JPH02289964A - Cassette type magnetic tape device - Google Patents

Abstract

PURPOSE:To prevent malfunction of the subject device by providing a means for controlling a tape traveling device moving means to return a tape traveling device to a hub separating position when a moving signal from a tape traveling device moving detector cannot be obtained in spite of a moving command given from a moving commanding means. CONSTITUTION:The command for moving the tape traveling device 25 from the hub separating position for reel driving shafts 29 and 30 and hubs 10 and 11 to a hub engaging position is issued by the moving commanding means (cassette inserting detecting switch) 112. The tape traveling device moving detector (traveling device rising detection switch) 113 is disposed between the hub separating position of the tape traveling device 25 and the hub engaging position of same correspondingly, so as to detect whether the tape traveling device 25 is moved from the hub separating position to the hub engaging position. Then, a control means 76 is connected to the moving commanding means 112 and the tape traveling device moving detector 113 to control the tape traveling device moving means 67, 73, 83-86 in such a way that the tape traveling device 25 is brought back to the hub separating position when a moving signal from the tape traveling device moving detector 113 can not be obtained in spite of the moving command given from the moving commanding means 112. By this method, the continuation of malfunction cannot be generated.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a cassette-type magnetic tape device for recording and/or reproducing information, and more particularly, to a cassette-type magnetic tape device suitable for recording and/or reproducing digital signals. This invention relates to a magnetic tape device.

[Prior Art] In a magnetic tape device, the relative positional relationship between a magnetic head and a magnetic tape must be set accurately. A typical magnetic tape device is configured such that after a magnetic tape cassette is transported to a predetermined position, a magnetic head is moved to contact the magnetic tape and start recording or playback.

In other words, conventional magnetic disk drives are constructed so that both the tape cassette and the magnetic head are moved.

Therefore, there is a drawback that it is difficult to accurately set the relative position σ relationship between the magnetic latch and the magnetic tape.

In order to solve this kind of drawback, the magnetic head is substantially fixed, and the tape force set 1 is moved in one plane from this attachment/detachment opening to the position facing the magnetic head (data conversion position), and the reel is driven. Japanese Patent Laid-Open Publication No. 60-85454 discloses a magnetic tape device having a shaft fitted to a hub of a tape cassette.

[Problems to be Solved by the Invention] The magnetic tape device disclosed herein is such that when a tape cassette is inserted into the magnetic tape device, the cassette is moved to a data conversion position by the force of a spring, and the reel drive shaft is engaged with the hub by the force of the spring, and when the eject operator is manually operated, the reel drive shaft is separated from the hub and the tape force is set 1. There is.

Therefore, the mechanical configuration has become complex. In addition, even if an abnormally shaped object such as a non-conforming force is mistakenly inserted into the cassette/insertion section, the reel drive shaft will rise, resulting in a delay in determining whether it is an abnormally shaped object.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cassette-type magnetic tape device that can immediately determine whether a foreign object has been inserted.

[Means for Solving the Problems] To achieve the above object, the present invention comprises a magnetic tape, a pair of hubs around which the tape is wound, and cassettes 1 to 1/2 that accommodate the tape and the pair of hubs. The cassette half has a pair of main surfaces, a front surface having a head insertion opening for exposing the magnetic tape, a back surface opposite to the front surface, and a pair of side surfaces. a cassette type magnetic tape device for converting data, a gate having an opening for inserting the tape cassette; a cassette moving means for moving the tape cassette inserted into the case to a predetermined data conversion position; A magnetic head for signal conversion is placed in the case so as to come into contact with the magnetic tape through the head insertion opening of the tape cassette placed in the data conversion position by the cassette moving means; A pair of reels 1 to be engaged with the hub of the tape cassette that has been opened! ! A tape running device including a K moving shaft, a hub engagement position where the reel drive shaft engages with the hub of the tape force set 1 to placed at the data conversion position, and a hub separation position where the reel drive shaft is spaced apart from the hub. a tape running device moving means for moving the tape running device so that the tape running device can be moved from the hub to the hub engaging position; , is arranged between the hub separation position and the hub engagement position of the tape running device, and detects whether the tape running device has moved from the hub separation position to the hub engagement position. a tape traveling device movement detector connected to the movement commanding means and the Dave traveling device movement detector, the tape traveling device movement detector being connected to the movement commanding means and the Dave traveling device movement detector, even though a movement command is given from the movement commanding means; The present invention relates to a cassette type magnetic tape device comprising a control means for controlling the tape traveling device moving means so as to return the tape traveling device to the hub separation position when a signal indicating movement is not obtained from the hub.

It is preferable that the tape traveling device movement detector doubles as the rise detection switch 113 as shown in the embodiment, but is not limited to this, and can be independently positioned at any position between the hub separation position and the hub engagement position A detection switch or a detector (such as an optical sensor) may be arranged.

Further, although it is desirable that the movement command means also serves as the cassette/insertion detection switch 112 of the embodiment, it may be provided independently.

