DE3234193A1 - Reverse drive of an audio tape apparatus - Google Patents

Abstract

In a reverse drive, a lever reversing gear mechanism with two levers between the slides of two fast-running buttons and a lever bearing a fast-running wheel can be switched over by actuating a reserve slide in such a way that fast forwarding and fast rewind are functionally assigned correctly to the respective fast-running buttons in the case of both tape running directions.

Description

Reversal of a tape recorder

The invention relates to a reversing drive according to the preamble of claim 1.

Reversing drives in tape recorders for so-called reverse or auto-reverse operation allow by switching the direction of travel between achaparallel tape reels circumferential end of the tape a reversal of one of the one running direction assigned Tape track on a tape track assigned to the opposite direction of travel.

The direction of travel can be switched by pressing a button so-called reverse slide at any Position of the tape triggered are and takes place automatically at the end of the line during auto reverse operation.

Such tape recorders include in the form of so-called cassette decks as heating devices or known as built-in drives in combined car radio cassette devices.

One problem is when the existing key slide is actuated for fast forward or rewind to ensure that the fast running of the tape corresponds to the set direction of travel, d. H. that an operation of the Forward key always fast forward regardless of the set direction in the respective playback direction and always pressing the return button triggers fast reverse in the opposite direction.

In a known reverse drive, the fast is on via a clutch switched on, by pressing a quick-release button on an electronic circuit at the beginning and at the end of the high-speed operation a reverse magnet is actuated in order to to achieve the desired assignment to the running direction.

The invention is based on the problem identified easy and inexpensive to solve with purely mechanical means to the device electronics to simplify and reduce the effort involved.

This object is achieved by the invention specified in claim 1.

Refinements and developments of the invention are set out in the subclaims specified.

The main feature of a drive according to the invention is a lever reversing gear, which is a functionally correct one for the respective Allocation of forward and rewind to the corresponding playback direction Quick buttons or their slider guaranteed.

The gear change according to the invention is at different Tusführungformen of the invention at least one pivotably mounted fog of the reversing gear with the reverse slide in its actuation direction or on one height-adjustable bearing axis that is fixed in relation to the reverse slide.

The space requirement of the purely mechanically operated by the ieverse slide switchable lever reversing gear of the invention is low. One of the known solutions The existing reverse magnet and the associated circuit electronics are not required.

The invention can due to the space-saving design of the lever reversing gear can also be used in compact devices with small dimensions.

The simple mechanical construction of the lever mechanism according to the invention ensures trouble-free, reliable operation even in built-in car devices.

Further advantages and features of the invention emerge from the following Description and the drawing of two partially shown schematically simplified Embodiments of the invention. It shows: Sig. 1 to 3 broken out diagrammatic Partial views of a reversal mechanism according to the invention with the for understanding essential to the invention Share a first embodiment a lever reversing gear in three different operating or actuating positions, 4 and 5 are broken away, partially sectioned views rotated by 90 ° of a reverse drive according to the invention with the essential parts of a second Execution of a lever reversing gear in a first operating position and Fig. 6 and 7 of Fig. 4 and 5 corresponding drive views in a second Operating position of the lever reversing gear.

The perspective sketched in Fig. 1 to 3 detail of a reversal # Aufwerkes with push-button actuation, which is common per se, shows in each case by separate buttons Operable sliders 10 and 12 for fast forward and reverse and a reverse slider 14 for switching the tape running direction of the drive. The direction of movement at a key actuation according to the drawing can be displaced essentially in parallel The slide 10, 12 and 14 guided in the drive chassis is indicated by an arrow 16. Guides of the slide in the drive as well as reset and locking devices for fixing the actuated and non-actuated slide settings are slide settings not shown for the sake of simplicity, because these are elements per se known design and arrangement.

