JP2573871Y2 - Magnetic tape recording / reproducing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape recording / reproducing apparatus, and more particularly, to a magnetic tape recording / reproducing apparatus having a lifting mechanism for loading / unloading a magnetic tape cassette from / to a base.

[0002]

2. Description of the Related Art A magnetic tape recording / reproducing apparatus for recording / reproducing a magnetic tape cassette by taking a magnetic tape cassette from the inside of a front plate has been demanded particularly in the field of a vehicle where the area of the front plate is limited. FIG. 7 is a longitudinal sectional view showing the operation of the conventional magnetic tape reproducing device 1. The front panel 23 has an insertion port 27.
The insertion port 27 is provided with a door 28 which is spring-biased in the direction of arrow G for dust prevention and the like. Inside the magnetic tape reproducing apparatus 1, a holder 6 is provided facing the insertion opening 27 and supported by a vertically moving member 7 by a connecting mechanism 9, and the vertically moving member 7 is supported by a base (not shown) by a support shaft 8. Attached to the side plate. The vertically moving member 7 has a guide groove 19, and the guide groove 1
A guide pin 21 erected on a lever (not shown) is inserted through 9.

The base end 28a of the door 28 for closing the insertion slot 27
The cassette 5 is moved from the downstream end 5b in the insertion direction B to the insertion opening 27 as shown in FIG. 7A while pushing up the cassette 5 in the direction opposite to the arrow G against the spring force of the spring. As it is inserted, the locking piece of the guide mechanism (not shown) fits into the hub hole of the cassette 5 and guides the cassette 5 into the holder 6.

When the cassette 5 is stored in the holder 6, the vertically moving member 7 is angularly displaced in the direction of arrow C about the support shaft 8 as shown in FIG. The holder 6 is interlocked with the up and down moving member 7 and displaced in the direction of arrow C while being displaced in the direction opposite to the arrow E so as to be parallel to the base 3 and standing on the base 3. No reel axis, capstan axis, guide pins 17a, 17b
Through a predetermined insertion hole provided in the cassette 5.

[0005] As shown in FIG. 7 (3), when the insertion is completed and the reproducing operation of the magnetic tape is performed, the cassette 5 is moved by the upstream end 5 a in the insertion direction B to the base end 28 of the door 28.
A free end portion 28b formed to be suspended from a. With these series of operations, the loading operation of the cassette 5 is completed.

When the cassette 5 is discharged, as shown in FIGS. 7 (3) to 7 (2), a lever (not shown)
The guide pin 21 slides in the guide groove 19 of the side plate 7a of the up-and-down moving member 7 by this pressing operation. The vertically moving member 7 is pushed up the guide groove 19 by the guide pin 21 and is displaced in the direction opposite to the arrow C. Accordingly, the holder 6 is pulled up in the direction of the arrow F by the vertically moving member 7, and at this time, the end 5a of the cassette 5 is pushed down by the spring-biased door 28 so that the connection mechanism 9 is pivoted. While greatly displacing in the direction of arrow E, the door 28 is jumped up in the direction opposite to the arrow G and displaced to the height of the insertion slot 27.
With the holder 6 displaced to the height of the insertion slot 27, the cassette 5 is pushed out of the insertion slot 27 while locking the door 28 by the guide mechanism. With these series of operations, cassette 5
Is completed.

[0007]

[Problems to be solved by the invention]
Some cassettes are chamfered for design reasons. When such a cassette 12 is used in the magnetic tape reproducing apparatus 1 having the above-described structure, the cassette 12 shown in FIG.
As shown in (4), an undesired swing displacement of the holder causes the door 2 to move.
8 slips through the rear end 12 a of the cassette 12, making it impossible to eject the cassette 12.

An object of the present invention is to smoothly insert a cassette /
An object of the present invention is to provide a magnetic tape recording / reproducing apparatus capable of discharging.

[0009]

According to the present invention, a magnetic tape cassette is inserted into an insertion opening having a spring-biased door from a downstream end in an insertion direction, and the inserted cassette is held in a holder. The loading / unloading is performed at a predetermined recording / reproducing position by a vertically moving member that moves the holder toward / away from the base, and when the cassette is loaded, the free end of the door is inserted into the cassette held by the holder. In the magnetic tape recording / reproducing apparatus having a structure to be locked at the upstream end in the direction, the base is opposed to the upstream end of the cassette, and the base is located higher than the recording / reproducing position of the upstream end. A magnetic tape recording / recording device provided with a restraining member for restraining a displacement toward the magnetic tape.
It is a playback device.

[0010]

According to the present invention, the cassette is housed in the holder from the insertion opening by pushing open the spring-biased door, and the holder is connected to the up-and-down moving member by the connection mechanism, so that the cassette is moved closer to the base. In a magnetic tape recording / reproducing apparatus which can be separated and displaced to load / unload a cassette, a restraining member is provided at a position on the base opposite to the upstream end in the insertion direction of the cassette.

