JPH0256739B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention involves pulling out a magnetic tape from a tape cassette having an opening on the front surface, attaching the magnetic tape to a magnetic head installed outside the tape cassette at a predetermined angle, and running the tape. VTR that records/plays signals
The invention relates to magnetic tape devices such as the above.

Conventional configurations and their problems Generally, in a magnetic tape device such as a cassette-type video tape recorder, there are two positions: a first position where the magnetic tape can be pulled out from the opening of the tape cassette; A magnetic tape drawing means is provided which moves back and forth between a second position where the magnetic tape can be attached to the magnetic head, and in particular, in the second position, the magnetic tape is adapted to accurately record and reproduce signals between the magnetic tape and the magnetic head. A stopper is disposed at the second position to increase the accuracy of the stop position at the second position, which accurately determines the winding angle of the magnetic tape relative to the magnetic head, and to stably fix the magnetic tape, and the magnetic tape drawing means is made of an elastic member or the like. Pressing and fixing is performed with
In order to determine the position of the magnetic tape pull-out means, it is common to use a method of improving the mechanical precision of the components of the magnetic tape pull-out means or a method of providing a detent means in the magnetic tape pull-out means. . However, these methods have the problem that the position at the first position is difficult to stabilize due to variations in the component parts and bumps in the drive section of the magnetic tape pull-out means. Therefore, when the tape cassette is installed in the device, the magnetic tape pull-out means does not fit smoothly into the opening of the tape cassette, and comes into contact with the wall forming the opening of the tape cassette, causing damage to the tape cassette and the magnetic tape pull-out means. Serious accidents such as damage to the magnetic tape due to contact with the magnetic tape are likely to occur.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and improves the positional accuracy of the magnetic tape pull-out means at the first position, and also prevents damage to the tape cassette, the magnetic tape pull-out means, and the magnetic tape. The purpose is to

Structure of the Invention In order to achieve the above object, the magnetic tape device of the present invention uses a tape cassette which incorporates a reel hub around which a magnetic tape is wound and has an opening in the front part, pulls out the magnetic tape from the cassette, and extracts the tape from the tape cassette. The magnetic tape is configured to run attached to a magnetic head installed outside the tape cassette to record/reproduce signals, and the magnetic tape is connected to a first position where the magnetic tape in the tape cassette can be pulled out from the opening and a magnetic head installed outside the tape cassette. a magnetic tape pull-out means that reciprocates between a second position where the tape can be pulled out and attached to the magnetic head; and a first position that determines the position of the magnetic tape pull-out means in the first position.
a fixed wall, and in the first position, the magnetic tape pull-out means is rotationally biased in the direction of the first position;
a first elastic member provided on the magnetic tape pull-out means that presses and fixes the magnetic tape pull-out means against the first fixed wall; a second fixed wall that determines the position of the magnetic tape pull-out means at the second position; The magnetic tape extracting means is provided with a second elastic member that rotationally biases the magnetic tape extracting means in the direction of the second position at the position and presses and fixes the magnetic tape extracting means against the second fixed wall.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the drawings. First, a first embodiment will be explained based on FIGS. 1 to 10. 1 and 3 show top views of this embodiment. In the figure, a take-up reel stand 10 and a supply reel stand 12, which are rotatably loosely fitted to shafts 4 and 6 which are installed on the upper surface of the substrate 2, are arranged so that when a cassette 20 is installed at a predetermined location on the main body of the apparatus, the cassette 20 respectively engages with the take-up reel hub 14 and the supply reel hub 16, and both the reel stands 10, 12
It can be rotated integrally by a claw 8 provided in the. FIG. 2 shows a sectional view of the reel stand drive system, and the take-up reel stand 10 and the supply reel stand 12 have reel gears 30 and 40, respectively.
is a take-up reel idler gear unit 52 that is rotatably loosely fitted onto shafts 50 and 60 that are planted on the substrate 2;
The supply reel is meshed with the idler gear unit 62 and driven to rotate. The take-up reel idler gear unit 52 and the supply reel idler gear unit 62, as shown in FIG. reel gear 30 via means;
Take-up reel idler gear 54b meshing with 40
and is transmitted to the supply reel idler gear 64b. On the other hand, the capstan 72, which is rotatably supported by a bearing member 70 fixed to the substrate 2, has a rotating roller portion 74 in a part thereof, and is pressed against the rotating roller shaft 74 by applying a predetermined pressure force. The rotation is transmitted to the main idler 76. The main idler 76 is a pulley part 7 that is integrally constructed.
