JPS61202364A - Cassette type magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce considerably the size of an cassette type magnetic recording/reproducing device in the tape width direction, by setting a guiding device of a lead-out roller which leads a magnetic tape out of a cassette toward a rotary head cylinder at the side opposite to a substrate centering on the tape. CONSTITUTION:A guide rail 62 having a U-shaped section and a hook-shaped tip is attached to two posts 60 and 61 set on a substrate 5. A drive rope 57 is stretched within the U-shaped frame and the tip part of a hook pin 65 is hooked to the rope 57. A lead-out arm 64 slides along a guide groove 63 of the rail 62. Thus the attachment accuracy and stability are improved for a tension roller, a tension post, a guide roller, etc. which control the tape drive by setting a guiding device of a lead-out roller into a space above a cassette. This secures the excellent record/reproduction performance and also reduces greatly the size of a cassette type magnetic recording/reproducing device in the tape width direction.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cassette type magnetic recording/reproducing device.

(Prior art) In recent years, the uses of cassette-type magnetic recording and reproducing devices have diversified.
Various formats have been devised depending on the usage. Among them, there is a type in which a rotating head cylinder is arranged in a direction substantially perpendicular to the direction in which the magnetic tape is pulled out from the cassette.

A conventional cassette type magnetic recording/reproducing device will be explained with reference to FIGS. 5 to 8. 5 and 6 are a plan view and a side view, respectively, of a conventional tape drawer, and FIGS. 7 and 8 are an auxiliary plan view and side view for explaining the operation.

In FIG. 5, a magnetic tape 2 stored in a cassette 1
The state in which the reel holder 3 is attached to the pair of reel stands 3 is shown by a dashed line. An erasing head 4, which will be described later, is depicted on the upper left of the cassette 1.

A feed screw 9 having a worm gear 8 at one end is rotatably attached to two supports 6 and 7 attached to the substrate 5, and a guide shaft 10 is attached parallel to the feed screw 9, respectively.

A feed bar 1 having a guide portion 11a that slides on a guide shaft 10
1 is provided with an engagement pin 13 that engages with a feed groove 12 carved in the feed screw 9 from its lower surface, and moves left and right as the feed screw 9 rotates.

A drive rod 14, which is slidably held on the substrate 5 substantially parallel to the guide axis IO, drives rotating arms 15 and 16, which will be described later, at the rear of the right end and the front of the center, respectively. The racks 17 and 18 also have a hook portion 19 formed at their left end to engage with the above-mentioned feed base 11, and are always urged rightward by a tension coil spring 20 attached to their right end.

The rotating arm 15 has a freely rotatable tension roller 21 attached to its tip, and has a sector gear 22 fixed to its rear end, and is rotatably attached to the base plate 5 concentrically with the axis of the sector gear 22. ing. In addition, the sector gear 22 has an idle gear 23 that meshes with it, and a pinion gear 24 that meshes with the rack 17 on the rear side of the right end of the drive rod 14, which are meshed in sequence.
The sliding motion of the drive rod 14 is converted into the rotation of the rotating arm 15.

The rotation arm 16 has a tension post 25 fixed to its tip, and has a rotation shaft 27 formed at its rear end with a small gear 26 that meshes with the rack 18 on the front side of the center of the drive rod 14.
is fixed and rotatably attached to the base plate 5 concentrically with the axis of the first rotation shaft 27, and rotates in accordance with the sliding movement of the drive rod 14.

The swinging arm 29 has a pull-out roller 28 rotatably attached to its tip, and is connected to a connecting arm 31 rotatably attached to the upper left corner of the feed table 11 at one end by an articulated pin 30 at its center. A sliding pin 32 is supported at the other end so as to be rotatable with respect to each other, and furthermore, a sliding pin 32 which is slidably supported on the feed base 11 is fixed to the rear end. In addition, the sliding pin 32
The other end of the tension coil spring 33 is fixed to the right end of the feed base 11 and always biases the swing arm 29 and the connecting arm 31 in the opening direction. A stopper 34 that engages with the sliding pin 32 described above is provided on the board 5, and when the feed base 11 shown in FIG. 5 is at the end of the feed screw 9, the sliding pin 32 is It functions to press and close the swing arm 29 and the connecting arm 31.

In addition, a stopper 35 for regulating the sliding position of the feed table 11 is fixed to the left support table 7.

