JP2709138B2 - Recording and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for recording / reproducing information by detachably mounting a recording medium storage cassette, and more particularly to a recording / reproducing apparatus for detachably holding the cassette. It has a cassette holder consisting of an inner holder movably provided and an outer holder rotatably provided on the outside, and by rotating the outer holder, the inner holder is rotated in conjunction with this The present invention relates to a recording / reproducing apparatus having a cassette loading mechanism for allowing the cassette to be attached to and detached from an inner holder while facing the outside of the apparatus main body.

2. Description of the Related Art As a device of this type, a VTR (video tape recorder) of a magnetic recording / reproducing device, particularly a small 8 mm VTR, has a structure provided with the above-described cassette loading mechanism.

FIG. 6 shows an inner holder for inserting and removing a recording medium storage cassette (hereinafter abbreviated as a cassette) storing a magnetic tape of a recording medium in such a conventional cassette loading mechanism of a VTR so as to be detachable. 1 shows a cassette holder including an outer holder 2 that is rotated while holding the inner holder 1 to rotate the inner holder 1 when the cassette is attached and detached. FIG. 7 shows the positional relationship between the drum 7 on which the magnetic head of the VTR rotates along the outer circumference and the cassette 6 containing the magnetic tape 9.

The outer holder 2 shown in FIG. 6 is attached to a support plate protruding from a main chassis (not shown) of the VTR, and a cassette can be mounted on or removed from the main chassis around the pivots 4a and 4b or the VTR body. It is supported so as to be rotatable in the directions of arrows C and D toward the descending position pressed by. A leaf spring 5 for pressing the upper surface of the inner holder 1 is attached to the outer holder 2.

The inner holder 1 is attached to a support plate protruding from a slide chassis (not shown) which is slidably disposed in directions A and B which approach and separate from the drum 7 on the main chassis. It is rotatably supported on the slide chassis in the directions of arrows C and D around the rotation center 3b. The inner holder 1 is moved to the outer holder 2 by the slide of the slide chassis.
Is provided slidably in the A and B directions inside the.

Under such a configuration, when the cassette is mounted, the slide chassis is drawn to the movement limit in the direction B away from the drum 7. At this time, as shown in FIG.
b and 4a, 4b are located on the same axis, and the inner holder 1 and the outer holder 2 can be rotated integrally. In this state, the outer holder is rotated in the C direction, the inner holder held by the outer holder is rotated in the C direction, and the cassette insertion opening faces the outside of the apparatus obliquely upward. In this state, the cassette 6 is inserted into the inner holder 1 from the tape drawing surface side.

Next, the holders 1 and 2 are rotated in the direction D to return to the horizontal position (the position parallel to the slide chassis). By this operation, a supply reel (not shown) around which the magnetic tape 9 of the cassette 6 is wound and a take-up reel are fitted to two reel bases provided on a slide chassis (not shown), and the cassette 6 is placed on the slide chassis. Attached to.

Next, by moving the slide chassis in the direction A, the inner holder 1 is moved toward the drum 7 in the outer holder 2, and the cassette 6 is moved with respect to the drum 7 until the positional relationship shown in FIG. As shown in FIG. 7, the cassette 6 has a concave portion 8 on the tape drawing surface side, and when the loading is completed, the cassette is moved to a position where the drum 7 enters the concave portion 8. In conjunction with this operation, a guide post (not shown) moves toward the drum 7, pulls out the tape 9 from the cassette 6, and winds the tape 9 around the drum 7. In this way, the loading is completed, and recording and reproduction are enabled.

In the state of the positional relationship shown in FIG. 7, the pivots 3a and 3b of the inner holder are located closer to the drum 7 by a predetermined distance from the pivots 4a and 4b of the outer holder.

As described above, since the cassette 6 is moved to the drum 7 side and the loading is completed in a state where the drum 7 enters the recess 8 of the cassette 6 as shown in FIG. Can be achieved.

[Problems to be Solved by the Invention] However, in the structure of the conventional cassette loading mechanism of the VTR as described above, there is a limit in reducing the depth of the cassette loading mechanism for the following reasons.

