JP2948997B2 - Slide mechanism of magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a slide mechanism of a magnetic recording / reproducing apparatus which slidably supports a slide chassis supporting a cassette with respect to a base chassis mounted on a main body of the apparatus.

[0002]

2. Description of the Related Art Among magnetic recording / reproducing apparatuses, there is a so-called 8-mm video as an apparatus using a magnetic tape. This 8
In millimeter video, a slide chassis can store and hold a cassette case around which a magnetic tape is wound.
Then, the slide chassis can be moved to a cassette attaching / detaching position where the slide chassis protrudes outward from the video main body by a built-in elevating mechanism to insert and remove the cassette case, and can be moved to a recording / reproducing position by a slide mechanism inside the video main body. At this recording / reproducing position, the magnetic tape in the cassette case can be pulled out and run to record or reproduce.

A loading mechanism for pulling out a magnetic tape from a cassette case and winding it around a rotary head drum is mounted in the 8-mm video apparatus. The loading mechanism operates as the slide chassis moves to the recording / reproducing position and performs tape loading. At least a pair of guide posts are movably provided on both sides of the rotary head drum. Draws out the magnetic tape in the cassette case and winds it around the rotary head drum at a predetermined angle.

When a cassette case around which a magnetic tape is wound is inserted into a cassette holder provided on a slide chassis in an ejected (cassette detachable) state and lowered, the slide chassis is moved to a recording / reproducing position in the video main body. Slide to. At this time, the magnetic tape in the cassette case is pulled out from the supply reel by the at least one pair of guide posts being moved by the loading mechanism, and is wound around the rotary head drum by a predetermined angle. And
In this state, when the recording or reproduction switch is turned on, the magnetic tape runs and recording or reproduction is performed.

[0005]

In the above-described conventional magnetic recording / reproducing apparatus, as described above, the slide chassis is moved between the cassette attaching / detaching position and the recording / reproducing position by the slide mechanism in the video main body with respect to the base chassis. It is possible to move between. In this slide mechanism, a pair of front and rear support shafts are respectively provided on both sides of the base chassis, while long holes along the moving direction are formed on both sides of the slide chassis in front and rear corresponding to the pair of support shafts. The slide chassis is slidable with respect to the base chassis by movably inserting the support shafts into the elongated holes. The base end of the drive arm is pivotally supported by the base chassis, and the distal end is connected to the slide chassis. The slide arm can be moved by rotating the drive arm by a cam gear that can be driven and rotated.

[0006] Such a magnetic recording / reproducing apparatus has a complicated mechanism due to the incorporation of various kinds of mechanisms, and the apparatus itself is reduced in size and thickness in order to reduce the size and weight of the apparatus itself. , And the layout also takes this into account. On the other hand, since the cassette housing the magnetic tape is supported by the slide chassis, it must be reliably movably supported with respect to the base chassis. The drive arm regulates the moving position of the slide chassis and must be mounted on the base chassis with high positional accuracy.

However, in a conventional magnetic recording / reproducing apparatus, each support shaft of the base chassis is simply inserted into an elongated hole of the slide chassis to support the slide chassis so as to be slidable with respect to the base chassis. On the other hand, the drive arm is also pivotally supported on the base chassis by the support shaft, and the slide mechanism and the drive mechanism of the slide chassis are attached to the base chassis independently of each other. However, there is a problem that the positioning accuracy is insufficient, and it is difficult to assemble the respective members to improve the positioning accuracy.

The present invention has been made to solve the above-mentioned problems, and a magnetic recording / reproducing apparatus for improving the positioning accuracy of a slide chassis at a movement stop position, reducing the size and weight of the apparatus, and reducing the cost. It is an object of the present invention to provide a slide mechanism.

[0009]

Means for Solving the Problems] sliding mechanism of a magnetic recording and reproducing apparatus of the present invention for achieving the above object, the device
Support each side of the base chassis mounted inside
The slide shaft that supports the cassette while the
A long hole is formed along the moving direction in the
Sliding on the base chassis by being inserted into the long hole
The chassis is slidably supported, and the
Drive chassis and slide chassis
The driving gear is connected by a cam gear that is connected and rotatable.
When the slide chassis is rotated, the slide chassis
It can be moved between a detachable position and a recording / reproducing position, and
At a predetermined time, it is locked to the rotating body on the magnetic tape take-up reel side.
To restrict rotation of the take-up reel in the tape unwinding direction.
Magnetic brake with jet brake and its release lever
In the recording / reproducing apparatus, a base end of the drive arm is connected to the base.
One of the support shafts erected on the base chassis
And the proximal end of the release lever is
And supported rotatably by the supporting shaft .

[0010]

[0011]

The rotation support shaft at the base end of the drive arm is shared with one of the support shafts for movably supporting the slide chassis erected on the base chassis .
By sharing the rotation support shaft of the base end with the other support shaft ,
The positioning of the slide chassis at each movement stop position can be accurately performed, and the size and weight of the apparatus can be reduced and the cost can be reduced by sharing the slide chassis.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view of a slide chassis showing an ejected (cassette detachable) state in an 8 mm video provided with a slide mechanism of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 shows a loading state. FIG. 3 is a plan view of a slide chassis showing a tape running state, FIG. 4 is a plan view of a base chassis showing an ejected (cassette detachable) state in an 8 mm video, and FIG. 5 is a base chassis showing a loading state. 6 is a plan view of a base chassis showing a tape running state, FIG. 7 is a plan view showing a loading mechanism, FIG. 8 is a schematic view showing a loading operation state, FIG. 9 is a perspective view of a cassette holder, and FIG. Holder plan view, Fig. 1
1 is a right side view of the cassette holder, FIG. 12 is a left side view of the cassette holder, FIGS. 13 and 14 are left and right side views of the cassette holder showing the cassette storage state, FIG. 15 is a front view of the cassette holder, FIGS. FIG. 17 shows an operation description showing the positional relationship between the cassette case and the rotary head drum.

In this embodiment, an explanation will be made using an 8 mm video as a magnetic recording / reproducing apparatus equipped with a slide mechanism of the magnetic recording / reproducing apparatus. The cassette holder can be protruded outward from the video main body by the elevating mechanism, and the 8 mm video can be slid to the recording / reproducing position with respect to the base chassis of the video main body by being supported by the slide chassis. I have. In this embodiment, the front or the front is the side where the cassette case is inserted into the cassette holder, and the rear or the rear is the opposite.

First, the cassette holder and its elevating mechanism will be described with reference to FIGS. 9 to 17, various members relating to driving of the magnetic tape mounted on the slide chassis are omitted.

