CN1037299C - Automatic turning unit in record - Google Patents

Abstract

The present invention aims to provide an automatic reversing device for recorders, which can positively convert the tape running directions of audio tapes in small space. Rotation is transferred to an edentulous gear by a slide rotating drive mechanism, and a drive gear which is engaged with the edentulous gear rotates for half circle to make a converter plate of tape running directions, which converts the tape running direction of audio tapes, move towards the left and the right and convert the tape running directions. Meanwhile, reaction force which acts on the converter plate of tape running directions at the points of mobile terminals in the left and the right directions of the converter plate of tape running directions makes the drive gear receive the action which enables the drive gear to continuously rotate towards the rotation direction, so the converter plate of tape running directions is maintained at the positions of the mobile terminals.

Description

The automatic turning device of sound-track engraving apparatus

The present invention relates to little space the sound-track engraving apparatus turning device that the tape transport direction of audiotape is positively changed by the conversion of the rotation direction of motor.

Change the sound-track engraving apparatus automatic turning device of the tape transport direction of audiotape with the rotation direction of conversion motor, as disclosed in 1991 No. 41295 communique of utility model communique of Japan, be to constitute by pinch roller throw-over gear and the throw-over gear of tape transport direction and maintaining body that the tape transport direction change-over panel that makes pinch roller throw-over gear action is remained on the terminal location that Xiang Yifang or the opposing party move.

Pinch roller throw-over gear is to move to a side or the opposing party by tape transport direction change-over panel, and the arm that forms on tape transport direction change-over panel makes the sway brace that supports pinch roller select a ground and rotates, and carries out the crimped status conversion of pinch roller with respect to its pairing capstan.

The throw-over gear of tape transport direction is by being connected Y-shaped jack back on the tape transport direction change-over panel, being arranged on the cam gear on the two ends of this jack back and the free gear that drives with the conversion of motor sense of rotation constitutes.

And, free gear is to revolve round the sun with the conversion of motor sense of rotation, free gear is selected ground and cam gear engagement, make the cam gear rotation, rotation by cam gear, arm makes jack back rotate to given direction, by the rotation of this jack back tape transport direction change-over panel is moved to a side or the opposing party.

Above-mentioned free gear, meshing always with the neutral gear that transmits the motor rotation, when the sense of rotation conversion with motor is changed the rotation side of neutral gear, rotor plate with the support activities gear, in the outer peripheral edges of neutral gear, revolve round the sun along the direction identical with the neutral gear sense of rotation.

The rotating force of this free gear is produced by the rotary load of free gear self, and for allow rotor plate often with free gear and neutral gear engagement, rotating fulcrum with the neutral gear rotating shaft coaxle supporting.

Maintaining body is made of tape transport direction change-over panel and substrate and the counter-rotating spring that is erected between them.The counter-rotating spring is made rotation with jack back when tape transport direction change-over panel being moved to surpass the position of the fulcrum of spring that reverses, the elastic force of counter-rotating spring makes tape transport direction change-over panel again after moving direction moves, and by the elastic force of counter-rotating spring tape transport direction change-over panel is remained on the mobile terminal locations.

To be free gear revolve round the sun according to the sense of rotation of motor above-mentioned automatic turning device, utilize this to change the moving direction of tape transport direction change-over panel, therefore, just the space that free gear is revolved round the sun is big, so the problem that has the part configuration on the substrate to be placed restrictions on exists.

In addition, because the rotary load with free gear self rotates rotor plate, this rotating force just extremely a little less than, therefore just must try every possible means rotary load not to be added in the rotation of rotor plate, but under the occasion that the rotary load that makes rotor plate reduces, work as sound-track engraving apparatus one sometimes and be subjected to extraneous next impact, rotor plate just rotates, cause the problem that makes the conversion of tape running direction, make the reliability decrease of device.

And, for the rotary load that reduces rotor plate on rotor plate during coating lubricating oil, the result making load increase because dust is adsorbed on the lubricating oil, and dust amount increases on the contrary.Therefore can only use extremely limited amount lubricating oil, can only smear in extremely limited place.

In addition since the counter-rotating spring as making tape transport direction change-over panel remain on locational maintaining body after Xiang Yifang or the opposing party move, therefore just need the space that the counter-rotating spring rotates, in order to ensure this space, then the configuration of part in addition on the substrate is just restricted.

The purpose of this invention is to provide the sound-track engraving apparatus automatic turning device that the little space of a kind of usefulness just can make the tape transport direction conversion of audiotape.

