JP2013080213A - Interchangeable lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interchangeable lens with the number of parts reduced.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 11 lens-side connection terminals arranged thereon to be connected with the respective body-side connection terminals except one of the 12 body-side connection terminals; a drive part to drive a driven member; and a communication part to perform data-communication with the camera body. One of the 12 body-side connection terminals not to be connected with the 11 lens-side connection terminals is a grounding terminal corresponding to either one of drive voltage or operation voltage that does not correspond to an eleventh lens-side terminal. And, both the drive part and the communication part use the eleventh lens-side terminal as a grounding terminal.

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). This terminal group is arranged side by side in an arc shape, and includes two sets of power supply terminals and ground terminals.

Japanese Patent Laid-Open No. 7-234432

  The interchangeable lens described in Patent Document 1 has a problem that the number of parts increases because there are two systems of ground terminals.

The interchangeable lens according to claim 1, wherein a camera body having twelve body side connection terminals provided in the vicinity of the body side mount portion of the camera body is attached, and each of the lens side mount portion having a mount center point, , A holding unit in which a plurality of lens side connection terminals having contact portions that come into contact with one body side connection terminal are arranged, an optical system including a driven member that can be driven, and a driving unit that drives the driven member And a control unit that performs data communication with the camera body, and the plurality of lens side connection terminals include a first lens side connection terminal that is supplied with a drive voltage for operating the drive unit from the camera body. A third lens side connection terminal to which a first clock signal is input from the camera body, and a first data signal from the camera body in synchronization with the first clock signal. A fourth lens side connection terminal, a fifth lens side connection terminal for outputting a second data signal to the camera body in synchronization with the first clock signal, and a second clock signal from the camera body. A sixth lens side connection terminal, a seventh lens side connection terminal for outputting a third data signal to the camera body in synchronization with the second clock signal, and the first clock signal and the second clock signal. An eighth lens side connection terminal that outputs a first asynchronous signal that is not synchronized to the camera body, and a ninth lens that is input from the camera body is a second asynchronous signal that is not synchronized with the first clock signal and the second clock signal. Side connection terminal and the 10th lens side which outputs the 3rd asynchronous signal which is not synchronized with the 1st clock signal and the 2nd 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 to the third lens side connection terminal by the connection terminal and the control unit, the fourth lens side The connection terminal is used to receive the first data signal from the camera body, the fifth lens side connection terminal is used to transmit the second data signal to the camera body, and the ninth Based on the second asynchronous signal input to the lens side connection terminal, the third asynchronous signal output from the tenth lens side connection terminal, and the second clock signal input to the sixth lens side connection terminal. , An eleventh lens-side connection terminal to which an operating voltage for transmitting the third data signal to the camera body using the seventh lens-side connection terminal is supplied from the camera body. 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 determined from the plurality of lens side connection terminals. The contact portion of the two lens-side connection terminals selected arbitrarily is the largest inside 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 terminal An inner angle formed by the contact portion with respect to the mount center point is any one of the contact portion of the first lens side connection terminal and the fourth lens side connection terminal to the tenth lens side connection terminal. 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 fourth lens side connection terminal and the contact portion of the eleventh lens side connection terminal are The inner angle formed with respect to the mount center point is any one of the first lens side connection terminal and the fifth lens side connection terminal to the tenth lens side connection terminal and the eleventh lens side connection. The contact portion of the terminal 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 are relative to the mount center point. The inner angle formed by the first lens side connection terminal and the sixth lens side connection terminal to the tenth lens side connection terminal and the contact part 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 eighth 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 any one of the first lens side connection 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. One contact portion and the contact portion of the eleventh lens side connection terminal are smaller than an inner angle formed with respect to the mount center point, and the contact portion of the ninth 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 sixth lens side connection terminal, the seventh lens side connection terminal, or the tenth 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 tenth lens side connection terminal and the first An inner angle formed by the contact portion of one lens side connection terminal with respect to the mount center point is any one of the first lens side connection terminal, the sixth lens side connection terminal, and the seventh lens side connection terminal. One contact portion and the contact portion of the eleventh lens side connection terminal are 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 connection terminal The inner angle formed by the contact portion with respect to the mount center point is the contact portion of either the first lens side connection terminal or the seventh lens side connection terminal 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 seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal are relative to the mount center point. The inner angle formed is smaller than 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, and the drive unit and the control unit are It has a common grounding part.
The interchangeable lens according to claim 4, wherein a camera body having twelve body side connection terminals provided in the vicinity of the body side mount portion of the camera body is attached, and each of the lens side mount portion having a mount center point, , A holding portion having 11 lens side connection terminals having a contact portion in contact with one body side connection terminal, an optical system including a driveable driven member, and a drive for driving the driven member And a communication unit that performs data communication with the camera body, and the eleven lens side connection terminals are connected to a first lens side to which a driving voltage for operating the driving unit is supplied from the camera body. A terminal, a third lens side connection terminal to which a first clock signal is input from the camera body, and a first data signal from the camera body in synchronization with the first clock signal. A fourth lens side connection terminal that is input, a fifth lens side connection terminal that outputs a second data signal to the camera body in synchronization with the first clock signal, and a second clock signal input from the camera body. A sixth lens side connection terminal, a seventh lens side connection terminal for outputting a third data signal to the camera body in synchronization with the second clock signal, the first clock signal and the second clock signal An eighth lens-side connection terminal that outputs a first asynchronous signal that is not synchronized to the camera body to the camera body, and a second asynchronous signal that is not synchronized with the first clock signal and the second clock signal is input from the camera body. A lens side connection terminal and a tenth lens that outputs a third asynchronous signal that is not synchronized with the first clock signal and the second clock signal to the camera body. The fourth lens based on the first asynchronous signal output from the eighth lens side connection terminal and the first clock signal input to the third lens side connection terminal. Receiving the first data signal from the camera body using a side connection terminal, transmitting the second data signal to the camera body using the fifth lens side connection terminal; and Based on the second asynchronous signal input to the 9th lens side connection terminal, the third asynchronous signal output from the 10th lens side connection terminal, and the second clock signal input to the 6th lens side connection terminal. Thus, an operating voltage for transmitting the third data signal to the camera body using the seventh lens side connection terminal is supplied from the camera body. A connecting terminal and a twelfth lens side connecting terminal serving as a ground terminal corresponding to the operating voltage, and the contact portion of the first lens side connecting terminal and the contact portion of the eleventh lens side connecting terminal are The inner angle formed with respect to the mount