JPH0567972U - Magnetic tape cassette - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Although the recording / playback time can be adjusted when using the winding tape stored in the magnetic tape cassette, the tape does not stick out from the drum and damage to the tape is prevented. To prevent. A magnetic tape 11 is wound around a pair of rotatable reels 9 and housed in a cassette case 7, and one reel has an inner drum 2 having a rotation receiving claw 1 and an outer circumference of the inner drum 2. A configuration having an engaging mechanism that is provided at intervals and is concentrically fitted to an outer drum 3 having a tape inlet / outlet 10 formed on an outer peripheral wall so as to be rotatable relative to each other, and that the inner and outer drums 2 and 3 are integrally rotated. Consisting of the inner and outer drums 2,
In a magnetic tape cassette capable of winding a tape around any one of the outer circumferences of the outer drum 3 and feeding the tape, a lower end portion 13 of an outer peripheral wall of the outer drum 3 and a flange outer circumference of the inner drum 2 corresponding to the lower end portion 13 By joining the parts 12 to each other in an occlusal state, it is possible to provide a magnetic tape cassette having a simple structure and a low cost configuration capable of adjusting the recording / reproducing time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic tape cassette in which a tape recording / reproducing time, that is, a tape length can be adjusted in a tape cassette in which magnetic tapes such as audio are wound and housed.

[0002]

[Prior Art]

 Conventionally, there are no tape cassettes, including rewind type and endless type, that can freely adjust the recording / playback time.The tape length that corresponds to the predetermined time is the reel. It is wrapped around and stored in the market and used. Therefore, the only option is to select and use the tape cassette for the required time according to the recording time or the playback time, and the only tape length is to be adjusted. Therefore, the applicant has already proposed in Japanese Patent Application No. 1-114169 that the recording / playback time can be freely adjusted by the tape cassette itself. This is a tape length adjustment mechanism for tape reels. It is a built-in one.The inside and outside drums of two sizes, large and small, for winding the tape on the outside and inside of one reel are provided, and the length of the tape can be adjusted by winding the tape in two stages separately on both drums. It was a thing.

[0003]

[Problems to be solved by the device]

 However, in the tape cassette using the tape reel of the inner and outer double drums, if the outer peripheral surface of the flange of the inner drum is assembled by contacting the inner peripheral surface of the outer drum having a large diameter of the take-up reel, the outer drum and the inner drum are assembled. The tape easily sticks out from the gap between the drum and the tape, resulting in dropouts and other problems that reduce reliability and pose a problem. The present invention is intended to eliminate these drawbacks, and a magnetic tape cassette that can be freely changed and used without removing the protrusion of the tape and fixing the recording / playback time without damaging the tape can be constructed easily. It is intended to be provided in an inexpensive form.

[0004]

[Means for Solving the Problems]

 According to the present invention, a magnetic tape is wound around a pair of reels rotatably provided in a cassette case and one reel is provided with an inner drum having a rotation receiving claw and an outer circumference of the inner drum. An outer drum, which is provided at intervals, is concentrically fitted to an outer drum that forms the tape inlet / outlet on the outer peripheral wall, and has an engaging mechanism that rotates the inner and outer drums integrally. In a magnetic tape cassette in which a tape can be selected and wound around an outer circumference of either the inner or outer drum, a lower end portion of an outer peripheral wall of the outer drum and a flange outer peripheral portion of the inner drum corresponding to the lower end portion. It is a magnetic tape cassette characterized by joining the occlusal state.

[0005]

[Action]

 When the adjustment button 4 of the outer drum 3 is disengaged from the inner drum 2, the reel 8 for supply is separated from the rotation, so that the tape 11 is unwound. It is performed between the inner drum 2 and the reel 9 while passing through. Further, when the adjusting button 4 is pushed into the inner drum 2, the inner drum 2 and the outer drum 3 are connected together and integrally rotate. In this state, the tape 11 is unwound and wound. This time, it will be performed by the outer drum 3 and the reel 9. The so-called one reel 8 is configured so that the tape 11 can be divided into two and can be wound. The reel 8 having the inner and outer drums 2 and 3 can be wound in two stages by dividing the tape 11 into arbitrary amounts. Since the outer peripheral lower end portion 13 of the drum 3 and the lower flange outer peripheral portion 12 of the inner drum 2 are engaged with each other to eliminate the gap, the tape does not protrude from the inner drum to the outside and the tape is not damaged safely. It can be operated with, and the recording and playback times can be adjusted freely, making it easy to handle.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1 to 5. One reel 8 in which a magnetic tape 11 is wound and housed around a pair of reels 8 and 9 rotatably provided in a cassette case 7 is described. The inner drum 2 having the rotation receiving claw 1 and the outer drum 3 provided on the outer periphery of the inner drum 2 with a space therebetween are concentrically rotatably fitted to each other. Is provided with an adjusting button 4 and an engaging convex portion 5 or a concave portion into which the adjusting button 4 can be fitted, and a lower end portion 13 of an outer peripheral wall of the outer drum 3 and a flange of the inner drum 2 corresponding to the lower end portion 13 are provided. A magnetic tape cassette is provided by joining the outer peripheral portion 12 in an occlusal state and forming a tape inlet / outlet 10 of the magnetic tape 11 on the outer peripheral wall of the outer drum 3.

