JPH0573767U - Magnetic tape cassette - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To suppress vibration and noise due to contact with the slider when adjusting the time of the magnetic tape cassette that can adjust the recording / playback time. [Structure] A case 1 is provided with an opening 14 into which the adjusting button 6 is fitted when the supply reel 3 is rotated relative to the interlocking plate 5, and a slider 15 is provided in the opening 14 so as to be openable and closable. The opening 15 is provided with the slider 15 having the same thickness and thickness as the distance from the case inner surface 11 of the case ₁ to the sliding guide groove upper surface 16 of the slider 15, and the slider 15 contacts the adjustment button 6. In this case, the contact surface 15 ₁ of the slider 15 is located on the same plane as the case inner surface 1 ₁ , so that when the adjustment button is made to go under the case inner surface and pass through the opening closed by the slider, Since the slider and the inner surface of the case are flush with each other, smooth running operation is possible, and no vibration or noise is generated during play, fast forward, or rewind, and wow and flutter is not adversely affected. You can simplify the adjustment handling operation of reliable recording time.

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, at any position in the length direction of the tape, it was set overnight to loosely fit and support the interlocking plate that engages and disengages with the supply reel for stopping the feeding of the tape in the recess of the supply reel. When the feed stop position is changed or the setting is canceled, the adjustment button is fitted into the case opening for resetting or set by opening and closing the opening with a slider. This slider requires a clearance between the slider and the case to slide on the case, and when the slider closes the opening and the adjustment button passes under the slider, a step difference occurs between the case and the slider. This would cause a large vibration, which would cause noise during play, fast-forward, or rewind, which would adversely affect wow and flutter, which was a problem. 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 by the slider when passing through the adjustment button for operating, does not generate vibration or noise with the case, and has a simple structure. is there.

[0004]

[Means for Solving the Problems]

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 winding reel 4, and an interlocking plate 5 is rotatably provided on the supply reel 3 and supplied. The interlocking plate 5 is provided with an adjusting button 6 for engaging and disengaging the reel 3 and the interlocking plate 5, and a control pin 7 for stopping tape feeding, and when the supply reel 3 rotates relative to the interlocking plate 5. An opening 14 in which the adjusting button 6 is inserted is provided in the case 1, and a slider 15 is provided in the opening 14 so as to be openable and closable. A sliding guide groove of the slider 15 from the case inner surface 1 ₁ of the case 1 is provided. A slider 15 having the same thickness as the distance to the upper surface 16 is provided in the opening 14, and when the slider 15 is brought into contact with the adjusting button 6, the contact surface 15 ₁ of the slider 15 has an inner surface 1 _{1 of the} case. Configuration located on the same plane as A magnetic tape cassette, characterized in that the.

[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 position) 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. The ends 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 from the start end to the end of the magnetic tape 2. Further, when the adjustment button 6 is pushed in and the opening 14 is closed by the slider 15 so that the second position (set position) is also obtained by moving it to the inner surface of the upper case, the sliding guide groove of the slider 15 from the inner surface 1 ₁ of the case 1 is closed. Since the slider 15 has the same dimension and thickness as the distance to the upper surface 16, the contact surface 15 ₁ of the slider 15 is located on the same plane as the inner surface 1 _{1 of the} case, and the adjustment button 6 is protruded from the supply reel 3. The supply reel 3 and the interlocking plate 5 are engaged with the portion 17 and integrally rotate to smoothly rotate. 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 peripheral portion of the tape 2 wound around the supply reel 3, also extends in the tangential direction. Move towards the part. When the end of the control pin 7 is engaged with the tape portion extending in the tangential direction and the supply reel 3 and the interlocking plate 5 are further rotated, the end of the control pin 7 swings around the bearing and the interlocking plate moves. Move along with 5. Therefore, the portion of the tape 2 extending in the tangential direction is pulled in the rotation direction of the supply reel 3 by the end portion 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) is actuated to stop the running of the tape 2, and the predetermined time can be adjusted.

[0006]

【Example】

 1 to 6, 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 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 that defines the recess 13 is provided with a plurality of locking projections 17 that project 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 interlocking plate 5 is made of a synthetic resin material and has a cylindrical wall 5.₁An annular flange 5 protruding outward on the upper edge₂And an annular flange portion 5 which is provided at the lower edge so as to project inwardly. ₃ The annular flange portion 5 having a donut shape with₂A control pin 7 is provided on the outer peripheral portion of the upper surface of the, and a support portion 6 is provided on the outer peripheral portion on the diametrically opposite side.₁The adjustment button 6 is integrally formed of a flexible material such as a synthetic resin material or is provided through 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 17 of the recess 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.

