JPS5954572A - Impact dot head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an impact dot head for an impact dot printer that selectively drives wires to form characters in a dot matrix.

Conventionally, in this type of impact dot head, as shown in FIG. 5, when the actuator 22 is operated, at a retaining portion A between the actuator 22 and a fulcrum presser spring 25 that presses the fulcrum portion of the actuator 22. , due to slippage between the gamma unit unit 22 and the fulcrum presser spring 25, wear occurs on both sides, making it impossible to obtain an appropriate fulcrum presser force, resulting in unstable operation of the actuator 22, and wires (not shown). There is a drawback that sufficient printing energy is not transferred to the transmission source i1, resulting in deterioration of printing quality.

Further, in the case of the actuator 32 of the type shown in FIG. 6, it is necessary to use a soft magnetic material because it becomes a part of the magnetic path of the drive coil 35 of the actuator 32i. However, since the soft magnetic material has low hardness, the wear of the actuator 32 at the engaging portion A is extremely severe, resulting in a disadvantage that printing quality deteriorates as described above.

In the impact dot head constructed as described above, there is a major problem in that the operation of the actuator becomes unstable due to wear and the printing quality deteriorates.

Original BJ, l i, j, +81. -f-no1-11 The purpose is to prevent wear of the engagement part between the fulcrum pressing spring and the actuator, maintain operational stability of the actuator, and achieve good printing quality. The objective is to provide an impact don't head that can be maintained.

Hereinafter, the present invention will be explained in detail using examples.

In FIG. 1, the actuator 2 has its rotational fulcrum portion freely guided by the protrusion 4α of the coil bobbin 4, and the fulcrum presser spring 5 pushes the rotational fulcrum of the AkuT Yugotor 2 in the direction of the arrow I ( - The engagement portion between the fulcrum presser spring 5 and the actuator 2 is the second
As shown in the enlarged view of the figure, the fulcrum presser spring 51d has an R shape, and a lubricating member 6 is provided between the R shape portion and the actuator 2. As the lubricating member, a fibrous sheet impregnated with oil or a self-lubricating Teflon sheet is suitable.

The bran layer 13 is fixed to the actuator 2 through the filter t1.
The core 9 provided in a part of the yoke 8 and the suction γζ
((Constituting the part.R) One end of Kubopuator 2 engages with wire 1...h, Wire 1 - J Wire kite 12f/r) and guides the sliding function. The return spring 11, the wire 1, and the actuator 2 are pressed against the stopper 10 and placed in a standby state.

Now, 51 (Lightning is applied to 1:1 Ill. 3 for a suitable length of time. Then, in Fig. 1, the dotted line foundation bundle is generated, which applies a clockwise rotational force of 4 t to the actuator 2, γ Kubuyu. King-
printer 2K (& energize the mating wire 1T-+ and print F] on the uncombed paper I and L in Figure 7J).

At this time, a sliding movement occurs at the engagement portion between the actuator 2 and the fulcrum presser spring 5, but in the present invention, the R shape of the engagement portion between the fulcrum presser spring 5 and the actuator 2 is
7- and 4", 'I edge part lever 6 is interposed to reduce the sliding friction load and improve the wear resistance of this part, and the pressing force by the fulcrum presser spring 5 does not change. If the stability of 2 is not maintained, good printing cannot be obtained.

5 and 4 show other embodiments of the present invention, in which the F-shaped portion of the fulcrum pressing spring 5 and the engaging portion of the actuator 2 with the fulcrum pressing spring 5 are made of H material having slipping properties; For example, it is coated with Teflon.

In FIG. 3, a Teflon coating layer 16 is provided on the P-shaped portion of the fulcrum presser spring 5, and the actuator 2 is pressed through the coating layer 16.
As with the $ male side mentioned earlier, wear resistance and durability are improved.

In FIG. 4, the actuator 2 has a Teflon coating layer 26 and engages with the R-shaped portion of the fulcrum presser spring 5 via the coating layer 26.
It has the effect of improving wear resistance.

In addition to Teflon coating, binarized molybdenum cope-in or the like may be used.

As described in detail below, the present invention makes the pressing part of the actuator of the fulcrum presser spring R-shaped and provides a lubricating member between the actuator and the actuator. Then, Inbak) de Sotoherado, who can maintain the 1' mark of good quality, becomes usable.

[Brief explanation of the drawing]

Fig. 1 is a side view of an impact dot hemmet showing one embodiment of the present invention, Fig. 2 is an enlarged view of its fulcrum, and Figs. 6 1 and 4 are enlarged views of the fulcrum of the embodiment of the invention , FIG. 5, and FIG. 6 are conventional examples. 1... Wire 2... Actuator 5... Drive coil 5... Fulcrum holding spring 6... Lubricating member Applicant Kakigami Epson Corporation Agent Patent Attorney Mogami Mugarasu'S31 Country 2nd Kun 1

Claims (1)

[Claims] a wire, an actuator that engages with the wire, a drive coil that drives the actuator, and the γ
It consists of a fulcrum presser spring that presses the rotational fulcrum part of the Kuchi uniter, and the fulcrum presser spring is a leaf spring whose engagement part with the front P actuator is shaped like a hill, and between the R-shaped part and the aforementioned 1 actuator. An impact dot head characterized by having a lubricating part that is wear resistant.