JPH0814908B2 - 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, the tape cassette is moved in a plane from the opening for attachment / detachment to the magnetic head facing position (data conversion position), and the reel drive shaft is moved to the tape cassette. Japanese Patent Application Laid-Open No. 60-85454 discloses a magnetic tape device configured to be engaged with the hub.

[Problems to be Solved by the Invention] In the magnetic tape device disclosed herein, when a tape cassette is inserted into the magnetic tape device, the cassette is moved to the data conversion position by the force of the spring, and the reel drive shaft is moved to the spring. When the force is engaged with the hub and the ejector is manually operated, the reel drive shaft is separated from the hub and the tape cassette is ejected.

Therefore, the mechanical structure becomes complicated. In order to simplify the mechanical structure, it is considered to form a moving mechanism so as to move the reel drive shaft from the hub separation position to the hub engagement position and vice versa by an electric drive device such as a motor or an electromagnetic plunger. To be However, when the reel drive shaft is configured to be electrically moved from the hub separation position to the hub engagement position, the reel drive shaft is restricted from rising to a predetermined position due to the insertion of a deformed object, and the electric drive device is If the ascending operation is continued, not only the load state continues, power loss and heat generation increase, but also the electric drive device may fail.

Therefore, it is an object of the present invention to provide a cassette type magnetic tape device which can solve the above problems.

[Means for Solving the Problems] The present invention for achieving the above object comprises a magnetic tape, a pair of hubs around which the magnetic tape is wound, and a cassette half that houses the magnetic 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 facing the front surface, and a pair of side surfaces for inserting the magnetic tape cassette. A case having an opening, a cassette moving means for moving the tape cassette inserted in the case to a predetermined data conversion position, and the head of the tape cassette moved to the data conversion position by the cassette moving means. A signal converting magnetic head arranged in the case so as to come into contact with the magnetic tape through an insertion opening; and the data. A tape running device including a pair of reel drive shafts for engaging with the hub of the tape cassette in the conversion position; and a hub of the tape cassette in which the reel drive shafts are in the data conversion position. A magnetic tape device comprising: a tape running device moving means for moving the tape running device so that a hub engaging position to be engaged and a hub separating position separated from the hub can be taken. , The tape moving device moving means includes at one end a motor, a cam coupled to the motor so as to be rotated by the motor, and a follower driven by the cam, and corresponding to the rotation of the cam. Parallel to the main surface of the tape cassette inserted at the data conversion position corresponding to the rotation of the lever. A linear movement member connected to the other end of the lever so that the linear movement of the tape can be performed in a direction parallel to the main surface of the tape cassette of the linear movement member. A motion direction conversion mechanism for converting the reel drive shaft into an axial motion, and a spring for applying a force in a direction for moving the tape running device toward the hub engaging position to the linear moving member. A cam surface of the cam with which the follower comes into contact, and a first area for enabling rotation of the lever so as to allow the tape running device to be located at the hub engaging position. A second region for driving the lever to move the tape running device from the hub engagement position to the hub spaced position; and to maintain the tape running device in the hub spaced position. A third region for restricting the turning position of the bar, and drives the lever so as to move the tape running device from the hub separating position to the hub engaging position during one rotation of the cam. A cassette-type magnetic tape device characterized by having no area to be used. Related to.

[Operation and Effect of the Invention] According to the present invention, the movement of the tape traveling device from the hub engagement position to the hub separation position and the holding of this position are achieved by the functions of the second and third regions of the cam surface. The movement of the tape running device from the hub engagement position to the hub separation position is achieved by the spring without being driven by the cam surface. Therefore, even if a deformed object (for example, a cleaning cassette) that prevents the reel drive shaft from rising is inserted, the cam and the cam motor are unrelated to the drive for raising the reel drive shaft, so that the load on the cam motor does not increase. .

[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 FIGS. 2 and 3, one main surface (front surface) 2,
Inside a cassette half (case) 8 having the other main surface (back surface) 3, a front surface 4, a back surface 5 facing the same, a first side surface 6 and a second side surface 7 facing the other main surface (back surface) 3 facing the same. , Magnetic tape 9 and first and second reels or hubs 1
It accommodates 0 and 11. The pair of hubs 10 and 11
The half 8 is rotatably arranged between the front surface 2 and the rear surface 3, and the reel shaft insertion holes 12, 1 are formed in the front surface 2 and the rear surface 3.
3, guide pin insertion holes 14 and 15, a capstan is inserted in a general tape recorder, but in this embodiment, instead of this, light emission for detecting the tape start end (BOT) and tape end (EOT) It has a pair of holes 16 into which elements are inserted.
The front surface 4 of the cassette half 8 is provided with five openings 17 or windows.

