JP2013080210A - Interchangeable lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interchangeable lens capable of being mounted in a smooth manner.SOLUTION: An interchangeable lens is mounted on a camera body having 12 body-side connection terminals arranged in the vicinity of a body-side mount part of the camera body. The interchangeable lens is provided with: a lens-side mount part having a mount center; a holding part with 12 lens-side connection terminals to be connected with the 12 body-side connection terminals respectively and a lens-side spare terminal not to be connected with any one of the 12 body-side connection terminals arranged thereon; an optical system including a driven member that can be driven; and a drive part to drive the driven member. The lens-side spare terminal contacts with at least one of the 12 body-side connection terminals in a process where the camera body is mounted on the lens-side mount part.

Description

  The present invention relates to an interchangeable lens.

  A camera system that performs electrical communication between a camera body and an interchangeable lens is known. For example, Patent Document 1 describes an interchangeable lens having a terminal group for communicating with a camera body and an adapter (for example, an intermediate ring or a rear focus converter). These terminal groups are arranged side by side in an arc shape, and at one end thereof, a terminal group for supplying power from the camera body to the interchangeable lens and the adapter is disposed adjacently.

Japanese Patent Laid-Open No. 7-234432

  The interchangeable lens described in Patent Document 1 has a problem that the interchangeable lens cannot be smoothly attached.

  The interchangeable lens according to claim 1, wherein a camera body having twelve body side connection terminals provided in the vicinity of a body side mount portion of the camera body is attached, and the lens side mount portion having a mount center point; Twelve lens-side connection terminals each having a contact portion that is connected to each of the 12 body-side connection terminals, each contacting the body-side connection terminal, and at least one lens-side spare terminal having a contact portion are mounted on the mount A holding portion arranged in an arc shape with respect to the center point, an optical system including a driven member that can be driven, and a driving portion that drives the driven member, and the twelve lens-side connection terminals include: A first lens side connection terminal to which a drive voltage for operating the drive unit from the camera body is supplied, and a second lens side connection to be a ground terminal corresponding to the drive voltage. A terminal, a third lens side connection terminal to which the first clock signal is input from the camera body, and a fourth lens side connection to which the first data signal is input from the camera body in synchronization with the first clock signal. A sixth lens side connection terminal that receives a second clock signal from the camera body, and a fifth lens side connection terminal that outputs a second data signal to the camera body in synchronization with the first clock signal. A seventh lens side connection terminal that outputs a third data signal to the camera body in synchronization with the second clock signal, and a first asynchronous signal that is not synchronized with the first clock signal and the second clock signal. An eighth lens side connection terminal that outputs to the camera body, and a second asynchronous signal that is not synchronized with the first clock signal and the second clock signal are the camera body. A ninth lens side connection terminal inputted from the tenth lens side, a tenth lens side connection terminal for outputting a third asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body, and the eighth lens side Based on the first asynchronous signal output from the connection terminal and the first clock signal input at the third lens side connection terminal, the first data from the camera body using the fourth lens side connection terminal. Signal reception and transmission of the second data signal to the camera body using the fifth lens side connection terminal, and the second asynchronous signal input at the ninth lens side connection terminal, Based on the third asynchronous signal output from the tenth lens side connection terminal and the second clock signal input from the sixth lens side connection terminal, the seventh lens An operating voltage for transmitting the third data signal to the camera body using a camera-side connecting terminal is an eleventh lens-side connecting terminal supplied from the camera body, and a ground terminal corresponding to the operating voltage. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is 12 A contact portion of two terminals arbitrarily selected from the lens side connection terminal and the lens side spare terminal is the largest of the inner angles formed with respect to the mount center point, and the eleventh lens side connection terminal The inner angle formed by the contact portion and the contact portion of the twelfth lens side connection terminal with respect to the mount center point is any of the tenth lens side connection terminal to the first lens side connection terminal. The one contact portion and the contact portion of the eleventh lens side connection terminal are smaller than the inner angle formed with respect to the mount center point, and the contact portion of the third lens side connection terminal and the eleventh lens side connection The internal angle formed by the contact portion of the terminal with respect to the mount center point is from the first lens side connection terminal, the second lens side connection terminal, and the fourth lens side connection terminal to the tenth lens side connection terminal. Any one of the contact portion and the contact portion of the eleventh lens side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the contact portion of the fourth lens side connection terminal and the eleventh portion. The inner angle formed by the contact portion of the lens side connection terminal with respect to the mount center point is the front from the first lens side connection terminal, the second lens side connection terminal, and the fifth lens side connection terminal. The contact portion of any one of the tenth lens side connection terminals and the contact portion of the eleventh lens side connection terminal is smaller than the inner angle formed with respect to the mount center point, and the contact portion of the fifth lens side connection terminal The inner angle formed by the contact portion and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the first lens side connection terminal, the second lens side connection terminal, and the sixth lens side connection. The contact portion of any one of the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal is smaller than the inner angle formed with respect to the mount center point, and the eighth lens side connection The internal angle formed by the contact portion of the terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the first lens side connection terminal, the second lens side connection terminal, The contact portion of any one of the sixth lens side connection terminal, the seventh lens side connection terminal, the ninth lens side connection terminal, and the tenth lens side connection terminal and the eleventh lens side connection terminal An inner angle formed by the contact portion with respect to the mount center point, and an inner angle formed by the contact portion of the ninth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point. Is the contact of any one of the first lens side connection terminal, the second lens side connection terminal, the sixth lens side connection terminal, the seventh lens side connection terminal, and the tenth lens side connection terminal. And the contact portion of the eleventh lens side connection terminal are smaller than the inner angle formed with respect to the mount center point, and the contact portion of the tenth lens side connection terminal and the eleventh lens side connection terminal The inner angle formed by the contact portion with respect to the mount center point is the first lens side connection terminal, the second lens side connection terminal, the sixth lens side connection terminal, or the seventh lens side connection terminal. Any one of the contact portions and the contact portion of the eleventh lens side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the contact portion of the sixth lens side connection terminal and the eleventh lens side An internal angle formed by the contact portion of the connection terminal with respect to the mount center point is any one of the first lens side connection terminal, the second lens side connection terminal, and the seventh lens side connection terminal. The contact portion and the contact portion of the eleventh lens side connection terminal are smaller than the inner angle formed with respect to the mount center point, and the contact portion of the seventh lens side connection terminal and the eleventh lens side connection terminal An inner angle formed by the contact portion with respect to the mount center point is the contact angle between any one of the first lens side connection terminal and the second lens side connection terminal and the eleventh lens side connection terminal. An inner angle formed by the contact portion with respect to the mount center point, and an inner angle formed by the contact portion of the second lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point. Is smaller than an inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point, and the contact portion of the lens side spare terminal and the contact portion The inner angle formed by the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the front angle between the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal. It is smaller than the inner angle formed with respect to the mount center point.

  According to the present invention, it is possible to smoothly attach the interchangeable lens.

It is the perspective view which showed the lens-interchangeable camera system to which this invention is applied. It is sectional drawing which showed the lens-interchangeable camera system to which this invention is applied. It is a schematic diagram which shows the detail of the holding | maintenance part 102,202. FIG. 6 is a front view of the body-side mount unit 101. 4 is a front view of a lens side mount unit 201. FIG. It is a timing chart which shows the example of command data communication. It is a timing chart which shows the example of hotline communication. It is sectional drawing which showed the lens management apparatus which can attach or detach the interchangeable lens. 4 is a schematic diagram illustrating details of a holding unit 302. FIG. It is a schematic diagram which shows the detail of each holding | maintenance part of the camera system which concerns on 2nd Embodiment. It is the perspective view which showed the camera system which concerns on 3rd Embodiment. It is a front view of the adapter side 2nd mount part 703. FIG. It is a front view of the holding | maintenance part 202 in 4th Embodiment. It is the front view and sectional drawing of the 8th lens side connection terminal LP8 in 4th Embodiment. It is a front view of the holding | maintenance part 202 which shows an example of arrangement | positioning of a lens side connection terminal.

(First embodiment)
FIG. 1 is a perspective view showing an interchangeable lens type camera system to which the present invention is applied. FIG. 1 shows only devices and apparatuses according to the present invention, and illustration and description of other devices and apparatuses are omitted. The camera 1 includes a camera body 100 and an interchangeable lens 200 that can be attached to and detached from the camera body 100.

  The camera body 100 is provided with a body-side mount 101 having a bayonet structure to which the interchangeable lens 200 is detachably attached. Twelve body-side connection terminals are held at a position in the vicinity of the body-side mount portion 101 (inner peripheral side of the body-side mount portion 101) while partially protruding toward the inner peripheral side of the body-side mount portion 101. A holding part (electrical connection part) 102 is provided.

  In addition, the interchangeable lens 200 is provided with a lens side mount portion 201 corresponding to the body side mount portion 101 to which the camera body 100 is detachably attached. In the vicinity of the lens side mount part 201 (inner peripheral side of the lens side mount part 201), 12 lens side connection terminals and 1 A holding part (electrical connection part) 202 for holding the lens side spare terminals is provided.

  An index (not shown) indicating the rotational position provided on the interchangeable lens 200 by aligning the center of the opening of the body-side mount portion 101 with the optical axis of the interchangeable lens 200 and a similar index provided on the camera body 100 , The lens side mount part 201 can be inserted into the body side mount part 101. Thereafter, when the interchangeable lens 200 is rotated counterclockwise as viewed from the front of the camera body 100, the claw of the lens side mount unit 201 enters the rear side of the claw of the body side mount unit 101. When the interchangeable lens 200 is rotated by a predetermined angle, the lens side mount unit 201 is coupled to the body side mount unit 101 (combination of the lens side claw and the body side claw is completed), and the mounting of the interchangeable lens 200 is completed.

  When the interchangeable lens 200 is attached to the camera body 100, a plurality of body side connection terminals provided on the holding portion 102 (detailed later) are connected to a plurality of lens side connections provided on the holding portion 202 (detailed later). Electrically and physically connected to the terminal. These terminals are used for power supply from the camera body 100 to the interchangeable lens 200 and transmission / reception of signals between the camera body 100 and the interchangeable lens 200. Although details will be described later, the lens side spare terminal provided in the holding portion 202 of the interchangeable lens 200 is not connected to any terminal provided in the holding portion 102 of the camera body 100.

  An image sensor 104 is provided behind the body-side mount 101 in the camera body 100. Above the camera body 100, a button 105 serving as an input device is provided. The user uses the input device such as the button 105 to instruct the camera body 100 to take a picture, set shooting conditions, and the like.

