CN1017476B - Magnetic tape cassette - Google Patents

Abstract

The present invention relates to a magnetic tape cassette which has a front opening (7), wherein the front opening is covered by a rotatable front cover (20) and a slide plate (9). When the slide plate is in a closed position, the slide plate is used for covering the front opening (7) at the bottom of a cassette shell(1), a section of magnetic tape (18a) crossing the opening and an opening hole (4) on a bottom wall (2). Two holes (15) are formed in the slide plate. When the slide plate (9) is in an opening position, the two holes cause the opening hole (4) to be exposed out. In the closed position, the slide plate (9) is locked by at least one latch (29) and one actuating piece (30), and the actuating piece extends into a groove (32) of the slide plate (9), and is adjacent to the back end of the groove.

Description

Magnetic tape cassette

The present invention relates to a kind of tape cassete, this box comprises: a box shell, and it has the first main casing wall parallel to each other and the second main casing wall, two sidewalls, open front of stretching into the first main casing wall backward of a rear wall, and one with this open front and the separated dividing plate of box shell inner chamber; Two strip winding wheel hubs that are supported between the two main walls, the axle that they can wind perpendicular to two main walls rotates, and the first main wall has two axis holes, can make the driving shaft and the interlock mutually of strip winding wheel hub of magnetic tape cassette equipment by them, tape is wrapped on the strip winding wheel hub, and the part of tape extends through open front; A protecgulum, it can move between detent position and open site, and contain a principal part, this principal part covers open front and extends through that part of tape of open front when protecgulum is in detent position, protecgulum also contains lateral lip, each sidewall of they and box shell is adjacent to each other, and is connected in above-mentioned sidewall rotationally; A slide plate, it is positioned at box shell outside, and comprise a principal part, the first main wall of this principal part and box shell is adjacent, slide plate is being directed sliding on the box shell, its direction is parallel to the first main wall and points to rear wall, and the self-enclosed POS INT that moves stops to the open site, on detent position, slide plate is locked in protecgulum on the detent position, and the principal part of slide plate covers open front, and open front at this moment extends back and enters into the first main wall, on the open site, protecgulum is released, thereby abdicates the path that leads to open front, and the rewinder of magnetic tape cassette equipment is inserted.

This class tape cassete is in US Patent specification 4,235,395(PHN9121) in existing the disclosure.The tape cassete of this V-2000 by name has an open front, and this opening is covered by the slide plate of the protecgulum of front and two main wall sides.On the detent position of protecgulum and slide plate, tape cassete is protected firmly, avoids foul and infiltrates and mechanical damage, and this damage is harmful especially to the tensioning portion of tapespan open front.On detent position, slide plate also constitutes padlock to protecgulum, thereby when the user handled tape cassete, protecgulum just can not open by mistake and not open.But because slide plate can freely move from detent position backward, after then moving behind slide plate, protecgulum just may bumped out unintentionally by the user, thereby that section of tapespan open front just may damage.Moreover, foul also may infiltrate the inside of tape cassete housing, because under certain conditions, the inside of this known tape cassete seals very not well at the opening part of two main walls.

Target of the present invention is a kind of tape cassete that is illustrated in that section in beginning of design, makes it can complete closed, and the parts that are used for sealing tape cassete effectively padlock on detent position.

For reaching this purpose, characteristics of the present invention are: second main wall not perforate in its gamut, and principal part and this wall of protecgulum is close on the detent position of protecgulum, when slide plate is in detent position, the extend back axis hole that surmounts the first main wall and of the principal part of slide plate with on this port lid, and the principal part of slide plate has two holes, above-mentioned opening is exposed in these two holes when slide plate is in the open site, slide plate is pinned by a padlock spare when detent position at least, this padlock spare comprises a door bolt and an actuation component, the principal part of slide plate is provided with an opening or groove, this groove extends back from the leading edge of slide plate principal part, and the teat of actuator stretches into the rear end of opening or groove when slide plate is in detent position.