[Magnetic Head] The cassette type magnetic tape device 20 has a magnetic head 23 mounted on a fixed substrate 22 of a case (container) 21 as shown in FIG. 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 width 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 is the tape running device 25 shown in FIG.
Have. The tape running device 25 includes a pair of reel motors 27, 28, a pair of reel drive shafts 29, 30 and a pair of guide pins 31, 32 on a support substrate 26 parallel to the fixed substrate 22. It is configured. The pair of reel drive shafts 29, 30 are directly connected to the pair of reel motors 27, 28 and extend in a direction orthogonal to the support 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 not fixedly arranged in the case 21, and the reel drive shafts 29 and 30 are separated from the tape cassette 1 as shown in FIG. 18 and the reel separating position as shown in FIG. The drive shafts 29, 30 are configured to move between the drive shafts 29 and 30 and a hub engaging position inserted in the tape cassette 1. The moving mechanism of the tape running device 25 will be described in detail later. 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] Front plate 33 of case 21 for accommodating and mounting each part
As shown in FIG. 4, there is an opening 34 for cassette attachment / detachment. As is apparent from FIG. 5, the cassette attachment / detachment opening 34 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 cassette attachment / detachment opening 34 is formed so that the tape cassette 1 can be inserted along a first virtual straight line 35, which is written on the main board 22 of the case 21 as shown in FIG.
Is provided. The tape cassette 1 is inserted so that the front surface 2 and the back surface 3 are parallel to the main board 22,
The tape cassette 1 takes a first position (intermediate insertion position) shown by a broken line 36 in FIG. 5 and a second position shown in FIG. The second position is a position (data conversion position) where the tape cassette 1 is moved along a second virtual straight line 37 shown in FIG. 5 which is orthogonal to the first virtual straight line 35 on one plane. Fifth
In the figure, the intersection 38 of the first virtual line 35 and the second virtual 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 position. The center of the tape cassette 1 is a point 37a slightly moved to the left from the intersection 38 along the second virtual straight line 37. The second position of the tape cassette 1 is the position where the magnetic head 23 contacts the magnetic tape 9 of the tape cassette 1 (data conversion position), as is clear from FIG.

In order to allow the tape cassette 1 to assume the first position and the second position, a case 21 is provided as shown in FIG.
A stopper projection 39, a front surface positioning projection 40, and a rear guide projection 41 are provided on the main board 22. The tape cassette 1 is manually inserted along the first imaginary straight line 35 in FIG. 2, and when the side surface 6 of the tape cassette 1 reaches the vicinity of the stopper projection 39, the tape cassette 1 takes the first position. . After that, it is moved along the second imaginary straight line 37 by the cassette moving mechanism, and the front surface 4 abuts against the entire surface positioning protrusion 40 as shown in FIG. 6 to take the 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 also be referred to as a cassette guide, a cassette holder, or a cassette guide, shown in FIGS. 1, 7, and 8.
As shown in FIGS. 7, 7 and 8, a cassette pressing pin 43 rotatably connected to one end of a carriage 42,
As shown in FIG. 6, FIG. 7, FIG. 8, FIG. 12 and FIG. 13, a cassette moving lever 44 in which a pin 43 is planted, and FIG. 1, FIG. 5, FIG. As shown in FIG. 8 and the like, a sliding plate 46 connected to a cassette moving lever 44 having a rotating arm by a pin 45, and a cassette insertion which gives a biasing force to the sliding plate 46 in the right direction in FIG. And a control rotation plate 48 for controlling the movement of the sliding plate 46.