center point is the largest of the inner angles formed by the contact portions of the two lens side connection terminals arbitrarily selected from the eleven lens side connection terminals 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, and the contact portion of the third lens side connection terminal The inner angle formed by the contact portion of the eleventh lens side connection terminal with respect to the mount center point is any of the first lens side connection terminal and the fourth lens side connection terminal to the tenth 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 fourth lens side connection terminal and the eleventh lens side connection The inner angle formed by the contact portion of the terminal with respect to the mount center point is any one of the contact portion of the first lens side connection 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 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 and the eleventh lens side connection The inner angle formed by the contact portion of the child with respect to the mount center point is any one of the contact portions of the first lens side connection 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 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 first lens side connection terminal, the sixth lens side connection terminal, the seventh lens side connection terminal, the ninth lens side connection terminal, and the tenth lens side. The contact portion of any one of the 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 of the ninth lens side connection terminal is smaller. 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 sixth lens side connection terminal, or the seventh lens side connection terminal. And 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 tenth lens side connection The inner angles 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 are the first lens side connection terminal, the sixth lens side connection terminal, and the seventh The contact portion of any one of the 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 of the sixth lens side connection terminal is smaller. 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 portion of either the first lens side connection terminal or 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, and the contact portion of the seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal Is smaller than 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. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the seventh lens side connection terminal with respect to the mount center point is from the third lens side connection terminal to the twelfth lens side. Characterized in that the contact portions of any two lens-side connection terminal adjacent of connection terminals is approximately twice the interior angle formed with respect to the mount center point.
The interchangeable lens according to claim 6, wherein a camera body having twelve body side connection terminals provided in the vicinity of the body side mount portion of the camera body is attached, and each of the lens side mount portion having a mount center point, , A holding portion having 11 lens side connection terminals having a contact portion in contact with one body side connection terminal, an optical system including a driveable driven member, and a drive for driving the driven member And a communication unit that performs data communication with the camera body, and the eleven lens side connection terminals are connected to a first lens side 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 the first data signal is input from the camera body in synchronization with the clock signal, and a fifth data signal to be output to the camera body in synchronization with the first clock signal. A seventh lens that outputs a third data signal to the camera body in synchronization with the lens-side connection terminal, a sixth lens-side connection terminal that receives a second clock signal from the camera body, and the second clock signal. A 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, and the first clock signal and the second clock signal. A second asynchronous signal that is not synchronized is the same as the ninth lens-side connection terminal that receives an input from the camera body, the first clock signal, and the second clock signal. A tenth lens-side connection terminal that outputs a third asynchronous signal to the camera body, and the communication unit is connected to the first asynchronous signal and the third lens-side connection terminal that are output from the eighth lens-side connection terminal. Based on the input first clock signal, the fourth lens side connection terminal is used to receive the first data signal from the camera body, and the fifth lens side connection terminal is used to the camera body. The second data signal, and the second asynchronous signal input to the ninth lens side connection terminal, the third asynchronous signal output from the tenth lens side connection terminal, and the first Based on the second clock signal inputted to the 6 lens side connection terminal, the third data signal is transmitted to the camera body using the seventh lens side connection terminal. Operating voltage is composed of an eleventh lens side connection terminal supplied from the camera body, and the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal are the mount. The inner angle formed with respect to the center point is the largest of the inner angles formed by the contact portions of the two lens side connection terminals arbitrarily selected from the eleven lens side connection terminals with respect to the mount center point. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the second lens side connection terminal with respect to the mount center point is from the third lens side connection terminal to the eleventh lens side connection terminal. Any one of the contact portion and the contact portion of the first lens side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the contact portion of the first lens side connection terminal and the first The inner angle formed by the contact portion of the lens side connection terminal with respect to the mount center point is the connection from the third lens side connection terminal to the sixth lens side connection terminal and the eighth lens side connection terminal to the eleventh lens side connection. The contact portion of any one of the terminals and the contact portion of the first lens side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the contact portion of the first lens side connection terminal and the first The internal angle formed by the contact portion of the 6 lens side connection terminal with respect to the mount center point is the third lens side connection terminal to the 5th lens side connection terminal and the 8th lens side connection terminal to the 11th lens side. The contact portion of any one of the connection terminals and the contact portion of the first lens side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the first lens side connection terminal The inner angle formed by the contact portion and the contact portion of the tenth lens side connection terminal with respect to the mount center point is the third lens side connection terminal to the fifth lens side connection terminal and the eighth lens side connection. An inner angle formed by the contact portion of any one of the terminal, the ninth lens side connection terminal, and the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal with respect to the mount center point The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the ninth lens side connection terminal with respect to the mount center point is smaller than that of the third lens side connection terminal. The contact portion of any one of the lens side connection terminal, the eighth lens side connection terminal, and the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal are being mounted. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the eighth lens side connection terminal with respect to the mount center point is smaller than the inner angle formed with respect to the center point. Any one of the contact portion from the side connection terminal to the fifth lens side connection terminal and the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal form the mount center point. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the fifth lens side connection terminal with respect to the mount center point is smaller than the inner angle, and the third lens side connection terminal, The contact portion of any one of the four lens side connection terminals and the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal are smaller than the inner angle formed with respect to the mount center point. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the fourth lens side connection terminal with respect to the mount center point is the third lens side connection terminal and the eleventh lens side connection. The contact portion of any one of the terminals and the contact portion of the first lens side connection terminal are smaller than an inner angle formed with respect to the mount center point, and the contact portion of the first lens side connection terminal and the third The inner angle formed by the contact portion of the lens side connection terminal with respect to the mount center point is such that the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal are the mount center point. 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 contact point. Characterized in that the contact portions of any two lens-side connection terminal from the terminal neighboring of the tenth lens-side connection terminal is approximately twice the interior angle formed with respect to the mount center point.