8 and a relay roller 82 which is rotatably loosely fitted onto a shaft 80 set on the substrate 2, and transmits the twisting rotation to the relay roller 82. A rotating arm 88 having a rotatable idler gear 86 supported at one end is loosely fitted to the shaft 80, and a multi-pole magnet 90 is integrally mounted on the outer periphery so as to be substantially concentric with the shaft 80. It is placed. Further, on the inner circumference of the relay roller 82, a magnetic material 9 having a magnetic hysteresis characteristic is arranged so as to face the magnet 90 with a predetermined clearance.
2 is fixed, and generates a predetermined attraction force between it and the magnet 90, and applies a rotational force to the rotating arm 88 in the same direction as the rotational direction of the relay roller 82.
Furthermore, the idler gear 86 is constantly connected to the relay roller 8.
The take-up reel idler gear 54a is configured to mesh with a gear portion 94 provided at
Alternatively, the rotation of the capstan 72 is selectively transmitted to the take-up reel stand 10 or the supply reel stand 12 depending on the direction of rotation by meshing with either the supply reel idler gear 64a. A pinch roller lever 22 is rotatably fitted loosely onto a shaft 18 that is set up on the substrate 2, and a pinch roller 192 is rotatably supported on a shaft 24 that is set up at one end of the pinch roller lever 22. ing. Board 2
A crimp lever 3 is provided with an elongated hole 28 in the shaft 26, which is rotatable and slidable in the longitudinal direction.
A connecting arm 36 is rotatably fitted to the pin 34 which is loosely fitted to the pin 34 and is set up at one end thereof, and the other end of this connecting arm 36 is connected to the pin 34 which is set up at the other end of the pinch roller lever 22. 38 and is rotatably fitted with play. Further, a spring hook 42 is formed at the other end of the crimp lever 32, and a tension spring 44 is formed on the other end of the crimp lever 32.
is stretched between the shaft 26 and the spring hook 42,
Press the crimp lever 32 upward in FIG.
8 and the shaft 26 are in contact with each other.
That is, the pinch roller lever 22, the connecting arm 36, and the pressure lever 32 constitute a so-called toggle mechanism. Further, at the other end of the crimp lever 32, a pin 46 passes through a hole (not shown) provided in the substrate 2 and extends toward the back side of the device to connect to a main rod 4, which will be described later.
It is configured to abut against a bent portion 21 provided at 8. Therefore, when the main rod 48 moves leftward in FIG. 1 to the position shown in FIG.
1 is in contact with the pin 46, so the crimp lever 32
is rotated clockwise, and the pinch roller lever 22
rotates counterclockwise until the pinch roller 192 contacts the capstan 72. The pinch roller lever 22 is not rotated after that, but the crimping lever 32 continues to rotate clockwise, so the tension spring 4
4, the pressure lever 32 is guided by the elongated hole 28 and moves downward in FIG.
It will be crimped. In the reproduction mode, the magnetic tape 180 wound on the supply reel hub 16 as shown in FIG. As shown in FIG. It is attached to the tape guide 190.
Furthermore, since the capstan 72 is rotating clockwise in FIG. 3, the main idler 76 is rotating counterclockwise in FIG. 3, and the belt 84 and relay roller 82 are rotating counterclockwise in FIG. . Therefore, the rotating arm 88 is given a rotational force in the counterclockwise direction in FIG. 3 about the shaft 80, and the idler gear 86, which is rotating clockwise in FIG. 3, meshes with the take-up reel idler gear 54a. Therefore, the take-up reel stand 10 is rotated clockwise via the clutch means described above.
The pinch roller 192 and the capstan 72 cooperate to wind the magnetic tape 180 fed at a constant speed around the take-up reel hub 14 without slack. On the other hand, a driving gear 160 driven by a motor (not shown) is provided on the back surface of the substrate 2 shown in FIG. It meshes with a rotating body 142 having a. Furthermore, this rotating body 142 also meshes with a cam 162 having a gear portion 170 on its outer periphery. This cam 162 has a shaft 1 mounted on the base plate 2.
