JPH05298628A - Recording device - Google Patents

Abstract

PURPOSE:To prevent the magnetized part of a scale from being damaged by holding a magnetic head on the scale detachably by a holding means and further providing a tension applying and fitting means which applies tension to the scale and fits it to the side plate of a recording device main body. CONSTITUTION:The scale 101 is fitted with two bearings 22 and 22 at a proper interval and those bearings 22 are provided with housings 24 having grooves which are sectioned almost in a semicircular shape by molding so that the housing can be fitted onto the bearings 22 by pressing. The housings 24 are fitted integrally with magnetic heads 102 and signal lines 103. The housings 24 are fitted onto the bearings 22 of the scale 101 by pressing and slidable along the scale 101 through the bearings 22. Consequently, the magnetized part of the scale is prevented from being damaged to prevent memory effect from being lost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device using a magnetic linear encoder.

[0002]

2. Description of the Related Art First, referring to FIG. 14, the entire recording apparatus using a conventional magnetic linear encoder will be described. The recording head 1 mainly includes an ink jet unit and an ink tank. .. The recording head unit 1 is preferably detachably attached to this recording apparatus, and a new recording head unit can be replaced when the ink in the ink tank is used up.

A carriage 2 on which a recording head unit 1 is mounted
Has a pin (not shown) that engages with a spiral groove of the lead screw 3 that rotates via a transmission mechanism (not shown) in conjunction with forward and reverse rotation of a carrier motor (not shown). Then, as the lead screw 3 rotates, the lead screw 3 is reciprocated in the directions of arrows a and b. In addition, the magnetic head 102 is scaled by the MR element (not shown in FIG. 14).
Read the magnetized part of.

The conveying roller 4 is arranged on the recording sheet 5 by an arrow c in FIG.
Direction, the recording sheet 5 is intermittently fed at the time of recording. The magnetic head 102 is connected to a flexible printed circuit board 103 for extracting an output signal from an MR element in the magnetic head to the outside, and a contact portion 104 is connected to a connector (not shown) so that a carriage is formed. It is connected to the substrate 6 mounted on the board 2.

Looking at the configuration of the conventional example from one point of view, a magnetic linear encoder conventionally used in a recording apparatus is
The scale of the magnetizing portion, the mounting metal fittings at both ends of the scale for attaching the scale to the main body of the recording apparatus, the magnetic head for detecting magnetism, and the signal transmission cable attached to the magnetic head are integrally configured. It was

To attach such a magnetic linear encoder to the main body of the recording apparatus, holes for attachment are made in the fixing members (side plates) on both sides of the main body, and both ends of the scale are inserted into the respective holes to form one unit. A method of fixing from the outside of the fixing member using a fixing metal fitting is adopted.

The above method will be described with reference to FIG. 15. First, the mounting members 21 and 21 fixed to both ends of the scale 101 are fixed to the recording apparatus main body (side plate).
The scales are fixed to the main body of the recording apparatus by inserting them into the holes formed in 100 and 100, respectively, and then inserting the fixing metal fittings 29 into the gaps between the fixing member 100 and the mounting member 21.

From another point of view, looking at the configuration of the conventional example, as shown in FIG. 16 which is a side sectional view of a magnetic linear encoder used in a recording apparatus, the magnetized portion 105 of the scale 101 is of the scale. The MR element 102a of the magnetic head 102 is arranged so as to read the magnetized portion.

Further, looking at the configuration of the conventional example from another point of view, the magnetized portion 105 of the scale 101 is not configured to be completely cut off from the outside.

[0010]

However, in the above-described fixing method, when the end of the scale is inserted into the hole of the fixing member 100, 100, the magnetized portion on the upper surface of the scale is the hole of the fixing member 100, 100. There is a possibility that the magnetized part may be damaged due to contact with the end of the magnet or contact with the worker's hand.

When the scale is fixed, the magnetic head 102 and the signal line (flexible printed circuit board) 103 mounted on the magnetic head 102 are connected to the scale 101.
Since it is integrated with, the fixing work must be handled with care, and there is also a drawback that the work cannot be performed efficiently.

Further, since the scale is fixed to the recording apparatus main body by the scale fixing metal fitting 29, the scale 10
It is not possible to keep the tension applied to 1 constant or adjust it to an appropriate tension, and the fixing member 100,
There is also a drawback that tension applied to the scale 101 tends to vary due to an error in manufacturing the scale 100 and the scale 101.

