JPS61293858A - Type bar for typewriter, etc. - 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 object of the present invention is a typewriter, etc., which is arranged in a matrix mold and has characters that can be adjusted with respect to the printing position by IJ lux movements in the X and Y directions. Regarding the type bar.

This type of type bar is disclosed, for example, in U.S. Patent No. 56,952.
04 or European Patent Publication No. 19455. There K is arranged in a frame with individual types of substrates 1 movable against the action of springs. The entire frame has a relatively large mass that must be moved in the X and Y directions for positioning the individual characters relative to the print position. It is self-evident that it is advantageous if the movable mass is kept as small as possible.

Other type bars, such as U.S. Pat. No. 3,589,494
is known, in which a type bar is arranged on an elastic finger, the type bar having a cage shape.

However, these type bars are not suitable for linear drive because they must be rotated about a vertical axis for adjustment of the characters to be printed.

The object of the invention is to create a type according to the general concept of claim 1, which on the one hand has a low mass and, on the other hand, is easy to manufacture. For this purpose, the configuration of the type bar according to the features of claim 1 is suitable.

In this case, the elastic fingers with edge plates can be produced from sheet steel or plastic in a single processing step. If the elastic fingers consist of sheet steel, the type head with letters can be die-cast in a second processing step. However, if the fingers are made of synthetic resin, the type head can also be injection molded in the same molding process. However, it is also possible to injection mold the type head from other materials in a second processing step. The arrangement of characters in at least two groups has the advantage that the selection of the width of the characters can be made appropriately. The distance from type head to type head in the inner group is therefore wide enough to allow the elastic fingers of the other groups to protrude. These features are included in claim 2.

According to the features of claim 3, it is also possible to manufacture both groups of type heads with fingers separately and then to integrate them with one another.

This arrangement is such that the elastic fingers of both groups each have equal lengths, thereby creating a common line of flexure. In this connection, it makes sense to form the characters according to the features of claim 4. Uniform character printing can thereby be achieved depending on the position of the characters on the type head. If a typehead is formed according to the features according to claim 3, an additional correction of the character position by lateral centering during printing is obtained. For printing purposes, the electromagnetically driven ram can be provided with a notch.

Embodiments of the present invention will be described based on the drawings.

The type bar according to FIG. 1 consists of a rim plate 1 which is provided with fingers 2 of different lengths. A type head 3 or 4 is in each case injection molded on the free end of the elastic finger 2, which in the illustrated embodiment has three letters 5 or 6 in each case. Type head has two groups A
and B, where group B includes narrow characters such as ignH+, etc. - blade group A includes narrow characters such as ignH+, etc.
Contains wide characters such as. Thereby, the distance between the type heads 3 of group B can be made somewhat wider, so that the elastic fingers 2 of group A have sufficient room between the type heads 3. As mentioned at the outset, the edge plate 1 with the elastic fingers 2 can be made of sheet steel or of plastic.

FIG. 2 shows a three-part type bar, in which the edge plate 7 is provided with an elastic finger 8 and the second edge plate 9 is provided with an elastic finger 10. These edge plates can also be made of synthetic resin or spring steel. In this case as well, the type heads 11 and 12 are divided into groups A and B.

As can be seen from the drawing, the length of the elastic finger 8 is exactly equal to the length of the elastic finger 10 measured from the respective type head 11 or 12 to the edge of the edge plate 7 or 9. This results in equal deflection lines for both groups A and B of type heads 11 and 12. As can be seen from FIG. 3, the elastic fingers 8 of the edge plate 7 and the elastic fingers 10 of the edge plate 9 are bent so that the printing surface 14 of the characters is located on a common plane 13 indicated by a dashed line. This means that the characters are all equidistant from the printing counterposition, for example the platen. Since the letters 5 or 6 are arranged within the group at a corresponding distance to the respective edge plate 7 or 9, it makes sense to take this position into account when manufacturing the injection mold. That is, the printed surfaces 14 of the characters are at a predetermined angle from each other. This is also clear from Figure 3.

The edge plates 7 and 9 can be connected to each other by rivets 15 or similar connecting elements and can be mounted on the rotor of the near motor. Character 3 being printed,
For centering of 6, type head 3, 4/11, 12
A centering key 16 can be provided on the back side of the holder. The centering key cooperates with a wedge-shaped recess in the ram of the printing hammer.

However, the centering element can also be designed in other shapes. For example, type head s, 4/11. A keyway can be formed in 'I2, and the ram of the printing hammer is wedge-shaped.

It is clear from the drawings and the above description that the type bar according to the invention has a low mass. Even if we ignore the embodiments according to FIGS. 2 and 3, very little assembly work is required. However, insofar as assembly operations are necessary for the embodiments according to FIGS. 2 and 3, simple steps are concerned that can also be carried out automatically without great expense.

[Brief explanation of drawings]

1 is a plan view of a one-piece type bar, FIG. 2 is a plan view of a two-part type bar, and FIG. 3 is a side view thereof. Symbols in the figure 1/7, 9 Edge plate 2/8, 10 Finger 3.4/11, 12 Type head 5.6 Character 13 Plane A Character group B Character group

Claims (4)

[Claims] (1) In a type bar of a typewriter or the like having characters disposed in a matrix mold and adjustable with respect to the printing counterposition by movement of the matrix in the X and Y directions, a plurality of characters (5 , 6) are arranged in a common parallel plane (13) to the printing counterposition) and the elasticity of the two groups (A, B). The fingers (2/8, 10) of one group (A) protrude between the type heads (3/11) of the other group (B);
, 10) are joined at the foot by an edge plate (1/7, 9) (2) The inner group (B) of the type bar (3/11) has characters smaller in width than the type head (12) of the outer group (A). type bar (3) Both groups (A,
B) the fingers (2/8, 10) each have equal length and are each connected to a common edge plate (7, 9), and the type head (3, 4/11, 12) Type bar according to claim 1 or 2, which is formed to lie in a common plane (15). (4) The printing surface (14) of the characters (5, 6) is attached to the type head (
The type bar (5) according to any one of claims 1 to 3, which is shaped depending on its position on the type head (3, 4/11, 12). , 4
/11, 12) is provided with a centering member (16) on the side opposite to the characters (5, 6), according to any one of claims 1 to 4. type bar