JP3344082B2 - Tape drive - 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 drive for recording and reproducing information signals on a recording tape such as a magnetic tape.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a tape recorder device having a rotary head device, in which a magnetic head of the rotary head device records and reproduces information signals on and from a magnetic tape as a recording tape. Have been.

The applicant of the present application has previously used a magnetic tape which is wound around a pair of tape reels housed in a cassette to form a tape cassette, and uses a part of the rotary head device as the magnetic tape. There has been proposed a tape recorder device in which the magnetic head of the rotary head device is slid into contact with the magnetic tape by entering a cassette.

In the tape drive of the tape recorder, the tape cassette is mounted at a predetermined mounting position. In the tape cassette mounted at the mounting position, a pair of reel shafts are inserted and engaged with the respective tape reels. By rotating these reel shafts, the magnetic tape is unwound from one tape reel (supply reel) and wound around the other tape reel (take-up reel) in the cassette. Operated.

The cassette has an open front side, and a portion of the magnetic tape extending between the tape reels faces outward. In this cassette, a part of the rotary head device can enter from the open front side. This tape cassette has a pinch roller at a position near the front side of the cassette and behind the magnetic tape. The pinch roller is formed in a cylindrical shape from a material having a high coefficient of friction such as butyl rubber, and is rotatably supported with its outer peripheral surface substantially abutting against the back surface of the magnetic tape.

The rotary head device includes a fixed drum formed substantially in a cylindrical shape, and a rotary drum coaxial with the fixed drum, rotatably supported by the fixed drum, and having the magnetic head mounted thereon. It is configured to have. The rotating head device slides the running magnetic tape into contact with the outer peripheral surface portions of the fixed drum and the rotating drum by entering the cassette, and further rotates the rotating drum to form the magnetic head. Is slid in contact with the magnetic tape at a high speed, and information signals are written to and read from the magnetic tape by a so-called helical scan method.

When a part of the rotary head device enters the tape cassette, the rotary head device is supported and positioned by the tape cassette. That is, the rotary head device is positioned using the cassette as a position reference.

[0008] A capstan shaft is attached to the rotary head device. The capstan shaft is rotatably attached to the distal end of a capstan support arm whose base end is rotatably supported by the fixed drum. When the capstan support arm is rotated with respect to the fixed drum and moved to the pinch roller side, the capstan shaft cooperates with the pinch roller to pinch the magnetic tape, and The magnetic tape is rotated at a constant speed by a rotation driving device such as the above, and the magnetic tape is caused to run at a constant speed.

In this tape drive device, the rotation of the reel shaft and the capstan shaft is performed by using a drum drive motor built in the rotary head device for rotating the rotary drum as a drive source. Is done. That is, the rotary head device has a drive gear attached to a drive shaft of the drum drive motor together with the rotary drum. The drive gear is provided so as to protrude downward from the rotary head device. The rotational driving force of the driving gear is transmitted to the reel shaft and the capstan shaft via a gear train including a plurality of driven gears disposed on a gear plate.

The position of the gear plate is adjusted with respect to the rotary head device such that the first driven gear meshing with the drive gear is located at a predetermined distance (gear pitch) from the drive gear. Then, it is fixed to the rotary head device.

[0011]

By the way, in the above-mentioned tape drive device, the positioning of the gear plate with respect to the rotary head device is performed by rotating the gear plate around the center axis of rotation and the drive gear and the second gear. The operation is performed such that a predetermined distance is established between the first driven gear and the driven gear.
The rotation center axis of the gear plate is provided on a jig holding the gear plate.

For this reason, the jig for assembling the above-described tape driving device has a complicated structure and a large size, and the assembling process is complicated.

The height position of the gear plate, that is, the distance between the gear plate and the rotary head device is defined by a positioning pin implanted on the gear plate.

Therefore, the size of the gear plate is increased in order to secure a portion where the positioning pin is to be implanted on the gear plate, the number of parts increases due to the addition of the positioning pin to the component, and the positioning pin is implanted. This increases the number of assembling steps due to the additional steps.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and is intended to reduce the size of the apparatus configuration and the number of parts, and to simplify and reduce the size of the assembling jig. It is an object of the present invention to provide a tape drive device which can realize the simplification of the above.

[0016]

In order to solve the above-mentioned problems and achieve the above-mentioned object, a tape drive according to the present invention comprises:
A drive gear provided on the drive source support plate, a first driven gear rotatably provided on the gear plate and meshed with the drive gear, and a support shaft protruded on the gear plate. A second driven gear rotatably supported on the base end side and transmitting rotational driving force from the first gear, wherein a distal end side of the support shaft is rotatable with respect to the drive source support plate. Supported,
The rotation of the gear plate around the support shaft is enabled, and the distance of the first driven gear to the drive gear is adjustable.

Further, according to the present invention, in the above-mentioned tape drive device, the front end side of the spindle has a stepped portion whose tip end side is reduced in diameter, and this stepped portion allows the spindle to be driven with respect to the drive source support plate. Is determined in the axial direction.

