JPH02163728A - Camera system - Google Patents

Abstract

PURPOSE:To prevent a short-circuit from being formed due to the metal piece of the power terminal of a camera body by forming a projection part on the electric connection terminal on the camera body side and a cut in the electric connection terminal on an accessory side orthogonally to the direction of contacting between both electric connection terminals. CONSTITUTION:Projection parts 5c and 5d which project in the direction of an optical axis are formed on a camera-side contact base 5. The projection pat 5c projects from camera-side contacts 6a - 6f in the contacting direction at a contacting-directional orthogonal position as an adjacent position closer to the center O-O of the optical axis than the camera-side contacts 6a - 6f. The projection part 5d, on the other hand, projects position as from the contacts 6a - 6f at a contacting-directional orthogonal position as a position which adjoins in a direction around the optical axis from the contacts 6a - 6f. In a lens-side contact base 13, on the other hand, cuts 13c and 13d in the direction of the optical axis are formed at positions corresponding to the projections 5c and 5d when both mounts 2 and 11 are coupled completely. Consequently, even if the metal piece falls in the body by mistake, the contacts 6a and 6f of the camera-side power terminal are prevented from being short-circuited.

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to a camera system in which both a camera body and an optical accessory such as an interchangeable lens are provided with electrical connection terminals for electrical connection. [Prior Art] Camera systems are known in which optical accessories such as interchangeable lenses, intermediate tubes, and various converters can be attached and detached from a camera body using a bayonet mount method. In recent years, camera systems have become increasingly computerized, creating a need for communication and power supply between camera bodies and optical accessories. For this purpose, electrical connection terminals such as contact pins are provided on both mounts, and when both mounts are rotated and attached, the electrical connection terminals on both sides are brought into contact to supply power from the camera body side to the optical accessory side. , reading the ROM contents in the optical accessory;
Alternatively, various camera systems have been proposed that control actuators within a single optical device. Generally, a power source such as a battery is mounted on the camera body, and power is supplied from the camera body side to the optical accessory side. To this end, the camera body is provided with terminals for supplying a ':N source, that is, at least one power level terminal and a ground level terminal. Problems to be Solved by the Invention] The power supply terminal of the camera body is hidden and cannot be touched when an optical accessory is attached to the camera body, but it is exposed when the camera body is alone. Therefore, when using a single camera body, if a metal piece such as a coin is brought close to the terminal, or if a coin or other metal piece is accidentally dropped onto the camera body, both the power level terminal and the ground level terminal There is a possibility that the circuit on the camera body side will be destroyed by contact with An application has been filed for installing a switch to actually supply power to the terminal (Utility Model Application No. 135127/1983). Although this method is safe, it poses a problem in terms of cost. [Solving the Problem] An object of the present invention is to prevent a power supply terminal on the camera body side from coming into contact with a metal piece such as a coin and causing a short circuit. The basic feature is that a protrusion protruding in the contact direction is formed at a position perpendicular to the contact direction of the terminal to protect the power supply terminal on the camera body side. The present invention is characterized in that a notch is formed in the contact direction at a position orthogonal to the contact direction of the connecting terminal, which corresponds to the locus of movement of the protrusion when the two mounts are connected and detached. [Example] Fig. 1 5 shows an embodiment in which the present invention is applied to a video camera system. In the figure, 1 is a video camera body, and 2 is a rotatable bayonet mount fixed to the video camera body 1. This is a camera mount based on this method, and the mount abutment surface 2 serves as a reference in the optical axis direction.
a and three mount claws 2b are formed. 3 is a leaf spring that comes into contact with the mount claw of the lens mount, which will be described later, and brings the mount abutting surfaces of both the camera mount 2 and the lens mount into close contact. 4 is an optical filter, 5 is a camera-side contact base, and 6 is a camera-side contact as an electrical connection terminal movably supported in the optical axis direction o-o', which is the contact direction with respect to the camera-side contact base 5. There are 6 in total, 6a to 6f. 7 is a conductive spring that elastically biases the camera side contacts 6a to 6f in the contact direction;
A total of 6 are installed. Reference numeral 8 designates a printed circuit board that is electrically connected to the camera side contacts 63 to 6f via springs 7a to 7f, and a pattern is formed at a position corresponding to each of the camera side contacts 6a to 6f (springs 7a to 7f). Reference numeral 9 denotes a lock pin, which is connected to the mount abutting surface 2 by an operation member (not shown).
