JPH0415542B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cassette-type magnetic recording/reproducing device, and particularly to an improvement in its impedance roller holding mechanism.

[Technical background of the invention]

As is well known, in a cassette type magnetic recording and reproducing apparatus, a magnetic tape is pulled out from a tape cassette and is wound approximately semicircularly around a rotating head (so-called cylinder) for reproduction and recording. In such a cassette-type magnetic recording/reproducing device, as a means for applying a predetermined tape tension to the magnetic tape wound around the cylinder, the magnetic tape is rotated in accordance with the running of the tape. It is known that an impedance roller that adds an equivalent inertial mass to the magnetic tape is constructed as shown in FIG.

That is, the tape cassette 12 accommodated in the cassette accommodating portion 111 of the main chassis 11 has a tape pull-out member 15 corresponding to a predetermined position near the supply reel 14 of the magnetic tape 13. The tape pull-out member 15 is moved in the direction shown by the dashed line in the figure by a tape pull-out member drive mechanism (not shown), with the magnetic tape being engaged with the tape guide portion 151 thereof. At this time, the tape pull-out member 15 comes into contact with the impedance roller support member 17 that rotatably supports the impedance roller 16, and as the tape pull-out member 15 moves, the impedance roller support member 17 is moved around the rotation shaft 17.
1, it is moved to a predetermined position while being rotated counterclockwise in the figure against the biasing force of the spring member 18.
Here, the impedance roller 16 is brought into contact with the magnetic tape 13 in a predetermined state and is rotated in accordance with the tape running of the magnetic tape 13, giving an equivalent inertial mass corresponding to the running speed of the magnetic tape 13. It is designed to add.

On the other hand, at this time, the magnetic tape 13 is wound by a loading mechanism (not shown) around a rotating head section, so-called cylinder section 19, in a substantially semicircular shape, so that the loading of the magnetic tape 13 is completed so that the tape can be played back and recorded. .

[Problems with background technology]

Incidentally, in any of the cassette-type magnetic recording/reproducing apparatuses equipped with the impedance roller holding mechanism as described above, the tape pull-out member 15 is
Impedance roller support member 1 due to movement of
It was designed to have a large rotation trajectory. This is because the rotary locus of the impedance roller support member 17 needs to be secured as a dead space, which results in a large size, which is a major problem when promoting the miniaturization and high density of devices that are required in recent years. It was something that existed.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an extremely good cassette type magnetic recording/reproducing device which has a simple structure and promotes miniaturization and high density.

[Summary of the invention]

That is, the present invention provides a cassette-type magnetic recording and reproducing apparatus equipped with a rotating member that adds a pseudo-inertia to a running magnetic tape, which includes: a tape pull-out member that pulls out the magnetic tape wound around a tape cassette; The rotary member is rotatably supported, and includes a rotatably provided support member that is rotated by being pressed by the tape pull-out member, and a rotatably provided support member that is rotatably provided at one end of the rotary member. A regulating member is provided with an engaging portion that engages with the position regulating body to regulate rotation, and a regulating member that is provided with a locking portion that engages with the supporting member at the other end; a first biasing means for applying a biasing force to rotate in a direction to abut the tape pull-out member; and a locking portion of the regulation member engages with the support member with respect to the regulation member and the support member. and a second biasing means that applies a biasing force in a direction to cause elastic engagement.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

2 and 3 are a plan view and a side view, respectively, showing an impedance roller holding mechanism of a cassette type magnetic recording/reproducing apparatus to which the present invention is applied. That is, 20 in the figure is a substantially plate-shaped main chassis, and this main chassis 20 has a pair of supply and take-up reel shafts 2 forming a tape running system.
1 and 22 are rotatably provided in correspondence with the supply and take-up reels 24 and 25 of the tape cassette 23, respectively. A tape pull-out member 26 is provided near the supply reel shaft 21 so as to correspond to a tape pull-out member insertion hole 231 formed in the tape cassette 23. This tape pull-out member 26 is provided with a tape guide portion 261 at its tip portion corresponding to the magnetic tape 27, and the magnetic tape 27 is guided by a tape pull-out member drive mechanism (not shown) as shown by the dashed line in the figure. It is designed to be worn and moved.

Further, the main chassis 20 is provided with a tape recording and reproducing mechanism section (not shown) having a cylinder section 28 having a rotating head above the supply and take-up reel shafts 21 and 22 in the drawing. The main chassis 20 corresponding to the tape recording and reproducing mechanism section is provided with an impedance roller holding mechanism 29 that adds a predetermined equivalent inertial mass to the magnetic tape 27 to control tape tension and the like.

