JPH0765531A - Magnetic tape cassette - Google Patents

Abstract

PURPOSE:To safely control running without causing a tape damage and improve cost-performance and assembling easiness by a control pin used in a magnetic tape cassette capable of adjusting the recording/reproducing time. CONSTITUTION:An interlocking plate 5 with a control pin 7 to send/stop a tape is provided in a reel within a cassette case. A tape guiding member 17 is pivotally supported with a rotary shaft 17 on the case so that a front end of the member 17 is always in touch with a magnetic face and a back face of a magnetic tape 2. When the tape stops running at a set position adjusted in time, the control pin is prevented from colliding against the magnetic face of the tape. Accordingly, the tape cassette can be manipulated safely without causing a tape damage and is enhanced in reliability. Moreover, the magnetic tape cassette is inexpensive and easy to adjust the recording/reproducing time without being influenced by a tape damage.

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 Heretofore, as shown in FIG. 8, a tape cassette has been proposed by the applicant of the present invention (actual application No. 2-72496) as a tape cassette which can freely adjust the recording / reproducing time. The interlocking plate e having the adjusting button c and the tape control pin d is rotatably fitted in the recess of the supply reel b of a, and the adjusting button c is engaged with and disengaged from the connecting projection provided in the recess. So that the supply reel b and the interlocking plate e can rotate integrally or relative to each other, and the tape is sent out by the control pin d.
Therefore, there is a tape cassette that is stopped at a predetermined position.

[0003]

However, if the control pin d is used to stop the feeding of the tape at an arbitrary position in the lengthwise direction of the tape a, the tape is played back to the time adjustment position, and the tape is fed by fast-forwarding. Then, the control pin puts tension on the tape to stop the running, and as a result, the control pin directly collides with the magnetic surface of the tape, causing serious damage to the tape and causing dropout etc. It becomes a problem. The present invention intends to eliminate these drawbacks properly, and a control pin for stopping the feeding of the tape does not directly apply tension to the tape in order to make 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 rotation of the reel can be safely stopped, the tape is not damaged, and the durability and cost are high.

[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. In the magnetic tape cassette in which the adjusting plate 6 for rotatably mounting the feeding reel 3 and the interlocking plate 5 and the control pin 7 for stopping tape feeding are provided on the interlocking plate 5, the magnetic tape 2 The control pin guide member 17 is rotatably supported on the case 1 by a rotating shaft 17 ₁ so that the front ends of the tape magnetic surface side and the tape back surface side are always in contact with each other. It is a magnetic tape cassette.

[0005]

The interlocking plate 5 in the recess 13 of the supply reel 3 is rotatably fitted by the locking portion 16 so as not to be pulled out in the axial direction, and the adjustment button 6 is formed on the case 1. Position (lock OFF) fitted in the opened opening 14
, The interlocking plate 5 is separated from the supply reel 3 and is in a stationary state, the end portion 7 ₂ of the control pin 7 is located at a position radially outward of the magnetic tape 2, and the control pin guide It is located between the 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 as in the case of a conventional general cassette tape. Also, adjust button 6
The pushing, second position was mole on the inner surface of the case and (lock ON), closes the opening 14 in the slide shutter 14 _1, interlock plate 5 and the supply reel 3 engaged with the projection 15 of the supply reel 3 Rotate together, and the control pin 7 also rotates at the same time as the interlocking plate 5 rotates. Originally, the control pin 7 is the control pin guide member and the tape 2 when the lock is OFF.
Since it was located between the part that extends in the tangential direction, if the interlocking plate 5 rotates as it is, the interlocking plate 5
The free end 7 ₂ of the axially supported by the control pin 7 engages the control pin guide member 17 to stop the rotation of the supply reel 3, thereby (not shown) of a tape recorder tension detecting mechanism
Is activated and the running of the tape 2 is stopped, and stable switching can be performed without rubbing the tape.

[0006]

1 to 7, 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 protruding inward in the radial direction at equal intervals, one of which is a tape end fixing portion. Has been formed.

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 pawl engaging portion 16.
It is fitted with. The interlocking plate 5 is made of a synthetic resin material and has an annular flange portion 5 protruding outward from the upper edge of the cylindrical wall 5 _1.
2 and a ring-shaped flange portion 5 ₃ protruding inward at the lower edge, which is a donut shape. A control pin 7 is provided on the outer peripheral portion of the upper surface of the ring-shaped flange portion 5 _2. adjustment button 6 via the support portion ₆₁ on the outer circumference of the diametrically opposite are provided through or spring integrally molded of a flexible material such as a synthetic resin material.

