JPS6123583B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In order to record or reproduce signals on a magnetic tape housed in a cassette, a part of the magnetic tape is pulled out from the cassette and a tape guiding drum including a rotating magnetic head is installed. The present invention relates to a tape loading device for carrying a magnetic tape to a transducer unit such as the above, or for storing a magnetic tape that has been further carried to the transducer unit into the cassette. .

In conventional tape loading devices used, for example, in cassette-type video tape recorders, the guide pole for pulling out the magnetic tape from the cassette also doubles as a running guide for the magnetic tape after tape loading is completed. It's getting old. However, in such a structure, if the positioning of the guide pole is not determined due to changes in the tension of the magnetic tape, especially after loading is completed, the magnetic tape will move up and down in the width direction. Not only is it difficult to reproduce the running conditions, but the tension of the magnetic tape fluctuates and the head touch of the rotating magnetic head becomes insufficient, resulting in the problem of not being able to stably record and reproduce signals. It was hot.

For this reason, it is necessary for the guide pole to move smoothly when drawing out the tape, and to be securely held and fixed in a predetermined position after loading is completed.

The present invention has been made in view of the above points, and uses a band-shaped elastic member such as a leaf spring, and by moving the band-shaped elastic member in its length direction, the guide pole is driven and the tape is pulled out. The operation can be carried out with a simple structure, and after loading is completed, the elastic force of the band-shaped elastic member is used to generate a pressing force that can hold and fix the guide pole in a predetermined position. This makes it possible to realize a reliable tape loading device.

Furthermore, in the present invention, when the tape is loaded from two directions by the two guide poles and brought to the transducer section, each guide pole is placed on the outer periphery of the one rotary drive section corresponding in the radial direction. By engaging and bringing the band-shaped elastic bodies involved in movement into contact, one rotary drive unit can
This makes it possible to realize a tape loading device with a very simple configuration that can simultaneously move the two guide poles in different directions.

Further, the present invention further provides a method for guiding the elastic band member by forming wall-shaped guide members disposed on both sides of the elastic band member into a desired shape. Even if the guide pole is curved, it is possible to move the guide pole on the same or approximately the same trajectory as the shape of the guide member, thereby providing a degree of freedom and leeway in the transportation design of the guide pole, resulting in a very compact tape. This makes it possible to realize a loading device.

Furthermore, in video tape recorders that use the so-called M loading method, in which the tape is loaded in two directions using two guide poles and brought to the transducer, the tape is generally placed on the side closest to the take-up reel. Since the tape tension on the magnetic tape is higher than the tension on the tape supply side, stable running of the magnetic tape may be affected. Therefore, in the present invention, the two elastic band members that drive the two guide poles to generate the pressing force have different spring constants or different amounts of deflection deformation when pressed, so that the winding By generating a larger pressing force on the guide pole closer to the reel, it has become possible to realize a tape loading device that can stably run the magnetic tape.

Hereinafter, an example in which the present invention is implemented in a rotating magnetic head type magnetic recording/reproducing device will be explained with reference to the drawings. In FIG. 1, reference numeral 20 denotes a substrate, which includes an erasing head 10, a magnetic head 12 for recording and reproducing audio signals, a capstan 14, a pinch roller 16, and rotating magnetic heads 17a and 17.
A tape guide drum 18 having a built-in tape, a reel stand (not shown), etc. are arranged. Further, in the portions of the substrate 20 located on both sides of the tape guide drum 18, there are two arc-shaped long holes 22a,
22b is bored so as to surround the tape guide drum 18. Note that the long holes 22a, 2
One end of 2b is located at a location where a tape cassette 38, which will be described later, is installed, and the other end is located at a location where a tape cassette 38, which will be described later, is installed.
It is located near the back of 8. In addition, the long hole 2
A guide pole 26a is provided at the other end of 2a, 22b.
Two stoppers 24a, 24b are fixed, constituting stopping means for preventing movement of 26b. A slide body 28 in which the guide poles 26a and 26b are installed perpendicularly to the substrate 20.
a, 28b are movable along the elongated holes 22a, 22b. As part of the moving means 29a, 29b of the slide bodies 28a, 28b, the substrate 20
Two leaf springs 32, which are band-shaped elastic members, are located below the elongated holes 22a and 22b and are sandwiched between guide walls 30a and 30b provided on both sides of the long holes 22a and 22b.
a, 32b are arranged. Each of the above leaf springs 32
square holes (34 in Fig. 4) are drilled at the same pitch in the length direction of each of a and 32b. As the sprocket 36 rotates, the leaf springs 32a, 32b
is moved along its length.

