CN2343650Y

CN2343650Y - Full-automatic stop mechanism for recorder

Info

Publication number: CN2343650Y
Application number: CN98243377U
Authority: CN
Inventors: 管星星
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-11-13
Filing date: 1998-11-13
Publication date: 1999-10-13
Anticipated expiration: 2008-11-13
Also published as: AU3405999A; WO2000030089A1

Abstract

The utility model relates to a full-automatic stop mechanism for recorders. The end surface of a tape-feed roller is provided with a rotation induction sheet, and a poking pin of the induction sheet can poke a rocker to swing to one direction or maintain a tendency to move to the direction. A driving end of the rocker closely contacts an eccentric circle on the end surface of a flywheel, and one side of the eccentric circle is provided with convex limit stops. One end of the rocker can induce if the tape-feed roller rotates, and the other end of the rocker can pass through the inner side or the outer side of the limit stops according to induction signals, so that the stop of the operation of a recorder is realized without interfering the operation of a recorder or generating large swing to push a locking lever to traverse. Compared with the prior art, the utility model has the advantages of less parts, high assembly precision and low transmission noise.

Description

A kind of full-automatic shut-down mechanism of sound-track engraving apparatus

The utility model relates to the full-automatic shut-down mechanism in the drive of sound-track engraving apparatus.

Sound-track engraving apparatus has a plurality of operation push-buttons to realize various duties such as recording, playback, F.F., rewinding in order to control.Each button is parallel can to vertically move respectively, there is a securing rod laterally to move perpendicular to each button, there is the lock hook on a plurality of bands inclined-plane the position of relative each button on the securing rod, when depressing certain button, the inclined-plane that this key can push lock hook makes securing rod traversing, securing rod resets according to spring force and blocks this button it can not be upspring immediately, thereby realizes the duty that this key is controlled.In working order down, to try hard to recommend moving securing rod traversing as long as there is one, can remove the locking to this key, and this key resets according to spring force just can realize stopping of this duty.

Under the duty of sound-track engraving apparatus (recording, playback, F.F., rewinding), tape is rolled onto another take-up reel from side tep reel commentaries on classics, when tape forwards the end to, auto-stop mechanism should be exported one, and to try hard to recommend moving securing rod traversing, makes sound-track engraving apparatus be returned to original state-quit work.

Early stage sound-track engraving apparatus can be realized recording, the stopping automatically of playback, is half automatic stop.Chinese patent 96240597 provides, and a kind of " the full-automatic stop device of tape transport mechanism " can realize comprising the full automatic stop of F.F., rewinding.This device is equipped with detection means on tape feed roller, this detection means is to an oscillating structural member application of force, on flywheel (by the main drive belt wheel of motor direct-drive), make a gear and the engagement of another neutral gear, and a cam is arranged on the neutral gear, this cam is also to the oscillating structural member application of force, oscillating structural member can be realized the full automatic stop after tape forwards the end under the acting in conjunction of detection means and cam.Though this device deft design but still part that hold concurrently to form is on the high side, structure is complicated partially.For this class compactness of recorder core, small and exquisite mechanical component, part is many more, and assembly precision just be cannot say for sure card more, thereby brings rotational noise bigger than normal, and the stable deviation of work is manufactured and problem such as assembly cost height.

The utility model is intended to provide the full-automatic shut-down mechanism of the simpler sound-track engraving apparatus of a kind of structure, so that its easier assurance assembling and transmission accuracy, and reduce rotational noise, reduce cost.

The full-automatic shut-down mechanism of sound-track engraving apparatus described in the utility model is equipped with the rotation sensing chip of band finger at the end face of tape feed roller, is hinged on the dial hole that fork induction end on the base plate has the groove shape, and the finger of sensing chip inserts in the dial hole and can move as camber line in dial hole.The motion track of finger and dial hole intersect at 2; be finger at two joining places to the dial hole application of force; and the application of force all produces unidirectional moment of torsion to fork on any point; the drive end of fork has slide block to contact with the driver part that produces the shutdown action; driver part is that the flywheel end face has off-centre operation; off-centre operation one side is protruded a block; the slide block of fork drive end can be between block and the off-centre operation periphery being block sideslip mistake; also can connect the push rod that can promote securing rod on the fork from the outside slip mistake away from the off-centre operation periphery of block.