  FIG. 2 is a cross-sectional view showing an interchangeable lens type camera system to which the present invention is applied. The interchangeable lens 200 includes an imaging optical system 210 that forms a subject image. The imaging optical system 210 includes a plurality of lenses 210a to 210c. The plurality of lenses 210a to 210c includes a focusing lens 210b for controlling the focus position of the subject image.

  Inside the interchangeable lens 200, a lens control unit 203 that controls each part of the interchangeable lens 200 is provided. The lens control unit 203 includes a microcomputer (not shown) and its peripheral circuits. The lens control unit 203 is connected to the lens side first communication unit 217, the lens side second communication unit 218, the lens driving unit 212, the lens position detection unit 213, the ROM 215, and the RAM 216.

  The lens side first communication unit 217 and the lens side second communication unit 218 exchange data with the camera body 100 via the terminals of the holding units 102 and 202. Each of the lens side first communication unit 217 and the lens side second communication unit 218 is a communication interface on the interchangeable lens side. The lens control unit 203 performs communication (hotline communication, command data communication) described later with the camera body 100 (body control unit 103 described later) using these communication interfaces.

  The lens driving unit 212 includes an actuator such as a stepping motor, for example, and drives the focusing lens 210b in accordance with a signal input to the lens driving unit 212. The lens position detection unit 213 detects the position of the focusing lens 210b by counting the number of pulses of a signal input to a stepping motor included in the lens driving unit 212, for example. Alternatively, the position of the focusing lens 210b may be detected using a known distance encoder or the like provided in the interchangeable lens 200.

  In addition, a driven member other than the focusing lens 210b may be provided in the interchangeable lens 200. For example, similarly to the focusing lens 210b, a mechanism (power zoom mechanism) that includes a zoom lens as a member that can move in the optical axis direction of the interchangeable lens (imaging optical system 210) and electrically drives the zoom lens. Alternatively, it may be provided in the interchangeable lens 200. In addition, it includes a blur correction lens that can move in a moving direction including a component (X, Y direction component) in a direction perpendicular to the optical axis direction of the imaging optical system 210, and driving the blur correction lens reduces image blur. A blur correction mechanism that performs correction may be provided in the interchangeable lens 200. In addition, an interchangeable lens driving mechanism that controls driving of a diaphragm member (aperture blade) that can move so as to change the size of a diaphragm aperture through which the subject light flux passes may be provided in the interchangeable lens 200. When such a driven member is provided, the lens control unit 203 uses the lens driving unit 212 and the lens position detection unit 213 to drive and position the shake correction lens, the diaphragm member, and the zoom lens. Control detection.

  The ROM 215 is a non-volatile storage medium, and stores a predetermined control program executed by the lens control unit 203 in advance. The RAM 216 is a volatile storage medium and is used as a storage area for various data by the lens control unit 203.

  A shutter 115 for controlling the exposure state of the image sensor 104 and an optical filter 116 combining an optical low-pass filter and an infrared cut filter are provided on the front surface of the image sensor 104. The subject light that has passed through the imaging optical system 210 enters the image sensor 104 via the shutter 115 and the filter 116.

  Inside the camera body 100, a body control unit 103 that controls each part of the camera body 100 is provided. The body control unit 103 includes a microcomputer (not shown), a RAM, and peripheral circuits thereof.

  A body-side first communication unit 117 and a body-side second communication unit 118 are connected to the body control unit 103. The body side first communication unit 117 is connected to the holding unit 102 and can exchange data with the lens side first communication unit 217. Similarly, the body side second communication unit 118 can exchange data with the lens side second communication unit 218. In other words, each of the body-side first communication unit 117 and the body-side second communication unit 118 is a body-side communication interface. The body control unit 103 performs communication (hotline communication and command data communication) described later with the interchangeable lens 200 (lens control unit 203) using these communication interfaces.

  A display device 111 configured by an LCD panel or the like is disposed on the back surface of the camera body 100. The body control unit 103 displays various menu screens for setting an image of a subject (a so-called through image) based on the output of the image sensor 104, shooting conditions, and the like on the display device 111.

(Description of holding units 102 and 202)
FIG. 3 is a schematic diagram showing details of the holding units 102 and 202. As shown in FIG. 3, the body 102 has twelve body side connection terminals BP <b> 1 to BP <b> 12. The holding unit 202 includes twelve lens-side connection terminals LP1 to LP12 corresponding to the twelve body-side connection terminals, and a lens-side spare terminal LPA that does not correspond to any body-side connection terminal. .

  The eleventh body side connection terminal BP11 and the twelfth body side connection terminal BP12 are connected to the first power supply circuit 130 in the camera body 100. The first power supply circuit 130 supplies the operating voltage of each part in the interchangeable lens 200 excluding the lens driving part 212 to the eleventh body side connection terminal BP11. That is, from the eleventh body side connection terminal BP11 and the eleventh lens side connection terminal LP11, each part in the interchangeable lens 200 excluding the lens driving unit 212 (including the lens side first communication unit 217 and the lens side second communication unit 218). ) Operating voltage is supplied. The voltage value that can be supplied to the eleventh body side connection terminal BP11 has a range between the minimum voltage value and the maximum voltage value (for example, a voltage width in the 3V range), but the voltage value that is normally supplied is the maximum voltage value. This is a voltage value in the vicinity of an intermediate value between the value and the minimum voltage value. As a result, the current value supplied from the camera body 100 side to the interchangeable lens 200 side is a current value within a range of about several tens of mA to several hundreds of mA in the power-on state.

  The twelfth body side connection terminal BP12 is a ground terminal corresponding to the operating voltage given to the eleventh body side connection terminal BP11. That is, the twelfth body side connection terminal BP12 and the twelfth lens side connection terminal LP12 are ground terminals corresponding to the above operating voltage.

  In the following description, the signal line constituted by the eleventh body side connection terminal BP11 and the eleventh lens side connection terminal LP11 is referred to as a signal line V33. A signal line formed by the twelfth body side connection terminal BP12 and the twelfth lens side connection terminal LP12 is referred to as a signal line GND. The eleventh lens side connection terminal LP11, the twelfth lens side connection terminal LP12, the eleventh body side connection terminal BP11, and the twelfth body side connection terminal BP12 are for supplying power from the camera body 100 side to the interchangeable lens 200 side. Configure the power supply system terminals.

  The third body side connection terminal BP3, the fourth body side connection terminal BP4, the fifth body side connection terminal BP5, and the eighth body side connection terminal BP8 are connected to the body side first communication unit 117. The third lens side connection terminal LP3, the fourth lens side connection terminal LP4, the fifth lens side connection terminal LP5, and the eighth lens side connection terminal LP8 on the interchangeable lens 200 side corresponding to these body side connection terminals are on the lens side. The first communication unit 217 is connected. The body side first communication unit 117 and the lens side first communication unit 217 transmit and receive data to and from each other using these terminals (communication system terminals). The contents of communication performed by the body-side first communication unit 117 and the lens-side first communication unit 217 will be described in detail later.

  In the following description, a signal line constituted by the third body side connection terminal BP3 and the third lens side connection terminal LP3 is referred to as a signal line CLK. Similarly, a signal line constituted by the fourth body side connection terminal BP4 and the fourth lens side connection terminal LP4 is a signal line BDAT, and a signal constituted by the fifth body side connection terminal BP5 and the fifth lens side connection terminal LP5. The signal line LDAT and the signal line constituted by the eighth body side connection terminal BP8 and the eighth lens side connection terminal LP8 are referred to as a signal line RDY.

  The lens-side first communication unit 217 is connected to the lens-side spare terminal LPA in addition to the lens-side connection terminals described above. The lens side spare terminal LPA is pulled up to a predetermined voltage inside the interchangeable lens 200 by a pull-up resistor (not shown). While the interchangeable lens 200 is attached to the camera body 100, since no terminal on the camera body 100 side is connected to the lens side spare terminal LPA, the input corresponding to the lens side spare terminal LPA of the lens side first communication unit 217. The terminal is kept in a state where a power supply voltage is applied.

  The ninth body side connection terminal BP9, the tenth body side connection terminal BP10, the sixth body side connection terminal BP6, and the seventh body side connection terminal BP7 are connected to the body side second communication unit 118. The ninth lens side connection terminal LP9, the tenth lens side connection terminal LP10, the sixth lens side connection terminal LP6, and the seventh lens side connection terminal LP7 on the interchangeable lens 200 side corresponding to these body side connection terminals are on the lens side. The second communication unit 218 is connected. The lens-side second communication unit 218 transmits data to the body-side second communication unit 118 using these terminals (communication system terminals). The contents of communication performed by the body-side second communication unit 118 and the lens-side second communication unit 218 will be described in detail later.

  In the following description, the signal line constituted by the ninth body side connection terminal BP9 and the ninth lens side connection terminal LP9 is referred to as a signal line HREQ. Similarly, a signal line constituted by the tenth body side connection terminal BP10 and the tenth lens side connection terminal LP10 is a signal line HANS, and a signal line constituted by the sixth body side connection terminal BP6 and the sixth lens side connection terminal LP6. The signal line HCLK and the signal line constituted by the seventh body side connection terminal BP7 and the seventh lens side connection terminal LP7 are referred to as a signal line HDAT.

  The first body side connection terminal BP1 and the second body side connection BP2 are connected to the second power supply circuit 140 in the camera body 100. The second power supply circuit 140 supplies the driving voltage of the lens driving unit 212 to the first body side connection terminal BP1. That is, the driving voltage of the lens driving unit 212 is supplied from the first body side connection terminal BP1 and the first lens side connection terminal LP1. The voltage value that can be supplied to the first body side connection terminal BP1 has a range from the minimum voltage value to the maximum voltage value, all of which are voltage values that can be supplied to the eleventh body side connection terminal BP11. The voltage value is larger than the range (for example, the maximum voltage value that can be supplied to the first body side connection terminal BP1 is several times the maximum voltage value that can be supplied to the eleventh body side connection terminal BP11). That is, the voltage value supplied to the first body side connection terminal BP1 is a voltage value whose magnitude is different from the voltage value supplied to the eleventh body side connection terminal BP11. The voltage value that is normally supplied to the first body side connection terminal BP1 is a voltage value in the vicinity of an intermediate value between the maximum voltage value and the minimum voltage value that can be supplied to the first body side connection terminal BP1. Thus, the current supplied from the camera body 100 side to the interchangeable lens 200 side has a current value of about 10 mA to several A in the power-on state.

