The DATAL(B) terminal is a terminal to which a data signal from the interchangeable lens 3 is input.

[0032] The HCLK(B) terminal is a terminal to which a clock signal from the interchangeable lens 3 is input. The HDATA(B) terminal is a terminal to which a data signal from the interchangeable lens 3 is input.

[0033] The lens-side terminal holding portion 32 has an LDET(L) terminal, a VBAT(L) terminal, a PGND(L) terminal, a V33(L) terminal, a GND(L) terminal, a RDY(L) terminal, a DATAB(L) terminal, a CLK(L) terminal, a DATAL(L) terminal, a HCLK(L) terminal, and a HDATA(L) terminal. The above-mentioned total of 11 lens-side terminals are collectively referred to as the lens-side terminal group. When the replacement lens 3 is attached to the camera body 2, as shown by the dotted line in Figure 2 , the body-side terminals and the lens-side terminals are electrically connected. Specifically, the LDET(B) terminal is connected to the LDET(L) terminal, the VBAT(B) terminal is connected to the VBAT(L) terminal, the PGND(B) terminal is connected to the PGND(L) terminal, the V33(B) terminal is connected to the V33(L) terminal, the GND(B) terminal is connected to the GND(L) terminal, the RDY(B) terminal is connected to the RDY(L) terminal, the DATAB(B) terminal is connected to the DATAB(L) terminal, the CLK(B) terminal is connected to the CLK(L) terminal, the DATAL(B) terminal is connected to the DATAL(L) terminal, the HCLK(B) terminal is connected to the HCLK(L) terminal, and the HDATA(B) terminal is connected to the HDATA(L) terminal. Regarding the functions of the respective lens-side terminals, since they are the same as the functions of the body-side terminals with which they respectively come into contact, the description thereof is omitted.

[0034] The LDET(L) terminal is grounded via a resistor R3. When the LDET(L) terminal comes into contact with the LDET(B), the potential of the LDET(B) terminal is pulled down. The VBAT(L) terminal and the PGND(L) terminal are connected to the drive unit 37. A so-called bypass capacitor C1 is connected between the VBAT(L) terminal and the PGND(L) terminal. The V33(L) terminal and the GND(L) terminal are connected to various parts such as the lens-side control unit 33. A bypass capacitor C2 is connected between the V33(L) terminal and the GND(L) terminal. The RDY(L) terminal, the DATAB(L) terminal, the CLK(L) terminal, the DATAL(L) terminal, the HCLK(L) terminal, and the HDATA(L) terminal are respectively connected to the lens-side communication unit 34.

[0035] (Description of command data communication)

[0036] The following communication is called command data communication: after sending a control instruction (command) from the body-side control unit 23 to the lens-side control unit 33 of the interchangeable lens 3, the control content (control data) from the body-side control unit 23 and the response content (response data) from the lens-side control unit 33 are transmitted and received in parallel. The command data communication is full-duplex communication. The command data communication is carried out via the body-side communication unit 24 and the lens-side communication unit 34 by digital data communication using the RDY(B) terminal, RDY(L) terminal, DATAB(B) terminal, DATAB(L) terminal, CLK(B) terminal, CLK(L) terminal, DATAL(B) terminal, and DATAL(L) terminal.

[0037] The body-side control unit 23 transmits various control instructions and control content to the interchangeable lens 3 through command data communication via the body-side communication unit 24 and the lens-side communication unit 34, and receives response content from the interchangeable lens 3, thereby transmitting and receiving various information with the interchangeable lens 3. The control instructions mentioned here refer to, for example, the transmission instruction of lens information. The various information received from the interchangeable lens 3 refers to, for example, the model (type) information of the interchangeable lens 3, information indicating optical characteristics such as the focal length of the photographing optical system 36, etc. The various information sent to the interchangeable lens 3 refers to, for example, control content such as the driving amount of the lens and / or the model information of the camera body 2, etc. In addition, the control instructions also include the driving instruction of the focusing lens 36b, etc. The lens-side control unit 33 receives various control instructions from the body-side control unit 23 through command data communication, obtains various information from the body-side control unit 23, and sends various information to the body-side control unit 23.

[0038] Figure 3 is an example of a timing diagram showing the timing of the command data communication. At the start of the command data communication (T1), the body-side control unit 23 first confirms the signal level of the RDY(B) terminal. The signal level of the RDY(B) terminal indicates whether the lens-side control unit 33 can perform command data communication. When the lens-side control unit 33 is in a state where it cannot perform command data communication, it sets the signal level (potential) of the RDY(L) terminal to a high level (H level). When the lens-side control unit 33 is in a state where it can perform command data communication, it sets the signal level (potential) of the RDY(L) terminal to a low level (L level) via the lens-side communication unit 34.

[0039] At the start of the command data communication (T1), if the signal level of the RDY(B) terminal is a low level (L level), the body-side control unit 23 outputs a clock signal 401 from the CLK(B) terminal via the body-side communication unit 24. That is, the body-side control unit 23 sends the clock signal 401 to the lens-side control unit 33 via the CLK(B) terminal and the CLK(L) terminal. Figure 3The frequency of the repeated high and low levels of the clock signal 401 is, for example, 8 MHz. The body-side control unit 23 outputs a body-side command signal 402 as a control command from the DATAB(B) terminal in synchronization with the clock signal 401. That is, the body-side control unit 23 transmits the body-side command signal 402 to the lens-side control unit 33 via the DATAB(B) terminal and the DATAB(L) terminal. Figure 3 The body-side command signal 402 indicated by the switching between the high and low levels of DATAB is a signal representing the control instructed by the body-side control unit 23 to the lens-side control unit 33 through command data communication. For example, the body-side command signal 402 is a signal representing a request for the model information of the replacement lens 3 and / or a signal representing an instruction to drive the focusing lens 36b.

[0040] When the lens-side control unit 33 receives the body-side command signal 402 via the lens-side communication unit 34, it uses the error detection code (such as check data, etc.) included in the body-side command signal 402 to perform an inspection process for checking whether there is a communication error in the body-side command signal 402. After that, the lens-side control unit 33 sets the signal level of the RDY(L) terminal to high level (H level) (T2). When the signal level of the RDY(B) terminal is high, the body-side control unit 23 does not transmit the body-side command signal 402.

[0041] Based on the instruction of the received body-side command signal 402, the lens-side control unit 33 starts the first control process 404.

[0042] When the first control process 404 is completed, the lens-side control unit 33 sets the signal level of the RDY(L) terminal to low level (L level) (T3) via the lens-side communication unit 34. When the signal level of the RDY(B) terminal becomes low, the body-side control unit 23 outputs a clock signal 405 from the CLK(B) terminal. That is, the body-side control unit 23 transmits the clock signal 405 to the lens-side control unit 33 via the CLK(B) terminal and the CLK(L) terminal.

[0043] In addition, when the signal level of the RDY(B) terminal is high, the body-side control unit 23 does not perform the transmission and reception of the body-side data signal 406 and the lens-side data signal 407.

[0044] The body side control unit 23 outputs a body side data signal 406 from the DATAB(B) terminal via the body side communication unit 24 in synchronization with the clock signal 405. That is, the body side control unit 23 sends the body side data signal 406 to the lens side control unit 33 via the DATAB(B) terminal and the DATAB(L) terminal. The body side data signal 406 is a signal representing the control parameter of the body side command signal 402. For example, when the body side command signal 402 is a signal indicating the drive of the focusing lens 36b, the corresponding body side data signal 406 is a signal representing the drive amount of the focusing lens 36b. Alternatively, the body side data signal 406 is a signal representing the information required by the lens side control unit 33 (such as the model information of the camera body) in the command data communication.

[0045] In addition, when the clock signal 405 is input to the CLK(L) terminal, the lens side control unit 33 outputs the lens side data signal 407 from the DATAL(L) terminal in synchronization with the clock signal 405. Figure 3 The lens side data signal 407 indicated by the switching of the high and low levels of the DATAL is a signal sent by the lens side control unit 33 to the body side control unit 23 through the command data communication. For example, when the body side command signal 402 is a signal requesting the model information of the replacement lens 3, the corresponding lens side data signal 407 is a signal representing the model information of the replacement lens 3.