The full-automatic shut-down mechanism of sound-track engraving apparatus described in the utility model, there is an end of fork whether can respond to tape feed roller in rotation, the driving force that fork its other end after not having the rotation induced signal of tape feed roller can be accepted driver part produces bigger swing, promoting the locking of the traversing releasing of securing rod to certain duty button, this key resets then that this duty stops.

The course of work of the full-automatic shut-down mechanism of described sound-track engraving apparatus will describe in detail in an embodiment, its working mechanism roughly is: rotate the friction force that sensing chip is rotated by tape feed roller, it passes to this power the induction end of fork, and to fork generation moment of torsion, make the slide block of the drive end of fork be adjacent to the eccentric wheel slippage always, be slide block from block sideslip mistake, fork can not produce bigger swing and remove to promote securing rod.When tape goes to the end, the tape feed roller stall, the induction end of fork loses the power that it is produced moment of torsion, the slide block of fork drive end has lost urgent its and has been close to the power of eccentric circumference, block can be stirred slide block from the outside slip mistake, be that block is stirred the bigger swing of fork generation, thereby it is traversing to promote securing rod, realization work stops.

Described full-automatic shut-down mechanism can be realized the automatic stop of the various duties of sound-track engraving apparatus (recording playback sound, F.F., rewinding).Save neutral gear, cam than aforesaid prior art, the rotation of its fork one end induction tape feed roller, whether the other end can rotate the driving force whether realization is accepted to shut down according to tape feed roller.Its action is direct, reliable operation, and part is less, helps guaranteeing assembly precision, helps lowering rotational noise, has reduced cost of parts and assembly cost simultaneously again.

The installation site synoptic diagram of the described mechanism of Fig. 1 on recorder core;

The cut-open view that rotates sensing chip is housed on Fig. 2 tape feed roller;

The graph of a relation of Fig. 3,4 forks and finger;

The stereographic map of Fig. 5 flywheel;

Fig. 6 is the vertical view of Fig. 5;

Fig. 7 is the cut-open view of Fig. 6;

Fig. 8,9,10,11, the 12nd, described mechanism course of work synoptic diagram;

Figure 13,14,15,16, the 17th, described mechanism course of work synoptic diagram.

Embodiment one:

On the recorder core base plate 1 shown in Figure 1 flywheel 2 is housed, fork 4, tape feed roller 5 is contained in the back of base plate 1, cannot see among the figure.Tape feed roller 5 is as Fig. 2, and its end face press-fits one by spring 7 and rotates sensing chip 6, stretches out finger 6a on the sensing chip, and sensing chip 6 can slide relatively with the end face of tape feed roller 5, also can rotate thereupon.If the finger 6a on the sensing chip is not subjected to external force, sensing chip and tape feed roller have friction force to rotate between the two thereupon, if finger is subjected to external force to limit it and can not rotates, then the end face of sensing chip relative volume belt wheel slides.

It can hinge 4g be the center swing that fork 4 is hinged on the base plate 1.The induction end 4a of fork has dial hole 4b, dial hole is in the form of slot, finger 6a on the sensing chip 6 is inserted among the dial hole 4b and can moves as camber line, the camber line motion track C of finger 6a and dial hole 4b wall are at two point (A, B) intersect, be finger only at 2 that intersect to fork 4 application of forces, the application of force direction Fa of each point or Fb are relative, and oscillation centre 4 g all have corresponding arm of force La, Lb, promptly no matter sensing chip 6 is with tape feed roller 5 forward or reverse, finger 6a is to the fork 4 eternal moments that only produce to a direction, the drive end 4d that makes fork 4 is only to a direction swing, as Fig. 3, the 4 counterclockwise directions of arrow.

The drive end 4d of fork 4 has slide block 4e to contact with driver part 3.Driver part 3 is off-centre operation 3a and block 3b of flywheel 2 ends, as Fig. 5,6,7.Flywheel 2 is the seismic element 2b of two belt pulley 2a folders that directly driven by motor.Make off-centre operation 3a at a belt pulley end face, off-centre operation one side is protruded a block 3b, the slide block 4e of fork drive end is in off-centre operation 3a one side, the off-centre operation 3a of present embodiment is interior off-centre operation, it promptly is an eccentric annulus, block 3b is in the eccentric annulus, and slide block 4e also is in the eccentric annulus.Off-centre operation 3a rotates with flywheel 2, and promptly slide block 4e slips over from the internal channel 3c between the off-centre operation 3a wall, also can pass through from the outer tunnel 3d of off-centre operation wall one side far away of block 3b.