Further, as shown in the embodiment, the tape running device moving means includes a motor 73, a cam 67 coupled to the motor 73 so as to be rotated by the motor 73, and a follower driven by the cam 67. A lever 84 is provided at one end and is formed to rotate in response to the rotation of the cam, and the tape force set 1 is inserted into the data conversion position in response to the rotation of the lever 84. a linear moving member 83 connected to the other end of the lever 84 so as to be capable of linear movement in a direction parallel to the main surface of the lever 84;
a motion direction converter elliptical for converting the linear motion of the linear moving member 83 in a direction parallel to the main surface of the tape cassette 1 into the axial motion of the two reel drive shafts 30 of the tape traveling device 25; and a spring 86 for applying a force to the linear moving member 83 in the direction of moving the tape traveling device 25 toward the hub engaging position, the cam surface of which the follower of the cam 67 comes into contact. 70 for limiting the rotational position of the lever 84 so that the tape traveling device 25 is held in the hub engaging position; and a region for moving the tape traveling device 25 from the hub engaging position to the hub separating position. a region 70b for driving the lever 84 to move the lever 84; a region 70c for restricting the rotational position of the lever 84 so as to keep the tape traveling device 25 at the hub-separated position; a region 7 that limits the rotational position of the lever 84 to allow the lever 84 to move from the hub separation position to the hub engagement position;
0a is desirable.

It is preferable that the control means uses a cam 67 as shown in the embodiment, and that the motor 73 of the cam 67 is controlled by a control circuit 76.

However, it is also possible to provide a timer that responds to a movement command, use this timer to know when a predetermined time has elapsed since the movement command, and return the tape transport device to the hub separation position when no movement of the tape transport device is detected within the predetermined time. .

[Function] In the magnetic tape device of the present invention, a predetermined movement of the tape traveling device movement detector is not detected even though the movement command means generates a movement command of the tape traveling device in the reel drive axis direction. In this case, the tape transport device is returned to the hub separation position (original position). Therefore, the continuation of the incorrect operation does not occur.

Incidentally, when the cam 67 is used as shown in the embodiment, the irregularly shaped objects are ejected as the cam 67 continues to rotate.

This makes it possible to move smoothly along the cam surface.

According to the third aspect of the invention, since the cam is always at the reference angle position when the power is turned on, the tape can be quickly inserted into the tape cassette /1. Further, it is possible to prevent an erroneous operation such as inserting a tape cassette while the reel drive shaft is in the hub engagement position.

[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 force set 1~] The tape force set used in this magnetic tape device)・1 is as follows:
As shown in FIGS. 2 and 3, one main surface (surface) 2,
Inside the cassette half (gate) 8, which has the other main surface (back surface) 3 opposite to this, a front surface 4, a rear surface 5 opposite to this, a first side surface 6, and a second side surface 7 opposite to this. , a magnetic tag 9, and first and second reels or hubs 10.
, 11. A pair of haps 10, 11
is rotatably arranged between the front surface 2 and the back surface 3 of the half 8, and the reel shaft insertion hole 1 is provided in the front surface 2 and the back surface 3.
2, 13, guide pin insertion holes 14, 15, a capstan is inserted in a conventional tape recorder, but in this embodiment, instead of this, the guide pin insertion holes 14, 15 are inserted into the tape start end (B O "I") and tape end @ ( Five openings 17 or windows are provided in the front surface 4 of the six-cassette housing 78, which has a pair of holes 16 into which light-emitting elements for detecting EOT are inserted.

[Magnetic Head] As shown in FIG. 1, the cassette-type magnetic tape device 20 has a magnetic head 23 housed on a fixed substrate 22 of a case (container) 21. This magnetic head 23 contacts the magnetic tape 9 of the tape cassette 1 to record and reproduce data. The magnetic head 23 cannot be moved in a direction perpendicular to the signal conversion gap surface 24, but the head movement I! (not shown) in the track width direction is impossible. The magnetic head 23 is moved by a rack switching mechanism (track switching am>).
It is constructed based on the same principle as that disclosed in Japanese Patent No.-85454.

[Tape Running Device] The magnetic tape device 20 has a tape 5L row device 25 shown in FIG. This tape running device 25 includes a fixed substrate 2
A pair of reel motors 27, 28, a pair of reel drive shafts 30, and a pair of guide pins 31, 32 are arranged on a support substrate 26 parallel to the reel motor 2. A pair of two reel drive shafts 30 are directly connected to a pair of reel motors 27 and 28 and extend in a direction perpendicular to the support substrate 26. A pair of guide pins 31 and 32 also extend in a direction perpendicular to the support substrate 26. The tape running device 25 is not fixedly arranged in the case 21, and has two reel drive shafts and a hub separation position where the tape cassettes 1 and 1 are spaced apart from each other, and a 19th reel drive shaft as shown in FIG.
As shown in the figure, the reel drive shafts 29 and 30 are configured to move between a hub engagement position where the tape cassette 1 is inserted. The moving machine components of the tape running device 25 will be explained in detail later. Note that this tape running device does not include a cag stan and a pinch roller. At this time, the speed of the tape 9 is detected by a tape speed detection port (not shown), and the reel motors 27 and 28 are controlled.

