KR970004770Y1 - Automatic lens cap for camcorders - Google Patents

Abstract

None.

Description

Lens cover automatic switchgear

1 is a schematic perspective view of a camera integrated video cassette recorder.

2 is an internal block diagram of FIG.

3 is a detailed block diagram of the camera unit shown in FIG.

4 is a schematic block diagram of a detachable camera.

5 is a flowchart showing the operation of the camera-integrated video cassette recorder shown in FIG.

6 is a schematic perspective view of a camera integrated video cassette recorder equipped with an automatic lens cover opening and closing device according to the present invention.

7 is an exploded perspective view showing an automatic lens cover opening and closing device according to the present invention.

8 is a front view showing an operating state of the automatic lens cover opening and closing device according to the present invention.

* Explanation of symbols for main parts of the drawings

1: video cassette recorder body 3: camera

11: broadcast signal receiver 12: demodulator

13 input signal selector 15 camera portion

16: microcomputer 30: condenser microphone

32: lens 40: modulator

50 through hole 52 fixed plate

56: internal gear 58: worm wheel

60: lens cover 62: divided pieces

66: Gear 70: Warham

72: drive motor

The present invention relates to a camera lens cover opening and closing device of a device in which a video camera and a video cassette recorder are integrally combined, and more particularly, a cover is integrally formed with a video cassette recorder so that the cover of the lens is turned on or off according to the power of the camera. Is automatically opened and configured to automatically close when the camera is not in use.

In general, video cassette recorders have been developed in various forms for a long time, and nowadays, the demand is increasing so that it is almost spread to each household and feel like a necessity for modern people.

Most tape cassette recorders currently used for home use mainly 1/2 inch tape cassettes using VHS (Video Home System). Such a tape cassette recorder can be mounted in a home, such as a living room, to record a television broadcast and play it back when necessary.

On the other hand, recently, portable camcorders using the above-described tape cassette recorders have been developed, which also use 1 / 2-inch tapes or 8-mm tapes. Such a portable camcorder shoots a photographer while viewing a subject through a viewfinder, and the photographed subject is recorded on a video tape, so that a user can play it at any time.

However, when shooting a subject using such a portable camcorder, not only the photographer himself can be photographed, but also the person being photographed can produce an inconvenient scene in recognition that the photographer is shooting using the camcorder, There was a defect that could be received. In addition, there is an inconvenience in that an expensive camcorder has to be mounted on a tripod when recording and recording a meeting or the like.

To this end, the applicant has devised a device as shown in FIG. 1, which will be described.

1 is a schematic perspective view showing the appearance of a camera integrated video cassette recorder. As can be seen in FIG. 1, the front panel of the video cassette recorder main body 1 is provided with a door 2 into which a tape cassette (not shown) can be inserted, as in a conventional video cassette recorder. . The tape cassette inserted into this door 2 may be a 1/2 inch VHS cassette or an 8 mm cassette.

The right side of the front panel is equipped with a camera 3 capable of shooting a subject, which is fixed in the video cassette recorder main body 1, but a separate camera is installed in the video cassette recorder main body 1 It may be installed externally. Thus, the camera may be operated remotely.

The front panel is provided with various keys and lamps for controlling the operation of the camera-integrated video cassette recorder. For example, the power button 4A, stop / eject button 4B, jet viewing 4C, display window 4D, recording lock 4E, release button 4F, recording button 4G, TV / VIDEO switch button 4H, a channel select button 4I, a pause lamp 4J, a reproduction lamp 4K, and an adjusting unit 4L provided with a plurality of buttons for adjusting the concrete, bright, and the like.

In the camera-integrated video cassette recorder shown in FIG. 1, since the camera 3 is integrally formed, it is possible to photograph a subject in a natural atmosphere while being mounted on a table at a meeting or consultation or at home. Therefore, even if there is no separate camcorder, the desired purpose can be achieved by attaching only the camera to the video cassette recorder.