The preferably mirror-symmetrical designed and arranged Sliders 10 and 12 have overlapping wider slider sections at the front end 18 and 20 formed, in the direction of actuation obliquely to the front outward Control edges 22 and 24, which overlap in the starting position shown in FIG. 1. From the outside lying n front ends of the control edges 22, 24 the slide sections arranged to slide directly on top of one another in the embodiment shown 18 and 20 extend equally long, with a lateral distance parallel opposite one another narrower end sections 26 and 28, which terminate in front end strokes 30 and 32, respectively.

At 34 there is an angled, for example, also called a quick release lever designated lever 36 below the high-speed fog 10, 12 in a parallel to these Pivotable level. The pivot lever 36 carries one at the end of its one arm rotatably mounted about an axle shaft 38 via Eupplwngsmittel (not shown) from a drive motor drivable or driven high-speed wheel 40. At the end of his others, in the space below the space between the narrow end sections 26, 28 of the Sshnellaufschieber 10, 12 extending arm, the lever 36 carries a upwardly projecting stop or actuating pin 42 for pivoting the Lever 36 bus its fixed by a centering or return spring, not shown Starting position according to FIG. 1.

Xern of the invention is a lever reversing gear with a first lever 44 and a second lever 46 for the switchable coupling of the slide 10, 12 of the Buttons for fast forward and reverse with the swivel lever carrying the high-speed wheel 40 36.

In the embodiment shown, the first lever 44 is on a below the level of the test slide 10 and 12 in the space between the slide ends 26, 28 extending arm 48 of the reverse slide 14 to one between the narrow Slide end sections 26, 28 projecting axle shaft 50 pivotable and is called the actual Reversing lever when the reverse slide 14 is actuated to switch the drive taken away.

The pivotable about a shaft 52 on the lever 36 or the chassis mounted second lever 46 is as an intermediate lever for pivoting the Schnellaufhebeis 36 only in one of the two possible positions of the reverse slide 14 with the first nebula 44 coupled.

Like the quick-action lever 36, the two levers 44 and 46 of the llebel- # end gear with normal, not shown return or Centering springs to ensure that levers 36, 44 and 46 at inactive er # us # angsstellung the high-speed pushbuttons 10 and 12 automatically are pivoted into their central position shown in FIG. The first gear lever 44 is also located during its made by actuating the reverse slide 14 Shift in position in this central starting pivot position.

The preferably equal-armed first lever 44 of the reverse gear is located substantially at the level of the plane of the key slide 10, 12 and has at the end his one, to the control slopes 22, 24 of the slide 10, 12 pointing arm one perpendicular to the slide plane force on handle or stop surface 54 and at the opposite end of his other arm pointing to the second lever 46 correspondingly arranged force application surface 56.

Furthermore, the lever 44 carries its heat at the opposite ends lying in a plane parallel below the plane of the key slide 10, 12, U-shaped claws 58 and claws 58 or 60 for reciprocal coupling engagement with the upper end portion of the dated underlying Schnelllaufhebeis 36 protruding actuation pin 42 in the opposite switching positions of the entrained when the reverse slide 14 is actuated Lever 44.

The second lever 46 of the reversing drive is also preferably similar sus formed and has one at the bearing point 52 between its essentially transverse to the longitudinal direction of the lever 44 or to the direction of key actuation 16 Lever arms 62, 64 preferably at right angles to the lever 44 branching actuator 66, whose free round with a bordered by side wall sections, in substantially U-shaped claw 68 is formed. The height reduction and location the claw 68 is for example: by appropriate training and arrangement of the Actuating arm 66 chosen so that a clutch engagement of the claw, which will be explained below 68 and the opposite Kwtplungsfläche 56 of the first lever 44 in each case trouble-free above the coupling claw seated at this end of the lever 44 60 takes place. The following functional explanation is based on that shown in FIG Starting position assumed that due to the existing resetting or centering devices the lever and slide shown is occupied when neither a quick-action button To operate the slide 10 or 12, press the reverse button to operate the Slide 14 is pressed.