Further, in the conventional example, since the scale of the magnetic linear encoder has the magnetized portion on the upper surface, it is easy for the user to touch it, and the magnetized portion is damaged and the memory effect of the magnetizing is impaired. There was a point.

Furthermore, as described above, the scale 10
Since the magnetized portion 105 of No. 1 is not configured to be completely cut off from the outside, the magnetized portion 1 of scale 101 is
Between the 05 and the magnetic head 102, for example, fine dust such as paper dust may enter, and normal detection operation may not be performed.
In some cases, the magnetic head itself was destroyed. Further, the above-mentioned fine dust is not only paper dust, but also dust generated from the surroundings and the like depending on the installation location of the recording apparatus.

Therefore, a main object of the present invention is to provide a recording apparatus using a magnetic linear encoder, which solves the above-mentioned problems. The specific objects of the present invention are as follows.

An object of the present invention is to provide a recording apparatus which can efficiently perform the mounting of a magnetic linear encoder scale on the recording apparatus main body.

Another object of the present invention is to provide a recording apparatus constructed so that tension can be adjusted when the scale of the magnetic linear encoder is attached to the recording apparatus main body.

Still another object of the present invention is to provide a recording apparatus configured so that a user does not easily touch the magnetized portion of the scale of the magnetic linear encoder.

Still another object of the present invention is to provide a recording apparatus constructed so that fine dust cannot enter between the magnetized portion of the scale and the magnetic head.

[0020]

In order to achieve the above object, the present invention provides a scale in a recording apparatus using a magnetic linear encoder comprising a magnetized scale and a magnetic head movable along the scale. A recording device having a holding means for detachably holding the magnetic head, and a tension applying and attaching means for applying a tension to the scale and attaching it to a side plate of the recording apparatus main body. Is.

The holding means is composed of a bearing mounted on the scale at a distance and a housing for supporting the magnetic head, the section having a substantially semi-circular cross section having a size for press-fitting the bearing. Preferably, the tensioning and mounting means is a leaf spring arranged between the side plate and a mounting part fixed to the end of the scale so as to pull the scale against the side plate, or with respect to the side plate. It is preferably a tension-adjustable turnbuckle arranged between the side plate and a fitting fixed to the end of the scale so that the scale can be pulled.

Further, according to the present invention, in a recording apparatus using a magnetic linear encoder including a magnetized scale and a magnetic head movable along the scale, the magnetized portion of the scale is arranged on the back surface of the carriage. The characteristic recording device is adopted.

Furthermore, the present invention is a recording apparatus using a magnetic linear encoder comprising a magnetized scale and a magnetic head movable along the scale, so that the magnetic recording medium can be slidably attached to the scale. The recording apparatus is characterized in that it has a fine dust guard attached to the head.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the drawings. The material, shape, magnetization direction, etc. of the scale portion of the magnetic linear encoder suitable for use in the present invention will be outlined in advance. Fe-Cr-Co magnets are preferable as the magnet material of the scale portion. This magnet has magnetic properties equivalent to those of an alnico magnet, and is a material that overcomes the hard and brittle weakness of a permanent magnet, and a 0.1 mm wire or plate can be easily mass-produced by rolling or drawing. This magnet material is used for sputtering, vapor deposition, and CVD.
It is formed as a thin film formed by a film forming method such as the above, or is formed as an alloy product formed by sintering or a normal alloying method. As for the shape, the cross section is circular or rectangular (square).
Although it is a wire or plate having an arbitrary shape such as, it can be easily obtained at low cost by using the above-mentioned magnet material. Also,
The magnetization direction is preferably perpendicular magnetization in order to make the pitch fine (fine pitch is necessary when more precise dot control is required than in monochrome printing such as in color printing). The material, shape, magnetizing direction, etc. of the scale portion of the magnetic linear encoder suitable for use in the present invention are as described above, but the present invention, unless otherwise limited to the claims, It is not limited to the material, shape, magnetizing direction, etc. of the scale part. Further, as a magnetic detection head suitable for use in the present invention, an MR element, which is a magnetoresistive element made of an iron-nickel alloy, is preferable.
It is not limited to the element.

FIG. 1 is a perspective view showing a part of a scale of a magnetic linear encoder of the present invention, FIG. 2 is a perspective view of a magnetic head portion detachably attached to the scale, and FIG. 3 is a perspective view. It is sectional drawing seen from the direction of the arrow A of FIG. As shown in FIG. 1, two bearings 22, 22 are attached to the scale 101 at appropriate intervals. As shown in FIG. 2, a housing 24 having a groove having a substantially semicircular cross section formed by molding is provided so that the bearings 22 and 22 can be fitted by press-fitting. The magnetic head 102 and the signal line (flexible cable) 103 are attached to the housing 24 to be integrated. The housing 24 is pressure-fitted to the bearing 22 of the scale 101, and is slidable along the scale 101 via the bearing 22.