As shown in FIG. 9, the magnetic tape 1 is housed in a box-shaped cassette case 2 wound around a supply reel 3 and a take-up reel 4. The magnetic tape 1 is exposed by opening the front lid 5 upward, and loading is possible. As shown in FIGS. 9 to 12, the cassette holder 11 has a box shape with front and rear openings, and the cassette case 2 can be inserted from the front (left side in FIG. 11) opening. A stopper 12 for regulating the position of the inserted cassette case 2 is formed on the right side of FIG. Further, supporting portions 13 and 14 for supporting the cassette case 2 are formed at lower portions on both sides of the cassette holder 11. On the other hand, the slide chassis 15 has a box shape with an opening at the top, and the cassette holder 11 has a lifting mechanism 1 provided on both left and right sides.
It is supported by 6 and 17 so as to be able to move up and down.

As shown in detail in FIG. 11, the lifting mechanism 16 includes a pair of arms 19 and 20 having an intermediate portion connected in an X-shape by a connecting shaft 18.
0 is the cassette holder 1 by the pivots 21 and 22.
1 and the slide chassis 15, and a rear end portion is connected to the slide chassis 15 and the cassette holder 11 by long holes 23 and 24 and support shafts 25 and 26. A spring 27 is provided between the pair of arms 19 and 20.
Are stretched, and are urged in the direction in which the arms 19 and 20 stand.

As shown in detail in FIG. 12, the other lifting mechanism 17 includes a pair of arms 29 and 30 having an intermediate portion connected in an X-shape by a connecting shaft 28.
0 is the cassette holder 1 by the pivots 31 and 32.
1 and the slide chassis 15, and the rear end is connected to the slide chassis 15 and the cassette holder 11 by long holes 33 and 34 and support shafts 35 and 36. A spring 37 is provided between the pair of arms 29 and 30.
Are erected, and are urged in the direction in which the arms 29 and 30 stand.

Therefore, as shown in FIGS. 11 to 14, the cassette holder 11 is provided with the arms 19 and 2 of the lifting mechanism 16.
When the arm 29 and 30 of the elevating mechanism 17 and the elevating mechanism 17 are moved up and down, they can be moved up and down while maintaining a substantially horizontal state.

The left and right elevating mechanisms 16 and 17 are operated at substantially the same speed on the cassette holder 11, that is, the elevating mechanisms 16 and 17 are operated.
A synchronizing mechanism for synchronizing 17 is provided. As shown in FIGS. 9, 11, and 12, racks 38, 39 are formed on one of the arms 20, 30 of the elevating mechanisms 16, 17 along upper rear ends thereof. Pinions 40 and 41 meshing with the respective racks 38 and 39 are rotatably mounted on the sides thereof, and the pinions 40 and 41 are connected by a connecting rod 42 so as to rotate integrally.

Therefore, when the cassette holder 11 is vertically moved up and down by the elevating mechanisms 16 and 17, when the arms 20 and 30 are rotated, the pinions 40 and 41 are passed through the racks 38 and 39.
Are respectively rotated, and the pinions 40, 41
Are connected by the connecting rod 42, they rotate in synchronization with each other, and the left and right elevating mechanisms 16 and 17 operate at substantially the same speed, and the cassette holder 11 is twisted or inclined at the time of elevating and lowering. Nothing.
Then, in the elevating mechanisms 16 and 17, the arms 20, 3
0, that is, the side on which the racks 38, 39 are formed, is connected to the cassette holder 11 by the slots 24, 34 and the support shafts 26, 36.
39 is a pinion 40 while sliding and moving with the rotation.
41 is rotated at an increased speed.
The left and right synchronization is assured.

As described above, the left and right lifting mechanisms 1
6 and 17, each arm 19, 20 and arm 2
Springs 27 and 37 are stretched on 9, 30 respectively.
The cassette holder 11 is lifted by the springs 27 and 3.
7, the cassette holder 11 generates an impact or vibration. Therefore, the elevating mechanisms 16 and 17 include the cassette holder 11.
A damper mechanism 43 for reducing shock and vibration at the time of lifting and lowering to operate slowly is provided.

That is, as shown in FIG. 12, in the slide chassis 15, a slide member 45 having a rack 44 formed on the upper portion is provided at the rear side of the lifting mechanism 17 so as to be movable back and forth (right and left in FIG. 12). It is supported and one end is connected to the rear end of the arm 29. A pinion 46 meshing with the rack 44 is rotatably mounted on the side of the slide chassis 15, and an oil damper 47 is mounted on the pinion 46.

Therefore, when the cassette holder 11 is lifted by the lifting mechanism 17, the arms 29 and 30 are turned in the direction in which the arms 29 and 30 stand by the urging force of the spring 37. At this time,
The rear end of the arm 29 moves forward together with the slide member 45, and rotates the pinion 46 via the rack 44 of the slide member 45. The rotation of the pinion 46 becomes gentle by the action of the oil damper 47, and the cassette holder (11) Shock and vibration at the time of ascending and descending can be reduced to operate slowly.

Further, one lifting mechanism 17 has each arm 2
A lock mechanism 48 for holding the cassettes 9 and 30 in a tilted state, that is, the cassette holder 11 in a lowered state, is provided. As shown in FIG. 12, in the slide chassis 15, a hook 50 is rotatably attached to a side portion on the side of the elevating mechanism 17 by a shaft 49, and is counterclockwise rotated by a spring 51 stretched between the slide chassis 15 and the hook 50. Biased in the direction. A shaft 52 is located adjacent to the hook 50.
As a result, the regulating plate 53 is rotatably mounted, and is urged in a counterclockwise direction by the spring 54, and the distal end of the regulating plate 53 comes into contact with the hook 50, thereby rotating the hook 50 against the urging force of the spring 51. And held at the release position (the position shown in FIG. 12). On the other hand, a downwardly extending portion is formed integrally with the arm 30, and a locking pin 55 is fixed to this extending portion. In addition, hook 50
A release lever 105 is formed on a base chassis 71, which will be described later, which slidably supports the slide chassis 15.

Therefore, the cassette holder 1 shown in FIG.
When 1 is lowered from the raised position (the arms 29 and 30 are raised), the arms 29 and 30 are tilted and the locking pin 55 is lowered. Then, the locking pin 55 is
3, the hook 50 is pressed down against the urging force of the spring 54, and the hook 50 held at the release position by the restricting plate 53 is rotated counterclockwise by the urging force of the spring 51. Therefore, as shown in FIG. 14, the hook 50 is engaged with the locking pin 55 to prevent the arm 30 from standing up, and the cassette holder 11 is moved to the lowered position (the arm 29,
30 is tilted). On the other hand, when the protrusion 56 of the hook 50 comes into contact with the release lever 105 of the base chassis 71, the hook 50 rotates counterclockwise against the urging force of the spring 51 and engages with the locking pin 55. Is canceled. Then, the arms 29 and 30 are erected by the urging force of the spring 37 and the cassette holder 11
Rises.

