CN115534531A - Full dot matrix printing device - Google Patents

Abstract

The invention relates to a full dot matrix printing device, belonging to the technical field of industrial printers, comprising: the printing head comprises M multiplied by N printing pen cores, a pen head frame, M multiplied by N electromagnetic push rods, an electromagnetic push rod frame and a printing head electric control plate; the printing head is controlled in three degrees of freedom through the rotary positioning mechanism, the straight-moving positioning mechanism and the lifting positioning mechanism; the printing device electric control board is electrically connected with the printing head, the rotary positioning mechanism, the straight-moving positioning mechanism and the lifting positioning mechanism and sends a control signal; and the power supply is electrically connected with the printing head, the rotary positioning mechanism, the straight-line positioning mechanism, the lifting positioning mechanism and the electric control board. The invention can not only improve the working efficiency and reduce the error rate, but also is beneficial to the deep tracking and service of the product, and lays a good foundation for the accurate information feedback of the product; can be applied to industrial printers.

Description

Full dot matrix printing device

technical field

The invention relates to a full dot-matrix printing device, which belongs to the technical field of industrial printers.

Background technique

Existing industrial coding machines are mainly used for printing on relatively smooth surfaces such as metals, plastics, and paper. It cannot be used for rougher surfaces such as larger concrete products, rough metal components, and braids. Usually, manual printing is used, but there will be problems such as lower work efficiency and increased error rate. Similar to a spraying device for utility poles disclosed in patent CN202021307334.0, although this type of contact spraying device can achieve certain effects, once the types and quantities of sprayed products are too many, how to quickly switch the printing font and reduce the number of printing heads? The frequency of dipping ink has become an urgent problem to be solved; at the same time, the existing printing equipment often adopts linear equipment, which does not meet the requirements of complex printing components, lacks flexibility, and the printing effect is not good.

Contents of the invention

Aiming at the above defects in the prior art, the present invention proposes a full dot matrix printing device.

The full dot matrix printing device of the present invention includes:

Print head, including M×N square head printing refills, pen holder, M×N electromagnetic push rods, electromagnetic push rod holder and print head electric control board;

The rotary positioning mechanism includes a base. A number of parallel rollers are installed above the base. A number of print head rotating chucks are connected to the top of the rollers. A print head fixing chuck is arranged in the middle of the printing head rotating chuck. The printing head fixing chuck The upper part is fixedly connected with the print head, the inside of the print head is equipped with an angle positioner, the bottom of the print head is equipped with a camera, and the roller is connected with the stepping motor;

The straight positioning mechanism includes a base. A worm is arranged above the base. One end of the worm is rotationally connected to a bevel gear. A stepper motor is connected to the top of the bevel gear through a connecting shaft. There are guide rails, and a rotary positioning mechanism is connected to the upper part of the worm slider through the receiving plate. The two ends of the receiving plate are connected to the photoelectric switch support column, and the end face detection photoelectric switch is installed above the photoelectric switch support column, and the distance measuring sensor is also installed on the receiving plate;

The lifting and positioning mechanism includes a base, a distance measuring sensor is installed on one side of the base, a bevel gear is installed on one side of the distance measuring sensor, a worm is connected above the bevel gear, a slider is slidably connected to the outside of the worm, and the bevel gear is connected through a connecting shaft There is a stepping motor, and a straight positioning mechanism is connected to the slider;

The electronic control board of the printing device is electrically connected with the print head, the rotary positioning mechanism, the straight positioning mechanism and the lifting positioning mechanism, and sends control signals;

The power supply is electrically connected with the printing head, the rotary positioning mechanism, the straight positioning mechanism, the lifting positioning mechanism and the electric control board.

Preferably, the printing refill of the printing head is placed on the horizontal extension line of the end of the electromagnetic push rod, and includes a refill and a refill push rod, wherein the buffer component is coupled between the refill push rod and the electromagnetic push rod between.

Preferably, the electromagnetic push rod frames of the print head are arranged parallel to each other, and include slots arranged in a dot matrix, wherein the slots are installed with electromagnetic push rods and printing refills.

Preferably, the nib holder is composed of a square groove that can tightly wrap the nib on one side, and a cuboid with round holes at both ends; the side without the square groove has long holes on the four sides for ink, and the inside is equipped with apertures and The square sponge with the same diameter at the tail of the nib is used to absorb ink and then transfer the ink to the nib through the tail of the nib wrapped by it; the outer diameter of the nib holder is slightly smaller than the inner diameter of the pen cartridge, and its outer layer is covered with a soft sealing material.

Preferably, the print head electric control board receives printing information, that is, K-digit numbers or letters, or even other characters, and prints one by one in one direction; and when printing each character, according to the needs of the dot matrix font, the print head electric control Control the energization of the electromagnetic push rod corresponding to the printing refill.

Preferably, the electronic control board of the print head receives the specification code from the electronic control board of the printing device through the communication module, and then forms a dot matrix font. After the printer controls the printing position, it finally drives the electromagnetic push rod to implement printing.

Preferably, the electronic control board of the printing device is equipped with a self-checking functional module of the electromagnetic push rod, a functional module of counting the printing times of the refill, a functional module of maintenance warning, and a functional module of ink volume estimation and warning.

