JPS5894154A - Tape tension controller - Google Patents

Abstract

PURPOSE:To use the width of a cassette effectively, by selecting the position of a tension post in the cassette so that the effect on the other post can be reduced in a home-use VTR. CONSTITUTION:In an unloading operation, a ring pin of the lower end of a loading ring 26 abut to a pin latch 46a formed to the tip of a tension release plate 46 having a curved part. When the loading ring 26 turns, the release plate 46 is depressed on a ring pin 51 and is turned against a release spring 48 and the plate 46 depresses a release pin 50. A tension lever 44 turns around a lever shaft 41 together with a lever 37. Since the lever 37 is latched with a stopper pin 52 of a base, the tension lever 44 turns against a spring 45 by taking a relay pin 43 as a center and then, the unloading is finally finished.

Description

[Detailed description of the invention] Book! ! ! @ is Dave Tenjon? This is related to the 111iNJfM Direct, and its purpose is to reduce the size of the device in the fluorochemical device and to make effective use of the space available for storing cassettes (cassette loading dies), etc.

When considering the minute hand of the I stable VTR portab V, its evaluation is the image quality and the original ability of Hachisada sr! Of course, it is necessary, but the competition for miniaturization and thinning, which is called a direct installation and volume war, is being actively carried out, and unless cassettes are miniaturized and tape paths are miniaturized or promoted, significant weight reductions will occur. As shown in Figure 1,
Ll in 0 diagram showing Qi 1 pass of U loading)
is cylinder, (2) is capstan, (3) is pinch lobe, (4) to (6) is post, (7) is tension post, (8) is audio head, ζ9) is audio erase, (to) is erase head, 1111 #'i
Supply - V stand, am is winding - V stand. 1 itl
The tension post (7) is installed at the tip of the tension lever a-, which is rotated around the center of the loading ring a-〇 due to the cam shape of the outer skin of the loading ring a-〇. It performs the ν system #. 1lII is a tension release member that connects the rope ingrid jig O@ and the tension lever 1141. In this Uo-ting mechanism, the post (4) and pinch roller (3) are
It is housed within η and is lower than the ta-sha, Jl!
Since this method moves the pinch loaf (3) at the same time, the loading ring becomes large, and the tape path is very disadvantageous in terms of making the device more ho-shaped and #-shaped. On the other hand, the tape path shown in Figure 1g2 is the same as the inclination direction of the cylinder of the υ road jig shown in Igl1mK or the four tape inlets of the supply reel, and the output side 1rc twisting on the winding side occurs. Conversely, the inclination direction of the f/IJ cylinder is the tape exit direction on the take-up reel side, and the supply row y, 4
Both of them can basically be seen as rotation, but the pinch loaf of U loading shown in the sgt diagram 13) moves and increases the height in the cassette by one reference height. In contrast, the loading shown at 42 does not move due to the pinch loaf, and moreover, since the leading boss) (211 is higher than the standard height, the upper part of the cassette is placed and opened intermittently. Is it possible to make the device thinner or smaller by effectively utilizing the necessary space?
It will be done. Tenya sea bream 11*ll in this tape pass
is 6mJ'c if you consider it in conjunction with U loading)
Find the taI stirrup fulcrum of the tensile lever (to) so that the tension boss is shaved or abutted at a substantially right angle to the 4ii girl tape (2), and I! If you set the tension lever ratio to the forward position, the force will be hit as shown in Figure 2. Loading ring - outside #
Ten V by 1 Ogoyu! Release lever (goods) gaba f2@
to prevent rotation of the tension lever 4. In this case, as is clear from the warehouse drawing, the IIIFi cassette before loading of the tension boss 9 must also be biased toward the take-up reel stand a21 with respect to the opening of η, and this is true for other loading positions) This restricts the area occupied by 4 to C11 and the leading post @υ, which results in a significant reduction in the degree of self-confidence in the loading design. Unlike U loading, loading is performed by moving the loading ring (to) clockwise, so the tension boss)B
The position of is extremely important.

Therefore, the present invention aims to improve the position of the tension post in the cassette #C in this revised 9U loading so as to reduce the shadow # of the tension post on the post, thereby providing a compact VWI control device. When unloading the magnetic tape wound around the cylinder ◆ and storing it in the magnetic tape cassette, place the ten VM post that is to be placed on the magnetic tape in a predetermined position in the magnetic tape cassette! #Moveable tension post movement trajectory crab, Ten V! The first #recommended locus centered on the rotational fulcrum of the tension post holding member in which the tensions J and C are implanted in the lunsaku hammer spoon, and this first movement maw.
s and a second movement trajectory different from s.

