CN107009754B - A kind of print head noise that reduces goes out needle arrangement mode - Google Patents

Abstract

The invention discloses it is a kind of reduce print head noise go out needle arrangement mode, it is 6 groups of 24 needle that print head, which goes out needle arrangement mode, which is characterized in that distribution mode is：Laterally 24 rows of setting, often capable to set a needle, the longitudinal pitch between adjacent needles is all 1P, if 1P is 1/180 inch；First row includes two needles, and secondary series includes four needles, and third row include six needles, and the 4th row include six needles, and the 5th row include four needles, and the 6th row include two needles, and each row are at one group, and first row is first group, and same group of needle is on same vertical line；On the basis of first group, second group of horizontal spacing to the 6th group of first group of distance is respectively L21, L22, L23, L24, L25, wherein：L21=(1+6/8) P, L22=(5+4/8) P, L23=(12+5/8) P, L24=(16+3/8) P, L25=(18+1/8) P.The present invention accomplishes that each column needle is staggered and alternately goes out needle, avoids multiple row needle while going out needle, ensure that the peak noise of print needle operation is preferably minimized in this way, improves user experience；The peak power of print needle operation is set to be preferably minimized, it is lower to power requirement.

Description

A Needle Arrangement Method for Reducing the Noise of Printing Head

technical field

The invention relates to the technical field of printing, in particular to a needle output arrangement mode for reducing the noise of a printing head.

Background technique

The dot matrix printer realizes printing by hitting the ribbon when the printing needle is ejected. Since the striking frequency of the ejecting needle is fast, there will be a lot of noise during the working process. This is determined by the working method of the dot matrix printer, and it is also the flaw of the dot matrix printer. Therefore, reducing the noise of the print head has always been a research topic for dot matrix printer manufacturers.

The pin arrangement of the Fujitsu print head is generally 24 pins in 6 groups, and the 24 pins are numbered 1, 2, 3...24 in sequence. In order to simplify and facilitate understanding, the pin numbered 1 is simplified to "1", and the numbered The pin of 2 is simplified to "2"... and so on, as shown in Figure 1. Among them, 11, 13 is a group, recorded as the first group, 7, 9, 15, 17 is a group, recorded as the second group, 1, 3, 5, 19, 21, 23 is a group, 2, 4, 6, 20, 22, 24 are a group, 8, 10, 16, 18 are a group, 12, 14 are a group, a total of 6 groups of needles, the same group of needles are on the same vertical line. In the transverse direction, the spacing of each group of needles relative to the first group of needles is as follows ("P" in the following text means 1/180 inch): L11=2P, L12=5P, L13=12P, L14=15P, L15=17P. In the longitudinal direction, the distance between 1 and 24 is L16=23P, and the distance between each needle numbered in sequence is 1P, that is, the vertical distance between 1 and 2 is 1P, and the vertical distance between 2 and 3 is 1P, in turn analogy. The noise of the needle is related to the number of needles at the same time point, the more the number of needles at the same time, the greater the noise. As shown in Figure 2, the distribution positions of 24 needles, 1, 2, 3...24 are 24 printing needles, the hollow dots indicate the needle positions, and the horizontal and vertical spacing are 1/180 inch (printing resolution is 180dpi), whether the needle is ejected or not needs to be determined according to the actual printing data. When the printing needles of 11 and 13 are in the needle-out position, the remaining 5 groups of printing needles are also in the needle-out position. When the printing needles of 11 and 13 are in the needle-out position, the remaining 5 groups of printing needles Needles will also be ejected at the same time, so the print head in this arrangement has no way to avoid the situation that multiple sets of needles are ejected at the same time, that is, it will cause a lot of noise during the printing process.

Contents of the invention

The purpose of the present invention is to provide a needle ejection arrangement that reduces the noise of the printing head, so that each group of needles is staggered and alternately ejected, avoiding the situation that multiple groups of needles eject needles at the same time, thereby reducing the noise during work.

