JPH034990Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a magnetic recording and/or reproducing device.

Prior Art As one of the magnetic recording and reproducing devices that automatically performs a tape loading operation, a loading pole is installed and is movable into a guide groove of the chassis by rotating a loading ring on the bottom side of the chassis. A loading pole support moves along a guide groove to a position where the loading pole is stopped by a stopper, and at this time, the loading pole pulls out the magnetic tape from the cassette and winds it onto the drum at a predetermined path. There is a device configured to load the In this device, the loading pole is
The tip of the downward protrusion protrudes a relatively long distance below the support base so that it will not tilt and remain vertically stable even if a force in the direction of falling is applied due to the tape tension when the tape is running. is configured to be locked by a stopper.

Regarding the loading ring, in order to prevent it from interfering with the mechanism that firmly regulates the position of the loading pole, there should be a gap between it and the bottom of the chassis that is equal to or larger than the length of the downward protrusion of the loading pole. It is provided. As described above, when the loading ring is disposed further below the lower protrusion of the loading pole, there is a problem in that it becomes difficult to reduce the thickness of the device.

Means for Solving the Problems The present invention provides magnetic recording and/or
Alternatively, the purpose is to provide a regeneration device, in which a loading pole support base on which a loading pole is installed moves along a guide groove of the chassis by rotation of an annular body on the bottom side of the chassis. In a magnetic recording and/or reproducing device in which a magnetic tape is pulled out of a cassette, wound around a drum having a video head, and loaded in a predetermined path, the annular body has an opening at a position facing the loading pole. The loading pole is disposed close to the lower surface of the chassis, the loading pole is shaped to have a downwardly extending portion extending through the support base, through the opening, and below the annular body; A position regulating member that regulates the position of the loading pole to the tape loading completion position is configured to include a locking portion that locks a portion of the downwardly extending portion of the loading pole that is below the annular body. It is something.

Embodiment Next, an embodiment of the magnetic recording and/or reproducing apparatus according to the present invention will be described.

FIG. 1 and FIG. 2 respectively show a magnetic recording/reproducing device 1.
3 and 4 are bottom views showing the states in the stop mode and the recording/playback mode, respectively.

In each figure, 2 is a chassis, 3 is a guide drum with a built-in video head, 4 is a full-width erase head, 5 is an audio control head, 6 is a capstan, 7 is a pinch roller, 8 is a supply reel disk, and 9 is a take-up In the reel disk, 10 and 11 are loading poles on the supply reel side, 12 are loading poles on the take-up reel side, 13 is a loading ring, and 14 and 15 are tape drawer vertical poles.

The tape cassette 16 is inserted into the housing 21 of the tape cassette mounting mechanism 20 shown in FIG.
are fitted into the corresponding reel discs 8 and 9 and mounted in a predetermined position. With the tape cassette 16 attached, the loading pole 10,
11, 12, vertical poles 14, 15, a vertical guide pole 74 on loading ring 13, and pinch roller 7 fit into an elongated opening 19 on the front side of tape cassette 16.

As shown in FIG. 5, the tape cassette mounting mechanism 20 has a housing 21 supported by support arms 24 and 25 which are pivotally supported by brackets 23 on the chassis 2.
The housing 21 is supported on the distal end side of the housing 21, and the housing 21 moves up and down between the cassette attachment position _S1 and the cassette removal position _S2 as the support arms 24 and 25 rotate. Further, the housing 21 is biased toward the detached position _S2 by a spring 26 hooked on the support arm 24. Note that when the cassette is attached, the claw portion 21a of the housing 21 is attached to the support arm 2.
The pin 28 of the hanging arm 27 connected to the mounting position S1 is locked in the mounting position _S1 .

Next, the mechanism around the idler will be explained. The idler 30, as shown in FIGS. 1 and 3,
It is rotatably supported by the tip of the arm 31 on the bottom side of the chassis 2, and is located at a position on the top side of the chassis 2.
The reel drive motor 3 connects the radially opposite parts to each other.
It is arranged to face the motor shaft 33 of No. 2 and the running vertical wall 34a of the running plate 34. The arm 31 is
It is connected to the tip of arm 35, and this arm 3
The base side of the chassis 2 is connected to an L-shaped idler crimp arm 37 that is pivotally supported by a pin 36 on the bottom side of the chassis 2. The arm 35 is bendable relative to the arm 37, and the arm 35 is provided with a spring 38 that applies a pressing force to the idler 30 against the motor shaft 33. Furthermore, when the plunger 39 is off, the L-shaped arm 37 is rotated counterclockwise in FIG. 1 and clockwise in FIG. 3 by the spring 40, and the idler 30 moves in the direction of arrow _Y1 . It is located at a position that is spaced apart from the motor shaft 33 and lightly abuts against the running vertical wall 34a. Note that since the idler 30 is spaced apart from the motor shaft 33, deterioration of the rubber over time that may occur in the pressed portion when the idler 30 is held in a pressed state against the motor shaft 33 can be avoided.