On the other hand, when the cassette is loaded, the free end of the door abuts on the upstream end in the insertion direction and is locked, so that when the loaded cassette is to be discharged, a spring is provided. Due to the resilience of the urged door, the upstream end of the cassette in the insertion direction is about to be displaced closer to the base. However, the displacement of the cassette is inhibited by the inhibiting member abutting on the upstream end in the insertion direction. Even if the cassette is chamfered, undesired displacement of the cassette is suppressed, so that the free end of the door does not slip through. It is flipped up and discharged from the insertion slot.

[0012]

FIG. 1 is a perspective view showing a simplified structure of an elevator mechanism 32 in a magnetic tape recording / reproducing apparatus 31 according to one embodiment of the present invention, and FIG.
FIG. 2 is an exploded perspective view showing a configuration in which key points 2 are simplified. In these drawings, a tape drive mechanism such as a pinch roller, a capstan or a motor, a magnetic head, and the like are omitted. The cassette 35 is loaded into the apparatus 31 for recording / reproduction and discharged from the apparatus 31 by the elevator mechanism 32 shown in FIG.

Referring to FIGS. 1 and 2, the structure of the elevator mechanism 32 will be described. On a side plate 34 erected from the base 33 of the magnetic tape recording / reproducing apparatus 31, a vertically moving member 37 for displacing the holder 36 to approach / separate from the base 33 is angularly displaced around the axis of the support shaft 38. Mounted freely. The vertically moving member 37, which is a swing member, is spring-biased in the direction of arrow C1 by a spring (not shown) or the like, and is connected to the holder 36 via a connecting mechanism 39. By the connecting mechanism 39, the holder 36
Is supported so as to be angularly displaceable in the direction of arrow E1 with respect to the vertical moving member 37, and as the vertical moving member 37 is displaced around the axis of the support shaft 38, the holder 36 is moved upward and downward. It moves up and down in the direction F2. Thus, the cassette 35 accommodated in the holder 36 is displaced upward / downward.

A lock lever 41 is attached to the surface of the vertical movement member 37 facing the base 33 so as to be angularly displaceable about the axis of the support shaft 40. The lock lever 41 has an engagement piece 43 at one end with respect to the support shaft 40.
Are formed on the side plate 34 of the base 33.
The contact of the lock lever 3 restricts the angular displacement of the lock lever 41 and locks the vertically moving member 37 at the raised position. The lock lever 41 has a detection piece 42 formed at the other end with respect to the support shaft 40, and detects the end of insertion of the cassette 35 by the detection piece 42. A lever 50 is provided along the side plate 34. The lever 50 extends along the side plate 34, is a substantially plate-like body, and is movable along the insertion direction B1 of the cassette 35. , For example, in a direction opposite to the insertion direction B1. In the lever 50, the downstream end 5 in the insertion direction
0b is provided with a guide pin 51, and the pin 51 fits into a guide groove 49 formed on the side surface 37a of the vertically moving member 37 so as to be inclined in the descending direction F2 along the insertion direction B1. .

When the upstream end 50a of the lever 50 in the insertion direction is pressed and displaced in the insertion direction B1 when the holder 36 at the lower position is raised, the pin 51 provided at the downstream end 50b moves up and down. The guide groove 49 of the member 37 is slid.
A pressing force is applied to the vertical moving member 37 by the pin 51, and the vertical moving member 37 is angularly displaced in a direction opposite to the arrow C1, and as a result, the holder 36 moves up in the arrow F1 direction.

On the up-and-down moving member 37, a guiding mechanism 55 is provided.
Is provided. The guiding mechanism 55 includes a connecting piece 52, a contact piece 5
3. It further includes a locking piece 54. A reversing spring 46 is attached to the connecting piece 52 between a movable point 45 which can be moved in advance. By the action of the reversing spring 46, the guide mechanism 55 is guided by the guide groove 44 formed along the insertion direction B1 on the vertical moving member 37 and is slidable. The cassette 35 inserted therein is locked, and the cassette 35 is guided according to a predetermined conveyance range. Further, the contact piece 53 of the guiding mechanism 55 that slides causes the detection piece 42 of the lock lever 41 to be pressed and displaced, thereby functioning to release the engaged state.

The upper end surface 34b of the side plate 34
From above, a locking piece 70 is formed so as to protrude along a virtual plane perpendicular to the side plate 34, and an elastic member 71 such as a sponge is attached to a portion of the holder 36 facing the locking piece 70. I have. Thus, the rising holder 36 comes into contact with the locking piece 70 and is locked, and as a result, the rising position of the holder 36 is regulated by the locking piece 70.