The lens mount can be moved from a protruding position to a recessed position, and can be locked and unlocked when the lens mount is attached. 10 is an interchangeable lens as an optical accessory; 11 is a rotationally detachable bayonet mount type lens mount fixed to the interchangeable lens 10; mount abutting surfaces 1. la and three mounting claws 11
b is formed. 12 is an imaging lens, 13 is a lens-side contact stand, ] 4 is a lens-side contact as an electrical connection terminal fixed (inserted) in the lens-side contact stand 13, and when both mounts 2 and 11 are rotated and installed. A total of six contacts 14a, - contact with the camera side contacts 6a to 6f.
14f is provided. Reference numeral 15 denotes a lock groove into which the lock pin 9 enters when the two mounts (2, 11) are rotated to lock the mount. The center positions of the camera-side contacts 63 to 6f are arranged approximately 90 degrees apart from the lock pin 9 in the direction around the optical axis, while the lens-side contacts 1
The center position of 4a-14f is also shifted from the lock groove by about 90 degrees in the direction around the optical axis. Next, the operation of this embodiment will be explained based on FIGS. 4 and 5. In this embodiment, 6a and 6f are camera side contacts serving as power supply terminals, specifically, camera side contact 6a.
is for ground, and camera side contact 6

[is for high potential. 6b to 6e are camera side contacts related to communication,
Clock line, camera → lens transmission line, lens →
It has a camera transmission line. 14a and 14f are lens side contacts as power supply terminals, and 14b to 1
4e is a contact on the power side related to communication. and,
Only the camera side contact 6f (one side for power supply) has a different height in the contact direction (optical axis direction) from the other camera side contacts 6a to 6e (other side for communication and power supply) by providing a step. That's what I do. In this state, as shown in FIGS. 4(a) and 5(a), which show the state before installation, only the camera side contact 6r is located at the rear ( It is supported at different heights on the image sensor side). Also, only the springs 7a and 7f for urging the camera-side contacts 6a and 6f related to the power source in the contact direction are different from the other springs 7.
The biasing force is set larger than those in b to 7e. These are camera side contacts 6a to 6f and lens side contacts 14a to 14f.
Both contacts 6b to 6e, 14b for communication when in contact with
- Compared to the contact pressure of = 14e, both contacts 6a and 6 for power supply
f, 14a-14F is designed to increase the contact pressure and reduce the contact resistance. For example, if the allowable contact resistance of a power supply contact is 0.1Ω or less, the allowable contact resistance of a communication contact is 1Ω or less. Also, as is clear from the state in the middle of installation shown in FIGS. 4(b) and 5(b), the height of the camera side contact 6 is changed.
The lens side contacts 14a to 14e that do not correspond to the camera side contacts 6 have a protruding height lower than the other camera side contacts 6a to 6e (optical axis (shifted to the front). Further, the lens side contact 14f corresponding to the camera side contact 6f is as follows.
The protrusion height is set higher than the other L-nons side contacts 14a-14e (shifted toward the front side of the optical axis), and it comes into contact with the camera side contact 6f at the end of the mounting rotation of the mount. Note that the camera side contacts 6a to 6e and the lens side contacts 14a to
14e means corresponding contacts 6a and 14a, and contact 6b, respectively.
and 14b, contacts 6C, 1000 contacts 6d and 14d, and contacts 6e and 14e come into contact at the end of the mounting rotation of the mount. To explain the mounting rotation operation of the mount, FIGS. 4(a) and 5(a) show the initial state of mounting, and in this state, the camera side contacts 6a to 6f and the lens side contact 14a
~14f is not in contact with any of them. Then, the interchangeable lens 10 is rotated from the state shown in FIGS. 4(a) and 5(b).
