JP2840167B2 - Tape deck and method of assembling the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape deck incorporating a tape loading mechanism with good assembling workability and a method of assembling the tape deck, and is particularly suitable for application to an 8 mm video tape deck.

[0002]

2. Description of the Related Art A video tape deck employs a structure in which a video tape is wound around an inclined rotating drum in which a head for recording and reproducing image information is incorporated, so that the video tape is pulled out from a video tape cassette and rotated. It has to be wound around a drum, and various types of tape loading mechanisms have been conventionally proposed.

As shown in FIG. 18 showing an example of such a tape loading mechanism, a rotating drum incorporating a recording / reproducing head (not shown) is attached to the deck chassis 000 in an inclined state, and surrounds the rotating drum. A pair of sector gears 00 each having an arc shape having a predetermined curvature.
1,002 is coaxially supported rotatably with respect to the deck chassis 000. These two sector gears 001 and 002 mesh with drive gears 003 and 004, respectively, and these drive gears 003 and 004 also mesh with each other.

[0004] A pair of loading guide grooves 005, 006 are formed on both sides of the rotating drum, and these loading guide grooves 005, 006 are respectively interposed by a pair of groove engaging pins 007, 008. The loading sliders 009 and 010 are slidably engaged.

[0005] One sector gear 0 via a link 011
01 on the loading slider 009 linked to
A guide roller 012 is rotatably mounted, and two guide posts 013 and 014 are provided upright. Similarly, a guide roller 016 is rotatably mounted on a loading slider 010 connected to the other sector gear 002 via a link 015.
17 is erected.

Therefore, by rotating one drive gear 003 connected to a drive source (not shown) in the normal or reverse direction, a pair of sector gears 001 and 002 rotate around the rotary drum in opposite directions to each other. The loading sliders 009 and 010 connected to the 002 through the links 011 and 015 respectively have the groove engaging pins 007 and 0.
08 while being guided by the loading guide groove 005,00
It moves along 6.

[0007] Such a tape loading mechanism is well known.

[0008]

In the tape loading mechanism shown in FIG. 18, in addition to the above-mentioned rotary drum for the deck chassis 000, in addition to the pair of sector gears 001 and 002 and the driving gears 103 and 104, the loading is performed. It is necessary to assemble the sliders 009, 010 and the like. In particular, it takes time to engage the loading sliders 009, 010 with the loading guide grooves 005, 006.
The phase adjustment of the meshing state with the gear 104 must be performed, and the installation space is narrow, so that the assembling workability is extremely poor.

In addition, it is necessary to secure a work space for performing these operations in the tape deck, which is one of the factors that hinder the miniaturization of the entire tape deck.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tape deck having a compact tape loading mechanism with good assembling workability and a method of assembling the same.

[0011]

A tape deck according to the present invention has a drum base on which a rotating drum is rotatably mounted, and is detachably attached to the drum base and is attached to and detached from the base chassis together with the drum base. A ring holder that is freely fixed, a pair of loading guide grooves that are formed across the ring holder and the drum base, and that face each other across the rotating drum;
A pair of loading sliders slidably engaged along these loading guide grooves and guide posts for winding the tape around the rotary drum, each of which is connected to the loading slider via a link; A pair of sector gears rotatably attached to the ring holder along the outer peripheral edge of the rotary drum; and a pair of sector gears rotatably attached to the ring holder and meshing with the sector gear to rotate the sector gears in opposite directions. And a pair of drive gears.

Further, the method of assembling a tape deck according to the present invention includes a rotating drum mounting step of rotatably mounting a rotary drum on a drum base, and a loading slider on which a guide post for winding a tape around the rotary drum is provided. Loading a slider into the loading guide groove formed in the ring holder, mounting a sector gear rotatably on the ring holder, and connecting the sector gear and the loading slider via a link. And a drive gear mounting step of rotatably mounting a pair of drive gears meshing with the sector gear to the ring holder, and after the rotating drum mounting step, the loading slider mounting step, the sector gear mounting step, the link connecting step, and the drive gear mounting step. line A drum base / ring holder assembling step of combining the drum base and the ring holder, and a step of fixing the drum base and the ring holder to the base chassis, which is performed after the drum base / ring holder assembling step. It is equipped.

[0013]

The rotary drum is rotatably mounted on the drum base in advance, and a loading slider is inserted into the loading guide groove on the ring holder side, and a sector gear connected to the loading slider via a link is rotatably mounted on the ring holder. After mounting the drive gear rotatably meshing with the sector gear on this ring holder, combine these drum base and ring holder to connect the loading guide groove, and further connect these drum base and ring holder to the base chassis. And fix it.

When the pair of drive gears rotate, the pair of sector gears rotate in opposite directions to each other. With the rotation of the sector gears, the loading slider moves along the loading guide groove via a link, and the loading slider moves. The tape is wound around the rotating drum by the guide post provided upright, or the tape is pulled back from the rotating drum.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of an embodiment in which a tape deck according to the present invention is applied to an 8 mm video tape deck (hereinafter simply referred to as a tape deck) in an eject state, a loading state, and a tape running state. 2, 3 and FIG. 4, FIG. 5, and FIG. 6, respectively, show the planar shape of the base chassis portion in the eject state, the loading state, and the tape running state in this embodiment. FIG. 7 shows a planar structure of the tape loading mechanism according to the present embodiment, and FIG. 8 shows an operation concept thereof. Furthermore, the appearance, planar shape, right side shape of the cassette holder in this embodiment,
The left side shape and the front shape are shown in FIGS. 9, 10, 11, 12, and 15, respectively, and the right side shape and the left side shape of the cassette holder with the 8 mm video tape cassette stored therein are shown in FIGS. As shown in FIG. 16 and FIG. 1 show the positional relationship between the cassette case and the rotary drum in this embodiment before and after the tape cassette is stored.
FIG.