In FIGS. 11 and 12, 57,
Reference numeral 58 denotes each arm 19, 20 of the lifting mechanism 16, 17.
And 29, 30 in the tilted state, ie, the cassette holder 1
1 is a detection switch for detecting a falling state of the switch 1.

As shown in FIGS. 10 and 15, a tape protector 6 is provided in the cassette holder 11 of this embodiment.
1 is provided. When the cassette holder 11 (cassette case 2) is lowered, the lid 5 of the cassette case 2 is opened with this movement. At this time, the magnetic tape 1 may adhere to the back side of the lid 5 due to static electricity. However, the magnetic tape 1 rides on the rotating head drum and is carried to the opposite side, so that the magnetic tape 1 cannot be loaded properly. The tape protector 61 is a magnetic tape 1
Is prevented from riding on the rotating head drum.

That is, a rotating member 63 is attached to the cassette holder 11 by a pivot 62 at a rear portion on the side of the lifting mechanism 17, and two projecting pieces 64, 65 are provided on an outer peripheral portion of the rotating member 63. The rear end of the arm 29 of the elevating mechanism 17 can contact one of the protrusions 64. An L-shaped operating member 66 is rotatably supported adjacent to the rotating member 63 by a shaft 67, and one end of the operating member 66 extending downward is in contact with one protruding piece 65 of the rotating member 63. An elongated hole 68 is formed at the other end which can be contacted and extends horizontally. At the rear of the cassette holder 11, one end of the tape protector 61 is rotatably mounted by a pivot 69 at a position shifted from the center by a predetermined amount toward the lifting mechanism 17 (right side in FIG. 15). The connecting pin 70 is fixed at a position closer to the other end side from the pivot 69 of the connecting pin 61.
0 is engaged with the long hole 68 of the operating member 66.

Therefore, when the cassette holder 11 holding the cassette case 2 is in the raised position, the lid 5 of the cassette case 2 is closed as shown in FIGS. 15 and 16, while the tape protector 61 is at a predetermined position. The tape protector 61 faces downward at an angle θ, and is located at the outer periphery of the rotary head drum 112 mounted on the base chassis 71 and substantially at the center in the radial direction.

When the cassette holder 11 is lowered from this state, as shown in FIGS. 15 and 17, the lid 5 of the cassette case 2 is opened by a release mechanism (not shown), and the magnetic tape 1 is exposed. On the other hand, the arm 2 of the lifting mechanism 17
The rear ends of the arms 29 abut against the projecting pieces 64 of the rotating member 63 and gradually rotate them in the counterclockwise direction in FIG. Then, the rotating member 6
The third protruding piece 65 abuts on one end of the operating member 66 to operate (raise) the other end, and as the cassette holder 11 is lowered, the tape protector 61 is rotated upward. The lifting operation of the tape protector 61 is performed with a delay with respect to the opening operation of the lid 5 of the cassette case 2, and the tape protector 61 causes the magnetic tape 1 exposed from the cassette case 2 to move on the outer peripheral surface of the rotary head drum 112. The ascent ends immediately before facing.

Next, a drive mechanism, a loading mechanism, a magnetic tape running mechanism, and the like of the slide chassis will be described with reference to FIGS. In FIGS. 1 to 6, various members relating to the cassette holder mounted on the slide chassis are omitted.

As shown in FIGS. 1 and 4, the base chassis 71 has a rectangular plate shape and is fixed in an 8 mm video main body (not shown), and support pins 72, 73, 7 are provided in four directions.
4,75 are erected. On the other hand, slide chassis 1
5 are formed with slide holes 76, 77, 78, 79 along the front-rear direction (vertical direction in FIG. 4) on each side. Then, the support pins 72, 7 of the base chassis 71
Each slide hole 76, 77, 78, 79 of the slide chassis 15 is engaged with 3, 74, 75, so that the slide chassis 15 can move in the front-rear direction with respect to the base chassis 71. .

In this case, the support pins 73 of the base chassis 71 are the first reference axis, and the support pins 72 are the second reference axis. Therefore, at the unloading position shown in FIGS. 1 and 4, the support pins 72, which are the second reference shafts, in the slide holes 76, 77 with which the support pins 72, 73 engage.
Are positioned in contact with the end of the slide hole 76, and the support pin 73, which is the first reference axis, does not contact the end of the slide hole 77. On the other hand, at the loading position shown in FIGS. 2 and 5, the support pin 73 as the first reference axis contacts the end of the slide hole 77 to perform positioning, and the support pin 72 as the second reference axis slides. It does not contact the end of the hole 76. As described above, the slide chassis 71 has the slide holes 76,
77 is used to determine the direction of movement. Also,
The support pin 73 serving as the first reference axis and the support pin 72 serving as the second reference axis are fitted with almost no gap in the width direction of the slide holes 77 and 76, and the slide chassis 71 is also fitted with the support pins 72 and 72. Slide holes 76 and 7 that engage with 73
7, positioning in the width direction is performed.

A drive mechanism for the slide chassis 15 is mounted on the base chassis 71. That is, as shown in FIG. 4, a drive motor 81 having a drive gear 80 is mounted on the rear side of the base chassis 71, and the drive gear 80 is meshed with the adjacent first connection gear 82. The second connection gear 83 coaxially integrated with the first connection gear 82 meshes with the adjacent third connection gear 84, and the fourth connection gear 85 coaxially integrated with the third connection gear 84 is connected to the adjacent fifth connection gear 86. The fifth connection gear 86 is engaged with the sixth connection gear 87, and the sixth connection gear 87 is engaged with the cam gear 88. A first cam groove 89 is formed on the upper surface of the cam gear 88, while a second cam groove 90 is formed on the lower surface.

The base chassis 71 has a cam gear 8.
A drive arm 91 is disposed at a position adjacent to the drive arm 8, and its base end is rotatably attached by a pivot (support pin) 73, and a connection shaft 92 is fixedly connected to the distal end. on the other hand,
A support bracket 94 having a connection groove 93 is attached to the slide chassis 15, and the connection shaft 92 of the drive arm 91 is engaged with the connection groove 93. And
A cam shaft 95 is fixed to an intermediate portion of the drive arm 91, and the cam shaft 95 is connected to a first cam groove 89 of a cam gear 88.
Is engaged.

In this case, the pivot (73) of the drive arm 91 pivotally attached to the base chassis 71 is
5 is inserted into the slide hole 73 of the slide chassis 1.
Since the support pin 73 is used as the first reference axis for positioning in the movement direction of the fifth arm 5, the relative positional accuracy between the drive arm 91 and the slide chassis 15 is good.

