JPH0887792A - Tape loading device - Google Patents

Abstract

PURPOSE: To perform operating control with high accuracy by drawing out a magnetic tape by means of a link mechanism via a driving means and executing loading and unloading the tape around a drum. CONSTITUTION: When the tape loading operation is started, a take-up driving gear 17b is driven to rotate counterclockwise by a driving source. Then, 2nd link members 19a and 19b are synchronized with a supply driving gear 17a and the take-up driving gear 17b and are turned and energized. Now, the tape loading operation for drawing out the magnetic tape of a cassette to be mounted on a 1st chassis 13 via 1st link members 18a and 18b and the 2nd link members 19a and 19b and stretching the tape around the drum 10 is executed by tape drawing members 20a and 20b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus such as a video tape recorder (VTR), and more particularly to a tape loading apparatus for pulling out a magnetic tape of a cassette and mounting it on a drum.

[0002]

2. Description of the Related Art Recently, in a VTR, when a magnetic tape wound around a cassette is mounted around a drum on which a rotary head is mounted, the cassette is moved with respect to the drum so that the so-called drum is mounted on the cassette. A miniaturized product has been developed, which is configured to bite into the opening.

By the way, in such a VTR, when a cassette is loaded, a tape loading mechanism is used to tape-load the magnetic tape of the cassette, and a cassette slide mechanism is used to move the cassette to open it. Two different movements are performed that bit the drum into the section. Therefore, in such a VTR, two different operations are associated and controlled by simultaneously controlling the driving force of one driving source using the cam gear for the tape loading mechanism and the tape slide mechanism. To be done.

However, in the VTR, since the tape loading mechanism and the cassette slide mechanism are independently controlled by using the cam gear, the cassette slide mechanism must be provided in addition to the conventional tape loading mechanism. In addition, the number of components is very large,
Configuration becomes complicated. Further, according to this, since it is necessary to associate two different operations with each other to control the operations, there is a problem that handling including the design is very troublesome.

[0005]

As described above, the conventional tape loading device has a problem that the number of constituent parts is increased and the structure is complicated because the number of mechanisms is increased. The present invention has been made in view of the above circumstances, can simplify the configuration, reduce the number of parts, and
An object of the present invention is to provide a tape loading device capable of realizing highly reliable and highly accurate operation control.

[0006]

According to the present invention, there is provided a first chassis in which a drum on which a rotary head is mounted is arranged, and a combination of the first chassis and the first chassis so as to be movable relative to the first chassis. And a second chassis to which the cassette is mounted and one end of which is movably supported by the first chassis, and the magnetic tape of the cassette is pulled out to the other end and mounted around the drum. The first and second link mechanisms provided with a tape pull-out member and the first and second link mechanisms are synchronously driven and controlled so that the tape pull-out member moves the magnetic tape of the cassette around the drum. A drive unit for executing a tape loading to be mounted and a tape unloading to be detached from the periphery of the drum; and a drive unit provided on the second chassis, wherein the first or second drive unit is provided. Some of the link mechanism is engaged, the first
Also, the tape loading device is configured to include the cam mechanism that relatively moves the second chassis and the first chassis in association with the operation of the second link mechanism.

[0007]

According to the above structure, when the first and second link mechanisms are driven and controlled by the drive means, the tape pull-out member pulls out the magnetic tape of the cassette and loads the tape around the drum. Perform tape unloading. At the same time, the first and second link mechanisms drive the cam means to move the second chassis with respect to the first chassis and bite the drum into the opening of the cassette. As a result, the cassette slide operation is performed in association with the tape loading and tape unloading operations, the component parts thereof can be shared, and the configuration can be simplified by reducing the component parts.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a tape loading device according to an embodiment of the present invention, in which a drum 10 on which a rotary head is mounted is arranged on a first chassis 11. The first chassis 11 includes a slide guide portion 1
2 are provided with a predetermined interval. The slide guide portion 12 has a second chassis 1 which constitutes a cassette holder.
The guide hole 14 provided in the housing 3 is housed movably in the directions of arrows A and B. As shown in FIG. 2, the cassette 16 on which the magnetic tape 15 is wound is attached to and detached from the second chassis 13.

