JPH02130747A - Tape loading mechanism for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To make the title mechanism smaller in constitution and, at the same time, to stabilize the running of a tape by loosely coupling a tape transferring member with a tape drawing-out member and not applying the press-contacting force of the drawing-out member by means of a positioning member to the tape transferring member as a load. CONSTITUTION:When a tension pin 4 is moved in the direction shown by the arrow A by means of a cam, the loading ring 18a of a tape transferring member is simultaneously revolved in the direction shown by the arrow B and forms a drawing-out member together with a tape drawing-out member 8. Then a guide base 5 loosely coupled with the ring 18a through a coupling member 19 provided with a long hole is press- contacted and positioned by means of a press-contacting arm 33 after the base 5 is revolved and positioned by means of a positioning member 32 which is not coupled with the ring 18a. Therefore, the press-contacting force does not become the load to the ring 18a. Moreover, when the ring 18a revolves, the tape drawing-out member 8 is revolved and a tape 1 is loaded on a rotary drum 10 in a long-span state. With a small-size constitution which can make the load to the ring 18a and the ring driving force smaller, the tape span can be elongated and the running of the tape can be stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and particularly to a tape loading mechanism suitable for downsizing the mechanism.

[Conventional technology]

Generally, in the tape loading mechanism of a magnetic recording/reproducing device, which pulls out a magnetic tape from a cassette and wraps it around a rotating drum containing a rotating head at a predetermined angle, the tape is pulled out to form a predetermined tape path in order to simplify the mechanism. Tape pull-out member (tape guide) for
Mounted on the rotating ring placed around the rotating drum,
Many methods have been adopted in which the tape pull-out member is moved to a predetermined position by rotationally driving a rotating ring. In systems that use cassettes such as 8mm video cassettes, where a dead space is created on the top surface of the cassette due to the opening of the front lid, the height of the center of rotation of the rotating drum is set at In order to make effective use of the dead space, the height of the tape in the cassette reel is also set considerably high. Therefore, in order to load the tape at the above height position on the cylinder entry side, it is necessary to make the tape span as long as possible from when the tape leaves the cassette until it enters the rotating drum. As a result, the number of tape guides increases, and they are arranged apart from each other. In loading using the rotating ring, during loading, at least one of the tape pull-out members is largely displaced radially outward from above the rotating ring to secure a desired position;
A mechanism is adopted to hold this tape pull-out member with a positioning member.In addition, in the unloading state,
In order to pack the tape pull-out members as small as possible and accommodate them in the cassette opening, a mechanism that can change the interval between the tape pull-out members is also required.

Conventionally, as this type of device, for example, Japanese Patent Application Laid-Open No. 57-1335
There is a technique described in Publication No. 58. In this conventional example, as a means for changing the interval between the tape pulling members, the tape pulling members are rotated on a rotating ring via a crimping mechanism having a coil spring with a large displacement. When the rotating ring is further rotated from the state in which the pull-out member is supported on a ring and is in contact with a predetermined positioning member,
By changing the interval between the tape pull-out members, a predetermined pressing force was obtained (by the biasing force of the spring).

[Problem to be solved by the invention]

In the above conventional technology, since the crimping mechanism of the tape pull-out member moves together with the rotating ring, it is necessary to secure a space for its movement in the thickness direction or the radial direction of the rotating ring. At the time of completion, the pressure reaction force of the tape pull-out member concentrates and becomes a rotational load on the rotating ring, which causes the problem of increasing the size of the loading motor, which is an obstacle to making the device smaller and lighter.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to ensure that a tape pull-out member that changes its relative position on a rotary ring or other transfer member is in a predetermined position, and that the rotational load due to crimping is applied. It is an object of the present invention to provide a tape loading mechanism for a magnetic recording/reproducing device, which prevents concentration of the magnetic tape and allows the device to be made smaller and lighter.

[Means to solve the problem]

In order to achieve the above object, in the present invention, a guide pace is provided on a guide pace transfer member (rotating ring in this embodiment), and a tape guide is installed at one end of an arm having a rotating shaft. By adopting a structure in which the position of the guide base can be changed, and by arranging the guide pace crimping mechanism near the positioning member (catcher) of the guide, it is possible to optimize the crimping timing and crimping force of the guide base. The structure is as follows. Further, by making the support part of the arm connecting the guide base transfer member and the guide base to be the eldest, the interval between the guide paces can be changed.