Sound-track engraving apparatus automatic turning device of the present invention is characterised in that it has: the revolving force of accepting motor on substrate, carry out the driven wheel of positive and negative rotation and have first, second hypodontia part, by make form between first, second hypodontia part have toothed portion to mesh to carry out positive and negative rotation with driven wheel, simultaneously when first, second hypodontia part and driven wheel face toward, the hypodontia gear that prevention is rotated to sense of rotation, with by the slip transferring structure, transmission is from the revolving force of motor output, makes the hypodontia gear to just or the starter toothed wheel of opposite spin; And have the connected part that connects with the coupling part of tape transport direction change-over panel, mesh by the toothed portion that has with the hypodontia gear, rotate half-turn or more more than half-turn slightly, simultaneously according to sense of rotation, the transmission gear that tape transport direction translation building block is moved to a side or the opposing party; With rotation terminal at this transmission gear, join with the junction surface of transmission gear, stop transmission gear to continuing the prevention part that sense of rotation is rotated.

Feature below sound-track engraving apparatus automatic turning device of the present invention also has, that is: the coupling part of above-mentioned tape transport direction change-over panel forms the dip plane, it be transmission gear about the rotation terminal on, it pushes connected part, makes transmission gear to being rotated further directive effect; In addition, device also has: be in moving commentaries on classics terminal near a side or the opposing party at transmission gear, towards making connected part and blocking portion branch join directive effect in the elastic component of transmission gear.

In addition, setting transmission gear and pressing mechanism, transmission gear is configured to and the hypodontia gearing mesh of carrying out positive and negative rotation, rotation half-turn or more a little less slightly than half-turn, simultaneously the action of the circular arc of connected part is passed to tape transport direction translation building block, tape transport direction translation building block is moved to a side or the opposing party, when not driving tape transport direction translation building block, partly face toward with the hypodontia of hypodontia gear; Pressing mechanism is at least the having before toothed portion and above-mentioned transmission gear do not mesh of hypodontia gear, and just with the opposition that acts on the tape transport direction translation building block, transmission gear is subjected to the effect that continues sense of rotation.

That is to say that the present invention proposes the automatic turning device of sound-track engraving apparatus, this device has a pair of capstan, a pair of hub of a spool and a pair of pinch roller; With tape transport direction change-over panel, it moves as straight line to a side or opposite side, makes a pair of pinch roller select a ground and is crimped on corresponding each capstan; And motor, can do positive and negative rotation, batch side hub of a spool and tape transport direction change-over panel to drive tape; When described tape transport direction change-over panel was in mobile terminal locations, the reacting force of the crimp force of pinch roller and capstan to returning the pressure directive effect, is characterized in that this device also has to this tape transport direction change-over panel:

Driven wheel, it is driven by described motor rotation;

Transmission gear, scope is freely done reciprocal rotation at a certain angle, engages with described tape transport direction change-over panel, and this change-over panel is moved to a side or opposite side;

The hypodontia wheel, has a pair of toothless portion), in 180 ° of scopes, can do reciprocal rotation, make each toothless portion) simultaneously relative at the rotation terminal location with described driven wheel and transmission gear, beyond the rotation terminal location, make between two toothless portion)s respectively have toothed portion simultaneously and described driven wheel and transmission gear) engagement;

The part that is connected with transmission gear of described tape transport direction change-over panel makes such inclined-plane, when this tape transport direction change-over panel is in mobile terminal locations, transmission gear is squeezed on the rotation terminal location;

Starter toothed wheel is accepted the rotating force of motor, the hypodontia gear is pressed into the rotation terminal location, reversing along with motor, the toothed portion that respectively has of hypodontia gear is meshed with described driven wheel and transmission gear simultaneously, the rotating force of motor is by described driven wheel, hypodontia gear and transmission gear are delivered on the described tape transport direction change-over panel, and the oppose clutch of each capstan of a pair of pinch roller is switched.

Wherein, form the prevention part of the rotation angle of the described transmission gear of restriction at the sound-track engraving apparatus substrate.

Wherein, on described tape transport direction change-over panel, form the prevention part of the rotation angle of the described transmission gear of restriction.

Sound-track engraving apparatus automatic turning device of the present invention has following effect.

It is the rotation of transmitting motor by the slip rotating actuator, the sense of rotation conversion and control hypodontia gear of the starter toothed wheel that rotates with advancing and the engagement of driven wheel, rotation by this hypodontia gear makes the conversion of tape transport direction move the driving transmission gear, because each gear does not all revolve round the sun, therefore action is more stable, again since all the axle be bearing on the substrate, so it is less to take up room.