Further, according to the present invention, in each of the tape drive devices described above, the drive gear is attached to a drive shaft of a drum drive motor of a rotary head device provided on the drive source support plate. It was done.

According to the present invention, in the tape drive device, the drive source support plate is disposed so as to be movable on a chassis, and the rotary head device is moved and operated together with the drive source support plate. The positioning is performed by a tape cassette mounted on the chassis.

[0020]

In the tape drive device according to the present invention, the distal end of the support shaft protruding from the gear plate and rotatably supporting the second driven gear at the base end is rotated with respect to the drive source support plate. A first driven gear rotatably mounted on the gear plate and rotatably mounted on the gear plate, the first driven gear being rotatably mounted on the drive source support plate. Since the distance to the provided drive gear is adjustable, the positioning of the gear plate is easy without providing a rotation center shaft on a jig holding the gear plate,
And it can be performed accurately.

Further, in the above-mentioned tape drive device, the distal end side of the support shaft has a step portion whose diameter is reduced at the distal end side,
In the case where the positioning of the support shaft with respect to the drive source support plate in the axial direction is performed by the step portion, the positioning of the height position of the gear plate can also be performed by the support shaft.

Further, in each of the tape drive devices described above, when the drive gear is mounted on a drive shaft of a drum drive motor of a rotary head device disposed on the drive source support plate, Each of the driven gears can be rotated by the drum drive motor.

In the tape drive device, the drive source support plate is disposed so as to be movable on the chassis, and the rotary head device is moved and operated together with the drive source support plate, so that the rotary head device is mounted on the chassis. If the positioning is to be performed by the mounted tape cassette, the gear plate is moved together with the drive source support plate while maintaining its position with respect to the drive source support plate.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the tape drive device according to the present invention is a device in which a rotary head device 25 writes and reads information signals on a magnetic tape 108 serving as a recording tape in a tape recorder device.

As shown in FIGS. 1 and 12, the magnetic tape 108 used in this tape drive is
A pair of tape reels 10 stored in the cassette 103
The tape cassette is wound around 6,107. Then, the tape drive device moves a part of the rotary head device 25 into the cassette 103 as shown by an arrow U in FIG. 1 and slides the magnetic head of the rotary head device 25 on the magnetic tape 108. The information signal is written to and read from the magnetic tape.

As shown in FIG. 12, the tape cassette has a cassette 103 formed by joining upper and lower halves 101 and 102 to each other. The cassette 103 is formed in a thin housing shape with an open front side. In the cassette 103, a pair of tape reels 106 and 107 are rotatably accommodated in parallel.
One of these tape reels 106 and 107,
The magnetic tape 108 is wound around the supply reel 107. The start end of the magnetic tape 108 is joined to the other tape reel, that is, the take-up reel 106. A portion of the magnetic tape 108 extending from the supply reel 107 to the take-up reel 106 faces outward through the open front side of the cassette 103.

The open front side of the cassette 103 can be opened and closed by a lid 118. The lid 118 is formed in a substantially flat plate shape so as to close the front side of the cassette 103, and is inserted into a pair of support holes 119, 119 formed at both ends.
A pair of support shafts 12 protruding from both sides of the front part 1
The cassette 103 is attached to the front side of the cassette 103 by fitting 0 and 120 correspondingly. The lid 118 is rotatable up and down around the support shafts 120 and 120 as shown by an arrow N in FIG. Open and close.

Reel hubs 109 and 110 are fitted to the center portions of the tape reels 106 and 107, respectively. Each of the reel hubs 109 and 110 is formed in a cylindrical shape, and has an inner hole formed in the reel shaft engaging holes 121 and 12.
1 has been set. Each of the halves 101 and 102 of the cassette 103 has a reel shaft insertion hole 11 respectively.
4,115 have been established. These reel shaft insertion holes 1
Reference numerals 14 and 115 denote through holes for communicating the inside of the cassette 103 with the outside, respectively.
The reel shaft engaging holes 121 are opened at positions corresponding to the upper and lower sides, respectively.

In the cassette 103, a pair of slip sheets 11 for facilitating the rotation of the tape reels 106 and 107 in the cassette 103 is provided.
1, 111 are arranged above and below the tape reels 106, 107, respectively.

The cassette 103 is configured such that a part of the rotary head device 25 can enter from the open front side. In the cassette 103, a pair of rotary head receiving members 116 and 117 are disposed near the center of the open front side portion. The rotary head receiving members 116 and 117 cooperate with each other, form a part of a cylindrical surface corresponding to the outer peripheral surface of the rotary head device 25, and are immersed rearward from the front portion of the cassette 103. Is formed.

Further, these rotary head receiving members 116,
The portion 117 on the side of the cassette 103 serves as wing guide receiving portions 122 and 123. The wing guide receiving portions 122 and 123
As will be described later, a pair of wing guides attached to the rotary head device 25 are brought into contact with each other to position the rotary head device 25.