So, just make tape cassete complete closed always on the limit of the second main wall, and can it be sealed by slide plate in the edge of the first main wall.Slide plate is pinned by a padlock spare, and it also pins protecgulum by this slide plate.The door bolt separated from one another of padlock spare and actuation component make the structure of the non-padlock part on the magnetic tape cassette equipment more free.The opening of slide plate principal part or the advantage of groove are that these non-snap lock feature can make the actuation component action by slip, thereby make magnetic tape cassette insert magnetic tape station.The shape of door bolt can ad hoc adaptive padlock function, so that slide plate reaches padlock more reliably.In practice, actuator and opening or groove work together, thereby have prevented that in fact slide plate from having prevented that also opening by mistake of protecgulum from opening; Slide plate can only be cancelled padlock with the trip gear in the magnetic tape cassette equipment.When tape cassete was used, the slide plate that is in the open site occupied any unnecessary space of magnetic tape cassette equipment hardly.

The tape cassete of making according to the present invention is applicable to audio frequency, video and datalogger.Because design of the present invention can apply to little tape cassete especially effectively, so the present invention is specially adapted to do the tape cassete of digital audio record, in this class tape cassete, tape is to be wrapped on the drum of a rotation.

The characteristics of the scheme that the present invention is the most desirable are the free ends of door bolt and the close elastic arm of actuator, the other end of this arm is connected on first principal arm, its free end can move along the direction that is basically perpendicular to first principal arm, and slide plate is pinned effectively by padlock spare.Moreover, the trip gear of magnetic tape cassette equipment can also overcome elastic force and lift actuator, thereby makes door bolt shift out the padlock position.Elastic arm can also can be decided the elastic force that acts on door bolt by the length of arm or the selection of thickness are determined by partial structurtes in the arm and pit.

The characteristics of another desirable scheme of the present invention are: door bolt, actuator and elastic arm and the first main wall form an integral body, this just makes the padlock spare and the first main wall integrally link together, thereby makes the resolution element decreased number that adopts in the tape cassete of making according to the present invention.

The characteristics of another desirable scheme of the present invention are: actuator has circular or PYR side, fasten with a bolt or latch then rectangular, and actuator is adjacent with door bolt on the direction vertical with the skateboarding direction, this side view of actuator has guaranteed the level and smooth combination between the trip gear of it and magnetic tape station, and the shape of adjacent door bolt then is adapted to the padlock function especially.

If on the detent position of slide plate, the wall in a hole on the door bolt and the inside surface of slide plate fits, thus with the slide plate padlock on detent position, then be very favourable.So just guaranteed on the detent position of slide plate, can not touch breechblock.

But the present invention also has a desirable scheme, is characterized in that protecgulum has a groove on its principal part edge, and when protecgulum was in detent position, the opening or the groove of this groove and slide plate principal part aligned.If tape cassete is inserted magnetic tape station in the mode of sliding, then trip gear can enter in the opening of slide plate principal part or the groove slide plate is triped, and is not subjected to the obstruction of protecgulum, and this is the strong point of this scheme.

If the sidepiece of slide plate and principal part are pressed close to, and adjacent to each other with the sidewall of box shell, in the groove of adjacent wall, slide respectively again, then the guiding of slide plate can be satisfactory.These grooves also are connected to slide plate on the box shell effectively.In this part, also have a desirable scheme, be characterized in that slide plate lateral lip of its sidepiece and protecgulum when detent position matches, and is locked in protecgulum on the detent position with this.Utilize the sidepiece of slide plate to pin protecgulum, or else need other special parts for this reason.

Referring now to accompanying drawing in detail, two schemes of the present invention are described in detail for example.In the accompanying drawings:

Fig. 1 is that it shows protecgulum and slide plate on the detent position by the skeleton view of the tape cassete of the present invention's design.

