Fitting

Abstract

The invention provides an accessory capable of stably communicating with a camera body. The accessory is mounted on a camera body, the camera body is provided with a plurality of camera-side terminals, a camera-side protruding part protruding towards the center of an opening of a lens mounting part, and an elastic component arranged at a position corresponding to the camera-side protruding part, and the accessory is provided with a first terminal which is in contact with a camera-side first terminal of the plurality of camera-side terminals, and a second terminal which is in contact with a camera-side second terminal of the plurality of camera-side terminals. The voltage of the camera-side first terminal is changed by contacting with the camera-side first terminal. An eighth terminal which is in contact with a camera-side first clock terminal and into which a first clock signal used for transmitting a first data signal from the camera body to the accessory is input; a tenth terminal that comes into contact with a camera-side second clock terminal and outputs a second clock signal used for transmitting a second data signal from the accessory to the camera body; and an accessory-side protruding portion that is pressed toward the camera body side by the elastic member, and the eighth and tenth terminals are disposed at positions at which the distance from the accessory-side protruding portion is shorter than the distance from the first terminal to the accessory-side protruding portion.

Description

[0001] This application is a divisional application of patent application No. 201811252458.0, filed on October 25, 2018, entitled "Accessories". Technical Field

[0002] This invention relates to accessories. Background Technology

[0003] Accessories that can be detached from and attached to a camera body are known (e.g., Patent Document 1). Historically, it has been necessary to attach accessories to the camera body in a usable manner.

[0004] Existing technical documents

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

[0006] According to the first technical solution, the accessory is an accessory installed on a camera body. The camera body has multiple camera-side terminals, a camera-side protrusion protruding towards the center of an opening in a lens mounting portion, and an elastic member disposed at a position corresponding to the camera-side protrusion. The accessory includes: a first terminal, which is a terminal that contacts a camera-side first terminal among the multiple camera-side terminals, and changes the voltage of the camera-side first terminal by contacting the camera-side first terminal; an eighth terminal, which is a terminal that contacts a camera-side first clock terminal among the multiple camera-side terminals, and is input with a first clock signal used in transmitting a first data signal from the camera body to the accessory; a tenth terminal, which is a terminal that contacts a camera-side second clock terminal among the multiple camera-side terminals, and outputs a second clock signal used in transmitting a second data signal from the accessory to the camera body; and an accessory-side protrusion, which is pushed toward the camera body by the elastic member. The eighth terminal and the tenth terminal are disposed at a position where the distance to the accessory-side protrusion is shorter than the distance between the first terminal and the accessory-side protrusion. Attached Figure Description

[0007] Figure 1 It is a diagram that schematically illustrates the configuration of a camera system.

[0008] Figure 2 It is a circuit diagram that schematically shows the electrical connection between the camera body and the interchangeable lens.

[0009] Figure 3 This is a timing chart representing an example of command data communication.

[0010] Figure 4 This is a timeline representing an example of hotline communication.

[0011] Figure 5 It is a schematic front view showing the mounting (adapter) surface of the camera body as seen from the lens-changing side.

[0012] Figure 6 It is a schematic front view showing the mounting surface of the interchangeable lens as seen from the side of the camera body.

[0013] Label Explanation

[0014] 1 Camera system; 2 Camera body; 3 Replacement lens; 21 Body side mount; 22 Body side terminal holder; 31 Lens side mount; 32 Lens side terminal holder. Detailed Implementation

[0015] (First Embodiment)

[0016] Figure 1 This diagram illustrates the general configuration of the camera system 1 according to the first embodiment. The camera system 1 includes a camera body 2 and an interchangeable lens 3, the interchangeable lens 3 being an example of an accessory that can be detached from the camera body 2 and installed onto the camera body 2.

[0017] The interchangeable lens 3 includes a lens-side mounting part 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 shooting (video recording) optical system 36, and a drive part 37. The lens-side mounting part 31 and the lens-side terminal holding part 32 will be explained in detail later.

[0018] The lens-side control unit 33 comprises a microcomputer and its peripheral circuitry. The lens-side communication unit 34 performs data communication with the camera body 2 (described later). The lens-side communication unit 34 is connected to the lens-side terminal group (described later) provided in the lens-side terminal holding unit 32 and the lens-side control unit 33. The lens-side storage unit 35 is a non-volatile storage medium. The lens-side storage unit 35 is connected to the lens-side control unit 33. The lens-side storage unit 35 stores pre-defined control programs executed by the lens-side control unit 33. The lens-side control unit 33 controls the replacement of the lens 3 by loading and executing the control program from the lens-side storage unit 35.

[0019] The imaging optical system 36 images the subject (object being photographed) onto the imaging surface of the imaging element 27, which will be described later. The optical axis O of the imaging optical system 36 is approximately aligned with the center of the lens-side mount 31 and the body-side mount 21, which will be described later. Figure 1The imaging optical system 36 generally includes a lens 36a, a focusing lens 36b, and a lens 36c. The focusing lens 36b is a lens used to adjust the imaging position of the subject image. The drive unit 37 is connected to the lens-side control unit 33 and has an actuator (not shown). The drive unit 37 drives the focusing lens 36b along the optical axis direction (+Z direction, -Z direction) via the actuator (not shown).

[0020] The camera body 2 includes a body-side mounting accessory 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, an imaging element 27, and a switch 28 for detecting the status of the lock pin (described later).

[0021] The body-side control unit 23 consists of a microcomputer and its peripheral circuits. Furthermore, the body-side control unit 23 performs various controls on the camera body, but only the communication-related parts are described in this disclosure; other functions are omitted. The body-side communication unit 24 performs data communication with the interchangeable lens 3, as described later. The body-side communication unit 24 is connected to the body-side terminals (described later) provided in the body-side terminal holding unit 22 and the body-side control unit 23. Additionally, a portion of the terminals in the body-side terminal holding unit 22 are 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. The body-side storage unit 25 stores pre-defined control programs, etc., executed by the body-side control unit 23. The body-side control unit 23 controls the camera body 2 by loading and executing the control programs from the body-side storage unit 25.

[0022] The power supply unit 26 provides power to the camera body 2 and the interchangeable lens 3. The power supply unit 26 is connected to the body-side terminal group (described later) and the body-side control unit 23, which are located in the body-side terminal holding unit 22. The imaging element 27 is, for example, a solid-state imaging element such as a CCD and / or CMOS. The imaging element 27 is connected to the body-side control unit 23, captures the subject, and outputs an imaging signal. The processing of the output imaging signal is omitted from the description.

[0023] Figure 2 This is a schematic circuit diagram illustrating the electrical connection between the camera body 2 and the interchangeable lens 3. The camera body-side terminal holding part 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. These 11 camera body-side terminals are collectively referred to as the camera body-side terminal group.

[0024] The LDET(B) terminal is used in the disassembly and assembly inspection of the lens 3. The LDET(B) terminal is connected to the body-side control unit 23 via resistor R2. Between resistor R2 and the body-side control unit 23, a power supply V33 supplied from the power supply unit 26 is connected via resistor R1, and the LDET(B) terminal is pulled up.

[0025] The VBAT(B), PGND(B), V33(B), and GND(B) terminals are power system terminals connected to the power supply unit 26. Figure 2 In the diagram, arrows indicate the direction of the supplied power. The VBAT(B) terminal is used to supply power to the interchangeable lens 3. The drive unit 37 of the interchangeable lens 3 is driven using the power supplied via the VBAT(B) terminal. Compared to the lens-side control unit 33, the drive unit 37 requires a larger voltage and current to operate, and the maximum voltage applied to the VBAT(B) terminal by the power supply unit 26 is approximately 10V. In the following description, the voltage applied to the VBAT(B) terminal by the power supply unit 26 will be referred to as the drive system voltage. The PGND(B) terminal is the ground terminal corresponding to the VBAT(B) terminal.

[0026] The V33(B) terminal is used to supply power to the interchangeable lens 3. The lens-side control unit 33 and other components operate using the power supplied by the power supply unit 26 via the V33(B) terminal. Compared to the drive unit 37, the lens-side control unit 33 and other components operate with a smaller voltage and a smaller current. The maximum voltage applied by the power supply unit 26 to the V33(B) terminal is approximately 3.3V. In the following description, the voltage applied by the power supply unit 26 to the V33(B) terminal will be referred to as the circuit system voltage. The GND(B) terminal is the ground terminal corresponding to the V33(B) terminal.