Accordingly, when the driving motor 81 is driven, the driving force is transmitted to the driving gear 80 and the first connecting gear 8.
2, transmitted to the second connection gear 83, the third connection gear 84, the fourth connection gear 85, the fifth connection gear 86, the sixth connection gear 87, and the cam gear 88, and the cam gear 88 can be rotated. When the cam gear 88 rotates, the first
Drive arm 91 via cam shaft 93 by cam groove 89 of
Rotates about the pivot 73, and can move the slide chassis 15 along the base chassis 71 via the connection shaft 92 and the connection groove 95 (support bracket 94).

The base chassis 71 has a cam gear 8.
One end of a connection link 96 is rotatably mounted on a pivot 97 at a position adjacent to the drive arm 8 and opposite to the drive arm 91. The connecting link 96 has an L-shape, and a cam shaft 98 is fixedly connected to the other end.
Are engaged with the second cam groove 90 of the cam gear 88. One end of a connecting lever 99 is connected to an intermediate portion of the connecting link 96 by a connecting pin 100.
Is connected to an operating lever 102 by a connecting pin 101. The operating lever 102 has one end of the pivot 10
3 so as to be freely rotatable.
The operation of the pinch roller 159 (pinch arm 161) and the operation of the ratchet brake lever 184 are controlled.

The cam gear 88 has a lock control gear 1.
The lock control gear 104 is engaged with the release lever 105 by cam. Therefore, the release lever 105 can be operated between the release position and the non-release position by the rotation angle of the lock control gear 104, and the release lever 105 comes into contact or non-contact with the protrusion 56 of the hook 50 of the lock mechanism 48 in the cassette holder 11 described above. , Hook 5
0 disengagement can be controlled.

Here, the loading mechanism of the magnetic tape 1 will be described. As shown in FIGS. 1, 4, and 7, intermediate gears 107 and 108 sequentially mesh with the cam gear 88, and further, a first drive gear 109 and a second drive gear 110.
Are engaged. On the other hand, a rotary head drum 112 is mounted on the base chassis 71 at a substantially central portion via a drum base 111. A ring holder 113 is mounted on the base chassis 71 in close contact with the drum base 111, and two first ring gears 114 and a second ring gear 114 are mounted on the lower surface of the ring holder 113.
A ring gear 115 is rotatably supported in a vertically overlapping state.
09, the second ring gear 115 has the second drive gear 110
Are engaged with each other. Although not shown, the cam gear 88 and the intermediate gear 107 are partially missing gears.
The rotation of the cam gear 88, the transmission gear group on the drive source side, and the lock control gear 104 is allowed before and after the loading of the first and second ring gears 114 and 115 is completed.

Accordingly, when the driving motor 81 is driven, the driving force is transmitted to the driving gear 80 and the respective connecting gears 82, 82.
83, 84, 85, 86, 87, the cam gear 88, the first drive gear 109, and the second drive gear 110, and the first drive gear 109 and the second drive gear 110 rotate in different directions. Then, the first drive gear 109
The first ring gear 114 and the second ring gear 115 meshing with the second drive gear 110 can rotate in mutually different directions.

Drum base 111 and ring holder 11
3, loading guide grooves 116 and 117 are formed at respective lateral (left and right in FIG. 7) positions around the rotary head drum 112.
One of the loading guide grooves 116 has a bifurcated end, and the first guide base 118 has a pair of guide pins 11.
The first guide base 118 has guide rollers 121 and guide posts 122 and 123 movably mounted via the first and second guide bases 9 and 120. Then, the first guide base 118 is moved by the connecting lever 124 to the first guide base 118.
It is connected to a ring gear 114. A guide portion 125 is formed along the loading guide groove 116 on the drum base 111 and the ring holder 113, and a guide pin 126 guided by the guide portion 125 is fixed to the first guide base 118.

The other loading guide groove 117
The second guide base 127 has a pair of guide pins 12
The second guide base 127 is provided with a guide roller 130 and a guide post 131 standing upright. And the second
The guide base 127 is connected to the second ring gear 115 by a connecting lever 132. Note that an impedance roller 133 is mounted on the ring holder 113 adjacent to the loading guide groove 117.

Accordingly, when the first ring gear 114 and the second ring gear 115 rotate in opposite directions, the first ring gear 114 and the second ring gear 115 rotate.
The guide base 118 can move along the loading guide groove 116 by transmitting the driving force via the connecting lever 124. At this time, the guide pin 126
Is guided by the guide portion 125, so that the guide pins 119 and 120 are provided at one end of the loading guide groove 116.
Are distributed to each of the forked grooves. Also, the second
The guide base 127 can move along the loading guide groove 117 by transmitting the driving force via the connecting lever 132.

Next, the magnetic tape traveling mechanism will be described. As shown in FIG. 4, a capstan (shaft) 134 and a capstan gear 1 are provided on the rear side of the base chassis 71.
A capstan motor 136 having a capstan gear 35 is mounted, and the capstan gear 135 is engaged with an adjacent gear pulley 137. On the other hand, the slide chassis 15
A turntable 138 on the supply reel 3 side and a turntable 139 on the take-up reel 4 side are rotatably mounted at predetermined positions. Turntable 138 on supply reel 3 side and turntable 13 on take-up reel 4 side
9 has gear portions 140 and 141 formed on the outer peripheral portion, respectively. A gear pulley 142 is mounted on the base chassis 71 between the turntables 138 and 139, a belt 143 is wound around the gear pulley 137, and a rotating shaft 144 of the gear pulley 142 is mounted.
Penetrates the elongated hole 145 of the slide chassis 15.
Further, a bracket 146 is pivotally mounted on the rotating shaft 144 at an upper portion of the slide chassis 15, and an idle gear 147 meshing with the gear pulley 142 is mounted on the bracket 146. Note that a clutch member (not shown) that generates rotational friction is provided between the bracket 146 and the idle gear 147.

Accordingly, when the capstan motor 136 is driven, the capstan gear 135 is rotated, and the rotational force is transmitted by the gear pulley 137, the belt 143, and the gear pulley 14.
2, transmitted to the idle gear 147. At this time, if the transmitted torque is a clockwise rotation of the gear pulley 142, the idle gear 147 (bracket 146)
1 is moved rightward about the rotation shaft 144 in FIG. 1 to move the gear portion 14 of the turntable 139 on the take-up reel side.
1 and the turntable 139 can be rotated in the clockwise direction (the feed direction of the magnetic tape 1) via the idle gear 147. If the transmitted torque is a counterclockwise rotation of the gear pulley 142, the idle gear 147 (bracket 146) is moved leftward about the rotation shaft 144 in FIG. Gear section 140 of table 138
And the turntable 138 can be rotated in the counterclockwise direction (rewind direction of the magnetic tape 1) via the idle gear 147. The above-described clutch member generates a moving force of the idle gear 147.

