JPH06150474A - Tape loading mechanism - Google Patents

Abstract

PURPOSE:To provide a loading mechanism traveling a magnetic tape stably and to facilite the manufacture of the mechanism. CONSTITUTION:A first guiding base 118 in which a guiding roll 121 and a guiding post 123 are vertically erected and a second guiding base 127 in which guiding rolls 130 and 131 are erected are arranged so as to press a magnetic tape 1 against the lead 112a of a rotary head drum 112 at a prescribed angle at the input side and the output side of the rotary head drum 112.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading mechanism for pulling out a magnetic tape from a cassette case and winding it around a rotary head drum in a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art Among magnetic recording / reproducing devices that use a magnetic tape, there is a so-called 8 mm video. This 8
In millivideo, the slide chassis can store and hold a cassette case wound with magnetic tape.
And the slide chassis can be moved to the play position by the slide mechanism in the video main body while being able to move to the eject position where the slide chassis is projected outward from the video main body to insert and remove the cassette case. At this play position, the magnetic tape in the cassette case can be pulled out and run to perform recording or reproduction.

Therefore, a tape loading mechanism for pulling out the magnetic tape from the cassette case and winding the magnetic tape around the rotary head drum is installed in the 8 mm video apparatus. This tape loading mechanism operates as the slide chassis moves to the play position to perform tape loading. At least a pair of guide posts are movably provided on both sides of the rotary head drum, and the guide posts are loaded at the time of loading. The magnetic tape in the cassette case is pulled out and wound around the rotary head drum at a predetermined angle.

An example of such a tape loading mechanism is shown in FIG. The tape loading mechanism shown in the figure is constructed such that the magnetic tape 02 is obliquely wound around a tilted rotary head drum 01 at a predetermined angle (Japanese Utility Model Laid-Open No. 63-91842). That is, a plurality of guide posts 06, 07, 08, 010 and guide rollers 09 are provided between the supply reel 03 and the rotary head drum 01.
On the other hand, a plurality of guide posts 011, 013, 0 are provided between the rotary head drum 01 and the take-up reel 04.
14, 015 and a guide roller 012 are arranged.

Of these, the guide roller 09 and the guide post 010 are placed on the guide base 016 on the entrance side of the rotary head drum 01 and are movable along a guide member (not shown). Among them, the guide post 011 and the guide roller 012 are respectively mounted on the guide base 017 on the exit side of the rotary head drum 01 and movable along a guide member (not shown). Therefore, the guide post 010 and the guide roller 09, and the guide post 011 and the guide roller 012 are the supply reel 0 at the time of loading.
3 from the position near the take-up reel 04 to the position near the rotary head drum 01 as shown in the figure.
I will move while guiding.

Here, the guide roller 09 and the guide post 010 at the entrance side position of the rotary head drum 01 are
Since the magnetic tape 02 is obliquely wound around the rotary head drum 01, the magnetic tape 02 is moved to a position higher than the guide roller 011 and the guide post 012 located immediately thereafter. The rotary head drum 01 is disposed so as to be inclined with respect to a cassette case (not shown), and the guide posts 010 and 011 immediately before and after the rotary head drum 01 rotate in order to stabilize the running of the magnetic tape 02. It is arranged parallel to the head drum 04.

Therefore, the magnetic tape 02 fed from the supply reel 03 is provided with these guide posts 06, 07,
It is bent to the left and right by 08 and 010 and the guide roller 09, and is swung up and down to be obliquely wound around the rotary head drum 04. Then, the magnetic tape 02 sent from the rotary head drum 04 is guided by the guide post 01.
1, 013, 014, 015 and the guide roller 012 fold it to the left and right, swing it up and down, and wind it on the take-up reel 05.

[0008]

In the above-described tape loading mechanism, the magnetic tape 02 wound around the rotary head drum 01 moves up and down, and when it becomes unstable, the image quality deteriorates. Therefore, stabilization of the magnetic tape 02 is required. Has been done. Therefore, as shown in FIG. 25, when the magnetic tape 02 is wound around the rotary head drum 01, the magnetic tape 02 is not guided in parallel to the slanted lead 05 provided on the magnetic head drum 01, but is slightly moved. There is known a structure in which the magnetic tape 02 is provided with an elevation angle when the rotary head drum 01 enters and exits (Japanese Patent Publication 6).
1-55180).

With this structure, since the magnetic tape 02 is pressed against the lead 05, a minute vertical movement of the magnetic tape 02 is suppressed, and the magnetic tape 02 stably contacts the magnetic head drum 01. , There is an advantage that the image quality is improved. However, in order to guide the magnetic tape 02 in this way, there is a manufacturing problem because it is necessary to finely adjust the angles of the guide posts 010 and 011 in front of and behind the rotary head drum 01.

That is, in order to wind the magnetic tape 02 obliquely around the rotary head drum 01, the guide post 01
If the design value is an angle at which 0,011 should be theoretically tilted, the guide bases 016,017 will be slightly tilted further from this design value.
Must be attached to. Further, since the guide posts 010 and 011 are inclined at a predetermined angle, the guide rollers 09 and 012 are vertical, so that the magnetic tape 02 may be twisted or curled.

The present invention has been made in view of the above-mentioned prior art, and in the configuration in which the magnetic tape is provided with an elevation angle when the rotary head drum enters and exits, the angles of the guide posts and the guide rollers immediately before and after the rotary head drum. An object is to provide a tape loading mechanism that can be easily adjusted.

[0012]

The structure of the present invention which achieves such an object is a plurality of guide posts between a supply reel and a take-up reel accommodated in a cassette and a rotary head drum inclined toward the cassette. And a guide roller, and at the time of loading, the guide post and the guide roller of the guide post and the guide roller, which are arranged on the guide base, are moved to the inlet side and the outlet side of the rotary head drum, respectively. In a tape loading mechanism for pulling out the magnetic tape from inside and winding it obliquely around the rotary head drum, the guide post and the guide roller are vertically erected on the guide base, while the guide base is the magnetic tape. Is pressed against the lead of the rotary head drum, Characterized in that it is arranged in a certain angle inclined with respect to the entry side and the delivery side to the lead of the rolling head drum.