Each part of the cassette moving mechanism will be described in more detail. As shown in FIG. 9, the cassette pressing pin 43 is provided with an inverted truncated cone-shaped pressing portion 43a and a connecting shaft portion 43b, and is provided on the carriage 42. The connecting shaft portion 43b is rotatably inserted into the through hole 49 thus formed. 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. 5) in FIGS. 1 and 9.
Carriage 42 for stable movement in this direction
Two protrusions 51 are provided on the left end side in FIG. 1, guide grooves 52 are respectively formed therein as shown in FIG. 7, and guide pins 53 are inserted into the guide grooves 52. pin
53 is supported by a pin support 54 fixed to the main substrate 22 as shown in FIG. Since the guide groove 52 extends parallel to the second virtual straight line 37 in FIG. 5, the carriage 42 moves in the direction of the second virtual straight line 37. The carriage 42
Together with the pair of falling portions 42 for moving the cassette 1 to the right
a is provided.

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

As shown in FIG. 5, the sliding plate 46 that slides on the main board 22 is formed with two guide slots 58a and 58b extending parallel to the second virtual straight line 37. The fixing pins 59a and 59b implanted in the are inserted. Therefore, the sliding plate 46 slides only in the direction parallel to the second virtual straight line 37. One end of the cassette insertion coil spring 47 is locked to the sliding plate 46, and the other end is locked to a spring locking protrusion 60 provided on the main board 22. Therefore, the sliding plate 46 is biased by the spring 47 in the right direction (the direction in which the cassette 1 is moved to the left) in FIG.
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 and the locking projection 60. The control turning plate 48 is clockwise in FIG. The biasing power of is always given. 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 arc surface centering on 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. The cam 67 is arranged near the tip of the cassette moving lever 44 as shown in FIGS. 1, 5 and 6, and is attached to the shaft 68 planted in the sub-board 56 as shown in FIG. It is rotatably supported. This cam 67 has a first cam surface 69 shown in FIG. 20 on one main surface (upper surface) and a second cam surface 70 shown in FIG. 21 on the other main surface (lower surface).
Have. As shown in FIG. 14, rotation driving teeth 71 are provided on the outer peripheral surface of the cam 67, and are connected to a cam motor 73 via eight gears 72.

The first cam surface 69 is for rotating the cassette moving lever 44 in the cassette eject direction, and here, as a cam follower protruding downward from the cassette moving lever 44 as shown in FIGS. 8 and 12. The first cam engaging pin 74 of the above contacts. In the first cam surface 69 shown in FIG. 20, a region 69a in which the radius from the center of the cam 67 changes gradually is a region in which the cassette moving lever 44 is displaced in the eject direction,
A region 69b having a larger radius than the center of the cam than the region 69a is a region that allows the displacement of the cassette moving lever 44 in the cassette insertion direction. P1 to P5 in FIG. 20 show the relative positional relationship between the cam 67 and the cam engagement pin 74 of the cassette moving lever 44.
Although the cam engagement pin 74 is only displaced in the left-right direction in FIG. 1, it is shown in FIG. 20 as if the cam engagement pin 74 were moving on the cam surface 69. When the cam engagement pin 74 is at the first position P1 on the first cam surface 69, the cassette moving mechanism is operable in response to the insertion of the tape cassette 1. As shown in FIG. 23, this magnetic tape device has a power-on detection circuit 75, and when it is detected that the power supply of the device is turned on, the control circuit 76 responds by moving the cam motor 73 to the cam. Rotate so as to obtain the first position P1 of 67, that is, the initial position. In order to stop the cam 67 at the first position P1, a reference position detecting reflective surface 77 made of a reflective foil is provided on the lower surface of the cam 67 shown in FIG. 21 corresponding to the first position P1. Further, in order to detect the reflecting surface 77, an optical reference position detector 80 including a light emitting element 78 and a light receiving element 79 is provided as shown in principle in FIG. The reference position detector 80 is connected to the control circuit 76 as shown in FIG. 23, and the cam motor 73 which is rotating in response to the power-on is stopped and controlled in response to the reference position detection signal. 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 than this. The second cam surface 70 on the lower surface side of the cam 67
Is for controlling the movement of the tape running device 25, and will be described later.

The inserted cassette 1 is ejected by the cam.
Done by 67. In order to execute this cassette eject, an eject switch 81 is arranged on the front plate 33 as shown in FIG. 4 and is connected to the control circuit 76 as shown in FIG.

