JPS6184257A - Printer head for wire dot recorder - Google Patents

Abstract

PURPOSE:To reduce manhours in assembling, and at the same time to effectively produce a damping effect to satisfactorily reduce vibration to occur along with a printing work by integrating a stopper and a shock absorbing weight. CONSTITUTION:Corresponding to plural number of exciting coils 6, armatures 8 to which tips print wires 19 are fixed are arranged to the printing head. The exciting coils 6 drive respective armatures 8 correspondingly to printing pattern signals, and the printing wires 19 are made to protrude. The stoppers 12 that are provided on the opposite side of the exciting coils 6 side of the armatures 8 and that support the vicinities of the tips of the armatures 8 and the weights 14 that are provided underneath the stoppers 12 and that absorb shock of printing operation together with leaf springs 13 etc. are constituted integrally. Manhours that were required in the previous method to mount stoppers and weights are now eliminated and, at the same time, the effect of the dampers that are constituted with weights 14, leaf springs 13, etc. is better displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to the structure of a print head of a wire dot recording device.

[Prior art]

The wire dot recording device is configured to perform dot printing while causing a plurality of print wires to project from a plurality of excitation coils in accordance with a print pattern signal. Each printed wire is fixed to the tip of an armature and is operated by attracting a given armature with an excitation coil.

As this type of recording apparatus, one having the structure shown in FIG. 1 has been proposed. That is, in FIG. 1, an upper body 1 and a lower body 2 having an internal space are joined at their open ends, and a boss member 3 is disposed in a casing forming a closed space, and a boss member 3 is disposed around the boss member 30. A side yoke 4a is integrated. Further, the boss member 3id is fitted with the yoke 4. Furthermore, the yoke 4
An electromagnet consisting of a core iron 5 and an excitation coil 6 wound around the core is installed inside the yoke, and an armature 8 having a plunger is installed on the lower side (rear side) of the side yoke 4a. . This armature 8 and the plungers 7 fixed thereto are arranged radially corresponding to each of the core iron cores 5 of a plurality of times (for example, 24 times). The magnetic flux path of the electromagnet is formed by the core core 5, yoke 4, side yoke 4a, and plunger 7, as shown by σ in FIG.

On the other hand, a leaf spring holding member 9 is fixed in the lower body 2 by screws 10, and a back holder 11 arranged at the center of the leaf spring holding member 9 has an upper (front side)
As shown in FIG. 2, a stopper 12 is held on the four parts 11a, and a weight 14 made of lead or the like is held on the lower four parts 11b via a disc spring 13. A damper composed of a weight 14 is designed to suppress vibrations (particularly resonance phenomena) accompanying the printing operation, and to accurately control the movement of each armature 8 and each print wire 15 connected thereto. There is.

However, in the conventional structure, the stopper 12 is placed in the upper recess 11a of the bag holder 11, and the lower recess 1
Since all the weights 14 are assembled to 1b, not only is it time-consuming to assemble, but the presence of the back holder 11 makes it possible to fully utilize the damper effect made up of the weights 14 and disc springs 13. There is a problem in that all vibrations cannot be sufficiently reduced.

〔the purpose〕

The object of the present invention has been made in view of the above-mentioned drawbacks, and it is possible to reduce the assembly time and to make the printing of a wire dot recording device capable of fully utilizing the damper effect and effectively reducing the vibrations accompanying the printing operation. It is in providing the head.

