DE1932804C - Miniature cassette tape recorder - Google Patents

Description

The statement relates to a one-handed, safe design of the device that is not dispensed with MHuaiur-Kasseiten tape recorder with a holding is.

device for an attachable cassette on a starting from a miniature cassette sound

Flachsexe of the device and with a hand-held device of the type mentioned above is this up-

«UncraLosehküpf for applying to or lifting 5 would be achieved according to the invention in that in addition to the

from the tape parallel to the flat side move record-playback pushbutton on edge two

sound head, which can be moved via a lever with another, in the same direction as this

at aner edge of the Uerätes and push buttons are provided, one of which is above

recording / playback that can be moved across the edge - a lever with which is stored separately from the sound head -

Is connected. _{l0 th} erase head is connected and the other than A miniature tape recorder should, in spite of its loading stop pushbutton for releasing one of the two heads

greazicn dimensions all functions off-in system on the tape holding locking

nawen can use the normal device in a tape recorder that on a narrow side of the device

Are largely realized. In addition to the pushbuttons, the devices required for this purpose Vomcoüingen, to which a belt drive, control 15 movable sliding button for switching the belt

Emncnüiiigen, magnetic heads, amplifiers, etc. transported between recording and playback. Return

hear must be provided in an extremely small coil and fast forward and that

T "* are brought on, the dimensions of which are an extension of the one with the recording-playback Hetsptelsweise MJ-6-2cm. In the interest of push-button connected lever into a T-shaped

^ J ¹ T * T ° ^ ^Ua c ^ltat , ^{SO11 there is no} unified, ao slit that protrudes into one with the

■ *? [, . ^S P ulentelk ' ^{r acting tape slide button} connected lever formed in such a way

drive use, but this the sound is that the record-playback pushbutton only

tape by means of tun shaft and pressure roller transport - when in the recording / playback position -

renand also means for the fast forward and the slide button can be pressed and the slide button

Include rewinding the tape. The one for all of these a ₅ when the record-playback push-button is depressed Baadcmcate available in the housing cannot be moved.

ηΓΛ>' ^Γ 5 τ _h A ^Ufnahme ' ^{And HaItevorric} h- Ei * Control of the tape recorder according to the invention

S 1 I ι ³ | ^KaSSeltC . ^{Because of the} 8 ^devices, Star has three pushbuttons and one

The large size of the cassette takes up a lot of space, conveniently placed next to the ^{slide button,} _{for example H} ^ ^h ™ tcr. ^red * _t ^uziert However, all 30 should, by the thumb of the right hand. Using the

L · u, iu ^{& CTd} J " ^otw ? ^Ndl S« «Operating elements Pushbuttons are switched between record and replay

Deliberately and for convenience of use, the delivery mode was chosen while controlling the

It is therefore not possible to remove the

J ^ TT ^ ^a h ^nd f ^m i ^m u ^{ler size Usual kon} " ^fol 8» · ^{This mach} <short interruptions of an Auf- ^ rdküve training simply correspondingly reduced 35 would take or playback you a simple operation for e, n M.matur- apply tape recorder. the push button _supply possible without the funda-

A * is the German patent specification 1 191 978 is additional setting of the tape recorder each time it is mounted, however, a cassette that cannot be operated by hand is changed. A mix-up of the push-button set tape recorder of the above-mentioned off and the slide button is due to "the different Γ ^ F t α ^η %" ^{which the} tape head and the ₄ "direction of movement excluded. The locking between the carrier or button, which can be moved back and forth with the iu * cn * opt in the direction of the link slot, between the carrier or button that can be moved back and forth between the inserted cassette and the recording / playback pushbutton prevents incorrect operation of the device when the device is arranged so that both heads are the same, for example, in such a way that the magnetic heads are applied to the tape with a single actuation of the tape 45 during the rattg Airch. • μ ur ^S t ^{tte a} ? 8 ^c ! ^e 8 ^l can be. This means that the device is absolutely safe to use with regard to the holder and guidance, which only "feels" when it is, for example, in a pot a relatively simple solution that is, however, kept in a pocket. The storage of the erase head, which is easy to use from the HMbWck on the cmc, makes the erase head easy to use Stop of the line is required because an electrical shutdown is not required. feegea of the simultaneous shifting of the magnetic

In the event that the tape device is necessarily relatively stiff, provision is made for the holding device to be actuated. Since the application of the sound tape for the cassette is arranged parallel to the face of the body without the erasing head being applied at the same time, and by inserting a sound ^{tape nith} | is possible. The erasure cassette must be made of an ejector plate, which can be pressed down and switched off separately against the action of springs and which is held in the pressed down position by a locking device, which is held in a simple position by a locking device forbids. 60 which by one on the rear flat side

The object of the invention is to provide a device with the device opposite the holding device! * !! ta « ¹¹⁶ " ™ ¹⁵⁸ miniature cassette-sound-eject button is detachable, and that on the

ⁿ f ⁿ "nesTonbandgcTil% ejecting plate a vertically protruding, in the« ίί u ^ f ^# T ^{the connected by an ei} ° - movement range of a second extension of the with a clear arrangement of the operating 6 _{3 of} the recording / playback pushbutton

^ ' ^ne ii ^> l ^q u ^CmC B ⁿ ? ^{In any case, also} ? *} ^{ne view} - ^Hebcls «β« "« ¹ «stop is attached, which guarantees two executable operation and features through which the second continuation» on an uncomplicated and functional set only when completely through one correctly used

3 4

Cassette pressed down or only when the housing 10 of the device is complete, there are two shells,

ejecting plate raised by the springs, namely an upper half HM and a lower half

can pass through. In this development, the half is 10 B {Fig. 2 and 3). According to Fig. I is in

Operator safety is further increased by the upper left section of the upper half HM a

that the tape recorder is only intended for correct and complete 5 opening 12 in order to accommodate a cassette.

inserted cassette can be put into operation. The opening 12 is slightly larger than that

can. Damage to the cassette or the audio cassette. As can be seen from Fig. 3, extends

tape devices are excluded. the opening 12 extends up to a side surface of the upper

Andcre further developments of the invention Ren half 10 A of the housing 10. The depth of the open

Tape recorders are defined in the subclaims 12 is according to FIG. 3 approximately equal to the thickness of the

indicates. Cassette so that after proper rinsing

The following is the invention with further front of the cassette in the device, the surface of the cassette

Partial details on the basis of schematic drawing with the surface of the housing 10 is aligned. the

Explained in more detail using an exemplary embodiment. The cassette does not therefore extend over the housing 10

It shows> 5 when inserted directly. A coffin

Fig. 1 is a front view of a miniature tape recording plate 14 is on the bottom of the opening 12 in front.

device according to the invention, seen. Springs are arranged under this plate 14

F i g. 2 is a side view of the tape recorder in net, around the cassette receiving plate 14 upwards

Fig. 1 seen from the right to press. The plate 14 has two holes 24, 26 for

Fig. 3 is a side view of the tape recorder in ao waves and three holes 34, 36, 38 for pens, so that

1 seen from the left, two drive shafts 20 which can be drilled on axles 16, 18,

Fig. 4 is a perspective view ('es tone 22 through the shaft holes 2, 4, 26 and three pins 28.

tape device according to FIG. 1 in the right hand of a 30, 32 for guiding the cassette receiving plate 14

User, and holding the cassette in its lowered position

Fig. 5 is an end view of the tape recorder after as treatment through the pin holes 34, 36, 38 protrude.