Next, the operation of the cassette moving mechanism will be described. 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 and the cam engagement pin 74 causes the cam engagement pin 74 to move to the first position P1 of the cam 76 as described above. Located in. The first position P1 corresponds to the cassette moving lever 44 in the cassette eject state. When the tape cassette 1 is inserted along the first virtual straight line 35 in this state, the side surface 6 of the tape cassette 1 presses the cassette engaging portion 61 of the control rotation plate 48. When the tape cassette 1 is further inserted, the control rotation plate 48 rotates counterclockwise in FIG. 5 against the ejection 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 is moved to the sixth position by the force of the cassette insertion coil spring 47.
Move to the right as shown. By this. The pin 45 of the cassette moving lever 44 is pressed by the sliding plate 46 and is rotated clockwise about the shaft 57 as shown in FIG. 6, and the pressing portion 43a of the cassette pressing pin 43 is moved to the tape cassette 1 Back 5
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. 6, and the magnetic head 23 contacts the magnetic tape 9. Further, the positioning protrusion 40 comes into contact with the front surface 4 of the tape cassette 1, and the positioning in the direction of the second virtual straight line 37 is achieved. The tape cassette 1 enters under the two cassette pressing springs 82 and is held on the main board 22. Since the carriage 42 is connected to the cassette moving lever 44, it moves together with the tape cassette 1 along the second virtual straight line 37. After that, the reel drive shaft 29,
30 moves up and engages with the hubs 10 and 11, and the tape can be run. When the eject switch 81 is pressed after the recording or reproduction is finished, the rotation of the cam motor 73 is started, and the cam engagement pin 74 moves from the second position P2 to the third, fourth and fifth positions shown in FIG. It returns to the first position P1 via P3, P4 and P5. The cassette moving lever 44 does not rotate from the second position P2 to the fourth position P4 because the cam 67 does not press the cam engagement pin 74, but the radius gradually decreases from the fourth position P4 to the first position. In the cam surface area 69a in the section of position P1 of FIG. 6, the cam engagement pin 74 is pushed leftward in FIG.
44 rotates counterclockwise to move the cassette 1 together with the carriage 42 to the right in FIG. Cassette moving lever
When the rotation of 44 in the counterclockwise direction is completed, the pin of the sliding plate 46
In order for 64 to escape from the linear portion 66 of the control pivot plate 48,
As shown in FIG. 5, the control turning plate 48 turns, whereby a part of the cassette 1 projects from the opening 34.

[Tape traveling device moving mechanism] This magnetic tape device is configured to move to the data conversion position only while the tape traveling device 25 is inserted with the cassette 1. As shown in FIG. 8, FIG. 9, FIG. 15 to FIG. 19, the tape running device moving means for carrying out this is a tape running device moving member 83, a tape running device lowering lever 84, Lifting lever 85 and lifting spring
And a cam 67 having the second cam surface 70 of the cam 67 described above.
And a cam motor 73. Among these cam motors
Except for 73, the rotational movement of the cam motor 73 is controlled by the reel drive shaft 29,
It is a rotation-linear conversion mechanism for converting 30 axial movements (linear movements).

The tape traveling device moving member 83, as shown in FIG.
The part 87 parallel to the fixed main board 22 and this part
A pair of side surface portions 88 bent at a right angle to 87,
89, three guide portions 90 bent at a right angle from the pair of side surface portions 88, 89 and arranged in parallel with the portion 87, and a portion 91 bent at a right angle from the portion 87,
It is a member that is composed of a connecting portion 92 arranged substantially in the center of this portion 91 and that moves linearly along the second virtual straight line 37.

