JPH10272791A - Wire dot printer head, method of fixing armature and wire in wire dot printer head, and auxiliary member used for fixing armature and wire of wire dot printer head - Google Patents

Abstract

(57) Abstract: An object of the present invention is to securely fix a wire and an armature in a wire dot printer head for fixing a wire to an armature via an auxiliary member. SOLUTION: An auxiliary member 130 having a communication passage 132 for communicating the insertion hole 131 with the outer peripheral surface of the peripheral wall 130a is provided at a distal end portion of a free end of an armature 110 so as to communicate with the peripheral wall 130a of the insertion hole 131. Communication hole 13
1 is connected to the wire 120, and the wire 12 is
0 is integrally fixed to the armature 110 together with the auxiliary member 130 when the insertion hole 13 is inserted through the communication passage 132.
1 and the wire 120 and the auxiliary member 13
A wire dot printer head which securely fixes the armature 110 to the armature 110.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire dot printer head and a method for fixing an armature to a wire.

[0002]

2. Description of the Related Art In a conventional wire dot printer head (hereinafter, referred to as a printer head), a plurality of cores wound with coils are arranged in a ring shape in a main body of the printer head, and one end side of an armature, that is, a free end side. The other end, that is, the base side of the armature fixed by welding the rear end of the printing wire (hereinafter referred to as a wire) with silver or the like is opposed to the end face of each core, and the armature is provided near the core. There is a configuration in which a fulcrum is operably supported about a rotation center, and a wire is projected toward a platen from a tip end of a wire guide provided on a main body of the printer head by an armature operated by energizing the coil.

FIG. 12 shows an example of the fixing between the armature and the wire in the conventional printer head.

That is, as shown in FIG.
The armature 210 is composed of an arm 212 having a free end 211 at the tip and a base 213 having a pin hole 214 at the rear end of the arm 212. Is fixed by welding the rear end directly with a silver solder or the like. By energizing the coil (not shown), the armature is turned or moved about a fulcrum (not shown) provided in the vicinity of the core, and the fixed wire 220 is directed toward a platen (not shown). Printing is performed by protruding.

[0005] The plurality of armatures 210 to which the wires 220 are fixed as described above are provided inside the main body.
Are arranged radially with the free end 211 to which the wire 220 is fixed inward, while the tip of the wire 220 is a guide tip (not shown).
Are inserted through guide holes arranged in a straight line. As described above, the rear end of the wire 220 is arranged in a ring shape, and the front end is linearly arranged in the center of the annular region surrounded by the rear end portion arranged in a ring shape by the guide tip (not shown). The wire 220 is curved, and a bending stress acts on the wire 220. The bending stress acts most strongly in the directions A and B as shown in FIG. Further, the plurality of armatures 210 are connected to the free end side 211.
Is arranged radially like a petal with the center as the center part, and depending on the arrangement position, the longitudinal direction of the armature 210 and the bending direction of the wire 220 do not always match, that is, do not necessarily curve along the longitudinal direction of the armature 210. Curving occurs in a direction that intersects the direction. In this case, bending stress in the C and D directions also acts on the wire 220.

Moreover, in the example shown in FIG. 12, since only the rear end of the wire 220 is fixed to one surface of the front end of the free end 211 of the armature 210, it is weak against bending stress in the A, C, and D directions, and is fixed. There is a problem that the portion is easily peeled off, and in order to solve this problem, there is a device that employs a fixation as shown in FIG.

The fixing shown in FIG.
The wire 220 is inserted into the through hole 216 of the metal tube 230 at the free end 211 of the metal tube 230 so that the upper end of the metal tube is brought into contact with the lower end of the end surface of the armature 210 and the penetrating portion of the wire 220 is brought into contact with the end surface of the free end 211. This is an example in which both contact portions are welded. The configuration of each part other than the configuration related to the fixing of the armature 210 is the same as that shown in FIG. 12, and the operation of the armature 210 is also the same as the operation described in FIG.