The running plate 34 has an L-shape, and its bent portion is pivotally supported on a pin 41 on the chassis 2 in common with a brake lever 42 for the supply reel disc, and is urged to rotate clockwise by a spring 45. There is. The take-up reel disk brake lever 43 has a substantially T-shape and is pivotally supported on a pin 44 on the chassis 2. Each brake lever 42, 43 has a spring 45, 46, respectively.
are biased counterclockwise and clockwise in FIG. 1, and when the plunger 39 is off,
Brake shoes 47 and 48 press against opposing reel disks 8 and 9. Also brake lever 4
3 arrow Y ₂ direction extending arm and running plate 34 arrow Y ₂
The directionally extending arm portions are connected to each other by a connecting plate 49 with some play.

Further, a pin 50 is implanted at the tip of the arm portion of the brake lever 42 extending in the direction of arrow _X1 . Another brake lever 43 has an arm extending in the direction of arrow _X2 to a position opposite the pin 50. The pin 50 hangs down to the lower surface of the chassis through the opening 51 of the chassis 2, and is connected to the pin 36 by the arm 3.
It is fitted into a rectangular frame portion 52a on the distal end side of one arm of an L-shaped brake release arm 52 which is pivotally supported in common with 7. The other arm portion of this arm 52 has the same shape as the arm 37 and overlaps with it. When the plunger 39 is off, the arm 52 is rotated counterclockwise in FIG. 1 and clockwise in FIG. 3 by the spring 53.

Next, we will discuss the loading ring mechanism in the sixth section.
This will be explained with reference to FIG. 7 and FIGS. 7A, B, and C.

The loading ring mechanism 60 is shown in FIG.
As shown in FIGS. 7A, B, and C, a loading pole traction plate 6 is attached to the loading ring 13.
1 and a cassette eject plate 62 are attached.

The loading ring 13 includes a support roller 63,
It is supported at three locations on the inner periphery by 64 and 65, and is rotatably supported on the lower surface side of the chassis 2 in a posture parallel to the chassis 2. Note that the loading ring 13 can be attached to the support roller 65 by loosening the screw 66.
The base 67 on which the
Turn counterclockwise in the figure to shift the roller 65 toward the guide drum, and in this state, the loading ring 13 is locked to the rollers 63 and 64, and then the roller 65 is moved to a state where it is engaged with the ring 13. It is assembled by letting it slide and fixing.

Further, as shown in FIG. 7B, the loading ring 13 has a gear portion 69 between P ₁ and P ₂ on the outer periphery.
A cam portion 70 for moving the full width erasing head between P ₁ and P ₃ ;
It has a shape in which a notch recess 71 is formed between P ₂ and _{P 4} .
The cam portion 70 is formed to protrude toward the outer peripheral side of the ring, and includes an inner arc portion 70a and inclined portions 70b and 70c on the starting end side and the terminal end side of the inner arc portion 70a. The cam portion 70 also includes an opening 72 through which the loading pole 10 passes vertically, and a detection means that is detected by an optical detection means (to be described later) and determines the rotational position of the loading ring in, for example, a playback mode. A small window 73 for detection is formed.

Further, the loading ring 13 has a guide pole 74 on its upper surface and a pin 75 on its lower surface for moving a pinch roller or the like in the final stage of the tape loading operation.

The loading pole traction plate 61 is the seventh
As shown in Figure A, it has a generally arcuate shape, and the lower end side in the figure is an upwardly stepped part 76 (see Figure 8), in which a rectangular long hole 77 is formed. This plate 61 is attached by fitting its pair of arcuate long holes into corresponding pins on the ring 13, and is moved in the direction of arrow _A1 by the spring force of a compression coil spring 78 inserted in a compressed state. They are biased and moving in the same direction. A hanging pin of a loading pole support, which will be described later, is inserted into the elongated hole 77.

As shown in FIG. 7C, the cassette ejecting plate 62 has a generally arcuate shape, with a predetermined section on the outer circumferential side serving as a gear portion 79. This plate 62, like the plate 61 described above, has a pair of arcuate elongated holes fitted into corresponding pins on the ring 13, so that it can be rotated independently of the ring 13 within the range of angle α. As will be described later, it rotates in the _two directions of arrow A independently of the ring 13 to perform the cassette eject operation. Note that the plate 62 is biased in the direction of arrow _A1 by a tension coil spring 80 stretched between the plate 62 and a part of the ring 13, and is moved in the same direction.
The plate 62 also has an eccentric pin 81 for tooth alignment adjustment.
The position is adjusted by , and each tooth of the gear portion 79 matches the tooth of the gear portion 69 . Also, the gear part 79
closes the notch recess 71 and closes the notch recess 7.
1 and extends at a predetermined angle in the direction of arrow _A1 . Furthermore, a pin 82 for rotating the eject arm is mounted on the plate 62.