2 is an internal block diagram of the camera-integrated video cassette recorder shown in FIG. 1, in which a broadcast signal input through an antenna 10 (including a camera signal from a detachable camera to be described later) is broadcast signal receiver 11. Is applied to. The broadcast signal receiver 11 is configured to tune the input signal and apply it to the demodulator 12.

The demodulator 12 demodulates the signal tuned by the broadcast signal receiver 11 into a video signal and an audio signal, and provides the demodulated signal to the terminal X1 of the input signal selector 13. The input signal selecting section 13 receives a signal input from the external signal input section 14 (which typically includes a video audio jack) through the terminal X2 and processes a signal from the camera 3. The signal of 15 is received through the terminal X3.

Accordingly, the input signal selector 13 selects signals applied to the input terminals X1 to X3 according to the state of the control signals A and B from the microcomputer 16. Here, the input signal selector 13 preferably comprises two multiplexers capable of selecting the video signal and the audio signal by the microcomputer 16.

The signal selected by the input signal selector 13 is input to the automatic gain adjustment amplifier 17, and the input signal level thereof is maintained at a constant signal level by the automatic gain adjustment amplifier 17 to the video signal processing unit 18. Is approved.

The video signal processing unit 18 provides the input video signal and audio signal to the recording unit 19 to cause the recording head 20 to record on a video tape (not shown), or the video through the playback unit 21. The content recorded on the tape is reproduced by the playhead 22 to produce a signal that can be viewed on a television monitor.

The signal processed by the video signal processing unit 18 is applied to the video signal amplifying unit 23 and maintained for reproduction by a television or a monitor, and then converted into a television signal that can be received by a television via the RF converter 24. This will be explained in more detail.

Such a camera-integrated video cassette recorder is capable of selecting three inputs (in some cases, more). That is, a normal broadcast signal (or a video signal and an audio signal modulated at a broadcast frequency) is tuned to a specific frequency signal by the broadcast signal receiver 11 and demodulated by the demodulator 12 and then used as a video signal and an audio signal. It is input to the input terminal X1 of the multiplexer 13.

On the other hand, as the external signal input unit 14, a normal video signal and an audio signal are generally input directly from an A / V device or from a special device that generates the video and audio signals. In addition, the video camera unit 15 applies the image information converted into an electrical signal through the lens and the audio signal input through the condenser microphone 30 (see FIG. 1) to the multiplexer 13.

At this time, the multiplexer 13 selects an input signal according to the control signals A and B of the microcomputer 16 as shown in Table I below.

Table-I (Output Selection for Control Signal)

As can be seen from Table-I above, when the control signal is "AB = LL", the multiplexer 13 selects a broadcast signal. When "AB = LH", the external input signal is selected. When AB = HL ", the camera signal can be selected.

FIG. 3 shows a detailed block diagram of the camera unit 15 shown in FIG. 2, where the audio signal by the condenser microphone 30 is amplified by the microphone amplifier 31 and output as an audio signal. Then, the signal for the subject passing through the camera lens 32 is converted into an electrical signal by the chilling element 33 and then provided to the automatic gain adjuster 34. The automatic gain adjuster 34 performs an operation such as white balance and outputs a video signal of an appropriate level to the video signal processor 35 so that a video signal can be output therefrom.

As can be seen in Figure 3, the camera unit has a built-in power supply 36, the power supply 36 is capable of generating a plurality of voltages, as will be described later The battery 37 is built in case of the additional detachable type. A battery charging unit 38 capable of charging the battery 37 at any time is provided, and a power switching unit 39 for switching the power supply from the battery 37 and the normal power input is provided.

4 is a schematic configuration diagram of a remote camera in which the modulator 40 is built in the camera 3, and a transmission antenna 41 is attached to the camera. This camera is attached to an arbitrary place separately from the camera 3 shown in FIG. 1 so that a video signal and an audio signal can be transmitted to the video cassette recorder main body. Accordingly, such a camera-integrated video cassette recorder may incorporate the camera integrally as shown in FIG. 1, or by installing a separate camera as shown in FIG. The advantage is that the signals captured by the 4 degree discrete camera may be recorded on video tape or monitored as a TV. If several separate cameras are installed, they may be used as surveillance cameras.

