JPS59196282A - Electronic typewriter - Google Patents

Abstract

PURPOSE:To make it possible to accurately determine each setting position, by displaying the position of each position setting member by the distance of a reference position calculated by subtracting the half value of the width counter of the setting member from the value of a carriage position counter. CONSTITUTION:A carriage 11 is moved by a step motor 12 subjected to driving control by the pulse signal (a) from a control apparatus 16 comprising a microcomputer and the position thereof is counted by the carriage position counter mounted in said carriage 11. On the other hand, an optical position detecting sensor 14 provided to the carriage 11 detects the passage of position setting members 5a-5d respectively different in width according to position setting functions and the pulse signal (a) in the output of the detected signal (b) thereof is counted by a width counter and the half value thereof is subtracted from the value of the position counter to make it possible to calculate each central position of the setting members 5a-5d as the distance from a reference position. By this mechanism, each setting position can be automatically detected more accurately.

Description

[Detailed description of the invention] [Technical field of invention] This invention relates to improvements in electronic typewriters.

[Technical background of the invention and its problems]

Generally, in typewriters, left and right margin positions and tab positions for controlling carriage movement can be set arbitrarily to accommodate various paper sizes or print formats. This also applies to electronic typewriters with a built-in text memory.

Conventionally, in electronic typewriters, the carriage is moved to the position where margins and tabs should be set using a ski, etc., and the margins are stored in the internal memory by manually pressing the margin set key or tab set key at that position. It was to store the position and tab position as information.

However, with this one, the mernon position and tab position could not be directly discerned from the outside, and the carriage had to be moved to find out the position.

In order to avoid these problems, position setting members such as left and right margin positions, tab positions, carriage small position, bell position, etc. are provided movably in the direction of movement of the carriage. A position detection sensor is installed to detect the passage of the carriage relative to each position setting member, and when the power is turned on, the movement of the carriage horn is controlled and the margin position, tab position, etc. are detected from the output signal of the position detection sensor at that time. An electronic tie lighter has been proposed in which the movement of the carrying horn is controlled based on the stored setting positions.

However, the electronic typewriter constructed in this manner has the following problems.

That is, the position detection sensors provided on the carriage include (1) a sensor that detects a change in the magnetic field due to a Holle element, (2) a sensor that detects a change in inductance of a coil, (3) a sensor that detects light interruption. (4) Although devices that detect changes in capacitance have been proposed,
In either case, the output level of the position detection sensor varies greatly depending on usage conditions and the like. For example, when using an optical sensor, the output level fluctuates considerably depending on temperature, external light, variations in the characteristics of the element itself, assembly precision, etc.

Conventionally, the position of each setting portion has been detected by using a voltage comparator or the like having a certain threshold value at the rising position of the output signal of the position detection sensor. Therefore, if the output level fluctuates, the rise characteristic also fluctuates correspondingly, so that an error corresponding to the output level fluctuation is mixed into the position of each setting member detected by a voltage comparator or the like. As a result, accurate left and right margin positions, tab positions, etc. may not be obtained.

[Purpose of the invention]

The present invention was developed based on the above circumstances, and its purpose is to enable the left and right margin positions and tab positions to be distinguished at a glance from the outside, as well as to provide information on each position setting member. An object of the present invention is to provide an electronic typewriter that can more accurately and automatically grasp the setting position of each position such as a margin position set by a user.

[Summary of the invention]

6. In the electronic typewriter of the present invention, a plurality of position setting members for setting left and right margin positions, tab positions, etc. are arranged in the moving direction of the carriage whose movement is controlled in response to Noyals signals, and the above-mentioned A position detection sensor is installed on the carriage that operates only while the carriage passes each of the position setting members, and the width counter measures the number of pulses of the pulse signal of the carriage only when the sensor is operating. The width of each position setting member is detected by measuring the width of each position setting member. In addition, by measuring the number of pulses of the pulse signal with a carriage position counter, the distance from the reference position of the key at that time is determined.Then, from the carriage position counter value, the width Determine the distance of the center position of each position setting member from the reference position by subtracting half the value of the counter value;
This distance is defined as the set position of the position setting member.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the exterior, and the front surface of the housing 1 is provided with a keyboard 2 for inputting key signals for specifying characters and functions, and a pitch scale 3 for indicating print pitch and carriage position to be described later. A slide groove 4 is formed along this pit scale 3, and position setting portion sides 5a and 5b are used to set the left margin position, tab position, bell position, and right margin position of the carriage, respectively. .

