CN1202523C

CN1202523C - Magnetic tape reproducer

Info

Publication number: CN1202523C
Application number: CN 01119932
Authority: CN
Inventors: 冈美纪夫; 伊藤清行
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2000-07-05
Filing date: 2001-07-02
Publication date: 2005-05-18
Anticipated expiration: 2021-07-02
Also published as: JP3619124B2; MY129712A; CN1336657A; JP2002025151A

Abstract

The invention provides a tape player. When power is supplied, a driving motor and a solenoid are driven. In this case, the excitation time T1 of the solenoid is set longer than the time needed for one rotation of a switching gear 20. Within the excitation time T1, the locking part 53 of the tip of a locking member 50 is locked by an engaging part 25c. After the passage of the excitation time T1, the locking is released, and the switching gear 20 is rotated to lock the locking part 53 in a stopper part 25b. Thus, the operation mode of the tape player is surely set to a stop mode without using any detection switches or the like.

Description

Tape player

Technical field

The present invention relates to have the driving force moving head that can utilize motor, and then described magnetic head is set in the tape player of the changeover module of several pattern positions.

Background technology

Tape player of the prior art is that the magnetic head such as write head and/or reproduce head etc. is carried on described magnetic head base.By implementing the mode of pressing operations to being arranged on various operating switchs on the described tape player, described magnetic head base can be set in such as the pattern of broadcasting, standby mode/switchback mode, or under the exercises pattern of stop mode etc.For this occasion, magnetic head base can with respect to magnetic tape cassette along mutual direction of closing and away from each other direction implement to move, thereby can by described magnetic head is set in and tape between have the mode of the position of predetermined distance, be set under described exercises pattern.

Yet this tape player is after power connection, if mechanism is other pattern outside the stop mode, needs and can implement to detect and be back to stop mode to it.And, if make under mechanism is in such as the stop mode isotype being set at when broadcasting pattern owing to wrong, also needing can be when implementing operation that stop mode uses, and mechanism can detect and be in halted state, and implements control not start such as the mode of parts such as motor.

Therefore, this tape player of the prior art, need be provided with to magnetic head whether be positioned at each mode position place implement to detect usefulness, such as the detection components of switch etc.And described detection components is in order can implement to detect the situation that magnetic head be positioned at each mode position, also need to be provided with model number corresponding several.Therefore, having to increase mechanism's component parts number therefrom, and then the problem that manufacturing cost is risen.

And this tape player of the prior art mainly is by o being implemented the mode of energising, being set under the pattern of broadcasting.For this occasion, need in the operational process of the pattern of broadcasting, o be implemented to continue excitation, thereby also have the many problems of electric power that consume.

Summary of the invention

The present invention addresses the above problem, purpose of the present invention just provides a kind of detection components that no longer needs to be provided with head position, also each pattern can be correctly set, but also the tape player that is in the power consumption of broadcasting pattern o of following time can be reduced.

A kind of tape player provided by the invention, has magnetic head, make described magnetic head and the contacted stop position of broadcasting the position and leaving of tape by the tape place between implement the cam of mobile usefulness, the switching gear that rotates with described cam, with transmission of power to described switching with the driven wheel at gear place, described switching is implemented the latch that breech lock is used with gear, and the o that makes described latch action usefulness

Be provided with first joint portion that is positioned at the described usefulness that combines with described latch when broadcasting the position when described magnetic head with the gear place in described switching, second joint portion of the usefulness that when described magnetic head is positioned at described rest position, combines with described latch, the 3rd joint portion between first joint portion and second joint portion, and be in toothless portion) with described driven wheel relative position place when combining with described latch in described each joint portion, it is characterized in that

According to when described switching is rotated with gear, first joint portion, the 3rd joint portion, second joint portion are implemented configuration with the corresponding mode of described latch to described each joint portion successively,

When described o is in nonexcited state, under the pattern of broadcasting, described latch combines with described first joint portion, under stop mode, described latch combines with described second joint portion, when described o is in foment, described latch combines with described the 3rd joint portion, and according at described latch with before described second joint portion combines, the mode that described latch is combined with described the 3rd joint portion is implemented control to the foment of described o.