In the cassette 103, a position near the front side and behind the magnetic tape 108 and on both sides of the rotary head receivers 116 and 117 is provided.
A pair of pinch rollers 104 and 105 for F (forward) and R (reverse) are disposed so as to be divided into right and left. These F and R pinch rollers 104, 1
Reference numeral 05 denotes a cylindrical member made of a material having a high coefficient of friction, such as butyl rubber, and is rotatably supported with its outer peripheral surface substantially in contact with the back surface of the magnetic tape 108.

As shown in FIG. 1, the tape driving device has a pair of reel shafts 19 and 23 on the T (take up) side and the S (supply) side. The reel shafts 19 and 23 are rotatably supported on a chassis (not shown) constituting the tape drive. When the tape cassette is mounted at the mounting position on the chassis, these reel shafts 19 and 23 are inserted in correspondence with the respective reel insertion holes 114 and 115, enter the cassette 103, and Tape reel 10
6, 107 are inserted and engaged with the reel hubs 109, 110.

As described above, each of the reel hubs 109, 11
When the reel shafts 19 and 23 inserted into and engaged with 0 rotate, the respective tape reels 106 and 107 rotate. First and second reel shaft gears 18 and 33 are coaxially mounted on the base end of the T-side reel shaft 19. The first reel shaft gear 18 has a larger diameter than the second reel shaft gear 33. A third reel shaft gear 22 is provided at the base end portion of the S-side reel shaft 23.
3 is mounted coaxially.

A fourth reel shaft gear 32 meshed with the second reel shaft gear 18 is rotatably mounted on the base end side of the T-side reel shaft 19 via a T-side gear support arm (not shown). Have been. This fourth reel shaft gear 32
Since the rotation axis of the T-side gear support arm is located on the center axis of the T-side reel shaft 19, the second reel shaft gear 18 always remains in the position even when the T-side gear support arm rotates. Is engaged. Also, on the base end side of the S-side reel shaft 23,
A fifth reel shaft gear 21 meshed with the third reel shaft gear 22 is rotatably mounted via an S-side gear support arm (not shown). Since the rotation axis of the S-side gear support arm is on the center axis of the S-side reel shaft 23, even if the S-side gear support arm rotates, the fifth reel shaft gear 21 always The third reel shaft gear 22 meshes with the third reel shaft gear 22.

A cassette holder 65 is disposed above the reel shafts 19 and 23. The cassette holder 65 is configured such that the tape cassette is an arrow K in FIG.
As shown in the figure, the tape cassette is inserted in a predetermined approaching direction with the lid 118 being on the front side, and is configured in a substantially housing shape so as to be able to hold the tape cassette. The cassette holder 65 is open at the rear side where the tape cassette is inserted and at the front side where the front side of the tape cassette held by the cassette holder 65 faces. Also, the cassette holder 65 is open on the lower surface side so that the lower surface portion of the inserted tape cassette faces outward on the lower side. The cassette holder 65 has a front portion rotatably supported by the chassis, and is rotatable in a direction in which the cassette holder 65 comes into contact with and separates from the chassis.

The cassette holder 65 is rotated so as to be separated from the chassis, the tape cassette is inserted from the rear side, and after holding the tape cassette, as shown by an arrow L in FIG. When rotated to the chassis side, each of the reel shafts 19 and 23 holds the tape cassette held therein by the respective reel shaft engaging holes 121 and 12.
Attachment is made to the mounting position where it is inserted and engaged corresponding to 1. The cassette holder 65 is configured to open the lid 118 when the tape cassette is inserted. That is, the cassette holder 6
Reference numeral 5 has a lid guide portion (not shown) on the inner side of the front side portion, which contacts the lid 118 of the tape cassette to be inserted and rotates the lid 118 with the insertion operation of the tape cassette. .

The tape cassette held in the cassette holder 65 and mounted at the mounting position is inserted into and engaged with the reel shafts 19 and 23 in the reel shaft engaging holes 121 and 121, respectively. The lid 118 is opened, and a portion of the magnetic tape 108 extending between the tape reels 106 and 107 faces forward.

As shown in FIGS. 2 to 5, the tape drive device includes a head plate 83 serving as a drive source support plate for supporting the rotary head 25 and a gear plate 1 attached to the head plate 83. Have.

The head plate 83 is formed in a flat plate shape, and is disposed on the chassis at a position in front of the cassette holder 65. This head plate 83
The slide operation can be performed in the front-rear direction in which the cassette holder 65 comes in contact with and separates from the cassette holder 65.

The rotary head device 25 disposed on the head plate 83 is, as shown in FIGS.
The upper fixed drum 26 and the lower fixed drum 63 are formed in a substantially cylindrical shape, are coaxial with each other, and are fixed to the head plate 83. Between these fixed drums 26 and 63, these fixed drums 2
A rotating drum 27, which is coaxial with and rotatably supported by 6, 63, is provided. A magnetic head 64 is attached to the rotating drum 27. The rotating drum 27 is rotated by a drum driving motor (not shown) housed in the lower fixed drum 63.

