JP4924755B2 - Interchangeable lenses, camera bodies and electronic equipment - Google Patents

Description

  The present invention relates to an interchangeable lens, a camera body, and an electronic device.

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

Japanese Patent Laid-Open No. 7-234432

  In the camera body and the interchangeable lens described in Patent Document 1, among terminal groups for communication, a terminal group located at one end not adjacent to a power supply terminal group is affected by external noise. It becomes easy.

The invention according to claim 1 is an interchangeable lens that is detachable from the camera body and includes a holding portion in which a plurality of contact points are arranged, and drives an optical system including a driven member and the driven member. The first clock signal is input from the driving means, the first contact to which a driving voltage for operating the driving means from the camera body is supplied, the second contact serving as a ground terminal corresponding to the driving voltage, and the camera body. A third contact, a fourth contact that receives the first data signal from the camera body in synchronization with the first clock signal, and a second contact that outputs the second data signal to the camera body in synchronization with the first clock signal. 5 contacts, a sixth contact for receiving the second clock signal from the camera body, a seventh contact for outputting the third data signal to the camera body in synchronization with the second clock signal, the first clock signal and the first 2 An eighth contact for outputting a first asynchronous signal not synchronized with the lock signal to the camera body, a ninth contact for inputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal from the camera body; Based on the tenth contact that outputs the third asynchronous signal that is not synchronized with the clock signal and the second clock signal to the camera body, the first asynchronous signal that is output from the eighth contact, and the first clock signal that is input at the third contact, A second data signal is received from the camera body using the fourth contact, a second data signal is transmitted to the camera body using the fifth contact, and the second asynchronous signal input at the ninth contact. Based on the third asynchronous signal output from the tenth contact and the second clock signal input at the sixth contact, the third data signal to the camera body using the seventh contact The operation voltage for performing communication is provided with an eleventh contact supplied from the camera body and a twelfth contact serving as a ground terminal corresponding to the operation voltage. The twelve contacts from the first contact to the twelfth contact are The first contact is arranged at one end of the arrangement of the twelve contacts, the eleventh contact is arranged at the other end of the arrangement, and the second contact is arranged of the twelve contacts. In the arrangement, the interchangeable lens is arranged next to the first contact, and the twelfth contact is arranged next to the eleventh contact in the arrangement of twelve contacts.
The invention according to claim 2 is an interchangeable lens that is detachable from the camera body and includes a holding portion in which a plurality of contacts are arranged, and drives the optical system including the driven member and the driven member. The first clock signal is input from the driving means, the first contact to which a driving voltage for operating the driving means from the camera body is supplied, the second contact serving as a ground terminal corresponding to the driving voltage, and the camera body. A third contact, a fourth contact that receives the first data signal from the camera body in synchronization with the first clock signal, and a second contact that outputs the second data signal to the camera body in synchronization with the first clock signal. 5 contacts, a sixth contact for receiving the second clock signal from the camera body, a seventh contact for outputting the third data signal to the camera body in synchronization with the second clock signal, the first clock signal and the first 2 An eighth contact for outputting a first asynchronous signal not synchronized with the lock signal to the camera body, a ninth contact for inputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal from the camera body; Based on the tenth contact that outputs the third asynchronous signal that is not synchronized with the clock signal and the second clock signal to the camera body, the first asynchronous signal that is output from the eighth contact, and the first clock signal that is input at the third contact, First communication means for receiving the first data signal from the camera body using the fourth contact and transmitting the second data signal to the camera body using the fifth contact, and input at the ninth contact Based on the second asynchronous signal, the third asynchronous signal output from the tenth contact, and the second clock signal input from the sixth contact, the third data to the camera body using the seventh contact. A second communication means for transmitting a signal; an eleventh contact to which operating voltages of the first communication means and the second communication means are supplied from the camera body; and a twelfth contact serving as a ground terminal corresponding to the operating voltage. The twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion, the first contact is at one end of the twelve contact arrangement, and the eleventh contact is the other end of the arrangement. And the second contact is arranged next to the first contact in the arrangement of twelve contacts, and the twelfth contact is arranged next to the eleventh contact in the arrangement of twelve contacts. It is an interchangeable lens characterized by.
The invention according to claim 3 is an interchangeable lens that is detachable from the camera body and includes a holding portion in which a plurality of contacts are arranged, and drives an optical system including a driven member and the driven member. The first clock signal is input from the driving means, the first contact to which a driving voltage for operating the driving means from the camera body is supplied, the second contact serving as a ground terminal corresponding to the driving voltage, and the camera body. A third contact, a fourth contact that receives the first data signal from the camera body in synchronization with the first clock signal, and a second contact that outputs the second data signal to the camera body in synchronization with the first clock signal. 5 contacts, a sixth contact for receiving the second clock signal from the camera body, a seventh contact for outputting the third data signal to the camera body in synchronization with the second clock signal, the first clock signal and the first 2 An eighth contact for outputting a first asynchronous signal not synchronized with the lock signal to the camera body, a ninth contact for inputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal from the camera body; A tenth contact that outputs to the camera body a third asynchronous signal that is not synchronized with the clock signal and the second clock signal; an eleventh contact that is supplied with an operating voltage having a voltage value different from the drive voltage; And 12 contacts from the first contact to the 12th contact are arranged in a line on the holding portion, and the first contact is one of the 12 contact arrangements. The eleventh contact is disposed at the other end of the arrangement, the second contact is disposed next to the first contact in the twelve contact arrangement, and the twelfth contact is the twelve contact of the twelve contacts. Arrangement Oite, an interchangeable lens, characterized in that disposed next to the second 11 contacts.
According to a tenth aspect of the present invention, there is provided a camera body having a holding portion in which an interchangeable lens having a driven member is detachable and a plurality of contact points are arranged, and for driving the driven member to the interchangeable lens. A first contact for supplying a driving voltage, a second contact serving as a ground terminal corresponding to the driving voltage, a third contact for outputting a first clock signal to the interchangeable lens, and the interchangeable lens in synchronization with the first clock signal. A fourth contact for outputting the first data signal to the second contact, a fifth contact for receiving the second data signal from the interchangeable lens in synchronization with the first clock signal, and a sixth contact for outputting the second clock signal to the interchangeable lens. A contact, a seventh contact in which a third data signal is input from the interchangeable lens in synchronization with the second clock signal, and a first asynchronous signal not synchronized with the first clock signal and the second clock signal are input from the interchangeable lens. An eighth contact, a ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens, and a third asynchronous signal not synchronized with the first clock signal and the second clock signal. Based on the tenth contact input from the interchangeable lens, the first clock signal output from the third contact, and the first asynchronous signal input at the eighth contact, the first data signal to the interchangeable lens using the fourth contact And the second data signal from the interchangeable lens using the fifth contact, and the second clock signal output from the sixth contact, the second asynchronous signal output from the ninth contact, And an eleventh contact for supplying an operating voltage to the interchangeable lens in order to receive the third data signal from the interchangeable lens using the seventh contact based on the third asynchronous signal input at the tenth contact. A 12th contact serving as a ground terminal corresponding to the operating voltage, and 12 contacts from the 1st contact to the 12th contact are arranged in a row in the holding portion, and the 1st contact is the 12 contacts The eleventh contact is arranged at one end of the arrangement, respectively, at the other end of the arrangement, the second contact is arranged next to the first contact in the arrangement of twelve contacts, and the twelve contacts are arranged at twelve. The camera body is characterized in that the camera body is arranged next to the eleventh contact.
According to an eleventh aspect of the present invention, there is provided a camera body that is detachable from an interchangeable lens having a driven member and includes a holding portion in which a plurality of contact points are arranged, and for driving the driven member to the interchangeable lens. A first contact for supplying a driving voltage, a second contact serving as a ground terminal corresponding to the driving voltage, a third contact for outputting a first clock signal to the interchangeable lens, and the interchangeable lens in synchronization with the first clock signal. A fourth contact for outputting the first data signal to the second contact, a fifth contact for receiving the second data signal from the interchangeable lens in synchronization with the first clock signal, and a sixth contact for outputting the second clock signal to the interchangeable lens. A contact, a seventh contact in which a third data signal is input from the interchangeable lens in synchronization with the second clock signal, and a first asynchronous signal not synchronized with the first clock signal and the second clock signal are input from the interchangeable lens. An eighth contact, a ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens, and a third asynchronous signal not synchronized with the first clock signal and the second clock signal. Based on the tenth contact input from the interchangeable lens, the first clock signal output from the third contact, and the first asynchronous signal input at the eighth contact, the first data signal to the interchangeable lens using the fourth contact The first communication means for transmitting the second data signal from the interchangeable lens using the fifth contact, the second clock signal output from the sixth contact, the second asynchronous signal output from the ninth contact , And the second communication means for receiving the third data signal from the interchangeable lens using the seventh contact based on the third asynchronous signal inputted at the tenth contact, and the drive voltage applied to the interchangeable lens is different from the drive voltage. An eleventh contact for supplying a voltage and a twelfth contact serving as a ground terminal corresponding to the operating voltage, and the twelve contacts from the first contact to the twelfth contact are arranged in a line on the holding portion, One contact is arranged at one end of the arrangement of 12 contacts, the eleventh contact is arranged at the other end of the arrangement, and the second contact is arranged next to the first contact in the arrangement of 12 contacts. The twelfth contact is a camera body that is arranged next to the eleventh contact in the arrangement of twelve contacts.
According to a twelfth aspect of the present invention, there is provided a camera body having a holding portion in which an interchangeable lens having a driven member is detachable and a plurality of contact points are disposed, and for driving the driven member to the interchangeable lens. A first contact for supplying a driving voltage, a second contact serving as a ground terminal corresponding to the driving voltage, a third contact for outputting a first clock signal to the interchangeable lens, and the interchangeable lens in synchronization with the first clock signal. A fourth contact for outputting the first data signal to the second contact, a fifth contact for receiving the second data signal from the interchangeable lens in synchronization with the first clock signal, and a sixth contact for outputting the second clock signal to the interchangeable lens. A contact, a seventh contact in which a third data signal is input from the interchangeable lens in synchronization with the second clock signal, and a first asynchronous signal not synchronized with the first clock signal and the second clock signal are input from the interchangeable lens. An eighth contact, a ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens, and a third asynchronous signal not synchronized with the first clock signal and the second clock signal. A tenth contact input from the interchangeable lens, an eleventh contact for supplying an operating voltage different from the driving voltage to the interchangeable lens, and a twelfth contact serving as a ground terminal corresponding to the operating voltage. The twelve contacts of the twelfth contact are arranged in a line in the holding portion, the first contact is arranged at one end of the arrangement of the twelve contacts, the eleventh contact is arranged at the other end of the arrangement, The two contacts are arranged next to the first contact in the arrangement of twelve contacts, and the twelfth contact is arranged next to the eleventh contact in the arrangement of twelve contacts. It is.
The invention according to claim 16 is an electronic apparatus that is detachable with an interchangeable lens having a driven member and includes a holding portion in which a plurality of contacts are arranged, and is for causing the interchangeable lens to drive the driven member. A first contact for supplying a driving voltage, a second contact serving as a ground terminal corresponding to the driving voltage, a third contact for outputting a first clock signal to the interchangeable lens, and the interchangeable lens in synchronization with the first clock signal. A fourth contact for outputting the first data signal to the second contact, a fifth contact for receiving the second data signal from the interchangeable lens in synchronization with the first clock signal, and a sixth contact for outputting the second clock signal to the interchangeable lens. A contact, a seventh contact that receives the third data signal from the interchangeable lens in synchronization with the second clock signal, and a first asynchronous signal that does not synchronize with the first and second clock signals are input from the interchangeable lens. Ru An eighth contact, a ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens, and a third asynchronous signal not synchronized with the first clock signal and the second clock signal are interchangeable lenses. Transmission of the first data signal to the interchangeable lens using the fourth contact based on the tenth contact input from the first contact, the first clock signal output from the third contact, and the first asynchronous signal input from the eighth contact. And receiving the second data signal from the interchangeable lens using the fifth contact, and the second clock signal output from the sixth contact, the second asynchronous signal output from the ninth contact, and the second An eleventh contact for supplying an operating voltage to the interchangeable lens in order to receive the third data signal from the interchangeable lens using the seventh contact based on the third asynchronous signal input at the ten contacts; A 12th contact serving as a ground terminal corresponding to the working voltage, and the 12 contacts from the first contact to the 12th contact are arranged in a line in the holding portion, and the first contact is an arrangement of 12 contacts. The eleventh contact is disposed at the other end of the arrangement, the second contact is disposed adjacent to the first contact in the arrangement of the twelve contacts, and the twelfth contact is disposed at the twelve contacts. In the arrangement of the contacts, the electronic apparatus is arranged adjacent to the eleventh contact.