Supplying and winding drive gears 17a and 17b are rotatably meshed with the first chassis 11, and the winding drive gear 17b has a driving force from a motor (not shown). Is transmitted. Then, one ends of the first link members 18a and 18b for the supply and winding sides are supported on the rotation shafts of the supply and winding drive gears 17a and 17b, respectively. The other end of each of the first link members 18a and 18b is provided with a second link member 19a for supplying and winding.
One end of 19b is linked and the other end of these second link members 19a and 19b is respectively linked to the tape pull-out members 20a and 20b for supplying and winding sides. These tape pull-out members 20a and 20b are movably accommodated and supported in supply and take-up guide grooves 21a and 21b formed on the supply side and the take-up side of the drum 10 of the first chassis 11, respectively. The tape 15 is pulled out and mounted around the drum 10 in a predetermined state.

The supply drive gear 17a is provided with a first cam drive section 22. Then, the second cam drive unit 23 is provided at the other end of the supply first link member 18a.

One end of a pinch lever 25 is linked to the second link member 19b for winding, and a pinch roller 26 is rotatably supported at the other end of the pinch lever 25. The other end of the pinch lever 25 is movably accommodated and supported in a pinch roller guide groove 27 formed in the first chassis 11.

A tension post 28 and a guide roller 29 are movably arranged on the first chassis 11 via a moving mechanism (not shown). The tension post 28 and the guide roller 29 are operationally controlled in conjunction with the movement of the tape pull-out members 20a and 20b, and are moved to a predetermined position on the tape path.

The second chassis 13 has a notch 1
3a is formed corresponding to the opening 16a of the cassette (see FIGS. 2 and 3), and one side for driving the cassette slide is provided on one side corresponding to the tape supply side of the edge of the notch 13a. And second cams 30a and 30b are provided.
The first and second cams 30a and 30b have the above-mentioned first
The second and the second cam drive units 22 and 23 are detachably engaged, and the first and the second cam drive units 22 and 23 are always engaged with either one of them. That is, the second cam 30
The second cam drive portion 23 is engaged with the position b at the tape loading start position (tape unloading end position) and is disengaged during the tape loading operation (during the tape unloading operation). First cam 3
0a is engaged with the first cam drive unit 22 during the tape loading operation (during the tape unloading operation), and the second cam drive unit 23b is disengaged from the second cam 30b and engaged. Second chassis 13
Secure the tape loading end position (tape unloading start position).

In the above structure, when the tape loading is started (tape unloading is completed), the second cam drive unit 23 causes the second cam 30b of the second chassis 13 to operate.
, And the second chassis 13 takes the tape loading start position (tape unloading end position) shown in FIG.

When the tape loading operation is started and the winding drive gear 17b is rotationally driven in the counterclockwise direction in the figure by the drive source (not shown), the supply drive gear 17a is rotated along with the rotation. It is driven to rotate clockwise in the figure. Then, the first link members 18a, 18b and the second link members 18a, 18b
The link members 19a and 19b are rotationally biased in synchronization by the supply and take-up drive gears 17a and 17b. Here, the tape pull-out members 20a, 20b are the first link members 18a, 18b and the second link members 19a, 19b.
Supply and winding guide groove 2 of the first chassis 11 via b
The second chassis 1 is moved and guided along 1a and 21b.
The tape loading operation of pulling out the magnetic tape 15 of the cassette 16 mounted on the No. 3 and mounting it around the drum 10 is performed (see FIGS. 4 to 8).

At this time, the first link member 18a on the supply side
Drives the second cam 30b of the second chassis 13 with the second cam driving portion 23 to move the second chassis 13 in the direction of the arrow A into the opening 16a of the cassette 16 so that the first chassis 11 of the first chassis 11 moves. The drum 10 is moved (slide) so as to bite (see FIGS. 5 to 8). And the second chassis 1
3 is moved to a predetermined position, the second cam drive unit 2
3 is disengaged from the second cam 30b of the second chassis 13, and instead, the first cam drive unit 22 is engaged with the first cam 30a of the second chassis 13. Here, the tape pull-out members 20a and 20b are moved to predetermined positions in the supply and take-up guide grooves 21a and 21b as shown in FIG. 8, and the tape loading operation is completed. Link member 1
Interlocked with the tape loading operation of 9b, the pinch roller 26 is guided along the pinch roller guide groove 27 to press the pinch roller 26 against the capstan 31 via the magnetic tape 15.