The magnetic head 64 has a magnetic gap facing the outer peripheral surface of the rotary drum 27. The fixed drums 26 and 63 and the rotating drum 27 are attached to the head plate 83 at a predetermined minute angle.

In the rotary head device 25, when the tape cassette is mounted at the mounting position, the head plate 83 is advanced toward the cassette holder 65 as shown by an arrow U in FIG. Then, it enters the cassette 103 from the front side. The rotary head device 25 that has entered the cassette 103 is
The magnetic tape 108 facing the front surface side of the magnetic head 64 is brought into sliding contact with the outer peripheral surfaces of the fixed drums 26 and 63 and the rotating drum 27, and the rotating drum 27 is further rotated. The tape is brought into sliding contact with the tape at high speed. That is, this rotary head device 25
The magnetic head 64 is configured to write and read information signals to and from the magnetic tape 108 by a so-called helical scan method.

The transmission and reception of information signals to and from the magnetic head 64 of the rotary head device 25 are performed by a flexible substrate 34 connected to the upper fixed drum 26 and between the upper fixed drum 26 and the rotary drum 27. This is performed via a provided rotary transformer (not shown).

The rotary head device 25 is connected to a pair of F and R capstan shafts 7 and 14 via a pair of F (forward) and R (reverse) capstan support arms 28 and 29. Is attached. Each of the capstan support arms 28, 29 has a base end on the upper fixed drum 26 via a support shaft 61, 62.
It is rotatably attached to the upper surface of the. These capstan support arms 28 and 29 are arranged so as to protrude in both side directions of the rotary head device 25. Each of the capstan shafts 7 and 14 is formed in a columnar shape, and has an upper end side on each of the capstan support arms 28 and 29.
And is rotatably supported and suspended. At the lower ends of the capstan shafts 7, 14, a capstan gear 6 for F and a capstan gear 13 for R for rotating the capstan shafts 7, 14 are mounted in a corresponding manner.

Each of the capstan shafts 7 and 14 is rotatable around the support shafts 61 and 62 on the base end side of each of the capstan support arms 28 and 29 with respect to the rotary head device 25. Each capstan support arm 28,
29 is rotatable around an axis. These capstan shafts 7, 14 are opposed to the pinch rollers 104, 105 of the tape cassette when the tape cassette is mounted at a predetermined position.

Then, each of the capstan support arms 2
8 and 29 include these capstan support arms 28 and 2.
An anti-winding plate 80 is integrally attached to 9. The anti-winding plate 80 is formed in a substantially flat plate shape, and the upper end side is provided with each of the capstan support arms 28, 29.
And is hung down from the lower surface.

A pair of wing guides 30 and 31 are attached to the rotary head device 25. The wing guides 30 and 31 are supported by the fixed drums 26 and 63 of the rotary head device 25 via support members on both front sides facing the cassette holder 65 via support members. These wing guides 30,
Reference numeral 31 denotes a substantially cylindrical shape whose front end facing the cassette holder 65 has an axis substantially parallel to the central axis of the rotary drum 27.

The wing guides 30, 31 are provided when the tape cassette is mounted at a predetermined position and the head plate 83 is moved forward toward the tape cassette.
The wing guide contacts the wing guide receiving portions 122 and 123.
The wing guides 30 and 31 contact the wing guide receiving portions 122 and 123 to position the rotary head device 25 with respect to the cassette 103 and to guide the traveling path of the magnetic tape 108.

Then, on the gear plate 1, FIG.
As shown in FIG. 5, a plurality of transmission gears for transmitting the rotation of the drum drive motor to the capstan shafts 7 and 14 and the pair of reel shafts 19 and 23 are rotatably arranged. I have. Each of these transmission gears is rotatably supported by a support shaft implanted in the gear plate 1. These transmission gears maintain their relative positions in a predetermined positional relationship on the gear plate 1 because the respective support shafts are implanted at predetermined positions.

A drive gear 2 is mounted on the drive shaft of the drum drive motor. The drive shaft to which the drive gear 2 is attached projects below the rotary drum device 25. The drive gear 2 is located below the rotary drum device 25. As shown by an arrow A in FIG.
Is rotated in the forward direction.

The drive gear 2 meshes with a first transmission gear 3 which is a first driven gear rotatably disposed on the gear plate 1. The position of the first transmission gear 3 with respect to the drive gear 2 is determined by the position of the gear plate 1 with respect to the head plate 83. That is, by positioning the gear plate 1 with reference to the head plate 83, the first transmission gear 3 meshes with the drive gear 2 in a good state.

The first transmission gear 3 has second and third transmission gears.
Are integrally formed coaxially with each other. The second transmission gear 4 meshes with the F capstan gear 6.

The second transmission gear 4 is coaxial with the support shaft 61 of the F capstan support arm 28. Even if the F capstan support arm 28 rotates, the second transmission gear 4 is always in the same position. It meshes with the F capstan gear 6.

