JPS634967Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pen holding mechanism in a pen-type recording device that can bring the pen into contact with and away from recording paper with minimal force.

Conventionally, a mechanism as shown in FIG. 1 has been generally devised as a mechanism for holding a pen for writing on recording paper so that it can come into contact with and separate from the recording paper. That is, the pen 2 facing the recording paper P conveyed by the feed roller 1 is slidably housed in a cylindrical pen holder 3, and the pen holder 3 is housed in a bearing 5 held in a carriage 4. The pen holder 3 is inserted into the recording paper P so that it can slide toward and away from the recording paper P. Further, the tip of the pen holder 3 is connected to the upper end of a lever 7 by a pin 6 so that this lever 7 can rotate around a rotation shaft 8, and the lower end of this lever 7 is connected to a solenoid 10 by a drive pin 9. It is fixed at 10a is a return spring for the solenoid 10. A spring 3a is installed inside the pen holder 3 and presses the inner surface of the rear cap 3b of the pen holder 3 and the rear end of the pen 2 in opposite directions.

In this pen holding mechanism, when the solenoid 10 is excited, the lever 7 swings to advance the pen holder 3 and bring the tip of the pen 3 into contact with the recording paper P. Further, the pressing force between the pen tip and the recording paper P is set by the elastic force of the spring 3a.

However, in the above pen holding mechanism, in order to bring the pen 2 into contact with the recording paper P, a plurality of parts consisting of the pen 2, pen holder 3, spring 3a, and cap 3b must be slid on the carriage 4. Must be. Therefore, the solenoid 10 needs to have the ability to move all of the plurality of parts, and the solenoid 10 must be made large, which hinders reduction in size and weight. In addition, the small pen-type recording devices used recently require quick operation of each part, but as described above, the structure in which the pen 2 and other parts operate together deteriorates followability. It cannot be denied that this leads to a decline in the functionality of the entire device. In addition, since the carriage 4 is equipped with the pen holding mechanism made up of the plurality of parts described above, the solenoid 10, etc., the entire carriage 4 becomes larger, the drive source for the carriage becomes larger, and the transport of the carriage 4 becomes faster. This was an obstacle to doing so.

The present invention eliminates the drawbacks of the conventional pen holding mechanism described above, and simplifies the mechanism, as well as
The purpose of this invention is to enable the pen to slide with the minimum necessary force and to reduce power consumption for sliding the pen.

In order to achieve the above object, the present invention mounts the pen itself so that it can slide independently on a carriage, operates only the pen using a hammer,
Furthermore, the present invention is characterized in that a return spring for the pen is provided between the pen and the carriage.

Embodiments of the present invention will be described below with reference to FIG. 2 and the following drawings.

FIG. 2 is a perspective view of the pen-type recording device, FIG. 3 is a plan view, FIG. 4 is a right side view, and FIG. 5 is a left side view. As shown in FIG.
2 and send it in the X direction, and also the pen 13
is moved in the Y direction, and desired line drawings such as characters, symbols, graphs, and designs are written on the recording paper P by appropriately controlling the combination of movements in the X and Y directions.

First, a mechanism for feeding the recording paper P in the X direction will be explained.

The rubber roller 11 is formed by coating a shaft 11a with NBR rubber or the like, and both ends of the shaft 11a are rotatably supported by side frames 14a and 14b. One end of this shaft 11a protrudes to the outside of one side plate 14b, and a driven gear 15 is fixedly installed at its tip (Figs. 3 and 4).
figure). Further, this driven gear 15 meshes with a rotatable intermediate small gear 16 provided on the outside of the side plate 14b, and furthermore, an intermediate large gear 16a formed integrally with this intermediate small gear 16 is engaged with a stepping gear. It meshes with a pinion gear 18 attached to the rotating shaft of the motor 17. Stepping motor 17
is fixed to the inside of the side plate 14b. Further, the pressure roller 12 is a rubber roller 1.
1, and each pressure roller 12 is rotatably attached to a roller shaft 19. Two roller shafts 19 are installed on the inner surfaces of retaining plates 20a and 20b attached to the outer surfaces of both side plates 14a and 14b. The holding plates 20a and 20b are attached to the outer surfaces of the side plates 14a and 14b so as to be able to move slightly, and a spring 21a is connected to the rear end of one of the holding plates 20a. The rear end is the side plate 14
(3rd,
(See Figure 5). Further, a spring 21b is connected to the rear end of the other holding plate 20b, and the rear end of this spring 21b is hung on the rear bent portion 14d of the side plate 14b (see FIGS. 2, 3, and 4). and,
The pressure rollers 12, which are attached to each of the holding plates 20a and 20b by the tension of the springs 21a and 21b, are pressed against both edges of the rubber roller 11 with a constant force. Also, the 6th
As shown in the figure, two guide plates 22a, 22b are provided below the stepping motor 17 at a constant interval.
The tip of 2b extends to the bottom of the rubber roller 11.

