JPS5822313Y2 - Patrone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cartridge, and particularly to a cartridge suitable for storing a magnetic tape of a time-lapse VTR using a wide magnetic tape, which is an example of a recording medium.

For cassette tape recorders and VTRs, when the tape cassette is installed in the tape recorder or VTR,
The lower end of the reel in the cassette is fitted into the reel stand, and the reel is driven to rotate.

The reel is cantilevered at its lower end with respect to the reel stand.

Since the magnetic tape in the tape cassette described above has a narrow width, the reel can be supported with sufficient stability by this method.

However, if a reel wound with a wide magnetic tape is cantilever-supported at one end in the width direction of the tape as described above, stable support cannot be achieved and the reel will not rotate smoothly.

The present invention was developed in view of these problems, and is capable of stably supporting a reel wound with a wide tape with a relatively simple mechanism, and also allows for easy attachment and detachment from a recording/playback device. To provide a cartridge which can be easily used and which can have a large tape width relative to the casing.

An embodiment in which the present invention is applied to a cartridge in a time-lapse VTR, which is an example of a recording/reproducing device, will be described below with reference to the drawings.

First, to explain the outline of this VTR with reference to FIG.
L magnetic tape 2 is wound and stored.

This magnetic tape 2 is pulled out through a slit-shaped opening 3 formed in the cartridge 1, and is pulled out from a pair of fixed guide drums 4.
, 5 is pressed from above by a female guide 8 so as to be in contact with a magnetic head 7 attached to a rotary head drum 6 disposed in the gap between the two, and travels while bending in an arc shape in the width direction. Take-up reel 10 via guide 9
It is configured to be wound up.

Next, the cartridge 1 will be explained with reference to FIGS. 2 to 5. The cartridge 1 includes a casing 11 having a substantially rectangular parallelepiped shape, and a reel 1 rotatably disposed inside the casing 11.
2, and a spindle 13 passing through the center of the reel 12.

The magnetic tape 2 is wound around the outer peripheral surface of the reel 12 coaxially with the reel shaft 12.
The positions of both ends of the reel 12 in the width direction, which is the axial direction, are regulated by a pair of flanges 14 and 15 that are fitted to both ends of the reel 12 in the axial direction.

A pair of side plates 1617 are attached to both ends of the casing 11, thereby closing both ends of the casing 11.

In addition, through holes 18 and 1 are provided at the center of these side plates 16 and 17.
9 is formed.

Further, as shown in FIG. 3, a space with a circular cross section is formed by a thick wall portion 20 on the inner peripheral surface on both sides in the width direction of the casing 11, and in the center part in the width direction of the casing 11. As shown in FIG. 4, a square space is formed by the thick wall portion 21. As shown in FIG.

An opening 22 is formed in the thin wall portion 21.

By inserting a roller through this opening 22 and pressing it against the magnetic tape 2, and rotating this roller, the magnetic tape 2 is transferred to the slit-shaped opening 3 of the casing 11 of the cartridge 1.
It is now possible to intervene from the beginning.

A through hole 23 is formed in the center of the reel 12, and step portions 24 and 25 are formed at both ends of this through hole 23.

Bearings 26 and 27 are press-fitted into the stepped portions 24 and 25, respectively.

The bearings 26 and 27 cause the support shaft 13 to rotate and slide in the axial direction of the reel 12.
It is supported to be movable relative to.

A CIJ song 8 is attached to the support shaft 13, and a coil spring 29 is interposed on the outer periphery of the support shaft 13 between the CIJ song 8 and the bearing 27.

Therefore, the support shaft 13 is biased to the left in FIG. 5 by the coil spring 29 through the CIJ song 8 in order to bias it to one side in the axial direction with respect to the ring 12. The support shaft 13 remains stationary while in contact with the bearing 26.

Further, on the left side of this support shaft 13 in FIG. 5, a suppressed portion 30 in which a split groove is formed is formed.

The outer circumferential portion of this suppressed portion 30 and the reel 1
A boss 32 having a groove 31 is formed protruding from the end surface of the second flange 14 opposite to the wound magnetic tape 2 .

This boss 32 faces the outside of the casing 11 through the through hole 18 of the side plate 16.

Therefore, as shown in FIG.
When attached to the main body and the cartridge 1 is moved to the left or the drive shaft 33 is moved to the right, the tip of the drive shaft 33 provided on the VTR main body is aligned with the support shaft 13 in the axial direction of the reel 12. The pressed portion 30, which is one end, is pressed in the axial direction of the reel 12.

As a result, the support shaft 13 slides to the right relative to the reel 12 in FIG. The pin 35, which is an example of an engaging part, is implanted in the boss 32 of the flange 14 of the reel 12.
As a result, the drive shaft 33 is in a state where it can rotate the reel 12.