1 case" Front plate 3 of the gauge 21 for housing and attaching each part
3 is provided with a cassette attachment/detachment opening ``j34'' as shown in FIG.
As is clear from the figure, the tape cassette 1 is inserted so as to have a directionality that corresponds to a straight line connecting the pair of hubs 10 and 1. That is, the main board 2 of the case 21
A cassette attachment/detachment opening 34 is provided so that the tape cassette 1 can be inserted along a first imaginary straight line 35 drawn as shown in FIG. In addition, in tape cassette l-1, this front surface 2 and back surface 3 are the main board 22.
The tape force sets 1 to 1 are inserted parallel to the first position (insertion intermediate position) shown by the broken line 36 in FIG.
and the second position shown in FIG. The second position is the second position shown in FIG.
This is the position (data conversion position) to which the tape cassette 1 is moved along the virtual straight line 37. In Figure 5, the first
The intersection point 38 of the virtual straight line 35 and the second virtual straight line 37 is the substantial center of the tape force sets 1 to 1 in the first position (the midpoint between the reel hubs 10 and 11), and the tape cassette in the second position 1 is a point 37a slightly moved to the left along the second virtual straight line 37 from the intersection 38. As is clear from FIG. 6, the second position of the tape force sets 1-1 is the position where the magnetic head 1<<23 is in contact with the magnetic tape 9 of the tape cassette 1 (data conversion position).

In order to enable the tape cassette 1 to assume a first position and a second position, a case 21 is inserted as shown in FIG.
A stopper protrusion 39, a front positioning protrusion 40, and a rear guide protrusion 41 are provided on the main board 22''. Insert the tape cassette 1 by hand along the first imaginary straight line 35 in FIG. Take. Thereafter, the cassette is moved along the second virtual straight line 37 by the cassette moving mechanism, and the sixth
As shown, the front surface 4 abuts the full positioning projection 40 and assumes the second position. The stopper protrusion 39 is provided to prevent the tape cassette 1 from being inserted along the first imaginary straight line 35 more than necessary.

[Cassette moving machine top] The cassette moving R top includes a cassette carriage 42, which can also be called a cassette guide, a cassette holder, or a cassette guide, shown in FIGS. 1, 7, and 8, and a cassette carriage 42 shown in FIGS. and a cassette pressing bottle 43 rotatably connected to one end of the carriage 42 as shown in FIG. 8 etc., and a cassette pressing bottle 43 as shown in FIGS. A pin 4 is attached to the cassette moving lever 44 having a rotating arm structure as shown in FIGS. 1, 5, 6, and 8.
5, a coil spring 47 for cassette insertion that applies a biasing force to the right in FIG. 5 to the sliding plate 46, and a control rotation for controlling the operation of the sliding plate 46. plate 48.

To explain each part of the cassette moving mechanism in more detail, as shown in FIG. Connecting shaft portion 43b to through hole 49
A screw 50 is screwed into the screw hole of the connecting shaft portion 43b into which the connecting shaft portion 43b is rotatably inserted, and the head of the screw 50 prevents the carriage 42 from coming off.

The carriage 42 moves only in the left-right direction in FIGS. 1 and 9 (in the direction of the second imaginary straight line 37 in FIG. 5).

In order to achieve stable movement in this direction, the carriage 4
Two protrusions 51 are provided on the left end side of FIG. The pin 53 is supported by a bottle support 54 fixed to the main substrate 22, as shown in FIG. Guide eraser 52 is the fifth
Since it extends parallel to the second imaginary straight line 37 in the figure, the carriage 42 moves in the direction of the second imaginary straight line 37. Note that a pair of falling portions 42a are provided in order to move the cassettes 1 to 1 to the right together with the carriage 42.

As shown in FIG.
It is rotatably supported by a shaft 57 implanted in a sub-board 56 which is fixed at. A pin 45 is implanted at the other end of this cassette moving lever 44, and this pin 45 is inserted into a hole 46a of a sliding plate 46 as shown in FIG. Since the pin 45 is inserted into the hole 46a with a margin,
The cassette moving lever 44 can be freely rotated.

As shown in FIG. 5, two long guide holes 58a and 58b extending parallel to the second imaginary straight line 37 are formed in the sliding plate 46 that slides on the main board 22. A fixing pin 59a259b implanted in is inserted.

Therefore, the sliding plate 46 slides only in the direction parallel to the second imaginary straight line 37.

One end of the cassette insertion coil spring 47 is locked to the sliding plate 46, and the other end is a spring locking projection 6 provided on the main board 22.
It is locked at 0. Therefore, the sliding plate 46 is moved to the right in FIG. 5 by the spring 47 (the direction in which the cassette 1 is moved to the left).
is energized by

The control concave plate 48 is rotatably supported by a fixed pin 59a. A cassette engaging portion 61 is provided at one end of this control rotating plate 48, and this fl! ! A coil spring 62 is provided between the end and the locking projection 60, and a fifth
In the figure, a clockwise forward force is always applied. A pin 64 implanted in the sliding plate 46 is inserted into a hole 63 having a cam surface of the control rotation plate 48 . The hole 63 has a pin 64
It has a surface 65 that prevents the bin 64 from moving to the right, and a linear portion 66 that prevents the bin 64 from moving to the right. Since the fan-shaped blocking surface 65 is an arcuate surface centered on the pin 59a, it prevents the pin 64 from moving to the right while the pin 64 is in contact therewith.

