JPS63144448A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To remove dew condensation in a short time by a simple method by providing a means releasing a tape formed recording medium wound onto a drum from the drum in response to the sensing of the dew condensation and a means driving a rotary drum in response to the sensing of the dew condensation. CONSTITUTION:Turning on a power switch by an operation section 8, a VTR is in the standby state and a system controller 2 is in the standby state for receiving a loading instruction such as a video recording/reproducing instruction. If the surface of the drum 7 has the dew condensation in this case, a dew condensation sensing sensor 1 gives a high level signal to an input terminal (b) of the system controller 2, the system controller 2 brings the output A to be a high level therewith to use a drum motor drive circuit 3 to drive a drum motor 6 thereby driving the drum 7. When the sensor 1 senses the removal of the dew condensation afterward, the system controller brings the output A to be a low level to stop the drive of the drum 7 and restores the VTR into the standby state. Thus, the dew condensation is removed in a very short time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording or reproducing apparatus provided with a dew condensation detection means for a rotating drum, and more particularly to a dew condensation detection means.

[Prior Art] In a video tape recorder (VTR) equipped with a conventional rotary drum dew condensation detection means, when the dew condensation sensor operates,
If the tape is running with the tape wrapped around the drum, it will stop running the tape and the rotation of the drum, and if the tape is not wrapped around the drum, it will not accept any keys other than the power on/off switch. was prohibited, and the VTR was configured to remain in a stopped state.

[Problem to be solved by the invention] Therefore, in conventional VTRs, the VTR cannot be operated for 30 minutes to 1 hour until the dew condensation disappears, and important photo opportunities are missed. There were many things that happened. Therefore, for example, it may be possible to use a heater or the like to warm up the drum in order to speed up the removal of condensation, but even then, it took about 30 minutes to remove the condensation. Also, the way dew condenses is uneven depending on the air circulation condition within the VTR body, and it may be rough or when the drum surface with condensation is stopped.

If IL occurs on a surface that is difficult to dry, it will take more time to release the condensation sensor, and there will be problems such as difficulty in properly matching the condensation sensor to the actual condensation state.

The present invention has been made to solve these conventional problems, and an object of the present invention is to provide a recording or ef generation device that can eliminate dew condensation on a tram in a short time using an in-cylinder device.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides means for releasing a tape-shaped recording medium from a tram wound around a drum in response to detection of dew condensation; and means for rotating the rotating drum accordingly.

[Function] With the above configuration, during dew condensation, it is possible to eliminate condensation in a short time by simply rotating the drum, and it is also possible to further shorten the condensation time by using the heat generated by rotating the drum. .

[Embodiment] Fig. 1 is a circuit diagram of the main part of a VTR as an embodiment of the present invention provided with dew condensation canceling means, 1 is a sensor for detecting dew condensation, and 2 is a detection output or input of this sensor l. system controller, 3 is a drive circuit for the tram motor, 4 is a drive circuit for the tram motor;
1 is a loading motor drive circuit, 5 is a loading motor, 6 is a tram motor, 7 is a rotary drum around which Si-air tape is wound and rotates with a rotating shaft (not shown), 8 is a VTR operation unit, and 9.11 is a VTR control unit. Switches 10 and 12, which are turned on when unloading and loading are completed, respectively, are resistors.

FIG. 2 is a flowchart for explaining the operation of the system controller in FIG. 1, and the operation related to dew condensation in the VTR of this embodiment will now be explained based on the same figure.

When a power switch (not shown) is turned on by the operation unit 8, the VTR enters a standby state, and the system controller 2 enters a standby state for a loading command such as a recording or playback command. At this time, if there is dew condensation on the surface of the tram 7, the dew condensation detection sensor l supplies a high-level signal to the input terminal of the system controller 2, and accordingly, the system controller 2 sets the output of A to a high level and the tram A tram motor 6 is driven by a motor drive circuit 3 to rotate a drum 7. Thereafter, when the sensor 1 detects that the condensation has disappeared, the system controller 2 sets the output of the A to a low level, stops the rotation of the tram 7, and returns the VTR to the 2-leg standby state.