The third transmission gear 5 meshes with a fourth transmission gear 8 rotatably disposed on the gear plate 1. The fourth transmission gear 8 meshes with a fifth transmission gear 9 rotatably disposed on the gear plate 1. The fifth transmission gear 9 is a gear in which a large-diameter gear portion and a small-diameter gear portion are integrally formed coaxially, and the small-diameter gear portion is meshed with the fourth transmission gear 8. .
The large-diameter gear portion of the fifth transmission gear 9 meshes with a sixth transmission gear 12 rotatably disposed on the gear plate 1. The sixth transmission gear 12 is a gear in which a large-diameter gear portion and a small-diameter gear portion are integrally formed coaxially. The large-diameter gear portion meshes with the fifth transmission gear 9. I have. The small-diameter gear portion of the sixth transmission gear 12 has the R
With the capstan gear 13.

The sixth transmission gear 12 is coaxial with the support shaft 62 of the R capstan support arm 29. Even when the R capstan support arm 29 rotates, the sixth transmission gear 12 always moves. It is in mesh with the R capstan gear 13.

The fourth transmission gear 8 serves as a second driven gear rotatably disposed on the front end side of the gear plate 1 on the cassette holder 65 side.
Of the transmission gear 15. This seventh transmission gear 1
5 is rotatably supported on the base end side of the support shaft 84 implanted in the gear plate 1. The support shaft 84 has a tip end projecting upward, that is, toward the head plate 83 side.

The seventh transmission gear 15 meshes with an eighth transmission gear 20 that is rotatably disposed alongside the seventh transmission gear 15 at the front end portion of the gear plate 1.

As shown in FIGS. 4 and 5, the gear plate 1 is positioned and attached to the head plate 83 by the tip end of the support shaft 84 and a pair of height regulating pins 94, 94. Have been. The support shaft 84
Are implanted at a front side portion of the head plate 1, that is, at a position on the cassette holder 65 side.
Each of the height regulating pins 94, 94 is connected to the gear plate 1 described above.
It is located on the left and right sides of the rear side of the camera, and protrudes upward.

As shown in FIGS. 6 and 7, the support shaft 84 has a reduced-diameter portion 95 formed on the tip end side via a step 97. A male screw portion 96 is formed in the reduced diameter portion 95. As shown in FIGS. 5 to 7, the support shaft 84 is inserted from below into a through hole 87 formed in the head plate 83, and a U formed at a front edge portion of the through hole 87. The reduced diameter portion 95 is fitted and engaged with the groove-shaped engagement concave portion 86. The engagement recess 86 is provided with the reduced diameter portion 9.
5 is formed with a width corresponding to the diameter. The reduced diameter portion 95 has an upper end protruding above the upper surface of the head plate 83. The step 97
Is in contact with the lower surface of the head plate 83.

The support shaft 84 is connected to the head plate 83.
The nut 85 is screwed into the male screw portion 96 of the reduced diameter portion 95 protruding upward from the upper surface of the head plate 83 to be fixed to the head plate 83. That is, the step portion 97 and the nut 85 are connected to the head plate 8.
The support shaft 84 is attached to the head plate 83 by sandwiching the peripheral portion of the engagement recess 86 of the third.

The height regulating pins 94, 94 are in contact with the lower surface of the head plate 83 to maintain the distance between the gear plate 1 and the head plate 83 at a predetermined constant distance.

Adjustment of the position of the gear plate 1 with respect to the head plate 83 when the gear plate 1 is attached to the head plate 83 is performed with the nut 85 loosened as shown by an arrow V in FIGS. This is performed by rotating the gear plate 1 about a support shaft 84 in which the reduced diameter portion 95 is fitted and engaged with the engagement concave portion 86. Such rotation of the gear plate 1 can be performed using a simple jig holding the gear plate 1. At this time, the distance between the gear plate 1 and the head plate 83 is maintained at a predetermined constant distance by the step portion 97 and the height regulating pins 94, 94.

When the gear plate 1 is positioned at a predetermined position with respect to the head plate 83,
The distance (gear pitch) of the first transmission gear 3 with respect to the drive gear 2 is a predetermined distance.
When the nut 85 is tightened in a state where the meshing state of the gear plate 2 is good, the gear plate 1 is attached to the head plate 83 while being positioned with respect to the head plate 83.

In this tape drive device, when the drum drive motor is driven, the F capstan shaft 7 moves the magnetic tape 108 in the forward direction (forward direction) as shown by the arrow F in FIG. The rotation operation has been performed in the sending direction. When the drum drive motor is driven, the R capstan shaft 14 is
As shown by the middle arrow J, the magnetic tape 108 is rotated in the direction of feeding the magnetic tape 108 in the reverse direction (reverse direction). Further, when the drum drive motor is driving,
The seventh and eighth transmission gears 15 and 20 are rotated.