If adopt this form of the composition, just can by make switching with second joint portion on the gear with before latch combines, the mode that the 3rd joint portion is combined with latch is implemented reliable the setting to stop mode.And o all is in nonexcited state when being in the pattern of broadcasting and stop mode, so can also reduce power consumption.

If for instance, a kind of tape player constructed according to the invention can also be according to when the energized, make described o be in foment, and at described latch with before described the 3rd joint portion combines, make described o remain on described foment, remove excitation subsequently, thereby the mode that described latch is combined with described second joint portion is implemented control to the foment of described o.

For this occasion, the actuation duration of o can also be set at greater than described switching and implement once to rotate the needed time with gear.

If adopt this control forms,, also must be set in rest position even magnetic head is positioned at other position outside the stop position when power connection.

And, a kind of tape player constructed according to the invention can also according to when by the state of broadcasting when halted state is implemented blocked operation, make described o be in foment, and at described latch with before described the 3rd joint portion combines, make described o remain on described foment, remove excitation subsequently, thereby the mode that described latch is combined with described second joint portion is implemented control to the foment of described o.

For this occasion, the actuation duration of o can also be set at greater than latch and be left by place, second joint portion, switching is rotated with gear, and then make latch pass through first joint portion, and make the 3rd joint portion be combined in the time that described latch place needs.

If adopt this control forms, when being set under the pattern of broadcasting, and head position be positioned at broadcast outside the position such as during such as other position of stop position etc.,, also must make magnetic head be back to rest position if implement the setting operation that stop mode is used.

Therefore, if adopt aforesaid the present invention, then can be when energized, and when implementing by the pattern of broadcasting to operation that stop mode moves, must be set under stop mode, thereby the phenomenon that can prevent to be in the conflicting wrong decision state of control part and mechanism's state occurs.And, no longer need to be provided with the detection components of judging head position.

Description of drawings

Below with reference to accompanying drawing embodiments of the invention are elaborated.

Fig. 1 is the planimetric map of expression as major part in the tape player of an embodiment of the present invention.

Fig. 2 A switches the planimetric map of using the gear surface state for expression, and Fig. 2 B is the outboard profile of Fig. 2 A, and Fig. 2 C is the ground plan of the inboard state of presentation graphs 2A.

Partial plan when being in stop mode in the exercises pattern of Fig. 3 for the switching device shifter in the expression tape player.

Be in the partial plan when broadcasting pattern in the exercises pattern of Fig. 4 for the switching device shifter in the expression tape player.

Fig. 5 sets the partial plan of the intermediate settings pattern of using before the stop mode for expression.

Fig. 6 is the time plot of the manner of execution of expression o and driving motor.

Embodiment

As shown in Figure 1, on the frame 10 that is positioned within this tape player 1, be provided with wheel band roller 12.In the rear side (inner face side) of frame 10, be provided with and the described coaxial inertia roller 14 of band roller 12 of taking turns, and can implement the mode that drives to this inertia roller 14 by utilizing not shown driving motor M, the described band roller 12 of taking turns is rotated.Base portion place at described inertia roller 14 also is provided with driven wheel 30, and this driven wheel 30 can rotate with inertia roller 14.

Surface in frame 10, be provided with the magnetic head base 15 that is carrying magnetic head 11, and this magnetic head base 15 can be implemented to move along direction approaching (direction shown in the arrow Y1) and the direction of leaving (direction shown in the arrow Y2) with respect to the tape (not shown).Also be provided with not shown guide pin at these frame 10 places, thereby can make magnetic head base 15 under the guide effect of this guide pin, move as straight line along the direction shown in direction shown in the arrow Y1 and the arrow Y2.Between frame 10 and magnetic head base 15, also be provided with the elastic reaction parts S1 that constitutes by such as coil spring etc., these elastic reaction parts S1 can apply elastic reaction to magnetic head base 15 towards the direction shown in the arrow Y2.