  The second body side connection terminal BP2 is a ground terminal corresponding to the drive voltage given to the first body side connection terminal BP1. That is, the second body side connection terminal BP2 and the second lens side connection terminal LP2 are ground terminals corresponding to the drive voltage.

  In the following description, the signal line constituted by the first body side connection terminal BP1 and the first lens side connection terminal LP1 is referred to as a signal line BAT. A signal line formed by the second body side connection terminal BP2 and the second lens side connection terminal LP2 is referred to as a signal line PGND. That is, the first body side connection terminal BP1, the first lens side connection terminal LP1, the second body side connection terminal BP2, and the second lens side connection terminal LP2 are for supplying power from the camera body 100 side to the interchangeable lens 200 side. This constitutes the power supply system terminal.

  The voltage value (current value) supplied to the first body side connection terminal BP1 and the first lens side connection terminal LP1 and the eleventh body side connection terminal BP11 and the eleventh lens side connection terminal LP11 are supplied. As is clear from the magnitude relationship with the voltage value (current value), the currents flowing through the second body side connection terminal BP2 and the second lens side connection terminal LP2 that serve as ground terminals for the voltages supplied to these terminals are respectively shown. The difference between the maximum value and the minimum value is larger than the difference between the maximum value and the minimum value of the current flowing through the twelfth body side connection terminal BP12 and the twelfth lens side connection terminal LP12. This is because the power consumed by the lens driving unit 212 having a driving system such as an actuator is larger than that of an electronic circuit such as the lens control unit 203 in the interchangeable lens 200, and it is not necessary to drive the focusing lens 210b. In some cases, the lens driving unit 212 does not consume power.

  FIG. 4 is a front view of the body-side mount unit 101. 4A is a view of the body side mount portion 101 of the camera body 100 as viewed from the interchangeable lens 200 side, and FIG. 4B is an enlarged view of the holding portion 102 in FIG. 4A. . FIG. 5 is a front view of the lens-side mount unit 201. FIG. 5A shows a state where the lens-side mount unit 201 of the interchangeable lens 200 is viewed from the camera body 100 side. FIG. 5A shows an enlarged view of the holding unit 202 in FIG. Each mount portion has a circular shape, and the center of the circle is referred to as a mount center point O in the following description.

  As shown in FIG. 4A, the holding portion 102 is disposed in a place (the back side of the paper surface in FIG. 4A) that is deeper than the mount surface of the body-side mount portion 101. Further, as shown in FIG. 5A, a holding portion 202 is disposed at a location protruding from the mount surface of the lens side mount portion 201 (the front side in FIG. 5A). When the body-side mount unit 101 and the lens-side mount unit 201 are coupled by the above-described procedure and the interchangeable lens 200 is attached to the camera body 100, the holding unit 102 and the holding unit 202 are connected and are provided in both holding units. The twelve body side connection terminals BP1 to BP12 and the twelve lens side connection terminals LP1 to LP12 are connected to each other. 4 and 5, the alternate long and short dash lines drawn on the twelve body side connection terminals BP <b> 1 to BP <b> 12 and the twelve lens side connection terminals LP <b> 1 to LP <b> 12 are when the camera body 100 and the interchangeable lens 200 are coupled. The locus | trajectory of 12 body side connection terminals BP1-BP12 in is shown. Since such a mount structure is well known, further explanation is omitted.

  As shown in FIG. 4A, each of the twelve body side connection terminals BP1 to BP12 has a cylindrical shape, and the body side mount portion 101 is provided by a spring or the like provided inside the holding portion 102. Is biased in the front direction (direction of the interchangeable lens 200). Further, as shown in FIG. 5A, each of the twelve lens side connection terminals LP1 to LP12 and the one lens side spare terminal LPA has a shape in which a substantially rectangular conductor is exposed on the surface of the holding portion 202. Yes. When the holding unit 102 is connected to the holding unit 202, each body-side connection terminal is pressed against each lens-side connection terminal by the above urging, and the lens-side connection terminal and the body-side connection terminal are electrically connected. In FIG. 5A and FIG. 5B, the circles drawn over the twelve lens side connection terminals LP1 to LP12 are circles indicating the pressing positions of the corresponding body side connection terminals.

  In the following description, for each of the twelve lens side connection terminals LP1 to LP12 and the lens side spare terminal LPA, a region that contacts the body side connection terminal when the camera body 100 and the interchangeable lens 200 are combined in the entire lens side terminal. (A region indicated by a circle in FIG. 5A) is referred to as a contact portion. Further, “when the camera body 100 and the interchangeable lens 200 are coupled” refers to a time when a voltage is supplied from the eleventh body side connection terminal BP11 to the eleventh lens side connection terminal LP11. However, with respect to the lens spare terminal LPA, in the process of attaching the camera body 100 and the interchangeable lens 200, a region that can contact the body side connection terminals BP1 to BP12 (a region around the dashed line in FIG. 5A) is defined as a contact portion. Called. In the present embodiment, the lens-side connection terminal and the lens-side spare terminal are not limited to a substantially rectangular area (including a contact portion) exposed on the surface of the holding portion 202 shown by hatching in FIG. This is a name including an electrical wiring (a lead wire, a flexible cable, etc.) for connecting the substantially rectangular area to the lens side first communication unit 217 and the lens side second communication unit 218. In addition, the region exposed on the surface of the holding portion 202 indicated by hatching as described above is hereinafter referred to as an exposed region of the lens side connection terminals LP1 to LP12 and the lens side spare terminal LPA. is there. In the following description, the “center portion of the lens side connection terminal” refers to the center of the exposed region of the lens side connection terminal, as illustrated by a black dot in FIG. The exposed area will be described later in detail with reference to FIG.

  As shown in FIG. 5A, the holding unit 202 of the lens side mount unit 201 has 12 lens side connection terminals LP1 to LP12 (exposed areas) and lens side spare terminals LPA (exposed areas). Arranged in a circular arc shape (arc shape) around the mount center point O in the direction along the lens side mount portion 201 (in a circular arc direction along a part of the lens side mount portion 201 having a substantially circular outer appearance). .

  Hereinafter, the positional relationship between the twelve lens side connection terminals LP1 to LP12 (exposed areas) will be described with reference to FIG. The internal angle θ11 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is arbitrarily selected from the 12 lens side connection terminals LP1 to LP12. Further, the contact portion between the two lens side connection terminals is the largest inside angle formed with respect to the mount center point O.

  The internal angle θ1 formed by the contact portion of the eleventh lens side connection terminal LP11 and the contact portion of the twelfth lens side connection terminal LP12 with respect to the mount center point O is from the first lens side connection terminal LP1 to the tenth lens side connection terminal LP10. Among them, the contact portion of any one of the lens side connection terminals and the contact portion of the eleventh lens side connection terminal LP11 are smaller than the inner angles θ2 to θ11 formed with respect to the mount center point O. The internal angle θ2 formed by the contact portion of the third lens side connection terminal LP3 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. , And the contact portion of any one of the fourth lens side connection terminal LP4 to the tenth lens side connection terminal LP10 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O. The inner angles formed are smaller than θ3 to θ11.

  The internal angle θ3 formed by the contact portion of the fourth lens side connection terminal LP4 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. , And the contact portion of any one of the fifth lens side connection terminal LP5 to the tenth lens side connection terminal LP10 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O. It is smaller than the inner angles θ4 to θ11 formed. The internal angle θ4 formed by the contact portion of the fifth lens side connection terminal LP5 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. , And the contact portion of any one of the sixth lens side connection terminal LP6 to the tenth lens side connection terminal LP10 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O. The inner angle formed is smaller than θ5 to θ11.

  The internal angle θ5 formed by the contact portion of the eighth lens side connection terminal LP8 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. The contact portion of any one of the sixth lens side connection terminal LP6, the seventh lens side connection terminal LP7, the ninth lens side connection terminal, and the tenth lens side connection terminal LP10 and the eleventh lens side. The contact portion of the connection terminal LP11 is smaller than the inner angles θ6 to θ11 formed with respect to the mount center point O. The internal angle θ6 formed by the contact portion of the ninth lens side connection terminal LP9 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. The contact part of the lens side connection terminal of any one of the sixth lens side connection terminal LP6, the seventh lens side connection terminal LP7, and the tenth lens side connection terminal LP10 and the contact part of the eleventh lens side connection terminal LP11 are mounted. It is smaller than the internal angles θ7 to θ11 formed with respect to the center point O.

  The internal angle θ7 formed by the contact portion of the tenth lens side connection terminal LP10 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. The contact portion of any one of the sixth lens side connection terminal LP6 and the seventh lens side connection terminal LP7 and the contact portion of the eleventh lens side connection terminal LP11 are in relation to the mount center point O. It is smaller than the inner angles θ8 to θ11 formed. The internal angle θ8 formed by the contact portion of the sixth lens side connection terminal LP6 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. The contact portion of any one of the seventh lens side connection terminals LP7 and the contact portion of the eleventh lens side connection terminal LP11 is smaller than the inner angles θ9 to θ11 formed with respect to the mount center point O.

  The internal angle θ9 formed by the contact portion of the seventh lens side connection terminal LP7 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the first lens side connection terminal LP1 and the second lens side connection terminal LP2. Among them, the contact portion of any one of the lens side connection terminals and the contact portion of the eleventh lens side connection terminal LP11 are smaller than inner angles θ10 and θ11 formed with respect to the mount center point O. The internal angle θ10 formed by the contact portion of the second lens side connection terminal LP2 and the contact portion of the eleventh lens side connection terminal LP11 with respect to the mount center point O is the contact portion of the first lens side connection terminal LP1 and the eleventh lens side. The contact portion of the connection terminal LP11 is smaller than the internal angle θ11 formed with respect to the mount center point O.