  According to the present invention, good communication can be performed.

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. 2 is a front view of a lens mount 101 and a lens mount 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.

(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 lens mount 101 to which the interchangeable lens 200 is detachably attached. As shown in FIG. 3B and FIG. 4B, the position near the lens mount 101 of the camera body 100 (inner peripheral side of the lens mount 101) is partially on the inner peripheral side of the lens mount 101. A holding part (electrical connection part) 102 that holds the contact in a protruding state is provided. The holding portion 102 is provided with a plurality of contacts.

  The interchangeable lens 200 is provided with a lens mount 201 to which the camera body 100 is detachably attached corresponding to the lens mount 101 on the body side. As shown in FIG. 3A and FIG. 4A, the position of the interchangeable lens 200 in the vicinity of the lens mount 201 (inner peripheral side of the lens mount 201) is partially on the inner peripheral side of the lens mount 201. A holding portion (electrical connection portion) 202 that holds the contact in a protruding state is provided. The holding portion 202 is provided with a plurality of contacts.

  When the interchangeable lens 200 is attached to the camera body 100, the holding unit 102 (described in detail later) provided with a plurality of contacts is electrically connected to the holding unit 202 (described in detail later) provided with a plurality of contacts. Physically connected. Both holders 102 and 202 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 imaging element 104 is provided behind the lens mount 101 in the camera body 100. Above the camera body 100, a button 107 serving as an input device is provided. The user uses the input device such as the button 107 to instruct the camera body 100 to shoot, 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-side control unit 203 that controls each part of the interchangeable lens 200 is provided. The lens side control unit 203 includes a microcomputer (not shown) and its peripheral circuits. The lens-side 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 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 CPU 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 shake correction lens that can move in a moving direction that includes a component (X, Y direction component) in a direction perpendicular to the optical axis direction of the imaging optical system 210. A blur correction mechanism to be performed 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-side control unit 203 uses the lens driving unit 212 and the lens position detection unit 213 to drive the blur correction lens, the diaphragm member, and the zoom lens. Control position detection.