[0027] The RDY(B) terminal is connected to the fuselage-side communication unit 24. The DATAB(B), CLK(B), DATAL(B), HCLK(B), and HDATA(B) terminals are communication system terminals connected to the fuselage-side communication unit 24. The RDY(B), DATAB(B), CLK(B), and DATAL(B) terminals are used for command data communication, as described later. Additionally, the HCLK(B) and HDATA(B) terminals are connected to the fuselage-side communication unit 24 and used for hot-wire communication, as described later. Figure 2 In the diagram, arrows indicate the direction of signal flow. The potential of the RDY(B) terminal indicates whether the interchangeable lens 3 can perform command data communication. The DATAB(B) terminal is the terminal that outputs data signals to the interchangeable lens 3. The CLK(B) terminal is the terminal that outputs clock signals to the interchangeable lens 3.

[0028] The DATAL(B) terminal is the terminal into which data signals from the interchangeable lens 3 are input.

[0029] The HCLK(B) terminal is for inputting clock signals from the interchangeable lens 3. The HDATA(B) terminal is for inputting data signals from the interchangeable lens 3.

[0030] The lens-side terminal holding part 32 has an LDET (L) terminal, a VBAT (L) terminal, a PGND (L) terminal, a V33 (L) terminal, a GND (L) terminal, an RDY (L) terminal, a DATAB (L) terminal, a CLK (L) terminal, a DATAL (L) terminal, an HCLK (L) terminal, and an HDATA (L) terminal. These 11 lens-side terminals are collectively referred to as the lens-side terminal group. When attaching the interchangeable lens 3 to the camera body 2, if... Figure 2 As indicated by the dashed lines, the body-side terminals are electrically connected to the lens-side terminals. Specifically, the LDET(B) terminal is connected to the LDET(L) terminal, the VBAT(B) terminal to the VBAT(L) terminal, the PGND(B) terminal to the PGND(L) terminal, the V33(B) terminal to the V33(L) terminal, the GND(B) terminal to the GND(L) terminal, the RDY(B) terminal to the RDY(L) terminal, the DATAB(B) terminal to the DATAB(L) terminal, the CLK(B) terminal to the CLK(L) terminal, the DATAL(B) terminal to the DATAL(L) terminal, the HCLK(B) terminal to the HCLK(L) terminal, and the HDATA(B) terminal to the HDATA(L) terminal. The function of each lens-side terminal is the same as that of the respective body-side terminals, so explanation is omitted.

[0031] The LDET(L) terminal is grounded via resistor R3. When the LDET(L) terminal is in contact with the LDET(B) terminal, 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 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, DATAB(L) terminal, CLK(L) terminal, DATAL(L) terminal, HCLK(L) terminal, and HDATA(L) terminal are respectively connected to the lens-side communication unit 34.

[0032] (Explanation of command-data communication)

[0033] The following communication is referred to as command data communication: after sending control commands (commands) from the fuselage-side control unit 23 to the lens-side control unit 33 for changing lenses 3, control content (control data) from the fuselage-side control unit 23 and response content (response data) from the lens-side control unit 33 are sent and received in parallel. Command data communication is full-duplex communication. Command data communication is performed via the fuselage-side communication unit 24 and the lens-side communication unit 34 using digital data communication via RDY(B) terminals, RDY(L) terminals, DATAB(B) terminals, DATAB(L) terminals, CLK(B) terminals, CLK(L) terminals, DATAL(B) terminals, and DATAL(L) terminals.

[0034] The body-side control unit 23, via the body-side communication unit 24 and the lens-side communication unit 34, sends various control commands and control content to the interchangeable lens 3 through command data communication, and receives response content from the interchangeable lens 3, thereby exchanging various information with and from the interchangeable lens 3. The control commands mentioned here include, for example, commands to send lens information. The various information received from the interchangeable lens 3 includes, for example, information about the interchangeable lens 3's model (type) and information indicating optical characteristics such as the focal distance of the shooting optical system 36. The various information sent to the interchangeable lens 3 includes, for example, control content such as the lens drive amount and / or camera body 2's model information. Furthermore, the control commands also include drive commands for the focusing lens 36b. The lens-side control unit 33 receives various control commands from the body-side control unit 23, obtains various information from the body-side control unit 23, and sends various information back to the body-side control unit 23 via command data communication.

[0035] Figure 3 This is an example of a timing diagram representing the timing of command data communication. At the start of command data communication (T1), the fuselage-side control unit 23 first checks 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. If command data communication is not possible, the lens-side control unit 33 sets the signal level (potential) of the RDY(L) terminal to a high level (H level). If command data communication is possible, the lens-side control unit 33 sets the signal level (potential) of the RDY(L) terminal to a low level (L level) via the lens-side communication unit 34.

[0036] At the start of command data communication (T1), if the signal level of the RDY(B) terminal is low (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 clock signal 401 repeats high and low levels at a frequency of, 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 a manner synchronized with the clock signal 401. That is, the body-side control unit 23 sends 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 camera-side command signal 402, indicated by the switching between high and low levels of DATAB, is a control signal given by the camera-side control unit 23 to the lens-side control unit 33 via command data communication. For example, the camera-side command signal 402 may be a signal indicating a request to change the lens 3 and / or a signal indicating an instruction to drive the focusing lens 36b.

[0037] 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 (e.g., check data) contained in the body-side command signal 402 to perform a check for communication errors in the body-side command signal 402. Afterwards, the lens-side control unit 33 sets the signal level of the RDY(L) terminal to a 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.

[0038] Based on the instruction of the received command signal 402 from the body side, the lens-side control unit 33 begins the first control process 404.

[0039] When the first control process 404 is completed, the lens-side control unit 33 sets the signal level of the RDY(L) terminal to a 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 sends the clock signal 405 to the lens-side control unit 33 via the CLK(B) terminal and the CLK(L) terminal.

[0040] In addition, when the signal level of the RDY(B) terminal is high, the body-side control unit 23 does not transmit or receive the body-side data signal 406 or the lens-side data signal 407.

[0041] 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) and DATAB(L) terminals. The body-side data signal 406 is a signal representing the control parameters of the body-side command signal 402. For example, if the body-side command signal 402 indicates an instruction to drive the focusing lens 36b, the corresponding body-side data signal 406 is a signal representing the amount of drive of the focusing lens 36b. Alternatively, the body-side data signal 406 may be a signal representing information required by the lens-side control unit 33 during command data communication (such as camera model information).

[0042] 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 a manner synchronized with the clock signal 405. Figure 3 The lens-side data signal 407, indicated by the switching between high and low levels of DATAL, is a signal sent from the lens-side control unit 33 to the body-side control unit 23 via command data communication. For example, when the body-side command signal 402 is a signal indicating a request to change the lens 3, the corresponding lens-side data signal 407 is a signal indicating the camera model information for changing the lens 3.

[0043] 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 back to high level (T4). Based on the instruction of the received body-side data signal 406, the lens-side control unit 33 starts the second control process 408 (described later).

[0044] Here, the first control process 404 and the second control process 408 performed by the lens-side control unit 33 will be described. For example, the case where the received body-side command signal 402 contains specific information requesting the replacement of the lens 3 will be described. As the first control process 404, the lens-side control unit 33 performs the process of generating the requested information as a lens-side data signal 407. The lens-side data signal 407 generated in the first control process 404 is transmitted 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.

[0045] For example, let's describe the case where the received fuselage-side command signal 402 indicates an instruction to drive the focusing lens 36b. As the first control process 404, the lens-side control unit 33 performs a process of generating a signal indicating that a signal indicating an instruction to drive the focusing lens 36b has been received. The signal generated in the first control process 404 is sent to the fuselage-side control unit 23 as a lens-side data signal 407 via the lens-side communication unit 34, the DATAL (L) terminal, the DATAL (B) terminal, and the fuselage-side communication unit 24. As the second control process 408, the lens-side control unit 33 performs a process of driving the focusing lens 36b according to the drive amount specified by the fuselage-side data signal 406.

[0046] 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.

[0047] The communication performed during the aforementioned timings T1 to T5 constitutes a single command data communication. In this single command data communication, the fuselage-side control unit 23 transmits a fuselage-side command signal 402 and a fuselage-side data signal 406. That is, the fuselage-side command signal 402 and the fuselage-side data signal 406 together constitute a single control data signal.

[0048] As described above, the lens-side control unit 33 receives control data from the fuselage-side control unit 23 and sends response data to the fuselage-side communication unit 24 in parallel. In other words, the command data communication is a so-called full-duplex communication.

