JPH0567975U - Magnetic tape cassette - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To facilitate safe, smooth and convenient handling of time adjustment of magnetic tape cassettes that can adjust recording and playback times. [Structure] A magnetic tape 2 is wound and housed in a cassette case 1 around a pair of rotatable reels 3 and 4, and an interlocking operation is provided on the reel 3 with an adjusting button 6 for stopping tape feeding and a control pin 7. The case 1 is provided with a plate 5 and has an opening 14 into which the adjustment button 6 is fitted when the tape running is stopped.
The slider 14 ₁ is provided in the opening portion 14 so as to be openable and closable, and the slippery sheet 16 is provided on the inner surface of the case of the passageway portion of the adjustment button 6 so that the adjustment button can be set. It does not catch on the edge of the seat when passing through the opening, and it operates smoothly and quietly without any operating noise that directly rubs against the case, which simplifies handling operations and reduces malfunctions and is more reliable. It can be a magnetic tape cassette.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic tape cassette provided with a mechanism capable of adjusting the recording / reproducing time of a tape in a tape cassette in which magnetic tapes such as audio are wound and housed.

[0002]

[Prior Art]

 Conventionally, the tape cassette itself is capable of freely adjusting the recording / reproducing time, and the one previously proposed by the present applicant (Japanese Patent Application No. 2-72496) has a control button and a recess in the tape supply reel. The interlocking plate with the tape control pin is rotatably fitted, and the adjusting button is engaged with and disengaged from the connecting convex part provided in the recess, so that the supply reel and the interlocking plate can rotate integrally or relatively. There are tape cassettes that stop the tape feeding at a predetermined position.

[0003]

[Problems to be solved by the device]

 However, in order to loosely fit and support the interlocking plate that engages and disengages with the supply reel for stopping the feeding of the tape at an arbitrary position in the length direction of the tape, the feeding stop position once set. When changing or canceling the setting, the adjustment button is fitted into the case opening and resets, so a cutout hole is also required in the liner interposed in the case. When the adjustment button passes, it will be caught on the notched edge of the seat and smooth operation will be hindered, and it may be possible to make the liner shape so that the adjustment button does not get caught. The adjustment button was directly rubbed with the case, and there was a problem that the rubbing noise during operation was noisy. The present invention seeks to eliminate these drawbacks properly, and it is a magnetic tape cassette that has an interlocking plate on the supply reel that allows adjustment of the recording / playback time. The purpose of the present invention is to provide an inexpensive magnetic tape cassette that does not get caught in the liner of the adjustment button for operation of the device, does not generate sliding noise with the case, and has a simple structure. ..

[0004]

[Means for Solving the Problems]

In the present invention, a magnetic tape 2 is housed in a cassette case 1 by being wound around a rotatable supply reel 3 and a take-up reel 4, and the supply reel 3 is provided with an adjusting button 6 for stopping tape feeding and a control pin 7. In addition to the interlocking plate 5 having an opening, the case 1 is provided with an opening 14 into which the adjusting button 6 is inserted when the tape running is stopped, and a slider 14 ₁ is provided in the opening 14 so as to be openable and closable. The magnetic tape cassette is characterized in that a slippery sheet 16 is arranged on the inner surface of the case of the passageway portion of the adjusting button 6.

[0005]

[Action]

The interlocking plate 5 in the recess 13 of the supply reel 3 is rotatably fitted so as not to be pulled out or disengaged in the axial direction by the locking portion 9, and the adjustment button 6 is When in the first position (reset) fitted in the opening 14 formed in the slot 1, the interlocking plate 5 is separated from the supply reel 3 and is in a stationary state, and the end of the control pin 7 is The parts are located radially outwardly of the magnetic tape 2, while the supply reel 3 is free to rotate. In this state, the magnetic tape 2 can freely reciprocate between the supply reel 3 and the winding reel 4 over the entire length from the start end to the end of the magnetic tape 2. Further, pushing the control button 6, when closing the second position was mole on the inner surface of the case and (set) the opening 14 in the slider 14 _1, a supply reel 3 and engages with the projection 15 of the supply reel 3 The interlocking plate 5 rotates together and the adjustment button 6 moves along the slippery sheet 16. Since the control pin 7 also rotates at the same time as the rotation of the interlocking plate 5, the end of the control pin 7 which is located away from the outermost portion of the tape 2 wound around the supply reel 3 also extends in the tangential direction. Move toward the tape. When the end of the control pin 7 engages with the tape portion extending in the tangential direction and the supply reel 3 and the interlocking plate 5 further rotate, the control pin 7 swings around the bearing and the interlocking plate 5 rotates. Move with. Therefore, the tangentially extending portion of the tape 2 is pulled in the rotation direction of the supply reel 3 by the end of the control pin 7, so that the tension acting on the tape 2 increases and the tension detecting mechanism of the tape recorder (Fig. (Not shown) will stop the tape 2 from running, but the adjustment button 6 will pass smoothly without catching on the seat, and no rubbing noise with the case will occur during operation, ensuring a quiet operation. And the appearance of the case can be improved.

