JPH10340507A - Magnetic recording / reproducing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] Since a thing other than a predetermined cassette tape (a toy, food, etc.) can be easily inserted into a tape recorder main body from a cassette insertion slot due to mischief of children or the like. The tape recorder breaks down due to the cause. SOLUTION: Sensors 28 and 29 are provided at both ends of an opening / closing door 3 provided at one end of an opening 2, and even if an attempt is made to open the opening / closing door 3 as long as the sensors 28 and 29 do not react at the same time, the opening and closing of the door 3 When the door 3 hits the slide plate 13 set on the side, the door 3 cannot be opened. Accordingly, if the sensors 28 and 29 can react simultaneously like a predetermined cassette tape and have a size smaller than the opening 2, when the sensors 28 and 29 are to be inserted, both sensors 28 and 29 are used. When the slide plate 13 operates and moves in the direction opposite to the direction of the arrow D, the door 3 can be opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for locking an opening / closing door of a magnetic recording / reproducing apparatus, and more particularly to a video tape recorder (hereinafter referred to as V) of a front loading system.
TR).

[0002]

2. Description of the Related Art FIGS.
It is a longitudinal cross-sectional view about the side of R. These FIGS. 17-2
In 2, 1 is a VTR main body, 7 is a front panel, 2 is an opening having an opening / closing door 3 provided at one end thereof, and 4 is an opening / closing door 3.
Reference numeral 5 denotes a cassette tape, reference numeral 6 denotes a cassette holder for holding the cassette tape 5, and reference numeral 32 denotes a shaft provided on the rotating plate 31.

[0005] Next, the operation of inserting and ejecting a cassette tape of a VTR will be described. In VTR, VT
In order to effectively use the space on the upper surface of the R, a method called a so-called front loading method, that is, a method of inserting a cassette tape from the front of the VTR and mounting the cassette tape in the VTR is adopted. This front loading method will be briefly described.

As shown in FIG. 17, the opening / closing door 3 closes the opening 2 with respect to the shaft 4 supported on the upper end side as one end side of the opening 2 with respect to the front panel 7. It is provided rotatably between positions A ′ where the opening 2 is opened, and is attached in a closing direction by a spring (not shown) provided around the shaft 4 as shown by an arrow B in FIG. It is being rushed.

Next, as shown in FIG. 18, the cassette tape 5 is inserted by pushing the opening / closing door 3 through the opening 2 and the cassette holder 6 holds the tape 5 automatically. Move the cassette tape 5 to VTR
After the cassette tape 5 is pulled into the main body 1 and the cassette tape 5 is mounted on the VTR main body 1 as shown in FIG. 19, the opening / closing door 3 returns to a closed state in which the opening 2 is closed by a spring provided around the shaft 4. .

Thereafter, when taking out the cassette tape 5, the opening / closing door 3 is again opened and the cassette tape 5 is opened.
Is allowed to be discharged from the VTR main body 1.

Next, a description will be given of a conventional technique in which the opening / closing door 3 cannot be opened when the cassette tape 5 is inserted into the VTR main body 1. 17, the spring (not shown) provided around the shaft 32 causes the cassette holder 6 to move in the direction of arrow I.
In the structure shown in FIG. 20 in which a rotating plate 31 urged against the lower surface of the
, Open the door 3 and insert the cassette tape 5,
When the tape 5 is held by the cassette holder 6, the cassette holder 6 automatically moves (see arrow J in FIG. 21). When the cassette tape 5 is drawn into the VTR main body 1 by this movement, the rotary plate 31 rotates in the direction of arrow I ′ shown in FIG. 21 and the cassette tape 5 is moved in the direction of arrow I as shown in FIG. It is urged with the lower end face as a hit. In this state, if the user tries to open the door 3, the door 3 hits the end face K of the rotating plate 31, so that the door 3 cannot be opened. Then, when taking out the cassette tape 5, when the cassette holder 6 moves in the direction opposite to the arrow J shown in FIG. 21, the rotating plate 31 rotates in the direction of the arrow I, as shown in FIG. The cassette holder 6 is urged against the lower surface thereof.

[0008]

Since the conventional VTR is constructed as described above, foreign objects other than a predetermined cassette tape, such as toys and foods, are removed by the mischief of children, etc. Except that the VTR is easily inserted into the VTR main body through the cassette insertion slot. For this reason, there is a problem that the VTR does not operate due to this.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to be applied to a magnetic recording medium such as a cassette tape mounted inside a magnetic recording / reproducing apparatus such as a VTR body. It is another object of the present invention to prevent a magnetic recording medium other than a predetermined magnetic recording medium from being inserted into the apparatus main body through the insertion opening.

