JPH0684580U - Magnetic tape cassette - Google Patents

Abstract

(57) [Summary] [Purpose] To significantly reduce the running noise when setting and resetting the operating adjustment buttons used for magnetic tape cassettes that can adjust the recording / playback time, and improve running performance. A slider 14 is provided which is provided with an adjusting button 6 for engaging and disengaging a reel in a cassette case and an interlocking plate 5 having a control pin 7 for stopping tape feeding, and for turning the adjusting button 6 on and off. _In the magnetic tape cassette in which 1 is slidably provided in the hole 14 of the case 1, the sliding sheet 23 interposed between the case 1 and the magnetic tape 2 wound on both reels 3 and 4 By providing the substantially U-shaped notch 24 into which the adjustment button 6 is inserted at a position corresponding to the adjustment button 6 in the hole portion 14,
Even if the sliding sheet is interposed when the lock / on of the adjustment button is set / reset, the generation of running noise is reduced, the tape running performance can be greatly improved, and the recording and playback time can be adjusted with high durability. 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 control pin capable of adjusting a 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, as shown in FIG. 7, the applicant previously proposed (Japanese Patent Application No. 2-72496) that the tape cassette itself can freely adjust the recording / reproducing time. An interlocking plate e having an adjustment button c and a tape control pin d is rotatably fitted in the recess of the, and the opening is closed with a slider f, and the adjustment button c is moved into the inner surface of the case, Is engaged with and disengaged from the connecting convex portion provided in the recess so that the supply reel b and the interlocking plate e can be integrally rotated or relatively rotated, and the feeding of the tape is stopped at a predetermined position by the control pin d. There is a tape cassette.

[0003]

[Problems to be solved by the device]

 However, in order to stop the feeding of the tape at an arbitrary position in the length direction of the tape a, by closing the opening of the case with the slider f (lock ON), the adjustment button c was pushed and made to dive into the inner surface of the upper case. When in the lock position, the supply reel b and the interlocking plate e rotate together, and at the same time, the control pin d also moves, regenerates to the time adjustment position, and when the tape is fed by fast forward, the control pin becomes the tape. Tension will be applied to stop running. At this time, the adjusting button rotates together with the interlocking plate under the urging force that constantly tries to contact the inner surface of the upper case. Here, a seat was required to prevent direct rubbing against the inner surface of the half, and it was also necessary to provide a hole in the seat for the adjustment button to fit in the case hole when the lock was turned off. However, if there is a hole in the seat even in a part of the adjustment button passage, there was a problem that the frictional force and the number of people traveling in rotation would increase when passing through it. The present invention is intended to eliminate these drawbacks properly, so that a magnetic tape cassette capable of adjusting the recording / playback time is provided. -It is an object of the present invention to provide a magnetic tape cassette in a cheap and durable form that can greatly improve the tape running property by reducing the generation of running noise when it is turned off.

[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 an interlocking plate 5 is rotatably provided on the supply reel 3 and supplied. and Rokkuba Ne 6 ₁ the control button 6 is provided for disengaging the interlock plate 5 and the reel 3, with includes the interlock plate 5 and the control pin 7 for stopping the tape-feeding, the set-reset of the regulatory button 6 In a magnetic tape cassette in which a slider 14 ₁ for turning on and off is slidably provided in the hole 14 of the case 1, it is interposed between the case 1 and the magnetic tape 2 wound on both reels 3, 4. The sliding sheet 23 is provided with a substantially U-shaped notch 24 into which the adjustment button 6 is inserted at a position corresponding to the adjustment button 6 in the hole 14.

[0005]

[Action]

The interlocking plate 5 in the recess 13 of the supply reel 3 is rotatably fitted in the locking portion 11 so as not to be pulled out in the axial direction, and the adjustment button 6 is a hole formed in the case 1. When in the first position (locked off) fitted in the portion 14, the tongue 25 formed by the notch 24 of the sliding sheet 23 is lifted and the interlocking plate 5 is separated from the supply reel 3. In the stationary state, the free end 7 ₂ of the control pin 7 is located radially outward of the magnetic tape 2 and at the pin guide member 17 and the portion extending in the tangential direction of the tape 2. Located in the sandwich, the supply reel 3 is free to rotate. In this state, the magnetic tape 2 can freely travel back and forth between the supply reel 3 and the winding reel 4 over the entire length of the magnetic tape 2 from the start end to the end. Further, when the adjustment button 6 is pushed by closing the hole 14 with the slider 14 ₁ and brought to the second position (lock ON) in which the adjustment button 6 is slid into the inner surface of the upper case, the tongue-shaped piece formed by the notch 24 of the sliding sheet 23 is formed. 25 is pushed down to become a flat sheet, smoothing the passage of the adjustment button 6, engaging the convex portion 15 of the supply reel 3 and rotating the supply reel 3 and the interlocking plate 5 integrally. At the same time as the rotation of 5, the control pin 7 also rotates. Originally, the control pin 7 was located between the pin guide member and the portion extending in the tangential direction of the tape 2 when the lock was turned off. Therefore, if the interlocking plate 5 rotates as it is, the interlocking plate will move. The free end portion 7 ₂ of the control pin 7 pivotally supported by 5 engages with the pin guide member 17 and further stops by hitting the rotation regulating rib 9 to stop the rotation of the supply reel 3 and thereby the tape. The tension detection mechanism (not shown) of the recorder is activated to stop the running of the tape 2, and the tape can be stably switched without rubbing.

