CN2061323U

CN2061323U - Sequence control mechanism by use of gear mechanism

Info

Publication number: CN2061323U
Application number: CN90200065U
Authority: CN
Inventors: 渡边孝
Original assignee: Tanashin Denki Co Ltd
Current assignee: Tanashin Denki Co Ltd
Priority date: 1989-03-10
Filing date: 1990-01-09
Publication date: 1990-08-29
Also published as: JPH02239453A; GB2231705B; GB9005376D0; GB2231705A

Abstract

The utility model discloses a sequence control mechanism by the use of a gear mechanism. A driving gear and a revolving arm are driven by a bidirectional rotating motor in coaxial and integral rotation. A toothed edge simultaneously stops the revolving action of the revolving arm when meshed with the driving gear. An edentulous gear wheel with toothless parts allows the revolving action of the revolving arm for linking the edentulous gear wheel, and at the same time, for the toothed edge on the revolving track of the drive gear. A first actuating mechanism applies a restoring force to the toothed edge. A second actuating mechanism is meshed with the driving gear when the driving gear passes through the toothless part of the edentulous gear. The sequence control mechanism can control the processes of driving, stop timing, changeovers of rotation directions of a motor. A plurality of acting parts can be reliably controlled in sequence.

Description

Sequence control mechanism by use of gear mechanism

The utility model relates to a kind of sequential control mechanism, and it has adopted the gear mechanism that is suitable for blattnerphone action conversion equipment for example etc.

The sequential control mechanism in past is, for example have the 1st and the 2 two operating member, torque by motor-driven driven in rotation body (for example gear), at first pass to the 1st operating member and carry out specified action, by the time after its action finishes, pass to the 2nd operating member again and carry out specified action, such sequential control mechanism is that everybody is familiar with.In such sequential control mechanism, usually on the rotation drive path of the 1st and the 2nd operating member, be provided with clutch coupling, at first the clutch of the first action part, while are disconnected the clutch coupling of the 2nd operating member, make the action of the 1st operating member, by the time after the 1st operating member is finished specified action, again the clutch coupling of the 1st operating member disconnect, simultaneously the clutch of the 2nd operating member, make the 2nd operating member carry out specified action.

This sequential control mechanism that is always adopted is owing to must be provided with clutch coupling respectively on the rotation drive path of each operating member, and must control gear be set so that the clutch time of each clutch coupling is controlled, so complex structure, and the rotation drive path of each operating member is also very complicated, Here it is problem place.

Because above-mentioned situation, the purpose of this utility model provides a kind of sequential control mechanism that adopts gear mechanism, it need not be provided with clutch coupling and electromagnet etc., and with simple composition to the control of motor-driven or the timing that stops and sense of rotation conversion thereof, can carry out sequential control accurately and reliably to a plurality of operating members.

In order to achieve the above object, the utility model adopts the sequential control mechanism of gear mechanism to have following feature structure:

Driven wheel--by the motor-driven of the positive and negative rotation of energy;

Revoliving arm--be located on the same axle with driven wheel;

Transmission gear--be bearing on the revoliving arm with axle, and link with above-mentioned driven wheel;

The hypodontia gear--having has tooth parts and anodontia portion, stops the revolution action of transmission gear when the engagement of tooth portion and transmission gear is arranged with the tooth bottom surface, then allows the revolution action for anodontia;

The 1st actuating mechanism--to make hypodontia gear interlock, above-mentionedly to have on the revolution orbit that tooth portion is in transmission gear in order making simultaneously, the hypodontia gear is applied recuperability;

During the 2nd actuating mechanism--above-mentioned transmission gear anodontia by above-mentioned hypodontia gear and this transmission gear engagement, by above-mentioned driving gear drives;

Cam and cam follower pin--the side in above-mentioned hypodontia gear and above-mentioned the 1st actuating mechanism is provided with cam, and at the cam follower pin of opposite side setting and cam engagement.

