JPS58195370A - Video camera - Google Patents

Abstract

PURPOSE:To observe a reproduced picture with a light weight view finder itself, by constituting an electronic view finder attachably and detachably from a video camera main body. CONSTITUTION:A command is given to the camera main body 2 in the mode controlling the camera among the operating switch groups 4. Further, the command is given to a VTR 7 via a camera cable 6 from the camera main body 2 in the mode controlling the VTR among the operation switch groups 4. A video signal from the camera main body 2 is given to an EVF 30 via an EVF cable 12 in the operation of a video recording switch 4d and pictured on a cathode ray tube built in the EVF 30 at the same time. On the other hand, in commanding the reproduction modes such as a reproducing switch 4e, a high speed reproducing switch 4g and a reverse reproducing switch 4h, the reproduced picture from the VTR 7 is given to the EVF 30 via the camera cable 6, the camera main body 2, and the EVF cable 12 and the picture is confirmed on the cathode ray tube the same as the case with the video recording.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video camera that converts an optical image into a video signal.

Conventionally, this is a very common device for remotely controlling a video tape recorder (hereinafter referred to as a VTR) using a video camera. command to run or pause;
There is one that uses a so-called start/stop switch. However, recently, some devices have been equipped with multi-mode VTR control functions such as VTfL stop, playback, I￥f special playback speed forward 2-winding, etc. in addition to the above functions, Video cameras that can visually check images using a so-called electronic viewfinder have also come into practical use. Configurations to realize this type of thing include: ■ A device in which the above multi-function operation switch is provided on the video camera body, ■ A similar device is provided in the grip of the video camera, and ■ A remote control device attached to the VTR. Possible options include a structure that allows it to be attached to a video camera.

As a typical example, the above example (2) is shown in FIG.

In the figure, (1) is a lens that is almost integrally attached to the camera body (2), (3) is an electronic View 7 eye/daer that is integrally built into the camera body (2), and (4) is a lens that is attached almost integrally to the camera body (2). is a group of operation switches provided on the side of the camera body (2), (
5) is a grip fixed or attached to the camera body (2), and (6) is a grip that is attached to the camera body (2) and V 'I' R (
7) Camera cable that electrically connects each other, (8)
is a group of VTR operation switches provided in vTfL (7), and (9) is a videotape stored in VTR (7).

Next, the operation will be explained. An optical image of a subject (not shown) captured by the lens (1) is converted into an electrical video signal in the camera body (2), processed, and sent to the v r R (7) via the camera cable (6). At the same time, an optical image captured by the lens or a television image of the video signal is displayed on the electronic viewfinder (3), and can be viewed by a photographer (not shown) by placing his eye on the viewfinder (3).

By operating the operation switch group of the camera body (2) to select the "record" mode λ from (4), the videotape (9) is set to the recording state, and the video head section (Fig. The vehicle starts driving while recording the video signal at (not shown). Next, when the photographer selects and operates the operation switch group (4), for example, the "stop" mode, the VTR (7) is stopped, and the "playback" mode is selected and operated. For example, the VTR (7) is in the playback state, and the playback video signal is output to V through the camera cable (6).
It is sent back from the T R (7) to the electronic viewfinder (3), and the above-mentioned reproduced footage can be viewed on the screen of the electronic viewfinder (3). Further, special reproductions such as speed playback, so-called speed search, and reverse playback can be similarly operated by operating the operation switch.

:By the way, an example of a video camera equipped with a so-called remote control that controls the operating status of a VTR has the above configuration, but the biggest drawback of this device is that it does not record the subject. Even when the user is only using the electronic viewfinder to check the VTR's playback footage, the heavy camera must be held and operated.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and features a structure in which an electronic viewfinder is detachable from the video camera body, and the reproduced video footage can be viewed with this noisy electronic viewfinder alone. The purpose is to provide a video camera with

By equipping the electronic viewfinder with switches that control the operating status of the video camera, such as a zoom control switch, autofocus control switch, etc., you can remotely control the video camera while looking at the detached electronic viewfinder. It can also be expanded to

An embodiment of the present invention will be described below with reference to the drawings. In Figure 2, (4) is the electronic viewfinder (
7) (hereinafter referred to as 1fVF) is a group of operation switches attached to the unit, including a start/stop switch (4a), a focus control switch (4b), a zoom control switch (40), a recording switch (4d), a playback switch (48), It consists of a stop switch (4f), an M-speed regeneration switch (@), a reverse regeneration switch (4h), etc. OG is a stay that is fixed to the camera body (2) and holds the above EvFclll, a is a mounting screw,
(6) is an EvF cable that electrically connects the camera body (2) and EVFgQ, and is inserted into socket 0 provided in the camera body (2). Q◆ is V 1! R(
7) is a socket to which the BVF cable (2) is connected.

The operation in FIG. 2 having the above configuration is almost the same as the conventional example shown in FIG. 1, but the differences from FIG. 1 are as follows.

(2) The EVFW is an electronic viewfinder that is attached to the camera body (2) via a stay Q0 with a mounting screw αυ, and can be detached from the camera body (2) using a mounting screw aη.

■ The above EVF) is electrically connected to the camera body (2) via the EVF cable @ and socket Q4. ■ The operation switch group (4) is integrated with the above EVF), and the EVF ...and can be distributed from the camera body (2).

■VTR (7) is provided with a socket α→.

