JPH04368654A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide a magnetic recording and reproducing device with an auto-changing function to perform a protective countermeasure to the misoperation of a user at the time of the selective operation of a tape cassette. CONSTITUTION:A sensor 5 detecting whether a cassette tape is present thereon or not is provided in a space between the rear side of a front panel 2 and the front side of a cassette holder 3. Then a control circuit 6 to control an up-and-down motion of the cassette holder fetches the information from the above-mentioned sensor 5 at the time of the changing of the cassette, and when the presence of the cassette is judged, the control circuit 6 stops the action of the cassette holder regardless of the presence of the signal from a tape selecting switch 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus such as a VTR (video tape recorder) having an autochanger function, and more particularly to a magnetic recording and reproducing apparatus designed to prevent erroneous operation when changing tape cassettes. It is something.

0002

2. Description of the Related Art FIG. 3 is a diagram showing a conventional VTR of this type with an autochanger function. In the figure, a cassette holder 3 having a plurality of cassette storage sections 3a and 3b, each of which can store one tape cassette, is provided on the back side of a front panel 2 in the VTR main body, generally indicated by reference numeral 1. is arranged so that it can be shifted up and down by a drive motor (not shown) or the like. When the cassette insertion slot 4 provided on the front panel 2 and the cassette storage section 3a of the cassette holder 3 are at the same height,
The tape cassette T1 is inserted into the cassette storage section 3a, or the tape cassette T1 is ejected from the cassette storage section 3a to the outside of the VTR main body 1 by an eject mechanism (not shown). Further, when the cassette holder 3 is raised from the position shown in FIG.
The tape cassette T2 is inserted into the tape cassette T2, or the tape cassette T2 is ejected from the cassette storage section 3b to the outside of the VTR main body 1 by an eject mechanism (not shown).

The vertical movement of the cassette holder 3 for inserting and ejecting the tape cassette described above is performed by the user's selection operation, and by specifying an arbitrary cassette storage section, the desired tape cassette can be placed in that cassette storage section. can be inserted. In addition, when an arbitrary tape cassette stored in the cassette holder 3 is selected and recorded/played by the user's operation command, the cassette insertion slot 4 and the cassette storage part in which the selected tape cassette is stored are provided. The cassette holder 3 is moved up and down so that they are at the same height, and the selected tape cassette is conveyed from position A via position B to position C where recording and playback can be performed. There is. Note that when ejecting a tape cassette to the outside of the VTR body 1, by specifying the tape cassette to be ejected, the tape cassette is stored until the cassette storage section in which the tape cassette is stored is at the same height as the cassette insertion slot 4. The cassette holder 3 is moved up and down,
As described above, the tape cassette is ejected to the outside from the cassette insertion slot 4 by an eject mechanism (not shown). Note that as a VTR with a mechanism similar to this type of autochanger mechanism, for example, Japanese Patent Laid-Open No. 63
Examples include those shown in Japanese Patent No.-211155.

0004

[Problems to be Solved by the Invention] However, in the above-mentioned prior art, for example, when the tape cassette is ejected from the VTR main body, the tape cassette is not completely ejected to the outside, and a portion of the tape cassette remains in the cassette storage section. If the user of the VTR selects a tape cassette while the cassette holder is in the If the moving force was strong, there was a problem in that it could damage the tape cassette, cassette holder, and cassette insertion slot on the front panel. Therefore, the technical problem to be solved by the present invention is to solve the above-mentioned problems of the prior art, and its purpose is to provide protection against erroneous operation by the user when selecting a tape cassette. An object of the present invention is to provide a magnetic recording/reproducing device with an autochanger function.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a cassette holder having a plurality of cassette storage sections each capable of storing one tape cassette, and a front panel provided with a cassette insertion slot. By aligning the cassette storage section of the cassette holder with the height position of the cassette insertion slot, the tape cassette can be inserted into the cassette storage section or the tape can be removed from the cassette storage section. In a magnetic recording/reproducing device capable of ejecting a cassette from the device, a safety confirmation sensor detects whether or not a tape cassette is incompletely inserted into the cassette storage portion, and detection information from the safety confirmation sensor is provided. control means for controlling the vertical movement of the cassette holder with reference to the above, and the control means controls the operation of the cassette holder when a signal indicating that the cassette is incompletely inserted is received from the safety confirmation sensor. configured to prohibit.

[0006]

[Operation] For example, a safety confirmation sensor to detect whether a tape cassette exists in the space between the back of the front panel and the front of the cassette holder can be installed on the back of the front panel or the front of the cassette holder. and when a tape cassette is present in the space between the front panel and the cassette holder, a signal indicating that the cassette is incompletely inserted (cassette incompletely ejected) is sent from the safety confirmation sensor. It is output to a control circuit for controlling cassette holder operation. The control circuit prohibits the vertical movement of the cassette holder while a signal indicating the incomplete insertion of the cassette is received from the safety confirmation sensor. By doing so, the cassette holder will not operate even if the user performs a selection operation unless the tape cassette is completely ejected out of the VTR, thus eliminating problems such as malfunctions or damage to the device. Can be done.

