DE2137939C3 - Magnetic tape machine with magnetic tape cassette - Google Patents

Description

_s In patent 2,041,977 a magnetic tape recorder is with

taken cassette cassette-side holding device so magnetic tape cassette described, the latter from directions in a known manner the reels
in position and the tape along the front of the cassette
keep tense and that with on the device

placed cassette on the device side known per se

consists of a cuboid cassette housing with a bottom surface, a cover surface and side surfaces, which enclose one or more reels carrying magnetic tape, the drive of the reels

Guide, drive and unlocking members so 25 and the magnetic tape by means of the device-side by engaging in openings of the cassette housing, bottom and / or cover surfaces and by allowing the cassette-side holding devices to release the receiving openings of the reel cores, the tape and the reels and the tape and mandrels and drive shafts takes place and the spools are held exclusively by the device-side, after the cassette has been attached to the device, for guiding and drive organs in their course in the drawing and reproduction of signals on the device-side depending on the cassette housing, scanning elements and at least one pressure roller according to patent 2 041977 , characterized by openings in the front side surface of the cassette, that the cassette-side retaining elements pass through the inside of the cassette along the front side directions from a common, position-changing surfaces extending magnetic tape, and borrowed Bremso, which are known per se rgan (26) for the 35 where in the cassette removed from the device kas spools and two jointly hinged holding devices in known linked levers (16, 21 and 17, 22), the spools in a fixed position and that Tape along the each of which a first lever (16, 17) keep tensioned relative to the cassette front and that when the cassette is mounted and placed on the brake element (26) in such a way that it is known in the art that with a given, through device- 40-sided guide, drive and unlocking elements-side unlocking elements (31) so engage in openings of the cassette housing that change in position of the braking element (26) both first the cassette-side holding devices, the tape lever (16, 17) are to pivot in the same direction, and the coils release and rela the tape and the spool and of which each with a first lever (16, 17) len exclusively through the device-side guide-connected second lever (21, 22) tiv to the 45 and drive elements in their course are held independently of the openings (7, 8) for the entry of the device-side cassette housing,
gen management bodies. (9, 10) into the cassette in which the holding devices on the cassette side exist

Are designed and arranged in such a way that in the case of two in the vicinity of the front side surface of the pivoting of the first levers (16, 17) the cassette pivotably mounted in the plane of the tape (23) either by the second lever (21, 50 tape tensioning levers and at least one in the vicinity 22) and outside the halo of the openings (7, the reel arranged reel braking member, 8) is to be held or the tape (23) is to be released when the cassette is removed from the device, the tape. Tension lever openings in base and / or cover 2. Magnetic tape cassette according to claim 1, the surfaces for the entry of device-side deflection rollers characterized in that the first levers (16, 55 encompass and the reels each have an L-shape and spring-loaded, a reel flange engaging at least one brake member by means of the at least 17) Direction of rotation are held non-rotatably. By means of the described lever is advantageously prevented that the coil during the transport of KAS ⁶⁰ sette are freely movable in the cartridge case and the magnetic tape unrolled, can be pinched or otherwise damaged. After the cassette is ready to move, the tape is guided exclusively by the tape on the device

are pivotably mounted in the cassette and the second levers (21, 22) are designed in the shape of a comma are and are each attached to the foot part of the L-shape of the first lever (16, 17) pivotably.

3. Magnetic tape cassette according to claim], characterized in that the braking member is a Spring-loaded, wedge-shaped brake pad slidably arranged between the coils (12, 13)

(26), the guide elements on the sloped sides a comparison ⁶ 5, so that compared to known KAS

toothing (27) having a corresponding toothing in at least one spool flange cooperates.

set device systems an optimal tape guidance is achieved so that the present cassette recorder system is capable of extremely error-free signal recording

ix

3 4

u id playback for studio and data applications adaptation of the moving elements to the E ^rfor "

is very suitable. requirements of the magnetic tape used and the

With the levers according to the main patent for educating spools in a state of rest and movement. Uas Malung the tensioned position of the magnetic tape and the gnetband can now be gripped or released by the lever gently spool holder when the cassette is not in operation, without a tape completely independent of the cassette housing, for example insufficient reel braking, when the cassette is running on the Device would not be paired. , eanz is achieved, since it is attached to the cassette housing by means of the fact that the first levers each have a _slight L-shape and are spring-loaded during operation of the cassette. pivotally influenced in footed. Furthermore, the arrangement of the cassette and the second passage points for the device-side belt deflection comma-shaped and each amfUD-roll is not chosen very favorably, so that the magnet part of the L-shape of the first lever can be swiveled open the device attached to the cassette. , _{R fi} dia wraps around the belt drive shafts, which promotes the 15 In a further advantageous development of the tirnn belt abrasion. object of communication can be the * ™ ^{m ™ T} Z ™ ™ n7eT-

From the DT-AS 1178 226 a cassette is loaded, wedge-shaped, ver between the reels

known to be with band guide organs, openings in the floor slidably arranged brake block, the on oen

and cover surfaces to the entrance of the clay head, clay-beveled sides a toothing ««, which

wave pressure roller and a pressure part and ao with a corresponding toothing m at least

with braking means for the reels and the tape, each of which interacts with a reel flange,

with tape damage during mounting of the cartridge I _n a further embodiment of the invention, the

should be prevented on the device. Because the band ratio of the spring load of the first lever and

however, in every operating state, the inlet opening of the braking element and the spatial ^allocation B ° ".Vn crossed, damage to the band when opening the first and second levers of the braking element and one set are unavoidable.