  The twelve lens side connection terminals LP1 to LP12 (exposed areas thereof) are arranged in the holding portion 202 in the positional relationship as described above. Further, in the present embodiment, the lens side spare terminal LPA is disposed between the twelfth lens side connection terminal LP12 and the third lens side connection terminal LP3. Except for the twelfth lens side connection terminal LP12 and the third lens side connection terminal LP3, each lens side connection terminal has an exposed region of the same shape, and the interval between the connection terminals is also equal. On the other hand, the twelfth lens side connection terminal LP12 and the third lens side connection terminal LP3 have a smaller (thin) exposed region than the other lens side connection terminals. The lens side spare terminal LPA has an exposed region having the same shape as the twelfth lens side connection terminal LP12 and the third lens side connection terminal LP3. The distance between the twelfth lens side connection terminal LP12 and the third lens side connection terminal LP3 is narrower (shorter) than the distance between the connection terminals described above. That is, the lens side spare terminal LPA reduces the space where the exposed regions of the twelfth lens side connection terminal LP12 and the third lens side connection terminal LP3 should be disposed, so that these two lens side connection terminals LPA can be connected. Additional terminals inserted between terminals. Although the exposed areas of the twelfth lens side connection terminal LP12 and the third lens side connection terminal LP3 are smaller than the exposure areas of the other lens side connection terminals, they are sufficiently large for connection to the body side connection terminal. Yes. The shape of the lens side spare terminal LPA (exposed area thereof) may be different from the lens side connection terminal or may be the same shape. In addition, arrange | positioning in the middle means that it arrange | positions on the same circular arc as the 12 lens side connection terminals LP1-LP12 arrange | positioned at circular arc shape with respect to the mount center point.

  It should be noted that among the third lens side connection terminal LP3 to the tenth lens side connection terminal LP10, which are communication system terminals (communication system terminals), and the power supply system terminal, the power supply voltage (the operation voltage and the drive voltage described above) Between the first lens side connection terminal LP1 and the eleventh lens side connection terminal LP11 to be supplied, the second lens side connection terminal LP2 and the twelfth lens side connection terminal LP12 which are the ground terminals (ground terminals) are arranged. The reason is that the influence of the power supply system terminal (signal line) on the communication system terminal (signal line) is minimized.

  A signal line for supplying a power supply voltage (a signal line including the first lens side connection terminal LP1 and the eleventh lens side connection terminal LP11) undergoes a large voltage change according to a load variation at the supply destination of the power supply voltage. This large voltage change may adversely affect the communication system signal lines. In order to suppress this adverse effect, in the present embodiment, a ground terminal (second lens side connection terminal) whose voltage change is more stable than the power supply terminals (first lens side connection terminal LP1 and eleventh lens side connection terminal LP11). LP2 and the twelfth lens side connection terminal LP12 are connected to a communication system terminal (third lens side connection terminal LP3 to tenth lens side connection terminal LP10) and a power supply terminal (first lens side connection terminal LP1 and eleventh lens side connection terminal). LP11).

  The third lens side connection terminal LP3, the fourth lens side connection terminal LP4, the fifth lens side connection terminal LP5, the eighth lens side connection terminal LP8, and the lens side second connected to the lens side first communication unit 217. The ninth lens side connection terminal LP9, the tenth lens side connection terminal LP10, the sixth lens side connection terminal LP6, and the seventh lens side connection terminal LP7 connected to the communication unit 218 are arranged next to each other. The third lens side connection terminal LP3, the fourth lens side connection terminal LP4, and the fifth lens side connection terminal LP5 of the lens side first communication unit 217 and the sixth lens side connection terminal LP6 of the lens side second communication unit 218 and The seventh lens side connection terminal LP7 is configured not to be arranged next to a terminal connected to a different (other) communication unit (217 or 218). That is, the eighth lens side connection terminal LP8, the ninth lens side connection terminal LP9, and the tenth lens side connection terminal LP10 are collectively arranged at a position close to a terminal connected to a different (other) communication unit. ing. As will be described later, the eighth lens side connection terminal LP8, the ninth lens side connection terminal LP9, and the tenth lens side connection terminal LP10 have a signal that is not synchronized with the clock signal (the clock signal or a signal synchronized therewith). This is because a signal having a relatively small change compared to the other, for example, a signal whose state change per unit time is about 1 kHz to several kHz is transmitted. In general, a clock signal and a signal synchronized with the clock signal have a significant change per unit time of about several MHz (as an example, the clock signal is 8 MHz, and the data signal synchronized with the clock signal is 4 MHz (depending on the amount of data)). It tends to be a noise source. Therefore, in order to minimize the influence on communication, it is desirable to arrange such terminals apart from terminals connected to different (other) communication units. Therefore, in the present embodiment, a terminal group (third lens side connection terminal LP3, fourth lens side connection terminal LP4, and fifth lens side connection) that transmits a clock signal and a signal synchronized therewith in the lens side first communication unit 217. The clock signal between the terminal LP5) and a terminal group (sixth lens side connection terminal LP6 and seventh lens side connection terminal LP7) that transmits a clock signal and a signal synchronized therewith in the second lens side communication unit 218. A terminal arrangement is employed in which a group of terminals (eighth lens side connection terminal LP8, ninth lens side connection terminal LP9, and tenth lens side connection terminal LP10) that transmit signals that are not synchronized with each other are interposed.

  The ninth lens side connection terminal LP9, the tenth lens side connection terminal LP10, the sixth lens side connection terminal LP6, and the seventh lens side connection terminal LP7 are close to the second power supply circuit 140, the third lens side connection terminal LP3, The fourth lens side connection terminal LP4, the fifth lens side connection terminal LP5, and the eighth lens side connection terminal LP8 are disposed near the first power supply circuit 130, respectively. This is because the lens side connection terminals LP9, LP10, LP6, and LP7 are less affected by noise. The second power supply circuit 140 supplies power to the lens driving unit 212, but the power consumption of the lens driving unit 212 changes drastically between when the focusing lens 210b is driven and when it is not. Accordingly, the magnitude of the current flowing through the second lens side connection terminal LP2 changes drastically, and the influence on the adjacent communication system terminal is larger than that of the twelfth lens side connection terminal LP12. However, as will be described later, the communication performed using the lens side connection terminals LP9, LP10, LP6, and LP7 has a shorter period than the communication performed using the lens side connection terminals LP3, LP4, LP5, and LP8. (The period of communication using the lens side connection terminals LP9, LP10, LP6, and LP7 is about 1/10 or less of the period of communication using the lens side connection terminals LP3, LP4, LP5, and LP8. In this embodiment, however, communication using the lens side connection terminals LP9, LP10, LP6, and LP7 is performed at a cycle of 1 msec, and communication using the lens side connection terminals LP3, LP4, LP5, and LP8 is performed at a cycle of 16 msec). Even if the communication fails due to the influence of the second lens side connection terminal LP2, the communication is immediately restarted. It is possible. That is, the lens side connection terminals LP9, LP10, LP6, and LP7 are more sensitive to noise than the lens side connection terminals LP3, LP4, LP5, and LP8 even if they are arranged next to the second lens side connection terminal LP2. It can be said that the influence is small.

  The second lens side connection terminal LP2 is arranged next to the seventh lens side connection terminal LP7. This is because the seventh lens side connection terminal LP7 is more resistant to noise than the sixth lens side connection terminal LP6. As will be described later, a clock signal is transmitted to the sixth lens side connection terminal LP6, and a data signal synchronized with this clock signal is transmitted to the seventh lens side connection terminal LP7. If the rising and falling edges of the clock signal become unclear due to the influence of noise, the receiving side cannot correctly synchronize. On the other hand, the data signal is sampled at the signal level at the rising or falling timing of the clock signal. Therefore, it is sufficient that the signal level becomes clear at the above timing, and it can be said that the resistance to noise is higher than that of the clock signal.

  Note that the twelve body-side connection terminals BP1 to BP12 arranged in the holding unit 102 on the camera body 100 side shown in FIG. 4 are the same as the twelve lens-side connection terminals LP1 to LP12 on the interchangeable lens 200 side described above. Therefore, explanation is omitted.

  As described above, the body-side mount portion 101 has a so-called bayonet-type mount structure in which the body-side mount portion 101 is opposed to the lens-side mount portion 201 and then rotated and engaged. For this reason, as shown in FIGS. 4A and 5A, the direction in which the body side connection terminals BP1 to BP12 are arranged is opposite to the direction in which the lens side connection terminals LP1 to LP12 (exposed areas) are arranged. (In FIG. 5, the eleventh lens side connection terminal LP11 is arranged at the left end and the first lens side connection terminal LP1 is arranged at the right end, whereas in FIG. 4, the eleventh body side connection terminal BP11 is arranged. Is arranged at the right end, and the first body side connection terminal BP1 is arranged at the left end).

  When the interchangeable lens 200 is attached to the camera body 100, the lens side mount unit 201 shown in FIG. 5 is rotated clockwise. At this time, the twelve body-side connection terminals BP1 to BP12 provided in the holding unit 102 move along a locus indicated by a dashed line in FIG. 5A while being pressed against the surface of the holding unit 202. To do. That is, the twelve body-side connection terminals BP1 to BP12 friction with the contact portions of the twelve lens-side connection terminals LP1 to LP12 and the lens-side spare terminal LPA in the process of attaching the camera body 100 to the lens-side mount portion 201. Will be. The contact portions of the twelve lens side connection terminals LP1 to LP12 and the lens side spare terminal LPA are configured such that the body side connection terminals BP1 to BP12 can move more smoothly than the surface of the holding portion 202.

(Description of command data communication)
The lens control unit 203 controls the lens-side first communication unit 217 to perform the third lens-side connection terminal LP3, the fourth lens-side connection terminal LP4, the fifth lens-side connection terminal LP5, and the eighth lens-side connection terminal LP8. That is, in parallel with the reception of control data from the body side first communication unit 117 and the transmission of response data to the body side first communication unit 117 via the signal lines CLK, BDAT, LDAT, and RDY, The first predetermined cycle (in this embodiment, 16 milliseconds) is performed. Hereinafter, details of communication performed between the lens-side first communication unit 217 and the body-side first communication unit 117 will be described.

  In the present embodiment, communication performed between the lens control unit 203 and the lens-side first communication unit 217 and the body control unit 103 and the body-side first communication unit 117 is referred to as “command data communication”.

  FIG. 6 is a timing chart showing an example of command data communication. The body control unit 103 and the body-side first communication unit 117 first check the signal level of the signal line RDY at the start of command data communication (T1). The signal level of the signal line RDY indicates whether the lens-side first communication unit 217 can communicate. The lens control unit 203 and the lens side first communication unit 217 output a signal of H (High) level from the eighth lens side connection terminal LP8 when communication is not possible. That is, the signal level of the signal line RDY is set to H level. When the signal line RDY is at the H level, the body control unit 103 and the body-side first communication unit 117 do not start communication until the signal line RDY is at the L level. Also, the next processing during communication is not executed.