In the above configuration, when the stepping motor 17 rotates based on the paper feed control signal, this rotational force is transmitted from the pinion gear 18 to the intermediate large gear 16a, and the driven gear 15 is activated by the intermediate small gear 16 that rotates together with the stepping motor 17. be rotated. and,
The rubber roller 11 is rotationally driven by this driven gear 15. On the other hand, the recording paper P is inserted from the rear into the gap between the guide plates 22a and 22b, and guided to the lower side of the rubber roller 11 by the guide plates 22a and 22b. The rubber roller 11 and the pressure roller 12 that rolls in pressure contact with the rubber roller 11 sandwich the recording paper P at four locations on both edges, and the recording paper P is fed in the X direction as the rubber roller 11 rotates. . Further, as shown in FIG. 6, the pen 13 is placed opposite to a portion of the recording paper P held between both pressure rollers 12.

Next, the configuration of the pen holding mechanism will be explained.

The pen 13 has a short length (in this embodiment, the length is 20 mm).
As shown in FIGS. 8 and 9, this pen 13 contacts and separates from the rubber roller 11 at the top of the synthetic resin carriage 31. It is attached so that it can slide freely in the direction. The pen 13 is extremely lightweight and small, having only a conical nib and a cylindrical ink reservoir. The leaf spring 50 is engaged, and the pen 13
is pressed in a direction away from the rubber roller 11. On the other hand, a hammer 32 also made of synthetic resin is inserted in a groove 31a (see FIG. 8) formed at the rear of the carriage 31.
A projecting body 32a integrally formed at the lower end of the pen 13 is in contact with the rear end of the pen 13. This hammer 32 has an oval hole 32b (FIG. 10) bored therein, and a hammer shaft 33 having an oval cross section is inserted into this oval hole 32b. The hammer shaft 33 is inserted into a round hole 31b (FIG. 8) formed in the carriage 31, and both ends of the hammer shaft 33 are inserted into the side frame 14 of the recording device.
a, 14b (Fig. 2, Fig. 3) are rotatably supported. A cylindrical holder 34 is fitted to one end of the hammer shaft 33 on the outside of the side plate 14b, and a hook 34a integrally formed with this holder 34 is attached to the side surface of the side plate 14b. Operating plate 3 of self-holding solenoid 35
6, and the operating plate 36 includes a panel 37 that always urges the operating plate 36 to a non-adsorbing state.
One end (see Figure 3) is engaged. The solenoid 35 is capable of maintaining two stable states (positions) in the de-energized state, and when the operating plate 36 is in the attracted state, the force of the permanent magnet integrated with the operating plate 36 counteracts the force of the spring 37. The attracting state of the winning lever is maintained, while the force of the spring 37 overcomes the force of the permanent magnet to maintain the non-adsorbing state when the operating plate is in the non-adsorbing state.

On the other hand, the front lower part of the carriage 31 is fitted so as to be slidable on a round shaft 38 provided between the side plates 14a and 14b.
Figure 9).

Further, as shown in FIG. 10, the carriage 31 has holes 31c penetrating through both sides thereof, and a wire 39 is inserted into the hole 31c, and the wire 39 is connected to a screw 40 (see FIG. ) to the carriage 31. As shown in FIG. 7 (schematic system diagram), one end of this wire 39 is hung around a pulley 41 which is rotatably and inclinedly provided on the outside of the side plate 14b. The other end of the wire 39 is hung around a pulley 42 that is rotatably and horizontally provided on the outside of the side plate 14a, and is further wound around a winding pulley 43 that is rotatably installed on the outside of the side plate 14a. There is. Furthermore, the wire 3 wound around this winding pulley 43
9 is hung on a pulley 44 which is vertically and rotatably mounted on the outside of the side plate 14a, returns to the inside of the side plate 14a, and is held in tension with the other end of the wire 39 hooked on the pulley 41. spring 45
are connected via. Further, a driven gear 43a is integrally formed on the winding pulley 43, and this driven gear 43a meshes with an intermediate small gear 46 installed on the side plate 14a (third, fifth
(see figure). Further, an intermediate large gear 46a provided integrally with this intermediate small gear 46 is connected to a pinion gear 48 provided on the rotating shaft of the stepping motor 47.
It's meshing with each other. Note that this stepping motor 47 is fixedly installed inside the side plate 14a.