Fig. 2 is the basiscopic perspective view of the tape cassete among Fig. 1, and a part has wherein been cutd open, and it expresses protecgulum and slide plate on the open site;

Fig. 3 is along the cut-open view that the III among Fig. 2-the III line is got, and draws in the ratio of having amplified, and it has represented the slide plate of padlock at detent position;

Fig. 4 is along the cut-open view that the IV among Fig. 2-the IV line is got, and it has represented to be in the slide plate with Fig. 3 same position;

Fig. 5 is that it expresses the actuator of padlock spare along the cut-open view that the IV among Fig. 2-the IV line is got, and this part is lifted by the trip gear of magnetic tape cassette equipment;

Fig. 6 is along the cut-open view that the III among Fig. 2-the III line is got, and it is expressed by the slide plate that is latched in the open site of padlock spare;

Fig. 7 is the basiscopic perspective view of another program of the tape cassete made according to the present invention, has cut the part of tape cassete among the figure, and this figure has represented at the protecgulum of open site and slide plate;

Fig. 8 is along the cut-open view that the VIII among Fig. 7-the VIII line is got, and draws in the ratio of amplifying, and it has represented to be locked in the slide plate of detent position.

Tape cassete shown in Fig. 1 and Fig. 2 contains a box shell, this shell have two parallel be the main wall of rectangle basically, i.e. first main wall 2(Fig. 2) and second main wall 3(Fig. 1).Main wall 2 constitutes the diapire of box shell, and has the axis hole 4 of two circles, Fig. 2 only to express a hole on the right, another not boring of main wall 3.Box shell 1 also contains two sidewalls 5 and a rear wall 6, and an opening 7 is arranged in front, and this opening extends back in the bottom and enters the first main wall 2, and is separated by the inside of a dividing plate 8 with itself and box shell 1.A slide plate 9 can slide on the first main wall 2, and has principal part 10 and two sidepieces 11, principal part 10 be close to the first main wall 2 above, the plane parallel of its residing plane and this main wall; Sidepiece 11 and principal part adjacency, and press close to celestial wall 5 respectively.All there is a convex tendon 11a inboard of each sidepiece 11, and the mode that it can slide is assemblied in the groove 12 in adjacent sidewall 5 outsides, thereby is slide plate 9 guiding, and simultaneously slide plate is connected on the box shell 1.Like this, slide plate just can slide with respect to the box shell between a detent position and an open site.Dot-and-dash line among Fig. 2 is represented detent position, has in fact covered the open front of box shell at this position upper slide, and the solid line among the figure is represented the open site, and open front this moment is in fact exposed.The winding tape apparatus of magnetic tape cassette equipment (not drawing among the figure) can be put into wherein.A projection 13 is arranged in the inboard of slide plate 9, and it can slide along the direction perpendicular to rear wall 6 in a groove (not shown) of the first main wall 2, is also connecting a termination of tension spring 14 on the projection 13, and the other end of this spring is fixed on the inboard of the first main wall 2.This tension spring 14 has formed an elastic device, and it pushes slide plate 9 towards detent position.Two holes 15 are arranged in the principal part 10 of slide plate 9, and the hole 4 when they are in the open site at slide plate in (Fig. 2) and the main wall 2 is coaxial, enters the tape cassete shell thereby make the driving shaft (not shown) of magnetic tape cassette equipment be passed hole 4.

In the inside of box shell 1, two strip winding wheel hubs 16 and 17 are supported between main wall 2 and the main wall 3, and they can be around the axle rotation perpendicular to this two main wall.Tape 18 is entangled on the wheel hub, and one section 18a of tape crosses over open front 7 with tightening.Protruding cylinder curved surface conduction band frame has been installed at the two ends of dividing plate 8, can see that conduction band frame on the left side among Fig. 2, the part of the adjacent wall 5 of each conduction band frame 8a and front thereof has all been drawn a circle to approve a passage 19, and tape 18 passes through open front 7 through passage thus from the inside of box shell 1.When tape cassete time spent not, promptly when it does not insert magnetic tape station, open front 7, tape passes through that section 18a of this opening, and the front of two passages 19 all covers by protecgulum 20, and this lid has the principal part 21 of a strip, and there are two lateral lip 22 at the two ends of principal part.Lateral lip 22 is pivotally connected on the corresponding box shell side wall 5 by bearing pin 22a.As shown in Figure 1, the principal part 21 of protecgulum has the flange or the protruding tongue 21a that erect along its coboundary, when current cap seal closes, this flange securely fit with the second main wall 3 of box shell 1 and with its coplane.Similarly, when current cap seal closes, its side flange 22 also closely paste mutually with the sidepiece 11 of slide plate 9 and with its coplane.Like this, tape cassete is just by complete closed.