[0049] (Instructions for hotline communication)

[0050] As another communication system, there is communication that transmits data in one direction from the lens-side control unit 33 of the interchangeable lens 3 to the body-side control unit 23 of the camera body 2, and this is called hot-wire communication. Hot-wire communication is data communication between 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 using the HCLK(B) terminal, HCLK(L) terminal, HDATA(B) terminal, and HDATA(L) terminal. The body-side control unit 23 obtains information related to the status of the interchangeable lens 3 from the lens-side control unit 33 of the interchangeable lens 3 through hot-wire communication. Information related to the status of the interchangeable lens 3 includes, for example, the position of the focusing lens 36b and / or the position of the shake-correcting lens (not shown), the position of the aperture, etc. Furthermore, the shake-correcting lens is a component that can be moved (driven) to include a component perpendicular to the optical axis, and the aperture is a component that can be moved (driven) to change the size of the opening through which the light beam passes. The hotline communication is as follows: when a communication start instruction is sent from the camera body via command data communication, the lens-side control unit 33 independently sends lens data to the camera body-side control unit 23 until a communication end instruction is sent.

[0051] Figure 4 This is an example of a timing diagram representing the timing of hot-wire communication. When the lens-side control unit 33 receives a command to start hot-wire communication from the camera body-side control unit 23 via command data communication (T6), it performs a generation process 501. The generation process 501 is, for example, acquiring the lens state with a sampling period of 1 millisecond and generating a lens signal 503 for hot-wire 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 camera 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, 8MHz to 20MHz. That is to say, the frequency of the clock signal 502 for hot-wire communication is the same as, or higher than, the frequency of the clock signal 401 for command data communication.

[0052] The lens-side control unit 33 outputs the lens signal 503 (e.g., 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 a manner synchronized with the clock signal 502. That is, the lens-side control unit 33 sends the lens signal 503 to the fuselage-side control unit 23 via the lens-side communication unit 34, the HDATA(L) terminal, the HDATA(B) terminal, and the fuselage-side communication unit 24. Figure 4The lens signal 503, indicated by the switching between high and low levels of HDATA, is a signal sent from the lens-side control unit 33 to the body-side control unit 23 via hot-wire communication. The clock signal 502 and the lens signal 503 are output at the end of timing T8.

[0053] The lens-side control unit 33 repeats the transmission of lens data via hot-wire communication once every certain period of time (e.g., 1 millisecond) until it receives the transmission stop instruction of the lens signal 503 via command data communication.

[0054] Command data communication and hotline communication can be performed in parallel, either partially or entirely. That is, the fuselage-side control unit 23 and the lens-side control unit 33 can start or stop hotline communication while performing command data communication. Additionally, command data communication can also be started or stopped while performing hotline communication.

[0055] As described above, hot-wire communication and command communication are conducted independently. The lens-side control unit 33 transmits information related to the state of lens replacement 3 to the body-side control unit 23 via hot-wire communication, independent of command communication. Therefore, even during command communication, the body-side control unit 23 can continue to monitor the state of lens replacement 3. Consequently, the body-side control unit 23 can continue to monitor the position of the focusing lens 36b, thus enabling, for example, high-speed autofocus control. The same applies to shake correction control and / or aperture control.

[0056] Furthermore, even while the lens-side control unit 33 is conducting hot-line communication, the body-side control unit 23 can issue various instructions to the lens replacement unit 3 via command communication at any time.

[0057] (Explanation of the lens assembly mechanism)

[0058] The camera system 1 of this embodiment has a so-called Bajonett-type lens mounting mechanism. Hereinafter, the body-side mounting part 21 of the camera body 2 and the lens-side mounting part 31 of the interchangeable lens 3 will be described in turn.

[0059] Figure 5 (a) is a schematic diagram showing the assembly of the camera body 2 as viewed from the side of the interchangeable lens 3. The camera body 2 has Figure 1 The aforementioned fuselage-side mounting part 21 and fuselage-side terminal holding part 22. The fuselage-side mounting part 21 has an annular reference surface with a certain width. Furthermore, the fuselage-side mounting part 21 has a fuselage-side first claw part 29a, a fuselage-side second claw part 29b, a fuselage-side third claw part 29c, and a fuselage-side fourth claw part 29d. In the following description, the above four claw parts are collectively referred to as fuselage-side claw parts 29.

[0060] The side claws 29 are arranged at intervals along the circular opening of the side mounting fitting 21. For example... Figure 5 As shown in (a), the first claw 29a on the fuselage side is positioned at the upper right, the second claw 29b on the fuselage side is positioned at the upper left, the third claw 29c on the fuselage side is positioned at the lower left, and the fourth claw 29d on the fuselage side is positioned at the lower right.

[0061] The circumferential lengths of the first claw portion 29a to the fourth claw portion 29d on the fuselage side are all different. Specifically, the first claw portion 29a on the fuselage side is the longest, the third claw portion 29c on the fuselage side is the second longest, the fourth claw portion 29d on the fuselage side is the third longest, and the second claw portion 29b on the fuselage side is the shortest.

[0062] The fuselage-side claw 29 protrudes from the fuselage-side mounting accessory 21 toward the center of the opening. There are portions with and without the fuselage-side claw 29 on the circumference of the opening. In the following description, the space 40a between the first fuselage-side claw 29a and the fourth fuselage-side claw 29d on the circumference of the opening of the fuselage-side mounting accessory 21 is referred to as the first fuselage-side insertion / removal portion 40a. Similarly, the space 40b between the first fuselage-side claw 29a and the second fuselage-side claw 29b is referred to as the second fuselage-side insertion / removal portion 40b, the space 40c between the second fuselage-side claw 29b and the third fuselage-side claw 29c is referred to as the third fuselage-side insertion / removal portion 40c, and the space 40d between the third fuselage-side claw 29c and the fourth fuselage-side claw 29d is referred to as the fourth fuselage-side insertion / removal portion 40d. The four fuselage side plug-in sections mentioned above are collectively referred to as fuselage side plug-in sections 40.

[0063] A fuselage-side terminal holding portion 22 is provided inside the opening of the fuselage-side mounting component 21. The fuselage-side terminal holding portion 22 has an arc-shaped form corresponding to the shape of the annular fuselage-side mounting component 21. The fuselage-side terminal holding portion 22 is arranged parallel to the opening of the fuselage-side mounting component 21 at the upper part of the opening, preferably as follows: Figure 5 As shown in (a), it is arranged in the center of the upper part. As described above, the fuselage-side terminal holding part 22 has a plurality of fuselage-side terminals. In the fuselage-side terminal holding part 22, the plurality of fuselage-side terminals are arranged in a row and configured in an arc shape inside the fuselage-side mounting part 21. Figure 5 As shown in (a), the fuselage-side terminals are arranged from right to left as follows: HDATA(B), HCLK(B), DATAL(B), CLK(B), DATAB(B), RDY(B), GND(B), V33(B), PGND(B), VBAT(B), and LDET(B). Each terminal in the fuselage-side terminal group is a conductive pin. The fuselage-side terminal group is pushed in the -Z direction by springs (not shown). Figure 1-Z direction refers to the direction towards the interchangeable lens 3 attached to the camera, which is the direction of the subject.

[0064] The fuselage-side mounting component 21 has a through hole for a locking pin 42. The through hole for the locking pin 42 is located on the upper right of the fourth claw portion 29d on the fuselage side. That is, on the annular reference surface of the fuselage-side mounting component 21, the hole for the locking pin 42 is located within the opening of the fuselage-side mounting component 21, between the area where the fourth claw portion 29d on the fuselage side is located and the area where the first claw portion 29a on the fuselage side is located. The locking pin 42 is pushed in the -Z direction by a spring (not shown) or the like. Figure 1 ).

[0065] Figure 5 (b) is a schematic diagram of the camera body 2 with the body-side accessory 21 removed, as viewed from the lens replacement 3 side. A first leaf spring 41a is located at the position corresponding to the first claw 29a on the body side (the back side of the first claw 29a on the body side). Similarly, a second leaf spring 41b is located at the position corresponding to the second claw 29b on the body side (the back side of the second claw 29b on the body side), a third leaf spring 41c is located at the position corresponding to the third claw 29c on the body side (the back side of the third claw 29c on the body side), and a fourth leaf spring 41d is located at the position corresponding to the fourth claw 29d on the body side (the back side of the fourth claw 29d on the body side). In the following description, the four leaf springs are collectively referred to as leaf spring 41. Leaf spring 41 presses the lens-side claw (described later) in the +Z direction (camera body 2 side).

[0066] Figure 6 This diagram schematically illustrates the assembly of the interchangeable lens 3 as viewed from the sides of the camera body. The interchangeable lens 3 features... Figure 1 The lens-side mounting part 31 and the lens-side terminal holding part 32 mentioned above. The lens-side mounting part 31 has an annular reference surface with a certain width. When the replacement lens 3 is attached to the camera body 2, the annular reference surface of the lens-side mounting part 31 contacts the annular reference surface of the aforementioned body-side mounting part 21. Furthermore, the lens-side mounting part 31 has a cylindrical portion extending along the optical axis on its inner periphery. The lens-side mounting part 31 has a lens-side first claw portion 39a, a lens-side second claw portion 39b, a lens-side third claw portion 39c, and a lens-side fourth claw portion 39d spaced apart from each other along the outer periphery of its cylindrical portion. In the following description, the above four claw portions are collectively referred to as lens-side claw portions 39.