[0046] When the transmission of the lens side data signal 407 is completed, the lens side control unit 33 sets the signal level of the RDY(L) terminal to high level again (T4). The lens side control unit 33 starts the second control process 408 (described later) based on the instruction of the received body side data signal 406.

[0047] Here, the first control process 404 and the second control process 408 performed by the lens side control unit 33 are described. For example, the case where the received body side command signal 402 requests specific information of the replacement lens 3 is described. As the first control process 404, the lens side control unit 33 executes the process of generating the requested information as the lens side data signal 407. The lens side data signal 407 generated in the first control process 404 is sent to the body side control unit 23 via the lens side communication unit 34, the DATAL(L) terminal, the DATAL(B) terminal, and the body side communication unit 24.

[0048] For example, a case where the received body-side command signal 402 is a signal indicating driving of the focusing lens 36b will be described. As the first control process 404, the lens-side control unit 33 executes a process of generating a signal indicating that a signal indicating driving of the focusing lens 36b has been received. The signal generated in the first control process 404 is sent as a lens-side data signal 407 to the body-side control unit 23 via the lens-side communication unit 34, the DATAL(L) terminal, the DATAL(B) terminal, and the body-side communication unit 24. As the second control process 408, the lens-side control unit 33 executes a process of driving the focusing lens 36b by a driving amount specified by the body-side data signal 406.

[0049] When the second control process 408 is completed, the lens-side control unit 33 sets the RDY(L) terminal to a low level (T5) via the lens-side communication unit 34.

[0050] The communication performed at the above timings T1 to T5 is one command data communication. In one command data communication, the body-side control unit 23 sends the body-side command signal 402 and the body-side data signal 406. That is, the body-side command signal 402 and the body-side data signal 406 together constitute one control data.

[0051] As described above, the lens-side control unit 33 concurrently receives control data from the body-side control unit 23 and sends response data to the body-side communication unit 24. That is, the command data communication is a so-called full-duplex communication.

[0052] (Description of hotline communication)

[0053] As another communication system, there is communication for sending data from the lens-side control unit 33 of the interchangeable lens 3 to the body-side control unit 23 of the camera body 2 in one direction, and this is called hotline communication. The hotline communication is data communication carried out by the body-side control unit 23 and the lens-side control unit 33 via the body-side communication unit 24 and the lens-side communication unit 34 and using the HCLK(B) terminal, the HCLK(L) terminal, the HDATA(B) terminal, and the HDATA(L) terminal. The body-side control unit 23 obtains information related to the state of the interchangeable lens 3 from the lens-side control unit 33 of the interchangeable lens 3 through hotline communication. Information related to the state of the interchangeable lens 3 refers to, for example, the position of the focusing lens 36b and / or the position of an image stabilization lens (not shown), the position of the aperture, etc. In addition, the image stabilization lens is a component that can be moved (driven) to have a component in a direction perpendicular to the optical axis direction, and the aperture is a component that can be moved (driven) to change the size of the opening through which the light beam passes. This hotline communication is as follows: when an instruction to start communication is sent from the camera body through command data communication, independently of the command data communication, the lens-side control unit 33 autonomously sends lens data to the body-side control unit 23 until an instruction to end communication is received.

[0054] Figure 4 is an example of a timing diagram showing the timing of hotline communication. When the lens-side control unit 33 receives a command to start hotline communication (T6) from the body-side control unit 23 of the camera body through command data communication, it performs generation process 501. Generation process 501 is a process of, for example, obtaining the state of the lens at a sampling period of 1 millisecond and generating a lens signal 503 for hotline communication. When the generation of the lens signal 503 is completed (T7), the lens-side control unit 33 outputs a clock signal 502 from the HCLK(L) terminal via the lens-side communication unit 34. That is, the clock signal 502 is sent to the body-side control unit 23 via the HCLK(L) terminal and the HCLK(B) terminal. Figure 4 The frequency of the repeated high and low levels of the clock signal 502 is, for example, 8 MHz to 20 MHz. That is to say, the frequency of the clock signal 502 of the hotline communication is of the same level as or higher than the frequency of the clock signal 401 of the command data communication.

[0055] The lens-side control unit 33 outputs the lens signal 503 (for example, information related to the position of the focusing lens 36b) generated in the generation process 501 from the HDATA(L) terminal via the lens-side communication unit 34 in synchronization with the clock signal 502. That is, the lens-side control unit 33 sends the lens signal 503 to the body-side control unit 23 via the lens-side communication unit 34, the HDATA(L) terminal, the HDATA(B) terminal, and the body-side communication unit 24. Figure 4The lens signal 503 indicated by the switching between the high level and the low level of HDATA is a signal sent from the lens-side control unit 33 to the body-side control unit 23 through hotline communication. The clock signal 502 and the lens signal 503 end their output at timing T8.

[0056] The lens-side control unit 33 repeats the transmission of lens data through hotline communication at regular intervals (for example, 1 millisecond) until it receives an instruction to stop the transmission of the lens signal 503 through command data communication.

[0057] Part or all of the command data communication and the hotline communication can be executed in parallel. That is, the body-side control unit 23 and the lens-side control unit 33 can start or end the hotline communication while performing the command data communication. In addition, the command data communication can also be started or ended while performing the hotline communication.

[0058] As described above, the hotline communication communicates independently of the command communication. The lens-side control unit 33 sends information related to the state of the interchangeable lens 3 to the body-side control unit 23 through the hotline communication regardless of the command communication. Thus, even during the command communication, the body-side control unit 23 can continue to grasp the state of the interchangeable lens 3. Therefore, the body-side control unit 23 can continue to grasp the position of the focusing lens 36b, so that, for example, it can control autofocus at high speed. The same applies to the shake correction control and / or the aperture control.

[0059] In addition, even while the lens-side control unit 33 is performing the hotline communication, the body-side control unit 23 can give various instructions to the interchangeable lens 3 through the command communication at any timing.

[0060] (Description of the lens mounting mechanism)

[0061] The camera system 1 of the present embodiment includes a so-called bayonet-type lens mounting mechanism. Hereinafter, the body-side fitting 21 of the camera body 2 and the lens-side fitting 31 of the interchangeable lens 3 will be described in turn.

[0062] Figure 5 FIG. (a) schematically shows the fitting of the camera body 2 as viewed from the side of the interchangeable lens 3. The camera body 2 includes Figure 1 the aforementioned body-side fitting 21 and the body-side terminal holding portion 22. The body-side fitting 21 has an annular reference surface with a certain width. Furthermore, the body-side fitting 21 has a body-side first claw portion 29a, a body-side second claw portion 29b, a body-side third claw portion 29c, and a body-side fourth claw portion 29d. In the following description, the above four claw portions are collectively referred to as the body-side claw portion 29.

[0063] The body side claw portions 29 are arranged at intervals along the circular opening of the body side fitting 21. As shown in (a) of Figure 5 , the first body side claw portion 29a is arranged at the upper right position, the second body side claw portion 29b is arranged at the upper left position, the third body side claw portion 29c is arranged at the lower left position, and the fourth body side claw portion 29d is arranged at the lower right position.

[0064] The circumferential lengths of the first body side claw portion 29a to the fourth body side claw portion 29d are different. Specifically, the first body side claw portion 29a is the longest, the third body side claw portion 29c is the second longest, the fourth body side claw portion 29d is the third longest, and the second body side claw portion 29b is the shortest.

[0065] The body side claw portions 29 protrude from the body side fitting 21 toward the center of the opening, and there are portions with the body side claw portions 29 and portions without the body side claw portions 29 on the circumference of the opening. In the following description, the space 40a between the first body side claw portion 29a and the fourth body side claw portion 29d on the circumference of the opening of the body side fitting 21 is referred to as the first body side insertion / removal portion 40a. Similarly, the space 40b between the first body side claw portion 29a and the second body side claw portion 29b is referred to as the second body side insertion / removal portion 40b, the space 40c between the second body side claw portion 29b and the third body side claw portion 29c is referred to as the third body side insertion / removal portion 40c, and the space 40d between the third body side claw portion 29c and the fourth body side claw portion 29d is referred to as the fourth body side insertion / removal portion 40d. The above four body side insertion / removal portions are collectively referred to as the body side insertion / removal portion 40.

