JPS5952680A - Serial printer - Google Patents

Abstract

PURPOSE:To enable graphic printing, by using a paper feed cam having two or more of paper feed grooves and a paper feed pitch change-over groove for changing over the paper feed grooves to make the paper feed pitch changeable. CONSTITUTION:A head feed cam 6 is rotated to a direction K by the rotation of a motor 7 and a carriage 3 is moved by a carriage pin 103 meshed with the grooves of head feed cam 6. On the other hand, a paper feed groove 5-a is provided to a paper feed cam 5 to be meshed with a paper feed pin 104 and rotary force is transmitted to the paper feed cam 5 with the movement of the carriage 3. As the paper feed groove 5-a, the groove 5-a-1 for a text mode and the groove 5-a-4 for a graphic mode are provided and the change-over of both grooves are carried out according to positions when the carriage is moved to a direction A and returned toward a direction B. When the carriage is returned toward the direction B, paper feed gears 10, 11 are meshed to rotate a paper feed shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a serial dot matrix printer that moves a head in the digit direction to form characters, symbols, etc. using a dot matrix.

Conventionally, in dot matrix printers, it was necessary to feed the paper after the printing process was completed.
A head feeding mechanism using a helical cam having a reciprocating stroke as described in Japanese Patent No. 6528, and US Pat. No. 425
A cycle machine type printer such as that described in the specification of No. 0808 has been used to reduce the size and cost of the printer. In addition, some serial dot matrix printers use a step motor, plunger, etc. as a dedicated drive source for paper feed, in addition to head feed, to make the paper feed variable variable and enable graphic printing. .

However, since cycle machines always perform operations equivalent to printing the maximum allowable number of print digits, it is difficult to increase the practical printing speed, and it is difficult to increase the printing speed for practical use. The drawback was that it couldn't be done. Furthermore, it is difficult to downsize and reduce the price of a device that uses a step motor or plunger exclusively as a drive source for paper feeding! It was IU.

The present invention eliminates such drawbacks, and its purpose is to:
The first objective is to provide a printer that has a variable paper feed pitch and is capable of printing graphics. The second objective is to provide a printer that can perform practical printing quickly. To provide a printer capable of rapidly feeding paper through a jet 6. The fourth objective is to provide a printer with a simple mechanism, small size, and low price.

Examples of the present invention will be described below. Figure 1 is a perspective view showing the structure of the printer, Figure 2 (σ) is a detailed perspective view of the vicinity of the carriage of the printer in Figure 1, Figure 2 (b) is a side cross-sectional view of Figure (a), and Figure 3 Figure (σ) is a schematic top view of the printer frame, Figure 3 (b) ICC) is a diagram showing the state of the helad release, Figure 4 is a cam diagram of the paper feed cam, and Figure 5 is a diagram of the printer of the present invention. The timing chart of text mode printing and graphic mode printing, and Fig. 6 is a diagram showing each paper feed shift. In Fig. 1, 1 is the frame, 2 is the recording paper, and the platen 1
I am facing 9. 3 is a carriage, and 4 is a thermal head. Further, numeral 5 has a paper feeding groove lead 5-α.

As shown in FIG. 4, the groove 5-α has a paper feed groove 5-α-1 for text mode paper feed, a paper feed groove 5-α-2 for graphic mode paper feed, and a text mode paper feed groove 5-α-2. A pitch switching groove 5-σ-3 for switching the paper feeding pitch from to graphic mode, and a feeding groove 5-σ for graphic mode.
There is a connecting groove 5-a-4 that connects α-2 and text mode feed groove 5-σ-1. Reference numeral 6 denotes a head feeding cam that moves the head left and right, and has a groove lead 6-α. 5.6
Both are rotatably supported by the frame 1. 7 is a motor fixed to the frame 1, and 8 is a flexible printed circuit board (8) that is electrically connected to the head 4.
(hereinafter referred to as FPC). Reference numeral 9 denotes a paper feed drive gear fixed coaxially with the paper feed cam 5. Reference numeral 15 denotes a paper feed roller shaft, on which a paper feed roller for feeding the recording paper 2 is fixed. Further, the paper feed white 2 shaft 15 has a paper feed gear 109, a paper feed pawl 11, a paper feed spring 12, etc. on the outside of the frame 1. Spring seat 13. are installed in this order,
Finally, E engages with the groove 15-0 provided on the shaft 15.
It is sealed by a mold retaining ring 14. Paper feed gear 101
d', ... Gear part 1O- (Z, claw part 10-h, hole 10- drilled so as to be able to freely rotate on the cylindrical part 15-α of the paper feed roller shaft) arranged in an M shape. It has C.

