JPS59178073A - Device for scanning and recording picture - Google Patents

Abstract

PURPOSE:To prevent phase shift by providing a couple of slits at an interval larger than a main scanning recording width and providing an approach section between a start point and a last point of the main scanning recording from a slit detecting point. CONSTITUTION:A picture reciprocating recorder provided with a recording head 4 and a scanning unit 3 scans and records a picture by scanning reciprocating the recording head in the broadwise direction of a recording paper sheet 1. Then, a couple of slits 9a, 9b having a larger interval than the scanning recording width are provided to a code plate 8 opposite to a slit detection section 6 for positioning recording head provided to the scanning unit 3. Further, a trigger generator receiving a slit detecting signal from the slit detecting section and generating a trigger signal, an approach counter receiving the trigger signal and performing count of a prescribed value for the head approach section at the main scanning region, a recoring counter counting of the scanning recording region and a recording and driving circuit are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to (1) an image reciprocating scanning recording device, and in particular, when the recording head is in contact with all of the recording paper, the recording head moves in the width direction of all of the recording paper; By reciprocating scanning (main scanning) and conveying the recording paper in a direction substantially perpendicular to the scanning direction of the recording head (sub-scanning), the image can be scanned in the forward scanning and backward scanning of the recording paper head. The present invention relates to a device that prevents a recording position shift between a recording end point on an outbound trip and a recording start point on a return trip in a recording device.

(2) Background of the technology Here, an image reciprocating scanning recording device is a device that scans characters, symbols, drawings, photographs, etc. and converts the images into continuous electrical signals by thermal recording or electrostatic recording. A device that reproduces information on recording paper via a recording head.

This type of device uses electrical signals as a recording medium for recorded images, so it has the advantage of being able to send images to remote locations. Due to this advantage, this type of device
It is often used as a recording device for facsimile machines. As a recent trend, this type of recording device also has high speed,
There is a strong demand for clear reproduced images, and this tendency is particularly strong for reproduction records of drawings and photographs. In order to perform high-speed recording, it is first necessary for the recording head to record on both the forward and backward paths, and in order to obtain sharp and clear reproduced images, it is especially important to , it is necessary to eliminate or minimize the deviation of one or two places in the backward scan recording start point.

Further, since the fence recording device accounts for a large proportion of the price of the entire facsimile device, it is desirable to have one that is as low in price as possible.

(3) Prior Art and Problems Conventional image reciprocating recording devices are mainly designed to perform scanning recording on the forward and backward passes for character recording.
Most of them are designed to scan and print only in one direction (for example, forward scanning). In the former case, the advantage is that the recording speed is excellent, but there is a problem μ in that the recording of drawings, photographs, etc. lacks clarity. In the latter case, since it is only necessary to align the recording start point of the scanning line, there is no problem in terms of sharpness of recording, but there is a problem in that high speed is lacking. Therefore, such conventional equipment is not suitable for facsimile machines and the like that require high-speed transmission of clear drawings, photographs, etc.

(4) Object of the Invention In view of the above-mentioned conventional problems, the object of the present invention is to provide a low-cost image reciprocating scanning recorder that can perform high-speed, clear scanning recording even in the scanning recording of drawings, photographs, etc. All equipment is provided.

(5) Structure of the Invention In order to achieve this object, the present invention includes a scanning unit in which a recording head, a reading section, and an optical sensor for detecting slits are integrally incorporated, and the recording spatula) 4
By making the recording paper reciprocate in the width direction with the recording paper in contact with the recording paper, and by transporting the entire recording paper in the sub-scanning direction that is substantially orthogonal to the main scanning direction of the recording head, the image can be imaged. The device performs scanning recording, and includes a pair of slits facing the optical sensor at an interval larger than the main scanning recording width, and receives a slit detection signal from a slit detection section consisting of the optical sensor to generate a trigger signal. a main scanning trigger generator that transmits a main scanning trigger generator; a main scanning motor counter that receives a main scanning trigger signal from the main scanning trigger generator and counts drive signals for the main scanning motor; a motor drive circuit that receives a signal from a motor counter and sends a drive signal to the main scanning motor; a main scanning motor that is driven by the signal from the motor drive circuit and also drives the scanning unit; A main scanning approach counter in which the main scanning counter receives all signals at one time and performs a run if of the approach section in the main scanning section, and a main scanning recording counter which receives signals from the approach counter and performs a run if of the main scan recording section. and a recording drive circuit that receives a signal from the main scanning recording counter and transmits all the recording signals to the recording head, and sets the count number of the approach section by the main scanning approach counter to a predetermined constant value. As a result, there is provided an image reciprocating scanning recording apparatus characterized in that the positions of the final point of forward main scanning recording and the starting point of backward main scanning recording are prevented from being misaligned.