[0066] A body side terminal holding portion 22 is provided inside the opening of the body side fitting 21. The body side terminal holding portion 22 has an arc shape corresponding to the shape of the annular body side fitting 21. The body side terminal holding portion 22 is arranged in parallel with the opening of the body side fitting 21 at the upper part of the opening of the body side fitting 21, and is preferably arranged at the center of the upper part as shown in (a) of Figure 5 . As described above, the body side terminal holding portion 22 has a plurality of body side terminals. In the body side terminal holding portion 22, the plurality of body side terminals are arranged in a row and in an arc shape inside the body side fitting 21. As shown in (a) of Figure 5 , the plurality of body side terminals are arranged with HDATA(B), HCLK(B), DATAL(B), CLK(B), DATAB(B), RDY(B), GND(B), V33(B), PGND(B), VBAT(B), LDET(B) from the right side to the leftmost side. Each terminal of the body side terminal group is a conductive pin. The body side terminal group is pushed in the -Z direction by a spring (not shown), etc. Figure 1)。- The Z direction refers to the direction towards the interchangeable lens 3 attached to the camera, which is the direction of the subject.

[0067] The body side fitting 21 has a hole through which the locking pin 42 passes. The hole through which the locking pin 42 passes is arranged at the upper right of the fourth body side claw portion 29d. That is to say, on the annular reference plane of the body side fitting 21, the hole of the locking pin 42 is arranged within the opening of the body side fitting 21 between the area where the fourth body side claw portion 29d is located and the area where the first body side claw portion 29a is located. The locking pin 42 is pushed in the -Z direction by a spring (not shown), etc. Figure 1 )。

[0068] Figure 5 Figure (b) is a schematic view of the fitting of the camera body 2 with the body side fitting 21 removed as observed from the side of the interchangeable lens 3. A first leaf spring 41a is provided at a position corresponding to the first body side claw portion 29a (the back side of the first body side claw portion 29a). Similarly, a second leaf spring 41b is provided at a position corresponding to the second body side claw portion 29b (the back side of the second body side claw portion 29b), a third leaf spring 41c is provided at a position corresponding to the third body side claw portion 29c (the back side of the third body side claw portion 29c), and a fourth leaf spring 41d is provided at a position corresponding to the fourth body side claw portion 29d (the back side of the fourth body side claw portion 29d). In the following description, the above four leaf springs are collectively referred to as the leaf spring 41. The leaf spring 41 presses the following lens side claw portion in the +Z direction (towards the camera body 2 side).

[0069] Figure 6 is a diagram schematically showing the fitting of the interchangeable lens 3 as observed from the side of the camera body 2. The interchangeable lens 3 includes Figure 1 the aforementioned lens side fitting 31 and the lens side terminal holding portion 32 in. The lens side fitting 31 has an annular reference plane with a certain width. When the interchangeable lens 3 is attached to the camera body 2, the annular reference plane of the lens side fitting 31 comes into contact with the annular reference plane of the aforementioned body side fitting 21. Furthermore, the lens side fitting 31 has a cylindrical portion protruding in the optical axis direction on its inner circumference. The lens side fitting 31 has a first lens side claw portion 39a, a second lens side claw portion 39b, a third lens side claw portion 39c, and a fourth lens side claw portion 39d at intervals along the outer circumference of its cylindrical portion. In the following description, the above four claw portions are collectively referred to as the lens side claw portion 39.

[0070] The lens side claw portion 39 is provided in a direction protruding from the outer circumference of the cylindrical portion of the lens side fitting 31 towards the outside of the fitting (in the radial direction from the optical axis O). As Figure 6As shown, the first lens-side claw portion 39a is disposed at the upper left position, the second lens-side claw portion 39b is disposed at the upper right position, the third lens-side claw portion 39c is disposed at the lower right position, and the fourth lens-side claw portion 39d is disposed at the lower left position. Behind the lens-side claw portion 39 (on the reference plane side of the lens-side fitting 31), there is a space for accommodating the corresponding body-side claw portion 29 when the interchangeable lens 3 is attached to the camera body 2.

[0071] Inside the opening of the lens-side fitting 31, a lens-side terminal holding portion 32 is provided. The lens-side terminal holding portion 32 has an arc shape corresponding to the shape of the annular lens-side fitting 31. The lens-side terminal holding portion 32 is disposed in the upper part of the lens-side fitting 31 in parallel with the opening of the lens-side fitting 31, and is preferably disposed at the center of the upper part as Figure 6 shown. As described above, the lens-side terminal holding portion 32 has a plurality of lens-side terminals. In the lens-side terminal holding portion 32, the plurality of lens-side terminals are arranged in a row inside the lens-side fitting 31 and disposed in an arc shape. As Figure 6 shown, the plurality of lens-side terminals are the 11 terminals of LDET(L), VBAT(L), PGND(L), V33(L), GND(L), RDY(L), DATAB(L), CLK(L), DATAL(L), HCLK(L), and HDATA(L) arranged from the right side. The lens-side terminal groups are respectively disposed such that the conductive contact surfaces face the +Z direction ( Figure 1 ). The +Z direction refers to the direction in which the subject light passing through the photographing optical system 36 faces the photographing element 27.

[0072] The lens-side fitting 31 has a lock pin receiving portion 43. As Figure 6 shown, the lock pin receiving portion 43 is disposed at the upper left of the fourth lens-side claw portion 39d. That is, the lock pin receiving portion 43 is disposed between the portion of the lens-side fitting 31 corresponding to the first lens-side claw portion 39a and the portion corresponding to the fourth lens-side claw portion 39d. The lock pin receiving portion 43 is a groove for accommodating the lock pin 42 when the interchangeable lens 3 is attached to the camera body 2. This groove is provided in the -Z direction ( Figure 1 ).

[0073] When the interchangeable lens 3 is attached to the camera body 2, the plurality of body-side terminals are physically contacted with the corresponding plurality of lens-side terminals. Through this contact, the plurality of body-side terminals are electrically connected to the plurality of lens-side terminals. That is, the plurality of body-side terminals are electrically conductive with the plurality of lens-side terminals.

[0074] (Attachment of Interchangeable Lens)

[0075] A method for attaching a replacement lens 3 to the opposed camera body 2 will be described. When installing the replacement lens 3 on the camera body 2, first, the body-side fitting 21 is opposed to the lens-side fitting 31, the first lens-side claw portion 39a is positioned at the position of the first body-side insertion / removal portion 40a, the second lens-side claw portion 39b is positioned at the position of the second body-side insertion / removal portion 40b, the third lens-side claw portion 39c is positioned at the position of the third body-side insertion / removal portion 40c, and the fourth lens-side claw portion 39d is positioned at the position of the fourth body-side insertion / removal portion 40d. Then, the first lens-side claw portion 39a is inserted into the first body-side insertion / removal portion 40a, the second lens-side claw portion 39b is inserted into the second body-side insertion / removal portion 40b, the third lens-side claw portion 39c is inserted into the third body-side insertion / removal portion 40c, and the fourth lens-side claw portion 39d is inserted into the fourth body-side insertion / removal portion 40d. At this time, the LDET(L) terminal contacts the CLK(B) terminal, the VBAT(L) terminal contacts the DATAL(B) terminal, the PGND(L) terminal contacts the HCLK(B) terminal, and the V33(L) terminal contacts the HDATA(B) terminal.

[0076] From this state, the replacement lens 3 is rotated along Figure 5 and Figure 6 the attachment direction 44 shown. That is, the first body-side claw portion 29a enters the space on the back side of the first lens-side claw portion 39a, the second body-side claw portion 29b enters the space on the back side of the second lens-side claw portion 39b, the third body-side claw portion 29c enters the space on the back side of the third lens-side claw portion 39c, and the fourth body-side claw portion 29d enters the space on the back side of the fourth lens-side claw portion 39d. At this time, the plurality of lens-side terminals contact the plurality of body-side terminals in order. In addition, instead of rotating the replacement lens 3, the camera body 2 may be rotated in a direction opposite to Figure 5 and Figure 6 the attachment direction 44 shown.

