JPS61160268A - Printer - Google Patents

Abstract

PURPOSE:To enhance the accuracy of the mount position of a carriage, by fixing the front part of the carriage to a bearing shaft and directly contacting the rear part thereof with the bearing shaft. CONSTITUTION:A carriage 2 is fixed so as to be capable of moving on the stator 3 of the linear motor arranged in parallel to the shaft of a platen 1. The slider 4 moving on the stator 3 and provided with a bearing shaft 4a is contacted with the stator 3 through a roll. The carriage is fixed to the bearing shaft 4a and the front part thereof is fixed through a bracket 5 and the rear part thereof is provided on the bearing shaft by the protruded part 2a formed to the carriage 2. The dimensional accuracy of the bearing shaft is enhanced by this constitution and the up-and-down positional determination of the carriage can be accurately performed.

Description

[Detailed description of the invention] [Branch] The present invention relates to a printer equipped with a carriage.

[Prior art]

Conventionally, in printers such as typewriters in which a carriage is moved in the axial direction of a platen, the method of mounting the carriage on a shaft disposed parallel to the platen has been to fix the carriage via a bracket. However, since high precision is required in the vertical positional relationship between the branch and the printing means, the positioning of the carriage at the -L lower position must be performed accurately. For this reason, high dimensional accuracy is required for individual parts such as brackets.

〔the purpose〕

The present invention provides a printer that can improve the precision of the mounting position of the carriage.

〔Example〕

FIG. 1 is a perspective view showing an embodiment according to the present invention.

In the figure, KB is a keyboard with character keys,
It has control keys to input control commands for characters, margins, tabs, and a collection.

P is the printer section, and platen 1 is where the printing paper is wrapped.
It has a carriage 2 equipped with a printer and a print head. Characters input from the keyboard KB are printed by the printer section P.

FIG. 2 is a detailed diagram of the printer section P shown in FIG. 1.

1 is a platen shown in FIG. 1, around which printing paper is wound.

Reference numeral 2 denotes a carriage shown in FIG. 1, which is fixed so as to be movable on a stator 3 of a linear motor arranged parallel to the axis of the platen 1.

A slider 4 moves on the stator 3. Such a slider has, for example, four poles, is excited in one phase or two phases by electric pulses, and moves on the stator 3. 4a is a bearing shaft provided on the slider 4, and the slider 4 is in contact with the stator 3 through rollers 4b.

The carriage 2 is fixed on such a bearing shaft 4a. As shown in FIG. 3, the front part of the carriage is fixed via a bracket 5, and the rear part of the carriage is provided on the bearing shaft by a protrusion 2a formed on the carriage 2.

A ribbon cassette 6 is placed on a cassette frame 7 provided on the upper part of the carriage 2.

8 is a hammer, which is electromagnetically driven.

Reference numeral 9 denotes a diegewheel having type, which is pressed by a hammer 8 and impacts the printing paper 10 on the platen 1- through an ink ribbon supplied from a cassette 6.

Reference numeral 11 denotes a print paper holder that guides the print paper on the platen.

The front part of the carriage is fixed to the bearing shaft 4a through the bracket 5 like a double series, and the rear part of the carriage is brought into direct contact with the bearing shaft 4a by the projection 2a of the carriage. In this way, the high dimensional accuracy of the bearing shaft allows for accurate vertical positioning of the carriage.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view of the printer section, Fig. 3 is a side view of the printer section, 4--Slider 4a--Bearing shaft 2- --- Carriage 2a --- One convex part

Claims (1)

[Claims] a slider including a platen, a stator of a linear motor arranged parallel to the axial direction of the platen, a rotating member that moves on the stator, and a slider placed via the rotating member of the slider and facing the platen; a carriage having printing means disposed thereon;