[0013]

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

FIG. 1 is a plan view of a slide chassis showing an eject state in 8 mm video equipped with a tape loading mechanism according to an embodiment of the present invention, FIG. 2 is a plan view of a slide chassis showing a loading state, and FIG. FIG. 4 is a plan view of the slide chassis showing the tape running state.
FIG. 5 is a plan view of the base chassis showing the eject state in 8 mm video, FIG. 5 is a plan view of the base chassis showing the loading state, FIG. 6 is a plan view of the base chassis showing the tape running state, and FIG. 7 is a tape loading mechanism. 8 is a plan view, FIG. 8 is a schematic view showing a loading operation state, FIG. 9 is a perspective view of the cassette holder, FIG. 10 is a plan view of the cassette holder, FIG. 11 is a right side view of the cassette holder, and FIG. 12 is a left side view of the cassette holder. 13 and 14
FIG. 15 is a left and right side view of the cassette holder showing the cassette storage state, FIG. 15 is a front view of the cassette holder, and FIGS. 16 and 17 are operation explanations showing the positional relationship between the cassette case and the rotary head drum.

In the present embodiment, an 8-mm video will be described as a magnetic recording / reproducing apparatus having a tape loading mechanism. The cassette holder of the 8 mm video can be projected outward from the video main body by the elevating mechanism, and is supported by the slide chassis so that it can slide to the play position with respect to the base chassis of the video main body. . In this embodiment, the front side or the front side means the side where the cassette case is inserted into the cassette holder, and the rear side or the rear side means the opposite side.

First, the cassette holder and its elevating mechanism will be described with reference to FIGS. 9 to 17, various members related to driving 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 so that the magnetic tape 1 can be loaded. 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 in FIG. 11) opening and the rear (FIG. 11). A stopper 12 for regulating the position of the inserted cassette case 2 is formed on the right side of FIG. Support portions 13 and 14 that support the cassette case 2 are formed on the lower portions of both sides of the cassette holder 11. On the other hand, the slide chassis 15 has a box shape with an open top, and the cassette holder 11 is provided on the left and right sides of the lifting mechanism 1.
It is supported by 6 and 17 so that it can be raised and lowered.

As shown in detail in FIG. 11, one lifting mechanism 16 comprises a pair of arms 19 and 20 having an intermediate portion connected in an X shape by a connecting shaft 18, and each arm 19 and 2 is connected.
The front end portion of 0 is the cassette holder 1 by the pivot shafts 21 and 22.
1 and the slide chassis 15, and the rear ends thereof are connected to the slide chassis 15 and the cassette holder 11 by the long holes 23 and 24 and the support shafts 25 and 26. A spring 27 is provided between the pair of arms 19 and 20.
Is stretched and urges the arms 19 and 20 in a standing direction.

As shown in detail in FIG. 12, the other elevating mechanism 17 comprises a pair of arms 29 and 30 having an intermediate portion connected in an X shape by a connecting shaft 28.
The front end of 0 is the cassette holder 1 by the pivots 31 and 32.
1 and the slide chassis 15, and the rear ends thereof are connected to the slide chassis 15 and the cassette holder 11 by the long holes 33 and 34 and the support shafts 35 and 36. A spring 37 is provided between the pair of arms 29 and 30.
Is stretched and urges the arms 29 and 30 in a standing direction.

Therefore, as shown in FIGS. 11 to 14, the cassette holder 11 has arms 19 and 2 of the elevating mechanism 16.
By raising and lowering the 0 and the arms 29 and 30 of the elevating mechanism 17, it is possible to ascend and descend while maintaining a substantially horizontal state.

The left and right elevating mechanisms 16, 17 are operated on the cassette holder 11 at substantially the same speed, that is, the elevating mechanisms 16, 17 are
A synchronization mechanism for synchronizing 17 is provided. As shown in FIGS. 9, 11 and 12, racks 38 and 39 are formed along the upper side of the rear ends of the arms 20 and 30 of the lifting mechanisms 16 and 17, respectively. Pinions 40 and 41 that mesh with the racks 38 and 39 are rotatably attached to the side portions 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 horizontally 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 moved through the racks 38 and 39.
Are rotated respectively, but this pinion 40, 41
Are connected by a connecting rod 42, so that 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 slanted when it is moved up and down. Never.
Then, in the lifting mechanisms 16 and 17, the arms 20 and 3
The rear end side of 0, that is, the side on which the racks 38 and 39 are formed is connected to the cassette holder 11 by the long holes 24 and 34 and the support shafts 26 and 36.
39 is a pinion 40 while sliding along with rotation.
41 is rotated at an increased speed, and the lifting mechanism 16, 17
The left and right of will be synchronized.

As described above, the left and right lifting mechanism 1
6, 17, each arm 19, 20 and arm 2
Springs 27 and 37 are stretched on 9 and 30,
The rise of the cassette holder 11 is caused by the springs 27, 3
The biasing force of 7 causes impact force and vibration of the cassette holder 11 due to the biasing force. Therefore, the cassette holder 11 is attached to the lifting mechanisms 16 and 17.
A damper mechanism 43 is provided for reducing shocks and vibrations during ascent and descent to operate gently.

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

Therefore, when the cassette holder 11 is raised by the elevating mechanism 17, the arms 29 and 30 are rotated in the standing direction by the urging force of the spring 37. At this time,
The rear end portion 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. However, the action of the oil damper 47 slows the rotation of the pinion 46, and the cassette holder 11 It is possible to reduce shocks and vibrations when moving up and down and to operate gently.