[0077] When the lens-side claw portion 39 is inserted into the corresponding body-side insertion / removal portion 40 and rotated in the attachment direction 44, for example, the LDET(L) terminal contacts the CLK(B) terminal, DATAB(B) terminal, RDY(B) terminal, GND(B) terminal, V33(B) terminal, PGND(B) terminal, VBAT(B) terminal, and LDET(B) terminal in sequence. For example, the VBAT(L) terminal contacts the DATAL(B) terminal, CLK(B) terminal, DATAB(B) terminal, RDY(B) terminal, GND(B) terminal, V33(B) terminal, PGND(B) terminal, and VBAT(B) terminal in sequence. For example, the PGND(L) terminal contacts the HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, DATAB(B) terminal, RDY(B) terminal, GND(B) terminal, V33(B) terminal, and PGND(B) terminal in sequence. For example, the V33(L) terminal contacts the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, DATAB(B) terminal, RDY(B) terminal, GND(B) terminal, and V33(B) terminal in sequence. For example, the GND(L) terminal contacts the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, DATAB(B) terminal, RDY(B) terminal, and GND(B) terminal in sequence.

[0078] For example, the RDY(L) terminal contacts the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, DATAB(B) terminal, and RDY(B) terminal in sequence. For example, the DATAB(L) terminal contacts the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, and DATAB(B) terminal in sequence. For example, the CLK(L) terminal contacts the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, and CLK(B) terminal in sequence. For example, the DATAL(L) terminal contacts the HDATA(B) terminal, HCLK(B) terminal, and DATAL(B) terminal in sequence. For example, the HCLK(L) terminal contacts the HDATA(B) terminal and HCLK(B) terminal in sequence.

[0079] When the interchangeable lens 3 is rotated by a predetermined angle with respect to the camera body 2, the attachment completion position is reached. At the attachment completion position, the corresponding body-side claw portion 29 and lens-side claw portion 39 face each other in the optical axis direction, and the lock pin 42 is along Figure 1It is pushed in the -Z direction and enters the lock pin receiving portion 43. When the lock pin 42 enters the lock pin receiving portion 43, the interchangeable lens 3 cannot rotate for detachment relative to the camera body 2. That is, when the body side claw portion 29 and the lens side claw portion 39 reach the predetermined attachment completion position, the relative position of the body side fitting 21 and the lens side fitting 31 is fixed. The lens side claw portion 39 is pushed by the leaf spring 41 toward the body side ( Figure 1 in the +Z direction). Thus, each of the plurality of lens side terminals comes into contact with and is electrically connected to each of the corresponding plurality of body side terminals.

[0080] In the following description, the state in which the body side claw portion 29 and the lens side claw portion 39 reach the predetermined attachment completion position is referred to as the attachment completion state. The state during attachment is referred to as follows: the state in the middle of rotating the lens side claw portion 39 from the position inserted into the body side plug-in portion 40 until just before the attachment completion position, or the state in the middle of rotating from just before the attachment completion position until the insertion position.

[0081] In the state during attachment, the signal level of the LDET(B) terminal is pulled up and is at a high level. When the body side control unit 23 detects that the signal level of the LDET(B) terminal is at a high level, it determines that the interchangeable lens 3 is not attached. When the interchangeable lens 3 is not attached, the body side control unit 23 does not cause the power supply unit 26 to supply power to the VBAT(B) terminal and the V33(B) terminal.

[0082] In the attachment completion state, as described above ( Figure 2 ), the signal level of the LDET(B) terminal is pulled down to a low level. When the body side control unit 23 detects that the signal level of the LDET(B) terminal has become low, it determines that the interchangeable lens 3 is attached. In addition, in the attachment completion state, the lock pin 42 enters the lock pin receiving portion 43, and the switch 28 ( Figure 1 ) linked to the lock pin 42 is turned on (conducted). When the body side control unit 23 detects that the signal level of the LDET(B) terminal has become low and the switch 28 is turned on, it causes the power supply unit 26 to start supplying power to the V33(B) terminal. In addition, the camera body 2 may not have to include the switch 28. In the case of not having the switch 28, it is sufficient to cause the power supply unit 26 to start supplying power to the V33(B) terminal at the time point when it is detected that the signal level of the LDET(B) terminal has become low.

[0083] When the power supply to the V33(B) terminal starts, power is supplied to the lens-side control unit 33 of the interchangeable lens 3 through the V33(L) terminal, and the lens-side control unit 33 starts operating. The lens-side control unit 33 that has started operating permits initial communication based on command data communication with the body-side control unit 23. After the lens-side control unit 33 permits the initial communication, the body-side control unit 23 starts the initial communication. The initial communication includes a signal for the lens-side control unit 33 to request power supply to the VBAT(L) terminal. When the signal for requesting power supply to the VBAT(L) terminal is sent from the lens-side control unit 33 to the body-side control unit 23, the body-side control unit 23 supplies power to the VBAT(B) terminal and performs initialization processing between the camera body 2 and the interchangeable lens 3. In the initialization processing, information required for various operations of the camera system 1, such as shooting operations and / or focusing operations, is exchanged between the camera body 2 and the interchangeable lens 3, and the lens position of the interchangeable lens is moved to the reference position.

[0084] In the fully attached state, if the user presses an unlock button (not shown) on the camera body, the lock pin 42 disengages from the lock pin receiving portion 43. As a result, the relative position between the body-side fitting 21 and the lens-side fitting 31 becomes changeable. If the user presses the unlock button (not shown), the switch 28 linked to the unlock button turns off (OFF), and the body-side control unit 23 causes the power supply unit 26 to stop supplying power to the VBAT(B) terminal and the V33(B) terminal. From this state, if the interchangeable lens 3 is rotated in a direction opposite to the attachment direction 44 shown in Figure 5 and Figure 6 the plurality of lens-side terminals come into contact with the plurality of body-side terminals in the reverse order to the above.

[0085] In addition, the power supply can be stopped without being linked to the operation of the unlock button. In this case, when the body-side control unit 23 detects that the LDET(L) terminal and the LDET(B) terminal are separated due to the rotation of the interchangeable lens 3 in a direction opposite to the attachment direction 44 and the signal level of the LDET(B) terminal changes from low level to high level, the body-side control unit 23 causes the power supply unit 26 to stop supplying power to the VBAT(B) terminal and the V33(B) terminal. By doing so, the number of components of the camera system 1 can be reduced. Additionally, the power supply unit 26 can be caused to stop supplying power to the VBAT(B) terminal and the V33(B) terminal when both the detection of the unlock button being pressed and the signal level of the LDET(B) terminal changing from low level to high level are detected. Alternatively, when either the detection of the unlock button being pressed or the signal level of the LDET(B) terminal changing from low level to high level is detected, the body-side control unit 23 can cause the power supply unit 26 to stop supplying power to the VBAT(B) terminal and the V33(B) terminal.

[0086] As described above, during the process of attaching a replacement lens to the camera body and during the process of detaching the replacement lens from the camera body (in the attachment state), the lens-side terminals come into contact with the body-side terminals other than the terminals that should be corresponding at the completion of attachment. Regarding the arrangement of the lens-side terminals and the body-side terminals, an arrangement that results in fewer malfunctions (failures) due to the contact during the attachment process and the detachment process is preferred.

[0087] (Terminal arrangement considering noise)

[0088] In the present embodiment, the LDET(B) terminal among the plurality of body-side terminals is arranged at the foremost end in the lens attachment direction ( Figure 5 arrow 44 in (a)). That is, the arrangement position of the LDET(B) terminal is as described above at Figure 5 the leftmost side of the body-side terminal group in (a). Similarly, the LDET(L) terminal among the plurality of lens-side terminals is also arranged at the foremost end in the lens attachment direction ( Figure 6 arrow 44). That is, the arrangement position of the LDET(L) terminal is as described above at Figure 6 the rightmost side of the lens-side terminal group in. Therefore, until the attachment of the replacement lens is completed, the LDET(B) terminal does not come into contact with the lens-side terminals other than the LDET(L) terminal. Thus, during the attachment process of the replacement lens, the signal level of the LDET(B) terminal does not erroneously become low, and the lens attachment is not erroneously recognized.

