JPH0711882B2 - Cassette type magnetic tape unit - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cassette type magnetic tape device for recording and / or reproducing information, and more particularly, suitable for recording and / or reproducing digital signals. Magnetic tape device.

[Prior Art] In a magnetic tape device, the relative positional relationship between the magnetic head and the magnetic tape must be set accurately. A general magnetic tape device is configured to carry a magnetic tape cassette to a predetermined position and then move a magnetic head to bring it into contact with the magnetic tape to start recording or reproduction. That is, the conventional magnetic tape device is configured to move both the tape cassette and the magnetic head. Therefore, there is a drawback that it is difficult to accurately set the relative positional relationship between the magnetic head and the magnetic tape.

In order to solve this kind of drawback, the magnetic head is substantially fixed, and the tape cassette is moved in a plane from the attaching / detaching opening to the magnetic head facing position (data exchange position).
A magnetic tape device constructed so that the reel shaft is engaged with the hub of the tape cassette is disclosed in JP-A-60-85454.

[Problems to be Solved by the Invention] In the magnetic tape device disclosed in the above publication, when the tape cassette is inserted into the opening of the magnetic tape device, the tape cassette automatically moves to the data conversion position by the force of the spring. The reel shaft is configured to automatically engage with the hub of the tape cassette as it moves. Therefore, it is excellent in terms of usability. However, in addition to the problem that the mechanism for automatically engaging the reel shaft with the hub becomes complicated after the tape cassette is loaded in the data conversion position, the reel shaft is damaged when the magnetic head cleaning cassette is inserted. I was afraid to do it. That is, when cleaning the magnetic head, as disclosed in Japanese Utility Model Laid-Open No. 61-174012, a reel shaft is inserted in the magnetic head cleaning cassette to prevent the guide pins from being positioned on both sides of the magnetic head. No holes are provided. Thus, even if the cleaning cassette is inserted, the reel shaft and the guide pin are prevented from entering the cassette, and the magnetic head can be cleaned with a cleaning body such as a cotton swab without being obstructed by the guide pin. However, since the conventional device is configured so that the reel shaft is automatically raised in association with the loading of the tape cassette, the reel shaft may collide with the bottom surface of the cleaning cassette and the reel shaft may be damaged.

Therefore, an object of the present invention is to provide a cassette type magnetic tape device which can not only simplify the structure but also prevent damage to the reel shaft when cleaning the magnetic head.

[Means for Solving the Problems] The present invention for achieving the above object comprises a magnetic tape, a pair of hubs around which the tape is wound, and a cassette half that houses the tape and the pair of hubs. The cassette half uses a magnetic tape cassette having a pair of main surfaces, a front surface having a head insertion opening for exposing the magnetic tape, a back surface facing the front surface, and a pair of side surfaces to convert signals. In the cassette type magnetic tape device, the tape cassette has a first
And a second position, the tape cassette attaching / detaching opening is provided on the plane, and the centers of the first positions are orthogonal to each other on the plane. It is set on the intersection of the first and second virtual straight lines, the center of the second position is set on the second virtual straight line slightly apart from the intersection, and the tape cassette attachment / detachment opening is A case set on a first virtual straight line and a signal exchange attached to the case so as to contact the magnetic tape through the head insertion opening when the tape cassette is placed in the second position. The magnetic tape and the tape cassette in response to the tape cassette being inserted to the first position along the first virtual line through the tape cassette attaching / detaching opening. A cassette moving mechanism for moving from the first position to the second position; and a tape running device including a pair of reel shafts for engaging with the hub of the tape cassette placed in the second position. , Moving the reel shaft from a hub separation position to a hub engagement position for engaging the hub of the tape cassette placed at the second position, and moving the reel shaft from the hub engagement position to the hub separation position. The present invention relates to a cassette-type magnetic tape device, comprising: a reel shaft moving mechanism for operating the reel shaft moving mechanism; and an operating member for manually operating the reel shaft moving mechanism.

The cassette moving mechanism in the above invention is, for example, the loading lever 44, the pin 43, the sliding plate 46, the spring 47, the control rotating plate 48, the carriage 42, the protruding portion 51 having the guide groove 52, the guide pin 53, etc. in the embodiment. Can be composed of
As shown in the embodiment, the cassette moving mechanism is preferably configured to automatically move the tape cassette 1 from the first position to the second position by the force of the spring 47, but the tape cassette 1 is manually moved to the first position. It is also possible to configure to move from the position of 1 to the second position.

The reel shaft moving mechanism of the present invention is, for example, as shown in the embodiment, a rotary shaft 69, an arm 70, a connecting rod 71, a slider 72 having an inclined groove 87, a support substrate 26 for a reel shaft, and a pin 75.
Etc. As shown in the embodiment, it is desirable to move the tape running device 25 including the reel shafts 29 and 30, the reel motors 27 and 28, and the guide pins 31 and 32 at the same time, but in some cases, only the reel shafts 29 and 30 are hubs. It can also be configured to move relative to.