The following describes effect of the present utility model:

Motor makes driven wheel drive by a direction rotation, and what is that revoliving arm turns round by a direction, and the tooth portion that has of transmission gear and hypodontia gear meshes, and the revolution action of transmission gear is prevented from, and the hypodontia gear rotates along a direction.Because the hypodontia gear rotates to a direction, make the action of the 1st actuating mechanism.After the 1st actuating mechanism is finished specified action, because the anodontia portion of hypodontia gear forwards the position in the face of transmission gear to, the revolution action of above-mentioned transmission gear is allowed again, pass through toothless portion) with final drive gear, revoliving arm continues along a direction revolution, transmission gear and the engagement of the 2nd actuating mechanism make the 2nd actuating mechanism carry out specified action.

Thereby, clutch coupling and electromagnet etc. need be set, just can constitute motor-driven simply, stop, regularly and the control of its sense of rotation conversion, can carry out sequential control accurately and reliably to a plurality of operating members.

Below with a description of drawings embodiment of the present utility model.

Fig. 1-be provided with the utility model adopts the planimetric map of blattnerphone of the sequential control mechanism of gear mechanism;

The planimetric map of Fig. 2-sequential control mechanism part;

The action specification figure of Fig. 3 to Figure 15-sequential control mechanism;

The revolution of the revoliving arm of Figure 16-sequential control mechanism Action Specification figure that is obstructed;

Figure 17-sequential control mechanism respectively move the relevant motor sense of rotation of transition status counter-rotating regularly and the recording relevant, put the relation table diagrammatic sketch of record head position with each operating state.

In Fig. 1 and Fig. 2,1 is substrate, is respectively equipped with the free positive and negative motor rotating 2 of energy, take-up reel 3, supply reel 4 and capstan 5 on it on the appointed positions.The turning axle 2a of motor 2 is outstanding under the side direction below substrate 1, is fixing the belt pulley 6 of motor on this jag.The lower end of capstan 5 is also outstanding under the side direction below substrate 1, is fixing the flywheel 7 that the double as belt pulley is used on this jag.Non junction endless-belt 8 in package between flywheel 7 and motor belt dish 6.The take-up reel 3 in left side among the figure is provided with the take-up reel axle 3b that the coaxial one of energy rotates freely on take-up reel gear 3a.And the supply reel 4 on right side among the figure is provided with the supply reel axle 4b that the coaxial one of energy rotates freely on supply reel gear 4a.Adorning magnetic head installing plate 9 on substrate 1 also can move freely along arrow A B direction thereon.Recording, playback head 10 and eraser 11 are installed respectively on magnetic head installing plate 9.Magnetic head installing plate 9 applies acting force by magnetic head back-moving spring 12 to arrow B direction (stop position direction).On substrate 1, an end of pinch roller arm 13 is installed in also can be along arrow C on the axle 14, and the D direction rotates freely.And the other end of pinch roller arm 13, pinch roller 15 is installed on the axle 15 and can rotates freely.The other end of pinch roller arm 13 links by bar shaped pinch roller spring 17 and magnetic head installing plate 9.What is, in company with magnetic head installing plate 9 along arrow A, the moving of B direction, by the effect of pinch roller spring 17, pinch roller arm 13 is along arrow C, the D direction is rotated.And pinch roller 15 is by the tape in the tape cassete (omitting among the figure), engages with capstan 5 or separates.Pinch roller arm 13 applies acting force by pinch roller spring 17 to the direction (arrow D direction) that pinch roller 15 leaves capstan 5.On flywheel 7, be provided with the driven wheel 18 that rotates freely with its coaxial one.On the position between driven wheel 18 and the substrate 1, with the coaxial capstan 5 of driven wheel 18 on be provided with an end of the revoliving arm 19 that can freely rotate.At the other end of revoliving arm 19, there is the transmission gear 20 that meshes with driven wheel 18 can be installed on the axle 21 with rotating freely.When revoliving arm 19 is pressed clockwise direction among Fig. 2 when rotate arriving the gauge position, the take-up reel gear 3a engagement on transmission gear 20 and the take-up reel 3 makes take-up reel 3 rotations.And when revoliving arm 19 rotated arrival gauge position counter clockwise, the supply reel gear 4a engagement on transmission gear 20 and the supply reel 4 made supply reel 4 rotations.Thereby as anodontia the 23b of transmission gear 20 by the 1st or the

