JPH0795383B2 - Tape recording / reproducing mechanism of magnetic recording / reproducing apparatus - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a tape loading mechanism of a magnetic recording / reproducing apparatus.

[Background of the Invention]

Generally, in a magnetic recording / reproducing apparatus for recording / reproducing a signal using a tape cassette, at the time of recording / reproducing, a magnetic tape is pulled out from the tape cassette and loaded onto a predetermined tape traveling path around a rotating cylinder, and recording / reproducing is performed. At the end, a magnetic tape loading mechanism is used for retracting the magnetic tape from the tape running path and storing it in the tape cassette. In such a magnetic recording / reproducing apparatus, the mechanism occupies a very large proportion in terms of size reduction and weight reduction, and the entire size of the mechanism is substantially determined by the formation state of the tape running system of the magnetic tape.

Therefore, various tape running systems have been conventionally developed for the purpose of reducing the size and weight of the entire apparatus.
-160362, the magnetic tape in the tape cassette is guided diagonally to the entry side of the rotary cylinder by the tape guide, and the magnetic tape in the tape cassette is exited by the other tape guide. It is proposed that the guides are directed parallel to the side. This conventional example is very effective for thinning the entire device because the space above the tape cassette when the lid provided on the tape cassette is opened when the cassette is installed can be used as the tape loading space. However, when forming the tape running path, the magnetic tape inside the tape cassette is wound around the rotating cylinder within a predetermined angle range by the respective postures of the plurality of auxiliary guides, so it is easy to apply an unreasonable force to the magnetic tape. The magnetic tape is damaged depending on the posture of each auxiliary guide. That is, in the above-mentioned conventional example, the magnetic tape is constructed so that the height of the magnetic tape gradually increases from the tape cassette while being attached to each auxiliary guide. The tape has an unnatural posture, and as a result, excessive tension is applied to the magnetic tape. In addition, since it is necessary to control the posture of each auxiliary guide with high accuracy, the mechanism is complicated.

[Object of the Invention]

It is an object of the present invention to provide a tape loading mechanism for a magnetic recording / reproducing apparatus, which is capable of preventing damage to a magnetic tape during a loading or unloading process by a simple mechanism, except for the above-mentioned drawbacks of the prior art. .

[Outline of Invention]

The present invention relates to a position between a position of a tape guide group for pulling out a magnetic tape during movement and a running direction of the magnetic tape determined by a wrap angle of the magnetic tape around an inclined guide for guiding the magnetic tape obliquely to run. And the wrapping angle is sequentially increased as the tape guide group moves upward or downward. That is, according to the present invention, the inclined guide is arranged in the tape running path between the tape cassette and the rotary cylinder, and the tape guide group forming the tape running path is provided at least on the inlet side or the outlet side of the rotary cylinder. On the other hand, the driving means for driving the tape guide group includes a first guide for pulling out the magnetic tape substantially horizontally from the tape cassette and a second guide for pulling out the magnetic tape obliquely with respect to the tape cassette. It is characterized in that the magnetic tape is attached to the inclined guide by continuing the movement of the second guide even after the movement of the first guide is completed.

Example of Invention

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

1 and 2 are plan views of a tape loading mechanism of a magnetic recording / reproducing apparatus according to the present invention, FIG. 3 is a side view of the state of FIG. 2 seen from the tape entrance side, and FIG. 1 is a loading process. 2 shows the loading completion state.