[0006]

【Example】

 1 to 5, the tape cassette is wound around a cassette case 1 and a pair of a supply reel 3 and a take-up reel 4 which are rotatably housed therein. And a magnetic tape 2 that has been formed. Each of the reels 3 and 4 can be either a supply side or a winding side depending on the running direction of the magnetic tape 2, but the supply reel 3 and the winding reel 4 have a predetermined length with one end fixed respectively. The magnetic tape 2 is wound. The supply reel 3 is integrally formed with a projection extending radially inward at the center thereof to receive rotation from the tape recorder, and a recess 13 is formed inside the winding drum portion of the reel 3. ing. The cylindrical inner wall defining the recess 13 is provided with a plurality of locking projections 15 projecting radially inward at equal intervals, one of which is a tape end fixing. Part is formed.

An annular interlocking plate 5 is rotatably fitted in the recess 13 of the supply reel 3 by a locking portion 9. The interlock plate 5, the annular flange portion 5 ₂ which is projected outward in the upper edge of the cylindrical wall 5 ₁ made of a synthetic resin material, and an annular flange portion 5 ₃ which is protruded inward the lower edge those donut-shaped having, on an upper surface outer peripheral portion of the annular flange portion 5 ₂ is provided with a control pin 7, adjusted by through the support portion ₆₁ on the outer periphery thereof diametrically opposite button 6 Is integrally formed of a flexible material such as a synthetic resin material or provided via a spring.

[0008] In this case, the Regulatory button 6 has a projection 6 ₂ sliding on the top surface, when it slipped push above cases the inner surface, the contact area to allow the less to enable smooth sliding In consideration of this, a cam portion for locking is formed on the bottom surface so that it can come into contact with the convex portion 15 of the concave portion 13. Although adjustment button 6 is one that is projected to the interlocking plate 5 top and through the elastic support section _61, the control button 6, folded bent rising outer circumferential direction from the upper surface of the continuous rotation plate 5 It is preferable that the spring action is effectively provided to the adjustment button 6 by being projected. In addition, it is considered that the annular interlocking plate 5 is formed with an arcuate cut groove 8 along the outer periphery on the side where the adjustment button 6 is provided, if necessary, to make the flexibility even more effective. .

[0009] Incidentally, the control pin 7 has a base portion ₇₁ which is rotatably supported pivot parallel shaft hole to the axis of rotation of the supply reel 3, a portion沿在bent at a right angle from the bearing portion, the shaft to further And a tip 7 ₂ extending downward in parallel with the hole. Then, the control pin 7 to pivot around the shaft hole, the distal end 7 ₂ can and child contact with the surface of the magnetic tape 2. Further, the movement range of the control pin 7 in which the position when the tape running is stopped is set so that the tape winding diameter variation can be all over. That is, it is considered that the control pin 7 is formed so as to stop in the range from the position on the winding core side of the hub (empty hub) to the position outside the maximum winding diameter (full hub).

A slippery sheet 16 is provided on the inner surface of the case of the passage of the adjustment button 6 provided on the interlocking plate 5, and the sheet is to be caught at the end of the sheet when passing through the opening 14. There is no need to rub the case directly to ensure smooth operation. In this case, the slippery sheet 16 is a ring-shaped sheet made of ultra-high density polyethylene, which is concentrically arranged with a notch corresponding to the opening 14 around the hub hole in the upper case. Also, as shown in FIG. 5, the slidable sheet 16 is fitted in a circular hole 18 formed in a liner 17 which is provided around the hub hole and is provided in the case. May be taken into consideration. Further, it is also effective to attach a similar slippery sheet 16 ₁ to the inner surface of the slider 14 ₁ provided in the opening 14.