In addition, because the transmission gear that tape transport direction change-over panel is moved is rotating on the more slightly position of half-turn or half-turn, coupling part and blocking portion branch are joined, the rotation stopping of transmission gear to the continuation sense of rotation, and the reacting force of tape transport direction change-over panel has and makes it to the join effect of direction rotation of coupling part and blocking portion branch, therefore just can remain on tape transport direction change-over panel on the position after Xiang Yifang or the opposing party move.

Even the rotation of transmission gear is made more a little less slightly than the rotation half-turn, owing to be provided with having before toothed portion do not mesh at transmission gear and hypodontia gear, just constantly make transmission gear be subjected to pressing mechanism, tape transport direction translation building block is remained on the position after Xiang Yifang or the opposing party move to the effect that is rotated further direction with acting on retroaction on the tape transport direction translation building block.

Fig. 1 is mechanism's planimetric map of the sound-track engraving apparatus of the expression first embodiment of the present invention;

Fig. 2 is the partial plan of first embodiment;

Fig. 3 is the exploded perspective view of first embodiment;

Fig. 4 is the back view of first embodiment;

Fig. 5 is the partial plan of second embodiment;

Fig. 6 is the partial plan of the 3rd embodiment;

Fig. 7 is the interactively planimetric map of the power among expression the 3rd embodiment.

Below, please refer to Fig. 1～Fig. 4 the first embodiment of the present invention is described.The sound-track engraving apparatus of Fig. 1 make on substrate 1, can be installed with freely to rotate a pair of by motor 2 drive, along capstan 3a, the 3b of same direction rotation; On the position corresponding with these capstans, a plurality of pinch roller 4a, 4b can be installed on sway brace 5a, the 5b freely to rotate; Between a pair of capstan 3a, 3b, the head installing plate 7 that magnetic head 6 is being set can be installed on the substrate 1 with freely advancing and retreat; When head installing plate 7 advanced, moves on the replay position of audiotape, magnetic head 6 contacted slidably on the audiotape of the sound-track engraving apparatus that does not have expression on the figure, the signal of resetting out.

Tape transport direction change-over panel 10 can freely be installed in to move left and right on the substrate 1 along the vertical direction with the moving direction of head installing plate 7, as described below, make tape transport direction change-over panel 10 move left and right by the tape transport direction throw-over gear on the lower surface that is arranged on substrate 1, thus the tape transport direction of conversion audiotape.

And, about 10 move by tape transport direction change-over panel, be installed in the rotating actuator that does not have expression on a pair of hub of a spool 8a, the pairing figure of 8b on the substrate with just enabling to rotate freely and select ground action.When this rotating actuator is made tape transport direction change-over panel 10 and moved into place to the left or to the right, the rotation of motor output can be selected one ground passes to pinch roller 4a, 4b and capstan 3a, 3b crimping on hub of a spool 8a, the 8b of a side.

Make pinch roller 4a, 4b select a ground be crimped on capstan 3a, the 3b corresponding with it pinch roller throw-over gear 12 by can be installed in freely to rotate on the head installing plate 7 rotor plate 13 be supported on rotationally with this rotor plate 13 on the rotor plate 13 cylindrical spring 14 with have the coupling part 15 that links to each other with rotor plate 13, the movable plate 16 that can be supported on the head installing plate 7 constitutes with moving freely.

This movable plate 16, one end is connected on the tape transport direction change-over panel 10, tape transport direction change-over panel 10 is when direction or right move into place left, and correspondingly, the coupling part 15 of movable plate 16 makes rotor plate 13 and cylindrical spring 14 together or turn right moving left.Since the rotation of this cylindrical spring 14, the front end of cylindrical spring, the nearly capstan on one side of a side joint, opposite side then leaves from the capstan of another side.

When head installing plate 7 is in replay position, because the moving of tape transport direction change-over panel 10, sway brace 5b is rotated along the front end of the cylindrical spring 14 that rotates near the direction of capstan, pinch roller is crimped on the capstan corresponding with it.

Fig. 1 represents that the pinch roller 4b on right side is crimped on the state on the capstan 3b on right side.

When tape transport direction change-over panel 10 when state shown in Figure 1 is moved to the left, coupled movable plate 16 also is moved to the left, because the moving of movable plate 16, is connected rotor plate 13 on the movable plate and prolongs clockwise direction and rotate.So cylindrical spring 14 also rotates together with rotor plate 13, the cylindrical spring front end 14a in left side prolongs counterclockwise sway brace 5a and rotates, thereby the belt wheel 4a that walks in left side is crimped on the capstan 3a.