5c and 5d are movably provided. The pitch scale 3 has an indicator 6 for indicating the movement position of the carriage.
is placed so that it can be seen visually. Further, a platen knob 7 is provided on the side surface of the housing 1.

FIG. 2 schematically shows the main components housed in the housing 1. Shafts 8 and 9 are mounted parallel to each other at a predetermined interval in the frame of the housing 1 shown in FIG. It is being constructed. A carriage 11 equipped with a daisy-wheel type print head 10 is attached to this shaft 8.9 so as to be movable in the installation direction of the shaft 8.9.

This carrier zo I is controlled to move at a rate of 1 character step per pulse by a wire 13 which is rotated by a step motor 12 which is rotationally controlled by a pulse signal a, and an optical position is provided on the front surface of the carrier. A detection sensor I4 is attached.

This optical position detection sensor 14 has a light emitting diode and a phototransistor arranged facing each other, and when the carriage 11 is moved, the facing space 15 is connected to each of the position setting members 58 to 5d and the home of the carriage 11. It is set so that each tip of the position setting member 5e for the position passes through. Note that each of these position setting members 5a
The widths 5e to 5e are set to different values depending on the type of position setting member. Then, each of the position setting members 58 to 5 is
When e passes through the opposing space I5 of the position detecting sensor 14, the position detecting sensor 14 operates for only the time it passes, and sends out an output signal S. A pulse signal aX@ that drives and controls the step motor 12
A control device 16 controls the output signals of the position detection sensor 14 and the like.

The control device 16 is provided with a CPU (central processing unit) 17 as shown in FIG.
, keyed controller 23 and I10 port 24
are connected by iN. CPU 17 is ROM
RA based on the program data stored in 21.
M22, keyboard controller 23, I10 port 2
4 respectively. Key? - The card controller 23 controls the keyboard 2 and takes in key signals from the keyboard 2. A motor control circuit 25 for controlling the step motor I2 and an amplifier 26 for receiving an output signal from the position detection sensor 14 are connected to the I10 port 24, respectively.

In addition to the document information inputted from the key bead 2, the RAM 22 stores a carriage position count X1 indicating the position of the carriage 11, a position detection sensor 1,
4 is in operation, a width count W1 indicating the number of Nockles of the pulse signal a, a specified width A1 of the specific position setting member 5e indicating the home position of the carriage 11, an allowable minimum width A1, and an allowable maximum width A2 are stored. There is. Furthermore, the minimum allowable width B1 for the classifications (types) 1 to n of each position setting member 5a to 5d other than the home position position setting member 5e.
1'=Bnl, the allowable maximum width 81□~Bn2 is stored, and the center positions Y1~Yn of the positioning members of each class 1~n detected by the position detection sensor I4 are stored in each class 1.
. . . - n and the set number of position setting members are stored.