The present invention will be explained below based on the drawings showing further embodiments. First, the first example of the present invention will be explained with reference to FIGS. 6 to 5.
lilriIt is driven by being decelerated by several tooth thicknesses using the loading force (not shown in the figure) as a driving source, and rotates in the clockwise direction during loading, and counter-w4 during unloading.
It rotates in the 1st direction. Naturally, this loading ring @vc is attached to the loading post (including the leading post) of the a-terminal (including the leading post) explained in Figure @2, or directly or indirectly.When loading is completed, #C is attached to these loading posts [2 The opening of the cassette is fixed at the position shown in FIG.

Outside the supply reel stand 111, a tension band (total) to which a scraping member such as VcFi FET is attached is partially wound. One end of the tension band is fixed to a band stopper, and the other end is fixed to a band holder which is movable (2) relative to the bottle installed in the first tension band. - is a band guide provided so that the tension VH pan (to) is uniformly 44 relative to the supply reel stand (11) when tension 3 is released.

The tension lever @1 is centered around lever -4υ v
It is movable and is biased in the counterclockwise direction by a tension spring.

144r1g2 tension lever, this tension lever is biased counterclockwise by a torsion coil V spring 141. This teleVH lever 14 is held in contact with the
A 41c ten VM embossing example is provided. The rod is a tension band that can be rotated around the fork shaft 147).
It is biased counterclockwise by a release spring and is locked by a locking pin. This tension release plate is configured to include a group of release bottles embedded in the second tension lever 144. Also, since the torsion coil ν spring is configured to have a greater elastic force than the tension spring (6), the normal tension lever #C is the same as the two tension levers C171HH.
Since it is integrated (2), it operates no different from a conventional integrated tension lever. Figure 4 shows the lowering motion before loading. First, the ring bin (51) is installed at the lower end of the loading ring, or the tension release plate is formed with a curved part at the tip during unloading. It comes into contact with the bottle locking ff1 (46&). Loading ring in history - or counterclockwise
rclIl1gll, the tension release plate is pressed by the ring bin (51) and moves clockwise against the release spring by 11!111111. Along with this, the tension release plate presses the release pin, so the tension lever 444d of I82 and the tension lever of 41 rotate clockwise around the lever shaft (4 illusion), but eventually the first tension lever Since the stopper bin (52) K is locked, the tension lever circle of 1g2 is then twisted around the center of the relay hinge I.
It rotates in the # needle direction against the spring, and finally unloading is completed at the position shown in Fig. 134. Ten V1M Pan V (To) is supplied along the band guide 141 17%
/ f! Separate from Iull outer pigeon surface. #Fast forward other than Ki'm44 raw mode, ten VB system at 4 years old @
Regarding the activation and deactivation of the device, there is no particular difference from the conventional method, so a description thereof will be omitted. Further, the operation of the tension lever wheel during loading is completely opposite to that during unloading, so a description thereof will be omitted.

Next, the @2 dormitory implementation of the present invention will be explained based on FIGS. 6 and 7. The same numbers as in the first embodiment indicate (b)-product names, and the same numbers as in the first embodiment. In this second embodiment, the second tension lever (55) is centered 1C1j on the relay bin 3 with respect to the tension lever H$1.
llvJ target 't'd16$, ne11): ffiA'hat141GK biases the clock in the striking direction, and the second ten V
The protrusion C53JL of the tension lever (53) is fixed to one end of the first tension lever (-).
This means that the tension lever (56) @2 is held biased in the opposite direction to the middle example. (54) is a hole provided in the first tension shield, into which one end of the torsion coil V spring is inserted. (55) is a tension post which is biased to the left by a release spring (56) and has a long hole (55m) (55b) K guide bin (57) (58)
is engaged to form a slide flTa. During recording and playback, the IC is applied in one direction by the torsion coil spring, and the biasing force 1 is applied to C and T by the magnetic tape.
Since it is a phrase, it is the 11th focus of the twisting carp ~ spring song *
i @ 144 without the first tension lever C force and the second tension lever (53) ri The tension lever due to unloading in Figure 87, which operates integrally
71(55) -Explain the work. Loading ring (
(to) is installed at the lower end of the bin (51) or ten V!
Slide the release plate (55) to the right. ten s/
! The bottle (to) is placed on the - side (550') of the lock release plate (55).
contacts, and moves along the diagonal Ifi section (550) K -c
The og section (55d)-@ rotates in the direction of the hour hand. f'
The second tension post (55) is attached to the board by J
Guided by the attached guide plate @, it moves in the manner of being rotated counterclockwise VC with respect to the balance VEX arm of #c1. Mataden V! ! Npando @ supplies - N units l
1l) can be spaced further apart. During loading, the tension post threshold moves again to the state shown in FIG. 6 while being guided by this guide plate (59).