Further, the locking portion 9 is a ring convex portion or an undercut claw protrudingly provided on the outer periphery of the drum inner cylindrical portion 3 ₁ of the supply reel 3, and is the cylindrical wall 5 _{1 of the} interlocking plate 5. intended to be engaged in the annular flange portion 5 ₃ formed on the lower edge of the interlocking plate 5 has a rotatably fitted to extraction prevention structure in the recess 13.

The interlocking plate 5 housed in the recess 13 of the supply reel 3 has its center hole loosely fitted in the inner cylindrical portion 3 ₁ formed in the supply reel 3. _It is positioned in the up-down direction by a locking portion 9 protrudingly provided on ₁ , so that it can rotate stably. When the adjusting button 6 is in the first position (reset), that is, when it is fitted in the opening 14 formed in the case 1, the interlocking plate 5 engages with the convex portion 15 formed in the supply reel 3. It is possible to rotate the supply reel 3 relative to the supply reel 3 about the rotation axis thereof. The magnetic tape can freely reciprocate between the supply reel 3 and the take-up reel 4. Further, when the adjustment button 6 is pushed downward to the second position (set), that is, when the adjustment button 6 also digs into the inner surface of the case 1, the bottom surface of the adjustment button 6 provided on the interlocking plate 5 causes the supply reel 3 to move. By engaging with one of the convex portions 15 formed on the above, the relative rotation between the interlocking plate 5 and the supply reel 3 becomes impossible. Incidentally, when the allowed moles adjustment button 6 to Ueke over scan the inner surface, the opening 14 of the case 1 is made so as not interfere with the rotation operation of the interlock plate 5 is closed by sliders 14 ₁ serving as a shutter.

The opening 14 can be selected depending on the position where the adjusting button 6 is provided, but as shown in FIG. 1, it may be a rectangle formed between the supply reel 3 and the take-up reel 4, or a fan shape along a concentric line. Alternatively, the slider 14 ₁ may be slid on the arc as the opening 14.

For example, when it is desired to repeat the reproduction only within a specific range of the entire length of the already recorded magnetic tape 2, the tape length adjusting device is operated at the last magnetic tape position to be reproduced. First, the tape cassette is loaded into the tape recorder and a reproducing operation is performed. When the end of the reproduction target range is reached, the tape running is stopped. The cassette tape is taken out from the tape recorder, the adjusting button 6 is pushed in to the second position, and the opening 14 is closed by the slider 14 ₁ . Then, the tape cassette is reloaded into the tape recorder. Operate the tape recorder, and play or fast forward the tape cassette to run it in the same direction as it was before removal. In response to rotational force from the tape recorder, the supply reel 3 starts to rotate in the counterclockwise direction, the projection 15 of the supply reel 3 in contact next to adjustment button 6 is immediately engaged with the cam portion 6 ₃ of control buttons 6 Together, the supply reel 3 and the interlocking plate 5 rotate integrally, and the adjustment button 6 can pass over the slippery sheet 16 without being caught at the sheet end and can act on the tape 2 with the control pin 7. The tension is increased and the tape running is stopped.

When the tape 2 is rewound from the take-up reel 4 to the supply reel 3 in this state, the adjustment button 6 is at the second position where the adjustment button 6 is pushed, so that the supply reel 3 and the interlocking plate 5 are integrated. And rotate clockwise. When the supply reel 3 rotates almost once, the tip 7 ₂ of the control pin 7 comes into contact with the inner surface of the portion of the tape 2 extending in the tangential direction, and when the supply reel 3 and the interlocking plate 5 rotate further, the control pin 7 moves. The tip portion 7 ₂ of the control pin 7 is sandwiched between the tapes 2 by swinging counterclockwise around the shaft hole. Then, the tape 2 can be continuously wound around the supply reel 3 with the tip portion 7 ₂ of the control pin 7 sandwiched between the tapes 2. When the rewound tape 2 is made to travel in the direction from the supply reel 3 to the take-up reel 4 by reproduction or fast-forwarding, the control pin 7 comes to a position in the longitudinal direction of the set tape with the stop position first. Immediately before, the end of the control pin 7 comes out above the tape 2, and when it reaches the set position, the control pin 7 engages with the tangential portion of the tape 2 and acts on the tape 2 as described above. The tension applied to the tape 2 increases, and the running of the tape 2 is stopped again.

