JPH0626062B2 - 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 into a predetermined tape running 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 developed so far for the purpose of reducing the size and weight of the entire apparatus.
As described in Japanese Patent Laid-Open No. 5-160362, the magnetic tape in the tape cassette is guided obliquely to the entry side of the rotary cylinder by the tape guide, and the magnetic tape in the tape cassette is guided by the other tape guide. It is proposed that the guides are guided in parallel to the exit side. In this conventional example, the space above the tape cassette when the lid provided on the tape cassette is opened when the cassette is mounted can be used as the tape loading space,
This is very effective for thinning the entire device, but when forming the tape running path, the magnetic tape in the tape cassette is wound around the rotating cylinder within a certain angle range by the respective postures of the plurality of auxiliary guides. Since the magnetic tape is mounted, it is easy to apply an unreasonable force to the magnetic tape, and the magnetic tape may be 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]

In the present invention, the tape guide group for winding the magnetic tape in the cassette around the rotary cylinder has the first object of forming the tape running system in the loading completed state, and the attitude of the magnetic tape during loading is The auxiliary guide, which comes into contact only with the magnetic tape on the way, and the tape guide group cooperate to stabilize the magnetic tape. That is, according to the present invention, an auxiliary guide is provided in the vicinity of the tape running path, the auxiliary guide being arranged independently of the movement of the tape guide group forming the tape running path. It is characterized in that it is configured to abut and not abut the magnetic tape at least when the loading 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 stretched by the pins 7a and 7b in the tape cassette 3 as shown by a broken line in FIG.
Further, 8a and 8b are guide rollers, 9a is an inlet side inclined guide, and 9b is an outlet side inclined guide.
a and the inlet side inclined guide 9a are planted in a guide base described later in a predetermined positional relationship.
b and the outlet side guide roller 9b are also planted in another guide base described later in a predetermined positional relationship. 10 is a tension pin for detecting the tension of the running magnetic tape 6,
The tension pin 10 is erected on a tension arm described later. Reference numeral 11 denotes an opening formed in front and below the tape cassette 3, and reference numeral 12 denotes a lid of the tape cassette 3 for opening and closing the opening 11.
When this is mounted on the device, the lid 12 is opened and the guide rollers 8a, 8b, the inlet side inclined guide 9a, the outlet side inclined guide 9b, and the tension pin 10 are inserted into the opening 11. Has become. Further, 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 implanted in the substrate 1, 15 is a full-width erasing head, 16 is an impedance roller, and 17 is an A / C 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, the tension pin 1
0 is at the position shown by the broken line in the figure. When loading the magnetic tape 6 from such an unloading state, first, the tension pin 10 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 supply side reel 4
The magnetic tape 6 supplied from the tape cassette 3 is wound around the fixed guide 13 and tension pin 10 on the apparatus side in a substantially parallel state via the pin 7a in the tape cassette 3 and positioned near the inclined guide 14 (see FIG. 1). reference).

On the other hand, the guide roller 8a and the inlet side inclined guide 9a integrally move along the route (b), and the guide roller 8b and the outlet side inclined guide 9b integrally move along the route (c). The entrance-side inclined guide 9a does not 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, the guide roller 8
When the "a" and the inlet side inclined guide 9a move in the path of (b) while moving upward, the magnetic tape 6 gradually winds around the inclined guide 14 and the rotary cylinder 2 in the ascending process. Then, after being provided with an upward traveling direction and slidably installed on the full width erasing head 15 and the impedance roller 16, the guide roller 8a and the inlet side inclined guide 9a lead to the rotary cylinder 2.

After 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 and the exit side inclined guide group 9b which move along the path of (c). , A / C head 17, capstan 18, pinch roller 19, and pin 7b in the tape cassette 3 to be wound up on the winding-side reel 5 to complete the loading operation of the magnetic tape 6 (see FIG. 2).
When the magnetic tape 6 is running, the pinch roller 19 is in pressure contact with the capstan 18 as shown by the broken line (d) in FIG. 2, and in this state the capstan 18 is driven by a motor (not shown).
The magnetic tape 6 is transported by being rotated by the driving force from the magnetic tape 6.