Further, each of the arms 2 is attached to one lifting mechanism 17.
A lock mechanism 48 for holding the cassette holders 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 counterclockwise by a spring 51 stretched between the hook 50 and the slide chassis 15. Biased in the direction. Also, the shaft 52 is adjacent to the hook 50.
The restriction plate 53 is rotatably attached by the spring 54 and is urged in the counterclockwise direction by the spring 54, and the tip end thereof abuts the hook 50, so that the hook 50 is rotated against the urging force of the spring 51. It is moved and held at the release position (the position shown in FIG. 12). On the other hand, the arm 30 is integrally formed with a downward extending portion, and the locking pin 55 is fixed to the extending portion. Also, the hook 50
A projecting portion 56 is integrally formed on the lower part of the base chassis 71, and a release lever 105 is formed on a base chassis 71 (described later) that 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 in the standing position), the arms 29 and 30 are tilted and the locking pin 55 is lowered. Then, the locking pin 55 is attached to the regulation plate 5.
When the hook 50 is pressed against the urging force of the spring 54 against the urging force of the spring 54, the hook 50 held in the release position by the regulating 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 (arm 29,
30 is restrained in the tilted position). On the other hand, when the protruding portion 56 of the hook 50 contacts the release lever 105 of the base chassis 71, the hook 50 rotates counterclockwise against the biasing force of the spring 51 and engages with the locking pin 55. Is canceled. Then, the arms 29 and 30 stand up by the urging force of the spring 37, and the cassette holder 11
Rises.

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

Further, as shown in FIGS. 10 and 15, the tape protector 6 is attached to the cassette holder 11 of this embodiment.
1 is provided. When the cassette holder 11 (cassette case 2) descends, the lid 5 of the cassette case 2 opens along with this movement, but at this time, the magnetic tape 1 may adhere to the back side of the lid 5 due to static electricity. The magnetic tape 1 rides on the rotary head drum and is taken to the opposite side, so that it cannot be properly loaded. The tape protector 61 is the magnetic tape 1.
It is intended to prevent the vehicle from riding on the rotary head drum.

That is, a rotary member 63 is attached to the cassette holder 11 by a pivot 62 on the rear side of the lifting mechanism 17 side, and two projecting pieces 64, 65 are provided on the outer periphery of the rotary member 63. The rear end portion of the arm 29 of the elevating mechanism 17 can come into contact with the one projecting piece 64. An L-shaped actuating member 66 is rotatably supported by a shaft 67 adjacent to the turning member 63, and one end of the actuating member 66 extending downward contacts one projection 65 of the turning member 63. A long hole 68 is formed at the other end that can be contacted and extends horizontally. Further, at the rear of the cassette holder 11, one end of a tape protector 61 is rotatably attached by a pivot shaft 69 at a position displaced from the center thereof by a predetermined amount toward the elevating mechanism 17 side (right side in FIG. 15). A connecting pin 70 is fixed at a position closer to the other end side of the pivot 69 of 61.
0 is engaged with the long hole 68 of the actuating member 66.

Therefore, when the cassette holder 11 holding the cassette case 2 is in the raised position, as shown in FIGS. 15 and 16, the lid 5 of the cassette case 2 is closed, while the tape protector 61 is in a predetermined position. The tape protector 61 faces downward at an angle θ, and the tip end portion of the tape protector 61 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 the release mechanism (not shown), and the magnetic tape 1 is exposed. On the other hand, the arm 2 of the lifting mechanism 17
9 and 30 are tilted, and the rear end of the arm 29 contacts the projecting piece 64 of the rotating member 63 and gradually rotates it in the counterclockwise direction in FIG. Then, the rotating member 6
The protruding piece 65 of No. 3 abuts on one end of the operating member 66 to operate (raise) the other end, and the tape protector 61 is rotated upward as the cassette holder 11 descends. The ascending operation of the tape protector 61 is performed later than the opening operation of the lid 5 of the cassette case 2, and the tape protector 61 has the magnetic tape 1 exposed from the cassette case 2 on the outer peripheral surface of the rotary head drum 112. The climb ends just before facing.

Next, the drive mechanism of the slide chassis, the tape loading mechanism, the magnetic tape running mechanism, etc. will be described with reference to FIGS. 1 to 6, various members related 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 unillustrated 8 mm video main body, and support pins 72, 73, 7 are provided in four directions.
4,75 are erected. On the other hand, slide chassis 1
5, slide holes 76, 77, 78, 79 are formed on each side along the front-rear direction (vertical direction in FIG. 4). Then, the support pins 72, 7 of the base chassis 71
By engaging the slide holes 76, 77, 78, 79 of the slide chassis 15 with the holes 3, 74, 75, the slide chassis 15 can be moved in the front-rear direction with respect to the base chassis 71. .

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 meshes with the adjacent first connecting 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 adjacent the fifth connection gear 86. The fifth connecting gear 86 meshes with the sixth connecting gear 87, and the sixth connecting gear 87 meshes 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 cam gear 8 is attached to the base chassis 71.
A base end portion of the drive arm 91 is rotatably attached to a position adjacent to 8 by a pivot shaft (support pin) 73, and a connecting shaft 92 is fixedly coupled to the tip end portion. On the other hand, a support bracket 94 having a connecting groove 93 formed on the slide chassis 15
Is attached to the connecting groove 93.
The connecting shaft 92 of is engaged. Then, the drive arm 91
A cam shaft 95 is fixed to an intermediate portion of the cam shaft 95, and the cam shaft 95 is engaged with the first cam groove 89 of the cam gear 88.

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

The cam gear 8 is attached to the base chassis 71.
8, one end of a connecting link 96 is rotatably attached by a pivot 97 at a position 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 of the connecting link 96.
Engages with the second cam groove 90 of the cam gear 88. One end of the connecting lever 99 is connected to the intermediate portion of the connecting link 96 by the connecting pin 100, and the connecting lever 99
The other end of is connected to the operating lever 102 by a connecting pin 101. This actuating lever 102 has a pivot 10 at one end.
It is rotatably attached by 3 and will be described later.
The operation controls the pinch roller 159 (pinch arm 161) and the ratchet brake lever 184.

