JPH0567976U - Magnetic tape cassette - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] The recording / playback time can be adjusted, but the winding disorder of the tape wound on the reel is reduced and damage to the tape is prevented. [Structure] A magnetic tape 11 is wound and housed in a cassette case 7 around a pair of rotatable reels 8 and 9, and one reel 8 is provided with an inner drum 2 having a rotation receiving claw and the inner drum 2 of the inner drum 2. Tape entrance / exit 1 provided at intervals around the circumference
0 is formed on the outer peripheral wall of the outer drum 3 concentrically and rotatably fitted to each other, and the inner and outer drums 2 and 3 are integrally rotated. In a magnetic tape cassette in which a tape can be selected and wound around any one of the outer circumferences of the reels, and for vertical position regulation around a hub hole into which a hub having a rotation receiving claw of the other reel 9 is fitted and supported. The rib 20 is provided on the inner surface of the case 7 so as to project.

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 with tape cassettes.The tape lengths that correspond to the predetermined time are reels. It is rolled up and stored in the market and used on the market. 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 a tape cassette that uses a tape reel with double-drum inner and outer drums that has the time adjustment function, the thickness of the reel with the time adjustment function is thicker than that of the reel without the time adjustment function. If the inner size of the case is set according to the reel, the tape wound on the other reel that does not have a time adjuster is liable to be disturbed, especially because the vertical clearance in the case differs between the reels. Disturbance of the tape during running due to the influence of the internal dimensions of the case is severe, and dropouts due to damage to the tape reduce reliability and cause problems. The present invention is intended to eliminate these drawbacks, and it is possible to configure a magnetic tape cassette that can be freely changed and used without eliminating winding disorder of the tape, fixing the recording / playback time without fixing the tape. 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 engagement mechanism that is concentrically rotatably fitted to an outer drum that is provided at intervals and that forms a tape inlet / outlet on the outer peripheral wall, and that rotates the inner and outer drums 2 and 3 integrally, that is, time. In a magnetic tape cassette having a structure having an adjusting mechanism and capable of selectively winding a tape around the outer circumference of any one of the inner and outer drums 2 and 3, a hub having a rotation receiving claw 1 of the other reel 9 is used. The magnetic tape cassette is characterized in that a vertical position regulating rib 20 is provided on the inner surface of the case 7 so as to project around the hub hole 19 to be fitted and supported.

[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. It is a so-called one reel that can be divided into two tapes to be wound, and it is possible to wind the tape in two steps on the reel with inner and outer drums and to wind it in two stages. The reel 11 on one side and the reel 9 on the other side not having a time adjustment mechanism have equal vertical clearances in the case 7, and the tape 11 wound from one reel 8 to the other reel 9 is wound. It can be operated safely without disturbing the tape without damaging it, and the recording and playback times can be adjusted freely, making it easy to handle.

[0006]

【Example】

 1 to 6, an embodiment of the present invention will be described. 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. The adjusting button 4 and the engaging convex portion 5 or the concave portion into which the adjusting button 4 can be inserted, and the engaging mechanism for rotating the inner and outer drums 2 and 3 as a unit. A tape inlet / outlet 10 of the magnetic tape 11 is formed on the outer peripheral wall of the outer drum 3, and a vertical position is provided around a hub hole 19 for mounting and supporting a hub having the rotation receiving claw 1 of the other reel 9. The regulating rib 20 is provided on the inner surface of the case 7. There the magnetic-tape cassette and set.

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. In this state. The unwinding and winding of the unwinding tape 11 is performed by the outer drum 3 and the reel 9 this time. The tape 11 can be divided into two and wound in a so-called one reel.

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 the outer drum 3 Is stationary. In this state, the magnetic tape 11 can freely reciprocate between the inner drum 2 and the take-up 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. Further, when the adjustment button 4 is pushed in and moved to the inner surface of the upper case to the second position 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 , 3 rotate integrally, the tape 11 is wound around the outer drum 3, and the tape can run between the outer drum 3 and the reel 9.

As the position regulating rib 20, as shown in FIGS. 4 to 6, the hub hole center is formed on the outer peripheral side of the bearing wall 19 ₁ around the hub hole 19 into which the reel 9 having no time adjusting mechanism is inserted. A plurality of radial or ring-shaped projections are provided on the inner surface of the case 7, and the top surface of the rib 20 has a rounded arcuate cross section as necessary as shown in FIG. Care has been taken to ensure that the winding edges can be aligned without causing any damage.

