JP2511656B2 - Recording device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device for recording characters and lines on a recording surface based on recorded information, and more particularly to a displacement detecting mechanism of a recording pen thereof.

[Conventional technology]

The recording device performs desired drawing recording based on recording (plotting) information of a control device such as a computer. In this case, the recording pen repeatedly moves up and down according to a recording signal. Monitoring the vertical displacement of the recording pen is very convenient in various respects such as maintaining the pen pressure of the recording pen or soft landing of the recording pen.

As a conventional recording pen displacement detection mechanism for this type of device,
For example, there was an apparatus described in the specification of Japanese Patent Application No. 58-193618 filed by the applicant earlier. In this apparatus, a magnet is provided on a movable body that is displaced in conformity with a recording pen, and a Hall element that acts on the magnet is provided at a predetermined position. When the magnet is displaced according to the displacement of the recording pen, the magnetic line of force penetrating the Hall element changes and the displaced position of the recording pen can be detected.

[Problems to be solved by the invention]

By the way, such a device has a drawback that it is effective when the displacement stroke of the recording pen is small, but cannot be dealt with when it is large. That is, the lines of magnetic force generated by the magnet decrease sharply as the distance increases, so a relatively large displacement stroke cannot be measured.

The present invention has been made to eliminate this drawback.

[Means for solving problems]

For this reason, in the present invention, it is formed in a taper shape with the U-shaped yoke provided on either the movable portion of the pen block that matches the displacement of the recording pen or the base that is the non-displacement portion of this pen block. And a yoke portion having a magnet, and is provided on either the base of the pen block or the movable portion of the pen block so as to move relative to the opening and the inside of the yoke portion according to the displacement of the recording pen. And a displacement detecting mechanism including a magnetic sensitive element.

[Action]

7 to 9 are explanatory views showing this displacement detecting mechanism. U-shaped yoke 81 and a magnet formed in a tapered shape
And a magnetic sensitive element (Hall element) 83 attached to a Hall element mounting member 84 which is capable of relatively moving the inside and the opening of this yoke section according to the displacement of the recording pen. Tapered magnet
Due to 82, the cap distance of the U-shaped yoke 81 changes depending on the position, and at the same time, its magnetic flux density also changes depending on the position as shown in FIG. FIG. 9 is an output voltage diagram when the Hall element 83 moves in the yoke portion, and displacement can be easily detected by extracting this output voltage.

〔Example〕

1 to 6 are configuration explanatory views showing one embodiment of the present invention.

In the figure, 1 is a recording surface formed on a recording device, 2 is a recording pen, 3 is a pen holder member, and has a pen holder portion 31, a slide bearing 32, and a pen arm 33. Four
Is a pen up / down member composed of a pen up / down means 41, a pen up / down spring mechanism 42 and a pen holder member slide shaft 43, 5 is a pen cap member consisting of a pen cap 51, a pen cap cam 52 and a pen cap spring 53, and 6 is a cap feeding motor 61. , Motor drive shaft 62, pen lift cam
A pen cap pushing member 63 including a bearing 63 and a bearing 64 is attached to a pen driving member (not shown) of the apparatus at the base of the pen block. Reference numeral 8 denotes a displacement detection mechanism, a U-shaped yoke 81, a magnet 82 formed in a tapered shape,
It has a hall element 83 and a hall element mounting member 84.

First, the configuration of the pen block will be described with reference to FIG.

The base 7 is attached to the pen driving member of the apparatus as described above. Therefore, the pen block attached to the base 7 is configured to be freely movable on the recording surface of the apparatus. Further, this base 7 is provided with a displacement detecting mechanism 8 which will be described later.
Is the reference position of.

The recording pen 2 is detachably attached to the pen holder portion 31 of the pen holder member 3, and recording is drawn when the tip of the recording pen 2 contacts the recording surface 1.

The pen holder member 3 is attached to the base 7 at the slide bearing 32 and the rear end of the pen arm 33 via the pen holder member slide shaft 43 of the pen up / down member 4 and the pen up / down spring mechanism 42, respectively. Therefore, the pen holder member 3 has a pen holder member slide axis center.
It is configured to slide up and down by 43 and the pen cap spring 53.

The pen up / down member 4 is attached to a predetermined position of the base 7. The pen up / down means 41 composed of a pen solenoid or a moving coil is connected to the pen arm 33 of the pen holder member 3, and therefore the pen holder member 3 can be driven up and down.

The pen up / down spring mechanism 42 is for holding the pen holder member 3 in a predetermined position when the pen up / down means 41 is in the non-excited state. In this embodiment, the recording pen 2 is held in the up position. There is.

The pen cap member 5 is connected to a pen cap pushing member 6 described later.

When the recording pen 2 is raised, the pen cap 51 is extended, and by lowering the recording pen 2, the pen cap is performed.

The 53 pen cap spring is the pen cap 51.
Further, a biasing force is generated when the tip of the recording pen 2 is held.

The pen cap pushing member 6 has a cap feeding motor 61. The motor 61 has a motor internal mechanism 611 and a motor drive shaft 62, both of which are threaded and engaged with each other.