Gbm 1928 751 as well as from the publication th of the magnetic tape by the second

Sl Talk and Technical Tips «the Radio Corporation follows. This means that «J ^ 'J ^ Ä

ration of America, USA, from March 1962 are single of the magnetic tape by de B ^an ^^^^

Hch braking devices for reels in tape cassettes to remove the cassette from the Gerat orme

known, which are completely different from the magnetic tape 35 tape damage done in a gentle manner

Cartridges of the present invention are there because they can. . . , _fn i _O p _n Hen Be

»Ng mainly by means of the cassette-side details of the invention s- the following *

Cartridges of the present invention are there because they can. . . , _fn i _O p _n Hen Be

»Mostly by means of the cassette-side details of the invention s- the following *

Management facilities takes place. Spelling and /. Designation

The object of the present invention consists in the drawing shows the cassette bottom of the development of a cassette construction, whereby 40 F1 g. I a ^dr . ^fs . ^lcht _K ^ ^f _e . ^e ' ^ne no part of the cassette housing is in contact with the magnetic tape in the transport state of the cassette during movement, a Fig. 2 the cassette bottom according to g. Magnetic tape abrasion largely avoided and the j ^Cil ^^ ^"e _'ktivische operating position _view of the tape manufacturing technology simply in mass herzustel- Fig. 3 e.ne P" ^s P ^e ™ ^c T _11n ^ _1n enlarged transmission, easy-to-handle and reliable 45 clamping lever by FIGS. I and ζ is to be obtained in _h cassette. scale cassette bottom 1, of about

According to the invention, the object is thereby achieved. g ^ ^te £ _eitcnfUichcn 2 and 3

solves that the cassette-side holding devices of rectangular shape, ^ chen ^ ¹ _{from detc E} ck-

a common, changeable ar. be and ^el " ^{er Fro} ^ ^se ™ ^C \ l * _d near the corner parts

knew Bremsorgar »for the coils and from two 5 ° te.le 5 and 6 rounded η

articulated levers exist, undo - ^e ^ f _nd ^k ° ™ _m · " _{at a} low height around-

of which a first lever rushes relative to the brake organ Lck-nd circular - ^ = ^ _{11 die}

is mounted and arranged in such a way that with fronted openings 7 and Jj- _can .

given, by device-side unlocking devices Umlcnknlen len 9 and 10 _{l eru two cr}

induced change of position of the braking member 55 both of circular ridges U serving _GchUuscv ^b _{crsteifung. In}

first levers are to be pivoted in the same direction, and coils 12 and IJ una _f . _Ausspa rungcn

which with ⁸ a first lever connected close to second e wa ^^ ^f 3 ° _{to, etwu} L-conveyor

Lever relative to the openings for the entry of 37, ¹⁴ _n ^u "iJf _n ⁵ JiI ^ _{16 and} 17 each with a spiizc-

device-side guide elements in the cassette in the migc Bandspamihebcl 16 un J ^.

Forms and is arranged in such a way that at Ver 6 ° ren E idte. ^ 8 and 1 »^ ^ _krcisfön ,,

Pivoting of the first lever, the tape either see off η Ungen / _ausgchcn dcn FUH

by the second lever to grasp and outside gene, from the hcMcne diameter .st

of the openings is to be kept or the tape is to be freizu- rungsrandj ^ of ^ .α ^ ^ _χη ^ ^ _{kom fbr} .

I ^ c? the measure, articulated together ve, ^ ^ »^^ £ ^^^ ΐΐ V ^

tied tape tensioning lever for tape holder and a J « ^m g ⁿ ^""^ T ₈ reaches around and thus a

Independent braking member to the spool braking comparable to di '^' _{'s LCN 12 and} 13 extending