Fig. 1 with the upper half of the housing removed . %% pin hole 38 is designed as an elongated hole. Further

ses and entternter cassette, there is a hole 42 for the capstan in the cassette

Fig. 6 is a plan view of the tape recorder provided after receiving plate 14 to the KapstanwelL-

Fig. 1 from the opposite side of FIG. 5 40 to protrude. The drive shafts that

forth with the lower half of the housing removed 30 pins and the capstan are in the following at the

and removed flywheel, description of the cassette holder

7 shows a rope view in the direction of the Pi'eiles.

VII in FIG. 5, On the opposite side where the till

Fig. 8 is an exploded view of a first receiving opening 12 is provided, is a longitudinal

Safety device of the tape recorder after the opening 44 on the upper half 10 A of the housing

Invention, 10 provided. This longitudinal opening 44 extends

F i g. 9 a to 9 d show a series of actuation positions according to FIG. 2 almost over the full depth of the counter the safety device according to FIG. 8, housing 10. In the elongated opening 44 are in a

Fig. 10 is an exploded view of a second row of three keys 46, 48, 50 is provided. As in the fol-

The safety device of the tape recorder according to which 40 will be described below is the key 46 with

Invention, an erase head with a permanent magnet and

Fig. 11a and 11b representations of the actuation of the button 48 with a recording / playback head

the safety device according to FIG. 10, connected. The buttons 46 and

Figure 12 is an exploded view of a third 48 depressed simultaneously to the erase head Safety device of the tape recorder according to 45 and the recording and playback head or sound invention, head in contact with the

Fi g. 13 to bring an end view of an important part of the borrowed band. The buttons 46 and 48 are

Safety device according to FIG. 12, provided with locking devices so that they

14 shows an exploded view of a fourth after its actuation in the depressed position

Tape recorder safety device after 50 must be kept. The Tasvc 50 is a stop button.

Invention, by pressing down the locking mechanism

Fig. 15 a and 15 b end views of the device devices are released to the buttons 46 and

according to Fig. 14, 4g in their not depressed exit lapc i \\ -

Fig. 16 to make a return to an electrical circuit diagram well-known.

th device for noise attenuation of the interfering 55 For playback only the button 48 is

noises, which are pressed by direct current micro-motors to connect the tape head to the tape in

be generated to bring tion.

Fig. 17 is a diagram showing the relationship. For spatial reasons, the relationship in Liings-

between the length of the key measured by a direct current miniature motor in the direction of the opening 44

generated noise and the length of a Dros 60 46 about half the corresponding dimensions

Seispule shows, and the buttons 48 or 50. The button 46 is also therefore

Fig. 18 a device for attenuating interference selected so short to avoid the risk of incorrect operation

noises, as they are expressed on the tape recorder after pressing the button 46 all the way down.

Invention is used. switch. To record, the key 46 must always be closed.

In the drawings, identical parts are shown throughout. Ij sank when the button 48 is pressed. Around

provided with the same reference numerals. Simultaneously depressing buttons 48 and 50

F i g. Fig. 1 shows an end view of a miniature tone avoidance, a partition plate 52 is provided, the

tape device according to the invention. The rectangular between the buttons 48 and 50 is arranged. One

The opening 54 is on the lower half 10 /? of Housing 10 is formed, which at the opening 44 the upper Gehäiischälftc 10/1 abuts (Fig. 2). In the Lüngsöffniing 54 a sliding button 56 is arranged. A projection 58 is provided on the slide button 56 in order to slide the slide button back and forth to allow with the finger (Fig. 2). The sliding button 56 can be brought into three operating positions. The tape is rewound in the first uppermost position. In the second, lowest position, the tape feeds at high speed. and in the third or middle position: / wipe the first and second position becomes the tape operated at recording and playback speed. As described above, buttons 46 and 48 are for record and playback as well as the Button 50 and the slide button 56 are arranged adjacent to one another. The risk of wrong actuation of these keys and the slide key is almost completely switched off that the activating functions of loads 46. 48 and 50 perpendicular to those the slide button 56 are arranged.

As best seen in Fig. 3 can be seen. is an opening 60 for an ejector button around the edge of the lower half 10 /? of the housing 10 to receive the eject button 62. When pressing down the eject button 62, the aforementioned cassette receiving device is released to the K; i s ·. (. · ((_ ■ together with the cassette receiving plate 14 pop out and remove the cuvette from the Kassetterüuifnalime opening 12 to eject. To this Way can eject and turn the cartridge can be easily done. To record a rotary knob 68 for volume control mutually cooperating openings 64 and 66 are provided in the upper and lower halves of the gel housing 10/4 and 10 / J (Fig. 3). Fin housing 70 for emc voltage source. ζ B. is a dry cell battery iMi'letnbar arranged on the lined lip of the housing 10, /.in return can be another one Housing part containing loudspeakers between the housing 10 and the housing 70 for the voltage i | iielli · be provided.

FIG. 4 shows the miniature tape recorder according to the invention in the hand of a user the thumb are the buttons 46.48.50 for recording ilimc. Playback and stop as well as the slide switch 56 hours hard. The cassette eject button 62 can be operated with the index finger while the rotary knob 68 can be operated with the middle or ring finger. F i g. 4 shows that Device in the right hand: of course, the device can also be held with the left hand and be served. In this case you can use buttons 46, 48 and 50 for recording. Playback and Stop and the slide button 56 can be operated with the index finger and middle finger or in conjunction with the ring finger. The cassette eject button 62 and the rotary knob 68 can be operated with the thumb will. Either way, be it. that the device is held and operated in the left or right hand the cassette is on top of the Device so that the user can see it.

Fig. 5 shows the internal structure of the tape recorder according to the invention with removed upper half 10/4 of the housing 10. In Fig. 5, the position of the Cassette receiving plate 14 indicated with dot-dash lines.

Fin lift! 72 is connected to the button 46 and has a longitudinal slot. 74. through which a pin 76 attached to the chassis 80 and having a disk-shaped head protrudes. When the button 46 is depressed, the lever 72 slides inwardly relative to the chassis 80 under the guidance of the pin 76. The lever 72 has an erase head 78 with a permanent magnet. A pin 82 is provided on a member holding the erase head. A tension spring 86 is arranged between the pin 82 and a pin 84 arranged on the chassis 80.

With the button 48 , a lever H8 is integral, to which a recording / playback head or audio head 90 is attached. Fine also serves as a shield

The tape filler 92 is located on the lever 88 , which is located between the erase head 78 and the tape head 90. A slot 94 through which the pin 28 extends is formed in the lever 88. This forms part of the cassette holding device which will be described below. As best seen from Fig. Fi / w . For example, pins 93 and 95 are connected to lever 88 and extend through slots 97 and 99 of chassis 80 . The lever 88 therefore slides with respect to the chassis 80 and when descending

»5 press button 48 inwards. Another tension spring 101 is provided between the pin 93 and a pin 103 arranged on the chassis. The tension spring J (Ii biases the button 48 and the lever 88 connected to it outwards. A shoulder 96 is formed on one edge of the lever 88, and a corresponding shoulder 98 is provided on the lever 72, s;) that when the tape recorder is actuated the shoulders 96 and 98 come into contact with each other for simultaneous movement of the levers

72 and 88 into the device.