[0089] In the present embodiment, the VBAT(B) terminal is arranged next to the LDET(B) terminal, that is, the second position from the foremost end in the attachment direction. The VBAT(L) terminal is arranged next to the LDET(L) terminal, that is, the second position from the foremost end in the attachment direction. This is to reduce the lens-side terminals that the VBAT(B) terminal on the camera body side comes into contact with during the attachment process of the lens. Since the voltage applied to the VBAT(B) terminal is a high voltage higher than other terminals, if the VBAT(B) terminal comes into contact with terminals other than the VBAT(L) terminal in a situation where a high voltage is erroneously applied to the VBAT(B) terminal due to a failure of the camera system 1 or the like, it may cause an unexpected burden on the electrical circuit in the replacement lens. In the present embodiment, since the VBAT(B) terminal is located next to the LDET(B) terminal, during the attachment of the replacement lens 3, only the LDET(L) terminal among the plurality of lens-side terminals comes into contact with the VBAT(B) terminal. As Figure 2 shown, the LDET(L) terminal is grounded via the resistor R3, and even if a high voltage is applied by the VBAT(B) terminal by any chance, it will not affect the camera system 1.

[0090] In this embodiment, the PGND(B) terminal is arranged at the third position from the foremost end in the mounting direction, beside the VBAT(B) terminal. The PGND(L) terminal is arranged at the third position from the foremost end in the mounting direction, beside the VBAT(L) terminal. High-voltage charges supplied from the VBAT(B) terminal are stored in the capacitor C1 connected to the VBAT(L) terminal. When the interchangeable lens 3 is rotated in the removal direction, the VBAT(L) terminal first contacts the PGND(B) terminal. The charges stored in the capacitor C1 are immediately discharged from the PGND(B) terminal, which serves as a ground terminal, without affecting other circuits of the camera system 1.

[0091] In this embodiment, the V33(B) terminal is arranged at the fourth position from the foremost end in the mounting direction, beside the PGND(B) terminal, and the GND(B) terminal is arranged at the fifth position from the foremost end, beside it. The V33(L) terminal is arranged at the fourth position from the foremost end in the mounting direction, beside the PGND(L) terminal, and the GND(L) terminal is arranged at the fifth position from the foremost end, beside it. Charges of the voltage supplied from the V33(B) terminal are stored in the capacitor C2 connected to the V33(L) terminal. When the interchangeable lens 3 is rotated in the removal direction, the V33(L) terminal first contacts the GND(B) terminal. The charges stored in the capacitor C2 are immediately discharged from the GND(B) terminal, which serves as a ground terminal, without affecting other circuits of the camera system 1.

[0092] The RDY(B) terminal is arranged at the sixth position from the foremost end, beside the GND(B) terminal, the DATAB(B) terminal is arranged at the seventh position from the foremost end, beside it, the CLK(B) terminal is arranged at the eighth position from the foremost end, beside it, the DATAL(B) terminal is arranged at the ninth position from the foremost end, beside it, the HCLK(B) terminal is further arranged at the tenth position from the foremost end, beside it, and the HDATA(B) terminal is arranged at the rearmost end, beside it.

[0093] The RDY(L) terminal is arranged at the sixth position from the foremost end, beside the GND(L) terminal, the DATAB(L) terminal is arranged at the seventh position from the foremost end, beside it, the CLK(L) terminal is arranged at the eighth position from the foremost end, beside it, the DATAL(L) terminal is arranged at the ninth position from the foremost end, beside it, the HCLK(L) terminal is further arranged at the tenth position from the foremost end, beside it, and the HDATA(L) terminal is arranged at the rearmost end, beside it.

[0094] Next, the noise impact caused by the communication line formed by each body-side terminal and each lens-side terminal will be described. Hotline communication is a communication that unidirectionally sends information to the body after the start of communication and is performed at a high frequency (repeated at a very short cycle). During hotline communication, a clock signal is sent from the HCLK(L) terminal to the HCLK(B) terminal. The clock signal is a signal that repeats high and low levels in a short cycle, so it may become a large noise source for other signals. Moreover, the clock signal sent from the HCLK(L) terminal to the HCLK(B) terminal is a signal output from the interchangeable lens 3. Therefore, even if noise is accidentally attached to this clock signal, the camera body 2 side cannot recognize the noise. Thus, the signal flowing through the HCLK terminal may also become a noise source for the camera body 2, leading to a cause of malfunction of the camera system 1. As examples of malfunctions, false detection of the attachment of the interchangeable lens and / or misjudgment of whether command communication can be performed can be cited. In the present embodiment, the HCLK terminal is arranged at a position far from the VBAT terminal to which a high voltage is applied. In addition, the HCLK terminal and the RDY terminal used to indicate whether command communication can be performed are separately arranged so as not to be adjacent to each other.

[0095] In addition, the HDATA terminal and the DATAL terminal are arranged adjacent to the left and right of the HCLK terminal. By doing so, the influence of the noise of the HCLK terminal on other than the HDATA terminal and the DATAL terminal can be suppressed.

[0096] Next, as described above, command data communication is a communication that bidirectionally transmits and receives information between the body and the interchangeable lens. During command data communication, a clock signal is sent from the CLK(B) terminal to the CLK(L) terminal. The clock signal sent through the CLK terminal may also become a noise source for the same reason as described above. Therefore, in the present embodiment, the CLK terminal is arranged at a position far from the VBAT terminal to which a high voltage is applied. In addition, the CLK terminal and the RDY terminal used to indicate whether command communication can be performed are separately arranged so as not to be adjacent to each other. In addition, if the HCLK terminal and the CLK terminal are adjacent to each other, one clock signal will affect the other clock signal and may become a noise source. In the present embodiment, the DATAL terminal is arranged between the CLK terminal and the HCLK terminal. In addition, the DATAB terminal is arranged between the CLK terminal and the RDY terminal. That is, the DATAL terminal and the DATAB terminal are arranged on both sides of the CLK terminal. Because of this, the influence of the noise caused by the CLK terminal on the camera system can be suppressed.

[0097] In addition, as described above, it is necessary to determine the level of the RDY terminal for command data communication. That is, the signal level of the RDY terminal indicates whether command data communication can be performed, so the influence of noise on the shooting operation is relatively large. Here, consider a situation where, although it is a state where command data communication cannot be performed, the body-side control unit 23 misidentifies it as a state where communication is possible due to noise. In this case, the lens-side control unit 33 cannot receive the command data, but the body-side control unit 23 will send the command data, and the body-side control unit 23 misidentifies that control in accordance with the command data will be performed during lens replacement. However, since the lens-side control unit 33 does not accept the command data, it will not perform control in accordance with the erroneously sent command data. Therefore, the operation of the camera system 1 will be hindered. For this reason, it is necessary to prevent noise from being added to the signal of the RDY terminal. In order to prevent noise from being added to the signal of the RDY terminal, it is preferable to arrange terminals that conduct a relatively stable signal, that is, a signal with less change in signal level per unit time, adjacent to the left and right of the RDY terminal. In the present embodiment, a GND terminal and a DATAB terminal are arranged adjacent to the left and right of the RDY terminal. The GND terminal is a terminal with a ground potential, so it is stable, and the DATAB terminal is also a terminal that conducts a relatively stable signal compared to the CLK terminal and / or the HCLK terminal. Because of this, the influence of noise on the signal of the RDY terminal can be suppressed.

[0098] Next, the power supplied from the VBAT(B) terminal to the VBAT(L) terminal is used to drive an actuator (such as a stepping motor, etc.) of the drive unit 37 of the interchangeable lens 3. Therefore, the current flowing through the VBAT terminal changes greatly when the actuator is driven and when it is not driven. This change in current becomes a noise source for the signals flowing through other terminals. In the present embodiment, the VBAT terminal is arranged at a position far from the RDY terminal, DATAB terminal, CLK terminal, DATAL terminal used for command data communication, and the HCLK terminal and HDATA terminal used for hotline communication. Furthermore, a GND terminal, a V33 terminal, and a PGND terminal are arranged between the VBAT terminal and the terminals used for these communications. Thereby, the influence of noise caused by the change in the current flowing through the VBAT terminal on data communication can be suppressed.

[0099] Here, the terminal arrangement considering noise described above is summarized.

[0100] The RDY terminal is arranged separately from both the VBAT terminal and the HCLK terminal that are noise sources so as not to be adjacent. Thereby, the influence of noise on the RDY terminal used to indicate whether command communication is possible can be suppressed.