In the stop mode, the loading ring mechanism 60 is in the rotational position shown in FIGS. 1 and 3, and the loading gear 83 faces the cutout recess 71 of the ring 13 and meshes with the gear portion 79 of the plate 62. ing.

Furthermore, two sets of light emitting elements and light receiving elements are provided with the loading ring 13 in between, and detect the rotational position of the loading ring 13. Specifically, a pair of light receiving elements 84a, 84b
is attached to the bottom of chassis 2, and
A pair of light emitting elements 8 are mounted on the bracket 85 on the bottom side of the
6a and 86b are attached to face the light receiving elements 84a and 84b, respectively. As described later, the light emitting element 86a and the light receiving element 84a are connected to the small window 73 for detection.
, and detects that the ring 13 has rotated to the loading completion position, and another light emitting element 86b and light receiving element 84b similarly detect the small window 73 to be detected, and in the pause mode (in the search mode). The rotational position of the ring 13 at is detected.

Next, the configuration around the supply side loading pole 10, which constitutes the main part of the present invention, will be explained in FIGS. 8 and 9.
This will be explained with reference to the drawings.

The loading pole support stand 90 is the chassis 2
It is placed on the chassis 2 across the loading guide groove 91 formed in the chassis 2, and is restricted from leaving the guide groove 91 by a plate 92 located on the bottom side of the chassis and screwed to the support base 90. In this state, the hanging portion 90a at the rear end and the loading pole 10 near the front end are guided by the guide groove 91 and slide along it. Note that the hanging pin 93 on the top side in the moving direction in the loading mode of the support base 90 is fitted into the elongated hole 77 of the loading pole traction plate 61 . Further, the loading pole 10 is fixed by passing through the support base 90, and its lower part is not restricted by the ring 13 but extends to a position below the ring 13 by passing through the opening 72 of the ring 13. There is. Corresponding to this configuration, a stopper member 9 for regulating the position of the loading pole 10 when tape loading is completed.
4 is configured such that the lower stopper 94a locks a portion _B1 of the pawl 10 that protrudes below the ring 13. Upper stopper 94b
is a part B ₂ that protrudes upward from the support base 90
It is at the height position where it locks. As will be described later, the loading pole 10 is locked at two locations separated from each other by a stopper member 94, and its position is stably regulated.

Further, an auxiliary support base 96 on which the inclined loading pole 11 is embedded is fixed to the support base 90 with screws.

The loading guide groove is composed of an arcuate loading guide groove 91 and a branch guide groove 91a that branches in the middle and into which the loading pole support 90 enters. As a means for allowing the loading pole support stand 90 to enter the branch guide groove 91a during the tape unloading operation, the loading pole support stand 90 is suspended and fixed to the guide plates 97, 98 and guide pins 99 fixed on the chassis, and the support stand 90. Pin 10 guided by the guide plate 97
0 is set. The guide plate 97 and the pin 100 constitute the main guide means, and the guide plate 98 and the guide pin 99 constitute the sub guide means.

Loading pole support stand 90 in stop mode
As shown in FIG. 1, the poles 10 and 11 are located in the branch guide groove 91a and rotated clockwise, and the poles 10 and 11 are aligned substantially parallel to the front surface of the cassette 16. Further, the pole 74 on the ring 13 is located deep inside the guide groove 91, and the poles 10, 1
1 and 74 are lined up on an imaginary line substantially parallel to the front surface of the cassette 16.

Next, the structure around the full-width erase head 4 will be explained with reference to FIGS. 10 to 12.

The full-width erase head 4 is moved from the support base 110 by the arrow
It is fixed on the arm portion 110a extending in the _X1 direction. The support stand 110 has its base fixed to a base stand 112 fixed on a bifurcated substrate 111, extends in the direction of arrow _X1 , and is guided by a guide rod 113 inserted through the support stand 110. The balls 114 and 115 on the lower surface side can slide on the substrate 111 and move in the directions of arrows X ₁ and X ₂ . In the stop mode, the support base 110 is moved in the direction of arrow _X1 by the tension spring 116, and the head 4 is moved in the direction of arrow X1 in FIG.
It is located at the operating position _C1 shown in FIG.

As shown in FIG. 12, the first ball 114 is
It fits into the hole 110b of the support stand 110, and the protrusion dimension from the lower surface of the support stand 110 is adjusted by the screw 117. Another ball 115 is attached to the support base 1
10 is inserted into another hole 110c, and the screw 1
18, and is biased in a direction protruding from the hole 110c by a compression coil spring 119 provided in the hole 110c.