  According to the present invention, the number of parts can be reduced.

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 a front view of the holding | maintenance part 202 in 2nd Embodiment. It is the front view and sectional drawing of the 8th lens side connection terminal LP8 in 2nd Embodiment. It is a front view of the holding | maintenance part 202 in 3rd Embodiment.

(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 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. Eleven lens-side connection terminals are held at a position in the vicinity of the lens-side mount unit 201 (inner peripheral side of the lens-side mount unit 201) while partially protruding toward the inner peripheral side of the lens-side mount unit 201. A holding part (electrical connection part) 202 is provided.

  When the interchangeable lens 200 is attached to the camera body 100, a plurality of body-side connection terminals provided in the holding portion 102 (detailed later) are replaced with a plurality of lenses provided in the holding portion 202 (detailed later). It is electrically and physically connected to the side connection 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.

  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 holding unit 102 has twelve body side connection terminals BP <b> 1 to BP <b> 12. The holding portion 202 has 11 lens sides LP1, LP3 to LP12 corresponding to 11 body side connection terminals BP1, BP3 to BP12, respectively, of the 12 body side connection terminals BP1 to BP12. A connection terminal exists.

  The camera body 100 includes a secondary battery 132 that can supply a voltage within a predetermined range. Each part in the camera body 100 (the body control unit 103, the body-side first communication unit 117, the body-side second communication unit 118, etc.) is operated by the voltage supplied by the secondary battery 132. In addition, each part in the camera body 100 may use the voltage stepped down by a known series regulator, a switching regulator, or the like instead of directly using the voltage supplied by the secondary battery 132.

  A positive electrode and a negative electrode of the secondary battery 132 are connected to a power supply circuit 130 provided in the camera body 100. The eleventh body side connection terminal BP11 and the twelfth body side connection terminal BP12 are connected to the power supply circuit 130. Based on the voltage supplied from the secondary battery 132, the power supply circuit 130 supplies the eleventh body side connection terminal BP11 with the operating voltage of each part in the interchangeable lens 200 excluding the lens driving part 212. 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.

  In FIG. 3, only the connection between the eleventh lens side connection terminal LP11 and the lens control unit 203 is shown, but the eleventh lens side connection terminal LP11 is actually connected to the lens side first communication unit 217 or the lens side first connection. 2 is also connected to the communication unit 218 and the like, and supplies an operating voltage to each of these units. The same applies to the twelfth lens side connection terminal LP12.

  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, and is connected to the negative electrode of the secondary battery 132 inside the power supply circuit 130. 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 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 is connected to the positive electrode of the secondary battery 132 via the switch 131. The second body side connection BP2 is connected to the negative electrode of the secondary battery 132. The secondary battery 132 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, and is connected to the negative electrode of the secondary battery 132. That is, the second body side connection terminal BP2 is a ground terminal corresponding to the drive voltage. The holding portion 202 of the interchangeable lens 200 is not provided with a terminal corresponding to the second body side connection terminal BP2. That is, when the camera body 100 and the interchangeable lens 200 are coupled, the second body side connection terminal BP2 is opened.

  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. That is, the first body side connection terminal BP1 and the second body side connection terminal BP2 constitute a power supply system terminal for supplying power from the camera body 100 side to the interchangeable lens 200 side.

  The first lens side connection terminal LP1 is connected to the lens driving unit 212 in the interchangeable lens 200. The lens driving unit 212 is further connected with a twelfth lens side connection terminal LP12. That is, the lens driving unit 212 operates with the driving voltage supplied from the first lens side connection terminal LP1 with the twelfth lens side connection terminal LP12 as the ground. In other words, the circuit such as the lens control unit 203 in the interchangeable lens 200 and the driving system such as the lens driving unit 212 share the ground.

  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 mount surface of the body side mount unit 101 and the mount surface of the lens side mount unit 201 are brought into contact with each other and the camera body 100 and the interchangeable lens 200 are coupled, the holding unit 102 and the holding unit 202 are connected, and both holding units are connected. 11 body side connection terminals BP1, BP3 to BP12 and 11 lens side connection terminals LP1, LP3 to LP12 are connected to each other. Further, as described above, the second body side connection terminal BP2 is not connected to any lens side connection terminal. 4 and 5, the alternate long and short dash lines drawn on the twelve body side connection terminals BP1 to BP12 and the eleven lens side connection terminals LP1 and LP3 to LP12 represent the camera body 100 and the interchangeable lens 200. The locus | trajectory of 12 body side connection terminals BP1-BP12 at the time of coupling | bonding is represented. 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 eleven lens side connection terminals LP1, LP3 to LP12 has a shape in which a substantially rectangular conductor is exposed on the surface of the holding portion 202. 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 so as to overlap the eleven lens side connection terminals LP1, LP3 to LP12 are circles indicating the pressing positions of the corresponding body side connection terminals. .

  In the following description, for each of the eleven lens-side connection terminals LP1, LP3 to LP12, a region that contacts the body-side connection terminal when the camera body 100 and the interchangeable lens 200 are coupled among the entire lens-side connection terminals (FIG. 5). A region indicated by a circle in (a) 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. In this embodiment, the lens-side connection terminal is not only a substantially rectangular area (including a contact part) exposed on the surface of the holding part 202 shown by hatching in FIG. And a lens-side first communication unit 217 and a lens-side second communication unit 218 are names including electrical wiring (such as lead wires and flexible cables). In addition, the region exposed on the surface of the holding portion 202 indicated by hatching as described above may be hereinafter referred to as the exposed region of the lens side connection terminals LP1, LP3 to LP12. The exposed area will be described later in detail with reference to FIG.

  As shown in FIG. 5A, eleven lens-side connection terminals LP <b> 1 and LP <b> 3 to LP <b> 12 (exposed areas thereof) are arranged along the lens-side mount unit 201 in the holding unit 202 of the lens-side mount unit 201. Arranged in a circular arc shape (circular arc shape) with the mount center point O as the center (in the circular arc direction along a part of the lens-side mount portion 201 having an approximately circular outer shape). In the present embodiment, among these eleven lens side connection terminals LP1, LP3 to LP12, the lens side connection terminals LP3 to LP12 (exposed areas thereof) are arranged so that the contact portions are equally spaced, and an arc (mount) The angle θ11 between the center point O and the center (of the exposed area) of the first lens side connection terminal LP1 and the center (of the exposed area) of the eleventh lens side connection terminal LP11 is about 105 degrees. The arc angle θ0 between the contact portions is about 9.5 degrees, respectively. In the present embodiment, the eleven lens-side connection terminals LP1, LP3 to LP12 each have a width in the arc direction of about 1.5 mm. Since the distance from the mount center point O to the center of the contact portion of each lens side connection terminal LP1, LP3 to LP12 is about 15 mm, the distance in the arc direction between the centers of the lens side connection terminals LP3 to LP12 is about 2. .5mm. Since the width in the arc direction of each of the lens side connection terminals LP3 to LP12 is about 1 mm, the clearance in the arc direction between the lens side connection terminals LP3 to LP12 is about 1 mm.

  It should be noted that the width (clearance) and clearance of the lens side connection terminals LP1 to LP12 can be changed as appropriate. For example, the width of each lens-side connection terminal LP1 to LP12 in the arc direction (of the exposed area) may be increased or decreased in units of 1/10 mm (in the unit of several millimeters of commas), and the clearance in the arc direction accordingly. The width can also be changed as appropriate in units of 1/10 mm (comma units of millimeters, for example, plus or minus 0.2 mm).

  Hereinafter, the positional relationship between the eleven lens-side connection terminals LP1, LP3 to LP12 (exposed regions) 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 determined from the eleven lens side connection terminals LP1, LP3 to LP12. The contact portion between the two selected lens side connection terminals is the largest internal 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 fourth lens side connection terminal LP4. The contact portion of any one of the tenth lens side connection terminals LP10 to the contact portion of the eleventh lens side connection terminal LP11 is smaller than the inner angles θ3 to θ11 formed with respect to the mount center point O.