[0010]

According to a first aspect of the present invention, there is provided a front panel, an opening provided in the front panel for inserting and ejecting a magnetic recording medium, and one end of the opening. An opening / closing door rotatably supported around a part of the panel as a fulcrum and urged in a direction to close the opening, wherein a predetermined physical action is applied to the magnetic recording / reproducing device. Unless given, the opening / closing door keeps being kept urged in the direction to close the opening to prevent insertion of the magnetic recording medium.

According to a second aspect of the present invention, in the magnetic recording / reproducing apparatus according to the first aspect, the state of the opening / closing door is changed in a direction in which the opening is closed unless a predetermined unlock signal is given as the physical action. And a lock maintaining means for preventing the magnetic recording medium from being inserted while maintaining the biased state.

According to a third aspect of the present invention, in the magnetic recording / reproducing apparatus according to the second aspect, a lock command signal generating means for generating a lock command signal and an unlock signal generating means for generating the unlock signal are further provided. The lock maintaining means mechanically locks the state of the door in response to the lock command signal in a state where it is urged in a direction to close the opening, and receives the lock release signal. And releasing the locked state of the opening so that the magnetic recording medium can be inserted.

According to a fourth aspect of the present invention, in the magnetic recording / reproducing apparatus according to the third aspect, the lock release signal generating means is provided on the opening / closing door and has a size equal to or larger than the size of the magnetic recording medium and Sensor means for detecting only the presence of an object smaller than the size corresponding to the opening, generating the lock release signal in response to the detection signal of the sensor means, and outputting the signal to the lock maintaining means. .

According to a fifth aspect of the present invention, in the magnetic recording / reproducing apparatus according to the third aspect, the lock command signal generating means and the lock release signal generating means are configured to control the lock command signal and the lock release signal in accordance with a predetermined operation. A lock release signal is generated.

The invention according to claim 6 is the invention according to claim 4 or 5.
In the magnetic recording / reproducing apparatus described above, the unlock signal generating means further includes a discharge signal generating means for generating a discharge signal for instructing discharge of the magnetic recording medium in accordance with an operation for discharging the magnetic recording medium. The lock release signal is generated in response to the discharge signal and output to the lock maintaining means.

According to a seventh aspect of the present invention, in the magnetic recording / reproducing apparatus according to the third aspect, the lock command signal generating means and the unlocking signal generating means respectively include a power-off state and a power-on state of the magnetic recording / reproducing apparatus. The lock command signal and the lock release signal are generated only in the state.

According to an eighth aspect of the present invention, in the magnetic recording / reproducing apparatus according to the second aspect, at least the opening is urged in a direction to close the opening.
A front door rotatably disposed at a part of the front panel at a front part of the front panel, a lock command signal generating means for generating a lock command signal, and a lock release for generating the lock release signal Signal generation means,
The lock maintaining means receives the lock command signal and mechanically locks the front door so as to cover the opening.
When the lock release signal is received, the locked state of the front door is released so that the magnetic recording medium can be inserted.

According to a ninth aspect of the present invention, in the magnetic recording / reproducing apparatus according to the first aspect, when a first mechanical action is given by a predetermined device, the state of the opening / closing door is closed to close the opening. Mechanically locked in a state of being biased in the direction to prevent insertion of the magnetic recording medium, and when the second mechanical action by the predetermined instrument is given as the physical action, the opening / closing door And a lock maintaining means for releasing the locked state and enabling insertion of the magnetic recording medium.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The magnetic recording / reproducing apparatus according to the present invention is characterized in that a lock maintaining means mechanically maintains a state where an opening / closing door is always urged in a direction to close an opening. In this state, the magnetic recording medium cannot be inserted from the opening, and only when a predetermined physical action is applied to the lock maintaining means, the bias maintaining state or the locked state of the door is released to release the magnetic recording medium. Can be inserted and ejected from the opening. In particular, the "predetermined physical action" is roughly classified into (A) a case in which locking and unlocking is performed by an electric signal and (B) a case in which all are performed by a mechanical action. Among them, the above (A)
Embodiments 1 to 5 include embodiments included in the following types:
The type included in the type (B) is the sixth embodiment.

Hereinafter, the present invention will be described in detail with reference to the drawings showing each embodiment of a VTR which is a typical example of a magnetic recording / reproducing apparatus.

(Embodiment 1) Here, when the power is turned off, the opening / closing door of the VTR body is always locked in a mechanically biased state, and the lock is performed only when the power is turned on. Is to be canceled. Therefore, the detection signal that gives the power-off state is the source of the “predetermined lock release signal”.