In this starting position, the slides 10, 12 and 14 are in their retracted position opposite to the actuation direction 16 and the first Lever 44 of the lever reversing gear is with the actuating arm 66 or its claw 68 aligned. The high-speed wheel 40 mounted on the high-speed lever 36 is located in an intermediate position out of engagement between the in the pivoting direction opposite sides of the Schnellaufrades 40 arranged axially parallel to this Winding plates of the drive.

The claw 60 at the end of the arm facing the second lever 46 of the The first lever 44 is in coupling engagement with the actuating pin with lateral play 42, while the preferably pin-shaped or rounded stop surface 54 at the opposite end of the other arm of lever 44 in the position of the reverse slide 14 shown here in the movement path of the control slopes 22, 24 of the key slide 10, 12 is located.

If, for example, the slide 12 is now associated by pressing the Rapid button moved in the direction of arrow 16 into its position shown in Fig. 2, the reversing lever 44 is caused by the contact surface 54 at the end Control slope 24 of the actuated slide 12 pivoted, the claw 60 on the other end of the lever 44 takes the actuating pin 42 with it and thus by pivoting it of the quick release lever 36, the speed wheel 40 mounted thereon, for. B. for fast Forward in the attack direction with the winding plate reached in this pivoting direction of the drive brings. The sequence of movements explained above is shown in FIG Arrows indicated.

That when the button 12 is actuated as explained here by its end stop 32 also the lever 46 is pivoted, has in this working position of the reverse slide 14 and thus the first lever 44 has no effect on the drive function.

Is now used by pressing the reverse button to switch the 3-way direction the reverse slide 14 from the working position shown in FIG. 1 into the position shown in FIG. 3 If the working position shown is adjusted, the reversing lever carried along by the reverse slide arrives 44 with its preferably also pin-shaped rounded force application surface 56 in coupling engagement with the claw 68 of the actuating arm 66 of the second lever 46. At the same time, there is clutch engagement between the pawl 60 and the actuating pin 42 of the quick release lever 36 canceled and instead a clutch engagement between the claw 58 sitting at the other lever end and the actuating pin 42 produced.

The force application point 54 at the end of the lever carrying the claw 58 is in this working position of the lever 44 outside the range of motion of the inclined control edges 22, 24 of the slide 10, 12.

fine actuation of the slide 12 by pressing the associated quick-release button thus acts in this switching position of the reverse slide 14 and the reversing lever 44 not on the attack puakt 54 of the first lever 44, which is now over the through the stop 32 of the slide end portion 28 pivoted second lever 46 pivoted and thereby the high-speed lever 36 with the high-speed wheel 40 in that of FIG. 2 opposite pivoting direction moved and the Schnellufrad 40 in driving engagement with the other changing plate. This means that the desired functionally correct one Allocation of the fast reached and it is with the key 12 according to the The direction of travel that has now been set is switched on again, fast forward. Even In Fig. 3, the pivoting movements triggered by actuation of the key slide 12 are the lever involved in switching indicated by arrows.

The functional sequence when pressing the other key slide 10 corresponds to the sequence of operations explained for key 12, but with the high-speed wheel 40 is pivoted in the opposite direction in order to be in both switching positions the reverse slide 14 z. B. turn on fast rewind.

Another embodiment shown in detail in FIGS. 4 to 7 another key-operated reverse drive also has two key sliders 100, 102 for fast forward and reverse and a Heverse slide 104 for switching the direction of travel of the tape.

The slides 100, 102 arranged one above the other in parallel planes and 104 are guided in the Lsufwerkchessis so that they can be moved in parallel.

Those along one side of the reverse slide 104 directly on top of one another Slidably arranged slides 100 and 102 are for the sake of clarity in Fig. 4 and 6 only indicated by their planes of movement. A minor one Laterally offset arrangement of the slides 100 and 102 would be possible, but serves in Figs. 5 and 7 mainly for clarity of illustration.