The paper feed claw 11 has a claw portion 11-α that engages with the claw portion 10-b.
, a D-shaped hole 11-h attached to the D-cut portion 15-h on the shaft 15 and provided so as to be able to rotate integrally with the shaft 15, and a mounting groove 11 for the paper feed plate 12. -C exists. 16 and 17 are reset pulse detection terminals,
The terminal 46 can detect the position 1M' of the carriage 3 and move. 101 in Fig. 2 is a heat dissipation plate to which the thermal head 4 is fixed. It is rotatably supported in the hole 3-α by the cylindrical portion 101-b of the lower portion 111. Heat sink 101
There is a protrusion 101-(L) on the top of the head spring 102.
It rotatably supports the central portion 102-C of. Further, a projection 101 -C is provided at the bottom of the heat sink 101 and projects behind the carriage 3 from a notch 3 - b provided at the bottom of the back surface of the carriage 3 . 102 is a spring for pressing the head 4 against the recording paper 2;
It is rotatably fixed to the carriage 3 at 02-α,
Push the heat sink 101 at the center part 1-02-C. 1o2-b
is the coil part. 103 is fixed to the carriage 3,
This is a carriage bin that meshes with a groove 6-a provided in the head feeder, and receives driving force from the head feeder to move the carriage 3 left and right. Here, the driving force for head feeding and the cam 6 is a rotational force transmitted from the motor 7 through a wheel train or the like. Reference numeral 104 denotes a paper feed pin, which is attached to the carriage 3 and is pushed in the direction of arrow C by a paper feed pin spring 105 also attached to the carriage, and is pushed to the bottom of the groove 5 -α on the paper feed cam 5. Being forced. The paper feed cam 5 also serves as a guide shaft for the carriage 3. The carriage 3 is moved by the paper feed cam 57 and the wall 1-σ provided on the frame 1.
Isu: It will be decided. Reference numeral 18 denotes a head release lever for releasing the head 4 from the platen 19 during paper feeding, and normally receives a rotational force in the direction of arrow G from a coil spring 106.
It is stopped with b as the eaves. In this embodiment, a 40-digit printer is used, and the head relief lever 18 is installed on the frame near the 10th digit. As shown in Fig. 3, there are protrusions 1-d on the inside of the frame 1 near both side walls.
,, 1-e, 1-/.

In FIG. 2, 3-c is a protrusion provided on the carriage 3, which is where the head and the heat sink 101 come into contact when the head 4 escapes in the direction of the arrow y.

FIG. 4 shows the formation of the groove lead 5-α on the paper feed cam 5. Each point A to W indicates the center point of the lead. d□, d, is the lead 5- of the paper feed Shikam 5
represents the groove depth of a and θ1. θ2 and θ3 are paper feed Shicam 5
It represents the phase angle of each point when referenced to point A above. Groove 5
-α is the paper feed groove 5 in text mode as mentioned above.
σ-1 and graphic mode paper feed groove 5-α-29 paper feed pitch switching groove 5-α-3. Communication groove 5-a-4
There is.

In FIG. 5, 201 is the rotation direction of the motor 7, 202
203 is the state of the reset signal, 203 is printing (head energized state), and 204 is the movement of the carriage in the digit direction. 20
5 represents the state in which the head is pressed against the recording paper 2, 206 represents the rotation angle (phase angle) of the paper feed cam, and 207 represents the paper feed operation. Further, Figure V in m5(a') shows the operation in the text mode, and Figure 5(b) shows the operation in the graphic mode. The two-dot chain line in the paper feed cam operation in the figure is
It shows the operation of the paper feed cam when transitioning from the graphic mode to the text mode and from the text mode to the graphic mode.

In FIG. 6, 4-α indicates the position of the resistor attached to the head 4 on the recording paper 2.

In this embodiment, the head 4 is assumed to have eight resistors.

