JPS60159658U - Typewriter ribbon lift mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a partial side view showing the ribbon lift mechanism of a typewriter that embodies this idea, Figure 2 is a partial vertical sectional view showing the printing mechanism, and Figure 3 is an enlarged cross-sectional view of the ribbon lift cam portion of the ribbon lift mechanism. Top view, Figure 4 is A- in Figure 3.
FIG. 5 is a partial side view showing the correction ribbon feeding mechanism, and FIG. 6 is a time chart showing the activation signal of the electromagnet during printing operation. 3 is a carriage, 14 is a holder, 15 is a printing ribbon,
18 is a correction ribbon, 22 is a tension spring, 23 is a drive motor, 36 is a ribbon lift cam, 47 □ is a first cam groove, and 48 is a second cam R&S. is the first partition wall, 51 is the second partition wall, 52 is the third cam groove, 53 is the third partition wall, 54.55 is the fourth partition wall, 56 is the cam follower, 58 is the follower pin, 61 is an electromagnet. Mi Te = = Yo song 47 5) a --

Claims (1)

[Claims for Utility Model Registration] A typewriter that has a correction ribbon 18 and a printing ribbon 15 and performs a plurality of printing operations by placing the correction ribbon 18 at a printing position to imitate a correction operation, the correction ribbon 18 supports both ribbons 18.15 so as to be positioned below the printing ribbon 15, and is swingably supported by a spring 22 to selectively place both ribbons 18.15 in the upper printing position. A holder 14 that is always biased to swing downward toward the rest position, a first cam groove 47 for swinging the holder 14 to place the printing ribbon 15 in the printing position, and the first cam groove 47. 47 and a second cam groove 48 for arranging the correction ribbon 18 at the printing position;
The correction ribbon 1 shares a part with the second cam groove 43 and is continuous with the second cam groove 48 and is disposed at the printing position.
a third cam groove portion 52 for maintaining 8 in that state;
It is provided at the boundary between the common part of the first and second cam grooves 47 and 48 and the part where both cam grooves are separated by the first partition wall 50, and is at the same height as the first partition wall 50. A different second partition wall 51 and the second and third cam groove portions 48
．． Both cam grooves are connected to the first partition wall 5 from the common part of the partition wall 52.
0 and a fourth partition wall 54 and 55 having the same height as the second partition wall 51. - a drive monitor 23 that rotates the ribbon lift cam 36 in one direction; - a drive monitor 23 that is connected to the holder 14 and that drives the ribbon lift cam 3;
one cam follower 56 that is operated following the cam follower 56, and a position where the cam follower 56 is supported and engages with the second and fourth partition walls 51, 54. 51, 54.55, and a follower pin 58 that is movable between positions where it can pass over the second and fourth partition walls 51, 54. Follower pin 58 by selecting whether to enable 55 or not.
and an electromagnet 61 that selectively engages the respective groove portions <7°48.52, and the electromagnet 61 is selectively activated during a correction operation to move the follower pin 58 from the second cam groove portion 48 to the third cam groove portion 48. A ribbon lift mechanism for a typewriter, characterized in that the ribbon is moved to a third cam groove 52 and engaged along a third cam groove 52 until the plurality of typing operations are completed.