JP2737027B2 - Recording or playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a recording device capable of reliably performing tape loading in a limited space in response to a reduction in the diameter of a rotary drum of a video tape recorder, a so-called VTR. Or, it relates to a playback device.

[Conventional technology]

Parallel loading, so-called M-loading, which is an example of conventional VTR tape loading, will be described with reference to FIG.

In FIG. 8, reference numeral 1 denotes an apparatus main body, 2 denotes a guide member having guide grooves 2a and 2b, and 3A and 3B denote tape pull-out members (hereinafter, referred to as 1) each having one guide roller 3a and 3b opposed thereto.
Drawer member). 4 is a rotary drum, 5 is a tape cassette, and 6 is a tape for recording and reproducing information.

 The operation will be described based on the following configuration.

First, when a tape cassette (hereinafter referred to as a cassette) 5 is loaded into the apparatus main body 1, the guide rollers 3a and 3b of the drawing members 3A and 3B are moved between the tape 6 and the cassette 5 as shown in FIG. The cassette 5 is set on the apparatus main body 1 so as to be interposed. Next, the loading ring (not shown) is driven by the operation of recording and reproduction, and the extraction member 3A is moved to the guide groove 2a.
Then, the pull-out member 3B is guided by the guide grooves 2b and is rotated in the directions A and B in the drawing, and the tape 6 is pulled out from the cassette 5 by the guide rollers 3a and 3b, and FIG.
The information is recorded and reproduced on the tape 6 by being wound around the rotary drum 4 from both sides as shown in FIG.

In recent years, there has been an increasing movement to reduce the size of a VTR by using a small-diameter rotary drum. In this case, it is difficult to perform tape loading while maintaining a tape inclination angle with respect to the rotary drum with a pair of left and right pull-out members. In addition, the tendency to increase the number of drawing members has become remarkable.

[Problems to be solved by the invention]

However, in the conventional example, since the diameter of the rotating drum is reduced as described above, as the number of tape pull-out members increases, the loading mechanism for driving the tape drawing members becomes more complicated, and as a result, the VTR becomes smaller. There is a problem that inhibits the conversion.

The present invention has been made to solve the above-described problems of the conventional example.
The tape can be wound while maintaining the inclination angle of the tape with respect to the rotating drum, and stable tape loading can be performed by minimizing the increase in the number of tape pull-out members, and furthermore, recording or recording that can simplify the loading mechanism. The purpose is to provide a playback device.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, a recording or reproducing apparatus is configured as in the following (1) to (5).

(1) A recording or reproducing apparatus for recording and reproducing information by pulling a tape from a cassette by rotating a pair of tape pulling members in directions opposite to each other by a loading mechanism, and winding the tape around a rotating drum, provided together with one tape pulling member. And a tape pull-out assist member provided between the tape pull-out auxiliary member and the tape pull-out member. The tape pull-out auxiliary member is provided between the tape pull-out auxiliary member and the tape pull-out member. And a differential means for rotating the tape pull-out auxiliary member and the tape pull-out member at different rotation angles, wherein the differential means rotates the tape pull-out auxiliary member and the tape pull-out member at different rotation angles. A recording or reproducing apparatus for imparting a desired tape inclination angle to the rotating drum.

(2) The differential means restricts the movement of the loading mechanism slidable in the rotating direction, the tape extracting member provided with the tape extracting auxiliary member provided in the loading mechanism, and the movement of the tape extracting auxiliary member. The recording or reproducing apparatus according to (1), further comprising a positioning member that locks the tape pull-out auxiliary member and rotates the two members at different rotation angles.

(3) The tape pull-out assisting member is rotatably supported on a distal end of a slide arm which is held and extended in the longitudinal direction of an arm rotatably supported by the loading mechanism. Recording or playback device.

(4) The tape pull-out auxiliary member pivotally supported by the slide arm is not rotatable with respect to the slide arm at the first position where the distance between the support shaft of the arm and the support shaft of the slide arm is maximized. The recording or reproducing apparatus according to (3), wherein the recording or reproducing apparatus is configured to be rotatable at a second position where the distance between the support shaft of the arm and the support shaft of the slide arm is minimized.

(5) The arm and the slide arm are urged by the torsion spring in the direction of rotation of the loading mechanism and the direction in which the slide arm is extended in the process of winding the tape around the rotating drum. The recording or reproducing apparatus according to (3), wherein the loading mechanism is configured to be substantially non-biased in the rotation direction and to be biased only in the extension direction of the slide arm.