5 is a flowchart of controlling the operation of the camera-integrated video cassette recorder. When the user presses an input button, the microcomputer 16 determines which input is currently selected (S1). If the currently selected input is the television mode, the microcomputer 16 advances the program from step S2 to step S3 to apply power to the broadcast signal receiving unit 11.

When it is confirmed that the broadcast signal is input while the power is applied to the broadcast signal receiver or tuner unit 11, the program proceeds from step S4 to step S5, in which case the microcomputer 16 controls the control signal. (A, B) is generated as "AB = LL" to cause the multiplexer 13 to receive a television broadcast signal.

However, when the broadcast signal is not continuously input, the microcomputer 16 advances the program from step S4 to step S6 so that the power of the broadcast signal receiver 11 is turned off. The illustrated device enters the standby mode for the external input (S7).

On the other hand, if the TV mode is not selected as a result of the determination in step S2, the program proceeds to step S8, in which case the microcomputer 16 determines whether the external signal mode is selected.

When the external mode is selected, the program proceeds from step S8 to step S9, and when there is an input of an external signal, the microcomputer 16 returns to the multiplexer 13 with the control signal "AB = LH". To select an external signal (S10). However, if there is no input of the external signal, it enters the standby mode for the external signal (S10).

On the other hand, if a camera mode other than the external signal mode is selected, the program proceeds from step S12 to step S13. In this case, the microcomputer 16 applies power to the camera unit to enable it, and the control signal. Is outputted as "AB = HL" to be provided to the multiplexer 13 (S14). Therefore, the camera unit 15 may be set to the basic mode (S15). Here, the basic mode refers to a mode of operating the camera built in the video cassette recorder.

If the camera is disconnected, the program proceeds from step S16 to step S17, and if the camera is not disconnected, the program proceeds from step S16 to step S18.

Therefore, in the camera mode, it is possible to receive signals from the built-in camera shown in FIG. 1 or the detachable camera shown in FIG.

In FIG. 5, the microcomputer 16 can perform other functions in the standby mode for the external input.

As described above, the camera-integrated video cassette recorder does not recognize that the user is shooting when using a normal video camera (or camcorder), so that a natural atmosphere can be created, and only the camera can be used separately. It can also be used as a phone.

However, in such a camera-integrated video cassette recorder, since the lens is exposed outside, foreign matters such as dust are attached to the lens to obtain a clear image, and there is a risk of damaging the lens by contact or breaking due to external force. Will result.

The object of the present invention is to solve the above problems, and the object of the present invention is to integrate the lens cover with the device so that the lens cover is automatically opened when the camera is in use, and the lens cover is automatically closed when not in use. It is to provide a lens cover automatic opening and closing device to effectively protect the.

A feature of the lens cover automatic opening and closing device according to the present invention for achieving the above object is to record a television broadcast signal on a video tape, and to record a video cassette recorder unit and a subject capable of reproducing the recorded signal to the video tape. A lens cover automatic opening and closing device of a camera-integrated video cassette recorder in which a camera unit capable of recording is integrally formed; A worm wheel having a ring-shaped worm wheel positioned around the through hole of the fixing plate and having an internal gear; A lens cover having a plurality of divided pieces, each of which is installed on the fixing plate so as to be rotatable and has gears engaged with the internal gear of the worm wheel at one edge thereof; And a drive motor installed on the fixed plate and provided with a worm engaged with the worm wheel on the rotating shaft to be forward and reverse when the camera is used and not used.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the automatic lens cover opening and closing device according to the present invention will be described in detail.

FIG. 6 shows a schematic perspective view of a camera-integrated video cassette recorder with a lens cover automatic opening and closing device according to the present invention. In FIG. 6, the same reference numerals as those in FIG. 6 denote the same parts. The detailed description will be omitted, and only the lens cover automatic opening and closing device will be described. However, as can be seen in FIG. 6, the camera 3 is of a type fixed in the video cassette recorder main body 1. As shown in FIG.