FIG. 1 is a perspective view showing the external structure of the magnetic recording / reproducing apparatus. In FIG. 1, 1 is a VTR body, 7
Reference numeral 2 denotes an opening provided on the front panel 7 and an opening for inserting and ejecting a magnetic recording medium (here, a video cassette tape). Reference numeral 8 denotes a power button, 14 denotes an operation button, and 30 denotes a discharge button used when discharging a video tape. A power button 10 and an operation button 15 having the same functions as the power button 8 and the operation button 14, respectively, are provided on the remote control device 9.

Here, as shown in FIG. 17, the opening / closing door 3 is attached to the front panel 7 and the shaft 4 supported on the upper end of the rear surface of the front panel 7 as one end of the opening 2. Is pivotally provided between a position A that closes the opening 2 and a position A ′ that opens the opening 2 with the fulcrum as a fulcrum. Arrows are provided by springs (not shown) provided around the shaft 4. As shown by B, it is urged in a direction to close the opening 2.

Next, when inserting the cassette tape 5 shown in FIG. 17 into the VTR main body 1, the power button 8 of the VTR main body 1 shown in FIG. 1 or the attached remote control device 9 (hereinafter referred to as a remote control) The user operates the power button 10) to put the VTR main body 1 in a power-on state, pushes the open / close door 3 through the opening 2, and inserts the cassette tape 5.

In the VTR having the above-described structure, when the power button 8 of the VTR main body 1 or the power button 10 of the attached remote controller 9 is operated to turn off the power of the VTR main body 1, a part of FIG. Driving means 11 shown in side sectional view
However, the gear 12 is rotated in the direction of the arrow C (first direction) by the internal mechanism of the VTR main body 1 (see FIG. 4 described later). As a result, the slide plate 13 disposed below the door 3 and engaged with the gear 12 is moved upward from the position below the other end of the opening 2 in the direction indicated by the arrow D, and is a side sectional view of FIG. Is set immediately behind the door 3 as shown in FIG. This state is a locked state of the door 3, that is,
This corresponds to a state in which the door 3 is kept urged in the direction to close the opening 2.

One end of the driving means or the rotating shaft 11 is joined to a motor 52 shown in FIG.

The internal mechanism described above is as illustrated in FIG. That is, when a detection signal V8 or V8 'for giving a power-off state is input to the controller 50 from the power button 8 or the power button 10 of the remote controller 9, the controller 50 generates a lock command signal V51, and the driver 51 drives it. The signal is converted into a signal V52 and given to the motor 52. In response, the motor 52 drives the driving unit 11 to rotate in the C direction.

In the state shown in FIG. 3, the opening / closing door 3 cannot be opened anymore, so that a thing other than a predetermined cassette tape, such as a toy or food, is removed from the VTR through the opening 2 due to children's mischief. Insertion into the main body 1 can be easily prevented.

Conversely, when unlocking the door 3, the power button 8 or 10 may be operated to turn on the power. At this time, the signal V8 or V8 'in FIG.
Generates and outputs a lock release signal V51, and the motor 52 receives the lock release signal V51 and rotates the driving unit 11 in the C ′ direction (second direction). As a result, the slide plate 13 slides in the direction D ′ (downward) to release the lock of the door 3.

As can be understood from the above description, here, the controller 50 and the driver 51
10 together with "lock command signal generation means" and "lock release signal generation means".
1, 12, and 13 form "lock maintaining means".

As described above, according to the first embodiment of the present invention,
In a magnetic recording / reproducing apparatus having an opening through which a cassette tape is inserted and ejected, and an opening / closing door rotatably supported by one end of the opening as a fulcrum and urged in a closing direction, When the door is off, the door cannot be opened at all times.
When the power is turned off, it becomes impossible to insert anything other than the predetermined cassette tape into the apparatus main body through the opening.

(Embodiment 2) Embodiment 2 will be described with reference to FIGS. 1 to 3 as appropriate.

Here, first, as shown in FIG.
When some predetermined operation buttons are operated (predetermined operation) among the operation buttons 14 provided on the R main body 1 or the operation buttons 15 provided on the remote controller 9, the core of the internal mechanism shown in FIG. The barrel controller 50A responds to the operation command signal V14 or V14 ′ output from the button,
A lock command signal V51 for driving the motor 52 to lock the door 3 is generated and output. Thereby, the motor 52 is driven, and the driving means 11 connected to the motor 52 rotates the gear 12 in the direction of the arrow C (first direction) as shown in FIG. As a result, the slide plate 13 is moved upward as indicated by the arrow D, and is set at a position behind the door 3 shown in FIG. Thereby, the door 3
Is kept in the locked state in the above-mentioned meaning.