A cam 67 is provided to drive and control the cassette moving lever 44. This cam 67 is shown in FIG.
As shown in FIGS.
The shaft 68 is rotatably supported by a shaft 68 implanted in the shaft 68. This cam 67 has a first main surface shown in FIG.
The cam 67 has a second cam surface 69 on its other main surface (lower surface) as shown in FIG. is established,
It is connected to a cam motor 73 via eight gears 72.

The first cam surface 69 rotates the cassette moving lever 44 in the cassette ejecting direction, and is provided here as a cam follower that projects downward from the cassette moving lever 44 as shown in FIGS. 8 and 12. The first cam engagement pin 74 of the first cam is in contact. A region 6 in which the radius from the center of the cam 67 gradually changes among the six first cam surfaces shown in FIG.
9a is a region for displacing the cassette moving lever 44 in the eject direction, and a region 69b having a larger radius from the cam center than this region 69a is a region for allowing the moving lever 44 to be displaced toward the cassette 1 in the cassette l/insertion direction. . 20th
P1 to P5 in the figure indicate the relative positional relationship between the cam 67 and the cam engagement pin 74 of the cassette moving lever 44. Is the cam engagement pin 74 only displaced in the left-right direction in FIG. 1?
In FIG. 20, the cam engagement pin 74 is shown as if it were moving the cam 69. The cam engagement pin 74 is the first
When the cam surface 69 is at the first position P1, the cassette 1 and the top of the mobile device are movable in response to insertion of the tape cassette 1. This magnetic tape device has a power-on detection circuit 75 as shown in FIG. 67 until the first position P1, that is, the initial position is obtained. In order to stop the cam 67 at the first position iP1, a reflective surface 77 for detecting a reference position made of reflective foil is placed on the lower surface of the cam 67 shown in FIG.
1. In addition, in order to detect the reflection light 77, a light emitting element 78 is used as shown in principle in FIG.
and an optical reference position detector 80 consisting of seven light-receiving elements.
is provided. This reference position detector 80 is connected to a control circuit 76 as shown in FIG. 23, and the cam motor 73 which is rotating in response to power-on is controlled to stop in response to a reference position detection signal. Note that the first position P1 in FIG. 20 is an angular position that allows the cam engagement pin 74 to move from the radial position at the end of the region 69a to the region 69b having a larger radius.

The second cam surface 70 on the lower surface side of the cam 67 is for controlling the movement of the tape traveling device 25, and will be explained later.

The inserted cassette 1 is ejected by cam 6.
7. In order to perform this cassette ejection, as shown in FIG.
is arranged on the front plate 33, and is connected to a control circuit 76 as shown in FIG.

Next, the operation of the cassette mobile device will be explained. When the power of the magnetic tape device is turned on, the cam motor 73 is driven in response to the signal indicating the power-on detection of the power-on detection circuit 75 as described above, and the cam motor 73 is driven to move the cam holding bin 74 or the cam 76 to the first position P1. Located in This first position P1 corresponds to the cassette moving lever 44 being in the cassette 1/opening 1~ state. In this state, insert tape cassette 1 into the first
When the tape cassette 1 is inserted along the virtual straight line 35 of
side surface 6 presses the cassette l-engaging portion 6J of the control rotation plate 48. Tape cassette l-. 1 is further inserted, the control rotation plate 48 rotates counterclockwise in FIG. 5 against the coil spring 62 for ejector 1. When the rotation of the control rotation plate 48 progresses due to the insertion of the tape cassette 1, the pin 64 passes the end of the blocking surface 65, the pin 64 is no longer blocked by the control rotation plate 48, and the pin 64 can freely move to the right. Then, the sliding plate 46 moves to the right as shown in FIG. 6 by the force of the cassette insertion coil spring 47. Due to this. The pin 45 of the cassette moving lever 44 is pressed by the sliding plate 46 and moves clockwise about the shaft 57 as shown in FIG. The back surface 5 is pressed to move the tape cassette 1 to the left along the second imaginary straight line 37. As a result, the tape cassette 1 is loaded in the second position shown in FIG. 6, and the magnetic head 23 comes into contact with the magnetic tape 9. Further, the positioning protrusion 40 comes into contact with the front part 4 of the tape cassette 1, and positioning in the direction of the second imaginary straight line 37 is achieved. The tape cassette 1 fits under the two cassette presser springs 82 and is held on the main board 22. Note that since the carriage 42 is connected to the cassette moving lever 44, it moves along the second imaginary straight line 37 together with the tape force set 1-1. Thereafter, the two reel drive shafts 30 are raised to engage the hubs 10 and 11, and the tape becomes ready for running.