The side surface portions 88 and 89 of the moving member 83 have three grooves 96 each having an inclined portion 93 and upper and lower horizontal portions 94 and 95 continuous with the inclined portion 93.
Is provided. It should be noted that the two grooves 96 are provided on one side surface portion 88.
Is provided, and one groove 96 is provided in the other side surface portion 89. Further, the guide portions 90 and 91 are provided with elongated holes 97 extending in parallel with the second virtual straight line 37 shown in FIG. 5, respectively. Pins 98 implanted in the main board 22 are inserted into the long holes 97 as shown in FIG. Therefore, the moving member 83
It is movable only in the direction of the 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 is a portion 99 parallel to the fixed main substrate 22 shown in FIG. 8 as shown in FIG.
And a pair of side surface portions 100 and 101 that are bent at a right angle from this portion 99 and that are arranged parallel to the side surface portions 88 and 89 of the moving member 83. 2 in the part 99 of the support substrate 26
Two holes 102 are formed therein, and guide pins 103 which are planted in the fixed main board 22 and extend downward from here are inserted therein. Therefore, the support substrate 26 supporting the pair of reel drive shafts 29, 30 and the pair of reel motors 27, 28 has a direction in which the reel drive shafts 29, 30 extend (a direction perpendicular to the main substrate 22).
Only move to. In order to engage the support substrate 26 and the moving member 83 to change the movement direction, two pins 104 are implanted in one side surface portion 100 of the support substrate 26, and one pin 104 is implanted in the other side surface portion 101. Pin 104 is planted. Each pin 104 has a side surface 10
The projections 0, 101 are projected outward at a right angle, and are inserted into the grooves 96 of the moving member 83. The groove 96 of the moving member 83 functions as a cam surface, and converts the movement of the moving member 83 in the direction of the imaginary straight line 37 in FIG.

As shown in FIGS. 16 and 17, the raising lever 85 for raising the support substrate 26 of the tape running device 25 has an elongated hole 105.
It is connected to the connecting portion 92 of the moving member 83 by the pin 106 inserted in. Although not shown in FIG. 9, the raising lever 85 is arranged above the lowering lever 84 as shown in FIGS. 16 and 17. This lift lever 85
Are the pins 107 implanted in the sub-board 56 as shown in FIG.
It is rotatably supported by. The lifting coil spring 86 arranged between the tip of the lifting lever 85 and the sub-board 56 is the 16th coil spring.
17 and 17, the raising lever 85 is always biased clockwise. That is, the raising lever 85 always presses the moving member 83 leftward (toward the head). As shown in FIG. 9, one end of the lowering lever 84 is connected to the connecting portion 92 of the moving member 83 by the pin 106 inserted in the elongated hole 108, and the other end is pinned as a cam follower 109 planted therein. Engages the second lower cam surface 70 of the cam 67. The lowering lever 84 is rotatably supported by a pin 110 implanted in the sub-board 56 as shown in FIG.

The second cam surface 70 of the cam 67 has a first cam surface 70 as shown in FIG.
From the position P1 to the second position P2, the radius gradually increases from the center of the cam 70a, and from the second position P2 to the third position P3, the radius gradually decreases. Area 70b and a third area 70c having the smallest radius from the third position P3 to the first position P1. In FIG. 21, changes in the position of the cam driven pin 109 are indicated by P1 to P5.
The respective positions correspond to the respective positions P1 to P5 shown in FIG. That is, the positions indicated by the same reference numerals in FIGS. 20 and 21 are cams.
67 shows the same angular position.

In response to the power being turned on, the cam driven pin 109 is positioned at the first position P1 shown in FIG. Since the radius from the cam center on the second cam surface 70 to the first position P1 is small, the pin 109 is closer to the center of the cam 67 in FIG. For this reason, the lower end side of the lowering lever 84 in FIG. 9 is at a position away from the head 23 (to the right), and the moving member 83 also moves to the ninth position.
As shown in FIG. 17 and FIG. 17, it is on the right side, and the lifting / lowering holding substrate 26 is at a lower position as shown in FIG. Therefore, the reel drive shafts 29, 30 are separated from the hubs 10, 11.

After that, when the cam 67 starts rotating clockwise (counterclockwise in FIG. 20) in FIG. 21, the radius of the cam surface 70 from the center of the cam gradually increases. In FIG. 17 and FIG. 17, the right movement, that is, the lever 84 can be rotated clockwise, and the lifting lever 85 can also be rotated clockwise. As a result, the spring 86 rotates the raising lever 85 in the clockwise direction and pushes the moving member 83 to the left in FIG.
16 Move to the position shown in Fig. As a result, the horizontal part of the groove 96
The pin 104 comes out of the 96a, and the pin 104 is the inclined portion 96b of the groove 96
Pressed by. Since the sloped portion 96b is formed in the right downward direction in FIG. 18, when the pin 104 is pressed by the sloped portion 96b, a component that pushes up the pin 104 is given, and the support substrate 26 integrated with the pin 104 is formed. Guided by the vertical guide pin 103, it rises. Then, as shown in FIG. 19, the groove 96
The pin 104 enters the horizontal portion 96c on the upper side of, and the ascending of the support substrate 26 is stopped. When the pin 104 of the support substrate 26 moves to the height shown in FIG. 19, the motors 27, 2 supported by the support substrate 26 are
8, reel drive shafts 29, 30, guide pins 31, 32 also rise,
The reel drive shafts 29 and 30 are engaged with the hubs 10 and 11 of the tape cassette 1 through the through holes 111 of FIG. 1 formed in the main board 22, and the guide pins 31 and 32 are through holes of the main board 22 ( (Not shown)
Through the through holes 14 and 15 of the tape cassette 1.
As a result, the tape 9 can be run.