[Summary]

In order to achieve such an object, the present invention includes a stopper that is disposed on the side opposite to the excitation coil side of the armature and supports the vicinity of the tip of the armature, and a stopper that is disposed below the stopper and that is disposed on the side opposite to the excitation coil side of the armature and that supports the vicinity of the tip of the armature. It has a structure that is completely integrated with a weight that absorbs the impact.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIG. 3 shows the structure of the print head of the wire dot recording device according to the present invention. FIG. 2 is a vertical cross-sectional view showing the same parts as in FIG. 1 with the same reference numerals. Each of the armatures 8 is positioned by a pin 15 fixed to the lower side of the side yoke 4a and a hole 16 into which the granger 7 is loosely fitted,
The plate spring holding member 9 and the screw 10 press the lower surface of the side yoke 4a by the plate springs 1T, which are arranged at a plurality of positions in the circumferential direction, that is, corresponding to each armature 8, and then return the vicinity of the tip thereof to the spring 18 and It is held in place by a stopper 12. Therefore, in a normal state, the armature 8 is in a lower non-operating position (retracted position) where it abuts the stop horn (12) by the return spring 18, as shown in FIG.
When the spring 1 is attracted upward by the electromagnet,
8, the tip thereof is displaced upward by a predetermined distance to reach the operating position.

Further, the base end (rear end) of a print wire 19 is coupled to the tip end of each of the armatures 8 arranged in a radial manner (for example, 24 armatures). The print wire 19 passes through the inside of the boss member 3, and is further slidably guided by a plurality of kites 20, 21, 22, 23 and extends to the upper end (print head tip) in FIG. are doing.

On the other hand, a printed circuit board 25 is attached to the upper side of the yoke 4 via an aluminum spacer 24 for heat radiation. The electric circuit on this printed circuit board 25 and the excitation coil 6 are connected via terminals 26 and 27.

Therefore, the displacement of each armature 8 is controlled by fully controlling the code signals introduced via the printed circuit board 25 to fully control the energization of each of the plurality of (for example, 24) excitation coils 6. , while controlling the displacement (protrusion or normal retraction position) of these print wires 19, predetermined characters are printed on the recording paper 28 in correlation with the control of the moving speed of the print head in the width direction of the recording paper 28. Or record images.

By the way, in the structure of this embodiment, as shown in FIG. 4, the member corresponding to the conventional bag holder is eliminated, and a weight 14 made of lead or the like is placed below the stopper 12.
This is a structure in which the parts are integrally fixed by direct baking or other means.

The weight 14 is supported by the lower body 2 through the disk spring 13, and the weight 14 and the disk spring 13 constitute a damper to absorb shock during printing operations.

Therefore, in the structure of this embodiment, the effort of assembling the stopper 12 and the weight 14 to the back holder 11 one by one as in the conventional case can be omitted, and therefore the assembly effort can be reduced. Also, by eliminating the back holder 11 and attaching all the weights 14 directly to the stopper 12, it is possible to eliminate the problem that the damper effect is reduced by the back holder 11 as in the past. The effect is that the effect can be fully demonstrated.

〔effect〕

As explained above, according to the print head of the wire dot recording device according to the present invention, there is provided a stopper which is disposed on the side opposite to the excitation coil side of the armature and supports the entire vicinity of the tip of the armature, and a stopper disposed below the stopper. Since it has an integrated structure with a weight that absorbs the shock during printing operation, it saves the effort of assembling the stopper and weight to the back holder compared to the conventional method, and the effect of the damper composed of the weight etc. is reduced. It has excellent effects that can be fully utilized.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing the structure of a print head of a conventional wire dot recording device, FIG. 2 is an exploded perspective view of the back holder, stopper, and weight shown in FIG. 1, and FIG. 3 is a wire dot recording device according to the present invention. FIG. 4 is a vertical sectional view showing the structure of the print head, and FIG. 4 is an assembled perspective view of the stopper and weight. 6... Excitation coil, 8... Armature, 12...
・Stopper, 13...Disc spring, 14...Death mori, 1
9...Printed wire.

Claims (1)

[Claims] A wire comprising an armature arranged corresponding to a plurality of excitation coils and having a printed wire fixed to the tip thereof, and causing the printed wire to protrude by driving each armature by the excitation coil in accordance with a printed pattern signal. In a print head of a dot recording device, a stopper is disposed on the side opposite to the excitation coil side of the armature and supports the vicinity of the tip of the armature, and a stopper is disposed below the stopper and absorbs shock during printing operation. A print head for a wire dot recording device characterized by an integrated weight.