That is, in this embodiment, the slide chassis 15
The cassette holder 11 supported by the lifting mechanism 1 described later
While being projected outward from a housing (not shown) of the tape deck by 6, 17, the tape deck can be slid to the recording / reproducing position with respect to the base chassis 71.
To FIG. 17, the cassette holder 1 in the present embodiment.
1 and its lifting mechanisms 16, 17 will be described.

FIGS. 9 to 17 omit various members related to driving of an 8 mm video tape (hereinafter, simply referred to as a tape) 1 mounted on the slide chassis 15. Further, in the present embodiment, the front or front part described below is the side where the tape cassette 2 is inserted into the cassette holder 11, and the rear or rear part is the opposite side.

As shown in FIG. 9, the tape 1 is stored in a box-shaped cassette case 2 in a state wound around a supply reel 3 and a take-up reel 4. Then, the tape 1 is exposed by opening the front lid 5 upward, so that 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 through a front opening on the left side in FIG. 11, a stopper 12 for regulating the position of the inserted cassette case 2 is formed at the rear portion on the right side. Support 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 open top, and the cassette holder 11 is supported by lifting mechanisms 16 and 17 provided on both left and right sides so as to be able to move up and down.

As shown in FIG. 11, one lifting mechanism 16
Has a pair of arms 19, 20 whose intermediate portions are connected in a crossing state by a connecting shaft 18, and these arms 19, 20
Of the cassette holder 11 via the pivots 21 and 22.
And elongated holes 23 and 24 formed at the rear end thereof are slidably connected to support shafts 25 and 26 projecting from the slide chassis 15 and the cassette holder 11, respectively. . A tension spring 27 is stretched between the arms 19 and 20, and a spring force in a direction in which the arms 19 and 20 stand up is urged by the tension spring 27.

As shown in FIG. 12, the other lifting mechanism 17
Has a pair of arms 29, 30 whose intermediate portions are connected in a crossing state by a connecting shaft 28, and these arms 29, 30
Of the cassette holder 11 via the pivots 31 and 32.
The support shaft 3 is connected to the slide chassis 15 and has long holes 33 and 34 formed at the rear end thereof.
5, 36 are slidably connected to each other. A tension spring 3 is provided between the arms 29 and 30.
The tension spring 37 extends the arm 2.
A spring force in an upright direction is urged to 9,30.

Accordingly, as shown in FIGS. 11 to 14, the cassette holder 11 is moved up and down by the arms 19 and 20 of the elevating mechanism 16 and the arms 29 and 30 of the elevating mechanism 17.
It can move up and down while maintaining a substantially horizontal state.

The cassette holder 11 is provided with a synchronization mechanism for raising and lowering the left and right lifting mechanisms 16 and 17 at substantially the same speed. Specifically, FIG. 9 and FIG. 11, FIG.
As shown in FIG. 2, one arm 2 of the lifting mechanisms 16 and 17
Racks 38 and 39 are formed above the rear ends of the cassettes 0 and 30, respectively. Pinions 40 and 41 that mesh with the racks 38 and 39 are arranged on the side of the cassette holder 11, respectively. , 41 are integrally connected to both ends of a connecting rod 42 rotatably attached to the cassette holder 11.

That is, the pair of arms 20 and 30 are connected to the pinions 40 and 41 and the connecting rod 42 by the racks 38 and 39.
, The left and right lifting mechanisms 16,
17 operate at substantially the same speed, and the drawback that the cassette holder 11 is twisted or inclined does not occur. Also, the rear ends of the arms 20, 30 are elongated holes 24, 34 formed on the rear ends of the arms 20, 30, respectively.
Are connected to the support shafts 26, 36 of the cassette holder 11 through the shafts 17, so that the pinions 40, 41 roll at substantially the same speed with respect to the racks 38, 39 with the elevating operation of the elevating mechanisms 16, 17. Thus, the right and left synchronization of the lifting mechanisms 16 and 17 is further ensured.

The left and right lifting mechanisms 16 and 17 are provided with a damper mechanism 43 for reducing shock and vibration when the cassette holder 11 is moved up and down to operate slowly.
That is, as shown in FIG. 12, a slide member 45 having one end connected to the rear end of the arm 29 and having a rack 44 engraved thereon is provided in the front and rear direction behind the slide chassis 15 on the lifting mechanism 17 side. It is provided so as to be able to reciprocate in the left-right direction in FIG. A pinion 46 meshing with the rack 44 is rotatably mounted on the side of the slide chassis 15 via an oil damper 47.

Therefore, when the cassette holder 11 is lifted by the lifting mechanism 17, the arms 29, 30 are turned in the upright direction by the urging force of the tension spring 37. At this time, the rear end of the arm 29 moves forward together with the slide member 45 to rotate the pinion 46 via the rack 44 of the slide member 45, but the rotation of the pinion 46 is gently restrained by the action of the oil damper 47. Therefore, it is possible to reduce an impact, a vibration, and the like accompanying the elevation of the cassette holder 11.

