JPS5919188A - Ribbon cassette - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a ribbon cassette for typewriters and writing mechanisms of printing machines, computers and the like, comprising a winding mandrel for used ligatures and a ribbon cassette for use in typewriters and writing mechanisms of printing machines, computers and the like.
, l, and a ring-shaped brake member having a plurality of legs arranged in a 7-shape is disposed around the original note dispenser. One leg of the section is held in a projection of the cassette casing, and the ribbon is guided around the free end of the other leg.

+) The ylff cassette is exposed to vibrations during transportation, installation into a machine, and even during writing operations.

When the machine's type or code carrier member is struck against the Hζn during writing operations, the corresponding H? One sudden forward pulling force is applied to the pin. The rotational movement of the unwinding mandrel must therefore be braked in such a way that the ribbon always passes under tension in front of the type or code carrier of the machine; must be at a uniform height in front. United States Patent No. 4034
In the ribbon cassette known from the 935 specification, the braking of the unwinding mandrel provides contact with the ribbon reel winding or the supporting disk for the reel reel by the foam layer or the foam layer, i.e. This is done by pressing an IJ, 37-inch reel or support disc against the part. A disadvantage of this known device is that the damping pressure of the foam lever acts unevenly and, moreover, as the foam ages, it becomes impossible to obtain a uniform damping action over a long period of time.

Glue-dan cassette for typewriters and writing mechanisms of printing machines and the like, also known from ISO 8002752, for driven winding mandrels and unused ribbons In those having an unwinding mandrel, for the purpose of braking the unwinding mandrel, around an extension or an additional part provided on the unwinding mandrel,
A guided elastomeric belt is wrapped around the stationary bottle or protrusion enclosure. Further, there are known cassettes that use a ring-shaped brake member having a plurality of legs arranged in an approximately V-shape and arranged around the unwinding mandrel, in which case one leg is attached to the cassette casing. is held in the protrusion of the other leg, and the resene is guided around the free end of the other leg. The braking device for the unwinding mandrel of this known glue-zen reel is made of thin spring steel and is such that, when the ribbon is pulled, a ring-shaped brake member unwinds and exerts a braking action on the mandrel.

An object of the present invention is to provide a beam sensor cassette in which the brake member is not only easy and inexpensive to manufacture, but also provides high braking action.

According to the invention, this problem is solved in a ribbon cassette of the type mentioned at the outset, in which the ring-shaped brake element is formed from a flat plastic element, and the annular part of the brake element is located opposite to the leg. This problem was solved by forming a reduced cross-sectional area on the surface.

According to an advantageous embodiment of the invention, the cross-sectional area reduction section can be arranged in an extension of the angle bisector between the two legs. Furthermore, the reduced cross-section portion may be a wedge-shaped notch formed radially inwardly from the lateral surface of the annular portion of the brake element.

The ribbon guided around the bottle at the free end of one leg of the ring-shaped brake member is an unused piece of ribbon. It is held in place at the bottle so that it does not slip under the legs when it is pulled sharply from the bottle (as would happen on the smooth metal surface of a brake member made of wire). Further +) 7I; The manufacture and use of the brake element of the cassette is such that it is formed as a substantially flat element and provides a good braking effect on the unwinding mandrel due to its reduced cross-section. This is facilitated by Therefore, there is no need to swing the wire from a plane parallel to the ribbon reel to the lower side of the reel, unlike in structures using known wires.

The idea underlying the invention is to form the annular part of the brake member by means of a notch or a reduced cross-section into two approximately semi-circular brake jaw segments movable toward and away from each other, the ends of which are joined by a recess. The segment holding the loaded leg acts like a pivotable brake jaw that pivots away when the lyxo is pulled, thereby releasing the braking action.

According to an advantageous embodiment of the application of this principle, the wall of the annular part of the brake element surrounding the unwinding mandrel is provided with a small addition or projection, and the unwinding mandrel is provided with a small extension or projection.
The portion of the circumferential surface adjacent to the aperture or protrusion is formed with an axially oriented southern, knurled or wavy surface.

Then, in the rest position of the ribbon, the aforesaid extension or protrusion is fitted into a recess, preferably a narrow tooth or notch, in the unwinding mandrel, thereby locking the original note unwinding mandrel. It has become. When the two legs are spread apart from each other by pivoting one of the annular halves of the brake member during a longitudinal tension action on the ribbon, the appended part or protrusion is released from the teeth etc., and the unwinding mandrel is freed. Can be rotated. For this process, the pivotable half of the annular part of the brake element is provided with an extension or projection.