  The ROM 215 is a non-volatile storage medium, and stores a predetermined control program executed by the lens side 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-side 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-side control unit 103 that controls each part of the camera body 100 is provided. The body side control unit 103 includes a microcomputer (not shown), a RAM, and peripheral circuits thereof.

  The body side control unit 103 is connected to the body side first communication unit 117 and the body side second communication unit 118. 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 side control unit 103 performs communication (hotline communication, command data communication) to be described later with the interchangeable lens 200 (lens side 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-side control unit 103 displays various menu screens for setting a subject image (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. FIG. 3 simply shows the mounting structure. For this reason, the drawing is such that the lens mount 101 and the holding portion 102 of the camera body 100 are on the same plane. However, in an actual mount structure, the holding portion 102 is disposed at a location deeper than the mount surface of the lens mount 101 of the camera body 100 (a location on the right side of the lens mount 101 in FIG. 3).

  In FIG. 3, since the mount structure on the interchangeable lens side is also simply described, the lens mount 201 and the holding portion 202 of the interchangeable lens 200 are on the same plane. However, in practice, the holding portion 202 is disposed at a location protruding from the mount surface of the lens mount 201 (a location on the right side of the lens mount 201 in FIG. 3). Actually, since the lens mount 101 and the mount surface of the lens mount 201 are brought into contact with each other and the camera body 100 and the interchangeable lens 200 are mounted and connected, the holding unit 102 and the holding unit 102 are held. The part 202 is connected, and the electrical contacts provided in both holding parts are also connected. Since such a mount structure is well known, further explanation and illustration are omitted.

  As shown in FIG. 3, the holding unit 102 has 12 contacts BP <b> 1 to BP <b> 12. The holding unit 202 has twelve contacts LP1 to LP12 corresponding to the twelve contacts described above.

  The contact BP1 and the contact BP2 are connected to the first power supply circuit 120 in the camera body 100. The first power supply circuit 120 supplies the operating voltage of each part in the interchangeable lens 200 excluding the lens driving part 212 to the contact point BP1. That is, the operating voltage of each part (including the lens side first communication unit 217 and the lens side second communication unit 218) in the interchangeable lens 200 excluding the lens driving unit 212 is supplied from the contact point BP1 and the contact point LP1. The voltage value that can be supplied to the contact point BP1 has a range between the minimum voltage value and the maximum voltage value (for example, a voltage width in the 3V range). The voltage value that is normally supplied is the maximum voltage value and the minimum voltage value. Is a voltage value in the vicinity of the intermediate 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 mA to several hundreds mA in the power-on state.

  The contact BP2 is a ground terminal corresponding to the operating voltage given to the contact BP1. That is, the contact BP2 and the contact LP2 are ground terminals corresponding to the above operating voltage.

  In the following description, the signal line constituted by the contact point BP1 and the contact point LP1 is referred to as a signal line V33. A signal line constituted by the contact point BP2 and the contact point LP2 is referred to as a signal line GND. These contacts LP1, LP2, BP1, BP2 constitute a power supply system contact for supplying power from the camera body 100 side to the interchangeable lens 200 side.

  The contacts BP3, BP4, BP5, and BP6 are connected to the body-side first communication unit 117. The contact points LP3, LP4, LP5, and LP6 on the interchangeable lens 200 side corresponding to these contact points are connected to the lens-side first communication unit 217. 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 contact points (communication system contact points). 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 contact BP3 and the contact LP3 is referred to as a signal line CLK. Similarly, the signal line constituted by the contact BP4 and the contact LP4 is signal line BDAT, the signal line constituted by the contact BP5 and the contact LP5 is signal line LDAT, and the signal line constituted by the contact BP6 and the contact LP6 is signaled. Called line RDY.

  The contacts BP7, BP8, BP9, and BP10 are connected to the body-side second communication unit 118. The contacts LP7, LP8, LP9, and LP10 on the interchangeable lens 200 side corresponding to these contacts are connected to the lens-side second communication unit 218. The lens-side second communication unit 218 transmits data to the body-side second communication unit 118 using these contacts (communication system contacts). 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, a signal line constituted by the contact BP7 and the contact LP7 is referred to as a signal line HREQ. Similarly, a signal line composed of the contact point BP8 and the contact point LP8 is signal line HANS, a signal line composed of the contact point BP9 and the contact point LP9 is signal line HCLK, and a signal line composed of the contact point BP10 and the contact point LP10 is signaled. Called line HDAT.

  The contact BP11 and the contact BP12 are connected to the second power supply circuit 121 in the camera body 100. The second power supply circuit 121 supplies the driving voltage of the lens driving unit 212 to the contact point BP12. That is, the driving voltage of the lens driving unit 212 is supplied from the contact point BP12 and the contact point LP12. The voltage value that can be supplied to the contact point BP12 has a range from the minimum voltage value to the maximum voltage value, all of which are larger than the voltage value range that can be supplied to the contact point BP1 (for example, The maximum voltage value that can be supplied to the contact point BP12 is several times the maximum voltage value that can be supplied to the contact point BP1). That is, the voltage value supplied to the contact point BP12 is a voltage value whose magnitude is different from the voltage value supplied to the contact point BP1. The voltage value that is normally supplied to the contact BP12 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 contact BP12. As a result, 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 contact BP11 is a ground terminal corresponding to the drive voltage given to the contact BP12. That is, the contact BP11 and the contact LP11 are ground terminals corresponding to the drive voltage.

  In the following description, a signal line constituted by the contact BP11 and the contact LP11 is referred to as a signal line PGND. A signal line constituted by the contact BP12 and the contact LP12 is referred to as a signal line BAT. These contacts LP11, LP12, BP11, BP12 constitute a power supply system contact for supplying power from the camera body 100 side to the interchangeable lens 200 side.

  As is apparent from the magnitude relationship between the voltage value (current value) supplied to the contacts BP12 and LP12 and the voltage value (current value) supplied to the contacts BP1 and LP1, the voltages are supplied to the contacts. The difference between the maximum value and the minimum value of the current flowing through the contact point BP11 and the contact point LP11 serving as the ground terminals for each of the voltages is larger than the difference between the maximum value and the minimum value of the current flowing through the contact point BP2 and the contact point LP2. ing. This is because the power consumed by the lens driving unit 212 having a driving system such as an actuator is larger than that of an electronic circuit such as the lens side control unit 203 in the interchangeable lens 200, and it is necessary to drive the focus lens 210b. If not, the lens driving unit 212 does not consume power.

  FIG. 4 is a front view of the lens mount 101 and the lens mount 201. 4A is a view of the lens mount 201 of the interchangeable lens 200 as viewed from the camera body 100 side, and FIG. 4B is a view of the lens mount 101 of the camera body 100 as viewed from the interchangeable lens 200 side. is there.