[0008]

However, in the example shown in FIG. 13, since the entire circumference of the wire 220 is supported inside the through hole 216, the stress in the A, B, C, and D directions can be reduced. Is strong, for example, a through hole 2 having a diameter of 0.25 mm
Since the gap between the two is very narrow so that the wire 220 having a diameter of 0.2 mm is inserted into the through hole 16, after the wire 220 is inserted through the through hole 216, a fixing agent such as silver low is injected into the through hole 216. Therefore, there is a problem that the fixing work is difficult, and the through hole 216 and the wire 22
There is a problem that the bonding strength between both the wire 220 and the metal tube 230 is weakened because the bonding agent cannot sufficiently flow into the gap with the outer periphery of the metal tube 230.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the invention according to claim 1 comprises a plurality of cores, each of which has a plurality of cores arranged in an annular shape in a main body and having a coil wound thereon. An armature whose base is arranged corresponding to a core and whose free end moves about a fulcrum provided near the core as a center of rotation by energizing the coil, and an insertion hole having an insertion hole and communicating with the insertion hole And an auxiliary member having a communication path separate from the armature, wherein one end of the wire is partially penetrated through the insertion hole, and at least the penetrating portion of the wire and the auxiliary member are connected to the free end of the armature. It is integrally fixed to the part.

According to the first aspect of the present invention, since the insertion hole of the auxiliary member and the communication passage different from the insertion hole communicating with the insertion hole are provided, the fixing agent is inserted into the insertion hole via the communication passage. Flows into the gap between the inner peripheral surface of the insertion hole and the outer peripheral surface of the wire, so that the wire is securely fixed to the auxiliary member. It has the effect of obtaining sufficient strength.

According to a second aspect of the present invention, the auxiliary member according to the first aspect of the present invention is such that the communication path is formed by a linear slit parallel to the center axis of the insertion hole of the auxiliary member.

According to the second aspect of the present invention, in addition to the function of the first aspect of the present invention, since the communication path is formed as a linear slit, the inner peripheral surface of the through hole and the wire are formed over the entire length of the auxiliary member. Since the fixing agent can reliably flow into the outer peripheral surface, the auxiliary member and the wire can be securely fixed to each other.

According to a third aspect of the present invention, there is provided a spiral structure in which the auxiliary member according to the first aspect of the present invention is formed in a cylindrical shape and the communication path makes N (N is an integer of 1 or more) circumference along the peripheral surface of the peripheral wall. It is formed by a slit.

According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, since the communication passage is formed as a helical slit, the communication area formed on the outer peripheral surface of the wire can be enlarged. The inflow of the fixing agent between the inner peripheral surface of the through hole of the auxiliary member and the outer peripheral surface of the wire can be ensured, and the communication passage is formed in a spiral shape having a positive integer number of turns, so that the fixing agent can fix the wire. Has the effect that uniform reinforcement can be performed against bending stress from any direction on the peripheral surface of the wire.

According to a fourth aspect of the present invention, there is provided the method of fixing the armature and the wire in the wire dot printer head according to the first aspect of the present invention, wherein a part of the wire is loosely fitted into the insertion hole by the positioning means. A step of positioning the auxiliary member by penetrating the armature; a step of causing a part of the penetrated wire and the auxiliary member to face a distal end of the armature at a free end side; Simultaneously fixing the armature and the auxiliary member to the distal end of the armature on the free end side, thereby fixing the armature and the wire.

According to the fourth aspect of the present invention, the armature, the wire and the auxiliary member can be simultaneously fixed, so that the fixing operation can be efficiently performed.

According to a fifth aspect of the present invention, there is provided a method of fixing the armature and the wire in the wire dot printer head according to the first aspect, wherein a part of the wire is loosely inserted into the insertion hole by the positioning means. Positioning the auxiliary member to fix the auxiliary member to the wire, causing a part of the penetrated wire and the auxiliary member to face the free end side tip of the armature, and A step of simultaneously fixing a part of the wire penetrated in the fitted state and the auxiliary member to a free end side tip of the armature, thereby fixing the armature and the wire.

According to the fifth aspect of the present invention, since the wire and the auxiliary member are fixed to each other and the integrated wire is fixed to the armature, it is possible to further securely fix the wire and the auxiliary member.

According to a sixth aspect of the present invention, there is provided the method of fixing an armature and a wire according to the fourth or fifth aspect, wherein the positioning means is a wire support base having at least a positioning surface formed of a non-magnetic member. Things.

According to the sixth aspect of the present invention, in addition to the function of the fourth or fifth aspect, the portion on which the auxiliary member of the wire support is placed is made of a non-magnetic member. The energy generated from the electromagnetic generating means is not absorbed by the wire support table, and has an effect of facilitating the fixing work efficiently.

According to a seventh aspect of the present invention, there is provided an arc having an insertion hole through which a part of one end of the wire is inserted in a loosely fitted state, and a communication path different from the insertion hole communicating with the insertion hole.
It is an auxiliary member for fixing the mature and the wire.

According to the seventh aspect of the present invention, since the insertion hole of the auxiliary member and the communication passage different from the insertion hole communicating with the insertion hole are provided, a part of one end of the wire is inserted into the insertion hole. When the fixing agent is penetrated and fixed by the fixing agent, the fixing agent easily flows into the insertion hole through the communication passage.