[Effect]

In the present invention, as the guide base transfer member operates, the guide base connected to the transfer member (ring gear in this embodiment) via an arm moves along a predetermined path, and the guide base is positioned at a predetermined position. Once there, it changes its position relative to the drive member. As the movement of the drive member further progresses and the guide base reaches a predetermined positioning member, it is reliably positioned with a predetermined pressure by a crimping mechanism dedicated to the guide pulse, which is disposed near the positioning member. . At this time, since the crimping timing of the other guide bases can be shifted from the crimping timing of the guide, the crimping load is not concentrated at one point in time. When the movement of the transfer member further progresses, the relative position between the transfer member and the guide base can be changed by the elongated hole provided in the connecting portion of the connecting arm with the transfer member, so that the loading At completion, a tape running bus with widely spaced guides is possible.

〔Example〕

Hereinafter, the structure and operation of an embodiment of the present invention will be explained in detail with reference to FIGS. 1 to 7. FIG. A schematic plan view in an unloading state. FIG. 2 shows the magnetic recording/reproducing apparatus shown in FIG. 1 in a fully loaded state. Referring to FIGS. 1 and 2, an outline of the entire apparatus will be explained. .

The magnetic tape 1 is attached to the supply reel 5 within the chain double-dashed line of the cassette 2.
Passing through the te/shigon bin 4, the inclined bin 6 set up on the guide base 5, the second guide roller 7 on the approach side also set up, and the first guide roller 9 on the approach side set up on the guide base 8. , a predetermined angle (226°) to the rotating drum 10
The magnetic tape 1 that has been wound and then exited the rotating drum 10 is placed in an exit-side inclined bin 1 that is set up on a guide base 11.
2. Similarly, through the exit side first height regulation guide 16, the pinch roller 14, and the exit side second height regulation guide 15,
While being driven at a constant speed by the capstan 16 and the pinch loaf P14, the magnetic tape 1 is wound onto the take-up reel 17 in the cassette 2. During this time, the magnetic tape 1 is attached to the rotating drum 10 facing 180 degrees. Rotating head (
(not shown), signals are recorded and reproduced.

In the device of this embodiment, the entry guide bases 5 and 8 are movably supported on an entry loading ring 18 (a) provided on the outer periphery of the rotating drum 10, and especially the entry guide base 5 is the entry side loading ring 18
(a) via a connecting arm 19. Here, the connecting arm 19 is connected to the entrance side low gain ring +
The guide base 5 is rotatably supported by the bin 20 installed on the top of the guide base 5, and since this connecting portion is long, the guide base 5 is rotatably supported by the other end of the connecting arm 19. In addition, the connection distance with the entry side loading ring 18 (a) can be changed.
a) is the bottle 22 (c) planted on the chassis 21>
, 22 (1) J), guided by a loading motor 26, a gear 24 provided coaxially, a worm gear 25, and a dog gear 26 pivotally supported on the chassis 21.
At this time, the guide base 8 is guided by a guide rail 28 provided on the outer periphery of the rotating drum 10 and is transferred to a predetermined position. On the other hand, the guide base 5 is moved to a predetermined position along a guide groove 29 provided in a guide plate (not shown) provided on the outer periphery of the rotary drum 10.

The guide base 10 also includes the exit side loading ring 1
8(b)K, is rotatably supported via a connecting arm 460, and is transferred to a predetermined position along the guide groove 31 of a guide plate provided on the outer periphery of the rotating drum 10.

As described above, a tape running path as shown in FIG. 2 is formed from the state shown in FIG. 1.

Next, according to FIGS. 3, 4, and 5, the rotating drum 1
The loading operation of the entry guide paces 5 and 8 will be explained in detail.

FIG. 5 is an enlarged plan view of the entrance tape loading mechanism in the unloading state, FIG. 4 is an enlarged plan view of the tape loading mechanism in the loading completion state of FIG.
3 shows a side view of the guide base 5 in the figure.