The operating member of the present invention is preferably a rotary type operating lever 68 as shown in the embodiment, but may be a push button type linearly moving operating member.

[Operation] When the tape cassette is inserted to the first position of the magnetic tape device of the present invention, the tape cassette moving mechanism automatically moves the tape cassette from the first position to the second position. After that, when the operation member is operated, the reel shaft engages with the hub of the tape cassette, and the tape can be moved. When a cleaning cassette having no reel shaft insertion hole is inserted, this cleaning cassette is also loaded in the second position. In this case, the operation member is not operated to raise the reel shaft, and the reel shaft is kept at the hub separating position. As a result, damage to the reel shaft can be prevented.

[Embodiment] Next, a cassette type magnetic tape device according to an embodiment of the present invention will be described with reference to the drawings.

[Tape Cassette] The tape cassette 1 used in this magnetic tape device is
As shown in FIG. 16 and FIG. 17, one main surface (front surface) 2, the other main surface (rear surface) 3 facing this, front surface 4, back surface 5 facing this, first side surface 6, and this Second opposite to
Inside the cassette half (case) 8 having the side surface 7 of
Magnetic tape 9 and first and second reels or hubs 10, 11
It accommodates and. The pair of hubs 10 and 11 are rotatably arranged between the front surface 2 and the back surface 3 of the half 8, and the reel shaft insertion holes 12 and 13 and the guide pin insertion holes 14 and 15 are provided on the front surface 2 and the back surface 3. Although a capstan is inserted in a general tape recorder, this embodiment has a hole 16 into which a light emitting element for detecting the tape start end (BOT) and the tape end (EOT) is inserted instead. . Five openings 17 or windows are provided on the front surface 4 of the cassette half 8, and the A surface or the front surface 2 and the B surface or the rear surface 3 of the cassette 1 are located at positions slightly deviated from the center of the rear surface 5 of the cassette half 8. A recess 18 is provided for distinguishing.

[Magnetic Head] The cassette-type magnetic tape device 20 has a magnetic head mounted on a substrate 22 of a case (container) 21 as shown in FIG.
With 23. The magnetic head 23 contacts the magnetic tape 9 of the tape cassette 1 to record and reproduce data. The magnetic head 23 cannot move in the direction orthogonal to the signal conversion gap surface 24, but is moved in the track axis direction by a head moving mechanism (track switching mechanism) not shown. The track switching mechanism of the magnetic head 23 has the same principle as that disclosed in JP-A-60-85454.

[Tape Running Device] The magnetic tape device 20 has a tape running device 25 shown in FIG. The tape running device 25 is configured by disposing a pair of reel motors 27, 28, a pair of reel shafts 29, 30 and a pair of guide pins 31, 32 on a support substrate 26. The pair of reel shafts 29, 30 is a pair of reel motors 27, 28.
Is directly connected to and extends in a direction orthogonal to the supporting substrate 26. The pair of guide pins 31 and 32 also extend in a direction orthogonal to the support substrate 26. The tape running device 25 is a case
As shown in FIG. 12, the reel shafts 29 and 30 are not fixedly arranged on the tape cassette 1 and the positions where they are separated from the tape cassette 1.
As shown in FIG. 14, the reel shafts 29 and 30 are configured to move between the reel shafts 29 and 30 and the position where they are inserted into the tape cassette 1. The moving mechanism of the tape running device 25 will be described later in detail. The tape running device does not include a capstan or a pinch roller. Therefore, the tape speed detecting roller (not shown) detects the speed of the tape 9 and controls the reel motors 27 and 28.

[Case] A front plate 33 of the case 21 for accommodating and mounting each part is provided with a cassette attaching / detaching opening 34 as shown in FIGS. 4, 5 and 6. This cassette opening 34
As is apparent from FIG. 2, the tape cassette 1 is formed so that the tape cassette 1 can be inserted with a directivity that coincides with a straight line connecting the pair of hubs 10 and 11. That is, the substrate 22 of the case 21
A cassette attachment / detachment opening 34 is provided on the upper plane so that the tape cassette 1 can be inserted along a first imaginary straight line 35 written as shown in FIG. The tape cassette 1 is inserted so that the front surface 2 and the back surface 3 thereof are parallel to the substrate 22, and the tape cassette 1 is at the first position shown by a broken line 36 in FIG. 2 and at the second position shown in FIG. Take a position and. Second
The position of the second is orthogonal to the first virtual straight line 35 on one plane.
This is the position where the tape cassette 1 is moved along the second virtual straight line 37 shown in the figure. In FIG. 2, the intersection 38 of the first virtual straight line 35 and the second virtual straight line 37 is the substantial center of the tape cassette 1 at the first position (the midpoint between the reel hubs 10 and 11), and the second The center of the tape cassette 1 at the position is a point 37a slightly moved from the intersection 38 to the left along the second virtual straight line 37. The second position of the tape cassette 1 is a position (data conversion position) where the magnetic head 23 comes into contact with the magnetic tape 9 of the tape cassette 1 as is clear from FIG.