FIG. 3 is a longitudinal sectional view showing the support when the cassette 35 is loaded, and FIG. 4 is a horizontal sectional view thereof.
A door 58 is provided at an insertion port 57 provided in the front plate 62 for inserting / ejecting the cassette 35 for dust prevention or the like. The door 58 includes a base end 58a supported by a shaft 56 so as to be openable and closable, and a free end 58b hanging from the base end 58a.
The insertion opening 57 is closed by being pressed in the direction of the arrow G1 by the spring 59 wound around.

The cassette 35 inserted from the insertion port 57
Moves the base end portion 58a of the door 58 angularly in the direction opposite to the arrow G1 against the elastic force of the spring 59 and is guided by the holder 36. The cassette 35 stored in the holder 36 is The door 58 is in contact with the free end 58b of the locking member 58 so as to prevent the door 58 from closing the insertion opening 57. In a part of the base on which the upstream end 35a of the cassette 35 accommodated in the holder 36 faces, the upstream end of the cassette 35 in the loaded state after the downward displacement of the cassette 35 in the arrow F2 direction. Part 35a
The cassette 35 when loaded.
The first stop member 60 is provided with a deterrent member 60 which comes into contact with the upstream end 35a of the cassette 35 when it is further displaced in the direction of arrow E1 from the loading position.

At the time of loading, in which recording / reproduction is performed, a magnetic head (not shown) slides on the magnetic tape. Further, guide pins 48a and 48b provided on the base 33 are inserted into the insertion holes 73a and 73b of the cassette 35, and the reel shafts 47a and 47b also provided on the base 33 wind the magnetic tape. The capstan shaft (not shown), which is fitted into the hubs 72 a and 72 b, and also protrudes from the base 33, is inserted into the insertion hole of the cassette 35. The reel shafts 47a and 47b rotate the hubs 72a and 72b to run the magnetic tape.

Further, as long as the cassette 35 accommodated in the holder 36 faces the base 33, supporting members 61a and 61b are provided so as to be close to the corners.
A support surface 74 is provided at the base end of each of the guide pins 48a and 48b.
a, 74b are formed. The cassette 35 actually stored in the holder 36 by the vertically moving member 37 is
, The support members 61a and 61b come into contact with the cassette 35, and
4a and 74b are in contact. By the contact of the four places,
The proximity displacement is locked, and the cassette 35 is parallel to the base 33 and is fixed to the base 33 without contacting the mechanical components on the base 33. In the fixed state, the cassette 35 is in a loaded state capable of recording / reproducing.

FIG. 5 is a sectional view showing the structure of the connecting mechanism 39. As shown in FIG. The connecting mechanism 39 is formed from the upper surface of the holder 36, and the connecting piece 67 bent at a right angle to the holder 36.
a, 67b and a connecting piece 68 which is also formed to protrude from the upper surface of the holder 36 and is parallel to the upper surface of the holder 36.
a, 68b, and insertion holes 69a, 69b provided in the vertically movable member 37 and through which the connecting pieces 67a, 67b can be inserted. The connection pieces 67a, 67b are inserted through the insertion holes 69a, 69b, and the connection pieces 68a, 68b
Covers the upstream end 63 of the vertically moving member 37 from above, thereby realizing the connection between the vertically moving member 37 and the holder 36.

As the vertically moving member 37 displaces the holder 36 from the loading position in the direction opposite to the arrow C1, the holder 36 is connected by the upstream end 63 of the vertically moving member 37 to the connecting piece 68.
a, 68b are lifted, and the edges of the insertion holes 69a, 69b abut on the upper surface of the holder 36, so that the holder 36 is in parallel with the base 33 as shown in FIG. It is supported on a line having the points H1 and I1 as end faces. When the holder 36 is displaced in the directions of the arrows F1 and F2, the points H1 and I1 are also displaced. The supporting portion of the holder 36 is
Is unstable due to the displacement of the cassette 35, and is greatly displaced in the direction of the arrow E1 by the pressing of the cassette 35 by the door 58.

Next, when the holder 36 is at the loading position, the cassette 35 is in contact with the support members 61a and 61b and the support surfaces 74a and 74b, but the arrow C1
5 (2), the upper surface of the holder 36 is pushed down on a line having the point J1 as an end surface, and is fixed to the base 33 without backlash. , The cassette 35 is in the loaded state.