Further, as the support shaft 13 slides to the right, the other end of the support shaft 13 in the axial direction of the reel 12, the right end in FIG. 6, protrudes to the right of the casing 11, and
It is received in the recess 37 of the shaft support member 36 provided on the main body side, and thereby the right end of the support shaft 13 is fitted and supported by the shaft support member 36.

Further, the left end of the support shaft 13 only contacts the tip of the drive shaft 33, but the tip of the drive shaft 33 fits into the inner circumferential surface of the boss of the flange 14, and as a result, the reel The left side of 12 will definitely be supported.

In this way, the left end of the reel 12 is directly supported by the drive shaft 33, and the right end of the reel 12 is supported by the shaft supporting member 36 via the support shaft 13.
can perform stable rotation.

In addition, when removing Patrone 1 from the VTR main body,
Either the drive shaft 33 on the TR side can be moved to the left in FIG. 6, or the cartridge 1 can be moved to the right with respect to the drive shaft 33.

As a result, the tip of the drive shaft 33 and the left end of the support shaft 13 are separated, and the support shaft 13 is moved to the left in FIG. 6 by the coil spring 29.
The support shaft 13 and the shaft support member 36 are disengaged from each other by escape from the recess 37 .

Therefore, cartridge 1 can be taken out from the VTR main body.

In summary, the cartridge of the present invention includes a casing, a reel disposed within the casing, a recording medium coaxially wound around the reel, and a device that regulates the position of the recording medium in the axial direction of the reel. Also, a reel flange having a groove formed on an end surface opposite to the recording medium, and a support that is inserted into a through hole formed in the reel and is movable relative to the reel in the axial direction. It is composed of a shaft and a coil spring that is interposed on the outer periphery of the support shaft and applies a biasing force to bias the support shaft to one side in the axial direction with respect to the reel, and is attached to a recording/reproducing device. At this time, one end of the support shaft in the axial direction is pressed in the axial direction by the drive shaft of the recording/reproducing device, thereby moving the support shaft against the biasing force of the coil spring, and The other end in the axial direction is fitted into a shaft supporting member provided on the recording/reproducing device, and the split groove is configured to be engaged with an engaging portion provided on the drive shaft. It is something to do.

As a result, both ends of the reel are supported, allowing stable rotation of the reel with a relatively simple mechanism.

Furthermore, since attachment and detachment of the cartridge can be accomplished only by relative movement of the cartridge in the axial direction, this operation becomes extremely easy.

In addition, a coil spring is installed on the outer circumference of the spindle to provide a biasing force to bias the spindle to one side in the axial direction of the reel, which is disclosed in Japanese Patent Application Laid-open No. 52-76021. Compared to the case where a leaf spring is used, the width of the recording medium can be made much larger than the width of the casing.

Furthermore, a retaining portion provided on the drive shaft of the recording/reproducing device,
For example, by engaging the pin in the embodiment with the groove formed in the reel flange, all the rotational force of the drive shaft is transmitted to the reel flange, that is, the reel, so that stable rotation is performed.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a cartridge in a time-lapse VTR. Figure 1 is a perspective view of the main parts of this time-lapse VTR, Figure 2 is a front view of the cartridge, and Figure 3 is a front view of the cartridge. Fig. 4 is a sectional view taken along line I-1 in Fig. 2, Fig. 5 is a sectional view taken along line V-v in Fig. 3, and Fig. 6 shows how to convert this cartridge into a VTR. FIG. 3 is a vertical cross-sectional view of the installed state. In addition, in the symbols used in the drawings, 2...magnetic tape, 11...casing% 12...
・Reel, 13... Spindle, 14, 15...
...Flange, 23...Through hole, 31...
...Split groove, 33... Drive shaft, 36...
・It is a shaft support material.

Claims (1)

[Scope of utility model registration request] a casing, a reel disposed within the casing,
A recording medium that is coaxially wound around this reel, and a reel that regulates the position of this recording medium in the axial direction of the reel and that has a groove formed on the end surface opposite to the recording medium. a flange, a support shaft that is inserted into a through hole formed in the reel and is movable relative to the reel in the axial direction; and a support shaft that is interposed on the outer periphery of the support shaft so that the support shaft is connected to the reel. and a coil spring that applies a biasing force to bias the support shaft to one side in the axial direction, and when installed in a recording/reproducing apparatus, one end of the supporting shaft in the axial direction is connected to the drive shaft of the recording/reproducing apparatus to the shaft. By pressing in the direction, the support shaft is moved against the biasing force of the coil spring, and the other end of the support shaft in the axial direction is fitted into a shaft support member provided on the recording/reproducing device. Also, a cartridge characterized in that the split groove is configured to be engaged with an engaging portion provided on the drive shaft.