When described magnetic head base 15 moves along the direction shown in the arrow Y1, thereby make magnetic head 11 arrive with tape slide join broadcast the position time, this tape player is in the pattern of broadcasting, when described magnetic head base 15 moves along the direction shown in the arrow Y2, when making magnetic head 11 arrive the stop position that is left by the tape place, this tape player is in stop mode.

At described frame 10 places, also be provided with and the described pinch roll 16 of being with roller 12 to be oppositely arranged of taking turns.The running roller that supports described pinch roll 16 usefulness is supported on a spool 16b place in mode free to rotate by frame 10 with arm type bar 16a.When magnetic head base 15 when the direction shown in the arrow Y1 moves, this displacing force can be by such as parts such as line style springs, be applied to described running roller with arm type bar 16a place, thereby make pinch roll 16 and wheel be with roller 12 to connect.When magnetic head base 15 when the direction shown in the arrow Y2 moves, pinch roll 16 is left by wheel band roller 12 places.

Also be provided with switching gear 20 at the inner face place of described frame 10.

Be provided with axle 21 in described switching with the central part place of gear 20, and switch with

gear

20 and 21 be supported on the frame 10 in mode free to rotate by this.Also be formed with teeth 22 in the lateral surface of switching, and described driven wheel 30 can be meshed with these teeth 22 with regulation tooth pitch with gear 20.Can pass through the effect of driven wheel 30, and described switching is rotated along the direction shown in the arrow α with gear 20.22 places also are formed with three toothless portion) 22a, 22b and 22c in described teeth.When described driven wheel 30 was positioned at the position relative with 22c with each toothless portion) 22a, 22b, the rotating force of driven wheel 30 will can not be passed to be switched with gear 20.

Shown in Fig. 2 A, Fig. 2 B, be positioned at the location about place of described switching with gear 20 lip-deep described axles 21, also projection is formed with and switches with cam 23.Central portion place at described magnetic head base 15 is formed with peristome 15b, and its a part of also flexagon becomes pressing tablet 15a.The elastic force that this pressing tablet 15a can apply by described elastic reaction parts S1 is with the outside circumference mutually crimping of described switching with cam 23.Therefore, use gear 20 when switching and rotate, and make when switching with cam 23 rotations, described magnetic head base 15 can move along the direction shown in arrow Y1 and the Y2 corresponding to the shape of switching with cam 23.

With cam 23 places, be formed with the first press section 23a, the second press section 23b and the 3rd press section 23c in described switching.The first press section 23a is one and sets the parts that stop mode is used, and as the described first press section 23a and described pressing tablet 15a mutually during crimping, magnetic head base 15 is set at (referring to Fig. 3) under the stop mode.Rotate along the direction shown in the arrow α when making to switch with gear 20, when making the second press section 23b arrive the position that to implement to push with described pressing tablet 15a, magnetic head base 15 will move along the direction shown in the arrow Y1 among the figure, and then is set at (referring to Fig. 4) under the pattern of broadcasting.And, do further to rotate along direction shown in the arrow α when making to switch with gear 20, when the 3rd press section 23c is pushed mutually with described pressing tablet 15a, magnetic head base 15 will be set at place, centre position (referring to Fig. 5).

Be positioned at shown in Fig. 2 A as described in switching with the perimembranous place, the outside of gear 20 surfaces, being formed with axle 21 is central circular muscle flank spare 24A, also is formed with circular muscle flank spare 24B in its outside.And, between described circular muscle flank spare 24A and circular muscle flank spare 24B, being formed with guide groove 24a, the part place on described guide groove 24a is formed with the guiding protuberance 24c of perimembranous direction projection toward the outer side.And described switching is oppositely arranged with the face side (the face side shown in Fig. 2 A) of gear 20 and the rear side of frame 10.