Be positioned at box shell 1 inner and adjacent with main wall 3 be the keep plate 23 of a strip, it can move in the plane that is parallel to main wall 3 and be pressed to rear wall 6 by a spring 24, this spring is being pressed dividing plate 8.When not using (tape cassete), keep plate 23 is pressing down the circular surface of strip winding wheel hub 16 and 17 to prevent the wheel hub rotation in the influence of spring 24, has guaranteed the still open front 7 of leap box shell of tape 18 thus with tightening.Across the box shell, and it has right angle side wing 25 in the place of contiguous these two sidewalls to keep plate 23, and a lug 26 is all arranged on each side wing from a sidewall, and lug stretches into adjacent sidewall 5 by an opening (not shown).Lug 26 can slide in these two openings, and the sidepiece 11 that is in the slide plate 9 of detent position covers.So, lug 26 is just stiff when slide plate 9 sealings.But, when slide plate slides backward when entering among Fig. 2 the open site shown in the solid line, lug 26 just reveals, and can and the edge 22a of the side direction bead 22 of protecgulum 20 match, thereby when protecgulum 20 forwarded the open site to, keep plate 23 just had been with by flange 22 and is being travelled forward.Like this, when protecgulum 20 sliped off, keep plate 23 was just thrown off from wheel hub 16 and 17.

As shown in Figure 1, on the detent position of slide plate 9, the rib 22b of the rib 11b of slide plate side 11 and the adjacent side lip 22 of protecgulum 20 near, thereby protecgulum is locked on the detent position.When sliding among Fig. 2 the open site shown in the solid line behind the slide plate 9, the sidepiece 11 of slide plate moves backward and is decontroling the flange 22 of protecgulum, and it is rotated, thereby makes protecgulum trip and can open.

In the first main wall 2, be provided with two padlock spares 27, that of the right of only having drawn among Fig. 2.These two padlock spares 27 are about becoming mirror-symmetrical perpendicular to main wall and perpendicular to the plane on the plane of the shaft axis that comprises wheel hub 16,17, and and wheel hub 16,17 equidistant.Padlock spare 27 and main wall 2 are unified into an integral body, and each padlock spare all is arranged in a mating holes 34 of this wall, and its is near corresponding sidewall 5, and and the rear portion of the passage 19 that surrounds of sidewall not far from one another.Two padlock spares 27 respectively comprise an elastic wall 28, and this wall is arranged in the plane of main wall 2, and stretch out along slide plate 9 travel directions.Terminate to behind this elastic arm on the main wall 2, its front end has been adorned a door bolt 29(Fig. 3) and an actuator 30(Fig. 4), actuator on arm 28 side by side near, form an all-in-one-piece projection, and these two parts all on (low) side, are distinguished as shown in Figure 3 and Figure 4 outside principal arm from the planar projections of the first main wall 2.Be at the slide plate shown in Fig. 39 under the situation of detent position, the door bolt 29 of each padlock spare all connects with the end wall 31a kissing of a mating holes, this hole is to be formed on the inside surface of slide plate 9 by groove 31, this groove 31 extends along the direction perpendicular to rear wall 6, thereby slide plate 9 is locked on the detent position.In the open site of slide plate 9, the preceding rib 10a of the principal part 10 of door bolt 29 and slide plate 9 matches, as shown in Figure 6, and so that slide plate is locked on this position.For guarantee these two functions correctly carried out with slide plate 9 securely padlock in detent position and open site, the front and rear surfaces of the door bolt 29 of each padlock spare, i.e. the surface that cooperates with slide plate, all two parallel planes and the main wall 2 with slide plate meets at right angles.Door bolt preferably has rectangular shape.At the detent position of slide plate 9, the actuator 30 of each padlock spare 27 all protrudes in the cooperation notch 32 of principal part 10 of slide plate 9.Notch 32 extends back from the preceding rib of slide plate 9, and the rear portion of actuator 30 and the notch of slide plate when detent position is very near from getting.When tape cassete is sent into magnetic tape station, all put in the parts of triping that are contained on the machine in each notch 32, the pin among Fig. 5 33 for example, when magnetic tape cassette travelled forward, corresponding actuator 30 was fitted and is also slipped over the parts of triping to be lifted.Actuator 30 has the side of a slyness, therefore can slip over the parts of triping smoothly.The bending that the elastic arm 28 of padlock spare 27 is produced carries away the door bolt 29 of these parts from the groove 31 of slide plate 9, slide plate is triped, and it should be noted that the elastic force of arm 28 can be determined with the length of selecting this arm and the method for thickness.Moreover, also what deserves to be mentioned is, owing to utilized arm 28 and 29 and actuator 30, just or else needed the parts that add for padlock slide plate 9.