Further, each of the arms 2 is
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. That is, as shown in FIG. 12, a hook 50 is rotatably attached to a side portion of the slide chassis 15 on the side of the elevating mechanism 17 via a shaft 49, and between the hook 50 and the slide chassis 15. Is hooked over a tension spring 51, and the hook 50 is
12, and is urged counterclockwise in FIG. or,
A regulating plate 53 having a distal end abutting on the hook 50 is attached to the slide chassis 15 via a shaft 52, and the regulation is performed by a torsion coil spring 54 interposed between the regulating plate 53 and the slide chassis 15. The plate 53 is a shaft 52
12, and is urged counterclockwise in FIG.

As a result, the hook 50 is connected to the tension spring 5
The hook 50 is rotated against the spring force of FIG.
Is held at the release position shown in FIG. on the other hand,
A locking pin 55 is fixed to a portion of the arm 30 between the connecting shaft 28 and the pivot 32 that protrudes downward, and a projection 56 is integrally formed with the hook 50 at a lower portion thereof. A release lever 105, which will be described later, is swingably attached to the base chassis 71 that slidably supports.

Therefore, when the cassette holder 11 is lowered from the raised position shown in FIG. 12, the locking pin 55 is lowered as the arm 30 is tilted, and the locking pin 55 comes into contact with the regulating plate 53 so that the spring force of the torsion coil spring 54 is increased. The control plate 53 is pressed down against the pressure, and the hook 50 held at the release position by the control plate 53 is moved by the spring force of the tension spring 51 as shown in FIG.
From the state shown in FIG. Then, as shown in FIG. 14, the hook 50 is engaged with the locking pin 55 to prevent the arm 30 from rising, and the cassette holder 11 is restrained at the lowered position.

On the other hand, as the release lever 105 of the base chassis 71, which will be described later, swings, the release lever 105 presses against the protrusion 56 of the hook 50, and the hook 50 moves leftward against the spring force of the extension spring 51. When pivoted around,
The engagement with the locking pin 55 is released. As a result, the arms 29 and 30 are erected by the urging force of the tension spring 37, and the cassette holder 11 is raised.

The reference numerals 57 and 57 in FIGS.
58 is one arm 20 of the lifting mechanism 16 and the lifting mechanism 1
7 is a detection switch for detecting a tilted state of one arm 30, that is, a lowered state of the cassette holder 11.

In the tape deck, the lid 5 of the cassette case 2 is opened with the descending operation of the cassette holder 11. At this time, the tape 1 adheres to the back side of the lid 5 due to static electricity. In this embodiment, a tape protector 61 for preventing the tape 1 from running over the rotating drum is provided in the cassette holder 11 because there is a possibility that the loading cannot be performed, as shown in FIGS.

That is, the elevating mechanism 17 of the cassette holder 11
A pivot member 63 is pivotally mounted via a pivot 62 on the rear side of the side, and two projecting pieces 64 and 65 are integrally formed on the outer periphery of the pivot member 63, and one The rear end of the arm 29 of the lifting mechanism 17 can abut on the piece 64. Bell crank 6 adjacent to this rotating member 63
6 is rotatably supported by the cassette holder 11 via a shaft 67, and one end of the bell crank 66 extending downward can come into contact with one protruding piece 65 of the rotating member 63. An elongated hole 68 is formed at the other end extending horizontally. A base end of a tape protector 61 is rotatably mounted on a rear portion of the cassette holder 11 near the other end of the bell crank 66 via a pivot 69. The connecting pin 70 protruding from the base end is engaged with the elongated hole 68 of the bell crank 66.

Therefore, when the cassette holder 11 holding the cassette case 2 is at the raised position, the lid 5 of the cassette case 2 is closed, and the tape protector 61 is at a predetermined angle θ as shown by a solid line in FIG. Looking downward, FIG.
As shown in (1), the tip of the tape protector 61 is located almost directly above the outer peripheral edge of the rotary drum 112 mounted on the base chassis 71.

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 tape 1 is exposed from the cassette case 2. On the other hand, the arms 29 and 30 of the lifting mechanism 17 are tilted,
15 comes into contact with the protruding piece 64 of the rotating member 63 and gradually rotates it counterclockwise in FIG. This allows
The protruding piece 65 of the rotating member 63 contacts one end of the bell crank 66 to raise the other end, and retreats the tape protector 61 to a position shown by a two-dot chain line in FIG. Rotate. This tape protector 61
Is performed with a delay with respect to the opening operation of the lid 5 of the cassette case 2 and ends immediately before the tape 1 exposed from the cassette case 2 faces the outer peripheral surface of the rotary drum 112. .

Next, a drive mechanism of the slide chassis 15, a tape loading mechanism, a tape running mechanism, and the like will be described with reference to FIGS. 1 to 6 omits various members related to the cassette holder 11 mounted on the slide chassis 15.

As shown in FIGS. 1 and 4, a base chassis 71 having a rectangular plate shape is fixed in a casing (not shown), and four support pins 72, 73, 74 and 75 are respectively provided upright. I have. On the other hand, slide holes 76, 77, 78, and 79 are formed on the left and right sides of the slide chassis 15 along the front-rear direction, which is the vertical direction in FIG. 4, and these slide holes 76 to 79 support the base chassis 71. Pin 7
2 to 75 are slidably engaged, so that the slide chassis 15 can move 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, FIG.
As shown in FIG. 7, a drive motor 81 having a drive gear 80 is mounted on the rear side of the base chassis 71, and a first connection gear 82 meshes with the drive gear 80. A third connection gear 84 meshes with a second connection gear 83 coaxially integrated with the first connection gear 82, and a fifth connection gear 86 meshes with a fourth connection gear 85 coaxially integrated with the third connection gear 84. The sixth connection gear 87 meshes with the fifth connection gear 86, and the sixth connection gear 87 engages with the cam gear 8.
8 are engaged. A first cam groove 89 is formed on the upper surface of the cam gear 88, and a second cam groove 90 is formed on the lower surface.