Therefore, the ball 115 presses the opposing substrate 111 by the spring 119, and the support base 110
The guide rod 113 is biased in the direction of arrow D by a spring 119, and the ball 114 is also pressed against the opposing substrate 111. Therefore, even if the guide rod 113 is mounted with poor precision, the support base 110 is biased in the direction of arrow D by the spring 119, and the balls 114 and 115 are pressed against the corresponding substrate 11.
1, it moves smoothly without wobbling, and remains stable without wobbling even at the movement completion position. This means that assembly errors of the guide rod 113 and the like can be tolerated to some extent, and manufacturing costs can be reduced accordingly.

Here, the rotational position of the support base 110 in the direction of arrow D,
That is, the verticality of the head 4 can be changed by operating the screw 117, and the verticality of the head 4 can be varied by operating the screw 117 _.
The tape application surface 4a of the head 4 is adjusted to be perpendicular to the chassis 2. Further, as will be described later, due to the movement of the magnetic tape while being attached to the surface 4a, a rotational force is applied to the head 4 in the direction of arrow D, but the rotation of the head 4 in the same direction is stopped by the screw 117. ball 11
4, the inconvenience of the head 4 being tilted due to the action of the tape does not occur, and the head 4 is
remains vertical while the tape is running. However,
The tape adheres normally to the tape application surface 4a of the head 4, and erasing is performed satisfactorily.

Further, a pin 120 is implanted on the lower surface of the support base 110 so as to fit into a long hole 121 of the chassis 2. With this pin 120 locked to the end of the elongated hole 121, the head 4 is regulated at the operating position _C1 . Further, the pin 120 is fitted into an elongated hole 122a on the distal end side of the rotating arm 122 on the lower surface side of the chassis, and the arm 122 and the support base 110 are connected. The arm 122 has a substantially arc shape, and the other end is supported by a pin 123.
In the stop mode, it is in a rotational position roughly along the guide groove 91, as shown in FIG. Also, arm 1
A pin 124 that is locked by the cam portion 70 of the loading ring 13 is installed in the middle of the ring 22 .

Next, the tape loading operation and the like of the above magnetic recording/reproducing apparatus 1 will be explained.

In the stop mode, the device 1 is in the state shown in FIGS. 1 and 3. That is, loading ring 13
is rotated counterclockwise, and the loading poles 10, 11 and guide pole 74 are located within the opening 19 of the cassette 16. Furthermore, loading pole 12, pole 14,1
5. The pinch roller 7 is also located within the opening 19. Tension arm 130 has rotated counterclockwise about pin 131, tension pole 132 has moved in the direction of arrow _X2 , and brake band 133 relative to supply reel disc 8 has relaxed.

When recording or playing, the reel drive motor 3
2 and the loading motor 134 are started, and the plunger 39 is operated.

When the plunger 39 operates, the arm 135 rotates counterclockwise in FIG. 1 (clockwise in FIG. 3) about the pin 136, and the idler crimp arm 37
The brake release arm 52 is locked to the arm 135 and rotates clockwise in FIG. 1 (counterclockwise in FIG. 3). The rotation of the arm 37 causes the idler 30 to move in the direction of arrow _Y2 and press against the motor shaft 33, which is rotating in the direction of arrow _E1 . Further, the running plate 34 is rotated clockwise by the spring 45, and the running vertical wall 34a maintains a state in which it is pressed against the peripheral surface of the idler 30. Therefore, the rotation of the motor shaft 33 is transmitted to the idler 30, and the rotation of the motor shaft 33 is transmitted to the idler _30.
When rotating in the direction of arrow X1, it rolls on the running vertical wall 34a and moves in the direction of arrow _X1 , and as shown in FIG. The disk 9 is rotated in the tape winding direction indicated by arrow G.

Further, as the arm 52 rotates, the brake lever 42 rotates clockwise, and the brake lever 43 is locked by the pin 50 and rotates counterclockwise.
The brake shoes 47 and 48 are separated from the corresponding reel disks 8 and 9, and the braking on each reel disk 8 and 9 is released.

In addition, especially with the rotation of the second half of the brake lever 43, the connecting plate 49 is pulled in the direction of arrow _X1 , the traveling plate 34 is rotated counterclockwise, and the vertical wall 34 for traveling
a is spaced apart from the peripheral surface of the idler 30. Thereby, during the rotation transmission operation by the idler 30, the idler 30 rotates in a state where the load from the running vertical wall 34a is released.

In addition, the rotation of the loading motor 134 is controlled by the pulley 137, belt 138, pulley 139, worm 140, worm wheel 141, gear 14.
2,143 to the loading gear 83, which rotates in the direction of arrow _H1 . As the loading gear 83 rotates, the loading ring mechanism 60 is first engaged with the gear portion 79 and then with the gear portion 69, and rotates in the direction of arrow _A1 , thereby performing a tape loading operation as described below. .