In this case, as shown in FIGS. 5 and 6, the slider 15 having the same thickness as the distance from the case inner surface 11 of the case ₁ to the slide guide groove upper surface 16 of the slider 15 is provided in the opening portion 14. The contact surface 15 ₁ of the slider 15 is located on the same plane as the inner surface 1 _{1 of the} case when the slider 15 contacts the adjustment button 6. Immediately, considering the clearance c between the upper surface 15 _{2 of the} slider 15 and the sliding guide groove upper surface 16, the thickness t of the slider 15 is equal to the distance H from the case inner surface 1 ₁ to the sliding guide groove upper surface 16 of the slider. and then, it is not intended to be a step between the casing surface 1 ₁ in passing through the control button 6 is hit.

Further, the slider 15 is provided with an operating projection 15 ₃ on its upper surface 15 _2, the top surface of the protrusion 15 ₃ protrude upward from the slide guide groove top surface 16 and the lower side of the case upper surface It is considered to be located.

Further, the locking portion 9 is an undercut claw or ring protruding from the outer periphery of the drum inner cylindrical portion 3 ₁ of the supply reel 3, which is below the cylindrical wall 5 ₁ of the interlocking plate 5. intended to be engaged in the annular flange portion 5 ₃ formed on the edge, interlock plate 5 has become 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, and the cylindrical portion 3 _It is positioned in the vertical direction by the locking portion 9 protruding from the position 1 so that it can rotate stably. When the adjusting button 6 is in the first position, that is, when it is fitted in the opening 14 formed in the case 1, the interlocking plate 5 does not engage with the convex portion 17 formed on the supply reel 3. With respect to the supply reel 3, relative rotation around the rotation axis is possible, and the magnetic tape can be freely reciprocated between the supply reel 3 and the take-up reel 4. When the adjustment button 6 is pushed downward to the second position, and when the adjustment button 6 has also sunk into the inner surface of the case 1, the cam portion 6 _{3 on} the bottom surface of the adjustment button 6 provided on the interlocking plate 5 supplies. By engaging with one of the convex portions 17 formed on the reel 3, the interlocking plate 5 and the supply reel 3 cannot rotate relative to each other. It should be noted that when the adjustment button 6 is sunk into the inner surface of the upper case, the opening 14 of the case 1 is closed by a slider 15 serving as a shutter so that the rotating operation of the interlocking plate 5 is not hindered.

The opening 14 can be selected depending on the position where the adjustment 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 circle. The slider 15 may be slid on the arc as the opening 14.

For example, when it is desired to repeat the reproduction within a specific range of the entire length of the already recorded magnetic tape 2, the tape length adjusting device is operated at the position of the last magnetic tape to be reproduced. First, the tape cassette is loaded into the tape recorder and a reproducing operation is performed, and when the end of the reproduction target range is reached, the tape running is stopped. Next, 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 15. 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 before removal. The supply reel 3 starts to rotate counterclockwise in response to the rotational force from the tape recorder, but the convex portion 17 of the supply reel 3 adjacent to the adjustment button 6 immediately engages with the cam portion of the adjustment button 6, The supply reel 3 and the interlocking plate 5 rotate integrally, and the tension applied to the tape 2 by the control pin 7 is increased to stop 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. 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 7, 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 15 by hand. When the opening 14 is opened by opening the adjustment button 6, the adjustment button 6 is located at the opening 14 and is returned to the first position.

[0018]

[Effect of the 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 a supply reel and an interlocking plate are disengaged from each other. In addition to providing the interlocking plate with a control pin for stopping the tape feeding, the case is provided with an opening for inserting the adjustment button when the supply reel rotates relative to the interlocking plate. The slider is arranged to be openable and closable, and a slider 15 having the same dimension thickness as the distance from the case inner surface 11 of the case ₁ to the sliding guide groove upper surface 16 of the slider 15 is provided in the opening portion 14. 1 to 5 when in contact with said regulating button 6, the abutment surface 15 ₁ of the slider 15 with the construction located within casing surface 1 ₁ and the same plane, thereby adjusting button dive the inner surface of the case the slider When passing through a closed opening, the slider and the inner surface of the case are flush with each other, so smooth running operation is possible, and vibration and noise do not occur during play, fast forward, or rewind, and wow and flutter It has highly practical effects such as highly reliable adjustment of recording time without adverse effects, simplification of handling operations, and easy incorporation into an automatic assembly line, which can improve production efficiency and reduce costs.

