JPH06195932A - Magnetic tape cassette - Google Patents

Abstract

PURPOSE:To simplify the assembling constitution by smoothing movement of a control pin for tape running stop, which is used for a magnetic tape cassette capable of adjusting recording and reproducing time, so as to stably control running. CONSTITUTION:When a control pin 7 for tape feed stop is provided on an interlocking plate 5 with respect to a reel in a cassette case, a lock spring 61 provided with a control button 6 for engagement/disengagement between the supply reel and the interlocking plate and the control pin 7 are interposed and held between a welding connector 27 and the interlocking plate 5 and are coupled between them at welding parts 18 and 19. Thus, the control pin which stops feed of the tape is easily and surely provided, and the control in the height direction is easy and the control pin is smoothly moved, and the safe operation is possible, and the durability is considerably improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cassette having 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]

2. Description of the Related Art Conventionally, as shown in FIG. 10, a tape cassette has been previously proposed by the present applicant (Practical Application No. 2-72496) as a tape cassette which can freely adjust the recording / reproducing time. Adjustment button c in the recess of supply reel b
Also, the interlocking plate e having the tape control pin d is rotatably fitted, the opening is closed by the shutter f, and the adjustment button c is moved to the inner surface of the case to connect the adjustment button c in the recess. There is a tape cassette in which the supply reel b and the interlocking plate e can be integrally rotated or relatively rotated by being engaged with and disengaged from the convex portion, and the feeding of the tape is stopped at a predetermined position by the control pin d.

[0003]

However, in order to stop the feeding of the tape at an arbitrary position in the lengthwise direction of the tape a, the opening f of the case is closed by the slider to push the adjustment button c upward. When the lock position is submerged in the inner surface of the case, the supply reel b and the interlocking plate e rotate integrally, and at the same time, the control pin d also moves, reproduces to the time adjustment position, and fast-forwards the tape, The control pin is supposed to put tension on the tape to stop the running,
There was a method of welding the control pin d to the interlocking plate e, but with this means, it was necessary to caulk and weld with a gap so that the control pin d could rotate smoothly. The problem is that it is very difficult to control and install. The present invention is intended to eliminate these drawbacks properly, and it is possible to simply arrange a control pin or an adjusting button for stopping the tape feeding for a magnetic tape cassette capable of adjusting the recording / playback time. It is an object of the present invention to provide a magnetic tape cassette in which the control pin moves smoothly, does not require a positioning operation, is easily and firmly incorporated into the case, and has a durable and inexpensive form. .

[0004]

According to 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 for the supply reel 3. A lock spring 6 provided with a rotatable button 5 and an adjustment button 6 for engaging and disengaging the supply reel 3 and the interlocking plate 5.
₁ and a control pin 7 for stopping tape feeding are provided in the interlocking plate 5, and the lock spring 6 is provided in the magnetic tape cassette configured to stop the tape feeding by the control pin 7.
₁ and the control pin 7 are connected to the interlocking plate 5 by the welding connector 27.
It is a magnetic tape cassette characterized in that it is held between the two and is welded and joined by the welding portions 18 and 19.

[0005]

The interlocking plate 5 in the recess 13 of the supply reel 3 is rotatably fitted by the locking portion 11 so as not to be pulled out in the axial direction, and the adjustment button 6 is attached to the case 1. The first position (the lock OF which is fitted into the formed opening 14)
In F), the interlocking plate 5 is separated from the supply reel 3 and is stationary, and the free end portion 7 of the control pin 7 is
_The magnetic tape ₂ is located radially outward of the magnetic tape _{2 and} is located between the pin guide member 17 and a portion of the tape 2 extending in the tangential direction.
Can rotate freely. 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, when the adjustment button 6 is pushed in by closing the opening 14 with the slide shutter 14 ₁ and is brought to the second position (lock ON) in which the adjustment button 6 is pushed over the inner surface of the upper case, the supply reel 3
The supply reel 3 and the interlocking plate 5 rotate integrally with each other by engaging with the convex portion 15 of the control pin 7 and at the same time as the interlocking plate 5 rotates.
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, it will be supported by the interlocking plate 5. The free end 7 ₂ of the control pin 7 pivotally supported by the shaft 8 engages with the pin guide member 17, and the control pin 7 further moves around the support shaft 8 to rotate the free end 7 _2. It stops by hitting the regulation rib 9 and stops the rotation of the supply reel 3, whereby the tension detecting mechanism (not shown) of the tape recorder is activated to stop the tape 2 from running, and the tape is not rubbed and stable switching is performed. it can.