7 and 8 show an exploded perspective view and an operating state of the automatic lens cover opening and closing device. In the automatic lens cover opening and closing device according to the present invention, the lens 32 is the camera 3 main body. At the same time it is mounted on the fixing plate 52 through the through-hole 50.

A plurality of fitting holes 54 are formed at equal intervals around the through hole 50. Around the fitting hole 54 of the fixing plate 52, a cover 60 for protecting the lens 32 is positioned on the other side of the ring-shaped worm wheel 58 in which the internal gear 56 is formed. The lid 60 is made up of a combination of at least two divided pieces 62 and each divided piece 62 has a through hole 64 opposed to each fitting hole 54 of the fixing plate 52 on one side thereof. At one side edge including the through hole 64, a gear 66 engaged with the internal gear 56 of the worm wheel 58 is formed to protrude. Each of the divided pieces 62 of the lid 60 is rotatably installed with respect to the fixing plate 52 by a plurality of fixing pins 68 fitted to the fixing plate 52 through the through holes 64.

Here, it is preferable that the divided pieces 62 of the cover 60 have a taiji pattern so as not to interfere with each other, and the worm 70 is engaged with the worm wheel 58 on the rotation shaft on one side of the fixed plate 52. With the use of the camera, the driving motor 72 is installed in the forward and backward driving according to the on / off operation of the power supply, which is fixed by the C-shaped fixing band 74 and the screw 76.

Referring to the operation of the automatic lens cover opening and closing device having such a structure as follows.

First, when power is applied when the camera is used, the driving motor 72 is rotated forward, and the worm 70 of the rotating shaft is rotated, and the worm wheel 58 meshed with the worm 70 is rotated forward.

Accordingly, the worm wheel 58 is rotated in the clockwise direction with respect to each of the fixing pins 68, each of the divided pieces 62 in which the gear 66 in which the worm wheel 58 is engaged with the internal gear 56 is formed. ) Is opened. When the cover 60 is fully opened in this way, a sensor (not shown) detects the cover 60 and provides it to the microcomputer 16 shown in FIG. 2, where the microcomputer 16 detects this and stops driving the motor 72. By doing so, the cover 60 is continuously opened during the use of the camera. On the other hand, when the camera is not used, the microcomputer 16 generates a control signal for rotating the driving motor 72 to provide it to the driving motor. Then, the driving motor 72 is reversely rotated, and the worm wheel 58 meshed with the worm 70 formed on the rotating shaft thereof is reversely rotated. Therefore, each of the divided pieces 62 is rotated backward with respect to the fixing pin 68 by the gear 66 engaged with the internal gear 56 of the worm wheel 58 to close the cover 60.

Thus, according to the lens cover automatic opening and closing device according to the present invention, since the lens cover is integrally formed in the camera portion of the video cassette recorder, the cover is automatically opened only when the camera is in use, according to the power on state. When not in use, the cover is automatically closed, so that foreign matter does not get on the lens, and the lens can be effectively protected from the outside.

Claims (1)

Automatic lens cover opening and closing apparatus of a camera integrated video cassette recorder in which a video cassette recorder unit capable of recording a television broadcast signal on a video tape and reproducing the recorded signal and a camera unit capable of capturing a subject and recording the video signal To; A fixing plate installed in the video cassette recorder main body and having a through hole formed to allow the lens to be viewed; A worm wheel having a ring-shaped worm wheel positioned around the through hole of the fixing plate and having an internal gear; It is installed on the fixing plate so as to be rotatable, and is installed on the lens plate and the fixing plate of a plurality of divided pieces each having a gear that is engaged with the internal gear of the worm wheel on one side edge, and the worm wheel and the Automatic lens cover opening and closing device, which consists of a driving motor that has an interlocking worm and is rotated forward and backward when the camera is used or not.