[0023]

Next, an embodiment of the present invention will be described with reference to FIGS. First, the overall structure of the printer head PH will be described with reference to FIGS. FIG. 8 is a longitudinal sectional side view, and FIG. 9 is an exploded perspective view showing a mounting relationship of main parts.

As shown in FIGS. 8 and 9, the printer head PH includes a mounting member 1, an armature block AB, and a yoke block YB. The mounting member 1, the armature block AB, and the yoke block YB are screwed together. 2 are integrally assembled.

The armature block AB includes a front cover 3, an armature guide 4, a stopper receiver 5, a film 6 (not shown in FIG. 9), an armature stopper 7, an armature spring 8 (not shown in FIG. 9), and a fulcrum holding spring 9. (Not shown in FIG. 9) and wire 1
The armature 110 has an armature 110 to which it is fixed, and is integrally assembled with the screw 10 to form a block as shown in FIG. The yoke block YB includes a yoke 21, a spacer 22, a substrate 23, and a housing 24, and is blocked by screws 26.

Next, each component of the armature block AB will be described in detail.

The mounting member 1 has a wire guide 1 at the center.
1 is provided with a rectangular fitting hole 1a for fitting the
On both sides of the fitting hole 1a, two screw holes 1 fixed by screws to a carrier of a printer body (not shown).
a screw 2 that is provided with two projections 1c provided with
Are provided with three screw holes 1d.

The front cover 3 is formed in a container shape with one end opening having a circular bottom surface 3a facing the mounting member 1.
A rectangular fitting hole 3b for fitting the wire guide 11 at the center of the bottom surface 3a and three screw holes 3c for attaching screws 2 to be integrated with other components constituting the printer head PH (FIG. 9) (Only two are shown). Also, an armature block A is provided on the bottom surface 3a of the front cover 3.
B are provided with three screw holes 3d (only two are shown in FIG. 9) for inserting the screws 10 to be integrated with other parts constituting the armature guide B, and positioning holes 3e. . . Is provided.

The armature guide 4 has a fitting hole 1a formed in the mounting member 1 and a bottom surface 3a of the front cover 3.
And three stopper receiving grooves 4a (only two are shown in FIG. 9) for fitting the stopper receivers 5 are formed integrally with the wire guides 11 protruding from the fitting holes 3b provided in the holes. And positioning holes 3e. Provided in the bottom surface 3a of the front cover 3. . . 4b. . . And is in contact with the bottom surface 3 a of the front cover 3. This armature guide 4 is further provided on the side opposite to the surface abutting against the bottom surface 3a of the front cover 3, that is, in FIG.
In the figure, a plurality of guide pins 4c are annularly arranged on a side (not shown), and a plurality of armature springs 8 and fulcrum holding springs 9 are connected to the guide pins 4c.
Grooves 4d and 4 annularly arranged inside and outside of
e is provided. A plurality of guide tips 12. . . Holds a wire 120 fixed to the free end 111 of the armature 110 slidably in the axial direction of the wire.

The stopper receiver 5 is provided with a screw hole 5a for mounting a screw 2 to be integrated with other parts constituting the printer head PH, and is integrated with other parts constituting the armature block AB. A screw hole 5b for inserting the screw 10 is provided.
The stopper receiver 5 is disposed in a stopper receiving groove 4a provided in the armature guide 4, and is provided so as to be sandwiched between the cover 3 and the armature stopper 7.

The film 6 serves to keep the armature 110 from contacting the yoke 21 and is made of a non-magnetic material.

The armature stopper 7 has an annular portion 7a made of aluminum and having a through hole formed in the center, and a disk portion 7b made of rubber attached to the through hole.
It is formed by. The annular portion 7a is provided with three screw holes 7c for attaching screws 10 to be integrated with other components constituting the armature block AB.

Next, a method of assembling the armature block AB will be described.

First, each stopper 5 is fitted into each stopper receiving groove 4a of the armature guide 4. Next, the wire guide 11 is fitted into the fitting hole 3b of the front cover 3, and the positioning holes 3e. . . Pin 4b of the armature guide 4. . . And the front cover 3 and the armature guide 4 are integrated. Then, the guide pin 4c is inserted into the pin hole 113 of the armature 110 while the wire 120 fixed to the free end 111 of the armature 110 is inserted through the guide chip 12, and the plurality of armatures 110 are radially arranged with the free end 111 side inside. To be placed. The bottom surface 3a of the front cover 3, the stopper receiver 5, the film 6, and the armature stopper 7 are sequentially laminated, and a screw 1 is inserted from the armature stopper 7 side.
0 is inserted through the screw holes 7c, 5b, 3d, and the tip of the screw 10 is fixed with the nut 10a to form a block.