The slide bodies 28a, 28b are attached to one ends of the leaf springs 32a, 32b, and therefore, as the leaf springs 32a, 32b move, the slide bodies 28a, 28b move toward the elongated hole 28.
It moves on the substrate 20 while being guided by the guides a and 22b.

The tape cassette 38 used in this embodiment includes a magnetic tape 40, a take-up reel 44, and a supply reel 46.
magnetic tape 4 on the front of the case.
Opening (or notch) 4 that allows you to pull out 0
2a and 42b are provided.

When the tape cassette 38 is attached to a predetermined location on the board 20, the guide pole 26
a and 26b are located inside the magnetic tape 40 which is stretched across the openings 42a and 42b.

FIG. 2 shows the magnetic tape 40 in a loaded state, and FIG. 3 is a back view of the main part of FIG. 2 as viewed from the back. As the sprocket 36 rotates counterclockwise in FIG. 1 or 2, the leaf springs 32a, 32b are extended in the directions of arrows A and B, respectively.
Slide bodies 28a, 28 attached to one end of 2b
b indicates arrows A and B along the elongated holes 22a and 22b.
move in the direction.

The guide poles 26a and 26b fixed on the slide bodies 28a and 28b pull out the magnetic tape 40 from the tape cassette 38 as they move.

Furthermore, the slide bodies 28a and 28b are
When moving in the direction B, the guide poles 26a, 26b come into contact with the stoppers 24a, 24b and stop.

Even after the guide poles 26a, 26b come into contact with the stoppers 24a, 24b and the movement of the slide bodies 28a, 28b is stopped, the sprocket 36 is rotated for an arbitrary period of time to move the leaf springs 32a, 32b in the direction of arrow A. When further extended in the direction B, the leaf springs 32a and 32b move toward the guide wall 30
Part 31 made wider with room for a and 30b
The guide poles 26a and 26b are buckled and deformed at the ends a and 31b, and the restoring force generates a strong pressing force in the directions of arrows D and E, and the guide poles 26a and 26b are pressed and fixed against the stoppers 24a and 24b.

At the position where the guide poles 26a, 26b are pressed and fixed to the stoppers 24a, 24b, the magnetic tape 40 is in contact with the erasing head 10, the magnetic head 12 for recording and reproducing audio signals, the tape guide drum 18, etc., and the loading is completed. The disc becomes ready for recording or playback.

Here, the guide pole 26b on the side closer to the take-up reel 44 shown in FIG. 2 is normally subjected to a stronger tape tension than the guide pole 26a on the side closer to the supply reel 46. Therefore, it is desirable that the guide pole 26b on the winding side presses the stopper 24b with a stronger pressing force than the guide pole 26a on the supply side. For this reason, in the embodiment of the present invention, as illustrated in FIG.
Adjustment walls 48a and 48b are provided at 31b and are movable in a direction substantially perpendicular to the elongated holes 22a and 22b. The adjustment walls 48a, 48b are connected to the plate spring 3.
When 2a and 32b undergo buckling deformation, the leaf spring 3
Arc 50a formed by deformation of 2a, 32b,
50b, and the leaf spring 3
The amount of buckling deformation of 2a and 32b can be adjusted. Therefore, the pressing force in the directions of arrows D and E, which is the restoring force of the leaf springs 32a and 32b, can be adjusted freely.

Note that although the above-described embodiment of the present invention uses a leaf spring as the moving means, other belt-shaped elastic members such as a timing belt may be used, and the rotational drive unit is not limited to a sprocket. It goes without saying that the same method can be implemented using, for example, meshing gears, friction driving means, or the like.

As is clear from the above description, the tape loading device of the present invention uses a band-shaped elastic member as a moving means for pulling out the tape and bringing it to a predetermined position. The guide pole is driven in the horizontal direction to pull out the tape, and after the guide pole has moved to a predetermined position, it serves as a pressing force applying means to press and hold the guide pole at the predetermined position. Also, it is possible to provide a tape loading device with a small number of parts and an extremely simple structure.