turn, there is the advantage of an expedient s.ch between aen,

Magnetic tape 23 from the device-side cover shown at the openings 37, 4 and 15 is held by the pin 31 a short distance in the direction of the front-side tensioning layer parallel to the front side surface 4. The end parts 18 and 19 of the lever 16 surface 4 shifted so that first the coils 12 and 17 reach into the vicinity of the Quermittclachsc 13 are released before the clamping levers 16 and 24 of the cassette bottom 1. The bearing pin of the Hc-5 17 through the brake 26 can be pivoted. When the cover is opened at 16, 17 near the end parts 18 and 19, the swiveling steps between the reels 12 and 13 and the cut-out take place in the reverse order, that is, the round about 15. directly to the Endteilcn 18,19 engages on the other a ¹ ^ 'is already taking place, as long as the brake cable of the recess 15 along off io 26 is not yet in the position in which the coil-assisted two-armed leaf spring 25 on a web of so that the levers are held in a rotationally fixed manner. This time shift 16, 17 can be kept in its first position. Counter ^dcs Funktionsabiauf it is appropriate Diüber of the leaf spring 25 is located between the mcnsionicrung the forces of the springs 25 and 29 so-flanges of the spools 12 and 13, a wedge-shaped ^WIC <^ ^Γ Längenvcrhältnissc and arrangements of the pad 26 with a toothing 27 at the Be 15 elongated holes 28 and 30 reached to each other. Characterized. As th partially indicated, is in each case a flange ^is assured that a sufficiently large band length of the coil ^ulcn 12 and 13 all around with a corresponding ^{DCN s} P can be peeled ^{12 and 13,} provided the teeth. ^Dam of manufacturing tolerance and 't ^BCIM pivoting of the levers 21 and 22 in position reasons, the respective other flange in ^{llire in Fl} S-2 shown second layer Bcschä a radius is made smaller to the tooth height. The * ° digung of the magnetic tape 23 is avoided.
Pad 26, whose height is selected ^dcr in Fig.2 operating position of the Kas-Kassctlcnhöhe shown slightly less than the ^ln, is provided with a Langloeh 28 ^{sette DCM G (™} t the tape extends around the geausgcbildct 23 and carries at the end of a tension spring 29, de- ratescit.gen deflection rollers 9 and 10 as well as at the other end to the webs 11. In ™ &} shown through the openings 13 to 15 in the shown first position is the ^a * <J «cassette passing through , gerätescitigen band brake pad 26 in Brcmsstellung, in which the coils 12 guide members along.

and 13 to the webs 11 and side surfaces 2 and 3 gc- ^A major advantage of the embodiments of the

are pushing, but is still slightly in the direction of the cassette enclosing the cassette ^{bottom 1}

Arrows, but not rotatable in the opposite direction ^since

are, since in this direction of rotation the tape 23 ^moves away from the cassette according to Fig. 2 is no element of the cassette

would wickcln. The Langloeh 28 overlaps ^{scllc dlc} tape guide affects,

in Fig. 1 easily with one in the cassette bottom 1 ^to ™ other is in the cassette relative to the

Sensitive elongated hole 30 through which a in Fi g. 2 gc belt drive shafts a technically cheaper belt

Zcigcr device-citiger pin 31 received when running on the device, since the tape drive ^{shafts are not}

Brachtcr cassette can reach through. The pin 31 35 are constantly wrapped by the tape. Furthermore,

can with a turn connected to a ^dam gcrätcseitigen 't a production engineering more convenient KAS

Top plate hinged rod be connected. training achieved.

After placing the cassette on the device, ^D ' ^{c in F} > 8 ·? wicdcrgcgcbcnc enlarged representation

Umlcnkrol! Cn9, 10 and winding mandrel 32, 33 in therefor '"" S ^d <* Band Spannhebds 16 clarifies the fact

in the box bottom 1 (and lid) provided that 40 because of the cramped space

Nungcn 7, 8. The reels 12 and 13 are centered, tape tensioning levers 16 and 17 the flanges of the reel 12

wherein the brake pad 26 in the direction of the front side ^{and 13 above and below} overlapping, with two im

tenflächec4 is pushed. The pin 31 occurs at the same distance from one another, through a web 34

early through the elongated holes 28 and 30. The connected halves 35 and 36 are formed.

Magnetic tape 23 is only slightly tensioned through the 45 the comma-shaped lever 21 attached to it

Bandspannhebcl 16 and 17 as well as the brake block 26 in one piece with one opposite the Broitc of the Ma-

hewn. Only during the closing process of a width that is not larger here is formed.

1 sheet of drawings

Claims (1)

Patent claims: 1, magnetic tape recorder with magnetic tape cassette, the latter consisting of a cuboid Cassette housing with a bottom surface, a cover surface and side surfaces, one or more Enclosing reels carrying magnetic tape reels, the drive of the reels and the magnetic tape by means of the device-side through the base and / or cover surfaces and through entrainment openings the coil cores of insertable mandrels and drive shafts takes place and after Attachment of the cassette to the device for recording and playback of signals on the device side Scanning elements and at least one pressure roller through openings in the front face of the cassette to the magnetic tape running inside the cassette along the front side surfaces pass through, whereby in the 4. Magnetic tape cassette according to claim 1, characterized in that the ratio of the spring load the first lever (16, 17) and the braking member (26) and the spatial assignment the first and second levers (16, 21 and 17.22), the braking member (26) and one the displacement of the braking member (26) triggering device-side pin (31) are chosen so that during the transfer the lever (16, 21 and 17, 22) and the braking member (26) in their position in which the magnetic tape (23) is held, the braking of the coils (12, 13) temporally after the detection and holding of the magnetic tape (23) is carried out by the second lever (21, 22).