2nd hypodontia gear

23,24, after the 24b, take-up reel 3 or supply reel 4 with transmission gear 20 engagements, just constitute the 2nd actuating mechanism that is driven by driven wheel 18.The qualification of the gauge position that revoliving arm 19 moves in the direction of the clock, be by revoliving arm 19 substantially in the middle of on fragment 19a and the substrate 1 of place's one side an end 22a of stop block 22 dock and realize.And the qualification of the gauge position that revoliving arm 19 rotates counter clockwise, then be by revoliving arm 19 substantially in the middle of on fragment 19b and the substrate 1 of place's opposite side the other end 22b of stop block 22 dock and realize.Below substrate 1, the 1st, the 2nd and the

3rd hypodontia wheel

23,24,25 can be installed in respectively on the

axle

26,27,28 with rotating freely.The 3rd hypodontia gear 25 is arranged between the 1st hypodontia gear 23 and the 2nd hypodontia gear 24.The the 1st～the 3rd hypodontia gear 23～25 has on its periphery the 23a～25a of tooth portion and anodontia 23b～25b is arranged.There is the 23a of tooth portion～25a to stop the revolution action of transmission gear 20 to be meshed with this transmission gear 20 on one side with its tooth bottom surface on one side.Anodontia 23b～25b then allows transmission gear 20 action of revolving round the sun.On the 1st and the

2nd hypodontia gear

23,24, be provided with cam 29,30.The cam 29 of the 1st hypodontia gear 23 comprises: keep equidistant the 1st arc sections 29a with rotary middle spindle 26; The 2nd arc sections 29b that one end is connected with the end of the 1st arc sections 29a, dwindle gradually along with moving towards the other end with the distance of rotary middle spindle 26; One end is connected with the other end of the 2nd arc sections 29b, the other end is to the 1st rake 29c of rotation center lopsidedness; One end is connected with the other end of the first rake 29c, the other end is to the 2nd rake 29d of the lopsidedness of opposing rotation center; The 3rd rake 29e that the other end of the other end of the 2nd rake 29d and the 1st arc sections 29a is communicated.The cam 30 of other the 2nd hypodontia gear 24 comprises: keep equidistant the 1st arc sections 30a with rotary middle spindle 27; The 2nd arc sections 30b that one end is connected with the end of the first arc sections 30a, dwindle gradually along with moving towards the other end with the distance of rotary middle spindle 27; One end is connected with the other end of the 2nd arc sections 30b, the other end is to the 1st rake 30c of rotation center lopsidedness; One end is connected with the other end of the 1st rake 30c, the other end is to the 2nd rake 30d of rotation center lopsidedness; The 3rd rake 30e that the other end of the other end of the 2nd rake 30d and the 1st arc sections 30a is communicated.The

cam

29,30 of the 1st and the

2nd hypodontia gear

23,24, the following outstanding

cam follower pin

31,32 that is provided with magnetic head installing plate 9 is bonded together by the slotted hole 33,34 that is installed with on the substrate 1.Rotation in company with the 1st, the

2nd hypodontia gear

23,24 under the effect of

cam

29,30, makes magnetic head installing plate 9 along arrow A by

cam follower pin

31,32, and the B direction moves.Pass on the 1st, the

2nd hypodontia gear

23,24 by

cam follower pin

31,32 to the acting force that the arrow B direction applies by 12 pairs of magnetic head installing plates 9 of magnetic head back-moving spring.Make it that 23a of tooth portion be arranged thereby magnetic head installing plate 9 and magnetic head back-moving spring 12 just constitute to the 1st, the