(6) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail based on the drawings.

1 to 5 are diagrams for explaining the present invention in detail. FIG. 1 is a perspective view schematically showing the main parts of the present invention, FIG. 2 is a side view of the main parts as seen from the direction of arrow C in FIG. 1, and FIG.
The figure shows the operation diagram (a) of the photosensor (optical sensor) 6 in Figure 1, the speed diagram (b) of the cruise motor 12-, and (
FIG. 4 is a block diagram of this embodiment, and FIG. 5 is a time chart of this embodiment. Incidentally, in FIGS. 1 to 5, the same parts or locations are all given the same reference numerals.

In FIGS. 1 and 2, reference numeral 1 indicates recording paper, 2 indicates a plate template, 3 indicates a scanning unit in which a recording head 4, a reading section 5, and a photosensor (optical sensor) 6 are integrated, and 7 indicates a scanning unit. A cylinder wiring board attached to the bottom surface of the reading unit 5;
8 is a code plate, 9a and 9b are slits formed through the flat plate part 8a of the code plate 8, 10 is a screw shaft screwed into the reading part 5, and 11 is a guide slidably fitted into the reading part 5. Axis, 12 is main scanning/Gurusu motor, 1:3 (
is a timing pulley fixed to the drive shaft of the motor 12,
14 is a timing pulley fixed to the shaft 10;
5 is a timing belt engaged with timing pulleys 13 and 14; 16 is a flexible cable connected to the recording pad 4; 17 is a flexible cable connected to the printed wiring board 7; 2
(Fig. 2) and 19 indicate guide rollers (Fig. 2) for the recording paper 1, respectively. Further, symbol A is the operating range of the scanning unit 6 (that is, the operating range of the photosensor 6), B is the recording width, and P
5a indicates a light receiving hole provided in the reading section 5, and reflected light P enters the inside of the reading section 5 from the light receiving hole 5a. incident on .

The ends of the recording paper 1 are connected to the guide roller 9 and the auxiliary roller 1.
? a, then inserted and fed between the plate template 2 and the recording head 4, and further fed to the drive roller 1? and auxiliary roller 1)? It is inserted and fed between a.1. Drive roller 1? is transported in the direction of arrow H (sub-scanning direction) (see Figure 2)
. The recording head 4 (in this case, a thermal head) is swingably supported at its lower end by a support member 5b formed integrally with the reading section via a support shaft 20, and is supported by a pressing spring 21 ( (Fig. 2), the recording paper 1 is placed on the plastic template 2.
is pressed through. Then, for recording, a plurality of recording elements (recording drum) 4a (for example, 8 pieces of 1 piece f, for a total of 64 pieces) are arranged in the vertical direction on the contact surface of the do 4 with the recording paper 1. It is provided.

The photosensor 6 is fixed to the reading section 5, and its tip is divided into upper and lower halves to form a U-shaped cutout space 6a. A light emitting element (not shown) is disposed on one side of this upper and lower divided portion, and a light receiving element (not shown) is disposed on the other side facing each other. The iodine plate 8 has a pair of sulins (9a + 9b) formed through its flat plate part 8a at an interval larger than the recording width B, and this flat plate part 8a is sandwiched in a U-shaped cutout space 6a in a non-contact manner. At the same time, it extends in the main scanning direction (direction of arrow E) of the photosensor 6 and is fixedly disposed. Now, scree shaft 10
is driven in forward and reverse directions via a timing pulley 13, a timing belt 5, and a timing pulley 14 by a pulse motor 12 which is driven in forward and reverse directions by a pulse signal. Corresponding to the forward and reverse rotations of the scree shaft 10, the scanning unit 3 reciprocates in an outward path (in the direction of the arrow) and a backward path (in the direction of the arrow E). Therefore, the photosensor 6 is set to reciprocate within the operating range A1 on the flat plate portion 8a of the code plate 8, that is, between points F and G. When the photosensor 6 reaches the slit 9a or 9b, the optical signal from the light emitting element described above is conducted to the light receiving element, and the optical signal is sent out as an electric signal (ie, a slit detection signal). Based on this slit detection signal, scanning recording is performed as described later.

Now, with reference to FIG. 3, the operations of the photosensor 6 and the lune motor 12 will be explained. In Figure 3, F
The point is the starting point of the outgoing path of the photosensor 6 (FIG. 1) and the ending point of the incoming path, and the point G is the ending point of the outgoing path and the starting point of the outgoing path. That is, these F, G
Both points correspond to turning points of the photosensor 6. Further, in the figure, the symbol v Id, the speed of the pulse motor 12 (FIG. 1), and Vl indicate a predetermined constant speed of the pulse motor 12. (A) In the figure, the photosensor 6 (Figure 1) starts from point F on the outward journey v, pickpockets, )9
When reaching point a at the outer edge of point a, the optical signal conducts as described above, discards the slit detection signal (electrical signal), and continues to correspond to the preset and constant number of Run-up to run-up section L1 and reach point b1. This b1
At this point, a recording signal is transmitted to the recording head 4 (FIG. 1) and forward recording is started. Subsequently, the photosensor 6 starts from point b1, passes through a recording width (recording section) B corresponding to a preset constant /f pulse number, and reaches point C1. is terminated. Continuing further, the photosensor 6 passes from the point 01, passes through the inner edge part d-i of the slot 9b, and stops at the outer edge part e.

The number of pulses corresponding to the section L2 from point C1 to eA is set to be the same as the number of P pulses corresponding to the run-up section L1 from point a to point b1 described above. Further, the slit 9b is detected at the photosensor 6fdd point, but this detection signal is not used on the outward path. Then, the sensor 6 continues to move from point e to point G and is stopped. This point G becomes the turning point, and the photo sensor 6
-This time, we will start our return trip using this GA as the starting point. Incidentally, during this turning, the recording paper 1 (FIG. 2) is conveyed by a predetermined amount in the sub-scanning direction (arrow H in FIG. 2). Now, the outward movement of the photosensor 6 is performed in substantially the same way as the above-mentioned outward movement. That is, on the return trip, when starting from point G and reaching point e, a slit detection signal is transmitted, and this time, the section L2 corresponding to a preset arbitrary number of ruses becomes the approach section of the return trip, and this approach After passing the section L2, the point 02 is reached. At this point C2, a recording signal is transmitted to the recording head 4 (FIG. 1), and the backward recording is started. The number of pulses from point e to point 02 (L2 section) on this return trip is the number of pulses from point 01 to point e (L2 section) on the outward trip.
It is set to be the same as the number of 7 russ up to (section). Therefore, point 02, which is the recording start point of the outbound trip, is the final point of the outbound trip, in relation to the speed (FIGS. It matches the 01 point. Now, the photosensor continues from point C2,
As in the case of the outward path, after passing the recording width (recording section) B corresponding to the preset number of pulses, the point b2 is reached, and this point b
Recording of the return trip ends with 2 points.

Therefore, point b2, which is the last recording point on this return trip, coincides with point s, which is the recording start point on the outward trip. Continuing further,
The photosensor 6 passes through the entire inner edge part f of the slint 9a from point b2 and reaches the outer edge part a point. The number of pulses corresponding to the section L1 from point b2 to point a is from point a on the outward journey.

It is set to be the same as the number of russ in the point trench. However, the photosensor 6 detects 9ak at point f, but this detection coefficient (is not used on the flyway). Nutnov is 0. This F point becomes the turning point,
The photosensor 6 again starts its outward journey from this point F. At this time, the recording paper 1 (Fig. 2) is conveyed by a predetermined amount in the sub-scanning direction (Fig. 2, arrow I ()).
Figure 3 (B) is a speed diagram of the pulse motor 12 (Figure 1) corresponding to the outward movement of the photosensor 6 in Figure Q (A). (b) In the figure, the rotational speed v of the pulse motor 12 starts from O at point F, and at point A, it enters the run-up section L1 in an accelerated state, and the acceleration is completed within this run-up section Ll. After reaching a constant speed v1, the vehicle enters point b1, which is the recording start point of the above-mentioned outward path.