[0006]

1 to 9, a 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. It is composed of a magnetic tape 2 mounted. 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 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. 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 provided in the recess 13 of the supply reel 3 so as to engage with a ring or claw engaging portion 11.
It is fitted with. The interlocking plate 5 is of a donut shape and is made of a synthetic resin material and has an annular flange portion 5 ₁ projecting outward from the cylindrical wall and an annular flange portion 5 ₂ projecting inward at the lower edge. _On the upper surface of the annular flange portion 51, a pair of welding projections 18, 18 and welding projections 19, 19 and a support shaft 8 are projected, and a lock spring 6 provided with an adjusting button 6 is provided.
₁ and a control pin 7 rotatably provided by a support shaft 8. The lock spring 6 is provided on the outer peripheral portion on the diametrically opposite side.
_The adjustment button 6 is provided through ₁ via a flexible material such as a metal spring.

The adjusting button 6 is formed integrally with the lock spring 6 ₁ and is provided with a squeezed portion 6 _2, and the welding projections 18, 18 of the interlocking plate 5 are fitted into the fitting holes 23, 23 at both ends of the lock spring 6 ₁ . It is fitted in 18. Also, the adjustment button 6 is bent in the central portion of the lock spring 6 _{1 having} a semi-circular shape,
It is composed of a bent portion that is raised and a locking piece portion 16 that extends downward from the bent portion so that it can be locked to the convex portion 15 of the reel, and the squeezed portions 6 are formed on both sides of the bent portion. Formed ₂ .

The lock spring 6 ₁ and the control pin 7 are held by the welding connector 27 on the interlocking plate 5, and the welding projection 1
8 and 19 are joined together by clasping, but this welding connector 2
Reference numeral 7 is a semi-circular plate that is placed on the interlocking plate 5 and has a recess 2 provided with a rotation clearance for the control pin 7.
0 and the fitting holes 21 and 22 of the welding convex portions 18 and 19, and it is preferable to mount and fit on the annular flange portion 5 ₁ of the interlocking plate 5. In this case, the welding projection 1 is formed on the outer periphery of the interlocking plate 5.
Providing an undercut temporary fixing projection 5 ₃ near 8
To ensure that the cantilever lock spring 6 ₁ can be installed in a stable manner, for example, the lock spring does not slide down during welding on the assembly line, and the floating spring is prevented from being welded. .

The control pin 7 has a mounting base 7 ₁ rotatably supported by a support shaft 8 of an annular flange 5 ₁ projecting from an interlocking plate 5 parallel to the rotation axis of the supply reel 3.
Further, it is composed of a free end portion 7 ₂ along the peripheral surface of the winding tape extending downward in parallel with the shaft hole. 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 portion 7 ₂ at the tip has a circular cross section, and the mounting base portion 7 ₁ is provided with a projection on the annular flange portion 5 ₁ of the interlocking plate 5. A hole that engages with the support shaft 8 is provided, and the support shaft 8 is attached by penetrating the support shaft 8 into the recess 20. The control pin 7 is configured to stop the tape feeding through a pin guide member 17 rotatably provided on the case 1, and a rotation restricting 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 adjustment button 6 can always be kept constant regardless of the tape winding diameter.