As shown in FIG. 10, a pair of link arms 68 and 70 on the F (forward) side and the R (reverse) side are rotatably mounted on the head plate 83. The F-side linking arm 68 is rotatably attached to the head plate 83 at a halfway portion by a support shaft 69, and has one end protruding toward the cassette holder 65 and extending, and the other end being the F The capstan support arm 28 is linked to the capstan support arm 28. That is, a linking pin 72 protrudes from the other end of the F-side linking arm 68, and this linking pin 72 is
And is fitted and engaged in a long hole 74 formed in the hole.

The R-side linking arm 70 is rotatably attached to the head plate 83 at a middle part by a support shaft 71, and has one end projecting toward the cassette holder 65 and extending therefrom. The end is linked to the R capstan support arm 29. That is, a linking pin 73 is protruded from the other end of the R-side linking arm 70,
This link pin 73 is used for the R capstan support arm 2.
9 is fitted and engaged with a long hole 75 formed in the hole 9.

A tension coil spring 67 is stretched between one ends of the link arms 68 and 70. The tension coil spring 67 urges the link arms 68 and 70 to rotate in such a direction that one end sides thereof approach each other.

The FR slider 48, the first and second FR gears 16 and 17, and the FF-
A Rew (fast-forward rewind) slider, a head moving arm 35, and a cam gear for moving these in accordance with the selected mode are provided.

The cam gear is rotatably disposed on the chassis, and is rotated by a motor (not shown). This cam gear has first and second cam grooves on a main surface portion, and moves the head moving arm 35 with the first cam groove, and moves the FR with the second cam groove.
By moving the slider 48 and the FF-Rew slider, a stop (Stop) mode, a fast-forward (FF) mode, a rewind (Rew) mode, and a pause (Pause) are performed.
Mode, a forward recording (reproduction) (Forward) mode, and a reverse recording (reproduction) (Reverse) mode.

The FR slider 48 is supported on the chassis so as to be slidable in a lateral direction extending between the reel shafts 19 and 23. The FR slider 48 has a copying pin 47 at one end, and the copying pin 47 is fitted and engaged with the second cam groove. The FR slider 48 is operated to move in one direction or another direction by the cam gear in the recording mode and the reproduction mode according to the running direction of the magnetic tape 108. The FR slider 48 has a protrusion 66, and the protrusion 66 is interposed between one ends of the link arms 68 and 70. That is, the protrusion 66 is held between the respective one ends of the link arms 68 and 70.

Further, an FR gear arm that rotatably supports the FR gears 16 and 17 is engaged with the FR slider 48. These FR gears 16, 17
Are large-diameter and small-diameter gears integrally formed coaxially and rotatably attached to one end of the FR gear arm. The FR gear arm is rotatably supported at an intermediate portion at a position between the reel shafts 19 and 23 on the chassis. The other end of the FR gear arm is engaged with the FR slider 48.
The rotation operation is performed in conjunction with the slide of the slider 48.

The FF-Rew slider is supported slidably in the lateral direction with respect to the chassis. The FF-Rew slider has a copying pin on one end side, and the copying pin is fitted and engaged with the second cam groove. The FF-Rew slider is operated to move in one direction or the other direction by the cam gear in the fast-forward mode and the rewind mode. The FF-Rew slider has a protrusion and an R on the T-side gear support arm.
It has projections respectively corresponding to the projections of the side gear support arm. The FF-Rew slider selectively slides the T-side gear support arm or the R-side gear support arm by being slid in one direction or the other.

The head moving arm 35 is rotatably supported at an intermediate portion with respect to the chassis. The head moving arm 35 is configured such that an engagement pin provided on one end side is fitted into and engaged with an engagement hole of the head plate 83, and a transmission pin protruded from one end side of the transmission arm in an engagement recess provided on the other end side. Are fitted and engaged. The transmission arm has a halfway portion rotatably supported with respect to the chassis, and a copying pin provided on the other end side is fitted and engaged with the first cam groove of the cam gear. The head moving arm is rotated by the cam gear to move the head plate 83 to the rotary head device 2.
The moving operation is performed between a retracted position at which the tape cartridge 5 is separated from the mounted tape cassette and an advanced position at which the rotary head device 25 enters the cassette 103 of the tape cassette.

In each of the cam grooves of the cam gear, the distance from the center of the cam gear increases or decreases depending on the direction in which the copying pin of the member to be moved in each of the modes is engaged. In each mode, a portion where a member not to be moved is engaged is formed such that a distance from the center of the cam gear is a constant initial distance.

In the tape drive device according to the present invention configured as described above, in the stop mode, the head plate 83 is set to the retracted position, and the FR slider 48 and the FF-Rew The slider is
It is located in the center. That is, at this time, the above F
The R gear arm is set at a neutral position where the FR gears 16 and 17 are located at the center of the reel shafts 19 and 23, and the gear support arms are supported by fourth and fifth reel gears 32 and 21. Are spaced apart from the seventh and eighth transmission gears 15 and 20.

When the tape cassette is mounted at the mounting position and the fast-forward mode is selected, the head plate 83 remains at the retracted position, and the F
The R slider 48 remains at the center position.

