CN1017573B - Automatic stop mechanism for magnetic tape recorder - Google Patents
Automatic stop mechanism for magnetic tape recorderInfo
- Publication number
- CN1017573B CN1017573B CN89101127A CN89101127A CN1017573B CN 1017573 B CN1017573 B CN 1017573B CN 89101127 A CN89101127 A CN 89101127A CN 89101127 A CN89101127 A CN 89101127A CN 1017573 B CN1017573 B CN 1017573B
- Authority
- CN
- China
- Prior art keywords
- tape
- mentioned
- pin
- sensor bar
- sensing part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 46
- 230000000903 blocking effect Effects 0.000 claims description 24
- 230000009471 action Effects 0.000 claims description 19
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000008034 disappearance Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 19
- 238000004804 winding Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 241000237509 Patinopecten sp. Species 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/10—Manually-operated control; Solenoid-operated control
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
- G11B15/093—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing driving condition of record carrier, e.g. travel, tape tension
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Unwinding Webs (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Time Recorders, Dirve Recorders, Access Control (AREA)
Abstract
An auto-stop mechanism for a tape recorder comprises a sensor having a forked cam aperture 9e. The forked cam aperture 9e has an abutting portion. The sensor is rotatable in connection with the direction of taking-up the tape. A sensor lever which is rotatable regardless of tape direction has a pin. The pin engages in the forked cam aperture. When the taking-up of the tape ends and the sensorstops rotating, the pin abuts against the abutting portion of the cam aperture to limit the swinging stroke of the sensor lever, thereby stopping the tape recorder. In the auto-stop mechanism, there is provided a mechanism for confirming the disappearance of the rotating force of the sensor by slightly rotating the sensor lever a little after the pin has collided with the abutting portion, thereby preventing erroneous auto-stop actuation if the pin catches the abutting portion during tape reversal or if the tape becomes slack.
Description
The present invention relates to because tape is out of service thereby the auto-stop mechanism of the blattnerphone that shut-down mechanism moves.
Auto-stop mechanism as existing blattnerphone, a kind of mechanism is as shown in figure 12 arranged, promptly, rotating relatively on the sensing part 9 of displacement with not shown tape take-up direction, be provided with heart-shaped two fork cam hole 9e, generally the pin 7b that keeps out of the sensor bar of irrespectively swinging with tape walking 7 cooperates with this pair fork cam hole 9e, in case the rotating force of sensing part 9 disappears, keep out pin 7b and promptly be resisted against the interior 9h place, blocking part of two fork cam hole 9e, the oscillating stroke of sensor bar 7 is limited and stops to move.
Suppose that in this auto-stop mechanism, sensing part 9 is subjected to the rotating force of direction shown in the solid arrow, sensor bar 7 is owing to cam surface 6a swings, and keeps out pin 7b now to the explanation arrow direction of Figure 10.In addition, two fork cam hole 9e desire to move to the solid arrow direction.If this situation continues, then keep out pin 7b and can enter in couple inner end 9g of fork cam hole 9e.But, if operate this moment, tape is walked round about, then because sensing part 9 is subjected to opposite rotating force, its pair fork cam hole 9e is to the dotted line direction motion of Figure 10, so, keep out pin 7b and collide with the blocking part 9h of two fork cam hole 9e sometimes, in case bump during commutation, just can take place to be held against the shortcoming that two states of pitching the 9h place, blocking part of cam hole 9e make the auto-stop mechanism action because of keeping out pin 7b.
The another one shortcoming is, in case tape looseing, causes misoperation at the time that sensing part 9 no rotating forces just can take place.
In view of the foregoing, the present invention advises a kind of auto-stop mechanism of blattnerphone, this mechanism is provided with keeping out pin and blocking part and leans after a while, shake the affirmation mechanism whether sensor bar has disappeared with the rotating force of confirming sensing part slightly, thereby prevent in the conversion of tape direction of travel, or owing to the lax misoperation that causes of tape.