In this case, as the rotation control rib 9,
A standing wall that 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 supports the free end portion 7 ₂ of the control pin 7,
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, in a state where the magnetic tape 2 is under tension, the tip is always in contact with both the magnetic tape side and the magnetic tape back side of the magnetic tape 2.
A pin guide member 17 having a tape contact end is rotatably provided on a case by a support shaft 17 _1. The control pin guide member 17 is a lever whose tip is curved in an arc shape. the tape contact end parts are rounded to radius, but the radius of the tape contact end to have a diameter of rounded than the free end 7 ₂ of the radius of the tip of the control pin 7, the control pin 7 of the pin guide members 17 It is preferable that the pin guide member 17 is a strip-shaped piece having a tape width and is subjected to an antistatic treatment in order to prevent the pin guide member 17 from coming into contact with the magnetic tape 2. Is preferably used. It is also a preferable mode to consider 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 pulled out. As a preventive 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 is inserted into the cylindrical portion 3 ₁ . It is positioned in the vertical direction by the protruding locking portion 11 so that it can rotate stably. When the adjustment button 6 is in the first position (lock OFF), that is, when the adjustment button 6 is fitted in the opening 14 formed in the case 1, the interlocking plate 5 has the convex portion 15 formed on the supply reel 3.
It is possible to rotate the supply reel 3 relative to the supply reel 3 without engaging with the control pin 7, 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. It is located there and is in a free state where no tension is applied to the tape.

Further, when the adjusting button 6 is pushed downward to the second position (lock ON), that is, when the adjusting button 6 has sunk into the inner surface of the case 1, the adjustment button 6 provided on the interlocking plate 5 is engaged. The stop 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. Incidentally, when the allowed moles adjustment button 6 on the inner surface of the case, the opening 14 of the case 1, to have so there is no obstacle to the rotation operation of the interlock plate 5 is closed by the slide shutter 14 _1, the control pin 7 The supply reel 3 is hooked on the pin guide member 17 and displaced immediately before and after the supply reel 3 is stopped to be locked by the pin guide member 17 to apply tension to 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 freely reciprocate 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 which 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 to perform a reproducing operation, and the tape running is stopped when the end of the reproduction target range is reached. The cassette tape is taken out from the tape recorder and the shutter 14 ₁ closes the opening 14 to push the adjustment button 6 to the second position. Then, this 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 in response to the rotational force from the tape recorder, but the convex portion 15 of the supply reel 3 adjacent to the adjustment button 6 immediately engages the adjustment button 6 via the locking piece portion 16. Together, the supply reel 3 and the interlocking plate 5 rotate integrally, and the control pin 7 is hooked on the pin guide member 17 to move,
At the same time, the rotation restricting rib 9 is engaged with the pin guide member 17.
When the tape 2 stops, the tape running is stopped by increasing the tension acting on the tape 2.

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 7 ₂ of the control pin 7 is guided by the pin guide member 17, in contact with the inner surface of the portion extending in the tangential direction of the tape 2, further it has interlock plate 5 and the supply reel 3 rotates, the control pin 7 It is possible to continue winding the tape 2 around the supply reel 3 with the free end portion 7 ₂ sandwiched between the tapes by rotating counterclockwise around the mounting base portion 7 ₁ . Further, when the rewound tape 2 is run in the direction from the supply reel 3 to the take-up reel 4 by reproduction or fast-forwarding, immediately before reaching the position in the length direction of the tape which is set with the control pin 7 as the stop position. the free end 7 ₂ of the control pin 7 is guided to the pin guide member 17, the pin guide member 17, to a portion extending in the tangential direction of the tape 2, come out to a position between the set the free end 7 ₂ of the control pin 7 at the time point when the position is engaged with the pin guide member 17, stops against the rotation restricting ribs 9, thereby, the tension acting on the tape 2 is increased, The running of the tape 2 will be stopped again.