Conversely, when releasing the locked state,
By operating some of the operation buttons 14 or 15 (unlock operation), the controller 50A receives the operation command signal V14 (V14 ') in FIG. It generates a signal V51 and outputs the signal V52 to the motor 52 via the driver 51. As a result, the motor 52 is driven and the motor 5
The drive means 11 connected to 2 rotates the gear 12 in the direction of the arrow C '(second direction), and the movement opposite to that described above is performed. In other words, the slide plate 13 is set at the position shown in FIG. 2 (the position at the other end of the opening 2 on the back side of the front panel). As a result, the locked state of the door 3 is released, and the cassette tape 5 can be freely inserted and ejected.

As described above, according to the present embodiment, the slide plate 13 is set to the position shown in FIG. Since the state is maintained, the same effect as that described in the first embodiment can be obtained regardless of the power ON / OFF state.

Also in this embodiment, each of the units 11 to 13, 52
Constitutes "lock maintaining means", and each part 14, 15, 50
A and 51 constitute "lock command signal and unlock signal generation means".

As described above, according to the second embodiment, unless a predetermined operation is performed on the operation unit provided in the device,
Because the opening and closing door cannot be opened,
There is an effect that it becomes impossible to insert anything other than the predetermined cassette tape into the inside of the apparatus main body through the opening regardless of the power-on / off state of the apparatus main body.

(Embodiment 3) FIG. 6 is a perspective view showing the outer shape of a magnetic recording / reproducing apparatus according to the present embodiment.
FIG. 8 is a block diagram schematically showing a core part of a mechanism inside the VTR main body 1, and FIGS. 8 and 9 are partial longitudinal sectional views of a side surface of FIG. However, FIGS. 8 and 9 show the sensors 28 and 29 for convenience. The same components as those described above indicate the same components.

In this embodiment, normally, the door 3
Is maintained in a locked state so that it cannot be opened by the slide plate 13 set on the rear side of the door 3, as shown in FIG. Further, as shown in FIG. 6, sensors 28 and 29 are provided on both sides of the opening / closing door 3 so as to detect at least a cassette tape. Therefore, only when these sensors 28 and 29 are caused to react at the same time,
8 and 29 output the detection signals V28 and V29 of FIG. 7, and the control unit CNT outputs these detection signals V28 and V2.
9 generates a lock release signal V51 for driving and releasing the motor 52. As a result, as shown in FIG. 9, the drive unit 11 rotates the gear 12 in the direction of arrow C ', and The plate 13 is moved in the direction of the arrow D 'and is set at the lower position shown in FIG. Thereby, the door 3
Can be pushed freely. That is,
The sensor 28 and the sensor 29 can react at the same time, and only the sensor smaller than the opening 2 can be inserted into the VTR main body 1.

As a result, in the second embodiment and a fifth embodiment to be described later, the predetermined operation of the operation button as described above is remembered by the children, or the operator himself forgets the above operation. In some cases, the effects of those embodiments are not realized, and also in the sixth embodiment described below, if the operator loses the key, the effects cannot be obtained. On the other hand, in the present embodiment, such a situation does not exist at all, and the same effect as the effect described in the second embodiment can be obtained.

When the cassette tape 5 is inserted into the cassette holder, the controller 50B shown in FIG. 7 outputs a lock command signal V51, and the slide plate 13 moves in the direction D to return to the locked state shown in FIG. .

In the present embodiment, the sensor means provided on the opening / closing door 3 are the sensors 28 and 29 at two places on both sides. Action and effect can be obtained.

As described above, according to the third embodiment, sensors are provided on at least both sides of the door, and the door cannot be opened unless these sensors are caused to react at the same time. Even if the children can remember the predetermined operation described in Embodiments 2 and 5, or forget this operation, or even if the special device such as the key described in Embodiment 6 is lost, such a case is obtained. Regardless of circumstances, it becomes impossible to insert anything other than the predetermined cassette tape into the inside of the tape recorder main body through the opening.

(Embodiment 4) In this embodiment, when the opening / closing door is in a locked state and a cassette tape is inserted inside the apparatus main body, the lock is used to eject the cassette tape. The purpose is to add a function of automatically releasing the state to each lock structure of the second and third embodiments.

