JPH03283131A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the size of a mechanical deck by obtaining a driving force for the moving mechanism for a reel turntable, matched with the movement intervals of the reels of a tape cassette, by a relative moving mechanism for the tape cassette side of a recording and reproducing head. CONSTITUTION:When the recording and reproducing head is moved relatively to the tape cassette which is loaded in a cassette loading part, an end surface of a head base abuts on end surfaces of reel turntable chassis 31 and 32. The reel turntable chassis 31 and 23 are pressed to move, the interval between the reel turntables 11 and 12 varies, and the interval between the reels in the tape cassette also varies integrally. Consequently, the dead space in the tape cassette varies, namely, becomes large, the driving force for the reel turntable moving mechanism is obtained by the moving mechanism which moves the recording and reproducing head relatively, and the cassette loading part can be formed to nearly the same size with the tape cassette. Consequently, the constitution of the mechanical deck is simplified and reduced in size.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic recording and reproducing device, and particularly to a magnetic recording and reproducing device that performs recording and reproducing with a recording and reproducing head inserted into a dead space of a tape cassette. Regarding.

[Summary of the invention]

The present invention is a magnetic recording and reproducing device that performs recording and reproducing by loading a tape cassette which movably houses a pair of reels on which a tape is wound and which can expand the dead space. By moving the reel stand to a predetermined position by relative movement between the head and a pair of reel stands, and moving the reel inside the tape cassette integrally with this reel stand, the dead space inside the tape cassette is It expands during loading, allowing the recording/playback head to be inserted into the tape cassette.
This allows the mechanical deck constituting the cassette loading section to be downsized.

[Conventional technology]

Conventionally, magnetic recording and reproducing devices, especially video tape recorders (
VTRs) are being made smaller to make them easier to carry, and this reduction in size involves making the mechanical decks that make up the tape running system smaller.

Techniques for downsizing mechanical decks include making the tape cassette smaller, making the rotary head drum smaller in diameter, and making effective use of the dead space within the tape cassette.

In these methods, if the tape cassette is made smaller, in order to ensure compatibility in loading the cassette, an adapter is used or a reel stand moving mechanism is installed to match the spacing between the reel stands due to the difference in cassette size. .

Further, those that utilize the dead space of a tape cassette are constructed so that a rotary head drum and a tape loading mechanism are moved and inserted into the dead space.

[Problem to be solved by the invention]

Conventional methods for downsizing VTRs that make tape cassettes smaller use adapters or are equipped with a mechanism for moving the reel stand, which makes the operability and mechanism complicated, and also reduces the diameter of the rotating head drum. When using a standard tape cassette, there is a limit to the tape running diameter due to the drum winding diameter, so there are design constraints on miniaturization.

Although it is effective to move and insert a rotary head drum etc. into the dead space of the tape cassette in order to achieve miniaturization, the amount of insertion is limited by the dead space of the tape cassette used, and the tape cassette moves relatively. There is a limit to the width of the joint surfaces that correspond to each other and serve as supporting surfaces between the chassis in which the rotary head drum is loaded and the chassis in which the rotary head drum and the like are disposed.

In other words, if the corresponding width of the joint surface is small when both chassis are moved relative to each other, it will easily swing and become unstable, and the return movement will not be performed smoothly, making it impossible to reliably insert the rotating head drum, etc. into the tape cassette. Therefore, it is necessary to make the corresponding width of the joint surfaces of both chassis relatively large.
Increasing the joint surface of both chassis requires increasing the surface area of both chassis, and increasing the surface area of both chassis also increases the size of other components, which can lead to problems that hinder miniaturization. there were.

The present invention has been made in view of the above, and has a structure in which a chassis forming a loading section of a tape cassette and a chassis of a supporting section for recording/reproducing heads etc. are moved relative to each other. It is an object of the present invention to provide a magnetic recording/reproducing device in which relative movement of chassis is performed stably, smoothly, and reliably, and in which a mechanical deck composed of both chassis is miniaturized.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a magnetic recording system in which a pair of reels on which a tape is wound is movably housed, and a tape cassette is loaded in the tape cassette which can expand the dead space for recording and reproduction. A playback device in which a first chassis constituting a tape cassette loading section and a second chassis in which a recording/playback head and the like are disposed and supported are connected so as to be movable relative to each other, and a pair of reels are attached to the first chassis. The stand is movably disposed via a reel stand chassis, and the end face of the reel stand chassis is configured to correspond to the end face of the head base of the recording/reproducing head supported by the second chassis.

