JPH0280255A - Printing head - Google Patents

Abstract

PURPOSE:To efficiently assemble a printing head by mounting a wire guide for guiding a printing wire and providing a nose having a wire passing groove having a width larger than that of the wire guide and a prescribing groove for prescribing the position of the wire guide. CONSTITUTION:Wires 37 are passed through intermediate guides 22 in a state arranged using a jig from the hole 21d provided to the inside of the stopper 21a of a nose 21. Next, the intermediate guides 22 are moved and the engaging pieces 22a, 22b of the intermediate guides 22 respectively engaged with the grooves 21b, 21 of the nose 21 to fix the intermediate guides to the nose 21. At this time, the wires 37 are prevented from protruding from the foremost intermediate guide 22 and allowed to protrude therethrough after the intermediate guides are fixed to the nose 21. Next, the nose 21 is fixed to a clamper 20 by a screw 24 and a leading guide 38 is subsequently bonded and fixed to the leading end of the nose 21 while the wires 37 are passed through said guide 38.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a print head used in a printing device or the like.

2. Description of the Related Art Print heads conventionally used in printers and the like can be roughly divided into clapper-type and spring-charged types. In recent years, spring-charged printers have come into widespread use as printing speeds have increased.

A conventional print head will be explained below.

FIG. 4 is a half-sectional view of a conventional spring-charged print head, in which 1 is a base yoke, 2 is a coil, 3 is a magnet, and 4 is an auxiliary yoke.
, the magnet 3 and the auxiliary yoke 4 are bonded together. 5 is a leaf spring attached to the auxiliary yoke 4 in which a hole 5a is formed, 6 is an armature laser welded to the leaf spring 5, and 7 is passed through the hole 5a of the leaf spring 5, and one end of the armature 6 (hereinafter referred to as , the other end is abbreviated as the tip, and the other end is abbreviated as the rear end.) The wire 8 attached to the wire 7 is a tip guide that guides the tip of the wire 7, 9 is an intermediate guide that guides the middle of the wire 7, and 10 is an auxiliary yoke. The plate spring 5 is inserted and fixed together with the armature 6.
It is configured to surround an armature 6, a plate spring 5,
Base yoke 11 A side yoke that forms a magnetic path together with the magnet 3 and the auxiliary yoke 4. 11 supports the tip guide 8 and is a stopper for the armature 6.
This nose has a groove 11b into which the intermediate guide 9 is inserted. As shown in more detail in FIG. 5, the grooves 11b are configured to hold the sides of the intermediate guide 9. The stopper 11a prevents the plate from flying 5 by restricting the movement of the wire 7 and the armature 6 when the print head is driven without a print medium (hereinafter referred to as "dry printing").
This is provided to prevent the plate blade 5 from being used in both directions and to prevent the plate blade 5 from breaking.

The print head is provided with a plurality of print wires 7, each held by an armature 6, and the wires 7 are centrally aligned by an intermediate guide 9.

The operation of the conventional print head configured as described above will be described below.

First, when the coil 2 is not energized, the magnetic flux of the magnet 3 flows through the base yoke 1, armature 6, and side yoke 1.
0, passes through the auxiliary yoke 4, and at this time, a magnetic attraction force is generated between the base yoke l and the armature 6, so the plate spring 5 is deformed and the armature 6 is in contact with the base yoke 1.

Next, when the coil 2 is energized, the magnetic flux of the coil 2 is applied to the magnet 3 in the gap between the armature 6 and the base yoke l.
In order to cancel the magnetic flux, the plate spring 5 separates from the base yoke 1 due to the elastic force of the plate spring 5. At this time, the board flops5.
! :The wire 7 moves together, the wire 7 moves toward the print medium, and prints by coming into contact with the print medium.

The assembly of the conventional print head configured as described above will be described below.

First, the armature 6 is fixed to the leaf spring 5, and the leaf spring 5 is fixed to the nose 11 via the side yoke 10. Next, insert the intermediate guide 9 into the nose 11 111b, pass the wire 7 through the holes 5, z, and the tip guide 8 of the plate 5, and weld the wire 7, plate 5, and armature 6 together. do. This operation is performed over all wires 7. However, in the conventional configuration described above, it is necessary to pass the wire 7 through the leaf spring 5, the intermediate guide 9, and the tip guide 10 one by one, which takes time to assemble. The wire passing groove is wider than the width of the wire guide and the nose is provided with a regulating groove for regulating the position of the wire guide.

Operation With the above configuration, after passing the wire guide through a plurality of wires during assembly, the wire guide can be fixed to the nose by moving the wire guide within the wire passage groove and inserting it into the regulation groove.

