JPS5816870A - Typewriter - Google Patents

Abstract

PURPOSE:To obtain a small-size, light-weight and fully motor-driven typewriter by a method in which types are provided on the periphery of the top part of a comb-shaped cylinder and printing is made by strikingly pushed from the back of the types. CONSTITUTION:Types are provided on the periphery of the top part of a comb- shaped cylinder, and a code signal-generating disc plate 4 whose periphery is toothed is turned by a motor 5 and a toothed wheel mechanism. Signals from key board switch groups 7-1-7-N are compared with signals from a contactor 8 connected to the signal code signal generating disc plate 4 in a comparator circuit 9 and the disc plate 4 is stopped at the placed where both signals coincide with each other. A solenoid coil 11 is driven by a solenoid coil driving circuit 10, the back of the types 2 is pushed by a striking push mechanism 12, and printing is made on a typewriting paper 15 wound around a platen 14 through a carbon ribbon 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small European electric typewriter. In conventional European typewriters, by pressing a selected key on the keyboard, the type at the tip of the type bar is printed from an ink ribbon onto a sheet of paper wrapped around a platen via an interlocking mechanism. The interlocking mechanism and the use of springs as power for feeding the platen require mechanical strength, and even if it is a portapull type, it is quite heavy.

The present invention provides an all-electric typewriter that is smaller and lighter while retaining the functions of conventional models. 1 each on the outer periphery of the tip.
．． The motor and gear mechanism are installed on the code signal generation disc surface.6. Rotate the keyboard switch group 7.
1~? The comparison circuit 9 compares the signal from N and the signal from the contact pre-voltage contacting the surface of the printed code signal generation disk, and the signal is stopped at the position where both signals match, and the solenoid coil drive circuit 1G causes the solenoid to stop. Coil 11. is driven, the pressing mechanism 11 presses the type λ from the back side, and the carbon ribbon I
Type paper IS wrapped around platen 1 via L,
printed on top.

The end edge of the solenoid coil drive circuit output signal is transferred by the space feed drive circuit 21 to the space feed motor 111 housed in a recess on the platen it end face (left). The feed screw shaft 111. is driven through a gear mechanism 17°. Let it rotate.

Fixed female screw 19. Move platen 1 in the axial direction relative to the platen.

The moving feed amount is determined by the gear mechanism 17. A signal from a space dispersion setting contact 2G provided in a part of the drive circuit 22. The feed amount is controlled by the amount of feedback signal pulses and a variable setting constant.

Fixing screw 19. are upper 11A and lower 19. It consists of a permanent magnet divided into two parts B and magnetized so as to mutually attract each other, and the handle 19.B holds the feed shaft IL from above and below. When you turn C, 19. The polarity of A is reversed, 19. A and 19.
8 repel each other, the feed shaft becomes free, and the platen can move freely.

The signal of the space key switch 214 is applied to the space feed drive circuit 2L, and the platen it is connected to the motor 16.
O platen 14 moves by a predetermined amount due to While it is possible to move, press the margin adjustment lever i.
t (terminal)25. (Start of hitting) is regulated. When the printing is progressing and the printing is nearing the end, the lever 24 will be pressed. The other end switch operating piece is a normally open contact 26. Close the sound generator 27. Issue a pre-alarm. When reaching the end, the normally closed contact 2L is opened and the space feed motor 16. stops.

Hitting start position key switch 29. When you press .

Reverse drive circuit 30. is activated and motor 16. Add a power supply for reversing to the platen 14. move to the left.

Lever 25. Other end switch operating piece 25. is normally closed contact 3
1. When the circuit is opened, the motor stops.

Reverse drive circuit 30. Also opens. Manual stop switch 3'
L is connected in series to contact 3L.

The feeding mechanism with paper is a platen! 4. Place the internal gear 3L attached to the other end of the platen 14. Inner paper feeding motor 34. is driven by the gear mechanism 3L.

To advance the line, press the line advance key switch 3 turtle.

Line feed motor drive circuit 37. starts, one-line feed motor 3 operates, and gear 3L311. When the platen 1 surface rotates, the type paper IL is counted and set on the surface of the gear 31 (the paper feed pulse signal obtained by the D signal pattern ml and the contacts S* and SS facing this is counted and set by the counting circuit 4I). (5) to the motor drive circuit 37. to stop.

41 is a feed amount or count setting switch. When winding the O type paper IS'' around the platen 14, it blocks the gap between the paper introduction contact 42, which also serves as a guide, and the conductive platen 14, so it is used as a signal. The control circuit 43 is activated.

Motor drive circuit 37. motor 34. When the paper 15' is rotated and the paper 15' is fed to the set position, the control circuit 43. counts the paper feed signal and stops it at a predetermined position.

When the trailing edge of the paper passes the contact point 4L, it contacts the platen again, and in response to that signal, the control circuit 43 activates the sounding cable 44 for paper end pre-alarm.

The printing carbon ribbon IL is connected to a ribbon reel 45 and a ribbon winding remoter 46. Drive mechanism 47. It is wound up through. Ribbon winding motor 46. When winding is completed on one reel, the reversal switch 50. The reel on the opposite side operates (6).

Keyboard switch 7.1~ for normal printing? , N is used, but by switching the switch 48, the external terminal 4
9. It can be activated by external signals.

As described above, the present invention enables mass production of an electric typewriter that is small, lightweight, and simple in structure, using a distributed power drive electronic control system using comb-shaped cylindrical type and several small motors.

[Brief explanation of drawings]

1 and 2 are diagrams of a printing mechanism using comb-shaped cylindrical type and a platen feeding mechanism. FIG. 3 is a block diagram of a line feeding mechanism and an electronic circuit. Handle * $ Remnant Rib Y8111 Kiyoshi Kiyoshi (7)

Claims (1)

[Scope of Claims] 1. A typewriter in which the type is printed on the outer periphery of the tip of a comb-shaped cylinder by pressing it from the back side of the type. 2. The type is printed on the outer periphery of the tip of the comb-shaped cylinder by inputting the characters to be printed using a keyboard switch or external input. A typewriter that prints with a stamping device from the back of the type selected by the signal of the code switch and the signal of the code switch that rotates in synchronization with the comb-shaped circumference.
3. A typewriter according to claim 2, in which the rotation of the comb-shaped cylinder, the 5-line transfer of the platen, and the ribbon winding are each driven in a distributed manner by small motors and electrically controlled. 4. A paper detection element in the paper insertion slot of the platen. A typewriter according to claim 3, which has the functions of automatic paper feeding, print position cueing, and paper end prediction by providing a