The distance between the addition or protrusion of the annular part and the notch or reduced cross-section is determined primarily by the depth of the teeth etc. and the magnitude of the pivoting movement away from the pivotable half of the ring-shaped brake member. It is determined according to the

The invention will now be explained with reference to the illustrated embodiment.

The illustrated IJ cassette essentially consists of a lower casing 1 and an upper casing 2 which are connected to each other by suitable bayonet connections. This housing lower part 1 has two extensions 3.4 which are covered by the upper part 2, with the IJ center running through the opening 6 in the direction of the arrow 5 into the right-hand extension δ. and runs through the open lower part, and both appendages 3. It extends across the intermediate chamber 8 between the cows in the direction of the arrow 9. On this path of motion, the type or code carrier part of the machine acts on the resemblance. This ribbon passes through the opening 10 into the second addition Φ and from there to the deflection roller 11 . Furthermore, resen is this direction change roller 1
1 to the winding shaft 13 in the direction of the arrow 12.

An unwinding shaft 14 is freely rotatably supported on the right side of the lower part 1 of the casing 1 as viewed in FIG. The reel core of the Sennori Senreel Sp is attached so that it cannot rotate or is almost unrotatable. A portion 17 having a diameter larger than that of the reinforcing portion 15 and provided with a groove portion 16 is disposed below the reinforcing portion 15 of the unwinding shaft 14 .・The reinforcing portion 15 of the unwinding shaft 14 has a bottle-shaped portion 18
and a grooved part 19, also pin-shaped, which projects above the upper surface of the casing upper part 2. The lower reinforcing part 15 and the part 17 have an inner bore 20 into which a not shown axle pin formed in the bottom 21 of the lower casing part 1 engages.

The winding spindle 13 is driven by a typewriter 1 printing machine or a computer and draws out the reel Sp 71son. At this time, for example, in order to be able to brake the ribbon even when the carriage of the machine is interlocked, the unwinding shaft 1 is
4, an annular portion 23 of a ring-shaped brake member 22 that functions as a brake mechanism is attached around the portion 17 having the groove portion 16. This annular portion 23 is the groove 1
6 and formed at a distance from each other as shown in FIGS. 2 and 3.
Holds 25. The free end 25a of the leg 25 rests against the rear side of the extension or projection 26 of the casing lower part 1, thereby preventing movement of the leg 25 in the counterclockwise direction (arrow 27). . The second leg 24 of the brake member 22 has an upwardly directed pin 28 of a size greater than the width of the resemblance, so that when the ribbon F is withdrawn from the reel Sp, the ribbon wraps around this pin 28. It is wrapped around. When a pulling force is applied to the ribbon F in the direction of arrows 5 and 9, the legs 24 move in a counterclockwise direction and the annular portion 23 is widened, thereby causing the unwinding to the unwind mandrel 14 and to the section 17 of the mandrel. The braking action is released. Resene F can now be freely rotated and withdrawn from the reel.

The annular portion 23 of the brake member 22 is arranged with a preload around the portion 17 of the unwinding mandrel 14 so as to provide a braking effect on the unwinding mandrel 14 in the starting position and in the unexpanded state of the legs 24.25. This prevents the resen from rotating inadvertently when an earthquake occurs. Conversely, when ribbon F is pulled in the direction of arrows 5 and 9, unwinding mandrel 14 is free to rotate.

The annular portion 23 of the brake member 22 has a notch 29;
The notch 29 intersects the angle bisector 3 between the legs 24 and 25.
0 on the opposite side of the annular portion 23 from the leg 24.25. On the one hand, this notch 29 facilitates the spreading action of the legs, and on the other hand the braking action on the unwinding shaft 14 can be maintained. Legs 24.
25 and the annular section 23 are arranged in one common plane, which facilitates the manufacture of the brake element 22 and at the same time the mounting of the brake element 22 on the section 17 of the unwinding mandrel 14. .

In the embodiment of the brake member 31 shown in FIG. 5, the leg 32 is made wider than the leg 33, whereas the annular portion 34 with the notch 35 has a width intermediate therebetween. ing.

A brake member 36 of similar construction is shown in FIG. In this example, the notch 37 of the annular portion 38
A deflection pin 42 located on the line 39 and having a small reinforcing wall 43 is mounted on the free end of the leg 41.

This notch 37 allows the annular portion 38 to be divided into two halves 44.
．． 45 and which is the half of the annular portion 38 adjacent to the leg 41 carrying the deflection pin 42, the inner wall 46 of the half 45 has a radially inwardly directed addition. A portion or protrusion 47 is provided.

This protrusion 47 may be arranged close to the notch 37 or even closer to the leg 41 (see addition or protrusion 47 shown in dashed lines).

