JPH0611182U - Magnetic tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] The control pin for stopping tape running, which is used in magnetic tape cassettes with adjustable recording / playback time, can be visually checked to prevent erroneous operation. [Configuration] By having the visible window 20 which can be visually recognized free end ₇₁ of the control pin 7 which tape travel stop position is set in the case, seen unlocked when the control pin end is visible Operation can be detected, erroneous operation can be properly prevented, safe handling can be performed, reliability can be greatly improved, product value can be improved, and the timing when the lock can be unlocked can be easily recognized by the user. It is easy to handle and can improve the strength and appearance of the case.

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. 6, the present invention has been previously proposed by the present applicant (actual application No. 2-72496) as a tape cassette itself capable of freely adjusting 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 supply button, and the adjustment button c is engaged with and disengaged from the connecting projection provided in the recess, and the supply reel b There is a tape cassette in which the and the interlocking plate e can be integrally rotated or can be relatively rotated, and the feeding of the tape is stopped at a predetermined position by the control pin d.

[0003]

[Problems to be solved by the device]

 However, if the control pin d is used to stop the feeding of the tape at an arbitrary position in the length direction of the tape a, when the tape is played back to the time adjustment position and the tape is fed by fast-forwarding, the control pin applies tension to the tape. Since the tape stops being fed and the tape feeding is stopped at the time adjustment position by the control pin, the adjustment button is operated ON-OFF to set and the stop position once set is set. The tape is stopped if the control pin is set at the time adjustment position and the lock is accidentally released while the control pin is wound on the tape, because it is handled by changing or releasing the setting. Occurs. In such a case, the user often mistakenly thinks that the tape cassette has been damaged, there is no mechanism for preventing erroneous operation, and it is particularly difficult to recognize the timing for releasing the lock, which is a handling problem. . The present invention is intended to eliminate these conventional drawbacks, and simplifies the operation of changing the tape feeding stop position and canceling the setting, and also enables the lock canceling operation only when the end of the control pin is visible. It is possible to properly prevent erroneous operation, handle safely, greatly improve reliability, enhance product value, and also make it easy for users to recognize the timing that can unlock the lock. It is an object of the present invention to provide a magnetic tape cassette which is simple and has a good strength and good appearance of the case, and which is durable and inexpensive.

[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. A magnetic tape cassette having an adjusting button 6 for engaging and disengaging the reel 3 and the interlocking plate 5, and a control pin 7 for stopping the tape delivery, provided on the interlocking plate 5 to stop the tape delivery by the control pin 7. The magnetic tape cassette is characterized in that the case is provided with a visible window portion 20 through which the free end 7 ₂ of the control pin 7 whose position when the tape running is stopped is set can be seen.

[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 has an opening 14 formed in the case 1. When it is in the first position (locked off), the interlocking plate 5 is separated from the supply reel 3 and is stationary, and the free end 7 ₂ of the control pin 7 is the magnetic tape 2. Is located radially outwardly of the pin guide member 17 and between the pin guide member 17 and the tangentially extending portion of the 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 from the start end to the end of the magnetic tape 2. Further, when the adjustment button 6 is pushed in by closing the opening 14 with the slide shutter 14 ₁ and brought to the second position (lock ON) in which the adjustment button 6 is slid over the inner surface of the upper case, the supply reel 3 engages with the convex portion 15 and is supplied. The reel 3 and the interlocking plate 5 rotate integrally, and at the same time as the interlocking plate 5 rotates, 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 5 the free end 7 ₂ of the control pin 7 which is pivotally supported is engaged with the pin guide member 17, and stops further hit the rotation restricting ribs 9, stopping the rotation of the supply reel 3, whereby Te Purekoda A tension detection mechanism (not shown) is activated to stop the tape 2 from running, and the tape can be stably switched without rubbing. Moreover, since the control pin end when the tape cassette is stopped at this lock ON time adjustment set position can be seen from the outside of the case through the visible window 20, the lock can only be unlocked when the control pin end is visible. Operable detection is possible and erroneous operation is properly prevented, safe handling is possible and reliability is 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 in the cassette case 1, respectively. And a magnetic tape 2. 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 take-up reel 4 each have one of both ends fixed to a predetermined length. 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 are formed. The cylindrical inner wall defining the recess 13 is provided with a plurality of locking projections 15 projecting radially inward at equal intervals.

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 a donut shape having an annular flange portion projecting outward at the upper edge of the cylindrical wall and an annular flange portion projecting inward at the lower edge. , control pin 7 on the upper surface outer peripheral portion of the annular flange portion is provided rotatably, adjustment button 6 via the bus Ne ₆₁ support the outer peripheral portion thereof diametrically opposite the metal spring such as It is made of flexible material.

The control pin 7 is provided with a mounting base 7 ₁ rotatably supported by a cylindrical rib protruding from an interlocking plate parallel to the rotation axis of the supply reel 3, and further downwardly in parallel with the shaft hole. It is composed of a free end portion 7 ₂ along the peripheral surface of the winding tape which extends. Then, the control pin 7 can pivot about the mounting base 7 ₁ and its free end 7 ₂ can contact the surface of the magnetic tape 2 or the pin guide member 17. The control pin 7 is preferably made of a non-magnetic metal material, the free end 7 ₂ at the tip has a circular cross section, and the mounting base 7 ₁ has a cylindrical rib projecting from the interlocking plate 5. A hole for engaging with is formed, and the cylindrical rib is attached by caulking and welding. The control pin 7 is rotatably fixed on the welded portion 8 of the mounting 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 by setting it so that the stop position of the adjustment button 6 can always be kept constant regardless of the size of the tape winding diameter, and the position when the tape running is stopped is set. those having the visible window 20 cases can be visually recognized free end 7 ₂ of the control pin 7 to be.