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

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

Therefore, when the drive motor 81 is driven, its driving force is changed to the drive gear 80 and the connecting gears 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, this first drive gear 109
The first ring gear 114 and the second ring gear 115, which mesh 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 positions (left and right in FIG. 7) around the rotary head drum 112.
One loading groove 116 is formed horizontally, while the other loading groove 217 is inclined upward from the horizontal. The term “horizontal” as used herein means horizontal with respect to the cassette case 2. Conventionally, since the magnetic tape 1 is wound obliquely around the rotary head drum 112, it is necessary to incline one loading groove 116 from the horizontal direction downward. However, in the present embodiment, the guide base 118 is provided on the guide base 118 as described later. Two guide posts 1
Since the Nos. 22 and 123 are provided, it is not necessary to provide such an inclination, and the manufacturing becomes easy.

One loading guide groove 116 is bifurcated at one end, and a first guide base 118 is movably mounted on the first guide base 118 via a pair of guide pins 119 and 120. Guide roller 1
21 and the guide post 123 are erected vertically, and the guide post 122 is erected vertically. Further, the drum base 111 and the ring holder 113 are formed with a guide portion 125 along the loading guide groove 116.
A guide pin 126 guided by the guide portion 125 is fixed to the guide base 118. In addition, the first guide base 118 is provided near the end of the loading groove 116.
A positioning pin 209 that abuts against and regulates its position is provided upright. At the position where the first guide base 118 contacts the positioning pin 209, the guide post 123 and the guide roller 121 erected on the first guide base 118 are not parallel to the rotary head drum 112, but slightly. The magnetic tape 1 is pressed against a lead (not shown) provided on the rotary head drum 112 while inclining in the rising direction.

On the other hand, as shown in FIGS. 20 and 22, the first
The guide base 118 is connected to the first ring gear 114 by a connecting lever 124. That is, the first ring gear 114 is provided with two elongated holes 114a and 114b, and the first slide plate 207 is mounted in the elongated holes 114a and 114b via a pin so as to be slidable in the radial direction. The first slide plate 207 and the first guide base 118 are connected by a connecting lever 124. Further, the first slide plate 207 and the first ring gear 114 have springs 2 for obtaining a biasing force in the radial direction.
08 is installed. Therefore, when the first guide base 118 contacts the positioning pin 209 at the end position of the loading guide groove 116, the first ring gear 11
4 and the first slide plate 207 slide to move the spring 208.
Is extended, and the urging force firmly maintains the state in which the first guide base 118 is in contact with the positioning pin 209. As a result, the guide roller 121 and the guide posts 122, 1 provided on the first guide base 118 are provided.
The delicate angle of 23 will be accurately maintained.

Further, the other loading guide groove 117
The second guide base 127 has a pair of guide pins 12.
8 and 129, the guide rollers 130 and the guide posts 131 are vertically installed on the second guide base 127. Also,
As shown in FIG. 18, at a position near the end of the loading groove 117, a positioning pin 212 that abuts on the second guide base 127 and regulates the position is provided upright. At the position where the second guide base 127 comes into contact with the positioning pin 212, the guide post 131 and the guide roller 130 that are erected on the second guide base 127 are positioned relative to the rotary head 112 as shown in FIG. The rotary head 112 is tilted in a slightly downward direction, not in parallel.
Magnetic tape 1 for the leads (not shown) provided on the
Are pressing against.

On the other hand, as shown in FIGS. 20 and 21, the second
The guide base 127 is connected to the second ring gear 115 by a connecting lever 132. That is, the second ring gear 115 is provided with two long holes 115a and 115b, and the second slide plate 210 is mounted in the long holes 115a and 115b via a pin so as to be slidable in the radial direction. The second slide plate 210 and the second guide base 127 are connected by a connecting lever 132. Further, the second slide plate 210 and the second ring gear 115 have springs 2 for obtaining a biasing force in the radial direction.
11 is interposed. Therefore, when the second guide base 127 comes into contact with the positioning pin 212 at the end position of the loading guide groove 117, the second ring gear 11
5 and the second slide plate 210 slide to move the spring 211.
Expands, and the urging force firmly maintains the state in which the first guide base 118 is in contact with the positioning pin 212. As a result, the delicate angles of the guide roller 130 and the guide post 131 provided on the second guide base 127 are accurately maintained. An impedance roller 133 is mounted on the ring holder 113 adjacent to the loading guide groove 117.

Therefore, when the first ring gear 114 and the second ring gear 115 rotate in opposite directions, respectively,
The guide base 118 can move along the loading guide groove 116 by transmitting the driving force through the connecting lever 124. At this time, the guide pin 126
Are guided by the guide portion 125, the guide pins 119, 120 are provided at one end of the loading guide groove 116.
Are distributed to each of the two 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.

Then, the loading guide grooves 116, 1
The first and second guide bases 118,
When the 127 moves and contacts the positioning pins 209 and 212, and the state is maintained by the springs 208 and 211, the first and second guide bases 118 and 127.
Since the upper guide post 123 and the guide roller 121, the guide post 131, and the guide roller 130 are located on the inlet side and the outlet side of the rotary head drum 212 and are slightly inclined with respect to the rotary head drum 112, they are schematically shown in FIG. As described above, the elevation angle φ is provided to the magnetic tape 1 when the rotary head drum 112 enters and exits, whereby the magnetic tape 1 is pressed against the leads 212a of the rotary head drum 212, and the magnetic tape 1 moves up and down. It will be suppressed and the vehicle will run stably. Here, the inclination of the guide bases 118 and 127 should be such that the running stability of the magnetic tape 1 can be sufficiently achieved, and for example, an angle of 1 ° or less is selected. In addition, the two guide posts 122, 1 are provided on the second guide base 118.
Since 23 is provided, the magnetic tape 1 can be largely lifted, so that the tape path can be shortened and it is not necessary to provide another guide base on the exit side of the rotary head drum 112. Further, the guide post 131 on the second guide base 127 may be omitted if stable running can be obtained.

Next, the magnetic tape running mechanism will be described. As shown in FIG. 4, the capstan (shaft) 134 and the capstan gear 1 are provided on the rear side of the base chassis 71.
A capstan motor 136 having 35 is attached, and the capstan gear 135 is meshed with an adjacent gear pulley 137. On the other hand, 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. The turntable 138 on the supply reel 3 side and the turntable 13 on the take-up reel 4 side
Gear portions 140 and 141 are formed on the outer peripheral portion of the gear 9, respectively. A gear pulley 142 is attached to the base chassis 71 between the turntables 138 and 139, a belt 143 is wound around the gear pulley 137, and a rotation shaft 144 of the gear pulley 142 is attached.
Penetrates the long hole 145 of the slide chassis 15.
Further, a bracket 146 is pivotally mounted on the rotary shaft 144 above the slide chassis 15, and an idle gear 147 that meshes with the gear pulley 142 is mounted on the bracket 146. A clutch member (not shown) that generates rotational friction is provided between the bracket 146 and the idle gear 147.

Therefore, when the capstan motor 136 is driven, the capstan gear 135 rotates, and the rotational force thereof is 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 rotational force is the rotational force in the clockwise direction of the gear pulley 142, the idle gear 147 (bracket 146)
In FIG. 1, the gear portion 14 of the turntable 139 on the take-up reel side is moved to the right around the rotary shaft 144.
It is possible to rotate the turntable 139 in the clockwise direction (the feeding direction of the magnetic tape 1) via the idle gear 147 while meshing with 1. If the transmitted rotational force is the rotational force in the counterclockwise direction of the gear pulley 142, the idle gear 147 (bracket 146) is moved leftward around the rotation shaft 144 in FIG. Gear portion 140 of table 138
It is possible to rotate the turntable 138 in the counterclockwise direction (rewinding direction of the magnetic tape 1) via the idle gear 147 while engaging with. The clutch member described above generates the moving force of the idle gear 147.

As shown in FIG. 1, the slide chassis 15
A guide roller 148 for guiding the magnetic tape 1 at the time of loading and a guide post 149 are movably provided on one side portion (the left portion in FIG. 1). That is, the middle portion of the two links 150, 151 is rotatably attached to the slide chassis 15 by being pivotally supported by the pivots 152, 153, and one end of each link 150, 151 has an engaging pin 154. , 155 penetrate the guide hole 156 to form the guide groove 15 formed in the base chassis 71.
7, 158, and a guide roller 148 and a guide post 149 are attached to the other ends, respectively. Therefore, the slide chassis 15 is rearward (upward in FIG. 1).
Moving to the guide groove 15
The movement is restricted by 7, 158, and each link 15
0 and 151 respectively rotate counterclockwise. When the links 150, 151 rotate by a predetermined amount, the engagement pins 154, 155 move along the guide grooves 157, 158, thereby causing the guide rollers 148 and the guide rollers 148 provided at the other ends of the links 150, 151 to move. The guide post 149 can move to a predetermined position via a predetermined locus.

As shown in FIG. 1, the magnetic tape 1 is guided to the other side portion (right side in FIG. 1) of the slide chassis 15 at the time of loading, and at the time of traveling of the magnetic tape 1, the gap between the magnetic tape 1 and the capstan 134. A pinch roller 159 for guiding the magnetic tape 1 and a guide roller 160 are movably provided. That is, the slide chassis 1
5, a pinch arm 161 having a pinch roller 159 mounted at one end is rotatably attached by a pivot 162, and a support arm 165 having first and second guide pins 163, 164 is also rotatable by the pivot 162. Installed on. And each arm 161,
A spring 166 is stretched between 165 and
Pinch arm 161 in the counterclockwise direction in FIG.
The support arms 165 are urged so as to attract each other in the clockwise direction. In addition, the first and second guide pins 163 and 164 of the support arm 165 engage with the arc-shaped first and second guide grooves 167 and 168 formed in the slide chassis 15, respectively, and the support arm 165 and the slide chassis 15 are provided. A spring 169 is stretched between and to urge the support arm 165 in the counterclockwise direction in FIG.

On the other hand, the base chassis 71 is formed with a restricting portion 170 for restricting the movement of the second guide pin 164. As described above, the operating lever 102 is rotatably attached to the base chassis 71 by the pivot 103, and the operating lever 102 is provided with the engaging groove 171. In addition, the slide chassis 15
Adjacent to the pinch arm 161 is a guide arm 172.
Is rotatably mounted by a pivot 173 and is biased counterclockwise in FIG. 1 by a spring 174.

Therefore, when the slide chassis 15 moves rearward (upward in FIG. 1), the movement of the second guide pin 164 of the supporting arm 165 is restricted by the restricting portion 170, and the supporting arm 165 and the pinch arm 161 rotate clockwise. Rotate in the direction. When the support arm 165 rotates by a predetermined amount, the second guide pin 164 is disengaged from the restriction portion 170 and the movement restriction is released, and the first and second guide pins 1
63 and 164 move along the guide grooves 167 and 168, respectively, and the first guide pin 163 is fitted into the engaging groove 171 of the operating lever 102. At this time, as shown in FIG. 4, the second cam groove 90 of the cam gear 88 rotates the actuating lever 102 through the connecting link 96 and the connecting lever 99 in the counterclockwise direction in FIG. Support arm 1 via groove 171 and first guide pin 163
65 and the pinch arm 161 are rotated clockwise. In this way, the pinch roller 159 can move to a position where it abuts on the capstan 134 via a predetermined locus.