A worm 36 that meshes with the worm gear 8 at the terminal of the above-mentioned feed screw 9 is rotatably mounted. In addition.

The worm 36 is connected to a loading motor (not shown).

In FIG. 7(a), a loading ring 38 has a gear 37 fixed to its lower end surface, and a pinch roller 38 is attached to its upper end surface.
A retraction roller 40 that rotates in conjunction with 9, two rotatable guide rollers 41 and 42, and a guide post 43 are installed, and a loading motor (not shown) is installed.
A drive gear 44 connected to the gear 37 meshes with the gear 37 and is driven.

Inside the loading ring 38, there is a rotary head cylinder 45 containing a magnetic head (not shown), a sound erasing head 46, a sound control head 47. Two guide posts 48 and 49 are arranged around the rotary head cylinder 45, one guide post 50 is arranged in line with the voice control head 47, and a capstan 51 are arranged on the base plate 5, respectively. Also, a guide roller 52 is provided at the upper left end of the cassette 1.
is rotatably attached to the substrate 5.

The operation of the cassette type magnetic recording/reproducing apparatus configured as described above will be explained.

In FIG. 5, the cassette 1 is mounted on the reel stand 3,
When the loading motor rotates, the feed screw 9 rotates clockwise from the support base 7 toward the feed base 11 via the worm 36 connected to the motor. A feed base 11 equipped with an engagement pin 13 that engages with a feed groove 12 of the feed screw 9 moves to the left as the feed screw 9 rotates. When the feed bar 11 moves to the left, the sliding pin 32 moves to the right on the feed bar 11 relative to the feed bar 11 due to the tensile force of the tension coil spring 33, and the link between the swing arm 29 and the connecting arm 31 is The magnetic tape 3 is rotated in the direction of arrow A by mechanical operation and pulled out from the cassette 1.

Subsequently, the feed table 11 moves to the left while pulling out the magnetic tape 2 from the cassette 1 with the pull-out roller 28, and its tip hits the hook portion 19 of the drive rod 14, which is connected to the tension coil spring attached to the rear end. Slide it to the left against a tensile force of 20. When the drive rod 14 slides to the left, the rotating arm 16 to which the pinion 26 that meshes with the rack 18 is fixed counterclockwise, and the pinion 24 that meshes with the rack 17 and the sector gear that meshes via the idler gear 23 move counterclockwise. 2
The rotating arms 15 to which 2 are fixed rotate simultaneously in the clockwise direction.

FIG. 7(a) shows a state in which the feed table 11 is engaged with the stopper 35 of the support table 7 and stopped. The magnetic tape 2 pulled out by the pull-out roller 28 is stretched as shown in the figure by the tension post 25 and the tension roller 21 attached to the tips of the two rotating arms 16 and 15.

Next, a drive gear 44 connected to a loading motor
rotates, the loading ring 38 rotates counterclockwise, and a pull-in roller 40 mounted on the loading ring 38 contacts the loop of the magnetic tape 2 from inside and draws it so as to wrap it around the rotary head cylinder 45.

The position of the magnetic tape 2 indicated by the dashed line in FIG. 7(a) is when the loading ring 38 is rotated approximately 90 degrees.
FIG. 7(b) shows the state after further rotation of about 180 degrees, and FIGS. 8(a) and (b') show the state at the final position of rotation. That is, as the loading ring 38 rotates, the magnetic tape 2 is wound around the retracting roller 40, the audio control head 47, and the guide post 50, completing the magnetic tape running path shown in FIG. 8(a). 39 is pressed against the capstan 51 to run the magnetic tape.

(Problems to be Solved by the Invention) However, in the above-described configuration, the pull-out roller 2
Lead screw 9 that drives 8. A driving device consisting of a guide shaft IO1, a feed table 11, etc. is all arranged between the magnetic tape 2 and the substrate 5, and there is also enough space to avoid contact with the loading ring 38, pinch roller 39, retracting roller 40, etc. Therefore, it was necessary to increase the distance between the magnetic tape 2 and the substrate 5.

Therefore, not only is it impossible to reduce the tape width dimension of the cassette type magnetic recording/reproducing apparatus, but also the guide roller 52. Since all the parts that regulate tape running, such as the tension post 25, are far away from the board 5,
The mounting accuracy and stability were extremely poor, and there was a problem in that it was difficult to obtain good recording and reproducing performance.