FIG. 5 is a flowchart showing the control for turning on the power and setting the Calitsuno II to the home position provided near the left end. The step motor 12 is driven to move the carriage II sufficiently to the right of the position setting member 5e indicating the home position. Note that the moving distance of the carriage 11 corresponds to the number of rotations of the step motor 12, that is, the number of pulses of the transmitted pulse signal a. Next, width count W1 in FtAM22 for each classification 1~
Clear the center position Yl-Yn of n. Next, when a leftward signal a corresponding to one pitch (one character) of the Taigu character is applied to the step motor 12 via the motor control circuit 25, the carrier 11 moves one pitch to the left. do. Then, it is determined whether the output signal of the position detection sensor 14 has changed from a low level to a high level, that is, whether the position detection sensor 14 has detected each position setting member 5a to 5e. , further move the carriage Z1 one pitch to the left. When any of the position setting members 58 to 5e is detected and the output signal changes to a high level, the RAM 220 width count W is counted up by one, and then the carriage 11 is moved to the left by one pitch. Then, the carriage 11 is moved to the left one pitch at a time while counting up the width count W until the output signal changes to low level again. If the data signal changes to low level, the width of the count up is increased)
W is the allowable range width Al''-A2 of the width of the position setting member 5e at the home position stored in advance in the FCAM'22.
Determine whether or not it fits. When W is out of A1-A2, the width count W is cleared to zero, the carriage 1 is moved to the left, and the position detection sensor 14 detects the other position setting members 58 to 5e again. Above width count W
If is within the range of A1-A2, the position detection sensor 14 determines that the position setting member 5e at the home position has been detected, and returns the carriage 11 to the right by the prescribed value @A of the position setting member 5e. As a result, the key? 'J Tsuji 11 will be located at the right end of the position setting member 5e. Then, the carriage 11 is stopped at this position, and the carriage position count X in the RAM 22 is cleared to zero.

Next, when detecting the positions of the position setting members 58 to 5d of other classifications (types) such as the left margin position, tab position, bell position, right margin position, etc. other than the home position, as shown in the flowchart of FIG. Control. That is, in the final stage of the flowchart in FIG. 5, the carriage position count X is set to X=0.
Then, in FIG. 6, the width is set to W=0.

Next, a pulse signal a for one pitch is applied to the left from the CPU 17 to the motor 12, and the carriage 11 is moved one pitch to the right, and at the same time, the carriage position count X in the RAM 22 is counted by 1. rise.

Then, it is determined whether the output signal of the position detection sensor 14 has changed from a low level to a high level, and if the level is low, the carriage position count After confirming this, the carriage 11 is advanced one pitch again. Then, the carriage 11 is sequentially advanced to the right. When the data signal changes to a high level, the width count W is incremented by 1, and then the carriage 11 is advanced one pitch further to the right. Then, the width count W is counted up until the data signal returns to a low level. After the data signal S returns to a low level, it is checked to which category among the categories 1 to n stored in the RAM 22 the current width count W belongs. In other words, the above-mentioned width (curtain) W is within the allowable range B11-~ of classification 1.
It is determined whether or not B12 is entered, and when entering, the value Yl (Yl = X-W/2) obtained by subtracting half of the width count W from the carriage position count X at that time is set as the position setting member 58 to 5d of classification 1. The center position of That is, this center position Y1 indicates the distance expressed in character pitch from the home position as the reference position of the carriage 11. Then, the center position Y1 and the number of classification 1 are commonly stored in the RAM 22, and the process returns to the beginning of the flowchart, moves the carriage 11 further to the right, and searches for the next position setting member. The above-mentioned W is the allowable range of classification 1 811 ''-81
If W does not fall within 2, the next classification 2 tolerance range B21
= 822, and if it falls within this range, calculate the center position Y2 of classification 2 in the same way as classification 1 and store it in RAM 22.
and return to the beginning of the flowchart. If W does not fall into category 2, it is sequentially searched for category 3, . . ., category n, and sorted into one of the categories.

While repeating such operations, the carriage 11 is sequentially moved to the right, and the classification and center position of each positioning part wing 5a to 5d is stored in the RAM 22. After all the position setting members 58 to 5d have been searched and stored, the carriage I
When Z reaches the absolute margin position at the right end, the carriage 11 is returned to the home position near the left end, the carriage position count X is cleared to zero, and a character printing standby state is entered.

In this way, the left and right margin positions, tab positions, bell positions, etc. can be easily set using the setting members 58 to 5d. Furthermore, even after the settings have been made, the position setting members 58 to 5d can easily confirm the setting positions.

Furthermore, in the embodiment, the position of each position setting member 58 to 5d is expressed by its center position and stored in the RAM 22, so even if the output level of the position detection sensor 14 fluctuates sharply, Since the position does not change, it is possible to significantly improve the detection accuracy of each set position.