The brake member 36 shown in FIG.
The unwinding center shown in the diagram? P48 is assigned, and the annular portion 3 of the brake member 36 is attached to the base 49 of the original note ejecting shaft 48.
Corresponding to the cross-section of the inner part 51 forming the inner wall 46 of FIG. The wall 52 of this recess or groove 50 is provided with narrow axial teeth or indentations 53 and the leg 41
and the annular portion 16 45 are in the starting position HζnF
When no tensile force in direction G in FIG. It is supposed to be done. Ritsu on the other hand? When the ring F is pulled in the direction of the arrow G, the legs 40,41 are spread out and the brake member 3
The half 45 of the annular portion 38 of 6 separates from the half 44 and the protrusion 47 disengages from said southern part or indentation 53. The winding mandrel and the winding reel mounted thereon are thus released and the notches 29, 35, 37 of the rake member in the various embodiments described above are replaced by the annular portions 23, 24, .
38 forming a spring-resilient hinge or hinge between both halves of the annular portion of the brake member so that each half of the annular portion of the brake member , the half connected to the leg loaded with lithium moves back to the predetermined starting position and causes a braking action.

The second leg 32.41 in FIGS. 5 and 6 is advantageously constructed more strongly than the leg 33.40, so that it is immobile perpendicularly to the plane of both legs. It is.

As can be seen from the examples described above, each notch formed as a reduced cross-section of the annular part 23, 34, 38 may have another shape, for example in the form of a flat half-moon. In addition, this reduced cross-sectional area of the annular portion 2 forms a flexible hinge between each area on the image side of the pin and nozzle portions.
3.34.38 may be provided inside. Furthermore
゛The position of this reduced cross section 29.35.37 is 180°
90 on both sides of the angle bisector, 1130.39
A good effect, even at a position of 1.degree., is obtained by locating the reduced cross-section on the angle bisector 30.39, as described above.

In the embodiment shown in FIGS. 9 to 13, a cylindrical additional portion 56 facing inward of the cassette and having a height h is fixedly formed on the cassette bottom 55. In the embodiment shown in FIGS. This additional part 5
A sleeve 57 is arranged so as to be rotatable around 6,
The sleeve 57 is supported on the bottom 55 and has an intermediate bottom 58 at approximately a height h from its end adjacent the cassette bottom 55 , on which the casing top 62 is mounted. A pin-like portion 59.60 is provided which projects through the hole 61 and thus prevents the sleeve 5 from being disposed.
7 can be rotated from above the casing upper part 62. The outer surface of the sleeve 57 is also grooved b
p, so that the reel core 63, which is fitted over the sleeve 57, is rotated, as in the example of FIG. It is also possible to do so.

The brake member in this case also has an annular portion 64;
The annular portion 64 is connected to the sleeve 57 above the intermediate bottom 58.
It has a sleeve portion 65 that extends into the interior of the sleeve. Furthermore, the annular part 64 also has two legs 66, 67, of which the outer surface 57a of the legs 67 abuts against the stationary casing part 68, and on which the cassette bottom 55 is attached. A direction adding section 69 is provided, and the ribbon F is wound around the circumference of the adding section 69 from the outside.

On the side of the annular part 64 opposite the legs 66,67, preferably on the angle bisector 70, a cutout or notch 71 is provided, which cutout or notch 71 in the sleeve 57 is moving to. IJ,+F arrow 72
When a tensile force in the direction of
and can be freely rotated by the reel.

Furthermore, as shown in FIGS. 12 and 13, the sleeve 5
A groove or toothing 7 is formed in the inner wall 57a of the brake member, and a pin or protrusion 7 is formed on the outer surface of its sleeve portion 65 at a height close to the area 73 of the annular portion 64 of the brake member.
5 is provided, and when the leg portion 66 is pivoted in the direction of the arrow 75, the protrusion portion 75 engages with the groove portion or tooth portion 74.
be freed from

The annular portion 64 of the brake member may be provided with a short extension (1 to 2 mm height) similar to the sleeve portion 65 so as to point upwardly and abut against the casing upper portion 62;
Thereby, the legs 66 are directly below the upper part 62.
If it comes into contact with it, it will move without luck.