Next, the free end 111 of the armature 110
The arrangement of the wire 120 fixed to the inside of the main body of the printer head will be described with reference to FIG. This is an example of 24 pins, in which white circles 120-1a to 120-24a indicate the arrangement of the rear end of the wire 120 fixed to the free end of the armature, and black circles 120-1b to 120-24b indicate the wire guides. 11 shows an arrangement state of a tip end of a wire arranged in a guide hole provided at a tip end of the wire. Dotted line 120-1c
１２０120-24c indicate the curved path of the wire. The armature is arranged outside the white circles 120-1a to 120-24a arranged as described above.

Next, each component of the yoke block YB will be described in detail.

The yoke 21 has three screw holes 21a (only two are shown in FIG. 9).
1b (only two are shown in FIG. 9) and each yoke mounting member 2
1b, a total of 24 cores 21c. . . Are arranged in an annular shape, and the cores 21c. . . A cylindrical portion 21e having a stepped portion 21d on the side provided inside
It comprises a cylindrical portion 21f forming the bottom wall of 1c.

The housing 24 is made of a metal material having a high thermal conductivity, and electrically connects the coil 25 with the outside in the vicinity of the coil 25 and the circular spacer 22 along the direction in which the coil 25 is arranged. Terminal 23 described later
a. . . , 23b. . . , A bottom wall 24b forming the bottom of the tubular wall 24a, and a bottom wall 24b provided integrally with the outside of the bottom wall 24b to transfer heat generated inside to the outside. And fins 24c for releasing the fins. A heat absorbing portion 24 d is formed on the bottom wall 24 b of the housing 24 so as to protrude therefrom.
A large area is in contact with a contact surface 21g that forms one end surface of the disk portion 21f of the disk portion 21f to absorb heat generated in the yoke 21. The bottom wall 24b has the heat absorbing portion 24d.
Connector openings 24e, through which two connectors 23c, 23d provided on both sides of the
24f and three screw holes 24g (only one is shown in FIG. 8) for attaching screws 26 to be integrated with other components constituting the yoke block YB.

Next, the substrate 23 has a heat absorbing portion 2 at the center.
4d and terminals 23a. 23a provided on both sides of the oblong hole 23e for attaching the ends of the conductor of the coil 25. . . , 23b. . . And a thermistor arrangement hole 23f for disposing a thermistor (not shown) for measuring the temperature inside the main body of the printer head, and a notch 23g for passing a screw 26 for integrating with other components constituting the yoke block YB. Three (only two are shown in FIG. 9) are provided. Also, the terminals 23 of the substrate 23
a. . . , 23b. . . The two connectors 23c and 23d that are connected to an external circuit are provided on the side opposite to the side where is provided (the side not shown in FIG. 9).

Further, the spacer 22 is for electrically insulating the yoke 21 and the substrate 23, and has an oval long hole 22 for inserting the heat absorbing portion 24d in the center.
a, a through hole 22b provided on both sides of the elongated hole 22a, through which a conductor of the coil 25 is inserted, and a through hole 22c, into which a conductor of the coil 25 is inserted and a thermistor (not shown) is arranged. And yoke block Y
Three notches 22d (only two are shown in FIG. 9) through which the screws 26 for integrating with other components constituting B are inserted are provided.

The size and shape of the long hole 23e provided in the substrate 23 and the long hole 22a provided in the spacer 22 are as follows.
It is formed slightly larger than the cross section of the heat absorbing portion 24d.

Next, the assembly of the yoke block YB and the yoke block YB and the armature block A
A method of assembling the printer head PH by combining the printer head B with the printer head PH will be described.

First, assembling the yoke block YB,
The yoke 21, the spacer 22, the substrate 23, and the housing 24 on which the coil 25 is mounted are laminated, and the screw 26 is inserted through the screw hole 24g from the housing 24 side to form the notch 23.
Through the g and 22d, the screw 26 is screwed into the screw hole 21a and integrally joined to assemble the yoke block YB.