In order to enable the tape cassette 1 to take the first position and the second position, as shown in FIG. 1, the stopper projection 39 and the front positioning projection 4 are provided on the substrate 22 of the case 21.
0, a back guide protrusion 41 is provided. The tape cassette 1 is manually inserted along the first imaginary straight line 35 in FIG. 2, and the side surface 6 of the tape cassette 1 is a protruding portion for stopper.
When the vicinity of 39 is reached, the tape cassette 1 assumes the first position. After that, it is moved along the second imaginary straight line 37 by the cassette moving mechanism, and as shown in FIG.
Collides with the front surface positioning protrusion 40 and assumes a second position.
The stopper protrusion 39 is provided to prevent the tape cassette 1 from being inserted more than necessary along the first virtual straight line 35.

[Cassette Moving Mechanism] The cassette moving mechanism includes a cassette carriage 42 which can be called a cassette guide or a cassette holder shown in FIGS. 1, 10 and 11 and a carriage as shown in FIGS. 10 and 11. Cassette pressing pin 43 rotatably connected to one end of 42, and FIG. 7, FIG. 8, FIG. 10 and FIG.
As shown in the figure, a cassette loading lever 44 in which a pin 43 is planted, and a sliding plate 46 connected by a pin 45 to the loading lever 44 of a rotating arm configuration as shown in FIGS. 7 and 8. The sliding plate 46 includes a loading coil spring 47 which applies a biasing force to the right in FIG. 7, and a control rotation plate 48 for controlling the operation of the sliding plate 46.

Each part of the cassette moving mechanism will be described in more detail. As shown in FIG. 10, the cassette pressing pin 43 is provided with an inverted frustoconical pressing part 43a and a connecting shaft part 43b, and
A connecting shaft portion 43b is rotatably inserted into a through hole 49 provided in the shaft 42. A screw 50 is screwed into the screw hole of the connecting shaft portion 43b, and the head of the screw 50 prevents the carriage 42 from coming off.

The carriage 42 moves only in the left-right direction (direction of the second virtual straight line 37 in FIG. 2) in FIGS. 1 and 10. In order to stably achieve the movement in this direction, two protrusions 51 are provided on the left end side in FIG. 1 of the carriage 42, and guide grooves 52 are formed therein, and guide pins 53 are formed in the guide grooves 52. Has been inserted. The pin 53 is supported by a pin support 54 fixed to the substrate 22 as shown in FIG. Since the guide groove 52 extends parallel to the second virtual straight line 37 in FIG. 2, the carriage 42 moves in the direction of the second virtual straight line 37.

A loading lever 44 having a cassette pressing pin 43 at one end is rotatably supported by a shaft 57 planted on a sub-board 56 fixed to the main board 22 with screws 55 as shown in FIG. . A pin 45 is planted at the other end of the loading lever 44, and the pin 45 is inserted into the hole 46a of the sliding plate 46. Since the pin 45 is inserted in the hole 46a with a margin, the loading lever 44 can freely rotate.

As shown in FIG. 7, the sliding plate 46 that slides on the main board 22 has two elongated guide holes extending parallel to the second virtual straight line 37.
58a and 58b are formed, and fixing pins 59a and 59b planted in the main board 22 are inserted therein. Therefore, the sliding plate 46 slides only in the direction parallel to the second virtual straight line 37. One end of the cassette loading coil spring 47 is locked to the sliding plate 46, and the other end is locked to a spring locking projection 60 provided on the substrate 22. Therefore, the sliding plate 46 is biased to the right in FIG. 7 by the spring 47.

The control rotation plate 48 is rotatably supported by the fixed pin 59a. A cassette engaging portion 61 is provided at one end of the control turning plate 48, and a coil spring 62 is provided between the other end of the control turning plate 48 and the locking projection 60. The bias is always given to. The pin 64 implanted in the sliding plate 46 is inserted into the hole 63 having the cam surface of the control rotation plate 48. The hole 63 has a surface 65 that prevents the pin 64 from moving to the right and a straight portion 66 that allows the pin 64 to move to the right. The fan blocking surface 65 is a pin
Since it is an arcuate surface centered on 59a, it prevents the pin 64 from moving to the right while the pin 64 is in contact therewith.