  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 fifth lens side connection terminal LP5. From the tenth lens side connection terminal LP10, the contact portion of any one lens side connection terminal and the contact portion of the eleventh lens side connection terminal LP11 are smaller than the inner angles θ4 to θ11 formed with respect to the mount center point O. 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 sixth lens side connection terminal LP6. From the tenth lens side connection terminal LP10, 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 θ5 to θ11 formed with respect to the mount center point O.

  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 sixth lens side connection terminal LP6. , The contact portion of any one of the seventh lens side connection terminal LP7, the ninth lens side connection terminal, and the tenth lens side connection terminal LP10 and the contact portion of the eleventh lens side connection terminal LP11. The internal angles formed with respect to the mount center point O are smaller than θ6 to θ11. 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 sixth lens side connection terminal LP6. , The inner angle θ7 to θ11 formed by the contact portion of the lens side connection terminal of any one of the seventh lens side connection terminal LP7 and the tenth lens side connection terminal LP10 and the eleventh lens side connection terminal LP11 with respect to the mount center point O. Smaller than.

  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 sixth lens side connection terminal LP6. And 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 are smaller than the inner angles θ8 to θ11 formed with respect to the mount center point O. 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 seventh lens side connection terminal. The contact portion of any one lens side connection terminal of LP7 and the contact portion of the eleventh lens side connection terminal LP11 are smaller than 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 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 inner angle formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the seventh lens side connection terminal LP7 with respect to the mount center point O is from the third lens side connection terminal LP3 to the twelfth lens side connection terminal LP12. The contact portion of any two adjacent lens side connection terminals is approximately twice the inner angle formed with respect to the mount center point O. Here, the two adjacent lens side connection terminals are, for example, the eleventh lens side connection terminal LP11 and the twelfth lens side connection terminal LP12, the fifth lens side connection terminal LP5 and the eighth lens in FIG. 5A. 11 side connection terminals LP8, 10th lens side connection terminal LP10, and 6th lens side connection terminal LP6 are adjacent to each other with 11 lens side connection terminals arranged on the circumference with respect to the mount center point O. One lens side connection terminal. The camera body 100 and the interchangeable lens 200 are connected between the first lens side connection terminal LP1 and the seventh lens side connection terminal LP7 (the eleventh body side connection terminal is connected to the eleventh lens side connection terminal LP11). When the voltage is supplied from LP11), the second body side connection terminal exists.

  The eleven lens-side connection terminals LP1, LP3 to LP12 (exposed areas thereof) are arranged in the holding portion 202 in the positional relationship as described above. Note that the third lens side connection terminal LP3 to the tenth lens side connection terminal LP10 which are communication system terminals (communication system terminals) and an eleventh power supply voltage (the operation voltage described above) among the power supply system terminals. The twelfth lens side connection terminal LP12, which is the ground terminal (ground terminal), is disposed between the lens side connection terminal LP11 and the power supply system terminal (signal line) as a communication system terminal (signal line). This is to minimize the influence on the signal line.

  A signal line for supplying a power supply voltage (a signal line including the eleventh lens side connection terminal LP11) undergoes a large voltage change in accordance with 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, the ground terminal (the twelfth lens side connection terminal LP12) whose voltage change is more stable than the power supply terminal (the eleventh lens side connection terminal LP11) is connected to the communication system terminal ( The third lens side connection terminal LP3 to the tenth lens side connection terminal LP10) are interposed between the power supply terminal (the 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.

  Note that the twelve body side connection terminals BP1 to BP12 arranged in the holding portion 102 on the camera body 100 side shown in FIG. 4 are the 11 lens side connection terminals LP1 and LP3 to LP12 on the interchangeable lens 200 side described above. Since it is the same as that, the description is omitted. 1, 4, and 5, 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. Yes. Therefore, as shown in FIGS. 4A and 5A, the arrangement direction of the body side connection terminals BP1 to BP12 is opposite to the arrangement direction of the lens side connection terminals LP1 and LP3 to LP12. (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 at the right end. The first body side connection terminal BP1 is arranged at the left end).

(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 lens side connection terminal LP9 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.

According to the camera system according to the first embodiment described above, the following operational effects can be obtained.
(1) 11 lens-side connection terminals LP1 connected to each of the 12 body-side connection terminals BP1 to BP12 provided in the vicinity of the body-side mount portion 101 except for the second body-side connection terminal BP2, LP3 to LP12 (exposed areas thereof) are arranged in the holding unit 202. The second body side connection terminal BP2 that is not connected to any lens side connection terminal is a ground terminal corresponding to the first body side connection terminal BP1 to which a drive voltage for operating the lens driving unit 212 is supplied. The lens driving unit 212, the lens side first communication unit 217, and the lens side second communication unit 218 all use the twelfth lens side connection terminal LP12 as a ground terminal. Since it did in this way, it becomes unnecessary to wire the terminal for connecting with 2nd body side connection terminal BP2 in the interchangeable lens 200, and can reduce a number of parts.

(2) There is no terminal at the position of the holding portion 202 corresponding to the second body side connection terminal BP2. Since it did in this way, the member for providing the terminal for connecting with 2nd body side connection terminal BP2 becomes unnecessary, and can reduce a number of parts.

(Second Embodiment)
The camera system of the second embodiment to which the present invention is applied has the same configuration as the camera system of the first embodiment, but the surface of the exposed region of the lens side connection terminal is different from the first embodiment. The shape is different. Hereinafter, the surface shape of the exposed area of the lens side connection terminal in the second 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 is the same as that in the first embodiment.

  FIG. 8 is a front view of the holding unit 202 according to the second embodiment. As shown in FIGS. 8A and 8B, in the present embodiment, the eleven lens-side connection terminals LP1 to LP12 arranged in the holding portion 202 of the lens-side mount portion 201 are connected to the holding portion 202. It has a size that covers from the inner circumference side (side near the mount center point O) to the outer circumference side (side far from the mount center point O). 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. 9A is an enlarged front view of the eighth lens side connection terminal LP8, and FIG. 9B 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. 9B, 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. When viewed from the surface as shown in FIG. 9A, the exposed area looks as if larger than that in FIG. 5, but the size of the exposed area LP8a does not actually change.

  The exposure area of the eighth lens side connection terminal LP8 in the present embodiment has been described above, but the other ten lens side connection terminals are the same as the eighth lens side connection terminal LP8, and thus the description thereof is omitted. That is, the structure of the other ten lens side connection terminals is the same as that shown in FIG. 5, and the area that appears to increase on the surface is a fixing portion for fixing the metal piece to the holding portion 202. It is. Although the size and position of the exposed area are the same as those in the first embodiment shown in FIGS. 5A and 5B, the size and position of the exposed area are not necessarily the same. Good.

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

(Third embodiment)
The camera system of the third embodiment to which the present invention is applied has the same configuration as the camera system of the first embodiment, but the arrangement of the lens side connection terminals is different from that of the first embodiment. Hereinafter, the terminal arrangement of the lens side connection terminals in the third 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 is the same as that in the first embodiment.

