JP2571945B2 - Cassette loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette loading device for accommodating a cassette having a tape-shaped storage medium and having a concave portion on a side from which the medium is drawn out in a fixed position. It is.

[Prior Art] FIG. 6 is a perspective view showing a magnetic recording / reproducing apparatus (hereinafter, referred to as VTR), particularly a conventional loading apparatus for a cassette used in a small 8 _mm VTR, and FIG. FIG. 3 is a schematic plan view for explaining a cassette to which the present invention is applied.

In FIG. 6, reference numeral 1 denotes an inner holder into which a cassette 6 to be described later is inserted. Reference numeral 2 denotes an outer holder that rotates the inner holder 1 and locks and holds the inner holder 1. 3a and 3b are pivot points of the inner holder 1, and 4a and 4b are pivot points of the outer holder 2. 5 is attached to the outer holder 2 and the inner holder 1
Is a leaf spring that presses the upper surface of the plate.

The outer holder 2 is rotatably supported by a support plate (not shown) projecting from a fixed chassis (not shown) via pivot points 4a and 4b. The inner holder 1 is slidably inserted in the outer holder 2 and is rotatable on a support plate (not shown) projecting from a slide chassis (not shown) slidably disposed on a fixed chassis. Are rotatably supported via pivot points 3a and 3b.

When the slide chassis is pulled toward the opposite side with respect to the drum 7, the rotation fulcrums 3a, 3b and 4a, 4b are located on the same axis, and the inner holder 1 and the outer holder 2 rotate integrally. You can do it. When the slide chassis is pushed into the drum 7, the support plates supporting the pivot points 3a and 3b move together, and the inner holder 1 moves inside the outer holder 2 toward the drum 7.

As shown in FIG. 7, the cassette 6 has a concave portion 8 on the side where the tape is pulled out, and the drum 7 is positioned so as to bite into the concave portion 8 when loading is completed. When the tape 9 is loaded, a post (not shown) and a capstan 32 move to the drum side to pull out the tape 9 and wind it around the drum 7.

In FIG. 6, when the cassette 6 shown in FIG. 7 is mounted on the holder, the slide chassis is pulled out, and the inner holder 1 and the outer holder 2 are rotated so that the cassette insertion opening faces upward. In this state, the cassette 6 is inserted into the inner holder 1 from the tape drawing surface side. Next, after returning the holder to the horizontal position (a position parallel to the slide chassis), the slide chassis is moved to the drum 7 side, the inner holder 1 is moved into the outer holder 2, and the drum 7 is moved as shown in FIG. The cassette 6 is moved until it is positioned. At this time, the rotation fulcrums 3a and 3b are located at a position closer to the drum side by a distance a from 4a and 4b.

As described above, the cassette is attached to and detached from the holder at a position away from the drum 7, the cassette is mounted on the cassette mounting portion, and then moved to the drum side. Since it can be in the state of being bitten, the size of the mechanism can be reduced.

[Problems to be Solved by the Invention] In the conventional cassette loading device as described above, both the inner holder and the outer holder have a pivot point, and when opened, all pivot points must be aligned on the same line. In addition, the inner holder needs to move to the set position, and there is a problem that the entire length of the loading mechanism increases. That is, the pivot points 3a and 3b need to be located at a position corresponding to the movement of the slide chassis in the opposite direction from the drum end side of the slide chassis, and the total length of the outer holder is smaller than the total length of the slide chassis. Because it has to be small,
The turning radius of the outer holder cannot be increased. For this reason, the rotation angle of the cassette holder becomes steep, making it difficult to attach and detach the cassette. In order to avoid this, there is a problem that the total length of the fixed chassis on which the slide chassis is mounted cannot be reduced. The occurrence of such a problem is caused by the fact that the outer holder and the inner holder have independent rotation fulcrums.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has as its object to provide a cassette loading device that has a single rotation fulcrum and can increase the slide amount while reducing the rotation angle of the cassette holder. Aim.