Shown in Fig. 2 C, being positioned at described switching, also be formed with and broadcast with jut (first joint portion) 25a towards the central side projection with perimembranous place, the outside inboard on the gear 20, stop with part (second joint portion) 25b.Broadcast with jut 25a and the inboard perimembranous place that stops with part 25b described, be formed with ringwise annular muscle flank spare 25A, also be formed with the 3rd outstanding joint portion 25c of perimembranous direction toward the outer side at this annular muscle flank spare 25A place, and the first undulations 25d and the second undulations 25e that constitute by face outstanding toward the outer side and low dip.

Described broadcasting with jut 25a is to set the parts that the pattern of broadcasting is used, and stopping with part 25b is to set the parts that stop mode is used.The parts that joint portion 25c uses for reliable setting stop mode.When described switching with gear 20 when the direction shown in the arrow α is rotated, describedly broadcast, stop partly (second joint portion) 25b of usefulness with jut (first joint portion) 25a, the 3rd joint portion 25c, will combine with as described later latch successively.

To shown in Figure 5, with the position that gear 20 is close, be provided with arm type bar 40 and latch 50 as Fig. 1, Fig. 3 in the rear side of frame 10 and described switching.And, the outstanding axle 41 that is provided with on the frame 10 that forms the L font substantially, described arm type bar 40 is can be supported on this axle 41 places along the mode that direction shown in arrow β 1 and the β 2 is freely rotated.Described arm type bar 40 has wrist shape portion 42 and 43, and one of them wrist shape portion 42 is arranged on the back side of frame 10 and switches with between the surface location of gear 20.Front end in described wrist shape portion 42 is formed with protuberance 42a side-prominent below mechanism, thereby can be according to the mode that can be free to slide, insert it into to described switching with within the guide groove 24a on the gear 20.The peristome 10a that is positioned at frame 10 places passes in another wrist shape portion 43, along extending by the rear side of frame 10 to the direction of its face side, and further by the surface of frame 10 towards the top projection.Pinion wheel 44 carries at described wrist shape portion 43 places, thereby makes this pinion wheel 44 can be by the following side of wrist shape portion 43, be supported on than the surface of frame 10 more towards the position at place, top.Front end at the axle 44a that supports described pinion wheel 44 usefulness is set with rotor 45.Described rotor 45 is arranged on the inner face side of frame 10, and can implement to be connected by between driving-belt (not shown) and the described inertia roller 14.

On frame 10, also be provided with hub

wheel base station

46,47 and connection gear 48.It is provided with teeth 46a in the lateral surface of a described hub wheel base station 46, so that can be meshed with described connection gear 48.When described arm type bar 40 rotates along the direction shown in the arrow β 1, and make wrist shape portion 43 and connection gear 48 each other near the time, connection gear 48 will be meshed with pinion wheel 44, and when described arm type bar 40 when the direction shown in the arrow β 2 is rotated, will remove being meshing with each other of 44 of connection gear 48 and pinion wheels.Therefore, for when described inertia roller 14 rotates, described rotor 45 and pinion wheel 44 unitary rotation, and then make connection gear 48 and pinion wheel 44 intermeshing occasions, can rotating force be passed to hub wheel base station 46 places by connection gear 48.

Latch 50 is supported on axle 51 places that projection is arranged on frame 10 medial surface places, and can freely rotate along the direction shown in arrow γ 1 among the figure and the γ 2.And, also be provided with the elastic reaction parts S2 that constitutes by such as spiral winding spring etc. at latch 50 places, thereby it is being applied the elastic force of direction shown in the arrow γ 1 in figure.On latch 50, be positioned at part place, also be provided with margining tablet 58, to limit its rotation towards direction shown in the arrow γ 1 near the Y1 side.Latch 50 also disposes towards the wrist shape portion 52 of switching with gear 20 directions.And, be provided with latching portion 53 in the front end of described wrist shape portion 52, so that it can be broadcasted with jut 25a, stop to connect with part 25b and the 3rd joint portion 25c with being formed on to switch with described on the gear 20.50 places also are formed with stop joint portion 55 at latch, so that it can be combined with the leading section of plunger 61 on the o 60 that is fixedly installed on frame 10 places.Therefore, when o 60 is implemented excitation, plunger 61 is guided when mobile towards the internal direction of o 60, latch 50 can rotate along the direction shown in the arrow γ 2.When o 60 not being implemented excitation, plunger 61 will be outstanding toward the outer side under the effect of described elastic reaction parts S2, thereby latch 50 is rotated along direction shown in the arrow γ 1.If adopt this form of the composition, just can implement to move to the position that is positioned at the latching portion 53 of front end in the wrist shape portion 52.