On the lever 88, opposite the edge with the shoulder 96, a projection 100 is provided with which the nose 104 of a pivot lever arranged rotatably on a shaft 112 fastened to the chassis 80

4 "102 cooperates. The pivot lever 102 has a bent portion 106 to which an end einci compression spring 110 is connected by means of a carbonated 108th The other F.nde of the compression spring 110 is provided with a bent portion of the lever 88 at its attaching end with the key 48. The pressure roller bearing pin 114 is attached to the free end of the pivot lever 102. At the head of this pin 114 , a pressure roller 118 is rotatably laced on a ball bearing 16. By means of the compression spring 110, the nose 104 of the pivot lever 102 is always against the Projection 100 of the lever 88 is pressed so that when the button 48 is depressed, the pivot lever 102 pivots about the axis 112 , whereby it is further pressed against the projection 100 by the spring 110 , so that the pressure roller 118 comes into drive connection with the capstan 40 If the button 48 is depressed further, the lever 88 moves further inward, but the pivot lever 102 does not rotate any further because the Pressure roller 118 is in contact with the Tonwclle 40 . The projection 100 is removed, therefore, moves from the lug 104 of the pivot lever 102 and the lever 88 further into the interior of the device against the resistance of the compression spring 110. The size of the contact pressure with which the platen roller 118 acts on the TonwcHc, is thus determined by the characteristics of the compression spring 110 and can thereby be kept constant.

1 η c

At the upper end of the lever 88 a further lug 120 is provided, with which when it is completely pressed down the button 48 a projection 124 on a pivot lever 122 comes into a ^ iff to the button 48 in the depressed position. As best shown in FIG. 6 to the right is the swivel lever 122 arranged to be pivotable about a Λτ / 'ise 126 fastened to the chassis 80. On axis 126 is one Dreilfeder 130 wound, one end of which on a nose 128 of the axis 126 and the other End is attached to the projection 124 of the pivot lever 122 to the pivot lever 121! against the Preload lever 88.

The stop button 50 is connected to a lever 132. This has two pins 134 and 136 (Fig. 6 and 5) which are slidably guided in slots 13B and 140 formed on the chassis 80 to enable the Depressing stop button 50 moves lever 132 inwardly along chassis 80 to lead. According to FIG. 6, between the pin 134 attached to the lever 132 and another, on Chassis 80 attached pin 144 a tension spring 142 arranged. Thus, the stop button 50 and the lever are 132 biased outwards by means of FIGS. A triangular claw 146 is integral with the lever 132 and is used to fasten a to the pivot lever 122 Pin 148 can cooperate. As described above, moves when fully down the button 48 of the pivot lever 122 clockwise and engages with its projection 124 the nose 120 of the lever 88 so that the button 48 is locked and so held in the depressed position On the other hand, when the stop button 50 is depressed, the triangular pawl 146 is engaged with the pin 148 attached to the pivot lever 122 to pivot the lever 122 opposite to that Cause clockwise and the projection 124 of the pivot lever 122 from the nose 120 of the lever 88 to remove. As a result, the lever 88 and thus the button 48 return due to the spring action the spring 101 back to its non-depressed starting position. The one assigned to the slide key 56 Actuating device should now be based on Fi g. 6 will be described. With the slide button 56 is a Slide lever 150 connected, on which a slot 152 is provided, in which a fixed to the chassis 80 Pin 154 engages. A head plate 156 is integral with the free end of the pin 154 and a plate or Leaf spring 158 is attached to head plate 156. A circular hole 160 is drilled in the free end of the leaf spring 158 about one provided therein Keep ball 162. The diameter of the hole 160 is smaller than that of the ball 162. to prevent removal of the ball from hole 160. The ball 162 is thus between the leaf spring 158 and the slide lever 150 arranged and is thus rotatable in its half in the circular Hole 160 held without the ball 162 can fall through the circular hole 160. In order to ensure an exact setting of the slide button 56 in its three actuation positions, there are three Actuating holes are drilled in the slide lever 150 that represent the three operating positions of the slide button 56 correspond. When the slide button 56 is moved, the ball 162 rolls on the slide lever 150 in each case between two of the three operating holes of the sliding lever 150 from. When the slide lever reaches one of its three operating positions, the ball falls 162 in the corresponding hole. In Fig. 6 is one of the three actuation holes of the slide lever 150 denoted by reference numeral 164. The interaction of the leaf spring 158, the ball 162 and one Hole 164 thus causes the slide button 56 to snap into place in one of its three actuating positions.

The slide lever 150 has a pin 166 attached to it adjacent one edge. At one with

ίο the chassis 80 connected axis 170 is a Swivel lever 168 pivotally supported, both ends of which are forked. One fork end 172 of the pivot lever 168 acts with the pin 166 and the other fork end 174 with another pin 176 together. The pin 176 is connected to a sliding part 178 which is on a stationary axis 180 slides. When the slide button 56 is moved, the slide lever 150 slides opposite in the same way the chassis 80 to the pivot lever 168 to the

ao axis 170 to pivot and thereby the movement of the sliding lever 150 on the sliding part 178 to its Transfer movement along the axis 168. A rotatable shaft 182 is over at d'm Glc term 178 a warehouse supported. With the movement of the sliding part 178 along the axis 180, the rotatable shaft 182 also moves in the longitudinal direction.

Three friction wheels 184, 186 and 188 are arranged on the shaft 182. The friction wheels 184 and 188 are fixed and the friction wheel 186 rotatably arranged on the shaft 182. Between the friction belts 186 and 188 a compression spring 190 is used to press the friction wheel 186 against the friction wheel 184. The task the compression spring 190 will be explained in the following. The friction wheels come separately with spool plates 192 and 194 (Fig. 5) are brought into contact to selectively drive the reel drive shafts 20 or 22. When the slide key 56 according to F i μ. 2 is brought to its top position, that comes Friction wheel 184 in contact with the back of the reel disc 194 so that the capstan drive shaft 22 5 is rotated counterclockwise to rewind the tape. The other friction wheels 186 and 188 are removed from the reel plate 192 in this position of the slide key 56. Will the Slide button 56 brought into the middle position, so the friction wheel 186 comes into contact with the back of the reel plate 192 to rotate the drive shaft 20 clockwise as shown in FIG. 5 and thereby the tape at the speed required for recording and playback in the right direction to move. If the slide button 56 is finally brought into the lowermost position, so comes the friction wheel 188 in contact with the back of the spool plate 192 to the Spulenantricbswelle 20 rotate at high speed in the direction necessary for the tape to advance. The friction wheel 188 has a larger diameter than the friction wheel 186 and the diameter of the circular path of the point on the reel drive pulley 192. weleher comes into contact with the friction wheel 188 is smaller than that of the path of the point, which with thorn comes into contact with the other friction wheel 186. Therefore, the reel table 192 and the reel drive shaft rotate 20 with a comparatively low

speed. when the slide button 56 is "in its lowest position is- ^ t. During the return and forward travel, the pressure roller 118 is off the Capstan 40 held away because the tape is at

109 684/307

does not need to move these processes at a constant speed. The friction wheels 184 and 188 are therefore firmly connected to the shaft 182 '. During recording and playback mu However tape at a constant Geschwindigkf i move it. Therefore, during these processes, the pressure roller 118 is pressed against the capstan 40, and the friction wheel 186 is not integral with the shaft 182, but is rotatable with respect to the shaft 1W2. The friction wheel 186 is pressed by means of the spring 190 in the direction of the adjacent friction wheel 184, so that there. Friction wheel 186 can rotate with variable slip with respect to the rotational speed of the shaft 182 in order to produce recording and playback which varies with the diameter of the wound bar of the rotational speed.

