JPS6079955A - Type wheel cartridge - Google Patents

Abstract

PURPOSE:To provide a miniaturized type wheel cartridge eliminating the reel section and the supply section of an ink ribbon by using a petal-shaped wheel and a disc-shaped ink ribbon with almost the same shape as this. CONSTITUTION:A petal-shaped wheel 15 and a disc-shaped ink ribbon 9 with almost the same shape as this is fixed on a ribbon frame 11 having an internal gear 11a on the internal periphery thereof and three planetary gears 11a-14c to be meshed therewith 11a are mounted rotatably on an ink ribbon cover to form a differential gear mechanism. The petal-shaped wheel 15 is fixed on the shaft of a servo motor 22 while a driving gear 23 is fastened and meshed with the inside of the three planetary gears 14a-14c. An ink replenishing bodies 26 and 27 impregnated with ink are provided on the ink ribbon cover 12 so as to abbut on a disc-shaped ink ribbon 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a type wheel cartridge for a thin plastic type body used in impact-type matrix printing type printers, quiwriters, and the like.

[Prior art]

In recent years, in printers using matrix type type, plastic type called petal type type poile has come into widespread use as the cost and speed of printers have decreased.

How to print using this petal-shaped type wheel 1.1
1++1ILbA1+t1J+ノ, hlll-1ノ9 is an essential element, and its shape is a belt-like ribbon with a constant width.

Generally, the ink ribbon is wound around a ribbon spool and runs in front of the typeface while changing its feeding direction, or it is endless and runs only in one direction.

Below, a conventional printer using a petal-shaped type wheel will be explained based on FIG. 1, and its drawbacks will be described.

FIG. 1 is a schematic perspective view of a printer using a conventional petal-shaped type wheel, in which 1 is a platen that wraps a printing medium to form a printing surface, and 2 is a petal-shaped type with type integrally molded around its periphery. 3 is a servo motor that rotationally drives the petal type type wheel 2; 4 is a carriage on which the servo motor 3 is placed and is movable in the horizontal direction; 5 is a guide shaft that guides the horizontal movement of the carriage 4; A spacing wire for horizontally moving the carriage 4; 7 a print hammer which has an electromagnetic magnet inside and impacts the type on the petal-shaped type wheel 2 when excited by a print signal; 8 a platen 1 and the petal-shaped type wheel; This is a band-shaped ink ribbon that runs between the two.

The printing operation of the printer with this component configuration is as follows.

The spacing wire 6 moves the carriage 4 in the printing direction, and the servo motor 3 is rotated according to the print signal to select the type of the petal-shaped type wheel 2, and the print hammer 7 is energized to move the petal-shaped type wheel 2. press the typeface. Then, the petal type type wheel 2
The characters are printed by pressing the ink ribbon 8 against the printing medium wrapped around the platen 1.

However, the band-shaped ink ribbon 8 of constant 11] used here has the following drawbacks.

This is disadvantageous in that it requires a winding and supply ribbon for the ink ribbon 8, as well as stabilizing its running, resulting in a complicated device configuration3.Also, the area occupied by the ink ribbon 8 in its running is petal-shaped. Since a horizontal surface is used, avoiding the type hole 2 and the print hammer 8, there is a drawback that a wide area is required and the device becomes large.

[Purpose of the invention]

It is an object of the present invention to overcome the drawbacks of the prior art by using a disk-shaped ink ribbon that is approximately the same shape as a petal-shaped type wheel.

[Purpose of the invention]

The structure of the present invention is as follows.

A disc-shaped ink ribbon that is approximately the same shape as a petal-shaped type wheel is fixed to a ribbon frame that has internal gears on its inner periphery, and three planetary gears that mesh with the internal gears of the ribbon frame are rotatable to the ink ribbon cover. It is installed and arranged to form a differential gear mechanism.

Meanwhile, the petal-shaped type wheel is fixed to the motor shaft of a servo motor, and a driving gear is fixed to the motor shaft of the servo motor, and the driving gear is disposed in mesh with the three planetary gears.

An ink supply body impregnated with ink is provided on the ink ribbon cover so as to come into contact with the disc-shaped ink ribbon, or is the ink ribbon cover 1FJ4+? A disk-shaped ink ribbon is formed with a sector-shaped part 2tti having a shape that partially corresponds to the ribbon, and an ink supply body impregnated with ink is placed in the sector-shaped part. The 11th chapter is set a little later than the 11th chapter.

〔Example〕

Hereinafter, a type wheel cartridge according to an embodiment of the present invention, which is characterized by the above-mentioned object and structure, will be explained based on the drawings, and its effects will be described.

FIG. 2 is a perspective view of a type wheel cartridge according to an embodiment of the present invention, FIG. 3 is a side sectional view of the type wheel cartridge showing the device configuration, and FIG. 11 is a differential gear mechanism for a disc-shaped ink ribbon. FIG.