FIG. 4 is a partial sectional view showing a state in which the scale of the magnetic linear encoder of the second example of the present invention is attached to the recording apparatus main body. In FIG. 4, the scale 101
Both ends of the scale 101 are inserted and fixed in the holes formed in the fixing member (side plate) 100, but one end of the scale 101 uses the plate spring 27 to apply tension to the scale.
It is attached to 0. That is, the mounting molded component 25 is inserted from the outside of the side plate 100 via the leaf spring 27, and is connected and fixed to the mounting molded component 26 fixed to the end of the scale 101.

According to this fixing method, it is possible to prevent the magnetized portion from being damaged or worn by the contact of the operator's hand when the scale 101 is attached, and the leaf spring 27 can securely hold the scale 101.

FIG. 5 is a side view showing a state in which the scale of the magnetic linear encoder of the third example of the present invention is attached to the recording apparatus main body. In FIG. 5, the scale 101 is attached to the side plate of the recording apparatus main body by the turnbuckle 32. That is, one end of the scale 101 is inserted into the hole formed in the side plate 100 as in the second example described above, and then fixed with the fixing bolt 35 and the fixing nut 34.
The tension of the scale can be adjusted by these fixing bolts 35 and fixing nuts 34.

FIG. 6 is a side sectional view showing the magnetized state of the scale of the magnetic linear encoder of the fourth example of the present invention for protecting the magnetized portion. As shown in FIG. 6, in the fourth example, the magnetized portion 105 is provided on the lower surface of the scale 101, that is, the back surface of the carriage 2, and correspondingly, the magnetic head 102a is magnetized from below. Is arranged to read. As described above, by providing the magnetized portion 105 on the back surface of the carriage 2, loss of the memory effect due to contact by the user and damage to the magnetized portion 105 due to dust from the outside as in the conventional example is prevented. ..

FIG. 7 is a side sectional view of a magnetic linear encoder of the fifth example for protecting the magnetized portion. Although the scale 101 of the immediately preceding embodiment has an axial shape, as shown in FIG. 7, in this fifth example, the scale 106 shows an example in which a square bar-shaped magnetic body is used, and the magnetized portion 105 is By providing it on the back surface of the carriage 2, the loss of the memory effect due to the contact of the user and the damage of the magnetized portion 105 due to dust from the outside as in the conventional example is similarly prevented.

FIG. 8 is a side sectional view of a magnetic linear encoder of the sixth example for protecting the magnetized portion. In the sixth example, as in the fourth example of FIG. 6, the magnetized portion 105 is arranged on the lower surface of the shaft-shaped scale 101, that is, on the back surface of the carriage. On the other hand, the scale guide 107 is arranged so as to cover the entire circumference of the scale. This provides more complete protection against loss of memory effect. In addition,
The scale guide 107 can be formed separately or integrally with the carriage 2.

FIG. 9 is a perspective view of a recording apparatus using the magnetic linear encoder of the present invention. In FIG. 9, reference numeral 1001 indicates a fine dust shield provided on the magnetic head 102. The fine dust shield 1001 is a cap made of an elastic member such as rubber, and is a scale 101.
It is in a close contact state so as to remove fine dust and is slidably attached to the surface thereof so that the mechanical load does not become excessive. Since the other parts in FIG. 9 are the same as those described in FIG. 14 of the conventional example, detailed description thereof will be omitted.

FIG. 10 is a cross-sectional view showing details of the above-mentioned fine dust shield. The fine dust shield 1001 has a shape having a small diameter opening in the center, and is made of an elastic member such as rubber. The magnetic head 102 is the MR element 102.
a substrate 102b for forming a, the substrate comprising:
It is usually made of glass, a metal such as aluminum, or a molded product. As is apparent from FIG. 10, two fine dust shelters 1001 are attached to both ends of the magnetic head 102 in a close contact state, and the central opening thereof is in close contact with the scale.

FIG. 11 is a sectional view showing another example of the protection against fine dust. In this embodiment, the fine dust shield 1004 comprises a felt-like cap. This felt-like cap is attached to the magnetic head 102 in a close contact state and slidably attached to the scale 101 in a close contact state, as in the above-described example.