The present invention rotates displacement relatively in the take-up direction that has with tape, be provided with the sensing part of two fork cam holes, and irrespectively swinging constantly with tape walking, and be provided with and above-mentioned two sensor bars of keeping out pin that cam holes match of pitching, in case the rotating force of above-mentioned sensing part disappears, the above-mentioned pin of keeping out promptly is resisted against the interior place, blocking part of above-mentioned two fork cam hole, the oscillating stroke that makes above-mentioned sensor bar is limited and in the shut-down mechanism that stops to move, be arranged on and above-mentionedly keep out pin and above-mentioned blocking part leans after a while, shake the affirmation mechanism whether above-mentioned sensor bar disappears with the rotating force of confirming above-mentioned sensing part slightly.
Accompanying drawing illustrates one embodiment of the present of invention, wherein, Fig. 1 is the exploded perspective view of blattnerphone auto-stop mechanism, Fig. 2 is the exploded perspective view that from same blattnerphone auto-stop mechanism is unloaded, Fig. 3 is the stereographic map of auto-stop mechanism, from Fig. 4 to Fig. 9 is the action specification figure of auto-stop mechanism, Figure 10 is the action specification figure of sensing part, Figure 11 is that the process with the rotation of cam gear or time is an abscissa, the clockwise rotation addendum modification of sensor bar is the action stretch-out view that ordinate is represented, Figure 12 is the planimetric map of existing auto-stop mechanism pith.
Among the figure, 6c, 7c ... confirming mechanism, 7 ... sensor bar, 7b ... keep out pin, 9 ... sensing part, 9e ... two fork cam holes, 100 ... auto-stop mechanism.
Below, by an illustrated embodiment the present invention is described.Fig. 1 is the exploded perspective view of auto-stop mechanism 100 and associated mechanisms, and Fig. 2 is the stereographic map that unloads auto-stop mechanism 100 from substrate 1, and Fig. 3 is the stereographic map of auto-stop mechanism.In Fig. 1 to Fig. 3, substrate 1 is uploaded and is placed with magnetic head base plate 10.By selecting in a plurality of control lever of button of usefulness in each action that is fixed with blattnerphone, be fixed with the recording of button 11, control lever 2 etc. again, magnetic head base plate 10 can move forward and backward.At the downside of substrate 1, what each key element that auto-stop mechanism 100 is housed was installed automatically shuts down substrate 3.
On the not shown substrate of substrate 1 downside, motor 12 is installed also.The rotation of motor 12 constant speed, and, flywheel 14 is rotated along direction shown in the arrow by belt 13.Fixing capstan 15 on the flywheel 14, this capstan 15 reach substrate 1 above.The intermediary wheel 4 that is located at above the substrate 1 passes through suitable gearing, is driven by flywheel 14 or motor 12, rotates along direction shown in the arrow.Be located at spool spindle 16,17 on the substrate 1 when not shown tape cassete is housed, respectively with its tape side with batch wheel hub for the tape of band side and cooperate free to rotately.Gear 18 is installed on the spool spindle 16 by devices such as friction gearing, and the winding intermediary wheel 19 engageable ground that make it to carry out winding during with the feeding of tape constant speed vis-a-vis.Winding intermediary wheel 19 is by bar 5 supportings.Bar 5 is bearing on the substrate 1 by axle 36 free to rotately.Winding intermediary wheel 19 passes to spool spindle 16 slowly running from the small diameter gear 4a of intermediary wheel 4.Even above-mentioned friction gearing make feeding of tape constant speed and spool spindle 16 decide between the rotating speed winding velocity contrast is arranged, do not have any impairment yet.
Also be provided with the device of not shown friction gearing etc. in addition, even so that tape is gone to the rotation of terminal, spool spindle and stopped, the rotation of motor flywheel and other necessary part also can continue.
Support pressure zone arm 20 with axle on the magnetic head substrate 10, supporting pinch roller 21 with axle on the pressure zone arm.Recording, during playback, pinch roller 21 advances, tape is clipped in and capstan 15 between, make its constant speed feeding.On magnetic head substrate 10, also fixing erase magnetic head 22, recording and playback head 23.