At the time of initial rotation of the loading ring mechanism 60,
As shown in FIGS. 3 and 4, the L-shaped arm 150 on the bottom side of the chassis is connected to the pin 15 on the ring 13.
Following the movement of 1, the spring 152 rotates clockwise around the shaft 153 together with the shaft 153. Further, the supply reel side loading small arm 154 on the upper surface side of the chassis, which is coaxially connected to the arm 150 by the shaft 153, rotates counterclockwise in FIG. 1, and the pole 14 locks the magnetic tape 155. and pull it out of the cassette. Further, as shown in FIGS. 3 and 4, the arm 156 on the underside of the chassis rotates the pin 157 clockwise with respect to the pin 159 by the spring 158 while being guided by the inclined portion 70c of the cam portion 70. Following the rotation of the arm 156,
The spring 160 causes the V-shaped arm 161 to be attached to the shaft 16.
2, the link 163 moves in the direction of the arrow _X1 , and the L-shaped arm 164 rotates clockwise around the shaft 165 together with the L-shaped arm 164. A gear 166 on the upper side of the chassis fixed to the upper part of the shaft 165 rotates counterclockwise together with the arm 164, and the gear with arm 167 rotates clockwise with respect to the shaft 168 until it is stopped by the stopper 175. As it rotates, the pole 15 locks the magnetic tape 155 and pulls it out of the cassette.

The tip of the arm 156 is connected to a link 169 on the upper side of the chassis and an arcuate hole 17 in the chassis 2.
They are connected by a pin 171 that is loosely fitted in the 0. The other end of the link 169 is connected to a loading arm 173 which is supported by a shaft 172 and has an inclined loading pole 12 planted at its tip. Therefore, as the arm 156 rotates, the loading arm 173 rotates to the final position where it is stopped by the stopper 174, as shown in FIG. At this time, the inclined loading pole 12 locks the magnetic tape 155 and pulls it out of the cassette.

As described above, the tape loading operation at the initial stage is completed, and the magnetic tape 155 is guided at both ends by the poles 14 and 15 and by the inclined loading pole 12 in the middle, as shown by the two-dot chain line in FIG. , attached to a part of the circumferential surface of the guide drum 3,
A tape path 155A is sequentially attached to the tape guide member 176, head 5, and guide pole 177 from the pole 12 toward the pole 15. That is, the tape path on the take-up reel side is completed at the initial stage of the tape loading operation.

Here, the tape guide member 176 is wide in the tape running direction and has an upper flange portion and a lower flange portion that guide the upper and lower edges of the tape 155, respectively. It is mounted vertically. Therefore, the tape 155 is guided by the upper and lower side edges at a location close to the guide drum 3, and its height above the chassis is regulated. Moreover, since the tape 155 is guided over a relatively long length along the upper and lower side edges, its position is more reliably regulated, and the tape feeding operation by the loading poles 10 and 11 prevents the tape from shifting as will be described later. It is performed without any accompaniment.

When the loading ring mechanism 60 rotates further, the loading pole support base 90 moves to the plate 6.
1, it escapes from the branch guide groove 91a and moves along the guide groove 91. During this movement, the loading poles 10 and 11 lock the magnetic tape 155, pull it out from the cassette 16, and draw it around the guide drum 3.

When the rotation of the ring 13 progresses halfway, the inclined portion 70b of the cam portion 70 contacts the pin 124 and pushes it away in the direction of arrow _X2 , causing the arm 122 to move counterclockwise in FIG. direction). By rotating the arm 122, the support stand 110
The head 4 moves in the direction of arrow _X2 against the spring 116, and the head 4 moves to a position _C2 shown by a chain double-dashed line in FIG. The pin 124 is subsequently guided to the arcuate portion 70a, the arm 122 is maintained in the above rotational position, and the head 4 is maintained in the retracted position _C2 .

When the ring 13 rotates to the stage where the rod ink pole 10 has passed the head 4, the pin 124
is guided by the inclined portion 70c, the arm 122 rotates clockwise in FIG _.
direction and return to operating position _C1 .

As shown in FIGS. 2 and 4, the ring 13 rotates to the final position where the small detection window 73 faces the light receiving element 84a and the light emitting element 86a and is detected by the light receiving element 84a.

As the ring 13 rotates at the final stage, the lever 180 is locked to the pin 75 and rotated counterclockwise in FIG. 2 (clockwise in FIG. 4), and the pinch roller 7 is pressed against the capstan 6. , and the tension arm 130 becomes operational.

