JP2571399B2 - Magnetic recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to an improvement in a loading mechanism in which a slider holding a pin moves to draw a magnetic tape from a cassette to form a tape path. Things.

[Conventional technology]

3 to 6 show an example of the configuration of a tape running system of a conventional cassette type VTR, FIG. 3 is a plan view showing a state where the slider is at a cassette position, and FIG. 4 is a line IV in FIG. −
IV is a sectional view, FIG. 5 is a plan view showing a state where the slider is at the set position, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

In the figure, (1) is a magnetic tape supply reel, (2)
Is a magnetic tape take-up reel, and the supply reel (1) and the take-up reel (2) are loaded in parallel to the cassette case (3). (4) is a magnetic tape, (5) is a rotating drum having a built-in magnetic head, (6) and (7) are pull-out pins for pulling out the magnetic tape (4) from the cassette case (3), and (8) is a pinch. Roller, (9) capstan, (10) and (11) fixing pins, (12)-(1
5) is a pin held by the first slider (18) and the second slider (19), (16) is an erase head, and (17) is a tension pin.

Reference numeral (20) denotes a ring for transmitting a driving force from a motor (not shown), and the sliders (18) and (19) are connected to a connecting rod (2).
They are rotatably connected at (1) and (22). Further, the sliders (18) and (19) are attached so as to hold the slider guides (23) and (24) for regulating the trajectory when moving from the cassette position in FIG. 3 to the set position in FIG.

Next, the operation will be described. 3 and 4, when the driving force from the motor is transmitted and the ring (20) rotates, the slider (1) connected by the connecting rods (21) and (22) is rotated.
8) and (19) are slider guides (23) and (24) respectively
Starts moving from the cassette position to the set position on the trajectory formed by. At about the same time, the pins (6) and (7) are removed from the cassette (3) to the magnetic tape (4).
The magnetic tape (4) is wound around the rotating drum (5) as the sliders (18) and (19) advance along the trajectories of the slider guides (23) and (24), thereby forming a tape path. I do. Further, the tension pin (17) is set, and the pinch roller (8) is also pulled out from the cassette position in synchronization with the pull-out pin (7), so that the tape loading is completed as shown in FIG.

[Problems to be solved by the invention]

Since the conventional magnetic recording / reproducing apparatus is configured as described above, a predetermined distance is required between the first slider (18) and the second slider (19) at the final set position shown in FIG. In the cassette position shown in FIG. 3, the sliders (18) and (19) cannot be simultaneously accommodated in the area (A) surrounded by the cassette case (3) and the magnetic tape (4). The second slider (19) must stand by outside the area (A) as shown in FIG. For this purpose, the second slider (19) is a magnetic tape (4).
In order to make this possible, the slider guides (23) and (24) are provided with steps as shown in FIG. 3 so that the slider (19) passes below the magnetic tape (4). I was For this reason, a large height is required and a slider guide is required to be long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a height dimension and a slider by simultaneously storing each slider at a cassette position in a region surrounded by a cassette case and a magnetic tape. It is an object of the present invention to provide a magnetic recording / reproducing apparatus capable of shortening a guide and reducing the size of the apparatus.

[Means for solving the problem]

A magnetic recording / reproducing apparatus according to the present invention comprises a pin for pulling out a magnetic tape from a cassette, at least two sliders for moving the pin along the circumferential direction of the rotary drum, and A common slider guide that sequentially guides the sliders in the circumferential direction, and a ring that rotates to drive each of the sliders. Each of the sliders is driven by the ring to move from the cassette position to the set position along the slider guide. In the magnetic recording and reproducing apparatus, the magnetic tape is moved from the set position to the cassette position to move the magnetic tape away from the rotary drum. A connecting member connected to a slider positioned forward on the slider guide with respect to the winding direction; The slider guide is supported so as to be movable in the width direction, and is biased and held so as to face the winding direction. After the ring rotates only a predetermined angle with respect to the winding direction, the slider A push lever is provided to directly contact a rear portion of a slider located on the rear of the guide, and the slider located on the rear is pushed by the push lever from the rear with the push lever, and a slider located on the front with the rotation of the ring. The slider is moved in the winding direction along the slider guide while maintaining an interval, and is pushed back by the slider located forward in the direction away from the slider guide.

