JPS58107B2 - tape cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Mizumoto relates to a tape cassette loading device suitable for application to, for example, a fixed head type image recording and reproducing device.

Fixed head type image recording and reproducing device (hereinafter referred to as fixed head type VT)
R) is a so-called fixed head that is fixed in the longitudinal direction of the tape and movable only in the width direction of the tape, while the endless tape runs at a high speed of several meters to tens of meters per second. , recording, and playback.

For this reason, the Endorse tape used in fixed head VTRs requires a considerably longer tape length per unit time than that used in rotary head VTRs.

In addition, in order to ensure stable high-speed running, a considerable amount of endless tape is secured that is not wound around the reel.
It is necessary to pass the tape between the capstan and the pinch roller, between the head and the tape guide, and through the tape reservoir.

Therefore, when converting an endless tape into a cassette in a fixed head VTR, the cassette must be very large in size if the tape running path is completely formed in advance.

In order to reduce the size of the cassette, the portion of the endless tape that is not wound on the reel is stored inside the cassette case when not in use, and is pulled out of the case only when in use. do it.

However, the cassette constructed as described above has the disadvantage that the operation is complicated because it must be manually loaded each time.

Furthermore, when operating manually, there is a risk of touching the tape recording surface with one's hands.

The present invention has been made in consideration of the above circumstances, and its purpose is to provide a tape cassette loading device that can reduce the size of the cassette and also allows for extremely simple loading operations.

The details of the present invention will be clarified below with reference to embodiments shown in the drawings.

FIG. 1 is a diagram showing an outline of an embodiment of the present invention, in which A is a main body of a tape running device, B is a cassette loading chamber provided in the main body, and C is a diagram for inserting a cassette into the cassette loading chamber as shown by the arrow. This is a tape cassette that can be loaded or unloaded by removing it.

With the tape cassette C loaded in the cassette loading chamber B, the tape transport device main body A is operated to record an image by introducing an image signal from a recording signal forming section such as an imaging device, or to record an image in advance. For example, the image signal being displayed is led to a signal reproducing section E of a television receiver or the like, and the image is reproduced.

Figure 2 is a diagram showing the outline of tape cassette C. Case 1
A groove 2 is provided on the upper side of the slide plate 3 along which the slide plate 3 can slide in the direction of the arrow.

An arm 4 is attached to the tip of the slide plate 3,
Guide pins 5a and 5b are implanted at both ends of this arm 40, respectively.

The guide pins 5a and 5b are used to pull out the endless tape 6 inside the case 1 to the outside of the case when the slide plate 3 is slid to the right in the figure.

Note that 7 is a lid that normally closes the opening on the front of the case, and when the slide plate 3 is slid as shown in the figure, the protruding ends 4a protrude forward from both ends of the arm 40.
, 4b.

However, the above tape cassette C is case 1 when not in use.
It is reduced to the length L of the case 1 when used, that is, when loaded.
The length L + 1 is the sum of the length L and the amount of movement 1 of the slide plate 3.
It extends to

FIG. 3 is a top view when the tape cassette C is loaded into the cassette loading chamber B of the main body A of the tape traveling device and the main body A is put into operation.

In FIG. 3, the capstan 11 is rotated at high speed by a motor fixed to the underside of the base plate 12 as shown by the arrow.

A pair of pinch rollers 13a and 13b each have a shaft 14a.
, 14b are rotatably provided at one end of pinch roller holding mechanisms 15a and 15b.

A pair of head facing guides 16a, 16b are provided at the other ends of the pinch roller holding mechanisms 15a, 15b.

Therefore, the pinch roller holding mechanisms 15a and 15b are
When pulled by wires 18a and 18b with springs 17a and 17b interposed in the middle, the holding mechanisms 15a and 15b rotate and pinch rollers 13a and 13b are pulled.
comes into pressure contact with the capstan 11, and the head opposing guides 16a, 16b approach the fixed head 19.

Note that the above wire 18a. The winding operation of 18b is performed by rotating the operating lever of the pinch roller setting mechanism 20.

Furthermore, the rotation range of the pinch roller holding mechanisms 15a, 15b is limited to a pair of stoppers 21a, 21b fixed to the base plate 12.
regulated by.

However, the pinch rollers 13a and 13b are connected to the capstan 1.
When the endless tape 22 is pressed into contact with the tape 1 and rotated, the endless tape 22, which has been inserted in advance into the tape running path, starts running, and the head 19 records and reproduces image signals.

The endless tape 22 runs as follows.

In other words, the tape that is rotatably provided in the tape cassette C or is pulled out diagonally from the innermost circumference of the endless tape winding section wound around the loop 23 is drawn out diagonally with respect to the substrate 12 in the cassette C. Planted guide pole 2
4 and 25, it is returned to a state perpendicular to the substrate 12.

This tape 22 is introduced between the capstan 11 and the pinch roller 13b with its height position from the surface of the substrate 12 being regulated by a guide pin 26 provided on the pinch roller 15b.

The tape 22 that has passed between the capstan 11 and the pinch roller 13b passes between the head facing guides 16b and 16a and the head 19, and is introduced between the capstan 11 and another pinch roller 13a.

The tape 22 that has passed between the capstan 11 and the pinch roller 13a is temporarily stored in a tape storage section 30 surrounded by guide plates 27, 28, and 29, and then guided to a guide pole 31 in the cassette C. The endless tape is wound around the outermost circumference of the endless tape winding section.