64, and is a positive cam having a groove 166 extending over 360 degrees as shown in FIG.
The lift curve is as shown in FIG.
is made to move. Further, on the back side of the substrate 2, the rotation shaft 4 of the take-up reel stand 10 and the rotation shaft 50 of the take-up reel idler gear unit 52 extend from the surface, and the guide shaft 132 and the cam 162
A rotating shaft 164 is installed, and the cam 16
The main rod 48 has a cam follower 146 that engages the two grooves 166.
The guide grooves 35, 37, 39, and 41 are fitted loosely so as to be movable back and forth. The cam 162
has a partial gear 43 with some teeth removed on the end face where the groove 166 is not provided, and is configured to have a constant angular relationship with the groove 166. Then, when the cam 162 rotates by a certain angle in the clockwise direction in FIG. 4 from the stopped state shown in FIG.
3 is configured to move. Here, referring to FIGS. 4 to 9, the tape pull-out members 182 and 183 are moved from the position shown in FIG. 1 or 4 in the stopped state to the fixing members 184 and 185 in FIG. The operation of moving the guide posts 23 and 27 to the position where they come into contact and press together will be described in detail. FIGS. 4 and 5 show the positional relationship in the stopped mode. The first gear that can mesh with the partial gear 43
The sector gear 45 is rotatably loosely fitted onto a shaft 51 mounted on the base plate 2, and is integrally formed with a second sector gear 49 having a gear portion. An arm 55 is formed integrally with the first sector gear 45 and the second sector gear 49, and has a pressing pin 53 planted at its tip. 57 is a third sector gear having a gear part,
It is rotatably loosely fitted onto a shaft 59 mounted on the base plate 2 and meshed with the second sector gear 49 .
Reference numeral 98 denotes an arm having a hole 61 having a cam surface 63, which will be described later, into which the pressing pin 53 is inserted so as to be able to come into contact with the cam surface 63. Reference numeral 154 denotes a pin installed in the first sector gear 45, and the tension spring 152 is stretched between the pin 154 and the base plate 2, and in the stopping mode shown in FIGS. 4 and 5, the first sector gear 45 is integrally formed. 45 and the second fan-shaped gear 49, a rotational force is applied in the clockwise direction in FIG.
Reference numeral 65 denotes a fourth sector gear having a gear part that can rotate around a shaft 59 integrally with the third sector gear 57 and arm 98, and is a gear that can rotate around a shaft 67 set on the base plate 2. However, it meshes with the first loading gear 69. A second loading gear 71 is a gear that can rotate around the shaft 67 together with the first loading gear 69, and is a gear loosely fitted in a rotatable manner to the shaft 73 that is set on the base plate 2. It meshes with the third loading gear 75 and rotates synchronously. Reference numeral 77 denotes a left loading first arm, which is rotatably fitted loosely on the shaft 67, and is connected to a spring hook 79 provided on the left loading first arm 77 and a second loading arm as shown in FIGS. A tension spring 81 is stretched between a pin 83 set on the gear 71, and a stopper 85 provided on the left loading first arm 77 is brought into contact with the pin 83, thereby causing the left loading first arm 77 and the first left loading arm 77 to come into contact with each other. 2 loading gear 71
It is configured to be integrated and rotate together. A pin 8 is attached to one end of the left loading first arm 77.
The second left loading arm 87 is rotatably coupled to the second left loading arm 87 by 9, and a hole 91 is formed at the other end of the second left loading arm 87, and the hole 91 is engaged with a pin 93 set on the tape pull-out member 182. be. Reference numeral 95 designates the right loading first arm, and the third loading gear 75 has the same configuration as that between the left loading first arm 77 and the second loading gear 71 described above.
The other end is also rotatably connected to the right side loading second arm 99 by a pin 97, and a hole 101 formed in the other end of the right side loading second arm 99 is inserted into the tape pull-out member 183. The pin 103 is engaged with the pin 103. At this time, as described above, the second sector gear 49 is given a rotational force in the clockwise direction in FIG. The fourth sector gear 65, which is integral with the third sector gear 57, receives rotational force in the counterclockwise direction in FIG. And it meshes with the fourth sector gear 65. First loading gear 69
The second loading gear 71 receives a rotational force in the clockwise direction in FIG. 5, and the third loading gear 75 meshing with the second loading gear 71 receives a rotational force in the counterclockwise direction in FIG. Therefore, the left loading first arm 77 and the left loading second arm 87, which can rotate integrally with the second loading gear 71, also receive the rotational force in the clockwise direction in FIG. Tape drawer member 1 in engagement relationship with hole 91 drilled in
82 is biased in the direction of arrow A in FIG.