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 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 seen from the back surface of the substrate 1. In FIG. 4, the magnetic tape 6 is shown in broken line in 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 rotating body having a cam groove 36,
The rotating 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, and the gear 21 meshes with a worm gear 22 held by both bearings 24 a and 24 b mounted on the substrate 1. 28 is a motor in which a pulley 27 is directly connected to its output shaft. The pulley 27 is connected to a pulley 25 connected to one end of the worm gear 22 via a belt 26. The rotational force of the motor 28 is the pulley 27,
It is transmitted to the rotating body 20 via 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 counterclockwise in the figure by the force of a spring (not shown) so as to rotate integrally with the rotating body 20. There is. An arm 31 is rotatably connected to the arm 29 via a pin 30, a 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 is equipped with the guide roller 8a and the inlet side inclined guide 9a described above.

Reference numeral 38 denotes a slider having an elongated hole 38a, a pin 37 implanted at one end of the slider 38 is engaged with the cam groove 36, and a U-shaped portion 38 is provided at the other end of the slider 38.
b is formed. The elongated holes 38a are engaged with pins 39a and 39b planted in the substrate 1, respectively, and the slider 38 is guided by these pins 39a and 39b and slidable in the left-right direction in the drawing.

40 is a tension arm, and the tension arm 4
0 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). This tension arm 4
The tension pin 10 described above is planted at one end of 0, and the pin 42 is planted at the other end.
2 is engaged with the U-shaped portion 38b of the slider 38.

Although not shown, the gear 21 of the rotary body 20 is meshed with another rotary body. This rotating body is the rotating body 20.
When the other rotating body rotates in the opposite direction to the rotating body 20 in conjunction with the rotation of the guide roller 8, the guide roller 8 described above is rotated.
A guide base on which b and the outlet side inclined guide 9b are mounted is integrally rotated via a plurality of arms. Therefore, the rotation of the motor 28 causes the rotor 2 to rotate.
When 0 rotates, 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 be mounted in the direction shown in FIG. The guide roller 8b and the other guide base (not shown) mounted with the exit side inclined guide 9b move along the route (b) of FIG. 1 and move along the route (c) of 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 roller 8a mounted on the guide base 35, the inlet side inclined guide 9b (neither is shown), and the tension arm 4 are provided.
The tension pin 10 implanted at 0 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 in the counterclockwise direction in the figure, and along with this, the engagement between the cam groove 36 and the pin 37 causes the slider 38 to move leftward in the figure. When the slider 38 moves to the left, the U-shaped portion 38b and the pin 4
The engagement of the tension arm 40 with the shaft 4
The magnetic tape 6 is pulled out from the tape cassette 3 by the tension pin 10 which is rotated in the direction of the arrow (e) around the position 1 and is planted in the tension arm 40. Further, the rotating body 20 and the arm 29 are integrally formed and rotated in the counterclockwise direction, so that the guide base 35 connected to the arm 29 via the other arms 31 and 33 is
It moves in the direction of the rotary cylinder 2 along the guide groove 44 provided on the substrate (see FIG. 5). Here, the guide base 3
The positions of the guide roller 8a and the inlet side inclined guide 9a mounted on the armature 5 are set so as not to reach the position of the magnetic tape 6 stretched by the tension pin 10,
The lengths of 31 and 33 are set.

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 the same and the guide base 35 holds the magnetic tape 6 in place. Shown in Fig. 2 while hooked
The tape moves along the path (b) while moving upward with respect to the substrate 1, and finally forms the tape running path shown in FIGS. 2 and 3.

Next, the operation of the ascending process will be described in more detail with reference to FIGS. 6 to 8.

