JPH0312559B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording device used in an XY plotter device, a drafting machine, a graphic writer, etc. that uses a pen as a printing means.

Conventional Structure and its Problems Conventionally, in a pen-type recording device, the method shown in FIG. 1 has been common as a method for pressing a pen against recording paper.

In FIG. 1, reference numerals 1 and 2 denote side plates, and a carriage 4 equipped with multicolored pens is mounted on a guide shaft 3 fixed between the side plates so as to be slidable in the direction of arrow X. This carriage 4 is equipped with a toothed belt 5.
One side of the carrier is fixed, and the carrier is transported in the direction of arrow X by the rotation of a pulley gear 7 fixed to the shaft of a carriage drive pulse motor 6 that rotates forward and reverse.

In FIG. 2, the pen 8 attached to the carriage 4 receives a force in the direction of arrow A by the pen lifting spring 9 via the pen holding lever 10, and the pen tip 1
1 is away from the recording paper 12. Note that the pen holding lever 10 can rotate around the support shaft 13.

Further, there is a pen holding spring 14 at the top of the pen 8, and when the electromagnetic plunger 15 is energized, the movable core 16 moves in the opposite direction of the arrow A, and the pen holding lever 10 is moved around the support shaft 13 in the opposite direction of the arrow A. , the pen lifting spring 9 is compressed, and the pen tip 11 is pressed against the recording paper 12 by the pen holding spring 14.

In addition, the electromagnetic plunger 15 has its convex shaft 18 attached to the carriage bearing part 19 and the electromagnetic plunger bearing part 2.
0 is attached to the support shaft 17 at the tip of the adjustment screw part 21.
An elastic holding part 22, which is rotatably held in the direction of arrow B in the figure and has a radial groove 23 for positioning, is fixed to the carriage 4 so as to guide the movable core of the electromagnetic plunger. Since the adjustment spring 24 pushes the electromagnetic plunger 15 in the direction of the arrow C, the position of the electromagnetic plunger 15 can be finely adjusted in the direction of the arrow C or in the opposite direction to the direction of the arrow C by the adjustment screw portion 21.

Further, the electromagnetic plunger 15 has an electromagnetic clutch portion 2.
5 are attached together. The electromagnetic clutch section 25 includes a yoke 26 and an excitation coil 27 located therein.
, a gear shaft 28 integrated with the yoke 26, and a gear shaft 28
A gear 29 is rotatable around the central axis and is always in mesh with the toothed belt 5, and a belt receiving roller 3 faces the gear 29 with the toothed belt 5 in between.
0 is attached integrally with the gear shaft 28, and the gear 29 and the toothed belt 5 are properly engaged.

In the above structure, when the carriage 4 is driven by the pulse motor 6, the toothed belt 5 meshing with the gear 29 moves in the opposite direction to the carriage 4. The gear 29 then idles around the gear shaft 28.
Next, when changing the color, when the electromagnetic clutch section 25 is energized, a magnetic path is formed around the excitation coil 27 through the yoke 26, gear shaft 28, and gear 29.
The gear 29 and the yoke 26 are tightly integrated. In the above state, if you apply a drive signal to the carriage drive pulse motor 6 and try to move it in the direction of arrow D, the gear 2
The toothed belt 5 on the side where the toothed belt 9 is engaged moves in the direction opposite to the direction of the arrow D. At that time, the gear 29 does not rotate, so the electromagnetic clutch portion 25 receives a force in the direction opposite to the direction of the arrow D, and the electromagnetic clutch portion The electromagnetic plunger 15, which is formed to move integrally with the electromagnetic plunger 25, receives a force in the direction of arrow E using the convex shaft 18 and the electromagnetic plunger bearing 20 as rotation axes. The movable core 16, which is positioned by the radial groove 23 of the elastic holding part 22 for this purpose, receives a force in the direction of arrow E, and the holding part 22 is elastically deformed in the direction of arrow C, thereby moving in the radial groove 23. At this time, by controlling the pulse signal applied to the carriage drive pulse motor 6, the movable core 16 can be moved to any position in the radial groove 23. At this time, since the tip of the movable core 16 is pulled up by the movable core spring 31, it does not hit the pen holding lever 10. The radial grooves 23 are formed at the same pitch as the pen holding levers 10 arranged corresponding to the pens of each color, and by moving the movable core 16 to any position in the radial grooves 23, the desired pen can be selected. 8, that is, you can select the color.