[0008] Incidentally, the control pin 7, a mounting base ₇₁ which is rotatably supported pivot parallel shaft hole to the axis of rotation of the folded supply reel 3 to a substantially U-shape, parallel to the lower and further axial bore A free end portion 7 ₂ along the peripheral surface of the winding tape extending in the direction of the arrow. The control pin 7 is attached to the mounting base 7
The free end 7 ₂ can rotate around ₁ and come into contact with the surface of the magnetic tape 2. This control pin 7
Is a solid or hollow tube, but is preferably made of a non-magnetic metal material, and the mounting base 7 ₁ and the free end 7 ₂ at the tip have a circular cross section. Mounting base 7
The annular flange portion 5 of the interlocking plate 5 is fitted into the insertion hole ₁
It is fixed to ₂ freely.

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 tape back side of the magnetic tape 2.
A control pin guide member 17 having a tape contact end 17 ₂ is rotatably provided on the case by a support shaft 17 ₁ . As the said control pin guide member 17, a lever which is curved tip portion in an arc, but the tape contact end 17 ₂ of the tip portion are rounded to Earl, the control ares tape contact ends 17 ₂ It is preferable that the pin 7 has a roundness with a diameter smaller than the radius of the free end 7 ₂ at the tip of the pin 7 so that the control pin 7 does not slip into the inside of the tape guide member 17 as well. Therefore, it is preferable that the control pin guide member 17 is a strip having a tape width and is subjected to an antistatic treatment. It is also a preferable mode to consider that the control 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, a locking portion 16 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, and the cylindrical wall 5 _{1 of the} interlocking plate 5
It is locked to an annular flange portion 5 ₃ formed at the lower edge of the lower plate, and the interlocking plate 5 is rotatably fitted in the recess 13 to form a pull-out preventing 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 ₁ It is positioned in the vertical direction by the projecting locking portion 16 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.
Relative to the supply reel 3 without being engaged with the supply reel 3, 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 (Fig. 7a).
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 bottom surface of the adjustment button 6 provided on the interlocking plate 5 is supplied. By engaging with one of the convex portions 15 formed on the reel 3, the interlocking plate 5 and the supply reel 3 cannot rotate relative to each other. In addition, when the adjustment button 6 is slid into the inner surface of the upper case, the opening 14 of the case 1 is closed by the slide shutter 14.
It is closed by ₁ so as not to interfere with the rotating operation of the interlocking plate 5, and the control pin 7 is hooked by the control pin guide member 17 and immediately before the supply reel 3 stops (FIG. 7b) to immediately after (FIG. 7c). ) And is locked by the control pin guide member 17 to apply tension to the tape. When the adjustment button 6 is in the first position inside the opening 14 formed in the case 1, the supply reel 3 and the take-up reel 4 are provided.
The magnetic tape can be freely reciprocated between and.

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, the adjustment button 6 is pushed in to the second position, and the opening 14 is closed by the slide shutter 14 ₁ . 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 with the adjustment button 6 and the supply reel 3. The interlocking plate 5 rotates integrally, and the control pin 7 moves by being hooked on the control pin guide member 17, and at the same time, engages with the control pin guide member 17, thereby increasing the tension acting on the tape 2. Then, 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 control pin guide member 17 to come 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 Is
The tape 2 can be continuously wound 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 control pin guide member 17, a control pin guide member 17, to a portion extending in the tangential direction of the tape 2, coming out sandwiched by positions At the set position, the free end portion 7 ₂ of the control pin 7 has the control pin guide member 1
7, the rotation of the supply reel 3 is stopped, whereby the tension acting on the tape 2 is increased, and the running of the tape 2 is stopped again.

When the set feeding stop position is once changed or the setting is canceled, the tape cassette stopped at the feeding stop position is taken out from the tape recorder and the slide shutter 14 ₁ is manually moved. To open the opening 14, then rotate the supply reel 3 a little,
If the adjustment button 6 is aligned with the opening 14 of the case 1, the adjustment button 6 enters the opening 14 and is brought into the first position (lock OF).
Return to F).

[0015]

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. In a magnetic tape cassette equipped with an adjusting button for releasing and a control pin for stopping tape feeding in a linking plate, it seems that the tip is always in contact with both the magnetic tape side and the tape back side of the magnetic tape. In addition, by rotatably supporting the control pin guide member to the case with the rotation shaft, when the tape running stops at the time-adjusted set position, the control pin stops by engaging with the tangential portion of the tape. Instead, by the control pin guide member in front of it, the tape is guided to a position where the tape guide member and the tape extend in the tangential direction of the tape and is guided to a position, and further engaged with the control pin guide member. Since stopping the rotation of the paper reel,
There is no collision between the magnetic surface of the tape and the control pin, it can be safely operated without damage to the tape, it is highly reliable, and the control pin can be made into a remarkably simple shape, so the recording / playback time can be adjusted. There is also a practical effect in that possible magnetic tape cassettes can be easily incorporated into an automatic assembly line for mass production and help improve 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 supply reel.

