JPS5972B2 - Ribbon Cartridge Geosonata Typewriter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a typewriter equipped with a ribbon cartridge, and in particular, to prevent the ribbon from sagging within the cartridge when the ribbon cartridge is removed from the typewriter body and when the cartridge is transported. At the same time, even if the ribbon portion exposed to the outside of the cartridge housing is pulled, the ribbon does not come out of the housing.

A typical typewriter ribbon cartridge rotatably supports a pair of ribbon supports within the cartridge, and the ribbon wound around the ribbon supports is moved from one ribbon support to the other ribbon support each time a printing operation is performed. It is something that is wrapped around the body.

In conventional typewriters equipped with this type of ribbon cartridge, there was no mechanism to secure the ribbon support when the ribbon cartridge was removed from the typewriter body and transported. The support body moved blindly, causing the ribbon to sag within the housing. Furthermore, if the ribbon portion exposed to the outside of the housing was hooked to parts of a typewriter, the ribbon could be pulled further out of the housing. This invention was made to eliminate these drawbacks, and when the ribbon cartridge is removed from the typewriter body, a locking member is pressed against the flange of the ribbon support, so that the ribbon support cannot be rotated. The present invention aims to provide a typewriter in which the ribbon is prevented from sagging, and a release member is provided in the typewriter body to release the locking member when the ribbon is attached to the typewriter body.

An embodiment embodying the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a plan view of essential parts showing an embodiment of the present invention applied to a ribbon cartridge of a type bar typewriter, Fig. 2 is a cross-sectional view of a half part of the cartridge, and Fig. It is a sectional view taken along the line I-I.

In the figure, 1 is a platen rotatably supported at the rear of the typewriter, and by operating a character key (not shown), type 4 on a type bar 3 pivoted to a type bar segment 2 is moved onto the platen 1. The printing point A is printed via a printing ribbon 5 and printed on printing paper 6.

A top cover 7 is a part of the typewriter cover, and is detachably supported on the typewriter body.

A ribbon cartridge 8 houses the ribbon 5 and is supported so as to be detachable from the typewriter body after the top cover 7 is removed.

Reference numeral 9 designates cartridge housings molded from a synthetic resin material, which are arranged in pairs on the left and right sides of the printing point A, and are connected at the center by an arm 10 made of a steel plate.

Reference numeral 11 denotes a ribbon vibrator, and a ribbon passageway through which the ribbon 5 is inserted is formed.

This ribbon vibrator 11 is always held below the printing point A, and is raised to the front of the printing point A every time a printing operation is performed, and guides the ribbon 5 to the front of the printing point A via the ribbon passage. ing. The ribbon cartridge 8 is symmetrical with respect to the position of the printing point A, and the left half of the ribbon cartridge 8 will be explained below based on FIGS. 2 and 3, and the explanation of the right half will be omitted. .
The housing 9 includes a housing main body 9a that covers the top and side surfaces, and a bottom plate 9b that covers the bottom. This housing 9 includes a ribbon accommodating part 12 for accommodating the ribbon 5, a connecting part 13 extending rightward from the accommodating part 12, and b.
{The above-mentioned arm 10t is formed in the connecting portion 13)
3. They are caulked together. Circular holes 14 and 15 are formed approximately in the center of the top surface of the ribbon accommodating portion 12 of the housing main body 9a and in the center of the bottom portion 9b, respectively.

A ribbon supporter 16 is housed within this ribbon housing portion 12 . An operating knob 17 is formed at the top of the ribbon support 16, and a number of drive holes 19 are formed at the bottom to fit with drive pins 18 of the typewriter body. These operation knobs 17 and drive hole 19 are exposed upward and downward from the circular holes 14 and 15, respectively, and the ribbon support 16 can move back and forth and left and right within the horizontal plane within the circular holes 14 and 15. It is loosely fitted as shown.
Further, this ribbon support 16 is formed with flange portions 20 and 21f which are vertically parallel within the housing 9. A serrated protrusion 22 as shown in FIG. 3 is formed on the periphery of the lower flange portion 21. As shown in FIG. The ribbon 5 has one end fixed to the middle part of the ribbon support 16 and is wound between both flanges 20 and 21, and is guided by guide pins 23 and 24 protruding from the housing main body 9a. The housing 9 is inserted through an opening 25 formed at the rear of the housing 9.
being sent outside.