(1) The slide plate 13 described in the second embodiment
Is located immediately behind the door 3 shown in FIG.
When the cassette discharge button 30 shown in FIG. 1 is operated (cassette discharge operation) in a state where the cassette cannot be opened (locked state), the controller 50C in FIG. ) Also receives the signal V30 and generates and outputs the unlock signal V51 in the same manner as the signal V14. By the internal mechanism of the VTR body 1, the gear 12 described in the second embodiment rotates in the direction of arrow C ', and the slide plate 13 is moved in the direction of arrow D', and is set to the position shown in FIG. .

Thus, even if the user does not perform a plurality of button operations on the front panel or the remote controller as in the second embodiment, it can be easily opened and closed with a single one-touch operation of merely pressing the discharge button 30. The locked state of the door is released, and the cassette tape can be ejected.

(2) Applying the technical idea (cassette discharge function) of the above (1) to the third embodiment can achieve more effective results. That is, when the ejection button 30 in FIG.
Controller 50D similarly generates and outputs an unlock signal V51 in response to the input of the ejection (command) signal V30. Thus, the locked state of the door 3 is released in the same manner as in the above (1).

Therefore, in the third embodiment, since the cassette tape is inserted and the door 3 is kept in the locked state, the door 3 is supported by the slide plate 13 and the cassette tape is not ejected. You can prevent the situation.

In this embodiment, each part 28, 29,
The discharge button 30 functions as a "discharge signal generating means" in the "unlocking signal generating means" including the CNTs 30, 30 or 14, 15, 50C, 30.

As described above, according to the fourth embodiment, in particular, in the VTR described in the third embodiment, when the cassette tape is ejected, the lock maintaining structure of the door is automatically released and the door is opened. Since the opening / closing door lock maintaining structure is maintained, it is possible to prevent the cassette tape from being ejected while being supported by the opening / closing door.

(Embodiment 5) In the description of this embodiment, FIG. 1 is used as needed.

As described above, in the first to fourth embodiments, the opening / closing door is directly maintained in the locked state and the locked state is appropriately released, but here, the rotatable state is provided at the front portion of the front panel. The front door is provided on the front panel, and the front door is always locked, thereby indirectly maintaining the opening / closing door in a state where it is urged in the direction to close it, and It is designed to prevent the insertion of tapes and the like.

FIGS. 12 and 13 are partial longitudinal sectional views of the side surface when the front door is provided on the entire front surface of the front panel 7 shown in FIG. The position of the front door is not necessarily required to cover the entire front side of the front panel 7, but may be provided at least in a part of the front panel 7 so as to cover the opening 2. .

As shown in FIG. 12, at the front of the front panel 7 having the opening 2, the position E is set with the shaft 16 as a fulcrum.
The front door 17 rotatably provided between the front door 17 and the position E ′ is provided so that the magnet 18 provided above the opening 2 of the front panel 7 catches the metal piece 19 provided at the corresponding portion of the front door 17. , The closed state is maintained. Next, the cassette tape 5
Is inserted into the VTR main body 1, the front door 17 is turned from the position E to the position E '.

In the VTR having the above structure, by operating some predetermined operation buttons among the operation buttons 15 of the remote controller 9 shown in FIG.
The controller 50E shown in FIG. 14 receives the signal V14 'transmitted from the remote controller 9, and generates and outputs a lock command signal V51. Then, the motor 52 shown in FIG. 14 is driven, and the driving means 20 shown in FIG.
Rotates the gear 21 in the direction of the arrow F (first direction), whereby the slide plate 22 meshed with the gear 21 is moved in the direction shown by the arrow G to be set at the position shown in FIG. In this state, when the front door 17 is to be rotated, the protrusion 23 provided at one end of the front door 17 comes into contact with the back side of the slide plate 22 where the slide plate 22 is not meshed. It cannot be moved. As a result, the same effect as that described in the second embodiment can be obtained only by performing a predetermined operation on the operation button 15.

The unlocking of the front door 17 is performed in the same manner as in the second embodiment by operating the operation button 15 of the remote controller 9 in the same manner.

In this embodiment, each of the units 20 to 22 including the motor 52 constitutes a "lock maintaining means".
5, 50E and 51 constitute "lock command signal / unlock signal generation means".

As described above, according to the fifth embodiment, the rotatable front door provided at the front of the front panel cannot be opened unless a predetermined operation is performed on the operation unit provided in the apparatus. By doing so, the opening and closing door can not be opened, so the design effect of the design drawn on the front door covering the front panel and the operability improvement such that the operation button can be arranged behind the front door The same effect as that of the second embodiment can be obtained in the VTR with the above-mentioned structure, and it becomes impossible to insert anything other than the predetermined cassette tape into the VTR main body through the opening.

