JPH0734094B2 - Camera system - Google Patents

Description

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 an electrical connection terminal for electrical connection.

[Prior Art] There is known a camera system in which optical accessories such as an interchangeable lens, an intermediate tube, and various converters are detachably attached to a camera body by a bayonet mount method.

In recent years, with the progress of computerization of camera systems, there is a need for communication and power supply between the camera body and optical accessories. For this reason, electrical connection terminals such as contact pins are arranged on both sides, and when both mounts are rotationally mounted, both electrical connection terminals are brought into contact with each other to supply power from the camera body side to the optical accessory side. Various camera systems have been proposed which read out POM contents in an optical accessory or control an actuator in the optical accessory.

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 power supply, that is, at least a power level terminal and a ground level terminal.

[Problems to be Solved by the Invention] The power supply terminal of a camera body cannot be hidden and touched when an optical accessory is attached to the camera body, but it is exposed when the camera body is used alone. Therefore, when a metal piece such as a coin is brought close to the terminal when the camera body is used alone, or when a metal piece such as a coin is accidentally dropped onto the camera body, both the power level terminal and the ground level terminal are There is a possibility that the circuit on the side of the camera body will be destroyed by touching and causing a short shot.

As an improved proposal of the related art, it has been filed that a switch is provided so that the power supply terminal is actually supplied with power only when the optical accessory is completely attached to the camera body (Actual development Sho 62 -135127). Although this method is safe, it poses a problem in terms of cost.

[Means for Solving the Problems] It is an object of the present invention to prevent a terminal for power supply on the camera body side from contacting a metal piece such as a coin and shooting.

The present invention relates to at least two electrical connection terminals on the camera body side.
The basic feature is that the two power supply terminals are provided with a height difference in the contact direction, and a protrusion protruding in the contact direction is formed at a position orthogonal to the contact direction to guard the power supply terminal on the camera body side. And

Also, the optical accessory shall have a contact-direction notch corresponding to the movement locus of the above-mentioned protrusion when connecting and disconnecting both mounts, at a position orthogonal to the contact direction of the accessory-side electrical connection terminal. Characterize.

〔Example〕

1 to 5 show an embodiment in which the present invention is applied to a video camera system. In the figure, reference numeral 1 is a video camera body, 2 is a camera mount of a rotation removable type bayonet mount system fixed to the video camera body 1, and is a mount abutting surface 2a that serves as a reference in the optical axis direction.
And three mount claws 2b are formed. Reference numeral 3 is a leaf spring that comes into contact with a mounting claw of a lens mount, which will be described later, to bring the mount abutting surfaces of both the camera mount 2 and the lens mount into close contact with each other. Reference numeral 4 is an optical filter, 5 is a camera side contact stand, and 6 is a camera side contact as an electrical connection terminal movably supported in the optical axis direction OO ′ which is a contact direction with the camera side contact stand 5. There are 6 in total, 6a to 6f. Reference numeral 7 denotes a conductive spring that elastically biases the camera side contacts 6a to 6f in the contact direction, and a total of 6 springs 7a to 7f are provided. A printed circuit board 8 is electrically connected to the camera side contacts 6a to 6f via springs 7a to 7f.
A pattern is formed at positions corresponding to (springs 7a to 7f). Reference numeral 9 denotes a lock pin, which can be moved from a position protruding from the mount abutting surface 2a to a retracted position by an operating member (not shown), and enables locking and unlocking when the lens mount is mounted. 10 is an interchangeable lens as an optical accessory,
Reference numeral 11 denotes a lens mount of a rotationally attachable / detachable bayonet mount system fixed to the interchangeable lens 10, and has a mount abutting surface 11a serving as a reference in the optical axis direction and three mount claws 11b. Reference numeral 12 is an image forming lens, 13 is a lens side contact block, and 14 is a lens side contact as an electrical connection terminal fixed (inserted) to the lens side contact block 13. A total of six contacts 14a to 14f are arranged so as to come into contact with the camera side contacts 6a to 6f. Reference numeral 15 is a lock groove, and the lock pin 9 is inserted when the mounts 2 and 11 are rotationally mounted, and serves as a mount lock. The center positions of the camera side contacts 6a to 6f are arranged so as to be offset from the lock pin 9 by about 90 degrees in the optical axis rotation direction, while the center positions of the lens side contacts 14a to 14f are also arranged in the lock groove and the optical axis rotation direction. They are arranged about 90 degrees apart.