First, from the state shown in FIG. 3, the tension pin 4 is rotated in the direction of arrow (A) by a cam (not shown), and then the entry side loading ring 18(a) is connected to the drive system as described above. Start rotating in the direction of arrow (B). Then, as the entry side loading ring 18 (~) rotates, the guide pace 5.8 starts moving.

At this time, since the pin 20 is located at the end of the elongated hole provided in the connecting arm 19, the pin 20 is located at the front end of the elongated hole (
The guide base 5 starts moving for the first time when it comes into contact with the connecting side of the guide base 5. Here, 32 is a positioning member of the guide base 5 fixed at a predetermined position on the chassis 21, and 33 is a positioning member 6.
It is a crimp arm that is pivotally supported around a pin 54 that is set up on a pin 54, and is biased with a predetermined force in the direction of arrow (C) by a torsion spring 35, and is a positioning member! The position is regulated by a stopper 36 provided on +2. Also, 37 is
As the rotation of the height regulation guide pivotally supported on the positioning member 52 further progresses, the guide base 5.8 moves along the predetermined movement path as described above. 4. Move to the position shown in Figure 4. As shown, the guide base 5 is spaced apart from the rotating drum 10 by a large distance, and is positioned by a positioning member 32 as shown in FIG. At this time, the guide base 5 is applied with an optimum pressure force by the pressure bonding arm 63 as shown in FIG. Accordingly, the positioning portion 7 (a) of the second guide roller 7 on the entrance side
) is regulated in position by the V-groove 52(a) of the positioning member 32, and the height regulating surface 32(b) of the positioning member 32 is
), the height is regulated. Further, the pin 34 set on the guide base 5 is inserted into the guide groove 52 (
c) By abutting against the wall surface, the rotation of the center axis of the second guide roller 7 on the entry side is restricted, and positioning is ensured.

On the other hand, as shown in FIG. 4, the guide base 8 rotates further after the positioning of the guide base 5 is completed (the state of the entry side loading ring 18(a)). Therefore, the guide base 8 is positioned at a predetermined position via a crimping mechanism (not shown). At this time, the connecting arm 19 only changes from the state n indicated by the broken line to the state indicated by the solid line, and does not affect the positioning state of the guide base 5.Next, as shown in FIG. The positioning will be explained in more detail.

FIG. 6 is a plan view showing the positioning process of the guide base 5. FIG. 6(a) shows that the positioning portion 7(a) of the second guide roller 7 on the entry side is connected to the V-groove portion 32 of the positioning member 32.
(a), and when the entry side loading ring +8 (a) further rotates in the direction of arrow (B) from this state, the guide base 5 rotates around the positioning part 7 (a) as indicated by the arrow ( C) direction, and at this time the guide pace is 5.
The end portion of the crimp arm 35 rotates in the direction of arrow (D) against the biasing force of the crimp arm 36 .

FIG. 6(1)) shows a state in which the rotation of the guide base 5 has been completed and the guide base 5 has been positioned by the biasing force of the crimping arm 63. When the entry side loading ring 18(a) further rotates in the direction of arrow (B), the connecting arm 19 rotates around the connecting pin 64 with the guide base 5, as shown in FIG. 6(C). .

At this time, the connecting portion of the connecting arm 19 with the pin 20 is configured to have a predetermined length υ, so that even if the pin 20 moves away from the guide base 5, the connection with the connecting arm 19 will not separate. . Further, the positioning state of the guide base 5 is not affected, and the positioning state is reliably maintained.

Further, FIG. 7 is a relational diagram showing the load state of the loading motor 23 during the loading process. In this figure, the dashed line 38 indicates the load characteristic when the conventional mechanism is used, and the solid line 39 indicates the load characteristic when the mechanism of the present invention is used. In the conventional mechanism, the crimping load W of the guide base 5 is applied to the loading motor 23 when loading is completed, but in the mechanism of the present invention, the crimping load W of the guide base 5 is applied to the loading motor 23.
Since it is possible to shift the crimping timing of the guide bases 8 and 100, the load on the loading motor 25 at the time of completion of loading can be kept small, making it possible to downsize the motor. According to
In addition, since the crimping mechanism for the guide base 5 is provided on the guide base positioning member 52, the connection between the loading link 18) and the guide base 5 is simple and crimping is possible. Since no space is required for the mechanism to move, the mechanism can be made smaller and thinner. Furthermore, since the crimping timing of the guide base 5 can be shifted from the crimping timing of the other guide bases 8 and 10, it is possible to reduce the maximum load in the loading process.