As shown in FIG. 1, the slide chassis 15
A guide roller 148 and a guide post 149 for guiding the magnetic tape 1 during loading are movably provided on one side (the left part in FIG. 1). That is, an intermediate portion of the two links 150 and 151 is rotatably attached to the slide chassis 15 by being pivotally supported by the pivots 152 and 153. One end of each link 150 and 151 is provided with an engagement pin 154. , 155 pass through guide holes 156 and guide grooves 15 formed in base chassis 71.
7, 158, and a guide roller 148 and a guide post 149 are attached to the other end, respectively.

Accordingly, when the slide chassis 15 moves rearward (upward in FIG. 1), the engagement pins 154, 15
The movement of the link 5 is regulated by the guide grooves 157 and 158, and the links 150 and 151 rotate counterclockwise, respectively. When the links 150 and 151 rotate by a predetermined amount, the engagement pins 154 and 155 are moved to the respective guide grooves 157,
By moving along 158, each link 150, 15
The guide roller 148 and the guide post 149 provided at the other end of the first unit 1 can move to a predetermined position along a predetermined trajectory.

As shown in FIG. 1, the other side (the right side in FIG. 1) of the slide chassis 15 guides the magnetic tape 1 at the time of loading and at the same time moves between the capstan 134 and the running of the magnetic tape 1. A pinch roller 159 for guiding the magnetic tape 1 and a guide roller 160 are movably provided. That is, the slide chassis 1
A pinch arm 161 having a pinch roller 159 mounted on one end thereof is rotatably mounted on a pivot shaft 162, and a support arm 165 integrally mounted with first and second guide pins 163 and 164 is also provided with a pivot shaft 162. It is mounted rotatably. And each arm 1
A spring 166 is stretched between the pinch arms 161 and 165 to urge the pinch arm 161 in the clockwise direction in FIG. 1 and the support arm 165 in the counterclockwise direction in FIG. Is held at the position shown in FIG. 1 by a stopper (not shown).

The first and second guide pins 163 and 164 of the support arm 165 are connected to the slide chassis 1 respectively.
First and second guide grooves 16 formed in an arc formed on the first and second guide grooves 5
7, 168, a spring 169 is stretched between the support arm 165 and the slide chassis 15, and urges the support arm 165 counterclockwise in FIG.

On the other hand, a regulating portion 170 for regulating the movement of the second guide pin 164 is formed on the base chassis 71. As described above, the operating lever 102 is rotatably attached to the base chassis 71 by the pivot 103. The operating lever 102 has an engaging groove 171 with which the first guide groove 167 is engaged. Is formed.

A guide arm 172 is provided on the slide chassis 15 adjacent to the pinch arm 161.
The spring 17
4 is urged in the counterclockwise direction in FIG.

Therefore, when the slide chassis 15 moves rearward (upward in FIG. 1), the movement of the second guide pin 164 of the support arm 165 is restricted by the restricting portion 170, and the support arm 165 and the pinch arm 161 rotate clockwise. The first and second guide pins 163 and 164 move along the guide grooves 167 and 168, respectively. When the support arm 165 (pinch arm 161) rotates by a predetermined amount, the second guide pin 164
The support arm 165 (the pinch arm 161) moves together with the slide chassis 15 at the same rotation angle, and the first guide pin 163 moves the operation lever 102. Engagement groove 17
Fit into 1. At this time, as shown in FIG. 4, the actuation lever 102 is rotated counterclockwise in FIG. 4 by the second cam groove 90 of the cam gear 88 via the connection link 96 and the connection lever 99 to engage. The support arm 165 and the pinch arm 161 are rotated clockwise through the groove 171 and the first guide pin 163. In this manner, the pinch roller 159 can move to a position in contact with the capstan 134 via a predetermined trajectory.

When the pinch roller 159 moves, the guide arm 172 can also rotate clockwise.

Here, the take-up reel 4 side and the supply reel 3
Various brake mechanisms provided on the side will be described.
As shown in FIG. 1, a ratchet brake 181 is provided on the take-up reel 4 side to regulate the rotation of the take-up reel 4 in the pull-out direction (counterclockwise in FIG. 1) of the magnetic tape 1 during loading. . That is, a ratchet 182 is formed on the outer periphery of the turntable 139 on the take-up reel side, while a ratchet brake lever 184 having a locking claw 183 for locking the ratchet 182 is rotated on the slide chassis 15 by the pivot 185. It is movably mounted and is provided with rotational friction by a biasing member (not shown).

An engagement pin 187 is fixed to the ratchet brake lever 184 while the base chassis 7
1, an operation lever 188 is rotatably supported by a pivot (support pin) 75 at a position adjacent to the ratchet brake lever 184, and the operation lever 188 has an engagement piece 189 which can be engaged with the engagement pin 187. Are integrally formed. The operating lever 188 has an operating pin 19.
The operation groove 191 into which the operation pin 190 is inserted is formed in the operation lever 102 pivotally attached to the base chassis 71 while the base member 71 is fixed. Further, an engagement piece 192 which can be directly engaged with the engagement pin 187 of the ratchet brake lever 184 is formed integrally with the operation lever 102.

Therefore, when the magnetic tape 1 is loaded, the ratchet brake lever 184 causes the locking claw 183 to be moved by the previous loading and unloading operations so that the ratchet 182 of the turntable 139 on the take-up reel side.
The pull-out direction of the magnetic tape 1 during loading on the take-up reel 4 (see FIG. 1).
In the counterclockwise direction). At this time, when the operation lever 102 is rotated counterclockwise about the pivot 103, the operation lever 188 rotates clockwise in FIG. 1 via the operation groove 191 and the operation pin 190. Then, the engaging piece 189 becomes the engaging pin 1
1 and rotate the ratchet brake lever 184 counterclockwise in FIG.
Of the turntable 139 is released, and the take-up reel 4 is rotatable in the direction in which the magnetic tape 1 is pulled out.

After the loading is completed, when the operating lever 102 is rotated counterclockwise about the pivot 103, the engaging piece 192 is moved to the engaging pin 1 in the same manner as described above.
When the ratchet brake lever 184 is rotated by pressing 87, the restraint of the turntable 139 is released, and the take-up reel 4 becomes rotatable.

On the other hand, as shown in FIG. 1, on the supply reel 3 side, a soft brake 193 for restricting rotation of the magnetic tape supply reel 3 in the magnetic tape supply direction due to inertial force when the magnetic tape 1 is loaded, and loading is completed. A ratchet brake 194 is also provided, which similarly regulates rotation in the magnetic tape supply direction. That is, a band brake 195 is set around the outer periphery of the turntable 138 on the supply reel side.
One end of the slide chassis 15 is supported by the support member 196.
, While the other end is connected to a link 150. The soft brake lever 197 is rotatably attached to the slide chassis 15 by a pivot 198, and a pressure contact member 199 that presses against the outer peripheral portion of the turntable 138 is mounted at the tip of the soft brake lever 197.