[Action]

In the recording or reproducing apparatus according to the present invention having the above-described configuration, a tape pull-out auxiliary member is provided in parallel with one of the tape pull-out members of the loading mechanism, and a different rotation angle is provided between the tape pull-out member and the tape pull-out auxiliary member. A differential means for rotating both members is provided, a loading mechanism slidable in the rotating direction, a tape pull-out member provided with a tape pull-out auxiliary member provided in the loading mechanism, A positioning member that restricts the movement of the tape pull-out auxiliary member, locks the tape pull-out auxiliary member, and rotates the two members at different rotation angles, and the two members are rotated by the differential means. Then, the tape pull-out assisting member is hooked on the positioning member, and even after being positioned at a predetermined position, the tape pull-out member is further rotated, and the rotation angle is larger than the tape pull-out assisting member. In rotated, the desired tape inclination angle with respect to the rotary drum is positioned by reliably given whenever possible position. During this time, the arm and the slide arm are shortened so that the previously set tape pull-out auxiliary member does not hinder the rotation of the subsequent tape pull-out member, and the distance between the support shaft of the arm and the support shaft of the slide arm is the maximum. By reaching the minimum second position from the first position and starting the rotation of the set tape withdrawal auxiliary member with respect to the slide arm, the rotation of the tape withdrawal member is continuously enabled, and The member is given a stable tape inclination angle by the differential of the rotation angle by the differential means. Further, the repulsive force of the torsion spring urged in the direction of extension of the arm and the slide arm and the direction of rotation of the loading mechanism during the tape winding process on the rotating drum causes the rotation of the loading mechanism at the end of tape winding. Since there is almost no movement in the moving direction, the load on the loading mechanism is reduced.

〔Example〕

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

(Structure) FIG. 1 is a plan view of a main part of an unloaded state of a magnetic recording / reproducing apparatus showing one embodiment of the present invention, FIG. 2 is a rear view of a main part of the magnetic recording / reproducing apparatus of the above embodiment, and FIG. FIG. 4 is a plan view of a main part of the magnetic recording / reproducing apparatus showing a loading state of the embodiment, FIG. 4 is an enlarged plan view of a main part of the same unloading state, FIG. FIG. 6 and FIG. 7 are explanatory diagrams of the operation of the main part during loading.

The same or corresponding parts as in the conventional example are denoted by the same reference numerals.

1 to 7, 1A is a main body of the apparatus, 1a is a base of the rotary drum 4, 3C is a tape pull-out member (hereinafter referred to as a pull-out member), 7A is one loading ring constituting the loading mechanism L, and 7B is The other loading ring, 8
Is a slide member which is fitted to two elongated holes 7a provided in the loading ring 7A and is slidably held by the loading ring 7A. Reference numerals 8a and 8b denote first members provided at the projecting portions on both sides of the slide member 8. And a second support shaft. One end of an arm 9 (hereinafter, referred to as a first arm) is rotatably supported by the first support shaft 8a, and the other end of the first arm 9 is provided. The guide member 3C is supported by the guide member 2 and its movement is guided by a guide groove 2a formed in the guide member 2. The slide member 8 is urged counterclockwise by a coil spring 12 against the loading ring 7A.

Reference numeral 10 denotes an arm (hereinafter, referred to as a second arm). The second arm 10 is rotatably supported by a second support shaft 8b of the slide member 8 and is provided in the longitudinal direction of the second arm 10. The second arm 10 holds a slide arm 10A that is slidable in the longitudinal direction of the second arm 10 by fitting into the elongated hole 10d. A third support shaft 10a is provided at the tip of the slide arm 10A, and a tape pull-out auxiliary member (hereinafter referred to as a pull-out auxiliary member) 11 is pivotally supported by the third support shaft 10a so as to be rotatable. Further, both ends are supported by a spring support piece 10c formed to be bent outside the slide arm 10A and a spring support piece 8c provided adjacent to the second support shaft 8b of the slide member 8, and the second support is provided. By the torsion spring 13 wound around the shaft 8b,
Figure 7 a second support shaft 8b and the third first the position P ₁ second arm the distance between the supporting shaft 10a is maximized as shown in (a)
At the same time, the slide arm 10A is urged by the torsion spring 13 in the direction extending in the longitudinal direction of the second arm 10, that is, the direction E in FIG. . At this time, the draw-out assist member 11 is in contact with the outer periphery of the guide member 2 by the bias of the torsion spring 13 via the slide arm 10A.

Further, in Poshishon P ₁ first the tip side surface of the slide arm 10A, a stopper 10b for restricting the rotation of the lead support member 11 about the third shaft 10a are provided upright.

Guide roller 11a, stopper receiver 11b
And a guide stopper 11c.

14 is a positioning member provided on the drum base 1a, 14a
Is a positioning stopper receiver (hereinafter referred to as a stopper receiver) provided on the positioning member 14, and 14b is also a stopper,
G is a drawing assist member formed on the inner surface of the positioning member 14
It is a guide section for guiding 11.

