JPS6336536Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette in which a rotary head drum member equipped with a rotary head is inserted into the cassette through a front opening to perform recording and reproduction on and from a built-in magnetic tape.

In conventional magnetic recording and reproducing apparatuses in which a magnetic head or a tape cassette moves to bring the magnetic head into sliding contact with the magnetic tape to load the magnetic tape, the relative positioning of the magnetic head and tape cassette is determined by the apparatus. Since this is indirect positioning via a mechanical member installed in the magnetic head, accurately determining the mutual positional relationship between the magnetic head and the tape cassette is highly dependent on the dimensional accuracy of the mechanical parts, and is also subject to changes over time and external forces. Due to the change in the shape of the parts caused by such factors, the positional relationship between the magnetic head and the tape cassette, that is, the magnetic tape, may be misaligned, resulting in a disadvantage that the device and the tape cassette are no longer compatible with each other.

The present invention was devised in view of this point, and is a tape cassette in which a rotary head drum member equipped with a rotary head is inserted into the tape from the front opening, and it is possible to directly control the relative position of the tape cassette and the rotary drum member. To provide a tape cassette that can be set to

That is, in the present invention, a guide section for regulating the winding range of the magnetic tape with respect to the tape guide circumferential surface of the rotating drum member and an engaging section for positioning the rotating head drum member are in contact with each other inside the tape cassette, and the above-mentioned guide section and rotation The device is characterized in that an abutting portion for regulating the relative position with the head drum member is fixed inside.

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

FIG. 1 shows a plan view of an example tape cassette according to the present invention with the upper half removed.
1a is a tape cassette, 1a is a lower half, 2 is its front opening, and 3 [3a, 3b] are reel hubs arranged at symmetrical positions in the lower half 1. They are positioned so that there is approximately a predetermined distance between the axes. 4 [4a, 4b] are guide rollers rotatably pivoted on both sides of the front opening 2, and a guide body 5 is installed between the guide rollers 4a, 4b.
Together with the guide roller 4, it forms a tape path 6 for the magnetic tape T wound between the reel hubs 3a and 3b.

Next, the guide body 5 will be explained in detail, but in order to facilitate understanding, a rotating drum member equipped with a rotating head applied to the tape cassette of this embodiment will be explained with reference to FIG. In Fig. 2, 11 and 12 are upper and lower fixed drums.
The opposing surfaces 11a and 12a of the fixed drums 11 and 12 are inclined at a required angle, and the circumferential surface of this fixed drum is formed perpendicular to the inclined surface of the opposing surface. Drums 11, 12
Flanges 11c and 12c are formed to protrude outward from the circumferential surfaces of the tape guide surfaces 11b and 12b. A rotating magnetic head 13 is attached to a rotating disk 14 and is arranged between the fixed drums 11 and 12, that is, between the inclined surfaces 11a and 12a, and is rotated along the inclined surfaces 11a and 12a of the fixed drums 11 and 12. . In this way, a rotary head drum member is constructed from the upper and lower fixed drums 11, 12 including flanges and the rotary disk 14 to which the rotary magnetic head 13 is attached. This rotating head drum member is inserted inward from the front opening 2 of the tape cassette 1, and is formed to have a thickness corresponding to that of the guide body 5.

Incidentally, this rotary head drum member may be formed to have such a thickness that only a portion thereof can be inserted into the front opening 2 of the tape cassette 1. In FIG. 2, 15 is a rotating shaft on which the rotating disk 14 is attached, and 16 is a rotating shaft 1.
A bearing housing that holds a bearing that rotatably supports the drum 5, and is integrally formed with the lower fixed drum. 17 is a drum support member for fixing the upper fixed drum 11 and the lower fixed drum 12, and 18 is a motor disposed at the lower part of the bearing housing 16 and attached to the rotating shaft 15.
In the rotating head drum member configured in this way, the rotating shaft 15 rotates due to the rotation of the motor,
As a result, the rotating disk 14 rotates, the rotating magnetic head 13 rotates diagonally with respect to the upper and lower fixed drums 11 and 12, and winds the tape around the tape guiding surfaces 1b and 12b formed by the fixed drums 11 and 12. The rotating magnetic tape T is scanned in a circular motion.