Further, the base end of a drive arm 91 is pivotally connected to the base chassis 71 via a pivot 73 adjacent to a cam gear 88, and a connecting shaft 92 is fixed to the distal end of the drive arm 91. Have been. On the other hand, a support bracket 94 having a connection groove 93 is attached to the slide chassis 15.
Are slidably engaged with each other. The first cam groove 8 of the cam gear 88 is provided at an intermediate portion of the drive arm 91.
9 are attached.

Accordingly, when the drive motor 81 operates, the driving force is transmitted from the drive gear 80 to the first connection gear 82, the second connection gear 83, the third connection gear 84, the fourth connection gear 85, the fifth connection gear 85, and the fifth connection gear 85.
The driving arm 9 is transmitted by the connecting gear 86, the sixth connecting gear 87, and the cam gear 88 in this order, and the cam follower 95 is engaged with the first cam groove 89 as the cam gear 88 rotates.
1 rotates around the pivot 73 so that the slide chassis 15 can be moved along the base chassis 71 via the connection shaft 92 and the connection groove 95.

A swing lever 96 is mounted on the base chassis 71 located on the opposite side of the pivot 73 with the cam gear 88 therebetween.
Is pivotally connected via a pivot 97 so as to be freely rotatable. The swing lever 96 has a bell crank shape, and a cam follower 98 that engages with the second cam groove 90 of the cam gear 88 is attached to the other end. One end of a link 99 is provided at an intermediate portion of the swing lever 96 with a connecting pin 100.
The operation lever 102 is connected to the other end of the link 99 via a connection pin 101. One end of the operating lever 102 is pivotally attached to the base chassis 71 via a pivot 103 so that the pinch roller 159 and the ratchet brake lever 18 which will be described later.
4 is controlled.

The cam gear 88 has a lock control gear 1
The lock control gear 104 is cam-engaged with the release lever 105 pivotally attached to the base chassis 71 at one end, and synchronized with the rotation of the lock control gear 104. The other end of the release lever 105 swings up and down in FIG.

Accordingly, 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 protrusion 56 of the hook 50 of the lock mechanism 48 mounted on the cassette holder 11 described above. , The hook 50 can be controlled to be released.

Here, the tape loading mechanism will be described. As shown in FIGS. 1, 4 and 7, the cam gear 88 has intermediate gears 107 and 108 and a first drive gear 10
9, the second drive gear 110 is meshed in order. on the other hand,
A rotary drum 112 is attached to a drum base 111 which is detachably screwed to a substantially central portion of the base chassis 71 in an inclined state. The ring holder 113 is detachably screwed to the base chassis 71. The first sector gear 114 and the second sector gear 11
5 are rotatably mounted in a vertically overlapping state, and the first sector gear 114 is engaged with the first drive gear 109 rotatably mounted on the ring holder 113, while the second sector gear 115 is mounted on the ring holder 113. The second drive gear 110 rotatably attached is engaged.

In this embodiment, the pair of sector gears 11
In order to allow rotation of the cam gear 88, the connecting gears 82 to 87 connected to the cam gear 88, the driving gear 80 of the driving motor 81, and the lock control gear 104 before the tape loading by 4,115 and after the tape loading is completed, Cam gear 88 meshing with intermediate gear 107
Are sector gears, and an area where the intermediate gear 107 does not rotate with respect to the rotation of the cam gear 88 is set.

Accordingly, when the driving motor 81 is driven, the driving force is reduced by the driving gear 80 and the connecting gears 82 to 82.
87 and the cam gear 88 to the first drive gear 109 and the second drive gear 110.
9 and the second drive gear 110 rotate in mutually opposite directions.
Thus, the first sector gear 114 and the second sector gear 115 meshing with the first drive gear 109 and the second drive gear 110 respectively rotate around the rotary drum 112 in opposite directions.

On both sides of the rotary drum 112, arc-shaped loading guide grooves 116 and 117 extending over the drum base 111 and the ring holder 113 are formed. At one end 116a of one loading guide groove 116, a branch groove 116b is formed in a state of being bent from the middle.
The first loading slider 118 is slidably engaged via a pair of groove engaging pins 119 and 120. A first sector gear 114 is connected to the first loading slider 118 via a link 124. On the first loading slider 118, a guide roller 121 and two guide posts 122, 123 are erected. Have been. A template 125 is formed on the drum base 111 and the ring holder 113 along the loading guide groove 116, and a copying pin 126 guided by the template 125 is fixed to the first loading slider 118.

In the other loading guide groove 117, a second loading slider 127 is provided with a pair of groove engaging pins 1.
28 and 129 are slidably engaged. The second loading slider 127 connected to the second sector gear 115 via the link 132 has a guide roller 13
0 and a guide post 131 are erected. The ring holder 113 has a loading guide groove 117.
, An impedance roller 133 is mounted.

Therefore, the first sector gear 114 and the second sector gear 115 are rotated in opposite directions.
, The first loading slider 118
Moves along the loading guide groove 116 via the link 124, while the second loading slider 127 moves along the loading guide groove 117 via the link 132.