[Effect]

With this configuration, when the recording/reproducing head is moved relative to the tape cassette loaded in the cassette loading section, the end surface of the head base comes into contact with the end surface of the reel stand chassis, and this reel stand chassis is pressed and moved, and the interval between the reel stands changes, and the interval between the reels in the tape cassette also changes in the same direction.As a result, the dead space in the tape cassette changes, that is, is expanded. A recording/reproducing head can be inserted into this put space, and a tape is loaded into the tape cassette.

As a result, the driving force of the reel table moving mechanism is obtained by the moving mechanism that moves the recording/reproducing head relatively, and the cassette loading section can also be formed to be approximately the same size as the tape cassette, which simplifies the structure of the mechanical deck. Miniaturization can be achieved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, (1) shows a mechanical deck of an 8mm VTR, which is a magnetic recording/reproducing device having a rotating head of this example, that is, a video tape recorder (VTR), and (2) shows a planar shape that is approximately the same size as an 8mm tape cassette. Has a bottom part (2a)
, rear wall part (2b) and both side wall parts (2c), (
2d) is a box-shaped first chassis, (3) is a plate-shaped second chassis that is slidably disposed on the first chassis (2) in the front-rear direction, and (4) is the first chassis. Approximately the same size as (2), the top surface part (4a), both side wall surfaces (4b), (4C
), and the first chassis (
2) Both side wall parts (2c
), both side wall portions (3b) at the front end of (2d),
(3c) is pivoted at the rear end of the first chassis (
2), and when the third chassis (4) is laid down in the same plane as the first chassis (2) and opened. The second chassis (3) is connected to the first chassis (2
) over the third chassis (4).

(5) is pivoted to the open front side of the first chassis (2), that is, to the front ends of both side walls (2c) and (2d), and is laid down on the top side of the first chassis (2). As will be described later, this is a cassette holding frame that holds down a tape cassette (6) that is fitted and housed in the first chassis (2).

As described above, the second chassis (3) and the third chassis (4) are laid down on the same plane in the opening direction with respect to the first chassis (2), and the first chassis (2) In this example, the first chassis (4) can be moved from the first chassis (4) to the third chassis (4) as shown in FIGS.
Retaining pieces (3a) protruding from both side edges of the second chassis (3) on both side walls (2c) and (2d) of 2),
(3b) is slidably engaged with the kerf (2CI), (
2a+) is formed horizontally. On the other hand, on both side walls (4b) and (4c) of the third chassis (4), when the third chassis (4) is laid down on the same plane as the first chassis (2), First chassis (2
) are formed with kerf grooves (4b+) and (4c+) that are horizontally continuous with kerf grooves (2c+) and (2a+), and from this, the second chassis (3) is connected to the first chassis (2). From the side to the third chassis (4) side, the retaining piece (3a), (
3b) is the kerf (2c+), (2dυ to (4b+),
It is made movable by sliding over (4c+).

In the chassis structure of the mechanical deck (1) configured as described above, a supply side reel stand (11) and a take-up side reel stand (12) are arranged in the first chassis (2), and both of these are disposed in the first chassis (2). A reel stand drive mechanism (13) that switches and drives the reel stands (11) and (12), and a tape guide boss (14).
) ((14a), (14b)), tape loading mechanism (15), etc. are provided, and the second chassis ((14a), (14b)) is provided.
3) is equipped with a rotary head drum (16) in which a drive motor is integrally built, a hitching roller (17), an impedance roller (18), etc.