And, also be provided with the control part (not shown) that the driving condition and the halted state of described driving motor M and o 60 are implemented control usefulness at the place, inside of tape player 1.

Fig. 3 to Fig. 5 is the planimetric map of this tape player exercises pattern of expression, and what wherein Fig. 3 represented is stop mode, and what Fig. 4 represented is the pattern of broadcasting, and is to set the intermediate settings pattern that stop mode is used and Fig. 5 represents.Utilize this intermediate settings pattern, magnetic head is crimped on the tape gently, and then is set under standby mode or the switchback mode.Fig. 6 is the time plot of expression o and drive motor action mode.

Below the exercises pattern is described.

(stop mode)

When the stop mode that is positioned at as shown in Figure 3, driving motor M will stop operating, and driven wheel 30 also will stop action.O 60 is in nonexcited state, thereby makes latch 50 under the resilient force of elastic reaction parts S2, rotates along the direction shown in the arrow γ 1.Under the effect of described elastic force, be positioned at the latching portion 53 of front end on the latch 50, will connect with part 25b with stopping on the gear 20 with being positioned at switching, realize the stop combination therefrom.And driven wheel 30 is positioned at the position relative with toothless portion) 22a.

Magnetic head base 15 switches and supporting pressing tablet 15a, so will move along the direction shown in the arrow Y2 under the resilient force of elastic reaction parts S1 with the first press section 23a on the cam 23.

(broadcasting pattern)

For the pattern of broadcasting as shown in Figure 4, driving motor M is in driving condition, and o 60 is in nonexcited state.Therefore, latch 50 is under the resilient force of elastic reaction parts S2, to rotate along the direction shown in the arrow γ 1, connect with broadcasting on the gear 20 with jut 25a thereby make the latching portion 53 that is positioned at front end on the latch 50 and be positioned to switch.And driven wheel 30 is positioned at the position relative with toothless portion) 22c.Therefore, the driven wheel 30 that is in the rotation process will apply rotating force with gear 20 to switching.

But the protuberance 42a on the arm type bar 40 is positioned at the guiding protuberance 24c place of switching with on the gear 20, thereby arm type bar 40 can be rotated along the direction shown in the arrow β 1.Therefore, pinion wheel 44 will be meshed with connection gear 48.In other words be exactly that the rotating force of driving motor M will be passed to hub wheel base station 46 places by inertia roller 14, rotor 45, pinion wheel 44 and connection gear 48.Adopt this form of the composition, just tape can be wrapped on the hub wheel base station 46.Be positioned to switch pressing tablet 15a is being applied pressing force towards direction shown in the arrow Y1, thereby make magnetic head base 15 implement mobile and stop along the direction shown in the arrow Y1 with the second press section 23b on the cam 23.At this moment, magnetic head 11 will contact with tape, and running roller rotates along clockwise direction with arm type bar 16a, thereby can utilize pinch roll 16 and wheel band roller 12 to clamp tape.Therefore, the rotary action of wheel band roller 12 can be passed to tape by certain speed, thereby can implement record, regenerative operation with respect to tape.

And, at described stop mode and broadcasting under the pattern, all o 60 is set in nonexcited state, thereby can reduces power consumption.

(intermediate settings pattern)

Before the stop mode of implementing as shown in Figure 4, need to adopt intermediate settings pattern as shown in Figure 5.Under this pattern, driving motor M remains on driving condition, and o 60 is in the state that continues excitation.Latch 50 rotates along the direction shown in the arrow γ 2, thereby latching portion 53 that is positioned at front end on the latch 50 and the 3rd joint portion 25c that is formed on the annular muscle flank spare 25A are connected.And driven wheel 30 is positioned at the position relative with toothless portion) 22b, will can not be passed to switching gear 20 places so be in the rotating force of the driven wheel 30 in the rotation process.