Next, the operation of the cassette moving mechanism will be described. First, the first
When the tape cassette 1 is inserted along the first imaginary straight line 35 in the cassette eject state shown in FIGS. 2, 2 and 7, the side surface 6 of the tape cassette 1 is controlled by the control rotation plate 48.
The cassette engaging portion 61 of is pressed. When the tape cassette 1 is further inserted, the control turning plate 48 turns counterclockwise in FIGS. 2 and 7 against the ejecting coil spring 62.
When the turning of the control turning plate 48 advances by the insertion of the tape cassette 1, the pin 64 passes over the end of the blocking surface 65, the blocking of the pin 64 by the control turning plate 48 is released, and the pin 64 can freely move to the right. Then, the sliding plate 46 moves to the right as shown in FIG. 8 by the force of the loading coil spring 47. As a result, the pin 45 of the loading lever 44 is pressed by the sliding plate 46 and is rotated clockwise about the shaft 57 as shown in FIG. 8, and the pressing portion 43a of the cassette pressing pin 43 is moved to the tape cassette. The back surface 5 of 1 is pressed to move the tape cassette 1 to the left along the second virtual straight line 37. As a result, the tape cassette 1 is loaded in the second position shown in FIG. 3, and the magnetic head 23 contacts the magnetic tape 9. Also, tape cassette 1
The positioning protrusion 40 comes into contact with the front surface 4 of the
Positioning in 37 directions is achieved. The tape cassette 1 is held on the substrate 22 by the downward movement of the two cassette pressing springs 67. The carriage 42 is a loading lever.
Since it is connected to 44, it moves with the tape cassette 1 along the second virtual straight line 37.

[Reel Shaft Movement and Ejection Mechanism] In this magnetic tape device, even if the tape cassette 1 is moved from the first position shown in FIG. 2 to the second position shown in FIG. Does not rise automatically. Therefore, it is necessary to manually raise the reel shafts 29 and 30 to engage the hubs 10 and 11. Because of this behavior, the case
An operation lever 68 is provided outside the front plate 33 of 21.
The operating lever 68 is at the first angular position in FIG. 4 in the eject state, and is in the second position in FIG. 5 in the cassette loading state.
6 and is in the third angular position in FIG. 6 when the reel shafts 29, 30 are raised.

As shown in FIGS. 9 and 11, the connecting mechanism between the operating lever 68 and the support substrate 26 of the tape traveling device 25 includes a rotating shaft 69, a pair of link arms 70, and a pair of link connecting rods (links). Plate 71, a slider 72, a pin 73 for rotatably connecting the connecting rod 71 to the arm 70 as shown in FIGS. 12 to 14, and a pair of connecting rods 71 for connecting the connecting rod 71 to the slider 72. Pin 74
And three pins 75 for engaging the slider 72 with the support substrate 26.

The rotary shaft 69, to which the operation lever 68 is fixed at one end, is rotatably supported by a pair of bearings 76 attached to the sub-board 56 and extends parallel to the first virtual straight line 35.

The arm 70 forming a link is fixed to the rotary shaft 69 and has a connecting pin 73 at its tip. Arm by pin 73
The connecting rod 71, which is rotatably connected to the 70, has an elongated hole 77 as shown in FIG. 12, and a pin 74 implanted in the slider 72 is inserted into the elongated hole 77.

As shown in FIG. 9, the slider 72 is composed of a pair of side plate portions 78, 79 perpendicular to the substrate 22 and a connecting plate portion 80 parallel to the substrate 22, and the pin 74 is a side plate portion 78, Stuck to 79,
It extends in the same direction as the rotating shaft 69.

In addition to the main surface portion 81 parallel to the main substrate 22, the support substrate 26 also has the main substrate 22.
The side surface portions 82 and 83 are perpendicular to each other, and two engaging pins 75 are provided on one side surface portion 82 and one engaging pin 75 is provided on the other side surface portion 83.

The side plate portions 78, 79 of the slider 72 are provided with a groove 87 having an inclined portion 84 and upper and lower horizontal portions 85, 86 continuous with the inclined portion 84. Further, as shown in FIG. 9, the slider 72 is provided with a pair of guide portions 89 each having a long hole 88 extending parallel to the second virtual straight line 37 shown in FIG. Board in slot 88
The pin 90 implanted in 22 is inserted. Therefore, the slider 72 is movable only in the direction of the second virtual straight line 37 shown in FIG. A spring 92 is provided to assist the slider of the slider 72, and the slider 72 is biased to the right in FIG.

A pair of pins 92 extending perpendicularly to the main substrate 22 are provided to move the support substrate 26 of the tape running device 25 only in a direction perpendicular to the main substrate 22, and the pins 92 are the support substrates.
It is inserted through 26 through holes 93.