Next, the operation of this embodiment will be described with reference to FIGS. 4 and 5.

In this embodiment, 6a and 6f are power supply terminals,
The contacts on the camera side, specifically, the contacts 6a on the camera side are for ground, and the contacts 6f on the camera side are for high potential. 6b ~
6e is a contact point on the camera side related to communication, and has a clock line, a camera → lens transmission line, and a lens → camera transmission line. Reference numerals 14a and 14f are lens side contacts as power supply terminals, and 14b to 14e are lens side contacts related to communication. Then, only the camera side contact 6f (one side for the power supply) has a step different from the other camera side contacts 6a to 6e (the other side for communication and the power supply) and has a height in the contact direction (optical axis direction). To be different. As shown in FIGS. 4 (a) and 5 (a) showing the state before mounting, only the camera side contact 6f is rearward (image pickup) in the optical axis direction OO ′ (see FIG. 1). It is supported by changing the height to the element side). Further, 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 the other springs.
The urging force is set larger than that of 7b to 7e. This is because when the camera side contacts 6a ~ 6f and the lens side contacts 14a ~ 14f are in contact with each other, the power supply contacts 6a, 6f, 14a, 14f are compared with the contact pressures of the communication contacts 6b ~ 6e, 14b ~ 14e. The purpose is to increase the contact pressure and reduce the contact resistance. Generally, by design, the contact resistance for power supply that serves as the power supply for motors and the contact for communication (power supply for communication or IC) are different, for example, the contact resistance for power supply contact is 0.1Ω. If the following is satisfied, the allowable contact resistance of the communication contact is 1Ω or less.

Further, as is apparent from the state of the mounting process shown in FIGS. 4 (b) and 5 (b), the camera side contact 6f is changed to the height.
The lens-side contacts 14a to 14e that do not correspond to the lens-side contacts 14a to 14e have a protrusion height lower than that of the other camera-side contacts 6a to 6e so that they do not slide when the mount is rotated. It is set (shifted to the side). The lens-side contact point 14f corresponding to the camera-side contact point 6f has a protrusion height higher than that of the other lens-side contact points 14a to 14e (shifted to the front side of the optical axis).
The camera side contact is set at the end of the mounting rotation of the mount.
It comes in contact with 6f. In addition, the camera side contact 6a
~ 6e and the lens side contacts 14a ~ 14e are the corresponding contacts 6a
And 14a, contacts 6b and 14b, contacts 6c and 14c, contacts 6d and 14d, and contacts 6e and 14e contact at the end of mounting rotation of the mount.

Explaining the mounting rotation operation of the mount, FIGS. 4 (a) and 5 (b) show the initial mounting state. In this state, the camera side contacts 6a-6f and the lens side contacts 14a-14f are None touched.

Then, from the state shown in FIGS. 4 (a) and 5 (b), the interchangeable lens 10 is rotated to reach the position shown in FIGS. 4 (b) and 5 (b) in the arrow X direction. When the side contact block 13 is moved, the camera side contacts 6e and 6d become the lens side contact block.
Riding on the inclined surface 13a of 13 and contacting the contact table 13 (contact 1
Slide on a surface that is the same height as 4a to 14e). FIGS. 4 (b) and 5 (b) show an intermediate state of mounting and rotation of the mount.

FIGS. 4 (c) and 5 (c) show the completed mounting rotation of the mount, and the interchangeable lens 10 is rotated further from the states of FIGS. 4 (b) and 5 (b). Lens side contact block 13
Is moved in the direction of arrow X. put it here,
Corresponding contact points on the lens side and the camera side are in contact with each other.

