JP2569148B2 - Loading mechanism of magnetic recording / reproducing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading mechanism for a helical scan type magnetic recording / reproducing apparatus, and more particularly to a loading mechanism suitable for reducing the size and weight of the apparatus.

[Conventional technology]

In a loading mechanism that winds a magnetic tape around a rotating cylinder equipped with a magnetic head, a tape guide member is disposed so as to fit compactly into an opening of a tape cassette at an unloading position. It is arranged so as to form a compact tape path while ensuring running performance. Accordingly, each tape guide member needs to change its relative position with respect to the loading ring between the loading position and the unloading position.

In order to make the positions of the plurality of tape guide members relatively different with respect to the loading ring between the loading position and the unloading position in this way, rather than using a mechanism for guiding each of them on an independent path, each of the predetermined It is advantageous in terms of simplification and miniaturization of the loading mechanism to share these routes until the vehicle approaches the position and to branch each route immediately before the completion of the guidance.

One method for achieving this is disclosed in Japanese Patent Laid-Open No. 57-2095.
As described in Japanese Patent Publication No. 7 (1995), providing a common path and a path branched in the middle by a guide plate, and urging the pinch roller and the guide roller to be branched to each other in the direction in which the guide plate branches. , There is a method of branching to each loading position.

[Problems to be solved by the invention]

However, the above-mentioned prior art requires a guide plate having a complicated shape and occupying a large space, and thus has problems in reducing the size, weight, and assemblability of a magnetic recording / reproducing apparatus.

An object of the present invention is to provide a loading mechanism of a magnetic recording / reproducing apparatus which solves such a problem, guides a tape guide member without using a guide plate, and can realize a reduction in size and weight of the entire apparatus. Is to do.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, the first and second guide bases on which a tape guide member is mounted move substantially the same path from the unloading position as the loading ring rotates. A guide member is provided near one of the first and second catchers where the second guide base is positioned, and abuts on the guide member on one of the first and second guide bases. A contact member is provided, and the contact member serves as a member for positioning and contacting the corresponding catcher when loading is completed.

[Action]

When the first and second guide bases move along substantially the same path due to the rotation of the loading ring, when the contact member comes into contact with the guide member, the contact member is regulated by the guide member. Thereby, the movement path of the guide base provided with the contact member is regulated by the guide member. The other guide base having no such abutting member moves as it is, and therefore the movement path of the first and second guide bases is branched. When the loading is completed, the contact member functions as a member for positioning and contacting the corresponding catcher.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing one embodiment of a loading mechanism of a magnetic recording / reproducing apparatus according to the present invention, wherein 1 is a chassis, 2 is a rotating cylinder, 3 is a magnetic tape, 4 is a tape cassette, and 5 is a take-up reel. , 6 is a supply reel, 7, 8, 9 are guide rollers, 10 is a loading ring, 11 is a guide roller, 12 is a guide arm, 13 is a correction guide pin, 14 is a capstan, 15 is a pinch roller, and 16 is a tension pin. ,
17, 18, and 19 are guide bases, 20 and 21 are catchers, and 22 is a loading motor.

In this figure, here, the unloading stop state in which the tape cassette 4 indicated by the one-dot chain line is mounted on the magnetic recording / reproducing apparatus is shown. A take-up reel 5 and a supply reel 6 around which the magnetic tape 3 is wound are housed inside the tape cassette 4, and each of them is mounted on a reel base (not shown) rotatably supported on the chassis 1. It is placed and engaged.

A cylindrical rotary cylinder 2 on which a plurality of magnetic heads (not shown) are mounted is mounted on a chassis 1 on a disk.
However, a loading ring 10 is arranged therearound, and furthermore, a capstan 14, a tension pin 16, a correction guide pin 13, a pinch roller 15, guide rollers 7, 8, 9, 11, which are tape guide members, and a loading motor 22. And other components are arranged as shown.

In this state, the loading ring 10 points to the arrow A ₁₀
The guide base 17 on which the guide roller 7 is mounted and the guide base 18 on which the guide rollers 8 and 9 are mounted move, and the guide arm 12 rotates to rotate
The guide base 19 on which the tape 11 is mounted moves, and the magnetic tape 3 stretched on the front surface of the tape cassette 4 is pulled out by the movement of these tape guide members. When the guide base 17 is pressed against the catcher 20 and the guide base 18 is pressed against the catcher 21, the magnetic tape 3 is wound around the rotary cylinder 2 at a predetermined angle, as shown in FIG. A tape traveling path is formed. The operation of the device is performed in a state where the traveling route is held.

FIG. 3 is an enlarged plan view showing a state during the loading operation of this embodiment, where 10-a and 10-b are pins, 10-
c, 10-d are projections, 17-a is a pin, 17-b is a projection, 18-
a is a pin, 18-b is a protrusion, 20-a and 21-a are engagement grooves, 2
Reference numerals 3 and 24 denote spring members, and reference numerals 25, 26 and 27 denote support members, and portions corresponding to those in FIG.

In the figure, the loading ring 10 is provided with support members 25, 2
Rotated supported by 6,27. Pins 10-a and 10-b are press-fitted at predetermined intervals on the loading ring 10. The pins 10-a are inserted into slots formed in the guide base 17, and the pins 10-b are Each is engaged with a long hole provided in the base 18. Also, the guide bases 17, 18 placed on the loading ring 10 as described above.
Are provided with projections 17-b and 18-b, respectively.
b and a projection 10-c provided on the loading ring 10, and a spring member 24 between the projection 18-b and the projection 10-d also provided on the loading ring 10. Are independently suspended, and the guide bases 17,1
The position of the 8 with respect to the loading ring 10 is regulated.

