JPS6267762A - Tape loading mechanism - Google Patents

Abstract

PURPOSE:To decrease sufficiently the load at the time of tape loading and to absorb satisfactorily the increase in the tape tension during the traveling by engaging a tape guide means rotatably in the opposite direction with the driving means through a floating linking pin. CONSTITUTION:The mechanism is equipped with a tape pulling-out means 30 to shift the outside of a rotary head cylinder 1, a tape guide means 31 to be supported savably from the action position on a shifting channel 17 of the tape pulling-out means 30, a driving means 40 to be arranged in a crossing shape to the tap guide means 31, supported turnably, and linked with a pin floatably in the crossing part and an energizing means 50 to energize the driving means 40 in the action position direction and the tape guide means 31 in the save position direction respectivley. Thus, the save of the tape guide means at the time of the tape loading can be very easily saved and the mechanism can sufficiently cope with the tape tension during the traveling.

Description

[Detailed Description of the Invention] [Industrial Application Field] The unreleased IJ1 is used in, for example, a video tape recorder (VTR).
The present invention relates to a tape loading mechanism in a magnetic recording/reproducing device such as the above.

[Conventional technology]

A conventional mechanism of this type is 1, for example, Japanese Patent Application Laid-Open No. 59-17
There is one as shown in Japanese Patent No. 1070. this is,
It is designed to meet the demand for miniaturization of magnetic recording devices, and has a tape running system as shown in FIG. 4. In FIG. , 2 to 12 are posts supporting the tape T, 13 is an erasing head, 14 is a capstan,
Reference numeral 15 designates a pinch roller that moves the tape T at a constant speed in cooperation with the capstan 14. Reference numeral 16 designates a tape cassette having a supply reel 16a and a take-up reel 16b. In the unloading state immediately after loading the tape cassette 16 into the device, each post 3.5, 6, 7, 8.10 and the pinch roller 15 are inside the tape T1 stretched on the front surface of the tape cassette 16, That is, it is located inside the cassette opening tSC.

When tape loading begins, post 5.6 will be marked with an arrow (
As shown in (a), the posts 7 and 8 move simultaneously as shown in the arrow (b), thereby causing the tape T to be wound with a tape force from (set) 16 to the rotating head cylinder 1. The tension post 3 moves as shown by the arrow (c), the post 10 and the pinch roller 15 move as shown by the arrow (d), and tape loading is completed.

FIG. 5 is a diagram showing a specific example of the main part of the tape loading mechanism that performs the above-described tape loading, particularly on the supply reel 16a side. That is, the loading movement path of the posts 5 and 6 shown by the arrow (A) in FIG. 4 is formed by a slide guide 18 provided with a guide groove 17. These posts 5.6 are erected on the moving table 19,
When loading the tape, it is driven by a drive device (not shown) to pull out the tape T from the tape force set 16 while sliding on the slide guide 1B.On the other hand, the erasing head 13 and the guide post 4 are driven by a supporting shaft. It is disposed at a position (operating position) on the guide groove 17, which is a movement path, via an arm 22 which is swingably supported by a spring 20 and biased by a spring 21.

Note that 23 is a fixed end of the spring 21, and 24 is a regulating pin of the arm 22. With this arrangement, space can be saved. During the tape loading process, the movable table 19 moves while pushing the arm 22 above the one operating position to the retracted position against the biasing force of the spring 21.

[Problem that the invention seeks to solve]

However, the conventional tape loading mechanism described above is
Since the rotatable arm 22 on which the erasing head 13 and the post 4 are erected is configured to counteract the tape tension only by the biasing force of the spring 21 in the operating position, for example,
When running in a running mode where the tape tension near the eraser pad 13 and post 4 is particularly high, such as during "reverse playback", the spring 2
1 succumbed to the tension, causing the arm 22 to rotate toward the retracted position and escape. However, to solve this problem, if the biasing force of the spring 21 is increased,
In that case, the loading power load for pushing the arm 21 away during the tape loading process becomes large, leading to an increase in the size of the drive source and power consumption.

The present invention has been made in view of the above-mentioned contradictory problems of the conventional art, and its purpose is to sufficiently reduce the load during tape loading and to satisfactorily absorb increases in tape tension during running. to provide a possible tape loading mechanism.

[Means for solving problems]

To achieve the above objects, the present invention includes: a tape pull-out means that moves outside a rotary head cylinder; a tape guide means that is pivotably supported to be retractable from a working position on a movement path of the tape pull-out means; The guide means includes a drive means disposed in an intersecting manner and rotatably supported by a shaft and pin-coupled so as to be movable at the intersecting portion thereof, and the drive means is moved in the direction of the operating position and the tape guide means is retracted. The tape loading mechanism is characterized in that it includes biasing means that bias the tape in the positional direction.

[Effect]

During the tape loading process, the first stage of tape drawer pushes the drive means away to the retracted position against the urging force of the urging means. The drive means rotates the tape guide means to the retracted position via a loose connection. While the loaded tape is running, a rotational force in the direction of the retracted position based on the tape tension is applied to the tape guide means, and the driving means is linked to the tape guide means via a loose coupling and an urging means. Therefore, rotation to the retracted position is easily prevented.