Further, 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 for restricting rotation of the take-up reel 4 in the pull-out direction (counterclockwise direction in FIG. 1) of the magnetic tape 1 at the time of loading is provided on the take-up reel 4 side. . 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 by the pivot 185 on the slide chassis 15. It is movably attached and is provided with a rotational friction by an urging member (not shown).

The 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 an engagement piece 189 engageable with an engagement pin 187 is attached to the operation lever 188. Are integrally formed. The operation pin 188 is attached to the operation lever 188.
While 0 is fixed, the operation lever 192 pivotally attached to the base chassis 71 is formed with an operation groove 191 into which the operation pin 190 is inserted. Further, the operating lever 102 is integrally formed with an engaging piece 192 that can be directly engaged with the engaging pin 187 of the ratchet brake lever 184.

Therefore, when the magnetic tape 1 is loaded, the ratchet brake lever 184 causes the locking claw 183 to move the ratchet 182 of the turntable 139 on the take-up reel side by the previous loading and unloading operations.
The magnetic tape 1 is held in a state of being locked to the take-up reel 4 and the magnetic tape 1 is pulled out in the pull-out direction (see FIG. 1).
In the counterclockwise direction) is prevented. At this time, when the actuating lever 102 is rotated counterclockwise about the pivot 103, the operating lever 188 rotates clockwise in FIG. 1 via the operating groove 191 and the operating pin 190. Then, the engagement piece 189 is engaged with the engagement pin 1.
By pressing 87 to rotate the ratchet brake lever 184 counterclockwise in FIG.
The ratchet 182 is released from the lock, the restraint of the turntable 139 is released, and the take-up reel 4 is rotatable in the drawing direction of the magnetic tape 1.

After the loading is completed, when the operating lever 102 is rotated counterclockwise about the pivot 103, the engaging piece 192 is engaged with the engaging pin 1 in the same manner as described above.
By pressing 87 to rotate the ratchet brake lever 184, 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 side of the supply reel 3, a soft brake 193 for restricting the rotation of the magnetic tape 1 in the magnetic tape supply direction due to the inertial force of the magnetic tape supply reel 3 at the time of loading, and the completion of loading. At the same time, a ratchet brake 194 for restricting rotation in the magnetic tape supply direction is also provided. That is, the band brake 195 is wound 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.
The other end is connected to the 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 is in pressure contact with the outer peripheral portion of the turntable 138 is attached to the tip end portion thereof.

On the other hand, the ratchet brake lever 200 is also rotatably attached to the slide chassis 15 by a pivot shaft 198, and an engaging claw 201 for engaging with the gear portion 140 of the turntable 138 is integrally formed at the tip end portion 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 press contact member 199 presses the outer peripheral portion of the turntable 138. The ratchet brake lever 200 moves in the counterclockwise direction, that is, the locking claw 201 moves to the gear portion 14 of the turntable 138.
It is urged in the direction of locking 0.

The soft brake lever 197 and the ratchet brake lever 200 have cam pins 2 respectively.
03 and 204 are fixed. On the other hand, the drive arm 91
A cam surface 205 as a control unit for controlling the operation of each lever 197, 200 is formed on the cam gear 205, and a cam groove 206 for controlling the operation of the lever 200 is formed on the cam gear 88.

Therefore, 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 press contact member 199 presses the turntable 138 on the supply reel side, and the magnetic tape is pressed. Rotation in the magnetic tape supply direction (clockwise direction in FIG. 1) by the inertial force of the supply reel 3 is prevented. Further, the ratchet brake lever 200 is held in that position by the cam surface 205 of the drive arm 91 contacting the cam pin 204, and the locking claw 201 is not locked by the gear portion 140 of the turntable 138 on the supply reel side.
The rotation of the supply reel 4 at the time of loading is not blocked.

When the slide chassis 15 is moved rearward (upward in FIG. 1) and loading is performed from this state, the drive arm 91 rotates counterclockwise in FIG. 1, and the cam surface 205 of the drive arm 91 causes the cam pin 203 to move. Through the soft brake lever 197 to the spring 202
Rotate counterclockwise against the urging force of. Then, the pressure contact of the turntable 138 by the pressure contact member 199 is released, and the rotation restriction of the supply reel 3 is released.
On the other hand, with this operation, 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 biasing force of the spring 202 by the locking claw 201 to the gear portion 140 of the turntable 139. When the loading is completed, the supply reel 3 is prevented from rotating in the magnetic tape supply direction. Further, after the loading is completed, when the cam gear 88 is further rotated, the ratchet brake lever 184 is rotated by the cam groove 206 via the cam pin 204, whereby the locking claw 201 is formed.
The locking of the gear portion 140 by the
The rotation restriction of is released.

The operation flow of the above-mentioned storage of the cassette 2 in the 8 mm video, loading of the magnetic tape 1 and running drive will be described below.

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 from the front into the cassette holder 11 in the raised position. When the cassette holder 11 is pushed down from 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 to accommodate the cassette case 2. The cassette holder 11 moves to the lowered position. At this time,
The cassette holder 11 (cassette case 2) can be lowered while maintaining a horizontal state, and the left and right lifting mechanisms 16 and 1
The movement of the arms 20 and 30 in FIG.
By interlocking with each other by the connecting rod 42 via the pinions 40, 41, the left and right lifting mechanisms 16, 17
Will operate synchronously, and the cassette holder 11
It is prevented from twisting or tilting when descending.

As shown in FIGS. 13 and 15, when the cassette holder 11 descends, the cassette holder 1
1 is in the lowered position and is restrained by the lock mechanism 48. That is, when the arms 29 and 30 of the lifting mechanism 17 are tilted, the locking pin 55 is also lowered, and the hook 50 is attached to the locking pin 55.
Engage. Therefore, the arm 30 is prevented from standing up and the cassette holder 11 is restrained in 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) that controls the drive motor and the like, and the microcomputer drives the motor drive circuit. The drive motor 81 is driven via the, and the slide base 15 on which the cassette holder 11 is supported starts to move.