After recording or playback is finished, press the eject I-switch 8.
1, the cam motor 73 starts rotating and the cam engagement pin 74 moves from the second position P2 to the third position shown in FIG.
, returns to the first position P1 via the fourth and fifth positions P3, P4, and P5. 2nd digit 3 F) 2 to 4th position P
Up to 4, the cassette moving lever 44 does not rotate because the cam 67 does not press the cam engagement bin 74, but the cam surface area 69a in the section from the fourth position P4 to the first position P1 where the radius gradually becomes smaller. Then, the cam retaining pin 74 is pushed to the left in FIG. 6, the cassette I-moving lever 44 is rotated counterclockwise, and the cassette I-1 is moved to the right in FIG. 6 together with the carriage 42. . When the concave movement of the cassette moving lever 44 in the counterclockwise direction is completed, the pin 6 of the sliding plate 46
4 out of the straight portion 66 of the control pivot plate 48, the control pivot plate 48 pivots as shown in FIG. 5, so that a portion of the cassette 1 protrudes from the opening 34.

[Tape Traveling Device Moving Mechanism] This magnetic tape device is configured such that the tape traveling device 25 moves to the data conversion position only while the cassette 1 is inserted. The tape running device moving means for carrying out this operation is shown in FIGS. 8, 9, and 15 to 19.
As shown in the figure, a tape traveling device moving member 83, a tape traveling device lowering lever 84, a lifting lever 85,
The rising spring 86 and the second cam 7 of the cam 67 mentioned above.
0 and a cam motor 73.

Among these, the components other than the cam motor 73 are rotation-to-linear conversion mechanisms for converting the rotational motion of the cam motor 73 into axial motion (linear motion) of the reel drive shafts 29 and 30.

As shown in FIG. 15, the tape traveling device moving member 83 has a portion 87 parallel to the fixed main board 22, and a pair of side portions 88 bent at right angles to this portion 87. , three guide parts 90 which are bent at right angles from the pair of side parts 88 and 89 and arranged parallel to part 87, and a part 91 which is bent at right angles from part 87. It is a member that moves linearly along the second imaginary straight line 37.

Eight side surfaces 88 of the movable member 83 are provided with three grooves 96 each having an inclined portion 93 and upper and lower horizontal portions 94 and 95 continuous thereto.

Note that two bowls 96 are provided on one side surface 88, and one groove 96 is provided on the other eight side surfaces. or,
The guide portions 90 and 91 are each provided with a long hole 97 extending parallel to the second imaginary straight line 37 shown in FIG. A bottle 98 implanted in the main board 22 is inserted into the elongated hole 97 as shown in FIG. Therefore, the moving member 8
3 is movable only in the direction of a second virtual straight line 37 shown in FIG.

In order to associate the moving member 83 with the support substrate 26 of the tape transport device 25, the support substrate 26 has a portion 99 parallel to the fixed main substrate 22 shown in FIG. 8, as shown in FIG. , and a pair of side surfaces 100 and 101 that are bent at right angles from this portion 99 and are arranged parallel to the side surface section 88 of the moving member 83. Two holes 102 are formed in the portion 99 of the support substrate 26;
A guide pin 103 that is implanted in the fixed main board 22 and extends downward from here is inserted).

Therefore, the support board 26 supporting the pair of reel drive shafts 30 and the pair of reel motors 27 and 28 moves only in the direction in which the reel drive shafts 29 and 30 extend (direction perpendicular to the main board 22). do. Support substrate 26 and moving member 83
In order to change the movement direction by engaging with the supporting substrate 2,
Two pins 104 are implanted in one side 100 of the 6, and one bottle 104 is implanted in the other side 101. Each bottle 104 projects perpendicularly outward from the side surfaces 100, 101 and is inserted into a groove 96 in the moving member 83. The slide 96 of the moving member 83 functions as a cam surface and converts movement of the moving member 83 in the direction of the imaginary straight line 37 in FIG. 5 into movement of the support substrate 26 in a direction perpendicular thereto.

A lifting lever 86 for raising the support substrate 26 of the tape traveling device 25 is connected to the connecting portion 92 of the moving member 83 by a pin 106 inserted into a long hole 105, as shown in FIGS. 16 and 17. connected. Although this "second raising lever 86" is not shown in FIG. 9, it is arranged above the lowering lever 84 as shown in FIGS. 16 and 17.

This lifting lever 85 is connected to the sub-board 5 as shown in FIG.
It is rotatably supported by a bottle 107 installed in 6. A lifting coil bypass 86 disposed between the tip of the lifting lever 85 and the sub-board 56 always biases the lifting lever 85 clockwise in FIGS. 16 and 17. That is, the lifting lever 85 always presses the moving member 83 in the left direction (in the direction toward the head). As shown in FIG. 9, one end of the lowering lever 84 is connected to a connecting portion 92 of the moving member 83 by a pin 106 inserted into an elongated hole 108, and the other end is a pin 109 as a cam follower implanted here. The second cam surface 70 on the lower side of the cam 67 is engaged by the second cam surface 70 . The lowering lever 84 is rotatably supported by a bottle 110 mounted on the sub-board 56, as shown in FIG.

The second cam surface 70 of the cam 67 moves from the first position P1 to the second position rl. as shown in FIG. a first region 70a in which the radius from the cam center at P2t gradually increases;
a second region 70b in which the radius gradually decreases from the second position lP2 to the third position P3;
to the first position I) 1, and a third region 70c having the smallest radius. In Fig. 21, the cam follower pin 10
Months of change in position of No. 9] are shown as 1 to P5. These positions correspond to positions P1 to P5 shown in FIG. 20.