At this moment, protuberance 42a on the arm type bar 40 is positioned at the position of switching with within the guide groove 24a on the gear 20, arm type bar 40 rotates along the direction shown in the arrow β 2, thereby pinion wheel 44 is left by connection gear 48 places, make the rotating force of driving motor M can not be passed to hub wheel base station 46 places.

Pressing tablet 15a on the magnetic head base 15 will implement to support by switching with the 3rd press section 23c on the cam 23, so magnetic head 11 will move along the direction shown in the arrow Y2 slightly than being in when broadcasting pattern again.

Manner of execution to switching device shifter in the tape player describes below.

(1) initially presets

When energized or starter gear, implement this and initially preset action.When connecting the power supply of tape player 1, control part makes driving motor M be in starting state, and o 60 is implemented excitation.At this moment can with the actuation duration T1 of o 60, be set to be slightly larger than to switch and implement once to rotate the needed time as shown in Figure 6 with gear 20.

When implementing initially to preset, if mechanism is in stop mode as shown in Figure 3, then when o 60 is implemented excitation, latch 50 will rotate along the direction shown in the arrow γ 2, make latching portion 53 by the place, dip plane that is pressed in the second undulations 25e, rotate along the direction shown in the arrow α among the figure thereby make to switch with gear 25.Adopt this mode, can make to switch to be meshed with driven wheel 30, thereby can implement continuous drive to switching along the direction shown in the arrow α among the figure with gear 20 with the teeth on the gear 20 22.

With in the rotation process of gear 20, o 60 is implemented continuous pumps in switching, thereby make latching portion 53 be positioned at the lateral surface slip of switching with the annular muscle flank spare 25A on the gear 20.Therefore, when switching with gear 20 when the direction shown in the arrow α is rotated, described latching portion 53 can be crossed the first undulations 25d on the annular muscle flank spare 25A, connect with the 3rd joint portion 25c, and then will switch with gear 20 and stop at as shown in Figure 5 intermediate settings pattern place.

Under the state that is in this intermediate settings pattern, pass through after the described actuation duration T1, o 60 will be in nonexcited state, so latch 50 will be under the resilient force of elastic reaction parts S2, rotate along the direction shown in the arrow γ 1, and latching portion 53 is moved on the circumferential direction of the outside, thereby leave by 25c place, the 3rd joint portion.Therefore,, can make to stop to connect, and stop to switch the rotational action of using gear 20 with part 25b and described latching portion 53 by making described switching with the mode that gear 20 further rotates along the direction shown in the arrow α.

Adopt this form of the composition, the initial initialize operation during then by power connection even mechanism is in stop mode, also can be implemented control according to the mode that enters stop mode after making switching implement once to rotate with gear 20 again.Adopt this control mode, then when power connection, stop at outside as shown in Figure 3 the stop mode position, also can be set under stop mode certainly even switch with gear 20.

If for instance, if tape player 1 is to be stopped operation under the state of broadcasting as shown in Figure 4, so when energized, under the incentive action of o 60, latching portion 53 will be left by broadcasting with jut 25a place, and can under the effect of driven wheel 30, make to switch and rotate, latching portion 53 and the 3rd joint portion 25c are connected, and switching is stopped under as shown in Figure 5 the state with gear 20 along the direction shown in the arrow α with gear 20.When through after the described actuation duration T1, o 60 is in nonexcited state, so latching portion 53 will be left by 25c place, the 3rd joint portion, and is set in as shown in Figure 3 stop mode place.