1) Text mode 1-1) Standby position (To*Ty) The standby position (To*Ty) is the state indicated by To or T in FIG. 5(α). The kittridge 3 presses the li1'X end 16 of the movable terminal 16 of the one-noset detector in the direction of the metal 6 stamping direction so as to break the conduction between the movable terminal 16 and the fixed terminal 17. At this time, the paper feed pin 104 is engaged with the lead 5-'a so that its center is at the point A of the paper feed cam 5 at 8f) 4I3;I. The tip of the heat sink 1'0l- (2 is the frame, the protrusion 1-d of the frame 1,
It is located between 1-e. (Figure 6) At this time,
The heat sink 101 receives a force from the head spring 102 in the direction of the arrow E, and is about to rotate in the direction of the arrow E around the cylindrical portion 101-b. Therefore, protrusion 101-1:・ is arrow E
It is trying to rotate in the ' direction. Therefore, the protrusion 101-e
will try to rotate in the direction of arrow E'.

However, since there is a protrusion 1-e on the frame, the protrusion 101-
The movement of c in the direction of arrow E' is restricted so that the head 4 does not press against the recording paper 2.

1=2) Print preparation (To-Ts) When the motor starts rotating clockwise when viewed from the output shaft direction, the head feed Shicamuro starts rotating in the direction of the arrow (first
figure). The carriage 3 then begins to move in the direction of arrow A. Then, the protrusion 101-C at the lower part of the heat sink moves along the slope of the protrusion 1-s on the frame 1, and at the end of the slope of the protrusion 1-e, the head 4 touches the recording paper 2. will be completely forced into it. When this state is reached, printing preparation is completed.

1-3) Printing state (T1 to T27T3) The carriage 3 moves in the direction of the arrow, and the movable terminal 16 and fixed terminal 17
The printing state starts from the state T1 in which the electrical continuity with the printer is restored. At this time, the paper feed bin 104 is at the position of the outlet of the paper feed cam 5 in FIG. While the carriage 3 moves to the position T2, the paper feed shebbin 104 moves along the path C from the feed groove 5-α-1 of the text mode of the paper feed cam 5, that is, from the opening of the paper cylinder 4 in FIG. . At this time, the paper feed cam 5 rotates by θ in the direction of arrow M. The paper feed drive gear 9 is also integrated with the paper feed cam 5 at 0. Rotate a lot. The paper feed gear 10 meshing with the paper feed drive gear 9 rotates in the direction of arrow P by an amount corresponding to the reduction ratio of the gears 9 and 10. Shigashi,
The paper feed gear 10 is engaged with the pawl 10-6 and the pawl 11-α of the pawl wheel 11, and the pawl 11, which moves integrally with the paper feed roller shaft 15 in the rotational direction, is engaged with the pawl 11-α of the pawl 11-α. Since the direction of engagement between the claw 10-b and the claw 10-b is smooth, the claw 10-b can be rotated without rotation.
along the slope of b, against the force of the paper feed spring 12, move the arrow R.
Move in the direction and escape the bite. Therefore, the rotational force of the paper feed cam 5 is not transmitted to the paper feed roller 1I11015. T
Immediately after passing through , the protrusion 101- at the bottom of the heat sink 101
C hits the protrusion 18-a of the head release lever 18. Then, the head relief lever 1arj rotates in the direction of arrow H as the protrusion 101-C moves against the head relief lever spring 106. The protrusion 18-α is the protrusion 101-
C and rotates to the position shown by the two-dot chain line in FIG. 3(b). When the protrusion 101-C passes the position 6 indicated by the two-dot chain line in FIG. 5(b), the head release lever 1
8 is rotated in the direction of arrow G by the force of the spring 106 and returns to the position where its movement is regulated by the light beam 1-b. This state is T4'. The state in which predetermined printing has been completed is T3.