In these figures, 1 is a substrate, 2 is a rotating cylinder on which a magnetic head (not shown) is mounted, 3 is a tape cassette, and inside the tape cassette 3, a supply reel 4 on which both ends of a magnetic tape 6 are wound. And the winding side reel 5 are built in,
The magnetic tape 6 is formed by the pins 7a and 7b in the tape cassette 3.
Is stretched as shown by a broken line in FIG. Also, 8a and 8b are guide rollers, 9a is an inlet side inclined guide, and 9b.
Is an outlet side inclined guide, the guide roller 8a and the inlet side inclined guide 9a are planted in a guide base described later in a predetermined positional relationship, and similarly the guide roller 8b and the outlet side guide roller 9b are also described later. It is erected on the guide base in a predetermined positional relationship. Reference numeral 10 is a tension pin for detecting the tension of the running magnetic tape 6, and the tension pin 10 is erected on a tension arm described later. The tension pin 10 constitutes a first guide, and the guide rollers 8a, 8b, the inlet side inclined guide 9a and the outlet side inclined guide 9b described above constitute a second guide.
Reference numeral 11 is an opening formed in front of and below the tape cassette 3, and 12 is a tape cassette 3 for opening and closing the opening 11.
This is the lid of the tape cassette 3 when the tape cassette 3 is attached to the device.
The lid 12 is opened so that the guide roller, the inlet side inclined guide 9a, the outlet side inclined guide 9b, and the tension pin 10 are inserted into the inside of the opening 11. Also, 13
Is a fixed guide that regulates the running height of the magnetic tape 6 pulled out from the tape cassette 3, 14 is an inclined guide embedded in the substrate 1, 15 is a full width erasing head, 16 is an impedance roller, and 17 is an A / C. A head, 18 is a capstan, and 19 is a pinch roller.

When the magnetic tape 6 is in the unloading state as shown by the broken line, the guide rollers 8a, 8b, the inlet side inclined guide
9a, the outlet side inclined guide 9b, and the tension pin 10 are at the positions shown by the broken lines in the figure. When loading the magnetic tape 6 from such an unloaded state, the tension pin 10 first moves along the path (a) shown by the broken line in the figure and is held at a predetermined position near the tilt guide 14. That is, the magnetic tape 6 supplied from the supply reel 4 passes through the pin 7a in the tape cassette 3,
The fixed guide 13 and the tension pin 10 on the apparatus side are wound in a state substantially parallel to each other and positioned near the inclined guide 14 (see FIG. 1).

On the other hand, the guide roller 8a and the inlet-side inclined guide 9a move integrally along the path (b), and the guide roller 8b and the outlet-side inclined guide 9b integrally move along the path (c). The 8a and the inlet side inclined guide 9a are arranged so as not to reach the position of the magnetic tape 6 until the magnetic tape 6 is positioned in the state shown by the solid line in FIG.
Then, when the magnetic tape 6 is positioned in the vicinity of the inclined guide 14, the guide roller 8a and the entrance side inclined guide 9a move while moving upward while catching the magnetic tape 6 with respect to the substrate 1. In this way, when the guide roller 8a and the inlet side inclined guide 9a move up the path (b),
In the ascending process, the magnetic tape 6 is gradually wound around each of the tilt guide 14 and the rotary cylinder 2, and is given an upward traveling direction by the tilt guide 14 so that the magnetic tape 6 slidably contacts the full width erasing head 15 and the impedance roller 16. After doing
It is guided by the guide roller 8a and the inlet side inclined guide 9a to reach the rotary cylinder 2.

Further, the magnetic tape 6 which has come out of the rotary cylinder 2 has its running posture adjusted to a plane parallel to the tape cassette 3 by the guide roller 8b moving along the path of (c) and the outlet side inclined guide 9b. After the A / C head 17, the capstan 18, the pinch roller 19, and the pin 7b in the tape cassette 3, the magnetic tape 6 is taken up by the take-up reel 5 and the loading operation of the magnetic tape 6 is completed (see FIG. 2). When the magnetic tape 6 is running, the pinch roller 19 moves to the broken line (d) in FIG.
The magnetic tape 6 is transferred by being pressed against the capstan 18 as shown by, and the capstan 18 being rotated by the driving force from the motor (not shown) in this state.

On the other hand, when the magnetic tape 6 is unloaded, the loading mechanism performs an operation that is the reverse of the above-described operation at the time of loading.

Next, the winding operation of the magnetic tape 6 on the rotary cylinder 2 will be described in more detail with reference to FIGS. 4 and 5.

4 and 5 are bottom views of a part of the tape loading mechanism shown in FIG. 1 as seen from the back surface of the substrate 1. In FIG. 4, the magnetic tape 6 is unloaded as indicated by the broken line in FIG. FIG. 5 shows the loading state, and FIG. 5 shows the loading state of the magnetic tape 6 indicated by the solid line in FIG. In these figures, 20 is a rotary body having a cam groove 36, and the rotary body 20 is supported by a shaft 23 planted in the substrate 1 and is rotatable. A gear 21 is formed on the outer periphery of the rotating body 20. The gear 21 is a bearing 24 mounted on the substrate 1.
It meshes with the worm gear 22 held by a and 24b. 28
Is a motor having a pulley 27 directly connected to its output shaft. The pulley 27 is a pulley 25 directly connected to one end of the worm gear 22.
The rotary force of the motor 28 is transmitted to the rotating body 20 via the pulley 27, the belt 26, the pulley 25 and the worm gear 22.