FIG. 6 corresponds to FIG. 5, showing the state before the guide base 35 is raised, and FIG. 7 shows the state during the rise of the guide base 35.
FIG. 8 shows the loading state in which the guide base 35 has been completely lifted. In these figures, 44
Is an arm rotatable about a pin 45 implanted in the substrate 1, and the full width erasing head 15 and the impedance roller 16 are mounted on the arm 44. The arm 44 is urged in the counterclockwise direction in the drawing by a spring 46 engaged with one end of the arm 44, and in the present embodiment, the other end is in contact with the tilt guide 14 to restrict the rotation. , Other members provided on the substrate 1 are connected to the arm 44.
It can also be used as a stopper. Reference numeral 49 denotes an auxiliary arm that is rotatable about a pin 50 that is planted in the substrate 1. The auxiliary arm 49 passes through the lower surface of the arm 44 and is folded back so that its tip is located above the arm 44. A tilt assist guide 48 is provided upright on the folded portion. The auxiliary arm 49 is urged in the clockwise direction in the figure by a spring 51 that is engaged with the center of the auxiliary arm 49, and a part of the auxiliary arm 49 abuts on a locking pin 47 that is vertically provided on the arm 44. The rotation is restricted.

As shown in FIG. 6, in a state before the guide base 35 enters the ascending process, the arm 44 abuts the tilt guide 14 and stops at the position shown in the figure, and the tilt assist guide 48 moves the tilt guide 14 and the full width erasing head. It is located off the line connecting 15 and.

As shown in FIG. 7, when the guide base 35 moves along the route (b) shown in FIG. 2 from this state, the arm 44 located in the route abuts the side portion of the guide base 35. , The arm 44 rotates in the clockwise direction in the figure around the pin 45 against the spring 46. This arm 4
By rotating 4, the full width erasing head 15 and the impedance roller 16 on the arm 44 are retracted from the rotary cylinder 2, so that the winding of the magnetic tape 6 around the full width erasing head 15 and the impedance roller 16 is released. on the other hand,
Since the auxiliary arm 49 is rotated counterclockwise in the drawing around the pin 50 by the locking pin 47 of the arm 44, the tilt auxiliary guide 48 on the auxiliary arm 49 advances toward the rotary cylinder 2 side, Instead of the full width erasing head 15 and the impedance roller 16, a tilt auxiliary guide 48 winds the magnetic tape 6.

That is, in the loading process, the magnetic tape 6 that has come out of the tension pin 10 is wound around the tilt guide 14 and given a slight amount of upward component, and is further wound around the tilt assist guide 48 to be further lifted. The components are given to form a path to the inlet side inclined guide 9a and the guide roller 8a. Therefore, by appropriately setting the tilt angle of the tilt assist guide 48, the tilt assist guide 4 is provided between the tilt guide 14 and the tilt assist guide 48.
8 and the inlet side inclined guide 9a and the guide roller 8a, and between the guide roller 8a and the rotary cylinder 2 are less likely to be applied with an unnatural and unreasonable force.

In the above description, the magnetic tape 6 is wound around the tilt guide 14 and the tilt assist guide 48 at the initial stage of loading, but it is natural that the same effect can be obtained by winding the magnetic tape 6 only around the tilt assist guide 48. . Also, arm 4
The magnetic tape 6 may be wound around each guide on the upper part 4. Further, although the auxiliary arm 49 is configured to rotate in the above-described embodiment, the operation of the auxiliary arm 49 may be any movement path including linear movement as well as rotation. From this state, as shown in FIG. 8, the guide base 3
When 5 is further raised and positioned near the rotary cylinder 2, the arm 44 is released from contact with the guide base 35, so that the arm 44 is rotated again by the spring 46 to a position where it contacts the tilted guide 14, On the other hand, since the locking pin 47 of the arm 44 moves in the direction of the rotary cylinder 2, the auxiliary arm 49 is rotated by the spring 51 in the clockwise direction in the figure. By the rotation of the arm 44 and the auxiliary arm 49, the full width erasing head 15 and the impedance roller 16 separated from the magnetic tape 6 being loaded are wound around the magnetic tape 6, while the magnetic tape 6 being loaded is being loaded.
The tilt assist guide 48 that was in contact with the magnetic tape 6 is separated from the magnetic tape 6, and the tape running path shown in FIG. 2 is formed. That is, in the loading completion state, the tilt auxiliary guide 48 does not participate in the formation of the tape running path, and the tape path between the tilt guide 14 and the entrance side tilt guide 9a is formed by the full width erasing head 15 and the impedance roller 16. Will be done.

