JPS5971B2 - Ribbon Cartridge Geosonata Typewriter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a typewriter equipped with a ribbon cartridge, and in particular, when the ribbon cartridge is removed from the typewriter body and when the cartridge is transported, the ribbon exposed to the outside of the housing of the cartridge is removed. This was intended to eliminate slack in the ribbon and to prevent the ribbon from being pulled out of the housing.

A typical typewriter has a ribbon vibrator that moves up and down in front of the printing point on the platen, and the ribbon is inserted through this ribbon vibrator to guide the ribbon to the printing position each time a printing operation is performed. It is used to guide the movement of people.

In such typewriters, the ribbon on both sides of the ribbon vibrator always has some slack to prevent the ribbon from becoming too tense as it moves up and down. Therefore, when the ribbon cartridge used in such a typewriter is attached to the typewriter, the ribbon portion exposed from the cartridge housing naturally has some slack. Therefore, when the ribbon cartridge is removed from the typewriter, the ribbon portion exposed to the outside of the housing remains slack, and the operator must manually tension the ribbon after removal. Further, when the cartridge is removed or transported with the ribbon slack, the ribbon often gets caught on other parts of the typewriter, causing the ribbon to be pulled out further from the housing. Furthermore, when trying to attach the ribbon cartridge to the typewriter again, if the ribbon is slack as described above, it will not be possible to insert the ribbon into the ribbon vibrator at the same time as the cartridge is attached to the typewriter, and the effect of the cartridge will be reduced. will be halved. This invention was made to eliminate these drawbacks, and when the ribbon cartridge is removed from the typewriter body, the slack in the ribbon portion exposed outside the housing is automatically removed, and the ribbon is removed. To provide a typewriter which prevents the ribbon from coming out of the cartridge by pressing it inside the cartridge.

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 ■-■.

In the figure, numeral 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 pivotally supported on 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. The housing 9 is formed with a ribbon accommodating part 12 for accommodating the front Δ width ribbon 5 and a connecting part 13 extending rightward from the accommodating part 12, and the arm 10 is caulked to the connecting part 13. has been done. Circular holes 14 and 15 are formed in the center of the upper surface of the ribbon accommodating portion 12 of the housing main body 9a and in the center of the bottom plate 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 1 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, the ribbon support 16 is provided with flanges 20 and 21 that are vertically parallel to each other 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 the flanges 20 and 21, and is guided by guide pins 23 and 24 protruding from the housing main body 9a. It is sent out of the housing 9 through an opening 25 formed at the rear of the housing 9.

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 seven drive shafts 27 are rotatably supported on this base 26. Reference numeral 28 denotes a drive plate, and this one drive plate 28 and one drive shaft 27 are intermittently fed in the ribbon winding direction (in the opposite direction of arrow B in FIG. 3) each time a printing operation is performed.

The first drive pin 18 rotates together with the drive plate 28, and drives the ribbon support 16 by fitting into any one of the plurality of drive holes 29. Although such a ribbon feeding mechanism is also provided below the housing 9 on the right side, only one of the left and right feeding mechanisms is driven by a ribbon feeding direction switching mechanism (not shown). A ribbon support 16 connected to the mechanism is allowed to rotate freely.

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 portion 31 that can engage with the protrusion 22 formed in the housing main body 9a, and a contact portion 33 that can come into contact with a locking protrusion 32 having a U-shaped cross section and projecting downward from the housing main body 9a are formed. ing. Reference numeral 34 denotes a biasing spring that biases the locking member 29 to rotate counterclockwise in FIG.
The lower end is hooked to a protrusion formed on the locking member 29, and 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 in pressure contact with the locking protrusion. is maintained. 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 abutting portion 33, and the ribbon 5 inside the housing 9 is moved 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
be allowed to move freely. When the ribbon 5 is fed each time a printing operation is performed, the ribbon 5 in the housing 9 becomes taut.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, when the ribbon 5 is removed from the ribbon vibrator 11 and then removed from the typewriter body again, the locking member 29 will be removed from the release member 35, so that the locking member 29 will be biased by the biasing spring 34. The contact portion 33 of the locking member 29 moves across the ribbon path 5a to the locking position where it contacts the locking protrusion 32.

At this time, the ribbon 5 is hooked on the contact portion 33 and moves from the ribbon passage 5a to the position shown by the solid line, so that the portion of the ribbon 5 exposed outside the housing 9
The ribbon 5 is pulled back inward, and the slack of the ribbon 5 outside the housing 9 is removed. Furthermore, since the ribbon 5 is held between the abutting portion 33 of the locking member 29 and the locking protrusion 32 of the housing main body 9a, it is difficult for the ribbon 5 to move. Note that when the contact portion 33 crosses the ribbon path 5a, the ribbon 5 also tries to move from the ribbon support 16 side to the opening 25 side;
Due to the friction between the ribbon support 16 and the housing 9, movement of the ribbon 5 in this direction is small.

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 cartridge is removed from the typewriter body, the abutment portion 33 of the locking member 29 is As the ribbon 5 moves across the ribbon path 5a and is brought into pressure contact with a locking protrusion that is a part of the housing, the ribbon portion outside the housing 9 is pulled back into the housing, thereby removing slack in the ribbon outside the housing. This also prevents the ribbon from coming out of the housing.

Therefore, in the typewriter according to the present invention, there is no need to wind up the ribbon of the ribbon cartridge removed from the typewriter body into the housing, and the ribbon comes out of the housing when the cartridge is transported. It is possible to prevent this.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts showing an embodiment of the present invention implemented in a type bar typewriter telephone cartridge, FIG. 2 is a cross-sectional view of half of the cartridge, and FIG. It is an m-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 a biasing spring, and 35 is a release member.

Claims (1)

[Claims] 1. A housing including a ribbon vibrator that moves up and down in front of a printing point on a platen and having two openings, a pair of ribbon supports rotatably supported within the housing, and one of the ribbon supports. a ribbon having one end fixed to the other end and wound around the ribbon supports; the ribbon being fed from one of the ribbon supports to the outside of the housing through one of the openings; A typewriter comprising a ribbon cartridge which, after being inserted into a vibrator, enters the housing through the other of the openings and is wound around the other of the ribbon supports; an abutment member having an abutment portion movable across the ribbon so as to abut a portion of the ribbon at a location away from the ribbon path; a biasing member that biases the ribbon cartridge toward the ribbon cartridge, and when the cartridge is installed in a typewriter, the ribbon cartridge engages with the abutting member to bias the abutting portion of the abutting member. A release member is provided in the typewriter body for moving against the biasing force of the member to release the pressure contact with the ribbon portion, and when the ribbon cartridge is removed from the typewriter, the contact portion of the contact member is in the ribbon passage. A ribbon cartridge characterized in that by moving the upper ribbon toward a part of the housing, the ribbon part exposed outside the housing is drawn into the housing to remove slack in the ribbon. Typewriter.