That is, positions indicated by the same reference numerals in FIGS. 20 and 21 indicate the same angular position of the cam 67.

In response to power-on, cam follower pin 109 is positioned at the first position WP1 shown in FIG.

First position P1 from the cam center on the second cam surface 70
Since the radius up to cam 6 is small, pin 109 is connected to cam 6 in
It is near the center of 7. Therefore, the lower end side of the lowering lever 84 in FIG. 9 is located away from the head 23 (toward the right), and the moving member 83 is also located to the right as shown in FIGS. 9 and 17. The holding substrate 26 is at a low position as shown in FIG. Therefore, the reel drive shaft 29
, 30 are spaced apart from the hubs 10, 11.

Thereafter, when the cam 67 starts rotating clockwise in FIG. 21 (counterclockwise in FIG. 20), the radius of the cam 70 from the cam center gradually increases, so that the 9th rotation of the cam follower pin 109 Right movement in Figures and Figure 17 i.e. Leher 8/1
The clockwise rotation of the lever 85 becomes automatic, and the clockwise rotation of the lifting lever 85 is also enabled. As a result, the spring 86 rotates the lifting lever 85 clockwise, pushing the moving member 83 leftward in FIG. 17 to the position shown in FIG. 16. As a result, the bottle 104 comes out of the horizontal portion 96a of the groove 96, and the pin 104 is pressed by the inclined portion 96b of the dip 96. Since the inclined portion 96b is formed downward to the right in FIG.
The support substrate 26 integrated with 0/I is guided by the vertical guide pin 103 and ascends. After that, the 19th
As shown in the figure, a pin 104 is attached to the upper horizontal portion 96c of the groove 96.
enters, and the lifting of the support substrate 26 is stopped.

When the pin 104 of the support board 26 moves to the height shown in FIGS. 1-9, the motors 27, 28, supported by the support board 26,
Reel drive shafts 29, 30, guide pin 3]. ．． 32 also rises, and the two reel drive shafts 30 engage with the hubs 10 and 11 of the tape cassette 1 through the through holes 111 in FIG. 1 formed in the main board 22, and the guide pins 31 and 32 It enters the through holes 14 and 15 of the tape cassette 1 through the through hole (not shown) of the substrate 22. This makes it possible to run the tape 9.

From the hubs 10 and 11 of the cassette 1 to the reel drive shafts 29 and 3
When disengaging 0, the cam 67 is turned so that the cam engagement pin 109 moves from the second position P2 to the third position iP3 in FIG. In the region 70b of the cam surface 70, the radius gradually becomes smaller, so that the cam follower pin 109 or the cam 6
7 gradually pushes leftward in FIG. 16, the lowering lever 84 turns counterclockwise, and the moving member 83 moves to the 16th
By sliding rightward in the figure, the support substrate 26 of the tape traveling device returns from the raised position of FIG. 19 to the lowered position of FIG. 18.

Operation Timing] The timing relationship between the insertion and ejection of the trays 1 to 1 and the lifting and lowering of the tape traveling device 25 is set using a common cam 67,
Cassette insertion detection switch 11 shown in FIGS. 6 and 8
2, and a tape traveling device rise detection switch 1 shown in FIG.
13, the power-on detection switch 75, the reference position detector 80, and the eject switch 81 described above. The cassette 1 to insertion detection switch 112 are arranged at positions where they can be operated by pins 114 implanted in the cassette 1 to movement lever 44, and are fixed to the sub-board 56. The tape traveling device elevation detection switch 113 is fixed to the lower side of the main board 22 and is placed in a position where it is suppressed by a portion of the holding board 26 of the tape traveling device 25.

Both the cassette 1 to insertion detection switch 112 and the traveling device L elevation detection switch 113 are connected to the control circuit 76 as shown in FIG. 23, and are involved in the control of the cam motor 73.

Next, the operation timing of each part will be explained with reference to FIG. 24. If you turn on this device at some point,
A signal indicating power on is applied from the power on detection circuit 75 to the control circuit 76, and the rotation of the cam motor 73 is started.

When the reference position detector 80 detects the reference position P1 of the cam 67 at time t1 in FIG. 24, the rotation of the cam motor 73 is stopped.

Note that if the cam 67 is at the reference position P1 when the power is turned on,
Cam motor 73 does not rotate.

After turning on the power, just before time t2, move cassette 1 to case 2.
0 through the opening 34, and at the time t2, the dashed line 36 in FIG.
When reaching the first position shown by , the restriction of the bin 64 by the control rotation plate 48 is released, so the cassette moving lever 44 rapidly rotates by the force of the spring 47, and the cam engages at time t3. The pin 74 moves to the large radius area 69b of the first cam 69 as shown in FIG. The position after this movement is the same angular position as the first position P1, so it is indicated by P1a in FIG. In this example, cassette 1
The six regions 69b of the first cam surface are set so that the insertion of the cassette 1 stops slightly before the final insertion position. When the cassette 1 is inserted into the force set 1 a little before the final insertion position by moving the cam engagement pin from P1 to P1a, the cassette 1 is inserted as shown in FIG. 24(B).
~The insertion detection switch 112 is turned on, and in response, the cam motor 73 starts rotating as shown in FIG. 24(E). Therefore, the cassette 1 to the insertion detection switch 112
also functions as a movement command means for commanding the tape traveling device 25 to move to the hub engagement position. When the cam 67 is rotated counterclockwise in FIG. 20 and clockwise in FIG. 21 by the cam motor 73, the second cam follower pin 109 moves from the first position P1 to the second position f in FIG.
Move to iP2. As a result, the reel drive shaft 29
, 30, the tape running device 25 is raised. Since the cassettes 1 and 1 are not fixed at the final position while the reel drive shafts 29 and 30 are being raised, when inserting the reel drive shafts 29 and 30 into the hubs 10 and 11, the hubs 10 and 11 and the cassettes 1~ It is a mobile town, and the engagement between the two can be established relatively smoothly.