Embodiment FIG. 1 is a half-sectional view of a print head in an embodiment of the present invention, in which 31 is a base yoke, 32 is a coil, 33 is a magnet, 34 is an auxiliary yoke, 35 is a leaf spring, 36 is an armature, and 37 is the wire, 38 is the tip guide, 4
0 is the side yoke. 20 is a clamper that holds the leaf spring 35 between it and the side yoke 40, and 21 is a nose that supports the tip guide 38 and has a stopper 21a1 of the armature 36 and a groove 21b.

The stopper 21a is provided to restrict the movement of the wire 7 and armature 6 during blank firing, as in the conventional example. 21d has a height indicated by the arrow, and wire 3
7, an intermediate guide 1.23 is provided with engaging pieces 22a and 22b as shown in more detail in FIG.
24 is a screw for fixing the plate spring 35 to the clamper 20.

FIG. 2 is an exploded sectional view of a main part of the print head of this embodiment, and 21c is a groove in which the engagement piece 22b of the intermediate guide 22 engages, and the engagement piece 22a of the intermediate guide 22 engages in the groove 21b. match.

FIG. 3 is a front view of essential parts of the print head of this embodiment, and the opening 21d is provided in front of the nose 21 and has an inner diameter larger than the outer diameter of the intermediate guide 22. FIG.

The assembly of the print head of this embodiment configured as described above will be described below.

First, the armature 36, wire 37, and plate spring 35 are joined together, and the plate spring 35 is sandwiched between the side yoke 40 and the clamper 20, and fixed with screws 23. Next, the wires 37 are aligned using a jig (not shown in the figure), and the intermediate guide 22 is passed through the wires 37, and in this state, the holes 21d provided inside the stopper 21a of the nose 21 The intermediate guide 22 is passed through as shown by arrow B. Next, move the intermediate guide 22 as shown by arrow C in FIG.
2b are engaged with the grooves 21b and 21c, respectively, and the intermediate guide is fixed to the nose 21.

At this time, the wire 37 is prevented from protruding from the foremost intermediate guide 22, and the wire is made to protrude after the intermediate guide 22 is fixed to the nose 21. Next, the nose 21 is fixed to the clamper 20 with screws 24. Next, the tip guide 8 is adhesively fixed to the tip of the nose 21 while being passed through the wire 7. A coil 2, a magnet 3, and an auxiliary yoke 4 are attached to a base yoke 1, and a side yoke 10 is further fixed integrally.

In this example, the tip guide 8 was attached later, but
This may be constructed by attaching the tip guide to the wire in advance using the same method as the intermediate guide 22 and then passing it through the nose hole.

Effects of the Invention The present invention is equipped with a wire guide for guiding a printing wire, a nose having a wire passage groove wider than the width of the wire guide and a regulation groove for regulating the position of the wire guide. After passing the wire guide through the wire guide, the wire guide can be fixed to the nose by moving the wire guide within the wire passage groove and inserting it into the regulation groove. There is no need to pass the wires through the wire guide one by one (this makes it possible to pass the wires through the wire guide in an aligned state at one time, making it possible to assemble the print head efficiently.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view of a print head according to an embodiment of the present invention, FIG. 2 is an exploded sectional view of the same essential part, FIG. 3 is a front view of the same essential part, and FIG. 4 is a half-sectional view of a conventional print head. FIG. 5 is an exploded sectional view of the same essential parts. 20... Clamper, 21... Nose, 21a...
Stopper, 21b, 21c...groove, 21d...hole, 22...intermediate guide, 22a, 22b...engaging piece, 23...screw, 31...base yoke, 32...
・Coil, 33... Magnet, 34... Auxiliary yoke, 35... Leaf spring, 36... Armature, 37
...Wire, 38...Tip guide, 40...Side yoke. Name of agent: Patent attorney Shigetaka Awano and 1 other person 2/-・-
North 21b, 2fc, -ri 4 22- Intermediate force id Fig. 4 3゛-°Magnet 4- Oke period Yog 5- Sales I @ 6 5 mountain - 6 2- Boomatinia 10- Stoitkog II - North II di -Stock collar 6- ttb °-s distance 345fQ Fig. 5 9- Cloth guide lf・-2-sffEY-one groove l

Claims (1)

[Claims] A wire for printing, an armature that holds the wire at one end, a yoke that forms a magnetic path together with the armature, a return spring for the armature, and a wire guide that guides the wire. A print head comprising a nose having a wider wire passage groove and a regulation groove for regulating the position of the wire guide.