As said, when tape cassete time spent not, slide plate 9 is in detent position and in fact covers the perforate 4 of box shell wall 2.In fact, it has also covered the open front 7 of box shell, thereby one section 18a of tape 18 just can not be approaching from the downside of box shell.In front, the principal part 21 of the protecgulum 20 that of tape section 18a is closed covers, and on top because the upper flange of protecgulum 20 or the close applying between convex tendon 21a and the box shell master wall 3 have formed together effectively protection again.Padlock spare 27 has guaranteed that slide plate 9 can not move when the position that door bolt 29 is in shown in Fig. 3.When magnetic tape cassette is not in magnetic tape station, slide plate 9 is triped be very difficult, be on the one hand because be provided with two padlock spares.Be because actuator 30 is in the quite narrow groove 32 on the other hand, very difficult with finger or these two actuators of nail pressing.Like this, the magnetic tape cassette of making according to the present invention just provides the protection of height, can prevent that the opening by mistake of limited slip plate 9 open.The padlock of slide plate 9 also makes protecgulum 20 also be lockable, so protecgulum also can not open by mistake and opens.The interlocking of protecgulum and slide plate also has additional advantage, and promptly keep plate 23 can not misoperations, and it just not rotated when this had just guaranteed not want to allow wheel hub rotate.

Like this, when 20 sealings of slide plate 9 and protecgulum, the tape cassete of making according to the present invention forms the integral body of a complete closed, and it is subjected to effective protection, can prevent the infiltration of dust and foul, also can eliminate to cause the mechanical influence that tape damages in the box.It shall yet further be noted that because one section 18a of tape is in exposed locations, so the time spent more should not protected it well at tape.As noted earlier, when magnetic tape cassette inserts in the magnetic tape station, this section 18a of tape must be emerging in the position of the open front 7 of box shell, so that the rewinder of magnetic tape station refunds tape 18 and it is entangled on the drum of magnetic tape station, thus just may be with tape reading of the rotating magnetic head in the drum or record band.Magnetic tape station with the drum work of rotating can be a video recorder, also can be with the form record of numeral or the audio frequency or the datalogger of replay signal.Concerning the one class registering instrument of back, only need quite short tape.The magnetic tape cassette of making according to the present invention is specially adapted to this class and uses, because the parts that adopt can be very compact.