FIG. 6 is a longitudinal sectional view showing the operation of the magnetic tape recording / reproducing apparatus 31 of the present invention. When the chamfered cassette 78 is inserted from the insertion opening 57 while pushing the spring-biased door 58 in the direction opposite to the arrow G1, the cassette 78 is stored in the holder 36 by the guiding mechanism 55, The state shown in FIG. When the cassette 78 is stored in the holder 36, the cassette 78 is angularly displaced in the direction of the arrow C1 by the vertical movement member 37 while the chamfered upstream end 78a in the insertion direction B1 is pushed down by the door 58. As a result, the state shown in FIG. Further, when the vertically moving member 37 is displaced in the direction of arrow C1, the cassette 78 becomes parallel to the base 33 due to the swinging displacement of the holder 36 in the direction opposite to the direction of arrow E1, and the guide pin 48a , 48b, etc., and the support members 61a, 61
1b, in contact with the support surfaces 74a, 74b, and FIG.
State. In this state, the cassette 78 has the door 58 locked by the upstream end portion 78a in the insertion direction B1, and the magnetic tape is reproduced. With a series of these operations, the loading operation of the cassette 78 is completed.

Next, when the upstream end 50a of the lever 50 in the insertion direction is pressed in the direction of arrow B1 to eject the cassette 78, the vertical moving member 37 moves the guide groove 49 into the guide pin 5
1 and is displaced in the direction opposite to the arrow C1.
As a result, the holder 36 is pulled up by the vertical movement member 37, and at this time, the upstream end 78a in the insertion direction B1 of the stored cassette 78 is pressed by the spring-biased door 58 to be connected. Although the displacement is largely suppressed in the direction of arrow E1 about the mechanism 39, the displacement is suppressed by the restraining member 60, and the cassette 78 rebounds from the door 58 as shown in FIGS. 6 (3) to 6 (2). Raise the insertion slot 5
It is displaced in the direction of arrow F1 to the height of 7. Fig. 6 (1)
In a state where the holder 36 is displaced to the height of the insertion slot 57 as shown in FIG.
It is pushed out from the insertion opening 57 by the guiding mechanism 55.
The discharging operation of the cassette 78 ends with a series of these operations.

As described above, according to the present invention, in the magnetic tape recording / reproducing apparatus 31, undesired displacement when the magnetic tape cassette 35 is inserted and ejected is suppressed, and the dustproof door 5 is prevented.
8 is locked at the upstream end 35a of the cassette 35 so that the cassette 35 can be smoothly inserted / ejected. Even if the chamfered cassette 78 is used,
Since the undesired displacement of the upstream end 78a of the cassette 78 is suppressed, it is possible to prevent a phenomenon in which the door 58 slips through the upstream end 78a and the cassette 78 cannot be discharged.

[0028]

As described above, according to the present invention, the magnetic tape is displaced up and down with respect to the base and loaded / recorded at the recording / reproducing position.
In a magnetic tape recording / reproducing apparatus that performs ejection, an undesired swing displacement of a magnetic tape is suppressed, and a free end of a dustproof door is always locked at an upstream end in a cassette insertion direction. Enables smooth insertion / ejection.

Therefore, even if a chamfered cassette is used, undesired swing displacement of the upstream end of the cassette is suppressed, so that the door slips through the upstream end and the cassette can be moved. It is possible to prevent the discharge from becoming impossible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a simplified configuration of an elevator mechanism 32 in a magnetic tape recording / reproducing apparatus 31 according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a simplified configuration of a main part of an elevator mechanism 32 of the magnetic tape recording / reproducing apparatus 31.

FIG. 3 shows a cassette 35 of the magnetic tape recording / reproducing apparatus 31.
It is a longitudinal cross-sectional view which shows the support at the time of loading.

FIG. 4 shows a cassette 35 of the magnetic tape recording / reproducing apparatus 31.
It is a horizontal sectional view showing support at the time of loading.

FIG. 5 is a cross-sectional view illustrating a structure of a coupling mechanism 39.

FIG. 6 is a longitudinal sectional view showing the operation of the magnetic tape recording / reproducing device 31 of the present invention.

FIG. 7 is a longitudinal sectional view showing the operation of the conventional magnetic tape recording / reproducing apparatus 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 31 Magnetic tape recording / reproducing apparatus 32 Elevator mechanism 33 Base 34 Side plate 35, 78 Cassette 36 Holder 37 Vertical movement member 39 Connecting mechanism 50 Lever 57 Insertion opening 58 Door 60 Suppression member F1 Ascending direction F2 Ascending direction

Claims (1)

(57) [Scope of request for utility model registration] 1. A magnetic tape cassette is inserted into an insertion opening having a spring-biased door from a downstream end in an insertion direction thereof,
The inserted cassette is loaded / discharged to a predetermined recording / reproducing position by an up / down moving member that moves toward / away from the base while the holder is held by the holder. A magnetic tape recording / reproducing apparatus having a structure in which an end is locked to an upstream end in a direction of insertion of a cassette held by a holder, wherein the base has an upstream end facing the upstream end of the cassette. A magnetic tape recording / reproducing apparatus, further comprising: a depressing member that suppresses a displacement of the unit closer to the base than the recording / reproducing position.