Also, the loading ring 18(a) of the connecting arm 19
Since the connecting portion with the guide roller 7 is made long, the guide roller 7.
9 can be changed, increasing the degree of freedom in guide arrangement and guide configuration in terms of tape running path design.

Now, in this embodiment, a rotating ring placed around the outer periphery of the rotating drum is used as a means for transferring the guide, but of course, means other than the rotating ring, such as a transferring means using a link or a slider, may be used. Even if the mechanism of invention is applied,
It is possible to obtain a similar effect.

〔Effect of the invention〕

According to the present invention, when a long tape span length is required to correct the tape height deviation between the cassette and the drum on the tape entry side or the tape exit side of the drum, other Since the guide base whose relative position with respect to the guide changes can be reliably positioned at a predetermined position, tape running can be stabilized. moreover,
The crimping timing of the displacing guide base can be staggered from the crimping timing of other guide bases, and the crimping reaction force is not constantly applied to the guide base transfer means, making the guide base transfer motor (loading motor) more compact. It is possible. In addition, since the crimping mechanism of the displacing guide base does not move with the guide base, the device can be made smaller and thinner.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a magnetic recording and reproducing apparatus equipped with a tape loading mechanism according to an embodiment of the present invention in an unloading state, and FIG. 2 is a schematic plan view showing a state in which the loading of FIG. 1 is completed. Fig. 3 is an enlarged plan view of the tape loading mechanism on the drum entry side in an unloading state, Fig. 4 is an enlarged plan view showing the loading completion state of Fig. 3, and Fig. 5 is an enlarged plan view of the guide base in the loading completion state. FIG. 6 is a plan view showing the positioning process of the guide base 5, and FIG. 7 is a relational diagram showing the load state of the loading motor during the loading process. 1... Magnetic tape, 5... Guide base, 6...
Inclined pin, 7...Second guide roller on the entrance side, 10...
- Rotating drum, 18(a)... Entry side loading ring, 19... Connection arm, 23... Loading motor, 32... Positioning member, 35... Crimp arm, 35... Torsion spring. Figure 1

Claims (1)

[Claims] 1. Pull out the drum (10) equipped with a rotating head and the recording tape (1) from the cassette (2), and
10) a plurality of tape pull-out members (5, 8, 11) that are wound at a predetermined angle to form a predetermined recording tape path;
A transfer member (18(a),
18(b) and the transfer member (18(a), 18(b)
) displacement means () for displacing at least one of the plurality of tape pull-out members (5, 8, 11) toward the outside of the transfer member (18(a), 18(b)) as the tape pull-out member (5, 8, 11) moves in the loading direction. 29); and a positioning member (52) that holds the plurality of tape pull-out members (5, 8, 11) at different positions when loading is completed, the tape loading mechanism of a magnetic recording and reproducing device comprising: (a)) and the tape pull-out member (5), a connecting member (19) that connects the tape pull-out member (5) in a loosely fitable manner; In (32), the crimping member (
33), and transfers the pressing force of the tape pull-out member (5) to the transfer member (1).
8(a)) A tape loading mechanism of a magnetic recording/reproducing device, characterized in that it is configured so as not to place a load on the tape loading mechanism. 2. The connecting member (19) that connects the transfer member (18(a)) and the tape pull-out member (5) has a loose fitting hole in the engagement part, and the connecting member (19) connects the transfer member (18(a)) and the tape pull-out member (5). 2. A tape loading mechanism for a magnetic recording and reproducing apparatus according to claim 1, wherein the articulated link (19) is such that the positioning direction of the tape pull-out member (5) is the same. 3. A tape loading mechanism for a magnetic recording/reproducing apparatus according to claim 1, wherein the pressure bonding member (33) is installed on a positioning member (32).