If auto-stop mechanism once is described, then on the installation shaft 3a that automatically shuts down substrate 3,3b, 3c, can rotate freely or be installed with rotationally cam wheel 6, sensor bar 7 and control lever 8.
The axis hole at cam wheel 6 centers is sleeved on the installation shaft 3a that automatically shuts down substrate 3 free to rotately.Cam wheel 6 has 3 cam surfaces.Cam surface 6a is roughly ellipse, and the center that surrounds is eccentric to be provided with.Cam and 6b towards the outside, are the 1st driven disc 7a guiding of sensor bar 7 from the roughly middle part of radial direction.Cam surface 6c is positioned near the periphery, slightly towards the inboard, is the 2nd driven disc 7c guiding of confirming mechanism.
On the top of the branch that stretches out to side surface direction, the 1st outstanding downwards driven disc 7a is arranged, it is relevant with the cam surface 6a and the 6b of cam wheel 6.
On the top of the branch that forwards stretches out, be provided with project upwards keep out pin 7b, it is relevant with two fork cam hole 9e of the heart of sensing part 9.
Near above-mentioned top, also have outstanding the 2nd driven disc 7c downwards as confirming mechanism, it is relevant with the cam surface 6c of cam wheel 6.
The branch that stretches out backward has two forks, and the top 7d of one of them is relative with lockplate 24, and another is flexible, and its top 7e is relative with switching motherboard 25.Lockplate 24 and switching motherboard 25 overlay configuration are applied among Fig. 1 to the right acting force by spring 26,27 respectively.
Between sensor bar 7 and control lever 8, stride and be provided with spring 28, make these two bars that anticlockwise rotating force take place.
Therefore, generally speaking, the driven disc 7a of sensor bar 7 contacts with the cam surface 6a of cam wheel 6.
Sensing part 9 is the bars that roughly are the Y font, and part having upwards outstanding axle 9a in the central, and axle 9a is inlaid in the axis hole 29a that offers from the below of the bolster 29 of spool spindle 16 free to rotately.
From a top of Y font branch a resilient branch 9b towards the bending of substantial middle U font is arranged.And, be configured to when the auto-stop mechanism 100 that assembles is installed on the substrate 1, make the top of elasticity branch 9b and upwards pushed away owing to be located at the protuberance 3d that automatically shuts down on the substrate 3.The both sides of axle 9a are erected and are provided with two projection 9c.Projection 9c passes the scallop hole 1a that offers on the substrate 1, arrives the downside 30a with the gear 30 of spool spindle 16 motions.
And, because the elasticity of elasticity branch 9b, by crimping gently all the time.
Therefore, sensing part 9 within the specific limits, displacement can rotate in the rotation direction of spool spindle 16.
One roughly downside in projection 9c erects and is provided with a projection 9d.
The top 8a of control lever 8 is resisted against on the projection 9d, applies anticlockwise rotating force to sensing part 9.The size of rotating force is set at than owing to the rotating force that produces with spool spindle 16 crimping is big.
On another branch of Y font branch, offer and have two fork cam hole 9e prolongation, heart-shaped configuration.
The pin 7b that keeps out of sensor bar 7 front ends stretches in two fork cam hole 9e.
Below the end of the bar 5 that above-mentioned winding intermediary wheel 19 is housed, protrusion tab 5a is arranged.During position when winding intermediary wheel 19 arrives winding, the joint portion 8b of protrusion tab 5a pushing control lever 8 applies the power of rotating displacement to clockwise direction to control lever.
The axle of above-mentioned intermediary wheel 4 31 is hinged on the bar 32, and bar 32 is hinged on the axle 33 by slotted hole 32a, and for the F.F. or the warp of tape, its position can be moved.In case move the position, intermediary wheel begins to carry out the transmission of fast feed or warp, and then the joint portion 32b of this bar 32 or 32c just push the joint portion 8c or the 8d of control lever 8, gives control lever 8 rotation displacement in a clockwise direction.