[0067] The lens-side claw 39 is positioned in a direction that protrudes from the outer periphery of the cylindrical portion of the lens-side mount 31 toward the outer side of the mount (radial direction from the optical axis O). For example... Figure 6As shown, the first lens-side claw 39a is positioned at the upper left, the second lens-side claw 39b at the upper right, the third lens-side claw 39c at the lower right, and the fourth lens-side claw 39d at the lower left. On the rear side of the lens-side claws 39 (the reference surface side of the lens-side mounting accessory 31), there is space to accommodate the corresponding body-side claws 29 when the interchangeable lens 3 is attached to the camera body 2.

[0068] A lens-side terminal holding portion 32 is provided inside the opening of the lens-side fitting 31. The lens-side terminal holding portion 32 has an arc-shaped form corresponding to the shape of the annular lens-side fitting 31. The lens-side terminal holding portion 32 is arranged parallel to the opening of the lens-side fitting 31 on the upper part of the lens-side fitting 31, preferably as follows: Figure 6 As shown, it is positioned at the center of the upper part. 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 and configured in an arc shape inside the lens-side mounting part 31. Figure 6 As shown, the lens-side terminals are configured from right to left with 11 terminals: LDET(L), VBAT(L), PGND(L), V33(L), ​​GND(L), RDY(L), DATAB(L), CLK(L), DATAL(L), HCLK(L), and HDATA(L). The lens-side terminal groups are configured with their conductive contact surfaces facing the +Z direction. Figure 1 The +Z direction refers to the direction in which the light from the subject passes through the imaging optical system 36 and moves towards the imaging element 27.

[0069] The lens side mounting accessory 31 has a locking pin receiving part 43. For example... Figure 6 As shown, the locking pin receiving part 43 is disposed on the upper left of the fourth claw part 39d on the lens side. That is, the locking pin receiving part 43 is disposed between the portion of the lens-side mounting accessory 31 corresponding to the first claw part 39a on the lens side and the portion corresponding to the fourth claw part 39d on the lens side. The locking pin receiving part 43 is a groove that accommodates the locking pin 42 when the interchangeable lens 3 is attached to the camera body 2. This groove faces the -Z direction (...). Figure 1 And set.

[0070] When the interchangeable lens 3 is attached to the camera body 2, multiple body-side terminals physically contact their corresponding lens-side terminals. Through this contact, the multiple body-side terminals and the multiple lens-side terminals are electrically connected. That is, the multiple body-side terminals and the multiple lens-side terminals are electrically conductive.

[0071] (Attachment for changing lenses)

[0072] The method for attaching the interchangeable lens 3 to the camera body 2 will be explained. When attaching the interchangeable lens 3 to the camera body 2, first align the body-side mounting accessory 21 with the lens-side mounting accessory 31. Position the first lens-side claw 39a at the first body-side insertion / removal part 40a, the second lens-side claw 39b at the second body-side insertion / removal part 40b, the third lens-side claw 39c at the third body-side insertion / removal part 40c, and the fourth lens-side claw 39d at the fourth body-side insertion / removal part 40d. Then, insert the first lens-side claw 39a into the first body-side insertion / removal part 40a, the second lens-side claw 39b into the second body-side insertion / removal part 40b, the third lens-side claw 39c into the third body-side insertion / removal part 40c, and the fourth lens-side claw 39d into the fourth body-side insertion / removal part 40d. At this time, the LDET(L) terminal is in contact with the CLK(B) terminal, the VBAT(L) terminal is in contact with the DATAL(B) terminal, the PGND(L) terminal is in contact with the HCLK(B) terminal, and the V33(L) terminal is in contact with the HDATA(B) terminal.

[0073] From this state onwards, change lens 3 along Figure 5 as well as Figure 6 The mounting direction 44 is rotated as shown. That is, the first claw 29a on the body side enters the space behind the first claw 39a on the lens side, the second claw 29b on the body side enters the space behind the second claw 39b on the lens side, the third claw 29c on the body side enters the space behind the third claw 39c on the lens side, and the fourth claw 29d on the body side enters the space behind the fourth claw 39d on the lens side. At this time, multiple lens-side terminals and multiple body-side terminals contact each other in sequence. Alternatively, instead of changing the lens 3, the camera body 2 can be rotated along the... Figure 5 as well as Figure 6 Rotate in the opposite direction to the mounting direction 44 shown.

[0074] When the lens side claw 39 is inserted into its corresponding body side insertion / removal part 40 and rotated along the mounting direction 44, for example, the LDET(L) terminal sequentially 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. For example, the VBAT(L) terminal sequentially 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. For example, the PGND(L) terminal sequentially 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. For example, the V33(L) terminal is sequentially connected to 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. Similarly, the GND(L) terminal is sequentially connected to the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, DATAB(B) terminal, RDY(B) terminal, and GND(B) terminal.

[0075] For example, the RDY(L) terminal is sequentially connected to the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, DATAB(B) terminal, and RDY(B) terminal. For example, the DATAB(L) terminal is sequentially connected to the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, CLK(B) terminal, and DATAB(B) terminal. For example, the CLK(L) terminal is sequentially connected to the HDATA(B) terminal, HCLK(B) terminal, DATAL(B) terminal, and CLK(B) terminal. For example, the DATAL(L) terminal is sequentially connected to the HDATA(B) terminal, HCLK(B) terminal, and DATAL(B) terminal. For example, the HCLK(L) terminal is sequentially connected to the HDATA(B) terminal and HCLK(B) terminal.

[0076] Rotating the interchangeable lens 3 relative to the camera body 2 by a predetermined angle will bring it to the mounting completion position. In the mounting completion position, the corresponding body-side claw 29 and lens-side claw 39 are aligned with the optical axis, and the locking pin 42 is engaged along... Figure 1The locking pin 42 is pushed in the -Z direction and enters the locking pin receiving part 43. When the locking pin 42 enters the locking pin receiving part 43, the replacement lens 3 cannot be rotated relative to the camera body 2 for removal. That is, when the body-side claw 29 and the lens-side claw 39 reach the predetermined attachment completion position, the relative position of the body-side mounting part 21 and the lens-side mounting part 31 is fixed. The lens-side claw 39 is pushed against the body side by the leaf spring 41. Figure 1 (in the +Z direction). Thus, each of the multiple lens-side terminals contacts and is electrically connected to each of the corresponding multiple body-side terminals.

[0077] In the following description, the state in which the body-side claw 29 and the lens-side claw 39 reach the predetermined attachment completion position is referred to as the attachment completion state. The following state is referred to as the attachment in progress state: the state in which the lens-side claw 39 is rotated from the position of insertion into the body-side insertion / removal part 40 until it is about to reach the attachment completion position, or the state in which it is rotated from the position about to reach the attachment completion position until it is about to be inserted.

[0078] When the lens is being attached, the signal level of the LDET(B) terminal is pulled up to a high level. When the camera-side control unit 23 detects that the signal level of the LDET(B) terminal is high, it determines that the replacement lens 3 is not attached. When the replacement lens 3 is not attached, the camera-side control unit 23 prevents the power supply unit 26 from supplying power to the VBAT(B) and V33(B) terminals.

[0079] When the attachment is complete, as described above ( Figure 2 In this way, the signal level of the LDET(B) terminal is pulled down to a low level. When the camera body control unit 23 detects that the signal level of the LDET(B) terminal has become low, it determines that the replacement lens 3 has been installed. In addition, in the installed state, the locking pin 42 enters the locking pin receiving part 43, and the switch 28 (linked with the locking pin 42) Figure 1 The switch 28 is turned on. When the camera body control unit 23 detects that the signal level of the LDET(B) terminal has become low and the switch 28 has been turned on, the power supply unit 26 starts supplying power to the V33(B) terminal. Alternatively, the camera body 2 may not need to have the switch 28. Without the switch 28, it is sufficient to have the power supply unit 26 start supplying power to the V33(B) terminal at the moment when the signal level of the LDET(B) terminal is detected to have become low.

[0080] When power supply to terminal V33(B) begins, power is supplied to the lens-side control unit 33 of the interchangeable lens 3 via terminal V33(L), ​​and the lens-side control unit 33 begins operation. The lens-side control unit 33, now operational, allows initial communication based on command data communication with the body-side control unit 23. After the lens-side control unit 33 allows initial communication, the body-side control unit 23 begins initial communication. This initial communication includes a signal from the lens-side control unit 33 requesting power supply to terminal VBAT(L). When this signal requests power supply to terminal VBAT(L) 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 terminal VBAT(B) to perform initialization processing between the camera body 2 and the interchangeable lens 3. During initialization, information required for various operations of the camera system 1, such as shooting and / or focusing, is exchanged between the camera body 2 and the interchangeable lens 3, and the lens position of the interchangeable lens is moved to a reference position.