The sliders 100 and 102 have the Beverse slider 104 on them adjacent side equally spaced in the longitudinal direction of the slide, in Direction of actuation pointing control edges 106 and 108 or 110 and 112, the z. B. each formed by a delimiting edge of a lateral slider cutout are.

At 114, a generally T-shaped quick release lever 116 is on the side of the reverse slider opposite the rapid sliders 100 and 102 mounted pivotably in a plane perpendicular to the slide plane.

The pivot lever 116 carries one at the free end of its middle arm at 118 rotatably mounted, mostly by means of a shaft rotating mass of a drive motor Drivable Schnellaufrad 120, the center position shown between 2 axially parallel for this purpose arranged winding plates by a not shown back-up spring of the quick release lever 116 is set.

The two side arms of the quick release are in the middle position shown aligned essentially parallel to the direction of actuation of the slide 100 to 104 and at their free ends i have the same angle to the direction of key actuation inclined, parallel control slopes 122 and 124, respectively.

The Bebel reversing gear, which forms the core of the invention, also has here a first lever 126 and a second lever 128, which in this embodiment designed identically and the reverse slide 104 at a distance in its longitudinal direction are assigned in the same way. The nebulas 126 and 128, which are executed with the same arms are each pivotably mounted on an axle shaft 130 and 132 and against the Height adjustable by means of a preload spring 134 or 136.

The vertically rising from an Ohassispiatte 138 of the drive Bearing shafts 130, 132 also serve as fixed guide pins for the # Switching movement of the reverse slide, which is slidably adjustable on the chassis plate 138 104, which for this purpose, as shown, is consecutive in its longitudinal direction Has elongated holes 140, 142.

The levers 126 and 128 are each on the through the elongated holes 140 or 142 over the reverse slide 104 protruding shaft sections of the bearing or guide pins 130 and 132 and supported by a locking ring 144 or 146 at the upper end of the shaft supported prestressing spring 13 or 136 downwards against the reverse slide 104 and the chassis plate 138 is insufsehlgend.

Between the reverse slide 104 and the respective lever 126, 128 an annular washer 148 or

150 must be inserted.

An intermediate ring 152 or 154 can be used for centering the, preferably from a, the respective bearing shaft concentrically comprehensive helical spring 134 or 136 existing biasing spring if necessary one protruding upwards into the lower end of the spring Centering shoulder 156 or 158 wear.

The parts 148, 152, 156 or 150, 154, 158 can in a modified Design Components of one-piece, stepped bearing or guide bushes for the levers seated firmly on the continuous central sections 152 and 154, respectively 126 and 128 respectively.

Qls control element for the alternate height adjustment of the two reversing levers 126 and 128, the reverse slide 104 has a cam track on its upper side with one raised over run-up bevels a or b in relation to the longitudinal ends of the slide, cam surface extending parallel to the slide plane or to the chassis plate 138 c. This cam track is advantageous simply by the top of one opposite the plane of the longitudinal ends of the slider, bent-up central section of the reverse slider 104 formed.

The levers 126 and 128 of the reverse gear are substantially transverse arranged to the slide longitudinal direction so that their on opposite sides of the Reverse slide 104 protruding arms on the one hand depending on the height position of the respective Lever alternately in the movement path of one of the control edges 106 or 110 or 108 or 112 and on the other hand regardless of their respective setting height of the respectively associated control slope 122 and 124 of the opposite control arms of the quick release lever 116 are assigned as actuators.

4 and 5 show the reverse slide 104 in its in the drawing working position shifted to the right, in which the through an arrow A indicated tape travel direction is switched on. The first reversing lever 126 is in its lowered position so that one lever arm the control stop 106 of the rapid slide 100 and the opposite lever poor the control slope 122 of the quick release lever 116 is assigned. The second reversing lever 128 is raised by means of the control cam c of the reverse slide 104, so that the opposite lever arms of the control edge 112 of the high-speed slide 102 or the control slope 124 of the high-speed lever 116 are assigned.