(Embodiment 6) Here, mechanical action is externally applied to a "lock maintaining means" for directly mechanically locking an opening / closing door provided inside a VTR main body.
The function of the lock maintaining means is exhibited.

Specifically, the driving means 11 of FIG.
The above function is realized by replacing the rotary key structure 24 having the shaft 27 shown in FIG. That is, a key 26 (corresponding to a predetermined device) is inserted into a keyhole 25 of a rotary key structure 24 provided on the back side of one of the side panels of the front panel 7 of the VTR main body 1, and is inserted in the direction of arrow H (first direction). When the key 26 is rotated (first mechanical action), the action is performed by the rotary key structure 24.
The gear 12 connected to the other end of the shaft 27 is rotated in the direction of arrow C shown in FIG. 2 along the shaft 27 connected to the gear 27, whereby the slide plate 13 meshed with the gear 12 is It is moved in the direction of arrow D, and is set at a position immediately behind the door 3 as shown in FIG. As a result, the opening / closing door 3 cannot rotate in the direction to open the opening 2 and the locked state is maintained thereafter.

When the key 26 is rotated in the direction opposite to the direction of the arrow H (second mechanical action), a movement opposite to that described above is made.
The slide plate 13 is set at the position shown in FIG.
The freedom to open and close.

As described above, in the present embodiment, the first mechanical action is performed using the key 26,
Since the slide plate 13 is set to the position shown in FIG. 3 by transmitting the information to 27, 12, and 13, the door 3 cannot be opened with the door 3 thereafter, and further, the door 3 is to be opened. In that case, the key 26 is required. That is, it is possible to limit those who can open the door 3 locked in the closed state. Therefore, Embodiment 2
In steps 5 and 5, when the children learn the lock command of the opening / closing door 3 and the operation of the operation button for unlocking, or when the operator himself forgets such an operation, the purpose / effect is changed. On the contrary, in the present embodiment, such a situation does not occur at all, and the same effects as those described in the second and fifth embodiments can be surely obtained.

As described above, according to the sixth embodiment, the door cannot be opened unless a special device such as a key is used. Therefore, the person who can open the door is limited. Even if the children can learn the predetermined operation described in the second and fifth embodiments, it is possible to insert anything other than the predetermined cassette tape into the inside of the tape recorder main body through the opening. Can not be done.

(Modification of the Sixth Embodiment) In addition to the lock structure of the sixth embodiment, the function as described in the fourth embodiment, that is, the opening / closing door for ejecting the inserted cassette tape is provided. It is also possible to add a function of automatically releasing the locked state. That is, the other end of the shaft 27 shown in FIG. 15 on the opposite side to the keyhole 25 is engaged with a gear (not shown), and this gear is driven by a motor 52 'shown in FIG. Then, the shaft 27 may be forcibly rotated in the direction opposite to the H direction to slide the slide plate 13 to a position below the other end of the opening 2 so that the door 3 can be freely opened. As the means for generating the automatic ejection signal, the ejection button 30 of FIG. 1 and the operation button 15 of the remote controller 9 described above can be used.

As described above, according to the present modification, without pressing the key 26 into the keyhole 25 to give a mechanical action, the user can simply press the eject button 30 or the like.
With this operation, the locked state of the door 3 is automatically released and the cassette tape can be ejected. Further, if the key 26 itself is lost, a situation occurs in which the locked state of the opening / closing door 3 cannot be released. According to the present modification, such a situation can be avoided. Become.

[0066]

According to the first aspect of the present invention, the state where the opening and closing door is urged in the direction to close the opening is maintained unless a predetermined physical action is given. A state where the magnetic recording medium cannot be inserted through the opening can be realized. This makes it possible to prevent unnecessary foreign substances, such as toys and food, from being inserted into the magnetic recording / reproducing apparatus through the opening, for example, due to children's mischief.

According to the second aspect of the present invention, the always-on state of the open state of the door is controlled by the presence or absence of the predetermined unlocking signal. Can be easily obtained.

According to the third aspect of the present invention, the door is directly locked in the non-rotatable lock state based on both the lock command signal and the lock release signal and the lock state is released. Therefore, as long as the lock release signal is not electrically generated in the magnetic recording / reproducing apparatus, an effect is obtained that a lock structure that always keeps the opening / closing door locked in the biased state can be realized.