In the above-mentioned standby state, when a command is issued from the operation unit 8 to instruct recording and loading of 1 Shimano Instruction Kasa,
These data are input to the system controller 2 via the input terminal d, and in response, the system controller 2 sets the A output and C output to high level. As the A output becomes high level, the tram 7 starts rotating,
As the C output becomes high level, the loading motor drive circuit 4 rotates the loading motor 5 in a predetermined direction. As a result, the tape rope ink mechanism (not shown) moves along the tape path in a direction that causes the tape to attach to the outer peripheral surface of the tram 7.

When the tape is completely attached to the outer peripheral surface of the tram 7, the loading completion detection switch 11 is turned on, and a low level signal is input to the input terminal of the system controller 2. Along with this, the system controller 2 returns the C output to the low level, the rotation of the loading motor 5 is stopped, and the VTR becomes ready for recording and playback.

In this state where recording and playback are possible, when a command to instruct unloading, such as a stop command, is issued from the operation unit 8, the system controller 2 sets the B output to a high level. Accordingly, the loading motor drive circuit 4 rotates the loading motor 5 in a direction opposite to the above-described predetermined direction, and the tape is released from the outer peripheral surface of the tram 7. At this time, it goes without saying that one of the pair of tape reels (not shown) performs the tape winding operation. When the tape returns to the state where it is stretched between the pair of tape reels, the unloading completion detection switch 9 is turned on, and a low level signal is input to the input a of the system controller 2. Along with this, the system controller returns the B output to low level and also returns the A output to low level. As a result, both the rope ink motor 5 and the tram 7 stop rotating, and return to the standby state y5 described above.

Now, when the dew condensation detection sensor l detects dew condensation on the surface of the tram 7 in the state where recording and playback is possible, the system controller 2 performs the above-mentioned series of unloading operations and puts the VTR in standby mode. Return to At this time, if the condensation has not been eliminated, the A output is set to high level and the tram 7 is rotated until the condensation is eliminated, as in the case described above.

According to the VTR of the above-mentioned embodiment, when there is dew condensation on the surface of the drum 7, the drum 7 is rotated until the condensation disappears, so the heat generation of the tram 7 and the effects of air flow, etc. Condensation can be removed in a short time. Further, even if dew condensation occurs on any part of the tram 7, since the drum 7 rotates, it does not take time to eliminate the condensation.

In the above embodiment, the tape cassette is a VTR.
Although he did not mention whether it was installed inside the device,
J! Rotates the drum 7 in response to dew condensation detection only when the tape cassette is installed in the VTR! Alternatively, the tram 7 may be configured to rotate in response to detection of dew condensation, regardless of whether a tape cassette is attached to a VTR or not. Further, in a type of VTR that performs tape loading when a tape cassette is attached to the VTR, the drum 7 is configured to rotate if condensation is detected when the tape cassette is not attached to the VTR. In addition, if dew condensation is detected while the tape cassette is being attached, the tape cassette is ejected.

Further, in the two-legged embodiment, the tram 7 is rotated until the condensation is removed, but it is also possible to configure the drum 7 to be rotated for a predetermined period (for example, about 5 minutes) when condensation is detected.

[Effects of the Invention] As explained above, according to the present invention, it is possible to obtain a recording or reproducing device that can eliminate dew condensation in an extremely short time. Furthermore, condensation in one area is evenly removed, and the heat generated by the drum drive further promotes dew formation, allowing the device to return to its operational state in a short period of time.

[Brief explanation of the drawing]

1A is a diagram showing a schematic configuration of a VTR as an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation of the system controller shown in FIG. In the figure. l: Sensor for dew condensation detection 2 System controller 3 Drive circuit for Ni drum motor

Claims (1)

[Claims] In a recording or reproducing apparatus provided with a dew condensation detection means for detecting dew condensation on a rotating drum, means for releasing a tape-shaped recording medium wound around the drum from the drum in response to dew condensation detection by the dew condensation detection means, and the dew condensation detection means. What is claimed is: 1. A recording or reproducing device comprising means for rotating a drum in accordance with the rotation of the drum.