The present invention adopts following technical scheme to realize:

A needle-out arrangement that reduces the noise of the print head. The needle-out arrangement of the print head is 24 needles in 6 groups, and the distribution is as follows: 24 rows are set horizontally, each row has one needle, and the vertical distance between adjacent needles is 1P, let 1P be 1/180 inch; the first column includes two needles, the second column includes four needles, the third column includes six needles, the fourth column includes six needles, the fifth column includes four needles, the sixth column includes two Needles, each column forms a group, the first column is the first group, and the needles of the same group are on the same vertical line;

Based on the first group, the horizontal distances from the second group to the sixth group to the first group are L21, L22, L23, L24, L25 respectively, and the vertical distance from the first row to the twenty-fourth row is L26, where:

L21=(1+6/8)P, L22=(5+4/8)P, L23=(12+5/8)P, L24=(16+3/8)P, L25=(18+1 /8)P, L26=1P*23.

Set the needle-out period as T and the moving distance of the print head as 1P, then the needle-out delay time of the 6 rows of needles is as follows: No delay in the first row; 2T/8 delay in the second row; 4T/8 delay in the third row ; The delay of the fourth column is 3T/8; the delay of the fifth column is 5T/8; the delay of the sixth column is 7T/8.

Compared with the 24-needle 6-column print head described in the background technology, the printing head of the present invention has the same needle output cycle. The print head based on the above-mentioned needle arrangement method, when printing with a resolution of 180dpi, due to the distance from the second column to the sixth column by 1 The relationship between the spacing of columns and 1/180 inches is not an integer multiple. Under the premise that the needle output cycle remains unchanged, it is necessary to delay the needle output from the second to sixth columns to ensure that the printing needles are ejected at the needle ejection position without any delay. No printing misalignment will occur.

The present invention adopts the beneficial effects brought by the above-mentioned technical scheme:

The present invention achieves that each row of needles is staggered and alternately ejected, avoiding multiple rows of needles being ejected at the same time, thus ensuring that the peak noise when the printing needle is working is minimized, and the user experience is improved; the peak power consumption of the printing needle is reduced to a minimum when the printing needle is working. Minimum, lower power requirements.

Description of drawings

Figure 1 is a schematic diagram of the 24-pin arrangement of the old print head.

Figure 2 is a schematic diagram of the 24-needle arrangement and needle-out position of the old print head.

Fig. 3 is a schematic diagram of the arrangement of 24 pins of the printing head of the present invention.

FIG. 4 is a schematic diagram of the arrangement of each group of printing head needles and the position of the needles when the first group of printing needles is in the needle-exiting state of the present invention.

Fig. 5 is a schematic diagram of the arrangement of each group of printing head needles and the positions of the needles when the second group of printing needles is in the needle-exiting state of the present invention.

Detailed ways

As shown in Figure 4, the printhead needles are arranged in 6 groups of 24 needles, specifically: the 24 needles are numbered 1, 2, 3...24 in sequence, and the distribution method is: 24 rows in the horizontal direction, each row has a needle, corresponding The spacing between adjacent needles is 1P, that is, the spacing between 1 and 2, 2 and 3 is 1P, and the spacing between 1 and 24 is 23P. Let 1P be 1/180 inches; The row includes two stitches, the second row includes four stitches, the third row includes six stitches, the fourth row includes six stitches, the fifth row includes four stitches, the sixth row includes two stitches, and each row forms a group. One group.

As shown in Figure 3 and 4, 11, 13 is a group, 7, 9, 15, 17 is a group, 1, 3, 5, 19, 21, 23 is a group, 2, 4, 6, 20, 22, 24 is a group, 8, 10, 16, 18 is a group, 12, 14 is a group, a total of 6 groups of needles, the same group of needles are on the same vertical line, that is, the same group of needles are in the same row.

As shown in Figure 3, in the horizontal direction, taking the first group as the reference, the distances from the second group to the sixth group to the first group are L21, L22, L23, L24, L25 respectively, and the distance between the first row and the twenty-fourth row The spacing is L26.

The distance between each group of needles relative to the first group of needles is as follows: L21=(1+6/8)P, L22=(5+4/8)P, L23=(12+5/8)P, L24=(16 +3/8)P, L25=(18+1/8)P, L26=1P*23.