At this time, the first loading slider 118
Since the scanning pin 126 is guided by the template 125, the groove engaging pin 119 is drawn toward the branch groove 116b at one end of the loading guide groove 116, while the groove engaging pin 120 is moved to the one end of the loading guide groove 116. 116a, the first loading slider 118 is turned by approximately 90 degrees from the state before the tape loading.

In this embodiment, the sector gears 114 and 115, the drive gears 109 and 110, and the loading guide grooves 116 and 117, which constitute the main parts of the tape loading mechanism, are used.
And the loading sliders 118 and 127 are assembled separately to the drum chassis 111 and the ring holder 113 with respect to the base chassis 71 in advance.
1 and the ring holder 113 can be mounted on the base chassis 71. For this reason,
The assembly workability of the tape loading mechanism can be significantly improved as compared with the conventional one.

In other words, the rotary drum 112 is rotatably mounted on the drum base 111 in the rotary drum mounting step, while the pair of sector gears 114, 115 and these sector gears 114 are mounted on the ring holder 113 in the sector gear mounting step and the drive gear mounting step. , 115 are rotatably mounted with the driving gears 109, 110 meshing with each other, and the loading sliders 118,
127 is inserted into the loading guide grooves 116 and 117, and the sector gears 114 and 115 and the loading slider 11 are connected via the links 124 and 132 in the link connecting step.
8 and 127, and the drum base 111 and the ring holder 113 are combined in the drum base / ring holder assembling process.
11 and the ring holder 113 are detachably screwed to the base chassis 71.

In this case, the loading sliders 118 and 127 can be inserted into the loading guide grooves 116 and 117 in the loading slider mounting step prior to the drum base and ring holder assembling step described above. On the other hand, the labor for mounting the loading sliders 118 and 127 is very simple, and the phase adjustment between the sector gears 114 and 115 and the loading sliders 118 and 127 is extremely easy.

Next, the magnetic tape traveling mechanism will be described. As shown in FIGS. 1 to 4, a capstan 134 and a capstan 1 are provided on the rear side of the base chassis 71.
A capstan motor 136 having a capstan gear 135 integrated with the gear 34 is mounted, and a gear pulley 137 meshes with the capstan gear 135. On the other hand, a supply turntable 138 to which the supply reel 3 in the cassette case 2 is connected to the slide chassis 15,
A take-up turntable 139 to which the take-up reel 4 is connected is rotatably mounted at a predetermined position. Supply turntable 138 and winding turntable 139
The gear portions 140 and 141 are integrally formed on the outer peripheral portion. Further, a gear pulley 142 located between the supply turntable 138 and the winding turntable 139 is attached to the base chassis 71, and an endless belt 143 is wound around the gear pulley 142 and the gear pulley 137. A bracket 146 is pivotally mounted on the rotation shaft 144 of the gear pulley 142 passing through the elongated hole 145 formed in the slide chassis 15 at an upper portion of the slide chassis 15, and the bracket 146 has an idle gear 147 that meshes with the gear pulley 142. A clutch member (not shown) is mounted between the idle gear 147 and the bracket 146 so as to be rotatable, and generates a rotating force about the rotating shaft 144 to the bracket 146.

Accordingly, when the capstan motor 136 is driven, the capstan gear 135 rotates, and the rotational force is transmitted to the idle gear 147 via the gear pulley 137, the endless belt 143, and the gear pulley 142. Here, when the transmitted torque is the clockwise rotation of the gear pulley 142 in FIG. 1, the bracket 146 is moved clockwise about the rotation shaft 144 in FIG. 1 by the clutch member described above. Then, the idle gear 147 is engaged with the gear portion 141 of the winding turntable 139 to rotate the winding turntable 139 via the idle gear 147 in the clockwise direction of the tape 1 in FIG. Can be. Conversely, when the transmitted torque is the counterclockwise torque of the gear pulley 142 in FIG.
6 is rotated counterclockwise about the rotation shaft 144 in FIG. 1, and the idle gear 147 is engaged with the gear portion 140 of the supply turntable 138, so that the supply turntable 138 is moved through the idle gear 147 in FIG. The tape 1 can be rotated in the counterclockwise rewind direction.

A guide roller 148 and a guide post 149 for guiding the tape 1 during tape loading are movably provided on the right side of the slide chassis 15 in FIG. That is, an intermediate portion between the two swing arms 150 and 151 is rotatably supported on the slide chassis 15 via the pivots 152 and 153.
Engagement pins 154, 155 protruding from one end of 0,151
Penetrates through the guide hole 156 and engages with guide grooves 157 and 158 formed in the base chassis 71, and a guide roller 148 and a guide post 149 are attached to the other end, respectively.

Therefore, when the slide chassis 15 moves rearward, that is, upward in FIG. 1, the movement of the engaging pins 154, 155 is restricted by the guide grooves 157, 158, and the swing arms 150, 151 respectively move in FIG. , Axis 152,
It rotates counterclockwise about 153. When the swing arms 150 and 151 rotate by a predetermined amount, the swing arms 15
The guide roller 148 and the guide post 149 provided at the other end of 0,151 move to a predetermined position along a predetermined trajectory.