The contact process of each contact will be explained in detail.
6f is the contact on the lens side when the phase is opposite to the contacts 14a-14e.
It becomes non-contact (does not slide) with 14a to 14e, and rides on the inclined surface 13b of the lens side contact stand 13 and contacts the lens side contact 14f at the end of the mounting rotation. The camera side contact 6e rides on the inclined surface 13a, slides on the lens side contacts 14a to 14d, and finally contacts the corresponding lens side contact 14e. Similarly, the camera side contact 6d rides on the inclined surface 13a,
Sliding the lens side contacts 14a to 14c and then contacting the corresponding lens side contact 14d, the camera side contact 6c rides on the inclined surface 13a, slides the lens side contacts 14a and 14b, and then the corresponding lens side contact 14c. The camera side contact 6b rides on the inclined surface 13a, slides on the lens side contact 14a, and then contacts the corresponding lens side contact 14b.
It rides on 3a and contacts the corresponding lens side contact 14a.
It is important to note that 6a and 6f, which have higher contact pressure than the other contacts on the camera side, slide once with the corresponding lens side contact when the mount is mounted and rotated. As a result, the contact resistance of the contacts related to the power supply is reduced, while the adverse effect caused by increasing the contact pressure, that is, sliding with other contacts, for example, the lens side contacts 14b to 14e, is eliminated, so that wear due to sliding is caused. Could be reduced. Further, since the camera side contacts 6a and 6f related to the power supply do not slide with the lens side contacts 6b to 6e related to communication when the mount is mounted and rotated, the circuit inside the interchangeable lens 10 is electrically connected. Never destroyed. Also, the camera side contact
It was possible to reduce the wear of the contacts by reducing the total number of slides (total of the number of slides of each contact) between the lenses 6a to 6f and the lens side contacts 14a to 14f.

Next, the features of this embodiment will be described.

The camera side contact stand 5 is formed with protrusions 5c and 5d that protrude in the optical axis direction. This protrusion 5c is the contact 6a on the camera side.
From 6f to 6f at a position orthogonal to the contact direction on the optical axis center OO ′ side, the contact direction from the contacts 6a to 6f (optical axis direction)
Is formed so as to protrude. Further, the protruding portion 5d is formed so as to protrude in the contact direction (optical axis direction) from the contacts 6a to 6f at the same contact direction orthogonal position that is adjacent to the camera side contacts 6a to 6f in the optical axis rotation direction. ing.

On the other hand, the lens side contact base 13 is formed with notches 13c and 13d that are notched in the optical axis direction. The notch 13c is at a position orthogonal to the adjacent contact direction on the optical axis center O-O 'side of the lens side contacts 14a to 14f, and corresponds to the projecting portion 5c when the mounts 2 and 11 are connected and disconnected. Is cut out in the contact direction (optical axis direction). Further, the notch 13d is also a position adjacent to the lens-side contacts 14a to 14f in the direction around the optical axis and orthogonal to the contact direction, and is in the contact direction at a position corresponding to the protruding portion 5d when the mounting of both mounts 2 and 11 is completed. (Notches are formed in the optical axis direction. That is, the notches 13c and 13d do not hinder the coupling and decoupling of the mounts 2 and 11 even if the protrusions 5c and 5d are formed on the camera side contact base 5. It was formed in.

The protrusions 5c and 5d can prevent the contacts 6a and 6f as the power supply terminals on the camera side from being shorted. That is, unlike the conventional one without the protrusions 5c and 5d, a metal piece such as a coin is brought close to the camera side contact,
Alternatively, when the metal piece is accidentally dropped to the camera body, the contacts 6a and 6f may be short-circuited, but the projecting portions 5c and 5d are used as guards as in the present embodiment. It serves as a wall that fulfills the function, and it is possible to prevent contact between both contacts 6a, 6f and the metal piece. In this embodiment, the protrusions 5c and 5d in the two directions are provided in order to enhance the safety, but the effect of preventing shorts can be obtained by only one of them. In addition, the protruding portion 5c has all the camera side contacts 6a to 6f.
It is formed over the entire length of the
Even if it is 6b to 6e, it is designed to prevent accidental contact with the power contacts 6a, 6f, and at least one of the contacts is only required to prevent shorting of the power contacts 6a, 6f only.
The effect can be obtained only by forming the protrusion having a length corresponding to the position of 6a or 6f.

Further, in this embodiment, the projections 6c and 6d and the steps can synergistically improve the effect of preventing shorting between the power contacts 6a and 6f. That is, since a height difference is formed between the power contacts 6a and 6f in the contact direction (optical axis direction) due to the step, a long rod-shaped or plate-shaped metal piece is pressed substantially along the end face of the protrusion 6c. Even if it does, shorts can be prevented.

Further, in this embodiment, the high-potential-side power source contact 6a which is not desired to be in contact with the other is guarded by the adjoining projecting portions 5c and 5d in two directions to enhance safety. The protrusion 5d not only in the radial direction but also in the direction around the optical axis is provided only at the traveling side end position in the direction for mounting the interchangeable lens 10 (the direction indicated by X in the drawing). Therefore, in the present embodiment, the above-mentioned effect is obtained by arranging the contact 6a at the end on the traveling side in the direction for mounting the interchangeable lens 10.

