JPH0591383A - Video camera - Google Patents

Abstract

(57) [Summary] [Purpose] Although a non-broadcasting (home) video camera with interchangeable lenses has already been developed by the applicant,
This known video camera has not yet been equipped with a complete preventive function to prevent a lens mounting error.
The present invention provides a video camera having a function of displaying and warning a camera user so that a lens mounting error does not occur. In the camera of the present invention, mounting display means is provided on both the camera body and the interchangeable lens, and when the lens mounting is incomplete, the camera user is warned and informed that the lens mounting is incomplete. Is configured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-replaceable video camera, and more particularly to a lens-replaceable video equipped with a function for preventing a mistake in mounting the video lens and the video camera body. Regarding the camera.

[0002]

2. Description of the Related Art In recent years, interchangeable lens systems have become widespread not only in 35 mm silver halide cameras but also in home video cameras as a means of improving image quality, increasing functionality, and improving operability and performance.

In such a lens-replaceable camera, the information in the viewfinder on the camera side is referred to as a means for confirming the mechanical and electrical connection after the conventional lens is mounted, or an actual autofocus or I had no choice but to check by operating the power zoom.

[0004]

However, in the conventional lens mounting confirmation means, when the lens mounting joint is mechanically incomplete, there is a concern about safety such as lens dropping.
Also, when the lens mounting joint is electrically incomplete,
The timing of shooting and recording may be missed.

Therefore, an object of the present invention is to provide a video camera having a display function for allowing a camera operator to recognize the mounting state so that the video lens can be completely mounted when the video lens is mounted on the video camera body. Is to provide.

[0006]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and is characterized in that a lens or a camera mount lens attachment / detachment position display means and a lens A light emitting element is provided in the mounting display means to enable visual confirmation immediately after lens mounting whether the lens mounting is reliable.After a predetermined time, the lens mounting display device controlled by the timer circuit is turned off as a power saving measure. A red LED is used as the light emitting element as a means for easily performing visual confirmation of the lens mounting, which has a lens mounting display control device capable of saving power. Further, an electric communication abnormality detecting means between the lens and the camera is provided, and when the electric communication is abnormal, the light emitting element is displayed by blinking to warn.

[0007]

According to the present invention, in a video camera with interchangeable lenses, it is possible to confirm the lens device safely and surely by combining the lens mounting display control means with the lens mounting / demounting position display.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings of the interchangeable lens video lens according to the present invention.

FIG. 1 is an external view of a lens of a video camera with interchangeable lenses, FIG. 2 is an external view of a mount of a camera and a lens, and FIG. 3 is a circuit block diagram of a lens-mounted display device.

In FIG. 1, 1 is an interchangeable lens, 2 is a video camera body, 3 is a lens mount, 4 is a camera mount, and 5 is a lens attachment / detachment position alignment display 19 and a lens mounting display 21. In FIG. 2, 6 is an electric contact block in the camera mount, 7 is an electric contact block in the lens mount, and 9 is a camera side lens attachment / detachment position alignment display. In FIG. 3, 8 is a communication line between a camera microcomputer and a lens microcomputer, 10 is a light emitting element, 11 is a lens microcomputer,
Reference numeral 12 is a camera microcomputer, and 15 is a timer circuit.

The interchangeable lens 1 and the video camera main body 2 are configured to be detachable via mounts 3 and 4 on both the lens side and the camera side, and the lens 1 for performing autofocus and power zoom by electric contacts 6 and 7. Among them, a communication line 8 for controlling various actuators is formed. To attach the interchangeable lens 1 to the video camera body, the lens attachment / detachment alignment display 1 displayed on both the lens side and the camera side
The lens mount 3 is rotated and fixedly locked after guiding the mounts 9 and 9 to join the mounts 3 and 4 to each other. At this time, the attachment / detachment position display 5 on the lens side indicates that the mechanical mount connection is completed and the electric connection with the main body of the video camera can be made.
Since it is used in combination with 0, it is possible to visually confirm that the reliable lens mounting is completed immediately after the interchangeable lens 1 is fixed and locked. A red LED is used as the light emitting element 10 so that it can be easily visually confirmed.

Further, in FIG. 3B, a timer circuit 15 is added to the lens mounting display, and the light emitting element 10 displayed when the lens mounting is completed reverses its operation at a preset predetermined time to save power. The circuit block diagram of the lens mounting display device to perform is shown. After the interchangeable lens 1 and the camera 2 are joined and fixedly locked through both mounts 3 and 4, the electric power of the camera battery 27 is applied to the electrical contacts 6 in the mounts 3 and 4,
The current is supplied to the inside of the lens through 7 to be regulated. The regulated potential operates the timer circuit 15, and when the time constant in the timer circuit 15 reaches a preset threshold value, the transistor 28 is turned on, the light emitting element 10 of the lens mounting display 15 is turned on, and the electrical connection is established. Signal completion.