In order to connect the rotating shaft 69 to the loading lever 44,
As shown in FIG. 11, the pin 94 protruding from the lower surface of the loading lever 44 is the pin of the arm 95 protruding from the rotating shaft 69.
96 is configured to engage.

In order to stably maintain the third angular position of the operating lever 68 shown in FIG. 6, the pin at the tip of the arm 70 as shown in FIG.
A stopper 97 with which the 73 abuts is provided, and an elastic protrusion 98 for pressing the pin 73 against the stopper 97 is provided. The stopper 97 and the elastic protrusion 98 are formed by processing a part of the sub-board 56. The elastic protrusion 98 is the rotating shaft
It is composed of an arcuate portion centered on 69, and is formed so that the pin 73 is sandwiched between this tip and the stopper 97.
The position of the stopper 97 is set so as to prevent movement of the straight line connecting the center of the rotary shaft 69 and the center of the pin 74 beyond a position slightly above the center of the pin 73 from the lower side toward the upper side. ing.

Next, the reel shaft movement and the operation of the eject mechanism will be described. The tape cassette 1 is inserted to the first position along the first imaginary straight line 35 in FIG.
When the loading lever 44 rotates in the clockwise direction as shown in FIG. 8 by moving to the second position shown in FIG. 3, the pin 94 protruding downward from the loading lever 44 is shown in FIG. In this way, the pin 96 of the arm 95 is pressed to slightly rotate the arm 95, the rotary shaft 69, and the arm 70 in the counterclockwise direction. This causes the operating lever 68 to rotate from the first angular position in FIG. 4 to the second angular position in FIG. The loaded tape cassette 1 will be
When it is desired to eject in the state shown in the figure, the eject is achieved by rotating the operation lever 68 in the counterclockwise direction.

As shown in FIGS. 3 and 5, the tape cassette 1 has a second
After being loaded at the position (data conversion position), the operation lever 68 is rotated clockwise to the third angular position shown in FIG. When the operating lever 68 is rotated, the rotating shaft 69 and the link arm 70 are rotated counterclockwise as shown in FIG. 14, and the link connecting rod 71 is rotated clockwise. While moving to the right. As a result, the slider 72 pin
74 is pressed to the right by the connecting rod 71, the slider 74 moves to the right, and the rotational movement (angular displacement) of the operation bar 68 is converted into the linear movement of the slider 72. As a result, the pin 75 slips out of the horizontal portion 85 of the groove 87, and the pin 75 becomes an inclined portion of the groove 87.
Pressed by 84. Since the inclined portion 84 is formed in the right downward direction in FIG. 13, when the pin 75 is pressed by the inclined portion 84,
A component that pushes up the pin 75 in the upward direction is given, and the support substrate 26 integrated with the pin 75 is guided by the vertical guide pin 92 and rises. When the operation lever 68 is turned until the pin 73 of the link arm 70 contacts the stopper 97, the pin 75 enters the horizontal portion 86 above the groove 87 as shown in FIG.
26 climbs stop. Further, in the state shown in FIGS. 14 and 15, the pin 73 is caused by a slight elastic deformation of the elastic protrusion 98.
Is pressed toward the stopper 97 by the tip of the elastic protrusion 98, and is stably held. The tip of the elastic protrusion 98 is formed into a surface having a curvature so that the pin 73 can be easily detached therefrom.

When the pin 75 of the support substrate 26 moves to the height shown in FIG. 14, the motors 27 and 28 supported by the support substrate 26 and the reel shafts 29 and 3 are supported.
0, the guide pins 31 and 32 also rise, and the reel shafts 29 and 30 are the substrate 2
The guide pins 31 and 32 are engaged with the hubs 10 and 11 of the tape cassette 1 through the through-holes 99 formed in 2, and the guide pins 31 and 32 are through-holes of the substrate 22.
Through the 100, it enters the through holes 14, 15 of the tape cassette. As a result, the tape 9 can be run.

When ejecting the tape cassette 1, first, the operation lever 68 is rotated counterclockwise from the third angular position in FIG. 6 to the second angular position in FIG. As a result, the reel shaft 2 is moved in the opposite operation to that when the reel shafts 29 and 30 are raised.
The 9, 30 and the guide pins 31, 32 come out of the tape cassette 1 and descend to the original position. That is, the link arm 70
Rotates clockwise, and the link rod 71 rotates counterclockwise. As a result, the slider 72 can move freely,
The slider 72 moves to the 9th position by the force of the return spring 91 shown in FIG.
It moves to the right in the figure and to the left in Figure 14. This allows
The inclined portion 84 of the groove 87 pushes down the pin 75,
And the supporting substrate 26 integral with this is returned to the position shown in FIG.