Further, in the embodiment, the formation position of the protruding portion 5c is set to the camera side contact 6a.
It is set closer to the center of the optical axis than ~ 6f, but as you can see in Fig. 1, the camera body 1 has a contact 6a on the camera side.
This is because there is a large space on the optical axis center side of ~ 6f and a metal piece such as a coin may be brought closer to the contact points 6a to 6f from the optical axis center side.

Further, in this embodiment, since the notches 13c and 13d are formed in the lens side contact base 13 corresponding to the protrusions 5c and 5d, the flange back of the camera body 1 itself can be the same as the conventional one. The problem of increasing the size of the camera does not occur.

In the embodiment, the slanted surface 13b of the lens side contact base 13 has a larger slant angle than the other slanted surface 13a, so that the contact 1
The distance between 4e and 14f and the contact points 6f and 6e is prevented from widening.

Next, the circuit configuration of the interchangeable lens type camera integrated VTR according to this embodiment will be described with reference to 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 portion M shown by the one-dot chain line in the center as a boundary.

The light from the subject 101 is transmitted by the lens optical system 102 to the image sensor.
The subject image formed on the image pickup surface of the image pickup device 103 is
Is converted into a television signal by the camera signal processing circuit 104.
This television signal is automatically white balance adjustment circuit (hereinafter referred to as AWB circuit) 114, automatic focus adjustment circuit (hereinafter AF
It is supplied to various automatic adjusting circuits such as a circuit) 115, an automatic exposure control circuit (hereinafter referred to as an AE circuit) 116, and each adjusting operation is performed.

Various control signals are output from various automatic adjustment circuits such as the AWB circuit 114, AF circuit 115, and AE circuit 116, and are supplied to each control target. The control signal output from the AWB circuit that adjusts the color balance in the camera signal processing is input to the camera signal processing circuit 104, and the control signals C1 and C2 output from the AF circuit 115 and the AE circuit 116 are the camera side microcomputer 1
Input to 19.

In addition, the zoom switch 117 that sets the focal length of the optical system
The control signal C3 generated by 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 the data communication path 126 formed by the electrical contact group arranged on the mount.

The data communication path 126 is connected to the lens side microcomputer 120, and all communication data is once received by the lens side microcomputer 120.

Various control signals C1, C2, C3 input to the camera side microcomputer 119 are transmitted to the data communication path 126 (the contacts 6b to 6e,
14b to 14e) via the lens side micro computer 120
Control variables C1 ', C2', C that are transmitted to
Converted to 3 '. Then, the controlled variables C1 ', C2', C3 '
Are supplied to the AF driver circuit 127, the AE driver circuit 126, and the zoom driver circuit 125, and the actuators 128, 129, and 130 respectively control the optical system 102.

Further, the optical system 102 is provided with encoders 131, 132, 133 in order to confirm the operating state of each actuator.

An encoder 131 for detecting a focal position, an encoder 132 for detecting a diaphragm state, and an encoder 133 for detecting focal length information by a zoom operation are provided, and each detection information is
It is sent to the lens side micro computer 120. Information from these encoders is used for lens-side control, and is also transmitted to the camera-side microcomputer 119 as needed to be used for AF, AE, etc. processing on the camera side.

Next, the circuit operation of FIG. 6 will be described with reference to the flow chart of FIG.

That is, when the power of the camera is turned on (step 1), the camera side microcomputer 119 confirms that the lens is mounted (step 2), and transmits a request for transmitting the initial data of the lens via the data communication path 126 (step 3). .

After that, various initial data including the type of lens is received from the lens side (step4), and the camera side reads the above-mentioned various data C1 to C3 and the like into the camera side microcomputer (step5), and the parallel data- Serial conversion (step6)
The data CTL is sent to the lens side (step 7).

Also, various data LTC including detection information of each encoder from the lens side is received (step 8), and various control is performed while outputting the encoder data from it (step 9).
After that, if the lens is attached, it is checked whether the camera power is on. If it is on, the process waits until one field elapses and then returns to the reading step of the data C1 to C3 (step 10, step 12). When the lens is removed or the camera power is turned off, this routine ends.