For magnetic tape station that magnetic tape cassette is packed into, may need tape is inserted in the loader mechanism of magnetic tape station, in this case, can forwardly be so-called " mailbox " opening of magnetic tape station installing.When inserting magnetic tape cassette, the parts of triping of magnetic tape station enter notch 32(Fig. 1 of tape cassete slide plate 9 by the depression 21b of principal part 21 lower edges of tape cassete protecgulum 20), when protecgulum was positioned at detent position, this depression 21b and notch 32 just in time alignd.The parts of triping of magnetic tape station can be contained in the loader mechanism regularly.It should be noted that if the parts of then triping can be provided with rib in the bottom of loader mechanism without bearing pin 33, magnetic tape cassette then inserts in this loader mechanism.When inserting, the parts of triping of magnetic tape station, as shown in Figure 5 and as previously mentioned, the elastic force that overcomes arm 28 lifts the actuator 30 of padlock spare 27, arm 28 be out of shape thus and from the groove 31 of slide plate 9 disengaging padlock plush copper 29, slide plate is triped.At this moment the parts 33 of triping are close to the aft bulkhead of slide plate 9 notches 32.Thereby slide plate 9 parts 33 of being triped were shifted onto on the position of back when tape was further inserted, so that the bottom of the open front 7 of box shell 1 is unlikely to be covered.During this action, spring 14 further tensionings.When their during through the preceding rib 10a of the principal part 10 of slide plate 9, door bolt 29 is crossed rib 10a and is fallen into the position shown in Fig. 6 suddenly under the effect of the elastic force of the arm 28 of padlock spare 27.On this position, two door bolts 29 have guaranteed that slide plate 9 correctly locate also padlock on this position.Like this, when slide plate was in the open site, the parts of triping just no longer bore load, thereby they can be got back on the position of magnetic tape cassette work.On last position, slide plate is being close to the epirelief part of the first main wall 2, and not far from one another with rear wall 6.On this position, the path near the perforate 4 of the first main wall 2 has been abdicated in hole 15.Like this, the driving shaft of magnetic tape cassette equipment just can easily engage wheel hub, and perhaps magnetic tape cassette can be lowerd it by loader mechanism, installs on the driving shaft.

Just as said, protecgulum 20 leans on the setback of slide plate and trips.Because moving downward of magnetic tape station loader mechanism, protecgulum is opened on position shown in Figure 2, because the lateral margin 22 of protecgulum has overcome the elastic force of spring 24, keep plate 23 travels forward, and wheel hub 16 and 17 is loosened.At this constantly, the take-up spool of magnetic tape station or similar device have protruded into the open front 7 of box shell, can pull out tape 18 1 and enclose and it is wrapped on the drum from tape cassete.This just can record tape then and there or will write down from the tape 18 again and release.

When magnetic tape cassette was extracted out in magnetic tape station, the actuator 30 of padlock spare 27 was lifted by the release member 33 of magnetic tape station again, makes the preceding rib 10a on the principal part 10 of fastening 29 disengaging slide plates 9 with a bolt or latch, thereby slide plate is triped.Then, spring 14 makes slide plate turn back to Fig. 3 and position shown in Figure 4, and on this position, the slide plate door bolt is automatically pinned by 29.Before slide plate 9 returned detent position, protecgulum 20 put at gravity and spring 24 under the synergy of power of keep plate 23 and turns back to detent position.When slide plate turns back to detent position because the effect of the sidepiece 11 of slide plate 9, protecgulum 20 again by padlock on detent position.