In the fast forward mode, the FF-Rew slider is slid in one direction. In the fast-forward mode, the drum drive motor is driven to rotate. When the FF-Rew slider is slid in one direction, the T-side gear support arm is rotated, and the fourth reel gear 32 supported by the T-side gear support arm is moved to the seventh transmission gear 15.
To be engaged.

Accordingly, at this time, the driving force of the drum drive motor is transmitted to the T-side reel shaft 19, and the T-side reel shaft 19 is engaged with the T-side tape reel engaged with the T-side reel shaft 19. By rotating the magnetic tape 106, the magnetic tape 108 is wound at a high speed.

In the rewind mode, the head plate 83 remains at the retracted position, and the FR slider 48 remains at the center position.
In the rewind mode, the FF-Re
The w slider is slid in the other direction. In the rewind mode, the drum drive motor is driven to rotate. When the FF-Rew slider is slid in the other direction, the S-side gear support arm is rotated, and the fifth reel gear 32 supported by the S-side gear support arm is connected to the eighth transmission gear 20. To be engaged. Therefore, at this time, the driving force of the drum drive motor is transmitted to the S-side reel shaft 23, which rotates the S-side tape reel 107 engaged with the S-side reel shaft 23. Operate the magnetic tape 10
8 is wound at high speed.

In the temporary stop mode, the head plate 83 is moved to the forward position, and the FR slider 48 and the FF-Rew slider are at the center position. That is, at this time, the FR gear arm is set to a neutral position where the FR gears 16 and 17 are located at the center positions of the reel shafts 19 and 23, and the gear support arms are supported by the fourth and fourth gears. The fifth reel gears 32 and 21 are separated from the seventh and eighth transmission gears 15 and 20.

In the forward recording (reproduction) mode, the head plate 83 is moved to the forward position, and the FF-Rew slider remains at the center position. In this progressive recording (reproduction) mode, the FR slider 48
As shown by the arrow O in FIG. 1, the slide operation is performed in the other direction. In the forward recording (reproduction) mode, the drum drive motor is driven to rotate.

When the FR slider 48 is slid in the other direction, the FR gear arm is rotated, and the first FR gear 16 supported by the FR gear arm meshes with the seventh transmission gear 15. Then, the second FR gear 17 is meshed with the first reel gear 18.
Therefore, at this time, the driving force of the drum drive motor is transmitted to the T-side reel shaft 19, and the T-side reel shaft 19 rotates the T-side tape reel 106 engaged with the T-side reel shaft 19. Then, the magnetic tape 108 is wound up.

At this time, as shown in FIG. 11, the link arms 68 and 70 are rotated. By the rotation of the link arms 68 and 70, the F capstan support arm 28 is rotated toward the tape cassette as shown by an arrow P in FIG. 11, and the F capstan shaft 7 is The magnetic tape 108 is pinched in cooperation with the F pinch roller 104. This magnetic tape 108
The traveling operation is performed at a constant speed in the forward direction as indicated by an arrow S in FIG.

Then, the rotary head device 25 is positioned by the cassette 103, and the magnetic tape
Write or read an information signal to or from the device.

In the reverse recording (reproduction) mode, the head plate 83 is operated to move to the forward position, and the FF-Rew slider remains at the center position. In the reverse recording (reproduction) mode, the FR slider 48 is slid in one direction as shown by an arrow Q in FIG.
In the reverse recording (reproduction) mode, the drum drive motor is driven to rotate.

When the FR slider 48 is slid in one direction, the FR gear arm is rotated, and the first FR gear 16 supported by the FR gear arm meshes with the eighth transmission gear 20. Then, the second FR gear 17 meshes with the third reel gear 22. Therefore, at this time, the driving force of the drum drive motor is transmitted to the S-side reel shaft 23, which rotates the S-side tape reel 107 engaged with the S-side reel shaft 23. Operate the magnetic tape 10
8 is wound up.

At this time, as shown in FIG. 8, each of the link arms 68 and 70 is rotated. By the rotation of the link arms 68 and 70, the R capstan support arm 29 is rotated toward the tape cassette as shown by an arrow R in FIG.
4 cooperates with the R pinch roller 105 to pinch the magnetic tape 108. The magnetic tape 108 is operated at a constant speed in the reverse direction as indicated by an arrow T in FIG.

Then, the rotary head device 25 is positioned by the cassette 103, and the magnetic tape 108 being run by the magnetic head 64 is operated.
Write or read an information signal to or from the device.

In the forward recording mode of the above-described tape drive, the magnetic tape 108 is used by the rotary head device 25 to write an information signal in a substantially half width portion as shown in FIG. Thus, a recording track 124 is formed. In the above-described reverse recording mode, the remaining portion where the information signal has not been written is
An information signal is written by the rotary head device 25, and a recording track 125 is formed.

At the end of the recording (reproduction) mode, the rotation operation on the reel shafts 19 and 23 and the capstan shafts 7 and 14 is completed. In this tape drive, each of the capstan shafts 7, 1
4, the winding prevention piece 81 is provided, so that at the end of the recording (reproduction) mode, even if the magnetic tape 108 is loosened, the magnetic tape 108 is not moved by the capstan shaft 7. , 14 are prevented.