Moreover, one end of the first link piece (22) whose rotation center is the pivot shaft (21) with respect to the first chassis (2) is attached to the side wall surface (4b) of the third chassis (4). 23)
The first link piece (22) has a retaining pin (24) projecting from the other end thereof, On the other hand, a second link piece (25) is pivotally connected to the cassette holding frame (5) by a shaft pin (26) at its middle part, and a second link piece (25) is attached to the -half side of the second link piece (25). An engagement groove (27) into which a retaining pin (24) protruding from the first link piece (22) is engaged is formed, and a presser pin (
28) is provided protrudingly.

The engagement groove (27) of this second link piece (25) is connected to the third link piece (25).
In the rotation of the chassis (4) with respect to the first chassis (1), that is, in the opening operation, this third chassis (4)
The relief part (27a) on which the retaining pin (24) of the first link piece (22), which is rotated in one direction, slides into contact with the third chassis (4) is horizontally laid down. A non-retaining portion (27b) in which the engaging pin (24) is free to separate.
and an engagement groove portion (27c) that comes into contact with and moves to be pressed by the engagement pin (24) when the third chassis (4) closes the lid of the first chassis (2).

In this way, the third chassis (4) and the presser frame (5)
) are engaged between the first and second link pieces (2
2) and (25) rotate the lid of the third chassis (4) with respect to the first chassis (2) to open and rotate the presser frame (5) to stand up in a substantially vertical direction while lying down horizontally. Accordingly, the second link piece (25) is rotated upright, and the presser pin (28) is positioned above the first chassis (2) (FIG. 3A).

In this state, the tape cassette (
6) and engage the reel stored in the cassette body (6a) with the reel stands (11) and (12).

Then, as shown in Figure 3B, the presser frame (5) is placed in the first position.
When the chassis (2) is laid down on the upper surface side to press the tape cassette (6), the second link piece (25) is also laid down and rotated, and the presser pin (28) presses the tape cassette (6).
) of the lid (7), the lid (7) is pressed downward by coming into contact with a notch-shaped retaining portion (7a) formed on the rear side from its shaft support, whereby the lid (7) is rotated in the opening direction, Presser frame (5)
When the tape cassette (6) is completely pressed down and rotated, the second link piece (25) is rotated greatly and the lid (
7) is pushed to the final stage by the holding pin (28) of the second link piece (25) and is opened and raised.

Then, the second chassis (3) is replaced with the third chassis (4).
side to the first chassis (2) side (C in the same figure),
This movement of the second chassis (3) causes the rotary head drum (16), pinch roller (17), impedance roller (18), etc. to move from the opening into the dead space in the cassette body (6a) of the tape cassette (6). It is inserted (D in the same figure).

In this state, when the third chassis (4) is rotated to close the lid toward the first chassis (2), the first link piece (22) is also rotated, and the first link piece (22) is rotated accordingly. The retaining pin (24) of the link piece (22) is connected to the second link piece (25).
) slides into pressing contact with the engagement edge (27c) side of the engagement groove (27) of
is rotated so that the presser pin (28) side is raised using the shaft support for the presser frame (5) as a fulcrum, and the pressure on the lid (7) of the tape cassette (6) is released. ) is closed by its own closing biasing force (E in the same figure). Therefore, when the third chassis (4) is in a closed state with respect to the first chassis (2), the second link piece (25) is moved by the first link piece (22) to the presser pin (2).
8) is rotated so that the side is raised significantly, and as a result, the pressure from the presser pin (28) on the lid (7) is released and the lid is closed against the opening of the tape cassette (6) (FIG. F).
). In this state, tape loading is performed on the rotating head drum (16).

In addition, the third chassis (4) closes the lid of the first chassis (2) in this way, and the lid (7) of the tape cassette (6) stored in the first chassis (2) closes. In the closed state, when the third chassis (4) is rotated in the opening direction, the second link piece (25) connects with the first link piece (22).
), that is, the presser pin (28) side is rotated so as to be displaced downward, and the cover (7) of the tape cassette (6) is pressed by this presser pin (28) and rotated in the lid opening direction. be moved. The third chassis (4) is connected to the first chassis (2).
), M (7) of the tape cassette (6) is completely opened, and in this state, the second chassis (3) is opened from the first chassis (2) side. 3 to the chassis (4) side.