Next, with the armature stopper 7 of the armature block AB and the yoke 21 of the yoke block YB facing each other, and with the mounting member 1 and the front cover 3 of the armature block AB corresponding to each other, the screw 2 is attached to the mounting member 1 side. The screw 2 is inserted into the screw holes 1d, 2c, and 5a, and the tip of the screw 2 is screwed into the screw hole 21a of the yoke 21, so that the mounting member 1, the armature block AB, and the yoke block YB are combined and integrated. The printer head PH is assembled. In this state, one of the armatures 110, that is,
c, the fulcrum holding spring 9
, The yoke 21 is rotatably supported on a stepped portion 21d as a fulcrum of the cylindrical portion 21e.

Next, the operation of the printer head PH will be described. When a current is supplied to the coil 25, the base of the armature 110 is attracted to the end face of the core 21c, and the armature 110 is rotated around the stepped portion 21d of the cylindrical portion 21e of the yoke 21 so that the tip of the wire 120 is moved to a platen (not shown). Toward the printer head PH. Thereby, printing is performed by the tip of the wire 120 colliding with the paper on the platen via the ink ribbon (not shown). When the current supply to the coil 25 is stopped, the armature 110 returns by the urging force of the armature spring 8 and returns to the return position predetermined by the armature stopper 7.

Here, the shape of the auxiliary member 130, the positional relationship between the armature 110, the wire 120, and the auxiliary member 130 and the connection state will be described with reference to FIGS. The armature 110 has the widest portion at the base 114 facing the core 21 c, and the arm 112 gradually narrows toward a free end 111 provided at the tip of the armature 110. A wire fixing surface 111 a is formed on the tip end surface of the free end 111 along the axial direction of the wire 120.

Next, the configuration of the auxiliary member 130 will be described. The auxiliary member 130 is made of a metal tube made of a magnetic material such as iron or stainless steel.
And the wire 1 formed by being surrounded by the peripheral wall 130a.
The peripheral wall 130a is provided with a communication passage 132 formed of a linear slit parallel to an axis that communicates the through hole 131 with the outer peripheral surface of the peripheral wall 130a. The cross section in a direction perpendicular to the axis is formed in a C shape. Also,
The communication path 132 is connected to the wire 12 as shown in FIGS.
The auxiliary member 130 is formed from the upper end to the lower end with respect to the 0 axis direction. The relationship between the diameter of the wire 120 and the insertion hole 131 provided in the auxiliary member 130 is as follows.
When the wire 120 is penetrated through the insertion hole 131, the wire 120 is in a state where a slight gap is formed in the wire 120, that is, the wire 120 is loosely fitted.

Then, as shown in FIG.
The rear end portion of the wire 120, that is, the penetrating portion 120a, which penetrates above the insertion hole 131, is fixed to the wire fixing surface 111a with a fixing agent, and the auxiliary member 130
Is fixed to a surface of the armature 110 facing the armature guide 4. At this time, the communication passage 132 extends along the axial direction of the fixed armature 110.

Further, since the communication passage 132 is formed as a linear slit parallel to the central axis of the auxiliary member 130, the auxiliary member 130 can be formed into an annular shape by curling a flat plate. There is also an effect that it can be easily performed as compared with the case where the slit is formed along the axial direction on the tube wall of the metal tube.

Next, the armature 110 and the wire 120
A method of fixing the auxiliary member 130 will be described with reference to FIG.

First, a V-shaped mounting portion 142 having a positioning surface 142a for positioning the auxiliary member 130 and having a V-shaped notch 141 for positioning the wire 120 and made of brass which is a non-magnetic material. Notch 14
1, a side plate portion 144 having a leaf spring 143 for holding the wire 120, a leg having a V-shaped notch 145 for positioning the tip of the wire 120, and supporting the side plate portion 144 in an upright state. The wire support 140 composed of the portion 146 is prepared.

Next, the auxiliary member 130 having the wire 120 penetrated through the insertion hole 131 of the auxiliary member 130 is placed on the mounting portion 142 and positioned.
Are positioned at the vertices of the V-shaped notch 141 of the mounting portion 142 and the vertices of the V-shaped notch 141 of the leg portion 146, and together with the side plate 144 near the center of the wire 120 by the leaf spring 143. Hold and position. In the state where the wire 120 is positioned, the mounting portion 142 is set such that the length of the wire 120a protruding above the auxiliary member 130 is equal to the length of the wire welding surface in the direction perpendicular to the longitudinal direction of the armature 110. The total value of the thickness of the wire support table 140 and the length of the side surface portion 144, that is, the length of the wire support 140, is set to a predetermined length.