[Action]

According to the present invention, the push lever is used to push the slider located on the rear of the slider guide from the rear to move the slider to the final set position, thereby appropriately setting the direct contact timing between the push lever and the slider. By doing so, it is possible to automatically set and maintain a predetermined distance between the slider located at the front and the slider located at the rear, and to push back the slider located at the rear with the slider located at the front to position the cassette. Then, they can be housed in a compact manner by making them close to each other.

(Example of the invention)

An embodiment of the present invention will be described below with reference to FIGS. Since the configuration and operation of the tape running system of the cassette type VTR are almost the same as those of the conventional apparatus described with reference to FIGS. 3 to 6, the same reference numerals are given and the description thereof will be omitted, and only different points will be described. In the figure, the first slider (18) is rotatably connected to the ring (20) by a connecting rod (21), but the second slider (19) is not directly connected to the ring (20). Instead, the ring (20)
Push lever (25) with pin (26) planted at the tip
Is located at a predetermined distance from the second slider (19),
It is installed rotatably, and is configured to be pressed against the wall of the slider guide (24) by a spring (27).

Next, the operation will be described. First, when the ring (20) starts rotating from the state of the cassette position shown in FIG.
The magnetic tape (4) is pulled out from the cassette case (3) by the pull-out pins (6) and (7) and the first slider (18). However, the second slider (19) has a ring (20)
Because it is not directly connected to the camera, it stands by at the cassette position even if the ring (20) rotates. Eventually, when the first slider (18) and the second slider (19) are separated from each other by a distance equivalent to the final set state, the pin (26) of the push lever (25) set on the ring (20) waits. Second
The second slider (1
9) is pushed along the trajectory of the slider guides (23) and (24) to reach the final set position. At this time, naturally, the first slider (18) is also at the final set position at the same time.

Next, at the time of unloading, the ring (20) rotates in the reverse direction, and even if the first slider (18) and the push lever (25) are unloaded, the second slider (19) waits at the final set position. The slider (18) is pushed back to the cassette position, and stops at the protrusion (24a) provided at the end of the slider guide.

In the above embodiment, the case where the number of the sliders is two has been described.

〔The invention's effect〕

As described above, according to the present invention, in the direction in which the magnetic tape is wound around the rotating drum, the push lever that moves by receiving the driving force from the ring and the slider that is located rearward on the slider guide are directly connected. Instead, after the ring rotates a predetermined angle, the push lever directly contacts the slider located at the rear, and then the slider located at the rear is pushed from the rear with the rotation of the ring and moved along the slider guide, Even at the final position, positioning can be automatically performed at a predetermined interval between the slide and the slide located ahead.

Further, in the direction in which the magnetic tape is separated from the rotary drum, the slider located at the front comes into contact with the slider located at the rear with the rotation of the ring, and returns to the cassette position while pushing it back. In this case, the two sliders are located very close to each other and are stored as they are. Further, there is no need to provide a special means for restricting the attitude of the slider in the slider guide. Becomes easier,
The present invention has excellent effects.

[Brief description of the drawings]

FIG. 1 is a plan view showing a magnetic recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 4 is a plan view showing a conventional magnetic recording / reproducing apparatus, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a plan view showing a state where the slider is at a set position, and FIG. Line VI-VI in Figure 5
FIG. In the figure, (3) is a cassette case, (4) is a magnetic tape, (5) is a rotating drum, (18) and (19) are sliders, (23) and (24) are slider guides, and (20) is a ring. It is. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] 1. At least two sliders for holding a pin for pulling out a magnetic tape from a cassette and moving the pin along the circumferential direction of the rotary drum, and sequentially moving each of the sliders in the circumferential direction of the rotary drum. A common slider guide that guides each slider, and a ring that rotates to drive each of the sliders. Each of the sliders is driven by the ring and moves from a cassette position to a set position along the slider guide to move magnetically. In the magnetic recording / reproducing apparatus, a tape is wound around the rotating drum, and the magnetic tape is moved from the set position to the cassette position to separate the magnetic tape from the rotating drum. A connecting member connected to a slider located forward on the slider guide; After the ring is rotated by a predetermined angle only with respect to the winding direction, it is supported on the slider guide. Is provided with a push lever that directly contacts the rear portion of the slider, and the slider located at the rear is pushed from behind by the push lever with the rotation of the ring while maintaining a distance from the slider located at the front. A magnetic recording / reproducing apparatus, wherein the slider is moved in the winding direction along the slider guide, and is pushed back by the slider positioned forward in the direction away from the magnetic recording / reproducing apparatus.