That is, in the above structure, the positions of the pivot points 4a and 4b of the outer holder 2 are determined by the amount of movement of the slide chassis in the direction B separated from the drum 7 from the positions of the pivot points 3a and 3b of the inner holder 1 when the cassette is attached and detached. It must be located at a considerable distance. Therefore, in order to reduce the size of the VTR, the entire length of the outer holder 2 must be shortened, and the turning radius of the outer holder 2, that is, the turning radius of the inner holder 1 cannot be increased.

However, if the rotation radius of the inner holder 1 is small, the angle at which the cassette approaches and separates from the reel base of the slide chassis when the cassette is mounted / detached becomes steep, so that the mounting / detaching of the cassette relative to the reel base cannot be performed properly. Therefore, there is a limit to shorten the overall length of the outer holder 2. For this reason, there is a limit in reducing the depth of the cassette loading mechanism, and this is an obstacle in reducing the size of the VTR.

Therefore, an object of the present invention is not only to the above-mentioned VTR but also to a recording / reproducing apparatus of this kind in which the above-mentioned drawbacks can be solved and the apparatus can be miniaturized.

Means for Solving the Problems In order to solve the above-mentioned problems, in the recording / reproducing apparatus according to the present invention, one end of the recording / reproducing apparatus is turned to a rising position where the cassette can be detached and a descending position pressed by the recording / reproducing apparatus. A rotatable outer holder, a recording medium storage cassette being detachably held, rotatably mounted inside the outer holder with one end as a rotation fulcrum, and at a free end from the rotation fulcrum of the outer holder. An inner holder movably provided in a direction approaching and separating from the rotation fulcrum, wherein the outer holder is moved to the raised position or in a state in which the inner holder is moved in the separating direction for attaching and detaching the cassette. By rotating to the lowered position, the inner holder is rotated in the same direction as the outer holder around the rotation fulcrum of the outer holder and opposite to the outer holder about its own rotation fulcrum. A recording / reproducing apparatus including a cassette loading mechanism configured to rotate in a direction, wherein the inner holder has at least two engagement protrusions on one of side surfaces thereof, and the two engagement protrusions Parts are respectively engaged with two guide grooves formed in the outer holder, and are engaged with one of the two engagement projections, and the engagement projection is used as a rotation fulcrum, and the inner holder is used as a rotation fulcrum. A structure having a support member for rotatably supporting the.

[Operation] According to such a structure, the turning radius of the inner holder about the turning fulcrum of the outer holder by the turning of the outer holder when the cassette is attached / detached is larger than the turning radius of the outer holder. Become. Therefore, even if the entire length of the outer holder is shortened, the moving amount of the inner holder due to the rotation of the outer holder can be increased. Further, the inner holder is rotated about the rotation fulcrum of the own holder in the opposite direction with respect to the outer holder, so that the inner holder moves at an angle nearly parallel to the apparatus main body. The attachment / detachment of the cassette to / from the main body is smoothly and reliably performed.

In addition, since two engagement projections that engage with the two guide grooves of the outer holder are provided on at least one of the side surfaces of the inner holder, if the engagement projections are appropriately attached to this side surface, the inner holder is Can obtain an appropriate posture with respect to the outer holder, and can greatly improve assemblability.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 to 5 illustrate the structure and operation of a cassette loading mechanism according to the present invention of a VTR according to an embodiment of the present invention. Each drawing shows each component of the VTR in a see-through manner.

In these figures, reference numeral 6 denotes a cassette in which the magnetic tape 9 is stored as described above, and the magnetic tape 9 is wound and stored on a supply reel and a take-up reel (not shown). The following mechanisms are provided for loading and unloading the cassette.

First, reference numeral 10 denotes a VTR main chassis. As shown in FIG. 3, a drum 7 on which a magnetic head (not shown) is rotated is provided along the outer periphery of the main chassis 10 at the center rear side. In order to wind the magnetic tape 9 of the cassette 6 around the drum 7, a plurality of guide posts 20 are provided on the main chassis 10 and move in contact with the magnetic tape 9 at the time of loading described later. A fixed guide post 22 is also provided. Further, a capstan 23 for rotating and feeding the magnetic tape 9 and a pinch roller 21 for pressing the magnetic tape 9 against the capstan 23 are provided.