The pin 93 is attached to the fixed wall 115a provided at the end of the
will be under pressure. Furthermore, the tape pull-out member 182 is provided with guide bosses 117a and 119a having approximately the same diameter as the groove width of the guide groove 31, and these are adapted to fit into the guide groove 31, so that the tape pull-out member 182 can be moved in the stopped state. , the position in the direction of arrow A in FIG. 4 is regulated by the pin 93 and the fixed wall 115a, and at the same time, rotational movement about the pin 93 is also regulated. Similarly, the right loading first arm 95 and the right loading second arm 99, which can rotate integrally with the third loading gear 75, receive rotational force in the counterclockwise direction in FIG. The tape pull-out member 183 in engagement with the hole 101 formed in the arm 99 is biased in the direction of arrow B in FIG. 4, and the pin 103 is pressed against the fixed wall 115b provided at the end of the guide groove 33. become. In addition, the tape drawer member 183 has a guide groove 3.
Guide bosses 117b, 119 having approximately the same diameter as the groove width of No. 3
b and are adapted to fit into the guide groove 33, so that when the tape pull-out member 183 is in the stopped state, the pin 103 and the fixed wall 115b
As a result, the position in the direction of arrow B in FIG. 4 is regulated, and at the same time, the rotational movement about the pin 103 is also regulated. Therefore, in the stopped state as shown in FIG.
Tape guide posts 23, 25 planted at 83
27 and 29 are fixed to the opening wall 120 of the cassette 20 and the magnetic tape 180 at a predetermined distance. Now, when the cam 162 starts to rotate clockwise from the position shown in FIG. 5, the rotation angle is 40 degrees and the partial gear 43 and the first
The sector gear 45 starts meshing, and the first sector gear 45,
The second sector gear 49 begins to rotate counterclockwise against the biasing force of the tension spring 152. Further, since the third sector gear 57 and the fourth sector gear 65 rotate clockwise, the first loading gear 69, the second loading gear 71, and the left loading first arm 7
7 rotates counterclockwise, and the third loading gear 75 rotates clockwise, the right side loading first arm 95 rotates clockwise, and as a result, the tape pull-out members 182 and 183 move toward the guide groove 3.
1 and 33. FIG. 6 shows the cam 162 rotated 105 degrees. At this time, from the partial gear 43 to the first loading gear 69, the second loading gear
Loading gear 71, third loading gear 7
All movements up to 5 are performed by a gear train. FIG. 7 shows a state in which the cam 162 has been rotated to 160 degrees. At this time, the second sector gear 49 and the third
The sector gear 57 is disengaged from the meshing relationship, and the pressing pin 53
has started contacting the cam surface 63 provided on the arm 98. Also, at this time, the pin 154 suspending one end of the tension spring 152 has passed the dead center,
The tension spring 152 applies a rotational force to the first sector gear 45 and the arm 55 in the counterclockwise direction in FIG. This means that the sector gear 45 can be rotationally driven with less torque. In this state, the left loading first arm 77 and the right loading first arm 95 have moved the tape pull-out members 182, 183 to positions where the guide posts 23, 27 abut the fixing members 184, 185, respectively. Furthermore, the cam 162
If you continue rotating clockwise in Figure 7 from the state shown in the figure,
The first sector gear 45 rotates counterclockwise in FIG. 7, and the arm 98 presses the cam surface 63 with the pressing pin 53 since the second sector gear 49 and the third sector gear 57 have been disengaged. Continue rotating clockwise. As mentioned above, tape guide post 2
3 and 27 are in contact with the fixed members 184 and 185, the left loading first arm 77 and the right loading arm 95 cannot rotate beyond the state shown in FIG. 7, and as a result, the first loading gear 69 and the third
The loading 75 continues to rotate counterclockwise and clockwise, respectively, against the biasing forces of the tension springs 81 and 109. When the cam 162 rotates to a rotation angle of 180 degrees, the meshing relationship between the partial gear 43 and the first sector gear 45 is disengaged, and the pressing pin 53 is positioned at the horizontal portion of the cam surface 63 in FIG. . The toothless portion 111 of the third sector gear 57 is
This is provided to prevent tooth interference when the sector gear 49 and the third sector gear 57 are disengaged from each other and the press pin 53 and the cam surface 63 are brought into contact. FIG. 8 shows the state in which the cam 162 has rotated to a rotation angle of 205 degrees and is in a regenerating state. As mentioned above, from the state shown in FIG.