On the other hand, because the cylindrical spring front end 14b on right side rotates the sway brace 5b counterclockwise on right side, thereby make the pinch roller 4b on right side leave capstan 3b.

When cylindrical spring 14 makes pinch roller be crimped on the corresponding capstan, the reacting force of crimp force passes to tape transport direction change-over panel 10 by rotor plate 13, movable plate 16, acts on the contrary on the tape transport direction change-over panel 10 with the moving direction of tape transport direction change-over panel.That is, reacting force has 10 effects that move right of tape transport direction change-over panel that make.

Make the tape transport direction throw-over gear of tape transport direction change-over panel 10 move left and right, as shown in Figure 2, be arranged on the lower surface of substrate.Fig. 2 is the view that is amplified around the capstan 3b on the right side of Fig. 1, represents substrate 1 and tape transport direction change-over panel 10 with double dot dash line.

Corner post (by the association part) 22a of following transmission gear 22 and chimeric guide hole 18 (association part) are being set on tape transport direction change-over panel 10, rotate by transmission gear 22 and to make corner post 22a push the side of guide hole 18, thereby the corner post 22a that is entrenched in 18 li of this guide holes makes tape transport direction change-over panel 10 overcome above-mentioned reacting force and move left and right.

Be in when making tape transport direction change-over panel 10 move to terminal also being formed with on the guide hole 18 at corner post 22a, push corner post 22a the angle, make corner post 22a be forced into dip plane 18b on terminal 1b, the 1d (prevention part) of the circular hole 1a of substrate 1 shown in Figure 3.

On the lower surface of substrate 1, the hypodontia gear 21 that be installed in flywheel 19 on the capstan 3a, faces toward with flywheel 19 all-in-one-piece pinion wheels 20 (driven wheel), the first hypodontia part 21a and this pinion wheel 20 and facing to the transmission gear 22 of the second hypodontia part 21b of hypodontia gear 21 can free rotation ground supportings on substrate 1.

On the outer peripheral edges of flywheel 19, hang and transmitting the non junction endless-belt that motor 2 rotates, when motor 2 when sense of rotation is changed, the rotation of flywheel 19 is also changed according to the sense of rotation of motor.

Diameter can be installed on the pinion wheel 20 on the above-mentioned capstan 3b freely to rotate than pinion wheel 20 littler starter toothed wheels 23, the axis hole 23a of this starter toothed wheel 23 is divided into two parts as illustrated in fig. 3, the diameter of axle with capstan 3b opens this axis hole 23, and this starter toothed wheel is pressed on the capstan 3b.This being pressed into minimum pressure just can be finished, thus the inlay resultant force of axis hole 23a and capstan 3b just extremely a little less than.

Starter toothed wheel 23 is by this inlay resultant force and the viscosity that is coated in the lubricant in the axis hole 23a, follow the rotation of capstan 3b and rotate, simultaneously, when being added to a superfluous load on the starter toothed wheel 23, will stop operating, and in axis hole 23a, produce between week and the capstan 3b periphery and skid.

As shown in Figure 3, on hypodontia gear 21, be integrally formed into often and the gear wheel in large diameter 21c of starter toothed wheel 23 engagement and toothed portion 21d is arranged and be arranged on the circular arc groove 21e of the brake rod 1c insertion on the lower surface of substrate 1 highlightedly what form between little first, second hypodontia part 21a, the 21b than this gear wheel in large diameter 21c on the diameter.

And Fig. 3 be for the gear wheel in large diameter 21c that shows hypodontia gear 21 explicitly with have the 21d of tooth portion to be represented with the state that cuts off, separates with the marriage relation of other gears.

The arc angle of circular arc groove 21e is made such size, and promptly when first, second hypodontia part 21a, 21b faced toward pinion wheel 20, terminal 21k, the 21m of brake rod 1c and circular arc groove joined.

The axis hole 21f of hypodontia gear 21 is divided into when it installs on the back shaft 1e that is arranged on the substrate 1, can open and be pressed into the last two such parts of groove 1f of back shaft 1e with back shaft 1e.And, between the outer wall and hypodontia gear 21 of the bearing portions 21g that forms this axis hole 21f, use the arm 21h of the energy elasticity displacement that faces toward abreast with hypodontia part 21a, 21b being connected.Between bearing portions 21g and arm 21h and hypodontia gear 21, also form gap 21j.