When the test slider 100 is operated in the direction of the arrow I the control edge 106 meets an arm of the return lifter 126 and pivots the latter in the direction also indicated by arrows I. The one with this lever swing the arm hitting the control slope 122 now pivots the rapid-action lever 116 and thus brings the roller wheel 120 out of its centered central position to the right in the direction again indicated by an arrow I in drive engagement with the changing plate adjacent there.

This means that the playback direction A is fast forward switched on. The slide 100 of the drive shown therefore belongs to the forward key, and consequently the slide 102 to the return key.

Is now in the initial position of the drive shown in Fig. N and 5 the slide 102 is actuated by pressing the return button. hits its control edge 112 on a lever arm of the second reversing lever 128, whose then on the control slope 124 hitting lever arm the high-speed lever 116 and thus the high-speed wheel 120 now swiveled to the left to the winding plate next to it on this side.

This means that, in relation to playback direction A, there is now faster rewind switched on. The switch-on movements described above for fast reverse are indicated in the drawing by arrows II.

6 and 7 now show the drive after switching to the through an arrow B indicated tape travel direction Reproduction. Of the Reverse slide 104 is now in its position, which has been moved to the left as shown in the drawing Switching position in which the first lever 126 of the lever reversing gear is in its by means of the control cam c of the reverse slide 104 raised position in the actuation path of the return slide 102, while the second lever 128 is now lowered and is in the path of the feed slide 100.

In this drive position, the high-speed wheel 120 is actuated the forward key via the slide 100, the second reversing lever 128 and the control slope 124 of the high-speed lever 116 pivoted with this to the left, so that the tape running direction B is assigned to fast forward again. The sequence of movements at Turning on fast forward in this circuit is as in Figs. 4 and 5 again indicated by arrows I.

If the return button is pressed in the switching position of FIGS. 6 and 7, the high-speed wheel 120 via the control edge 110 of the slide 102, the lever 126 and the control slope 122 of the quick release lever 116 according to the drawing to the right panned. The movements of those involved in turning on fast reverse Drive parts are again indicated by arrows II in accordance with FIGS. 4 and 5.

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Claims (17)