[0081] When the attachment is complete, if the user presses the unlock button (not shown) on the camera body, the locking pin 42 disengages from the locking pin receiving part 43. This allows the relative positions of the body-side mounting part 21 and the lens-side mounting part 31 to be changed. If the user presses the unlock button (not shown), the switch 28 linked to the unlock button is turned off, and the body-side control unit 23 stops the power supply unit 26 from supplying power to the VBAT(B) terminal and the V33(B) terminal. From this state, if the interchangeable lens 3 is moved along the... Figure 5 as well as Figure 6 If the mounting direction 44 is rotated in the opposite direction, the multiple lens-side terminals will come into contact with the multiple body-side terminals in the reverse order as described above.

[0082] Furthermore, power supply can be stopped without being linked to the operation of the unlock button. In this case, when the camera-side control unit 23 detects that the LDET(L) terminal and the LDET(B) terminal have separated due to rotation of the lens 3 in the opposite direction to the mounting direction 44 and that the signal level of the LDET(B) terminal changes from low to high, the power supply unit 26 stops supplying power to the VBAT(B) terminal and the V33(B) terminal. This reduces the number of components in the camera system 1. Alternatively, the power supply unit 26 can stop supplying power to the VBAT(B) terminal and the V33(B) terminal when both the unlock button is pressed and the signal level of the LDET(B) terminal changes from low to high are detected. Or, the camera-side control unit 23 can stop supplying power to the VBAT(B) terminal and the V33(B) terminal when either the unlock button is pressed or the signal level of the LDET(B) terminal changes from low to high is detected.

[0083] As described above, during the process of installing and replacing a lens on the camera body and during the process of removing the lens from the camera body (in the mounting state), the lens-side terminal will come into contact with the body-side terminal other than the terminal that should be present when the mounting is complete. Regarding the arrangement of the lens-side terminal and the body-side terminal, it is preferable to arrange them in a way that minimizes the adverse effects (malfunctions) caused by contact during the mounting and dismounting processes.

[0084] (Terminal configuration considering noise)

[0085] In this embodiment, the LDET(B) terminal among the multiple body-side terminals is positioned in the lens mounting direction. Figure 5 The foremost point of arrow 44 in (a). That is, the LDET(B) terminal is positioned as described above. Figure 5 The leftmost terminal of the body-side terminal group in (a). The LDET(L) terminal among the multiple lens-side terminals is also similarly positioned in the lens mounting direction. Figure 6 The foremost point of arrow 44). That is, the LDET(L) terminal is positioned as described above. Figure 6 The LDET(B) terminal is located on the far right of the lens-side terminal group. Therefore, until the lens replacement is completed, the LDET(B) terminal does not come into contact with any lens-side terminals other than the LDET(L) terminal. Consequently, during the lens replacement process, the signal level of the LDET(B) terminal will not erroneously go low, and the lens replacement will not be incorrectly identified.

[0086] In this embodiment, the VBAT(B) terminal is positioned next to the LDET(B) terminal, that is, the second position from the foremost point in the mounting direction. The VBAT(L) terminal is also positioned next to the LDET(L) terminal, that is, the second position from the foremost point in the mounting direction. This is to reduce the number of lens-side terminals that the camera-side VBAT(B) terminal contacts during lens mounting. Since the voltage applied to the VBAT(B) terminal is a higher voltage than the other terminals, if a high voltage is accidentally applied to the VBAT(B) terminal due to a malfunction in the camera system 1, and the VBAT(B) terminal comes into contact with a terminal other than the VBAT(L) terminal, this high voltage may unexpectedly burden the electrical circuitry within the lens replacement circuitry. In this embodiment, the VBAT(B) terminal is located next to the LDET(B) terminal; therefore, during lens replacement 3 mounting, only the LDET(L) terminal contacts the VBAT(B) terminal among the multiple lens-side terminals. Figure 2 As shown, the LDET(L) terminal is grounded via resistor R3, so that even if a high voltage is applied from the VBAT(B) terminal, it will not affect the camera system 1.

[0087] In this embodiment, the PGND(B) terminal is positioned next to the VBAT(B) terminal, that is, the third position from the foremost point in the mounting direction. The PGND(L) terminal is positioned next to the VBAT(L) terminal, that is, the third position from the foremost point in the mounting direction. A high-voltage charge supplied from the VBAT(B) terminal is 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 initially contacts the PGND(B) terminal. The charge stored in the capacitor C1 is immediately discharged from the PGND(B) terminal, which serves as a ground terminal, without affecting other circuits of the camera system 1.

[0088] In this embodiment, a V33(B) terminal is positioned fourth from the front in the mounting direction next to the PGND(B) terminal, and a GND(B) terminal is positioned fifth from the front next to it. Similarly, a V33(L) terminal is positioned fourth from the front in the mounting direction next to the PGND(L) terminal, and a GND(L) terminal is positioned fifth from the front next to it. The capacitor C2 connected to the V33(L) terminal stores the charge of the voltage supplied from the V33(B) terminal. When the interchangeable lens 3 is rotated in the removal direction, the V33(L) terminal initially contacts the GND(B) terminal. The charge stored in the capacitor C2 is immediately discharged from the GND(B) terminal, which serves as a ground terminal, without affecting other circuits of the camera system 1.

[0089] The RDY(B) terminal is configured next to the GND(B) terminal, that is, the sixth position from the beginning. The DATAB(B) terminal is configured next to it, that is, the seventh position from the beginning. The CLK(B) terminal is configured next to it, that is, the eighth position from the beginning. The DATAL(B) terminal is configured next to it, that is, the ninth position from the beginning. The HCLK(B) terminal is configured next to it, that is, the tenth position from the beginning. The HDATA(B) terminal is configured next to it, that is, the last position.

[0090] The RDY(L) terminal is configured next to the GND(L) terminal, that is, the sixth position from the beginning. The DATAB(L) terminal is configured next to it, that is, the seventh position from the beginning. The CLK(L) terminal is configured next to it, that is, the eighth position from the beginning. The DATAL(L) terminal is configured next to it, that is, the ninth position from the beginning. The HCLK(L) terminal is configured next to it, that is, the tenth position from the beginning. The HDATA(L) terminal is configured next to it, that is, the last position.

[0091] Next, the noise impact caused by the communication lines formed by the terminals on each body side and each lens side will be explained. Hot-wire communication is a one-way communication that sends information to the camera body after communication begins, and it is performed at a high frequency (repeated with extremely short cycles). During hot-wire 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 with short cycles, so it may become a large noise source for other signals. Furthermore, the clock signal sent from the HCLK(L) terminal to the HCLK(B) terminal is a signal output from the interchangeable lens 3, so even if noise is mistakenly added to the clock signal, the camera body 2 cannot detect the noise. Thus, the signal flowing through the HCLK terminal may also become a noise source for the camera body 2, leading to malfunction of the camera system 1. Examples of malfunctions include misdetection of interchangeable lens attachment and / or misjudging whether command communication can be performed. In this embodiment, the HCLK terminal is located away from the VBAT terminal where high voltage is applied. Additionally, the HCLK terminal is configured separately from the RDY terminal, which is used to indicate whether command communication is possible, so that they are not adjacent.

[0092] In addition, HDATA and DATAL terminals are positioned to the left and right of the HCLK terminal. This helps to suppress the impact of noise from the HCLK terminal on terminals other than the HDATA and DATAL terminals.

[0093] Next, as described above, command data communication is a bidirectional communication between the camera 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 can also become a noise source for the same reasons as described above. Therefore, in this embodiment, the CLK terminal is positioned away from the VBAT terminal, which is subjected to high voltage. In addition, the CLK terminal and the RDY terminal used to indicate whether command communication can be performed are separated so that they are not adjacent. Furthermore, if the HCLK terminal and the CLK terminal are adjacent, the clock signal of one will affect the clock signal of the other and may become a noise source. In this 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 noise caused by the CLK terminal on the camera system can be suppressed.