When the lens side contact base 13 is moved in the direction of arrow X to the position shown in b), 1. The camera side contacts 6e and 6d ride on the inclined surface 13a of the lens side contact base 13 and
(a surface at the same height as the contacts 14a-14e). FIG. 4(b) and FIG. 5(b) show the mount in the middle of mounting rotation. FIG. 4(c) and FIG. 5(c) show the completed state of mounting rotation of the mount, and the interchangeable lens 10 is further rotated from the state of FIG. 4(b) and FIG. 5(b). The lens side contact base 13 is moved in the direction of the arrow X. Here, corresponding contact points on the lens side and the camera side are in contact with each other. To explain specifically the process of attaching each contact, the camera side contact 6f does not come into contact (does not slide) with the lens side contacts 14a, -14e in a phase opposite to the lens side contacts 14a, -14e. At the end of the mounting rotation, the lens side contact base 1
3 and comes into contact with the lens side contact 14f. Then, the camera side contact 6e rides on the inclined surface 13a, and the lens side contact 1.4a-1,4d
, and finally comes into contact with the corresponding lens side contact 14e. Similarly, the camera-side contact 6d rides on the inclined surface 13a, slides on the lens-side contact 14a, and then contacts the corresponding lens-side contact 1.4d, and the camera-side contact 6c rides on the inclined surface 13a. Riding over, lens side contact 1
After moving 4a and 14bll, the corresponding lens side contact 1
4c, the camera-side contact 6b rides up the inclined surface 13a, slides on the lens-side contact 14a, and then contacts the corresponding lens-side contact 14b, and then the camera-side contact 6a rides up the inclined surface 13a and responds. It makes contact with the lens side contact 14a. What is important here is that 6a and 6f, which have a higher contact pressure than the others among the camera side contacts, slide with the lens side contact once each when the mount is attached and rotated. While reducing the contact resistance of the contacts related to the power supply, increasing the contact pressure (in other words, reducing the adverse effects caused by other contacts, such as the contact 1 on the lens side)
4 b = l 4 Since sliding with e was eliminated, wear due to sliding could be reduced. Further, since the camera side contacts 6a and 6f related to power supply do not slide with the lens side contacts 6b to 6e related to communication when the mount is attached and rotated, the circuit inside the interchangeable lens 10 is electrically connected. There is no ring formation. Also, camera side contacts 68 to 6f
and lens side contact! By reducing the total number of times of sliding between contacts 4a to 14f (the sum of the number of times of sliding of each contact point), it was possible to reduce the wear of the contacts. Next, the features of this embodiment will be explained. The camera side contact base 5 has a protrusion 5c that protrudes in the optical axis direction.
and 5d are formed. The protrusion 5c is located at a position perpendicular to the contact direction, which is adjacent to the camera-side contacts 6a to 61 on the optical axis center o-o' side, and protrudes in the contact direction (optical axis direction) from the contacts 68 to 6f. It is formed. Further, the protruding portion 5d is formed at a position adjacent to the camera side contacts 6a to 6f in the direction of rotation of the light pongee, and also at a position orthogonal to the contact direction, so as to protrude from the contacts 6a to 6f in the contact direction (optical axis direction). ing. On the other hand, the lens-side contact base 13 has cutouts 13c and 1.3d cut out in the optical axis direction. This notch 13c is located at a position perpendicular to the adjacent contact direction on the optical axis center o-o' side from the lens-side contacts 14a to 14f, and is located at a position perpendicular to the contact direction of the lens side contacts 14a to 14f, and is located at a position perpendicular to the contact direction of the lens-side contacts 14a to 14f. The notch 13d is cut out in the contact direction (optical axis direction) at a position corresponding to the lens side contact 14a-
A cutout is made in the contact direction (optical axis direction) at a position adjacent to the optical axis direction from 14f and perpendicular to the contact direction, and corresponding to the protrusion 5d when both the mounts 2 and 11 are fully connected. , the notches 13c and 13d are formed so that even if the protrusions 5c and 5d are formed on the camera-side contact base 5, they will not hinder the coupling and detachment of both mounts 2.11. The protrusions 5c and 5d can prevent the contacts 6a and 6f, which serve as power supply terminals on the camera side, from short-circuiting.In other words, unlike the conventional protrusions 5c and
In the case without 5d, if a metal piece such as a coin is brought close to the camera side contact, or if the metal piece is accidentally dropped onto the camera body, the contacts 6a and 6f may short-circuit. However, as in this embodiment, the protrusions 5c and 5d serve as walls that act as a guard, and can prevent the contacts 6a and 6f from coming into contact with the metal piece. In this embodiment, the protrusions 5c and 5d are provided in two directions in order to further improve safety, but the short-circuit prevention effect can be obtained even if only one of them is used. Further, the protruding portion 5c is formed over all the camera side contacts 6a to 6f, but this is not true even for the communication contacts 6b to 6f.