Next, the operation of the pen holding mechanism configured as described above will be explained.

When the stepping motor 47 operates according to the carriage drive command, this rotational force is transmitted from the pinion gear 48 to the intermediate large gear 46a, and the intermediate small gear 46, which rotates together with the intermediate large gear 46a, drives the driven gear 43a. The winding pulley 43, which is integrated with the driven gear 43a, rotates. As a result, the wire 39 forming a closed loop is driven,
The carriage 31 connected to the wire 39 is guided by the hammer shaft 33 and the round shaft 38 and slides in the Y direction. In addition, during the sliding process of the carriage 31, when the operating plate 36 of the solenoid 35 is in a suction state, the holder 34 and the hammer shaft 33 are rotated in the θ ₁ direction (FIG. 8) by the spring 37. The hammer 32 is offset from this hammer shaft 33.
At the same time, the hammer 32 is rotated and deflected in the θ ₁ direction, and the protrusion 32a (FIG. 10) of the hammer 32 is moving away from the rear end of the pen 13. Therefore, in this state, the pen 13 is pushed against the rubber roller 1 by the force of the leaf spring 50.
1, the pen tip moves away from the recording paper P and no writing is performed. and,
From this state, when the solenoid 35 is energized to cancel the attraction force of the permanent magnet of the operating plate 36 in the attraction state,
The force of the spring 37 causes the holder 34 and the hammer shaft 33 to rotate in the θ ₂ direction (FIG. 8), and the protrusion 32a of the hammer 32 that rotates together with the holder 34 rotates the rear end of the pen 13. This force pushes the pen tip toward the rubber roller 11 and contacts the surface of the recording paper P. In this state, the stepping motors 17 and 47 are operated as appropriate based on the information writing command, and the recording paper P and/or the carriage 31 are
When is moved, characters, symbols, etc. are written on the recording paper P according to the command. In addition, in order to pull back the pen 13, the drive plate 3 is connected to the coil of the solenoid 35.
When electricity is applied in the direction to attract the pen 13, the pen 13 immediately separates from the recording paper P. (In other words, by switching the current direction of the coil of the solenoid 35, the drive plate 36 is switched between the attracted state and the non-adsorbed state.) As described above, according to the present invention, the solenoid 35
is activated, and the hammer 32 is activated by the hammer shaft 33.
When the pen 13 rotates, the pen 13 moves independently on the carriage 31, comes into contact with the rubber roller 11, and separates from the rubber roller 11. As a result, the weight of the object operated by the solenoid 35 is minimized, so that the pen 13 can operate quickly, the recording speed of the entire recording apparatus can be increased, and the functionality can be improved. Further, since the solenoid 35 to be used may be disposed outside the carriage 31, the carriage can be made smaller and lighter and can be transferred at high speed. Furthermore, since the tip of the pen is engaged with a spring member, this spring member plays the role of a guide member and suppresses the play that occurs when the pen slides. It is possible to provide a pen-type recording device in which positioning is performed with high precision and print quality is good.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the main part showing a conventional pen holding mechanism, Fig. 2 and the following show embodiments of the present invention, Fig. 2 is a perspective view of a pen-type recording device, and Fig. 3 is its perspective view. A plan view, Fig. 4 is a right side view, Fig. 5 is a left side view, Fig. 6 is an explanatory diagram showing the writing section, Fig. 7 is a schematic system diagram showing the carriage movement mechanism, and Fig. 8 is a pen. FIG. 9 is a rear perspective view of the holding mechanism, FIG. 9 is a front perspective view thereof, and FIG. 10 is a longitudinal sectional view of the pen holding mechanism. 11...Feed roller, 13...Pen, 31...
Carriage, 50...plate spring, 32...hammer, 33...hammer shaft.

Claims (1)

[Scope of utility model registration request] By arranging a pen slidably held in a carriage to face the recording paper held and conveyed by a rotationally driven feed roller, and moving the carriage in a direction perpendicular to the conveyance direction of the recording paper, In a pen-type recording device that writes on the recording paper with a pen, a spring member that engages with the tip of the pen and presses the pen in a direction away from the feed roller; A pen-type recording device comprising: a hammer that abuts an end and rotates to bring the pen into contact with a feed roller; and a drive means provided outside the carriage that rotates the hammer.