Furthermore, after first finding the pre-fixed home position position and setting that position as the zero point position of the carriage position (curtain) X indicating the position of the carriage 11, the left and right margin positions, tab positions, etc. are set as the above home position. Since they are expressed in terms of distance from the position, even if the set positions are changed midway through, it is easy to compare them with the set positions before the change, and the operability of the electronic typewriter can be improved.

Furthermore, in this embodiment, the width of each position setting member 5a to 5e, including the home position of the carriage II, is set to a different value for each type (classification).
The type of each position (
Since the classification) and the set position are stored at the same time, there is no need to provide a separate mechanism for determining the type of position information.

FIG. 7 is a schematic circuit diagram of a control device for an electronic typewriter according to another embodiment of the present invention.

That is, when the pulse signal a is applied from the CPU 31 to the step morph 12 via the motor drive circuit 32,
The carriage 11 moves by a pitch corresponding to the pulse signal a. The output signal of the position detection sensor 14 is the comparator 3
3, the signal is converted into a logic signal and is input to the rear wheel sum circuit 34 together with the logic signal B. Therefore, the OR circuit 34 outputs an output only when the position detection sensor 14 is operating, and this output is input to the width counter 35. The count value of width counter 35, ie, width count W, is input to CPU 31 and shift register 36. Further, the width counter 35 is reset by a reset signal C from the CPU 31. Above width count W
is converted to 1/2 by the shift register 36 and then input to the subtracter 37. This subtracter 37 includes a CPU 3
The number of pulses of the pulse signal a is counted up and down using the counter control signal d from 1
An output signal from a carriage position counter 38 that constantly measures the current position of the carriage position counter 38, that is, a carriage position count X is input. This subtracter 37 is (Y=X-7
), and the output signal, that is, the center position Y of the position setting members 511 to 5d, is stored in the storage unit 39 via the CPU 31. Note that this storage unit 39 has CP
The classification (type) of the position setting members 58 to 5d whose width count W was determined in U31 is also stored at the same time.

An electronic tie lighter equipped with a control device configured like this
Even if each position setting member 5 is
Each width W of a to 5d can be measured, and the center position Y of each of the position setting members 58 to 5d can be determined using the carriage position counter 38 and the subtractor 37. Therefore, it is possible to obtain the same effects as in the previous embodiment.

〔Effect of the invention〕

As explained above, according to the present invention, the left and right margin positions, tab positions, bell positions, etc. can be easily confirmed from the outside by position setting members arranged in the moving direction of the carriage, and each position setting member Since the setting position is expressed by its center position, it is possible to provide a πi child typewriter that can more accurately and automatically grasp the setting position of each position such as the margin position set in each position setting gB +A.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an electronic typewriter according to an embodiment of the present invention, FIG. 2 is a schematic diagram of the main parts of the electronic typewriter, and FIG. 3 is a schematic circuit diagram of the electronic typewriter. 4 is a configuration diagram of the storage section of the electronic tie lighter, FIGS. 5 and 6 are flowcharts showing the operation of the electronic tie lighter, and FIG. 7 is an electronic tie lighter according to another embodiment of the present invention. FIG. 2 is a schematic circuit configuration diagram of a writer. 2... Gee board, 511-5e... Position setting member, 10... Print head, 11... Carriage, 12
...Step motor, 14...Position detection sensor, 1
6...Control device, 17.31...CPU, 2. +・
...RAM. 35... Width counter, 36... Shift register,
37...Subtractor, 38...Carriage position counter Applicant's representative Patent attorney Takehiko Suzue a) C

Claims (1)

[Claims] (1) A carriage equipped with a print head whose movement is controlled by a drive motor that responds to pulse signals sent from a control unit, and which are arranged along the direction of movement of this carriage and set the positions of margins, tab positions, etc. a plurality of position setting members having functions; a sensor attached to the carriage to detect each of the position setting members; a width counter for measuring a signal; a carriage position counter for measuring a pulse of the signal and a moving distance of the carriage from a predetermined reference position; and a position setting member of the sensor during a detection operation. means for detecting the position of each position setting member from the value of the carriage position counter, and the position of each position setting member is determined by subtracting half the value of the width counter from the value of the carriage position counter. Electronic typewriter 0 characterized in that the information is expressed in terms of distance from the reference position.