  When the signal line RDY is at L (Low) level, the body control unit 103 and the first body side communication unit 117 output the clock signal 401 from the third body side connection terminal BP3. That is, the clock signal 401 is transmitted to the first lens side communication unit 217 via the signal line CLK. In synchronization with the clock signal 401, the body control unit 103 and the body side first communication unit 117 output a body side command packet signal 402, which is the first half of the control data, from the fourth body side connection terminal BP4. That is, the body side command packet signal 402 is transmitted to the first lens side communication unit 217 via the signal line BDAT.

  In addition, when the clock signal 401 is output to the signal line CLK, the lens control unit 203 and the lens side first communication unit 217 synchronize with the clock signal 401 in the first half of the response data from the fifth lens side connection terminal LP5. A certain lens side command packet signal 403 is output. That is, the lens-side command packet signal 403 is transmitted to the first body-side communication unit 117 via the signal line LDAT.

  The lens control unit 203 and the lens side first communication unit 217 set the signal level of the signal line RDY to the H level in response to the completion of transmission of the lens side command packet signal 403 (T2). The lens control unit 203 starts a first control process 404 (described later) that is a process according to the content of the received body-side command packet signal 402.

  When the first control process 404 is completed, the lens control unit 203 notifies the lens side first communication unit 217 of the completion of the first control process 404. In response to this notification, the first lens side communication unit 217 outputs an L level signal from the eighth lens side connection terminal LP8. That is, the signal level of the signal line RDY is set to L level (T3). The body control unit 103 and the body side first communication unit 117 output the clock signal 405 from the third body side connection terminal BP3 in accordance with the change in the signal level. That is, the clock signal 405 is transmitted to the lens side first communication unit 217 via the signal line CLK.

  The body control unit 103 and the body side first communication unit 117 output the body side data packet signal 406 that is the latter half of the control data from the fourth body side connection terminal BP4 in synchronization with the clock signal 405. That is, the body side data packet signal 406 is transmitted to the lens side first communication unit 217 via the signal line BDAT.

  When the clock signal 405 is output to the signal line CLK, the lens control unit 203 and the lens side first communication unit 217 are the second half of the response data from the fifth lens side connection terminal LP5 in synchronization with the clock signal 405. The lens side data packet signal 407 is output. That is, the lens-side data packet signal 407 is transmitted to the first body-side communication unit 117 via the signal line LDAT.

  In response to the completion of transmission of the lens-side data packet signal 407, the lens control unit 203 and the lens-side first communication unit 217 set the signal level of the signal line RDY to the H level again (T4). The lens control unit 203 starts a second control process 408 (described later) that is a process according to the content of the received body-side data packet signal 406.

  Here, the first control process 404 and the second control process 408 performed by the lens control unit 203 will be described.

  For example, a case where the received body-side command packet signal 402 has a content requesting specific data on the interchangeable lens side will be described. As the first control process 404, the lens control unit 203 analyzes the content of the command packet signal 402 and executes a process of generating the requested specific data. Further, as the first control process 404, the lens control unit 203 uses the checksum data included in the command packet signal 402 to easily determine whether there is an error in the communication of the command packet signal 402 from the number of data bytes. The communication error check process to check is also executed. The specific data signal generated in the first control process 404 is output to the body side as a lens-side data packet signal 407. In this case, the body side data packet signal 406 output from the body side after the command packet signal 402 is a dummy data signal (including checksum data) that has no particular meaning for the lens side. In this case, the lens control unit 203 executes the communication error check process as described above using the checksum data included in the body side data packet signal 406 as the second control process 408.

  For example, a case where the received body-side command packet signal 402 is an instruction to drive a lens-side driven member will be described. For example, a case where the command packet signal 402 is an instruction to drive the focusing lens 210b and the received body side data packet signal 406 is the driving amount of the focusing lens 210b will be described. As the first control process 404, the lens control unit 203 analyzes the content of the command packet signal 402 and generates an acknowledgment signal indicating that the content has been understood. Furthermore, the lens control unit 203 also executes the communication error check process as described above using the checksum data included in the command packet signal 402 as the first control process 404. The acknowledge signal generated in the first control process 404 is output to the body side as a lens side data packet signal 407. In addition, as the second control process 408, the lens control unit 203 executes an analysis process of the contents of the body side data packet signal 406 and uses the checksum data included in the body side data packet signal 406 as described above. Execute the check process.

  When the second control process 408 is completed, the lens control unit 203 notifies the lens side first communication unit 217 of the completion of the second control process 408. Accordingly, the lens control unit 203 causes the lens side first communication unit 217 to output an L level signal from the contact LP6. That is, the signal level of the signal line RDY is set to L level (T5).

  If the received body-side command packet signal 402 is an instruction to drive a lens-side driven member (for example, a focusing lens) as described above, the lens control unit 203 sends a signal to the lens-side first communication unit 217. While the signal level of the line RDY is set to L level, the lens driving unit 212 is caused to execute processing for driving the focusing lens 210b by the driving amount.

  The communication performed at the above-described time T1 to time T5 is one command data communication. As described above, in one command data communication, body control unit 103 and body side first communication unit 117 transmit body side command packet signal 402 and body side data packet signal 406 one by one. In other words, the body side command packet signal 402 and the body side data packet signal 406 together constitute one control data although it is divided and transmitted for convenience of processing.

  Similarly, in one command data communication, the lens control unit 203 and the lens side first communication unit 217 transmit the lens side command packet signal 403 and the lens side data packet signal 407 one by one. That is, the lens side command packet signal 403 and the lens side data packet signal 407 are combined to form one response data.

  As described above, the lens control unit 203 and the lens-side first communication unit 217 perform reception of control data from the body-side first communication unit 117 and transmission of response data to the body-side first communication unit 117 in parallel. And do it. The eighth lens side connection terminal LP8 and the eighth body side connection terminal BP8 used for command data communication are asynchronous signals (signal level / H (High) level of the signal line RDY) or L ( (Low) level) is a contact to be transmitted.

(Description of hotline communication)
The lens control unit 203 controls the second lens side communication unit 218 to perform the ninth lens side connection terminal LP9, the tenth lens side connection terminal LP10, the sixth lens side connection terminal LP6, and the seventh lens side connection terminal LP7. That is, the lens position data is transmitted to the body-side second communication unit 118 via the signal lines HREQ, HANS, HCLK, and HDAT. Hereinafter, details of communication performed between the lens-side second communication unit 218 and the body-side second communication unit 118 will be described.

  In the present embodiment, communication performed between the lens control unit 203 and the lens-side second communication unit 218, and the body control unit 103 and the body-side second communication unit 118 is referred to as “hotline communication”.

  FIG. 7 is a timing chart showing an example of hotline communication. The body control unit 103 of the present embodiment is configured to start hot line communication every second predetermined period (for example, 1 millisecond in the present embodiment). This period is shorter than the period for performing command data communication. FIG. 7A is a diagram illustrating a state in which hotline communication is repeatedly performed at predetermined intervals Tn. FIG. 7B shows a state in which a certain communication period Tx is expanded in hot line communication repeatedly executed. Hereinafter, the procedure of hotline communication will be described based on the timing chart of FIG.

  The body control unit 103 and the body side second communication unit 118 first output an L level signal from the ninth body side connection terminal BP9 at the start of hot line communication (T6). That is, the signal level of the signal line HREQ is set to L level. The lens side second communication unit 218 notifies the lens control unit 203 that this signal has been input to the ninth lens side connection terminal LP9. In response to this notification, the lens control unit 203 starts executing a generation process 501 that generates lens position data. The generation process 501 is a process in which the lens control unit 203 causes the lens position detection unit 213 to detect the position of the focusing lens 210b and generates lens position data representing a detection result.

  When the lens control unit 203 completes the generation processing 501, the lens control unit 203 and the second lens side communication unit 218 output an L level signal from the tenth lens side connection terminal LP10 (T7). That is, the signal level of the signal line HANS is set to the L level. The body control unit 103 and the body side second communication unit 118 output the clock signal 502 from the sixth body side connection terminal BP6 in response to the input of this signal to the tenth body side connection terminal BP10. That is, a clock signal is transmitted to the lens side second communication unit 218 via the signal line HCLK.

  The lens control unit 203 and the lens side second communication unit 218 output a lens position data signal 503 representing lens position data from the seventh lens side connection terminal LP7 in synchronization with the clock signal 502. That is, the lens position data signal 503 is transmitted to the body-side second communication unit 118 via the signal line HDAT.

  When the transmission of the lens position data signal 503 is completed, the lens control unit 203 and the lens side second communication unit 218 output an H level signal from the tenth lens side connection terminal LP10. That is, the signal level of the signal line HANS is set to the H level (T8). The body side second communication unit 118 outputs an H level signal from the ninth body side connection terminal BP9 in response to the input of this signal to the tenth body side connection terminal BP10. That is, the signal level of the signal line HREQ is set to H level (T9).

  The communication performed from time T6 to time T9 described above is one hot line communication. As described above, in one hot line communication, one lens position data signal 503 is transmitted by the lens control unit 203 and the second lens side communication unit 218. The ninth lens side connection terminal LP9, the tenth lens side connection terminal LP10, the ninth body side connection terminal BP9, and the tenth body side connection terminal BP10 used for hotline communication are asynchronous signals that are not synchronized with other clock signals. Is a contact to be transmitted. That is, the ninth lens side connection terminal LP9 and the ninth body side connection terminal BP9 are contact points for transmitting asynchronous signals (signal level / H (High) level or L (Low) level of the signal line HREQ). The 10 lens side connection terminal LP10 and the 10th body side connection terminal BP10 are terminals through which asynchronous signals (signal level HANS signal level / H (High) level or L (Low) level) are transmitted.

  Note that the command data communication and the hotline communication can be executed simultaneously or partially in parallel. That is, one of the lens side first communication unit 217 and the lens side second communication unit 218 can communicate with the camera body 100 even when the other is communicating with the camera body 100. is there.

(Explanation of lens management device)
FIG. 8 is a cross-sectional view showing a lens management device to which the interchangeable lens 200 can be attached and detached. The interchangeable lens 200 according to the present embodiment can be attached to and detached from a lens management device 300 different from the camera body 100. The lens management device 300 is a device for performing maintenance of the interchangeable lens 200.

  The lens management device 300 is provided with a management side mount portion 301 having the same structure as the body side mount portion 101 of the camera body 100. Further, in the vicinity of the management-side mount portion 301 (inner peripheral side of the management-side mount portion 301), similar to the body-side mount portion 101, it partially projects toward the inner peripheral side of the management-side mount portion 301. In this state, a holding unit (electrical connection unit) 302 that holds seven management-side connection terminals is provided.