Means for Solving the Problems In order to achieve the above object, the present invention provides an inner holder on which a cassette accommodating a tape-shaped recording medium is mounted, and the inner holder is slidably fitted in the inner holder. A cassette holder comprising: an outer holder rotatably fixed to a chassis; and a forward / backward movement of the inner holder from a cassette insertion position to a loading completion position. An engaging member protruding from the chassis and a guide plate formed on a slide chassis slidably disposed on the chassis,
A guide groove for guiding the engaging member in accordance with the rotation of the cassette holder, and the inner holder after the cassette descends is reciprocated in accordance with a sliding operation of the slide chassis.

[Operation] With the configuration described above, the inner holder loosely fitted to the outer holder rotates about the fulcrum of the outer holder, and the pin of the inner holder is inserted into the guide groove provided in the guide plate of the slide chassis. Are guided to restrict the movement of the inner holder during rotation. Further, at the time of sliding, the pin engaged with the guide groove is pulled in the moving direction of the slide chassis by the movement of the slide chassis, so that the inner holder moves together with the slide chassis in the outer holder. Therefore,
The turning operation and the sliding operation of the inner holder can be performed without providing the inner holder at the turning fulcrum.

FIG. 1 is a side view showing an embodiment of the present invention. In FIG. 1, the same or corresponding components as those in FIG. 6 are denoted by the same reference numerals, and duplicate description will be omitted.

A pair of support plates 11 protrude from one end of the main chassis 10, and one end of a lock lever 12 in the shape of a letter "F" is engaged with a side of the other end. A slide chassis 13 is slidably disposed above the main chassis 10. A guide plate 14 protrudes from a substantially central portion of the slide chassis 13, and a semi-circular guide groove 15 is formed in the guide plate 14.

In the vicinity of the upper end of the support plate 11, an outer holder 17 is rotatably supported around a rotation fulcrum 16 as a rotation point, and an inner holder 18 is slidably disposed in the outer holder 17. Inner holder
A pin 19 protrudes from the upper end of the drum 18 on the side of the drum, and a recess for engaging the pin 19 is formed on the side surface of the outer holder 17. A pin 20 protrudes from the side of the inner holder 18 near the front, and the pin 19 is fitted in the inner holder 18.
A guide groove 21 for guiding the pin 20 when the 18 slides is provided. Protruding in the side direction at the lower part of the guide groove 21,
Further, a pin 22 is provided so as to fit into the guide groove 15.

Between the outer holder 17 and the inner holder 18, a cassette holder 23 for pressing the cassette 6 inserted into the inner holder 18 is provided, and is urged by a spring 24. Outer holder 17
A lock piece 25 protrudes downward from a lower portion near the cassette insertion opening so that it can be engaged with a pin 26 provided on the lock lever 12. Also, slide chassis
A lock lever 27 for moving the lock lever 12 for locking the holder is provided between the main chassis 10 and the lock lever 13. 28 is a post.

Next, the operation of the above configuration will be described with reference to FIGS.

In the setup state shown in FIG.
Can be inserted into the inner holder 18 or the used cassette 6 can be taken out. Here, a case where the cassette 6 is set from now on will be described. FIG. 2 shows the inner holder 18.
2 shows the state in which the cassette 6 is inserted and the outer holder 17 is pressed down, the pin 22 is guided by the guide groove 15 and descends, and the lock piece 25 is engaged with the pin 26. In this state, the slide chassis 13 is not pushed in.
A distance L is kept between the right end of the slide chassis 13 and the right end of the slide chassis 13.

FIG. 3 is a plan view corresponding to FIG.
Inside the tape position, a plurality of posts 28 (six in this embodiment) are disposed substantially linearly. A pinch roller 29 is disposed between the posts on the right side of the post 28, and moves with the post 28 while pulling out the tape to the drum 7 side during loading. Reference numeral 30 denotes a fixed post, and 31 denotes a capstan motor directly connected to the capstan 32.

The cassette 6 is mounted, and as shown in FIG.
In a state where the inner holder 18 is pressed down to the slide chassis 13 side, the cassette 6 is in the inner holder 18 as shown in FIG. 3, and the post 28 is not in contact with the tape.
The tape has not been pulled out of the cassette 6 and the inner holder
Reference numeral 18 is in a state in which it extends beyond the main chassis 10 together with the slide chassis 13.