On the other hand, the ratchet brake lever 200 is also rotatably attached to the slide chassis 15 by a pivot 198, and a locking claw 201 for locking to the gear portion 140 of the turntable 138 is integrally formed at the tip end thereof. ing. And the soft brake lever 19
7, a spring 202 is stretched between the ratchet brake lever 200 and the soft brake lever 197 in a clockwise direction in FIG. 1, that is, in a direction in which the pressing member 199 presses against the outer peripheral portion of the turntable 138. The ratchet brake lever 200 is turned in the counterclockwise direction, that is, the locking claw 201 is
It is urged in the direction of locking to zero.

The soft brake lever 197 and the ratchet brake lever 200 have the cam pins 2 respectively.
03 and 204 are fixed. On the other hand, the drive arm 91
A cam surface 205 is formed as a control unit for controlling the operation of the levers 197 and 200, and a cam groove 206 for controlling the operation of the lever 200 is formed in the cam gear 88. In this case, as described above, the drive arm 91 is shared with the support pin 73 as a first reference axis for positioning the movement direction by inserting the pivot shaft (73) into the slide hole 73 of the slide chassis 15. Therefore, the relative positional accuracy between the two is improved, and the operation timing of the soft brake lever 197 and the ratchet brake lever 200 can be made high in accuracy.

Accordingly, when the magnetic tape 1 is loaded, the soft brake lever 197 is urged clockwise by the urging force of the spring 202, so that the pressure contact member 199 presses against the turntable 138 on the supply reel side, and the magnetic tape The rotation of the supply reel 3 in the magnetic tape supply direction (clockwise in FIG. 1) due to the inertial force is prevented. Further, the ratchet brake lever 200 is held at that position by the cam surface 205 of the drive arm 91 abutting on the cam pin 204, and the locking claw 201 does not lock on the gear portion 140 of the turntable 138 on the supply reel side.
The rotation of the supply reel 4 during loading is not prevented.

In this state, when the slide chassis 15 is moved rearward (upward in FIG. 1) and loading is performed, the drive arm 91 rotates counterclockwise in FIG. The soft brake lever 197 through the spring 202
Is rotated in the counterclockwise direction against the urging force of. Then, the pressing of the pressing member 199 against the turntable 138 is released, and the rotation regulation of the supply reel 3 is released.
On the other hand, with this operation, the holding of the cam pin 204 by the cam surface 205 of the drive arm 91 is released, and the ratchet brake lever 184 is locked by the locking claw 201 to the gear portion 140 of the turntable 139 by the urging force of the spring 202. When the loading is completed, the supply reel 3 is prevented from rotating in the magnetic tape supply direction. After the loading is completed, when the cam gear 88 is further rotated, the ratchet brake lever 184 is rotated by the cam groove 204 via the cam pin 204, so that the locking pawl 201
Is released from the gear 140, and the supply reel 3
The rotation restriction of is released.

The operation of the above-described 8 mm video in which the cassette 2 is stored, the magnetic tape 1 is loaded, and the drive is performed will be described.

When the cassette case 2 is mounted in the 8 mm video main body, as shown in FIG. 9, the cassette case 2 is inserted into the cassette holder 11 at the raised position from the front. When the cassette holder 11 is pushed down from above in the eject (up) position shown in FIGS. 11 and 12, the arms 19, 20 and 29, 30 of the elevating mechanisms 16, 17 are tilted, and the cassette case 2 is stored. The cassette holder 11 moves to the lower position. At this time,
The cassette holder 11 (cassette case 2) can be lowered while keeping the horizontal state, and the left and right lifting mechanisms 16, 1
7, the movement of the arms 20, 30
The left and right elevating mechanisms 16 and 17 are linked to each other by a connecting rod 42 via pinions 40 and 41.
Operate synchronously, and the cassette holder 11
Is prevented from being twisted or skewed when descending.

As shown in FIGS. 13 and 15, when the cassette holder 11 is lowered,
1 is restrained by the lock mechanism 48 at the lowered position. That is, when the arms 29 and 30 of the elevating mechanism 17 are tilted, the locking pin 55 is lowered together, and the hook 50 is
Engage. Therefore, the arm 30 is prevented from standing up, and the cassette holder 11 is restrained at the lowered position. When the detection switch 57 or 58 detects the movement of the cassette holder 11 to the lowered position, the detection switch 57 or 58 gives the information to a microcomputer (not shown) for controlling a drive motor and the like, and the microcomputer supplies a motor drive circuit. , The drive motor 81 is driven, and the slide base 15 on which the cassette holder 11 is supported starts to move.

When the cassette holder 11 is at the raised position, the lid 5 of the cassette case 2 is closed as shown in FIGS. 15 and 16, and the tip end of the tape protector 61 is outside the rotary head drum 112. It is located on the periphery and almost at the center in the radial direction. Then, when the cassette holder 11 is lowered, as shown in FIGS. 15 and 17, the lid 5 of the cassette case 2 is opened and the magnetic tape 1 is opened.
Is exposed, and the tape protector 61 is rotated upward as the cassette holder 11 is lowered. At this time, the lifting operation of the tape protector 61 is performed with a delay from the opening operation of the lid 5 of the cassette case 2, and the magnetic tape 1 exposed from the cassette case 2 is moved from the cassette holder 11 facing the outer peripheral surface of the rotary head drum 112. In the lowered position, the tape protector 61 moves up to a horizontal position.

Therefore, when the cassette holder 11 (cassette case 2) is lowered, even if the magnetic tape 1 adheres to the back side of the lid 5 due to static electricity due to the opening of the lid 5 of the cassette case 2, 1 and rotating drum head 11
Since the tape protector 61 is located between the magnetic tape 1 and the magnetic tape 2, the magnetic tape 1 is prevented from riding on the rotary head drum 112.

When the cassette holder 11 is completely moved to the lowered position and restrained at the lowered position by the lock mechanism 48, the drive motor 81 is driven to drive the cassette holder 11
Slides the slide base 15 supported by. That is, as shown in FIGS. 1 and 4, when the driving motor 81 is driven, the driving force is applied to the driving gear 80 and the respective connecting gears 8.
2, 83, 84, 85, 86, 87 via the cam gear 8
8 and the cam gear 88 rotates. Then
The drive arm 91 is rotated counterclockwise in FIG. 2 by the first cam groove 89 of the cam gear 88 via the cam shaft 95, and the cassette holder 11 is moved together with the slide chassis 15 as shown in FIGS. Base chassis 71
(Upward in the figure), and the support pin 73, which is the first reference axis, comes into contact with the end of the slide hole 77 to stop positioning at a predetermined loading position.