Here, the tension post 28 and the guide roller 29 are moved to a predetermined position on the tape path in conjunction with the above-mentioned tape loading operation, and support the magnetic tape 15 so that the tape can run.

When tape unloading is performed at the tape loading end position shown in FIG. 8, the take-up drive gear 17b is reversely driven, and the supply drive gear 17a is rotated counterclockwise in FIG. Driven to rotate. Then, the first link members 18a and 18b and the second link members 19a and 19b are reversely biased in synchronization by the supply and winding drive gears 17a and 17b.
Here, the tape pull-out members 20a, 20b are the first link members 18a, 18b and the second link members 19a,
The magnetic tape 15 mounted around the drum 10 is reversely moved through the supply and winding guide grooves 21a and 21b of the first chassis 11 via 19b (FIGS. 8 to 4, (See FIG. 1).

At this time, the supply drive gear 17a has the first
Of the first cam 3 of the second chassis 13 by the cam drive unit 22 of
0a is driven to move (slide) the second chassis 13 in the direction of arrow B. Then, when the second chassis 13 is moved to a predetermined position, the first cam drive unit 22
Are disengaged from the first cam 30a of the second chassis 13, and instead, the second cam drive portion 23 of the first link member 18a causes the second cam 30 of the second chassis 13 to move.
The second chassis 13 is engaged with b and is moved to the tape unloading end position (tape loading start position) in the direction of arrow B (see FIGS. 8 to 4 and 1). Here, the tape pull-out members 20a and 20b are moved to predetermined positions in the supply and take-up guide grooves 21a and 21b as shown in FIG. 1, and the tape unloading operation is completed.

At the same time, the pinch lever 25 is guided by the pinch roller guide groove 27 and reversely moved in conjunction with the tape unloading operation of the first link member 17b, and the pinch roller 26 is separated from the capstan 31. To return to the initial position.

At this time, the tension post 28 and the guide roller 29 located on the tape path are returned to the initial position in association with the above-described tape unloading operation, and the magnetic tape 15 is placed in the cassette 16. Allow accommodation.

As described above, the tape loading device includes the first and second cams 30a and 30b in the cassette 16
Mounted on the second chassis 13 to be mounted, and corresponding to the first and second cams 30a and 30b, the first and second cam drive portions 22 and 23 are provided to the supply drive gear 17a of the tape loading mechanism and Provided on the first link member 18a,
Interlocking with the operation of the tape loading mechanism, the first and second cam driving portions 22 and 23 of the first and second cams 3 and 3 operate.
0a, 30b are driven to move the second chassis 13 to move the cassette 16 of the second chassis 13.
The drum 10 of the first chassis 11 is configured to bite into the opening 16a.

According to this, by performing the slide operation of the cassette 16 in association with the tape loading and tape unloading operations by the tape loading mechanism, it becomes possible to use the constituent parts in common and reduce the constituent parts. Therefore, the configuration can be simplified.

Further, according to this, by performing the cassette slide operation in association with the tape loading and tape unloading operations, it is possible to easily realize an organic combination of both operation controls, and it is highly reliable. Operation control is easily realized.

In the above embodiment, the drive force from the drive source is transmitted to the winding drive gear 17b to supply the drive gear 17a.
However, the present invention is not limited to this, and the drive force from the drive source is first transmitted to the supply drive gear 17a and then the winding drive gear 18b. It may be configured to be transmitted to.

In the above embodiment, the tape loading mechanism has been described by using the two first and second link members 18a, 18b, 19a and 19b. However, various link structures are applicable. Further, as a tape loading drive system, supply and take-up drive gears 17a,
Although the description has been given of the case of being applied to the power transmission structure in which 17b is directly meshed with each other, the power transmission structure is not limited to this, and various power transmission structures may be formed.

