JPH04355212A - Magnetic recording/reproducing device - Google Patents

Abstract

PURPOSE:To find the time to clean a head and the time to replace a drum by issuing an alarm sign based on the comparison between the total time in which a rotary head drum has been in contact with a magnetic tape and the prescribed value of the reproducing output of the drum. CONSTITUTION:While the rotary head drum is in contact with a magnetic tape, a mechanism part 12 performs an output to an summing part 14 and the time is summed up. When the prescribed time is exceeded by the total time, a comparison part 15 directs a display part 16 to display asking a user to clean the head or to replace the rotary head drum. Thus, appropriate display for the head and rotary head drum can be performed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a magnetic recording/reproducing device (
(hereinafter abbreviated as VTR).

0002

[Prior Art] Conventional VTRs do not have a circuit or mechanism to detect dirt or lifespan of the head or rotating head drum, and only detect dirt or lifespan of the head or rotating head drum due to abnormal phenomena such as screen abnormalities during playback. I couldn't recognize it.

[0003] Hereinafter, a description will be given with reference to the drawings. Figure 3
1 shows a block diagram of a conventional VTR. In FIG. 3, 31 is a control section that controls the mechanism, and 32 is a mechanism section that includes a rotating head drum. 33 is a video unit that outputs a video signal based on mechanism information.

The operation of the conventional VTR configured as described above will be explained below. When the VTR is played back, a command from the control section 31 that controls the mechanism is transmitted to the mechanism section 32. The mechanism section 32 rotates a rotary head drum (not shown) in response to a command from the control section 31 . The rotated rotary head drum reads information on the magnetic tape and sends it to the image section 33. The video section 33 outputs information from the rotating head drum to external equipment as a video signal.

[0005]

[Problems to be Solved by the Invention] However, with the above configuration, it is not possible to detect dirt on the head due to magnetic tape when the VTR is used for a long time, and the lifespan of the rotating head drum cannot be detected, resulting in deterioration in the performance of the VTR. However, there were problems such as a shortened lifespan.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a VTR that can indicate when to clean the head and when to replace the rotating head drum.

[0007]

[Means for Solving the Problems] In order to achieve the above objects, the present invention provides a totalizing means for totalizing the time during which the rotating head drum and the magnetic tape are in contact with each other, and an output of the totalizing means exceeding a predetermined value. a comparing means for outputting an output, a display means for triggering an output of the comparing means to issue a warning display, a detecting means for detecting a playback output level of the rotary head drum, and a detecting means for detecting a playback output level of the rotating head drum, the output level of the detecting means being higher than a predetermined value. Comparing means for obtaining an output when the value becomes low; display means for displaying a warning display using the output of the comparison means as a trigger; display storage means for storing the warning display; and display means for selecting data from the display storage means and displaying the data. It is equipped with the following.

[0008]

[Operation] With the above-described structure, the present invention is configured such that when the total amount of time that the rotating head drum is in contact with the magnetic tape exceeds a predetermined value, the playback output level of the rotating head drum is set to a predetermined value. A warning display can be displayed when the value is lower than the value, so you can know when it is time to clean the head.
This allows you to recognize when it is time to replace the rotating head drum.

[0009]

Embodiments (Embodiment 1) An embodiment of the VTR of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the structure of a first embodiment of a VTR according to the present invention. 11 is a control unit that controls the mechanism; 12 is a mechanism unit that includes a rotating head drum; 13 is a video unit that outputs a video signal based on information about the mechanism; and 14 is a cumulative unit that totals the time that the rotating head drum is in contact with the tape. , 15 is a comparator unit that outputs an output when the cumulative unit 14 exceeds a predetermined value; 16
Reference numeral 17 indicates a display section which displays a warning display using the output obtained from the comparison section 15 as a trigger, and 17 indicates a display storage section.

The operation of the first embodiment of the VTR of the present invention constructed as described above will be explained. When the VTR is played, the control unit 11 that controls the mechanism
A command from is transmitted to the mechanism section 12. The mechanism section 12 brings the rotary head drum into contact with the magnetic tape in response to a command from the control section 11, and reads information on the magnetic tape. The read information is sent to the video section 13 and output to external equipment as a video signal.

Further, the mechanism section 12 outputs an output to the accumulating section 14 while the rotating head drum and the magnetic tape are in contact with each other according to a command from the control section 11. The accumulating section 14 accumulates time while receiving input from the mechanism section 12. The accumulated time in the accumulator 14 is always sent to the comparator 15 while the time is being accumulated. The comparison section 15 compares the cumulative time with a predetermined value, and outputs an output to the display section 16 when the cumulative time exceeds the predetermined value.

The predetermined values refer to the head cleaning period and the rotating head drum replacement period.The head cleaning period is every 100 hours, and the rotating head drum is every 100 hours.
It can be set to 0 hours, etc.