When the operating lever 68 is rotated from the second angular position shown in FIG. 5 to the first angular position shown in FIG. 4, the pin 96 of the arm 95 attached to the rotary shaft 69 causes the pin 94 of the loading lever 44 to move. It is pressed to the right in FIG. 13 (to the left in FIG. 8). As a result, the loading lever 44 rotates counterclockwise in FIG. 8 and returns to the position shown in FIG. When the loading lever 44 reaches the position shown in FIG. 7, the cassette pressing pin 43
Is displaced to the right, and the leftward pressing of the tape cassette 1 is released. Further, the carriage 42, which is connected to the loading lever 44 via the cassette pressing pin 43, is also displaced to the right along with the cassette pressing pin 43, and as shown in FIG. Transports the tape cassette 1 from the second position in FIG. 3 to the first position shown in broken lines in FIG. Move the operating lever 68 to the second position in FIG.
The sliding plate 46 moves to the left in FIG. 8 following the rotation of the loading lever 44 in the counterclockwise direction in FIG. 8 associated with the operation of rotating from the angular position in FIG. 4 to the first angular position in FIG. Move to
When the tape cassette 1 returns to the first position shown by the broken line in FIG. 2, the pin 64 of the drive plate 46 comes out of the linear portion 66 of the hole 63 of the control rotation plate 48. As a result, the rotation prevention by the pin 64 of the control rotation plate 48 is released, and the control rotation plate 48 is spring-loaded.
The tape cassette 1 is rotated clockwise by the force of 62, and the tape cassette 1 is ejected by the cassette engaging portion 61 to the position indicated by the solid line in FIG.
The sliding plate 46 is biased to the right in FIG. 7 by the spring 47, but since the pin 64 is blocked by the blocking surface 65 of the control rotary plate 48, the operation of the operating lever 68 is changed to the position shown in FIG. The sliding plate 46 does not move to the right even if it is released with.

[File Protect Mechanism] In order to prevent the recording on the tape 9 of the tape cassette 1 from being accidentally erased, a mechanism for detecting the presence or absence of the file protect (erroneous erasure prevention) claw 102 of the tape cassette 1 is provided. This file protect mechanism is configured to operate in synchronization with loading of the tape cassette 1,
First stacked on drive plate 46 for moving cassette
The file protection sliding plate 103 shown in the figure includes a reset rotating arm 105 rotatably engaged with a pin 104 on the sliding plate 103, and a photocoupler 110.

The file protection sliding plate 103 has a long hole 106 into which fixed pins 59a and 59b are inserted and moved only in the direction of the second virtual straight line 37 in FIG. The sliding plate 103 is formed in an L shape as a whole, and has a long hole 106 and has a second virtual straight line 37.
And a portion 103b extending parallel to the first imaginary straight line 35. Portion 103b is mostly hidden under reset arm 105 in FIGS. 1-3, but is clearly shown in FIG. The portion 103b has a tip 103c protruding toward the tape cassette 1 for detecting the presence or absence of the file protection claw 102 of the tape cassette 1.

The file protect control arm 105 is formed in a side-shape C-shape as shown in FIG.
It is rotatably supported by 7. One end of the upper arm 105a of the arm 105 has a U-shaped cutout portion and engages with the pin 104 of the sliding plate 103, and the end portion of the lower arm 105b with the pin 108 planted in the loading lever 44. Engaged. In addition,
The sliding plate 103 is biased leftward in FIG. 1 by a spring 109.

Next, the operation of the file protect mechanism will be described. When the tape cassette 1 is loaded in the data conversion position (second position) shown in FIG. 3, the loading lever 44 is rotated around the shaft 57 in the clockwise direction in FIG. The pin 108 is displaced leftward as shown in FIG. This allows the arm 105 to rotate counterclockwise. The blocking of the sliding plate 103 by the arm 105 is released,
The sliding plate 103 moves to the left by the biasing force of the spring 109,
As shown in FIG. 3, the tip 103c of 3b enters into the hole on the back surface 5 of the tape cassette 1, and the file protection nail 10
The presence or absence of 2 is detected. If the claw 102 is present, the tip 103c of the portion 103b is less likely to enter, and if the claw 102 is not present, the portion 1
The tip 103c of 03b is more likely to enter. As a result, the nail 102
The position of the slide plate 103 for file protection changes depending on the presence or absence of the photo protector, and the photocoupler 1 placed at the left end of the slide plate 103
The relationship with 10 also changes, and an output corresponding to the presence or absence of the claw 102 can be obtained.