〔Example〕

1 to 3 show embodiments of the present invention. The feeding unit 30 as a tape drawing unit is formed by erecting guide posts 5 and 6 on a moving table 19 driven by a drive device (not shown) as in the conventional case, and a guide groove 17 as a moving path. The rotary head moves outside the cylinder l, guided by the rotary head one by one. 31 is a tape guide arm as a tape guide means, 32 is an arm body to which an erasing head 13 and a guide post 4 are attached to the free end side, 33 is a rotating wheel of this body 32, and 34 is provided on the body 32. The spring movable locking pin 35 is an elongated hole formed by cutting out a part of the main body 32. Reference numeral 40 denotes a drive lever as a drive means for the tape guide arm 31, 41 is a hook-shaped lever main body, 42 is a lever for freely supporting the main body 41 at the bent portion, and 43 is a lever main body 41. A spring locking groove 44 formed at one end of the main body 41 is configured to fit into the elongated hole 35 of the tape guide arm 31 in a movable manner.
1: This is a driving bin installed vertically. This drive pin 4
4 and the elongated hole 35 form a so-called automatic return mechanism. Reference numeral 50 denotes a tension coil spring as a biasing means, and the i+i moving latch tL for the spring is installed upright on the tape guide arm 31.
It is stretched between the pin 34 and a spring engagement toy 43 provided on the drive lever 40.

The tape guide arm 31 is biased toward the retracted position, and the drive lever 40 is biased toward the active position while being elastically linked.

Next, the action will be explained.

In the tape unloading state shown in FIG.
is in an operating position located approximately above the guide groove 17.

When tape loading is started, the loading unit 30 pulls out the tape T from the tape cassette 16 while moving along the guide groove 17 in the direction of arrow (A). Main body 4
1 and a spring 50 around the vehicle 42.
Rotate clockwise as shown in the figure against the force of. Then, the drive lever 44 vertically installed on the drive lever main body 41 presses the tape guide arm 31 in the direction of the arrow (E) through its fitting elongated hole 35, and moves the arm main body 32 counterclockwise around the vehicle 33. Rotate it. This rotation is facilitated by the tension of the spring 50. As a result, the erasing head 13 and guide post 4 can be moved to the retracted position shown in FIG. 2 very easily. When the tape loading progresses further and the loading unit 30 separates from the drive lever main body 41, the drive lever 40 rotates counterclockwise by the restoring force of the spring 50, that is, toward the operating position.

Along with this rotation, the drive lever 40 presses the side surface of the elongated hole 35 in the direction of the arrow opposite to the above through the drive pin 44, and moves the tape guide arm body 32 clockwise, that is, toward the operating position. Rotate. In this way, the so-called automatic return mechanism returns the door 13 and the guide post 4 to their working positions as shown in FIG. In the middle of loading, the tension bin 3 moves in the direction of arrow (c) (FIG. 2) slightly behind the loading unit 30, as in the conventional case, and applies tension to the tape T.

When the tape loading is completed and the tape T is run, the tape guide arm 31 is moved counterclockwise (
Even if the acting force to rotate the lever toward the retracted position (in the direction of the retracted position) increases, the drive lever 4° becomes a locking member via the drive pin 44 that engages with the elongated hole 35 and its slope, and the tension of the spring 50 Without.

Escape of the erasing head F 13 and the guide post 4 due to an increase in tape tension can be effectively prevented. Thereby, a weak spring 50 can be used.

In the above embodiment, a loading unit is used as the tape drawing means, but the present invention is not limited to this, and the present invention is also applicable to a loading ring system. Furthermore, although the case has been described in which the tape guide arm is provided with an erasing head and a guide post, the present invention can also be applied to an arrangement in which only one of them is provided.

In addition, although the spring 50 that biases the tape guide arm 31 and the drive lever 40 is shown as a spring that is commonly used to bias the tape guide arm 31 and the drive lever 40 (FIG. 1, solid line), it is not limited to stiffness, and the chassis L
A configuration may also be adopted in which a locking pin is implanted in and the two springs 50a and 50b shown in broken lines in FIG. 1 are biased separately.

〔Effect of the invention〕

As explained above, the tape guide means has a simple structure in which the tape guide means is engaged with the drive means through the free coupling pin so as to be able to rotate in opposite directions to each other, and both means are linked by the biasing means. The tape guide means can be retracted very easily, and the tape tension during running can be sufficiently counterbalanced.

[Brief explanation of drawings]

1 to 3 are plan views schematically showing the configuration of essential parts of an embodiment according to the present invention, in which FIG. 1 shows the state immediately before loading, FIG. Each indicates the end of loading. FIG. 4 is a schematic plan view showing a tape running path in a conventional tape loading mechanism, and FIG. 5 is a schematic plan view of a specific example of the main part of FIG. 4. l is a rotating head cylinder, 17 is a moving path (guide groove)
, 30 is a tape drawing unit (loading unit);
31 is a tape guide means (tape guide arm); 40
50 is a driving means (drive lever), and 50 is a biasing means (spring). In each figure, the same reference numerals represent the same or corresponding parts. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A tape pull-out means that moves outside the rotary head cylinder, a tape guide means that is pivotally supported so as to be retractable from an operating position on a movement path of the tape pull-out means, and the tape guide means are arranged in a cross-shape. a driving means rotatably supported on a shaft and movably connected at an intersection thereof; and urging means for urging the driving means toward the operating position and urging the tape guide means toward the retracted position. A tape loading mechanism characterized by: