JPH0126346B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to impact printing devices, and more particularly to wire impact printing devices having a plurality of wires that selectively impact a recording medium.
This invention relates to a matrix print head and its assembly method.

2. Description of the Related Art A wire matrix type printing device is used as a device for printing output data from an information processing device at high speed. In general, not only wire matrix type printing devices but also impact type printing devices have many mechanical elements, so their printing speed is much slower than the data processing speed of an information processing device.

However, compared to other impact-type printing devices such as drum-type line printers with typefaces, wire matrix printing devices are capable of printing characters and symbol patterns of all shapes depending on the combination of output dots. Moreover, it is widely used in the field of printing devices because it has the advantage of being able to produce a large number of hard copies at a relatively high speed and at the same time if necessary.

For example, the printing head applied to this type of wire matrix type printing device is
The ones described in Japanese Patent Application Laid-open No. 1820 or Japanese Patent Application Laid-open No. 42614/1983 are known. In any case, this type of wire matrix print head is
Basically, it consists of a plurality of wires arranged in a predetermined manner, a wire guide means for aligning and guiding these wires, a plurality of electromagnetic actuation means that are selectively activated in accordance with the information to be printed, and this electromagnetic actuation means. It comprises a plurality of armatures for actuating the wires and other ancillary elements.

Both wire matrix print heads
Electromagnetic actuation means, such as a core with a yoke coil attached to an armature, are each attached to the base material by screws. In particular, in the latter printing head, the elastic member having a plurality of arms is attached at its center to the upper end of the wire guide means with a single screw, and the moment of force applied to the armature and the stroke of the wire are controlled by this screw. I try to adjust them at the same time.

During printing, the electromagnetic actuating means is selectively driven in accordance with the dot pattern of output information to attract the armature and impact the wire. The wire then pops out from the tip of the print head and hits the ink ribbon. Thus, characters, symbols, etc. consisting of combinations of dots are printed on the printing paper.

By the way, malfunctions of the print head that occur during this printing operation include jamming of the printing paper, the ink ribbon getting caught on the wire, causing the wire to break or bend, and electrical causes. As a result, the coil becomes defective and cannot function as an electromagnetic actuating means.

In the case of failure of such elements of the wire matrix print head, the corresponding wires, coils, etc. can be replaced. However, although it is relatively easy to replace only the wire, it is necessary to remove the coil and the electromagnetic actuating means including the same from the base material.
Also, it is difficult to newly attach the electromagnetic actuating means to the base material, and the work requires skill.

Also, regarding the latter print head mentioned above,
Since a screw for adjusting the strokes of multiple wires at the same time passes through the center of the wire guide means, it is necessary to arrange the multiple wires avoiding this screw and the screw engagement part. The curvature of the wire must be increased. In addition, when the curvature of the wire becomes large, it becomes difficult to assemble the printing head, especially the wire guiding work, and the rigidity of the wire decreases during printing, which increases the stress on the wire, especially at the base, causing the wire to break. It's easy.
Furthermore, as the number of wires increases, the width of each arm becomes narrower, which not only makes it impossible to obtain sufficient holding force, but also causes load to concentrate on the center and screws, causing strength problems in the structure of the screws and screw engagement parts. becomes.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to simplify the components of a wire matrix print head and to provide a simple wire matrix print head with a structure that allows for easy replacement of the components in one unit for maintenance or the like. The aim is to provide a head.

Another object of the present invention is to provide a method for assembling a wire matrix print head which allows the wire matrix print head to be assembled easily and accurately.

Still another object of the present invention is to provide a wire matrix type printhead and method of assembling the same, which allows easy positioning and attachment of the wire-driving magnet assembly to the housing plate.

Still another object of the present invention is to provide a wire matrix type print head and method of assembling the same, which facilitates guiding of multiple wires within a wire guide assembly.

Yet another object of the present invention is to provide wires in which the stroke of each wire can be easily adjusted individually and which improves the concentration of load from the wires to the center.
An object of the present invention is to provide a matrix type print head and a method for assembling the same.

In summary, the wire matrix print head of the present invention is constructed from a simplified assembly of parts. That is, the printhead includes a wire guide assembly, a first plate, a second plate, a plurality of magnetic structures, and a shock absorbing member.

The wire guide assembly is composed of a head housing having a generally circular shape with a hollow interior and a wire guide section connected to the head housing. is inserted and fixed.