When changing the set feed stop position or canceling the set once, take out the tape cassette stopped at the feed stop position from the tape recorder and move the slider 14 ₁ by hand. Then, when the opening 14 is opened, the adjustment button 6 is returned to the first position by being positioned in or positioned in the opening 14.

[0017]

[Effect of the device]

 According to the present invention, a magnetic tape is wound and housed in a cassette case around a pair of rotatable reels, and the reel is provided with an interlocking plate having an adjusting button and a control pin for stopping the tape feeding, and the tape running stop. At the same time, an opening for inserting the adjustment button is provided in the case, and a slider is provided so as to be openable / closable in the opening, and a slippery sheet is provided on the inner surface of the case at the passage of the adjustment button. As a result, when the adjustment button is set, it does not get caught in the seat edge when passing through the opening, and there is no operation noise that rubs directly against the case, which allows smooth and quiet operation and simplifies handling operations. A more reliable magnetic tape cassette with less malfunction can be obtained.

[Submission date] February 1, 1993

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

[0005]

[Action]

The interlocking plate 5 in the recess 13 of the supply reel 3 is rotatably fitted so that it cannot be pulled out or disengaged in the axial direction by the locking portion 9, and the adjustment button 6 is When in the first position (reset) fitted in the opening 14 formed in 1, the interlocking plate 5 is separated from the supply reel 3 and is in a stationary state, and the end portion of the control pin 7 is separated. Are located radially outward of the magnetic tape 2 while the supply reel 3 is free to rotate. In this state, the magnetic tape 2 can freely reciprocate between the supply reel 3 and the take-up reel 4 over the entire length of the magnetic tape 2 from the start end to the end. Further, by closing the opening 14 in the slider 14 _1, pushing the control button and the second position was mole on the inner surface of the case (set), the supply reel 3 engaged with the projection 15 of the supply reel 3 And the interlocking plate 5 rotate as a unit, and the adjustment button 6 moves along the slippery sheet 16. Since the control pin 7 also rotates at the same time as the rotation of the interlocking plate 5, the end of the control pin 7 located away from the outermost peripheral portion of the tape 2 wound around the supply reel 3 also extends tangentially. Move towards the part. When the end of the control pin 7 engages with the tape portion extending in the tangential direction and the supply reel 3 and the interlocking plate 5 further rotate, the control pin 7 swings around the bearing and the interlocking plate moves. Move along with 5. Therefore, the portion of the tape 2 that extends in the tangential direction is pulled in the rotational direction of the supply reel 3 by the end of the control pin 7, so that the tension acting on the tape 2 increases and the tension detection mechanism of the tape recorder ( (Not shown) operates to stop the tape 2 from running, but the adjustment button 6 passes smoothly without being caught on the seat, and a quiet operation is guaranteed without generating a rubbing noise with the case during operation. However, the appearance of the case can be improved.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

An annular interlocking plate 5 is rotatably fitted in the recess 13 of the supply reel 3 by a locking portion 9. The interlock plate 5, the annular flange portion 5 ₂ which is projected outward in the upper edge of the cylindrical wall 5 ₁ made of a synthetic resin material, and an annular flange portion 5 ₃ which is protruded inward the lower edge those donut-shaped having, on an upper surface outer peripheral portion of the annular flange portion 5 ₂ is provided with a control pin 7, the flexible adjustment button 6 and the synthetic resin material on the outer periphery thereof diametrically opposite It is formed integrally with a plastic material or provided via a spring.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008] In this case, the Regulatory button 6 has a projection 6 ₂ sliding on the top surface, when it slipped push above cases the inner surface, the contact area to allow the less to enable smooth sliding In consideration of this, a cam portion for locking is formed on the bottom surface so that it can come into contact with the convex portion 15 of the concave portion 13. The adjustment button 6 is provided on the upper surface of the interlocking plate 5, but the adjustment button 6 is raised from the upper surface of the interlocking plate 5 and bent in the outer peripheral direction to project. Is preferably provided to the adjustment button 6. In addition, it is considered that the annular interlocking plate 5 is formed with an arcuate cut groove 8 along the outer periphery on the side where the adjustment button 6 is provided, if necessary, to make the flexibility even more effective. .