  FIG. 10 is a front view of the holding unit 202 in the camera system according to the third embodiment. As shown in FIGS. 10A and 10B, the holding portion 202 of the present embodiment has 11 lens side connection terminals LP1 connected to each of the 11 body side connection terminals BP1 to BP11. ~ LP11 are arranged. In the first embodiment, the second body side connection terminal BP2 is configured not to be connected to any lens side connection terminal. In the present embodiment, the second body side connection terminal BP2 is connected to the second body side connection terminal BP2. A two-lens side connection terminal LP2 is prepared. On the other hand, the twelfth body side connection terminal BP12 is not connected to any lens side connection terminal. That is, the twelfth lens side connection terminal LP12 is removed from the holding portion 202.

  The internal wiring of the interchangeable lens 200 is the same as that obtained by replacing the twelfth lens side connection terminal LP12 in the first embodiment shown in FIG. 3 with the second lens side connection terminal LP2. That is, the lens driving unit 212 operates with the driving voltage supplied from the first lens side connection terminal LP1 with the second lens side connection terminal LP2 as the ground. In other words, the circuit such as the lens control unit 203 in the interchangeable lens 200 and the driving system such as the lens driving unit 212 share the ground.

  Hereinafter, the positional relationship between the eleven lens-side connection terminals LP1 to LP11 (exposed areas thereof) will be described with reference to FIG. An inner angle θ31 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 eleven lens side connection terminals LP1 to LP11. 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 θ0 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the second lens side connection terminal LP2 with respect to the mount center point O is from the third lens side connection terminal LP3 to the eleventh lens side connection terminal LP11. Is smaller than the inner angles θ22 to θ31 formed with respect to the mount center point O by any one of the contact portions and the contact portion of the first lens side connection terminal LP1. The internal angle θ22 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the seventh lens side connection terminal LP7 with respect to the mount center point O is from the third lens side connection terminal LP3 to the sixth lens side connection terminal LP6. From the inner angles θ23 to θ31 formed by the contact portion of any one of the eighth lens side connection terminal LP8 to the eleventh lens side connection terminal LP11 and the contact portion of the first lens side connection terminal LP1 with respect to the mount center point O. small.

  The internal angle θ23 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the sixth lens side connection terminal LP6 with respect to the mount center point O is from the third lens side connection terminal LP3 to the fifth lens side connection terminal LP5. From the inner angles θ24 to θ31 formed by the contact portion of any one of the eighth lens side connection terminal LP8 to the eleventh lens side connection terminal LP11 and the contact portion of the first lens side connection terminal LP1 with respect to the mount center point O. small. The internal angle θ24 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the tenth lens side connection terminal LP10 with respect to the mount center point O is from the third lens side connection terminal LP3 to the fifth lens side connection terminal LP5. And the eighth lens side connection terminal LP8, the ninth lens side connection terminal LP9, and the eleventh lens side connection terminal LP11 and the contact portion of the first lens side connection terminal LP1 is the mount center point O. Is smaller than the internal angle θ25 to θ31.

  The internal angle θ25 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the ninth lens side connection terminal LP9 with respect to the mount center point O is from the third lens side connection terminal LP3 to the fifth lens side connection terminal LP5. And an inner angle θ26 to θ31 formed by the contact portion of any one of the eighth lens side connection terminal LP8 and the eleventh lens side connection terminal LP11 and the contact portion of the first lens side connection terminal LP1 with respect to the mount center point O. small. The internal angle θ26 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the eighth lens side connection terminal LP8 with respect to the mount center point O is from the third lens side connection terminal LP3 to the fifth lens side connection terminal LP5. Further, any one contact portion of the eleventh lens side connection terminals LP11 and the contact portion of the first lens side connection terminals LP1 are smaller than the inner angles θ27 to θ31 formed with respect to the mount center point O. The internal angle θ27 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the fifth lens side connection terminal LP5 with respect to the mount center point O is the third lens side connection terminal LP3 and the fourth lens side connection terminal LP4. And the contact portion of any one of the eleventh lens side connection terminals LP11 and the contact portion of the first lens side connection terminal LP1 is smaller than the inner angles θ28 to θ31 formed with respect to the mount center point O.

  The internal angle θ28 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the fourth lens side connection terminal LP4 with respect to the mount center point O is the third lens side connection terminal LP3 and the eleventh lens side connection terminal LP11. Is smaller than the inner angles θ29 and θ31 formed by the contact portion of the first lens side connection terminal LP1 with respect to the mount center point O. The internal angle θ29 formed by the contact portion of the first lens side connection terminal LP1 and the contact portion of the third lens side connection terminal LP3 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 inner angle θ31 formed with respect to the mount center point O. The inner angle 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 from the first lens side connection terminal LP1 to the tenth lens side connection terminal LP10. The contact portion of any two adjacent lens side connection terminals is approximately twice the inner angle formed with respect to the mount center point O. The eleven lens side connection terminals LP1 to LP11 (exposed areas thereof) are arranged in the holding portion 202 in the positional relationship as described above.

  According to the camera system of the third 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)
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 2)
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 3)
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 4)
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 5)
In the above embodiment, the second body side connection terminal BP2 that is the ground terminal corresponding to the first body side connection terminal BP1 connected to the positive electrode of the secondary battery 132 is replaced so as not to be connected to any lens side connection terminal. The lens 200 was configured. Further, the lens control unit 203, the lens side first communication unit 217, the lens side second communication unit 218, and the lens driving unit 212 have the twelfth lens side connection terminal LP12 as a ground terminal. Conversely, the interchangeable lens 200 may be configured such that the second body side connection terminal BP2 is used as a ground terminal and the twelfth body side connection terminal BP12 is not connected to any lens side connection terminal. In this case, the lens control unit 203, the lens side first communication unit 217, the lens side second communication unit 218, and the lens driving unit 212 use the lens side connection terminal connected to the second body side connection terminal BP2 as a ground terminal. Will be used. Further, the lens side connection terminal is not disposed at a position corresponding to the twelfth body side connection terminal BP12 of the holding portion 202, and a lens side connection terminal is newly disposed at a position corresponding to the second body side connection terminal BP2. It will be.

(Modification 6)
In the embodiment described above, no terminal is provided at a position corresponding to the second body side connection terminal BP2 of the holding portion 202. This is provided with a terminal in the holding unit 202, and inside the interchangeable lens 200, the terminal and various circuits (the lens control unit 203, the lens side first communication unit 217, the lens side second communication unit 218, and the lens driving unit). 212) may not be connected. In other words, the external appearance of the holding unit 202 seems to have a terminal, but it is not actually connected to each circuit as a ground terminal, and only the member on the holding unit 202 may exist. In this case, since the lens side connection terminals can be uniformly arranged on the holding part 202, the camera body 100 can be smoothly attached to the interchangeable lens 200. Even in the case where the interchangeable lens 200 is configured in this way, the wiring in the interchangeable lens 200 can be omitted, and the number of parts can be reduced.