[0006]

【Example】

 1 to 6, 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 of both ends fixed respectively. The magnetic tape 2 is wound. The supply reel 3 is integrally formed with a projection extending radially inward at the center of the supply reel 3 to receive rotation from the tape recorder, and a recess is formed inside the winding drum portion of the reel 3. 13 is formed, and a plurality of locking projections 15 projecting inward in the radial direction are provided at equal intervals on a cylindrical inner wall that defines the recess 13.

An annular interlocking plate 5 is rotatably fitted in the recess 13 of the supply reel 3 by a locking portion 11 of a ring or a claw. The interlocking plate 5 is made of a synthetic resin material, and has an annular flange portion 5 ₁ projecting outward at the upper edge of the cylindrical wall and an annular flange portion 5 ₂ projecting inward at the lower edge of the cylindrical wall. intended, lock spring ₆₁ for the upper surface outer peripheral portion of the annular flange portion 5 _first control pin 7 is provided with rotatably in the weld portion 8, supported on the outer peripheral portion of the diameter direction opposition side with adjustment button 6 via is provided in a flexible material such as a metal spring, sliding the slider 14 ₁ for O N-OFF of the set-reset of the control button 6 into the hole portion 14 of the case 1 Although it is provided as a magnetic tape cassette freely, a sliding sheet 23 interposed between the case 1 and the magnetic tape 2 wound around the reels 3 and 4 is used to adjust the adjustment button inside the hole 14. The insertion of the adjustment button 6 at a position corresponding to the button 6. The U-shaped notch is provided with a U-shaped notch 24. As the notch 24 of the sheet 23, a U-shaped notch having a width smaller than the width of the hole 14 in the slider sliding direction is formed as a tongue-shaped piece 25 which can be undulated.

[0008] The adjusting button 6 be formed in the lock spring ₆₁ integrally, squeezing includes a processing unit 6 _2, fitted to the welding pins 5 ₃ interlocking plate 5 in the mounting holes 6 ₃ at each end of the lock spring ₆₁ I'm wearing it. Further, the adjusting button 6 is composed of a bent portion that is bent and raised in the central portion of the lock spring 6 _{1 having} a semi-arcuate shape, and a locking piece portion 16 so that it can be locked to the convex portion 15 of the reel. The squeezed portions 6 ₂ are formed on both sides of the bent portion.

The control pin 7 includes a mounting base portion 7 ₁ rotatably supported by an annular flange portion 5 ₁ projecting from an interlocking plate 5 parallel to the rotation axis of the supply reel 3, and a shaft hole. And the free end portion 7 ₂ along the peripheral surface of the winding tape extending downward in parallel with the above. The control pin 7 can be swung around the mounting base 7 ₁ so that its free end 7 ₂ can contact the surface of the magnetic tape 2 or the pin guide member 17. The control pin 7 may to consist of a non-magnetic metallic material, the free end 7 ₂ of the tip a circular cross section, collision set in the annular flange portion 5 ₁ of the interlock plate 5 to the mounting base 7 ₁ A hole that engages with the welded portion 8 formed is provided, and is attached by caulking and welding the welded portion 8. The control pin 7 is rotatably fixed to the welded portion 8 of the attachment base 7 ₁ . With this control pin 7, the tape feeding is stopped via a pin guide member 17 rotatably provided on the case 1, and a rotation control rib 9 for stopping the rotation of the control pin 7 is provided on the inner surface of the case. The control pin 7 is forcibly stopped, so that the stop position of the adjusting button 6 can always be kept constant regardless of the tape winding diameter.