[Submission date] February 1, 1993

[Procedure Amendment 1]

[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 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 position) 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. The ends 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 from the start end to the end of the magnetic tape 2. Further, pushing the control button 6 by closing the opening 14 in the slider 15, when the second position was mole on the inner surface of the case (lock ON), from to case the inner surface 1 ₁ of the case 1 of the slider 15 sliding because a slider 15 having the same dimensions thickness as distance to the dynamic guide groove top surface 16, becomes the abutment surface 15 ₁ of the slider 15 is positioned at the inner surface of the case 1 ₁ flush, control button 6 is the supply reel 3 The supply reel 3 and the interlocking plate 5 are integrated with each other by engaging with the convex portion 17 and smoothly rotate. 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 that 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 rotate further, the control pin 7 swings around the bearing and the interlocking plate moves. Move along with 5. Therefore, the portion of the tape 2 extending in the tangential direction 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 ( (Not shown) is actuated to stop the running of the tape 2, and the tape can be adjusted for a predetermined time.

[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 fitted in the recess 13 of the supply reel 3 by a locking portion 9. The interlock plate 5 is provided with an 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 donut-shaped ones, soluble, such as annular flange portion 5 on the upper surface outer peripheral portion of ₂ is provided with a control pin 7, adjustment button 6 on the outer peripheral portion of the diametrically opposite side of synthetic resin material It is formed integrally with a flexible material or provided via a spring.

[Procedure 3]

[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 17 of the recess 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 4]

[Document name to be amended] Statement

[Correction target item name] 0015

[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 already recorded magnetic tape 2, the tape length adjusting device is operated at the position of the last magnetic tape 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. Next, the cassette tape is taken out from the tape recorder, and the opening 14 is closed by the slider 15 so that the adjustment button 6 is pushed in to the second position where it is submerged in the inner surface of the upper case. 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. Receiving a rotational force from the tape recorder, the supply reel 3 starts to rotate in the counterclockwise direction, the cam portion 6 ₃ adjustment button 6 to the convex portion 17 of the supply reel 3 adjacent to the control button 6, was immediately Upon engagement, the supply reel 3 and the interlocking plate 5 rotate together, and the control pin 7 increases the tension acting on the tape 2 to stop the tape running.

[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 vertical sectional view taken along the line II of FIG.

FIG. 3 is an enlarged perspective view of the interlocking plate of the embodiment of FIG. 1 viewed from above.

FIG. 4 is an enlarged vertical sectional view taken along line II-II of FIG.

5 is an enlarged explanatory view of a portion A of FIG. 2. FIG.

6 is a sectional side view taken along the line III-III of FIG. 5, showing an operating state of the slider, in which a is an explanatory diagram before passing the adjusting button and b is an explanatory diagram showing a state during passing the adjusting button.

[Explanation of symbols]

1 Case 1 ₁ Inner surface of 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 7 Control pin 7 ₁ Base end 7 ₂ Tip part 9 Locking part 13 Recessed part 14 Opening part 15 Slider 16 Sliding guide groove upper surface 17 Convex part

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[Procedure amendment]

[Submission date] February 1, 1993

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (2)

[Scope of utility model registration request] 1. 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.
Further, the interlocking plate 5 is provided with an adjusting button 6 for engaging and disengaging the supply reel 3 and the interlocking plate 5, and a control pin 7 for stopping tape feeding, and when the supply reel 3 rotates relative to the interlocking plate 5. wherein an opening 14 for the control button 6 fitted position on the case 1, there is obtained by deploying the slider 15 openably to the opening portion 14, the inner surface of the case 1 ₁ case 1
To the upper surface 16 of the slide guide groove of the slider 15 is provided with a slider 15 having the same dimension and thickness in the opening 14,
A magnetic tape cassette characterized in that the contact surface 15 ₁ of the slider 15 is located on the same plane as the case inner surface 1 ₁ when the slider 15 contacts the adjusting button 6. 2. The slider 15 is provided with an operating projection 15 ₃ on its upper surface 15 ₂ , and the top surface of the projection 15 ₃ projects above the sliding guide groove upper surface 16 and is located below the case upper surface. The magnetic tape cassette according to claim 1.