The guide body 5, which positions the rotary head drum member constructed as described above in the tape cassette 1 and guides the magnetic tape T to be wound around the tape guiding surface of the rotary head drum member, is shown in FIGS. 3 and 3 as an example. It is configured as shown in Figure 4. That is, vertical guide portions 7 [7a, 7b] facing the tape path 6 of the tape cassette 1 are formed on both sides, and upper and lower fixed drums 11 of the rotating head drum member are formed in the center.
Recessed portion 8 having a larger diameter than the flanges 11c and 12c of 12
A fixed drum 1 is formed at both ends of this recess 8.
An inclined guide portion 9 [9a, 9b] is formed in which flanges 11c and 12c of 1 and 12 are abutted against each other. This guide body 5 is connected to the tape cassette 1.
It is fixed to the lower half of the body by screws or adhesive.

Of course, this guide body 5 may be fixed to the upper half. Also, in this way, the guide body 5
Instead of forming the guide body 5 separately from the cassette half and fixing it to the half, the guide body 5 can be formed integrally with either the upper or lower half. When the guide body 5 is formed separately from the cassette half as in this example, the contact resistance with the magnetic tape T can be reduced by forming the guide body 5 from a slippery material.

In FIG. 1, reference numeral 10 denotes a lid provided to cover the front opening of the tape cassette;
0 is configured so that it can be opened either upward or downward relative to the front opening.

The present invention is not limited to the above-described embodiments, and the configuration of the tape cassette, particularly the configuration of the guide body and the configuration of the rotating head drum member applied to this tape cassette, may be changed without departing from the spirit of the present invention. Needless to say.

As described above, according to the present invention, in the tape cassette in which the rotary head drum member is inserted into the interior through the front opening for recording and reproduction, the relative positional relationship between the rotary head drum member and the tape cassette can be determined on the magnetic recording and reproducing device side. Since this is done directly by colliding the rotating head drum members in the tape cassette without any mechanical restriction, the mutual positional relationship can be determined accurately and there is no misalignment of the positional relationship between the rotating magnetic head and the tape. Moreover, there is no problem in mutual compatibility between the magnetic recording/reproducing device and the tape cassette, and the magnetic tape built in the tape cassette can be reliably recorded and reproduced, and the device has a positioning mechanism. Since there is no need to provide this, the configuration of the device is simplified and the cost is reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an example of a tape cassette according to the present invention with the upper half removed, Fig. 2 is a front view of a rotating head drum member applied to the tape cassette of the present invention, and Fig. 3 is a tape cassette according to the present invention. FIG. 4 is a plan view of an example of a guide body attached to a cassette, and FIG. 4 is a front view thereof. In the figure, 1 is the tape cassette, 2 is the front opening, and 5 is the tape cassette.
is a guide body, 7 [7a, 7b] is a vertical guide part,
9 [9a, 9b] are inclined guide parts, 11 and 12 are upper and lower fixed drums, 11a and 12a are inclined opposing surfaces,
11b, 12b are tape guide peripheral surfaces, 11c, 12
C is a flange, 13 is a rotating head, and T is a magnetic tape.

Claims (1)

[Scope of utility model registration request] A tape guide circumferential surface, a rotary head that scans diagonally with respect to the tape wound around the tape guide circumferential surface, and a positioning engagement formed to protrude outward from the tape guide circumferential surface. In a tape cassette in which a rotary head drum member consisting of parts is inserted into the inside from the front opening, a pair of guide parts regulates the winding part of the tape wound around the tape guide circumferential surface, and a pair of guide parts for regulating the winding part of the tape wound around the tape guide circumferential surface, and a pair of guide parts for regulating the winding part of the tape wound around the tape guide circumferential surface, and A tape cassette having an abutment portion fixedly provided inside the abutment portion for regulating the relative position of the guide portion and the rotary head drum member by abutting the abutment portion.