  As shown in FIG. 4A, contacts LP3, LP4, LP5, and LP6 are provided in the holding portion 202 in a direction along the lens mount 201 (appearance is along a part of a lens mount having a substantially circular shape. Arranged in an arc shape (arc shape) in an orderly manner in the arc direction). Further, the contacts LP7, LP8, LP9, and LP10 are arranged in an orderly manner in a circular arc shape on the extending direction (the arc direction) in which the contacts LP3 to LP6 are arranged. Here, the contact LP6 is disposed at a position closer to the contacts LP7 to LP10 than the contacts LP3 to LP5. Further, the contacts LP7 and LP8 are arranged at positions closer to the contacts LP3 to LP6 than the contacts LP9 and LP10.

  The contacts LP11 and LP12 are arranged in an orderly manner in a circular arc shape in an extending direction in the direction in which the above-described contacts LP3 to LP6 are arranged (arc direction). Here, the contacts LP7 to LP10 are arranged between the contacts LP3 to LP6 and the contacts LP11 and LP12. Further, the contact LP10 is arranged next to the contact LP11.

  The contacts LP1 and LP2 are arranged in an orderly manner in a circular arc shape on the extending direction (the arc direction) in which the contacts LP3 to LP6 are arranged. Here, the contacts LP3 to LP6 are arranged between the contacts LP7 to LP10 and the contacts LP1 and LP2. The contact LP2 is disposed at a position closer to the contacts LP3 to LP6 than the contact LP1.

  That is, the above-mentioned twelve contacts LP1 to LP12 are arranged in an orderly manner in an arc shape. In the present embodiment, the angle θ1 of the arc (the fan shape connecting the mount center and the center of the contact LP1 and the center of the contact LP12) is about 105 degrees, and the arc angle θ2 between the contacts is about 9.5 degrees. . In the present embodiment, the width of each of the twelve contacts in the arc direction is about 1.5 mm. Further, since the distance from the center of the mount to the center of each contact (LP1 to LP12) is about 15 mm, the distance in the arc direction between the centers of each contact is about 2.5 mm. Since the arc width of each contact is about 1 mm, the arc clearance between the contacts is about 1 mm.

  In addition, about the width | variety and clearance of each contact, it can change suitably. For example, the width of each contact in the arc direction may be increased or decreased in units of 1/10 mm (comma number of millimeters), and the width of the clearance in the arc direction may be increased in units of 1/10 mm (comma number of millimeters). It can be appropriately changed in units (for example, plus or minus 0.2 mm).

  Further, the contact LP3 is next to the contact LP2, the contact LP5 is next to the contact LP6, the contact LP4 is between the contacts LP3 and LP5, the contact LP7 is next to the contact LP6, and the contact LP8 is next to the contact LP9. , Respectively.

  When attention is paid to contacts that supply voltage from the camera body 100 to the interchangeable lens 200, it can be said that the arrangement of the contacts is as follows. The twelve contacts LP1 to LP12 are arranged in a circular arc on the holding portion 202. The contact LP12 is disposed at one end of this arcuate arrangement, and the contact LP1 is disposed at the other end. The contact LP11 is arranged next to the contact LP12, and the contact LP2 is arranged next to the contact LP1. The contacts LP3 to LP6 are arranged in an arc next to the contact LP2, and the contacts LP7 to LP10 are arranged in an arc next to the contact LP11.

  That is, contacts LP1 and LP12 for supplying power supply voltage are arranged at both ends of contacts arranged in an arc shape, and contacts LP2 and LP11 which are ground terminals corresponding to the respective power supply voltages are arranged inside one of them. The The other communication system contacts LP3 to LP10 are arranged between these two ground terminals LP2 and LP11.

  Between the contacts LP3 to LP10, which are communication system contacts (communication system contacts), and the contacts LP1 and LP12 that supply the power supply voltage (the operation voltage and the drive voltage described above) among the power system contacts. The reason why the contacts (ground contacts) LP2 and LP11 as the ground terminals are arranged is to minimize the influence of the power system contact (signal line) on the communication system contact (signal line).

  A signal line that supplies a power supply voltage (a signal line including LP1 and LP12) undergoes a large voltage change in accordance with a load variation at a power supply voltage supply destination. This large voltage change may adversely affect the communication system signal lines. In order to suppress this adverse effect, in the present embodiment, contacts for ground terminals (ground contacts LP2 and LP11) whose voltage changes are more stable than power supply contacts (LP1 and LP12) are connected to communication system contacts LP3 to LP10. The power supply contacts LP1 and LP12 are interposed.

  The contacts LP3 to LP6 connected to the lens side first communication unit 217 and the contacts LP7 to LP10 connected to the lens side second communication unit 218 are arranged next to each other, but the lens side first communication The contacts LP3, LP4, LP5 of the unit 217 and the contacts LP9, LP10 of the lens side second communication unit 218 are not arranged next to contacts connected to different (other) communication units (217 or 218). It is configured as follows. That is, the contacts LP6, LP7, and LP8 are collectively arranged at positions close to the contacts connected to different (other) communication units. As will be described later, this is because the contacts LP6, LP7, and LP8 have signals that are not synchronized with the clock signal (a signal having a relatively small change compared to the clock signal and the signal synchronized therewith, for example, a state per unit time). This is because a change is transmitted in a signal of about 1 kHz to several kHz. 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 away from the contacts connected to different (other) communication units. Therefore, in the present embodiment, a contact group (contacts LP3, LP4, LP5) for transmitting a clock signal and a signal synchronized therewith in the lens side first communication unit 217, and a clock signal in the lens side second communication unit 218 and the same. A contact arrangement is employed in which contact groups (contacts LP6, LP7, LP8) that transmit signals that are not synchronized with the clock signal are interposed between contact groups (contacts LP9, LP10) that transmit signals that are synchronized.

The contacts LP7 to LP10 are arranged closer to the second power supply circuit 121, and the contacts LP3 to LP6 are arranged closer to the first power supply circuit 120, respectively. This is because the contacts LP7 to LP10 are less affected by noise. The second power supply circuit 121 supplies power to the lens driving unit 212, but the power consumption of the lens driving unit 212 changes drastically between when the focusing lens 210b is driven and when it is not. Therefore, the magnitude of the current flowing through the contact LP11 changes drastically, and the influence on the contact of the adjacent communication system is larger than that of the contact LP2. However, as will be described later, the communication performed using the contacts LP7 to LP10 has a shorter cycle than the communication performed using the contacts LP3 to LP6. As will be described later, in this embodiment, communication using the contacts LP7 to LP10 is performed at a cycle of 1 msec, and communication using the contacts LP3 to LP6 is performed at a cycle of 16 msec. Even if communication fails due to the influence of the contact LP11, communication can be restarted promptly. In other words, even if the contacts LP7 to LP10 are arranged next to the contact LP11, it can be said that the influence of noise is small compared to the contacts LP3 to LP6.

  Further, the contact LP11 is arranged next to the contact LP10. This is because the contact LP10 is more resistant to noise than the contact LP9. As will be described later, a clock signal is transmitted to the contact LP9, and a data signal synchronized with the clock signal is transmitted to the contact LP10. If the rising and falling edges of the clock signal become unclear due to the influence of noise, the receiving side cannot correctly synchronize. On the other hand, the data signal is sampled at the signal level at the rising or falling timing of the clock signal. Therefore, it is sufficient that the signal level becomes clear at the above timing, and it can be said that the resistance to noise is higher than that of the clock signal.