On the other hand, a slide chassis 14 is provided on the main chassis 10 so as to be slidable in the directions of arrows A and B in FIG. A reel base on which a supply reel and a take-up reel (not shown) of the cassette 6 are detachably fitted is provided on the slide chassis 14. An arm support plate 15 is fixed to the end of the slide chassis 14 in the B direction.
It is attached so that it can rotate in the direction. The rotating arms 16 are provided on both sides of the slide chassis 14 via the support plate 15, and the free side ends of the rotating arms 16 (the right end in FIG. 1).
Has an inner holder 17 for holding the cassette 6 so that it can be inserted and removed.
They are connected so as to be rotatable in the F direction. That is, for this purpose, pins 18a and 18b are provided on both sides of the inner holder 17 so as to protrude therefrom. The pin 18b is rotatably supported on the free end of the rotating arm 16, and the pin 18a is Is slidably fitted into an arc-shaped groove 16a formed at the free side end of.

On the other hand, a pair of support plates 11 are screwed on both sides of the main chassis 10, and the outer holder 19
Are rotatably mounted. That is, a shaft 19a is supported at the end of the support plate 11 on the A direction side in FIG.
The outer holder 19 is provided so as to be rotatable in the C and D directions with the shaft 19a as a fulcrum.

The outer holder 19 is provided so as to cover the inner holder 17, and the side plates on both sides face outside the side plates on both sides of the inner holder 17. Two guide grooves 20a, 20b are formed in the side plate of the outer holder 19, and the pins 18a, 18b of the inner holder 17 are respectively formed.
Are movably fitted. The rotation arm 16 is sandwiched between the inner holder 17 and the outer holder 19. The guide grooves 29a and 20b are formed in a substantially U-shape and a straight shape, respectively, and the width of the left end in FIG. 1 corresponds to the diameter of the pins 18a and 18b. Is wider than the left end. With such a structure, the inner holder 17 is rotatably attached to the outer holder 19 via the guide grooves 20a and 20b in the E and F directions, and approaches the shaft 19a of the rotation fulcrum of the outer holder 19, It is provided movably in the direction of separation. Further, the inner holder 17 is rotatable in the E and F directions with respect to the rotating arm 16 via the groove 16a.

The outer holder 19 is given a rotating behavior in the direction C toward the outside of the apparatus by the bias of the spring 25 wound around the shaft 19a of the outer holder 19. In order to lock the outer holder 19 at the pivot position shown in FIGS. 2 and 4, a lock lever 12 is attached to the left end of the outer holder 19 in FIG. The support plate 11 is provided with a guide member 13 with which the rotating arm 16 is engaged at the lock position. The leaf spring 5 is attached to the lower surface of the distal end portion of the outer holder 19 so as to press the inner holder 17 downward.

 Next, the operation of the above configuration will be described.

FIG. 1 shows an outer holder 19 for attaching and detaching the cassette 6.
And a holder-up state in which the inner holder 17 is rotated in the upper C and E directions. To achieve this state, for example, the slide chassis 14 is slid in the direction B by driving a motor (not shown) and a lock lever
The engagement between 12 and the guide member 13 is released. The outer holder 19 is rotated in the direction C by the bias of the spring 25, the rotating arm 16 is rotated in the direction G, and the pins 18a, 18b are respectively connected to the guide grooves 20a, 20b.
And rotates to a position where the rotation is restricted by contacting the left end in the drawing.

On the other hand, the inner holder 17 coupled to the rotating arm 16 by sliding the slide chassis 14 in the B direction is moved in the B direction away from the rotation fulcrum shaft 19a with respect to the outer holder 19, and The rotation of the holder 19 in the C direction causes the shaft 19 to rotate.
a in the same direction about the center of rotation, and the spring 5
With the urging force, the outer holder 19 is rotated in the F direction about the pin 18b as the rotation center. When the pin 18a abuts on the left end of the guide groove 20a, the rotation angle of the inner holder 17 in the F direction is regulated to be smaller than the rotation angle of the outer holder 19 in the C direction. By such rotation, the cassette insertion opening at the left end in the drawing of the inner holder 17 faces the outside of the apparatus, and the cassette 6 can be inserted into and removed from the inner holder 17.