By the way, the mechanism for sliding the slide plate 3 in order to insert the endless tape 22 of the tape cassette C into the tape running path when it is loaded in the tape running device main body A is as shown in FIGS. 4a and 4b. It is configured.

In FIGS. 4a and 4b, a frame 41 constitutes a cassette loading chamber B, and the upper wall of this frame 41 has a pair of gutter-shaped sliding parts 42a.

42b is formed.

This sliding portion 42a. 42b each has a slit 43
a, 43b are provided, and these slits 43a, 43b are provided.
3b, first and second sliders 44a and 44b are slidably provided.

45 and 46 are fasteners for attaching the slider to the slit.

By the way, one slider (second slider) 44b has a fifth slider.
As shown in Figures a and b, a protruding piece 47 is provided.

An engaging pawl 48 is provided at a position closer to the cassette insertion opening than the position where the protruding piece 47 is provided.

This engaging claw 48 is provided so as to be able to rise and fall freely with respect to the slider 44b.

However, it is always kept in a clockwise rotated state by a spring (not shown).

A sliding contact plate 49 that slides into contact with the operating end of the engagement claw 48 is provided on the lower surface of the gutter-shaped sliding portion 42b on the same side sandwiching the slit 43.

A slit 52 provided at the tip of the lever 50 is engaged with the upper end of the one stopper 45 .

The base end of the lever 50 is fixed to a fan-shaped gear 53.

This gear 53 is pivotally supported by a front slider (first slider) 44a, and its teeth mesh with the teeth of a rack mechanism 55.

When the slider 44a slides while being pushed by the cassette C, the gear 53 rotates, the lever 50 rotates as shown by the broken line, and the second slider 44b also slides accordingly. do.

Next, the operation when the cassette C is inserted into the cassette loading chamber is shown in FIGS. 5a and 5b.

That is, when the cassette C is inserted from the left side in the figure and pushed to a predetermined position, the front end of the protrusion 3a of the slide plate 3 in the cassette C comes into contact with the protrusion 47 on the slider 44b, as shown in FIG. 5a. .

Then, when the cassette C is further pushed in, the slider 44b is pushed by the cassette C and starts sliding.

When the slider 44b moves from the first area to the second area, that is, when the engaging claw 48 moves further back than the end 49a of the sliding plate 49, the operating end of the engaging claw 48 48a is pressed downward by the surface of the sliding plate 49, the engaging pawl 48 stands up as shown in FIG. 5, and presses the rear end of the protrusion 3a of the slide plate 3.

That is, the engaging claw 48 engages with the protrusion 3a.

In this state, the slider 44a slides (
This occurs when the cassette C is pushed in.

) When the lever 50 rotates, the slider 44b slides along the slider 43b, and along with this, the slide plate 3
As the cassette C slides, the endless tape in the cassette C is pulled out of the case and inserted into the tape running path.

When the lever 50 returns to its original position, the slide plate 3 also returns to its original position.

When the engaging element 48 moves to the left from the first region, that is, the end of the sliding contact plate 49, the engaging element 48 returns to its original state, that is, rotates clockwise to release the engagement, so that the cassette C can be pulled out as it is.

An engaging element having the same structure as the engaging element 48 shown in FIGS. 5a and 5b is also provided on the slider 44a.

As explained above, according to the present invention, by simply pushing the cassette into the cassette loading chamber of the main body of the tape transport device,
A slide plate for pulling out the tape provided on the cassette and a mechanical part that slides the slide plate are engaged,
Conversely, since the engagement is naturally released by pulling out the cassette, the handling operation becomes extremely simple.

Moreover, the cassette itself can be made compact when not in use by sliding the slide plate, which is convenient.

As described above, according to the present invention, it is possible to provide a tape cassette loading device which has various advantages and is extremely suitable when applied to fixed head type VTRs and the like.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an outline of an embodiment of the present invention, Fig. 2 is a top view of a tape cassette of the same embodiment, Fig. 3 is a top view showing the cassette loading state of the same embodiment, and Fig. 4a. , b are top and side views showing the configuration of the loading chamber of the same embodiment, Figures 5a and b
is an explanatory diagram of the operation of the same embodiment. A... Tape running device main body, B... Cassette loading chamber, C
... Tape cassette, 3 ... Slide plate, 6 ... Endless tape, 44 ... Slider, 48 ... Engagement claw.

Claims (1)

[Claims] 1. A tape cassette in which an endless tape is wound onto a reel and stored in a case, a cassette loading chamber provided in the main body of the tape running device so that the tape cassette can be loaded, and the above-mentioned A rotating body including a first slider that moves when being pushed by the tape cassette when loading the tape cassette, and a rotating body that changes the rotation angle according to the amount of movement of the first slider. A slidable membrane is connected to the cassette loading chamber so as to be coupled to the rotating part so as to slide with a movement amount larger than the movement amount of the first slider as the rotating body rotates; When loading a tape cassette, before the first slider is pushed by the tape cassette, a second slider is moved by being pushed by the tape cassette.
A slider is attached to the 20th slider so as to be able to rise and fall freely, and when the tape cassette is loaded, the second slider is pushed by the tape cassette, so that the first slider is an engager that stands up before being pushed by the tape cassette and engages with a slide plate slidably provided on the tape cassette; and a slide plate that interlocks with a second slider via the engager. A tape cassette loading device comprising a guide provided at the tip of the tape cassette for pulling out the endless tape that is not wound on the reel in the tape cassette to the outside of the cassette and inserting it into a tape running path.