At time t4, the second cam driven bin 109 moves to the second position in FIG.
When the position reaches WP2 and the raising of the two reel drive shafts 30 is completed, the raising detection switch 113 is turned on as shown in FIG. 24(D), and in response, the cam motor 73 is turned on.
rotation stops.

At times 1 and 4, the first cam driven pin 74 has reached the second position P2 in FIG.
b, so the restriction by the cam surface 69 is released,
The cassette 1 to moving lever 44 move to the fully inserted position of the cassette 1. Note that at the time the cassette insertion detection switch 112 is turned on, the reel drive shafts 29 and 3 have already been turned on.
The insertion of the cassette 1 has been completed to a position where it can be inserted into the hubs 1o and 11. The cassette insertion detection switch 112 turns on before the cassette 1 is fully inserted, but since this actuating piece has spring properties, the cassette insertion detection switch 112 does not turn on even when the cassette 1 is fully inserted. 114, it can be turned on normally. The reel motors 27 and 28 are connected to the rise detection switch 11
3 detects the rise of the reel drive shafts 29 and 30 t4
Since rotation starts from the cassette, recording and reproducing of data can be started immediately after loading the cassette.

When the ejector 1 to the switch 81 are turned on as shown in FIG. 24(G) at time 5 after recording and reproducing data, the reel motors 27 and 28 are controlled to stop as shown in FIG. 24(C). At the same time, the cam motor 73 rotates as shown in FIG. 24(E).

This causes the second cam surface 70 of the cam 67 to
The driven bin 109 moves from the second position iP2 to the third position P3.
and move to the second driven bin 1. 09 is pressed toward the center of the cam 67, and the traveling device 25 including the two reel drive shafts 30 descends. Even if the rotation of the cam 67 starts at time t5, the ejecting operation of the cassette 1 does not occur immediately.

That is, until the lowering operation of the reel drive shafts 29, 30 is completed, the first driven pin 74 is in the first position as shown in FIG.
Since the cassette moving lever 44 is not restricted by the cam surface 69, the cassette moving lever 44 maintains the insertion position. When the first driven pin 74 reaches the fourth position P4 of the six first cam surfaces at time 76, the first driven pin 74 is gradually pressed toward the cam center, and the cassette 1 to the moving lever 44 are moved. It rotates counterclockwise and the ejection operation of the cassette 1 begins. When the ejection operation of the cassette 1 starts, the cassette insertion detection switch 112 is activated at time t7.
Thereafter, the reference position P1 is detected at time points 1 and 8 as shown in FIG. 24(F), and in response to this, the cam motor 73 is controlled to stop.

The reel drive shaft 29 from the opening 34 of this magnetic tape device,
If a cassette-like object or a foreign object that prevents the rise of 30 is inserted by mistake, the rise detection switch 113
does not turn on. Therefore, the stop control of the cam motor 73 based on the output of the second rise detection switch 113 is not executed, and the cam motor 73 and the cam 67 continue to rotate. As a result, if the reel drive shafts 29, 30 have been raised halfway, the reel drive shafts 29, 30 are returned to the lowered position by the P2-P3 region 70b in FIG. Further, the first driven pin 74 is pressed by the six regions 69a of the first cam surface shown in FIG. 20, and the cassette moving lever 44 reaches the cassette ejection position shown in FIG. is discharged.

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

(1) It is also applicable to a system in which the magnetic tape 9 is moved by having a cag stan and a vinyl roller.

(2) The carriage 42 may be formed into a box shape that accommodates the tape cassettes 1 to 1. Alternatively, the carriage 42 may be arranged below the tape cassette 1.

(3) Six first cam surfaces for controlling the movement of the cassette 1 are provided on one surface of the cam 67, and a second cam surface 70 for moving (elevating and lowering) the tape traveling device 25 is provided on the other surface. Although it is useful to simplify configuration,
If necessary, the first and second cams 70 may be provided on separate cams.

(4) A switch for detecting whether or not the lifting operation of the reel drive shafts 29 and 30 has started may be provided separately from the lifting completion detection switch 113.

(5) The cassette insertion detection switch 112 and the cassette insertion detection switch 113 may be replaced with a position detector such as an optical sensor.

(6) Instead of raising and lowering the entire tape running device 25, only a portion including the reel drive shafts 29 and 3o may be raised and lowered.