[Brief explanation of drawings]

The drawings show several embodiments of the invention, the first
The figure is a top view of the regen cassette according to the present invention with a portion of the upper part of the cassette removed, FIG. 2 is a top view of the unwinding shaft equipped with the brake member, and FIG. 4 is a side view of the unwinding mandrel whose lower part is surrounded by the annular part of the brake member, and FIG. 5 shows a brake according to another embodiment. 6 is a plan view of the brake member having an extension or protrusion directed radially inward; FIG. 7 is a sectional view taken along the line ■-■ of FIG. 8;
The figure is a side view of an unwinding shaft formed corresponding to the brake member of FIG. 6, and FIGS. 9, 10, 11, 12, and 13 are brake members according to still other embodiments. It is a figure showing each part related to it. l... Upper part of the casing, 2.62... Upper part of the casing, 3,4.56.69... Additional part, 5,9°12.
27.72,74,75. a...Arrow, 6.7.10
...Opening, 8...Intermediate chamber, 11...Direction changing roller,
13... Winding mandrel, 14.48... Unwinding mandrel,
15... Reinforcement part, 16.50... Groove part, 17.
... part, 18.19.59.60... bottle-shaped part,
20... Inner hole, 21... Bottom, 22, 31° 36.
... Brake member, 23.34, 38.64 ... Annular part, 24.25.32.33.40°41.66.6
7... Leg part, 25a... Free end part, 26... Projection part, 28... Bin, 29.35.37.71... Notch, 30.39.70... Angle two Equisector line, 42...
- Direction change bin, 43... Reinforcement wall part, 44.45... Half part, 46.57a... Inner wall, 47.4 side part, 52.
... wall, 53 ... notch, 55 ... cassette bottom,
57...Sleeve, 58...Middle bottom, 61...
・Hole, 63...Reel center, 65...Sleeve part,
67 &... outer surface, 68... casing part, 71a
... Vertical groove, 7°3, 73a... Range, 74...
・Tooth part, Sp... Rizu-n reel, F... Ribbon, h... Height

Claims (1)

[Claims] 1. Ribbon cassette for typewriters and writing mechanisms of printing machines, computers and the like, comprising a winding mandrel for used ribbons and an unwinding shaft for unused ribbons. A ring-shaped brake member is disposed around the unwinding mandrel and has a plurality of legs arranged in a V-shape, one of the legs. is held in a projection of the cassette casing, and in which the resemblance is guided around the 4° free end of the other leg, the ring-shaped brake member (22, 31, 36) is connected to one The brake member (22) is formed from a flat plastic member.
, 31, 36) of the annular part (23, 34, 38) on the opposite side to the leg (24, 25; 32. 33; 40. 41) 5-sided reduced part (29, 35, 37) A Sumen cassette characterized by being formed with. The reduced cross section portions (29, 35, 37) are the legs (24,
25; 32, 33; 40, 41); 32, 33; 40, 41); 32, 33; 40, 41); The reduced cross-section portion is formed by a wedge-shaped notch (2) formed radially inward from the circumferential surface of the annular portion of the brake member.
9, 35, 37), the Z-link cassette according to claim 2. The annular portion (38) of the brake member (36) has a notch (3).
The leg (4) is divided into two halves (44, 45) by 7) and has an end on which the ribbon (F) is wound.
1. The girder cassette according to claim 1, wherein an additional portion or protrusion (47) is formed on the inner surface of the half portion (45). Axial teeth or indentations (53) on the inner wall (52) of the recess or groove (50) for wholly or partially receiving the annular portion (38) of the brake member (36). A ribbon cassette according to claim 1, wherein the ribbon cassette is formed of a ribbon cassette or a similar one. 68 The brake element (22, 31, 36) consists of a flat plastic strip with a rectangular cross section,
A glue sensor cassette according to claim 1. 7 Vertical winding bin (28, 42) for brake members
The leg (24, 32, 41) with at its end is immovable in a direction perpendicular to the plane of both legs (24, 25; 32.33; 40.41). Claim No. 6
Glue sensor cassette described in section. 8. The leg (32, 41) of the brake member with the vertical wrapper at its end is connected to the second leg (33, Cow O) and (also 1l-i) of the annular part of the brake member. ff134.
38), the brake part +( has a larger cross section than the casing bottom part (
The sleeve (57) is rotatable around the cylindrical extension part (56) of 55), and an intermediate bottom part (58) is formed at approximately half the height of the sleeve (57). and on this intermediate bottom (58) there is a casing upper part (62).
one or more bottle-shaped portions (59,
60) is arranged, the glue sensor cassette according to claim 1. The annular part (64) carrying the 1O legs (66, 67) is provided with a sleeve part (65) directed towards the middle bottom (58) of the sleeve (57), which sleeve part (65) ) is rotatable within the sleeve (57). 11. A radial slot or notch (71) on the opposite side of the brake member from the legs (66, 67) connects to a notch or longitudinal groove (71a) in the sleeve part (65). , a glue sen cassette according to claim 10. 12. The gluing center cassette according to claim 9, wherein a groove or tooth portion (74) is formed on the inner wall (57a) of the sleeve (57) in a range above the intermediate bottom portion (58). 13. A bottle or protrusion (7
13. The ribbon cassette according to claim 12, wherein: 5) is provided.