According to the fourth aspect of the present invention, the sensor means is provided on the door and the door is always unlocked only in response to a detection signal generated by the sensor means. can get. That is, the sensor means
Practically, it only detects that only the magnetic recording medium is inserted from the opening / closing door, and there is no reaction even if other foreign substances are inserted into the apparatus from the opening / closing door. Therefore, unless the magnetic recording medium is inserted into the apparatus through the door, the operator cannot release the locked state of the door, and almost no foreign matter is inserted due to mischief of children. It is possible to surely prevent it. Because, according to the present invention, there is no need to perform a special operation to release the lock state of the opening / closing door and generate an unlock signal to the apparatus, and such an operation is remembered by children. This is because there is no need to worry about it. Also, if a special device such as a key is used to generate and release the locked state of the door, if the children have such a special device,
There is a concern that the prevention effect will not be realized and that if the special device is lost, it will not be possible to release the locked state of the door. However, in the present invention, since the release of the locked state is controlled by the detection signal of the sensor means, such a concern does not occur at all.

As described above, according to the present invention, the locked state of the opening / closing door is reliably maintained to prevent unnecessary insertion of foreign matter, and when a magnetic recording medium is inserted, and only then, It is possible to reliably release the locked state.

According to the fifth aspect of the present invention, since the lock command signal and the lock release signal are generated by a predetermined operation, it is possible to prevent the door from being opened unless the predetermined operation is performed. The effect that it can be obtained is obtained.

Further, the predetermined operation can be realized by operating an operation button provided on the front panel or by operating an operation button on a remote control device. There is an advantage that the door can be easily locked at all times, and the lock of the door can be easily released when necessary. In addition, there is an effect that the above-mentioned effect can be realized irrespective of the power ON / OFF state of the present apparatus.

According to the sixth aspect of the present invention, since the lock maintaining means is further provided with a function for releasing the lock of the opening / closing door in response to the generation of the discharge signal, the magnetic recording medium is discharged from the apparatus. In such a case, an effect is obtained in which the locked state of the door can be automatically released and the door can be opened, thereby preventing the magnetic recording medium from being ejected by the door. Generation can be prevented.

According to the seventh aspect of the present invention, the locked state of the opening / closing door is controlled by using the power ON / OFF state of the magnetic recording / reproducing apparatus, so that unnecessary foreign substances are opened when the power is OFF. The device can be prevented from being inserted into the inside of the apparatus. Therefore, if it is desired to prevent foreign objects from being inserted into the apparatus by children, it is sufficient to simply turn off the power of the apparatus, and the object can be easily achieved.

According to the eighth aspect of the present invention, the front door is provided so that the front door is always in a locked state. Therefore, a design can be applied to the front door, and an operation unit can be provided there to provide a design effect or a design effect. There is an effect that the same effect as the effect described in claim 1 or 2 can be realized by using the front door capable of improving operability.

According to the ninth aspect of the present invention, the locked state of the door can be realized and released by a predetermined device, so that the door cannot be opened unless the device is used. is there. As a result, in the present invention, it is possible to limit what can release the locked state of the opening / closing door, and there is also a concern that the operation for unlocking may be learned by children and the purpose may not be achieved. And the door can be locked at all times except when the magnetic recording medium is inserted,
It is possible to reliably prevent a situation in which a foreign object is inserted into the inside of the apparatus.

[Brief description of the drawings]

FIG. 1 is a perspective view of a VTR showing Embodiments 1 and 2 of the present invention.

FIG. 2 is a view showing V according to Embodiments 1, 2 and 6 of the present invention;
It is a vertical side view of TR.

FIG. 3 is a view showing V according to Embodiments 1, 2, and 6 of the present invention;
It is a vertical side view of TR.

FIG. 4 is a block diagram showing internal control according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing internal control according to Embodiment 2 of the present invention.

FIG. 6 is a perspective view of a VTR showing a third embodiment of the present invention.

FIG. 7 is a block diagram showing internal control according to Embodiment 3 of the present invention.

FIG. 8 is a vertical side view of a VTR showing a third embodiment of the present invention.

FIG. 9 is a longitudinal sectional side view of a VTR showing a third embodiment of the present invention.

FIG. 10 is a block diagram showing internal control according to Embodiment 4 of the present invention.

FIG. 11 is a block diagram showing another internal control according to the fourth embodiment of the present invention.

FIG. 12 is a vertical sectional side view of a VTR showing a fifth embodiment of the present invention.

FIG. 13 is a vertical sectional side view of a VTR showing a fifth embodiment of the present invention.

FIG. 14 is a vertical sectional side view of a VTR showing a fifth embodiment of the present invention.

FIG. 15 is a perspective view of a VTR showing a sixth embodiment of the present invention.

FIG. 16 is a block diagram showing internal control according to a modification of the sixth embodiment of the present invention.

FIG. 17 is a vertical sectional side view of a VTR showing a conventional technique.

FIG. 18 is a vertical sectional side view of a VTR showing a conventional technique.