The guide portion G guides the pull-out auxiliary member 11, and the slide arm 10A is pressed in the direction F in FIG. 7 against the bias of the torsion spring 13, so that the second support shaft 8b and the third support The second position shown in FIG. 7 (b) where the distance from the shaft 10a is minimized
In position P ₂ of the second
The urging of the second arm 10 in the counterclockwise direction, ie, the direction A in FIG.
The configuration is such that only the bias in the direction E shown in the figure is obtained.

Then, a long hole 7a provided in the loading ring 7A,
The slide member 8, the second support shaft 8b, the second arm 10, the slide arm 10A, the third support shaft 10a, the elongated hole 10d, the draw-out assist member 11, the torsion spring 13, and the draw-out member 3C
A differential means A for rotating the pull-out assist member 11 and the pull-out assist member 11 at different rotation angles is configured.

(Operation) An operation will be described based on the above configuration.

In FIGS. 1 to 7, first, when the cassette 5 is loaded into the apparatus main body 1A, the guide rollers 3a, 3b, The cassette 5 descends so that 11a intervenes, and is set in the apparatus main body 1A. Next, record. When a reproducing operation is performed, the loading rings 7A and 7B are respectively rotated counterclockwise, that is, the first ring is driven by a loading motor (not shown).
It turns in the direction A in the figure and clockwise, that is, in the direction B in FIG.

Then, by the rotation of the loading ring 7A, the slide member 8 is similarly rotated counterclockwise via the spring 12, and the extraction member 3C and the extraction auxiliary member 11 are guided by the guide groove 2a of the guide member 2 and the peripheral edge. And both rotate counterclockwise.

During the loading, the guide stopper 11c abuts on the guide portion G of the positioning member 14 constituting the differential means A during the loading, and rotates clockwise around the second support shaft 8b, that is, FIG. Is guided in the C direction. At this time, the draw-out auxiliary member 11 is in the state shown in FIG.
Distance between the support shaft 10a has a first Pojijon P ₁ up, pull-out assisting member 11 is in a state which can not be rotated with respect to the third support shaft 10a. Further, as the rotation proceeds, the second arm 10 and the sword arm 10A are guided by the guide portion G.
Contracted against the urging by the spring 13 and the second support shaft 8b and a third second position P ₂ becomes the distance a minimum of a support shaft 10a, the pull-out assisting member 11 of the positioning member 14 When the positioning position is reached, stopper stopper 11b and guide stopper 11c
b and the stopper receiver 14a, respectively, and are positioned.
Thereby, the draw-out auxiliary member 11 becomes rotatable counterclockwise around the third support shaft 10a, that is, in the direction D in FIG.
Further, the bias by the spring 13 is almost negligible in the direction of rotation of the loading ring 7A, ie, the direction A in FIG. 1, and is urged only in the longitudinal direction of the second arm 10, ie, the direction E in FIG.

As a result, the load on the subsequent rotation of the loading ring 7A is reduced. After that, the slide member 8 constituting the differential means A is a long hole of the loading ring 7A.
At the same time as sliding in 7a, the draw-out assisting member 11 rotates counterclockwise around the third support shaft 10a, that is, in the direction D in FIG. The rotation of the extraction member 3C is continued, and the extraction member 3C is
From the guide groove 2a to the guide groove 2c provided on the rotating drum base 1a.
The pulling member 3C and the pull-out auxiliary member 11 are rotated by different rotation angles by the differential means A, and reach the position where the desired tape inclination angle with respect to the rotating drum 4 is given. 3C is positioned and loading is completed as shown in FIG. In this way, the rotation angle differential means A can cope with the rotation of the different rotation angles required at the time of loading between the extraction member 3C and the extraction auxiliary member 11 with a simple configuration. With a relatively simple loading mechanism, a desired tape inclination angle can be easily and reliably applied even to a small-diameter rotary drum.

As a result, of course, it is possible to cope with a small-diameter rotary drum,
By eliminating the inclination of the rotating drum 4 with the base 1a, the rotating drum 4 can be installed vertically with respect to the base 1a,
The effect is that not only the VTR can be made smaller, but also thinner.

Note that the present invention is not limited to the above-described embodiment, and the rotation angles of the tape pull-out member and the tape pull-out assisting member provided separately may be different from each other necessary for providing a desired tape tilt angle. What is necessary is just to comprise a loading mechanism using the appropriate differential means which can rotate effectively by a rotation angle.