  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 ... Camera body, 101 ... Body side mount part, 102, 202 ... Holding part, 103 ... Body control part, 117 ... Body side 1st communication part, 118 ... Body side 2nd communication part, 200 ... Exchange Lens 201: Lens side mount part 203 ... Lens control part 210 ... Imaging optical system 217 ... Lens side first communication part 218 ... Lens side second communication part

In the interchangeable lens according to claim 1, a camera body having twelve body side connection terminals including two ground terminals provided in an arc shape near the body side mount portion of the camera body is mounted. A lens-side mount part, a holding part in which a plurality of lens-side connection terminals each having a contact part that comes into contact with a corresponding one of the body-side connection terminals when coupled to the camera body, and a drivable part An optical system including a driven member; a driving unit that drives the driven member; and a control unit that performs data communication with the camera body, wherein the plurality of lens side connection terminals are connected to the driving unit from the camera body. A first lens side connection terminal to which a drive voltage for operating the first lens is supplied, a third lens side connection terminal to which a first clock signal is input from the camera body, and the first A fourth lens side connection terminal to which the first data signal is input from the camera body in synchronization with the lock signal, and a fifth data signal that outputs the second data signal to the camera body in synchronization with the first clock signal. A seventh lens that outputs a third data signal to the camera body in synchronization with the lens-side connection terminal, a sixth lens-side connection terminal that receives a second clock signal from the camera body, and the second clock signal. A 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, and the first clock signal and the second clock signal. The second asynchronous signal that is not synchronized is synchronized with the ninth lens side connection terminal that is input from the camera body, the first clock signal, and the second clock signal. A tenth lens side connection terminal that outputs a third asynchronous signal that is not present to the camera body, and the control unit inputs the first asynchronous signal and the third lens side connection terminal that are output from the eighth lens side connection terminal. The first data signal is received from the camera body using the fourth lens side connection terminal based on the first clock signal and the camera body is received using the fifth lens side connection terminal. The second data signal is transmitted, and the second asynchronous signal input to the ninth lens side connection terminal, the third asynchronous signal output from the tenth lens side connection terminal, and the sixth Based on the second clock signal input to the lens side connection terminal, the third data signal is transmitted to the camera body using the seventh lens side connection terminal. An operating voltage has an eleventh lens side connection terminal supplied from the camera body, and the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal are the center of the mount. The interior angle formed with respect to the point is the largest of the interior angles formed by the contact portions of the two lens side connection terminals arbitrarily selected from the plurality of lens side connection terminals with respect to the mount center point. An inner angle formed by the contact portion of the lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is determined from the first lens side connection terminal and the fourth lens side connection terminal. 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 fourth lens side contact The inner 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 determined by the tenth lens from the first lens side connection terminal and the fifth lens side connection terminal. Any one of the contact portions of the 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 contact portion of the fifth lens side connection terminal The internal angle formed by the contact portion of the eleventh lens side connection terminal with respect to the mount center point is any of the first lens side connection terminal and the sixth lens side connection terminal to the tenth 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 eighth lens side connection terminal and the front The internal angle formed by 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 sixth lens side connection terminal, the seventh lens side connection terminal, or the ninth. The contact portion of any one of the lens side connection terminal and 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 first The inner angle formed by the contact portion of the 9th lens side connection terminal and the contact portion of the 11th lens side connection terminal with respect to the mount center point is the first lens side connection terminal, the sixth lens side connection terminal, Any one of the contact portion of 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 formed with respect 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 an angle, and the first lens side connection terminal, the first The contact portion of any one of the 6 lens side connection terminal and the seventh lens side connection terminal and the contact portion of the eleventh lens side connection terminal are smaller than an inner angle formed with respect to the mount center point, 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 seventh 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 seventh 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 such that the contact portion of the first lens side connection terminal and the contact portion of the eleventh lens side connection terminal are the mount center. The driving unit and the control unit have a common grounding unit that is in contact with one of the two grounding terminals included in the body-side connection terminal when coupled with the camera body. It is characterized by having.
The interchangeable lens according to claim 4, 12 of the camera body having a body-side connecting terminal comprising two ground terminals arranged in a circular arc shape in the vicinity of the body side mount portion of the camera body is mounted, the mount center point A lens-side mount portion having a contact portion, and a holding portion in which 11 lens-side connection terminals each having a contact portion that comes into contact with a corresponding one of the body-side connection terminals when coupled to the camera body are drivable An optical system including a driven member, a driving unit that drives the driven member, and a communication unit that performs data communication with the camera body, and the eleven lens-side connection terminals are connected to the camera body from the camera body. A first lens side connection terminal to which a drive voltage for operating the drive unit is supplied; 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 one clock signal, and a second data signal to be output to the camera body in synchronization with the first clock signal. A fifth lens side connection terminal, a sixth lens side connection terminal to which a second clock signal is input from the camera body, and a seventh data signal output to the camera body in synchronization with the second clock signal. A 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; the first clock signal and the second clock signal; A second asynchronous signal that is not synchronized with the ninth lens side connection terminal that is input from the camera body, the first clock signal, and the second clock signal. A tenth lens side connection terminal that outputs an unexpected third asynchronous signal to the camera body, and the communication unit outputs the first asynchronous signal and the third lens side connection terminal that are output from the eighth lens side connection terminal. Based on the input first clock signal, the fourth lens side connection terminal is used to receive the first data signal from the camera body, and the fifth lens side connection terminal is used to the camera body. The second data signal, and the second asynchronous signal input to the ninth lens side connection terminal, the third asynchronous signal output from the tenth lens side connection terminal, and the first Based on the second clock signal inputted to the 6 lens side connection terminal, the third data signal is transmitted to the camera body using the seventh lens side connection terminal. Operating voltage is composed of an eleventh lens-side connecting terminal supplied from the camera body and a twelfth lens-side connecting terminal serving as a ground terminal corresponding to the operating voltage. An 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 of two lens side connection terminals arbitrarily selected from the eleven lens side connection terminals. The contact portion of the eleventh lens side connection terminal and the contact portion of the twelfth lens side connection terminal form the mount center point. The inner angle is such that any one of the contact portion 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 are opposed to the mount center point. 