  Note that the contact points BP1 to BP12 arranged in the holding unit 102 on the camera body 100 side shown in FIG. 4B are the same as the contact points LP1 to LP12 on the interchangeable lens 200 side described above, and thus the description thereof is omitted. As is clear from FIGS. 1 and 4, the camera body-side mount 101 faces the mount 201 on the interchangeable lens side and is then rotated and engaged. Therefore, as shown in FIGS. 4A and 4B, the arrangement direction of the contacts BP1 to BP12 is opposite to the arrangement direction of the contacts LP1 to LP12 (in FIG. 4, LP1 is at the left end). LP12 is arranged at the right end and BP1 is arranged at the right end and BP12 is arranged at the left end).

(Description of command data communication)
The lens-side control unit 203 controls the lens-side first communication unit 217 to control data from the body-side first communication unit 117 via the contacts LP3 to LP6, that is, the signal lines CLK, BDAT, LDAT, and RDY. And transmission of response data to the body side first communication unit 117 are performed in parallel at a first predetermined cycle (16 msec in the present embodiment). 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-side control unit 203 and the lens-side first communication unit 217 and the body-side control unit 103 and the body-side first communication unit 117 is referred to as “command data communication”. .

  FIG. 5 is a timing chart showing an example of command data communication. The body-side 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-side control unit 203 and the lens-side first communication unit 217 output an H (High) level signal from the contact LP6 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 side 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 side control unit 103 and the body side first communication unit 117 output the clock signal 401 from the contact point BP3. That is, the clock signal 401 is transmitted to the first lens side communication unit 217 via the signal line CLK. The body-side 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 contact point BP4 in synchronization with the clock signal 401. That is, the body side command packet signal 402 is transmitted to the first lens side communication unit 217 via the signal line BDAT.

  When the clock signal 401 is output to the signal line CLK, the lens-side control unit 203 and the lens-side first communication unit 217 synchronize with the clock signal 401, and the lens-side command that is the first half of the response data from the contact LP5. The 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-side 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 side 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 side 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 lens side first communication unit 217 outputs an L level signal from the contact LP6. That is, the signal level of the signal line RDY is set to L level (T3). The body-side control unit 103 and the body-side first communication unit 117 output a clock signal 405 from the contact point BP3 according to 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-side control unit 103 and the body-side first communication unit 117 output a body-side data packet signal 406 that is the latter half of the control data from the contact point 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 side control unit 203 and the lens side first communication unit 217 receive the data packet from the contact LP5 in synchronization with the clock signal 405 from the lens that is the latter half of the response data. A 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.

  The lens side 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 in response to the completion of transmission of the lens side data packet signal 407 (T4). The lens side control unit 203 starts a second control process 408 (described later) which 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 side 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-side control unit 203 analyzes the contents 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-side control unit 203 uses the checksum data included in the command packet signal 402 to simplify whether there is no error in the communication of the command packet signal 402 from the number of data bytes. A communication error check process 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-side 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 focus lens 210b and the received body side data packet signal 406 is the drive amount of the focus lens 210b will be described. As the first control process 404, the lens-side control unit 203 analyzes the content of the command packet signal 402 and generates an acknowledgment signal indicating that the content has been understood. Further, as the first control process 404, the lens side control unit 203 also executes the communication error check process as described above using the checksum data included in the command packet signal 402. 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 side control unit 203 executes an analysis process of the contents of the body side data packet signal 406 and performs communication as described above using the checksum data included in the body side data packet signal 406. Execute error check processing.

  When the second control process 408 is completed, the lens side control unit 203 notifies the lens side first communication unit 217 of the completion of the second control process 408. Accordingly, the lens side 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).

  When the received body-side command packet signal 402 is an instruction to drive a lens-side driven member (for example, a focus lens) as described above, the lens-side control unit 203 notifies the lens-side first communication unit 217. While the signal level of the signal line RDY is set to L level, the lens driving unit 212 is caused to execute processing for driving the focus 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-side command packet signal 402 and body-side data packet signal 406 are transmitted one by one by body-side control unit 103 and body-side first communication unit 117, respectively. 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-side command packet signal 403 and the lens-side data packet signal 407 are transmitted one by one by the lens-side control unit 203 and the lens-side first communication unit 217, respectively. 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-side control unit 203 and the lens-side first communication unit 217 receive control data from the body-side first communication unit 117 and transmit response data to the body-side first communication unit 117. Do it in parallel. The contact LP6 and the contact BP6 used for command data communication are contacts through which asynchronous signals (signal level of the signal line RDY / H (High) level or L (Low) level) that are not synchronized with other clock signals are transmitted. is there.

(Description of hotline communication)
The lens-side control unit 203 controls the lens-side second communication unit 218 to transmit lens position data to the body-side second communication unit 118 via the contacts LP7 to LP10, that is, the signal lines HREQ, HANS, HCLK, and HDAT. Send. 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 side control unit 203 and the lens side second communication unit 218 and the body side control unit 103 and the body side second communication unit 118 is referred to as “hot line communication”. .

  FIG. 6 is a timing chart showing an example of hotline communication. The body side 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. 6A is a diagram illustrating a state in which hotline communication is repeatedly performed at predetermined intervals Tn. FIG. 6B shows a state in which a certain communication period Tx is expanded in the hot line communication repeatedly executed. Hereinafter, the procedure of hotline communication will be described based on the timing chart of FIG.

  The body-side control unit 103 and the body-side second communication unit 118 first output an L level signal from the contact point BP7 when the hot line communication is started (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-side control unit 203 that this signal has been input to the contact LP7. In response to this notification, the lens-side 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-side control unit 203 causes the lens position detection unit 213 to detect the position of the focus lens 210b and generates lens position data representing a detection result.

  When the lens-side control unit 203 completes the generation process 501, the lens-side control unit 203 and the lens-side second communication unit 218 output an L level signal from the contact LP8 (T7). That is, the signal level of the signal line HANS is set to the L level. The body side control unit 103 and the body side second communication unit 118 output the clock signal 502 from the contact BP9 in response to the input of this signal to the contact BP8. That is, a clock signal is transmitted to the lens side second communication unit 218 via the signal line HCLK.

  The lens side control unit 203 and the lens side second communication unit 218 output a lens position data signal 503 representing lens position data from the contact LP10 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 side control unit 203 and the lens side second communication unit 218 output an H level signal from the contact LP8. 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 contact LP7 in response to the input of this signal to the contact BP8. 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, one lens position data signal 503 is transmitted by the lens side control unit 203 and the lens side second communication unit 218 in one hot line communication. The contacts LP7, LP8, BP7, and BP8 used for hotline communication are contacts through which asynchronous signals that are not synchronized with other clock signals are transmitted. That is, the contacts LP7 and BP7 are contacts through which an asynchronous signal (signal level HREQ signal level / H (High) level or L (Low) level) is transmitted, and the contacts LP8 and BP8 are asynchronous signals (signal line HANS). Signal level / H (High) level or L (Low) level).