[0101] The HCLK terminal that will become a noise source is placed between the HDATA terminal and the DATAL terminal, and the CLK terminal is placed between the DATAL terminal and the DATAB terminal. That is, the HDATA terminal, the HCLK terminal, the DATAL terminal, the CLK terminal, and the DATAB terminal are arranged in sequence from the rear end in the mounting direction. Thereby, the influence of noise caused by the clock signal on terminals such as the RDY terminal can be suppressed.

[0102] Furthermore, considering the influence of noise, the terminal group for power supply and the terminal group for communication are separately arranged with the RDY terminal in between. Specifically, with the RDY terminal in between, the VBAT terminal, the PGND terminal, the V33 terminal, and the GND terminal, which are terminals for power supply, are arranged in sequence from the front end on the front end side in the mounting direction, and the DATAB terminal, the CLK terminal, the DATAL terminal, the HCLK terminal, and the HDATA terminal, which are terminals for communication, are arranged in sequence from the front end on the rear end side in the mounting direction. Thereby, the influence of noise from the power supply system terminal group such as the VBAT terminal and the terminal group for communication such as the HCLK terminal and the CLK terminal on the RDY terminal can be suppressed.

[0103] Regarding the HCLK terminal that transmits the clock signal used in hotline communication and the CLK terminal that transmits the clock signal used in command data communication, the HCLK terminal is arranged at a position farther from the VBAT terminal than the CLK terminal. The reason is that the clock signal transmitted by the CLK terminal to the interchangeable lens is output by the body side control unit 23 via the body side communication unit 24, and if noise is added to the clock signal transmitted from the interchangeable lens via the lens side communication unit 34 and sent to the camera body through the HCLK(L) terminal, the body side control unit 23 will misidentify it. Therefore, the influence of the noise of the clock signal added to the HCLK terminal on the camera system 1 is greater.

[0104] Regarding the HCLK terminal and the GND terminal, the HCLK terminal is arranged at a position farther from the VBAT terminal than the GND terminal. Furthermore, the PGND terminal is arranged between the GND terminal and the VBAT terminal. Thereby, the noise of the VBAT terminal on the HCLK terminal that transmits the clock signal used in hotline communication can be shielded.

[0105] Regarding the CLK terminal and the GND terminal, the CLK terminal is arranged at a position farther from the VBAT terminal than the GND terminal. Furthermore, the PGND terminal is arranged between the GND terminal and the VBAT terminal. Thereby, the noise of the VBAT terminal on the CLK terminal that transmits the clock signal used in command data communication can be shielded.

[0106] (Terminal arrangement considering wear)

[0107] Hereinafter, the contact of each terminal when the lens 3 is disassembled and assembled to / from the camera body 2 will be described.

[0108] When the replacement lens 3 is attached to the camera body 2, the body-side terminals and the lens-side terminals come into contact with each other one by one. The same applies when the replacement lens 3 is removed from the camera body 2. That is, the pins protruding from the body-side terminal holding portion 22, i.e., the body-side terminals, and the exposed conductive contact surfaces, i.e., the lens-side terminals, are rubbed against each other one by one. Since multiple replacement lenses are disassembled and assembled to / from one camera body, the body-side terminals are more likely to be worn than the lens-side terminals. In particular, the body-side terminals located on the rear end side in the attachment direction of the replacement lens 3 come into contact with more lens-side terminals and experience more friction. Therefore, the front ends of the pins of the body-side terminals located on the rear end side are more likely to be worn than those of the body-side terminals located on the front end side. The wear of the body-side terminals affects the contact with the lens-side terminals, so it may cause unstable data communication.

[0109] In the present embodiment, the LDET(B) terminal is arranged at the foremost end in the attachment direction, so the wear of the LDET(B) terminal is the least. As a result, the LDET(B) terminal and the LDET(L) terminal are in good contact, and the possibility of erroneously detecting the disassembly and assembly of the replacement lens 3 is small.

[0110] As described above, in the present embodiment, in order to suppress the influence of noise on communication, the CLK(B) terminal and the HCLK(B) terminal are arranged at positions away from the VBAT(B) terminal. That is, the VBAT(B) terminal is arranged at the second position from the front end side in the attachment direction, and the CLK(B) terminal and the HCLK(B) terminal are arranged at the rear end side away from the VBAT(B) terminal. Therefore, the CLK(B) terminal and the HCLK(B) terminal are worn more than the LDET(B) terminal and the VBAT(B) terminal. In the present embodiment, the CLK(B) terminal and the HCLK(B) terminal are arranged closely adjacent to the body-side first claw portion 29a. That is, the CLK(B) terminal and the HCLK(B) terminal are arranged at positions closer to the inner periphery of the body-side first claw portion 29a than the VBAT(B) terminal. In other words, the distance between the CLK(B) terminal and the inner periphery of the body-side first claw portion 29a is shorter than the distance between the VBAT(B) terminal and the inner periphery of the body-side first claw portion 29a, and the distance between the HCLK(B) terminal and the inner periphery of the body-side first claw portion 29a is shorter than the distance between the VBAT(B) terminal and the inner periphery of the body-side first claw portion 29a. As described above, the first leaf spring 41a is provided on the back side of the body-side first claw portion 29a, and the lens-side first claw portion 39a is moved in the +Z direction by the first leaf spring 41a ( Figure 1)Pressing. From the perspective of the first leaf spring 41a, the distances between the CLK(B) terminal and the first leaf spring 41a, and between the HCLK(B) terminal and the first leaf spring 41a are also shorter than the distance between the VBAT(B) terminal and the first leaf spring 41a. In addition, for the LDET(B) terminal as well as the VBAT(B) terminal, the distances between the CLK(B) terminal and the first leaf spring 41a, and between the HCLK(B) terminal and the first leaf spring 41a are shorter than the distance between the LDET(B) terminal and the first leaf spring 41a. Because of this, the CLK(B) terminal and the HCLK(B) terminal are pressed more strongly against the lens-side terminals than the VBAT(B) terminal and the LDET(B) terminal.

[0111] On the lens side, the CLK(L) terminal and the HCLK(L) terminal are also arranged at positions closer to the inner periphery of the first claw portion 39a of the lens than the VBAT(L) terminal. In other words, the distance between the CLK(L) terminal and the inner periphery of the first claw portion 39a of the lens is shorter than the distance between the VBAT(L) terminal and the inner periphery of the first claw portion 39a of the lens, and the distance between the HCLK(L) terminal and the inner periphery of the first claw portion 39a of the lens is shorter than the distance between the VBAT(L) terminal and the inner periphery of the first claw portion 39a of the lens. Therefore, the CLK(L) terminal and the HCLK(L) terminal located beside the first claw portion 39a of the lens are respectively pressed against the corresponding body-side terminals by the first leaf spring 41a in the assembled state. In addition, for the LDET(L) terminal as well as the VBAT(L) terminal, in the assembled state, the distances between the CLK(L) terminal and the first leaf spring 41a, and between the HCLK(L) terminal and the first leaf spring 41a are shorter than the distance between the LDET(L) terminal and the first leaf spring 41a. Because of this, the CLK(L) terminal and the HCLK(L) terminal are pressed against the body-side terminals with a stronger force than the LDET(L) terminal in the assembled state. As a result, even if the CLK(B) terminal and / or the HCLK(B) terminal are worn, good contact can be maintained, and the clock signal is stable, enabling stable data communication. In addition, for example, even if an impact is applied to the camera body 2 and / or the interchangeable lens 3 while maintaining the assembled state unchanged, the contact between the CLK(B) terminal and the CLK(L) terminal and the contact between the HCLK(B) terminal and the HCLK(L) terminal remain unchanged.

[0112] Assume that even when a part of the first claw portion 39a on the lens side is grooved, the entire part including the protruding portion and the grooved portion arranged in the area facing the first claw portion 29a on the body side is defined as the first claw portion on the lens side. As a grooving method, the lens-side claw portion can be grooved in a manner of being divided into two or more parts in the circumferential direction, or can be grooved in a manner of cutting off a part of the lens-side claw portion, or can be grooved in a manner of shortening the radial length of at least a part of the lens-side claw portion. In addition, the circumferential length of the lens-side claw portion can also be changed within the range of the corresponding body-side insertion and extraction portion. The same applies to the second claw portion 39b, the third claw portion 39c, and the fourth claw portion 39d on the lens side. In addition, the radial thickness of the cylindrical portion can be appropriately changed, and it can also be in a shape in which at least a part protrudes inward from the cylindrical portion of the present embodiment.