In this case, the rotation control rib 9 is provided between the tape guide pin 10 protruding from the case 1 and the support shaft 17 ₁ of the pin guide member 17, and the control pin 7 can be freely rotated. it becomes a standing wall for supporting the end portion 7 ₂ may be in a different individual, even together with the tape guide pins 10 are extended to close the position of the guide roller 12 to be mounted to the case.

Further, when tension is applied to the magnetic tape 2, a pin having a tape contact end is provided so that the magnetic tape 2 always has its tip in contact with both the tape magnetic surface side and the tape back surface side of the magnetic tape 2. A guide member 17 is rotatably provided on the case by a support shaft 17 _1. The control pin guide member 17 is a lever having a bent end in an arc shape. It is rounded into a rounded shape, but the radius of the tape contact end is made smaller than the radius of the free end portion 7 ₂ at the tip of the control pin 7 so that the control pin 7 goes into the inside of the pin guide member 17. It is preferable that the pin guide member 17 is a strip-shaped strip having a tape width and is subjected to an antistatic treatment because the pin guide member 17 is in contact with the magnetic tape 2. Is good Arbitrariness. It is also a preferable mode to consider the fact that the pin guide member 17 is biased in the axial direction of the reel hub by a spring (not shown).

As the locking portion of the interlocking plate 5, the locking portion 11 is fitted and used, but a ring protruding from the outer circumference of the drum inner cylindrical portion 3 ₁ of the supply reel 3 or undercover Tsu DOO nail may be used, as it is locked to the annular flange portion 5 ₂ is formed in a cylindrical wall lower edge of the interlock plate 5, rotatably fitted interlock plate 5 is in the recess 13 It has a pull-out prevention structure.

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, and the cylindrical portion 3 _It is positioned in the up-and-down direction by the locking portion 11 projecting from _{1 so} that it can rotate stably. When the adjusting button 6 is in the first position (lock OFF), that is, when the adjusting button 6 is fitted in the hole 14 formed in the case 1, the interlocking plate 5 and the protruding portion 15 formed on the supply reel 3 are provided. Relative rotation about the rotation axis is possible with respect to the supply reel 3 without engaging, and the control pin 7 is sandwiched between the control pin guide member 17 and the portion extending in the tangential direction of the tape 2. The tape is in the free state and the tape is not tensioned.

Further, when the adjustment button 6 is pushed downward to the second position (lock ON), that is, when the adjustment button 6 also digs into the inner surface of the case 1, the adjustment button 6 provided on the interlocking plate 5 is moved. The locking piece portion 16 engages with one of the convex portions 15 formed on the supply reel 3, and the relative rotation between the interlocking plate 5 and the supply reel 3 becomes impossible. When the adjusting button 6 is moved to the inner surface of the upper case, the hole 14 of the case ₁ is closed by the slider 14 _{1 so} that the rotating operation of the interlocking plate 5 is not hindered. Is hooked on the pin guide member 17 and displaced immediately before and immediately after the supply reel 3 is stopped, and is locked by the pin guide member 17 to apply tension to the tape. When the adjusting button 6 is in the first position in the hole 14 formed in the case 1, the magnetic tape can be freely reciprocated between the supply reel 3 and the take-up reel 4.

For example, when it is desired to repeat the reproduction within a specific range of the entire length of the magnetic tape 2 that has already been recorded, 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 the reproduction 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, and the hole 14 is closed by the slider 14 ₁ , so that the adjustment button 6 is pushed in to the second position. 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. The supply reel 3 starts to rotate counterclockwise under the rotational force from the tape recorder, but the convex portion 15 of the supply reel 3 adjacent to the adjustment button 6 immediately moves to the adjustment button 6 via the locking piece 16. When engaged, the supply reel 3 and the interlocking plate 5 rotate as a unit, the control pin 7 is hooked on the pin guide member 17 and moves, and at the same time engaged with the pin guide member 17 to rotate. It stops by hitting the regulating rib 9, thereby increasing the tension acting on the tape 2 and stopping the tape running.