  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) The contact point LP3 from which the clock signals 401 and 405 are transmitted from the camera body 100 to the holding unit 202 on the lens mount 201, and the body side command packet signal 402 and the body side data packet in synchronization with the clock signals 401 and 405. A contact LP4 from which the signal 406 is transmitted from the camera body 100, a contact LP5 from which the lens side command packet signal 403 and the lens side data packet signal 407 are transmitted to the camera body 100 in synchronization with the clock signals 401 and 405, and a clock signal. Contacts LP6 through which asynchronous signals that are not synchronized with 401 and 405 are transmitted to the camera body 100 are arranged in an arc shape. Further, a contact LP9 that transmits the clock signal 502 from the camera body 100 to the holding unit 202 on the lens mount 201, and a contact LP10 that transmits the lens position data signal 503 to the camera body 100 in synchronization with the clock signal 502. A contact LP7 that transmits an asynchronous signal that is not synchronized with the clock signal 502 from the camera body 100 and a contact LP8 that transmits an asynchronous signal that is not synchronized with the clock signal 502 to the camera body 100 are arranged in an arcuate extension direction. Arranged. The lens-side first communication unit 217 performs reception of control data from the camera body 100 and transmission of response data to the camera body 100 in parallel via the contacts LP3 to LP6. Further, the second lens side communication unit 218 transmits lens position data to the camera body 100 via the contacts LP7 to LP10. 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. The contact LP6 is disposed at a position closer to the contacts LP7 to LP10 than the contacts LP3 to LP5, and the contact LP7 and the contact LP8 are disposed closer to the contacts LP3 to LP6 than the contact LP9 and the contact LP10. Since it did in this way, the influence which two independent communication systems have on mutual communication can be minimized.

(2) A contact LP12 to which the driving voltage of the lens driving unit 212 is supplied from the camera body 100 to the holding unit 202 on the lens mount 201 and a contact LP11 serving as a ground terminal corresponding to the driving voltage are formed in an arc shape. Arranged side by side in the extension direction. Here, the contacts LP7 to LP10 are arranged between the contacts LP3 to LP6 and the contacts LP10 and LP11, and the contact LP10 is arranged next to the contact LP11. Since it did in this way, the influence which the signal wire | line BAT which supplies the drive voltage of the lens drive part 212 has on the signal wire | line for performing hot line communication can be minimized.

(3) Operation voltage for performing command data communication and hotline communication from the camera body 100 to the holding unit 202 on the lens mount 201 (operation voltages of the lens side first communication unit 217 and the lens side second communication unit 218). Are arranged side by side in the arc-shaped extending direction, and the contact LP1 serving as the ground terminal corresponding to the operating voltage is arranged. Here, the difference between the upper limit and the lower limit of the current flowing through the contact LP11 is larger than the difference between the upper limit and the lower limit of the current flowing through the contact LP2. The contacts LP3 to LP6 are disposed between the contacts LP7 to LP10 and the contacts LP1 and LP2, and the contact LP2 is disposed at a position closer to the contacts LP3 to LP6 than the contact LP1. Since it did in this way, the influence which the signal wire | line V33 has on the signal wire | line for performing command data communication can be minimized. Further, it is possible to minimize the influence of the change in the current flowing through the signal line PGND on the signal line of the communication system.

(4) The contact LP3 is arranged next to the contact LP2, the contact LP5 is arranged next to the contact LP6, the contact LP4 is arranged between the contacts LP3 and LP5, and the contact LP7 is arranged next to the contact LP6. The contact LP8 is arranged next to the contact LP9. Since it did in this way, the influence of the noise which arises between each contact can be minimized.

(5) A contact LP12 to which a drive voltage for operating the lens driving unit 212 is supplied from the camera body 100, a contact LP11 that is a ground terminal corresponding to the drive voltage, and clock signals 401 and 405 from the camera body 100. In synchronization with the transmitted contact LP3 and the clock signals 401 and 405, in synchronization with the contact LP4 and the clock signals 401 and 405 to which the body side command packet signal 402 and the body side data packet signal 406 are transmitted from the camera body 100. In synchronization with the clock signal 502, the contact LP5 to which the lens side command packet signal 403 and the lens side data packet signal 407 are transmitted to the camera body 100, the contact LP9 to which the clock signal 502 is transmitted from the camera body 100, Lens position on camera body 100 Data signal 503 is transmitted to the contact LP10, and the asynchronous signal that is not synchronized with the clock signals 401, 405 and the clock signal 502 is synchronized with the clock signal 401, 405 and the clock signal 502. A contact LP7 from which an asynchronous signal is transmitted from the camera body 100, a contact LP8 from which an asynchronous signal not synchronized with the clock signals 401, 405 and the clock signal 502 is transmitted to the camera body 100, and the lens side first communication unit from the camera body 100 Twelve contacts, the contact LP1 to which the operating voltage of 217 and the lens-side second communication unit 218 is supplied, and the contact LP2 that is a ground terminal corresponding to the operating voltage are connected to the holding unit 202 on the lens mount 201. Arranged in an arc. Here, the contact LP12 is disposed at one end of the array of twelve contacts, and the contact LP1 is disposed at the other end. Further, the contact LP11 is arranged next to the contact LP12, and the contact LP2 is arranged next to the contact LP1. Since it did in this way, the influence on the communication system by the noise from the outside is suppressed.

(6) The contact LP3, the contact LP4, the contact LP5, and the contact LP6 are arranged in an arc next to the contact LP2, and the contact LP7, the contact LP8, the contact LP9, and the contact LP10 are the contacts. Next to LP11, they are arranged in an arc. Since it did in this way, the influence which two independent communication system lines mutually have can be minimized.

  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. 4, a plurality of contacts are arranged in a line along the edge of the mount. You may arrange | position these several contacts in a line with a form other than this. For example, a plurality of contacts may be arranged in a straight line. Further, the plurality of contacts may be arranged at any position on the lens mounts 101 and 201. In FIG. 4, a plurality of contact points are arranged at the lower part of the lens mounts 101 and 201, but they may be arranged at the upper part or at the left and right.

(Modification 2)
In the embodiment described above, the position data of the focus 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 also transmit status information of driven members other than the focus 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 process 501 shown in FIG. 6B, a process for generating position data of the blur correction lens, and control position data for the diaphragm that forms 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 contact points).

(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 side control unit 103 and the lens side control unit 203, a body side control unit or a lens side control unit in which the functions of these communication interfaces are incorporated may be used.

(Modification 5)
In the above embodiment, the camera system including the camera body 100 and the interchangeable lens 200 has been described. However, the present invention is not limited to the camera system. If the electronic device includes a mount that can be attached to and detached from the interchangeable lens 200, can communicate with the interchangeable lens 200, and can supply power to the interchangeable lens, the electronic device can be configured as described in the above embodiment (on the camera body side) Configuration) is applicable. As such an electronic device, for example, a projector can be considered. By configuring the projection lens portion of the projector as a detachable exchangeable projection lens, a projector system similar to the above embodiment can be obtained.

(Modification 6)
In the above-described embodiment, the shake correction mechanism includes a shake correction lens that can move so as to have a component in a direction perpendicular to the optical axis direction of the imaging optical system 210, and the camera shake correction is performed by driving the shake correction lens. Stated what to do. However, the blur correction mechanism is not limited to this, and a blur correction mechanism that rotates (swings) the blur correction optical system in an in-plane direction including the optical axis of the imaging optical system 210 may be used.