In this case, since the recording signal is transmitted in response to the pulse signal to the pulse motor 12, the pulse motor 12
Since the speed V of the motor 12 is unstable during acceleration, good recording results cannot be obtained if recording is started in such an acceleration section. Therefore, as mentioned above,
Good recording results can be obtained by setting the run-up period and starting recording after the speed V of the pulse motor 12 has stabilized at a predetermined constant speed vl. Continuing, the pulse motor 12 passes through the recording section B at a constant speed v1 and a predetermined number of pulses, reaches the final recording point CI on the outward path, further passes through point e at a constant speed v1, and is stopped at point G. The speed V becomes 0. The velocity diagram in the vicinity of the G point rapidly descends to O at the G point, as shown in Figure (b).

Now, the speed diagram of the pulse motor 12 on the return path is shown in the third diagram.
As shown in Figure Ci. As can be easily seen from the Ci diagram, the speed diagram 0(a) for this return trip has the same shape as the speed diagram (b) for the aforementioned outbound trip in the left-right opposite direction. Therefore,
The pulse motor 12 operates on the return trip in the same manner as in the outward trip shown in FIG. In other words, (-'l [il:
・The rotational speed 7 of the Mars motor 12 is O at point G.
After starting the return trip from , at point e, the vehicle enters the run-up section [9+L2] while still in an accelerating state, and after completing the acceleration within this run-up section L2 and reaching a constant speed v1, it reaches point C2, which is the starting point for recording the return trip. enter. As described above, since the recording of the return trip starts at point 02 after stabilizing at a constant speed Vl, the recording start point C2 of this return trip coincides with the recording final point C1 of the outward trip, and positional deviation with respect to point 01 is prevented. Ru. Continuing, Tarsu e-Yu 12 passes the recording width B at a constant speed v1 and a predetermined number of russes, and reaches the recording final point b on the return trip.
2, and further passes through point a at a constant speed v1, and near point F, the speed V suddenly decreases and stops at point F, where the speed V becomes 0. Then, the gusset motor 12 again starts its outward journey from point F with the speed V at O, and operates in the same manner as the forward journey described above. Then, this outward journey recording starting point b
1 is the final point b of the return trip for the same reason as the return trip.
2, positional deviation with respect to point b2 is prevented.

Next, FIG. 4 will be explained. In FIG. 4, a slit detection signal (open air signal) Sl from a slit detection unit (photo sensor) 6 is sent to a main scanning trigger generator (generation circuit) 22 and a sub-scanning trigger generator (generation circuit) 30. Ru. The main scanning trigger signal S1 is received by the main scanning trigger signal S2, and the main scanning trigger signal S2 is simultaneously transmitted to the main scanning motor counter 23 and the main scanning approach counter 26.

Upon receiving this signal S2, the main scanning motor counter 23
starts counting the number of pulses in the main scan (corresponding to the period a to e in FIG. 2, that is, (B+L1 +L2)), and sends this count signal S3 to the motor drive circuit 24. The motor drive circuit 24 receives this signal S3 and transmits a drive signal S4 to the main scanning motor 12 (see FIG. 1). The motor 12 is controlled and driven by this signal S4. On the other hand, the main scanning approach counter 26 which has received the main scanning trigger signal S2 corresponds to the main scanning approach period (corresponding to Ll and L2 in FIG. 3). After counting the number of pulses, a run-up count end signal S5 is sent to the main scanning recording counter 27. Main scanning record counter 26
receives this signal S5, starts counting the number of pulses corresponding to the main scanning recording section (corresponding to BK in Fig. 3), and continues recording count signal S6 until the counting of this number of pulses is completed. is transmitted to the recording drive circuit 28. The recording drive circuit 28 receives this signal S6 and outputs the recording drive signal S.
7 is sent to the recording head 4, and the recording head 4 signal S is sent to the recording head 4.
Main scanning recording is performed based on 7. Now, the 10-point eclipse trigger generator (generating circuit) 30 that receives the slit detection signal Sl is activated at the time of return during the back and forth movement of the photo 6 as explained in FIG. 3 above. F''-a and between 0 and 0), a sub-scanning trigger signal S8 is transmitted to the sub-scanning motor and drive circuit 31.The sub-scanning motor drive circuit 31 receives this signal S8. The drive signal S9 is received and sent to the sub-running food motor 32. Motor 3
2 (not shown in FIG. 2) drives the 1 drive roller 18 shown in FIG. to transport only the required amount. In addition, the above code 22.23+24.26.2
7, 28, 30, 31 and 32 are mounted on the printed wiring board 7 shown in FIG.
And each signal is sent and received 5 via flexible cables 16, 17.