Compared with the 24-needle 6-column print head described in the background technology, the printing head of the present invention has the same needle output cycle. The print head based on the above-mentioned needle arrangement method, when printing with a resolution of 180dpi, due to the distance from the second column to the sixth column by 1 The relationship between the spacing of columns and 1/180 inches is not an integer multiple. Under the premise that the needle output cycle remains unchanged, it is necessary to delay the needle output from the second to sixth columns to ensure that the printing needles are ejected at the needle ejection position without any delay. No printing misalignment will occur. Assuming that the needle-out cycle is T, the needle-out delay time of the 6 rows of needles is as follows: the first row has no delay; the second row has a delay of 2T/8; the third row has a delay of 4T/8; the fourth row has a delay of 3T/8 8; The delay of the fifth column is 5T/8; the delay of the sixth column is 7T/8.

Taking Figure 4 as an example, when the print head moves from left to right and the first column is at the needle exit position, the distances from the second column to the sixth column to the next needle exit position can be calculated as (2/8 )P, (4/8)P, (3/8)P, (5/8)P, (7/8)P. Given a needle-exit cycle T, the print head moves a distance of 1P. Therefore, in this needle-out cycle, it is only necessary to delay the needles in the second row to the sixth row by 2T/8, 4T/8, 3T/8, 5T/8, and 7T/8, so that the five groups of needles can be The needle is ejected from the needle exit position without printing misalignment. Due to the delay processing, the 6 rows of needles can only be ejected at different times in the same cycle, so that the 6 rows of needles are staggered and alternately ejected, avoiding the simultaneous ejection of multiple rows of needles, thereby reducing the peak noise when the printing needle is working.

As shown in Figure 5, when a group of printing needles 7, 9, 15, and 17 are at the needle exit position, the remaining 5 groups of needles are not at the needle exit position, and are respectively at the needle exit positions (6/8)P, (2 The position of /8)P, (1/8)P, (3/8)P, (5/8)P can be understood as 7, 9, 15, 17 as a group of needles, when the other 5 There is no possibility of needles being ejected at the same time in group needles. By analogy, when each group is in the needle-out position, the other five groups are not in the needle-out position. That is to say, it can be understood that no matter which group of needles is ejected, there is no possibility of the other 5 groups of needles being ejected at the same time. Therefore, the print head in this arrangement can stagger each group of needles and alternately eject needles, avoiding the situation that multiple groups of needles eject needles at the same time, and the needles are more evenly dispersed, thereby reducing the noise of the print head when it is working.

The embodiment is only to illustrate the technical idea of the present invention, and can not limit the scope of protection of the present invention with this. All technical ideas proposed in the present invention, any changes made on the basis of technical solutions, all fall within the scope of protection of the present invention .

Claims (2)

1. A needle-out arrangement for reducing print head noise. The needle-out arrangement of the print head is 6 groups of 24 needles. It is characterized in that the distribution method is: 24 rows are arranged horizontally, and each row is provided with one needle. The vertical spacing between them is 1P, let 1P be 1/180 inch; the first column includes two needles, the second column includes four needles, the third column includes six needles, the fourth column includes six needles, and the fifth column includes four needles , the sixth column includes two needles, each column forms a group, the first column is the first group, and the needles of the same group are on the same vertical line; Based on the first group, the horizontal distances from the second group to the sixth group to the first group are L21, L22, L23, L24, L25 respectively, and the vertical distance from the first row to the twenty-fourth row is L26, where: L21=(1+6/8)P, L22=(5+4/8)P, L23=(12+5/8)P, L24=(16+3/8)P, L25=(18+1 /8)P, L26=1P*23. 2. A needle-out arrangement method for reducing print head noise according to claim 1, wherein the needle-out period is set as T, and the moving distance of the print head is 1P, then the needle-out delay time of 6 columns of needles is as follows : The first column has no delay; the second column has a delay of 2T/8; the third column has a delay of 4T/8; the fourth column has a delay of 3T/8; the fifth column has a delay of 5T/8; the sixth column has a delay of 7T /8.