Next, a part of the wire 120a penetrating above the upper end of the auxiliary member 130 is
The position of the communication passage 132 is set so that the surface of the armature 110 on the core 21c side and the rear end of the wire 120 are substantially flush with each other.
The armature 110 is positioned so as to face the zero base direction. In this state, using a means for generating electromagnetic waves, such as an electromagnetic coil, to dissolve the silver solder, which is a welding agent previously attached to the wire welding surface 111 a of the armature 110, to penetrate the wire 120 and the auxiliary member 13.
0 and the armature 110 are integrally welded or fixed. At this time, the communication passage 132 provided in the auxiliary member 130 and the insertion hole 131 of the auxiliary member 130
Since the silver solder flows directly between the inner peripheral surface of the wire 120 and the outer peripheral surface of the wire 120, there is an advantage that the silver solder can be securely adhered and welded to the part of the wire 120 inserted through the auxiliary member 130. Have. Furthermore, since the armature 110 is positioned so that the communication path 132 is directed toward the base of the armature 110, and silver solder is attached to the wire welding surface 111a of the armature 110 in advance, the melted silver solder flows downward by its own weight, Communication passage 13
The structure is easy to flow into 2. As shown in FIG. 3, the communication passage 132 extends in parallel with the axial direction of the auxiliary member 130.
As described above, there is an advantage that the auxiliary member 130 having a tubular shape can be easily formed by curling a rectangular or square flat plate as described above.

Further, since the silver brazing is securely welded to the auxiliary member 130, the wire 120, and all the wire welding surfaces 111a formed on the armature 110, there is an effect that the fixing is securely performed. Further, when the mounting portion 142 is made of a magnetic material, the energy generated from the electromagnetic wave generating means is absorbed by the magnetic force from the mounting portion 142, so that the calorific value is reduced. However, the energy generated from the electromagnetic wave generating means can be effectively used for melting the silver solder.

Next, referring to FIG. 5 and FIG.
0 Another embodiment will be described.

FIG. 5 shows that a spiral communication passage 152 is formed around the periphery of the peripheral wall 150a of the auxiliary member 150. As shown in FIG. In the same manner as described in the previous embodiment, this communication passage 152 is penetrated, that is, communicates with the insertion hole 151 through which the wire is inserted and the spiral communication passage 152. The structure of the wire armature and the like are the same as those in the previous embodiment, and a description thereof will be omitted. Also, as described above, the fixing method is the same except that the positional relationship between the communication path and the armature may be any positional relationship, and therefore the description is omitted.

In this configuration, since the orientation of the communication path 152 and the position of the armature may be in any manner, there is an effect that positioning is easier than that of the linear communication path 152.

The auxiliary member 150 shown in FIG.
Of the helical communication path 152 around the peripheral wall 150a.
However, the present invention is not limited to this.
Should be spirally formed over N circumferences (N is an integer of 1 or more). By forming the communication path 152 over N circumferences in this manner, the auxiliary member 150
Has a uniform resistance to the bending stress in the circumferential direction, and has the effect that uniform reinforcement can be achieved over the entire circumferential direction.

Further, the auxiliary member 150 is formed, for example, by winding a linear member having a circular cross section N times spirally with a predetermined gap therebetween, so that the auxiliary member 150 is spirally connected to the peripheral wall in the same manner as the auxiliary member 150 by the gap. An auxiliary member may be formed by forming a passage. In this case, there is an effect that the creation is easier than the creation of the communication passage in the cylindrical auxiliary member.

FIG. 6 shows still another embodiment in which an auxiliary member 160 is constituted by a hollow metal tube, and the hollow surrounded by a peripheral wall 160a of the auxiliary member 160 is formed as an insertion hole 161. The communication path 162 is formed by an elongated communication path penetrating the insertion hole 161 and the outer peripheral surface of the peripheral wall 160a. Further, the structures of the wires 120 and the armature 110 are the same as those of the previous embodiment, and thus the description is omitted. Also, the fixing method is the same except that the shape of the communication path 162 is different as described above, and therefore the description is omitted.

Since the auxiliary member 160 having such a configuration is formed by an elongated circular communication path, there is no notch, so that the communication path is formed as a slit extending from the upper end to the lower end of the peripheral wall 160a of the auxiliary member. This has the effect that the resistance to bending stress is stronger than in the case where it is performed.

In this embodiment, the case where the auxiliary member is made of a metal material has been described. However, when a metal tube is used, there is an effect that a welding agent such as silver solder or solder can be used as a fixing agent. Further, an adhesive may be used as the fixing agent.