1, a pinch roller 159 and a guide roller 160 are provided on the left side of the slide chassis 15 for guiding the tape 1 during loading and guiding the tape 1 between the capstan 134 and the capstan 134 when the tape 1 is running. Are movably provided. That is, a pinch arm 161 having a pinch roller 159 mounted on one end thereof is rotatably attached to the slide chassis 15 via a pivot 162. Similarly, the first guide pin 163 and the second guide pin 164 are provided.
Is also rotatably attached to the slide chassis 15 via the pivot 162. A tension spring 166 that pulls the arms 161 and 165 is stretched between the arms 161 and 165.
While the pinch arm 161 is urged counterclockwise in FIG. 1 around the center 62, the support arm 165 is urged clockwise. In addition, the first guide groove 167 and the second guide groove 1 which are formed in the slide chassis 15 and have an arc shape, respectively.
A first guide pin 163 and a second guide pin 164 projecting from the support arm 165 are engaged with the support arm 168. Between the support arm 165 and the slide chassis 15, a support arm in FIG. A tension spring 169 for urging the 165 in the left rotation direction is stretched.

On the other hand, on the base chassis 71, a regulating portion 170 for regulating the movement of the second guide pin 164 is formed. As described above, the operating lever 102 is rotatably attached to the base chassis 71 via the pivot 103 as described above.
1 is formed.

A guide arm 172 adjacent to the pinch arm 161 is rotatably attached to the slide chassis 15 via a pivot 173. The guide arm 172 is rotated by a torsion coil spring 174 mounted on the pivot 173 in FIG. , Counterclockwise.

Accordingly, when the slide chassis 15 moves rearward, 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 is moved.
And the pinch arm 161 rotates clockwise. When the support arm 165 rotates by a predetermined amount, the second guide pin 16
4 is disengaged from the restricting portion 170 and its movement restriction is released, and the two guide pins 163 and 164 are connected to the guide grooves 167 and 1 respectively.
The first guide pin 163 moves into the engagement groove 171 of the operation lever 102. At this time, as shown in FIG. 4, the second cam groove 90 of the cam gear 88 causes the operating lever 102 to rotate counterclockwise in FIG. 171 and 1st
The support arm 165 and the pinch arm 161 rotate clockwise via the 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 also rotates clockwise, but a detailed description of the mechanism will be omitted.

Here, various brake mechanisms provided on the winding turntable 139 side and the supply turntable 138 side will be described. As shown in FIG. 1, the direction in which the tape 1 is pulled out from the take-up reel 4 side during tape loading on the take-up turntable 139 side (in FIG. 1,
A ratchet brake 181 that regulates rotation of the take-up reel 4 in the counterclockwise direction is provided. That is, a ratchet 182 is formed on the outer peripheral portion of the winding turntable 139, while a ratchet brake lever 184 having a locking claw 183 that locks the ratchet 182 on the slide chassis 15 rotates via the pivot 185. Attached freely, a pivot 185 in FIG.
It is urged counterclockwise around the center.

An engagement pin 187 is fixed to the ratchet brake lever 184 so that the base chassis 71
An operation lever 188 adjacent to the ratchet brake lever 184 is rotatably pivotally connected via a pivot shaft 75, and the operation lever 188 is integrally formed with an engagement piece 189 capable of engaging with an engagement pin 187. Have been. Further, an operation pin 190 inserted into an operation groove 191 formed in the operation lever 102 is fixed to the operation lever 188, and the operation lever 102 pivotally attached to the base chassis 71 has
An engagement piece 192 that can directly engage with the engagement pin 187 of the ratchet brake lever 184 is integrally formed.

Therefore, the locking claw 183 of the ratchet brake lever 184 during tape loading is held in a state of being locked to the ratchet 182 of the winding turntable 139 by the previous tape loading operation or unloading operation. In addition, a problem that the tape 1 is pulled out from the take-up reel 4 is prevented beforehand. Here, in the case of a rewind operation or the like, the operation lever 102
Is rotated counterclockwise in FIG. 1 around the pivot 103,
Operation lever 1 through operation groove 191 and operation pin 190
88 rotates clockwise in FIG. Thereby, the engagement piece 189 pushes the engagement pin 187 to rotate the ratchet brake lever 184 counterclockwise in FIG. 1, so that the engagement with the ratchet 182 by the engagement claw 183 is released.
The take-up turntable 139 can rotate with the take-up reel 4 in the direction in which the tape 1 is pulled out.

After the loading is completed, the operation lever 10
1 is rotated counterclockwise in FIG. 1 around the pivot 103, the engaging piece 192 is engaged with the engaging pin 1 in the same manner as described above.
As a result, the ratchet brake lever 184 is rotated by pressing the lever 87, so that the restraint of the winding turntable 139 is released, and the winding reel 4 becomes rotatable in any direction.

On the other hand, as shown in FIG. 1, on the supply turntable 138 side, a soft brake 193 for restricting the rotation of the tape 1 in the feeding direction due to the inertia of the supply reel 3 at the time of tape loading, and a tape loading for tape loading. A ratchet brake 194 is provided for restricting the rotation of the supply turntable 138 in the direction in which the tape 1 is fed out upon completion. That is, a brake band 195 is wound around the outer periphery of the supply turntable 138, and one end of the brake band 195 is connected to the support member 196.
And the other end is connected to the swing arm 150. The soft brake lever 197 is rotatably attached to the slide chassis 15 via a pivot 198, and a pressure contact member 199 for pressing against the outer peripheral portion of the supply turntable 138 is attached to the tip of the soft brake lever 197. I have.