When the tape 2 is rewound from the take-up reel 4 toward the supply reel 3 in this state, the adjustment button 6 is in the second position where it is pushed in, so that the supply reel 3 and the interlocking plate 5 are integrated. And rotate clockwise. The free end portion 7 ₂ of the control pin 7 is guided by the pin guide member 17 and 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, the control pin 7 With the mounting base portion 7 ₁ as a center, the tape 2 can be continuously wound around the supply reel 3 while rotating in a counterclockwise direction and sandwiching the free end portion 7 ₂ with the tape. 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 is set at the stop position in the longitudinal direction of the set tape. Immediately before, the free end 7 ₂ of the control pin 7 is guided to the pin pattern guide member 17, the pin guide member 17, to the extension building parts in the tangential direction of the tape 2, coming out sandwiched by positions When the set position is reached, the free end 7 ₂ of the control pin 7 engages with the pin guide member 17 and stops against the rotation restricting rib 9, so that the tension acting on the tape 2 is reduced. As a result, the tape 2 will stop running 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 hole 14 is opened, the adjustment button is always at the position of the hole 14 regardless of the tape winding diameter, so the adjustment button 6 enters the hole 14 and returns to the first position (lock OFF). . In this case, when the adjusting button 6 with the lock OFF [Fig. 4 (a)] is fitted in the hole 14, the tongue piece 25 of the slide sheet 23 is lifted by the notch 24 so that the slide sheet 23 can be operated without trouble, and the lock ON [Fig. 4 (b)], since the tongue 25 does not apparently have a hole in the seat 23 along the sliding seat 23, there is almost no running sound when the adjustment button 6 is running, and smooth running is enabled. . A pair of hub holes 26 are provided in the sliding sheet 23, and positioning recesses 27 are formed at both edges.

[0018]

[Effect of device]

 According to the present invention, a magnetic tape is wound around a pair of rotatable reels and housed in a cassette case, an interlocking plate is rotatably provided on the reel, and an adjusting button for engaging and disengaging the supply reel and the interlocking plate. A lock spring provided with a lock pin and a control pin for stopping tape feeding are provided on the interlocking plate, and a slider for ON / OFF of the setting / resetting of the adjusting button is slidably provided in the hole of the case 1. In the tape cassette, a sliding sheet interposed between the case and the magnetic tape 2 wound on both reels is used to insert the adjustment button into a position corresponding to the adjustment button in the hole. By providing a notch in the shape of a letter, the running noise of the running sound can be reduced even when the sliding sheet is interposed when the lock button for setting / resetting the adjusting button that stops the tape running is turned on / off in the case. Raw and to reduce, even can be improved by a large margin the tape running property, durability have high, it is possible to record playback time adjustable magnetic tape cassette.

[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 a plan view of the embodiment of FIG. 1 excluding an upper case, showing a winding start state of a take-up reel.

FIG. 3 is a plan view of the example sheet of FIG.

4 is an enlarged vertical sectional view taken along line AA of FIG.
(A) shows the lock OFF state, (b) shows the lock ON
Indicates the status.

5 is a perspective view showing a separated state of the supply reel in the example of FIG. 1. FIG.

FIG. 6 is an enlarged plan view of a part of FIG.

FIG. 7 is a plan view excluding an upper case of a conventional example.

[Explanation of symbols]

1 Case 2 Magnetic Tape 3 Supply Reel 3 ₁ Inner Cylinder 4 Winder Reel 5 Interlocking Plate 5 ₁ Annular Flange 5 ₂ Annular Flange 6 Adjustment Button 6 ₁ Lock Spring 6 ₂ Squeezing Process 7 Control Pin 7 ₁ Mounting Base 7 ₂ Free end 8 Welded part 9 Rotation restriction rib 10 Tape guide pin 11 Locking part 12 Guide roll 13 Recess 14 Hole 14 ₁ Slider 15 Convex part 16 Locking piece 17 Control pin guide member 17 ₁ Spindle 23 Slip Seat 24 Notch 25 Tongue

Claims (2)

[Scope of utility model registration request] 1. A magnetic tape 2 in a cassette case 1,
An adjusting button 6 which is wound around a rotatable supply reel 3 and a take-up reel 4 and accommodated therein, rotatably provided with an interlocking plate 5 on the supply reel 3, and which disengages the supply reel 3 and the interlocking plate 5. The lock spring 6 ₁ provided with the above and the control pin 7 for stopping the tape feeding are provided on the interlocking plate 5, and the slider 14 ₁ for turning ON / OFF the setting / resetting of the adjusting button 6 is provided in the hole 14 of the case 1. In the slidably provided magnetic tape cassette, the case 1 and both reels 3, 4
The sliding sheet 23 interposed between the magnetic tape 2 and the magnetic tape 2 is wound into the hole 14, and the adjustment button 6 is inserted at a position corresponding to the adjustment button 6 in the substantially U-shaped cutout 2.
4. A magnetic tape cassette characterized by having 4. 2. The cutout 24 of the sheet 23 is formed in the hole portion 14.
2. The magnetic tape cassette according to claim 1, wherein the tongue-shaped piece 25 is formed by a U-shaped notch having a width smaller than the width of the slider sliding direction.