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 by the first lens side connection terminal and The contact portion of any one of the fourth lens side connection terminal to 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, 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 fifth lens side connection. The contact portion of any one of the tenth lens side connection terminals from the 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 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 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 inner angles 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 are the first lens side connection terminal, the sixth lens side connection terminal, and the seventh lens. One of the contact portion of the side connection terminal, the ninth lens side connection terminal, and the tenth lens side connection terminal and the contact portion of the eleventh lens side connection terminal are the center of the mount. 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 smaller than an inner angle formed with respect to the point. Any one of the contact portion of the 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 provided. An 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 an inner angle formed with respect to the mount center point. One of the contact portion of the first lens side connection 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 are the mount. 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 center point. The contact portion of either the side connection terminal or the seventh 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 seventh lens side The inner angle formed by the contact portion of the connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the contact portion of the first lens side connection terminal and the eleventh lens side connection terminal. And the contact portion of the first lens side connection terminal and the contact portion of the seventh lens side connection terminal are opposite to the mount center point. The inner angle formed by the contact portion of any two adjacent lens side connection terminals from the third lens side connection terminal to the twelfth lens side connection terminal is substantially twice the inner angle formed by the mount center point. It is characterized by being.
In the interchangeable lens according to claim 6, a camera body having twelve body side connection terminals including two ground terminals provided in an arc shape in the vicinity of the body side mount portion of the camera body is mounted. A lens-side mount portion having a contact portion, and a holding portion in which 11 lens-side connection terminals each having a contact portion that comes into contact with a corresponding one of the body-side connection terminals when coupled to the camera body are drivable An optical system including a driven member, a driving unit that drives the driven member, and a communication unit that performs data communication with the camera body, and the eleven lens-side connection terminals are connected to the camera body from the camera body. A first lens side connection terminal to which a drive voltage for operating the drive unit is supplied; a second lens side connection terminal serving as a ground terminal corresponding to the drive voltage; and the camera body. The third lens side connection terminal to which the first clock signal is input, the fourth lens side connection terminal to which the first data signal is input from the camera body in synchronization with the first clock signal, and the first In synchronization with a clock signal, a fifth lens side connection terminal that outputs a second data signal to the camera body, a sixth lens side connection terminal that receives a second clock signal from the camera body, and the second clock A seventh lens side connection terminal that outputs a third data signal to the camera body in synchronization with the signal, and a first asynchronous signal that is not synchronized with the first clock signal and the second clock signal are output to the camera body. An eighth lens side connection terminal and a ninth lens side 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 that outputs a third asynchronous signal that is not synchronized with the first clock signal and the second clock signal to the camera body, and the communication unit is connected to the eighth lens side connection terminal. Based on the first asynchronous signal to be output and the first clock signal input to the third lens side connection terminal, the first data signal from the camera body using the fourth lens side connection terminal. Reception and transmission of the second data signal to the camera body using the fifth lens-side connection terminal, and input to the ninth lens-side connection terminal and the second asynchronous signal, the tenth Based on the third asynchronous signal output from the lens side connection terminal and the second clock signal input to the sixth lens side connection terminal, the seventh lens side connection end An operating voltage for transmitting the third data signal to the camera body using a child consists of an eleventh lens side connection terminal supplied from the camera body, and the operation voltage of the first lens side connection terminal An 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 of two lens side connection terminals arbitrarily selected from the eleven lens side connection terminals. The contact portion of the first lens side connection terminal and the contact portion of the second lens side connection terminal are formed with respect to the mount center point. The inner angle is that the contact portion of any one of the third lens side connection terminal to the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal are formed with respect to the mount center point. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the seventh lens side connection terminal with respect to the mount center point is smaller than the inner angle from the third lens side connection terminal to the sixth angle. Any one of the lens-side connection terminal and the eighth lens-side connection terminal to the eleventh lens-side connection terminal and the contact part of the first lens-side connection terminal are in relation to the mount center point. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the sixth lens side connection terminal with respect to the mount center point is smaller than the inner angle formed by the third lens side connection terminal. The contact portion of any one of the fifth lens side connection terminal and the eighth lens side connection terminal to the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal are the mounts. The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the tenth lens side connection terminal with respect to the mount center point is smaller than the inner angle formed with respect to the center point. Any one of the contact portion and the first lens from the side connection terminal to the fifth lens side connection terminal, the eighth lens side connection terminal, the ninth lens side connection terminal, and the eleventh lens side connection terminal. The contact portion of the side connection terminal is smaller than an inner angle formed with respect to the mount center point, and the contact portion of the first lens side connection terminal and the contact portion of the ninth lens side connection terminal are the mount center point. The internal angle formed with respect to is any one of the third lens side connection terminal, the fifth lens side connection terminal, the eighth lens side connection terminal, and the eleventh lens side connection terminal. The contact portion and the contact portion of the first lens side connection terminal are smaller than the inner angle formed with respect to the mount center point, and the contact portion of the first lens side connection terminal and the contact point of the eighth lens side connection terminal. An inner angle formed by the portion with respect to the mount center point is any one of the contact portion and the first lens from the third lens side connection terminal to the fifth lens side connection terminal and the eleventh lens side connection terminal. The contact portion of the lens side connection terminal is smaller than the inner angle formed with respect to the mount center point, and the contact portion of the first lens side connection terminal and the contact portion of the fifth lens side connection terminal are the mount center. The internal angle formed with respect to the point is any one of the contact portion and the first lens side connection end of the third lens side connection terminal, the fourth lens side connection terminal, and the eleventh lens side connection terminal. And the contact portion of the first lens side connection terminal and the contact portion of the fourth lens side connection terminal with respect to the mount center point. The inner angle formed by the contact portion of either the third lens side connection terminal or the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal with respect to the mount center point The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the third lens side connection terminal with respect to the mount center point is smaller than the contact portion of the first 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 contact portion of the third lens side connection terminal and the contact point of the eleventh lens side connection terminal The inner angle formed with respect to the mount center point is such that the contact portion of any two adjacent lens side connection terminals from the first lens side connection terminal to the tenth lens side connection terminal is at the mount center point. It is characterized by being approximately twice the inner angle formed.