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

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

FIG. 5 is an enlarged cross-sectional view of part A of FIG.

6 is an enlarged perspective view of a control pin guide member of the embodiment of FIG.

7 is a plan view of the inside of the case showing an operating state of the embodiment of FIG. 1, (a) is a plan view of a lock OFF state, (b) is a plan view of a state immediately before the lock is stopped, and (c) is a plan view. It is a top view of the state immediately after stopping by lock ON.

FIG. 8 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 Tube 4 Winder Reel 5 Interlocking Plate 5 ₁ Cylindrical Wall 5 ₂ Annular Flange 5 ₃ Annular Flange 6 Adjustment Button 7 Control Pin 7 ₁ Mounting Base 7 ₂ Free End 9 Locking part 13 Recess 14 Opening 14 ₁ Slide shutter 15 Convex part 16 Locking part 17 Control pin guide member 17 ₁ Tape contact end 17 ₂ Rotating shaft

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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] 0005

[Correction method] Change

[Correction content]

[0005]

The interlocking plate 5 in the recess 13 of the supply reel 3 is rotatably fitted by the locking portion 16 so as not to be pulled out in the axial direction, and the adjustment button 6 is formed on the case 1. Position (lock OFF) fitted in the opened opening 14
When in the interlocking plate 5 is in a stationary state be separated from the supply reel 3, the end 7 ₂ of the control pin 7 at a position spaced radially outwardly of the magnetic tape 2, and the control pin guide It is located between the 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 as in the case of a conventional general cassette tape. Further, adjustment button by closing the opening 14 in the slide shutter 14 ₁ 6
When the second position (lock ON) is reached by pushing in the inner surface of the upper case, the convex portion 15 of the supply reel 3 is engaged with the supply reel 3 and the interlocking plate 5 to rotate integrally. At the same time as the plate 5 rotates, the control pin 7 also rotates. Originally, the control pin 7 was located between the control pin guide member and the portion extending in the tangential direction of the tape 2 when the lock was turned off. Free end 7 of pivotally supported control pin 7
₂ is engaged with the control pin guide member 17 and the supply reel 3
The rotation of the tape is stopped, whereby the tension detection mechanism (not shown) of the tape recorder is activated to stop the running of the tape 2, and the tape can be stably switched without rubbing.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

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 pawl engaging portion 16.
It is fitted with. Annular flange portion 5 which is projected outward in the interlock plate 5 is the upper edge of the cylindrical wall 5 ₁ made of a synthetic resin material
_2, those donut-shaped having an annular flange portion 5 ₃ which is protruded inward the lower edge is provided with a control pin 7 on the upper surface outer peripheral portion of the annular flange portion 5 _2, the An adjusting button 6 is integrally formed of a flexible material such as a synthetic resin material or provided via a spring on the outer peripheral portion on the diametrically opposite side.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

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. Remove the cassette tape from the tape recorder and open it.
The push the control button 6 by closing the slide shutter 14 _1, the second position was dive in upper case inner surface. 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 with the adjustment button 6 and the supply reel 3. The interlocking plate 5 rotates integrally, the control pin 7 is hooked on the control pin guide member 17 and moves, and at the same time, engaged with the control pin guide member 17,
As a result, the tension acting on the tape 2 is increased and the tape running is stopped.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3] ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 3, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 5]

[Figure 6]

[Figure 4]

[Figure 7]

[Figure 8]

Claims (4)

[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. And a control pin 7 for stopping the tape feeding in the interlocking plate 5, the magnetic tape 2
The control pin guide member 17 is rotatably supported on the case 1 by a rotating shaft 17 ₁ so that the front ends of the tape magnetic surface side and the tape back surface side are always in contact with each other. A magnetic tape cassette. 2. The control pin guide member 17 is a lever whose tip portion is curved in an arc shape, and a tape contact end 17 ₂ of the tip portion is rounded from a free end portion 7 ₂ of the tip end of the control pin 7. The magnetic tape cassette according to claim 1, which has a roundness of a small diameter. 3. The magnetic tape cassette according to claim 1, wherein the control pin guide member 17 is a strip having a tape width and is subjected to antistatic treatment. 4. The control pin guide member 17 includes a spring biased in the reel hub axial direction.
Or the magnetic tape cassette described in 3.