Even if it is 6e, it is a contact 6a for power supply. 6f, and if the purpose is simply to prevent a short circuit between only the power contacts 6a and 6f, a protrusion with a length equal to the position of at least one contact 6a or 6f may be formed. You can get the effect just by doing it. Further, in this embodiment, the protrusions 6c, 6d and the step difference can synergistically improve the effect of preventing short circuits between the power supply contacts 6a and 6f. That is, the power supply contact 6a
Since there is a difference in height in the contact direction (optical axis direction) between and 6f due to the step, there will be no short circuit even if a long rod-shaped or plate-shaped metal piece is pressed almost along the end surface of the protrusion 6c. It can be prevented. Furthermore, in this embodiment, the high-potential side power supply contact 6a, which is in contact with the other contacts, is guarded by adjacent protrusions 5c and 5d in two directions to improve safety. , the protruding portion 5d not only in the radial direction but also in the direction around the optical axis is provided only at the advancing side end position in the direction for attaching the interchangeable lens 10 (the direction indicated by X in the figure). Therefore, in the example, the above-mentioned effect is obtained by locating the contact point 6a at the advancing side end in the direction for mounting the interchangeable lens IO.Also, in the example, the protruding portion 5c The formation position of is set closer to the center of the optical axis than the camera side contacts 6a to 6f, but as can be understood from FIG. There is a large space between the contacts 6a and 6a, and there is a possibility that metal pieces such as coins may come close to the
This is because it is higher from the optical axis center side of 6f. Furthermore, in this embodiment, the notches 13c and 13d are formed in the lens side contact base I3 in correspondence with the protrusions 5c and 5d, so the flange back of the camera body 1 itself can be the same as the conventional one, and there is no problem. There is no problem of increasing the size of the camera. In the embodiment, the inclined surface 13b of the lens side contact base 13 has a larger angle of inclination than the other inclined surface 13a, so that the distance between the contacts 14e and 14f and between the contacts 6f and 6e does not widen. . Next, the circuit configuration of the interchangeable lens type camera-integrated VTR- according to this embodiment will be explained based on FIG. In FIG. 6, the camera unit C is on the right side, and the lens unit R is on the left side, with the mount section M indicated by the dotted chain line in the center serving as a border. The light from the subject 101 is formed by the lens optical system 102 on the imaging surface of the imaging device 103. The subject image is photoelectrically converted by the imaging device 103 and output as an imaging signal, and then processed by the camera signal processing circuit 104. converted to television signal. This television signal is used for various automatic adjustments such as an automatic white balance adjustment circuit (hereinafter referred to as AWB circuit) 114, an automatic focus adjustment circuit (hereinafter referred to as AF circuit) 115, and an automatic exposure control circuit (hereinafter referred to as AE circuit) 116. are supplied to the circuit and each adjustment operation is performed. These AWB circuits 114. AF circuit 115. Each control signal is output from various automatic adjustment circuits such as the AE circuit 116 and supplied to each controlled object. A control signal output from the AWB circuit that adjusts the color balance in the camera signal processing circuit is input to the camera signal processing circuit 104,
AF circuit 115. Control signals C1 and C2 output from the AE circuit 116 are input to the camera-side microcomputer 119. Also, a zoom switch 11 for setting the focal length of the optical system.