The present invention solves the above-mentioned problems, and aims to provide a cassette-type magnetic recording and reproducing device in which the size of the device in the tape width direction is significantly reduced and has excellent recording and reproducing performance.

C) In order to solve the above-mentioned problems, in the present invention, the guide device for the pull-out roller that pulls out the magnetic tape from the cassette in the direction of the rotating head cylinder is placed on the opposite side of the substrate across the magnetic tape. By arranging the tension post, tension roller, guide roller, etc. that regulate tape running, the distance between the substrate and the substrate can be shortened.

(Function) According to the present invention, the guide device for the pull-out roller that pulls out the magnetic tape does not come into contact with other running parts such as the loading ring and the pinch roller. Since the attached rotating arm and the like can be placed close to the board, it is easy to ensure precision in mounting, and excellent stability can be obtained.

Further, above the cassette mounting section, a space is always required for mounting a cassette holding device, its locking device, and the like.

Therefore, a space is created on the opposite side of the board with the magnetic tape in between, where nothing is placed except the cassette loading device, and the guide device for the pull-out roller is placed in this space. , new installation requires no space.

Furthermore, since there is no space to avoid contact with the loading ring or the like, the size of the cassette magnetic recording/reproducing device in the tape width direction can be significantly reduced.

(Example) A cassette type magnetic recording/reproducing apparatus of the present invention will be explained with reference to FIGS. 1 to 4. 1 and 2 are a plan view and a side view of the tape drawer according to the present invention, FIG. 3 is a plan view when the tape drawer is completed, and FIGS. 4(a) and (
b) is a detailed view of the engagement part of the drawer arm and the guide rail.

In FIG. 1, a magnetic tape 2 stored in a cassette 1
The state in which the reel holder 3 is attached to the pair of reel stands 3 is shown by a dashed line.

In FIGS. 1 and 2, two groove wheels 55 and 56 are rotatably attached to two support stands 53 and 54 mounted on a base plate 5, respectively.
A driving rope 57 is stretched around 5 and 56 in a rectangular shape. Note that the drive rope 57 includes a drive rod 58, which will be described later.
An engagement piece 59 for driving is fixed.

A guide rail 62 having a U-shaped cross section with a hook-shaped portion formed at the tip is attached to two support columns 60 and 61 planted on the base plate 5, and the driving rope 5 described above is mounted within the U-shaped frame.
7 is posted.

In FIG. 4, an engaging pin 65 and a guide pin 66 of a pull-out arm 64, which has a pull-out roller 28 rotatably attached to its tip, engage with a guide groove 63 formed on the inner surface of the frame of the guide rail 62. In addition, the tip of the engagement pin 65 is engaged with the drive rope 57, and the guide groove 63 of the guide rail 62 is engaged with the drive rope 57.
The drawer arm 64 is adapted to slide along.

Returning to FIGS. 1 and 2, the drive rod 58 in which a guide slit 68 that engages with two guide protrusions 67 implanted in the base plate 5 is formed has a rack 69 on its front side and a rack 69 on its rear side. A slot (not shown) through which the drive rope 57 is inserted so as to engage with the aforementioned engagement piece 59 fixed to the drive rope 57
A bent portion 70 is formed, and is urged leftward by a tension coil spring 71 attached to the left end of the bent portion 70.

A rotary arm 72 has a freely rotatable tension roller 21 attached to its tip, and has a small gear 73 fixed to its rear end that meshes with the rack 69, and rotates around the board 5 concentrically with the axis of the small gear 73. It is movably mounted and rotates in accordance with the sliding movement of the drive rod 58.

A rotating arm 74 having a tension post 25 fixed to its tip is rotatably attached to the base plate 5 and attached to the rack 69 described above.
A gear 76 that meshes with the small gear 75 that meshes with the gear 75 is fixed to the rear end portion, is rotatably attached to the base plate 5 concentrically with the axis of the gear 76, and rotates in accordance with the sliding movement of the drive rod 58.

The drive rope 57 described above is driven by a loading motor (not shown) connected to the groove wheel 56.

Everything except the tape drawer mentioned above is the same as the conventional example,
The explanation will be omitted.

The operation of the cassette-type magnetic recording and reproducing apparatus configured as described above will be explained.

As shown in FIG. 1, the cassette 1 is mounted on the reel stand 3,
When a loading motor (not shown) rotates, the loop of drive rope 57 shown in FIG. 2 is driven by the motor and rotates counterclockwise.