2nd hypodontia gear

23,24,24a is in the position on transmission gear 20 revolution orbits and applies the 1st actuating mechanism of recuperability.On the 3rd hypodontia gear 25 and below be respectively equipped with the 1st cam 35 and the 2nd cam 36.The 1st cam 35 comprises: keep equidistant arc sections 35a with rotary middle spindle 28; One end is connected with the end of arc sections 35a, the other end is to the 1st rake 35b of rotation center lopsidedness; One end is connected with the other end of the 1st rake 35b, the other end is to the 2nd rake 35c of despining center lopsidedness; One end is connected with the 2nd rake 35c, the other end with during the 2nd rake 35c becomes axisymmetrically towards the 3rd rake 35d of rotation center lopsidedness; The other end of the 3rd rake 35d communicate with the other end of arc sections 35a, with axisymmetric the 4th rake 35e during the 1st rake 35b becomes.The 1st cam 35 is with the V font zigzag part 37a sliding joint of retarding spring 37 1 ends that are made of bar-spring.In the spring suspension portion (omitting among the figure) that annulus 37b on the retarding spring 37 cardinal principle middle parts and other end 37c are hung in substrate 1.Because retarding spring 37 is restricted the position of rotation of the 3rd hypodontia gear 25.Have on the 2nd cam 36 of the 3rd hypodontia gear 25: the isocentric circular arc portion 36a concentric with rotary middle spindle, give prominence on the some of outer peripheral face semi-triangular bulge 36b be set.What is the rotation in company with the 3rd hypodontia gear 25, because the bulge 36b of the 2nd cam 36 is pressed on the movable contact pin 38a of the motor shutdown switch 38 that the open type switch forms, it is contacted with fixed tabs 38b, cause the motor shutdown switch that is installed in below the substrate 1 to become on-state.In addition, have only when motor shutdown switch 38 is connected and operated shut-down operation key (omitting among the figure) simultaneously, motor 2 just stops operating.Thereby during inoperation shut-down operation key, even motor shutdown switch 38 is in on-state, motor 2 does not stop operating yet.Circuit is to constitute like this.

The action of blattnerphone that the sequential control mechanism of above-mentioned employing gear mechanism just is housed below illustrates with Fig. 3 to Figure 17.

(playback action)

Under halted state illustrated in figures 1 and 2, operation playback operation key (omitting among the figure), operation signal makes motor 2 rotate by the clockwise direction among the figure (positive dirction) constant speed.Because the rotation of motor 2, by motor belt dish 6 and non junction endless-belt 8, make the rotation in the direction of the clock integratedly each other of flywheel 7, driven wheel 18 and capstan 5, transmission gear 20 rotates counter clockwise simultaneously, and it is the rotating in the direction of the clock state in center that revoliving arm 19 is in capstan 5.But this moment since the center off normal of transmission gear 20 in the gyratory directions rear side (right side among the figure) of the tie line at the center of the center of driven wheel 18 and the 3rd hypodontia gear 25, as shown in figure 16, dock at the bottom of the tooth of the tooth top of transmission gear 20 and the 3rd hypodontia gear 25a, so revoliving arm 19 revolution is in the direction of the clock stoped.In this state, the 3rd hypodontia gear 25 since driven wheel 18 by the driving of transmission gear 20 rotate in the direction of the clock decide angle.In company with the rotation of the 3rd hypodontia gear 25, the bulge 36b of the 2nd cam 36 leaves from the movable contact pin 38a of motor shutdown switch 38, and what is that movable contact pin 38a leaves from fixed tabs 38b, and motor shutdown switch 38 just is in off-state.In addition, in company with the rotation of the 3rd hypodontia gear 25, when its anodontia 25b met with transmission gear 20, owing to transmission gear 20 and the 3rd hypodontia gear 25 leave, revoliving arm 19 turned round in the direction of the clock.At this moment, i.e. the 3rd hypodontia gear 25 rotations arrive in the terminal location, because the zigzag part 37a of retarding spring 37 and the 2nd rake 35c sliding joint of the 1st cam 35, the 3rd hypodontia gear 25 reverses a little counter clockwise, the 1st tortuous recess 35f between zigzag part 37a and the 1st rake 35b and the 2nd rake 35c is in engagement state and static, revoliving arm 19 counter clockwise during reversed turning the tooth portion that has of transmission gear 20 and the 3rd hypodontia gear 25 can access slick and sly certain engagement.Transmission gear 20 leaves from the 3rd hypodontia gear 25, and with the 1st hypodontia gear 23 the 23a of tooth portion engagement arranged, revoliving arm 19 is turned round in the direction of the clock, but this moment, because the center off normal of transmission gear 20 is in the gyratory directions rear side (right side among the figure) of the tie line at the center of the center of driven wheel 18 and the 1st hypodontia gear 23, dock at the bottom of the tooth that the 23a of tooth portion is arranged of the tooth top of transmission gear 20 and the 1st hypodontia gear 23, so revoliving arm 19 revolution in the direction of the clock is subjected to stoping (state of Fig. 3).Under such state, because driven wheel 18 passes through the driving of transmission gear 20, the 1st hypodontia gear 23 angles that rotation is decided.Rotation in company with the 1st hypodontia gear 23, a side cam follower pin 31 that engages with the 1st arc sections and the tortuous recess 29f between the 3rd rake 29e of cam 29 always, in turn with the 1st, the 2nd arc sections 29a of