When changing the set feed stop position or canceling the set once, the tape cassette stopped at the feed stop position is taken out from the tape recorder and the slide shutter 14 ₁ is moved by hand. When the opening 14 is opened with the adjustment button 6, the adjustment button is always located at the position of the opening 14 regardless of the tape winding diameter.
Enter to return to the first position (lock OFF).

[0019]

According to the present invention, the magnetic tape is wound and housed on a pair of rotatable reels in the cassette case, the interlocking plate is rotatably provided on the reel, and the supply reel and the interlocking plate are engaged. The adjustment button to be released, the lock spring and the control pin are held by the welding connector on the interlocking plate, and the welding is performed by the welding portion, so that the control pin that stops the tape feeding is simply and securely arranged in the height direction. Regulations are easy, the movement of the control pin is smooth, it can be operated safely and the durability is greatly enhanced, and the magnetic tape cassette with adjustable recording / playback time can be incorporated in the automatic assembly line for mass production. There are also practical effects such as making it easier and improving workability.

[Brief description of drawings]

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

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

FIG. 6 is a perspective view showing a separated state of the interlocking plate of the example of FIG.

FIG. 7 is an enlarged vertical sectional view taken along the line BB of FIG.

FIG. 8 is an enlarged vertical sectional view taken along the line CC of FIG.

9 is an enlarged plan view of a part of FIG. 1. FIG.

FIG. 10 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 5 ₃ Projection 6 Adjustment Button 6 ₁ Lock Spring 6 ₂ Squeeze Processing 6 ₃ Extension 7 Control pin 7 ₁ Mounting base 7 ₂ Free end 8 Spindle 9 Rotation restriction rib 10 Tape guide pin 11 Locking part 12 Guide roll 13 Recess 14 Opening 14 ₁ Slide shutter 15 Convex part 16 Locking piece 17 Control Pin guide member 17 ₁ Support shaft

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[Procedure amendment]

[Submission date] July 7, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

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[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008] This adjustment button 6 is formed integrally with the lock spring _61, Hojiri processing section _{6 2} comprises a lock spring of the interlock plate 5 in the fitting hole 23, 23 in ₆₁ of both end welding protrusions 18, It is fitted in 18. Moreover, the adjustment button 6 is bent in a central portion of the lock spring ₆₁ of the semicircular,
It consists of a raised bent portion and a locking piece portion 16 extending radially outward from the bent portion so that it can be locked to the convex portion 15 of the reel, and the both sides of the bent portion are pressed. part ₆ is formed with _2.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

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[Figure 3]

[Procedure amendment 4]

[Document name to be corrected] Drawing

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[Correction method] Change

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[Figure 4]

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[Document name to be corrected] Drawing

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[Figure 5]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Correction target item name] Figure 9

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[Figure 9]

Claims (3)

[Claims] 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. Is provided with a lock spring 6 ₁ provided with a control pin 7 and a control pin 7 for stopping tape feeding,
In the magnetic tape cassette configured to stop the tape feeding, the lock spring 6 ₁ and the control pin 7 are held by the welding connector 27 on the interlocking plate 5, and the welding portions 18, 19
A magnetic tape cassette characterized by being bonded together by. 2. The welding connector 17 is mounted on the interlocking plate 5 as a semi-circular plate, and the recess 20 is provided with a rotation clearance of the control pin 7, and the welding portion 18,
The magnetic tape cassette according to claim 1, comprising 19 fitting holes (21, 22). 3. The fitting hole 2 into which the lock spring 6 ₁ is fitted and inserted into a pair of welding projections 18, 18 protruding from the interlocking plate 5.
3. A leaf spring having 3, 23 at both ends thereof, which is integrally provided with an adjusting button 6 in the central portion and which is locked to a temporary fixing projection piece 5 ₃ provided on a ring-shaped interlocking plate 5. The magnetic tape cassette described in 2.