Because of the consuming mounting relationship with the guide base 17, 18 with respect to the loading ring 10, from the loading ring 10 is state of FIG. 1, as described above, by being rotated in the arrow A ₁₀ direction, the guide base 17,18 follow the same loading path and move similarly. By this operation,
As shown in FIG. 1, the magnetic tape 3 is gradually wound around the rotary cylinder 2 as shown in FIG. 3 from a state of being stretched over the front surface of the tape cassette 4. And
The pin 17-a implanted in the guide base 17 is
The pin 18 implanted in the guide base 18 is inserted into the engagement groove 20-a.
-A engages with the engagement groove 21-a of the catcher 21, respectively.
The loading operation in which the guide bases 17 and 18 are positioned at the loading position is completed.

FIG. 4 is an enlarged plan view of the catcher 21 in FIG. 3,
FIG. 5 is a side view as seen from the direction of arrow a4 in FIG. ₄ , in which 18-c is a pin, 21-b is a loading completion position, and 21-c is a guide member. Corresponding parts have the same reference characters allotted.

In FIG. 4 and FIG.
Is rotated, and the pins 18-
When a is engaged with the guide member 21-c forming a part of the catcher 21, the guide rollers 8, 9 rotate while sliding along the pins 10-b, and the relative position with respect to the loading ring 10 changes. . The force of the spring member 24 generated by this is
As shown in FIG. 6, the guide member 21-c has a pin
The guide base 18 branches to the catcher 21 because it acts to guide the 18-a along the engaging groove 21-a of the catcher 21 to the loading completion position 21-b.

FIG. 7 is an enlarged plan view showing a state in which the guide base 18 has reached the loading position, and FIG. 8 is a side view seen from the arrow a7 side in FIG. ₇ and corresponds to FIG. 4 and FIG. Parts are given the same reference numerals.

7 and 8, a spring member 24 generates a posture supporting force for recording and reproduction of the guide base 18, and the pin 18-a
Also serves as a posture support member of the guide base 18, and the parts are shared.

On the other hand, in FIG. 3, the guide base 17 has pins 18-a (FIGS. 4 and 5) of the guide base 18 which engage with the guide members 21-c (FIG. 4) of the catcher 21. a member is not provided, Therefore, in accordance with rotation a ₁₀ of the loading ring 10 as it reaches the catcher 20, as shown in Fig. 9 and FIG. 10 (a ninth FIG viewed from a9 direction) Loading is completed. Further, as in the case of the guide base 18, the spring 23 generates the supporting force of the posture of the guide base 17 at the loading position, thereby achieving the dual use of parts.

As described above, instead of the guide plate, by providing the shapes of the guide base and the catcher, and the spring members and the pins, a common loading path is formed for each guide base without providing the guide plate. Further, the operation of branching these guide bases can be performed accurately.

〔The invention's effect〕

As described above, according to the present invention, each of the tape guide members can be respectively formed along a desired path by omitting the guide plate which has conventionally been required to be formed in a complicated shape and installed over the entire area of the loading path. It can be moved, and it is possible to use it without using a positioning member for the catcher, especially when loading is completed. Therefore, the assemblability is improved with a simple configuration, the number of parts is reduced, and the size is reduced.
A lighter loading mechanism can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing an unloading state of the entire configuration of an embodiment of a loading mechanism of a magnetic recording and reproducing apparatus according to the present invention, FIG. 2 is a plan view showing the same loading state, and FIG. FIG. 4 is a plan view showing the catcher portion during the loading operation, FIG. 4 is an enlarged plan view showing the loading operation of one of the guide bases in FIG. 3, FIG. 5 is a side view thereof, and FIG. FIG. 7 is an explanatory view showing a branching operation of the guide base path shown in FIG. 7, FIG. 7 is a plan view showing an enlarged state of the guide base shown in FIG. 4 at the time of completion of loading, FIG. FIG. 9 is an enlarged plan view showing the state when the loading of the other guide base in FIG. 3 is completed, and FIG. 10 is a side view thereof. 2 ... rotating cylinder, 3 ... magnetic tape, 4 ... tape cassette, 5 ... take-up reel, 6 ... supply reel, 7,
8,9 …… Guide roller, 10 …… Loading ring, 10
-A, 10-b are pins, 11 ... guide rollers, 17 ... guide base, 17-a ... pins, 18 ... guide base, 18-a,
18-c pin, 20, 21, catcher, 21-a engagement groove, 21-c guide member, 23, 24 spring member.

Claims (1)

(57) [Claims] A rotating cylinder mounted with a magnetic head;
And a first and a second guide base (17, 17) each having a tape guide member (7, 8, 9) mounted thereon and moving with the rotation of the loading ring (10). 18) and first and second catchers (20, 20) for positioning the first and second guide bases (17, 18).
21) and the first and second guide bases (17, 1).
By the movement of 8), the tape guide members (7, 8, 9) pull out the magnetic tape (3) from the tape cassette (4), and the first and second guide bases (17, 18) respectively move the first and second guide bases (17, 18). A loading mechanism for a magnetic recording / reproducing apparatus wherein the magnetic tape (3) is wound around the rotary cylinder (2) at a predetermined angle while being positioned by the second catcher (20, 21); , The second guide bases (17, 18) move substantially the same path from the unloading position, and the first and second guide bases (17, 18) correspond to the corresponding first and second catchers (20). , 21), a contact member (18-a) that diverges the movement path near the loading position so as to contact and position.
It is provided on one of the first and second guide bases (17, 18), and the corresponding contact member (18-a) is used as a member for positioning and contacting the corresponding catcher when loading is completed. Characteristic loading mechanism of magnetic recording and reproducing device.