cam

29,29b and the 1st rake 29c sliding joint, what is by cam follower pin 31, magnetic head installing plate 9 overcomes the acting force of magnetic head back-moving spring 12, moves along the arrow A direction from stop position.When it arrived portable terminal, anodontia 23b of the 1st hypodontia gear 23 ran into transmission gear 20, simultaneously the 1st rake 29c sliding joint (state of Fig. 4) of the cam 29 of the cam follower pin 31 of a side and the 1st hypodontia gear 23 one.Move on the terminal location of arrival along the arrow A direction at magnetic head installing plate 9 shown in Figure 4, because magnetic head back-moving spring 12 applies acting force to magnetic head installing plate 9 on the arrow B direction, and the 1st rake 29c sliding joint of the cam 29 of the cam follower pin 31 of a side and the 1st hypodontia gear 23 one, the 1st hypodontia gear 23 reverses a little to counter-clockwise direction, the 2nd tortuous recess 29g between the 2nd arc sections 29b of the cam follower pin 31 of one side and cam 29 and the 1st rake 29c is in engagement state and static, and the 23a of tooth portion that has of transmission gear 20 and the 1st hypodontia gear 23 can access slick and sly engagement when revoliving arm 19 reverses counter clockwise.In addition, in company with the 1st hypodontia gear 23 reverse counter clockwise a little, the cam follower pin 31 of a side engages with the 2nd tortuous recess 29g of cam 29, under the acting force of magnetic head back-moving spring 12, magnetic head installing plate 9 returns a little from the state of Fig. 4 to the arrow B direction, so stably remain on the playback operating position.In addition, when magnetic head installing plate 9 arrived the playback operating positions, pinch roller 15 was by interior tape of tape cassete (omitting among the figure) and capstan 5 crimping, recorded simultaneously, playback head 10 and contact with tape.And when anodontia 23b of the 1st hypodontia gear 23 meets transmission gear 20, because transmission gear 20 and the 1st hypodontia gear 23 leave, revoliving arm 19 moves in the direction of the clock, the fragment 19a of one side docks with an end 22a of stop block 22, its clockwise maximum rotary position is restricted, at this moment transmission gear 20 meshes with the take-up reel gear 3a of take-up reel 3, what is that take-up reel 3 rotates in the direction of the clock, and tape is gone on the take-up reel 3 and carried out playback action (state of Fig. 5) from supply reel 4 low speed.The maximum rotary position of the clockwise direction of revoliving arm 19 is, with transmission gear 20 and the take-up reel gear 3a position engaged on pitch circle that has the take-up reel 3 of slide mechanism (omitting among the figure).In addition, when magnetic head installing plate 9 moved on to the playback operating position, the position of magnetic head installing plate 9 was detected by position detecting switch (omitting among the figure), and sends magnetic head installing plate 9 signal on the playback operating position.