12 and 13 are perspective views showing still another example of the fine dust shield. In this example, a flat scale is used as the scale. The fine dust shield 1005 in FIG. 12 is made of an elastic member such as rubber, and the fine dust shade 1006 in FIG. 13 is made of felt. ..

[0036]

As described above, according to the present invention,
When attaching the scale to the fixing member, the scale and the magnetic head can be easily attached without damaging the magnetized portion. Further, the scale can be held with a constant tension, and the tension can be adjusted.

Further, according to the present invention, it is possible to prevent damage to the magnetized portion of the scale and prevent loss of the memory effect.

Further, according to the present invention, it is possible to prevent fine dust from entering the clearance between the magnetized portion of the scale and the magnetic head.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a scale of a magnetic linear encoder used in a recording apparatus of the present invention.

FIG. 2 is a perspective view of a magnetic head unit detachably attached to a scale.

3 is a cross-sectional view seen from the direction of arrow A in FIG.

FIG. 4 is a partial cross-sectional view showing a state in which a magnetic linear encoder scale is attached to a recording apparatus main body.

FIG. 5 is a side view showing a state in which the recording apparatus main body of the scale of the magnetic linear encoder is attached.

FIG. 6 is a side sectional view showing a magnetized state of the scale of the magnetic linear encoder for protecting the magnetized portion.

FIG. 7 is a side sectional view of another example of a magnetic linear encoder that protects a magnetized portion.

FIG. 8 is a side sectional view of a magnetic linear encoder of still another example for protecting the magnetized portion.

FIG. 9 is a perspective view of a recording apparatus using a magnetic linear encoder.

FIG. 10 is a cross-sectional view showing details of the fine dust guard of FIG.

FIG. 11 is a cross-sectional view showing another example of the protection against fine dust.

FIG. 12 is a perspective view showing still another example of the fine dust shield.

FIG. 13 is a perspective view showing still another example of the fine dust shield.

FIG. 14 is a perspective view of an entire conventional recording apparatus.

FIG. 15 is a perspective view showing a conventional magnetic linear encoder.

FIG. 16 is a sectional view of a conventional magnetic linear encoder.

[Explanation of symbols]

101 scale 100 side plate 102 magnetic head 22 bearing 32 turnbuckle 102a MR element 107 scale guide 103 flexible printed circuit board 105 magnetized portion 1001, 1004, 1005, 1006 fine dust shield

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshiaki Kanoki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Nobuaki Iwagami 3-30-2 Shimomaruko, Ota-ku, Tokyo Kya Non-Incorporated (72) Inventor Shigemitsu Tasaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yuichi Hirai 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hajime Yoshida 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shigeo Takenaka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (9)

[Claims] 1. A recording apparatus using a magnetic linear encoder comprising a magnetized scale and a magnetic head movable along the scale, having a holding means for detachably holding the magnetic head on the scale, and further comprising a scale. A recording apparatus having a tension applying and attaching means for applying tension to the side plate of the recording apparatus main body. 2. The recording apparatus according to claim 1, wherein the holding means is formed with a bearing mounted on the scale at a distance, and a cross section having a size such that the holding means is press-fitted into the bearing has a substantially semicircular shape. And a housing for supporting the magnetic head. 3. The recording apparatus according to claim 1, wherein the tension applying / attaching means has a leaf spring arranged between the side plate and an attaching part fixed to an end of the scale so as to pull the scale against the side plate. A recording device characterized by the above. 4. The recording apparatus according to claim 1, wherein the tension applying / attaching means is arranged between the side plate and an attachment part fixed to an end of the scale so as to pull the scale with respect to the side plate, and the tension can be adjusted. A recording device having a turnbuckle. 5. A recording apparatus using a magnetic linear encoder comprising a magnetized scale and a magnetic head movable along the scale, wherein the magnetized portion of the scale is arranged on the back surface of the carriage. apparatus. 6. The recording device according to claim 5, wherein the magnetized portion of the scale is covered by a protection means. 7. A recording device using a magnetic linear encoder comprising a magnetized scale and a magnetic head movable along the scale, the recording device being attached to the magnetic head so as to be slidable in close contact with the scale. A recording device characterized by having a fine dust shield. 8. The recording apparatus according to claim 7, wherein the fine dust repellent is an elastic member having an opening in the center that is in close contact with the scale. 9. The recording apparatus according to claim 8, wherein the elastic member is rubber or felt.