(7) Thes traveling device 25 is controlled by the second cam surface 70.
The cam 67 may be configured to both raise and lower. Further, the cam 67 may be configured so that the cassette 1 is both inserted and ejected using the six first cam surfaces.

[Effects of the Invention] As described above, according to the present invention, it is possible to prohibit the continuation of the operation of engaging the reel drive shaft with the hub while the irregularly shaped object is inserted into the tape cassette insertion portion.

[Brief explanation of the drawing]

1 is a partially omitted plan view of a magnetic tape device according to an embodiment of the present invention, FIG. 2 is a plan view of a tape cassette used in the magnetic tape device of FIG. 1, and FIG. 3 is a plan view of a tape cassette used in the magnetic tape device of FIG. 2 is a left side view of the tape cassette, FIG. 4 is a front view of the magnetic tape device shown in FIG. 1, and FIG. FIG. 6 is a plan view showing a state in which a part of the tape force set 1~ is inserted into the IfH opening of the gate in the same state as in FIG. 7 is a sectional view showing a part of the VU-VN line of the magnetic tape device in FIG. 1, FIG. 8 is a sectional view showing a part of the magnetic tape device in FIG. FIG. 9 is a plan view of the magnetic tape device shown in FIG. 1 with the upper part removed from the board, showing in particular the tape running device and a side part of the elevator, and FIG. 10 shows the control concave plate shown in FIG. 1. Plan, 1st 1
The figure is a 511 side view showing the sliding plate in Figure 1, and Figure 12 is a 511 side view showing the sliding plate in Figure 1.
Figure cassette l ~ side view showing the moving lever, ? Fig. 13 is a plan view of the cassette moving lever shown in Fig. 12, Fig. 14 is a perspective view schematically showing the cam of Fig. 1 and its drive mechanism, and Fig. 15 is a moving member of the tape traveling device of Fig. 9. FIG. 16 is a plan view showing the moving member in FIG. 9, the lowering lever, and the machine ellipse connected to these with the lifting lever in the tape running device raised state; FIG. 17 is the same as FIG. 16. 18 is a plan view showing the same top of the magnetic tape in the state below the tape running device.
Figure 19 is a view showing the tape traveling device support board raised in the same way as Figure 18; Figure 20 is a plan view showing the cam in Figure 1; Figure 21 is a plan view of the cam in Figure 1;
Figure 22 is a cross-sectional view of the cam in Figure 20 taken along line XX■-XX■ Figure 23 is a control circuit diagram of the cam motor and reel motor Figure 24 is the operation of each part of the magnetic tape device FIG. 3 is a diagram showing timing. 1...Tape force set 1~, 9...Magnetic tape, 10
゛11...Hub, 21...Case, 22...Main board, 23...Magnetic head, 25...Tape running device,
26...Support board, 27.28...Reel motor,
29.30...Reel drive shaft, 34...Cassette attachment/detachment opening, 35...First imaginary straight line, 37...Second
virtual straight line, 42... Carriage, 44... Cassette 1/movement lever, 46... Sliding plate, 47... Coil spring for cassette insertion, 48... Control rotating plate, 56...
・Subboard, 67...Cam, 69...First cam surface, 70...Second cam surface, 73...Cam motor, 7
5... Power on detection circuit, 83... Tape traveling device moving member, 84... Tape traveling device lowering lever, 8
5...] Two lifting levers, 86... Lifting springs, 11
2...Cassette insertion detection switch, 113...Tape traveling device rise detection switch.

Claims (1)

[Scope of Claims] [1] Consisting of a magnetic tape, a pair of hubs around which the tape is wound, and a cassette half that accommodates the tape and the pair of hubs, the cassette half has a pair of main surfaces and a magnetic field. In a cassette-type magnetic tape device that converts signals using a magnetic tape cassette, the tape cassette has a front surface having a head insertion opening for exposing the tape, a back surface opposite to the front surface, and a pair of side surfaces. a case having an opening for inserting the tape cassette; cassette moving means for moving the tape cassette inserted into the case to a predetermined data conversion position; and a tape cassette placed at the data conversion position by the cassette movement means. a signal conversion magnetic head disposed within the case so as to contact the magnetic tape through the head insertion opening of the tape cassette; and a magnetic head for engaging with the hub of the tape cassette placed at the data conversion position. a tape running device including a pair of reel drive shafts; a hub engagement position where the reel drive shaft engages with the hub of the tape cassette placed at the data conversion position; and a hub separation position where the reel drive shaft is spaced apart from the hub. tape traveling device moving means for moving the tape traveling device so that the tape traveling device can be moved from the hub to the hub engaging position; disposed correspondingly between the hub separation position and the hub engagement position of the tape running device, and for detecting whether the tape running device has moved from the hub separation position to the hub engagement position. a tape traveling device movement detector; connected to the movement commanding means and the tape traveling device movement detector; and the tape traveling device movement detector connects to the movement command means and the tape traveling device movement detector, and the tape traveling device moves from the tape traveling device movement detector even though a movement command is given from the movement commanding means. a cassette type magnetic tape device comprising: control means for controlling said tape traveling device moving means so as to return said tape traveling device to said hub-separated position when a signal indicating the above is not obtained.