At this time, when the electromagnetic plunger 15 is energized, the movable core 16 moves in the opposite direction to the arrow A direction, and the pen holding lever 10 is moved around the support shaft 13 in the opposite direction to the arrow A direction against the pen lifting spring 9. For movement, the pen 8 is pressed against the recording paper 12 by a pen presser spring 14.

However, when printing, the electromagnetic plunger 15 is excited, but until the pen 8 comes into contact with the recording paper 12, the electromagnetic plunger 15 generates a force equal to the difference in force between the pen return spring 9 and the pen presser spring 14. However, from the moment the pen 8 comes into contact with the recording paper 12, the entire force of the pen return spring 9 is applied to the electromagnetic plunger 15. Moreover, the support shaft 1 of the pen lever 10
Due to the positional relationship between the movable core 16 and the pen return spring 9 relative to the pen return spring 9, the electromagnetic plunger 15 requires a force that is approximately twice the force of the pen return spring 9. Therefore, the electromagnetic plunger 15 requires a large force when attracting the pen. Therefore, an adsorption type electromagnetic plunger in which metals collide with each other is essential. Electromagnetic plunger 1
There was a drawback that a loud impact sound was generated every time 5 was excited.

OBJECT OF THE INVENTION The present invention overcomes the above-mentioned conventional drawbacks.
Structure of the Invention Aims to Provide a Pen-Type Recording Device with Quiet Printing Sound While Maintaining Basic Functions In order to achieve the above object, the recording device of the present invention provides a first movable recording device that presses the pen during recording. a second movable member driven by a driving means, the motion of the second movable member is transmitted to the first movable member, and the movement of the second movable member is transmitted even after the movement of the first movable member is stopped. The second movable member is provided with a carriage having an elastic member that connects both movable members so that the second movable member is movable.

DESCRIPTION OF EMBODIMENTS FIG. 5 is a structural diagram of a carriage of a pen-type recording device in a first embodiment of the present invention.

A plurality of pens 33 attached to a carriage 32
are each subjected to a force in the direction of the arrow F by the pen lifting spring 34, and press the pen holding spring 35, which rotates around the support shaft 37, until it comes into contact with the stopper 36. The support shaft 37 also serves as a rotation axis for the movable lead bar 38, and the movable lead bar 38 and the pen holder bar 3
5 is elastically connected by a printing pressure adjustment screw 39 and a printing pressure spring 40. Movable core bar 38
The stopper 47 is moved in the direction of arrow G around the support shaft 37.
It can be rotated until it comes into contact with. The movable core bar 38 is rotated by vertical movement of one leaky electromagnetic plunger 42 having a movable core 41. Furthermore, movable core 4
1 and the movable core bar 38 are normally not in contact with each other. An electromagnetic clutch 44 engaged with a timing belt 43 is fixed to a leaky electromagnetic plunger 42;
It swings together around a support shaft 45 and has a holding portion 46 for positioning. Note that the holding portion 46 is the same as the holding portion 22 of the conventional example.
48 is recording paper.

The operation of the pen-type recording apparatus of this embodiment configured as described above will be explained below.

The pen-pressing method for the recording paper of the pen-type recording device of this embodiment is as shown in FIGS. The pen bar 35, which is elastically integrated with the movable core bar 38 by the print pressure adjustment screw 39 and the print pressure adjustment spring 40, also rotates in the direction of the arrow G around the support shaft 37. Then, the pen 33 is pushed against the pen return spring 34 until it comes into contact with the recording paper 48 . After contact,
Even after the movement of the pen 33 stops, the movable core 41 rotates the movable core bar 38 against the printing pressure adjustment spring 40 to the position of the stopper 47, as shown in FIG. 6, and becomes stable. Therefore, the pen 33 can apply a constant pressure to the recording paper 48 using the printing pressure adjustment spring 40, and the pressure can also be varied using the adjustment screw 39. Regarding pen switching, the movement of the timing belt 43 causes the electromagnetic plunger 42 to swing around the spindle 45 by the electromagnetic clutch 44, and is positioned at the movable core bar 38 corresponding to each pen 33 by the holding plate 46. This is the same as in the conventional example.

As described above, according to the present embodiment, the pen return spring 34 only needs to support the pen 33, so a weak spring is sufficient, and therefore the pen pressure is almost the same as the pen bar 35.
This is the pressure received from That is, in the process of the movable core 41 pushing up the movable core bar 38, the force of the movable core 41 at the initial stage may be sufficient to push down the pen 33 against the elasticity of the spring 34. Since the role of the spring 34 is simply to support the pen 33 so that it does not fall, its elasticity is relatively weak, and the force of the movable core 41 is relatively small in the initial stage.