No matter which kind of situation, when intermediary wheel 4 was in transmit mode, control lever 8 rotated displacement to clockwise direction, and sensing part 9 breaks away from control lever 8.
Above-mentioned lockplate 24 makes the control lever 2 that is fixed with button 11 keep mode of operation.When button 11 was pressed into mode of operation, above-mentioned switching motherboard 25 just made switch 34 closures.
The end 24a of lockplate 24 and switching motherboard 25 is relative with the top 7d and the 7e of two forks of sensor bar 7 with 25a.
In case sensor bar 7 rotates to clockwise direction, just pushes this two boards, lockplate 24 is removed the interlocking with button 11, and switching motherboard 25 makes switch 34 continue to be kept closed.
If the action of the auto-stop mechanism of blattnerphone is described, Fig. 4 to Fig. 9 position of illustrating each mechanism member situation about how changing relatively with the rotation of cam wheel 6 then, and supposition pushes the spring 35 among button 11 antagonism Fig. 1 for example in order to make it carry out the playback action.
Simultaneously, because the protrusion tab 2a ' of control lever 2, switching motherboard 25 is subjected to displacement, and switch 34 is closed. Protrusion tab 2a, 2a ' are same protrusion tabs.In order to make explanation be convenient to understand, lockplate 24 and switching motherboard 25 have been made diagram arranged side by side.
So, action at the beginning, then cam wheel 6 promptly rotates to the direction of arrow.
The rotation direction of sensing part 9 is a direction shown in Fig. 4 solid arrow when playback and fast feed for example, and is the direction shown in its opposite dotted arrow during warp.
Before spool spindle 16 begins rotation, sensing part 9 is passed to spool spindle 16 but in a single day rotate, then because control lever 8 rotates displacement to clockwise direction owing to the rotating force that the front end 8a of control lever 8 is subjected to direction shown in the arrow, so sensing part 9 no longer is subjected to its influence.
Below explanation is from the state action of starting of Fig. 4.Sensor bar 7 is subjected to anticlockwise rotating force because of spring 28, but shown in the figure is the situation when the 1st driven disc 7a contacts with the farthest of the cam surface 6a of cam wheel 6.Sensing part 7 tops keep out the root 9f places of extension that pin 7b is positioned at two fork cam hole 9e of sensing part 9.
If cam wheel 6 is to direction of arrow rotation, just sensor bar 7 along the regression of cam surface 6a, to counterclockwise rotating, becomes state shown in Figure 5.
During this, if spool spindle is rotating, promptly tape is being transferred, then because be added with rotating force by being revolved on the sensing part 9, so what the wall of two fork cam hole 9e was close to sensor bar 7 tops stretched in this hole keeps out pin 7b always.
Therefore, as shown in Figure 5, when sensor bar 7 when the counter clockwise direction terminal is rotated displacement, its top keep out pin 7b in two fork cam hole 9e of sensing part 9, advance in the clear, arrive the inner end 9g of two fork cam hole 9e.
As for arriving which inner end on earth, then by the sense of rotation of spool spindle 16, promptly tape be batch, volume or warp decides soon.Figure 5 shows that the state that batches or roll up soon.
Then, sensor bar 7 rotates displacement because of the cam surface 6a of cam wheel 6 to clockwise direction.
The 1st driven disc 7a of sensor bar 7 passes between two cam surface 6a of cam wheel 6 and 6b.
The pin 7b that keeps out on sensor bar 7 tops advances along two fork cam hole 9e of sensing part 9, arrives the root 9f of extension.
During this, sensing part 9 is resisting the rotating force that is subjected to from spool spindle 16, is pulled original position.
Become state shown in Figure 4 so again, in the tape operational process, repeat the state of Fig. 4 and Fig. 5.
Suppose that now tape arrives terminal, spool spindle 16 has stopped.
After the state of Fig. 4, the anticlockwise rotation of sensor bar 7 beginnings.
But current, because spool spindle 16 stops,, keep original position so sensor bar 9 is not subjected to rotating force yet.