On the other hand, the ratchet brake lever 200 is also pivotally connected to the slide chassis 15 via the pivot 198 so as to be rotatable. The ratchet brake lever 200 is engaged with the gear 140 of the supply turntable 138 at the tip of the ratchet brake lever 200. The locking claw 201 is formed integrally. A tension spring 202 is stretched between the soft brake lever 197 and the ratchet brake lever 200,
Thereby, the soft brake lever 197 is urged in the clockwise direction in FIG. 1, that is, the direction in which the pressing member 199 is pressed against the outer peripheral portion of the supply turntable 138, and the ratchet brake lever 200 is turned in the counterclockwise direction in FIG. That is,
The locking claw 201 is connected to the gear portion 14 of the supply turntable 138.
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.
03,204 is fixed. On the other hand, the drive arm 91
The cam gear 205 has a cam surface 205 as a control unit for controlling the operation of the levers 197 and 200, and the cam gear 88 has a cam groove 206 for controlling the operation of the ratchet brake lever 200.
Are formed.

Therefore, when the tape 1 is loaded, the soft brake lever 197 is urged clockwise in FIG. 1 by the spring force of the tension spring 202, so that the pressing member 199 presses against the supply turntable 138 and the supply reel 138 is pressed. The rotation of the tape 1 in the feeding direction due to the inertial force of No. 3 is prevented. When the cam surface 205 of the drive arm 91 comes into contact with the cam pin 204, the ratchet brake lever 200 is held at that position. The rotation of the supply reel 4 is not hindered.

When tape loading is performed by moving the slide chassis 15 rearward from this state, the drive arm 91 rotates counterclockwise in FIG. 1, and the cam pin 203 which contacts the cam surface 205 of the drive arm 91 is moved. As a result, the soft brake lever 197 rotates counterclockwise against the urging force of the extension spring 202. Thereby, the pressing member 199 is formed.
Press contact with the supply turntable 138 is released,
The rotation restriction of the supply reel 3 is released. On the other hand, with this operation, the cam pin 2 by the cam surface 205 of the drive arm 91 is moved.
04 is released and the ratchet brake lever 18
Reference numeral 4 denotes a locking claw 201 by the urging force of a tension spring 202.
Is locked to the gear portion 140 of the take-up turntable 139, so that the rotation of the supply reel 3 in the direction in which the tape 1 is fed out when the tape loading is completed is prevented. Further, when the cam gear 88 is further rotated after the tape loading is completed, the ratchet brake lever 184 is rotated by the cam groove 204 via the cam pin 204, and the gear portion 140 is rotated.
Is released from the locking claw 201 with respect to the supply reel 3
Is in a free rotation state.

The eject position of the slide chassis 15 shown in FIGS. 1 and 4 is in the unloading state of the tape 1. From this state, the slide chassis 15 is moved and the tape 1 is pulled out for loading. 2 and the loading state of the tape 1 shown in FIG.

That is, as shown in FIGS. 2 and 5, the cam gear 88 rotates with the driving of the driving motor 81, and the driving force is transmitted to the first driving gear 109 and the second driving gear 110, Sector gear 114 and second sector gear 1
5, the first sector gear 114 rotates counterclockwise in FIG. 5, while the second sector gear 115 rotates clockwise. Accordingly, as shown in FIG. 7, the first loading slider 118 moves along the loading guide groove 116, while the second loading slider 127 moves along the loading guide groove 117.

At this time, the first loading slider 118
The direction is changed at one end of the loading guide groove 116. That is, as shown in FIG. 8, while the groove engaging pins 119 and 120 of the first loading slider 118 are guided by the loading guide grooves 116, the
26 moves while being guided by the template 125.
When the first loading slider 118 moves to one end of the loading guide groove 116, the copying pin 1
Since the groove 26 is restrained by the template 125, the groove engaging pins 119 and 120 are divided and moved to one end 116a of the loading guide groove 116 and the branch groove 116b, and the direction of the first loading slider 118 is about 90 degrees. be changed.

Thus, the tape 1 in the cassette case 2 is transferred to the guide roller 12 of the first loading slider 118.
1 and guide posts 122 and 123 and guide rollers 130 and guide posts 131 of the second loading slider 127
And wound around the outer peripheral surface of the rotating drum 112.

The tape 1 is loaded with a plurality of guide rollers 14 arranged on both sides of the rotary drum 112 simultaneously with the loading operation by the two loading sliders 118 and 127.
8, 160, a loading operation by the guide post 149 and the guide pin 164 is also performed. That is, as shown in FIGS. 1 and 2, when the slide chassis 15 moves backward, the pins 154 and 155 of the swing arms 150 and 151 move while being guided by the guide grooves 157 and 158, and move. 151 rotate. As a result, the guide roller 148 and the guide post 149 of the swing arms 150 and 151 move, and the tape 1 is pulled out.

On the other hand, as the slide chassis 15 moves backward, 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. 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 pair of guide pins 163, 164 move along the guide grooves 167, 168, and the first guide pin 163 is moved.
Fits into the engagement groove 171 of the operation lever 102. In this way, the pinch roller 159 moves to pull out the tape 1. When the pinch roller 159 moves, the guide arm 172 rotates and the guide roller 160 guides the movement of the tape 1.

When the tape 1 is loaded, the supply reel 3 and the take-up reel 4 of the cassette case 2
Are operated by various brakes 181, 193 and 194.