When having toothed portion 21d and pinion wheel 20 to begin to mesh, have under the situation that the tooth top of the initial tooth top of toothed portion 21d and pinion wheel 20 joins, the rotating force of pinion wheel 20 makes the displacement of this arm 21h elasticity, hypodontia gear 21 is moved to radial direction, thereby the state that this arm 21h can make tooth top join is avoided.

On transmission gear 22, corner post 22a is being provided with being in eccentric position, and this corner post is when transmission gear 22 installs on the substrate 1, inserts and by being opened in the circular hole 1a on the substrate 1, give prominence to upper surface one side, and be entrenched in 18 li of the guide holes of tape transport direction change-over panel 10 at substrate 1.

The arc angle of the circular hole 1a of substrate 1 is made such size, promptly mesh at the toothed portion 21d that has with transmission gear 22 and hypodontia gear 21, when making hypodontia gear 21 rotate than the more slightly rotation of half cycle, corner post 22a just joins with terminal 1b, the 1d of circular hole 1a.

And, from seeing as Fig. 2, shown in Figure 4 in the other direction, rotate, make tape transport direction change-over panel 10 left or when moving right at transmission gear 22 also being provided with on the lower surface of substrate 1,, the tensioning spring 24 that transmission gear 22 is continued to the sense of rotation rotary action is arranged in the rotation terminal of transmission gear 22.

The elastic force of tensioning spring 24 is pushed the projection 22b that is provided with on the eccentric position of transmission gear 22 by tensioning spring 24, to the rotation of both direction, all pushes transmission gear 22 to the terminal direction of sense of rotation.The elastic force of this tensioning spring 24 has just added that it is to make transmission gear 22 more positively remain on the auxiliary force of rotating on the terminal location.

As shown in Figure 2, under the state after tape transport direction change-over panel 10 moves right, corner post 22a is on the position just over trajectory 25 rotations that the tape transport direction change-over panel 10 by transmission gear 22 axis of rotation moves, and corner post 22a is in the state that the terminal 1b with the circular hole 1a of substrate 1 joins.

Like this, owing to produce component by the dip plane 18b of the reacting force that acts on the cylindrical spring 14 on the tape transport direction change-over panel 10 by guide hole 18, elastic force with tensioning spring 24, corner post 22a is pressed onto the terminal of circular hole 1a, thereby can positively remains on transmission gear 22 on the sense of rotation terminal location.And by transmission gear 22 is remained on the sense of rotation terminal location, tape transport direction change-over panel 10 also just is maintained on the position of moving to the right.

Below, the action of the automatic turning device of first embodiment is described.

Under the state of Fig. 1, be crimped on the capstan 3b by the pinch roller 4b that makes the right side, capstan 3b is driven by motor 2 and rotates to counterclockwise, just audiotape, is sent to right-hand from left.And the audiotape that is transferred is batched by the hub of a spool 8b on right side.

At this moment, hypodontia gear 21, as shown in Figure 2, by clockwise direction rotary action power being passed to the gear wheel in large diameter 21c that meshes with this starter toothed wheel 23 to the starter toothed wheel 23 that counterclockwise rotates.Because this rotary action power is joined a distolateral terminal 21k and the brake rod 1c of circular arc groove 21e, stoped rotation under the state that the first hypodontia part 21a and the pinion wheel 20 of hypodontia gear 21 faces toward, this rotary action power constitutes the friction force that the bearing 23a by starter toothed wheel 23 slides and produced on capstan 3a outer peripheral edges.

The transmission gear 22 that faces toward with the second hypodontia part 21b of hypodontia gear 21 makes tape transport direction change-over panel 10 move to right, thus, the reacting force of cylindrical spring 14 has the tape transport direction change-over panel 10 direction effect of moving left that makes, this acting force is pushed corner post 22a in the counterclockwise direction by the dip plane 18b of guide hole 18.

Because this rotary action power is pressed onto corner post 22a on the terminal 1b of circular hole 1a of substrate 1, transmission gear 22 is subjected to by the elastic force of tensioning spring 24 continuing to rotating the effect that the terminal direction is rotated simultaneously.

Therefore, transmission gear 22 is maintained at the state that the second hypodontia part 21b with hypodontia gear 21 faces toward, and simultaneously, is keeping the state that tape transport direction change-over panel 10 is moved to right.

When this state begins to carry out the operation of tape transport direction conversion, directly make the rotation direction conversion of motor 2.Like this, make flywheel 19, capstan 3b, pinion wheel 20, starter toothed wheel 23 towards the rotation direction conversion, the clockwise direction of starter toothed wheel 23 on Fig. 2 rotated.