Generally, in an electromagnetic plunger, the force acting on the magnetic moving body (movable core 41) is approximately inversely proportional to the square of the distance between the magnetic moving body and the coil section, so a large force is applied in the initial stage when the magnetic moving body is far from the coil section. I can't get it. Therefore, if the movable core 41 is configured to have to be pushed with a large force at this initial stage, an electromagnetic plunger with a very large capacity will be required. However, in the configuration of this embodiment, the force with which the movable core 41 pushes up the movable core bar 38 is small at the initial stage of the pushing up process, and accordingly, the electromagnetic plunger can also have a relatively small capacity. Moreover, Pember 3
5 and the lever ratio of the movable core bar 38 to the support shaft 37, the required power of the electromagnetic plunger 42 may be even smaller. Electromagnetic plunger 4
The second type can be a magnetic leakage type that does not generate sound, or an adsorption type with an elastic spacer interposed to prevent metal collisions at the expense of power, and the stoppers 36 and 37 can be made of rubber, etc. If it is an elastic body, almost no collision noise will be generated, and therefore pen switching will be the same as before, and a quiet pen-driven recording device can be achieved.

Effects of the Invention As explained above, the pen-type recording device of the present invention includes a first movable member that presses the pen during recording;
a second movable member driven by a driving means; the motion of the second movable member is transmitted to the first movable member; and even after the movement of the first movable member is stopped, the second movable member This is a recording device equipped with a carriage that has an elastic member that connects both movable members so that the movable members can move, and the force required to drive the lever to press the pen against the recording paper with a constant force is much greater than in the past. An electromagnetic plunger that is weaker and has less force than the conventional one is sufficient. Therefore, it is possible to use an adsorption type electromagnetic plunger that uses a leaky type or an elastic spacer to avoid collisions between metals, so it is possible to realize a recording device that generates very little noise.

[Brief explanation of drawings]

FIG. 1 is a front view of the main parts of a conventional pen-type recording device, FIG. 2 is a side view of the main parts of the pen up-and-down mechanism in the same device, and FIG. 3 is a front view of the color changing mechanism in the same device. Figure 4 is a sectional view taken along line A-A of the radial groove.
FIG. 5 is a side view of a main part of a pen up-and-down mechanism of a recording device according to an embodiment of the present invention, and FIG. 6 is a side view of a main part of the same device when the pen is lowered. 1, 2... Side plate, 3... Guide shaft, 4, 32...
Carriage, 5, 43... Toothed belt, 6... Carriage drive pulse motor, 7... Pulley gear, 8, 33... Pen, 9, 34... Pen lifting spring, 10... Pen holding lever, 11... ...Pen tip, 12,48...Recording paper, 13,17,37,
45...Spindle, 14...Pen holder spring, 15,4
2... Electromagnetic plunger (driving means), 16, 41
...Movable core, 18... Convex shaft, 19... Carriage bearing section, 20... Electromagnetic plunger bearing section, 21...
...adjustment screw part, 22, 46...holding part, 23...
Radial groove, 24...adjustment screw, 25, 44...electromagnetic clutch portion, 26...yoke, 27...excitation coil, 28...gear shaft, 29...gear, 30...
Belt receiving roller, 31... Return spring, 35...
Pen bar (first movable member), 36, 47... stopper, 38... movable core bar (second movable member), 39... pen pressure adjustment screw, 40... pen pressure adjustment spring (elastic member).

Claims (1)

[Scope of Claims] 1. A pen that is slidably held so that its tip can come into contact with a platen, and a first movable member that has one end that engages with the rear end of the pen and presses the pen during recording. a pen restoring spring that urges the pen in a direction away from the platen; a second movable member driven by the electromagnetic plunger; and a stopper that prevents rotation of the second movable member. The first movable member and the second movable member are rotatable about the same support shaft, and the second movable member moves in a direction opposite to the protruding direction of the armature of the electromagnetic plunger. When the body of the second movable member and the other end of the first movable member are in contact with each other, the other end of the first movable member and the body of the second movable member are By providing the pressure members that press against each other, the motion of the second movable member can be transmitted to the first movable member, and when the armature of the electromagnetic plunger protrudes, the armature pushes against the end of the second movable member. By pressing , the second movable member and the first movable member rotate together, and the end of the first movable member pushes the pen, and the movement of the pen is blocked by the platen. Even after the movement of the first movable member is stopped, the second movable member is configured to be movable against the elasticity of the elastic member, and when the second movable member is in contact with the stopper, the elastic A recording device characterized in that the elasticity of the member is configured to press the pen toward the platen.