The second plate has a function as a casing or a holding cover member for the components of the printing head, such as the above-mentioned magnetic structure, and the back surface of the second plate has a plurality of magnet structures arranged in a predetermined manner. An engaging portion is provided for regularly positioning. In a preferred embodiment, a plurality of protrusions are provided concentrically on the back surface of the plate in correspondence with the arrangement positions of the magnet structures, and the upper ends of the magnet structures are engaged between the protrusions.

The wire guide assembly is fixed to the first plate, and the head housing is located on one side of the first plate, and the wire guide section is located on the other side. A first engaging portion is provided on the first plate for regularly arranging the plurality of magnet components, and a second engaging portion is provided on the outer surface of the head housing. In a preferred embodiment, the first plate is described as a housing plate, the first engaging portion is described as a concentric hole, and the second engaging portion is described as a groove.

The magnetic arrangement serves as an actuating means for driving the wire. In a preferred embodiment, this magnet structure includes a core in which a plurality of magnetic members are stacked, a yoke plate fixed by sandwiching the core, a coil inserted into the core,
It has an armature that is attracted to the core by energizing the coil, and a wire that is driven by the armature. Further, the yoke plate is provided with a third engaging part that is engaged with the first engaging part, and a fourth engaging part that is engaged with the second engaging part. The shock absorbing member absorbs the return energy of the armature.

When assembling this print head, the wire is guided along the groove of the wire guide, and the engaging parts of the plurality of magnet structures are respectively connected to the engaging parts of the first plate and the head housing. Position and arrange. Further, the shock absorbing member is arranged in a predetermined manner, and the engaging portion of the second plate is engaged with a predetermined portion of the magnet structure, so that the second
plates are installed. In the embodiment described below, the second plate is fixed to the first plate by screws at a plurality of positions on its periphery so as to sandwich a plurality of magnet structures. Also,
A screw is provided corresponding to the arrangement position of the armature on the second plate, and by operating this screw, the stroke of the wire or the armature can be adjusted.

According to the present invention, the components of the print head can be simplified, and the magnet structure can be easily held, replaced, etc. by simply removing the second plate. Furthermore, when arranging and attaching the magnetic components on the first plate, positioning and attachment can be easily performed by simply aligning the engaging portions. Further, when guiding the wire to the wire guide assembly, the wire can be guided very easily by simply inserting the wire along the groove of the wire guide.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of a wire matrix print head (hereinafter simply referred to as print head).

As will be described later, the disc-shaped plate 1 functions as a casing or a holding cover for the components of the print head placed at predetermined positions. Screw holes 101 are provided at six locations around the plate 1. A screw 10 is inserted into each screw hole 101.
3 is inserted. The screw holes 101 correspond to screw holes 713 provided in the housing plate 7, which will be described later, and the tips of the screws 103 are inserted into these screw holes 713.

On the inside of the plate 1, 24 screw holes 102 are provided circumferentially. Screws 104 are inserted into these screw holes 102. As described later, screw hole 1
The number 02 corresponds to the number of wires 80, in other words, the number of magnet components 8 that drive the wires, and by adjusting the insertion degree of the screw 102, the stroke of the armature 82 of the magnet component 8 can be adjusted. Each can be adjusted individually.

The structure on the back side of the plate 1 also has a configuration characteristic of this embodiment. In Figure 2,
The structure of the back side of this plate 1 is shown. As mentioned above, six screw holes 101 and twenty-four screw holes 102 penetrate through the hole. And 1 on the outer periphery
A total of 24 pairs of protrusions 105 are provided, two pairs each. Each pair of projections 105 corresponds to the number of magnetic structures 8. The upper end of the yoke plate 81 of the magnet structure 8 is engaged between the protrusions 105, and the upper side of the magnet structure 8 is aligned (FIG. 8).

In addition, on the back side of plate 1, there are 3
Three protrusions 106 are provided on the outer periphery of the three protrusions 107. Here, the protrusion 107 functions to align the presser plate 2 and the damper rubber 3, which will be described later, and the protrusion 106 functions to align the presser rubber 4 and the leaf spring 6.

Plate 1 having such a structure can be manufactured by known plastic molding techniques.

A presser plate 2, a damper rubber 3, a presser rubber 4, a mass 5, a leaf spring 6, etc. are arranged below the plate 1.

The presser plate 2 is made of a disc-shaped member made of stainless steel, and is provided with holes 21 at three locations and 24 fins 22 toward the center thereof. 3
The holes 21 at the locations correspond to the protrusions 107 of the plate 1, and the protrusions 107 engage with these holes 21,
The holding plate 2 is aligned.

The damper rubber 3 is a disc-shaped member made of rubber,
It has the same shape as the presser plate 2. That is, as described above, three holes 31 and 24 fins 32 are provided.

The screw 104 engaged with the plate 1 defines the stroke of the armature 82, that is, the return position, and this is done via the presser foot 2 and the damper rubber 3.

The presser rubber 4 has a ring shape and has holes 41 formed at three locations. This hole 41 corresponds to the protrusion 106 of the plate 1, and the hole 4 corresponds to the protrusion 104.
1 is engaged, and the presser rubber 4 is positioned.

The leaf spring 6 has an outer periphery having the same shape as the presser rubber 4, has holes 61 at three locations, and has 24 fin-like portions 62 provided toward its center.
The position of the hole 61 corresponds to the projection 106 of the plate 1 similarly to the presser rubber 4. A mass 5 is brazed and fixed to the upper side of each fin-like part 62, and a mass mold 51 (FIG. 7) is bonded to the lower side of this fin-like part 62. Here, the mass 5 is constituted by an L-shaped member made of iron or stainless steel, and functions as a mass member for the kinetic energy when the armature 82 returns. Moreover, the mass mold 51 is composed of plastic members,
It functions as a direct abutting member for the armature 82.

The plate spring 6 to which the presser plate 2, damper rubber 3, presser rubber 4, mass 5, and mass mold 51 are attached is attached to the protrusions 107, 106 of the plate 1.
and arranged as shown in FIG. These parts are basically armature 82
It has the function of absorbing the return energy of the armature 82 and adjusting the stroke of the armature 82. That is, when the armature 82 returns, the mass mold 51
The fin portion 62 of the leaf spring 6 is bent to the right (FIG. 7). The kinetic energy transmitted to the mass 5 is mostly absorbed by the damper 3, and finally acts on the presser plate 2 and is absorbed.
On the other hand, in order to adjust the stroke of the armature 82, that is, the return position, the screw 104 is moved and adjusted. As a result, the presser plate 2 and the damper rubber 3 are moved, and the fin portion 62 of the leaf spring 6 is elastically deformed, so that the mass mold 51 approaches or moves away from the armature 82, and its return position is set.

Next, the magnet structure will be explained with reference to FIG. The magnet structure 8 is a wire 80
functions as a driving means.

The wire 80 is fixed to the tip of the armature 82 by a known joining method such as spot welding. The armature 82 is made of an aluminum member with a hollow interior, and a magnetic member is attached to the base of the aluminum member, and this magnetic member is attracted to a core 85, which will be described later. Core 85 is L
It is constructed by stacking a plurality of shaped magnetic thin plates (core plates). This core 85 has a coil 8
4 is press-fitted. A terminal pin 87 is attached to the lower end of the coil 84, and electrical continuity with the coil 84 is achieved via this terminal pin 87. When press-fitting the coil 84, a return spring 86 is inserted between the core 85 and the coil 84. The return spring 86 is, for example, a plate spring made of stainless steel, and acts on the armature 82 in a direction opposite to the direction in which the magnetic portion of the armature 82 is attracted to the core 85.

A pair of yoke plates 81 are arranged on both sides of the stacked core plate 85 and are integrally caulked and fixed to the core plate 85 by caulking portions 832 and 834. The base of the armature 82 is rotatably supported around a shaft 831. Here, the yoke plates 81 are approximately U-shaped, and one of the yoke plates 81 has a protrusion 835 on the lower side and a protrusion 836 on the front side.
is provided. These protrusions 835, 836 are useful for positioning the magnetic arrangement 8 on the housing plate 7. Further, the upper ends of the pair of yoke plates 81 sandwiching the core plate 85 are meaningfully engaged and fixed between the protrusions 105 of the plates 1 (FIG. 8).

Now, returning to FIG. 1, the combined structure of the housing plate 7, wire guide assembly 9, etc. will be described.

The housing plate 7 is a substantially circular plate-shaped member made of, for example, an iron plate, and has a relatively large hole formed in the center thereof, through which the head housing 96 passes.
There are six screw holes 713 on the outer periphery of this plate 7.
is provided. The position of this screw hole 713 corresponds to the screw hole 101 of the plate 1 described above, and the screw 103 is engaged.