In this case, normally, in the reel 8, the adjustment button 4 is disengaged from the engaging convex portion 5 of the inner drum 2 and the rotation from the tape recorder is not transmitted to the outer drum 3. Is performed between the inner drum 2 and the reel 9 while passing through the tape entrance / exit 10. Further, when the adjusting button 4 is pushed into the inner drum 2, it is locked by the engaging convex portion 5 and the inner drum 2 and the outer drum 3 are connected together to rotate integrally. The unwinding and winding of the tape 11 in this state is performed by the outer drum 3 and the reel 9 this time. In the so-called one reel 8, the tape 11 can be divided into two and wound.

As shown in FIG. 3, the adjusting button 4 is provided with a substantially L-shaped tongue piece protruding from the adjusting button 4 so that the tip end thereof can be freely swung, and the other end thereof is formed with an arcuate cut groove 15 to have spring elasticity. The action is given. Further, the adjustment button 4 is configured so that the inner and outer drums can be integrated and separated in association with the shutter 6 that is openably and closably provided in the opening 16 formed in the case 7. For example, when the adjustment button 4 is in the first position where it is fitted in the opening 16 formed in the case 7, the adjustment button 4 is separated from the engaging protrusion 5 of the inner drum and is in a stationary state. The outer drum 3 can freely rotate. In this state, the magnetic tape 11 can freely reciprocate between the inner drum 2 and the winding reel 9 over the entire length from the start end to the end of the magnetic tape 11 as in the case of a conventional general cassette tape. is there. Further, when the adjustment button 4 is pushed in to the second position where it is moved to the inner surface of the upper case and the opening 16 is closed by the slide shutter 6, the adjustment button 4 engages with the engaging convex portion 5 of the inner drum 2 and the inside and outside. The drums 2 and 3 rotate integrally, the tape 11 is wound around the outer drum 3, and the tape can be run between the outer drum 3 and the reel 9.

As for the outer drum 3, the inner peripheral side of the outer peripheral lower end portion 13 is notched in an annular shape, and the notch portion 14 has a depth to fit the flange outer peripheral portion 12 of the inner drum. In any case, the joint portion of the inner and outer drums 2 and 3 in the occlusal state is formed so that the tape 11 placed on the outer peripheral portion 12 of the flange of the inner drum 2 does not stick out into the gap or cut into the gap. However, it is considered that they are occluded in the corresponding plane of the horizontal plane. For example, instead of the cutout portion 14, the lower end portion 13 of the outer drum 3 is joined to the flange outer peripheral portion 12, or a groove is formed on the inner peripheral surface of the lower end portion 13 to form the flange outer peripheral portion 12 in the groove. Or mating.

When used as a tape cassette, a tape is run between a pair of reels 8 and 9 to be rewound and rewound for recording and reproduction. At first, the tape is played from the inner drum 2 of the reel 8 to the outer drum. The tape 11 is wound on the reel 9 through the tape inlet / outlet 10 of No. 3, and the length of the tape wound on the reel 9 is selected by pressing the adjustment button 4 at any time after the start of winding. It can be set as it is, that is, it is possible to set an arbitrary time point that can be adjusted to a required cycle. In this way, by pressing the adjustment button 4, the outer drum 3 and the inner drum 2 are united and rotated, and thereafter, the tape 11 is wound around the outer drum 3 and the reel 9. It is played back and forth between the outer drums 3. Here, the tape 11 left on the inner drum 2 cannot be pulled out of the outer drum 3 unless the adjustment button 4 is released.

The inner and outer drums 2 and 3 are engaged with a recess 17 formed in the inner drum 2 and an inner cylinder 18 of the outer drum 3 with a convex portion 19 of a ring or an undercut claw formed in the inner cylinder of the inner drum 2. The outer drum 3 and the inner drum 2 are not disengaged from each other.