And, when stopping the operation of tape player 1, latching portion 53 will switched with the 3rd joint portion 25c on the gear 20 and stop with the position between the part 25b, therefore switch will be in engagement with driven wheel 30 with gear 20, and driving motor M is stopped operating.If energized in this state, then driven wheel 30 is implemented operation, thereby can make the switching that is meshed with this driven wheel 30 with gear 20, begins to rotate along the direction shown in the arrow α at once.At this moment because o 60 is in foment, so latching portion 53 will be not with stop to connect with broadcasting with jut 25a with part 25b, and cross the second undulations 25e and the first undulations 25d, combine with the 3rd joint portion 25c, thereby the rotation of switching with gear 20 is stopped under as shown in Figure 5 the state.At this moment, switching will only be rotated less than implementing once to rotate needed angle with gear 20.Through after the described actuation duration T1, remove the foment of o 60, thereby latching portion 53 is left by 25c place, the 3rd joint portion, and be set under as shown in Figure 3 the stop mode.

Adopt this form of the composition,, also can when power connection, be set in reliably under the stop mode as shown in Figure 3 even just can when dump, be in halted state with gear 20 grades such as switching.

(2) by broadcasting mode shifts to stop mode

Judge that at the control part on the tape player 1 present setting pattern is under the condition of the pattern of broadcasting, if implement the setting operation of stop mode, then o 60 is in foment, and makes this foment certain time T2.This actuation duration T2 can be shown in Fig. 2 C, be set at greater than rotating along the direction shown in the arrow α with gear 20 with making switching, and then latching portion 53 is got to stop with part 25b be starting point, and by broadcasting the suitable time of angle of rotation θ when arriving 25c place, the 3rd joint portion with jut 25a.

At this moment mechanism is in the regular event state, and described control part judges that the setting pattern is the pattern of broadcasting, thereby makes mechanism's setting state under the pattern of broadcasting as shown in Figure 4.If when implementing in this state to be transferred to the operation of stop mode, o 60 will be implemented excitation according to the instruction that control part provides, and plunger 61 direction (directions towards o 60 inside) shown in the arrow Y1 in the figure is moved.Therefore, latch 50 will rotate along the direction shown in the arrow γ 2, the latching portion 53 that is positioned at front end on the latch 50 is left by broadcasting with jut 25a place, and the first undulations 25d to the lateral surface that is positioned at annular muscle flank spare 25A implements to push, thus make switch with gear 20 slightly in the figure direction shown in the arrow α do further to rotate.Adopt this mode, can make to switch to be meshed with driven wheel 30, switch with gear 20 and can rotate along the direction shown in the arrow α thereby can make with the teeth on the gear 20 22.

At this moment, because o 60 is in foment in for the time described actuation duration T2, long, so latching portion 53 must connect with the 3rd joint portion 25c, stop under as shown in Figure 5 the state thereby can make to switch with gear 20.After the described actuation duration T2 of process, o 60 is in nonexcited state, so latching portion 53 will be left by 25c place, the 3rd joint portion.Latch 50 will be under the resilient force of elastic reaction parts S2, rotate along the direction shown in the arrow γ 1, and along with the rotation of switching with gear 20, make and stop to connect with part 25b and described latching portion 53, stop to switch rotation, thereby it is set under as shown in Figure 4 the stop mode reliably with gear 20.

At this, when implementing to enter the operation of stop mode, the actuation duration T2 of o 60 was set at such as the longer time of angle of rotation θ shown in Fig. 2 C, so can implement respective handling to the emergency circumstance as described later.

If for instance, judge that when control part the setting pattern of tape player be the pattern of broadcasting, thereby mechanism be set in as shown in Figure 4 following time of the pattern of broadcasting that the fierceness that may be subjected to being produced by the outside is clashed into.For this occasion, because latch 50 is elastic forces of only passing through elastic reaction parts S2, be combined in and broadcast with jut 25a place,, and latching portion 53 is left by broadcasting with jut 25a place so latch 50 may produce mobilely under the effect of described bump.At this moment, switch and to be meshed with driven wheel 30, make and switch with gear 20, and then stop under as shown in Figure 3 the stop mode along the rotation of the direction shown in the arrow α with gear 20.In other words be exactly, judge that it is in the pattern of broadcasting even control part is in, mechanism also will be set in the wrong decision state under as shown in Figure 3 the stop mode.If be in this wrong decision state, then when implementing to be transferred to the operation of stop mode, will implement the short time excitation to o 60, make mechanism by as shown in Figure 3 stop mode, be transferred to the pattern of broadcasting as shown in Figure 4 once more.Therefore, provide the instruction that is transferred to stop mode even have control part, mechanism but may be transferred to the problem of the pattern of broadcasting.