In FIG. 2, what is indicated by a two-dot chain line below the housing 9 is a ribbon feeding mechanism in the typewriter body.

That is, 26 is a base, and a drive shaft 27 is rotatably supported on this curtain base 26. 28 is a drive plate, and this drive plate 28 and drive shaft 27 are intermittently fed in the ribbon winding direction (in the opposite direction of arrow B in FIG. 3) every time a printing operation is performed.

The drive pin 18 rotates integrally with the drive plate 28, and drives the ribbon support 16 by fitting into any one of the plurality of drive holes 29. Such a ribbon feeding mechanism is also provided below the housing 9 on the right side, but a ribbon feeding direction switching mechanism (not shown) drives only one of the left and right feeders. The ribbon support 16, which is connected to the feeding mechanism, is allowed to freely rotate L.

Reference numeral 29 denotes a locking member, which is rotatably supported by a shaft 30 implanted near the opening 25 of the housing 9, as shown in FIG.

The lower flange portion 2 is attached to the distal end of the locking member 29.
a locking part 31 that can engage with the protrusion 22 formed in 1; and a contact part 33 that can come into contact with a locking protrusion 32 that projects downward from the housing main body 9a and has a U-shaped cross section; It is formed. Reference numeral 34 denotes a biasing spring that biases the locking member 29 to rotate in the counterclockwise direction in FIG. The upper end is hooked to a stepped portion (not shown) of the housing main body 9a.

The lower part of the locking member 29 is open as shown in FIG. 2, so that the operator can rotate the locking member 29 clockwise in FIG. 3 against the biasing spring 34. It's getting old. Reference numeral 35 shown in FIG. 2 is a release member, which is fixed to the base 26 in the typewriter body.

The upper edge of the arm portion 36 extending upwardly of the release member 35 is a cam edge 36a, and this cam edge 36a can engage with the right edge 37 of the locking member 29. In such a ribbon cartridge 8, the ribbon 5 whose one end is fixed to the ribbon support 16 is guided by the guide pins 23 and 24 and passes between the locking projection 32 and the abutting portion 33.

Therefore, when the cartridge 8 is removed from the typewriter main body as shown by the solid line in FIGS. 2 and 3, the locking member 29 is biased by the biasing spring 34 and the contact portion 33 is pressed against the locking protrusion. It is maintained in the state. As a result, the slack in the ribbon portion exposed to the outside of the housing 9 is removed, the ribbon 5 is held between the locking protrusion 32 and the contact portion 33, and the ribbon 5 inside the housing 9 comes out of the housing. is prevented. Further, at this time, since the locking portion 31 of the locking member 29 is located within the rotation locus of the protrusion 22 of the flange portion 21, the ribbon support 16 is prevented from rotating in the direction of arrow B in FIG. This prevents the ribbon on the ribbon support 16 from sagging within the housing 9 during transportation of the ribbon cartridge 8 or the like.