  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, 201 ... Lens mount, 102, 202 ... Holding part, 103 ... Body side control part, 117 ... Body side 1st communication part, 118 ... Body side 2nd communication part, 200 ... Interchangeable lens, 203... Lens side control unit, 210... Imaging optical system, 217... First lens side communication unit, 218.

Claims (16)

An interchangeable lens that is detachable from the camera body and has a holding part in which a plurality of contacts are arranged,
An optical system including a driven member;
Driving means for driving the driven member;
A first contact to which a driving voltage for operating the driving means is supplied from the camera body;
A second contact serving as a ground terminal corresponding to the drive voltage;
A third contact for receiving a first clock signal from the camera body;
A fourth contact to which a first data signal is input from the camera body in synchronization with the first clock signal;
A fifth contact for outputting a second data signal to the camera body in synchronization with the first clock signal;
A sixth contact for receiving a second clock signal from the camera body;
A seventh contact for outputting a third data signal to the camera body in synchronization with the second clock signal;
An eighth contact for outputting a first asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
A ninth contact 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 contact for outputting a third asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
Receiving the first data signal from the camera body using the fourth contact based on the first asynchronous signal output from the eighth contact and the first clock signal input at the third contact; The second data signal is transmitted to the camera body using the fifth contact, the second asynchronous signal input from the ninth contact, and the third asynchronous signal output from the tenth contact. And an operating voltage for transmitting the third data signal to the camera body using the seventh contact based on the second clock signal input at the sixth contact. An eleventh contact that is
A twelfth contact serving as a ground terminal corresponding to the operating voltage,
Twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion,
The first contact is arranged at one end of the arrangement of the twelve contacts, and the eleventh contact is arranged at the other end of the arrangement,
The second contact is arranged next to the first contact in the arrangement of the twelve contacts.
The twelfth contact is disposed next to the eleventh contact in the arrangement of the twelve contacts. An interchangeable lens that is detachable from the camera body and has a holding part in which a plurality of contacts are arranged,
An optical system including a driven member;
Driving means for driving the driven member;
A first contact to which a driving voltage for operating the driving means is supplied from the camera body;
A second contact serving as a ground terminal corresponding to the drive voltage;
A third contact for receiving a first clock signal from the camera body;
A fourth contact to which a first data signal is input from the camera body in synchronization with the first clock signal;
A fifth data signal is output to the camera body in synchronization with the first clock signal.
Contacts,
A sixth contact for receiving a second clock signal from the camera body;
A seventh contact for outputting a third data signal to the camera body in synchronization with the second clock signal;
An eighth contact for outputting a first asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
A ninth contact 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 contact for outputting a third asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
Receiving the first data signal from the camera body using the fourth contact based on the first asynchronous signal output from the eighth contact and the first clock signal input at the third contact; First communication means for performing transmission of the second data signal to the camera body using the fifth contact;
Based on the second asynchronous signal input from the ninth contact, the third asynchronous signal output from the tenth contact, and the second clock signal input from the sixth contact, the seventh contact is used. Second communication means for transmitting the third data signal to the camera body;
An eleventh contact to which operating voltages of the first communication means and the second communication means are supplied from the camera body;
A twelfth contact serving as a ground terminal corresponding to the operating voltage,
Twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion,
The first contact is arranged at one end of the arrangement of the twelve contacts, and the eleventh contact is arranged at the other end of the arrangement,
The second contact is arranged next to the first contact in the arrangement of the twelve contacts.
The twelfth contact is disposed next to the eleventh contact in the arrangement of the twelve contacts. An interchangeable lens that is detachable from the camera body and has a holding part in which a plurality of contacts are arranged,
An optical system including a driven member;
Driving means for driving the driven member;
A first contact to which a driving voltage for operating the driving means is supplied from the camera body;
A second contact serving as a ground terminal corresponding to the drive voltage;
A third contact for receiving a first clock signal from the camera body;
A fourth contact to which a first data signal is input from the camera body in synchronization with the first clock signal;
A fifth contact for outputting a second data signal to the camera body in synchronization with the first clock signal;
A sixth contact for receiving a second clock signal from the camera body;
A seventh contact for outputting a third data signal to the camera body in synchronization with the second clock signal;
An eighth contact for outputting a first asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
A ninth contact 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 contact for outputting a third asynchronous signal not synchronized with the first clock signal and the second clock signal to the camera body;
An operating voltage having a voltage value different from the driving voltage is supplied from the camera body.
Contacts,
A twelfth contact serving as a ground terminal corresponding to the operating voltage,
Twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion,
The first contact is arranged at one end of the arrangement of the twelve contacts, and the eleventh contact is arranged at the other end of the arrangement,
The second contact is arranged next to the first contact in the arrangement of the twelve contacts.
The twelfth contact is disposed next to the eleventh contact in the arrangement of the twelve contacts. The interchangeable lens according to claim 3,
The interchangeable lens, wherein a voltage value of the operating voltage is smaller than a voltage value of the driving voltage. In the interchangeable lens as described in any one of Claims 1-4,
With regard to the arrangement of the twelve contacts, the third contact is disposed adjacent to the twelfth contact on the opposite side of the eleventh contact, and the fourth contact is the twelfth with respect to the third contact. The fifth contact is disposed next to the third contact with respect to the fourth contact, and the eighth contact is disposed with respect to the fifth contact. An interchangeable lens, which is disposed next to a side opposite to the fourth contact. In the interchangeable lens as described in any one of Claims 1-4,
With regard to the arrangement of the twelve contacts, the seventh contact is disposed adjacent to the second contact opposite to the first contact, and the sixth contact is the second contact with respect to the seventh contact. The tenth contact is disposed next to the seventh contact with respect to the sixth contact, and the ninth contact is disposed with respect to the tenth contact. An interchangeable lens, which is disposed next to the side opposite to the sixth contact.   In the interchangeable lens as described in any one of Claims 1-6,
  The driven member is a member that is movable in the optical axis direction of the optical system, a member that is movable so as to include a component in a direction perpendicular to the optical axis direction, or a size of an aperture through which a light beam passes. An interchangeable lens comprising any one of such movable members.   In the interchangeable lens according to any one of claims 1 to 7,
  The interchangeable lens, wherein the plurality of contacts are arranged in a line in an arc shape on the holding portion. In the interchangeable lens according to any one of claim 1 to 7
The interchangeable lens , wherein the plurality of contacts are arranged in a line in a straight line on the holding portion . A detachable interchangeable lens having a driven member, a camera body including a holding portion having a plurality of contacts are arranged,
A first contact for supplying a drive voltage for driving the driven member to the interchangeable lens;
A second contact serving as a ground terminal corresponding to the drive voltage;
A third contact for outputting a first clock signal to the interchangeable lens;
A fourth contact for outputting a first data signal to the interchangeable lens in synchronization with the first clock signal;
A fifth contact for receiving a second data signal from the interchangeable lens in synchronization with the first clock signal;
A sixth contact for outputting a second clock signal to the interchangeable lens;
A seventh contact for receiving a third data signal from the interchangeable lens in synchronization with the second clock signal;