The magnetic tape 1 is loaded while the slide chassis 15 is slid by the drive motor 81. That is, the eject (lower) position of the slide chassis 15 shown in FIGS. 1 and 4 is an unloading state of the magnetic tape 1. From this state, the slide chassis 15 is slid and the magnetic tape 1 is pulled out for loading. The loading state of the magnetic tape 1 shown in FIGS.

As shown in FIGS. 2 and 5, the drive motor 8
As described above, the cam gear 88 rotates, and the driving force is transmitted to the first drive gear 109 and the second drive gear 110, and the first ring gear 114 and the second ring gear 115 move in different directions. That is, the first ring gear 114 rotates in the counterclockwise direction in the figure, and the second ring gear 115 rotates in the clockwise direction. Then, as shown in FIG. 7, the first guide base 118 moves along the loading guide groove 116, while the second guide base 127 moves along the loading guide groove 117.

At this time, the first guide base 118 slightly rotates at the end of the loading guide groove 116. That is, as shown in FIG.
Is the guide pin 119, 120 is the loading guide groove 1
The guide pin 126 moves while being guided by the guide 16. When the first guide base 118 moves to the terminal end of the loading guide groove 116, the guide pins 126 are restrained by the guide portion 125, and thus the guide pins 119 and 12 are moved.
0 is distributed to each of the forked portions of the loading guide groove 116 and moves.

Accordingly, the magnetic tape 1 in the cassette case 2 is provided with the guide rollers 121 and the guide posts 122 and 123 of the first guide base 118 and the second guide base 127.
And is brought into sliding contact with the outer peripheral surface of the rotary head drum 112 by the guide roller 130 and the guide post 131.

The magnetic tape 1 is loaded by a plurality of guide rollers or guide posts on both sides of the rotary head drum 112, while being loaded by the movement of the first and second guide bases 118 and 127. As shown in FIGS. 1 and 2, one side of the slide chassis 15
Moves backward, the pin 1 of each link 150, 151
The links 54 and 155 move by the guide grooves 157 and 158, and the links 150 and 151 rotate.
Then, the guide roller 148 of each link 150, 151
Then, the guide post 149 moves to pull out the magnetic tape 1.

Further, when the slide chassis 15 moves rearward on the other side of the slide chassis 15, the movement of the second guide pin 164 of the support arm 165 is restricted by the restricting portion 170, and the support arm 165 and the pinch arm 161 rotate. Move. Then, when the support arm 165 rotates by a predetermined amount, the second guide pin 164 is disengaged from the regulating portion 170, and the first and second guide pins 163, 164 move along the guide grooves 167, 168, and the first guide pin 164 is moved. 163
Fits into the engagement groove 171 of the operation lever 102. Thus, the pinch roller 159 moves to pull out the magnetic tape 1. When the pinch roller 159 moves, the guide arm 172 rotates and the guide roller 160 moves.
Guides the magnetic tape 1.

When the magnetic tape 1 is loaded, various kinds of brakes 181 and 181 are provided on the supply reel 3 and the take-up reel 4 of the cassette case 2 around which the magnetic tape 1 is wound.
193 and 194 are operating.

At the time of loading the magnetic tape 1, as shown in FIG. 1, the ratchet brake lever 184 on the take-up reel 4 causes the locking claw 183 to be moved by the previous loading and unloading operations to turn the turntable 139 on the take-up reel. Of the magnetic tape 1 during loading on the take-up reel 4 in the pull-out direction (counterclockwise in FIG. 1). Therefore, the magnetic tape 1 is not pulled out from the take-up reel 4 during loading, and is prevented from being recorded again on the recorded magnetic tape 1 wound on the take-up reel 4.

When the magnetic tape 1 in the cassette case 2 inserted into the cassette holder 11 is entirely wound on the take-up reel 4 and there is no magnetic tape 1 wound on the supply reel 3, loading is performed. Can not
The magnetic tape 1 is cut. In this case, this is detected by a detector (not shown), and the operation lever 188 is rotated in the counterclockwise direction about the pivot 103 from the state shown in FIG. Then, the engagement piece 189 becomes the engagement pin 187.
Is pressed to rotate the ratchet brake lever 184 in the counterclockwise direction, so that the locking to the ratchet 182 by the locking claw 183 is released, and the restraint of the turntable 139 is released. It becomes rotatable in the pull-out direction.

When loading the magnetic tape 1,
As shown in FIG. 1, the soft brake lever 197 rotates in the magnetic tape supply direction by the inertia force of the supply reel 3 when the pressing member 199 presses against the turntable 138 on the supply reel side by the urging force of the spring 202. Block. Then, when the loading is completed, as shown in FIG. 2, the cam surface 205 of the drive arm 91 rotates the soft brake lever 197 via the cam pin 203, and the pressure contact of the pressure contact member 199 to the turntable 138 is released. The rotation restriction of the supply reel 3 is released.

On the other hand, when loading the magnetic tape 1,
As shown in FIG. 1, the ratchet brake lever 200 is held at that position by the cam surface 205 of the drive arm 91 abutting on the cam pin 204, and the locking claw 201 does not lock on the gear portion 140 of the turntable 138, The rotation of the supply reel 3 is not prevented. Then, when the loading is completed, as shown in FIG.
05, the holding of the cam pin 204 is released, and the ratchet brake lever 200 locks the locking claw 201 with the gear portion 140 of the turntable 138 by the spring 202, thereby preventing the supply reel 3 from rotating in the magnetic tape supply direction. Is done.

As described above, the magnetic tape 1 includes the guide rollers 121, 130, 148, and 160, the guide posts 122, 123, 131, and 149, and the pinch roller 159.
As a result, it is pulled out from the cassette case 2 and loaded on a predetermined locus. The loading state of the magnetic tape 1 shown in FIGS. 2 and 5 is a stop state in 8 mm video.

When the operator presses the play button from this state, the drive motor 81 is driven again, and the cam gear 88 rotates and the connection link 96 and the second cam groove 90 rotate as shown in FIGS. The operation lever 102 is rotated counterclockwise in FIG. 5 via the connection lever 99.
Then, the support arm 165 and the pinch arm 161 are rotated clockwise through the engagement groove 171 of the operation lever 102 and the first guide pin 163. Accordingly, the pinch roller 159 comes into contact with the capstan 134 and moves to a position sandwiching the magnetic tape 1 together with the capstan 134, and the drive motor 81 stops.

As described above, the operating lever 102
Is rotated, the engagement piece 192 pushes the engagement pin 187 to rotate the ratchet brake lever 184, whereby the restraint of the turntable 139 is released and the take-up reel 4 becomes rotatable. Further, when the cam gear 88 rotates, the ratchet brake lever 184 is rotated by the cam groove 206 via the cam pin 204, so that the locking pawl 201
Is released from the gear 140, and the supply reel 3
The rotation restriction of is released.