A notch 721 is formed at a point symmetrical position in the housing plate 7, and the print head assembly is fixed to a carriage (not shown) or the like via this notch 721 with a screw (not shown).

The housing plate 7 also has 24 holes 71.
1 and 712 are formed concentrically with a predetermined radius maintained. A protrusion 835 of the yoke plate 81 of the magnet assembly 8 is inserted into the hole 711 formed on the outer periphery.
is inserted (Figure 8). Further, the terminal pin 87 of the coil 84 is passed through the hole 712 formed in the inner peripheral portion. Such a plate 7 and various holes are manufactured all at once using a known press working technique.

A plastic wire guide assembly 9 is formed in the center of the housing plate 7. Here, the upper part with the housing plate 7 as a boundary is the head housing 96, and the lower part is the wire guide part 9.
I'll say 7. This wire guide assembly 9
is manufactured by, for example, a known molding technique, inserted into the center of the housing plate 7, and fixed with adhesive. Alternatively, the housing plate 7 may be placed in a predetermined position during molding, and the housing plate 7 may be fixed at the same time as the wire guide assembly 9 is molded.

The wire guide assembly 9 integrally formed with the housing plate 7 has a structure unique to this embodiment. That is, the head housing 96
24 grooves 962 are formed on the outer periphery of. The protrusion 836 of the yoke plate 81 of the magnet component 8 is engaged with this groove 962. In other words,
These grooves 962 and the holes 7 on the housing plate 7
11 on the same plane (plate 81) and at a corresponding position. Twenty-four notches 961 are formed in the inner circumference of the head housing 96, and the tip of the armature 82 is slidably disposed in each of the notches 961.

Each wire 80 of the magnet arrangement 8 positioned on the housing plate 7 is guided within a wire guide 97.

This wire guide section 97 includes a guide plate 92,
Grooves 901 and 902 are provided for supporting 93. The guide plates 92 and 93 are as shown in FIG.
Recesses 921 and 931 corresponding to the number of wires 80
is formed. These guide plates 92, 93 and a wire guide 94, which will be described later, have a configuration characteristic of this embodiment. At the tip of the wire guide section 97,
Bearing 91 with wire through holes 913 and 914
1. The tip guide 912 is engaged and fixed at the position shown in FIG.

Next, the wire guide 94, which is characteristic of this embodiment, will be explained with reference to FIGS. 4 and 5.

This wire guide 94 is inserted into the inner hollow part of the wire guide assembly 9. wire guide 94
is a plastic molded product, and is easily molded by dividing the left and right molds at symmetrical positions with the boundary line AA in FIG.

The molded wire guide 94 is formed with a groove 941 for guiding the line-symmetrical position wire 80. The number of these grooves 941 is 12 on each left and right side, and the grooves 941 have a substantially straight line shape up to an intermediate point (for example, point P in FIG. 7). Therefore, as can be seen from the sectional view of FIG. 5, the wire guide 94 has a conical shape with an elliptical cross section up to point P, and is substantially flat from point P to the end.

When incorporating this wire guide 94 into the wire guide section 97, it is assumed that the guide plates 92, 93 are fixed in the grooves 901, 902 of the wire guide section 97 in advance. In this state, the wire guide 94 is inserted into the hollow portion of the wire guide assembly 9 from the right side in FIG. Thus, the wire guide 94 passes through the hollow portions of the guide plates 92 and 93 and is fixed at a predetermined position.

In this state, the wire 80 of the magnet component 8 is inserted through the groove 941. in this case,
Since the wire guide 94 has a substantially conical shape,
The wire 80 is given a predetermined curvature, and the groove 941
It is inserted smoothly. The tip of the wire 80 is guided to a bearing 911 and through holes 913 and 914 of a tip guide 912.

When inserting the wire 80 and the magnet structure 8
When the wire 80 is moved and the wire 80 is slid, a predetermined curvature is given to the wire 80 toward the center of the wire guide 94, so that the wire 80 moves while contacting the groove 941 of the wire guide 94. do. Therefore, it is preferable that recesses 921 and 931 are provided in the inner hollow portions of the guide plates 92 and 93, but due to the curvature of the wire 80, the wire 80 is disposed in the recesses 921 and 931 of the guide plates 92 and 93. ,93
1, so the recesses 921, 9
31 does not necessarily have to be provided.