The rotation angle of the cassette holder including the outer holder 17 and the inner holder 18 is determined by the length of the guide groove 15. FIG. 2, FIG.
In the state shown in the figure, the inner holder 18 is supported by the three points of the pins 19, 20 and 22, and is pressed by the leaf spring 5, so that the inner holder 18 does not particularly have a fulcrum.
It is stably held in 17 and does not move or fall off.

Next, when the slide chassis 13 is pushed leftward from the state shown in FIGS. 2 and 3, the inner holder 18 moves integrally with the cassette 6 incorporated in the outer holder 17, and finally the The state shown in FIGS. 4 and 5 is obtained. That is, since the pins 22 of the inner holder 18 are engaged with the guide grooves 15 of the slide chassis 13, the inner holder 18 is pulled in the moving direction of the slide chassis 13 with the movement of the slide chassis 13, and the slide chassis 13 is forcibly forced. And move together. This movement is performed until the pin 20 fitted in the guide groove 21 of the outer holder 17 is locked to the left end of the guide groove 21 (therefore, the length of the guide groove 21 is set equal to the distance L). ing). In this state, the positional relationship is such that the drum 7 enters the recess 8 of the cassette 6. In this state, the pin 19 is detached from the outer holder 17,
Since the inner holder 18 is constantly pressed by the leaf spring 5, the outer holder 17 can be moved without any trouble.

The cassette 6 is moved into the inner holder 18 by the slide chassis 13.
In conjunction with the movement, the entire post 28 and the pinch roller 29 move while following a predetermined locus while pulling out the tape from the cassette 6 by a post moving mechanism (not shown), as shown in FIG. The tape is wound around the drum 7 and the pinch roller 29 and the capstan 32
Is loaded so that the tape passes between them.

[Effects of the Invention] As described above, according to the present invention, the inner holder does not have a rotation fulcrum with respect to the slide chassis, and the inner holder is provided with a pin loosely fitted in a guide groove protruding from the slide chassis. , The rotation angle of the holder is small, and the cassette can be easily attached and detached. Also, since only the outer holder has a pivot point, assembly and disassembly can be performed simply by attaching and detaching the pivot point of the outer holder, thereby reducing the number of assembly steps and the number of parts. it can.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a cassette loading apparatus as one embodiment of the present invention, FIG. 2 is a sectional view showing a state where a cassette holder is pressed down from the state of FIG. 1, and FIG. 3 is FIG. 4, FIG. 4 is a side view showing a state where the sliding operation started from FIG. 2 is completed, FIG. 5 is a plan view corresponding to FIG. 4, and FIG. 6 is a view of a conventional cassette loading device. FIG. 7 is a perspective view showing the structure, and FIG. 7 is a plan view showing a schematic structure of the cassette shown in FIG. 6 and the embodiment of the present invention. In the figure. 5: Leaf spring 6: Cassette 7: Drum 10: Main chassis 11: Support plate 12: Lock lever 14: Guide plate 15, 21: Guide groove 16: Rotating fulcrum 17: Outer holder 18: Inner holder 20, 22: Pin

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidetoshi Matsuoka 770 Shimonoge, Takatsu-ku, Kawasaki, Kanagawa Prefecture Inside the Tamagawa Office of Canon Inc. (72) Takashi Kimura 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Inc. In-house (56) References Japanese Utility Model Showa 61-195563 (JP, U)

Claims (1)

(57) [Claims] 1. A cassette holder comprising an inner holder in which a cassette containing a tape-shaped storage medium is mounted, and an outer holder which is slidably fitted in the inner holder and is rotatably fixed to a chassis. A cassette loading device for moving the inner holder forward and backward from a cassette insertion position to a loading completed position, wherein an engagement member protruding from a side surface of the inner holder and a slidable arrangement on the chassis. A guide groove provided on a guide plate formed on the slide chassis, the guide member guiding the engagement member in accordance with the rotation of the cassette holder. A cassette loading device characterized by reciprocating an inner holder.