As described above, the supply reel 3 and the take-up reel 4
When the rotation restriction is released, the take-up reel 4 can be driven and rotated to run the magnetic tape. That is, as shown in FIG. 3, when the capstan motor 136 is driven, the capstan gear 135 rotates, and the rotational force is transmitted to the gear pulley 142 via the gear pulley 137 and the belt 143. Rotate clockwise. Then, the idle gear 147 rotates counterclockwise in FIG.
46 rotates to the right around the rotation shaft 144, and the idle gear 147 rotates to the turntable 139 on the take-up reel side.
Gear section 141. Therefore, the idle gear 14
7 is transmitted to the turntable 139, and the turntable 139 rotates clockwise. Then, the take-up reel 4 rotates in the same direction to rotate the magnetic tape 1.
Travels in the feed direction. Then, recording or reproduction can be performed as the magnetic tape 1 runs.

As shown in FIG. 3, the running locus of the magnetic tape 1 is such that the magnetic tape 1 pulled out of the cassette case 2 is guided by the guide rollers 148 and the guide posts 14.
9, impedance roller 133, guide roller 13
0, rotating head drum 11 via guide post 131
2 are slidably contacted with the outer peripheral surface of the guide post 122, 123,
After passing through the guide roller 121, the capstan 134 (pinch roller 159), and the guide roller 160, it enters the cassette case 2 again.

When the recording or reproduction of the magnetic tape 1 is completed and the operator presses the stop button while the magnetic tape 1 is running, the capstan motor 136 stops, the rotation of the take-up reel 4 stops, and the drive is stopped. The motor 81 rotates in the opposite direction to that described above, and the pinch rollers 159
4 and the state shown in FIGS. 2 and 5 is obtained. Also,
The ratchet brake 181 restrains the take-up reel 4 to prevent rotation, and the ratchet brake 194 controls the supply reel 4.
To prevent rotation.

When the operator presses the eject button when the magnetic tape 1 is stopped, the drive motor 81 rotates in the reverse direction, the loading of the magnetic tape 1 is released, the magnetic tape 1 is returned into the cassette case 2, and the slide chassis 15 is moved forward. 2 and 5 (downward in FIGS. 2 and 5), and becomes the unloading state shown in FIGS.

When the slide chassis 15 moves to the eject position (unloading state) shown in FIGS. 1 and 4, as shown in FIGS.
The protruding portion 56 of the hook 50 abuts on the release lever 105, and the hook 50 rotates counterclockwise against the urging force of the spring 51, whereby the engagement with the locking pin 55 is released. You. Then, the arms 29, 3 of the lifting mechanism 17
0 is raised by the urging force of the spring 37, and the arms 19 and 20 of the elevating mechanism 16 are also raised by the urging force of the spring 27, and the cassette holder 11 is raised.

When the cassette holder 11 is raised by the lifting mechanisms 16 and 17, the cassette holder 11 is raised by the urging force of the springs 27 and 37, but when the arm 29 is raised, the rear end moves forward together with the slide member 45. By rotating the pinion 46 via the rack 44, the rotation of the pinion 46 becomes gentle by the action of the oil damper 47, and the cassette holder 1 is rotated.
Shock and vibration at the time of lifting / lowering of 1 are reduced to operate gently.

After the cassette holder 11 is lifted, the cassette case 2 can be taken out of the cassette holder 11.

[0092]

As described above, according to the slide mechanism of the magnetic recording / reproducing apparatus of the present invention, in the magnetic recording / reproducing apparatus, the pivot at the base end of the drive arm is attached to the base chassis. The shared use of the support shaft for movably supporting the erected slide chassis enables the relative position accuracy between the drive arm and the slide chassis to be maintained with high accuracy, and the positioning of the slide chassis at each movement stop position is accurate. And the size and weight of the device and the cost can be reduced. Also, since the pivot of the ratchet brake release lever that regulates the rotation of the take-up reel in the tape unwinding direction together with the pivot of the drive arm is shared with another support shaft of the base chassis, further reduction in size and weight of the device and cost reduction are achieved. Reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a plan view of a slide chassis showing an ejected (cassette detachable) state in an 8 mm video provided with a slide mechanism of a magnetic recording and reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of a slide chassis showing a loading state.

FIG. 3 is a plan view of a slide chassis showing a tape running state.

FIG. 4 is a plan view of a base chassis showing an ejected (cassette detachable) state in the 8 mm video.

FIG. 5 is a plan view of a base chassis showing a loading state.

FIG. 6 is a plan view of a base chassis showing a tape running state.

FIG. 7 is a plan view illustrating a loading mechanism.

FIG. 8 is a schematic diagram illustrating a loading operation state.

FIG. 9 is a perspective view of a cassette holder.

FIG. 10 is a plan view of the cassette holder.

FIG. 11 is a right side view of the cassette holder.

FIG. 12 is a left side view of the cassette holder.

FIG. 13 is a right side view of the cassette holder showing a cassette storage state.

FIG. 14 is a left side view of the cassette holder showing a cassette storage state.

FIG. 15 is a front view of the cassette holder.

FIG. 16 is an operation explanatory view showing a positional relationship between a cassette case and a rotary head drum.

FIG. 17 is an operation explanatory view showing a positional relationship between a cassette case and a rotary head drum.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic tape 2 Cassette case 3 Supply reel 4 Take-up reel 11 Cassette holder 15 Slide chassis 16, 17 Elevating mechanism 48 Lock mechanism 71 Base chassis 72 Support pin (2nd reference axis) 73 Support pin (1st reference axis) 74, 75 support pin 76, 77, 78, 79 slide hole 81 drive motor 88 cam gear 89, 90 cam groove 91 drive arm 112 rotating head drum

Claims (1)

(57) [Claims] 1. A support shaft is erected on both sides of a base chassis mounted in an apparatus, and an elongated hole is formed in a slide chassis supporting a cassette in a moving direction so that the support shaft has the length. The slide chassis is slidably supported by the base chassis by being inserted into the hole, and the base chassis and the slide chassis are connected by a drive arm, and the drive arm is rotated by a drive rotatable cam gear. Thereby, the slide chassis can be moved between the cassette attaching / detaching position and the recording / reproducing position, and is locked at a predetermined time on the rotating body on the magnetic tape take-up reel side in the tape unwinding direction of the take-up reel. In a magnetic recording / reproducing apparatus provided with a ratchet brake for regulating rotation and a release lever for the ratchet brake, the base end of the drive arm is A slide mechanism for a magnetic recording / reproducing apparatus, wherein the slide lever is rotatably supported by one of the support shafts erected on a chassis and the base end of the release lever is rotatably supported by the other support shaft. .