That is, as shown in FIG. 1, when the tape 1 is loaded, the locking claw 183 of the ratchet brake lever 184 on the take-up reel 4 is turned by the previous loading operation or unloading operation. Of the take-up reel 4 during tape loading.
The tape 1 is prevented from being pulled out from the side. Therefore,
At the time of tape loading, the tape 1 is not pulled out from the take-up reel 4, and it is possible to prevent a problem such as re-recording on the recorded tape 1 wound on the take-up reel 4.

However, if the tape loading is performed in a state where the tape 1 in the cassette case 2 inserted into the cassette holder 11 is all wound on the take-up reel 4, the tape 1 is cut off, so that it is not shown. The detector detects the remaining amount of the tape 1 wound on the supply reel 3. If there is no remaining amount of the tape 1 wound on the supply reel 3,
The operating lever 102 is rotated counterclockwise about the pivot 103 from the state shown in FIG.
88 is rotated clockwise, and the engagement piece 189 pushes the engagement pin 187 to rotate the ratchet brake lever 184 counterclockwise, thereby releasing the engagement of the ratchet 182 by the engagement claw 183 and the winding turn. The table 139 is switched to the free rotation state.

At the time of tape loading, as shown in FIG.
9 is pressed against the supply turntable 138 by the spring force of the tension spring 202, thereby preventing the supply reel 3 from rotating by feeding out the tape 1 due to the inertial force of the supply reel 3. Then, when the tape loading is completed, as shown in FIG.
03, the soft brake lever 197 is turned,
By releasing the pressing of the pressing member 199 against the supply turntable 138, the supply reel 3 is maintained in a free rotation state.

During tape loading, on the other hand, as shown in FIGS.
Since the cam surface 205 of the drive arm 91 contacts the cam pin 204 of the drive arm 91, the locking claw 201
, The supply reel 4 is in a free rotation state. And when tape loading is completed,
As shown in FIG. 2, the holding of the cam pin 204 by the cam surface 205 of the drive arm 91 is released, and the locking claw 183 of the ratchet brake lever 184 is locked to the gear portion 140 of the winding turntable 139 by the tension spring 202. Therefore, the supply reel 3 is prevented from rotating in the feeding direction of the tape 1.

As described above, the tape 1 is
21,130,148,160 and guide posts 122,12
3, 131, 149, and the pinch roller 159, are pulled out of the cassette case 2 and are loaded on a predetermined locus. The tape loading shown in FIGS. 2 and 5 is in the stop mode.

As shown in FIG. 3, the running locus of the tape 1 during recording / reproduction is such that the tape 1 pulled out from the cassette case 2 includes the guide roller 148 and the guide post 149, the impedance roller 133, and the guide roller 13.
0, slidingly in contact with the outer peripheral surface of the rotary drum 112 via the guide post 131, the guide posts 122 and 123, the guide roller 121, the capstan 134 (pinch roller 159),
After passing through the guide roller 160, it enters the cassette case 2 again.

[0085]

According to the tape deck and the method of assembling the tape deck of the present invention, the loading gears are provided with the loading sliders mounted on the loading guide grooves, and the sector gears connected to the loading sliders via links are rotatable. Since the ring holder attached to the and the drum base on which the rotating drum is rotatably mounted are combined, and the ring holder and the drum base are fixed to the base chassis,
As a result of the unitization of the parts, the degree of integration of these parts can be improved and the tape deck can be made smaller.

Further, since the loading guide groove is formed so as to straddle the ring holder and the drum base, the work of mounting the loading slider on the loading guide groove is extremely easy, and the parts for each unit can be assembled. Together with this, the workability of these assembling operations can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a slide chassis showing an ejected state in a tape deck provided with a drive mechanism for a reel brake 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 eject state of the tape deck.

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 drum.

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

FIG. 18 is a plan view illustrating a tape loading mechanism of a conventional tape deck.

[Explanation of symbols]

 1: Tape 71: Base chassis 109: Drive gear 110: Drive gear 111: Drum base 112: Rotating drum 113: Ring holder 114: Sector gear 115: Sector gear 116: Loading guide groove 117: Loading guide groove 118: Loading slider 122: Guide Post 123: Guide post 124: Link 127: Loading slider 131: Guide post 132: Link

Claims (2)

(57) [Claims] 1. A drum base on which a rotating drum is rotatably mounted, a ring holder removably assembled to the drum base, and removably fixed together with the drum base to the base chassis. A pair of loading guide grooves formed straddling the holder and the drum base and facing each other across the rotary drum, slidably engaging along the loading guide grooves, and winding a tape around the rotary drum; And a pair of loading sliders, each of which is connected to the loading slider via a link, and rotatably attached to the ring holder along the outer peripheral edge of the rotary drum. A sector gear, the sector gear rotatably mounted on the ring holder and the sector gear; A tape deck comprising a pair of drive gears that mesh with gears and rotate the sector gears in opposite directions. 2. A rotary drum mounting step of rotatably mounting a rotary drum on a drum base, and a loading guide groove formed in a ring holder with a loading slider provided with a guide post for winding a tape around the rotary drum. Mounting a sector gear to the ring holder rotatably, a link connecting step of connecting the sector gear and the loading slider via a link, and a pair of drive gears meshing with the sector gear. A drive gear mounting step for rotatably attaching the drum base to the ring holder, a rotating drum mounting step, a loading slider mounting step, a sector gear mounting step, a link connecting step, and a drive gear mounting step. And a drum base / ring holder assembling step, and a step of fixing the drum base and the ring holder to the base chassis after the drum base / ring holder assembling step.