An eighth contact at which a first asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the interchangeable lens;
A ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens;
A tenth contact to which a third asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the interchangeable lens;
Based on the first clock signal output from the third contact and the first asynchronous signal input at the eighth contact, transmission of the first data signal to the interchangeable lens using the fourth contact; In order to receive the second data signal from the interchangeable lens using the fifth contact, the second clock signal output from the sixth contact, the second output from the ninth contact. In order to receive the third data signal from the interchangeable lens using the seventh contact based on the asynchronous signal and the third asynchronous signal input at the tenth contact, an operating voltage is applied to the interchangeable lens. An eleventh contact for supplying
A twelfth contact serving as a ground terminal corresponding to the operating voltage,
Twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion,
The first contact is arranged at one end of the arrangement of the twelve contacts, and the eleventh contact is arranged at the other end of the arrangement,
The second contact is arranged next to the first contact in the arrangement of the twelve contacts.
The camera body according to claim 12, wherein the twelfth contact is arranged next to the eleventh contact in the arrangement of the twelve contacts. A detachable interchangeable lens having a driven member, a camera body including a holding portion having a plurality of contacts are arranged,
A first contact for supplying a drive voltage for driving the driven member to the interchangeable lens;
A second contact serving as a ground terminal corresponding to the drive voltage;
A third contact for outputting a first clock signal to the interchangeable lens;
A fourth contact for outputting a first data signal to the interchangeable lens in synchronization with the first clock signal;
A fifth contact for receiving a second data signal from the interchangeable lens in synchronization with the first clock signal;
A sixth contact for outputting a second clock signal to the interchangeable lens;
A seventh contact for receiving a third data signal from the interchangeable lens in synchronization with the second clock signal;
An eighth contact at which a first asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the interchangeable lens;
A ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens;
A tenth contact to which a third asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the interchangeable lens;
Based on the first clock signal output from the third contact and the first asynchronous signal input at the eighth contact, transmission of the first data signal to the interchangeable lens using the fourth contact; First communication means for receiving the second data signal from the interchangeable lens using the fifth contact;
Based on the second clock signal output from the sixth contact, the second asynchronous signal output from the ninth contact, and the third asynchronous signal input from the tenth contact, the seventh contact is used. Second communication means for receiving the third data signal from the interchangeable lens;
An eleventh contact for supplying an operating voltage different from the drive voltage to the interchangeable lens;
A twelfth contact serving as a ground terminal corresponding to the operating voltage,
Twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion,
The first contact is arranged at one end of the arrangement of the twelve contacts, and the eleventh contact is arranged at the other end of the arrangement,
The second contact is arranged next to the first contact in the arrangement of the twelve contacts.
The camera body according to claim 12, wherein the twelfth contact is arranged next to the eleventh contact in the arrangement of the twelve contacts. A detachable interchangeable lens having a driven member, a camera body including a holding portion having a plurality of contacts are arranged,
A first contact for supplying a drive voltage for driving the driven member to the interchangeable lens;
A second contact serving as a ground terminal corresponding to the drive voltage;
A third contact for outputting a first clock signal to the interchangeable lens;
A fourth contact for outputting a first data signal to the interchangeable lens in synchronization with the first clock signal;
A fifth contact for receiving a second data signal from the interchangeable lens in synchronization with the first clock signal;
A sixth contact for outputting a second clock signal to the interchangeable lens;
A seventh contact for receiving a third data signal from the interchangeable lens in synchronization with the second clock signal;
An eighth contact at which a first asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the interchangeable lens;
A ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens;
A tenth contact to which a third asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the interchangeable lens;
An eleventh contact for supplying an operating voltage different from the drive voltage to the interchangeable lens;
A twelfth contact serving as a ground terminal corresponding to the operating voltage,
Twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion,
The first contact is arranged at one end of the arrangement of the twelve contacts, and the eleventh contact is arranged at the other end of the arrangement,
The second contact is arranged next to the first contact in the arrangement of the twelve contacts.
The camera body according to claim 12, wherein the twelfth contact is arranged next to the eleventh contact in the arrangement of the twelve contacts. The camera body according to any one of claims 10 to 12,
Regarding the arrangement of the 12 contacts,
The third contact is disposed next to the twelfth contact on the opposite side of the eleventh contact, and the fourth contact is disposed on the opposite side of the twelfth contact with respect to the third contact. And the fifth contact is disposed adjacent to the fourth contact on the opposite side of the third contact, and the eighth contact is adjacent to the fifth contact on the opposite side of the fourth contact. And, and
The seventh contact is disposed next to the second contact opposite to the first contact, and the sixth contact is disposed adjacent to the seventh contact opposite to the second contact. The tenth contact is disposed next to the sixth contact opposite to the seventh contact, and the ninth contact is adjacent to the tenth contact opposite to the sixth contact. The camera body is characterized by being arranged in.   The camera body according to any one of claims 10 to 13,
  The camera body according to claim 1, wherein the plurality of contacts are arranged in a line in an arc shape on the holding portion.   The camera body according to any one of claims 10 to 13,
  The camera body according to claim 1, wherein the plurality of contacts are arranged in a line in a straight line on the holding portion. A detachable interchangeable lens having a driven member, an electronic device including a holding portion having a plurality of contacts are arranged,
A first contact for supplying a drive voltage for driving the driven member to the interchangeable lens;
A second contact serving as a ground terminal corresponding to the drive voltage;
A third contact for outputting a first clock signal to the interchangeable lens;
A fourth contact for outputting a first data signal to the interchangeable lens in synchronization with the first clock signal ;
A fifth contact for receiving a second data signal from the interchangeable lens in synchronization with the first clock signal;
A sixth contact for outputting a second clock signal to the interchangeable lens;
A seventh contact for receiving a third data signal from the interchangeable lens in synchronization with the second clock signal;
An eighth contact at which a first asynchronous signal not synchronized with the first clock signal and the second clock signal is input from the interchangeable lens;
A ninth contact for outputting a second asynchronous signal not synchronized with the first clock signal and the second clock signal to the interchangeable lens;
A third asynchronous signal that is not synchronized with the first clock signal and the second clock signal is
A tenth contact input from the interchangeable lens;
Based on the first clock signal output from the third contact and the first asynchronous signal input at the eighth contact, transmission of the first data signal to the interchangeable lens using the fourth contact; In order to receive the second data signal from the interchangeable lens using the fifth contact, the second clock signal output from the sixth contact, the second output from the ninth contact. In order to receive the third data signal from the interchangeable lens using the seventh contact based on the asynchronous signal and the third asynchronous signal input at the tenth contact, an operating voltage is applied to the interchangeable lens. An eleventh contact for supplying
A twelfth contact serving as a ground terminal corresponding to the operating voltage ,
Twelve contacts from the first contact to the twelfth contact are arranged in a line in the holding portion,
The first contact is arranged at one end of the arrangement of the twelve contacts , and the eleventh contact is arranged at the other end of the arrangement,
The second contact is arranged next to the first contact in the arrangement of the twelve contacts .
The twelfth contact, in the arrangement of the twelve contacts, electronic device characterized in that it is positioned next to the first 11 contacts.

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