In the above embodiment, the auxiliary arm 49 is driven by the arm 44, but it goes without saying that the auxiliary arm 49 may be driven by another drive source so as to perform a predetermined operation.

Although the tape outlet side is not shown in the drawing, as described above, when the rotating body 20 rotates, the guide roller 8b and the outlet side inclined guide mounted on the guide base (not shown) accordingly. 9b moves along the path shown in FIG. 2C to form a predetermined tape running path. Also,
The loading lengths of the guide roller 8b and the outlet side inclined guide 9b, that is, the tape outlet side loading length, and the guide roller 8a and the inlet side inclined guide 9 described above.
The length of each arm and the gear ratio of both rotating bodies are set so that the loading length of a, that is, the loading length on the tape inlet side is substantially equal.

Although the above embodiment has described the case where the tape paths on the outlet side of the rotary cylinder are parallel to each other, even when the outlet side forms a three-dimensional tape running system, the same inclination as on the inlet side in the present embodiment is used. As a matter of course, the auxiliary guide may be provided.

As described above, according to the present invention, in the process of obliquely loading or unloading the magnetic tape by the tape guide group, the magnetic tape can be loaded without being involved in the tape running path in the loading completed state. Since an auxiliary guide that can contact only the magnetic tape is provided, and this auxiliary guide is arranged independently of the movement of the tape guide group,
It is possible to provide a tape loading mechanism of a magnetic recording / reproducing apparatus capable of accurately controlling the attitude of the magnetic tape during loading with a simple structure and thus preventing damage to the magnetic tape, except for the drawbacks of the above-mentioned prior art.

[Brief description of drawings]

1 and 2 are plan views of a tape loading mechanism of a magnetic recording / reproducing apparatus, and FIG. 3 is a side view of the state of FIG. 2 as seen from the tape entrance side. 4 and 5 are bottom views of a part of the tape loading mechanism shown in FIG. 1 seen from the back side of the substrate, FIG. 6, FIG.
FIG. 8 is a plan view showing a part of the tape loading mechanism in the process of raising the guide base. 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, 15 ... Full width erasing head, 16 ... Impedance roller, 35 ... Guide base, 44 ... Arm, 4
5, 50 ... Pin, 46, 51 ... Spring, 47 ... Locking pin, 48 ... Inclination auxiliary guide (auxiliary guide), 49 ...
… Auxiliary arm.

Claims (2)

[Claims] 1. A tape for forming a predetermined tape running path by pulling out a magnetic tape wound between a rotary cylinder having a magnetic head and a reel in a cassette from the cassette and winding the magnetic tape around the rotary cylinder at a predetermined angle. In a magnetic recording / reproducing apparatus provided with a guide group and a drive means for driving the tape guide group, an auxiliary guide is provided in the vicinity of the tape running path, the auxiliary guide being arranged independently of the movement of the tape guide group. A tape loading mechanism for a magnetic recording / reproducing apparatus, wherein the auxiliary guide is configured to contact the magnetic tape only during a predetermined period during loading and not to contact the magnetic tape at least when loading is completed. 2. The auxiliary guide is configured such that a winding angle of the magnetic tape is changed during a predetermined period during which the auxiliary guide is in contact with the magnetic tape. The tape loading mechanism of the magnetic recording / reproducing apparatus as described in.