In the present embodiment, the armature 1
Tip surface of ten free ends 111 (wire welding surface 111a)
Only the part 120a of the wire protruding from the upper ends of the auxiliary members 130, 150 and 160 is fixed thereto, but the present invention is not limited to this. Is formed at the base side from the wire welding surface by forming a wire welding surface along the axial direction of the wire and a step on the wire welding surface, and is formed substantially parallel to the wire welding surface, that is, along the axial direction of the wire. It may be configured to form the formed auxiliary member welding surface 111b. With such an armature configuration,
A part of the wire projecting from the upper end of the auxiliary member 130 is welded to the wire welding surface 111a, and the auxiliary member welding surface 111b is welded.
A part of the peripheral wall of the auxiliary member 130 having the communication path may be welded. As described above, the length of the wire protruding from the upper end of the auxiliary member 130 is shortened, and the length of the portion extending from the lower end of the auxiliary member can be lengthened, and the bending stress applied to the fixed portion can be reduced.

In this embodiment, the wire support 1
Although only the mounting table 40 is made of a non-magnetic material, the present invention is not limited to this. The entire wire support 140 may be made of a non-magnetic material. Although brass is used as the non-magnetic material, it is not limited to brass, and may be made of copper or ceramics. Further, in the present embodiment, the wire support 140 is composed of the mounting portion 142, the foot plate portion 144, and the leg 146, but is not limited thereto, and the entire wire support 140 is made of a non-magnetic material. You may comprise from a rectangular parallelepiped.

Further, in the present embodiment, the wire 120
The end surface of the wire support 140 is configured to contact the surface supporting the wire support 140, but the present invention is not limited to this, and the length of the wire support 140 is not limited to the auxiliary members 130, 150, and 1.
Any length that is greater than or equal to the length of wire 120 extending below 60 is acceptable.

In this embodiment, the wire support 1
Since the side plates 144 of the forty are welded in the vertical state, there is an effect that the positioning can be easily performed by the weight of the wire. However, the present invention is not limited to this. If the side plates 144 are welded in the horizontal state, the wire can be used without using the leaf spring 143. There is an effect that the positioning of the position 120 can be performed.

In this embodiment, a part of the wire 120 and the auxiliary member 130,
150 and 160 are simultaneously welded to the wire welding surface 111a, but the present invention is not limited to this, and the wire 120 and the auxiliary members 130, 150 and 160 that have penetrated in a loosely fitted state are previously integrated. After preparing a plurality of parts, the parts 12 protruding from the auxiliary member of the wire 120 are prepared.
0a is positioned on the wire welding surface and the armature 11
It may be a method of welding with zero. Further, the wire 120 and the auxiliary members 130, 150,
160 may be welded and subsequently welded to the armature. In this case, since the number of times of positioning the wire on the wire support table is small, the working time is shorter. In any case, since the wire and the auxiliary member are securely welded, there is an effect that the strength against the impact force at the time of printing can be increased.

The concept of the loose fit state in the above embodiment is similar to that of the above embodiment.
A state in which there is a gap between the inner peripheral surfaces of the insertion holes 131, 151, 161 of 0, 160 and the outer peripheral surface of the wire 120 with a gap, and the insertion of the wire penetrated through the insertion holes 131, 151, 161. Since there is formed a gap between the holes 131, 151, and 161 through which the silver solder flows, the wire 120
And a penetrating state in which the auxiliary members 130, 150, 160 can be temporarily fixed.

[0069]

According to the first aspect of the present invention, since the insertion hole of the auxiliary member and the communication passage different from the insertion hole communicating with the insertion hole are provided, the insertion hole is provided through the communication passage. Since the adhesive flows sufficiently between the inner peripheral surface of the insertion hole and the outer peripheral surface of the wire when the adhesive flows, the wire and the auxiliary member are securely fixed. Has an effect that a sufficient fixing strength can be obtained.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the communication passage is formed as a linear slit, the inner peripheral surface of the through hole and the wire are formed over the entire length of the auxiliary member. Since the fixing agent can be reliably caused to flow into the outer peripheral surface, there is an effect that the auxiliary member and the wire can be surely fixed to each other.

According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, since the communication passage is formed as a spiral slit, the communication area formed on the outer peripheral surface of the wire can be enlarged. The inflow of the fixing agent between the inner peripheral surface of the through hole of the auxiliary member and the outer peripheral surface of the wire can be ensured, and the communication passage is formed in a spiral shape having a positive integer number of turns, so that the fixing agent can fix the wire. Has an effect that uniform reinforcement can be performed against bending stress from any direction on the peripheral surface of the wire.

According to the fourth aspect of the present invention, the armature, the wire, and the auxiliary member can be fixed at the same time, and the fixing operation can be performed efficiently.