A printed circuit board 73 is arranged on the back side of the housing plate 7 described above (on the left side of the plate 7 in FIG. 7). A through hole 731 into which the terminal pin 87 of the coil 84 is inserted and fixed by soldering is formed in the printed circuit board 73 in a circular shape.
The through holes 731 are provided in the same number as the terminal pins 84, and the through holes 731 formed on the inside of the circle function for grounding, and the through holes 731 formed on the outside function for power supply. These through holes 731 are electrically connected to plug portions 733 via patterns 732.

Next, a method of assembling the print head according to this embodiment will be explained. When assembling the print head in the following description, it is assumed that its constituent parts are manufactured in the shapes shown in FIGS. 1 to 6. This is manufactured by known press working and plastic working techniques, as described above.
The magnet structure 8 also includes a pressed yoke plate 81, a core plate 85, etc., as shown in FIG. Further, as shown in FIG. 1, the housing plate 7 and the wire guide assembly 9 are integrally constructed. In addition, a printed circuit board 73 is attached to the back side of the plate 7.

When assembling the print head, first insert the guide plate 9 into the grooves 901 and 902 of the wire guide section 97.
2,93 is inserted and fixed. Of course, a bearing 911 and a tip guide 912 are fixed to the tip of the wire guide section 97 by adhesive or the like.

A wire guide 94 shown in FIG. 4 is inserted through the head housing 96 and wire guide portion 97 of the wire guide assembly 9 in this state. When the wire guide 94 is inserted to a predetermined position, it is adhesively fixed to the inner wall surface of the head housing 96 through a location other than the groove 941.

At this point, the magnet structure 8 shown in FIG. 3 is attached. First, the wire 80 is inserted into the wire guide assembly 9. When inserting the wire 80, since the wire guide 94 has an elliptical conical shape, the wire 80 is inserted into the curved groove 941.
is inserted while being guided by the bearing 91.
1. Guided by the tip guide 912. At the same time, the protrusion 835 of the magnet structure 8 is engaged with the hole 711 of the housing plate 7, and the terminal pin 87 is similarly inserted into the through hole 731 of the printed circuit board 73. At the same time, the protrusion 836 is engaged with the groove 961 of the head housing 96.
In this way, the guiding and placement of the wire 80 of one magnet arrangement 8 on the housing plate 7 takes place. Of course, at this time armature 8
2 is in a state where it can slide within the groove 961.

Thereafter, in the same manner, a plurality of magnet structures 8, for example 24, are regularly arranged concentrically on the housing plate 7, and the wires 8 are arranged concentrically on the housing plate 7.
0 is guided through the groove 941 of the wire guide 94.

When the 24 magnet structures 8 are arranged on the housing plate 7, the leaf spring 6 is placed thereon. A mass 5 and a mass mold 51 are already fixed to this leaf spring 6, and this mass mold 5
The leaf spring 6 is arranged such that the leaf spring 1 is located above the armature 82.

Furthermore, a presser rubber 4, a damper rubber 3, and a presser plate 2 are stacked on top of the leaf spring 6. Then, plate 1 is placed over it. When positioning the plate 1, the yoke plates 81 of the magnet structures 8 and the plate 1 are aligned so that the yoke plates 81 of all the magnet structures 8 are engaged between the protrusions 105.
Thereafter, the plate 1 is fixed to the housing plate 7 by passing the screws 103 through the screw holes 101 and 713. Thus, the magnet structures 8 arranged on the housing plate 7 are pressed against the plate 1 and fixed regularly.

Finally, the terminal pins 87 inserted into the through holes 731 of the printed circuit board 73 are soldered to the thus assembled semi-finished print head. Further, in order to adjust the stroke amount of the armature 82, the screw 104 is adjusted.

As described above, the printing head according to this embodiment is assembled. Generally, this type of print head can be applied to many impact type serial printers. In that case, the print head is attached via cutout 721 to a known carriage. Further, the plug portion 733 of the printed circuit board 73 is inserted into the connector to establish electrical continuity.

In a print head constructed in this way, the stroke of the wire or armature is controlled by the screw 104.
By adjusting , each can be set individually.