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;
A holding portion in which a plurality of lens-side connection terminals each having a contact portion that contacts one body-side connection terminal is disposed;
An optical system including a driven member that can be driven;
A drive unit for driving the driven member;
A controller that performs data communication with the camera body;
The plurality of 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 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;
The control unit uses the fourth lens side connection terminal based on the first asynchronous signal output from the eighth lens side connection terminal and the first clock signal input to the third lens side connection terminal. Receiving the first data signal from the camera body and transmitting the second data signal to the camera body using the fifth lens side connection terminal, and the ninth lens side connection terminal On the basis of the second asynchronous signal input to the third lens, the third asynchronous signal output from the tenth lens side connection terminal, and the second clock signal input to the sixth lens side connection terminal. An operating voltage for transmitting the third data signal to the camera body using the lens side connection terminal has an eleventh lens side connection terminal supplied from the camera body.
An internal 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 arbitrarily selected from the plurality of lens side connection terminals 2 The largest contact angle between the contact points of the two lens side connection terminals 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 fourth lens side connection. The contact portion of any one of the tenth lens side connection terminals from the 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 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 fifth lens side connection. The contact portion of any one of the tenth lens side connection terminals from the 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 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 sixth lens side connection. The contact portion of any one of the tenth lens side connection terminals from the 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 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 sixth lens side connection. Any one of the contact portion among the terminal, the seventh lens side connection terminal, the ninth 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 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 sixth lens side connection. An inner angle formed by the contact portion of any one of the 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 with respect to the mount center point Smaller,
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 sixth 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 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 seventh 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 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 contact angle between the contact portion of the first lens side connection terminal and the 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 interchangeable lens, wherein the driving unit and the control unit have a common grounding unit. The interchangeable lens according to claim 1,
The interchangeable lens, wherein the shared ground portion shares a ground voltage wiring. The interchangeable lens according to claim 1,
The shared grounding part shares a terminal other than the contact part. 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;
A holding portion in which eleven lens-side connection terminals each having a contact portion that contacts one body-side connection terminal are disposed;
An optical system including a driven member that can be driven;
A drive unit for driving the driven member;
A communication unit that performs data communication with the camera body;
The eleven 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 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;
The communication unit uses the fourth lens side connection terminal based on the first asynchronous signal output from the eighth lens side connection terminal and the first clock signal input to the third lens side connection terminal. Receiving the first data signal from the camera body and transmitting the second data signal to the camera body using the fifth lens side connection terminal, and the ninth lens side connection terminal On the basis of the second asynchronous signal input to the third lens, the third asynchronous signal output from the tenth lens side connection terminal, and the second clock signal input to the sixth lens side connection terminal. An operating voltage for transmitting the third data signal to the camera body using a lens side connection terminal; 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 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 arbitrarily selected from the 11 lens side connection terminals The contact portion of the two lens side connection terminals is the largest of the inner angles 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 fourth lens side connection. The contact portion of any one of the tenth lens side connection terminals from the 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 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 fifth lens side connection. The contact portion of any one of the tenth lens side connection terminals from the 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 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 sixth lens side connection. The contact portion of any one of the tenth lens side connection terminals from the 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 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 sixth lens side connection. Any one of the contact portion among the terminal, the seventh lens side connection terminal, the ninth 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 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 sixth lens side connection. An inner angle formed by the contact portion of any one of the 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 with respect to the mount center point Smaller,
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 sixth 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 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 seventh 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 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 contact angle between the contact portion of the first lens side connection terminal and the 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 first lens side connection terminal and the contact portion of the seventh lens side connection terminal with respect to the mount center point is the connection from the third lens side connection terminal to the twelfth lens side connection. An interchangeable lens, wherein the contact portion of any two adjacent lens-side connection terminals among the terminals is approximately twice the inner angle formed with respect to the mount center point. The interchangeable lens according to claim 4,
When a voltage is supplied from the camera body to the eleventh lens side connection terminal, between the first lens side connection terminal and the seventh lens side connection terminal in the circumferential direction around the mount center point. Includes an area in which the ground terminal of the body side connection terminal is disposed. 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;
A holding portion in which eleven lens-side connection terminals each having a contact portion that contacts one body-side connection terminal are disposed;
An optical system including a driven member that can be driven;
A drive unit for driving the driven member;
A communication unit that performs data communication with the camera body;
The eleven 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;
The communication unit determines the fourth lens side connection terminal based on the first asynchronous signal output from the eighth lens side connection terminal and the first clock signal input to the third lens side connection terminal. And receiving the first data signal from the camera body, transmitting the second data signal to the camera body using the fifth lens side connection terminal, and connecting the ninth lens side. Based on the second asynchronous signal input to the terminal, the third asynchronous signal output from the tenth lens side connection terminal, and the second clock signal input to the sixth lens side connection terminal, An operating voltage for transmitting the third data signal to the camera body using the 7 lens side connection terminal is supplied from the 11th lens side connection terminal supplied from the camera body. Ri,
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 arbitrarily selected from the 11 lens side connection terminals The contact portion of the two lens side connection terminals is the largest of the inner angles formed with respect to the mount center point,
The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the second lens side connection terminal with respect to the mount center point is the connection from the third lens side connection terminal to the eleventh lens side connection. The contact portion of any one of the terminals and the contact portion of the first 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 first lens side connection terminal and the contact portion of the seventh lens side connection terminal with respect to the mount center point is from the third lens side connection terminal to the sixth lens side connection terminal. The contact portion of any one of the eighth lens side connection terminal to the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal are smaller than an inner angle formed with respect to the mount center point. ,
The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the sixth lens side connection terminal with respect to the mount center point is from the third lens side connection terminal to the fifth lens side connection terminal. The contact portion of any one of the eighth lens side connection terminal to the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal are smaller than an inner angle formed with respect to the mount center point. ,
The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the tenth lens side connection terminal with respect to the mount center point is the third lens side connection terminal to the fifth lens side connection. Any one of the contact and the eighth lens side connection terminal, the ninth lens side connection terminal, and the eleventh lens side connection terminal and the contact part of the first lens side connection terminal Smaller than the inner angle formed with respect to the mount center point,
The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the ninth lens side connection terminal with respect to the mount center point is the fifth lens side connection from the third lens side connection terminal. From an inner angle formed by the contact portion of any one of the terminal, the eighth lens side connection terminal, and the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal with respect to the mount center point. small,
The inner angle formed by the contact portion of the first lens side connection terminal and the contact portion of the eighth lens side connection terminal with respect to the mount center point is the third lens side connection terminal to the fifth lens side connection. The contact portion of any one of the terminal and the eleventh lens side connection terminal and the contact portion of the first lens side connection terminal are smaller than an inner angle formed with respect to the mount center point,
The internal angles formed by the contact portion of the first lens side connection terminal and the contact portion of the fifth lens side connection terminal with respect to the mount center point are the third lens side connection terminal and the fourth lens side connection. A contact angle between any one of the terminal and the eleventh lens side connection terminal and the contact portion of the first 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 first lens side connection terminal and the contact portion of the fourth lens side connection terminal with respect to the mount center point is the third lens side connection terminal and the eleventh lens side connection. The contact portion of any one of the terminals and the contact portion of the first 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 first lens side connection terminal and the contact portion of the third 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 third lens side connection terminal and the contact portion of the eleventh lens side connection terminal with respect to the mount center point is the tenth lens side connection from the first lens side connection terminal. An interchangeable lens, wherein the contact portion of any two adjacent lens-side connection terminals among the terminals is approximately twice the inner angle formed with respect to the mount center point. The interchangeable lens according to claim 6,
When a voltage is supplied from the camera body to the eleventh lens side connection terminal, between the third lens side connection terminal and the eleventh lens side connection terminal in the circumferential direction around the mount center point. Includes an area in which the ground terminal of the body side connection terminal is disposed.

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