[0007]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Figure 1 shows a V with an autochanger function.
This is a diagram showing a schematic configuration of a TR. In the diagram, members and portions that are equivalent to the conventional configuration of FIG. In FIG. 1, reference numeral 5 denotes a safety confirmation sensor (hereinafter referred to as sensor 5), which detects whether or not a tape cassette exists in the space between the back surface of the front panel 2 and the front surface of the cassette holder 3. It is disposed on the back side of the front panel 2 near the cassette insertion slot 4 or on the front side of the cassette holder 3. In this embodiment, this sensor 5 is composed of a reflective or transmissive optical sensor, and detects the presence or absence of a tape cassette in the space between the back surface of the front panel 2 and the front surface of the cassette holder 3. This detection signal is output as an electrical signal (for example, a DC level Hi/Lo signal). Note that the sensor 5 may be a mechanically operated switch or the like, and in short, when a cassette tape is present in the space between the back surface of the front panel 2 and the front surface of the cassette holder 3, a signal indicating "cassette present" is sent to the sensor 5. Any device that outputs a signal indicating "no cassette" when there is no cassette tape is sufficient.

FIG. 2 is a block diagram of the main parts of the control system of this embodiment. In the figure, 5 is the sensor described above, 6 is a control circuit for controlling the vertical shifting operation of the cassette holder 3, 7 is a tape selection switch, 8 is a motor rotation position detection circuit, 9 is a motor for driving a cassette holder, and 10 is a motor drive circuit. Then, the detection information of the sensor 5 is output to the control circuit 6, and thereby the control circuit 6 recognizes whether or not there is a cassette tape in the space between the back surface of the front panel 2 and the front surface of the cassette holder 3. It is supposed to be done.

The tape selection switch 7 is an input means for selecting an arbitrary tape cassette from a plurality of tape cassettes housed in the cassette holder 3, and is provided on the outside of the VTR body 1 or on the remote control. A signal from the tape selection switch 7 is sent to the control circuit 6. Based on this tape selection signal, the control circuit 6 outputs a drive signal to the motor drive circuit 10, thereby driving the motor 9 to shift the cassette holder 3 up and down by a predetermined amount. The motor rotational position detection circuit 8 is for detecting the rotational position of the motor 9, and this output information is also sent to the control circuit 6. That is, since rotational motion can be mechanically converted into linear motion using a gear or the like, the vertical movement distance of the cassette holder 3 can be easily replaced with the rotational position of the motor 9, and the motor rotational position detection circuit By detecting the motor rotational position at 8 and feeding it back to the control circuit 6, the control circuit 6 detects the cassette storage section (3a or 3b) of the cassette holder 3 selected by the user.
is the cassette slot 4 of the front panel 2 and the VTR.
The drive circuit 10 is controlled so that the height is the same as that of the horizontal conveyance section in the main body 1 (section B in FIG. 3 described above). Here, as an example of controlling the position of the cassette holder 3, a method using motor rotation position detection was shown, but a control circuit configuration using a position detection sensor etc. in the cassette holder 3 may also be used, for example. Any means may be used as long as control is possible.

Now, when the information from the sensor 5 mentioned above indicates that there is no cassette, the control circuit 6 performs the operation control as described above to move the cassette holder 3 up and down. On the other hand, if the information from the sensor 5 is that the cassette is present, the control circuit 6 sends a control signal to the drive circuit 10 to stop the operation of the drive circuit 10, regardless of whether there is a signal from the tape selection switch 7. Therefore, the drive circuit 10 does not operate and the cassette holder 3 does not move up and down.

As described above, according to this embodiment, if a cassette tape exists in the space between the back surface of the front panel 2 and the front surface of the cassette holder 3, this is detected and the user Even if you try to switch the tape cassette, the cassette holder will be prohibited from operating.
Problems such as damage to the tape cassette or the cassette insertion portion of the device can be eliminated, and protection against erroneous operation can be provided.

0012

As described above, according to the present invention, when a cassette tape is present in the space between the back surface of the front panel and the front surface of the cassette holder, the user may accidentally select a tape cassette. Even when a switching operation is performed, the device has a protective function of stopping the tape cassette switching operation of the device, so it is possible to eliminate problems such as damage to the device or tape cassette.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a VTR with an autochanger function according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a control system according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a schematic configuration of a conventional VTR having an autochanger function.

[Explanation of symbols]

1 VTR body 2 Front panel 3 Cassette holder 3a, 3b Cassette storage section 4 Cassette insertion slot 5 Safety confirmation sensor (sensor) 6 Control circuit 7 Tape selection switch 8 Motor rotation position detection circuit 9 Motor 10 Motor drive circuit

Claims (4)

[Claims] Claim 1: A cassette holder having a plurality of cassette storage sections each capable of storing one tape cassette is arranged movably up and down on the back side of a front panel provided with a cassette insertion slot, A magnetic recording device in which a tape cassette can be inserted into or ejected from an arbitrary cassette storage portion of the holder to the outside of the device by aligning a desired cassette storage portion of the holder with the height of the cassette insertion slot. In the playback device, a safety confirmation sensor detects whether the tape cassette is incompletely inserted into the cassette storage portion, and vertical movement of the cassette holder is controlled by referring to detection information from the safety confirmation sensor. and a control means, wherein the control means prohibits the operation of the cassette holder when a signal indicating that the cassette is incompletely inserted is received from the safety confirmation sensor. playback device. 2. The safety confirmation sensor according to claim 1, when the tape cassette is present in a space between the back surface of the front panel and the front surface of the cassette holder, the safety confirmation sensor detects whether the tape cassette is in an incompletely inserted state. A magnetic recording/reproducing device characterized by outputting a signal indicating a certain fact. 3. The magnetic recording and reproducing apparatus according to claim 2, wherein the safety confirmation sensor is installed on the back side of the front panel. 4. The magnetic recording and reproducing apparatus according to claim 2, wherein the safety confirmation sensor is installed on the front side of the cassette holder.