．． The control signal C3 generated by No. 7 is also input to the camera-side microcomputer 119. These control signals and the like are transmitted as communication data from the camera unit C side to the lens unit R side via a data communication path 126 formed by a group of electrical contacts arranged on the aforementioned mount. The data communication path 126 is connected to the lens side microcomputer 1
20, and all communication data is received by the lens-side microcomputer 120. Each ladder control signal CI, C2, C3 input to the camera side microcomputer 119 is transmitted to the lens side microcomputer 120 via the data communication path 126 (the above-mentioned contacts 6b to 6e, 14b to 14e), and is sent to each control target. It is converted into controlled variables CI', C2', and C3' that are suitable for the following. And each control amount CI', C2',
C3' is the AF driver circuit 127. AE driver circuit 126 is supplied to zoom driver circuit 125 and each actuator 128 . ! 29 and 130 control the optical system 102, respectively. In addition, encoders 1.31. , 1.32. 13
3 is provided. It has an encoder 131 for detecting the focal position, an encoder 132 for detecting the aperture state, and an encoder 133 for detecting focal length information by zoom operation, and each detected information is sent to the lens-side microcomputer 120. Information from these encoders is used for lens-side control, and is also transmitted to the camera-side microcomputer 119 as needed, and used for processing such as AF and AE on the camera side. Next, the operation of the circuit shown in FIG. 6 will be explained using the flowchart shown in FIG. That is, when the power of the camera is turned on (step 1), the camera-side microcomputer 119 confirms that the lens is attached (step 2), and sends a request to send the initial data of the lens via the data communication path 126 (step 2).
3). After that, the lens side will receive various initial data including the lens type (5step 4), and the camera side will:
The above-mentioned various data C1 is stored in the camera side microcomputer.
-C3 etc. are read (step 5), this is parallel-to-serial converted (step 6), and the L/data CTL is transmitted to the lens side (step 7). Also, receive various data LTC including detection information of each encoder from the lens side (step 8), and perform various controls while outputting the encoder data (s
step9). After that, if the lens is attached, check if the camera power is on, and if it is, wait until the l field period has elapsed and return to the step of reading data 01 to C3 (step 5, step 12).
Note that this routine ends when the lens is removed or the camera power is turned off. On the other hand, the lens side receives an initial value request CTL from the camera after attaching the lens (step ').
p2') Then, the initial value of the lens is transmitted as LTC (step 3'). At this time, the initial value is read out from the R, OM, etc. connected to the lens-side microcomputer 119, subjected to parallel-to-serial conversion, and transmitted. Also, each encoder detects the status of the lens! 27゜1
The detected information such as 28 and 129 is read into the lens-side microcomputer (step 4'), and parallel-to-serial conversion is performed (step 5'). Furthermore, after receiving data CTL (step 6'), transmitting data LTC (step 7'), and then 5 steps.
Data Cl- prepared in p4'5tep5'
Various information such as C5 is output (step 8'). Then, if the lens unit is still attached and the camera power is on, wait one field period and read the encoder detection data again (steps 9' and 5).
step10', step11') If the lenses are removed or the camera power is turned off, this routine ends. As described above, various control information is communicated between the camera unit and the lens unit, and each part is thereby controlled. For example, the AF control signal CI' is output to the drive circuit 127. The AF actuator 128 is connected to the drive circuit +
The optical system 102 is controlled according to the output of the
Adjust its position so that it is Also, for example, the AE control signal C2' is the driver 126
Output to. The AE actuator 129 controls the optical system 102 according to the output of the driver 126, and adjusts the aperture value to the optimum value. Also, for example, the zoom control signal C3' is the driver 1
25. And zoom actuator 13
0 controls the optical system 102 according to the output of the driver 125 and adjusts the focal length to the specified focal length. [Modifications of Embodiments] In the embodiments described above, the contact direction of both contacts is set in the optical axis direction, but the same effect can be obtained even if the contact direction is set in a direction perpendicular to the optical axis (radial direction). In the above-described embodiment, a step was formed in the contact direction on both the camera side and the lens side, but the basic effects of the present invention can be obtained even if there is no step, as shown in FIG. . In the embodiments described above, the lens side contacts 14a to 14f are also provided with a step, but by appropriately setting the movable stroke of the camera side contacts 6a to 6f in the contact direction, the lens side contact can be provided with a step. It can be implemented at least. As can be seen in FIGS. 1 and 2, the depth of the notch (in the contact direction) of the lens side contact base 13 in the above-described embodiment is approximately matched to the height of the protrusions 5c and 5d. However, as shown in FIGS. 9 and 10, it is also possible to cut the entire contact direction of the side surface portion (in two directions) of lens side contact block [3], and this structure is also applicable to the present invention. Needless to say, it is included in the notch. [Effects of the Invention] The present invention provides a safe camera system that will not cause a short circuit even if a metal piece such as a coin is brought close to the electrical connection terminal on the camera body side including the power supply terminal. Provides camera bodies and optical accessories.