As described above, the: friction wheels 184, 186 and 188 separately brought into contact with the bobbin plates 192 and 194, respectively by pressing the slide button 56 To facilitate the movement of the friction wheels, the shaft should 182 can be moved not only in its longitudinal direction but also in its transverse direction. To this end a soft compression spring 179 is arranged between the pivot lever 168 and the sliding part 178, so that the bearing portion of the slide which supports the shaft 182 and the shaft 182 itself slightly are vorgespsnnt away from the pivot lever 168. Fi g. 6th shows the pivot lever 168 and de shaft 18 ;! in their recording / playback position, with a selector switch for recording and playback (not shown) is switched to playback. With the capture button 46 depressed, press a pin attached to the lever 72 upwards the free end of a pivot lever 67 (FIG. 6), around the Swivel lever 67 clockwise around a stationary pin 09 against the force of a deer spring 75 ' sway. As a result of this pivoting, a lever 75 (FIG. 5), which will be described in the following, moves up to the Record-Play switch mentioned above to bring into recording position.

According to FIG. 5, the shaft 182 is connected to a drive roller 196 in a ghosting manner. The shaft 182 can because of its longitudinal movement on the grand scale of the movement of the slide button 56, it is not firmly attached to the drive roller 196 be connected. A sliding spring 198 is therefore between the drive roller 196 and the Shaft 182 is provided, one end of the spring with the drive roller 196 and the other end of the A spring connected to the shaft 182 to transmit the rotation of the drive roller 196 to the shaft 182. The drive roller 196 is mi: the drive shaft 204 of the motor 202 by means of an endless belt 200 connected. The engine: IO2 is by means of two axles 206 and, which protrude at right angles from the chassis 80 and are attached to support arms 208 pivotally supported. A helical spring 210 is wound around the axis 206, one end of which is attached to the support arm and the other end thereof to a projecting arm 214; t so that the left end the drive shaft 204 of the engine in F i g. 5 is biased into the plane of the drawing. As long as the button 48 is in its non-depressed position, a function is applied to the motor 202 attached lever 216 together with the right end of the pivot lever 102 to control the movement of the limit the left end of the drive shaft 204 into the plane of the drawing 2u. When pressing down the Button 48 pivots the pivot lever 102 counterclockwise.iin about the axis 112, and the right one End of pivot lever 102 moves away from lever 216 to allow movement of the left end of the drive shaft 204 to allow the motor 202 in the direction of the plane of the drawing. This comes in at the left free end of the drive shaft 204 arranged further friction wheel 218 in contact with

ίο the outer part of the peripheral surface of a flywheel 220 (indicated in FIG. 6 by a dash-dotted circle) in order to drive the flywheel 220 in this way.

In the center of the flywheel 220 is coaxial so that the capstan 40 is perpendicular to the plane of the Flywheel arranged and by means of a ball bearing 222 of a triangular Tonwellenhalier 224 (Fig. 6) versus chassis 80. When the stop button 50 is depressed, the locking mechanism is activated 120, 124 of the key 48 as described, released, and the key 48 returns under the Action of the tension spring 101 back to its original position. The pivot lever 102 rotates accordingly clockwise due to the

«5 action between the protrusion 100 of the lever 88 and the nose 104 at the left end of the pivot lever 102. The right end of the pivot lever 102 engages engine lever 216 about the left end of drive shaft 204 of engine 202 to push away from the plane of the drawing in FIG. 5 against the force of the spring 210, so that the friction wheel 218 is removed from the flywheel 220.

F i g. Fig. 5 shows the cassette receiving plate 14 with dotted lines. The cassette receiving plate As described above, 14 has two holes 24 and 26 through which the spool drive trains 20 and 22 protrude, three pin holes 34, 36 and 38 through which the cartridge holding pins 28, 30 and 32 protrude Hole 42 through which the capstan 40 protrudes, and

two additional holes for receiving two axles 226 and 228 attached to the chassis 80. A coil spring sits on each axis 226 or 22β in order to push the cassette receiving plate 14 away from the chassis 80. On the cassette receiving plate 14 two pins are attached, the free ends of which through the Chassis 80 provided pin holes 230 and 232 protrude. More coil springs are pushed over these pins, in addition to a biasing force for pushing away the cassette receiving plate 14 away from Apply chassis 80. The lower position of the cassette receiving plate 14 is by one on the pin 30 attached jaw 234, the head of pin 76, the head of a shaft 236, to be described, and the upper end of a retaining pin 238 defines. When the cassette receiving plate 14 is in its lowered position Is located, it is still from the reel plates 192 and 194 with an expedient Play away, and at the same time the erase head 78, the tape head 90, the shield 92 and the Move the pressure roller 118 above the cassette receiving plate 14. The following is the cassette receiving device for holding both the cassette Is and the cassette receiving disk 14 in their lowered position Position and a cassette ejector for releasing the cassette holder, to eject the cassette from the device, described in detail. As described above, the Movement of the cassette receptacle 14 right

IQ R 2

angled to chassis 80 by attached axles 226 and 228 and by a pair on the Back of the cassette receiving plate 14 attached Pins guided that protrude through pin holes 230 and 232 in chassis 80. On the axles 226 and 228 and said pins seated coil springs to the cassette receiving plate 14 from Push chassis 80 away. When the cartridge is seated in the cartridge receiving opening 12 and pushed down the pins 28, 30 and 32 penetrate through their associated holes in the housing of the Cassette.

The pivot lever 240 is supported by means of a stationary axle 242 (FIG. 6) arranged on the chassis 80. At the end of the pivot lever 240 opposite the pin 32, a projection 244 is integrally formed. A compression spring 246 is provided between the pivot lever 240 and an arm 248 projecting vertically upwards from the chassis, one end of which is attached to the extension 244 and the other end of which is attached to an extension of the Ar 3S 248. As a result, the pin 32 attached to the pivot lever 240 is pressed against a recess 250 formed on the chassis. The cartridge eject button 62 is pivotably arranged about the axis 242. A leaf spring 252 is provided between the pivot lever 240 and the ejector button 62 and is fastened to the pivot lever by means of a screw 254 in order to bias the ejector button 62 with the leaf spring outwards in the direction out of the device. When the eject button 62 is depressed, it pivots about the axis 242 until it comes into contact with the pivot lever 240 against the force of the leaf spring 252. The pivot lever 240 is only actuated when the eject button 62 comes into contact with it and the pin 32 is still cooperating with the recess 250. When the eject button 62 is depressed further, the pivot lever 240 pivots about the axis 242 so that the pin 32 moves out of the recess 250 towards the outside of the device. That shaft portion of each pin 28, 30 and 32, respectively, which comes into contact with the surface of the holes drilled in the housing of the cassette when the cassette is brought into operation, is chamfered on one side, as shown at 256, 258 and 259 in FIG G. 7 is shown. The upper end of the pins 28, 30 and 32 is also bevelled on one side, as shown at 260, 262 and 264 (FIGS. 5 and 7) to facilitate the mounting of the cassette in the device through the cooperation of the aforementioned holes in the Housing the cassette with the bevels at the beginning of the insertion of the cassette into the opening 12 to facilitate.

When the cassette placed in its position on the cassette receiving plate 14 is pressed down against the chassis, the head portions 260, 262 and 264 of the pins 28, 30 and 32 retract into their associated holes in the housing of the cassette. Upon further depressing the cartridge, the shaft portions of the pins 28, 30 and 32 penetrate the holes, producing direct contact between the pin surface and the surface of the corresponding cartridge holes. As a result, the pin 32 is pushed away from the bottom of the recess 250 by pivoting the lever 240 against the action of the spring 246 , in order to enable the cassette to be pushed down into its completely recessed position. When the cassette is brought into its operating position, the compartment protruding shaft sections 256, 258 and 259 of the pins 28, 30 32 are in contact with the edges of the corresponding openings of the cassette housing, and the pin 32 is due to the action of the spring 246 over the pivot lever 240 against the pins 28 and 30 ge prints to keep the cassette in its Bctriebsstelluni.