It should be noted that this two-stage winding reel can be adopted and attached to both sides of the reel 8 and the reel 9, or only one of them may be adopted. Also, with this tape cassette type, when used with an auto-reverse type tape recorder, it can be used instead of an endless tape with freely adjustable cycle. In any case, regarding the adjustment of the length of the tape in the embodiment, the length can be freely changed from a small time to a few seconds to a time of 20 to 30 minutes or more, in almost stepless manner. It can be adjusted.

[0013]

[Effect of the device]

 In the present invention, one reel is concentrically rotatable with respect to an inner drum having a rotation receiving claw and an outer drum having a tape inlet / outlet formed on an outer peripheral wall with a gap provided on the outer periphery of the inner drum. In the magnetic tape cassette, which is configured to have an engaging mechanism that fits and rotates the inner and outer drums as a unit, and is capable of selectively winding and winding the tape around any of the outer and outer drums, By joining the lower end of the outer peripheral wall of the drum and the outer peripheral part of the flange of the inner drum that corresponds to the lower end, the tape does not stick out from the gap between the inner and outer drums when winding the tape. It is easy and safe to drive without damaging the tape. It also improves reliability during assembly and fixes the recording / playback time when using the magnetic tape cassette. And without, it can also be used freely instead of the required hour and minute, the preparative treatment operation even in the simple, those that can be configured easily and inexpensively produced.

[Submission date] February 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

As shown in FIG. 3, the adjusting button 4 is provided with a substantially L-shaped tongue piece protruding from the adjusting button 4 so that the tip end thereof can be freely swung, and the other end thereof is formed with an arcuate cut groove 15 to have spring elasticity. The action is given. Further, the adjustment button 4 is configured so that the inner and outer drums can be integrated and separated in association with the shutter 6 that is openably and closably provided in the opening 16 formed in the case 7. For example, when the adjustment button 4 is in the first position where it is fitted in the opening 16 formed in the case 7, the adjustment button 4 is separated from the engaging protrusion 5 of the inner drum and is in a stationary state. The outer drum 3 can freely rotate. In this state, the magnetic tape 11 can freely reciprocate between the inner drum 2 and the winding reel 9 over the entire length from the start end to the end of the magnetic tape 11 as in the case of a conventional general cassette tape. is there. Further, when the adjustment button 4 is pushed in by closing the opening 16 with the slide shutter 6 and is brought to the second position in which the adjustment button 4 is slid over the inner surface of the upper case, the adjustment button 4 becomes the engaging convex portion 5 of the inner drum 2. When engaged, the inner and outer drums 2 and 3 rotate as a unit, the tape 11 is wound around the outer drum 3, and the tape can be run between the outer drum 3 and the reel 9.

[Brief description of drawings]

FIG. 1 is a plan view showing the inside of a case according to an embodiment of the present invention.

2 is a partially cutaway plan view of the reel section of the embodiment of FIG. 1. FIG.

3 is a vertical cross-sectional view taken along the line I-I of FIG.

FIG. 4 is an enlarged vertical sectional view of a portion A in FIG.

FIG. 5 is a plan view showing one usage state of the embodiment shown in FIG.

[Explanation of symbols]

 1 Rotation Receiving Claw 2 Inner Drum 3 Outer Drum 4 Adjustment Button 5 Engagement Projection 6 Shutter 7 Case 8 Reel 9 Reel 10 Tape Entry / Exit 11 Tape 12 Flange Outer Part 13 Lower End 14 Notch

Claims (3)

[Scope of utility model registration request] 1. A magnetic tape 11 is wound and stored on a pair of reels 8 and 9 rotatably provided in a cassette case 7, and one reel 8 has an inner drum 2 having a rotation receiving claw 1. And an outer drum 3 having a tape inlet / outlet 10 formed on the outer peripheral wall, which is provided on the outer periphery of the inner drum 2 at intervals.
And concentrically rotatably fitted to each other and having an engaging mechanism for rotating the inner and outer drums 2 and 3 as one body. A tape is selected on the outer circumference of either of the inner and outer drums 2 and 3. In a magnetic tape cassette that can be wound up and fed out, a lower end portion 13 of an outer peripheral wall of the outer drum 3,
Flange outer peripheral portion 1 of the inner drum 2 corresponding to the lower end portion 13
A magnetic tape cassette characterized in that 2 and 2 are joined in an occlusal state. 2. The outer drum 3 has an outer peripheral lower end portion 13 thereof.
2. The magnetic tape cassette according to claim 1, wherein the inner peripheral side is cut out in an annular shape, and the cutout 14 has a depth for fitting the outer peripheral portion 12 of the flange of the inner drum. 3. The occlusal joints of the inner and outer drums 2, 3 are occluded at corresponding planes in a horizontal plane.
Alternatively, the magnetic tape cassette according to item 2.