〔The invention's effect〕

As described above, according to the present invention, a tape pull-out auxiliary member is provided in addition to one of the tape pull-out members of the loading mechanism of the recording or reproducing apparatus, and a difference is provided between the tape pull-out auxiliary member and the tape pull-out member. A tape pull-out device provided with differential means for rotating the two members at a rotation angle, a loading mechanism capable of sliding the differential means in the rotation direction, and a tape pull-out auxiliary member provided in the loading mechanism; And a positioning member that restricts the movement of the tape withdrawal assisting member, locks the tape withdrawal assisting member, and rotates the two members at different rotation angles. A desired tape inclination angle is provided, and the tape pull-out auxiliary member is rotatably supported by the loading mechanism and extends and contracts in the longitudinal direction of the arm. It is rotatably supported by the support shaft provided at the tip of the ride arm, and cannot rotate with respect to the slide arm in the first position where the distance between the support shaft of the arm and the support shaft of the slide arm is maximized. The arm and the slide are configured to be rotatable at a second position where the distance between the support shaft of the arm and the support shaft of the slide arm is minimized. In the first position, the loading mechanism is urged in the rotation direction of the loading mechanism and in the direction in which the slide arm is extended, and in the second position at the end of tape winding, there is almost no bias in the rotation direction of the loading mechanism. The tape pull-out member and the tape pull-out supporter are configured to be biased only in the extension direction of the tape by a simple loading mechanism by means of the differential means of the rotation angle when loading the tape. By rotating the members at different rotation angles, it is possible to easily and reliably apply the desired tape inclination angle even to a small-diameter rotating drum, simplifying the loading mechanism and assisting the tape withdrawing. Not only can the diameter of the rotary drum be reduced by simply adding the members, but also the rotary drum can be installed vertically on the base by eliminating the inclination of the rotary drum with respect to the base of the apparatus. There is an effect that the size and thickness of the playback device can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a magnetic recording and reproducing apparatus in an unloaded state showing one embodiment of the present invention, FIG. 2 is a rear view of a main part of the magnetic recording and reproducing apparatus of the above embodiment, and FIG. FIG. 4 is a plan view of a principal part showing a loading state of the magnetic recording / reproducing apparatus of the embodiment, FIG. 4 is an enlarged plan view of a principal part of the magnetic recording / reproducing apparatus of the embodiment in an unloaded state, and FIG. FIGS. 6 and 7 are views for explaining the operation of the principal part of the embodiment during tape loading, and FIG. 8 is a view for explaining the M-loading operation of the conventional magnetic recording / reproducing apparatus. 1,1A: Magnetic recording / reproducing device 3A, 3B, 3C: Tape pull-out member 3a, 3b, 11a: Guide roller 7A, 7B: Loading ring 7a, 10d: Slot 8: Slide member 8a First spindle 8b Second spindle 9,10 Arm 10A Slide arm 10a Third spindle 11 Tape pull-out auxiliary member 13 Torsion spring 14 Positioning member A ... Differential means of rotation angle L ... Loading mechanism In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Claims (5)

(57) [Claims] 1. A recording or reproducing apparatus for recording and reproducing information by rotating a pair of tape pulling members in opposite directions by a loading mechanism to draw a tape from a cassette and winding the tape around a rotating drum. And a tape pull-out auxiliary member provided between the tape pull-out auxiliary member and the tape pull-out member. When the tape is pulled out from the cassette, the tape pull-out auxiliary member moves together with the tape pull-out auxiliary member. And
And a differential means for rotating the tape pull-out auxiliary member and the tape pull-out member at different rotation angles, wherein the differential means rotates the tape pull-out auxiliary member and the tape pull-out member at different rotation angles. Thus, a desired tape inclination angle with respect to the rotating drum is provided, thereby providing a recording or reproducing apparatus. 2. A differential mechanism comprising: a loading mechanism slidable in a rotating direction; a tape extracting member provided with the tape extracting auxiliary member provided in the loading mechanism; and a movement of the tape extracting auxiliary member. 2. The recording or reproducing apparatus according to claim 1, further comprising a positioning member that locks the tape pull-out auxiliary member and turns the two members at different rotation angles. 3. The tape pull-out assisting member is rotatably supported on a distal end of a slide arm which is held in the longitudinal direction of an arm rotatably supported by the loading mechanism and extends and contracts. The recording or reproducing apparatus according to claim 1, wherein 4. A tape pull-out assisting member pivotally supported by the slide arm is rotated with respect to the slide arm at a first position at which a distance between the support shaft of the arm and the support shaft of the slide arm is maximized. 4. The recording or reproducing apparatus according to claim 3, wherein the recording or reproducing apparatus is configured to be disabled and to be rotatable at a second position in which the distance between the support shaft of the arm and the support shaft of the slide arm is minimized. 5. The tape and the slide arm are urged by a torsion spring in a process of winding the tape around the rotary drum in a rotating direction of a loading mechanism and in a direction in which the slide arm extends. 4. The recording or reproducing apparatus according to claim 3, wherein in the step, the loading mechanism is substantially not biased in the rotation direction and is biased only in the extension direction of the slide arm.