That is, by rotating the lever 180, the link 18
1 is pulled in the direction of arrow _X2 , and the levers 182 and 183, which are bent in a V shape as shown in FIG. , the pinch roller support arm 184 rotates clockwise about the shaft 168 against the spring 185, and the pinch roller 7 comes out of the opening 19 and presses against the capstan 6. Further, the L-shaped lever 186 rotates counterclockwise against the strong pinch roller pressing spring 187 and separates from the stopper 188. The pressing force of the pinch roller 7 against the capstan 6 is applied by a spring 187.

Further, due to the rotation of the lever 180, the link 189 is pushed in the direction of arrow _X2 , and the T-shaped arm 1
90 rotates against the spring 191 as shown in FIG. As a result, the pin 192 of the tension arm 130 is released from the lock by the arm 190, and the tension arm 130 is rotated clockwise by the spring 193 as shown in FIG. Chillon Paul 132
comes into contact with the tape.

Furthermore, the vertical load ink pole 10 is locked to the stopper member 94. The ring 13 further rotates independently of the plate 61 while compressing the compression coil spring 78. Paul 10 is spring 7 at this time.
8 is pressed against the stopper member 94 by the spring force stored by the compression. Note that since the elongated hole 77 coincides with the radial direction of the loading ring 13,
The pulling force of the support stand 90 by the plate 61 is determined by the elongated hole 7.
No force is applied at the location 7, and the traction force acts as it is as a force to press the pole 10 against the stopper member 94. That is, the spring force of the spring 78 is used to efficiently press the pole 10 against the stopper member 94. In addition, as shown in FIG. 8, the pole 10 is placed at two locations B ₁ and
Since B ₂ is locked by the stoppers 94a and 94b, the position is regulated more precisely than in the past.

Further, the guide pole 74 moves within the guide groove 91 and reaches the position shown in FIG.

With the above steps, the tape loading operation is completed.
The apparatus 1 is in the state shown in FIGS. 2 and 4. The magnetic tape 155 is pulled out from the supply reel 17 and out of the cassette 16, guided by the pole 14, tension pole 132, and guide pole 74 in order, attached to the erasing head 4, and guided to the vertical loading ink pole 10. , is spirally attached to the peripheral surface of the drum 3 over a predetermined angle range regulated by the inclined load ink poles 11 and 12, is guided by the tape guide member 176, the guide pole 177, and the pole 15, and is inserted into the cassette 16. The tape enters and is loaded onto the tape path 155B that reaches the take-up reel 18.

Here, erase head 4 and tension pole 13
The tape between the guide drum 3 and the guide drum 3 is guided by a guide pole 74 to form a tape path separated from the circumferential surface of the guide drum 3. Here, the guide pole 74 has a simple structure that is simply implanted in the ring 13, and moves behind the rhodeink pole 10, so it does not interfere with the movement of the rhodeink pole 10. Note that if a pole corresponding to the guide pole 74 is provided on the chassis, a mechanism for retracting the pole so as not to obstruct the passage of the loading pole is required, resulting in a complicated structure. . However, if it is provided on the ring 13 as in this embodiment, the above problem can be solved.

Further, the tape 155 separated from the drum 3 is guided by the inclined load ink pole 12, and its attitude is corrected so that its surface is perpendicular to the chassis. The posture corrected tape is Paul 12
The tape running height is corrected by the tape guide member 176 (having an upper flange for guiding the upper edge of the tape and a lower flange for guiding the lower edge) adjacent to the tape so as to be at a predetermined height position from the chassis. . The attachment surface of the tape guide member 176 is a smooth, substantially arc-shaped surface that is long in the tape running direction, and the tape 155 runs along the attachment surface to effectively stabilize its running. Ru. Therefore, a tape whose running is stabilized is attached to the audio control head 5.

Also, the capstan 6 is connected to the capstan motor 1.
95 rotates integrally with a flywheel 197 via a belt 196. magnetic tape 155
is held and driven by the pinch roller 7 and the capstan 6 and runs in the forward direction along the tape path 155B, and while it runs along the circumferential surface of the guide drum 3, a video signal is recorded or played back by the video head. .

The erasing head 4 is located close to the guide drum 3 along the tape path, and the tape portion erased by the erasing head 4 reaches the drum 3 in a very short time after the insert operation. Therefore, the so-called waiting time from the time of the insert operation to the time of starting the insertion is shortened, and the insert operation is performed quickly.

Further, the tape 155 is guided by the vertical poles 14 and 15 at the outlet and inlet sides of the tape cassette 16, respectively, so that the tape 155 is separated from the tape guide portions 198 and 199 of the cassette 16, so that the accuracy of the tape cassette is Regardless, it remains exactly perpendicular to the chassis and runs stably along the tape path outside the cassette.