The seat 21 shown in FIGS. 7 to 8 may be used in the case 7. For example, a case in which the reel 8 having the time adjusting mechanism of the reel is incorporated in one side and the reel 9 not having the time adjusting mechanism is incorporated in the other side, there is a difference in size in the vertical size inside the case. In the case where a certain one is used, a seat 22 having a step portion 22 in the middle portion is provided between the case 7 and the reels 8 and 9 so that the vertical clearance in the case is equalized to the left and right. Consideration should be given not to disturb the winding of the tape wound on the reel.

When used as a tape cassette, a tape is run between a pair of reels 8 and 9 to be wound up and rewound for recording and reproduction. 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 left on the inner drum 2 cannot be pulled out of the outer drum 3 unless the adjustment button 4 is removed.

The inner and outer drums 2 and 3 engage with the recess 17 formed in the inner drum 2 by engaging the inner cylinder 13 of the outer drum 3 with the ring protrusion 14 formed in the inner cylinder 12 of the inner drum 2. It is taken into consideration that the drum 3 does not come out of the fitted state with the inner drum 2.

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]

 According to the present invention, one reel is concentrically and rotatably fitted to an inner drum having a rotation receiving claw and an outer drum having a tape inlet / outlet formed on a wall with a gap provided on the outer periphery of the inner drum. In the magnetic tape cassette that is equipped with an engaging mechanism that rotates the inner and outer drums as a unit, the tape can be selected and wound around the outer circumference of one of the inner and outer drums, and then fed out. A vertical position regulating rib is projected on the inner surface of the case around the hub hole that fits and supports a hub with rotation receiving claws, so the tape is not disturbed due to the internal dimensions of the case and handling is easy. In addition, the tape can be operated without damaging it, the reliability at the time of assembly is also improved, and the recording / playback time is not fixed when using the magnetic tape cassette when needed. Freely changed also can be used in, the handling operations also I convenient der, are 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 has a substantially L-shaped tongue projectingly provided, and an arcuate cut groove 15 is formed along the outer circumference on the side where the adjusting button 4 is provided to form a spring elastic member. 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 the outer drum 3 Is stationary. In this state, the magnetic tape 11 can freely reciprocate between the inner drum 2 and the take-up 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. 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 of an embodiment of the present invention.

FIG. 2 is a plan view showing the inside of the case of the embodiment of FIG.

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

FIG. 4 is a plan view showing the case of FIG.

5 is an enlarged vertical sectional view taken along the line II-II of FIG.

6 is an enlarged vertical sectional view taken along the line III-III in FIG.

FIG. 7 is a plan view of a seat used in an embodiment of the present invention.

8 is a longitudinal sectional view of the embodiment of FIG.

[Explanation of symbols]

 1 Rotation Receiving Claw 2 Inner Drum 3 Outer Drum 4 Adjusting Button 5 Engagement Convex 6 Shutter 7 Case 8 Reel 9 Reel 10 Tape Entry / Exit 11 Tape 12 Inner Cylinder 13 Inner Cylinder 14 Ring Convex 19 Hub Hole 20 Position Control Rib 21 Seat 22 Step

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 which is provided on the outer periphery of the inner drum 2 with a space therebetween and has a tape inlet / outlet formed on the outer peripheral wall concentrically and rotatably fitted to each other, and the inner and outer drums 2 and 3 are integrally formed A hub having a rotation receiving claw 1 of the other reel 9 in a magnetic tape cassette having a structure having a rotating engagement mechanism and capable of winding a tape around the outer periphery of one of the inner and outer drums 2 and 3 and feeding it out. Ribs 2 for vertically controlling the position around the hub hole 19 for fitting and supporting
A magnetic tape cassette in which 0 is provided on the inner surface of the case 7. 2. A plurality of the position regulating ribs 20 are provided on the inner surface of the case in a radial pattern centering on the hub hole on the outer peripheral side of the support wall 19 ₁ around the hub hole 19 into which the reel 9 is fitted. The magnetic tape cassette according to claim 1. 3. The magnetic tape cassette according to claim 1, wherein a sheet having a step portion at an intermediate portion is provided between the case and each reel, the sheet being used in the tape cassette.