So, also to change by the rotary action direction of the hypodontia gear 21 of starter toothed wheel 23 effect, hypodontia gear 21 is subjected to this rotary action and rotates to counterclockwise, has made toothed portion 21d and pinion.When hypodontia gear 21 was begun by the rotating force effect of pinion wheel 20 counterclockwise to rotate, the transmission gear 22 that the second hypodontia part 21b faces toward also and toothed portion 21d engagement is arranged began clockwise rotation.

When transmission gear 22 beginning when clockwise direction is rotated, corner post 22a is mobile in guide hole 18 on one side, Yi Bian push the side 18a of guide hole 18, make tape transport direction change-over panel 10 left direction move.Hypodontia gear 21 have toothed portion 21d to forward to change on the more slightly position of half cycles than transmission gear 22, the first hypodontia part 21a and transmission gear 22 face toward.

On the other hand, at this moment the second hypodontia part 21b and pinion wheel 20 face toward, and opposite side terminal 21m and the brake rod 1c of the circular arc groove 21e of hypodontia gear 21 join, and the rotation that is caused by pinion wheel 20 effects of hypodontia gear 21 is stopped.But, because continuing clockwise direction, starter toothed wheel 23 rotates, make gear wheel in large diameter 21c be subjected to anticlockwise rotating force, and the second hypodontia part 21b remains on the state that faces toward with pinion wheel 20 by the rotating force of starter toothed wheel 23.

By the clockwise rotation of transmission gear 22 left the tape transport direction change-over panel 10 that moves of direction make movable plate 16 left direction move, thus, coupling part 15 is rotated rotor plate 13 clockwise direction.By the rotation of rotor plate 13, cylindrical spring 14 counterclockwise rotates left side sway brace 5a, and the pinch roller 4a in left side is crimped on the capstan 3a in left side, thus make audiotape left direction send.

On the other hand, the sway brace 5b on right side is counterclockwise rotated, just make the pinch roller 4b on right side leave the upright guide shaft 3b on right side by cylindrical spring 14.

And, in the way that tape transport direction change-over panel 10 moves to the left, make rotation transmission throw-over gear action, the rotation of rotation transmission throw-over gear motor 20 passes to the recording reel shaft 8a in left side, batches the audiotape of sending from the pinch roller 4a and the capstan 3a in left side by it.And, cut off the rotation transmission of motor 2 recording reel shaft 8b to the right.

Like this, sound-track engraving apparatus automatic turning device of the present invention passes through the conversion by the rotation direction of motor 2, make the rotation direction conversion of hypodontia gear 21, transmission gear 22, tape transport direction change-over panel 10 is moved to a side or other party, thus the tape transport direction that makes audiotape to the right or left direction change.

When the capstan 3a on the left of above-mentioned left side pinch roller 4a is crimped onto goes up, the reacting force of cylindrical spring 14 has makes tape transport direction change-over panel 10 to right-hand mobile effect, and this mobile acting force makes transmission gear 22 rotate to clockwise direction by the dip plane 18b that forms on the guide hole 18 of change-over panel 10 at tape transport and pushes corner post 22a.And join with another distolateral 1d of the arc-shaped hole 1a of the corner post 22a of transmission gear 22 and substrate 1, transmission gear 22 is remained on be subjected on the position of clockwise direction rotary action.

The first above-mentioned embodiment, owing to when the conversion with motor 2 sense of rotation makes the tape transport direction conversion of audiotape, be with the gear that can be bearing in rotationally on the substrate 1, make the tape transport direction of audiotape obtain conversion, need not make the gear counter-rotating therefore the space be dwindled.

In addition, because tape transport direction change-over panel 10 is remained on the locational maintaining body that Xiang Yifang or other party move is the dip plane 18b of usefulness guide hole 18; When making transmission gear 22 turn over than the more slightly position of half cycle the prevention part 1b, the 1d that are rotated further prevention of transmission gear 22; With transmission gear 22 is subjected to the tensioning spring 24 that is rotated further the direction rotary action, thereby make the maintaining body miniaturization.And, owing to need not make each gear counter-rotating, thereby just can make the switching motion of tape transport direction carry out steadily.

The above embodiments be stoping transmission gear 22 to make two terminals that prevention part 1b, 1d that half-turn rotates make the circular hole 1a that is arranged on the substrate, but be not limited to this form, second embodiment for example shown in Figure 5,31 li of the guide holes of tape transport direction change-over panel 30, on the 31a of edge portion that corner post 22a is slidingly connected, form recess 31b, one of this recess surface as prevention part 31c, another surperficial 31d as the face of in rotational direction pushing transmission gear.