7. Since the first loading gear 69 and the third loading gear 75 rotated counterclockwise and clockwise, respectively, while the first loading arm 95 on the right side cannot rotate, there is a gap of Δl between the pin 83 and the stopper 85. 〓There is a pause, and the right side loading 1st
There is also a gap of Δl' between the stopper provided on the arm 95 and the pin planted on the third loading gear 75. After all, the distances Δl and Δl' are nothing but the elongation of the tension springs 81, 109, and a force corresponding to this elongation is applied to the guide posts 23, 22.
7 is pressed against the fixing members 184 and 185, and the magnetic tape 180 is stabilized, the rotating magnetic head 186
It will be attached to. On the other hand, it is obvious that the pressing force by the tension springs 81 and 109 acts as a reaction force to rotate the first loading gear 69 and the third loading gear 75 clockwise and counterclockwise, respectively. sector gear 65
The arm 98 receives a rotational force in the counterclockwise direction, and this rotational force is applied to the pressing pin 53 as shown in the arrow in FIG. It will be applied in the A direction. However, since the direction of arrow A is configured to match the direction in which the pressing pin 53 and the shaft 51 are connected, this rotational force is applied to the arm 55 and the first shaft 51.
The force cannot be effective to rotate the sector gear 45, and despite the existence of the reaction force of the pressing force, the first
The sector gear 45 can maintain the state shown in FIG. 8, and therefore the cam 162 can continue to rotate clockwise without being affected by the reaction force while being disengaged from the first sector gear 45. Become. Next, the relationship between the movement of the main rod 48 due to the rotation of the cam 162 and the movement of the tape drawing member will be explained. When the cam 162 rotates 60 degrees clockwise from the stopped state shown in FIG. 4, the main rod 48 moves 1.5 mm to the right in FIG. Due to the pressure, the pinch roller 192 approaches the capstan 72. When the cam 162 continues to rotate and reaches a rotation angle of 180°, the main rod 48 moves an additional 2.5 mm, and the pinch roller 192 moves to the capstan 72.
However, it does not generate any pressing force. When the cam 162 rotates from a rotation angle of 180° to 200°, the main rod 48 further moves about 2 mm to the right in FIG. 4, and the pinch roller 192 is pressed against the capstan 72 with a predetermined pressing force by the tension spring 44. That is, as is clear from the cam lift curve shown in FIG.
This means that the rotational angle ranges that require rotational force on the cam 162 to press the cam 162 to the fixing members 184 and 185 do not overlap.

Next, the operation will be explained. When the playback button (not shown) is pressed from the stop state shown in FIG. 1, the motor (not shown) rotates, causing the drive gear 160 and the rotating body 142 to rotate clockwise and counterclockwise in FIG. 4, respectively. The cam 162 starts rotating clockwise in FIG. When the cam 162 rotates through a rotation angle of 40 degrees, the partial gear 43 and the first sector gear 45 begin to mesh, and the tension spring 152 causes the tape pull-out members 182, 183 that have been pressed to the fixed walls 115a, 115b of the guide grooves 31, 33 to be pulled out. The magnetic tape 180 is moved at a substantially constant speed and begins to be drawn out of the cassette 20. At the same time, the main rod 48 also follows the groove 166 and begins to move to the right in FIG.
2 begins to approach the capstan 72 direction. When the cam 162 continues to rotate and rotates to a rotation angle of 160 degrees, the meshing relationship between the second sector gear 49 and the third sector gear 57 is disengaged, and the press pin 53 enters into contact with the cam surface 63 and guide posts 23, 27. is the fixed member 18
4, 185, and when the cam 162 continues to rotate to a rotation angle of 180 degrees, the press pin 53 slides on the cam surface 63, thereby pressing the guide posts 23, 27 onto the fixing members 184, 185. It turns out. At this time, the biasing force of the tension spring 152 applies rotational force to the first sector gear 45 and the arm 55 in the counterclockwise direction in FIG.