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of a main part of a camera body as an embodiment of the present invention, and FIG. 8 is a mount portion showing a modified example. FIG. 9 is a sectional view of a modified camera body and a state in which an interchangeable lens is attached. FIG. 10 is a diagram showing a modified example of an interchangeable lens viewed from the mount part. Partial view. FIG. 3 is a view of the interchangeable lens in FIG. 1 viewed from the mount. FIGS. 4(a), 4(b), and 4(c) are enlarged cross-sectional views taken along the line A--A of main parts for explaining the mounting rotation of the mount. FIGS. 5(a), 5(b), and 5(c) are enlarged cross-sectional views taken along the line B-B of essential parts for explaining the mounting rotation of the mount. FIG. 6 is a circuit configuration diagram of a camera system as an example. FIG. 7 is a flowchart showing the operation of the circuit of FIG. 6.

Claims (14)

[Claims] (1) A camera body having a camera body side mount, in which a plurality of camera body side electrical connection terminals including a power supply terminal are arranged approximately along the direction around the optical axis, and an optical axis for the camera body side mount. It has an optical accessory side mount that can be connected and detached by rotating around the camera body side, and a power supply terminal is connected to the camera body side electrical connection terminal so that it can come into contact with the camera body side electrical connection terminal when rotating and connecting with the camera body side mount. and an optical accessory such as an interchangeable lens, in which a plurality of accessory-side electrical connection terminals including a plurality of accessory-side electrical connection terminals are arranged substantially along the direction around the optical axis, and the contact direction of the camera body-side electrical connection terminals on the camera body is orthogonal to each other. a protrusion that protrudes from the camera body side electrical connection terminal in the contact direction, and a protrusion that is perpendicular to the contact direction of the accessory side electrical connection terminal of the optical accessory, and that A camera system characterized in that a notch is formed in a contact direction at a position corresponding to the protrusion when the camera is connected and detached. (2) It has an accessory side mount that can be connected and detached by rotating the camera body side mount around the optical axis, and multiple camera body side electrical connection terminals including the power supply terminal are connected approximately in the direction around the optical axis. An optical accessory such as an interchangeable lens that can be attached to a camera body, which is disposed along the camera body and further has a protrusion that protrudes in the contact direction at a position perpendicular to the contact direction of the camera body side electrical connection terminal, a plurality of accessory-side electrical connection terminals including a power supply terminal, which are disposed at a position in contact with the camera body-side electrical connection terminal when the two mounts are rotationally coupled; an optical accessory, characterized in that a notch in the contact direction is formed at a position perpendicular to the contact direction of the connecting terminal and corresponds to the protrusion on the camera body when the two mounts are connected and detached. Goods. (3) A camera body having a camera body side mount, in which a plurality of camera body side electrical connection terminals including a power supply terminal are arranged approximately along the direction around the optical axis, and an optical axis for the camera body side mount. It has an optical accessory side mount that can be connected and detached by rotating around the camera body side, and a power supply terminal is connected to the camera body side electrical connection terminal so that it can come into contact with the camera body side electrical connection terminal when rotating and connecting with the camera body side mount. and an optical accessory such as an interchangeable lens, in which a plurality of accessory-side electrical connection terminals including a plurality of accessory-side electrical connection terminals are arranged substantially along the direction around the optical axis, and at least two of the camera body-side electrical connection terminals in the camera body The power supply terminal is provided with a height difference in the contact direction by forming a step in the contact direction,
Further, a protrusion projecting from the camera body side electrical connection terminal in the contact direction is formed at a position perpendicular to the contact direction of the camera body side electrical connection terminal, and the accessory side electrical connection of the optical accessory is formed. A camera system characterized in that a notch in the contact direction is formed at a position perpendicular to the contact direction of the terminal and corresponding to the protrusion when the two mounts are connected and detached. (4) Connected by rotating the accessory mount around the optical axis.