When the cartridge eject button 26? down-

ίο is depressed, the pin 32 moves from the pin 28 and 30 away or in the direction out of the device, whereby the cassette against the pins 28 unc 30 pressing force is removed. The cassette and the cassette receiving plate 14 jump there

away from the chassis 80 under the action of springs disposed on axles 226 and 228 and other axles provided on the rear of the cassette receiving plate 14. The cassette receiving plate 14 moves up until it comes into contact with the upper half 10 A of the housing 10 and is brought to a standstill there. The cassette, on the other hand, jumps out of the device through the opening M in the upper half VQA of the housing 10 . To the Bewepung of the pin 32 from the pins 2fl

As and 30 to enable away, the hole 38 (FIG. 11J in the cassette receiving plate 14 for receiving the pin 32 is formed as an elongated hole extending in the direction of movement of the pin 32).
7, an arm 268 is connected to the chassis 80 by means of a screw 266. The drive roller 196 is rotatably supported on the arm 268. A printed circuit board 272, which contains the electrical circuitry of the tape recorder, is attached to the upper flange portion of the arm 268 by means of a screw 270.

According to Fig. 6, a protrusion 274 is formed on the lever 88, which is connected to the button 48, the protrusion 274 protruding through a slot 276 provided in the chassis 80. Another The pivot lever 278 is pivotably mounted on an axis that is stationary with the chassis 80. A coil spring 282 is about the axis 280? Jen, one end of which has a bent portion 284 at the right end of the pivot lever 278 and the other end on one provided on the head of the axle 280 Recess 286 is attached. The coil spring 282 is arranged to support the pivot lever 278 bias counterclockwise, (in Fig. 6). At the right end of the pivot lever 278 is a pin 288 is attached which extends through the opposite side of the chassis 80 through provided there extends hole 292 (Fig. 5). At the free end of the pin 288 is a resilient braking member 290 attached. When buttons 46 and 48 are in the depressed position and the Slide button 56 is in its middle position (F i 15, 5 and 6), the elastic braking member 290 is in Maintained contact with the peripheral surface of the reel plate 194 in order to have a braking effect on the reel

plate drive shaft 22 exercise. When the record and play button 48 is depressed, the protrusion 274 (Fig. 6) of the lever 88 connected to the button 48 moves up and comes into contact with the left end of the pivot lever 278, clockwise about the stationary one Axle 280 to pivot against the action of spring 282. As a result, the elastic braking member 290 (Fig. 5) moves from the circumference of the coil

19 * 2

I 932 804 3

13 14

ellers 194 to cancel the braking effect. is, is not actuated, the actuating arm is through the

The hole 292 should be large enough to hold the moving angled section 284 pushed upward

uing of the elastic braking member 290 of the stifies 288 (as shown in Fig. 6) and stands with a

to allow larin. upper electrical contact 306 in contact. When If the stop button 50 is pressed down, the actuating arm 304 will return to this upper position.

If the button 48 and the lever 88 are not held down in theirs, the motor 202 is not switched on. When

[! moved back to the original position, so that the key 48 is depressed or when the

Swivel lever 278 counterclockwise to slide button 56 into the rewind position or into the

the axis 280 is brought under the action of the spring 282 fast forward position, the pivots pivots. As a result, the elastic brake member takes the pivot lever 278 clockwise, and the actuating

290 its contact with the circumference of the coil arm 304 moves away from the upper elec-

plate 194 again to apply a braking force to the tric contact 306 and touch a lower one

Spool drive shaft 22 exercise. By off electrical contact 308 of the on-off switch 302.

exerting the braking force on the drive shaft 22 of the case held in contact with the contact 308

The rewinding pulley is loosened by the tape 15. The actuating arm 304 is the motor 202 actuated. The-

prevented due to inertia. that section of the control arm 304 of the

It should now be noted that the aforementioned off switch 302, which controls the angled

Brake including the elastic braking member cut 284 is electrically isolated.

290 can also be actuated via the slide button 56. On the one connected to the record button 46

According to FIG. 6, the pin 63 is arranged on the pivot lever 168 by means of ao lever 72, which is located

Screws 296 and 298 close to the stationary one extends through the hole 65 of the chassis 80. the

Axis 170 is a cam plate 294 with a V-för pivot lever 67 attached to the chassis 80

migen cam (dashed) attached. Can be pivoted as above on axis 69. The left in Fig. 6 end of the

wrote, the pivot lever 168 has a fork pivot lever 67 can with the pin 63 in engagement

th section 172 that come with the pin 166 on the left as. The opposite end of the swivel

l.iule of the pivot lever 150 is engaged, which is 67 is bent so that it is to the opposite

chei in turn connected to the slide button 56 is set end of the chassis 80 along its edge

(see Fig. 1). A shown in phantom in Fig. 6 extends. At this end of the pivot lever

Projection 300 is on the left end of the pivot 67, the lever 75 is by means of two fastening screws

licbels 278 molded. When the slide button 56 is 30 ben 71 and 73 attached. The lever 75 is used to

is in its middle position, the electrical contacts are switched on before

spi unj! 300 at the central opening of the V-shaped take-play selector switch. At a step

Cam plate 294. portion of chassis 80 angled without an operational instruction is a

gripped between the cam plate 294 and the pre-pin 77, on which a spring 79 is arranged

jump 300 to effect. Therefore the elastic 35 is (Fig. 6). One end of the spring 79 is on the lever 75

Brake member 290. which is attached to the on the opposite (Fig. 5). while the other end of the

set end of the pivot lever 278 attached spring 79 is attached to the chassis 80 (Fig. ft). the

Still 288 is disordered, by the spiral spring 282 elastic eggs, .nschaftcn the spring 79 are so arranged

gcpen pressed the circumference of the reel plate 194, selects that the lever 67 as shown in FIG.

when the button 48 is not depressed 40 is set in the clockwise direction around the axis 69

Position. When the slide button 56 is pivoted due to the action of the spring 79,

If the buttons 46 and 48 are pressed down at the same time, the

Swivel lever 168 are pressed clockwise about the axis, the pin 63 pivots on the with

170 rotated according to FIG. 6, due to the lever 72 connected to the button 46, the pivoting

/ usainmcnektiven between the forked end 45 lever 67 clockwise about the axis 69 against the

172 of the lever 168 and the angcord force of the spring 79 on the lever 150.