In addition, when the tape is drawn over a large angle by the above-mentioned rod ink poles 10 and 11,
Due to the inclination direction of the load ink pole 11, a force is applied to the tape 155 that is latched to the pole to shift toward the top of the pole 11, and unless special measures are taken, the tape will not move when the tape loading is completed. The rod ink pole 11 is shifted toward the top side, and the tape path on the drum circumferential side becomes a tape path with the entrance side shifted upward. Once the tape starts running, the tape path that has deviated from this predetermined position is gradually pulled back to the normal tape path direction, but this takes several seconds, and during this time, normal recording and playback cannot occur; The start of the operation will be delayed accordingly, and furthermore, wrinkles etc. will occur in the tape 155. Therefore, in this embodiment, as described above, the tape feeding operation by the inclined load ink pole 11 is performed after the tape path on the take-up reel side is completed. That is,
During the tape feeding operation stage, the tape on the exit side of the drum 3 is in a state where the height position is regulated by the tape guide member 176, and the tape held on the pole 11 is also in a state where it is difficult to shift in the height direction. becomes. Therefore, the tape 155 is drawn along the pole 11 without shifting, and when tape loading is completed, the tape 155 is loaded in the normal tape path in the height direction as well, and normal recording and playback operations begin immediately after loading. will be started.

Further, as described above, in the tape loading operation, the supply-side load ink poles 10 and 11 move a long distance to perform most of the operation of winding the tape around the guide drum 3, and the take-up side load ink The pole 12 is moved a very short distance. Therefore, there is no need for a loading ring for moving the winding-side loading ink pole 12, and the arm 173 is sufficient, and the apparatus 1 becomes thinner and lighter. Furthermore, if the moving distance of the take-up side load ink pole 12 is short, even if the tape loading operation is performed when the amount of tape wound on the take-up reel 18 is small, the tape on the take-up reel 18 will not reach the end. The risk of the tape being stretched by being pulled out is reduced, which is advantageous.

When a pause operation is performed during the recording or playback mode described above, or a search operation is performed during the playback mode, the loading ring 13 rotates a little in the direction of arrow _A2 to the position where the small detection window 73 is detected by the light receiving element 84b. move. As a result, the lever 180 is slightly rotated counterclockwise in FIG. 4, the pinch roller 7 is separated from the capstan 6, and the tension pole 132 is separated from the tape.

Furthermore, when a stop operation is performed during recording or playback mode, the loading motor 134 reverses and the loading ring mechanism 60 rotates in the direction of arrow _A2 to the position shown in FIGS. Each member that has performed the loading operation operates in the reverse order and in the opposite direction to the loading operation, and tape unloading is performed.

In particular, regarding the operation of the erasing head 4, the pin 124 is connected to the inclined portion 70 of the cam portion 70 of the ring 13.
The arm 122 rotates counterclockwise in FIG. 2 while being guided by the arrow C, and the erasing head 4 moves in the direction of arrow _X2 and retreats. Here, the erasing head 4 is chased by the load ink pole 10 and retreats by moving in substantially the same direction as the movement direction of the load ink pole 10 at the beginning of the unloading operation (approximately in the direction of arrow X ₂ ). This means that the time required from the start of unloading to the completion of unloading may be longer than when retracting in a direction substantially perpendicular to the moving direction of the loading ink pole. In connection with this, the inclined portion 70c of the cam portion 70 has a gentle slope, and the movement of the erasing head 4 in the direction of arrow _X2 by the inclined portion 70c is performed by the motor 1.
This is done smoothly without any sudden increase in the load of 34.

When the rod support pole support 90 is pushed by the plate 61 and returns beyond the position indicated by the two-dot chain line in FIG. 2, the pin 100 is guided by the guide plate 97, and
and a support stand 90 guided by guide pins 99.
changes the direction of movement and enters the branch guide groove 91a. Note that the elongated hole 77 of the plate 61 is connected to the support base 9.
0 in the direction of the guide groove 91, and the pushing force in the direction of the branch guide groove 91a is small, making it difficult for the support base 90 to enter the branch guide groove 91a. It is guided and reliably enters the branch guide groove 91a. When the support stand 90 enters the branch guide groove 91a, the rod ink poles 10, 11 and the guide pole 74 are aligned as shown in FIG.

When the ring machine mechanism 60 returns to the above position, the plunger 39 is demagnetized, the idler 30 is returned to the center by the spring 40, and the brake shoes 47 and 48 are moved to the reel disks 8 and 9, as shown in FIG. This causes the brake to be applied. Note that the spring 40 for returning the arm 37 can be omitted, and if the spring 40 is omitted, the plunger 3
9 is demagnetized, the idler 30 remains in the position shown in FIG. In this case, the idler 30 is returned to the center position by reversing the motor 32.

Further, when a fast forward operation is performed during the stop mode, the idler 30 moves to the position shown in FIG. 2 in the same manner as in the above case. When rewinding, the plunger 39
is energized, the motor 32 rotates in the direction of arrow _E2 , and the idler 30 moves to a position where it presses against the supply reel disk 8.