Further, in FIG. 3C, instead of the timer circuit 15, the lens microcomputer 11 controls the lens-mounted display device to perform the same operation as in FIG. 3B. FIG. 4 is a circuit block diagram of a lens-mounted display device that reads initial communication between the lens 1 and the camera 2 from an electric communication line, blinks the light emitting element 10 when communication is abnormal, and also issues an electric abnormality warning. When the regulated voltage is supplied to the lens 1, the lens microcomputer 11 operates, communication between the lens 1 and the camera 2 is started in synchronization with the clock sent from the camera 2, and the communication error bit during the initial communication is set. read. If the communication error bit is not set, the transistor 28 is turned on for a predetermined time to turn on the light emitting element 10 of the lens mounting display 5 to notify that there is no lens mounting error, and the communication error bit is turned on. If so, the transistor 28 is repeatedly turned on and off for a predetermined time, and the light emitting element 10 of the lens mounting display 5 is blinked to display a warning that the lens mounting is abnormal. A flowchart of the lens microcomputer 11 is shown in FIG.

Next, FIG. 4 (a) shows an example in which a red LED as the lens mounting display 21 and the lens attachment / detachment position alignment display 5 are also used on the lens side, and FIGS. 4 (b) and 4 (c) show the same. An example is shown in which the lens attachment / detachment position alignment display 19 is arranged around the red LED as the lens attachment display 21 to facilitate the lens attachment / detachment position alignment.

[Other Embodiments] FIG. 5 shows an example in which a light emitting element 5 serving as a lens mounting display means or also serving as a lens attachment / detachment position display is arranged on the video camera main body side. FIG. 5A is on the side of the video camera, and FIG.
(C) is an example when a light emitting element for lens-mounted display is arranged on the camera mount surface. Reference numeral 17 is a lens removal switch, 21 is a lens attachment display, and 20 is a guide mark of a lens attachment / detachment position alignment display 19.

The description of the operation is the same as that of the above-mentioned embodiment, so that the description thereof will be omitted.

[Brief description of drawings]

FIG. 1 is an external view of a lens of a video camera with interchangeable lenses, which is attached and detached.

FIG. 2 is a diagram showing a camera mount diagram (a) and a lens mount diagram (b).

FIG. 3A is a circuit block diagram of a lens mounting device,
(B) is a circuit block diagram in which a timer circuit is added to the lens mounting device, and (c) is a circuit block diagram in which the lens mounting device is controlled by a microcomputer.

FIG. 4 is an example of a lens-mounted display on the lens side.

FIG. 5 is an example of a lens-mounted display on the camera side.

FIG. 6 is a flowchart of a lens microcomputer.

[Explanation of symbols]

1 ... Interchangeable lens 2 ... Camera body 3 ... Lens mount 4 ... Camera mount 5 ... Lens attachment / detachment position alignment display / lens mounting display 6 ... Camera side electrical contact block 7 ... Lens side electrical contact block 8 ... Telecommunications line 9 ... Camera side Lens attachment / detachment position display 10 ... Light emitting element 11 ... Lens microcomputer 12 ... Camera microcomputer 13 ... Regulator 14 ... Optical system 15 ... Timer circuit 16 ... Camera mount lock mechanism 17 ... Lens removal switch 18 ... Lens mount lock mechanism 19 ... Lens side lens Attachment / detachment position alignment display 20 ... Lens attachment / detachment alignment guide mark 21 ... Lens attachment display 22 ... AF motor 23 ... PZ motor 24 ... Aperture 25 ... Aperture drive circuit 26 ... Motor drive circuit 27 ... Camera battery 28 ... Transistor

Claims (7)

[Claims] 1. A lens-replaceable video camera comprising a combination of a video camera main body and at least one or more video lenses detachably attached to the video camera main body, wherein the video lens and the video camera main body are A mount mechanism for attaching / detaching, and a lens attachment / detachment position alignment display means for guiding the lens attachment / detachment by the mount mechanism,
Lens mounting display means disposed on either the outer surface of the lens barrel or the outer surface of the video camera body for indicating that the video lens is completely mounted on the video camera body by the mounting mechanism; Communication means for communicating between cameras is provided on the video lens and the video camera body, and a light emitting element is used for at least one of the lens attachment / detachment position display means and the lens attachment display means. A video camera with interchangeable lenses. 2. The video camera main body for indicating that the mount mechanism, the lens attachment / detachment position alignment display means, the communication means, and the video lens are completely attached to the video camera main body by the mount mechanism. And a lens mounting means disposed on the outer surface of the lens mounting means, wherein a light emitting element is used in at least one of the lens attachment / detachment position display means and the lens mounting display means. Video camera body. 3. The lens barrel for indicating that the mount mechanism, the lens attachment / detachment position alignment display means, the communication means, and the video lens are completely attached to the video camera body by the mount mechanism. A lens mounting display means disposed on an outer surface, wherein a light emitting element is used in at least one of the lens mounting / demounting display means and the lens mounting display means. 4. The lens-replaceable video camera according to claim 1, wherein the lens attachment / detachment position display means and the lens attachment display means are combined by one light emitting element. 5. The video camera with interchangeable lenses according to claim 1, wherein a red LED is used as the light emitting element. 6. The lens-replaceable video camera according to claim 1, further comprising means for reversing the operation of the lens-mounted display device after a predetermined time has passed after mounting the lens. 7. A means for detecting an abnormality of a lens from initial communication by the communication means, and a means for blinking the light emitting element when the communication abnormality is detected, are provided. The described video camera.