In the figure, 9 is a disc-shaped ink ribbon impregnated with an ink, 10 is a thin film layer with appropriate strength and elasticity that is adhered or coated on the back surface of the disc-shaped ink ribbon 9, and 11 is a disc-shaped ink ribbon 9. A ribbon frame to be fixed, 11a is an internal gear formed on the inner periphery of the ribbon frame 11, 12 is an ink ribbon cover, 13a, 13b,
13c is a hook for fixing the entire ink ribbon cover 12 to the type wheel cartridge described later; 14a+14
b, 14c are three planetary gears rotatably attached to the ink ribbon cover 12, and the planetary gears 13a, 13b
, 13c are engaged with the internal gear 11a of the ribbon frame 11, and the disc-shaped ink ribbon 9 forms an ink ribbon cover.
12 so as to be rotatable. These planetary gears 14a and 14b.

14c and the internal gear 11a of the ribbon frame 11 are engaged by a differential gear mechanism, and in response to the rotation of the drive gear of the servo motor (to be described later), the rotation of the disk is slower than the rotation of the servo motor. This will give the ink ribbon 9 a shape.

15 is petal-shaped type poile, 16 is type, 17 is type 1
6 is the finger that extends to the printing position, 18 is finger 1
A plurality of fingers 17 extending radially from the hub portion 18 are provided with printed characters 16 on the same outer periphery.
is formed to form a petal-shaped type wheel 15. 19
20 is a lock spring for fixing the petal-shaped type wheel 15 to a servo motor to be described later; 20 is a rotation stopper pin provided on the hub portion 18 of the petal-shaped type wheel 15;
21 is a type wheel cassette, and the ink ribbon cover 12 is engaged with the type wheel cassette 21 with its hooks 13a, 13b, and 13c to form an integrated type wheel cartridge.

The type wheel cartridge is removably mounted on a carriage not shown.

Reference numeral 22 denotes a servo motor that rotates the petal-shaped type wheel 15 quickly and rotates the disc-shaped ink ribbon 9 slowly.
3 is a drive gear attached to the motor shaft of a servo motor 22, and the servo motor 22 is mounted on a carriage (not shown), and the drive gear 23 is passed through the center hole of the petal-shaped type wheel 15 and locked with a lock spring 19. Three planetary gears 14a, 14b, 14 of the disk-shaped ink ribbon 9
This is an arrangement that meshes with c.

24 is a type 1 having a built-in electromagnetic magnet and positioned at the printing position of the petal type type wheel 15 according to a print signal.
It is a print hammer that presses 5.

Reference numeral 25 denotes a platen that forms a printing surface by winding up a printing medium that is placed facing the printing hammer 24 and the type 16 at the printing position on the same center line.

The attachment and operation of the type wheel cartridge constructed in this way will be explained based on the above-mentioned drawings.

First, the type wheel cartridge is mounted on a carriage (not shown), and the drive gear 23 of the servo motor 22 mounted on the carriage is passed through the center of the petal-shaped type wheel 15 of the type wheel cartridge to lock the lock spring 1.
9, and a rotation stopper pin 20 is fitted to engage the planetary gears 14a, 14b, 14c of the disc-shaped ink ribbon 9, respectively.

Attachment of the type wheel cartridge to the device is now complete, and its removal can be accomplished by pulling out the type wheel against the locking of the lock spring 19 to the drive gear 23.

The servo motor 22 is rotated by the print signal, rotates the petal-shaped type wheel 15 to the print position, and moves the type 16 necessary for printing to the print position-4), and in conjunction with this, the print hammer 24 is activated. Press type 15. The type 15 moves toward the platen 25 against the elasticity of the fingers 17 and passes through the film layer 10 to the disc-shaped ink ribbon 9.
is pressed onto the printing medium wrapped around the platen 25, and the type 1
The character shape 5 will be stamped on the printing medium. 1. This printing is performed continuously, and the rotation H of the petal-shaped type wheel 15 and the servo motor 22 that accompany this printing are
The disc-shaped ink ribbon 9 (d) rotates quickly through the 14-star gears 14a, 14b, and 14c, so it rotates in the same direction slower than the petal-shaped type wheel 15. , the disc-shaped ink ribbon 9 and the petal-shaped type poi 15 are rotated in the same direction as I11- while shifting their positions [77r].

In the disk-shaped ink ribbon 9, when the ink containing f is used up, it must be converted. That is, the type wheel cartridge is pulled out and removed from the apparatus, and the hooks 13a, 13b of the ink ribbon cover 12 are removed.
By removing it from the 13ci type wheel 21, the old disc-shaped ink ribbon 9 can be removed and easily replaced with a new one.

Next, a type wheel cartridge equipped with an ink replenisher for automatically replenishing ink to the disc-shaped ink ribbon 9 will be described with reference to FIG. Note that the same reference numerals are used for parts that are the same as those in the previous embodiment.

FIG. 5 is a perspective view of a type wheel cartridge having an ink supply body, in which 9 is a disc-shaped ink ribbon, 12 is an ink ribbon cover, 21 is a type wheel, and 26 is a storage section provided at a predetermined position of the ink ribbon cover 12. This is a cylindrical ink supply body impregnated with ink so as to come into contact with the disk-shaped ink ribbon 9.