  When the interchangeable lens 200 is attached to the lens management device 300, the plurality of management side connection terminals provided in the holding unit 302 are electrically and physically connected to the plurality of lens side connection terminals provided in the holding unit 202. Connected. These terminals are used for power supply from the lens management device 300 to the interchangeable lens 200 and transmission / reception of signals between the lens management device 300 and the interchangeable lens 200.

  Inside the lens management device 300, a management control unit 303 that controls each part of the lens management device 300 is provided. The management control unit 303 includes a microcomputer (not shown), a RAM, and peripheral circuits thereof.

  A management-side first communication unit 317 is connected to the management control unit 303. The management-side first communication unit 317 is connected to the holding unit 302 and can exchange data with the lens-side first communication unit 217. In other words, the management-side first communication unit 317 is a communication interface on the lens management device 300 side. The management control unit 303 performs the above-described command data communication with the interchangeable lens 200 (lens control unit 203) using this communication interface.

  FIG. 9 is a schematic diagram showing details of the holding unit 302. As shown in FIG. 9A, the holding unit 302 has an eighth management side connection terminal EP8, a fifth management side connection terminal EP5, a fourth management side connection terminal EP4, a management side spare terminal EPA, and a third management side connection. There are a terminal EP3, a twelfth management side connection terminal EP12, and an eleventh management side connection terminal EP11.

  The eleventh management side connection terminal EP11 and the twelfth management side connection terminal EP12 have the same functions as the eleventh body side connection terminal BP11 and the twelfth body side connection terminal BP12, respectively. That is, from the eleventh management side connection terminal EP11 and the eleventh lens side connection terminal LP11, each part in the interchangeable lens 200 excluding the lens driving unit 212 (including the lens side first communication unit 217 and the lens side second communication unit 218). ) Operating voltage is supplied. Further, the twelfth management side connection terminal EP12 is a ground terminal corresponding to the operating voltage given to the eleventh management side connection terminal EP11.

  Similarly, the eighth management side connection terminal EP8, the fifth management side connection terminal EP5, the fourth management side connection terminal EP4, and the third management side connection terminal EP3 are the eighth body side connection terminal BP8 and the fifth body side, respectively. Similar to the connection terminal BP5, the fourth body side connection terminal BP4, and the third body side connection terminal BP3, these are terminals for performing command data communication. The management-side first communication unit 317 performs command data communication with the interchangeable lens 200 through these connection terminals.

  Note that the lens management device 300 according to the present embodiment does not perform the above-described hotline communication with the interchangeable lens 200. Therefore, the connection terminal used for hotline communication is removed from the holding unit 302.

  The management side spare terminal EPA is a communication terminal provided between the third management side connection terminal EP3 and the twelfth management side connection terminal EP12, and is connected to the lens side spare terminal LPA of the interchangeable lens 200. The management side spare terminal EPA is grounded in the lens management device 300. As a result, when the interchangeable lens 200 and the lens management device 300 are coupled, the lens-side spare terminal LPA becomes the ground potential, and an L (Low) level signal is input to the lens-side first communication unit 217. .

  The lens control unit 203 determines whether the camera body 100 is attached to the lens side mount unit 201 or the lens management depending on the signal level of the signal input from the lens side spare terminal LPA to the lens side first communication unit 217. It is determined whether the device 300 is used. When it is determined that the lens management device 300 is attached, a specific management command is received in command data communication. If this “specific management command” is transmitted from the camera body 100, the lens control unit 203 does not accept the command (for example, transmits information indicating an error to the body control unit 103, or simply Ignore).

  The above-mentioned “specific management command” includes, for example, a firmware update command for rewriting the contents of the ROM 215, an operation confirmation command for confirming that each part of the interchangeable lens 200 operates normally, and the like. The manufacturer of the interchangeable lens 200 performs maintenance of the interchangeable lens 200 using the lens management device 300 in, for example, final inspection at the time of product shipment or product repair.

According to the camera system according to the first embodiment described above, the following operational effects can be obtained.
(1) In the process of attaching the lens side spare terminal LPA, which is not connected to any of the 12 body side connection terminals BP1 to BP12, to the holding unit 202 in the process of attaching the camera body 100 to the lens side mount unit 201, It arrange | positioned so that at least 1 body side connection terminal may be contacted among the side connection terminals BP1-BP12. Since it did in this way, while being able to attach an interchangeable lens smoothly, a specific arrangement pattern is comprised on a mount surface and it becomes easy to recognize each terminal.

(2) The lens side spare terminal LPA is configured to be connectable to the management side spare terminal EPA of the lens management device 300 when the camera body 100 is not attached to the lens side mount portion 201. Since it did in this way, the extensibility at the time of attaching apparatuses other than the camera body 100 to the interchangeable lens 200 can be improved.

(Second Embodiment)
FIG. 10 is a schematic diagram showing details of each holding unit of the camera system according to the second embodiment of the present invention. The camera system of the second embodiment to which the present invention is applied is similar to the camera body 800 having the same configuration as the camera body 100 of the first embodiment and the interchangeable lens 200 of the first embodiment. And an interchangeable lens 900 having a configuration. Hereinafter, the camera system according to the second embodiment will be described with reference to FIG. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

  The holding portion 802 of the camera body 800 is the camera body according to the first embodiment except that the second body side terminal BPA is provided at the same position as the management side spare terminal EPA shown in FIG. The holding unit 102 has the same configuration as the 100 holding units 102. The second body side terminal BPA is connected to the body side first communication unit 817 and constitutes a signal line BD2 with the interchangeable lens 900. The signal line BD2 is a signal line for transmitting data from the camera body 800 to the interchangeable lens 900. The first body-side communication unit 817 can transmit data from the signal line BD2 in parallel with the signal line BDAT in the command data communication shown in FIG. That is, the body-side first communication unit 817 of the present embodiment can execute command data communication at a data transmission rate that is approximately twice that of the body-side first communication unit 117 according to the first embodiment. .

  On the other hand, the lens side spare terminal LPA provided in the holding unit 202 of the interchangeable lens 900 is connected to the first lens side communication unit 917 inside the interchangeable lens 900. The lens side first communication unit 917 is the same as that in the first embodiment except that in the command data communication shown in FIG. 6, data can be transmitted from the signal line BD2 in parallel with the signal line BDAT. This is equivalent to the lens side first communication unit 217.

  It is also possible to attach the camera body 100 according to the first embodiment to the interchangeable lens 900 of the present embodiment. However, since the camera body 100 does not have a terminal connected to the lens side spare terminal LPA, data communication using the signal line BD2 described above cannot be performed. When the camera body 100 is attached, the lens control unit 203 performs normal command data communication described in the first embodiment. On the other hand, when the camera body 800 is attached, command data communication using the signal line BD2 described above is performed.

According to the camera system according to the second embodiment described above, the following operational effects can be obtained.
(1) When a camera body 800 that can be attached alternatively to the camera body 100 is attached to the lens side mount portion 201, the lens side spare terminal LPA is connected to the second body side terminal BPA. Since it did in this way, in a new camera body, the function superior to the past can be provided and expandability improves.

(Third embodiment)
FIG. 11 is a perspective view showing a camera system according to the third embodiment. The camera system 3 of this embodiment includes a camera body 100, an intermediate adapter 700 that can be attached to and detached from the camera body 100, and an interchangeable lens 600 that can be attached to and detached from the intermediate adapter 700. In the following description, the same members as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.

  The interchangeable lens 600 has a configuration similar to that of the interchangeable lens 200 according to the first embodiment, and can be attached to the camera body 100 without using the intermediate adapter 700. The intermediate adapter 700 is a so-called teleconverter (telecon). In other words, the intermediate adapter can be used together with the interchangeable lens 600 to increase the focal length of the imaging optical system 210 included in the interchangeable lens 600. The housing of the intermediate adapter 700 has a cylindrical shape. An adapter side first mount portion 701 corresponding to the body side mount portion 101 is provided on one side surface of the intermediate adapter 700. This adapter side first mount portion 701 has the same configuration as the lens side mount portion 201 of the interchangeable lens 200. An adapter-side second mount portion 703 corresponding to the lens-side mount portion 201 is provided on the other side surface of the intermediate adapter 700. The adapter side second mount portion 703 has the same configuration as the body side mount portion 101 of the camera body 100. Note that the shape of the casing of the intermediate adapter 700 is not limited to the cylindrical shape, and may be other shapes. The adapter side first mount part 701 can be detachably attached to the body side mount part 101 of the camera body 100. The adapter-side second mount portion 703 can be detachably attached to the lens-side mount portion 201 of the interchangeable lens 600.

  Similar to the interchangeable lens 200 according to the first embodiment, the adapter side first mount is located near the adapter side first mount portion 701 of the intermediate adapter 700 (inner peripheral side of the adapter side first mount portion 701). A holding portion 702 that holds a plurality of terminals in a state of partially protruding toward the inner peripheral side of the mount portion 701 is provided. The holding unit 702 has the same configuration as the holding unit 202 according to the first embodiment, except that the lens side spare terminal LPA does not exist.

  Further, the intermediate adapter 700 partially protrudes toward the inner peripheral side of the adapter-side second mount portion 703 at a position near the adapter-side second mount portion 703 (inner peripheral side of the adapter-side second mount portion 703). In the state, a holding portion 704 for holding the terminal is provided. The holding portion 704 is provided with a plurality of terminals. When the interchangeable lens 600 is attached to the intermediate adapter 700, the terminals provided on the holding unit 202 are electrically and physically connected to the plurality of terminals provided on the holding unit 704.

  FIG. 12 is a front view of the adapter-side second mount portion 703. Similarly to the body side connection terminals BP1 to BP12 provided in the holding unit 102, the holding unit 704 is provided with adapter side connection terminals AP1 to AP12. These connection terminals are connected to the connection terminals provided in the holding portion 702 inside the intermediate adapter 700. Therefore, the camera body 100 (body control unit 103) can execute the same command data communication and hotline communication as those of the first embodiment via the intermediate adapter 700 with the interchangeable lens 600. .

  The holding unit 704 is further provided with an adapter side spare terminal APA at a position corresponding to the lens side spare terminal LPA. When the interchangeable lens 600 is attached to the intermediate adapter 700, the adapter side spare terminal APA is connected to the lens side spare terminal LPA of the interchangeable lens 600. The adapter side spare terminal APA is grounded inside the intermediate adapter 700.