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

A slippery sheet 16 is provided on the inner surface of the case of the passage of the adjustment button 6 provided on the interlocking plate 5, and the sheet is to be caught at the end of the sheet when passing through the opening 14. There is no need to rub the case directly to ensure smooth operation. In this case, the slippery sheet 16 is a ring-shaped sheet made of high-density polyethylene, and is arranged concentrically with a notch corresponding to the opening 14 around the hub hole in the upper case. Also, as shown in FIG. 5, the slippery sheet 16 is fitted in a circular hole 18 formed in a liner 17 which is provided around the hub hole and is provided in the case. May be taken into consideration. Further, it is also effective to attach a similar slippery sheet 16 ₁ to the inner surface of the slider 14 ₁ provided in the opening 14.

[Procedure Amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

For example, when it is desired to repeat the reproduction only within a specific range of the entire length of the already recorded magnetic tape 2, the tape length adjusting device is operated at the last magnetic tape position to be reproduced. First, the tape cassette is loaded into the tape recorder and a reproducing operation is performed. When the end of the reproduction target range is reached, the tape running is stopped. Removed cassette tape from the tape precoder, by Rukoto closes the opening 14 in the slider 14 _1, a second position pushing the control button. Then, the tape cassette is reloaded into the tape recorder. Operate the tape recorder to play or fast-forward the tape cassette and run it in the same direction as it was before removal. Receiving a rotational force from Tepureko over da, the supply reel 3 starts to rotate in the counterclockwise direction, the projection 15 of the supply reel 3 adjacent to the regulating button 6 is immediately engaged with the cam portion 6 ₃ of control buttons 6 Together, the supply reel 3 and the interlocking plate 5 rotate integrally, and the adjusting button 6 can pass over the slippery sheet 16 without being caught by the sheet end and can act on the tape 2 by the control pin 7. The tension is increased and the tape running is stopped.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention with a part of an upper case removed.

FIG. 2 is an enlarged perspective view of the interlocking plate of the embodiment of FIG. 1 viewed from above.

3 is a plan view in which the upper case and the lower case of the embodiment of FIG. 1 are separated and developed, and A shows the inner surface of the upper case and B shows the inner surface of the lower case.

FIG. 4 is an enlarged vertical sectional view taken along line I-I of FIG. 3B.

FIG. 5 is a plan view showing a seat used in a case.

[Explanation of symbols]

1 Case 2 Magnetic tape 3 Supply reel 3 ₁ Cylindrical part 4 Take-up reel 5 Interlocking plate 5 ₁ Cylindrical wall 5 ₂ Annular flange part 5 ₃ Annular flange part 6 Adjustment button 6 ₁ Elastic support part 6 ₂ Projection part 6 ₃ Cam part 7 Control pin 7 ₁ Base end 7 ₂ Tip 9 Locking part 13 Recess 14 Opening 14 ₁ Slider 15 Convex 16 Slidable seat 17 Seat 18 Circular hole

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[Procedure amendment]

[Submission date] February 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

Claims (3)

[Scope of utility model registration request] 1. A magnetic tape 2 is accommodated in a cassette case 1 by being wound around a rotatable supply reel 3 and a take-up reel 4, and the supply reel 3 is provided with an adjusting button 6 for stopping tape feeding and a control pin. 7 is provided with an interlocking plate 5 having
The case 1 is provided with an opening 14 into which the adjustment button 6 is fitted when the tape running is stopped, and the slider 14 ₁ is inserted into the opening 14.
The control button 6 is provided so that it can be opened and closed.
2. A magnetic tape cassette, wherein a slippery sheet 16 is disposed on the inner surface of the case at the passage section of the magnetic tape. 2. The slippery sheet 16 is a ring-shaped sheet made of ultra-high density polyethylene, which is concentric with a notch corresponding to the opening 14 around the hub hole in the upper case. The magnetic tape cassette according to claim 1, which is provided. 3. The magnetic tape cassette according to claim ₁ , wherein the slider 14 has a slippery sheet 16 ₁ on the bottom surface thereof.