Claims S reversible drive eints tape recorder, in particular one button-operated tape cassette player with one for switching the direction of travel between two switching positions adjustable reverse slide and with a corresponding the respective running direction of the running between two axially parallel winding discs Belt driven, on a: Swing lever mounted high-speed wheel, which means separate test enscn liver for quick pre- or. HùcklauS from a parallel position is alternately pivotable in drive engagement with one of the two winding plates, characterized in that a two lever (+4, 46; 126, 128) having lever reversing gear between the slides (10, 12; 100, 102) of the high-speed keys and the high-speed wheel (40; 120) supporting pivot lever (36; 116) by actuating the reverse slide (14; 104) can be switched over in such a way that forward and backward run the corresponding quick buttons are functionally assigned for both tape directions of the drive. 2. Drive according to claim 1, characterized in that the lever reversing gear one with the reverse slide (14) displaceable, pivotably mounted first Lever (44) and a second lever pivotably mounted in the drive, wherein the bearing axles (50, 52) of the two levers in the button actuation direction (16) with Distance one behind the other that the first lever is in opposite positions turn the reverse slider alternately with one of its opposite sides (58, 60) engages on an arm (42) of the pivot lever (36), the other arm of which is the high-speed wheel (40) carries, while the one facing the second lever is in the direction of key actuation with one arm of the second lever aligned first lever only in one position of Reverse slide is coupled to the second lever, and that each operated Schnellaufachieber (10, 12) in the uncoupled position of the two levers with a control edge (22, 24) on one of the second lever lying attack surface (54) of the first lever engages and coupled in it Position of the two levers via one of the one in front of the actuating direction Control edge (22, 24) lying end stop (30, 32) actable transverse arms (62, 64) and one branching off between the arms with a handle surface (56) of the first lever coupled arm (66, 68) engages the first lever. 3. Drive according to claim 1 or 2, characterized by an equal arm first lever (44). 4. Drive according to one of claims 1 - 3, characterized in that that the second lever with the same arms (62, 64) lying transversely to the first lever and an arm (66) which branches off between these and is aligned with the first lever with an end coupling claw (68) essentially having a door shape. 5. Drive according to one of the preceding claims, characterized in that that the second lever (46) in the drive chassis or on the high-speed wheel (40) bearing pivot lever (36) is mounted. 6. Drive according to one or more of the preceding claims, characterized in that the high-speed lever (36) is an angle lever. 7. Drive according to one or more of the preceding claims, characterized in that the first lever (44) on a side arm (48) of the reverse Slide (14) is mounted and at the level of the parallel Schnellaufachleber (10, 12) in one through narrow outer end sections (26, 28) the slide has limited space. 8. Drive according to one of the preceding claims, characterized in that that the first lever (44) at its opposite ends vertically through the slide plane running force application surfaces (54, 56) and below the slide plane arranged, U-shaped downwardly open in the longitudinal direction of Bebel (58, 60) for a reciprocal clutch engagement with one of one end of the Has rapid release lever (36) protruding pin (42). 9. Drive according to one of the preceding claims, characterized in that that the two Schnellaunschieber (10, 12) lie directly one above the other and mirror-symmetrically running, overlapping control slopes (22, 24) for power transmission have the force application surface (54) at one end of the first lever (44), and that the elongated outer slide end sections formed with end stops (30, 32) (26, 28) from the front outer ends of the control slopes (22, 24) which overlap 6 slide sections (18, 20) extend in the direction of key actuation (16). 10. Drive according to one of the preceding claims, characterized in that that the axes of the two levers (44, 46), the rapid release lever (36), the one mounted on it Schnellaufrades (40) and the winding plate of the drive are arranged parallel to one another are. 11. Drive according to claim 1, characterized in that the first and second levers (126, 128) of the lever reversing gear about axles fixed to the chassis (130, 132) pivotable in the longitudinal direction opposite end sections of the Beverse slide (104) assigned and by shifting it into its opposite switching positions are mutually adjustable in height, so that according to the set Alternating direction of travel is an arm of the first lever in the path of movement of the feed slide (100) and one arm of the second lever in the path of movement of the return slide (102) while the other arms of both levers are in both height positions when actuated one of the quick-action levers on one of two on the one in the direction of actuation of the slide opposite ends of the quick release lever existing actuation surfaces (122, 124) of the rapid release lever (116). 12. Drive according to claim 11, characterized by substantially parallel control slopes (122, 124) as actuation surfaces for attacking the two levers of the reverse gear at the associated end of the high-speed lever (116). 13. Drive according to claim 11 or 12, characterized in that the reverse slide (104) has a control cam for adjusting the height of the springs (134, 136) lever (126, 128) of the lever reversing gear pretensioned against this control cam having. 14. Drive according to claim 13, characterized in that the control cam (104 a, b, c) of the reverse slide (104) has a cam track with one between the Slide end sections lying opposite their common surface plane Cam surface (c) is raised via the run-up chamfers Ca, b). 15. Drive according to one of claims 11-14, characterized by an approximately T-shaped high-speed lever (116), on the center of which the high-speed wheel (120) is mounted, wandering at the opposite ends of the substantially parallel to the direction of key actuation transverse arm each through one the lever (126, 128) of the reversing gear can be acted upon by force application surfaces (122, 124) are located. 16. Drive according to one of claims 11-15, characterized in that that the parallel axes of the rapid release lever (116), the Shnellaufrades (120) and the winding disc ces ijaufwerkes perpendicular to the axes parallel to each other (130, 132) the lever of the reversing gear are arranged. 17. Drive according to one or more of claims 11-16, characterized characterized in that the bearing axles (130, 132) simultaneously guides the reverse slide (104) are.