Described working process of mechanism is shown in Fig. 8-12.If sound-track engraving apparatus is just in working order, then tape feed roller 5 rotation, no matter it is suitable, rotate counterclockwise, sensing chip 6 all is subjected to friction force and rotate thereupon.To fork 4 application of forces, dial hole 4b wall can limit finger 6a and move and promptly limit sensing chip 6 and rotate when the finger on the sensing chip touched dial hole 4b internal face.But finger can pass to fork 4 with sensing chip 6 suffered friction force, make the drive end of fork have the trend that moves to a direction constantly, can guarantee that then the slide block 4e of drive end is adjacent to the periphery off-centre operation revolution relatively of off-centre operation 3a constantly, and slide block 4e can only slip over from the internal channel 3c of nearly off-centre operation wall one side of block 3b, slide block is adjacent to the off-centre operation wall of rotation, radially make small sway along off-centre operation, amplitude of fluctuation equals eccentric throw, as Fig. 8, the work of sound-track engraving apparatus is not disturbed at this state.

If tape forwards the end to, tape feed roller 5 stops operating, and the power that finger 6a is executed fork 4 has been removed in sensing chip 6 stall thereupon, and the rotation of off-centre operation 3a can promote slide block 4e and move to outer tunnel 3d direction, as Fig. 9,10.Off-centre operation 3a continues rotation, block 3b can touch and drive the bigger amplitude of slide block 4e continuation swing and slip over from outer tunnel, and fork 4 is more significantly swung, and its push rod 4f promotes the bending touch panel 8a on the securing rod 8, and make the locking of securing rod 8 traversing releasings to operation push-button, realize quitting work automatically.

Embodiment two, as Figure 13

Off-centre operation 3a is outer off-centre operation, promptly is a cam 3a, and block 3b is in the cam 3a outside.Its course of work such as Figure 13-17, and finger 6a is during to fork 4 application of forces, and slide block 4e is adjacent to cam 3a outer wall and slides, and promptly slide block 4e slips over from the internal channel 3c between block 3b and the cam 3a, and as Figure 13,14, this state does not influence the operate as normal of sound-track engraving apparatus.

If the tape feed roller stall, finger 6a is no longer to fork 4 application of forces, and cam 3a promotes slide block 4e side shifting outside block 3b, as Figure 15.Flywheel 2 is rotated further, and block 3b promotes slide block 4e makes fork 4 produce bigger swings and to promote securing rod 8 traversing.All the other are identical with embodiment one.

Claims

1. the full-automatic shut-down mechanism of a sound-track engraving apparatus; the rotation sensing chip (6) of band finger (6a) is housed at the end face of tape feed roller (5); the induction end (4a) that is hinged on the fork (4) on the base plate (1) has the dial hole (4b) of groove shape; the finger of sensing chip (6a) inserts in the dial hole (4b); can in dial hole, move as camber line; the motion track (C) of finger (6a) and dial hole (4b) 2 points (A '; B) intersect; be finger (6a) in two joinings to dial hole (4b) application of force; and the application of force all produces unidirectional moment of torsion to fork (4) on any point; it is characterized in that; the drive end (4d) of fork (4) has slide block (4e); slide block contacts with the driver part (3) that produces the shutdown action; driver part is that flywheel (2) end face has off-centre operation (3a); off-centre operation one side is protruded a block (3b); the slide block of fork drive end (4e) can be between block (3b) and the off-centre operation (3a) being block (3b) sideslip mistake; also can be from the outside slip mistake away from off-centre operation (3a) of block (3b), fork (4) is gone up connection can promote the push rod (4f) of securing rod (8).

2. by the full-automatic shut-down mechanism of the described sound-track engraving apparatus of claim 1, it is characterized in that off-centre operation (3a) is eccentric annulus, block (4b) is located in the eccentric hoop.

3. by the full-automatic shut-down mechanism of the described sound-track engraving apparatus of claim 1, it is characterized in that off-centre operation (3a) is a cam, block (3b) is in the cam outside.