Next, when this ribbon cartridge 8 is placed on the ribbon feeding mechanism of the typewriter main body (a part of which is indicated by a two-dot chain line in FIG. 2), the locking member 29 engages with the release member 35 in the typewriter main body. match. And that cam edge 3
The locking member 29 is rotated clockwise in FIG. 3 by the cam action of 6a, and held at the release position shown by the two-dot chain line. As a result, the engagement between the protrusion 22 of the flange portion 21 and the locking portion 31 of the locking member 29 is released, and the ribbon support 1
6 becomes rotatable within the housing 9, and the ribbon 5
t) 3 Allowed to move freely. When the ribbon 5 is fed each time a printing operation is performed, the ribbon 5 in the housing 9 is tensioned, and the ribbon 5 passes through a normal ribbon path 5a shown by a two-dot chain line in FIG. At this time, since the ribbon vibrator 11 moves up and down in front of the printing point A every time a printing operation is performed, the ribbon portion exposed outside the housing 9 has slack to the extent that it does not become a resistance to the up and down movement of the vibrator 11. There is.

In such a ribbon cartridge 8, after the ribbon 5 is removed from the ribbon vibrator 11, the locking member 29 that is removed from the typewriter body again comes off the release member 35, so the locking member 29 is biased by the biasing spring 34. Then, the locking member 29 moves until the locking portion 31 comes into pressure contact with the flange portion 21 of the ribbon support 16.

At this time, the ribbon support 16 is connected to the circular hole 14 of the housing 9,
Since the locking member 29 is loosely fitted within the locking member 15 , the locking member 29 finally moves to a locking position where the abutting portion 33 abuts the locking protrusion 32 . In this state, even if the ribbon support 16 attempts to rotate in the direction of arrow B in FIG. 3, the locking portion 31 and the protrusion 22 engage and the ribbon support 16 cannot rotate. Furthermore, since the ribbon support (not shown) in the right housing 9 is similarly locked, the ribbon support 16 cannot rotate in the opposite direction of arrow B. Note that when the locking member 29 moves from the release position to the locking position, the contact portion 33 thereof moves across the ribbon path 5a, so that the ribbon 5 slack outside the housing 9 becomes under tension. This additionally prevents the ribbon support 16 from rotating in the opposite direction of arrow B.

As detailed above, in the typewriter according to the present invention, when the ribbon cartridge is attached to the typewriter body, the ribbon can move freely, and when the ribbon cartridge is removed from the typewriter body, the locking member 29 is locked. Since the ribbon support 16b3 is locked by the portion 31 so that it cannot rotate, the ribbon 5 is fixed to the housing 9.
This prevents the ribbon from sagging inside the housing and prevents the ribbon from coming out of the housing.

Therefore, in the typewriter according to the present invention, the ribbon does not slacken in the housing when removing the cartridge from the main body and when transporting the cartridge, and it is not necessary to manually wind the ribbon around the ribbon support before installing the cartridge. It's something that doesn't exist.

[Brief explanation of the drawing]

Fig. 1 is a plan view of essential parts showing an embodiment of the present invention applied to a ribbon cartridge of a type bar typewriter, Fig. 2 is a cross-sectional view of a half part of the cartridge, and Fig. - line sectional view. In the figure, 1 is a platen, 5 is a ribbon, 5a is a ribbon passage,
8 is a ribbon cartridge, 9 is a housing, 11 is a ribbon vibrator, 16 is a ribbon supporter, 21 is a flange portion, 22 is a protrusion, 25 is an opening, 29 is a locking member, 31 is a locking portion, and 32 is a locking member. 33 is a contact portion, 34 is an attached spring, and 35 is a release member.

Claims (1)

[Claims] 1 A housing having two ribbon passage openings, a pair of ribbon supports rotatably supported within the housing and having a flange portion, one end of which is fixed to one of the ribbon supports and the other end fixed to the other. a ribbon which is fed from one ribbon support through the opening and is wound through the opening onto the other ribbon support after passing through the printing point; In the typewriter equipped with a ribbon cartridge, a locking member having a locking portion that engages with the periphery of the flange portion to suppress rotation of the ribbon support by the urging force of the urging means; The type includes a release member that engages with the locking member when the cartridge is attached to the typewriter, and moves the locking portion of the locking member against the biasing force to release the engagement with the flange portion. A typewriter equipped with a ribbon cartridge, which is characterized by being provided inside the writer body.