[0113] As described above, the CLK(B) terminal and the HCLK(B) terminal are more worn than the LDET(B) terminal and the VBAT(B) terminal. In the present embodiment, the CLK(B) terminal and the HCLK(B) terminal are arranged immediately adjacent to the first claw portion 29a on the body side. That is, the CLK(B) terminal and the HCLK(B) terminal are arranged at a position closer to the inner peripheral edge of the first claw portion 29a on the body side than the LDET(B) terminal and / or the VBAT(B) terminal. In other words, the distance between the CLK(B) terminal and the inner peripheral edge of the first claw portion 29a on the body side is shorter than the distance between the LDET(B) terminal and / or the VBAT(B) terminal and the inner peripheral edge of the first claw portion 29a on the body side. In addition, the distance between the HCLK(B) terminal and the inner peripheral edge of the first claw portion 29a on the body side is shorter than the distance between the LDET(B) terminal and / or the VBAT(B) terminal and the inner peripheral edge of the first claw portion 29a on the body side. As described above, the first leaf spring 41a is provided on the back side of the first claw portion 29a on the body side, and the first claw portion 39a on the lens side is pressed in the +Z direction ( Figure 1 ) by the first leaf spring 41a. From the perspective of the first leaf spring 41a, the distances between the CLK(B) terminal and the first leaf spring 41a and between the HCLK(B) terminal and the first leaf spring 41a are also shorter than the distances between the LDET(B) terminal and / or the VBAT(B) terminal and the first leaf spring 41a.

[0114] On the lens side, the CLK(L) terminal and the HCLK(L) terminal are also arranged at positions closer to the inner periphery of the first lens-side claw portion 39a than the LDET(L) terminal and / or the VBAT(L) terminal. In other words, the distance between the CLK(L) terminal and the inner periphery of the first lens-side claw portion 39a is shorter than the distance between the LDET(L) terminal and / or the VBAT(L) terminal and the inner periphery of the first lens-side claw portion 39a. Additionally, the distance between the HCLK(L) terminal and the inner periphery of the first lens-side claw portion 39a is shorter than the distance between the LDET(L) terminal and / or the VBAT(L) terminal and the inner periphery of the first lens-side claw portion 39a. Therefore, the CLK(L) terminal and the HCLK(L) terminal located beside the first lens-side claw portion 39a are respectively pressed against the corresponding body-side terminals by the first leaf spring 41a. Because of this, the CLK(B) terminal and the HCLK(B) terminal are pressed against the lens-side terminals more strongly than the LDET(B) terminal and / or the VBAT(B) terminal. Thereby, even if the CLK(B) terminal and / or the HCLK(B) terminal are worn, good contact can be maintained and stable communication can be carried out. Additionally, for example, even if an impact is applied to the camera body 2 and / or the interchangeable lens 3 while maintaining the attached state unchanged, the contact between the CLK(B) terminal and the HCLK(B) terminal and the lens-side terminals remains unchanged.

[0115] In the present embodiment, the CLK(B) terminal and the HCLK(B) terminal are also close to the fourth body-side claw portion 29d. That is, the CLK(B) terminal and the HCLK(B) terminal are arranged at positions closer to the fourth body-side claw portion 29d than the VBAT(B) terminal and / or the LDET(B) terminal. In other words, the distance between the CLK(B) terminal and the fourth body-side claw portion 29d is shorter than the distance between the VBAT(B) terminal or the LDET(B) terminal and the fourth body-side claw portion 29d. Additionally, the distance between the HCLK(B) terminal and the fourth body-side claw portion 29d is shorter than the distance between the VBAT(B) terminal or the LDET(B) terminal and the fourth body-side claw portion 29d. As described above, a fourth leaf spring 41d is provided on the back side of the fourth body-side claw portion 29d, and the fourth lens-side claw portion 39d is pressed in the +Z direction ( Figure 1 ) by the fourth leaf spring 41d. Therefore, the CLK(B) terminal and the HCLK(B) terminal located near the fourth lens-side claw portion 39d are pressed against the lens-side terminals more stably and more strongly than the VBAT(B) terminal and / or the LDET(B) terminal by the fourth leaf spring 41d.

[0116] The distance between the aforementioned CLK(B) terminal and the first body-side claw portion 29a (the same applies to the fourth body-side claw portion 29d, and the following description will omit this) refers to the straight-line distance between one end of the first body-side claw portion 29a and the CLK(B) terminal, and can also be defined by the straight-line distance between the other end of the first body-side claw portion 29a and the CLK(B) terminal. Alternatively, the distance between the aforementioned CLK(B) terminal and the first body-side claw portion 29a can also be defined by the straight-line distance between the middle position of the first body-side claw portion 29a in the circumferential direction of the body-side fitting 21 and the CLK(B) terminal. The distances between other body-side terminals such as the HCLK(B) terminal, VBAT(B) terminal, and LDET(B) terminal and the first body-side claw portion 29a are also straight-line distances. The distances between the first leaf spring 41a (the fourth leaf spring 41d) and the body-side terminals are also straight-line distances.

[0117] In addition, the distance between the aforementioned CLK(B) terminal and the first body-side claw portion 29a (the same applies to the fourth body-side claw portion 29d, and the following description will omit this) can be defined as the arc-shaped distance between one end of the first body-side claw portion 29a in the circumferential direction of the body-side fitting 21 and the CLK(B) terminal, or can be defined as the arc-shaped distance between the other end of the first body-side claw portion 29a and the CLK(B) terminal. Alternatively, the distance between the aforementioned CLK(B) terminal and the first body-side claw portion 29a can also be defined as the arc-shaped distance between the middle position of the first body-side claw portion 29a in the circumferential direction of the body-side fitting 21 and the CLK(B) terminal. The distances between other body-side terminals such as the HCLK(B) terminal, VBAT(B) terminal, and / or LDET(B) terminal and the first body-side claw portion 29a are also arc-shaped distances. The distances between the first leaf spring 41a (the fourth leaf spring 41d) and the body-side terminals are also arc-shaped distances.

[0118] The above describes the camera body 2, and the same applies to the interchangeable lens 3. In the present embodiment, the CLK(L) terminal and the HCLK(L) terminal are arranged closely adjacent to the first lens-side claw portion 39a. That is, the CLK(L) terminal and the HCLK(L) terminal are arranged at a position closer to the first lens-side claw portion 39a than the VBAT(L) terminal and the LDET(L) terminal. In other words, the distance between the CLK(L) terminal and the first lens-side claw portion 39a is shorter than the distance between the VBAT(L) terminal or the LDET(L) terminal and the first lens-side claw portion 39a. Additionally, the distance between the HCLK(L) terminal and the first lens-side claw portion 39a is shorter than the distance between the VBAT(L) terminal or the LDET(L) terminal and the first lens-side claw portion 39a. The first lens-side claw portion 39a is pressed by the first leaf spring 41a on the body side in the +Z direction ( Figure 1)Press. Therefore, similarly to the above, the CLK(L) terminal and the HCLK(L) terminal near the first claw portion 39a on the lens side are pressed against the body-side terminal more strongly than the VBAT(L) terminal or the LDET(L) terminal by the first leaf spring 41a.

[0119] In the present embodiment, as Figure 5 shown in (a) of, the CLK(B) terminal and the HCLK(B) terminal are arranged inside the sector (range of an angle of 50°) formed by the center position of the opening of the fitting 21 (i.e., the position of the optical axis O of the interchangeable lens 3) and the arc-shaped body-side first claw portion 29a. Alternatively, the CLK(B) terminal and the HCLK(B) terminal are arranged inside the triangular region formed by the center position of the opening of the fitting 21 (i.e., the position of the optical axis O of the interchangeable lens 3) and both ends on the inner peripheral side of the body-side first claw portion 29a. Therefore, there is no body-side first claw portion 29a on the extension line of the dotted line 51 connecting the center position of the opening of the fitting 21 and the LDET(B) terminal, while there is a body-side first claw portion 29a on the extension line of the dotted line 52 connecting the center position of the opening of the fitting 21 and the HCLK(B) terminal, and there is a body-side first claw portion 29a on the extension line of the dotted line 53 connecting the center position of the opening of the fitting 21 and the CLK(B) terminal. Thus, in the fully attached state, the CLK(B) terminal and the HCLK(B) terminal are pressed against the corresponding lens-side terminals more strongly than the LDET(B) terminal.