In this case, the visible window portion 20 is a transparent wall integrally formed with the case 1, and is provided at a position on the control rib 9 for stopping the control pin 7. As for the visible window 20, the case 1 is provided with an identification display 21 such as an arrow or a caution mark so that the position of the end of the control pin can be seen at the minimum size or the position can be clearly discriminated. It is taken into consideration that measures are taken to help prevent accidental operation by providing instructions or coloring control pins to draw attention.

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 free end portion 7 of the control pin 7 is provided. _It is a standing wall that supports ₂ , and it may be integrated with the tape guide pin 10 or may be a separate body, and is extended to a position near the guide roller 12 mounted on 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. Although are rounded to Earl, the are of the tape contact end than the control pin 7 free end 7 ₂ of the radius of the tip of to have a small diameter rounded, the control pin 7 is submerged in the inside of the pin guide members 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 it is made to prevent the pin guide member 17 from coming into 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 An undercut claw may be used, which is locked to an annular flange portion formed on the lower edge of the cylindrical wall of the interlocking plate 5, and the interlocking plate 5 is rotatably fitted in the recess 13 and is removed. It has a structure that prevents it from coming out.

The center plate of the interlocking plate 5 housed in the recess 13 of the supply reel 3 is loosely fitted into 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 adjustment button 6 is in the first position (lock OFF), 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 on the supply reel 3. Relative rotation about the rotation axis is possible with respect to the supply reel 3 without matching, and the control pin 7 is located 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 position and tension is not applied to the tape.

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 bottom surface engages with one of the protrusions 15 formed on the supply reel 3, and the relative rotation between the interlocking plate 5 and the supply reel 3 becomes impossible. It should be noted that when the adjustment button 6 is moved to the inner surface of the upper case, the opening 14 of the case ₁ is closed by the slide shutter 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 tension the tape. When the adjusting button 6 is in the first position inside the opening 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 of the tape recorder and the opening 14 is closed by the slide shutter 14 ₁ to push the adjustment button 6 to the second position. Then, this 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 before removal. The supply reel 3 starts to rotate counterclockwise in response to the rotational force from the tape recorder, but the convex portion 15 of the supply reel 3 adjacent to the adjusting button 6 immediately engages with the adjusting button 6 and becomes The interlocking plate 5 rotates as a unit, the control pin 7 is hooked on the pin guide member 17 and moves, and at the same time, it engages with the pin guide member 17 and hits the rotation restricting rib 9 to stop, thereby stopping the tape. The tension acting on 2 is increased and the tape running is stopped.

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 the set feed stop position is once changed or the setting is canceled, the tape cassette stopped at the feed stop position is taken out from the tape recorder and the control pin is displayed on the visible window 20. check that the end is visible, when moving the slide shutter motor 14 ₁ by hand opening the opening 14, since adjustment button is in the position of always opening 14 regardless of the tape winding diameter, control button 6 is opened 14 Enter and return to the 1st position (lock OFF).

[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. And a control pin for stopping the tape feeding in the interlocking plate, and in the magnetic tape cassette configured to stop the tape feeding by the control pin, the free end of the control pin whose position when the tape running is stopped is set. Since the case has a visible window that allows the user to see the part, when the tape running stops at the time-adjusted set position, the unlock operation can be performed only when the control pin end is visible from the visible window. Can be handled properly, safe handling is possible, reliability is greatly improved, product value is also improved, and the user can easily recognize the timing when the lock can be released. And improving the scan of strength and attractiveness, there are also practical effects such as useful in embedded easy to work improvement of adjustable automatic assembly line magnetic tape cassette mass production of the recording and playback time.

[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 an enlarged vertical sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view of the interlocking plate of the embodiment as seen from above.

5 is an enlarged cross-sectional view of a portion of FIG.

FIG. 6 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 Cylindrical Part 4 Take-up Reel 5 Interlocking Plate 6 Adjustment Button 7 Control Pin 7 ₁ Mounting Base 7 ₂ Free End 8 Welding Part 9 Rotation Restriction Rib 10 Tape Guide Pin 11 Locking Part 12 Guide roll 13 Recess 14 Opening 14 ₁ Sliding shutter 15 Convex part 17 Control pin guide member 17 ₁ Spindle 20 Visible window part 21 Identification display

Claims (3)

[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. And a control pin 7 for stopping tape feeding, which is provided in the interlocking plate 5, and in the magnetic tape cassette configured to stop the tape feeding by the control pin 7, the control pin for setting the position when the tape running is stopped. A magnetic tape cassette, characterized in that the case is provided with a visible window portion 20 through which the free end portion 7 ₂ of 7 can be seen. 2. The visible window portion 20 is a transparent wall for the case 1
2. The control pin 7 is integrally molded with the control pin 7 and is provided at a position on the restriction rib 9 for stopping the control pin 7.
The magnetic tape cassette described. 3. The magnetic tape cassette according to claim 1, wherein the visible window portion 20 is provided on the case together with an identification display 21 of an arrow or a caution mark formed on the case 1.