When the cassette 6 is withdrawn, the cassette 6 is pulled out to the left from the inner holder 17 in the state shown in FIG.

When the cassette 6 is mounted, the cassette 6 is inserted rightward into the inner holder 17 in the state shown in FIG.
Is depressed to rotate in the direction D to a position where it becomes a horizontal state (a state parallel to the main chassis 10) as shown in FIG. In the state shown in FIG. 2, the lock lever 12 is a guide member.
The outer holder 19 is locked by engaging with 13.

By the rotation of the outer holder 19 in the direction D, the rotating arm 16 and the inner holder 17 are pushed down via the pins 18a, 18b, and the pins 18a, 1
8b moves to the right in the guide grooves 20a and 20b,
6 rotates to a horizontal position in the H direction. Also inner holder 17
Pivots in the F direction together with the outer holder 19 and abuts on the slide chassis 14, and rotates in the E direction relative to the outer holder 19 which rotates in the D direction and abuts horizontally on the slide chassis 14. At this time, a reel (not shown) of the cassette 6 is fitted on a reel base (not shown) on the slide chassis 14, and the cassette 6 is mounted on the slide chassis 14.

2, the inner holder 17 is a slide chassis.
It is out of the main chassis 10 together with 14.
In this state, as shown in FIG. 3, none of the guide posts 20 are in contact with the magnetic tape 9 stretched over the front end of the cassette 6 in the inner holder 17, and the tape 9 is pulled out from the cassette 6. Not.

Next, the slide chassis 14 is moved by the distance L in the direction A from the state shown in FIGS. This allows the inner holder 17
Moves integrally with the slide chassis 14, and FIG.
The state is as shown in the figure. In this state, the positional relationship is such that the drum 7 enters the recess 8 of the cassette 6. Here, in conjunction with the movement of the slide chassis 14 in the direction A, all of the guide posts 20 and the pinch roller 21 move in the direction of the drum 7 by following a predetermined locus by a post moving mechanism (not shown). As a result, the magnetic tape 9 is pulled out of the cassette 6, the magnetic tape 9 is wound around the drum 7 as shown in FIG. 5, and the tape is stretched so that the tape passes between the pinch roller 21 and the capstan 23, so that the recording / reproducing operation is performed. Becomes possible.

Then, the magnetic tape 9 is fed by driving the capstan 23, and a magnetic head (not shown) rotates along the outer periphery of the drum 7, and slides and contacts the magnetic tape 9 to perform recording / reproduction.

In this state, the engaging pins 18a and 18b are
Since the inner holder 17 is elastically pressed down by the leaf spring 5 without contacting the side edges of the wide portions of 0a and 20b, the inner holder 17 is not in contact with the displacement of the outer holder 19 due to an external impact or the like. The holder 17 can maintain a stable state irrespective of it, and can perform the recording / reproducing operation satisfactorily.

In order to take out the cassette 6 after the recording / reproducing operation is completed, the slide chassis 14 is slid in the direction B from the state shown in FIGS. The cassette 6 is rotated to face the outside of the apparatus, and the cassette 6 can be pulled out from the inner holder 17 as shown in FIG.

According to the present embodiment as described above, when the cassette 6 is attached or detached, the inner holder 17 is moved to a position separated from the shaft 19a of the rotation fulcrum of the outer holder 19, and the shaft is rotated by the rotation of the outer holder 19.
Since the outer holder 19 rotates about the rotation center 19a in the same direction as the outer holder 19, the rotation radius of the inner holder 17 due to the rotation of the outer holder 19 becomes larger than the rotation radius of the outer holder 19. Therefore the outer holder
Even if the total length of the inner holder 17 is reduced and the rotation angle is reduced, a large amount of vertical movement of the inner holder 17 due to the rotation of the outer holder 19 can be obtained. At the time of rotation, the inner holder 17 is
Is rotated in the opposite direction with respect to the outer holder 19 with its own rotation center, so that the cassette moves vertically at an angle nearly parallel to the slide chassis 14, and the cassette is smoothly and reliably attached to and detached from the slide chassis 14. . That is, according to the present embodiment, the overall length of the outer holder 19 can be shortened and the VTR can be downsized without impairing the workability of attaching and detaching the cassette 6.