  When the interchangeable lens 600 is attached to the camera body 100, the lens side spare terminal LPA is not connected to any terminal. In this case, since the lens side spare terminal LPA is pulled up inside the interchangeable lens 600, a signal of H (High) level is input to the lens side first communication unit 217 of the interchangeable lens 600. On the other hand, when the interchangeable lens 600 is attached to the camera body 100 via the intermediate adapter 700, the lens side spare terminal LPA is connected to the adapter side spare terminal APA. In this case, an L (Low) level signal is input to the lens side first communication unit 217 of the interchangeable lens 600. As described above, the signal level of the signal input from the lens-side spare terminal LPA to the lens-side first communication unit 217 changes depending on whether the intermediate adapter 700 is interposed between the camera body 100 and the camera body 100. The lens control unit 203 detects the presence or absence of the intermediate adapter 700 based on the change in the signal level.

According to the camera system of the third embodiment described above, the following operational effects can be obtained.
(1) The lens control unit 203 detects the presence or absence of the intermediate adapter 700 using the lens side spare terminal LPA. Since it did in this way, it becomes possible to detect the presence or absence of the intermediate adapter 700 easily.

(Fourth embodiment)
The camera system of the fourth embodiment to which the present invention is applied has the same configuration as that of the camera system of the first embodiment, but is different from the first embodiment in the surface of the exposed region of the lens side connection terminal. The shape is different. Hereinafter, the surface shape of the exposed region of the lens side connection terminal in the fourth embodiment will be described. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted. The camera body and the lens management device are the same as those in the first embodiment.

  FIG. 13 is a front view of the holding unit 202 according to the fourth embodiment. As shown in FIGS. 13A and 13B, in the present embodiment, twelve lens-side connection terminals LP1 to LP12 and lens-side spare terminals LPA disposed on the holding portion 202 of the lens-side mount portion 201. Has a size that covers from the inner peripheral side (side near the mount center point O) to the outer peripheral side (side far from the mount center point O) of the holding portion 202. However, the size and position of the exposed region are the same as those of the first embodiment shown in FIGS. 5 (a) and 5 (b). Hereinafter, this point will be described with reference to a sectional view of the eighth lens side connection terminal LP8.

  FIG. 14A is an enlarged front view of the eighth lens side connection terminal LP8, and FIG. 14B is a cross-sectional view of the eighth lens side connection terminal LP8 and the holding portion 202. FIG. As shown in the cross-sectional view of FIG. 14B, one end of the metal piece 209 constituting the eighth lens side connection terminal LP8 enters a recess 208 provided on the surface of the holding portion 202. That is, the surface of the metal piece 209 is divided into an exposed region LP8a exposed on the surface of the holding part 202 and a fixing part LP8b for fixing the metal piece 209 to the holding part 202. Then, when viewed from the surface as shown in FIG. 14A, the exposed area looks as if larger than that in FIG. 5, but the size of the exposed area LP8a does not actually change. Accordingly, in the present embodiment, the central portion of the eighth lens side connection terminal LP8 is the central portion 0a of the exposed region, not the central portion 0b of the range including the fixed portion LP8b.

  The exposure area of the eighth lens side connection terminal LP8 in the present embodiment has been described above, but the other eleven lens side connection terminals and the lens side spare terminal LPA are the same as the eighth lens side connection terminal LP8. Therefore, explanation is omitted. That is, the size and position of the exposed areas of the other 11 lens side connection terminals and lens side spare terminals LPA are also the same as those shown in FIG. It is a fixing part for fixing the to the holding part 202. Although the size and position of the exposed region are the same as those in the first embodiment shown in FIGS. 5A and 5B, the size and position of the exposed region are the same. Not necessary.

  According to the camera system of the fourth embodiment described above, the same operational effects as those of the first embodiment can be obtained.

  The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.

(Modification 1)
For example, as shown in FIG. 15, only the exposed region of any one of the twelve lens side connection terminals LP1 to LP12 and the lens side spare terminal LPA (for example, the lens side spare terminal LPA) is held by the holding unit 202. Is located closer to the inner peripheral side (side near the mount center point O), and the exposed areas of the other twelve lens side connection terminals LP1 to LP12 are on the outer peripheral side of the holding portion 202 (side far from the mount center point O). It may be arranged closer. In other words, the distance between the exposed area of at least one lens side connection terminal of the 12 lens side connection terminals and the lens side spare terminal and the mount center point is at least one other lens side connection. You may arrange | position so that the distance between the exposure area | region of a terminal and the said mount center point may differ. In addition, the exposure area | region arrange | positioned near inner peripheral side may be an exposure area | region of terminals other than the lens side spare terminal LPA, and the number may be more than one. Further, the sizes of the exposed areas of the twelve lens side connection terminals LP1 to LP12 and the lens side spare terminal LPA may be the same, or the sizes of the exposed areas of one or more lens side connection terminals. May be different from the size of the exposed area of the other terminals. The distance between the exposed area of at least one lens side connecting terminal and the mount center point among the 12 lens side connecting terminals and the lens side spare terminal is the exposed area of at least one other lens side connecting terminal. And the mount center point are different from each other. Since it did in this way, while being able to attach an interchangeable lens smoothly, a specific arrangement pattern is comprised on a mount surface and it becomes easy to recognize each terminal.

(Modification 2)
In the above-described embodiment, as shown in FIG. 5, the plurality of lens side connection terminals are arranged along the lower edge of the holding portion 202. You may arrange | position these lens side connection terminals in the holding | maintenance part 202 with a form other than this. Further, the plurality of lens side connection terminals may be arranged at any position of the holding portion 202, and the shape of the holding portion 202 is not limited to the shape shown in FIG. 5 and may be any shape.

(Modification 3)
In the above embodiment, the position data of the focusing lens 210b has been described as being transmitted from the interchangeable lens 200 to the camera body 100 by hotline communication. However, the system may be configured to transmit state information of driven members other than the focusing lens using hotline communication. For example, when the interchangeable lens 200 is provided with a shake correction lens for camera shake correction, the position (X, Y position) of the shake correction lens may be transmitted. In addition, the position of the stop in the interchangeable lens (information related to the stop aperture size) may be transmitted. If the interchangeable lens 200 is a zoom lens, information regarding the focal length of the lens may be transmitted. In such a case, as the generation processing 501 shown in FIG. 7B, processing for generating position data of the blur correction lens and control position data of the aperture for forming the aperture stop (position information corresponding to the aperture size) And a process of generating zoom lens position data.

(Modification 4)
In the above-described embodiment, the holding portion 102 (body side) and the holding portion 202 (lens side) are each an integral component (one component). However, each of the holding portions 102 and 202 may be configured to be integrally formed by combining a plurality of holding portion parts divided into several parts (for some terminals).

(Modification 5)
In the above-described embodiment, the communication interface is provided individually for each of the two communications (hotline communications and command data communications). However, these may be integrally formed. That is, on the interchangeable lens side, the lens side first communication unit 217 and the lens side second communication unit 218 may be integrally formed. Similarly, on the camera body side, the body-side first communication unit 117 and the body-side second communication unit 118 may be integrally formed. Further, instead of the body control unit 103 and the lens control unit 203, a body control unit and a lens control unit in which the functions of these communication interfaces are incorporated may be used.

(Modification 6)
In the above embodiment, the camera system including the camera body 100 and the interchangeable lens 200 has been described. However, the present invention is not limited to the camera system. If the electronic device includes a mount that can be attached to and detached from the interchangeable lens 200, can communicate with the interchangeable lens 200, and can supply power to the interchangeable lens, the electronic device can be configured as described in the above embodiment (on the camera body side). Configuration) is applicable. As such an electronic device, for example, a projector can be considered. By configuring the projection lens portion of the projector as a detachable exchangeable projection lens, a projector system similar to the above embodiment can be obtained.

(Modification 7)
In the above-described embodiment, the shake correction mechanism includes a shake correction lens that can move so as to have a component in a direction perpendicular to the optical axis direction of the imaging optical system 210, and the camera shake correction is performed by driving the shake correction lens. Stated what to do. However, the blur correction mechanism is not limited to this, and a blur correction mechanism that rotates (swings) the blur correction optical system in an in-plane direction including the optical axis of the imaging optical system 210 may be used.

(Modification 8)
In the above embodiment, the bayonet structure mount has been described as an example, but the present invention can be applied to a mount other than the bayonet structure. For example, the present invention may be applied to an interchangeable lens having a mount having a different structure such as a screw mount.

(Modification 9)
In each of the embodiments described above, only one lens side spare terminal LPA is provided. Two or more of these may be used. In this case, a different function may be assigned to each lens-side spare terminal, or the same function may be assigned. Further, the position of the lens side spare terminal LPA is not limited to the position shown in FIG. In the process of attaching the camera body 100 to the lens-side mount portion 201, the lens-side spare terminal may be provided at any position as long as it is a position in contact with any of the body-side connection terminals BP1 to BP12.

  As long as the characteristics of the present invention are not impaired, the present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Camera, 100, 800 ... Camera body, 101 ... Body side mount part, 102, 202, 302, 702, 704, 802 ... Holding part, 103 ... Body control part, 117, 817 ... Body side 1st communication part, 118: Body side second communication unit, 200, 600, 900 ... Interchangeable lens, 201 ... Lens side mount unit, 203 ... Lens control unit, 210 ... Imaging optical system, 217, 917 ... Lens side first communication unit, 218 DESCRIPTION OF SYMBOLS 2nd communication part on lens side, 300 ... Lens management apparatus, 301 ... Management side mount part, 303 ... Management control part, 700 ... Intermediate adapter, 701 ... 1st mount part on adapter side, 703 ... 2nd mount part on adapter side

