JPS6112356A - Apparatus for fixing printing head - Google Patents

Abstract

PURPOSE:To enable moding by an inexpensive mold by making it possible to bring the pull-out direction of a mold for forming a mount hole and that of a mold for molding the bottom surface of a support to the same or vertical direction, by providing the mount hole to the mount surface of the support by drilling in parallel to the bottom surface of the support. CONSTITUTION:The cross-sectional shape of the leaf spring pressing plate 7 in an apparatus for fixing a spring charge type dot printer printing head is an L- shape one and this L-shape pressing plate 7 is arranged to a mount surface 11 so that the L- shape surface 7b in mated with the lower end part 5b of a leaf spring 5 and, when the shaft part of a screw 10 is threaded with the mount hole 12 of the mount surface 11 through the mount hole 7a of the pressing plate 7 and the mount hole 5c thereof, the surface 7c of the pressing plate 7, with which the head part of the screw 10 is mated, is vertical to a bottom surface 12. Therefore, when the lead spring 5 is fixed by the pressing plate 7 and the screw 10, a press screw hole 12 becomes parallel to the bottom surface 12 of a support 3 and, when the support 3 and the mount hole 12 are molded, the pull-out direction of the mold for molding the screw hole 12 can be selected in parallel to or at a perpendicular direction to the pull-out direction of the mold for forming the bottom surface 12 of the support 3 and pull-out operation becomes simple.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dot fixing device for printing on a spring-charged dot printer.

2. Description of the Related Art The print head section of a conventional spring-charged dot printer is shown in FIGS. 5 and 6. 1 is a comb-shaped yoke, and degaussing coils 4, 4, . . . are wound around its teeth ja, la, . A permanent magnet 2 is held between the bases 1b and 1b of the two yokes 1 and 1. One end 5a of a leaf spring 5, 5... with a printing hammer 6.6... attached to the tip face 1c, 1C... of the yoke teeth 1b, 1b...

5a... is attracted (adsorbed). The leaf spring 5 has the other end 5b.

5b... are connected together by a common board 8, and the bottom end of the U-shaped support 3 is fixed to the surface 11 via the holding plate 7 and fixing screws 10, 10... Ru. The permanent magnet 2 is sandwiched between two yokes 1, 1, and is sealed and fixed inside a support 3 made of resin or the like, leaving the toothed tips of the yokes intact. Demagnetizing coils 4, 4... are also enclosed.

At this time, in order to obtain a larger suction force, use a leaf spring of 5°5.
One end 5a, 5a... is the suction surface 1c at the tip of the yoke teeth.

The plate spring of the support is attached so that the suction surfaces of the plate spring and the yoke are parallel when the IC is attracted to the IC.
It has a slope of 1.

When the plate spring 5 is attached to the support body 3 using the plate 7 and the fixing screw 10, the hole 12 is formed perpendicular to the plate spring fixing surface 11 of the support body.

The screws 10 are installed through the holes 7a and 5c, 5c, etc., drilled in the holding plate 7 and the other ends 5b, 5b, etc. of the plate springs, and the screws 10 are installed in the holes 12, respectively, on the surface 11.

Problems to be Solved by the Invention For this reason, the mounting hole 12 must be formed at an angle with respect to the bottom surface 13 of the support 3, and the direction of mold removal when the support 3 is molded from resin is limited. However, the mold for forming the outer shape of the bottom surface of the support 3 and the mounting thereof are different from the mold for forming the hole 12, making the mold complex and expensive.

Furthermore, when attaching screws, etc., the member 10 must also be inserted at an angle to the bottom surface 13 of the support body 3, resulting in poor workability.

Means for Solving the Problems In order to solve these problems, the present invention provides mounting holes 12 formed in the bottom surface 13 of the support 3.
The hole is drilled parallel to the The surface of the presser plate 7 that comes into contact with the leaf spring 5 is arranged parallel to the surface 11 and inclined to the bottom surface 13, but when mounting screws, etc. on the opposite surface, the heads of the members 10 abut against each other. The surfaces were arranged in a perpendicular relation to the bottom surface 13, and the mounting was such that the member 10 was inserted parallel to the bottom surface 13.

For this reason, even though the surface 11 is inclined with respect to the bottom surface 13, the surface 11 is mounted in the hole 12, and the member 10 is mounted in a direction parallel to the bottom surface 13. The attachment of the surface 11, the shaping of the hole 12, and the attachment of the member 10 can be made simple and easy.