When the presser frame (5) is raised and rotated in this state, the second link piece (25) is also rotated upward, and the cover (7) of the tape cassette (6) is moved upward by the presser pin (28). ) is released and the lid (7) is placed in the tape cassette (
6), and the closed tape cassette (6) can be taken out from the first chassis (2) side.

In the above operation, the movement of the second chassis (3) between the first and third chassis (2) and (4) is controlled by the protrusions (3a) protruding from both side edges of the second chassis (3). ),
(3b) is a guide groove (2cl) that horizontally communicates between the first and third chassis (2) and (4) when the third chassis (4) is opened.

(2dl), (4b,), and (4CI) smoothly without swinging.

As mentioned above, this second chassis (3) is equipped with a rotating head drum (16), and is also equipped with a supply side reel stand (11) disposed in the first chassis (2) and a winding head drum (16). The take-off reel stand (12) is a reel stand chassis (
31) and (32).

The reel stand chassis (31) and (32) are connected to the bottom surface (2a) of the first chassis (2) as shown in FIGS. 1 and 4.
A head drum base (33) on which the rotary head drum (16) is mounted on the second chassis (3), spaced apart from each other by a required interval on the left and right so as to sandwich the rotary head drum (16) on the ) side.
Each reel stand (11) is located at approximately the same height as the
and (12) are rotatably mounted by shaft pins (34) and (35) at symmetrical locations equally spaced apart from the axis.

The reel stand chassis (31) and (32) are provided with stopper pins (36) and (37), respectively, so that the reel stands (11) and (12) are always maintained at a specified interval.
restraining springs (38) and (39) so as to be locked to the
rotationally biased. In addition, the supply side reel stand (1
First and second guide bosses (14a) and (14b) are provided on the front edge side of the reel stand chassis (31) to which 1) is pivoted.
are erected at required intervals.

By arranging the reel stands (11), (12) and the rotary head drum (16) in this way, the second chassis (3) on which the rotary head drum (16) is attached can be attached to the first chassis ( 2) with the lid opened horizontally.
When the rotary head drum (16) is moving toward the chassis (4) of the reel, the rotary head drum (16) is separated forward from the reel stands (11) and (12) (FIGS. 1 and 4A).

Then, the second chassis (3) is connected to the first chassis (2).
) side, the rotary head drum (16) is also moved to the - body, and the reel stand (1) in the first chassis (2)
1) and (12), and the end surface of the head drum base (33) is in contact with the reel stand chassis (31) and (12).
32) (Fig. 4B). When this second chassis (3) is further moved, the head drum base (33) is moved between both reel stand chassis (31) and (32).
) is pressed against the biasing force of the restraint springs (38) and (39), and as a result, both reel stand chassis (31) and (
32) are rotated around the shaft attachment portions formed by the shaft pins (34) and (35) (FIG. C), and when the second chassis (3) is moved to the end, both reel stand chassis (31) ) and (32) are rotated to the maximum position by the pressure of the head drum base (33), and the reel stand (11) and (
12) has been widened, and both reel stands (11),
(12) The rotary head drum (16) is positioned between them (D in the same figure).

On the other hand, in the tape cassette (6) loaded in the first chassis (2), the built-in supply reel (7) and take-up reel are arranged in a defined position within the cassette body (6a) of the tape cassette (6). In other words, in a normal state, both reels are arranged at a specified interval in the tape cassette (6) and are locked in position in this state, and by releasing this lock, the above-mentioned It is adapted to be moved in the same direction as the moving direction of the reel stands (11) and (12).

In this example configured as above, the first chassis (
2), the lid of the third chassis (4) was opened horizontally, the second chassis (3) was moved to the third chassis (4) side, and the presser frame (5) was erected. state, the first chassis (2) has a rotating head drum (
16) is moved outward and opened.

In this state, the reel stand (11) inside the first chassis (2)
and (12) are located at regular intervals, that is, the reel stand chassis (31) and (32) are connected to the stopper pins (36) and (37), respectively, and the restraining springs (38) and (39).
) is locked by the biasing force of the reel stand (11) and (1
2) are held at regular intervals.

Therefore, when the tape cassette (6) described above is fitted and loaded into the first chassis (2), both reels are moved to the reel stand (11).
) and (12), and the positioning lock of both reels is released by a lock release member (40) disposed within the first chassis (2).