This reduces the load during the crimping operation on the fixing members 184 and 185 of No. 3 and 27, and significantly reduces the motor current. Further, at this time, it is clear that if the pressure angle of the cam surface 63 with respect to the pressing pin 53 is made as small as possible, the guide posts 23, 27 can be pressed onto the fixing members 184, 185 with even less force. At this time, since the cam 162 has rotated to a rotation angle of 180 degrees, the main rod 48 has moved approximately 4 mm to the right in FIG. 4, as shown in FIG. do. Further, as the cam 162 continues to rotate up to a rotation angle of 200 degrees, the main rod 48 moves 6 mm to the right in FIG. 4, completing the predetermined pressure bonding of the pinch roller 192 to the capstan 72. During this crimping operation, the meshing relationship between the partial gear 43 of the cam 162 and the first sector gear 45 is disengaged, so that the guide posts 23 and 27 are not subjected to the reaction force of the crimping against the fixing members 184 and 185. It is clear that the cam 162 is rotating. When the cam 162 further rotates to a rotation angle of 205 degrees, the cam lift curve in FIG. 10 enters a horizontal portion and a switch (not shown) is operated to stop the motor and stop the rotation of the cam 162. On the other hand, at this time, the capstan 72 rotates clockwise in FIG. 3, and the main idler 76 rotates counterclockwise in FIG. 3. Therefore, the belt 84, relay roller 82, and rotating arm 88 also rotate counterclockwise in FIG.
The idler gear 86 rotating clockwise in the figure meshes with the take-up reel idler gear 54a, and the take-up reel stand 10 rotates clockwise in FIG. With the cooperation of the capstan 72 and the magnetic tape 180 fed at a constant speed, the magnetic tape 180 is wound around the take-up reel hub 14 without slack, resulting in a recycle mode. If the stop button (not shown) is then pressed, the motor will reverse,
The drive gear 160 and the rotating body 142 are rotated counterclockwise and clockwise in FIG. 4, respectively, and the cam 162 starts rotating counterclockwise in FIG.
2 and capstan 72, and move the tape drawer members 182, 183 toward the cassette 20. Further, the capstan 72 rotates counterclockwise in FIG. 3, the idler gear 86 meshes with the supply reel idler gear 64a, and the supply reel stand 12 is
The magnetic tape is rotated counterclockwise in the figure to wind the drawn-out magnetic tape around the supply reel hub 16 without slack. Thereafter, when the cam 162 rotates to a rotation angle of 0°, the switch operates, stopping the rotation of the motor and stopping the cam 162.
The rotation of is also stopped, resulting in the stopped state shown in FIG.

Next, a second embodiment shown in FIGS. 11 to 13 will be described. The second embodiment differs from the first embodiment only in the pressing and fixing means at the position corresponding to the stopping mode of the magnetic tape pull-out means, which is the main requirement of the present invention, so only the configuration and operation of this pressing and fixing means will be described. do. As shown in FIGS. 12 and 13, a guide projection wall 47 is integrally provided on the surface of the cam 162 on which the partial gear 43 is provided, and at the same time, a guide wall 105, 1 is also provided on one surface of the first sector gear 45.
07 is integrally provided. In the stopping mode shown in FIG. 12, the cam 16 is located between the guide walls 105 and 107 of the first sector gear 45.
The structure is such that the position of the first sector gear 45 in the stopped state becomes a predetermined position by inserting the second guide projection wall 47. Also the 11th
As shown in FIG. 12, pins 121a and 121b are installed on the left side loading arm 87' and right side loading arm 99', respectively, and leaf springs 123a and 123b are installed on the pins 121a and 121b, respectively. is installed. Also, the left loading second arm 87'
Elongated holes 91' and 101' are formed at the ends of the second right loading arm 99', respectively.
They are in engagement with pins 93 and 103 set on tape pull-out members 182 and 183, respectively. And a pin 93 passing through the elongated holes 91' and 101',
103 is the leaf spring 123a in the stopped state;
123b and is further pressed. That is, when the first sector gear 45 is in a stopped state due to the cooperation between the guide protrusion wall 47 of the cam 162 and the guide walls 105, 107 of the first sector gear 45, as shown in FIG.