Neten pin 166. This brings the right leg transfer switch into the receiving position,

The V-NuI of the cam plate 294 in contact with As shown above. there is a soft

the projection 300 and presses the projection 300 compression spring 179 / between the pivot lever 168 and

to the left, around the lever 278 in a clockwise direction to the glc Share 178. around this around the axis 180 against

sway. As a result, the brake member moves the chassis 80 to print (Fig «) · Thus

290 away from the circumference of the reel plate 194. Other- optionally the friction wheels 184, 186 or 188 against the

on the other hand, the pivot lever 168 pivots opposite the rear of the reel plate 192. 194 printed, and

clockwise when the slide button 56 is in the position with the interposition of the l'cdcr 179.

rapid advance is brought, and dns 55 In the miniature tape recorder according to the F.

nberc \ walls of the left leg of the V-groove of the cam dung can all Bctätigungsorganc reliably and

The counter plate 294 does not come into operation with an exactly interference-free operation, whereby the device

the projection 300, but with the left edge of the is held with one hand and in particular one

left end portion of the pivot lever 278, in order to exclude the precise and reliable actuation

left end of the lever 278 to be pressed upwards 60 by feeling, without the Bcdie

(Fig. 6). As a result, the pivoting lever 278 swivels the need to be seen,

against the force of the spring 282 in a clockwise direction, in order to 8 to 9 d a «

the elastic braking member 290 of the circumference of the tape recorder according to the invention is used

To push away the spool plate 194. bare safety device are described. Eit

The angled section 284 at the right end 65 pin 330 is integral with the slide button 56

of the pivot lever 278 (Fig. 6) also acts as a Vigcn Schicbchebe! 150 attached. The pin 330 protrudes

Actuating arm 304 of an on-off switch 302 through a slot 332 provided on the chassis 80

\ Wnn the motor as shown in the figures which extends in the same direction as de

ft

32 804

Slot 152 in sighting lever 150. The sliding button 56 the described embodiment of the invention can assume three operating positions: a first or in F i g. 8 rightmost position for rewinding the tape, a second or leftmost position for fast forwarding the tape and a third or middle position between the first and second positions for the receiving and the Reproduction.

A projection 334 (FIG. 8) is located on the lever 88 which is part of the lever 88 which is part of the recording / playback button 48. provided which protrudes through a slot 335 in the chassis 88 and into the slot 152 of the slide lever 150 fits, which is connected to the slide button 56. The slot 335 extends in the direction into which protrusion 334 can move, i. H. in the direction of movement of the button 48 at their Press down.

When the slide button 56 is in its third or middle position, the projection 334 also acts "In recess 336 on lever 150 together," which opens into slot 152 and joins in the right Angle to the direction of movement of the slide button 56 extends. The recess 336 thus extends in the direction of movement of the button 48. The width of the recess 336 is slightly larger than that of protrusion 334, and the length of recess 336 is slightly greater than the travel distance of the record-playback button 48. The slot 335 extends in the same direction as the recess 336. Therefore, when the slide button 56 is in In the third or middle position, there is protrusion 334 of the record-playback button 48 opposite the recess 336, as shown in FIG. 9 a is shown. When pressing button 48 the projection 334 moves along the recess 336 (Fig. 9d). Therefore, when the slide button 56 is in its middle position, by depressing button 48 or by pressing the button at the same time Depressing the buttons 46 and 48, playback or recording can be accomplished.

When the slide button 56 is in its first or second position, the projection 334 stands the load 48 according to FIG. 9 c or 9 d opposite a wall of the slot 152 away from the recess 336. In this case, if the user attempts to depress button 48, its movement is complete interference of protrusion 334 with the corresponding edge of slot 152 prevents. In this way, pressing the record / play button will be 48 excluded during the forward ii · α of rewinding.

If nndcrerscits (into the tape recorder in the recording h / v ·. Playback mode is working, the projection 334 of the button 48 hooks into the recess 336 of the slot 152 gcmiiß F ι g. 0 b. The movement of the Slide button 56 to the right or left (Hg. H) is (by the interaction of the projection 334 with the side edges of the recess 336 prevented. When the device is recording and playing back As a result, rewinding or fast forwarding is prevented.

As described above, the safety device of the device is according to the Hrfindunp. in their structure very simple and has a small footprint, which is why they choose a miniature tape recorder in particular suitable. The safety device effectively prevents incorrect operation of the device; while fast forwarding and rewinding the tape, there is neither recording nor playback possible, while neither rewinding nor faster during recording and playback S The advance of the tape is adjustable. The miniature tape recorder can therefore be accurate and reliable be actuated by feeling, without it being visible. For example, the miniature tape recorder kept in a pocket and with it, without

to that it has to be taken out of the pocket.

In the miniature tape recorder of the construction described, it moves when pressed down the record-playback button 48 on the lever

88 arranged tape head against the tape in the cassette, and at the same time the pressure roller 118 is pressed against the capstan 40, with the tape between the pressure roller uc ^: the capstan. When the record play button

ao is pressed down while the cassette is being inserted or when the cassette is improperly inserted, seeks the pressure roller 118 to come into contact with the cassette receiving plate 14, which leads to can damage the pressure roller.

a5 Since the pressure roller 118 at the free end of the Pivoting lever 102 is arranged, which in turn is pivotable about the axis 112 and by means of between the button 48 and the free end of the pivot lever 102 arranged spring, as on hand 5 to 7 described, is biased when the button 48 is in its central position Cassette 14 is pressed down, the pressure roller comes first with the edge of the cassette receiving plate 14 in contact, whereupon the sound head 90 when the button 48 is depressed further comes into contact with the cassette receiving plate 14. In other words, in this case it won't only the pressure roller 118 but also the tape head 90 exposed to possible damage. The Tape recorder according to the invention can therefore also comprise a further safety device to the to avoid the difficulty mentioned. However, this safety device is simple in structure and allows you to press the record-play button only if the cassette is properly inserted in the device. and prevented the movement of the record play button 48 both with improperly inserted cassette as even while the cassette is being inserted. Such a safety device is characterized by that an extension 340 on the one with the record play button 48 one-piece lever 88 is formed (Fig. 10), the lever / around pressing of the tape head 90 and the pressure roller Ui is provided. and that a stop 342 is vcrtika from the lower surface of the cassette knob 14 in cmc with the I nrtsal / 340 / usammcnwii kcikK Position extends, with a depressing animal habenc-Wicdergabe- Faste 48 through the cooperation of the extension 340 and the stop 342 zi prevent, and that the stop 342 has two recesses 346 and 348 through which de Extension 340 only when fully depressed by a correctly inserted I scttc or only bc

f'5 fully raised cassette receiving platform can pass through.

The safety device for the cassette should now be detailed with reference to FIGS. K) to II b bc

17 18

be written. The extension 340 is in one piece when pressed, the eject button moves the cartridge end lever 88, which is firmly connected to the hold-open pin 32, which is connected to the play button 48 pivotably on the chassis 80. A hinged lever 240 is attached. If the rash 342 is perpendicular to the back of the throwing pin during rewinding or the fast cassette receiving plate 14 down, and so, 5 forward of the tape is pressed down, there is a risk that it is shown in FIG. 10 with the extension 340 of the tape damaged. As above lever 88 can work together. In the chassis 80 described, the miniature tape recorder according to FIG. 4 is provided a hole 344 in order to operate the stop 342 of the invention solely by feeling, without being visible to the user when the cassette receiving plate 14 is pressed down, e.g. B. to pass in to insert a cassette. Recesses 346 and 348 are provided on the io of a user's pocket, and there is therefore the upper and lower ends of the stop 342 that the user inadvertently ejects the ejector. If no cassette is inserted while rewinding or fast forwarding button 62, the cassette is pressed.

receiving plate 14 by compression springs 350, 352, 354 FIGS. 12 and 13 show a safety device 356 held in its raised position. In 15 device to prevent such incorrect operation, this position aligns the lower recess 348 with the pressing down of the eject button 62 to the stop 342 with the extension 340, so that the release of the cassette during rewinding and recording playback button 48 the advance is prevented from being pressed down. The security device can. When a cassette has been inserted correctly, a prerequisite includes the slide button 56, which is the cassette receiving plate 14 in its ao first rewind position, a second forward position against the force of the compression springs 350 to 356 full and a third position for recording and Again in the lowered position so that the upper recess can assume the operatively connectable opening 346 of the stop 342 with the extension 340 sliding part 178, wherein in that area of the Ausdes lever 88 is aligned in order to in turn the throw-off button 62, which is attached to the sliding part 178 opposite, press the record-playback button to enable a projection 362 is molded and a recess. The recesses 346 and 348 are large mung 360 is provided on the slide, in which enough to allow free passage of the extension 340 at the projection of the eject button, depressing the record / play button 48 when the slide button is in its third position . is located.