Further, when a cassette eject operation is performed in the stop mode, the loading motor 134 rotates in the same direction as in the unloading operation described above, and the loading gear 83 rotates in the direction of arrow _H2 . At this time, the loading gear 83 faces the notched recess 71 of the ring 13 and meshes with the gear portion 79 of the plate 62, as shown in FIG.
Therefore, the ring 13 does not rotate and the plate 62
is independent of the ring 13 and acts as an arrow against the spring 80.
A Move in _two directions. As the plate 62 moves independently, the lever 200 is engaged with the pin 82 on the plate 62 and rotates counterclockwise, the lever 202 rotates clockwise, and the link 203 is rotated as shown in FIG. When pulled in the direction of arrow _X1 , the L-shaped lever 204 rotates counterclockwise, and the eject lever 205 moves in the direction of arrow _Y1 against the spring 206. By moving the lever 205, the hanging arm 2
7 is locked and rotates clockwise against the spring 204 in FIG.
Housing 21 is unlocked and spring 26
, and the tape cassette 16 is removed from the mounting section.

After the cassette eject operation, the gear 83 is indicated by the arrow
The plate 62 is rotated in the _H1 direction and returned to its original position.

Therefore, the cassette ejecting operation is performed without the use of a dedicated plunger. Furthermore, since the loading ring 13 does not rotate, the overall configuration of the device 1 is not affected by the ejection operation.

Effects As described above, the magnetic recording and/or reproducing device of the present invention has the following features.

Even if the loading pole is extended downward from the support base so that the position of the loading pole is stably regulated, the position of the annular body is not restricted by the loading pole.
Since the loading pole is disposed close to the bottom surface of the chassis, it is possible to achieve both stable position regulation of the loading pole and thinning of the device, which could not be achieved at the same time in the past.

Since the annular body is close to the bottom surface of the chassis,
The toroidal support pole installed in the chassis may be short, and the toroidal body can be supported more stably.

[Brief explanation of drawings]

FIGS. 1 and 2 are plan views showing an embodiment of the magnetic recording and/or reproducing apparatus according to the present invention in stop mode and recording/reproducing mode, respectively, and FIGS. 3 and 4 are A bottom view of the chassis as seen from the underside in the states shown in FIGS. 1 and 2, respectively, FIG. 5 is a diagram showing the tape cassette mounting mechanism, and FIG.
A plan view showing the loading ring mechanism taken out from the figure and set in the rotational position in the stop mode, FIG. 7 A, B, and C are parts that constitute the loading ring mechanism of FIG. 6, respectively. FIG. 8 is a plan view showing the loading ink pole traction plate, loading ring, and cassette ejecting plate in correspondence with each other; FIG. 8 is a plan view showing the loading ink pole mechanism on the supply side in correspondence with the stopper member;
9 is a cross-sectional view taken along the line in FIG. 1, and FIG. 9 is a cross-sectional view taken along the line in FIG. 1, and FIGS. 10 and 11 are respectively deleted. A plan view and a front view showing the head moving mechanism taken out, Figure 12 is XII in Figure 10.
It is a sectional view taken along line -XII. 1... Magnetic recording/reproducing device, 2... Chassis, 3...
Guide drum, 4...full width erase head, 5...audio control head, 6...capstan,
7... Pinch roller, 8... Supply reel disk, 9
... Winding reel disk, 10... Vertical loading pole (supply side loading ink pole), 11... Inclined loading ink pole (supply side loading ink pole), 12... Inclined loading ink pole (winding side loading ink pole), 13 ...loading ring,
DESCRIPTION OF SYMBOLS 14, 15... Tape drawer vertical pole, 16... Tape cassette, 17... Supply reel, 18... Take-up reel, 20... Tape cassette mounting mechanism, 60... Loading ring mechanism, 61... Loading ink pole traction plate, 72... Opening , 83...Loading gear, 90...Loading pole support stand, 91
...Loading guide groove, 91a... Branch guide groove, 94... Stopper member, 94a... Lower stopper, 94b... Upper stopper, 134... Loading motor, 155... Magnetic tape.

Claims (1)

[Scope of utility model registration request] As the annular body on the bottom side of the chassis rotates, the loading pole support base on which the loading pole is installed moves along the guide structure of the core chassis, pulling the magnetic tape out of the cassette and winding it around the drum with the video head. In a magnetic recording and/or reproducing device that is loaded in a predetermined path, the annular body is disposed close to the lower surface of the chassis in a shape with an opening at a location opposite to the loading pole;
The loading pole is shaped to have a downwardly extending portion that extends below the annular body through the support base and through the opening, and the loading pole is positioned at a tape loading completion position. A magnetic recording and/or reproducing device configured such that the position regulating member has a locking portion that locks a portion of the downwardly extending portion of the loading pole below the annular body.