1-4) Return/paper feed ('rs~T4~T, ~T6~
T)) At T3, the motor starts to reverse. In this state, the paper feed pin 104 is located between points C and H on the paper feed cam 5 in FIG. Along with this, the head feed cam 6 begins to rotate in the direction of the arrow B, and the carriage 3 begins to return in the direction of the arrow B. At this time, the protrusion 101-c at the bottom of the heat sink 101
moves along a trajectory like the arrow S in FIG. 3(C). In other words, when the protrusion 101-C reaches the position where it abuts against the head release lever 18, the head release lever 18 is prevented from rotating in the direction of arrow G by the light 1-h, so that the protrusion 101-C hits the slope of the protrusion 18-α. I will move on accordingly. At this time, the protrusion 101-c moves around the cylindrical portion 1o1-b in the direction of arrow F' in FIG. This causes the head 4 to rotate in the direction of arrow F. Accordingly, in FIG. 2(b), the central portion 102-c of the head spring 102 also rotates in the direction of arrow U, centering on the portion 102-a for reaching the carriage 3. Central part 102-Cat; Attachment is done along an imaginary line α connecting the center of the part 102-α and the center of the rotation center 101-b of the heat sink 101.
When the head spring 1, which had been working in the direction of arrow S,
The spring force 02 changes direction in the direction of arrow T. Then,
, -\ Rad spring 102 rotates at the position indicated by the two-dot chain line at ■゛4 o'clock: Y. At the same time, the heat sink 101. head 4
is also rotated to the position indicated by the two-dot chain line. Then, it stops using the protrusion 3-C provided on the carriage 3 as a stopper. At this time, since the spring force of the Rad spring 102 is directed in the direction of arrow T, the head 4 is stabilized at the position of two points ttm in FIG. 2(h). In this state, the head 4 is not pressing the recording paper 2. This operation is performed from time T4 to time T11. At time T, the carriage 3 moves to the paper feed shebin 10.
The center of 4 is moved to the position of point C in FIG. During the transition from T4 to T4, the paper feed pin moves the text mode feed grooves 5-Q and -1 from point C to the opening in FIG. As a result, the paper feed cam 5 rotates by 02 in the direction of arrow N. Along with this, the paper feed drive gear 9 also rotates by θ8 in the N direction. The paper feed gear 10 meshing with the paper feed drive gear 9 rotates in the direction of arrow 0 by an amount corresponding to the reduction ratio of the gears 9 to 18. At this time, the pawl 11-α of the paper feed pawl 11 is connected to the paper feed gear 1.
The paper feed claw 11 rotates integrally with the paper feed gear 10 because the claws 11 and 10 engage with each other on their ridged surfaces. As a result, the paper feed roller shaft 15, which moves integrally with the paper feed pawl 11 in the rotational direction, also rotates in the direction of arrow 0 by the same amount as the paper feed gear. By a paper feed roller that moves integrally with the paper feed roller shaft 15. The recording paper 2 is fed only at the necessary pitch for the text mode. For example, as shown in FIG. 6, the signal is sent by 12 dot pitches of the head resistor 4-/Z. In this case, the space between characters is 5 x 7
If you complete the distance ♂I with dots, there will be 5 dot spaces. When this operation is completed, the state becomes 1.1 at time T6. At this time, the movable terminal 16 is electrically connected to the fixed terminal 17 again. After this, the carriage 3 continues to move in the direction of arrow B.

In the process, the lower protrusion 101-C of the heat sink 101 moves along the slope of the protrusion 1-d of the frame. At this time, the protrusion 101-. C rotates in the direction of arrow E'. Then, the protrusion 1-a stops at the position where it hits. In this way, the time T before printing starts. The same state T is realized.

1-5) When text mode printing is started from a standby state after graphic mode printing The operation in this case is shown by the two-dot chain line in the timing chart of FIG. 5(α).

In the standby state after printing in the graphic mode, the position of the paper feed pin 104 on the paper feed cam 5 is different from the state after printing in the text mode. The paper feed pin 104 is located at the dotted position above the paper feed cam 5 in FIG. Point A is a position rotated by 01 from point A in the direction of the arrow.

When the motor starts rotating clockwise (normal rotation) when viewed from the output shaft, the carriage 3 rotates as described in 1-1) above.
moves in the direction of arrow A. Along with this, the paper feed pin 10
4 moves along the connecting groove 5- (L-4) on the paper feed cam 5, that is, from the dot in FIG. 4. In the state T, the paper feed pin 104 is on the dot. Points 2 and 2 differ only in the depth direction on the paper feed cam 5. Point 2 is deeper than point 2.

Therefore, the point 〇 is located at the bottom of the groove of the lead 5-α of the paper feed cam 5, and the point 〇 is located in the groove space. The paper feed pin 104 is always pushed in the direction of arrow C by the paper feed pin spring 105, and hits the bottom of the groove of the paper feed cam lead 5-α. Therefore, when the carriage 3 moves in the direction of the arrow A from the state of T1, the paper feed shebin 104 cannot pass through the course from the point of the lead 5-α, and the communication groove 5-σ-4 In other words, you will proceed along the course of Wa from point wo. At this time, the paper feed cam 5 moves in the direction of the arrow (θ2-0
Rotate by 1). However, in case of dC in 1-3)
As described in detail, the paper feed rollers do not rotate and therefore paper is not fed. T, subsequent operations are 1-5),
1-4) The same operation as described in detail in ilY' is performed.