11 a shows the position of the stop 342 against 30 According to FIGS. 12 and 13, the movement

over the extension 340, if k ^ .a cassette in the slide button 56 on the slide 178 over a

Device is used, the extension 340 by the pivot lever 168 articulated on the chassis 80 (see also

lower recess 348 of the stop 342 protrudes, transferred to Fig. 6). When the slide button 56

allow the button48 to be depressed. Fig. 11b moved to the right into its first position (Fig. 12),

shows the position of the stop 342 with respect to the 35, the sliding part 178 moves to the left. If other-

Extension 340, when the cassette is properly positioned on the other hand, the slide button 56 also according to FIG. 12

the device is inserted, with the appendix 340 being moved to its second position to the left, moves

the upper recess 346 of the stop 342 protrudes, the sliding part 178 to the right. So if the sliding

to allow button 48 to be depressed. Feel yourself in its third or middle position

However, when the cassette receiving plate 14 40 is in place, the slide 178 is also held in its mid-position between its raised position. The eject button 62 has a projection 362 in the position according to FIG. 11a and in the lowered position of that side which is located opposite the sliding part 178 according to FIG. 11b, the tip of the projection strikes. At that section set 340 at a stop 342. If the slide 178, which is opposite the projection 362 in the user pushes the record / playback button 48 in the middle position of the slide, is attempted to press down, a recess 360 is provided, which is the third movement Button 48 corresponds to the interaction of the position of the slide button 56, so that the extension 340 of the lever 88 with the stop 342 prevents projection 362 from plunging into the recess 360. The recording / playback button 48 can therefore not be depressed as long as the slide button 56 is in its third mode. 50 position is held.

As a result, the pressure roller 118 and the If the sliding part 17? is located in its middle head 90 by the safety position described, the eject button 62, which is very simple in its construction, can be printed to protect the pin 32 on the outside of the and only takes up a small amount of space. Device to move to thereby the cassette-The safety device described is triggered with another locking device and eject the cassette Ren words especially for a miniature tape recorder from the device. Figure 13 shows the slide suitably according to the invention. part 178 in its middle position, it being with the

In another embodiment, the safety ejector button 62 can interact. If the

The device can be the extension 340 of a with the slide button 56 for rewinding or for fast

Lever 88 connected rod and the recess 60 advance is briefly adjusted, the sliding part moves

gen 346 and 348 from at the corresponding points 178 from its middle position to the left (Fig. 13)

of the stop provided round holes or to the right, as indicated by the arrows REW and

through which the rods fit. FF is indicated in FIG. If the user

When executing the tape recorder according to which the eject button 62 then presses, the front * Invention according to the F ί g. 1 to 11b an ejector * 65 jump 362 is provided on the not buttoned with a recess 62, through the actuation of which the sections of the slide 178 are shown, so that the The cassette side and the cassette receiving plate eject button 62 cannot be pushed down, is pushed outwards. When it is down with the safety device according to FIG. 12

and 13 can thus press down the ejector button 62 and the subsequent ejection of the Tape can be prevented during rewinding and fast forwarding.

Further, if the eject button 62 is depressed while the device is in recording or Witdergabetwtrieb is caused by the Latching device detached cartridge damages the tape and separates in some cases the 3and. If the cartridge moves even a little, the head and the the tape and the movement of the tape, so that the sound quality suffers. As described above, can beüüipt the device according to the invention exclusively by feeling, without the user seeing it be e.g. B. while the user holds it in the ash. There is therefore a risk that the User accidentally depresses eject button 62 during recording or playback.

The F i g. 14 to 15 b show a safety device for preventing such a remote control, which the device according to F i g. 1 to 13. The safety device prevents the eject button 62 from being depressed to release the cassette during recording or playback, as well as slight movement of the cassette. The safety device is characterized in that, by means of the extension 340 of the lever 88 connected to the record / playback button 48, a component 372 provided with a cam surface 374 can be displaced against the action of a spring 388 transversely to the direction of movement of the record / playback button 48 and that a pin 384 fastened to the component 372 is located in the range of motion of a projection 390 of the ejector button 62 when the component is displaced.

According to the figures, the extension 340 is integrally formed on one end of the lever 88, which is integral with the record / playback button 48 and has a sound head 90. A component 372 is arranged displaceably on the chassis 80 and has a cam surface or bevel 374 on its gate cooperating with the extension 340 of the lever 88. At the two opposite ends of the component 372, slots 376 and 378 are provided, through which the pins 380 and 382 which are fixedly arranged on the chassis 80 protrude. As a result, the component 372 is guided at a right angle to the direction of movement of the eject button 62. A stop pin 384 is fixedly connected to component 3 ″ * 2 and protrudes through the chassis 80. A projection 386 is provided on the lever 240 cooperating with the cassette eject button 62, and a tension spring 388 is arranged between the projection 386 and the stop pin 384 When the record-playback button 48 is in its unpressed position, the component 372 remains in its inoperative position or is held in its left position by the spring 388. When the button 48 is pressed down, the tip of the appendix comes out 340 in engagement with the abutment 374 of the component 372. When the button 48 is pressed further, the extension 340 forces the component 372 against the force of the spring 388 to calculate (FIG. 14), through the interaction between the Tip of the extension 340 and the bevel 374 of the component 372. As a result, the stop pin 384 also moves to the right a projection 390 is formed on the ejector button 62 so that the stop pin strikes the projection 390 when the component 372 is moved to the right. The width of the projection 390 is dimensioned such that when the component 372 is returned to its left starting position due to the action of the spring 388, which is achieved by pressing the button 50 and the resulting return

O movement of the record-play button 48 is triggered, the pin 384 moves away from the projection 390 so that the eject button 62 can be pushed into the device.

Fig. 15a shows the position of the pin 384 with respect to

Hch of the eject button 62 in the event that the button 48 is not depressed. The pin 384 is located outside the movement path of the projection 390 of the eject button is 62. So this one can be pressed down to the pivot lever 240 around

au to rotate the axis 242 and thereby move the pin 20 towards the outside of the device. This releases the cassette holder. 15b shows the position of the pin 384 with respect to the eject button 62 when the record / playback button 48 is depressed. In this case, the stop pin 384 of the component 372 comes into contact with the projection 390 of the eject button 62, and as a result the projection 390 strikes the stop pin 384 when the ejector button 62 is depressed so that it cannot be depressed effectively.

With the described safety device

the depressing of the cartridge eject button 62 and the consequent popping out of the cartridge effectively prevented during recording and playback.

In order to achieve satisfactory acoustic properties of the tape recorder, those of electrical noise from the commutator and brushes of the DC miniature motor c be dampened. The tape recorder according to the invention therefore comprises a special device to prevent such noise.

Fig. 16 shows a known circuit for preventing electrical noise generated by a DC motor, in which a filter having a choke coil L and a capacitor Γ between the motor M and a feed switch S is inserted. In order to miniaturize the tape recorder, the direct current miniature motor must be arranged close to the playback amplifier of the device. The filter according to FIG. 16 should therefore be arranged as close as possible to the DC miniature motor. If the filter is far away from the motor, the connection line between the motor and the filter becomes too long and can possibly run past in the immediate vicinity of the filter, or the choke coil itself can be arranged close to the amplifier, so that the effect of the filter is reduced in size and the electrical disturbing noise increases. The choice of the position of the choke coil is therefore very important.

