KR900001924Y1 - Back rash regulator of gears driving type-carridge - Google Patents

Abstract

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Description

Backlash adjustment device using eccentric shaft of electric typewriter

1 is a perspective view of main parts of an electric typewriter.

2 is an exploded perspective view of the carriage and the wire.

Third is an exploded perspective view of the present invention.

4 is a coupling state of the present invention.

Fifth is an eccentric shaft front view of the present invention.

(A) and (b) of FIG. 5 are gear state diagrams in which backlash is generated and normal gear state diagrams.

(A) (b) is a vertical line state diagram printed in the state of (a) (b) of FIG.

* Explanation of symbols for main parts of the drawings

5: eccentric shaft 51: head

52: driver groove 53: bracket coupling

54: eccentric shaft portion

The present invention relates to a backlash adjustment device using the eccentric shaft of the electric typewriter, which is designed to adjust the backlash between the gear on the motor side, which is the driving source during the transfer of the electric typewriter carriage, and the gear loosening, which is the driving type compound.

In general, the carriage 1 is moved to the printing position for printing by the electric typewriter. Looking at the transmission of the driving force, the gear 21 on the carriage dry motor 2 side and the driving force of the motor are transmitted to the carriage 1. Gear pulley 4 having a gear 41 and a drum 42 on which the wire rope 3 is wound is coupled to the shaft 200 and the connecting member 300 between the bracket 101 of the chassis 100. After the printer receives a command to print (print) from a computer, the carriage drive motor 2 prints the desired text while moving the carriage 1 to the position to be printed.

However, as the carriage 1 repeats the driving several times, the backlash occurs due to the displacement between the gears during the matching driving between the gear 21 of the carriage drive motor 2 and the gear 41 of the gear pulley 4. As a result of the backlash from the desired position, the position of the carriage (1) becomes impossible as a result of accurate positioning of the carriage (1). Disassembly of the motor as a whole, and must be processed by skilled technicians, such as the inconvenience of continuous manufacturing and use, and to reduce the reliability of the product (see Figure 6 (a)), timing 7 As in (a), the vertical lines are misaligned.

Therefore, the present invention is to solve the conventional problems as described above, as the gear pulley to be coupled to the gear of the carriage driver motor is coupled by the eccentric shaft to adjust the backlash between the gear using the driver, so that the carriage is always controlled in the correct position In order to accurately perform the desired factor, it is devised to increase the reliability of the product, which will be described in detail below with reference to the accompanying drawings.

A gear pulley 4 having a gear 41 into which the carriage drive motor 2 is meshed with the gear 21 and a wire rope winding drum 42 is provided between the gear pulley fixing bracket 101 of the chassis 100. In the common to be coupled as the shaft 200 and the connecting member 300 in the carriage to the carriage by the winding or unwinding action of the wire rope by the driving force of the motor, the combined or unwinding of the wire rope by the driving force of the motor is coupled In the conventional method for conveying the carriage by the action, as shown in FIG. 5, the head 51 having the driver groove 52 in the center of the gear pulley 4 and the eccentric shaft 54 having a predetermined length in the center are provided. And an eccentric shaft 5 having a bracket coupler 53 at the end thereof is axially coupled to be engaged with the gear 21 of the carriage cam drive motor 2.

Looking at the effect of the present invention configured as described above, after the printer receives a command to print from the computer, the carriage drive motor (1) rotates the gear pulley (4) to the position to be printed on the drum 42 The wound wire rope 3 moves the carriage 1 to the left or the right by the winding and unwinding operation so that the letters entered are not included.

At this time, when the backlash of the mountain of the gears 21 and 41 is generated by the use of the orene, the driver groove 52 formed in the head 51 of the eccentric shaft 5 is eccentrically rotated by the amount of backlash to generate the backlash. The amount is adjusted to be the main surface (see FIG. 6 (b)) so that the user can always print the state of FIG. 7 (b).

The present invention constituted and operated as described above can solve the backlash generated between the gear of the cam drive motor and the gear pulley due to the long time use of the electric typewriter by simply adjusting the rotation as a driver so that the carriage cam driver motor and Discomfort due to the complete separation of the gear pulley assembly and the effect of being able to simply adjust the backlash without the help of skilled workers.

Claims (1)

Gear pulley 4 having gear 41 engaged with gear 21 of carriage drive motor 2 and wire rope 30 winding drum 42 is mounted on chassis 100 with bracket 101 for fixing the gear pulley. In the common to couple the shaft 200 and the connecting member 300 to the carriage by the winding or unwinding of the wire rope by the driving force of the motor, the gear pulley (4) in the center, upper and lower respectively Electric typewriter, characterized in that the eccentric shaft (5) having a head portion 51 having a driver groove (52) and a bracket coupling hole 53 and having an eccentric shaft portion 54 of a predetermined length in the center portion Backlash Control Device Using Eccentric Shaft