When the reel drive shafts 29 and 30 are disengaged from the hubs 10 and 11 of the cassette 1, the cam engagement pin 109 moves to the second position P in FIG.
Turn the cam 67 so as to move from 2 to the third position P3. Since the radius is gradually reduced in the area 70b of the cam surface 70, the cam follower pin 109 is gradually pushed leftward in FIG. 16 by the cam 67, the lowering lever 84 rotates counterclockwise, and the moving member is moved. 83 slides to the right in FIG. 16, and the supporting substrate 26 of the tape running device returns from the raised position in FIG. 19 to the lowered position in FIG.

[Operation Timing] The setting of the time relationship between the operation of inserting and ejecting the cassette 1 and the lifting and lowering of the tape transport device 25 is performed by the common cam 67
And a cassette insertion detection switch 112 shown in FIG. 8 and FIG.
A tape running device rise detection switch 113 shown in FIG.
The power-on detection switch 75, the reference position detector 80,
It is performed by the eject switch 81. The cassette insertion detection switch 112 is arranged at a position where it can be operated by a pin 114 implanted in the cassette moving lever 44, and is fixed to the sub-board 56. The tape traveling device rise detection switch 113 is fixed to the lower side of the main board 22 and is arranged at a position where it is pressed by a part of the holding substrate 26 of the tape traveling device 25. Both the cassette insertion detection switch 112 and the traveling device rise 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 described with reference to FIG. At some point when you turn on the device,
A signal indicating power-on from the power-on detection circuit 75 is a control circuit
Given to 76, the rotation of the cam motor 73 starts. 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 stops. If the cam 67 is at the reference position P1 when the power is turned on, the cam motor 73 does not rotate.

A little before the time t2 after the power is turned on, the cassette 1 is set to the case 20.
When it reaches the first position shown by the broken line 36 in FIG. 5 at t2 at the time t2, the restriction of the pin 64 by the control turning plate 48 is released, so that the cassette moving lever 44 springs. It rapidly rotates by the force of 47, and at time t3, the cam engagement pin 74 moves to a region 69b having a large radius of the first cam surface 69 as shown in FIG. Since the position after this movement is the same angular position as the first position P1, it is indicated by P1a in FIG. In this embodiment, the area of the first cam surface 69 is set so that the insertion of the cassette is stopped just before the final insertion position of the cassette 1.
69b is set. When the cassette 1 is inserted slightly before the final insertion position of the cassette by the movement of the cam engagement pin from P1 to P1a, the cassette insertion detection switch 112 is turned on as shown in FIG. In response, the cam motor 73 starts rotating as shown in FIG. Therefore, the cassette insertion detection switch 112 also functions as movement command means for instructing to move the tape running device 25 to the hub engagement position. When the cam 67 is rotated counterclockwise in FIG. 20 (clockwise in FIG. 21) by the cam motor 73, the second cam driven pin 109 moves the first position P1 to the second position P2 in FIG. Move to. As a result, the tape running device 25 including the reel drive shafts 29 and 30 is raised. Cassette 1 while reel drive shafts 29 and 30 are being raised
Is not fixed to the final position, the hubs 10 and 11 and the cassette can be moved a little when the reel drive shafts 29 and 30 are inserted into the hubs 10 and 11, and the engagement between the two can be relatively smoothly established. be able to.