Further, in the above embodiment, the case where the second chassis 13 is configured to be moved with respect to the first chassis 11 has been described, but the present invention is not limited to this, and the first chassis 11 can be moved to the second chassis. Of the first and second chassis 1 or
It is also possible that both 1 and 13 are moved so as to face each other.

In the above embodiment, the cam means is
Connect the first and second cams 30a and 30b to the second chassis 1
The third cutout 13a is formed only on the supply side of the cutout 13a. However, the present invention is not limited to this, and the cutout 13a of the second chassis 13 is arranged on both the supply side and the winding side. You may. As the cam means, it is also possible to use a single cam instead of dividing the first and second cams 30a and 30b into two as in the above embodiment.

Further, in the above embodiment, the first cam drive unit 22 is provided on the supply drive gear 17a, and the second cam drive unit 23 is provided on the other end of the first link member 18a. However, the first and second link members 18a on the supply side are not limited to this arrangement position.
By being provided in any one of 19a, it is substantially effective. Therefore, the present invention is not limited to the above embodiment,
In addition, it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0030]

As described above in detail, according to the present invention, the structure can be simplified, the number of parts can be reduced, and
It is possible to provide a tape loading device capable of realizing highly reliable and highly accurate operation control.

[Brief description of drawings]

FIG. 1 is a diagram showing a tape loading device according to an embodiment of the present invention.

FIG. 2 is a view showing a state in which a cassette is mounted on a second chassis.

FIG. 3 is a diagram showing a second chassis taken out.

FIG. 4 is a diagram showing a tape loading (tape unloading) operation state of FIG. 1;

FIG. 5 is a diagram showing a tape loading (tape unloading) operation state of FIG. 1;

FIG. 6 is a diagram showing a tape loading (tape unloading) operation state of FIG. 1;

FIG. 7 is a diagram showing a tape loading (tape unloading) operation state of FIG. 1;

FIG. 8 is a diagram showing the tape loading operation end state (tape unloading start position) of FIG. 1;

[Explanation of symbols]

 10 ... drums. 11 ... The first chassis. 12: Slide guide section. 13 ... Second chassis. 13 ... Notch. 14 ... Guidance department. 15 ... Magnetic tape. 16 ... Cassette. 16a ... Opening part. 17a, 17b ... Supply and winding drive gears. 18a, 18b ... 1st link member. 19a, 19b ... A second link member. 20a, 20b ... Tape pull-out member. 21a, 21b ... Supply and winding guide grooves. 22, 23 ... First and second cam drive units. 25 ... Pinch lever. 26 ... Pinch roller. 27 ... Pinch roller guide groove. 28 ... Tension post. 29 ... Guide roller. 30a, 30b ... First and second cams. 31 ... Capstan.

Claims (3)

[Claims] 1. A first chassis, on which a drum on which a rotary head is mounted, is disposed, and a first chassis, which are arranged so as to be relatively movable with respect to the first chassis, and in which a cassette is mounted. A second chassis having a second chassis and a tape pull-out member having one end movably supported by the first chassis and having the other end pulling out the magnetic tape of the cassette and mounting the magnetic tape around the drum. And a second link mechanism, and the first and second link mechanisms are synchronously driven and controlled, and the magnetic tape of the cassette is mounted around the drum by the tape pull-out member. Drive means for executing tape unloading for removing the tape from the surroundings, and a part of the first or second link mechanism engaged with the second chassis. , Tape loading device having a cam means for relatively moving the said second chassis first chassis in conjunction with the operation of the first and second link mechanisms. 2. The tape loading device according to claim 1, wherein the cam means has first and second cam portions formed corresponding to the first and second link mechanisms. 3. A pinch roller mechanism is mounted on one of the first and second link mechanisms corresponding to the take-up side, and the pinch roller interlocks with the operation of the one of the first and second link mechanisms via the magnetic tape of the cassette. 2. The tape loading device according to claim 1, wherein the tape loading device is configured to be brought into contact with and separated from the capstan.