Many parts in the alternative plan shown in Fig. 7 and Fig. 8 have all showed in first scheme, and these parts have (with first scheme) identical label.In alternative plan, each in two padlock spares 35 all comprises an elastic arm 36, has installed 37 and actuators 38 of a door bolt on it, and being shaped as of door bolt is square, and actuator is positioned on the door bolt 37 and has the side of taper.At the detent position of slide plate 39, the wall that each door bolt 37 all is close to the hole 40 of plate 39 inside surfaces, and pin plate 39, actuator 38 protrude in the mating groove 41 on the plate 39, and the direction of the groove 32 in the direction of this groove 41 and first scheme is identical.Hole 40 is positioned on the diapire of groove 41, the preceding rib of another hole 42 contiguous slide plates 39 on this diapire.In the open site of slide plate 39, the wall in door bolt 37 next-door neighbour holes 42 also pins slide plate.The sidewall of groove 41 is preferably diverged into tubulose and is pointed to the principal part 21 of protecgulum 20, and principal part 21 also is provided with a groove 21b simultaneously, and this groove and groove 41 align.When inserting magnetic tape cassette, as shown in Figure 7 and Figure 8, the dropout part 33 of magnetic tape station enters groove 41.Each dropout part all lifts actuator 38, and actuator then is arranged in the groove 41 of adjacent bores 40.The preceding rib of the set bar (not shown) adjacent plate 39 on the magnetic tape station also pushes plate to rear wall.Because the existence of this power, actuator 38 and its tapered side be the edge of slide through holes 40 smoothly just, and arm 36 deforms, till the wall in actuator 38 disengagement holes 40.This just makes slide plate 39 free padlock with latch fitting 35.When magnetic tape cassette was inserted inwards again, the sideslip of plate 39 was crossed the top of actuator 38, up to door bolt 37 and actuator 38 till the effect whereabouts of the elastic force of arm 36 hand-hole 42.On this position of plate 39, as shown in Figure 7, door bolt 37 has guaranteed the correct location of slide plate 39 and with its pinning.When tape cassete was pulled out from magnetic tape station, each actuator 38 was all lifted by the dropout part 33 of magnetic tape station again, thereby made door bolt 37 and actuator 38 throw off the wall in hole 42 to pin plate 39.Spring 14 makes plate 39 return to position shown in Figure 8 then, and on this position, when door bolt 37 and actuator 38 when falling into hole 40, plate 39 just automatically is lockable.Because actuator 38 is arranged in the groove 41 that is rather narrow, and it does not stretch out the plane of slide plate 39, just be difficult to press actuator 38 with finger or nail, thus tape cassete outside machine the time, it is very difficult that slide plate 39 is triped.Therefore, this scheme of the tape cassete that makes according to the present invention also has very high protective value, can prevent that opening by mistake of limited slip plate 39 open.

In another scheme (not shown), do not adopt two padlock spares 27 or 35, only used a padlock spare 27 or 35.Also can slide plate be locked on the detent position a door bolt 29 or 37 with each padlock spare.Slide plate can remain on the open site by means of one or two dropout part of magnetic tape station.Also can make slide plate remain on the open site with bearing pin, this have said that when tape cassete inserted, bearing pin pushed slide plate to rear wall when the alternative plan among Fig. 7 and Fig. 8 is illustrated.

Claims (16)

1, a kind of tape cassete, include: a box shell (1), this box shell has the first main wall and the second main wall (2 that is parallel to each other, 3), two sidewalls (5), a rear wall (6), an open front (7) that extands rearward to the first main wall (2), one with open front and the inner separated dividing plate (8) of box shell; Two wheel hubs (16 that are supported between the two main walls, 17), they can be around the axle rotation of vertical main wall, the first main wall (2) has two axis holes (4), the driving shaft of magnetic tape station can mesh by them and wheel hub (16,17), and tape (18) is around wheel hub (16,17) on, a section (18a) wherein passes through open front (7) and extends; A protecgulum (20), can between detent position and open site, move, and it has a principal part (21), this principal part, cover preceding perforate (7) when being in detent position and pass through that section tape (18a) that open front is extended at protecgulum (20), protecgulum also has lateral lip (22), and each sidewall (5) of this flange and box shell (1) is contiguous mutually, and is connected in above-mentioned sidewall rotationally; A slide plate (9 that is positioned at box shell (1) outside, 39), it has a principal part (10), and the first main wall (2) of this principal part and box shell is adjacent, slide plate (9,30) can be parallel to the direction of the first main wall in box shell upper edge and slide to rear wall (6) guiding from detent position.On detent position, slide plate is locked in detent position with protecgulum (20), and slide plate (9,39) principal part (10) covers open front (7), this opening extands rearward to the first main wall, slide plate slides on the open site with the padlock of removing protecgulum (20) and abdicates towards the passage of open front (7), the side belting of magnetic tape station is inserted, it is characterized in that the second main wall (3) does not all have the hole in its gamut, the principal part (21) of protecgulum (20) is on detent position and second main wall (3) close proximity, slide plate (9,39) principal part (10) when detent position, extend back cross on the first main wall (2) the axle (4) hole to cover them, and slide plate has two holes (15), when slide plate (9, these two holes go out the Kong Lu (4) of above-mentioned main wall when 39) being in the open site, with at least one padlock spare (27,35) with slide plate (9,39) padlock is on detent position, padlock spare has a door bolt (29,37) and an actuator (30,38) principal part of slide plate (10) is provided with an opening or groove (32,41), they extend back from the leading edge (10a) that has of slide plate (9,39) principal part (10), when slide plate (9, when 39) being positioned at detent position, actuator (30,38) extend into close end thereafter in the groove (32,41).