At this, can be in when broadcasting pattern by judging at control part, actuation duration of o 60 is set at the mode of described actuation duration T2, prevent to enter to aforesaid wrong decision state.

If for instance, judge tape player when control part and be set under the pattern of broadcasting, and be subjected to aforesaid bump etc. and do the time spent that mechanism may be transferred to stop mode as shown in Figure 3.If at this moment implement to be transferred to the operation that stop mode is used, o 60 will be in the continuous pump state within described actuation duration T2.Therefore, under stop mode as shown in Figure 3, latching portion 53 can be left with part 25b place by stopping, switch with gear 20 and can rotate and make along the direction shown in the arrow α, and then make latching portion 53 cross the first undulations 25d, not to connect (promptly not being set under the pattern of broadcasting) with broadcasting, but connect, stop under as shown in Figure 5 the intermediate settings pattern thereby can make to switch with gear 20 with the 3rd joint portion 25c with jut 25a.

At this, when passing through the actuation duration T2 of o 60, o 60 will be in nonexcited state, so latching portion 53 will be left by 25c place, the 3rd joint portion, move and will stop under the stop mode as shown in Figure 3.

Adopt this form of the composition, judge when control part to be in when broadcasting pattern,,, also can not stop at the pattern of broadcasting, but must enter to stop mode if implement to be transferred to the operation of stop mode even mechanism is in other pattern outside the pattern of broadcasting.And described actuation duration T2 also can be set at greater than switching with gear 20 and implement once to rotate the needed time.In other words be exactly to make actuation duration T1=actuation duration T2.

(3) by the blocked operation of stop mode to the pattern of broadcasting

In the present embodiment, implementing to be transferred to stop mode when initially presetting and broadcasting mode switch to the operation of stop mode.Therefore, when the control part judgement was in stop mode, mechanism must be in stop mode as shown in Figure 3.

When by stop mode when the pattern of broadcasting implement to be switched, can implement the excitation of short time to o 60.Adopt this mode, latching portion 53 is left with part 25b place by stopping, connect with the second undulations 25e, and under the effect of the dip plane of the second undulations 25e, make to switch and rotate, and then switching is meshed with driven wheel 30 with gear 20 along the direction shown in the arrow α with gear 20.And, rotate along the direction shown in the arrow α by switching with gear 20, can also make latching portion 53 and broadcast to connect, thereby be set under the pattern of broadcasting as shown in Figure 4 with jut 25a.

Claims

1. tape player, has magnetic head, make described magnetic head and the contacted stop position of broadcasting the position and leaving of tape by the tape place between implement the cam of mobile usefulness, the switching gear that rotates with described cam, with transmission of power to described switching with the driven wheel at gear place, described switching is implemented the latch that breech lock is used with gear, and the o that makes described latch action usefulness

2. tape player as claimed in claim 1, it is characterized in that, according to when the energized, described o is in foment, and at described latch with before described the 3rd joint portion combines, described o remains on described foment, removes excitation subsequently, so that the mode that described latch combines with described second joint portion is implemented control to the foment of described o.

3. tape player as claimed in claim 2 is characterized in that, the actuation duration of o is set at greater than described switching and implements once to rotate the needed time with gear.

4. tape player as claimed in claim 1, it is characterized in that, according to when by the state of broadcasting when halted state is implemented blocked operation, make described o be in foment, and at described latch with before described the 3rd joint portion combines, described o remains on described foment, removes excitation subsequently, so that the mode that described latch combines with described second joint portion is implemented control to the foment of described o.

5. tape player as claimed in claim 4, it is characterized in that, the actuation duration of o is set at greater than latch and is left by place, second joint portion, switching is rotated with gear, make latch pass through first joint portion, and then make the 3rd joint portion be combined in the time that described latch place needs.