[0094] Furthermore, as mentioned above, command data communication requires determining the level of the RDY terminal. That is, the signal level of the RDY terminal indicates whether command data communication is possible; therefore, noise has a significant impact on shooting operations. Here, consider the case where, although command data communication is impossible, the camera-side control unit 23 mistakenly identifies it as being able to communicate due to noise. In this case, the lens-side control unit 33 cannot receive command data, but the camera-side control unit 23 sends command data, and the camera-side control unit 23 mistakenly identifies it as performing control according to this command data during lens changes. However, the lens-side control unit 33 does not accept the command data and therefore does not perform control according to the mistakenly sent command data. Therefore, the operation of the camera system 1 is hindered. Therefore, it is necessary to prevent noise from being added to the signal of the RDY terminal. To prevent noise from being added to the signal of the RDY terminal, it is preferable to arrange terminals with relatively stable signals, i.e., signals with less change in signal level per unit time, on the left and right adjacent to the RDY terminal. In this embodiment, a GND terminal and a DATAB terminal are arranged on the left and right adjacent to the RDY terminal. The GND terminal is the ground potential terminal, and therefore stable. The DATAB terminal is also a terminal that carries a more stable signal compared to the CLK and / or HCLK terminals. Because of this, it can suppress the noise affecting the signal at the RDY terminal.

[0095] Next, the power supplied from the VBAT(B) terminal to the VBAT(L) terminal is used to drive the actuator (e.g., a stepper motor) of the drive unit 37 for the lens replacement 3. Therefore, the current flowing through the VBAT terminal fluctuates significantly when the actuator is driven and not driven. This current fluctuation becomes a noise source for the signals flowing through other terminals. In this embodiment, the VBAT terminal is positioned away from the RDY, DATAB, CLK, and DATAL terminals used for command data communication, and the HCLK and HDATA terminals used for hot-line communication. Furthermore, the GND, V33, and PGND terminals are positioned between the VBAT terminal and these communication terminals. This suppresses the impact of noise caused by the fluctuation of the current flowing through the VBAT terminal on data communication.

[0096] Here is a summary of the terminal configurations that take noise into account, as described above.

[0097] The RDY terminal is configured separately from the VBAT and HCLK terminals, which are potential sources of noise, so that they are not adjacent to each other. This suppresses the influence of noise on the RDY terminal, which is used to indicate whether command communication is possible.

[0098] The HCLK terminal, which could 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, HCLK terminal, DATAL terminal, CLK terminal, and DATAB terminal are arranged sequentially from the rear end in the mounting direction. This suppresses the influence of noise caused by the clock signal on the RDY terminal, etc.

[0099] Furthermore, considering the impact of noise, the power supply terminal group and the communication terminal group are configured separately across the RDY terminal. Specifically, across the RDY terminal, on the front side in the mounting direction, the VBAT terminal, PGND terminal, V33 terminal, and GND terminal (power supply terminals) are arranged sequentially from the front side, and on the rear side in the mounting direction, the DATAB terminal, CLK terminal, DATAL terminal, HCLK terminal, and HDATA terminal (communication terminals) are arranged sequentially from the front side. This suppresses the noise impact on the RDY terminal from the power supply system terminal group (such as the VBAT terminal) and the communication terminal group (such as the HCLK and CLK terminals).

[0100] Regarding the HCLK terminal for transmitting clock signals used in hot-line communication and the CLK terminal for transmitting clock signals used in command data communication, the HCLK terminal is positioned further away from the VBAT terminal than the CLK terminal. This is because the clock signal transmitted from the CLK terminal to the lens changer is output by the body-side control unit 23 via the body-side communication unit 24. If noise is added to the clock signal transmitted from the lens changer via the lens-side communication unit 34 and through the HCLK(L) terminal to the camera body, the body-side control unit 23 will misinterpret it. Therefore, the noise added to the clock signal at the HCLK terminal has a greater impact on the camera system 1.

[0101] Regarding the HCLK and GND terminals, the HCLK terminal is positioned further away from the VBAT terminal than the GND terminal. Furthermore, a PGND terminal is positioned between the GND and VBAT terminals. This effectively shields the HCLK terminal from noise caused by the VBAT terminal that affects the clock signal transmitted in hot-line communication.

[0102] Regarding the CLK and GND terminals, the CLK terminal is positioned further away from the VBAT terminal than the GND terminal. Furthermore, the PGND terminal is positioned between the GND and VBAT terminals. This effectively shields the CLK terminal from noise caused by the VBAT terminal that affects the clock signal transmitted in command data communication.

[0103] (Considering the terminal configuration for wear)

[0104] This explains the contact of each terminal when disassembling and assembling the camera body 2 to replace the lens 3.

[0105] When the interchangeable lens 3 is installed on the camera body 2, the body-side terminals and lens-side terminals contact each other one by one. The same process occurs when removing the interchangeable lens 3 from the camera body 2. That is, the pins protruding from the body-side terminal holding part 22, i.e., the body-side terminals, are rubbed against the exposed conductive contact surfaces, i.e., the lens-side terminals, one by one. Since multiple interchangeable lenses are installed and removed from a single camera body, the body-side terminals are more prone to wear than the lens-side terminals. In particular, the body-side terminals located at the rear end in the mounting direction of the interchangeable lens 3 experience more friction against the lens-side terminals. Therefore, the tips of the pins on the rear-end body terminals wear more easily than those on the front-end body terminals. Wear on the body-side terminals affects the contact with the lens-side terminals, which may lead to unstable data communication.

[0106] In this embodiment, the LDET(B) terminal is positioned at the foremost point in the mounting direction, thus minimizing wear on the LDET(B) terminal. Consequently, the LDET(B) terminal and the LDET(L) terminal make good contact, reducing the likelihood of false detection of lens 3 replacement.

[0107] As mentioned earlier, in this embodiment, to suppress the impact of noise on communication, the CLK(B) terminal and HCLK(B) terminal are positioned away from the VBAT(B) terminal. That is, the VBAT(B) terminal is positioned second from the front end in the mounting direction, while the CLK(B) terminal and HCLK(B) terminal are positioned further away from the rear end of the VBAT(B) terminal. Therefore, the CLK(B) terminal and HCLK(B) terminal experience more wear than the LDET(B) terminal and VBAT(B) terminal. In this embodiment, the CLK(B) terminal and HCLK(B) terminal are positioned immediately next to the first claw portion 29a on the fuselage side. That is, the CLK(B) terminal and HCLK(B) terminal are positioned closer to the inner periphery of the first claw portion 29a on the fuselage side than the VBAT(B) terminal. In other words, the distance between the CLK(B) terminal and the inner periphery of the first claw portion 29a on the body side is shorter than the distance between the VBAT(B) terminal and the inner periphery of the first claw portion 29a on the body side. Furthermore, the distance between the HCLK(B) terminal and the inner periphery of the first claw portion 29a on the body side is shorter than the distance between the VBAT(B) terminal and the inner periphery of the first claw portion 29a on the body side. As described above, a first leaf spring 41a is provided on the back side of the first claw portion 29a on the body side. The first leaf spring 41a holds the first claw portion 39a on the lens side along the +Z direction (…). Figure 1Pressing. From the perspective of the first leaf spring 41a, the distances between the CLK(B) terminal and the first leaf spring 41a, as well as the distances between the HCLK(B) terminal and the first leaf spring 41a, are both shorter than the distances between the VBAT(B) terminal and the first leaf spring 41a. Similarly, the distances between the LDET(B) terminal and the first leaf spring 41a are also shorter for both the CLK(B) terminal and the HCLK(B) terminal than for the LDET(B) terminal. Therefore, the CLK(B) and HCLK(B) terminals are pressed more forcefully against the lens-side terminals than the VBAT(B) and LDET(B) terminals.

[0108] On the lens side, the CLK(L) and HCLK(L) terminals are positioned closer to the inner periphery of the first claw 39a on the lens side than the VBAT(L) terminal. In other words, the distance between the CLK(L) terminal and the inner periphery of the first claw 39a on the lens side is shorter than the distance between the VBAT(L) terminal and the inner periphery of the first claw 39a on the lens side, and the distance between the HCLK(L) terminal and the inner periphery of the first claw 39a on the lens side is shorter than the distance between the VBAT(L) terminal and the inner periphery of the first claw 39a on the lens side. Therefore, when the CLK(L) terminal and HCLK(L) terminal located next to the first claw 39a on the lens side are fully attached, they are pressed against the corresponding terminals on the camera body side by the first leaf spring 41a. Furthermore, similar to the VBAT(L) terminal, in the fully attached 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 both shorter than those between the LDET(L) terminal and the first leaf spring 41a. Because of this, the CLK(L) and HCLK(L) terminals are pressed against the camera body side terminals with a stronger force than the LDET(L) terminal in the fully attached state. Therefore, even if the CLK(B) terminal and / or HCLK(B) terminal experience wear, good contact can be maintained, and the clock signal remains stable, enabling stable data communication. Additionally, even if the camera body 2 and / or the interchangeable lens 3 are subjected to an impact while maintaining the fully attached state, 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, remains unchanged.