And, when the center configuration of this recess 31b is become to pass through the center of rotation of transmission gear 22,, be combined in the recess 31b by corner post 22a even transmission gear 22 rotates half-turns, tape transport direction change-over panel 10 is remained on the mobile terminal locations.

Being made corner post explanation, also can be cylinder above by association part.

Below, with reference to Fig. 6, Fig. 7 the 3rd embodiment being described, among the figure, the member identical with first embodiment represented with same-sign.

Fig. 6 is the view that amplifies around the upright guide shaft 3b in the right side of Fig. 1, represents substrate 39 and tape transport direction change-over panel 40 with double dot dash line.

On tape transport direction change-over panel 40, the pin B that is arranged on swing plate 41 (as the agitation member of the pressing mechanism) end is installed with in supported hole 40a with can move freely.

At chimeric guiding groove 41a (leader) of the cylinder 42a (by association part) that transmission gear 42 described later is being set on this swing plate 41 and the pin C on the other end.This pin C is entrenched on the direction vertical with the moving direction of tape transport direction change-over panel 40, the center of rotation of center by transmission gear 42, is entrenched in the groove 39a that is provided with on the substrate 39.

Between pin B and pin C, form guiding groove 41a.

When transmission gear 42 from state shown in Figure 6 when clockwise direction is rotated, move in guiding groove 41a by cylinder 42a, swing plate 41 is that middle heart is to counterclockwise rotating, so the pin B that is in the rotation front end makes tape transport direction change-over panel 40 move to direction shown in the arrow G with pin C just.

On the lower surface of substrate 39, be installed in locational transmission gear 42 energy free rotation ground supportings that the second hypodontia part 21b of flywheel 19 on the upright guide shaft 3b, the hypodontia gear 21 that faces toward with these flywheel 19 all-in-one-piece pinion wheels 20 (driven wheel), the first hypodontia part 21a and this pinion wheel 20 and hypodontia gear 21 faces toward on substrate 39.

On the outer peripheral edges of flywheel 19, hang the non junction endless-belt, when motor 2 when rotation direction is changed, the rotation direction of flywheel 19 is also according to the rotation direction conversion of motor.On above-mentioned upright guide shaft 3b, be provided with diameter than the littler starter toothed wheel 23 of pinion wheel 20 above pinion wheel 20, can freely rotate by the slip rotating actuator.On the hypodontia gear 21, be integrally formed into usually and circular arc groove 21e that the gear wheel in large diameter 21c of starter toothed wheel 23 engagements, the brake rod 1c that toothed portion 21d is arranged and be provided with highlightedly below substrate that forms between diameter first, second hypodontia part 21a, the 21b littler than gear wheel in large diameter 21c insert.

The arc angle size of circular arc groove 21e make when first, second hypodontia part 21a, 21b and pinion wheel 20 facing to the time, terminal 21k, the 21m of brake rod 1c and circular arc groove join.

Cylinder 42a is being set on the transmission gear 42, and it is when transmission gear 42 is installed on the substrate, is inserted through out the circular hole 39b on substrate 39, gives prominence in upper surface one side of substrate.The arc angle size of the circular hole 39b of substrate 39 make transmission gear 42 by with the engagement that toothed portion is arranged of hypodontia gear, rotate half-turn by the rotation of hypodontia gear, perhaps on the position of rotating than half-turn, terminal 39c, the 39d of cylinder 42a and circular hole join with lacking slightly.

When Fig. 7 was in the portable terminal of arrow D direction with the tape transport direction change-over panel 40 of vector representation Fig. 6, the reacting force of tape transport direction change-over panel 40 passed to the transmission power of transmission gear 42 by swing plate 41.

The reacting force F of tape transport direction change-over panel 40, along the arrow G directive effect on pin B, making swing plate 41 trend is that middle mind-set is counterclockwise rotated with pin C, this rotary action power with the power f of the limit 41b vertical direction of guiding groove 41a by being pressed in cylinder 42a chimeric in the guide channel ditch 41a.

At this moment, the vector of power f is than the line of the center P of center O that connects cylinder 42a and transmission gear 42 side that more keeps left, the vector of the component t of power f with the center O that the connects cylinder 42a direction vertical with the line of the center P of transmission gear 42 on, make the left direction of cylinder 42a towards Fig. 7.

Consequently, the component t that acts on the cylinder 42a will make transmission gear 42 to counterclockwise rotating, and still, as shown in Figure 6, the terminal 39d of the circular hole 39b of cylinder 42a and substrate 39 joins, and anticlockwise rotation is stoped.