[Cleaning of Magnetic Head] When cleaning the magnetic head 23 of this magnetic disk device, the same cleaning cassette as that disclosed in Japanese Utility Model Laid-Open No. 61-174012 is used instead of the tape cassette 1. Load the device. The cleaning cassette has an outer shape similar to that of the tape cassette 1, but does not have holes corresponding to the reel shaft insertion holes 12 and 13 of the tape cassette 1. When the cleaning cassette is loaded in the same manner as the tape cassette 1, the operation lever 68 rotates to the second angular position shown in FIG. Even when the cleaning cassette is loaded, the reel shafts 29 and 30 and the guide pins 31 and 32 are loaded in the same manner as when the tape cassette 1 is loaded.
Does not rise automatically. Therefore, the problem that the tips of the reel shafts 29 and 30 collide with and damage the cleaning cassette does not occur. Since the guide pins 31 and 32 do not project to both sides of the magnetic head 23, the gap surface of the magnetic head 23 can be cleaned with the cleaning rod without being obstructed by the guide pins 31 and 32. The cleaning cassette is provided with a passage for guiding the cleaning rod to the magnetic head 23. After the magnetic head is cleaned, the operating lever 68 is returned from the second angular position in FIG. 5 to the first angular position in FIG. As a result, the cleaning cassette is ejected as in the case of the tape cassette 1.

The cassette device of this embodiment has the following advantages.

(1) The reel shafts 29 and 30 are configured not to be automatically raised in response to the completion of the movement of the tape cassette 1 from the first position (cassette insertion position) to the second position (data conversion position). Therefore, even when the cleaning tape cassette is loaded, the reel shafts 29 and 30 do not automatically rise, and the reel shafts 29 and 30 are not damaged.

(2) Since it is not necessary to automatically raise the reel shafts 29 and 30 in response to the completion of the movement of the tape cassette 1 from the first position to the second position, the structure of the lifting mechanism of the reel shafts 29 and 30 is configured. It can be simplified. Further, in the conventional device, since the reel shaft is configured to be raised by the force of the spring, a large operating force is required to lower the reel shaft to eject the tape cassette, but according to the present embodiment, this operation is performed. The power becomes smaller.

(3) Since the eject operation button is not a push button type but is formed by the operation lever 68, not only the amount of protrusion of the operation portion from the front plate 33 can be reduced, but also the eject and reel shafts can be operated with a small operation force. 29, 30 etc. can be raised and lowered.

(4) Since the reel shafts 29, 30 are moved up and down and the tape cassette 1 is ejected by the single operation lever 68, not only the operation is easy, but also the operation portion can be simplified. it can. Further, it is not necessary to adjust the timing between the elevation of the reel shafts 29 and 30 and the ejection of the tape cassette 1.

(5) Since the operating member is composed of the operating lever 68 whose angular position changes, the operating state can be clearly known by the angular position of the operating lever 68.

(6) The operation lever 68 has an opening for inserting the tape cassette 1.
Since it rotates so as to cross 34, when the tape cassette 1 is incompletely inserted, the operation lever is attached to the tape cassette 1.
68 hits and cannot rotate. Therefore, it is possible to prevent the reel shafts 29, 30 from rising when the tape cassette 1 is incompletely inserted. In addition, the incomplete insertion of the tape cassette 1 can be easily known.

(7) A single loading lever 44, a cassette pressing pin 43, a file protection mechanism control pin 108,
Since the pin 94 for associating with the rotating shaft 69 is provided, a plurality of mechanisms can be associated with a simple configuration.

(8) Since the slide plate 103 for file protection is arranged so as to overlap the slide plate 46 for loading, the guide pin 59
Not only can a and 59b be shared, but effective use of space has also been achieved.

(9) Inverse frustoconical pressing portion on cassette pressing pin 43
43a is provided to press the boundary between the front surface 2 or the back surface 3 and the back surface 5 of the tape cassette 1, so that the tape cassette 1
The component of the force in the direction of pressing the substrate 22 against the substrate 22 is obtained, and the tape cassette 1 can be held with good stability.

(10) Since the protruding portion 51 having the groove 52 is provided at the end portion of the carriage 42 and the pin 53 is inserted therein to guide the carriage 42 linearly, the structure of the guide portion is simplified and miniaturized. Has been achieved.

(11) As shown in FIGS. 14 and 15, the position at which the arm 70 is rotated to a position where the center of the pin 73 is slightly beyond the straight line connecting the center of the rotating shaft 69 and the center of the pin 74 of the slider 72. Since the stopper 97 is provided at the position, the force of the spring 91 shown in FIG. 9 acts in the direction in which the pin 73 is pressed against the stopper 97, and the position of the arm 70 and the parts related thereto are stably held. You can

(12) Since the elastic protrusion 98 is provided as shown in FIG. 15,
The pin 73 enters between this tip and the stopper 97,
73 is stably held, and the completion of the operation of the operation lever 68 can be reliably known by the feel of the hand and the sound.

(13) The reel motors 27 and 28, the reel shafts 29 and 30, and the guide pins 31 and 32 are placed on the support substrate 26 to integrally configure the tape running device 25, and all of them are similarly moved up and down. Since it is configured as described above, the configuration of the tape traveling device 25 can be simplified.