The display section 16 displays 10
If it is 0 hours, a display prompting you to clean the head will be displayed, and 1000 hours will be displayed.
If the time has come, a message can be displayed prompting the rotating head drum to be replaced. The display unit 16 may be a light emitting diode, a liquid crystal display panel, a fluorescent display tube, or the like. The display storage section 17 also stores messages and the like, and the display section 16 receives the output from the comparison section 15 from the display storage section 17.
Data can be selected and displayed. When providing the display storage section 17, it is necessary to prepare display means capable of displaying messages and the like.

As described above, according to the first embodiment, when the output of the accumulating means for accumulating the time during which the rotating head drum and the tape are in contact exceeds a predetermined value, a warning message is displayed on the display means. The head and rotating head drum can be taken out and appropriate measures taken.

(Embodiment 2) FIG. 2 is a block diagram showing the configuration of a second embodiment of the VTR of the present invention. 21 is a control unit that controls the mechanism; 22 is a mechanism unit; 23 is a video unit that outputs a video signal based on information about the mechanism; 24 is a detection unit that detects the playback output level of the rotating head drum; 25 is a detection unit 2
A comparison section 4 provides an output when the output level becomes lower than a predetermined value, a display section 26 displays a warning display triggered by the output obtained from the comparison section 25, and a display storage section 27.

The operation of the second embodiment of the VTR of the present invention constructed as described above will be explained. When the VTR is played, the control unit 21 that controls the mechanism
A command from is transmitted to the mechanism section 22. The mechanism section 22 brings the rotating head drum into contact with the magnetic tape in response to a command from the control section 21, and reads information on the magnetic tape. The read information is sent to the video section 23 and output to external equipment as a video signal.

Further, the output of the rotary head drum of the mechanism section 22 is input to the detection section 24 while the VTR is being played back. The detection section 24 detects the reproduction output level from the input output of the rotary head drum and sends it to the comparison section 25 . The comparison section 25 compares the playback output level with a predetermined value, and outputs an output to the display section 26 if the playback output level is lower than the predetermined value.

[0019] The predetermined value is a playback output level at which the image can be viewed without any trouble when playing back a VTR and projecting an image on a TV, etc., and the number of playback output levels detected by the detection unit 24. Set the level to low.

The display unit 26 displays a message urging head cleaning if the playback output level is several levels lower than the output from the comparison unit 25, and if the playback output level does not recover even after head cleaning or if the playback output level has significantly decreased. If this happens, it is determined that the head has reached the end of its lifespan, and a display can be displayed to prompt the user to replace the rotating head drum. The display unit 16 may be a light emitting diode, a liquid crystal display panel, a fluorescent display tube, or the like. The display storage section 27 also stores messages and the like, and the display section 26 can select data from the display storage section 27 based on the output of the comparison section 25 and display it. When providing the display storage section 27, it is necessary to prepare display means capable of displaying messages and the like.

As described above, according to this embodiment, if the output of the detection means for detecting the reproduction output level of the rotating head drum is lower than a predetermined value, a warning message is displayed on the display means, and the head, Appropriate measures can be taken on the rotating head drum.

[0022]

As is clear from the above embodiments, the present invention includes a totalizing means for totalizing the time during which the rotating head drum and the magnetic tape are in contact with each other, and an output when the output of the totalizing means exceeds a predetermined value. a detection means for detecting the playback output level of the rotary head drum; a comparison means for obtaining an output when the output level of the detection means is lower than a predetermined value; and a trigger for the output obtained from the comparison means. Since the present invention is equipped with a display means for issuing a warning display when the head is cleaned, it is possible to provide a VTR that allows the user to recognize when it is time to clean the head and when to replace the rotary head drum.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a VTR in a first embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a VTR in a second embodiment of the present invention.

[Figure 3] Block diagram showing the configuration of a conventional VTR

[Explanation of symbols]

11 Control section 12 Mechanism part 13 Video department 14 Cumulative section 15 Comparison section 16 Display section 17 Display storage section 21 Control section 22 Mechanism part 23 Video Department 24 Detection section 25 Comparison section 26 Display section 27 Display storage section

Claims (3)

[Claims] 1. A magnetic recording and reproducing apparatus for recording video signals and audio signals on a magnetic tape using a rotating head drum, comprising: a totalizing means for accumulating the time during which the rotating head drum and the magnetic tape are in contact; A magnetic recording and reproducing apparatus comprising: a comparison means that outputs an output when the output of the accumulation means exceeds a predetermined value; and a display means that issues a warning display triggered by the output obtained from the comparison means. 2. A magnetic recording and reproducing apparatus for recording video signals and audio signals on a magnetic tape using a rotating head drum, comprising: a detection means for detecting a reproduction output level of the rotary head drum; and an output of the detection means. 1. A magnetic recording and reproducing apparatus comprising: a comparison means that produces an output when the level becomes lower than a predetermined value; and a display means that issues a warning display triggered by the output obtained from the comparison means. 3. The magnetic recording device according to claim 1, further comprising a display storage means for storing a warning display, and a display means for selecting data from the display storage means and displaying the data. playback device.