So the pin 7b that keeps out on sensor bar 7 tops advances in the centre of two fork cam hole 9e, meet the blocking part 9h that protrudes in heart-shaped central authorities.
Just, the counter clockwise direction of sensor bar 7 is rotated and is obstructed halfway, and Fig. 6 has provided this state.
In addition, motor 12 continues rotation, and cam wheel 6 also continues rotation, becomes shown in Figure 7.
The 1st driven disc 7a of sensor bar 7 leaves cam surface 6a.And cam surface 6b is just close soon.
At this time owing to cam surface 6b, sensor bar 7 rotates to clockwise direction significantly.This state as shown in Figure 8.
In case sensor bar 7 rotates significantly to clockwise direction, become the end 24a of the branch top 7d urge lock plates 24 of two forks, remove the locking of control lever 2, the top 7e of two forks stops switching motherboard 25 to return the state of maintained switch closure.
If cam wheel 6 continues rotation, then the 1st driven disc 7a of sensor bar 7 terminal of cam surface 6b of passing by is fallen on the cam surface 6a.
Because sensor bar 7 so the top 7d of its pair fork and 7e also stop urge lock plate 24 and switching motherboard 25, makes it be in free state to counterclockwise rotating.
Because button 11 no longer is pushed into, intermediary wheel 4, winding intermediary wheel 19 are also got back to the position of no longer transmitting rotation, so control lever 8 gives sensor bar 9 with anticlockwise rotating force to counterclockwise rotating.
Like this, just return to push-botton operation state in the past fully, can carry out operation next time, Fig. 9 is a state at that time.
Auto-stop mechanism is exactly above-mentionedly to work like that, in actual use, occurs though self-braking mistakenly situation is few, but still exists.
Figure 10 is the figure that the explanation misoperation takes place, and the two fork cam hole 9e that keep out pin 7b and sensing part 9 on sensor bar 7 tops have been exaggerated.
Situation when Figure 10 is about to become state shown in Figure 5 for the state from Fig. 4.
Among Figure 10, keep out pin 7b and move along the direction of arrow.
Two fork cam hole 9e are just wanting to move along the solid arrow direction.
Just become state shown in Figure 5 if continue such motion, but at this moment, suppose to make tape to move towards opposite operation.In this example, be to become warp from batching or rolling up soon.
So because the rotation of spool spindle 16 is reverse, two fork cam hole 9e are just to the motion of dotted arrow direction, until its wall is run into and kept out pin 7b.
Like this, keep out pin 7b and enter and an opposite just now inner end 9g ', become the state of Fig. 4 then, proceed new action like this.
But, owing to keep out pin 7b towards arrow direction,, in the moving of two fork cam hole 9e, collide its blocking part 9h sometimes if unlucky.
Have enough greatly if be passed to the rotating force of sensing part 9 from spool spindle 16, both made collision, rotate and also carry out, keep out pin 7b and can enter in the 9g ' of inner end.
But, do not want to spool spindle 16 that with unnecessary load the power that passes to sensing part 9 is just little and stop.
Therefore, if bump in the direction transformation, often lean against on couple blocking part 9h of fork cam hole 9e motionless just keep out pin 7b.
Like this just become state shown in Figure 6, and as described above, carry out following the stopping automatically of Fig. 7 and move.
Just, carried out stopping automatically action mistakenly.
In the present invention, be to utilize following affirmation mechanism to prevent this misoperation.
Whether confirming mechanism is following formation, promptly utilizes the cam surface 6c of above-mentioned cam wheel 6, after a while, the 2nd driven disc 7c that changes sense bar 7 is shaken slightly make a movement after keeping out pin 7b and blocking part 9h runs into mutually, disappear with the rotating force of confirming sensing part 9.
The action of confirming mechanism is as follows, and in Fig. 6, the cam surface 6c of cam wheel 6 is to close from the 2nd outstanding downwards driven disc 7c of a branch of sensor bar 7.
Soon both just contact, and at this moment, sensor bar 7 will rotate slightly to clockwise direction.