At time t4, the second cam driven pin 109 reaches the second position P2 in FIG. 21, and when the reel drive shafts 29 and 30 are completely raised,
As shown in FIG. 24 (D), the rise detection switch 113 is turned on, and in response thereto, the rotation of the cam motor 73 is stopped. At time t4, the first cam follower pin 74 reaches the second position P2 in FIG. 20 and moves out of the region 69b of the first cam surface 69, so that the restriction by the cam surface 69 is released and the cassette moving lever 44 Moves to the fully inserted position of the cassette 1. Incidentally, when the cassette insertion detection switch 112 is turned on, the insertion of the cassette 1 has already been completed at a position where the reel drive shafts 29, 30 can be inserted into the hubs 10, 11. Further, the cassette insertion detection switch 112 is the cassette 1
However, since the operating piece has a spring property, the cassette insertion detection switch 112 can be normally turned on by the pin 114 even when the cassette 1 is completely inserted. Since the reel motors 27 and 28 start rotating from the time t4 when the rise detection switch 113 detects the rise of the reel drive shafts 29 and 30, data recording / reproduction can be started immediately after the cassette is loaded.

When the eject switch 81 is turned on as shown in FIG. 24 (G) at time t5 after recording / reproduction of data, the reel motors 27, 28 are stopped and controlled as shown in FIG. 24 (C). The cam motor 73 rotates as shown in FIG. As a result, the second driven pin 109 moves from the second position P2 to the third position P3 on the second cam surface 70 of the cam 67, and the second driven pin 109 is pressed toward the center of the cam 67. The traveling device 25 including the reel drive shafts 29 and 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, the reel drive shaft 2
Until the lowering operation of 9 and 30 is completed, the first driven pin 74 is not restricted by the first cam surface 69 as shown in FIG. 20, so that the cassette moving lever 44 keeps the insertion position. At time t6, the first driven pin 74 moves to the fourth position P4 of the first cam surface 69.
Then, the first driven pin 74 is gradually pressed toward the center of the cam, and the cassette moving lever 44 rotates counterclockwise,
The ejection operation of the cassette 1 starts. When the ejection operation of the cassette 1 starts, the cassette insertion detection switch 11
2 turns off and then t as shown in Fig. 24 (F).
The reference position P1 is detected at 8 points in time, and in response thereto, the cam motor 73 is stop-controlled.

From the opening 34 of this magnetic tape device, the reel drive shafts 29, 30
If a cassette-like or odd-shaped object that hinders the upward movement is mistakenly inserted, the upward detection switch 113 is not turned on. Therefore, the stop control of the cam motor 73 based on the output of the rise detection switch 113 is not executed, and the cam motor 73 and the cam 67 continue to rotate. As a result, when the reel drive shafts 29, 30 are partially raised, 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 area 69a of the first cam surface 69 shown in FIG. 20, the cassette moving lever 44 reaches the cassette discharge position shown in FIG. 5, and foreign matters such as odd-shaped cassettes are discharged. It

[Modifications] 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 in which the magnetic tape 9 is run with a capstan and a pinch roller.

(2) 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.

(3) A first cam surface 69 for controlling the movement of the cassette 1 is provided on one surface of the cam 67, and a second cam surface 70 for moving (elevating) the tape running device 25 is provided on the other surface. This is beneficial for simplicity of construction, but the first and second cam surfaces 69, 70 may be provided on separate cams if desired.

(4) A switch for detecting whether or not the raising operation of the reel drive shafts 29, 30 has started is the raising completion detection switch 11
It may be provided separately from 3.

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

(6) It is possible to raise and lower only a part including the reel drive shafts 29 and 30 without raising and lowering the entire tape running device 25.

[Brief description of drawings]