FIG. 19 is a vertical sectional side view of a VTR showing a conventional technique.

FIG. 20 is a vertical sectional side view of a VTR showing a conventional technique.

FIG. 21 is a vertical sectional side view of a VTR showing a conventional technique.

FIG. 22 is a vertical sectional side view of a VTR showing a conventional technique.

[Explanation of symbols]

1 VTR main body, 2 opening, 3 door, 4 axis, 5
Cassette tape, 6 cassette holder, 7 front panel, 8 power button, 9 remote control, 10 power button, 11
Driving means, 12 gears, 13 slide plate, 14 operation buttons, 15 operation buttons, 16 axes, 17 front door, 18 magnets, 19 metal pieces, 20 driving means, 21 gears, 22
Slide plate, 23 protrusion, 24 rotary key structure, 2
5 keyholes, 26 keys, 27 axes, 28 sensors, 29
Sensor, 30 cassette eject button, 31 rotating plate, 32
axis.

Claims (9)

[Claims] 1. A front panel, an opening disposed in the front panel for inserting and ejecting a magnetic recording medium,
A magnetic recording / reproducing apparatus comprising: an opening / closing door rotatably supported on a part of the panel at one end of the opening as a fulcrum and urged in a direction to close the opening. Unless provided to the magnetic recording / reproducing device, the opening / closing door keeps being kept urged in the direction to close the opening to prevent insertion of the magnetic recording medium, Magnetic recording and reproducing device. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the state of the door is kept urged in a direction to close the opening unless a predetermined unlock signal is given as the physical action. A magnetic recording / reproducing apparatus, further comprising a lock maintaining means for preventing insertion of the magnetic recording medium while maintaining the state of the magnetic recording medium. 3. The magnetic recording / reproducing apparatus according to claim 2, further comprising: a lock command signal generating unit that generates a lock command signal; and a lock release signal generating unit that generates the lock release signal. Receiving the lock command signal, mechanically locks the state of the opening / closing door in a state where the door is urged in a direction to close the opening, and locks the opening when receiving the lock release signal. A magnetic recording / reproducing apparatus, wherein a state is released to enable insertion of the magnetic recording medium. 4. The magnetic recording / reproducing apparatus according to claim 3, wherein the unlock signal generating means is provided on the opening / closing door, and has a size equal to or greater than the size corresponding to the magnetic recording medium and corresponding to the opening. A magnetic recording / reproducing apparatus, comprising: sensor means for detecting only the presence of an object smaller than the sensor, generating the lock release signal in response to a detection signal of the sensor means, and outputting the signal to the lock maintaining means. 5. The magnetic recording / reproducing apparatus according to claim 3, wherein the lock command signal generating means and the unlock signal generating means generate the lock command signal and the unlock signal in accordance with a predetermined operation, respectively. A magnetic recording / reproducing device, characterized in that: 6. The magnetic recording / reproducing apparatus according to claim 4, wherein the lock release signal generating unit outputs a discharge signal for instructing discharge of the magnetic recording medium in accordance with an operation for discharging the magnetic recording medium. The magnetic recording / reproducing apparatus according to claim 1, further comprising a discharge signal generating unit for generating the lock release signal in response to the discharge signal and outputting the unlock signal to the lock maintaining unit. 7. The magnetic recording / reproducing apparatus according to claim 3, wherein the lock command signal generating means and the unlocking signal generating means are respectively provided only when the magnetic recording / reproducing apparatus is in a power-off state and a power-on state. A magnetic recording / reproducing apparatus for generating a lock command signal and the lock release signal. 8. The magnetic recording / reproducing apparatus according to claim 2, wherein the front panel is rotatable at a front portion of the front panel so as to cover at least the opening urged in a direction to close the opening. And a front door disposed on a part of the front panel, a lock command signal generating unit for generating a lock command signal, and a lock release signal generating unit for generating the lock release signal. Upon receiving the lock command signal, the front door is mechanically locked to cover the opening, and when the lock release signal is received, the locked state of the front door is released and the magnetic recording medium is locked. A magnetic recording / reproducing apparatus characterized in that insertion is possible. 9. The magnetic recording / reproducing apparatus according to claim 1, wherein when the first mechanical action is given by a predetermined device, the state of the opening / closing door is urged in a direction to close the opening. When mechanically locked to the state as it is to prevent insertion of the magnetic recording medium, and the second mechanical action by the predetermined instrument is given as the physical action,
A magnetic recording / reproducing apparatus, comprising: a lock maintaining unit that releases a locked state of the door and enables insertion of the magnetic recording medium.