As the drive rope 57 rotates, the pull-out arm 64 fixed to the engagement pin 65 latched thereto moves to the left, and as the guide pin 66 moves along the hook-shaped portion of the guide rail 62, the pull-out arm 64 rotates in the direction of arrow B, and the pull-out roller 28 attached to its tip pulls out the magnetic tape 2 from the cassette 1, and continues to pull it out linearly to the left.

From the point in time when the drive rope 57 continues to rotate and the engagement piece 59 fixed thereto engages the bent portion 7o of the drive rod 58,
The drive rod 58 begins to move rightward against the tension coil spring 71. A rack 69 formed on the drive rod 58 rotates the two small gears 73 and 75 meshed with it clockwise, and a rotating arm 72 fixed to the small gear 73 rotates clockwise to the gear 76 meshed with the small gear 75. The fixed rotating arms 74 each rotate counterclockwise, and the tension roller 21 and tension post 25 attached to their respective tips pull out the magnetic tape 2 so as to expand from inside thereof.

On the other hand, the pull-out arm 64 further moves to the left, and when its engagement pin 65 reaches the left end of the guide rail 62, the pull-out of the magnetic tape (not shown) is completed, as shown in FIG.
) is the position of the magnetic tape 2 shown by the solid line. Thereafter, the operation of drawing the magnetic tape 2 toward the rotary head cylinder 45 is the same as in the conventional example.

(Effects of the Invention) According to the present invention, the guide device for the pull-out roller can be placed in a space above the cassette that has not been used conventionally.
The installation of tension rollers, tension posts, guide rollers, etc. that regulate tape running improves accuracy and stability, not only providing excellent recording and playback performance, but also greatly reducing the tape width dimension of the device. Therefore, it is possible to obtain a cassette type magnetic recording/reproducing device that is small and has excellent recording/reproducing performance.

[Brief explanation of drawings]

1 and 2 are a plan view and a side view of the drawer section of the cassette type magnetic recording/reproducing apparatus according to the present invention, FIG. 3 is a plan view showing the state when the drawer is completed, and FIGS.
) is a partial enlarged view and sectional view of the guide rail and drawer arm, FIGS. 5 and 6 are a plan view and side view of the conventional drawer part, and FIGS. 7(a), (b), and 8. (
A) and (B) are a plan view and a side view for explaining the progress of the operation of a conventional drawer part and a retracting part. 1...Cassette, 2...Magnetic tape, 3
... Reel stand, 4 ... Erasing head, 5 ...
・Substrate, 6, 7.53.54...Support stand, 8...
・Worm gear, 9...Feed screw, 10...Guide shaft, 11...Feed stand, lla...Guiding part, 12...
...Feed groove, 13.65...Engagement pin, 14.58.
... Drive rod, 15° 16.72, 74 ... Rotating arm, 17, 18, 69 ... Rack, 19 ... Hook part, 2
0,33,71...Tension coil spring, 21...Tension roller, 22...Sector gear, 23...Idle gear, 24,26,73.75...Small gear, 25.
...Tension post, 27...Rotation axis, 28...
Pull-out roller, 29... Swinging arm, 30... Connecting pin, 31... Connecting arm, 32... Sliding pin,
34.35...Stopper, 36...Warm,
37, 76... Gear, 38... Loading ring, 39... Pinch roller, 40... Pulling roller, 41, 42, 52... Guide roller, 43, 48
゜49.50... Guide post, 44... Drive gear,
45... Rotating head cylinder, 46... Sound erasing head, 47... Sound control head, 51... Capstan, 55, 56... Groove wheel, 57... Drive rope, 59...・Engagement piece, 60, 61... Support, 62・
... Guide rail, 63 ... Guide groove, 64 ... Drawer arm, 66 ... Guide pin, 67 ... Guide projection, 6
8...Guiding slit, 70...Bending portion. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 4 (a) (b)

Claims (1)

[Claims] In a cassette-type magnetic recording/reproducing device in which a rotating head cylinder is arranged in a direction substantially perpendicular to the direction in which the magnetic tape is pulled out from the cassette, the guide device for the pull-out roller that pulls out the magnetic tape from the cassette in the direction of the rotating head cylinder is connected to the cassette. A cassette-type magnetic recording and reproducing device characterized in that it is disposed on the opposite side of the mounting surface with a magnetic tape in between.