In addition, even in a configuration in which the tape is loaded from two directions by two guide poles and wound around the tape guide drum, two band-shaped elastic members are opposed to and in contact with the outer periphery of one rotary drive unit. By arranging the guide poles in this manner, not only can the two guide poles be moved simultaneously in different directions without using any direction changing means, but also the springs of the two band-shaped elastic members can be moved simultaneously. By making a difference in the constant or by making a difference in the amount of deformation of the elastic member, a difference is generated in the force with which the two band-shaped elastic members press each guide pole against each stopper after loading is completed. It is also possible to ensure stable running of the tape.

Furthermore, by keeping the shape of the wall-shaped guide members arranged on both sides of the band-shaped elastic member in a desired shape, the guide pole can be moved even if it is a discontinuous curve other than a straight line. The trajectory can have any shape, and the present tape loading device can be accommodated in a small predetermined space, which is advantageous in terms of design and manufacturing.

As described above, the tape loading device of the present invention has a simple configuration with a small number of parts and has many features. Of course, it is obvious that the present invention is applicable not only to the rotating magnetic head type magnetic recording/reproducing apparatus as shown in the drawings, but also to recording/reproducing apparatuses using a fixed magnetic head.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a rotary head type magnetic recording/reproducing device according to an embodiment of the present invention in a stopped state, FIG. 2 is a plan view of the same device in a tape withdrawn state, and FIG. 3 is a main part of FIG. 2. The back view and FIG. 4 are enlarged side sectional views of essential parts in the embodiment of the present invention. 18...Tape guide drum, 20...Substrate,
22a, 22b... Long hole, 24a, 24b... Stopper, 26a, 26b... Guide pole, 2
8a, 28b...slide body, 29a, 29b...
...Transportation means, 30a, 30b...Guidance wall, 32
a, 32b...plate spring, 34...square hole, 36...
Sprocket, 38...Tape cassette, 40...
...Magnetic tape, 48a, 48b...Adjustment wall.

Claims (1)

[Scope of Claims] 1. A first position for allowing a magnetic tape housed in a tape cassette mounted at a predetermined location to be pulled out from the tape cassette, and for causing the magnetic tape to perform at least one of recording and reproduction. a tape drawer/tape running guide guide pole disposed so as to be movable between a second position associated with the transducer portion of the transducer unit; and a guide pole movable so as to stop the guide pole at the second position and a moving means for moving the guide pole from the first position to a second position and from the second position to the first position, and the moving means is slidable in the longitudinal direction. and a moving member that supports the guide pole and is coupled to the elastic member so as to move in the length direction of the elastic member as the elastic member moves. , the moving means moves the band-shaped elastic member in the longitudinal direction for a predetermined period of time even after the guide pole is stopped moving by the stopping means, thereby buckling and deforming the guide pole. are configured to contact the stop means with a predetermined pressing force, and the guide poles are arranged on both sides of the transducer section to have first and second positions movable between the first position and the second position, respectively. The band-shaped elastic member is configured to include a second guide pole, and the band-shaped elastic member is configured to have first and second band-shaped elastic members disposed along the movement path thereof, corresponding to the first and second guide poles, respectively. The moving means is configured to include an elastic member, and the moving means connects a corresponding outer peripheral portion in the radial direction to the first and second elastic members in order to transmit rotational power from a drive source to the first and second band-shaped elastic members when necessary. and a rotary drive unit in connectable contact with a second band-shaped elastic member, and rotation of the rotary drive unit in one direction moves the first and second guide poles from the first position to the second position.
position, and the first and second guide poles are configured to be moved from the second position to the first position by rotation of the rotary drive unit in the other direction. tape loading device. 2. In the description of claim 1, the band-shaped elastic member of the moving means is slidably held by a wall-shaped guide member formed with a required gap on both sides of the band-shaped elastic member. The wall-shaped guide member is shaped and arranged according to a desired movement locus of the guide pole, and is configured to move the guide pole along the shape of the wall-shaped guide member. tape loading device. 3. In the statement of claim 1, in the relationship between the guide poles corresponding to the first and second band-shaped elastic members and the stopper that constitutes the stopping means with which each of the guide poles abuts. , when the pressing force of the guide pole on the take-up side against the stopper is _F1 , and the pressing force of the guide pole on the supply side against _the stopper is _F2 , _the first and second A tape loading device characterized in that at least one of a spring constant and a buckling amount of the band-shaped elastic member of No. 2 is set.