This ink supply body 26 always contacts the disc-shaped ink ribbon 9 and replenishes ink while rotating as the disc-shaped ink ribbon 9 rotates, so when the printer is not printing, the printer stops and the disc-shaped ink ribbon 9 stops. When the shaped ink ribbon 9 stops, ink is oversupplied at the contact portion with the ink replenisher 26, and the print condition in that portion becomes darker than in other portions, resulting in the inconvenience of uneven printing.

However, this inconvenience can also be solved by the following ink replenisher. The explanation will be based on FIG. still,
The same reference numerals will be used for parts that are the same as those described above, and further explanations will be omitted.

FIG. 6 is a perspective view and a side sectional view of a type wheel cartridge having another ink supply body, and shows a type wheel cartridge having elasticity with grooves corresponding to the disc-shaped ink ribbon 9 of the ink ribbon force bar 12. a fan-shaped part that can be moved by
Reference numeral 27 denotes an ink supply body impregnated with ink and adhered to the entire inner surface of the fan-shaped portion 12a.The ink supply body 27 does not come into contact with the disk-shaped ink ribbon 9, but has a predetermined gap therebetween.

This ink replenisher 27 is pressed by an external pressing force A and comes into contact with the disk-shaped ink ribbon 9 to replenish ink.

For example, when the type wheel cartridge mounted on the carriage comes to the position of the suppression lever, the ink supply body 27 is energized by a suppression lever that is driven by an electromagnet provided in the printer. can be pressed through the fan-shaped portion 12a'z and brought into contact with the disk-shaped ink ribbon 9 to replenish ink.

〔Effect of the invention〕

As explained in detail above, in the present invention, a disk-shaped ink ribbon corresponding to a full-petal type type wheel is used, and a type wheel cartridge is integrated with the petal type type wheel, so that the following effects can be fully exhibited. Can be done.

The disc-shaped ink ribbon can be placed in the same vertical arrangement as the petal-shaped type wheel, and the disc-shaped ink ribbon can also be rotated by the servo motor that rotates the petal-shaped type wheel, which makes it possible to place the disc-shaped ink ribbon in the same vertical position as the petal-shaped type wheel. This has the effect of solving the problem of complication and enlargement of the apparatus due to the horizontal arrangement of the ribbon and the drive mechanism for horizontal movement, thereby simplifying and downsizing the apparatus.

In addition, since the ink ribbon is disk-shaped, a stable and reliable ribbon running mechanism can be obtained, and a simple mechanism in which the disk-shaped ink ribbon rotates slower than the petal-shaped type wheel. This has the effect that an ink ribbon with a relatively long life can be obtained, and that the ink supply unit can be easily integrated into the entire print wheel cartridge, thereby further extending the life of the ink ribbon.

This type wheel cartridge also has the effect of allowing consumables in the printer to be replaced with one touch and with clean hands.

Due to these effects, the present invention can be advantageously used in printers, typewriters, etc. of the impact type FIJ type printing system.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a printer using a conventional petal-shaped type poile, FIG. 2 is a perspective view of a type wheel cartridge according to an embodiment of the present invention, and FIG. 3 is a perspective view of a type wheel cartridge showing the device configuration. The side cross-sectional view, Figure 4 shows the difference between disc-shaped ink ribbons! A front view of the ItL gear mechanism, FIG. 5 a perspective view of a type wheel cartridge with an ink supply, and FIG. 6 a perspective and side sectional view of the type wheel cartridge with another ink supply. 9...Disk-shaped ink ribbon 11...Ribbon frame 11a...Internal gear 12...Ink ribbon cover 13a, 13b, 13cm--Hook 14a. 14b, 14c... Planetary gear 15... Petal-shaped type wheel 21... Type wheel cassette 22...
・Servo motor 23... Drive gear 24... Print hammer 26. 27... Ink replenisher patent applicant Oki Electric Industry Co., Ltd. agent Patent attorney Takashi Kanakura @1 LoSaku2- @3- Wheel 4 to 5

Claims (1)

[Claims] 1. A printing device in which a petal-shaped type wheel is attached to the motor shaft of a servo motor and rotated, and the type is pressed by a print hammer onto a platen having a print medium via an ink ribbon to perform printing. The ink ribbon is a disc-shaped ink ribbon corresponding to the petal-shaped type wheel, the disc-shaped ink ribbon is fixed to a frame having an internal gear, and three planetary gears are meshed with the internal gear. The ink ribbon cover is rotatably attached to an ink ribbon cover, the ink ribbon cover is removably installed on the type wheel cassette of the petal type type wheel to form a whole, and the drive gear provided on the motor shaft of the servo motor is connected to the type wheel cassette of the petal type type wheel. A type wheel 2, characterized in that it is disposed so as to mesh with the three planetary gears from the center and that the attachment can be removed, the petal-shaped type wheel and the disc-shaped ink ribbon according to claim 1. A type wheel cartridge characterized by rotating at relatively different rotation speeds. 3. A type wheel cartridge according to claim 1, characterized in that the ink ribbon cover is provided with an ink replenisher for replenishing ink corresponding to the disc-shaped ink ribbon.