Therefore, in FIG. 2, the operation switch group (4)
Among them, the mode to control the camera, i.e. start/
Stop switch (4a), focus control switch (4b), zoom control switch (40)
) sends the K command to the camera body (2) via the EVF cable @ and socket 4. In addition, among the operation switch group (4), the mode for controlling the VTR, that is, the recording switch (4d), the playback switch (4B), the stop switch (4f), the high-speed playback switch (4g), and the reverse playback switch (4h). The command is sent via the FiVF cable O'4 and the socket (to) to the camera body 12), and to the V'I'R (7) via the camera cable (6).

Section, ``・1 17・i''(7+(41)O''±,, 1 kidney 1・''8 bodies (
The video signal from 2) passes through EVF Kenipuru (6) and is sent to I
At the same time as it is sent to VF..., it is displayed on the cathode ray tube (not shown) built into EvFcIO, and on the other hand, it commands various playback modes such as playback switch (48), high speed playback switch (@), reverse playback switch (4h), etc. [Also, sometimes the playback video from the VTR (7) is connected to the camera cable (6).
), camera body (2), EV II' cable α4
(via FiYF), and can be viewed on the above-mentioned cathode ray tube in the same way as when recording.

Next, another example of how to use the embodiment of the invention shown in FIG. 2 will be explained with reference to FIGS. 3 and 4. Figure 3 shows an EVFC like the one above! 4 is an explanatory diagram showing an example of a case where the camera body (2) is used separately from the camera body (2). In the figure, (to) is an EVF relay cable whose one end is connected to the FiVF cable @ and the other end is connected to the camera socket (to). As can be easily understood from the figure, the photographer holds the EVFOI at a distance from the camera body (2) by the length of the relay cable (to), and selects it from the operation switch group (4). It can also be used as a device with a so-called remote control function that can control the operating status of a camera or the operating status of a VTR. However, 1. In this embodiment, the operation switch group (4) and the EVFcgJ are integrated, and the photographer can use the camera at a distance from the camera body (2).
It is possible to operate the camera while checking the VF So image, and at the same time to control the VTR and check the video footage being played back from the VTR on the spot. In this case, the camera body (2
) on a tripod (not shown), the photographer only needs to hold the EVF, which is much more compact and lightweight than when holding the camera body (2).
F ■ is completely unrelated to the direction of the camera body (2), and the lens (
The great advantage of 1) is that it allows you to accurately confirm the footage captured, and the photographer has a high degree of freedom.

FIG. 4 shows an example of how the EVFJI is connected to a VTR (7). In other words, EVF (7) is EVF
V via cable (2) and EVF relay cable (to)
It is connected to socket σ◆ provided in TR (7).

This usage allows you to use VTR rather than video cameras.
You can check only the played video. In other words, the conventionally well-known method uses a monitor TV, and the TV and V
'I'R is connected to display the playback video on the television screen, but the drawback of this device is that it cannot be done anytime and anywhere;
This would not have been possible without l'R.

Therefore, televisions are generally 0100V for home use.
Since the power source is , there was a restriction that you could not see it unless you went to a place where such power supply equipment was available (generally indoors).

However, in the l1VF according to the embodiment, the power supply is VTR.
Since the built-in battery can be shared, as long as you have a VTR and an EVF, you can watch playback videos anytime and anywhere, even without a video camera itself.

Moreover, another advantage of the above embodiment is that FiVF has VT
Since it has a built-in operation switch to control R,
The FiVF also has the remote control function of the V'I'R, and therefore can control the VTR while checking the playback from a distance from the VTR.

Note that in the conventional example shown in Figure 1, it is possible to check the VTR's playback image g1 (if the viewfinder is an IIVF), but it is necessary to use a camera body that is significantly larger in size and weight than an EVF alone. While there is the inconvenience of having to hold and operate it, the lightweight FiVF
) You can watch the play Eirin only.

In other words, according to this embodiment, the electronic viewfinder is provided with an operation switch for controlling the video camera and an operation switch for controlling VTfL, and the electronic viewfinder is configured to be attachable to or detachable from the camera body. In addition, since the electronic viewfinder alone can be used to operate the VTR and visually check the played video, the functions of the above-mentioned operation switches provided for remote control can be more effectively utilized, allowing for an even wider variety of uses. can be done.

In the embodiment shown in FIG. 2, the above-mentioned operation switches are the operation switch that controls the camera and the VTR.
y. Uka;i・1 bias, 1- Therefore, regarding 8o, it is often easier to operate when actually shooting by installing it on the camera's grip (5), so if this meaning is important, The above switch may be provided on the grip side, or may be provided in parallel on both the grip side and the EVF, and this does not significantly affect the essence of the present invention.

As described above, according to the present invention, by making the electronic viewfinder removable from the camera body, it is possible to view reproduced images using the lightweight electronic viewfinder alone.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the relationship between a video camera and a VTR incorporating a conventional VTR remote control device, and Fig. 2 (4) shows a remote control device according to an embodiment of the present invention. Video camera and '1
1. With VTR! 21 is a side view showing the main parts of the same embodiment, γ plan view, FIG. 3 is an explanatory diagram showing an example of how to use the same embodiment, and FIG. 4 is based on 1 of the same embodiment. It is an explanatory diagram showing how to use. (2)...Video camera body, (4)...Operation switch, (7)...Video tape recorder,...Electronic viewfinder (EVF). Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno - (1 other person) Condolence figure 1: P3 threshold figure 4

Claims (3)

[Claims] (1) A video camera body connected to a video tape recorder for recording video, and an electronic viewfinder connected to the video camera body and monitoring video from the video camera and the video tape recorder, The electronic viewfinder is a video camera that is detachably attached to the video camera body. (2) The video camera according to claim 1, wherein the electronic viewfinder is equipped with an operation switch for operating the video camera. (3) The video camera according to claim 1 or 2, wherein the electronic viewfinder is equipped with an operation switch for operating the video camera.