(F.F. action)

Under halted state illustrated in figures 1 and 2, operation forwarding operation key (omitting among the figure), under this operation signal, motor 2 rotates in the direction of the clock, is identical until transmission gear 20 moves with situation till the take-up reel gear 3a of take-up reel 3 is meshed and above-mentioned playback.But the signal that signal, magnetic head installing plate 9 that operation forwarding operation key is sent have been moved on the playback operating position, sent by position detecting switch etc. detects, according to the signal that detects the circuit for reversing (omitting among the figure) of motor 2 is moved, motor 2 is (in the other direction) rotation counter clockwise.Meanwhile, also revolution counter clockwise of revoliving arm 19.And the 23a of tooth portion that has of transmission gear that rotates in the direction of the clock and the 1st hypodontia gear 23 meshes.But this moment since the center off normal of transmission gear 20 in the gyratory directions rear side (left side among the figure) of the tie line at the center of the center of driven wheel 18 and the 1st hypodontia gear 23, dock at the bottom of the tooth that the 23a of tooth portion is arranged of the tooth top of transmission gear 20 and the 1st hypodontia gear 23, revoliving arm 19 turns round counter clockwise and is subjected to stoping (state of Fig. 6).Under such state, by the driving of driven wheel 18 by transmission gear 20, the 1st hypodontia gear 23 rotates counter clockwise.Because the rotation of the 1st hypodontia gear 23, the cam follower pin 31 of a side and the 2nd arc sections 29b sliding joint of cam 29, and magnetic head installing plate 9 since the acting force of magnetic head back-moving spring 12 move along the arrow B direction.When the 2nd arc sections 29b of the cam follower pin 31 of a side and cam 29 and the 3rd tortuous recess 29h between the 1st arc sections 29a engage, magnetic head installing plate 9 arrives initial stop position, 15 of pinch rollers leave from capstan 5, and recording, playback head 10 also leave (state of Fig. 7) from tape.Get back to stop position in company with magnetic head installing plate 9, the signal that sends from position detecting switch stops at this point.Owing to send stopping of signal, the input of the counter-rotating command signal of above-mentioned motor circuit for reversing also just stops, motor 2 is rotation in the direction of the clock once more, revoliving arm 19 is revolution in the direction of the clock also, transmission gear 20 meshes with the take-up reel gear 3a of take-up reel 3, take-up reel 3 is rotated in the direction of the clock, and tape is transported at a high speed on the take-up reel 3 and realizes F.F. action (state of Fig. 3) from supply reel 4.

(high speed erasure action)