Therefore, the pin 7b that keeps out on the former blocking part 9h that leans against heart-shaped two fork cam hole 9e leaves blocking part 9h slightly.
At this moment, if so because of tape feeding in the other direction spool spindle 16 is rotating, then sensing part 9 rotates, keep out pin 7b then and enter in couple inner end 9g ' of fork cam hole 9e.
Therefore, can not stop action automatically.
If really be that tape has arrived terminal, spool spindle 16 has stopped, even then because the cam surface 6c of cam tooth 6, sensor bar 7 rotates slightly to clockwise direction, keep out the blocking part 9h that pin 7b leaves two fork cam hole 9e, also because of sensing part 9 not the motion, so after cam surface 6c passes through, keep out pin 7b and lean against once more on the 9h of blocking part, become state shown in Figure 7, stop action then automatically.
In addition, when the keeping out blocking part 9h that pin 7b leans against two fork cam hole 9e and go up of sensor bar 7, the cam surface 6c of cam wheel 6 can contact with the 2nd driven disc 7c of sensor bar 7, when sensor bar 7 keep out in the inner end 9g that pin 7b entered two fork cam hole 9e the time, cam surface 6c does not interfere with one another from the next door process of the 2nd driven disc 7c.
The dotted arrow of Fig. 5 illustrates the route via of this cam surface 6c.
Abscissa among Figure 11 is represented the anglec of rotation of cam wheel 6 or the process of time, and ordinate is represented sensor bar 7 rotation addendum modification along clockwise direction.
The rotation addendum modification is represented by dotted lines.If spool spindle 16 in rotation, then as previously mentioned, because the 1st driven disc 7a of sensor bar 7 is contacting with cam surface 6a always, imitates it so rotate variation, shown in dotted line A, B, C, D, change.
If sensing part 9 is stopping, then keeping out pin 7b and bump with the blocking part 9h of two fork cam hole 9e at the B place.
Can not rotate again owing to sensor bar 7 after this, so its process is shown in dotted line E.
Then, owing to cam surface 6c contacts with the 2nd driven disc 7c, so sensor bar 7 rotates to clockwise direction slightly.
Its process is shown in dotted line F.
After cam surface 6c passes through, if sensing part 9 stops, then colliding once more at blocking part 9h place, the rotation of sensor bar 9 rests on the position of G, and rotates significantly shown in H owing to follow the cam surface 6b that arrives.
If during through the F place, sensing part 9 is rotating, then because no longer take place colliding of blocking part 9h place, keep out the inner end 9g ' that pin 7b enters two fork cam hole 9e, so the rotation of sensing part 7 becomes and the identical position of coming from C of distance, later process is shown in D.
One of major reason that misoperation takes place is, the traffic direction of tape has changed when being about to arrive the B place, and this F place is afterwards reaffirmed and is repaired.
Another object of the present invention promptly prevent because of the course of action of tape looseing misoperation as follows.
Supposing and operate, desire to make the spool spindle of a side of not being with sensing part 9, is to make the spool spindle 17 of warp side batch tape in this example.
If tape takes place lax, just can occur in before slack do not batched, the spool spindle 16 of sensing part 9 place sides is in the not situation of rotation status.
Just, might be taken as tape and stop, thereby auto-stop mechanism carries out misoperation.
If ask from Fig. 4 state during Fig. 5 state variation, keep out pin 7b and when come on couple blocking part 9h of fork cam hole 9e, then be the position of the B of cam wheel 6 from Fig. 4 state arrival Figure 11, when having changeed 60 ° approximately.
If in the meantime because of tape looseing spool spindle 16 keeps motionless, then keep out pin 7b and lean against on couple blocking part 9h of fork cam hole 9e, cause to stop action automatically.
But, because that utilizes cam surface 6c and the 2nd driven disc 7c to confirm afterwards at the F place again, so as long as before this, spool spindle 16 has rotated just.
The slack of tape allows for 3.5 times between about AB, and the misoperation that causes thus can improve significantly.