Reference numeral 29 denotes an arm rotatably supported by the shaft 23, and the arm 29 is biased in the counterclockwise direction in the drawing by the force of a spring (not shown) so as to rotate integrally with the rotating body 20. There is. This arm 29 is connected to the arm 31 via the pin 30.
However, an arm 33 is rotatably connected to the arm 31 via a pin 32, and a guide base 35 is rotatably connected to the arm 33 via a pin 34. The guide base 35 has been described above. A guide roller 8a and an entrance side inclined guide 9a are mounted.

Reference numeral 38 denotes a slider having an elongated hole 38a, a pin 37 implanted at one end of the slider 38 engages with the cam groove 36, and a U-shaped portion 38b is formed at the other end of the slider 38. Has been done. The long holes 38a are pins 39a and 39b implanted in the substrate 1.
And the slider 38 engages with these pins.
Guided by 39a, 39b, it is slidable in the left-right direction in the drawing.

40 is a tension arm, and the tension arm 40
Is rotatably supported by a shaft 41 planted in the substrate 1, and is urged by a spring 43 in the arrow (e) direction (clockwise direction). The tension pin 40 described above is implanted at one end of the tension arm 40, and the pin 42 is implanted at the other end of the tension arm 40.
It engages with the U-shaped portion 38b of 38.

Although not shown, the gear 21 of the rotary body 20 is meshed with another rotary body. This rotating body rotates in the opposite direction to the rotating body 20 in association with the rotation of the rotating body 20, and when the other rotating body rotates, the guide roller 8b and the outlet side inclined guide 9b described above are mounted. The guide base is integrally rotated via a plurality of arms. Therefore, when the rotating body 20 rotates due to the rotation of the motor 28,
Other rotating bodies (not shown) also rotate in the opposite direction to the rotating body 20, and the rotation of these rotating bodies causes the guide base 35 having the guide roller 8a and the inlet-side inclined guide 9a to pass through the route (B) in FIG. Along with the guide roller 8b and the outlet side inclined guide 9b, the other guide base (not shown) moves along the path (c) in FIG.

The operation of the above configuration will be described below for the tape entrance side.

In the unloaded state shown in Fig. 4, the guide base
Guide roller 8a mounted on 35 and inlet side inclined guide 9a
(Neither is shown), and the tension pin 10 implanted in the tension arm 40 is in the position shown by the broken line in FIG. When the motor 28 is energized in this state, the rotation of the motor 28 causes the rotating body 20 to rotate counterclockwise in the figure,
Accordingly, the engagement between the cam groove 36 and the pin 37 causes the slider to move.
38 moves to the left in the figure. When the slider 38 moves to the left, the tension arm 40 rotates in the arrow (e) direction around the shaft 41 due to the engagement between the U-shaped portion 38b and the pin 42, and the tension arm 40 is planted in the tension arm 40. The magnetic tape 6 is pulled out from the tape cassette 3 by the tension pin 10 provided. Further, by rotating the rotating body 20 and the arm 29 integrally and rotating in the counterclockwise direction, the guide base 35 connected to the arm 29 via the other arms 31 and 33.
Is the rotating cylinder 2 along the guide groove 44 provided on the substrate.
Move in the direction (see FIG. 5). Where the guide base
Guide roller 8a and inlet side inclined guide 9a mounted on 35
The length of each arm 29, 31, 33 is set so that the position does not reach the position of the magnetic tape 6 stretched by the tension pin 10.