Under halted state illustrated in figures 1 and 2, operation high speed erasure operating key, its operation signal makes the circuit for reversing action of motor, thus motor 2 constant speed rotation counter clockwise.Because the rotation of motor 2, motor belt dish 6 is by non junction endless-belt 8 and flywheel 7, driven wheel 18 and capstan 5 rotation counter clockwise integratedly each other respectively, transmission gear 20 rotates in the direction of the clock simultaneously, and it is the gesture that the center is turned round counter clockwise that revoliving arm 19 also has with capstan 5.This moment, revoliving arm 19 can turn round counter clockwise because transmission gear 20 leaves from the 3rd hypodontia gear 25.Transmission gear 20 meshes from the 24a of tooth portion that has that the 3rd hypodontia gear 25 leaves back and the 2nd hypodontia gear 24, makes revoliving arm 19 have the gesture of revolution counter clockwise simultaneously.But this moment since the center off normal of transmission gear 20 in the gyratory directions rear side (left side among the figure) of the tie line at the center of the center of driven wheel 18 and the 2nd hypodontia gear 24, dock at the bottom of the tooth that the 24a of tooth portion is arranged of the tooth top of transmission gear 20 and the 2nd hypodontia gear 24, make revoliving arm 19 revolution counter clockwise be subjected to stoping (state of Fig. 9).Under such state because driven wheel 18 is by the driving of transmission gear 20, the 2nd hypodontia gear 24 rotate counter clockwise decide angle.Because the rotation of the 2nd hypodontia gear 24, the cam follower pin 32 of the opposite side that engages with the 1st arc sections 30a and the 1st tortuous recess 30f between the 2nd arc sections 30b of cam 30 always, in turn with the 2nd arc sections 30b and the 1st rake 30c sliding joint of cam 30, what is by cam follower pin 32, and the acting force that magnetic head installing plate 9 overcomes magnetic head back-moving spring 12 moves to the arrow A direction from stop position.When it moved to terminal, anodontia 24b of the 2nd hypodontia gear 24 met transmission gear 20, simultaneously the cam follower pin 32 of opposite side and the 1st rake 30c sliding joint (state of Figure 10) of the 2nd hypodontia gear 24.Magnetic head installing plate 9 shown in Figure 10 moves on the terminal location along the arrow A direction, the acting force that applies in the arrow B direction by 12 pairs of magnetic head installing plates 9 of magnetic head back-moving spring, the 1st rake 30c sliding joint of the cam 30 of one on the cam follower pin 32 of opposite side and the 2nd hypodontia gear 24, the 2nd hypodontia gear 24 reverses a little in the direction of the clock, the 2nd tortuous recess 30g between the 2nd arc sections 30b of the cam follower pin 32 of opposite side and cam 30 and the 1st rake 30c is in engagement state and is static, in the direction of the clock behind the reversed turning, the 24a of tooth portion that has of transmission gear 20 and the 2nd hypodontia gear 24 can access slick and sly engagement at revoliving arm 19.In addition, the 2nd hypodontia gear 24 reverses a little in the direction of the clock, in company with engaging of the 1st tortuous recess 30f of the cam follower pin 32 of opposite side and cam 30, under the acting force of magnetic head back-moving spring 12, magnetic head installing plate 9 returns a little from the state of Figure 10 to the arrow B direction, shown in the erasure operating position stably kept.Amount of movement from the stop position of magnetic head installing plate 9 to the erasure operating position, smaller slightly than amount of movement from stop position to the playback operating position.Thereby when magnetic head installing plate 9 arrives the erasure operating position, pinch roller 15 leaves from capstan 5 a little, recording simultaneously, playback head 10 leaves from tape a little, and eraser 11 is in the state (state of Figure 10) with contact with tape.In addition, anodontia 24b of the 2nd hypodontia gear 24 meets transmission gear 20, because transmission gear 20 leaves from the 2nd hypodontia gear 24, revoliving arm 19 rotates counter clockwise, the fragment 19b of opposite side docks with the other end 22b of stop block 22, so just limited maximum rotary position counter clockwise, at this moment transmission gear 20 meshes with the supply reel gear 4a of supply reel 4, supply reel 4 rotates counter clockwise, tape is delivered at a high speed on the supply reel 4 and is carried out erasure from take-up reel 3, and what is to realize high speed erasure action (state of Figure 11).

(rewinding action)

Under halted state illustrated in figures 1 and 2, operation rewinding operating key (omitting among the figure), motor rotates counter clockwise under its operation signal, is identical until transmission gear 20 moves with situation till the supply reel gear 4a of supply reel 4 is meshed and above-mentioned high speed erasure.

But the signal that signal, magnetic head installing plate 9 have moved on the high speed erasure operating position, position detecting switch sent that operation rewinding operating key is sent etc. detects, under detection signal, the counter-rotating command signal of importing to the circuit for reversing of motor 2 stops at this point, motor 2 rotates in the direction of the clock, revoliving arm 19 is revolution in the direction of the clock also, the 24a of tooth portion that has of transmission gear 20 and the 2nd hypodontia gear 24 meshes, and makes revoliving arm 19 have the gesture of revolution in the direction of the clock simultaneously.But this moment since the center off normal of transmission gear 20 in the gyratory directions rear side (right side among the figure) of the tie line at the center of the center of driven wheel 18 and the 2nd hypodontia gear 24, dock at the bottom of the tooth that the 24a of tooth portion is arranged of the tooth top of transmission gear 20 and the 2nd hypodontia gear 24, revoliving arm 19 revolution in the direction of the clock is subjected to stoping (state of Figure 12).Under such state, because driven wheel 18 passes through the driving of transmission gear 20, the 2nd hypodontia gear 24 rotates in the direction of the clock.Since the rotation of the 2nd hypodontia gear 24, the cam follower pin 32 of opposite side and the 2nd arc surface 30b sliding joint of cam 30, and the acting force that magnetic head installing plate 9 overcomes magnetic head back-moving spring 12 moves to the arrow B direction.What is, the cam follower pin 32 of opposite side engages with the 2nd arc surface 30b of cam 30 and the 1st tortuous recess 30f between the 1st arc surface 30a, magnetic head installing plate 9 arrives initial stop position, pinch roller 15 leaves from capstan 5, and recording, playback head 10 and eraser 11 leave (state of Figure 13) from tape simultaneously.Be returned to stop position in company with magnetic head installing plate 9, because the signal that position detecting switch sends makes the circuit for reversing action of motor 2, motor 2 rotates counter clockwise.Also revolution counter clockwise of revoliving arm 19 meanwhile, the transmission gear 20 of rotation meshes with the supply reel gear 4a of supply reel 4 in the direction of the clock, supply reel 4 is rotated counter clockwise, tape is delivered on the supply reel 4 at a high speed from take-up reel 3, and what is to realize rewinding action (state of Figure 14).