The present invention can be carried out as described above, so that the II moving pile traces accompanying the loading and unloading of the tension post or the rotation support AK of the @1 tension lever all depend on it. That's not what I'm doing, so TenV! The design takes into account the original performance of the tension control Vi-, the design of the first tension lever, etc. for miniaturization of the device, and the design of the tension lever etc. to facilitate loading. Mboss F
The arrangement design within the cassette opening can be done independently.

This allows for a little more space in the placement of the loading post of the da in the cassette opening, as well as
The movement space of the tension lever is narrower than before, and there is also room for the arrangement with the reservoir d6h. There is also the effect that the Sekiguchi of the father cassette can be made smaller.

By configuring as in the HII second combination example, the screw 9
Since the direction in which the coil spring ν is applied and the direction in which the tension force F is biased by the tension ν are the same, the torsion coil spring t can be configured with an extremely weak force.

4.1113rIB Interchangeable Explanation 1g1 Figure 1 and Figure 2 show the conventional U-loading system tray flat rIB-143 Figure 1113rIB-143 shows the tape unloading V8 system #V in the first embodiment of the present invention! Figure 1g4 is an enlarged plan view of the main part showing the operating state of the machine, and #! 1 of Fig. 4 in Fig. 5, an enlarged plan view of the section! Section **Figure,
FIG. 6 is an enlarged flat view of part 41 showing the operating state of the tape tension control % filter in the second embodiment of the present invention;
FIG. 7 is an enlarged plan view of the main part showing the state Ill when the unloading is completed.

1111... Supply sea y unit, @... Cassette, of...
...e9C tape, (to)...tension post, yesterday...@1 tension lever, (2)...@2 ten V! Nrepa, Mouse...Torsion coil spring, (53)
... WG2's Tension Repa Daikin Yoshihiro Morimoto Figure F Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. A tension post that, during an unloading operation in which a magnetic tape with a cylinder width VC41iil is stored in a magnetic tape cassette, moves a tension post that presses against the 4i1i tape to a predetermined position KIIk of the SI tape cassette. The movement locus is the first movement @ II locus of 7 with the tension post installed in No. 11 in the tension operating state * centered around the rotation fulcrum of the companion tension post holding member, and this first Jlk-locus. A tape tension control device formed in one cil so as to consist of a second movement locus. λ A tension post holding member or a first tension lever that supports the free 4 of the tension band and is freely supported LaIvJ against the board and is biased counterclockwise by a tension spring, and a -4VC tension post flit is installed. The other end is connected to the first tension lever KLE! j Kanmezai ni Y
The tension lever is made up of a second tension band biased counterclockwise by a lever 72 for holding the lever, and the tension is increased by rotating the tension lever @2 in the clockwise direction during the unloading operation. Box)
(D Movement @ 41 trace is the first movement locus centered on the rotational fulcrum of the first tension lever, and the lever locking member VC @ present in the tension lever movement 4! A special W consisting of a second shift lE/l trace with the turning point of the second tension lever, which is caused by contact with the first tension lever, as the middle 8!
f Tape tension νmm%1i as described in the first product of claims
1[. 3. Plant a tension post at one end of the tension post holding member or the first tension post that supports the protruding end of the tension band and is supported uniformly against the board and is biased counterclockwise by a tension spring. The other end is self-U Hatakemi@
The first tension lever Ktal is freely supported and is biased in the hour direction by a spring for returning the lever to the second tension lever. By doing so, the movement locus of the tension post becomes (2) 411! of the tension lever of $1! Due to the locus of movement of the rest 1 centered on the I-junction point and the lever guide existing in the movement space of the second tension lever, the second tension lever is moved against the lever return spring to the first position. and a second movement locus generated by being guided while rotating in a counterclockwise direction with respect to the tension seam and V part.