2) Graphic mode 2-1) Waiting state, printing quasi-ship, printing state ('l't.

~T11"'-T12~T13) This process operates exactly the same as in the text mode. The timing chart in this case is shown in Figure 5 (h). The two-dot chain line in the figure indicates text mode printing. This shows the subsequent operation of the paper feed cam 5 from the standby state.

2-2) Head release (T13 to T, 4) Continue to rotate the motor clockwise (normal rotation) when viewed from the output shaft side even after printing is completed. Then, the carriage 3 moves to a position where the lower projection 101-C of the heat sink 101 abuts against the projection 1-/ on the frame 1. Nevertheless, when the motor is rotated in the same direction, the carriage 3 moves further in the direction of the arrow, and the projection 101-C moves along the slope of the projection 1-f. At that time, the protrusion 101-C is arrow F
'The head 4 rotates in the direction of the force, and the head 4 rotates in the direction of the arrow r and stabilizes at the position where the recording paper 2 is released. The movement of the head at this time is the same as explained in detail in 1-4). This state is realized at T14. In the process of moving from T13 to T14, the paper feed pin 104 moves over the paper feed shear roller 5 passing through point E in FIG. Point E differs from point G on the cam 5 only in depth. The paper feed pin 104 is connected to the paper feed pin panel 105.
Since it is pressed against the bottom of the lead 5-a of the paper feed cam 5, when it reaches point H, it will be pressed to point T by the action of the nozzle 105. Thereafter, the paper feed pin 104 moves from point to point. Paper feed pin 104
T14 is realized when reaches the point. In this way, in the graphic mode, the carriage 3 must be moved more in the direction of the arrow than in any printing state in the text mode. In this embodiment, a 40-digit printer is used, and in the text mode, the carriage 3 moves by 240 print dots, whereas in the graphic mode, the carriage 3 always moves by 256 print dots. Therefore, in the graphic mode, it is possible to print 256 dots.

2-3) Return 1 paper feed (T14~T15~"16~T1
(d) Reverse the motor when T14 is reached. Then, the head feeding cam 5 starts rotating in the direction of the arrow B, and the carriage 3 starts moving in the direction of the arrow B. Accordingly, the paper feed pin 104 moves from point to point in FIG. 4. Although point t is deeper than point t, after that, the paper feed shear 104 does not move at all, but moves from point t to point t.

In this process, the pitch is changed to 5-(1-3), and the paper feed cam 5 is rotated by (θ, -0,) in the direction of arrow M.

In this case, the paper feed gear 10 rotates in the direction of arrow P;
As explained in detail in -3), the pawl 10 of the paper feed gear 10
-b and the claw 11-6 of the paper feed claw 11 are formed on a smooth slope, so the paper feed roller does not rotate and the recording paper 2 is not fed.

Thereafter, the paper feed pin 104 moves from point to point over the paper feed cam 5 as the carriage 3 moves in the direction of arrow B. During the process in which the paper feed pin 104 moves along the feed groove in the graphic mode from the starting point, the paper feed cam 5 is rotated by (θ3-θ,) in the direction of arrow N. (Corresponding to T□→T,,Ic) Accordingly, the paper feed gear 10 is connected to the paper feed drive wheel 9.
The motor rotates in the direction of arrow 0 by an amount corresponding to the reduction ratio. At this time, as explained in detail in 1-4), since the claws 10-b and 11-b engage with each other on their sharp surfaces, the paper feed claw 11 is also integrated with the paper feed gear 10. rotate in the direction of arrow O. Therefore, the paper feed roller also moves in the direction of arrow 0 (θ3-θm
), and the recording paper 2 is also fed accordingly. If this amount of speed is set aside for 8 dot pitches of the heating elements 4-α of the head 4 as shown in Fig. pJ6, graphic printing becomes possible by arbitrarily heating the 8 heating elements during printing.

At T16, the paper feed pin 104 moves from the point N on the paper feed cam 5 to the point 2 by the action of the paper feed pin spring 105. Thereafter, as the carriage 3 moves in the direction of arrow B, the paper feed bin 10
4 moves from point to point to the cargo area Tl? becomes. The details of this process are the same as described in 1-4).