Embodiment FIG. 1 shows an embodiment of the present invention, and is a sectional view corresponding to FIG. 2. Identical parts in FIG. 1 that correspond to FIG. 2 are designated by the same reference numerals, and explanations thereof will be omitted. What is new is the shape of the leaf spring holding plate 7 and the attachment of the support body 3 in the direction of the hole 12 drilled in the surface 11.

The shape of the presser plate 7 is L-shaped in cross section.The L-shaped presser plate 7 is installed by placing the L-shaped surface 7b against the lower end 5b of the leaf spring 5 on the surface 11, and The plate 7 is installed from the hole 7a, the plate spring 7 is installed through the hole 5C, and the shank of the screw 10 is installed.The surface 11 is installed using a retaining plate with which the head of the screw 10 collides when screwed into the hole 12. The surface 7C of 7 is perpendicular to the bottom surface 12. For this purpose, hold the plate spring 5 with the plate 7 and the screw 1.
0, the presser screw hole 12 will be inserted into the support bottom surface 1
2, and when molding the hole 12 for mounting the support 3, select the tangential direction of the mold forming the screw hole 12 to the mold forming the bottom surface 12 etc. of the support 3 to be parallel or perpendicular. It can be done easily. Further, the direction of attachment and detachment of the screw 10 is also parallel to the bottom surface 12, which makes it easier.

Furthermore, since the leaf spring holder shown in Fig. 1 is L-shaped, it has the effect of strongly tightening the upper and lower ends of the leaf spring fixing surface of the support body to stabilize the characteristics of the leaf spring. .

The present invention is not limited to the embodiment shown in FIG. 1; for example, the yoke may be fixed to the upper end of the support body 3 using fixing means such as screws without being encapsulated. In addition, the shape of the leaf spring presser is also L.
It is not limited to the shape, but may be a U-shape, a concave shape, a crescent shape, or a trapezoid shape as shown in FIGS. 2 to 4. In these cases, it is important to ensure that the shaft of the screw 10 is inserted in a direction substantially parallel to the bottom surface 12, and that the head of the screw 10 abuts and stops in a plane perpendicular to the bottom surface 12. That's true.

Effects of the Invention As described above, according to the present invention, when mounting the support body at an angle, the hole is made parallel to the bottom surface of the support body, and when the support body is mounted at an angle, the hole is made parallel to the bottom surface of the support body. The cutting direction of the mold that forms the bottom surface of the mold can be in the same direction or in the vertical direction,
Can be easily and inexpensively molded. Furthermore, the attachment and detachment of screws, etc., and the attachment and detachment of members are parallel to the bottom surface of the support, which has the effect of making workability and handling easier.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention. 2-4 are partial cross-sectional views of different embodiments of the present invention. FIG. 5 is a partially cutaway perspective view of the conventional example, and FIG. 6 is a sectional view taken along line AA in FIG. 1 is a yoke, 2 is a permanent magnet, 3 is a support body, 4 is a degaussing coil, 5 is a leaf spring, 6 is a printing hammer, 7 is a holding plate, 8 is a common board for leaf springs, 10 is a fixing screw, 11 is an inclined mounting The face,
12 is the bottom.

Claims (1)

[Claims] A magnet, a yoke, and a degaussing coil constitute an attraction mechanism, and one end of a plate spring having a printed hammer on the surface of the yoke is attracted by the magnetic force of the magnet against the elasticity of the plate spring. , forming on the support an inclined mounting surface on which the other end of the leaf spring is attached at an angle so that when the one end of the leaf spring is attracted by the magnet, the one end of the leaf spring and the yoke attracting surface are parallel to each other; A mounting hole is formed in the inclined mounting surface to insert one end of a mounting member such as a screw, and the other end of the leaf spring and a holding plate are sequentially overlapped on the inclined mounting surface, and the holding plate is drilled. The plate spring is clamped between the inclined mounting surface and the holding plate by the mounting member inserted into the mounting hole of the inclined mounting surface through the provided mounting hole, and the degaussing coil is caused to flow through the yoke surface. In a spring-charged dot impact print head in which the plate spring is released from the plate spring and the printing hammer performs impact printing using elastic strain energy generated in the plate spring, the mounting hole in the inclined mounting surface of the support body is connected to the support body. A print head fixing device characterized in that the print head fixing device is formed substantially parallel to the bottom surface of the support body, and the mounting member is inserted from the mounting hole of the holding plate into the mounting hole of the inclined mounting surface substantially parallel to the bottom surface of the support body. .