Therefore, with the reacting force of tape transport direction change-over panel 40 transmission gear 42 is remained on the direction that trend is rotated further.When transmission gear 42 is maintained at trend following time of state of being rotated further, tape transport direction change-over panel 40 remains on a side or the opposing party's the mobile terminal locations tape transport direction change-over panel 40 by effect reacting force thereon.

In the 3rd embodiment, make transmission gear 42 continue the pressing mechanism that trend is rotated further direction by the reacting force that tape transport direction change-over panel 40 is set, even transmission gear 42 rotates the amount of spin that lacks slightly than half-turn, also can remain on tape transport direction change-over panel 40 on a side or the opposing party's the mobile terminal locations.

Be that swing plate 41 is rotated among the 3rd embodiment, but in the scope in its slewing area week in the tooth top of transmission gear 42; Because gravity treatment is configured on the transmission gear 42 and disposes, swing plate 41 does not influence the configuration of other members; In addition, owing to swing plate 41 is to rotate with the rotating force of transmission gear 42, so can obtain sufficient rotating force.

Just like the actuation gear of pushing that illustrates among first embodiment, also can form dip plane 18b for 18 li again at the guide hole of tape transport direction change-over panel 10.

Sound-track engraving apparatus automatic turning device of the present invention is owing to be the tape transport direction throw-over gear of changing the tape transport direction of audiotape with the conversion of the sense of rotation of motor, it transmits the rotation of motor by the slip rotating actuator, with the sense of rotation conversion and control hypodontia gear of the starter toothed wheel that is rotated and the engagement of driven wheel, rotation driving transmission gear by this hypodontia gear turns round half-turn at least, the tape transport direction change-over panel that links with transmission gear is moved to a side or the opposing party, the tape transport direction of conversion audiotape, need not be in order to change the tape transport direction with revolving round the sun such member, therefore the shared space of tape transport direction-changing device is dwindled, action is stable.

Claims (3)

1, a kind of automatic turning device of sound-track engraving apparatus, this device have a pair of capstan (3a, 3b), a pair of hub of a spool (8a, 8b) and a pair of pinch roller (4a, 4b); With tape transport direction change-over panel (10,30), it moves as straight line to a side or opposite side, makes a pair of pinch roller (4a, 4b) select a ground and is crimped on corresponding each capstan (3a, 3b); And motor (2), can do positive and negative rotation, batch side hub of a spool (8a, 8b) and tape transport direction change-over panel (10,30) to drive tape; When described tape transport direction change-over panel (10,30) when being in mobile terminal locations, the reacting force of the crimp force of pinch roller (4a, 4b) and capstan (3a, 3b), this tape transport direction change-over panel (10,30), be is characterized in that this device also has to returning the pressure directive effect:

Driven wheel (20), it is driven by described motor rotation;

Transmission gear (22), scope is freely done reciprocal rotation at a certain angle, engages with described tape transport direction change-over panel (10,30), and this change-over panel (10,30) is moved to a side or opposite side;

Hypodontia wheel (21), has a pair of toothless portion) (21a, 21b), in 180 ° of scopes, can do reciprocal rotation, the rotation terminal location make each toothless portion) (21a, 21b) simultaneously relative with described driven wheel (20) and transmission gear (22), rotating beyond the terminal location, (21a respectively has toothed portion (21d) simultaneously and described driven wheel (20) and transmission gear (22) engagement between 21b) to make two toothless portion)s;

The part that is connected with transmission gear (22) of described tape transport direction change-over panel (10,30) makes such inclined-plane (18b, 31d), when this tape transport direction change-over panel (10,30) when being in mobile terminal locations, transmission gear (22) is squeezed on the rotation terminal location;

Starter toothed wheel (23) is accepted the rotating force of motor (2), the hypodontia gear is pressed into the rotation terminal location, reversing along with motor (2), the toothed portion (21d) that respectively has of hypodontia gear (21) is meshed with described driven wheel (20) and transmission gear (22) simultaneously, the rotating force of motor (2) is by described driven wheel (20), hypodontia gear (21) and transmission gear (22) are delivered to described tape transport direction change-over panel (10,30) on, a pair of pinch roller (4a, 4b) oppose that each capstan (3a, switch by 3b) clutch.

2, device as claimed in claim 1, it is characterized in that sound-track engraving apparatus substrate (1) form the rotation angle of the described transmission gear of restriction (22) the prevention part (1b, 1d).

3, device as claimed in claim 1 is characterized in that going up the prevention part (31c) that forms the rotation angle that limits described transmission gear (22) at described tape transport direction change-over panel (30).

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