In this state, when the presser frame (5) is laid down and the tape cassette (6) is pressed down, the second
By rotating the link piece (25), the presser pin (28)
) presses the retaining part (7a) at the rear of the lid (7), and this press causes this II (7) to stand up and rotate, and the front side opening of the tape cassette (6), that is, the cassette body (6a) will be released.

After the opening of this tape cassette (6) is opened, the second
When the chassis (3) is moved toward the first chassis (2), the rotary head drum (16) attached thereto is inserted into the tape cassette (6) through the open mouth, and the rotary head drum (16), the head drum base (33) is connected to the reel stand chassis (31) and (32).
The restraint spring (38) and (
39) to widen the gap between the reel stands (11) and (12), which in turn widens the gap between the reels in the tape cassette (6). The dead space within the tape cassette (6) will increase. Since the rotary head drum (16) enters into this space, the rotary head drum (16) is completely inserted into the tape cassette (6).

Then, when the third chassis (4) is tilted toward the first chassis (2) in this state, as described above, the second link piece (25) is connected to the lid (7) of the tape cassette (6).
) is released, the lid (7) closes on the tape cassette (6), and is positioned on the same plane as the tape cassette (6). This allows the third chassis (4
) can be laid down and closed so as to completely overlap the first chassis (2), and has a shape that is approximately the same size as the tape cassette (6) as a whole.

In the above configuration, the second chassis (3) is moved by a drive motor (not shown) provided in the first chassis (1), and is moved in the circumferential direction by the drive motor. The engagement groove (4) is engaged with the operating pin (41).
2), and this engagement groove (42) is connected to the operating groove part (42a) on which the second chassis (3) is slid by the movement of the operating pin (41) and the rotating head drum (
16) and the relief groove portion (42b) which becomes a relief portion for the operating pin (41) during the tape loading operation and the eject lock release operation of the tape cassette (6).
42c).

Further, the pinch roller (17) attached to this second chassis (3) is attached via a pinch arm (43), and the impedance roller (18) attached corresponding to this pinch roller (17) is directly attached to the shaft. Bottle (1
8a), and the second chassis (3
) has an arc-shaped guide hole (44) located near the rotating head drum (16) and through which the loading mechanism (15) passes;
Linear escape grooves (47) in the front-rear direction are formed to escape from the shaft pin (46) of the loading arm (45) that supports the loading mechanism (15), and are located on both sides of the rotating head drum (16). cutouts (48) and (4) to avoid the axes of both reel stands (11) and (12) in the front and back direction.
9) is formed.

The reel stand (1) is also pivoted to the first chassis (2).
Drive transmission mechanism (13) that transmits force to 1) and (12)
is a support plate with a bearing (50) in the center) (
51), a pair of large and small gears (52), (53
) and (54).

(55) are each pivoted in a fitted state, and the respective outer pinions (53) and (55) are connected to the reel stand (11) and (
The support plate (51) is alternately fitted into the gear portions (lla) and (12a) of 12) by rotation of the support plate (51), a so-called swinging motion.

In this example, the reason why the drive transmission mechanism (13) is composed of four gears is because the reel stand (1
Since the distance between 1) and (13) is not constant and changes, that is, they move apart, the reel stand (11)
) and (12) so that the driving force is reliably transmitted.

Also, both side walls (2C) of the first chassis (2) and (2
Recesses (2 cm) and (2 az) are formed on the upper edge side of the rear part of d) so that the tape cassette (6) can be easily taken in and taken out.

Further, the reel unlocking member (40) of the tape cassette (6) mounted on the first chassis (2) is inserted from the bottom side into the cassette body (6a) of the tape cassette (6) to lock the reel. A substantially triangular pressing piece (40a) is formed to press the locking member.

In addition, each member, namely, the rotation of the sliding rotary head drum (16) of the second chassis (3), the loading of the tape,
As the drive mechanism for rotating the reel stands (11) and (12), a commonly used mechanism such as a motor, a gear reduction mechanism, etc. can be applied, and illustrations and explanations thereof will be omitted.