A camera that has a removable camera body mount and has multiple accessory-side electrical connection terminals, including a power supply terminal, arranged approximately along the optical axis, to which optical accessories such as interchangeable lenses can be attached. The body has a plurality of camera body side electrical connection terminals including a power supply terminal, which are disposed at a position where they come into contact with the accessory side electrical connection terminals when the two mounts are rotationally coupled, and the camera body side electrical connection terminals include a power supply terminal. At least two power supply terminals of the body-side electrical connection terminals are provided with a height difference in the contact direction by forming a step in the contact direction, and further at positions perpendicular to the contact direction of the camera body-side electrical connection terminals, A camera body characterized in that a protrusion is formed that protrudes from the camera body side electrical connection terminal in a contact direction. (5) It has an accessory side mount that can be connected and detached by rotating the camera body side mount around the optical axis, and a plurality of camera body side electrical connection terminals including the power supply terminal are connected approximately in the direction around the optical axis. The at least two power supply terminals are arranged along the camera body side, and a height difference is provided in the contact direction by forming a step in the contact direction of the at least two power supply terminals; In an optical accessory such as an interchangeable lens that can be attached to a camera body that has a protrusion that protrudes in the contact direction, the protrusion is placed in a position that makes contact with the electrical connection terminal on the camera body side when both mounts are rotated and connected. and has a plurality of accessory-side electrical connection terminals including a power supply terminal, and is located at a position orthogonal to the contact direction of the accessory-side electrical connection terminals, and when the two mounts are connected and separated. An optical accessory, characterized in that a notch is formed in a contact direction at a position corresponding to the protrusion in the camera body. (6) By movably supporting the camera body side electrical connection terminal in the contact direction and elastically biasing it in the contact direction, the contact portion is in a protruding state, and the accessory side electrical connection terminal is fixed. The camera system according to claim 1 or 3, wherein the camera system is supported and the contact portion is formed at approximately the same height as the periphery thereof. (7) By movably supporting the camera body-side electrical connection terminal in the contact direction and elastically biasing it in the contact direction, the contact portion is brought into a protruding state, and the accessory-side electrical connection terminal is fixedly supported. The optical accessory according to claim 2 or 5, wherein the optical accessory is supported and the contact portion is formed at approximately the same height as the periphery thereof. (8) Claim (1) wherein the contact direction of both the electrical connection terminals is set in the optical axis direction, and the protrusion on the camera body is formed on the optical axis center side of the camera body side electrical connection terminal. ), (3) or (6). (9) The contact direction of both the electrical connection terminals is set in the optical axis direction, and the protrusion on the camera body is formed on the optical axis center side of the camera body side electrical connection terminal. ), (5) or the optical accessory described in (7). (10) The camera body according to claim 4, wherein the camera body-side electrical connection terminal is movably supported in the contact direction and elastically biased in the contact direction, so that the contact portion is in a protruding state. (11) Claim (4) wherein the contact direction of both the electrical connection terminals is set in the optical axis direction, and the protrusion on the camera body is formed on the optical axis center side of the camera body side electrical connection terminal. ) or the camera body described in (10). (12) Claims (1), (3), (6), or (8), wherein at least two power supply terminals of the camera body side electrical connection terminals are arranged apart from each other at both ends in the direction around the optical axis.
) described camera system. (13) Claims (2), (5), (7), or (9), wherein at least two power supply terminals of the camera body side electrical connection terminals are arranged apart from each other at both ends in the direction around the optical axis.
) Optical accessories listed. (14) The camera body according to claim (4), (10), or (11), wherein at least two power supply terminals in the camera body side electrical connection terminal are disposed apart from each other at both ends in a direction around the optical axis.