JPS5933654Y2 - Printer ink roller mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the ink roller mechanism of a printer, and in particular, the ink roller unit, which is an integrated ink roller cover and ink roller, can be easily attached to the printer body by so-called snap-in fitting. In addition, by using the member that presses the ink roller against the type wheel and the holding means for the ink roller unit, the number of parts can be reduced and the configuration simplified, making manufacturing easy, inexpensive, and easy to handle. The purpose of this invention is to provide an ink roller mechanism with good performance.

The details of the present invention will be explained below with reference to an embodiment shown in FIGS. 1 to 3.

In the figure, 1 is an ink roller impregnated with ink, 2 is a shaft fixed to the ink roller, and 3 is a synthetic resin type ink roller cover. is held freely rotatable.

Further, the notch 5 has a diameter smaller than the diameter of the shaft 2 near its entrance, and by press-fitting the shaft 2 into the notch 5, the shaft 2 is prevented from falling out from the ink roller cover 3. It is held firmly in place and is also held movable within the notch 5 by a predetermined amount only in the direction of arrow A in FIG.

Incidentally, after the shaft 2 is press-fitted, the entrance of the notch 5 may be completely closed by thermal welding if necessary.

Reference numeral 6.6 denotes a knob integrally formed on the circumferential surface of the ink roller cover 3, and 7a and 7b denote flat plate portions provided at the lower part of the circumferential surface of the ink roller cover 3. It functions as a positioning member to prevent the cover from rotating when attached to the printer main body 8, and as shown in line A-A' in FIG. The line segment connecting them is ink roller 1.
The ink roller cover 3 (ink roller cover) U) holding the ink roller 1 is configured to be below the lowest end of the ink roller 1, and is formed so that the desk surface will not be stained with ink even if the ink roller cover 3 (ink roller cover) U) holding the ink roller 1 is placed on a desk or the like. has been done.

Reference numeral 8 denotes a printer body that incorporates a desktop electronic computer and a printer mechanism, as shown in Figures 2 and 3.
A recess 10 and a square hole 11 located at the center of the recess 10 are formed in the bottom plate 9, and a type wheel 12 is positioned so as to face the square hole 11.

13... are holding arms (holding means) having hook-shaped elastic tips provided at both ends of the square hole 11 in the longitudinal direction, and the two holding arms 13.13 are arranged in a substantially straight line. The shafts 2 and 2 face each other, and the facing interval is set to be smaller than the diameter of the shaft 2 by a predetermined amount.

Reference numeral 13a designates the tip of the holding arm, which is configured to have a tapered surface expanding toward the type wheel 12 at its lower part so as to press the shaft toward the type wheel 12 when the shaft 2 is loaded. .

Note that 14.14 is a vertical wall of the bottom plate 9 provided on the side of the square hole 11.

As is clear from the above explanation, in order to attach the ink roller unit to the printer body 8, pinch the grips 6, 6 of the ink roller cover 3 with your fingers, and then Both ends of the protruding shaft 2 are press-fitted between the holding arms 13 and 13 (snap-in fitting).
Then, after the holding arm 13.13 is elastically deformed and the shaft 2 is inserted, it returns to its original state and presses and holds the shaft 2 toward the type wheel 12 by the tapered surface of the tip portion 13a, and the ink roller 1 is moved to an appropriate position. It comes to be pressed against the type wheel 12 by elastic force.

The ink roller 1 also rotates as the type wheel 12 rotates, so that ink is evenly applied to the type surface of the type wheel 12.

As is clear from FIG. 2, the ink roller cover 3 closes the rectangular hole 11 in the bottom plate 9 of the printer main body 8 and constitutes a part of the outer casing of the printer main body 8.
It is positioned in the recess 10 so as to be at the same height or slightly lower than the surface of the bottom plate 9, and if necessary, it can be easily removed by pinching the knob 6.6 of the ink roller cover 3 with your fingers or the like and pulling it upward. The ink roller unit can be removed from the printer main body 8.

As shown diagonally above, according to the present invention, an ink roller unit in which an ink roller and an ink roller cover are integrated,
Not only can it be extremely easily attached to the printer body by snap-in fitting, but it is also easy to remove.

Further, the holding means for the elastic ink roller unit of the printer main body has holding arms that are spaced narrower than the diameter of the ink roller shaft and that face each other between the respective free ends that are arranged in a substantially straight line. The ink roller unit is made extremely simple as there is no need to attach a pressing means to the ink roller unit, as the ink roller is pressed against the type wheel by expanding tapered surfaces on the type wheel side at the leading edge of the image. It can be made into a shape that is easy to manufacture.

Further, since the holding means of the ink roller unit also serves as the pressing means of the ink roller, the structure of the printer main body side does not become complicated.

Furthermore, since the tips are facing each other and the distance between them is narrower than the shaft diameter, the mounting direction of the shaft and the direction of swinging after mounting are approximately the same, making the mounting operation simple and easy. .

Overall, the present invention has a remarkable practical effect in that it can provide an ink roller mechanism that is easy to manufacture, inexpensive, and has good handling and workability, and is particularly suitable for use in small-sized printers.

In the above embodiment, the type wheel was illustrated as a type drum used in a parallel type printer, but it goes without saying that the present invention can also be applied to a serial type printer in which the type wheel moves in the axial direction.

In addition, the shape of the holding means may be modified in various ways other than the above-mentioned embodiments without departing from the technical idea of the present invention, and all of these are, of course, included in the scope of the registered claims. be.

[Brief explanation of the drawing]

The drawings all relate to one embodiment of the present invention; Fig. 1 is a perspective view showing the ink roller unit, Fig. 2 is a cross-sectional view of the main part showing the installation state, and Fig. 3 is a bottom view of the main body of the printer. be. 1...Ink roller, 2...Shaft, 3.
... Ink roller cover, 8 ... Printer body, 9 ... Bottom plate, 10 ... Recess, 11 ... Square hole, 12 ...Type wheel, 13...Holding arm (holding means).

Claims (1)

[Scope of utility model registration request] It consists of an ink roller cover that rotatably holds the shaft of the ink roller, and an elastic holding means for the shaft that is provided in the printer body facing the type wheel, and the holding means is arranged in a substantially straight line. The respective free ends have holding arms that are opposed to each other and spaced apart narrower than the diameter of the shaft, and tapered surfaces in an expanded shape are formed on the type wheel side of the image front end, and the shafts are connected to both sides. An ink roller mechanism for a printer characterized in that the ink roller is brought into contact with a tapered surface to constantly press against a type wheel and also to hold a shaft.