On the other hand, on the lens side, after mounting the lens (step 1 ') and receiving the initial value request CTL from the camera (step 2'), the initial value of the lens is transmitted as LTC (step 3 '). At this time,
The initial value is read from a ROM or the like connected to the lens side microcomputer 119, subjected to parallel-serial conversion, and transmitted.

In addition, each encoder 127,128,12 that detects the state of the lens
The detection information such as 9 is read into the lens side microcomputer (step 4 ′), and parallel-serial conversion is performed (step
Five').

Further, after receiving the data CTL (step 6 ′), the data LTC (s
tep7 ′), and outputs various information such as data C1 to C3 prepared in step4 ′ and step5 ′ (step
8 '). Then, if the camera power is on with the lens unit still attached, wait one field and read the encoder detection data again (step 9 ',
step10 ′, step11 ′). When the lens is 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, thereby controlling each unit.

For example, the AF control signal C1 ′ is output to the drive circuit 127. A
The F actuator 128 controls the optical system 102 according to the output of the drive circuit 127 and adjusts its position so that a focused state is obtained.

Further, for example, the AE control signal C2 ′ is output to the driver 126. The AE actuator 129 controls the optical system 102 according to the output of the driver 126 to adjust the aperture value to the optimum aperture value.

Further, for example, the zoom control signal C3 ′ is output to the driver 125. Then, the zoom actuator 130 controls the optical system 102 according to the output of the driver 125, and adjusts the focal length as instructed.

[Modification of Example]

In the above-described embodiment, the contact direction of both contacts is the optical axis direction, but the same effect can be obtained even if the contact direction is set to the optical axis orthogonal direction (radial direction).

Although the steps in the contact direction are formed on both the camera side and the lens in the above-mentioned embodiment, the basic effect of the present invention can be obtained even if there is no step as shown in FIG.

In the above-described embodiment, the steps are formed also on the lens side contacts 14a to 14f, but by appropriately setting the movable stroke in the contact direction of the camera side contacts 6a to 6f, it is possible to provide no steps on the lens side contacts. Can be implemented.

The lens side contact base 13 in the above-mentioned embodiment is shown in FIGS.
As you can see in the figure, the depth of the notch (in the contact direction)
Is approximately adjusted to the height of the protrusions 5c and 5d, but as shown in FIGS. 9 and 10, all contact directions of the side surfaces (two directions) of the contact side of the lens side contact base 13 are cut. Needless to say, this structure is also included in the notch of the present invention.

〔The invention's effect〕

According to the present invention, at least two power supply terminals of electrical connection terminals on the camera body side are provided in the camera body in a height difference in the contact direction, and a protrusion protruding in the contact direction is formed at a position orthogonal to the contact direction. For the accessory, it is the position orthogonal to the contact direction of the electrical connection terminal on the accessory side and the connection of both mounts,
By forming a notch in the contact direction at a position corresponding to the protruding portion at the time of detachment, a safe camera system that does not short even if a metal piece such as a coin is brought close to the electrical connection terminal on the camera body side ， Provides camera body and optical accessories.

In addition, the accessory side electrical connection terminal is fixedly supported, and the contact part is formed at almost the same height as the surrounding area, so that the wear of the connection terminal when connecting and disconnecting both mounts can be reduced. it can.

Further, by forming the protruding portion of the camera body on the optical axis side of the camera body side electrical connection terminal, it is possible to make it more difficult to short-circuit at least two power supply terminals with a coin or the like.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a camera body and an interchangeable lens are mounted as an embodiment of the present invention. FIG. 2 is a view of the camera body in FIG. 1 seen from the mount portion. FIG. 3 is a view of the interchangeable lens in FIG. 1 seen from the mount portion. 4 (a), (b) and (c) are enlarged cross-sectional views taken along the line AA of the main part for explaining the mounting rotation of the mount. 5 (a), (b), and (c) are enlarged cross-sectional views taken along the line BB for explaining the mounting rotation of the mount. FIG. 6 is a circuit configuration diagram of a camera system as an embodiment. FIG. 7 is a flow chart showing the operation of the circuit of FIG. FIG. 8 is an enlarged sectional view of a main part of a mount portion showing a modified example. FIG. 9 is a cross-sectional view showing a modified example in which a camera body and an interchangeable lens are mounted. FIG. 10 is a view of an interchangeable lens showing a modified example as seen from the mount portion.