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

Therefore, when the cassette holder 11 (cassette case 2) descends, even if the magnetic tape 1 adheres to the back side of the lid 5 due to static electricity accompanying the opening of the lid 5 of the cassette case 2, the magnetic tape 1 1 and rotary head drum 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 is locked in that position by the lock mechanism 48, the drive motor 81 is driven to slide the slide base 15 on which the cassette holder 11 is supported. That is, as shown in FIGS. 1 and 4, when the drive motor 81 is driven, the driving force is generated by the drive gear 80 and the connecting gears 8.
Cam gear 8 through 2,83,84,85,86,87
8 and the cam gear 88 rotates. Then,
With the first cam groove 89 of the cam gear 88, the drive arm 91 is rotated counterclockwise in the figure via the cam shaft 95, and as shown in FIGS. Base chassis 71
It moves backward (upward in the figure) along and stops at a predetermined position.

The magnetic tape 1 is loaded as the slide chassis 15 is slid by the drive motor 81. That is, the ejecting (lowering) position of the slide chassis 15 shown in FIGS. 1 and 4 is the 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. Then, the loading state of the magnetic tape 1 shown in FIGS. 2 and 5 is set.

As shown in FIGS. 2 and 5, the drive motor 8
When 1 is driven, as described above, the cam gear 88 rotates, the driving force thereof 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 are in different directions. That is, the first ring gear 114 rotates in the counterclockwise direction and the second ring gear 115 rotates in the clockwise direction in FIG. 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.
The guide pins 119 and 120 are the loading guide grooves 1
While being guided by 16, the guide pin 126 moves while being guided by the guide portion 125. Then, when the first guide base 118 moves to the terminal end portion of the loading guide groove 116, the guide pins 126 are constrained by the guide portion 125, so that the guide pins 119, 12 are formed.
0 moves while being divided into two forked portions of the loading guide groove 116.

Therefore, the magnetic tape 1 in the cassette case 2 has the guide roller 121 of the first guide base 118, the guide posts 122 and 123, and the second guide base 127.
Is pulled out by the guide roller 130 and the guide post 131 and slidably contacts the outer peripheral surface of the rotary head drum 112.

The magnetic tape 1 is loaded by the movement of the first and second guide bases 118 and 127, and also loaded by a plurality of guide rollers or guide posts on both sides of the rotary head drum 112. As shown in FIGS. 1 and 2, at one side of the slide chassis 15, the slide chassis 15
Moves backward, pin 1 of each link 150, 151
54 and 155 move by the guide grooves 157 and 158, and the links 150 and 151 rotate, respectively.
Then, the guide roller 148 of each link 150, 151
And 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 second guide pin 164 of the support arm 165 is restricted by the restriction part 170 so that 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 disengages from the restricting portion 170, and the first and second guide pins 163 and 164 move along the guide grooves 167 and 168 to move the first guide pin 165. 163
Fits into the engaging groove 171 of the operating lever 102. In this way, the pinch roller 159 moves to pull out the magnetic tape 1. Further, when the pinch roller 159 moves, the guide arm 172 rotates to move the guide roller 160.
Guides the magnetic tape 1.

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

When the magnetic tape 1 is loaded, as shown in FIG. 1, the ratchet brake lever 184 on the take-up reel 4 side causes the locking claw 183 to move to the take-up reel side turntable 139 by the previous loading and unloading operations. The ratchet 182 is held in a locked state, and rotation of the magnetic tape 1 in the pull-out direction (counterclockwise direction in FIG. 1) at the time of loading on the take-up reel 4 is prevented. Therefore, the magnetic tape 1 is not pulled out from the take-up reel 4 at the time of loading, and is prevented from being recorded again on the recorded magnetic tape 1 wound on the take-up reel 4.

By the way, when the magnetic tape 1 in the cassette case 2 inserted in the cassette holder 11 is entirely wound around the take-up reel 4 and there is no magnetic tape 1 wound around the supply reel 3, loading is performed. I can't
The magnetic tape 1 is cut. In this case, this is detected by a detector (not shown), and the operating lever 102 is rotated counterclockwise around the pivot 103 from the state shown in FIG. 1 to rotate the operating lever 188 clockwise. Then, the engagement piece 189 is engaged with the engagement pin 187.
By pressing to rotate the ratchet brake lever 184 in the counterclockwise direction, the locking of the ratchet 182 by the locking claw 183 is released, and the turntable 139 is released from the constraint. It can be rotated in the pulling direction.

When loading the magnetic tape 1,
As shown in FIG. 1, the soft brake lever 197 is rotated in the magnetic tape supply direction by the inertial force of the supply reel 3 when the pressing member 199 is pressed 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 in that position by the cam surface 205 of the drive arm 91 contacting the cam pin 204, and the locking claw 201 is not locked by the gear portion 140 of the turntable 138. The rotation of the supply reel 3 is not blocked. Then, when the loading is completed, as shown in FIG.
The holding of the cam pin 204 by 05 is released, and the ratchet brake lever 200 is locked by the spring 202 by the locking claw 201 to the gear portion 140 of the turntable 138, so that the supply reel 3 is prevented from rotating in the magnetic tape supply direction. To be done.

As described above, the magnetic tape 1 includes the guide rollers 121, 130, 148, 160, the guide posts 122, 123, 131, 149, and the pinch roller 159.
Thus, 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 in this state, the drive motor 81 is driven again, and as shown in FIGS. 3 and 6, the cam gear 88 rotates and the second cam groove 90 causes the connecting link 96 and The operating lever 102 is rotated counterclockwise in FIG. 5 via the connecting lever 99.
Then, the support arm 165 and the pinch arm 161 are rotated clockwise through the engagement groove 171 of the operating lever 102 and the first guide pin 163. Therefore, 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.