(transferring halted state to) from the playback operating state

Under playback operating state shown in Figure 5, operation shut-down operation key (omitting among the figure), because its operation signal makes the circuit for reversing action of motor 2, motor 2 rotates counter clockwise.Because the rotation of motor 2, revoliving arm 19 turns round counter clockwise, the 23a of tooth portion that has of transmission gear 20 and the 1st hypodontia gear 23 meshes, the 1st hypodontia gear 23 rotates in the direction of the clock, state through Fig. 6 and Fig. 7, as shown in figure 15, the 25a of tooth portion that has of transmission gear 20 and the 3rd hypodontia gear 25 meshes.Therefore the 3rd hypodontia gear 25 rotates counter clockwise, because the bulge 36b of the 2nd cam 36 is pressed on the movable contact pin 38a of shutdown switch 38, movable contact pin 38a is contacted with fixed tabs 38b, thereby shutdown switch 38 is in on-state.At this moment, owing to above-mentioned shut-down operation key was operated already, the operation signal that the shut-down operation key sends, and the connection signal of shutdown switch 38, the both sets up, thereby makes the dump of motor 2, and motor 2 stops the rotation, and becomes halted state shown in Figure 2.

Figure 17 regularly reaches the recording relevant with each operating state, the relation table diagrammatic sketch of playback head position for the counter-rotating of the sense of rotation of the motor 2 relevant with each action transition status, dotted line among the figure is represented stopping of motor 2, represent being rotated in the forward of motor 2 (among the figure in the direction of the clock rotation) at the solid line of this dotted line upside, the solid line of dotted line downside is then represented the reverse rotation (among the figure counter clockwise rotation) of motor 2.

The application of the utility model aspect tape recorder has been described in the above-described embodiments, however its application be not limited in this respect, for example, the motor driver that camera rewinds and the device such as shutter links to move; Make tape be crimped on mechanism on the capstan after the video recorder device is complete; Control for another example the mechanism that a plurality of electromagnet make a plurality of operating members link in turn and move, and other various uses, the utility model all can be used.

Claims

1, a kind of sequential control mechanism that adopts gear mechanism, this mechanism has following feature structure:

Driven wheel--by the motor-driven of positive and negative rotation;

Revoliving arm--be located on the same axle with driven wheel;

Transmission gear--be bearing on this revoliving arm with axle, and link with above-mentioned driven wheel;

The hypodontia gear--having has tooth portion and anodontia portion, stops the revolution action of transmission gear when having tooth portion and transmission gear to mesh with the tooth bottom surface, then allows to revolve round the sun to move for anodontia and carries out;

The 1st actuating mechanism--with the interlock of hypodontia gear, be on the revolution orbit of transmission gear for the tooth portion that has that makes the hypodontia gear simultaneously, the hypodontia gear is applied recuperability;

The 2nd actuating mechanism--when above-mentioned transmission gear anodontia by above-mentioned hypodontia gear, drive by above-mentioned driven wheel with the transmission gear engagement;

Cam and cam follower pin--the either side in above-mentioned hypodontia gear and above-mentioned the 1st actuating mechanism is provided with cam, and at the cam follower pin of opposite side setting and this cam engagement.