When positioned at a predetermined position as shown in FIG. 12, the second left loading arm 87' and the second right loading arm 99' interlocked with the first sector gear 45 are connected to the leaf springs 123a, 123b and the elongated hole 91'. , 101' in the direction of arrow A and the end in the direction of arrow B in FIG. Figure arrow A direction and B
The leaf spring 123 is placed along the elongated holes 91' and 101' in the direction.
By moving while deforming the leaf springs 123a and 123b, the pins 93 and 103 are moved against the fixed walls 115a and 11 by the reaction force caused by the deformation of the leaf springs 123a and 123b.
5b, and therefore the magnetic tape drawer member 1
82 and 183 are precisely positioned at the positions shown in FIG. In addition, pins 93, 103
Magnetic tape drawer members 182, 18 centered on
3 is controlled by the guide bosses 1 provided on the magnetic tape pull-out members 182 and 183 as in the first embodiment.
This is achieved by fitting guide grooves 17a, 119a and 117b, 119b into guide grooves 31 and 33, respectively.

Effects of the Invention As described above, according to the present invention, the magnetic tape pull-out means is attached to the end fixing wall of the guide groove by the elastic member at a position corresponding to the opening of the tape cassette through which the magnetic tape can be pulled out from the tape cassette. Since the configuration is such that the tape cassette is pressed and fixed and its position is determined with high precision, when the tape cassette is installed in the magnetic tape device main body, the guide post of the magnetic tape pull-out means comes into contact with the wall of the tape cassette, and the tape cassette and guide This prevents serious accidents such as damaging the post or contacting the magnetic tape and damaging the magnetic tape, and also prevents the position of the magnetic tape drawer member from changing due to vibration. Even if the front opening becomes smaller due to miniaturization, it is possible to reliably position the guide post of the magnetic tape pull-out means in relation to the opening, and there is also a margin for accuracy with respect to the cassette holder when installing the tape cassette in the device. The practical effects of this, such as the fact that it occurs, are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a surface view of the main parts of the first embodiment of the present invention in a stopped mode, FIG. 2 is a schematic sectional view of the reel drive system,
Figure 3 is a front view of the main parts in the reproducing mode, Figure 4 is a back view of the main parts in the stopped mode, Figures 5 and 6,
7 and 8 are explanatory diagrams of the operation of the drive section of the tape pull-out member, and FIG. 9 is a schematic sectional view of the drive section;
Figure 10 is a cam lift curve diagram, Figures 11 to 1
3 shows a second embodiment of the present invention, FIG. 11 is a rear view of the main part in a stopped mode, FIG. 12 is an explanatory diagram of the pressing fixing means of the magnetic tape drawer member, and FIG. 13 is a view of the magnetic tape drawer member. It is a schematic sectional view of a drive part. 20...cassette, 43...partial gear, 45...first
Sector gear, 48... Main rod, 49... Second sector gear, 53... Pressing pin, 63... Cam surface, 65... Fourth sector gear, 69... First loading gear, 75
...Third loading gear, 123a, 123b...
Leaf spring, 162...cam, 166...groove, 182,1
83... Tape drawer member, 184, 185... Fixing member.

Claims (1)

[Claims] 1. A reel hub having a built-in magnetic tape wound therein;
Using a tape cassette with an opening on the front,
The magnetic tape is pulled out from the tape cassette, and the magnetic tape is configured to be run along a magnetic head installed outside the tape cassette to record/reproduce signals, and a first position from which the magnetic tape in the tape cassette can be pulled out from the opening. and a second position where the magnetic tape can be drawn out of the tape cassette and attached to the magnetic head; and determining the position of the magnetic tape pull-out means at the first position. a first fixed wall; and a first fixed wall provided on the magnetic tape drawing means that rotationally biases the magnetic tape drawing means in the first position direction and presses and fixes the magnetic tape drawing means against the first fixed wall. a second fixed wall that determines the position of the magnetic tape pull-out means at the second position; A magnetic tape device, wherein the magnetic tape pull-out means is provided with a second elastic member that presses and fixes against the second fixed wall.