2, the tape cassete described in claim 1 is characterized in that door bolt (29,37) and actuator (30,38) near an elastic arm (28,36) free end, the other end of this arm are linked on the first main wall (2), and its free end can be substantially perpendicular to the direction motion on the plane of the first main wall.

3, the tape cassete described in claim 2 is characterized in that door bolt (29,37), actuator (30,38) and elastic wall (28,36) and the first main wall (2) form an integral body.

4, the tape cassete described in claim 2 or 3 is characterized in that elastic arm (28,36) stretches to rear wall (6) from its free end.

5, the tape cassete described in the arbitrary claim among the claim 2-4 is characterized in that actuator (30,38) has profile slick and sly or taper, door bolt (29,37) rectangular, actuator on perpendicular to the direction of slide plate (9,39) direction of motion and door bolt adjacent.

6, the tape cassete described in claim 5 is characterized in that actuator (30) is positioned at the next door of the door bolt (29) on the elastic arm (28), and its direction is parallel to slide plate (9).

7, the tape cassete described in claim 5, it is characterized in that actuator (38) be positioned at door bolt (37) above, the two forms an all-in-one-piece projection on elastic arm.

As the described tape cassete of arbitrary claim of claim 5-7, it is characterized in that on the detent position of slide plate (9,39) that 8, the wall (31a) in the hole (31,40) of door bolt (29,37) and slide plate inside surface matches, and slide plate is locked in detent position.

9, as at the tape cassete described in the claim 8 and 7, it is characterized in that hole (40) is on the diapire of slide plate (39) groove (41).

10, the tape cassete described in the arbitrary claim in front is characterized in that in the open site of slide plate (9), and the leading edge (10a) of door bolt (29) and slide plate matches, and slide plate is locked in the open site.

11, the tape cassete described in claim 9, it is characterized in that open site in slide plate (39), the wall in another hole (42) in the diapire of door bolt (39) and skateboards slot (41) matches, and slide plate is locked in the open site, and this another hole is near the leading edge of slide plate.

12, the tape cassete described in the arbitrary claim in front, it is characterized in that on the limit of protecgulum (20) principal part (21) groove (21b) being arranged, when protecgulum (20) when being in detent position, this groove and slide plate (9,39) opening of principal part (10) or groove (32,41) align.

13, the tape cassete described in the arbitrary claim in front, it is characterized in that slide plate (9,39) have the sidepiece (11) that links to each other with principal part (10), said side abutment is followed each sidewall (5) of box shell (1), and can do incorgruous motion in the groove in the adjacent sidewall (12).

14, the tape cassete described in claim 13 is characterized in that on the detent position of slide plate (9,39), and the lateral lip (22) of sidepiece of slide plate (11) and protecgulum (20) matches, this cover lock on detent position.

15, the tape cassete described in claim 14 is characterized in that working as slide plate (9,39) when move in the open site, and its sidepiece (11) is removed from the lateral lip (22) of protecgulum (20), and protecgulum is triped, and is opened.

16, the tape cassete described in the arbitrary claim in front is characterized in that the degree of depth of opening on the slide plate (9,39) or groove (32,41) is concordant with the actuator (30,38) that stretches in opening or the groove at least.

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