The above-described structure relating to the cassette loading mechanism is not limited to the VTR, but can be applied to other recording / reproducing apparatuses.

[Effects of the Invention] As is apparent from the above description, according to the recording / reproducing apparatus of the present invention, one end of the recording / reproducing apparatus is turned to the revolving position where the cassette can be detached and the descending position pressed by the recording / reproducing apparatus. A movable outer holder, and a recording medium storage cassette detachably held therein, rotatably mounted inside the outer holder with one end serving as a rotation fulcrum, and at a free end side from the rotation fulcrum of the outer holder. An inner holder movably provided in a direction approaching and separating from a rotation fulcrum, wherein the outer holder is moved to the raised position or lowered in a state where the inner holder is moved in the separating direction for attaching and detaching the cassette. By rotating the inner holder to the position, the inner holder is rotated in the same direction as the outer holder about the rotation fulcrum of the outer holder as the rotation center, and in the opposite direction to the outer holder about its own rotation fulcrum as the rotation center. To rotate A recording / reproducing apparatus provided with a cassette loading mechanism configured as described above, wherein the inner holder has at least two engaging protrusions on one of side surfaces thereof, and the two engaging protrusions are provided on the outer holder. Each of the two guide grooves is engaged with one of the two engagement protrusions, and the inner holder is rotatably supported with the engagement protrusion as a pivot point. Since the adoption of a configuration with a supporting member to
Even if the overall length of the outer holder is shortened, the cassette can be smoothly and reliably attached and detached, and the apparatus can be downsized without impairing the workability of attaching and detaching the cassette, and an excellent effect that good assemblability can be obtained.

[Brief description of the drawings]

1 to 5 illustrate the structure and operation of a cassette loading mechanism of a VTR according to an embodiment of the present invention. FIG. 1 is a side view of a main part of the VTR with a cassette holder up, and FIG. Is a side view showing a state where the cassette holder is lowered from the state shown in FIG. 1, FIG. 3 is a plan view showing the same state, FIG. 4 is a side view showing a loading completed state, FIG. FIG. 6 is a perspective view of an outer holder and an inner holder of a cassette holder of a conventional cassette loading mechanism of a VTR,
FIG. 7 is an explanatory diagram of the positional relationship between the cassette and the drum. 5 ... leaf spring, 6 ... cassette 7 ... drum, 9 ... magnetic tape 10 ... main chassis 12 ... lock lever 14 ... slide chassis 16 ... rotating arm 17 ... inner holder 18a, 18b ... … Pin 19 …… Outer holder

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hidetoshi Matsuoka 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Inside the Tamagawa Works of Canon Inc. (56) References JP-A-1-320665 (JP, A)

Claims (1)

(57) [Claims] An outer holder rotatable between an ascending position at which the cassette can be attached and detached and a descending position pressed by a recording / reproducing apparatus, and a recording medium accommodating cassette which is detachably held and has one end as a pivot point. An inner holder that is rotatably attached to the inside of the holder with one end as a pivot point, and that is provided to be movable toward and away from the pivot point at a free end side of the pivot point of the outer holder. By rotating the outer holder to the raised position or the lowered position in a state where the inner holder is moved in the separating direction for attaching and detaching the cassette, the inner holder rotates around the rotation fulcrum of the outer holder. A recording / reproducing apparatus comprising a cassette loading mechanism configured to rotate in the same direction as the outer holder as a moving center and to rotate in the opposite direction with respect to the outer holder about its own rotation fulcrum as the center of rotation. The inner holder has two engagement protrusions on at least one of the side surfaces, and the two engagement protrusions are respectively engaged with two guide grooves formed in the outer holder, A recording / reproducing apparatus comprising: a support member that engages with one of the two engagement protrusions and rotatably supports the inner holder with the engagement protrusion serving as a rotation fulcrum.