Further, as described above, the operating lever 102
When is rotated, the engaging piece 192 pushes the engaging 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, whereby the locking claw 201 is released.
The locking of the gear portion 140 by the
The rotation restriction of is released.

In this way, the supply reel 3 and the take-up reel 4
When the rotation restriction is released, the take-up reel 4 is driven to rotate and the magnetic tape can run. That is, as shown in FIG. 3, when the capstan motor 136 is driven, the capstan gear 135 rotates and its 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 rightward about the rotary shaft 144, and the idle gear 147 turns the turntable 139 on the take-up reel side.
Mesh with the gear part 141 of the. Therefore, the idle gear 14
The rotational force of No. 7 is transmitted to the turntable 139, and the turntable 139 rotates clockwise. Then, the take-up reel 4 rotates in the same direction and the magnetic tape 1
Runs in the feed direction. Then, recording or reproduction can be performed as the magnetic tape 1 runs.

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

When 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 is stopped, the rotation of the take-up reel 4 is stopped and the magnetic tape 1 is driven. The motor 81 rotates in the opposite direction, and the pinch roller 159 moves the capstan 13
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 its rotation, and the ratchet brake 194 prevents the take-up reel 4 from rotating.
Restrain the rotation 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 to release the loading of the magnetic tape 1 and return it into the cassette case 2, and the slide chassis 15 moves forward. It slides (downward in FIGS. 2 and 5) to the unloading state shown in FIGS. 1 and 4.

When the slide chassis 15 moves to the eject position (unloading state) shown in FIGS. 1 and 4, the base chassis 7 is moved as shown in FIGS. 13 and 14.
The protrusion 56 of the hook 50 contacts the release lever 105 of No. 1 and the hook 50 rotates counterclockwise against the urging force of the spring 51 to release the engagement with the locking pin 55. It Then, the arms 29, 3 of the lifting mechanism 17
0 is erected by the urging force of the spring 37, and the arms 19, 20 of the elevating mechanism 16 are erected by the urging force of the spring 27, and the cassette holder 11 is raised.

When the cassette holder 11 is raised by the elevating 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 erected, its rear end moves forward together with the slide member 45. Then, by rotating the pinion 46 via the rack 44, the rotation of the pinion 46 is moderated by the action of the oil damper 47, and the cassette holder 1
The shock and vibration at the time of lifting and lowering of No. 1 are alleviated and the operation is gentle.

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

[0092]

As described above in detail with reference to the embodiments, according to the tape loading mechanism of the present invention, in the magnetic recording / reproducing apparatus, the guide base is provided so as to press the magnetic tape against the lead of the rotary head drum. Since the rotary head drums are arranged at the inlet side and the outlet side at a predetermined angle, the magnetic tape is restrained from moving up and down, and stably runs, which has the advantage of improving the image quality. Furthermore, since the guide post and the guide roller can be vertically installed on the guide base, the manufacturing becomes easier as compared with the case where the guide post is installed upright on the guide base. Further, since the guide roller on the guide base is erected in parallel with the guide post, it is possible to prevent the magnetic tape from being twisted or curled.

[Brief description of drawings]

FIG. 1 is a plan view of a slide chassis equipped with a reel brake drive mechanism according to an exemplary embodiment of the present invention, showing an eject state in an 8 mm video.

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 eject state in 8 mm video.

FIG. 5 is a plan view of the 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 showing a tape loading mechanism.

FIG. 8 is a schematic view showing 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 stored state.

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

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

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

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

FIG. 18 is an explanatory diagram showing an arrangement of a second guide base and positioning pins.

FIG. 19 is an explanatory diagram of a guide post and a guide roller that are vertically provided on the second guide base.

FIG. 20 is an explanatory diagram of a plurality of guide posts and guide rollers that are erected on the first and second guide bases.

FIG. 21 is an explanatory diagram showing a connection between a second guide base and a second ring gear.

FIG. 22 is an explanatory diagram showing a connection between a first guide base and a first ring gear.

FIG. 23 is an explanatory diagram showing an elevation angle φ generated on the magnetic tape when the rotary head drum enters and exits.

FIG. 24 is an explanatory diagram of a conventional general tape loading mechanism.

FIG. 25 is an explanatory diagram showing a state where a magnetic tape is pressed against a lead of a rotary head drum.

[Explanation of symbols]

 1 magnetic tape 2 cassette case 3 supply reel 4 take-up reel 11 cassette holder 15 slide chassis 16,17 lifting mechanism 48 lock mechanism 71 base chassis 81 drive motor 88 cam gear 89, 90 cam groove 91 drive arm 102 actuating lever 112 rotary head drum 136 capstan motor 138, 139 turntable 140, 141 gear part 159 pinch roller 193 soft brake 194 ratchet brake 197 soft brake lever 200 ratchet brake lever 202 spring 203, 204 cam pin 205 cam face 206 cam groove 207 first slide plate 208 spring 209 Positioning pin 210 Second slide plate 211 Spring 212 Positioning pin φ Elevation angle

Claims (1)

[Claims] 1. A plurality of guide posts and guide rollers are arranged between a supply reel and a take-up reel housed in a cassette and a rotary head drum inclined to the cassette side, and the guide post and the guide roller are arranged at the time of loading. Of the guide rollers, the guide post and the guide roller arranged on the guide base are respectively moved to the inlet side and the outlet side of the rotary head drum to pull out the magnetic tape from the cassette and slant to the rotary head drum. In the tape loading mechanism wound around the guide base, the guide post and the guide roller are erected vertically on the guide base, while the guide base is
A tape loading mechanism characterized in that the magnetic tape is disposed at an inlet side and an outlet side of the rotary head drum so as to be pressed against the lead of the rotary head drum with a certain angle of inclination with respect to the lead.