In addition, placing the choke coil in the tape recorder would take up a considerable amount of space taken, reducing the miniaturization of the

it would be questioning tape recorder.

In order to avoid the enumerated difficulties of the known filter circuit, the invention provides a special device for damping a

electrical noise generated by a DC motor, with no dro «e! pu! e used and wherein the filter circuit does not require any significant additional space within the tape recorder claimed.

The damping device will now be described in detail with reference to FIGS. 17 and 18. Between the two leads, namely the positive and the negative lead from the voltage source to the DC miniature motor, there was one Choke coil of variable length arranged. For different lengths of the choke coil, the electrical noise generated by the motor was measured. The result is shown in FIG. As the length of the choke coil connected to the motor increases, the electrical ones decrease Interfering noises first quickly and then less quickly, depending on the type of engine and the type of electrical noise plays a role. It was found that the one caused by the throttle Attenuation of the electrical noise mainly on the length of the winding and only in the second Line depends on the number of turns and the type of winding of the coil. The background noise can thus, according to the inventors, by using one winding effective up to an acceptable one Level to be dampened. If a Gleichsirom small engine So over a sufficiently long winding with an acceptable ohmic resistance is operated, the noise originating from the DC motor can be large Part of being dampened.

In the tape recorder according to the invention, this winding is within a shielding housing provided, which surrounds the motor to prevent the spread of magnetic noise. If the winding were in the vicinity of the amplifier circuit or the input circuit, so it would increase the electrical noise. The arrangement of the winding is thus in the present case Invention problematic.

According to FIG. 18 is a winding 480 around the circumferential surface of the DC miniature motor 202 and wound by a motor 202 covering Shield housing 482 surrounded.

By placing the winding 480 between the motor, 102 and shield 482, the Propagation of electrical noise from the winding 480 to the amplifier or input circuit effectively prevented by means of the shield 482. In addition, there are supply lines leading from the shielding 482 to the voltage source 486 484 the electrical noise has already been attenuated to an acceptable level. The leads 484 therefore cannot cause an increase in electrical noise even if it is close to the Amplifier or input circuit of the device.

The ohmic resistance of winding 480 can be increased by using a very thick wire for the Winding can be minimized, which is in the space between the motor 202 and the shield 482 is permissible.

The winding 480 is preferably made by winding the leads 484 directly onto the circumferential surface of the DC miniature motor 202 formed before the leads 484 to the motor terminals be connected.

In the described damping device, the use of a long winding 480 provided in the space between the motor 202 and a shield 482 can effectively dampen the noise from the DC motor without taking up additional space in the tape recorder. The ohmic resistance of the winding 480 can easily be kept small. The damping device according to the invention can also be simple and with little

ίο costs to be established.

Claims (10)

Patent claims: 1. One-hand operable miniature cassette tape recorder with a holding device for a clip-on cassette on a flat side of the device and with an erasing head to place on the b? W. Lifting off from the tape recorder, which is displaceable parallel to the flat side and which is connected via a lever to a recording / playback pushbutton which is arranged on an edge of the device and which can be moved transversely to the edge, characterized in that next to the recording / playback pushbutton (48) the edge z \ - * i further pushbuttons (46; 50) which can be moved in the same direction as these are provided, one of which is connected via a lever (72) to the erasing head (78) mounted separately from the tape head (90) and the other as a stop pushbutton (50) for releasing a locking device (120,122) holding the two heads in contact with the tape, that on a narrow side of the device (10) next to the pushbuttons, a sliding button (56) that can be moved transversely to these is used to switch the Tape transport between recording-playback, rewinding and fast forward is provided and that an extension (334) on the lever (88) connected to the recording-playback pushbutton in a T- shaped link slot (152, 336) protrudes, which is formed in a lever (150) connected to the slide button in such a way that the record / playback pushbutton can only be pressed when the slide button is in the record / playback position and the slide button can only be pressed when the record / playback position is pressed. Playback-Prints — .te cannot be moved. 2. Tape recorder according to claim 1, characterized in that the holding device (20, 22, 24) for the cassette is arranged parallel to the flat side of the device (10) and by inserting a cassette against the action of springs (350, 352, 356 ) Comprising lowerable Auswerfpl.n te (14), which is held in the pressed-down position by a latching device (32, 240) which is releasable by an ejector button (62) provided on the rear flat side of the device opposite the holding device, and that on the ejection plate has a vertically protruding stop (342) which projects into the movement area of a second extension (340) of the lever (88) connected to the recording / playback pushbutton (48) and which has two recesses (346; 348) through which the second extension only when fully 1982 2.1 constantly depressed by a properly inserted cassette or only with the ejector plate fully raised by the springs (350, 352, 354, 356) can pass through. 3. Tape recorder according to claim 2, characterized in that that the volume control (68) is provided next to the eject button (62). ■ 4. Tape recorder according to claim 2 or 3, thereby characterized in that they connect the heads (78; 90) to the associated pushbuttons (46; 48) Levers (72; 88) carry the heads at their ends and together with one with # Lever connected to the stop pressure door (50) 1132) slidable on a stepped drawn Chassis (80) are mounted, which is with • inem upper, the lever-bearing section in area of the hall device (20, 22, 14) approx in the middle between the two flat sides of the Cicrates (10) .ind parallel to these and with • sealed in a lower, enen amplifier (272) and a drive motor (202) carrying section Lifting the rear flat side extends. 5. Tape recorder according to claim 4, characterized gelennzcichnet that the shaft (204) of the drive motor (202) extending in the longitudinal direction of the derate (10) through the angled section of the chassis (80) to a rotating parallel to the upper chassis section, · ' a Kapstanwelle (40) attached flywheel (220) is enough, and that the drive motor for pressing or lifting its shaft on the Ivw. is pivotally attached by the flywheel. (1. Tape recorder according to claim 5, characterized in that the pivoting movement of the drive motor (202) and the application movement of a pressure roller (118) on the Kapstan shaft (40) by means of the recording / playback and the stop I) rucktastc (48 ; 50) can be controlled via the levers (88; 132) connected to these pushbuttons. 7. tape recorder according to claim 5 or 6, characterized in that under the upper Ab section of the chassis (80) extending in the direction of the motor shaft (204) and over a Belt (200) is mounted from this drivable shaft (182), which by means of the sliding button (56) is displaceable in the longitudinal direction against the action of a spring (198) and which three Friction wheels (184, 186, 188) which, depending on the position of the slide button, optionally have two reel plates (192, 194) mounted on the shaft (182) can be brought into contact. 8. Tape recorder according to one of claims 2 to 7, characterized in that in the range of motion a projection (362) on the ejector head (62) el ·, by means of the slide button (56) displaceable component (178) is arranged, which is provided with a recess (360) in which the projection (362) only when the slide button is in the record-playback position can immerse. 9. Tape recorder according to one of claims 4 to 8, characterized in that by means of the second extension (340) of the lever (88) a component (372) provided with a bevel (374) displaceable against the action of a spring (388) transversely to the direction of movement of the lever (88) and that a pin (384) attached to the component is in the range of motion of a projection (390) on the ejector button when the component is displaced (62) is located. 10. Tape recorder according to one of claims 4 to 9, characterized in that a piece of the electrical leads (484) to the drive motor housed in a shielding housing (482) (202) is wrapped around it. For this purpose 4 sheets of drawings 109684/307 1QR?