An example of the tape cassette (6) to be loaded into the mechanical deck (1) constructed as described above will be explained with reference to FIG.

An open recess (6d) is formed in the bottom surface (6b) of the cassette body (6a) of this tape cassette (6) continuously from the front opening (6C) side.
The supply reel (8a) and take-up reel (8b) stored in the cassette body (6a) are arranged in an open recess (6) in the cassette body (6a).
d) The reel holder (9a) and (9
b), its reel shaft retaining hole (8a1) and (8b I)
is rotatably supported so that it faces the bottom side.

The cassette body (6) of this reel body (9a) and (9b)
The center of rotation relative to a) is the aforementioned first chassis (2).
Axis pin (34) of reel stand (11) and (12)
and (35) correspond to the center of shaft attachment in the axial direction.

In addition, a reel (8a) is provided at the rear of the cassette body (6a).
), (8b) and reel holder (9a), (9
A locking member (10) for locking the cassette body (6a) is provided, and this locking member (10) is elastically biased forward and maintained in the locked state so that the front end surface (10a) is locked against the cassette body (6a). ) so as to face the cut groove (6e) formed at the rear edge of the open recess (6d) of the bottom surface (6b). Then, by inserting the release member from the cut groove (6e), the front end surface (10a) of the lock member (10) is pressed and retreated against the biasing elastic force to perform the lock release operation, and the reel (8a) ), (8b) and the reel holders (9a), (9b) are rotatable.

In addition, on both rear corner surfaces of the bottom surface (6b) of the cassette main body (6a), reel shafts of the reels (8a) and (8b) are attached along the rotation locus of the reel holders (9a) and (9b). Hole (8at).

The escape recess (6ft) facing (8b+) is formed continuously with the open recess (6d) of (6h).

Figure 6 also shows the cassette body (of the tape cassette (6)).
The rotating head drum (16), loading mechanism (15), etc. are inserted into the expanded dead space in 6a),
With the lid (7) closed, the magnetic tape T is loaded onto the head drum (16), indicating a recording or reproducing operation state.

〔Effect of the invention〕

As described above, according to the present invention, by moving the reel wound with tape, the dead space within the tape cassette can be expanded, and the recording playback head can be inserted into this dead space. A mechanical deck of a recording and reproducing device for loading a tape cassette, in which a driving force for a moving mechanism of a reel stand matched with a moving interval of a reel of a tape cassette is obtained by a mechanism for moving a recording and reproducing head relative to the tape cassette side. Since I configured it,
Fewer driving sources are required, and at least the thickness of the reel table moving mechanism can be lower than the absolute height of the drum moving mechanism, making it possible to reduce the thickness.

Furthermore, since the moving mechanism is simple, it is possible to significantly reduce the number of parts, costs, adjustments, etc.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an example of a magnetic recording/reproducing device according to the present invention in an open state, FIG. 2 is a perspective view of the same in a closed state, FIG. 3 is an explanatory diagram of the operation of the chassis, and FIG. 4 is a tape drive Fig. 5 is a bottom view of an example of the tape cassette used in the device of the present invention, and Fig. 6 is a plan view with the upper half removed to explain the operating state of the tape cassette. be. In the figure, (2) is the first chassis, (3) is the second chassis, (4) is the third chassis, (5) is the cassette holding frame, (11) and (12) are the reel stand, ( 16) is a rotating head drum, (31) and (32) are reel stand chassis, and (33) is a head drum base. Agent Hidemori Matsukuma Figure 6

Claims (1)

[Claims] A pair of reels on which tape is wound are movably housed,
A magnetic recording and reproducing device that performs recording and reproducing by loading a tape cassette whose dead space can be expanded, in which a first chassis constituting a loading section of the tape cassette, a recording and reproducing head, etc. are arranged and supported. A pair of reel stands are movably disposed on the first chassis via the reel stand chassis, and an end face of the reel stand chassis is connected to the second chassis. The recording and reproducing head supported by the second chassis is moved relative to the tape cassette loaded in the cassette loading section of the first chassis. A magnetic recording/reproducing apparatus characterized in that the reel stand chassis is pressed and moved by the head base to change the interval between the reel stands.