[0120] As Figure 6As shown, the CLK(L) terminal and the HCLK(L) terminal are arranged inside the sector (range of an angle of 60°) formed by the center position of the opening of the fitting 31 (i.e., the position of the optical axis O of the interchangeable lens 3) and the arc-shaped lens-side first claw portion 39a. Alternatively, the CLK(L) terminal and the HCLK(L) terminal are arranged inside the triangular region formed by the center position of the opening of the fitting 31 (i.e., the position of the optical axis O of the interchangeable lens 3) and both ends on the outer peripheral side of the lens-side first claw portion 39a. Therefore, there is no lens-side first claw portion 39a on the extension line of the dotted line 61 connecting the center position of the opening of the fitting 31 and the LDET(L) terminal, while there is a lens-side first claw portion 39a on the extension line of the dotted line 62 connecting the center position of the opening of the fitting 31 and the HCLK(L) terminal, and there is a lens-side first claw portion 39a on the extension line of the dotted line 63 connecting the center position of the opening of the fitting 31 and the CLK(L) terminal. Thus, in the attached state, the CLK(L) terminal and the HCLK(L) terminal are in contact with the corresponding body-side terminals more stably than the LDET(L) terminal. In other words, the CLK(L) terminal and the HCLK(L) terminal are pressed against the body-side terminals under a stronger force than the LDET(L) terminal. Therefore, even when the tips of the CLK(B) terminal and the HCLK(B) terminal are worn, the camera body 2 and the interchangeable lens 3 can stably communicate clock signals.

[0121] The following modifications can also be made, and one or more modification examples can also be combined with the above-described embodiment.

[0122] (Modification Example 1)

[0123] It is also possible to make a certain terminal used in command data communication or hotline communication also have the function of sending a power-on (ON) signal from the interchangeable lens 3 to the camera body 2. For example, a power switch function is provided for the interchangeable lens 3. When the interchangeable lens 3 is in the attached state and the camera system 1 is in the power-off state, the power supply unit 26 also supplies power from the V33(B) terminal to the lens-side control unit 33 of the interchangeable lens 3. When the power switch of the interchangeable lens 3 is operated, the lens-side control unit 33 outputs a power-on signal to the RDY(L) terminal via the lens-side communication unit 34, for example. If the body-side control unit 23 detects the power-on signal via the body-side communication unit 24 and using the RDY(B) terminal, the camera system 1 is changed from the power-off state to the power-on state in the same manner as when the power switch (not shown) provided on the camera body 2 is operated.

[0124] (Modification Example 2)

[0125] In the embodiment, the DATAB(B) terminal is arranged on the front end side in the attachment direction of the CLK(B) terminal, and the DATAL(B) terminal is arranged on the rear end side. However, the positions of the DATAB(B) terminal and the DATAL(B) terminal can be swapped. That is, the DATAL(B) terminal, the CLK(B) terminal, and the DATAB(B) terminal can also be arranged in sequence from the front end side in the attachment direction.

[0126] In addition, in the above embodiment, a replacement lens of a camera is cited as an example of the accessory for illustration, but the accessory is not limited to the replacement lens. For example, it can also be a teleconverter and / or a wide converter that changes the focal length of the replacement lens, an extension tube, etc., which are attached between the camera body and the replacement lens. Or, it can also be applied to an assembly adapter that enables an accessory including a replacement lens conforming to other fitting standards to be attached to the above camera body. That is, as long as it is an accessory used for attachment to the fitting on the camera body, it can be similarly applied. In this case, the lens-side terminal group, the lens-side claw portion 39, the lens-side communication portion 34, etc. correspond to the accessory-side terminal group, the accessory-side protruding portion, the accessory-side communication portion, etc. of each accessory.

[0127] In the above embodiment, the accessory is configured to be detachable from and attachable to the camera body. However, the above camera body can also be an assembly adapter that enables a replacement lens conforming to the above fitting standard to be attached to a camera body conforming to a different fitting standard, and can also be configured to enable the above accessory to be attached to the assembly adapter.

Claims

1. An accessory is an accessory installed on a camera body. The camera body has a camera-side first clock terminal that outputs a first clock signal, a camera-side first data terminal that outputs a first data signal, and a camera-side third data terminal that is input with a third data signal. The accessory includes: An eighth terminal that contacts the camera-side first clock terminal; A seventh terminal that contacts the camera-side first data terminal; and A ninth terminal that contacts the camera-side third data terminal. The eighth terminal is disposed between the seventh terminal and the ninth terminal.

2. The accessory according to claim 1, The seventh terminal is disposed beside the eighth terminal.

3. The accessory according to claim 1, The ninth terminal is disposed beside the eighth terminal.

4. The accessory according to claim 1, The eighth terminal and the ninth terminal are sequentially disposed starting from the seventh terminal.

5. An accessory is an accessory installed on a camera body. The camera body has a camera-side second clock terminal that is input with a second clock signal, a camera-side third data terminal that is input with a third data signal, and a camera-side second data terminal that is input with a second data signal. The accessory includes: A ninth terminal that contacts the camera-side third data terminal; A tenth terminal that contacts the camera-side second clock terminal; and An eleventh terminal that contacts the camera-side second data terminal. The tenth terminal is disposed between the ninth terminal and the eleventh terminal.

6. The accessory according to claim 5, The ninth terminal is disposed beside the tenth terminal.

7. The accessory according to claim 5, The eleventh terminal is disposed beside the tenth terminal.

8. The accessory according to claim 5, The tenth terminal and the eleventh terminal are sequentially disposed starting from the ninth terminal.

9. An accessory is an accessory installed on a camera body. The camera body has a camera-side first clock terminal that outputs a first clock signal, a camera-side first data terminal that outputs a first data signal, a camera-side third data terminal that is input with a third data signal, a camera-side second clock terminal that is input with a second clock signal, and a camera-side second data terminal that is input with a second data signal. The accessory includes: A seventh terminal that contacts the camera-side first data terminal; An eighth terminal that contacts the camera-side first clock terminal; A ninth terminal that contacts the camera-side third data terminal; A tenth terminal that contacts the camera-side second clock terminal; and An eleventh terminal that contacts the camera-side second data terminal. The eighth terminal is disposed between the seventh terminal and the ninth terminal, and the tenth terminal is disposed between the ninth terminal and the eleventh terminal.

10. An accessory is an accessory installed on a camera body and includes: A seventh terminal that inputs a first data signal from the camera body; An eighth terminal that inputs a first clock signal from the camera body; A ninth terminal that outputs a third data signal to the camera body. The 10th terminal outputs a second clock signal to the camera body; and The 11th terminal outputs a second data signal to the camera body, The 8th terminal is disposed between the 7th terminal and the 9th terminal, and the 10th terminal is disposed between the 9th terminal and the 11th terminal.

11. The accessory according to claim 9 or 10, The 7th terminal is disposed beside the 8th terminal.

12. The accessory according to claim 9 or 10, The 9th terminal is disposed beside the 8th terminal.

13. The accessory according to claim 9 or 10, The 9th terminal is disposed beside the 10th terminal.

14. The accessory according to claim 9 or 10, The 11th terminal is disposed beside the 10th terminal.

15. The accessory according to claim 9 or 10, The 8th terminal and the 9th terminal are sequentially disposed starting from the 7th terminal.

16. The accessory according to claim 9 or 10, The 10th terminal and the 11th terminal are sequentially disposed starting from the 9th terminal.

17. The accessory according to claim 9 or 10, The 8th terminal, the 9th terminal, the 10th terminal, and the 11th terminal are sequentially disposed starting from the 7th terminal.

18. The accessory according to any one of claims 1 to 17, The accessory is a replacement lens.

Images