[0109] Even if a portion of the lens-side first claw 39a is slotted, the entire assembly of the protrusion located in the area opposite to the body-side first claw 29a and the slotted portion is defined as the lens-side first claw. As a method of slotting, the lens-side claw can be slotted by dividing it into two or more parts in the circumferential direction, by cutting off a portion of the lens-side claw, or by shortening the radial length of at least a portion of the lens-side claw. Furthermore, the circumferential length of the lens-side claw can be varied within the range of the corresponding body-side insertion / removal portion. The same applies to the lens-side second claw 39b, lens-side third claw 39c, and lens-side fourth claw 39d. Additionally, the radial thickness of the cylindrical portion can be appropriately varied, and it can also be a shape in which at least a portion of the cylindrical portion protrudes inward from the cylindrical portion of this embodiment.

[0110] As described above, the CLK(B) and HCLK(B) terminals experience more wear than the LDET(B) and VBAT(B) terminals. In this embodiment, the CLK(B) and HCLK(B) terminals are positioned immediately adjacent to the first claw portion 29a on the fuselage side. That is, the CLK(B) and HCLK(B) terminals are positioned closer to the inner periphery of the first claw portion 29a on the fuselage side than the LDET(B) and / or VBAT(B) terminals. In other words, the distance between the CLK(B) terminal and the inner periphery 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 periphery of the first claw portion 29a on the body side. Furthermore, the distance between the HCLK(B) terminal and the inner periphery 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 periphery of the first claw portion 29a on the body side. As described above, a first leaf spring 41a is provided on the back side of the first claw portion 29a on the body side, and the first leaf spring 41a is used to hold the lens-side first claw portion 39a along the +Z direction (…). Figure 1 Press. From the perspective of the first leaf spring 41a, the distance between the CLK(B) terminal and the first leaf spring 41a, as well as the distance between the HCLK(B) terminal and the first leaf spring 41a, are both shorter than the distance between the LDET(B) terminal and / or the VBAT(B) terminal and the first leaf spring 41a.

[0111] On the lens side, the CLK(L) and HCLK(L) terminals are positioned closer to the inner periphery of the first claw 39a on the lens side than the LDET(L) and / or VBAT(L) terminals. In other words, the distance between the CLK(L) terminal and the inner periphery of the first claw 39a on the lens side is shorter than the distance between the LDET(L) and / or VBAT(L) terminals and the inner periphery of the first claw 39a on the lens side, and the distance between the HCLK(L) terminal and the inner periphery of the first claw 39a on the lens side is also shorter than the distance between the LDET(L) and / or VBAT(L) terminals and the inner periphery of the first claw 39a on the lens side. Therefore, the CLK(L) terminal and HCLK(L) terminal located next to the first claw 39a on the lens side are pressed against the corresponding body-side terminals by the first leaf spring 41a. Therefore, the CLK(B) and HCLK(B) terminals are pressed more forcefully against the lens-side terminals than the LDET(B) and / or VBAT(B) terminals. This ensures good contact and stable communication even if the CLK(B) and / or HCLK(B) terminals experience wear. Furthermore, even if the camera body 2 and / or the interchangeable lens 3 are subjected to an impact while maintaining the mounted state, the contact between the CLK(B) and HCLK(B) terminals and the lens-side terminals remains unchanged.

[0112] In this embodiment, the CLK(B) terminal and the HCLK(B) terminal are also close to the fourth claw portion 29d on the body side. That is, the CLK(B) terminal and the HCLK(B) terminal are positioned closer to the fourth claw portion 29d on the body side than the VBAT(B) terminal and / or the LDET(B) terminal. In other words, the distance between the CLK(B) terminal and the fourth claw portion 29d on the body side is shorter than the distance between the VBAT(B) terminal or the LDET(B) terminal and the fourth claw portion 29d on the body side, and the distance between the HCLK(B) terminal and the fourth claw portion 29d on the body side is shorter than the distance between the VBAT(B) terminal or the LDET(B) terminal and the fourth claw portion 29d on the body side. As described above, a fourth leaf spring 41d is provided on the back side of the fourth claw portion 29d on the body side, and the fourth leaf spring 41d is used to hold the fourth claw portion 39d on the lens side along the +Z direction ( Figure 1 Pressing. Therefore, the CLK(B) terminal and HCLK(B) terminal located near the fourth claw 39d on the lens side are pressed more stably and forcefully to the lens side terminal by the fourth leaf spring 41d than the VBAT(B) terminal and / or LDET(B) terminal.

[0113] The aforementioned distance between the CLK(B) terminal and the first claw 29a on the fuselage side (and the fourth claw 29d on the fuselage side, hereinafter omitted) refers to the straight-line distance between one end of the first claw 29a on the fuselage side and the CLK(B) terminal. Alternatively, the distance between the CLK(B) terminal and the first claw 29a on the fuselage side can be defined as the straight-line distance between the midpoint of the first claw 29a on the fuselage side in the circumferential direction of the fuselage side assembly 21 and the CLK(B) terminal. The distances between other fuselage side terminals such as the HCLK(B) terminal, VBAT(B) terminal, and LDET(B) terminal and the first claw 29a on the fuselage side are also straight-line distances. The distance between the first leaf spring 41a (and the fourth leaf spring 41d) and the fuselage side terminals is also a straight-line distance.

[0114] Furthermore, the distance between the aforementioned CLK(B) terminal and the first claw portion 29a on the fuselage side (and the fourth claw portion 29d on the fuselage side, hereinafter omitted) can be defined as an arc-shaped distance between one end of the first claw portion 29a on the fuselage side and the CLK(B) terminal in the circumferential direction of the fuselage side fitting 21, or as an arc-shaped distance between the other end of the first claw portion 29a on the fuselage side and the CLK(B) terminal. Alternatively, the aforementioned distance between the CLK(B) terminal and the first claw portion 29a on the fuselage side can also be defined as an arc-shaped distance between the middle position of the first claw portion 29a on the fuselage side and the CLK(B) terminal in the circumferential direction of the fuselage side fitting 21. The distance between other fuselage side terminals such as the HCLK(B) terminal, VBAT(B) terminal, and / or LDET(B) terminal and the first claw portion 29a on the fuselage side is also an arc-shaped distance. The distance between the first leaf spring 41a (the fourth leaf spring 41d) and the side terminal of the fuselage is also an arc-shaped distance.

[0115] The camera body 2 has been described above, and the lens replacement 3 follows the same procedure. In this embodiment, the CLK(L) terminal and the HCLK(L) terminal are positioned immediately next to the first claw 39a on the lens side. That is, the CLK(L) terminal and the HCLK(L) terminal are positioned closer to the first claw 39a on the lens side than the VBAT(L) terminal and the LDET(L) terminal. In other words, the distance between the CLK(L) terminal and the first claw 39a on the lens side is shorter than the distance between the VBAT(L) terminal or the LDET(L) terminal and the first claw 39a on the lens side, and the distance between the HCLK(L) terminal and the first claw 39a on the lens side is shorter than the distance between the VBAT(L) terminal or the LDET(L) terminal and the first claw 39a on the lens side. The first claw 39a on the lens side is driven by the first leaf spring 41a on the body side along the +Z direction ( Figure 1Press. Therefore, similarly to the above, the CLK(L) terminal and HCLK(L) terminal located near the first claw 39a on the lens side are pressed more forcefully against the body-side terminal than the VBAT(L) terminal or LDET(L) terminal by the first leaf spring 41a.

[0116] In this embodiment, such as Figure 5 As shown in (a), the CLK(B) terminal and the HCLK(B) terminal are positioned within a fan-shaped area (within an angle of 50°) formed by the center 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 first claw portion 29a on the body side. Alternatively, the CLK(B) terminal and the HCLK(B) terminal are positioned within a triangular area formed by the center of the opening of the fitting 21 (i.e., the position of the optical axis O of the interchangeable lens 3) and the two ends of the inner periphery of the first claw portion 29a on the body side. Therefore, the first claw portion 29a on the body side is absent at the center of the opening of the connecting fitting 21 and on the extension line of the dotted line 51 of the LDET(B) terminal, while the first claw portion 29a on the body side is present at the center of the opening of the connecting fitting 21 and on the extension line of the dotted line 52 of the HCLK(B) terminal, and on the extension line of the dotted line 53 of the CLK(B) terminal. Thus, in the assembled state, the CLK(B) terminal and the HCLK(B) terminal are pressed more forcefully onto their respective lens-side terminals than the LDET(B) terminal.

