JPH0639976Y2 - Pin guide mechanism - Google Patents

Description

[Detailed Description of the Invention] [Outline] Regarding a pin guide mechanism for a dot pin used in a dot printer, the dot used in the dot printer is intended to achieve strong workability and firm adhesion of the pin guide part to the base. In a configuration in which the pin guide of the pin is fixed to the base with an adhesive, a pin guide made of a ceramic material provided with a plurality of pin holes for guiding the dot pins, a pin guide portion integrally embedded by being embedded in a resin material, On both side surfaces of the resin material portion of the pin guide portion, a concave portion and a convex portion that form an accommodation space for the adhesive when the pin guide portion is fitted into the concave portion of the base are provided in a direction intersecting the pin hole. It has a different configuration.

[Industrial application field]

This invention relates to a pin guide mechanism for a dot pin used in a dot printer.

The printing mechanism of the flat coil type wire dot printer is
Place the coil base between the permanent magnets, energize the flat coil provided on the coil base, move the flat coil according to Fleming's left-hand rule, and the dot pin provided at the tip of the coil base passes through the ink ribbon. Hit the paper and print.

The dot pin of this type of wire dot printer is guided by a pin guide. Since this pin guide requires wear resistance, a ceramic material is generally used and it is adhered to the aluminum base, but this adhesion is weak and there is a problem that it cannot be firmly fixed. There is a need for a pin guide mechanism that is firmly fixed to the base with good workability.

[Conventional technology]

FIG. 3 is a partial sectional view for explaining a pin guide mechanism of a conventional wire dot printer. A dot pin 7 is provided at the tip of the coil base 3, a leaf spring 5 is provided at the rear end, and a flat coil 2 is provided at the center.

On the other hand, when the permanent magnet 1 is provided so as to face the flat coil 2, and a current is passed through the flat coil 2, the Fleming's left-hand rule is resisted against the leaf spring 5 supported by the block 6 on the base 4. Accordingly, the dot pin 7 moves in the arrow direction. A pin guide 80-1 is embedded in the base 4 to guide the movement of the dot pin 7. The pin guide 80-1 is made of a ceramic material having high wear resistance, and is fitted in the recess 4-1 of the aluminum base 4 and fixed by an adhesive 9.

[Problems to be solved by the invention]

However, in the conventional pin guide mechanism as described above, since the pin guide 80-1 is formed of a ceramic material, the surface thereof is mirror-like, the adhesiveness of the adhesive is poor, and the adhesive strength to the base 4 is low. small. In addition, the adhesive surface of the base 4 and the pin guide 80-1 needs to be thoroughly degreased.
Sufficient control is required for handling during bonding.

Therefore, in a dot printer that uses a plurality of such pin guides 80-1, if there is insufficient adhesive strength, the dot pins 7 will strike the paper via the ink ribbon to repeat the printing, and the adhesion will be improved. There is a problem that the pin guide 80-1 comes off from the base 4 due to the separation, and a print failure occurs.

In view of the above-mentioned conventional circumstances, the present invention has an object to provide a pin guide mechanism which has a good workability with respect to the pin guide portion with respect to the base and has a strong attachment strength.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention guides the dot pin in a structure in which the pin guide 8-1 of the dot pin used in the dot printer is fixed to the base with an adhesive as shown in the principle diagram of FIG. A plurality of pin guides 8-1 made of a ceramic material having a plurality of pin holes 8-2 arranged side by side are formed mainly by injection molding a pin guide portion 8 which is embedded in a resin material, and both side surfaces of the pin guide portion 8 are formed. Has a concave portion 8-3 and a convex portion 8-4 formed in a direction orthogonal to the pin hole 8-2. When the pin guide portion 8 is embedded in the concave portion of the base, the concave portion 8-3 and the concave portion 8-3 are formed. The convex portion 8-4 and the convex portion 8-4 form a space for accommodating the adhesive.

[Action]

When the pin guide portion 8 is adhered to the concave portion 4-1 of the base 4 with an adhesive, the pin guide portion 8 is adhered to the concave portion 8-3 of the pin guide portion 8 and the periphery of the convex portion 8-4 so as to fill the adhesive. .

In this way, the adhesive area is increased, and the uneven portions 8-3 and 8-4 filled with the adhesive are prevented from coming off, and at least a plurality of pin guide portions 8 are fixed in one step,
The chance of surface contamination at the time of adhesion is reduced, and strong adhesion is possible.

〔Example〕

FIG. 2 is a partial cross-sectional view of a printing portion of a dot printer to which the present invention is applied. The pin guide mechanism which is a feature of the present invention will be described with reference to FIG. Note that the same parts as those in FIG.

Pin hole 8-2 for guiding the dot pin 7 as shown in FIG.
To the pin guide 8-1 made of ceramic material, for example, 4
There are some places. For example, two pin guides 8-1 are formed by injection molding in a state in which two pin guides 8-1 are arranged in parallel at a predetermined interval as shown in the figure and are embedded with a resin material. Can be easily obtained.

Further, a concave portion, that is, a V groove 8-3 and a convex portion 8-4 are provided on both side surfaces of the pin guide portion 8 in a direction orthogonal to the axial direction of the pin hole. It should be noted that the convex portion 8-4 may be produced by utilizing the resin injection port at the time of resin molding.

As shown in FIG. 2, the pin guide portion 8 is fitted in the concave portion 4-1 of the base 4 and adhered by the adhesive agent 9. At this time, the adhesive 9 fills the space formed by the V-groove 8-3 and the convex portion 8-4.
In 4-1 it will play the role of a wedge. Further, the adhesion area of the pin guide portion 8 also increases as compared with the conventional structure shown in FIG.

Therefore, the adhesive force of the pin guide portion 8 with respect to the base 4 is increased, and the pin guide portion 8 is prevented from coming off due to the uneven portion, so that strong adhesion of the pin guide portion can be easily realized.

In the above description, an example in which two pin guides are provided and four pin holes are provided in the pin guide has been described, but an arbitrary number may be used.

[Effect of device]

As is clear from the above description, according to the pin guide mechanism of the present invention, a pin guide portion having a plurality of pin holes can be easily manufactured, and when fixing to the base with an adhesive, a conventional example is used. Since it is possible to omit the degreasing treatment of the adhesive surface and the like, workability is improved, and it is possible to prevent the occurrence of obstacles such as the pin guide coming off from the base during printing.

[Brief description of drawings]

FIG. 1 is a principle view of a pin guide mechanism according to the present invention, FIG. 2 is a partial sectional view of a printing portion of a dot printer to which the present invention is applied, and FIG. 3 is a pin guide mechanism of a conventional dot printer. FIG. In FIGS. 1 and 2, 4 is a base, 4-1 is a base recess, 7 is a dot pin, 8 is a pin guide part, 8-1 is a pin guide, 8-2 is a pin hole, and 8-3 is V. Grooves, 8-4 are convex portions, and 9 is an adhesive, respectively.

Claims (1)

[Scope of utility model registration request] 1. A structure in which a pin guide (8-1) of a dot pin (7) used in a dot printer is fixed to a base (4) with an adhesive (9), and a plurality of guides for guiding the dot pin (7) are provided. Pin holes for (8-2)
Pin guide (8-1) made of ceramic material with
Pin guide part (8) embedded in resin material and integrally configured
And a space for accommodating the adhesive when the pin guide portion (8) is fitted into the recess (4-1) of the base (4) on both side surfaces of the resin material portion of the pin guide portion (8). Recess to be formed (8-
A pin guide mechanism characterized in that 3) and a convex portion (8-4) are provided in a direction intersecting with the pin hole (8-2).