When the rotating body 20 further rotates in the counterclockwise direction from this state, the pin 37 engages with the equal-diameter portion of the cam groove 36, so that the position of the tension arm 40 remains unchanged and the guide base 35.
Moves along the path (b) shown in FIG. 1 while hooking the magnetic tape 6 and ascends with respect to the substrate 1, and finally forms the tape running path shown in FIGS. 2 and 3. . In the ascending process, the magnetic tape 6 is gradually wound around each of the tilt guide 14 and the rotary cylinder 2,
Since the magnetic tape winding state in the front loading process wound around the inclined guide 14 gradually becomes upward, and the guide base 35 is in a correspondingly upward path.
During the ascending process, it is stretched between the guide roller 8a and the inlet side inclined guide 9a on the guide base 35 and the apparatus side inclined guide 14, and between the guide roller 8a and the inlet side inclined guide 9a and the rotary cylinder 2, respectively. It is less likely that an unnatural and unreasonable force is applied to the magnetic tape 6 to be removed. In addition, the final tape running path shown in FIG. 2 and the tape running path during the loading process do not cause a large deviation in the posture and position of the magnetic tape 6, and thus the damage of the magnetic tape 6 is prevented. Can be prevented.

Although not shown in the drawings on the tape outlet side, as described above, when the rotating body 20 rotates, the guide roller mounted on the guide base (not shown) is accompanied by it.
8b and the exit side inclined guide 9b move along the path of (c) of FIG. 2 to form a predetermined tape running path. Further, the loading length of the guide roller 8b and the outlet side inclined guide 9b, that is, the loading length of the tape outlet side, and the above-mentioned loading length of the guide roller 8a and the inlet side inclined guide 9a, that is, the loading length of the tape inlet side are almost the same. The lengths of the arms and the gear ratios of the two rotating bodies are set so that they are equal.

〔The invention's effect〕

As described above, according to the present invention, the magnetic tape has a path for horizontally drawing out from the tape cassette and a path for obliquely drawing out, and the operation of obliquely drawing out is continued even after the path for horizontally drawing out is completed first. As a result, the magnetic tape is wound around the inclined guide, so that the winding angle of the magnetic tape around the inclined guide is sufficiently secured, and therefore the magnetic tape is not damaged during the loading or unloading process with a simple structure. It is possible to provide a tape loading mechanism for a magnetic recording / reproducing apparatus which is capable of preventing the above-mentioned problems and which is excellent in the above-mentioned drawbacks of the prior art.

[Brief description of drawings]

1 and 2 are plan views of a tape loading mechanism of a magnetic recording / reproducing apparatus according to the present invention, FIG. 3 is a side view of the state of FIG. 2 as seen from the tape entrance side, and FIGS. FIG. 3 is a bottom view of a part of the tape loading mechanism shown in FIG. 1 viewed from the back surface of the substrate. 1 ... Substrate, 2 ... Rotating cylinder, 3 ... Tape cassette, 4 ... Supply reel, 5 ... Take-up reel, 6 ...
Magnetic tape, 8a, 8b …… Guide roller, 9a …… Inlet side inclined guide, 9b …… Outlet side inclined guide, 10 …… Tension pin, 13 …… Fixed guide, 14 …… Inclined guide, 20 …… Rotating body, 35 …… Guide base, 40 …… Tension arm.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Shigemura 1410 Inada, Katsuta City, Ibaraki Prefecture Inside the Tokai Plant, Hitachi, Ltd. (56) References JP 59-217263 (JP, A) JP 56 -119967 (JP, A) JP-A-61-68763 (JP, A)

Claims (1)

[Claims] 1. A rotary cylinder having a magnetic head mounted thereon, a tape cassette containing a magnetic tape wound around a pair of reels, and a tape for drawing out the magnetic tape from the tape cassette to form a predetermined tape running path. A group of guides,
In a magnetic recording / reproducing apparatus provided with a drive means for driving the tape guide group, an inclination guide is arranged in a tape traveling path between the tape cassette and the rotary cylinder, and the tape guide group is A first guide for pulling out the magnetic tape substantially horizontally with respect to a surface orthogonal to the rotation axis of the reel on at least one of the entrance side and the exit side of the rotary cylinder, and the magnetic tape orthogonal to the rotation axis of the reel. A second guide that is pulled out obliquely with respect to the surface to be driven, and the driving means includes the second guide after the completion of the movement of the first guide.
The tape loading mechanism of the magnetic recording and reproducing apparatus, wherein the guide is continuously moved to attach the magnetic tape to the inclined guide.