As mentioned above, FIG. 5 is a time chart of this example. In the same figure, the symbol Sl, S2+S4+85
+86 +SB +89 indicates each signal explained in FIG. 4 above, and Q indicates a pulse signal. In the figure, the pulse signals between F and a and between e and G of the signal S4 are omitted to simplify the drawing. Moreover, this FIG. 5 is shown correspondingly to the above-mentioned FIG. 3 as well. The transmission or reception status of each signal shown in the figure is shown in the fourth section.
Since it is the same as the explanation in the figure, the explanation will be omitted here. As can be easily seen by observing FIG. 5, run-up sections Ll and L2 are set in the forward and backward passes of the main scan, respectively, and the number of pulse signals Q corresponding to these sections is set in advance to a predetermined constant number. As a result, the recording final point c1 on the outward path and the recording start point c2 on the backward path coincide. Incidentally, the recording final point bz (not shown in FIG. 5, see FIG. 3) on the return trip and the recording start point b1 on the outbound trip similarly coincide. Therefore, according to this embodiment, when reproducing and recording figures, photographs, etc., -C also
Misalignment of a single recording element (see reference numeral 4a in FIG. 1) can be prevented, and reproduction and recording of good image quality is possible.

(7) Effects of the Invention As explained in detail above, the image carrier forward and backward scanning recording device of the present invention provides a pair of slits at an interval larger than the main scanning recording width, and performs main scanning recording from these slit detection points. By providing a run-up section corresponding to a predetermined number of pulses between the start point and the final point, it is possible to record images at high speed and with extremely good quality even when playing back and recording drawings, photographs, etc. It has a great effect of being able to be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing the main parts of an embodiment of the present invention;
FIG. 2 is a side view of the main parts as seen from the direction of arrow C in FIG. FIG. 4 is a block diagram of a non-embodiment, and FIG. 5 is a time chart of each signal in this embodiment. 1... Recording paper, 2... Pla template, 3...
Scanning unit, 4... Recording head, 4a... Recording element (d1@dot), 5... Reading section, 6... Photo sensor (optical character sensor; slit detection section), 7... Print Wiring board, 8... Code board, 9ay9b... Pair of slits, 12... Main scanning no.9 motor, 18
. . . Recording pulse 4-motion roller, 22 . . . Main scanning trigger generator (generation circuit), 23 . . . Main scanning motor counter, 24 . . . Motor Jψ. Dynamic circuit, 26... Main scanning run-up counter, 27...
Main scanning record counter, 28...Record, also function circuit, 3
0... Sub-scanning trigger generator, 31... Sub-scanning motor, '5λ motion circuit. Patent Attorney: Fujitsu Limited Patent Dejima Representative Patent Attorney Akira Kenki Patent Attorney Sada Nishidate Patent Attorney 1) Yukio Patent Attorney Akira Yamaguchi

Claims (1)

[Claims] 1. To record, C, and to, G9): Equipped with a sophisticated scanning unit incorporating a g-determining slit detection section, and by scanning the recording head back and forth in the width direction of the recording paper, the image can be detected. A device for scanning recording, which is provided with a pair of slits facing the slit detection section at an interval larger than the width of the scanning record, and receives a slit detection signal from the slit detection section to generate a trigger signal. a trigger generator that transmits a signal; an approach counter that receives the trigger signal and performs a constant value count i for a head approach section in the main scanning area; a recording counter that performs a count tf of a scanning recording area; and a signal from the recording counter. An image scanning recording apparatus comprising: a recording drive circuit that receives a recording signal and transmits a recording signal to the recording head.