The interchangeable lens according to claim 1, wherein a camera body having twelve body side connection terminals provided in an arc shape is attached in the vicinity of the body side mount portion of the camera body, and has a mount center point. And twelve body-side connecting terminals that are connected to each of the twelve body-side connecting terminals when coupled to the camera body , each having a contact portion that contacts the corresponding body-side connecting terminal and having an exposed area exposed on the surface . A lens-side connection terminal, a holding portion in which at least one lens-side spare terminal having an exposed area exposed on the surface is arranged in an arc shape with respect to the mount center point, and an optical system including a drivable driven member A drive unit that drives the driven member, and the twelve lens-side connection terminals are configured to drive electric power for operating the drive unit from the camera body. A first lens side connection terminal to which is supplied, a second lens side connection terminal to be a ground terminal corresponding to the drive voltage, a third lens side connection terminal to which a first clock signal is input from the camera body, A fourth lens side connection terminal to which a first data signal is input from the camera body in synchronization with the first clock signal, and a second data signal to the camera body in synchronization with the first clock signal. A third lens side connection terminal, a sixth lens side connection terminal to which a second clock signal is input from the camera body, and a third data signal output to the camera body in synchronization with the second clock signal. A seventh lens side connection terminal; an eighth lens side connection terminal that outputs a first asynchronous signal that is not synchronized with the first clock signal and the second clock signal to the camera body; A ninth lens side connection terminal to which a second asynchronous signal that is not synchronized with the first clock signal and the second clock signal is input from the camera body, and a third asynchronous that is not synchronized with the first clock signal and the second clock signal. Based on the tenth lens side connection terminal that outputs a signal to the camera body, the first asynchronous signal that is output from the eighth lens side connection terminal, and the first clock signal that is input from the third lens side connection terminal. Receiving the first data signal from the camera body using the fourth lens side connection terminal and transmitting the second data signal to the camera body using the fifth lens side connection terminal. And the second asynchronous signal input from the ninth lens side connection terminal and the third asynchronous signal output from the tenth lens side connection terminal And an operating voltage for transmitting the third data signal to the camera body using the seventh lens-side connection terminal based on the second clock signal input at the sixth lens-side connection terminal. Is composed of an eleventh lens side connection terminal supplied from the camera body and a twelfth lens side connection terminal serving as a ground terminal corresponding to the operating voltage, and the contact portion of the first lens side connection terminal and the The inner angle formed by the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the contact portion of two terminals arbitrarily selected from the twelve lens side connection terminals and the lens side spare terminal. Is the largest inside angle formed with respect to the mount center point, and the contact portion of the eleventh lens side connection terminal and the contact portion of the twelfth lens side connection terminal are in the mount. The inner angle formed with respect to the point is determined by the mount center point between any one of the contact portions of the first lens side connection terminal to the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal. The inner angle formed by the contact portion of the third lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is smaller than the inner angle formed with respect to the first lens side connection. Any one of the contact portion of the terminal, the second lens side connection terminal, and the fourth lens side connection terminal to the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal are An inner angle formed by the contact portion of the fourth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is smaller than an inner angle formed with respect to the mount center point. Of the first lens side connection terminal, the second lens side connection terminal, and the fifth lens side connection terminal to the tenth lens side connection terminal, one of the contact portion and the eleventh lens side connection terminal. The contact portion is smaller than an inner angle formed with respect to the mount center point, and the contact portion of the fifth lens side connection terminal and the contact portion of the eleventh lens side connection terminal form with respect to the mount center point. The inner angle is any one of the first lens side connection terminal, the second lens side connection terminal, and the sixth lens side connection terminal to the tenth lens side connection terminal, and the eleventh lens side. The contact portion of the connection terminal is smaller than the inner angle formed with respect to the mount center point, and the contact portion of the eighth lens side connection terminal and the contact portion of the eleventh lens side connection terminal are The inner angle formed with respect to the und center point is the first lens side connection terminal, the second lens side connection terminal, the sixth lens side connection terminal, the seventh lens side connection terminal, the ninth lens side connection terminal, And any one of the contact portions of the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the ninth lens side connection terminal The inner angle formed by the contact portion of the eleventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the first lens side connection terminal, the second lens side connection terminal, or the sixth lens side. Any one of the contact portion of the connection terminal, the seventh lens side connection terminal, and the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal are in relation to the mount center point. The inner angle formed by the contact portion of the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is smaller than the inner angle formed by the first lens side connection terminal, Any one of the second lens side connection terminal, the sixth lens side connection terminal, and the seventh lens side connection terminal and the contact part of the eleventh lens side connection terminal are the mount center point. The inner angle formed by the contact portion of the sixth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is smaller than the inner angle formed with respect to the first lens side connection. Any one of the contact portion of the terminal, the second lens side connection terminal, and the seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal are opposed to the mount center point. The inner angle formed by the contact portion of the seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is smaller than the inner angle formed by the first lens side connection terminal and The contact portion of any one of the second lens side connection terminals and the contact portion of the eleventh lens side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the second lens side connection terminal The inner angle formed by the contact portion and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the contact between the contact portion of the first lens side connection terminal and the eleventh lens side connection terminal. Is smaller than the inner angle formed with respect to the mount center point, and the exposed region of the lens side spare terminal and the contact portion of the eleventh lens side connection terminal are formed with respect to the mount center point. An inner angle is smaller than an inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point.

Claims (7)

A camera body having twelve body side connection terminals provided in the vicinity of the body side mount portion of the camera body, and a lens side mount portion having a mount center point;
The twelve lens-side connection terminals connected to each of the twelve body-side connection terminals, each having a contact portion that contacts the body-side connection terminal, and at least one lens-side spare terminal having a contact portion A holding portion arranged in an arc shape with respect to the mount center point;
An optical system including a driven member that can be driven;
A drive unit for driving the driven member,
The twelve lens side connection terminals are:
A first lens side connection terminal to which a driving voltage for operating the driving unit is supplied from the camera body;
A second lens side connection terminal serving as a ground terminal corresponding to the drive voltage;
A third lens side connection terminal to which a first clock signal is input from the camera body;
A fourth lens side connection terminal to which a first data signal is input from the camera body in synchronization with the first clock signal;
A fifth lens side connection terminal that outputs a second data signal to the camera body in synchronization with the first clock signal;
A sixth lens side connection terminal to which a second clock signal is input from the camera body;
A seventh lens side connection terminal for outputting a third data signal to the camera body in synchronization with the second clock signal;
An eighth lens side connection terminal for outputting a first asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
A ninth lens side connection terminal to which a second asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the camera body;
A tenth lens side connection terminal for outputting a third asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
Based on the first asynchronous signal output from the eighth lens side connection terminal and the first clock signal input from the third lens side connection terminal, the camera body is used with the fourth lens side connection terminal. Receiving the first data signal and transmitting the second data signal to the camera body using the fifth lens side connection terminal, and the input to the ninth lens side connection terminal Based on the second asynchronous signal, the third asynchronous signal output from the tenth lens side connection terminal, and the second clock signal input from the sixth lens side connection terminal, the seventh lens side connection terminal is An operating voltage for transmitting the third data signal to the camera body using an eleventh lens side connection terminal supplied from the camera body;
A twelfth lens side connection terminal serving as a ground terminal corresponding to the operating voltage;
The inner angles formed by the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the 12 lens side connection terminals and the lens side spare terminal. The contact portion of two terminals arbitrarily selected from the largest inside angle formed with respect to the mount center point,
The inner angle formed by the contact portion of the eleventh lens side connection terminal and the contact portion of the twelfth lens side connection terminal with respect to the mount center point is the tenth lens side connection from the first lens side connection terminal. The contact portion of any one of the terminals and the contact portion of the eleventh lens side connection terminal is smaller than an inner angle formed with respect to the mount center point,
The inner angles formed by the contact portion of the third lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the first lens side connection terminal and the second lens side connection. An inner angle formed by the contact portion of any one of the terminal and the fourth lens side connection terminal to the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point Smaller,
The inner angles formed by the contact portion of the fourth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the first lens side connection terminal and the second lens side connection. An inner angle formed by the contact portion of any one of the terminal and the fifth lens side connection terminal to the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point Smaller,
The inner angles formed by the contact portion of the fifth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the first lens side connection terminal and the second lens side connection. An inner angle formed by the contact portion of any one of the terminal and the sixth lens side connection terminal to the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point Smaller,
The inner angles formed by the contact portion of the eighth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the first lens side connection terminal and the second lens side connection. Any one of the terminal, the sixth lens side connection terminal, the seventh lens side connection terminal, the ninth lens side connection terminal, and the tenth lens side connection terminal, and the eleventh lens side connection. The contact portion of the terminal is smaller than the inner angle formed with respect to the mount center point,
The inner angles formed by the contact portion of the ninth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the first lens side connection terminal and the second lens side connection. Any one of the contact portion of the terminal, the sixth lens side connection terminal, the seventh lens side connection terminal, and the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal Smaller than the inner angle formed with respect to the mount center point,
The internal angles formed by the contact portion of the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the first lens side connection terminal and the second lens side connection. An inner angle formed by the contact portion of any one of the terminal, the sixth lens side connection terminal, and the seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point Smaller,
The inner angles formed by the contact portion of the sixth lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point are the first lens side connection terminal and the second lens side connection. A contact angle between any one of the terminal and the seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal is smaller than an inner angle formed with respect to the mount center point;
The inner angle formed by the contact portion of the seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the first lens side connection terminal and the second lens side connection. The contact portion of any one of the terminals and the contact portion of the eleventh lens side connection terminal is smaller than an inner angle formed with respect to the mount center point,
The inner angle formed by the contact portion of the second lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the contact angle between the contact portion of the first lens side connection terminal and the first 11 is smaller than an inner angle formed by the contact portion of the lens side connection terminal with respect to the mount center point,
The inner angle formed by the contact portion of the lens side spare terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the contact angle of the first lens side connection terminal and the eleventh lens. An interchangeable lens, wherein the contact portion of the side connection terminal is smaller than an inner angle formed with respect to the mount center point. The interchangeable lens according to claim 1,
The interchangeable lens, wherein the lens side spare terminal is a terminal that is not connected to any of the 12 body side connection terminals. The interchangeable lens according to claim 1 or 2,
The interchangeable lens, wherein the lens side spare terminal is a maintenance terminal. The interchangeable lens according to claim 1 or 2,
The lens-side mount portion includes a first camera body and a second camera body having second body-side terminals different from the 12 body-side connection terminals in the vicinity of the body-side mount portion. Can be installed
The lens-side spare terminal is connected to the second body-side terminal when the second camera body is attached to the lens-side mount. The interchangeable lens according to claim 1 or 2,
It is possible to attach the camera body to the lens side mount part via an intermediate adapter having an adapter side terminal connected to the lens side spare terminal.
An interchangeable lens comprising adapter detecting means for detecting the presence or absence of the intermediate adapter using the lens side spare terminal. In the interchangeable lens according to any one of claims 1 to 5,
The interchangeable lens, wherein the lens side spare terminal has substantially the same shape as at least one of the 12 lens side connection terminals. In the interchangeable lens as described in any one of Claims 1-6,
The 12 lens side connection terminals and the at least one lens side spare terminal each have an exposed area exposed on the surface of the holding portion.

Images