Claims (12)

[Claims] 1. A camera body having a camera body side mount, wherein a plurality of camera body side electrical connection terminals including a power supply terminal are arranged substantially along an optical axis rotation direction, and the camera body side mount. It has an optical accessory side mount that can be connected and disconnected by rotating around the optical axis, and receives power supply so that it can come into contact with the camera body side electrical connection terminal when rotating with the camera body side mount. A plurality of accessory-side electrical connection terminals including terminals and an optical accessory such as an interchangeable lens disposed substantially along the optical axis rotation direction, and at least the camera body-side electrical connection terminal in the camera body. By forming a step in the contact direction between the two power supply terminals, a height difference is provided in the contact direction,
Further, a projecting portion projecting in the contact direction from the camera body side electrical connection terminal is formed at a position orthogonal to the contact direction of the camera body side electrical connection terminal, and the accessory side electrical connection in the optical accessory is formed. A camera system characterized in that a notch in a contact direction is formed at a position orthogonal to the contact direction of the terminal and corresponding to the projecting portion at the time of connecting and disconnecting the both mounts. 2. A camera body side mount that can be connected and disconnected by rotating the accessory side mount about an optical axis,
In a camera body that can be fitted with optical accessories such as interchangeable lenses, in which a plurality of accessory-side electrical connection terminals including power supply terminals are arranged substantially along the optical axis, It has a plurality of camera body side electrical connection terminals including a power supply terminal, which is arranged at a position in contact with the accessory side electrical connection terminals, and at least two power sources of the camera body side electrical connection terminals are provided. The terminals are provided with a height difference in the contact direction by forming a step in the contact direction, and further at a position orthogonal to the contact direction of the camera body side electrical connection terminal in the contact direction from the camera body side electrical connection terminal. A camera body having a protruding portion formed. 3. An accessory side mount which can be connected and disconnected by rotating the camera body side mount about an optical axis,
A plurality of camera body side electrical connection terminals including power supply terminals are arranged substantially along the optical axis rotation direction, and at least two power supply terminals are formed in the contact direction by forming a step in the contact direction. And an optical accessory such as an interchangeable lens that can be attached to a camera body in which a protrusion protruding in the contact direction is formed at a position orthogonal to the contact direction of the camera body side electrical connection terminal. When the mount is pivotally coupled, the mount is arranged at a position in contact with the camera body side electrical connection terminal and has a plurality of accessory side electrical connection terminals including a power supply / reception terminal. A notch in the contact direction is formed at a position orthogonal to the contact direction of the connection terminal and at a position corresponding to the projecting portion of the camera body when the mounts are coupled and separated. Optical accessories to be. 4. 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 and the accessory side electrical connection terminal is fixed. 2. The camera system according to claim 1, wherein the contact portion is formed at substantially the same height as the periphery of the contact portion while supporting the same. 5. The camera body side electrical connection terminal is movably supported in the contact direction, and elastically biased in the contact direction to bring the contact portion into a protruding state and fix the accessory side electrical connection terminal. 5. The optical accessory according to claim 3, wherein the optical accessory is supported at the same time, and the contact portion is formed to have substantially the same height as the periphery thereof. 6. The contact direction of both of the electrical connection terminals is set to the optical axis direction, and the projection of the camera body is formed on the optical axis side of the camera body side electrical connection terminal. The camera system according to 1) or 4). 7. The contact direction of the both electrical connection terminals is set to the optical axis direction, and the projecting portion of the camera body is formed on the optical axis side of the camera body side electrical connection terminal. The optical accessory according to 3) or 5). 8. The camera body according to claim 2, 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. 9. A contact direction of both of the electrical connection terminals is set to an optical axis direction, and the projecting portion of the camera body is formed on an optical axis side of the camera body side electrical connection terminal. The camera body described in 2) or (8). 10. The camera body side electrical connection terminal, wherein at least two power supply terminals are arranged apart from each other at both ends in the optical axis rotation direction, (1), (4) or (6).
The described camera system. 11. A camera body-side electrical connection terminal, wherein at least two power supply terminals are arranged at both ends in a direction around an optical axis so as to be separated from each other.
The listed optical accessories. 12. The camera body-side electrical connection terminal, wherein at least two power supply terminals are arranged at both ends in a direction around the optical axis so as to be separated from each other.
The camera body shown.