According to the fifth aspect of the present invention, since the wire and the auxiliary member are fixed to each other and the integrated wire is fixed to the armature, there is an effect that the wire and the auxiliary member can be more securely fixed.

According to the sixth aspect of the invention, in addition to the effect of the fourth or fifth aspect, since the portion on which the auxiliary member of the wire support is mounted is made of a non-magnetic member, The energy generated from the electromagnetic generation means is not absorbed by the wire support, and the fixing operation can be efficiently performed easily.

According to the seventh aspect of the present invention, since the insertion hole of the auxiliary member and the communication passage different from the insertion hole communicating with the insertion hole are provided, a part of one end of the wire is inserted into the insertion hole. When the fixing agent is penetrated through and fixed by the fixing agent, the fixing agent easily flows into the insertion hole through the communication path.

[Brief description of the drawings]

FIG. 1 shows an armature according to an embodiment of the present invention;
It is a perspective view which shows the positional relationship with an auxiliary member and a wire.

FIG. 2 is an exploded perspective view showing a positional relationship among an armature, an auxiliary member, and a wire.

FIG. 3 is a perspective view showing an auxiliary member structure.

FIG. 4 is a vertical sectional side view showing a state where the armature is fixed to an auxiliary member and a wire.

FIG. 5 is a perspective view of another embodiment of the auxiliary member.

FIG. 6 is a perspective view of still another embodiment of the auxiliary member.

FIG. 7 is an explanatory diagram showing a positional relationship between a rear end portion and a front end portion of a wire.

FIG. 8 is a vertical sectional side view showing an internal structure of the wire dot printer head.

FIG. 9 is an exploded perspective view of the wire dot printer head.

FIG. 10 is a diagram illustrating attachment of an armature, an auxiliary member, and a wire.

FIG. 11 is a perspective view of another embodiment having a different armature structure.

And FIG. 12 is a perspective view showing a conventional armature and a fixed wire.

FIG. 13 is a perspective view showing a conventional fixing of an armature and a wire.

[Explanation of symbols]

 HP wire dot printer head (main body) 21c core 25 coil 110 armature 120 wire 130 auxiliary member 130a peripheral wall 131 insertion hole 132 communication passage 140 wire support member

Claims (7)

[Claims] 1. A plurality of cores, each of which is arranged annularly in a body and has a coil wound thereon, and a fulcrum provided in the vicinity of the core by arranging a base corresponding to the core and energizing the coil. An armature whose free end operates as a rotation center, and an auxiliary member having an insertion hole and having a communication path different from the insertion hole communicating with the insertion hole are provided, and one end of the wire is provided in the insertion hole. A wire dot printer head, wherein at least a part of the wire is penetrated, and at least the penetrating portion of the wire and the auxiliary member are integrally fixed to a tip end on a free end side of the armature. 2. The wire dot printer head according to claim 1, wherein said communication path of said auxiliary member is formed by a linear slit parallel to a center axis of an insertion hole of said auxiliary member. Printer head. 3. The wire dot printer head according to claim 1, wherein said peripheral wall has a cylindrical shape, and said communication path has a spiral shape (N is an integer equal to or greater than 1) along the peripheral surface of said peripheral wall. A wire dot printer head formed by a slit. 4. The method for fixing an armature and a wire in a wire dot printer head according to claim 1, wherein a portion of the wire is loosely inserted into an insertion hole by a positioning means to position the auxiliary member. Performing a step of causing a part of the penetrated wire and the auxiliary member to face a distal end portion of the free end side of the armature; and connecting the part of the penetrated wire and the auxiliary member in a loosely fitted state to the armature. Fixing the armature and the wire by simultaneously fixing the armature and the wire to the free end side of the armature. 5. The method according to claim 1, wherein the armature and the wire are fixed to each other by positioning a part of the wire through the insertion hole in a play-fit state by a positioning means. Fixing the auxiliary member and the wire, causing a part of the penetrated wire and the auxiliary member to face a free end side tip of the armature, and penetrating the wire in a loosely fitted state. Fixing the armature and the wire by simultaneously fixing a part of the armature and the auxiliary member to the free end side tip of the armature. 6. The method according to claim 4, wherein the armature and the wire are fixed to each other in the wire dot printer head, wherein the positioning means is a wire support table having at least a positioning surface formed of a non-magnetic member. A method for fixing an armature and a wire in a wire dot printer head. 7. A wire dot printer head comprising: an insertion hole through which a part of one end of a wire is loosely inserted; and a communication path different from the insertion hole which communicates with the insertion hole. An auxiliary member used for fixing the armature to the wire.