If you want to print continuously in graphic mode, select T1.
In other words, the operation of the paper feed cam 5 at TIO is 2 points fl
From the state represented by the I line, the above 1-5), 2-2
), 2-3) Repeat the shouting motion.

3) Fast forwarding of paper The printer is operated as described in 1-1), 1-2), and 1-3) to bring it to state T'4. However, at this time, the head 4 is not energized. T/l.

to reverse the motor. Then, as explained in 1-4), the same amount of paper feeding as in the text mode can be performed. At this time, the paper is fed by omitting the process between T/ and T4. Therefore, by repeating these series of operations, rapid paper feeding can be achieved. In this embodiment, a printer with 40 digits is taken up, and since the head release lever is installed near the 10th digit, paper can be rapidly fed by moving the carriage 3 back and forth to the 10th digit.

As is clear from the above description, the present invention has a simple structure that changes the amount of rotation of the paper feed roller according to the reciprocating distance of the carriage, making the paper feed pitch variable, and providing functions for graphic mode printing and text mode printing. It is possible to realize a printer with both functions, and a printer with high practical printing speed can be realized by rotating the motor in forward and reverse directions. Furthermore, rapid paper feeding can be achieved by simply moving the carriage back and forth slightly in the digit direction.

Further, although this embodiment uses a thermal head as the head, it is clear that this can also be realized using an impact type head or an inkjet type head.

[Brief explanation of the drawing]