Additionally, in the event of wire breakage or magnet failure including coils that occur during printing operations of the print head, simply remove the plate 1 and replace the defective magnet component with a new one. Can be easily dealt with. This is because in conventional print heads, the magnets are firmly fixed on the housing plate with screws, etc., and it takes a lot of time to install and replace them, but in the print head according to this embodiment, This is because the work is basically done by simply removing the plate 1.

In addition, the return energy of armature 82 is
Most of it is absorbed by the damper rubber 3, and furthermore, it is completely stopped by the holding plate 2 and the screw 104. In this case, in the conventional print head, the plate 1 was fixed with a single screw through its center, so the return energy was concentrated on that screw, which caused a problem in terms of strength. According to the print head of the embodiment, the circumferential portion of the plate 1 is fixed to the housing plate 7 with a plurality of screws 103, for example, six, so that the return energy is dispersed and the structure is sufficiently satisfactory in terms of strength. be.

Further, when inserting the wire into the wire guide assembly, it is only necessary to insert the wire along the groove 941 of the wire guide 94, and the wire can be inserted and guided very easily.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be implemented with various modifications. The terms numerical values, upper and lower, left and right used in the description of the above embodiments are used as examples for convenience of explanation, and the present invention is not limited thereto.

For example, although in the above embodiment the print head is described as having 24 wires, or in other words, 24 magnetic structures, other variations may include the print head having 16 or 12 wires. In such cases, the various engaging portions such as grooves and holes in the above embodiments may be used as appropriate depending on the number thereof.

Further, the shapes of these grooves, holes, protrusions, etc. are not limited to the above embodiments.

[Brief explanation of drawings]

1 is an exploded perspective view of a wire matrix print head according to an embodiment of the present invention, FIG. 2 is a perspective view showing the back side of the plate 1 shown in FIG. 1, and FIG. 3 is a magnet configuration. A perspective view showing the body;
Figure 4 is a perspective view showing the wire guide and guide plate, and Figure 5 is AA, BB, CC of Figure 4.
A sectional view, FIG. 6 is a perspective view showing the printed circuit board,
FIG. 7 is a side sectional view of the wire matrix print head, and FIG. 8 is a sectional view taken along line DD in FIG. 1...Plate, 7...Housing plate,
8...Magnetic construct.

Claims (1)

[Scope of Claims] 1. A first plate provided with a plurality of engaging portions substantially concentrically, and a plurality of magnet structures positioned at the engaging portions of the first plate and arranged independently, Each structure includes a core made up of a plurality of stacked plate-like magnetic members, a yoke plate that sandwiches and fixes the core from both sides, a coil inserted into the core, and a wire at the tip. a magnet structure having a fixed armature which is attracted to the core by conductive action on the coil; a shaft rotatably supporting the armature on the yoke plate; and a plurality of arranged magnet structures. a second plate which is fixed between the first plate and the first plate; 2. Claim 1, characterized in that the yoke plate has a protrusion on the lower side, and the protrusion is engaged with a hole provided in the first plate to position the magnet structure. wire matrix print head. 3. A wire matrix print head according to claim 1, wherein the second plate is detachably attached to the first plate with screws. 4. The wire matrix print head according to claim 1, wherein the second plate is provided with an adjustment screw for adjusting the stroke of the armature. 5 A plurality of engaging portions are provided on the back side of the second plate in correspondence with the arrangement positions of the magnetic components, and predetermined portions of the magnetic components are locked to the engaging portions. Claim 1
Wire matrix print head as described in Section 1. 6. A first plate provided with a plurality of engaging portions substantially concentrically, and a plurality of magnet components positioned at the engaging portions of the first plate and arranged independently, each of which has a plurality of magnetic components. The core consists of a plurality of stacked plate-like magnetic members, a yoke plate that clamps and fixes the core from both sides, a coil that is inserted into the core, and a wire that is fixed to the tip and connected to the coil. a magnet structure having an armature that is attracted to the core by the conductive action of the magnet structure, a shaft that rotatably supports the armature on the yoke plate, and a plurality of the arranged magnet structures that are commonly held down. a second plate fixed between the second plate and the first plate; a step of positioning a shock absorbing member on top of the magnetic structure; and a second step of pressing down all the magnetic structures in common through the shock absorbing member while aligning with a predetermined portion of the magnetic structure. A method of assembling a wire matrix print head, comprising the step of removably attaching a plate to a first plate. 7 Claim 6, characterized in that a step of adjusting the stroke of the armature is added.
How to assemble the wire matrix print head described in Section 1.