This tape drive is a so-called non-tracking type digital signal recording and reproducing apparatus, and the information signal written on the magnetic tape 108 is a digital signal. In this tape drive, when the information signal is read from the magnetic tape 108, the tracking control for the magnetic head 64 is not performed, the read information signal is rearranged based on the address signal, and then the analog signal is read. Demodulate into a signal.

In this tape drive device, as described above, when the capstan shafts 7, 14 are pressed against the pinch rollers 104, 105, the pressing force is reduced. It is obtained by the elastic force of the tension coil spring 67. Therefore, the FR slider 48 is prevented from applying a stress in the lateral direction to the rotary head device 25, and the displacement of the rotary head device 25 with respect to the cassette 103 is prevented.

[0094]

As described above, in the tape drive device according to the present invention, the distal end of the support shaft protruding from the gear plate and rotatably supporting the second driven gear at the base end side is driven. A first driven gear rotatably disposed on the gear plate, rotatably supported on the source support plate to enable rotation of the gear plate about the support shaft; The distance to a drive gear provided on the drive source support plate can be adjusted.

Therefore, in this tape driving device, the positioning of the gear plate can be easily performed by using the support shaft without providing the rotation center shaft on the jig for holding the gear plate. , Can be done accurately.

[0096] In the above-described tape drive device, the distal end side of the support shaft has a stepped portion whose distal end side is reduced in diameter.
In the case where the positioning of the support shaft with respect to the drive source support plate in the axial direction is performed by the step portion, the positioning of the height position of the gear plate can also be performed by the support shaft.

Further, in each of the tape drive devices described above, when the drive gear is mounted on a drive shaft of a drum drive motor of a rotary head device provided on the drive source support plate, Each of the driven gears can be rotated by the drum drive motor.

In the tape drive device, the drive source support plate is disposed so as to be movable on the chassis, and the rotary head device is moved and operated together with the drive source support plate to be mounted on the chassis. When the positioning is performed by the mounted tape cassette, the gear plate is moved together with the drive source support plate while maintaining the position with respect to the drive source support plate, and is moved to a predetermined position with respect to the tape cassette. Is positioned.

That is, according to the present invention, the device configuration can be reduced in size,
It is possible to provide a tape drive device in which the number of parts is reduced, and in which the assembly jig can be simplified, downsized, and the assembly process can be simplified.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a main part of a tape drive according to the present invention and a main part of a tape cassette mounted on the tape drive.

FIG. 2 is a plan view showing a configuration of a rotary head device constituting the tape drive device.

FIG. 3 is a front view showing a configuration of the rotary head device.

FIG. 4 is a side view showing a configuration of a head plate supporting the rotary head device and a gear plate attached to the head plate.

FIG. 5 is a plan view showing a configuration of the head plate and the gear plate.

FIG. 6 is an enlarged perspective view of a main part showing a configuration of a support shaft for positioning the gear plate.

FIG. 7 is an enlarged vertical sectional view of a main part showing a configuration of the support shaft.

FIG. 8 is a plan view schematically showing a configuration of a main part of the tape drive device in a reverse mode.

FIG. 9 is an enlarged front view schematically showing a state of a recording track on a magnetic tape which is written and read by the tape driving device.

FIG. 10 is a plan view schematically showing a configuration of a main part of the tape drive device in a pause mode.

FIG. 11 is a plan view schematically showing a configuration of a main part of the tape drive device in a forward mode.

FIG. 12 is an exploded perspective view showing a configuration of the tape cassette.

[Explanation of symbols]

 Reference Signs List 1 gear plate 25 rotating head device 26 upper fixed drum 27 rotating drum 63 lower fixed drum 64 magnetic head 83 head plate 84 support shaft 95 reduced diameter portion 97 step portion 108 magnetic tape

Claims (4)

(57) [Claims] A drive gear provided on a drive source support plate; a first driven gear rotatably provided on a gear plate and meshed with the drive gear; A second driven gear rotatably supported on a base end of the provided support shaft and receiving a rotational driving force from the first gear; and a distal end side of the support shaft supporting the drive source. it is rotatably supported with respect to the plate, without allowing the pivotal movement around a support shaft of the gear plate, and wherein the distance to the drive gear of the first driven gear is adjustable Te <br/>-loop drive which. 2. The front end of the support shaft has a step portion whose front end portion is reduced in diameter, and the step portion performs axial positioning of the support shaft with respect to the drive source support plate. Tape drive. 3. The tape drive device according to claim 1, wherein the drive gear is mounted on a drive shaft of a drum drive motor of a rotary head device provided on the drive source support plate. 4. A drive source support plate is provided so as to be movable on a chassis, and the rotary head device is moved along with the drive source support plate to perform positioning by a tape cassette mounted on the chassis. 4. The tape drive according to claim 3, wherein the tape drive is performed.