Fig. 1 is a perspective view for explaining the configuration and operation of the printer according to the present invention, Fig. 2(α) is a perspective view depicting the carriage area in particular in detail in Fig. 1, and Fig. 2(b) 6(α) is a top view of the frame, FIGS. 6(h) and 3(C) are top views for explaining the operation of the head release lever, and FIG. 4 is a paper The cam diagram of the feeding cam, FIG. 5 is the timing chart of the text mode and graphic mode printing process, and FIG. 6 is the 1. FIG. 4 is an explanatory diagram of paper feeding pitch in text mode and graphic mode. Applicant Epson Corporation Agent Patent Attorney Mogami (CI) G (b) (C) Figure 3 (Q) TIOTII Tl2 Tl3TI4
T15 T16 T17 (b) Figure 5 Figure 6 r Continued Capture +1. 'j' II) 'l!J'
+i'l Agency J之 し J＋佼】°1v
IYi'Fli'u'I
Q'! 162761'r;2, f of invention, I? +
, Serial printer 3 Person who performs supplementary work 1 4 Written amendment of attorney's procedure (voluntary) 1. Amend f + i Σ of the patent claim as follows + E n "
Mark 11 Move the head in the left direction 1 perpendicular to the feeding direction of the recording paper.
Move the front IC by one position to face the mark 1111 head.
A serial printer for printing a record fit includes a carriage carrying a front 11 printing head, a carriage 11% means for moving the carriage back and forth arbitrarily, and Movement of the carriage in the left-right direction'a) A paper feed pitch selection means for selecting the paper feed pitch depending on the time, and a paper feed pitch selection means for moving the carriage in the left and right direction. The paper feed pitch selection means is integrally formed with a paper feed cam having a feed pitch switching groove for switching between two or more paper feed and waste paper feed grooves, and the carriage described in 1111. An unreal printer, characterized in that it has a paper feed cam driving means that engages with a paper feed cam and applies a driving force to the paper feed cam.'' 2. Page 85 of the specification, line 8 from the top, ``Fan-shaped ``Gear portion 10-a'' is replaced by ``
"Gear part 10-a" was corrected. 6. In the 16th line of the specification 9, the position of point A, circle j: sea urchin, has been corrected to read, ``The position of point A should be busy.'' 4. From the 9th line to the 1oth line from the top of page 18 of the specification N, the phrase ``Detailed explanation is the same.'' has been changed to ``
The one who explained it in detail is Tsukasa. ” and corrected. 5. Add the following sentence between the 8th and 9th lines from the top of page 22 of the specification. [Also, as a modification of the present invention, the following second sister example can be considered. As shown in FIG. 4, the phase angles θ1 and 03 are set to 36o'-(=0'). This b, "l'λ4 cam diagram 7d s,
m You can make a long change as shown in Figure 7. In this embodiment, the paper feed groove 5-a-2 has no difference in phase angle ζ1 between A and N, as in 21A7. The paper feed groove in this practical example is the most extreme of paper feed grooves. As the carriage moves in the order of 2 → H → H → T → C → S → N → I, the paper U is not fed, so a paper feed cam as shown in Fig. 7 is used to feed the paper by a certain amount. Two presses can be created: a pitch mode (for example, feed pitch in graphic mode) and a mode without paper feed. In this example, the paper feed groove (5-a-2) communicates with another paper feed groove 5-a-1" at the mouth point, so
The communication grooves 5-a and -4 of the ril actual sword example are not necessary. This example is exactly the same as the 1111 real gum example, only the graphic mode of the previous example has been changed to a mode without paper feed. In this real example, the same Since it is possible to print a certain point twice or more, it is possible to print emphatically.Also, even if mW occurs such that the data transfer is slower than the printing speed of the printer while printing one line, it can be printed twice or more. (6: Since it is possible to print a -line, it has the advantage that it is possible to prevent situations such as printing omissions even if it does not have a backup memory for one line.) As an example, we can consider a combination of the first example and the second example.For example, consider a paper feed cam that includes a cam diagram as shown in FIG. This embodiment is the same as the first sister example of Q and j from I to Wa, and H' to N' are added as the mode without paper feeding in the second sister example. is added. Therefore, if the carriage returns after moving to the range from Ha to Ho, the paper feed in text mode and returning after moving to the range from Ho to t1LII'''c are , the paper is fed in the graphic mode f-, and if the return is made by moving within the range from to to', the paper is not fed.In this way, in this fifth example, the number of carriage movements is controlled. You can freely select three types of paper feed modes by just doing this. t f, a system in which the two-stage groove is changed to a force groove can be considered.This actual! By your suggestion, send paper @5-a-
IV koiqi, ro~ha'to, 口'~ha 2
In this example, the phase angle θ2 is the Tegis i-mode (12
Paper can be fed by a dot. The phase angle θ2 is quantified by 1), and the phase angle θ2 allows paper feeding in the graphic mode (8 dots) σ]. J: It is determined that the sea urchin. Next, in this embodiment, how to switch between the text mode and the graphic mode will be described. About text mode 11.
As previously mentioned fc 5 embodiments and 1 master, move the carriage to position i1! All you have to do is make him work $1 and return him to his home position of 7. About the graphics mode (l, first of all, ;l
20) Execute the no-paper-feed mode as Pwinter described in the ξ example. In other words, move the carriage to
and then return to the home position. After that, move the carriage from H' to 'Open' [,
After that, let him return to his home position. At this time, the paper feed cam V rotates in the direction of arrow N by a phase angle θ'2. Since this rotation is determined to provide paper feed in the graphic mode (8 dots), this operation realizes the paper feed in the graphic mode. However, in this example, the head release lever 18 mentioned in the first example and the attached 1
A drill groove part is required at the position of C' to mouth'. As described above, in the fourth real sister example as well as in the sixth real sister example, five types of paper feeding modes can be freely selected by simply controlling the carriage movement S S: *. 6. In the section for a brief explanation of the drawings, in the 11th line from the top, after ``is.'', it says ``Figure 7 is a second embodiment of the cam diagram of the paper feed cam, and Figure 8 is the cam diagram. The fifth embodiment of the cam diagram is shown in FIG. 9, and the fourth embodiment of the cam diagram is added in FIG. Z Figure 1 has been corrected as shown in the attached sheet. 8 ψ, Figure 4 has been revised as attached →, +En9, :p,
Figures 7 and 8.9 are added as attached. Representative above

Claims (1)

[Claims] In a serial printer that moves the print head in the left and right direction perpendicular to the direction of insufficient recording paper and prints on the recording paper facing the print head, the carriage that carries the print head and the carriage are reciprocated to the left and right at an arbitrary Ml. A carriage driving means for moving the carriage in the left and right direction!
+i11 amount to select the paper feed pitch, and the paper feed pitch selector selects the paper feed pitch by the paper feed pitch.
It consists of a paper feeding means for feeding the paper by Ni1J, and
1 The paper feed pitch selection means is integrally formed with the carriage and a paper feed cam having two or more paper feed grooves and a paper feed 9 pitch switching groove for switching between the paper feed grooves, and the paper feed cam. A serial printer comprising: a paper feed cam driving means that engages with the paper feed cam and applies a driving force to the paper feed cam.