If form the auto-stop mechanism of aforesaid blattnerphone, utilization is by cam surface 6c and the 2nd driven disc 7c affirmation that constitute, simple in structure mechanism, sensor bar 7 is swung slightly, make on the blocking part 9h that leans against two fork cam hole 9e to keep out pin 7b away from keyboard, whether disappear with this rotating force of confirming sensing part 9, thereby can prevent misoperation.
Because formation of the present invention as mentioned above, so can provide and have the following auto-stop mechanism that goes out the blattnerphone of chromatic effect, promptly, utilize affirmation mechanism simple in structure, sensor bar is rocked slightly, make on the blocking part that leans against two fork cam holes to keep out pin away from keyboard, whether disappear with this rotating force of confirming sensing part, to prevent misoperation etc.
Claims (1)
- A kind of auto-stop mechanism of blattnerphone, this mechanism has with the take-up direction of tape and rotates displacement relatively, be provided with the sensing part of two fork cam holes, and irrespectively do swing with tape operation always, be provided with the sensor bar of keeping out pin that cooperates with above-mentioned two fork cam holes, in case the rotating force of above-mentioned sensing part disappears, the above-mentioned pin of keeping out just is resisted against on the interior blocking part of above-mentioned two fork cam hole, the oscillating stroke of above-mentioned sensor bar is restricted and stops action, it is characterized in that, also be provided with above-mentioned and keep out pin and above-mentioned blocking part leans after a while, make above-mentioned sensor bar swing the affirmation mechanism that whether has disappeared with the rotating force of confirming above-mentioned sensing part slightly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP212362/88 | 1988-08-29 | ||
| JP63212362A JPH0690823B2 (en) | 1988-08-29 | 1988-08-29 | Tape recorder auto-stop mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1040882A CN1040882A (en) | 1990-03-28 |
| CN1017573B true CN1017573B (en) | 1992-07-22 |
Family
ID=16621295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89101127A Expired CN1017573B (en) | 1988-08-29 | 1989-02-18 | Automatic stop mechanism for magnetic tape recorder |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH0690823B2 (en) |
| KR (1) | KR910007481B1 (en) |
| CN (1) | CN1017573B (en) |
| BR (1) | BR8904337A (en) |
| GB (1) | GB2223121B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2302979B (en) * | 1995-07-04 | 1997-09-03 | Nice Young Co Ltd | Cassette playing mechanism |
| CN2343650Y (en) * | 1998-11-13 | 1999-10-13 | 李庆云 | Full-automatic stop mechanism for recorder |
| CN2350838Y (en) * | 1998-11-25 | 1999-11-24 | 李庆云 | Controller of self-stop mechanism for recorder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826089B2 (en) * | 1978-01-31 | 1983-05-31 | パイオニア株式会社 | How to drive a tape recorder |
| US4520412A (en) * | 1981-09-02 | 1985-05-28 | Pioneer Electronic Corporation | Autostop mechanism for tape recorder |
| JPS58137156A (en) * | 1982-02-09 | 1983-08-15 | Toshiba Corp | Tape end detector |
-
1988
- 1988-08-29 JP JP63212362A patent/JPH0690823B2/en not_active Expired - Fee Related
- 1988-12-28 KR KR1019880017623A patent/KR910007481B1/en not_active IP Right Cessation
-
1989
- 1989-02-18 CN CN89101127A patent/CN1017573B/en not_active Expired
- 1989-08-22 GB GB8919053A patent/GB2223121B/en not_active Expired - Lifetime
- 1989-08-29 BR BR898904337A patent/BR8904337A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2223121B (en) | 1992-04-29 |
| JPH0261848A (en) | 1990-03-01 |
| GB2223121A (en) | 1990-03-28 |
| KR900003842A (en) | 1990-03-27 |
| JPH0690823B2 (en) | 1994-11-14 |
| CN1040882A (en) | 1990-03-28 |
| BR8904337A (en) | 1990-04-17 |
| GB8919053D0 (en) | 1989-10-04 |
| KR910007481B1 (en) | 1991-09-26 |
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