Therefore, the motor drive shaft 62 moves back and forth as the motor internal mechanism 611 rotates. Further, a clutch mechanism (not shown) is built in the pen cap pushing member 6 so that the pen cap pushing member 6 rotates when the forward / backward movement of the motor drive shaft 62 is blocked.

In the displacement detecting mechanism 8 of this embodiment, a U-shaped yoke 81 and a tapered magnet 82 are provided below the pen arm 33 of the pen holder member 3, and the Hall element is used.
83 is provided on the base 7 via a Hall element mounting member 84.

Next, the operation of the apparatus of this embodiment will be described with reference to FIGS.

1 to 6 are operation diagrams from the pen down state to the pen cap state.

FIG. 1 shows a pen-down state. The pen up / down means 41 of the pen up / down member 4 is excited and the recording pen 2
Is in contact with the recording surface 1. At this time, the pen cap pushing member 6 is not excited. In addition, the yoke 81 of the displacement detection mechanism 8
The positional relationship between the Hall element 83 and the Hall element 83 is at the highest position as shown in the figure.

FIG. 2 is a pen-up state diagram at the time of no recording. The pen up / down means 41 of the pen up / down member 4 is not excited, and the pen up / down spring mechanism 42 holds the pen holder member 3 and the recording pen 2 in the up position. Therefore, the Hall element 83 of the displacement detection mechanism 8 is displaced downward. The position of the recording pen 2 can be monitored by supplying this displacement output to an electric circuit section (not shown).

FIG. 3 shows the pen holder pushing member 6 in the state shown in FIG.
FIG. 7 is a state diagram in which the cap feeding motor 61 is excited.

The motor drive shaft 62 is pushed out and the pen cap member 5 is also pushed out.

In the state shown in FIG. 3, the pen cap cam 52 of the pen cap member 5 pushed out is the convex portion of the pen holder member 3.
The state of contact with 311 is shown. At this point, the motor drive shaft 62 stops moving forward and the pen lift cam 63 starts rotating.

FIG. 4 is a state diagram in which the motor drive shaft 62 starts to rotate and therefore the pen lift cam 63 acts. The pen lift cam 63 is provided with a pin 641 so as to rotate approximately 180 degrees, and engages with a pin stopper 521 formed at the rear end of the pen cap member 5.

In this state, the pen lift cam 63 pushes up the roller 312 protruding to the lower rear end of the pen holder member 3. Therefore, the pen holder member 3 and the recording pen 2
Is supported in the highest position. At the same time, the Hall element 83 of the displacement detection mechanism 8 is also positioned at the bottom and is output to the electric circuit section. When this happens, the motor drive shaft 62
The contact of the convex portion 311 with 31 is released, and the forward movement is started again.

FIG. 5 shows a time point when the forward movement is completed, and the rear end portion of the pen cap cam 52 of the pen holder member 5 is in contact with the convex portion 311 of the pen holder portion 31. at this point,
The cap feeding motor 61 is not excited. The pen cap 51 of the pen cap member 5 is extended right below the tip of the recording pen 2. FIG. 6 shows a state in which the pen holder member 3 and the recording pen 2 are lowered by the pen cap spring 8 from the state shown in FIG. 5 and the pen cap is performed. At this time, the displacement detection mechanism 8 checks whether or not the pen cap is normally performed.

The operation from the pen cap state to the pen down state is achieved by performing the reverse operation of the series of operations described above. That is, in FIG. 6, the cap feeding motor is excited in the opposite direction and rotates in the opposite direction. Therefore, the motor drive shaft 62 starts to move backward. Therefore, the front end portion of the pen cap cam 52 of the pen cap member 5 is located at the pen holder portion.
The pen lift cam 63 is rotated by coming into contact with the convex portion 311 of 31. Therefore, the pen holder member 3 and the recording pen 2 are pushed up to the highest position.

〔The invention's effect〕

As described above, according to the present invention, a pen block having a displacement detecting mechanism having a relatively long displacement stroke can be realized with a simple structure.

[Brief description of drawings]

1 to 6 are configuration explanatory views showing an embodiment of the present invention,
7 to 9 are explanatory views for explaining the operation of the present invention. 1 ... Recording surface, 2 ... Recording pen, 3 ... Pen holder member, 4 ...
Pen up / down member, 5 ... Pen cap member, 6 ... Pen cap pushing member, 7 ... Base, 8 ... Displacement detection mechanism

Claims (1)

(57) [Claims] 1. A recording apparatus having a pen block for contacting and separating a recording pen from a recording sheet to perform desired recording on the recording sheet, in order to detect displacement of the recording pen of the pen block. Is magnetized in a direction perpendicular to the displacement direction of the recording pen and a yoke having an opening on either the movable part of the pen block or the base that is the non-displaced part of the pen block that matches the displacement of And a yoke portion formed of a magnet attached to the yoke and formed in a taper shape along the displacement direction of the recording pen; and (b) the inside of the recording pen inserted through the opening of the yoke portion. Displacement detection mechanism including a magnetic sensitive element provided on either the base of the pen block or the movable portion of the pen block so as to move relative to the displacement of the pen block. A recording device equipped with the above pen block.