[0117] like Figure 6As shown, the CLK(L) terminal and the HCLK(L) terminal are positioned within a fan-shaped area (angle 60°) formed by the center of the opening of the fitting 31 (i.e., the position of the optical axis O of the replacement lens 3) and the arc-shaped lens-side first claw portion 39a. Alternatively, the CLK(L) terminal and the HCLK(L) terminal are positioned within a triangular area formed by the center of the opening of the fitting 31 (i.e., the position of the optical axis O of the replacement lens 3) and the two ends of the outer periphery of the lens-side first claw portion 39a. Therefore, the lens-side first claw portion 39a is not present on the extension line of the dotted line 61 connecting the center of the opening of the fitting 31 and the LDET(L) terminal, but it is present on the extension line of the dotted line 62 connecting the center of the opening of the fitting 31 and the HCLK(L) terminal, and on the extension line of the dotted line 63 connecting the center of the opening of the fitting 31 and the CLK(L) terminal. Therefore, in the fully assembled state, the CLK(L) and HCLK(L) terminals make more stable contact with the corresponding body-side terminals than the LDET(L) terminal. In other words, the CLK(L) and HCLK(L) terminals are pressed against the body-side terminals under a stronger force than the LDET(L) terminal. Thus, even if the front ends of the CLK(B) and HCLK(B) terminals are worn, the camera body 2 and the interchangeable lens 3 can still stably communicate clock signals.

[0118] It is also possible to make the following modifications, and one or more modifications can be combined with the above-described embodiments.

[0119] (Variation Example 1)

[0120] It is also possible to configure a terminal used in command data communication or hotline communication to also send a power-on signal from the interchangeable lens 3 to the camera body 2. For example, a power switch function can be provided for the interchangeable lens 3. When the interchangeable lens 3 is in the installed 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, for example, via the lens-side communication unit 34. If the camera body-side control unit 23 detects the power-on signal via the camera body-side communication unit 24 and by means of the RDY(B) terminal, it will change the camera system 1 from the power-off state to the power-on state in the same way as when the power switch (not shown) provided on the camera body 2 is operated.

[0121] (Variation Example 2)

[0122] In this embodiment, a DATAB(B) terminal is arranged on the front end side of the CLK(B) terminal in the mounting direction, and a DATAL(B) terminal is arranged on the rear end side. However, the positions of the DATAB(B) terminal and the DATAL(B) terminal can also be interchanged. That is, the DATAL(B) terminal, the CLK(B) terminal, and the DATAB(B) terminal can also be arranged sequentially from the front end side in the mounting direction.

[0123] Furthermore, in the above embodiments, a camera interchangeable lens was used as an example of an accessory, but accessories are not limited to interchangeable lenses. For example, it could be a teleconverter and / or a wide-angle converter, an extension tube, etc., that are attached between the camera body and the interchangeable lens to change the focal distance of the interchangeable lens. Alternatively, it could be a mounting adapter that allows accessories, including interchangeable lenses of other accessory standards, to be attached to the aforementioned camera body. That is, any accessory used on an accessory attached to the camera body can be used in the same way. In this case, the lens-side terminal group, lens-side claw 39, lens-side communication section 34, etc., correspond to the accessory-side terminal group, accessory-side protrusion, accessory-side communication section, etc., of each accessory.

[0124] In the above embodiments, an accessory is provided that can be detached from the camera body and installed on the camera body. However, the camera body may also be a mounting adapter that allows the replacement lens of the above-mentioned accessory standard to be attached to a camera body that is different from the above-mentioned accessory standard, or it may be configured to allow the accessory to be attached to the mounting adapter.

Claims

1. An accessory that is mounted on a camera body, the camera body having a plurality of camera-side terminals, a camera-side protrusion protruding towards the center of an opening in a lens mounting portion, and an elastic member disposed at a position corresponding to the camera-side protrusion, the accessory comprising: The first terminal is a terminal that contacts the camera-side first terminal among the plurality of camera-side terminals, and changes the voltage of the camera-side first terminal by contacting the camera-side first terminal; The 8th terminal, which is in contact with the camera-side first clock terminal among the plurality of camera-side terminals, is input with the first clock signal used in the transmission of the first data signal from the camera body to the accessory; The 10th terminal is a terminal that contacts the camera-side second clock terminal among the plurality of camera-side terminals, and outputs the second clock signal used in the transmission of the second data signal from the accessory to the camera body; and The accessory-side protrusion is pushed towards the camera body by the elastic member. The 8th terminal and the 10th terminal are positioned at a distance from the accessory-side protrusion that is shorter than the distance between the 1st terminal and the accessory-side protrusion.

2. The accessory according to claim 1, The protruding part on the side of the accessory has a contact portion that contacts the elastic component. The 8th terminal and the 10th terminal are positioned at a distance from the contact portion that is shorter than the distance between the 1st terminal and the contact portion.

3. The accessory according to claim 2, When the accessory is installed on the camera body, the first terminal contacts the first terminal on the camera side, thereby changing the voltage of the first terminal on the camera side.

4. The accessory according to claim 2 or 3, It has a seventh terminal that contacts the first data terminal on the camera side of one of the plurality of camera-side terminals. The accessory-side protrusion moves along the circumferential direction from an insertion position between the plurality of camera-side protrusions and a mounting position where the contact portion contacts the camera-side protrusion. During the movement of the seventh terminal from the insertion position to the attachment position, it contacts the first data terminal on the camera side after contacting the first clock terminal on the camera side and the second clock terminal on the camera side.

5. The accessory according to claim 4, The 7th terminal receives the 1st data signal from the camera body.

6. The accessory according to any one of claims 2 to 5, It has a 9th terminal, which is in contact with the camera-side 3rd data terminal among the plurality of camera-side terminals, and uses the 1st clock signal to output a 3rd data signal to the camera body. The accessory-side protrusion moves along the circumferential direction from an insertion position between the plurality of camera-side protrusions and a mounting position where the contact portion contacts the camera-side protrusion. During the movement of the 9th terminal from the insertion position to the attachment position, it contacts the 3rd data terminal on the camera side after contacting the 2nd clock terminal on the camera side.

7. The accessory according to claim 6, The device has an eleventh terminal that contacts the eleventh camera-side terminal of the plurality of camera-side terminals, and the eleventh camera-side terminal receives the second data signal using the second clock signal. The 10th terminal is disposed between the 9th terminal and the 11th terminal.

8. The accessory according to any one of claims 4 to 7, The camera-side first terminal only contacts the first terminal during the movement from the insertion position to the attachment position.

9. The accessory according to any one of claims 4 to 8, The first terminal is positioned at the foremost point in the direction of movement of the accessory as it moves from the insertion position to the attachment position.

10. The accessory according to any one of claims 4 to 9, It has a second terminal that contacts the second camera-side terminal, a third terminal that contacts the third camera-side terminal, a fourth terminal that contacts the fourth camera-side terminal, a fifth terminal that contacts the fifth camera-side terminal, a sixth terminal that contacts the sixth camera-side terminal, a seventh terminal that contacts the seventh camera-side terminal, a ninth terminal that contacts the ninth camera-side terminal, and an eleventh terminal that contacts the eleventh camera-side terminal. The first terminal is disposed at the foremost position among the first terminal, the second terminal, the third terminal, the fourth terminal, the fifth terminal, the sixth terminal, the seventh terminal, the eighth terminal, the ninth terminal, the tenth terminal, and the eleventh terminal in the moving direction of the accessory as it moves from the insertion position to the attachment position.

11. The accessory according to claim 10, The second terminal is in contact with the second terminal on the camera side, and the second terminal on the camera side supplies the first power. The third terminal is in contact with the third terminal on the camera side, and the third terminal on the camera side is the first ground terminal corresponding to the first power supply. The fourth terminal is in contact with the fourth terminal on the camera side, and the fourth terminal on the camera side supplies a second power different from the first power. The fifth terminal is in contact with the fifth terminal on the camera side, and the fifth terminal on the camera side is the second grounding terminal corresponding to the second power supply. The sixth terminal is in contact with the sixth terminal on the camera side, and the sixth terminal on the camera side detects whether communication synchronized with the first clock signal is possible. The seventh terminal is in contact with the seventh terminal on the camera side, and the seventh terminal on the camera side outputs the first data signal from the camera body to the accessory in a manner synchronized with the first clock signal. The 9th terminal is in contact with the 9th terminal on the camera side, and the 9th terminal on the camera side inputs the 3rd data signal from the accessory to the camera body in a manner synchronized with the 1st clock signal. The 11th terminal is in contact with the 11th terminal on the camera side, and the 11th terminal on the camera side inputs the second data signal from the accessory to the camera body in a manner synchronized with the second clock signal.

12. The accessory according to claim 11, The first terminal, the second terminal, the third terminal, the fourth terminal, the fifth terminal, the sixth terminal, the seventh terminal, the eighth terminal, the ninth terminal, the tenth terminal, and the eleventh terminal are arranged sequentially along the moving direction of the accessory as it moves from the insertion position to the mounting position.

13. The accessory according to any one of claims 1 to 12, The accessory mentioned is a replacement lens.

Images