Here, this impedance roller holding mechanism 2
Reference numeral 9 denotes a support member 31 that rotatably supports an impedance roller 30 that adds an equivalent inertial mass to the magnetic tape 27 at its intermediate portion, and the intermediate portion rotates with respect to this support member 31 via a rotation shaft 311. A freely supported rotation regulating member 32
It consists of:

One end of the support member 31 is rotatably supported by the main chassis 20 via a rotation shaft 314, and a spring member 33 is attached to a spring engagement portion 312 formed at the one end. It is attached so as to apply force in the clockwise direction in the figure. Further, the support member 31 is provided with, for example, a concave locking portion 313 for restricting rotation at the other end.
This locking portion 313 is engaged with, for example, a convex locking portion 321 provided at one end of the regulating member 32 (see FIGS. 2 and 3).

The regulating member 32 has a regulating engagement portion 322 formed at the other end thereof in correspondence with the drive motor 34 that is grounded to the main chassis 20, for example, and this engagement portion 322 is engaged with the motor 34 so that the regulating member 32 is engaged with the motor 34. Rotation in the counterclockwise direction in the figure is position regulated. A spring member 3 is provided between the regulating member 32 and the supporting member 31.
5 applies the urging force to each other's locking parts 321 and 313.
are applied in the direction of engagement to form an elastic connection.

That is, in the above configuration, when tape loading is performed, the tape pull-out member 26 moves as shown by the dashed line in the figure with the magnetic tape 27 of the tape cassette 23 attached to its tape guide portion 261. be done. At this time, the tape pull-out member 26 presses the end of the support member 31 and rotates together with the regulating member 32 in the counterclockwise direction in the figure against the biasing force of the spring member 33 about the rotation shaft 314. let And these supporting members 31
and the regulating member 32 is the tape pulling member 26
As the is moved, the engaging portion 32 of the regulating member 32 is further rotated counterclockwise in the figure.
2 comes into contact with the outer peripheral portion of the motor 34, and its rotation in the counterclockwise direction in the figure is stopped. Here, when the tape pull-out member 26 is further moved in the direction of the dashed line, the regulating member 32 rotates clockwise in the figure against the biasing force of the spring member 35 about the rotation shaft 311, Configure its travel route. When the tape pull-out member 26 passes through, the support member 31 and the regulation member 32 are returned to their original positions by the biasing forces of the spring members 33 and 35, respectively. At this time, the tape pulling member 26 wraps the magnetic tape 27 around the cylinder part 28 in a substantially semicircular manner, thereby completing the tape loading to the tape recording and reproducing mechanism part. 31 impedance rollers 30 are brought into contact with a predetermined position of the magnetic tape 27 and rotated in accordance with the running of the tape, thereby adding an equivalent inertial mass to the magnetic tape 27.

Furthermore, when the tape pull-out member 26 is reversely moved in order to remove the attached tape, the supporting member 31 and the regulating member 32 perform an operation substantially opposite to the above-described tape loading operation. It constitutes the movement path of the tape pull-out member 26, and its details will be omitted here.

In this way, the impedance roller holding mechanism 29 has the regulating member 32 rotatably provided on the support member 31 that supports the impedance roller 30, and continuously rotates in conjunction with the movement of the tape pulling member 26. It was configured to do so. This allows the rotation locus of the supporting member 31 and the regulating member 32 to be made in an extremely small space, and also allows other components such as the motor 34 to be used as auxiliary members. This can promote miniaturization and higher density of recording/reproducing devices.

Note that this invention is not limited to the above embodiments,
It goes without saying that various modifications can be made without departing from the spirit of the invention.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide an extremely good cassette-type magnetic recording/reproducing device which has a simple structure and promotes miniaturization and high density.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a conventional cassette-type magnetic recording/reproducing apparatus, FIG. 2 is a plan view showing a cassette-type magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIG.
The figure is a side view of FIG. 2. 20... Main chassis, 21... Supply reel shaft, 22... Take-up reel shaft, 23... Tape cassette, 24... Supply reel, 25... Take-up reel, 26... Tape pull-out member, 27... Magnetic tape, 28... cylinder section, 29... impedance roller holding mechanism, 30... impedance roller, 31... support member, 32... regulation member, 33... spring member, 34... motor, 35...
...Spring member.

Claims (1)

[Scope of Claims] 1. In a cassette-type magnetic recording and reproducing device equipped with a rotating member 30 that adds a pseudo inertia to a magnetic tape in a running state, a tape drawer that pulls out the magnetic tape wound around a tape cassette to the outside. a member 26; a support member 31 rotatably provided to rotatably support the rotary member and rotated by being pressed by the tape pull-out member; and a support member 31 rotatably provided on the support member. a regulating member 32 that is provided with an engaging portion that engages with a position regulating body to regulate rotation at one end and a locking portion that engages with the support member at the other end; a first biasing means 33 that applies a biasing force to rotationally bias the support member in the direction of abutting the tape pull-out member; and a locking portion of the regulation member with respect to the regulation member and the support member. A cassette-type magnetic recording/reproducing apparatus characterized in that the second biasing means 35 applies a biasing force in a direction in which the supporting member is engaged with the supporting member to cause the supporting member to be elastically engaged.