[Modification] The present invention is not limited to the above-described embodiments, and the following modifications are possible, for example.

(1) It is also applicable to a system having a capstan and a pinch roller to run the magnetic tape 9.

(2) In order to reduce the amount of protrusion of the operating lever 68, a recess may be provided in the front plate 33 and a part or all of the operating lever 68 may be embedded therein.

(3) The carriage 42 may be formed in a box shape that accommodates the tape cassette 1. Alternatively, the carriage 42 may be arranged below the tape cassette 1.

EFFECTS OF THE INVENTION As is apparent from the above, according to the present invention, the reel shaft is engaged with the hub of the tape cassette by the operation of the operating member, so that the reel shaft moving mechanism can be simplified. In addition, the movement of the reel shaft when the cleaning cassette is inserted can be prevented from occurring. Therefore,
The reel shaft will not collide with the cleaning cassette and be damaged.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of a magnetic tape device according to an embodiment of the present invention, and FIG. 2 is a plan view showing a state in which a carriage is removed from the magnetic tape device shown in FIG. 3 is a plan view showing a state in which a tape cassette is loaded in the magnetic tape device, FIG. 4 is a front view of the magnetic tape device in the state of FIG. 2, and FIG. 5 is a magnetic tape device in the state of FIG. 6 is a front view of the magnetic tape device after the reel shaft is raised, and FIG. 7 shows a state in which the tape cassette and the file protector mechanism are removed from FIG. 2 and a part of the substrate is cut away. FIG. 8 is a plan view showing a state in which the tape cassette and the file protector mechanism are removed from FIG. 3 and a part of the substrate is cut away from FIG. 3, and FIG. 9 is a diagram showing the magnetic tape device of FIG. Remove the part FIG. 10 is a plan view showing the tape running device on the lower side of the substrate and the lifting mechanism, FIG. 10 is a sectional view showing a part of line XX of FIG. 1, and FIG. 11 is one of the lines XI-XI of FIG. FIG. 12 is a rear view showing the state before loading the cassette, as seen from the XII-XII line in FIG. 9 of the lifting mechanism of the tape running device, and FIG. 13 shows the same part as FIG. FIG. 14 is a rear view showing a state where the cassette is completely loaded, FIG. 14 is a rear view showing the same portion as FIG. 12 with the reel shaft raised, and FIG. 15 shows a part of the line XV-XV in FIG. A sectional view, FIG. 16 is a plan view of the tape cassette, and FIG. 17 is a front view of the tape cassette. 1 ... tape cassette, 9 ... magnetic tape, 10,11 ...
Hub, 21 ... Case, 22 ... Substrate, 23 ... Magnetic head,
25: Tape traveling device, 26: Support substrate, 27, 28 ... Reel motor, 29, 30 ... Reel shaft, 31, 32 ... Guide pin, 33 ... Front plate, 34 ... Cassette attachment / detachment opening , 35 ……
First virtual straight line, 37 ... Second virtual straight line, 42 ... Carriage, 43 ... Cassette pressing pin, 44 ... Loading lever, 46 ... Sliding plate, 47 ... Loading coil spring, 48 ... ... Control rotation plate, 56 ... Sub-board, 68 ... Operating lever, 69 ... Rotary axis, 70 ... Arm, 71 ... Coupling rod, 72 ...
…Slider.

Claims (1)

[Claims] 1. A magnetic tape, a pair of hubs around which the tape is wound, and a cassette half for accommodating the tape and the pair of hubs. The cassette half exposes the pair of main surfaces and the magnetic tape. For exchanging signals using a magnetic tape cassette having a front surface having an opening for inserting a head, a back surface facing the front surface, and a pair of side surfaces, wherein the tape cassette has one flat surface. Second on top first position
And a tape cassette attaching / detaching opening on the plane, and the center of the first position is orthogonal to each other on the plane. Is set on the intersection of the virtual straight lines, the center of the second position is set on the second virtual straight line slightly apart from the intersection, and the tape cassette attachment / detachment opening is set on the first virtual straight line. A case set above, a signal conversion magnetic head attached to the case so as to contact the magnetic tape through the head insertion opening when the tape cassette is placed in the second position, In response to the tape cassette being inserted to the first position along the first imaginary straight line through the tape cassette attaching / detaching opening, the tape cassette is moved to the first position. To a second position, a tape moving device including a pair of reel shafts for engaging with the hub of the tape cassette placed in the second position, and the reel. A reel for moving the shaft from a hub separation position to a hub engagement position for engaging the hub of the tape cassette placed in the second position, and for moving the shaft from the hub engagement position to the hub separation position. A cassette-type magnetic tape device comprising: a shaft moving mechanism; and an operating member for manually operating the reel shaft moving mechanism.