FIG. 1 is a plan view showing a magnetic tape device according to an embodiment of the present invention with a part thereof omitted, FIG. 2 is a plan view of a tape cassette used in the magnetic tape device of FIG. 1, and FIG. 2 is a left side view of the tape cassette, FIG. 4 is a front view of the magnetic tape device of FIG. 1, and FIG. 5 is a state in which the cassette carriage is removed from the magnetic tape device of FIG. 6 is a plan view showing a state where a part of the tape cassette is inserted into the opening of the case in FIG. 6, FIG. 6 is a plan view showing the magnetic tape device in a state where the insertion of the tape cassette is completed, similar to FIG. 5, and FIG. 1 is a sectional view showing a part of line VII-VII of the magnetic tape device shown in FIG. 1, FIG. 8 is a sectional view showing a part of line VIII-VIII of the magnetic tape device shown in FIG. 1, and FIG. Remove the upper part of the magnetic tape device shown in the figure from the board, FIG. 10 is a plan view showing a part of the lifting mechanism, FIG. 10 is a plan view showing the control rotation plate of FIG. 1, FIG. 11 is a plan view showing the sliding plate of FIG. 1, and FIG. FIG. 13 is a side view showing the cassette moving lever shown in FIG. 13, 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 and its driving mechanism shown in FIG. 1, and FIG. FIG. 9 is a perspective view showing the moving member of the tape running device of FIG. 9, and FIG. 16 is a plan view showing the moving member of FIG. FIG. 17 is a plan view showing the same mechanism as in FIG. 16 in a state where the tape running device is lowered, and FIG. 18 is a part of the magnetic tape device in FIG. 9 as XVIII-XVIII.
Fig. 19 is a view seen from the line, and Fig. 19 shows a state in which the tape running device support substrate is raised
FIG. 20 is a view similar to the drawing, FIG. 20 is a plan view showing the cam of FIG. 1, FIG. 21 is a bottom view of the cam of FIG. 1, and FIG. 22 is a sectional view of the cam of FIG. 20 taken along the line XXII-XXII. FIG. 23 is a control circuit diagram of the cam motor and the reel motor, and FIG. 24 is a diagram showing operation timing of each part of the magnetic tape device. 1 ... tape cassette, 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 opening for attaching / detaching, 35 …… First virtual straight line, 37 …… Second virtual straight line, 42 …… Carriage, 44 …… Cassette moving lever , 46 …… Sliding plate, 47 …… Coil spring for cassette insertion,
48 ... Control rotation plate, 56 ... Sub-board, 67 ... Cam, 69 ...
… First cam surface, 70 …… Second cam surface, 73 …… Cam motor, 75 …… Power-on detection circuit, 83 …… Tape traveling device moving member, 84 …… Tape traveling device lowering lever, 85… … Lifting lever, 86… Lifting spring, 112… Cassette insertion detection switch, 113… Tape running device lift detection switch.

Claims (1)

[Claims] 1. A magnetic tape, a pair of hubs around which the magnetic tape is wound, and a cassette half for housing the magnetic tape and the pair of hubs. The cassette half includes a pair of main surfaces and the magnetic tape. A case having an opening for inserting a magnetic tape cassette having a front surface having a head insertion opening for exposing, a back surface facing the front surface, and a pair of side surfaces, and the tape cassette inserted in the case Inside the case so as to come into contact with the magnetic tape through a cassette moving means for moving the magnetic tape to a predetermined data conversion position, and the head insertion opening of the tape cassette moved to the data conversion position by the cassette moving means. Associated with the magnetic head for signal conversion arranged on the tape cassette and the hub of the tape cassette placed at the data conversion position. A hub engaging position and the tape running device, wherein the reel drive shaft engages with the hub of the tape cassette placed on the data conversion position including a pair of reel drive shaft for causing,
A magnetic tape device comprising: a tape running device moving means for moving the tape running device so that the tape running device can be located at a hub separated position separated from the hub, wherein the tape running device moving means comprises: A motor, a cam coupled to the motor so as to be rotated by the motor, and a follower following the cam are provided at one end, and are formed to rotate in response to the rotation of the cam. And a lever that is connected to the other end of the lever so that it can make a linear movement in a direction parallel to the main surface of the tape cassette inserted in the data conversion position in response to the rotation of the lever. And a linear movement of the linear movement member in a direction parallel to the main surface of the tape cassette as an axial movement of the reel drive shaft of the tape running device. A motion direction converting mechanism for converting, and a spring for applying a force in a direction for moving the tape running device toward the hub engaging position to the linear moving member, the follower of the cam A cam surface contacting the tape drive device and a first region for enabling the rotation of the lever so as to allow the tape drive device to be located at the hub engaging position; A second region for driving the lever so as to move from the engagement position to the hub separation position, and for controlling the rotation position of the lever so as to keep the tape running device at the hub separation position. A third region, but does not have a region for driving the lever so as to move the tape running device from the hub separation position to the hub engagement position during one rotation of the cam. Cassette-type magnetic tape apparatus.