Preferably, the printing head is controlled in three degrees of freedom through a rotary positioning mechanism, a straight positioning mechanism and a lifting positioning mechanism to move the printing head to a suitable printing position.

The beneficial effects of the present invention are: the full-dot-matrix printing device described in the present invention, in addition to improving work efficiency and reducing error rates, is also conducive to in-depth tracking and service of products, laying a good foundation for accurate information feedback of products; In view of the automation and even intelligence of the coding machine, it is very conducive to the timely and effective collection of information, which improves the degree of informatization of the enterprise, makes the application of software platforms such as ERP more effective, further improves the economic and social benefits of the enterprise, and is more conducive to The development of enterprise intelligent manufacturing;

The full dot-matrix printing device of the present invention has two aspects of social benefits: one is to reduce personal injury: manual brushing of labels or codes will use paint, and most paints are harmful to the human body; the other is to improve The informatization level of the manufacturing industry has been improved: manual operation is replaced by automatic coding (labeling), which improves the timeliness and effectiveness of information collection, making the coding (labeling) process digital and informatized; Uninterrupted printing during the printing process improves printing efficiency; the print head is combined with a three-degree-of-freedom rotary positioning mechanism, a straight positioning mechanism and a lifting positioning mechanism to realize flexible printing of complex components and improve printing accuracy.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a structural schematic diagram of a dot matrix font.

Fig. 3 is a structural schematic diagram of a print head.

Fig. 4 is a schematic structural view of the printing refill.

Fig. 5 is a schematic structural view of the rear end plate of the printing refill frame.

Fig. 6 is a structural schematic diagram of a printed electromagnetic push rod.

Fig. 7 is a structural schematic diagram of the rear end plate of the electromagnetic push rod frame.

Fig. 8 is a structural schematic diagram of the rotation positioning mechanism.

Fig. 9 is a structural schematic diagram of the straight-travel positioning mechanism.

Fig. 10 is a structural schematic diagram of the lifting and positioning mechanism.

In the figure: 1. Electromagnetic push rod; 2. Printing refill; 21. Refill; 211. Printing tip; 212. Pen cartridge; 22. Refill push rod; 3. Buffer component; 31. Spring; 32. Refill Spring; 33. Rubber block; 4. Non-conductor end plate; 5. Printing end face; 6. Positioning sleeve; 7. Positioning shaft; 8. End face detection photoelectric switch; 9. Distance measuring sensor; 10. Angle detector; 11 , roller; 12, stepping motor; 13, print head; 14, camera; 15, rotary chuck of print head without teeth; 16, dot matrix font; Rod holder rear end plate.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1:

As shown in Figure 1, the full dot matrix printing device of the present invention includes:

Print head 13, including M×N square head printing refills 2, pen holder, M×N electromagnetic push rods 1, electromagnetic push rod holder and print head electric control board;

The rotary positioning mechanism includes a base. A number of parallel rollers 11 are installed above the base. A number of print head rotating chucks are contacted and connected above the base. A print head 13 is fixedly connected to the chuck, an angle detector 10 is arranged inside the print head 13, a camera 14 is arranged below the print head 13, and the roller 11 is connected to the roller 12;

The straight positioning mechanism includes a base. A worm is arranged above the base. One end of the worm is rotated and connected with a bevel gear. The top of the bevel gear is connected with a roller 12 through a connecting shaft. The worm is also slidably connected with a worm slider. There are guide rails, and a rotating positioning mechanism is connected to the upper part of the worm slider through a receiving plate. The two ends of the receiving plate are connected with photoelectric switch support columns. The photoelectric switch support column is equipped with an end face detection photoelectric switch 8, and a distance measuring sensor 9 is also installed on the receiving plate. ;

The lifting and positioning mechanism includes a base, a distance measuring sensor 9 is installed on one side of the base, a bevel gear is installed on one side of the distance measuring sensor 9, a worm is connected above the bevel gear, a slider is slidably connected to the outside of the worm, and the bevel gear is connected The shaft is connected with a roller 12, and the slider is connected with a straight positioning mechanism;

The electric control board is electrically connected with the print head 13, the rotary positioning mechanism, the straight-line positioning mechanism and the lifting positioning mechanism, and sends control signals;

The power supply is electrically connected with the print head 13, the rotary positioning mechanism, the straight positioning mechanism, the lifting positioning mechanism and the electric control board.

Dot matrix font 16 is as shown in Figure 2. The print head 13 adopts M×N (for example: row×column=7×5) dot matrix fonts 16 .

The structure of the print head 13 is shown in FIG. 3 . The print head 13 can print one number at a time, and can also print row by row and column by row, mainly depending on the requirements of power supply and printing efficiency. Whole print head 13 is made of M * N (not limited) square head square body (or round body) printing pen core 2, pen core 21 frame, M * N electromagnetic push rod 1, electromagnetic push rod frame and print head electric Control board composition. During actual installation, the front and rear non-conductive end plates 4 of the pen refill 21 frame, the front and rear non-conductive end plates 4 of the electromagnetic push rod 1, and the electric control board have the same length and width, and can be fixed by the slots on both sides and the bottom, which is convenient for installation . In order to facilitate installation and maintenance, the electromagnetic push rod 1 and the electric control board are connected by pins. By adding detection points on each drive circuit of the electromagnetic push rod 1, the self-test function is realized. When in use, the print head electric control board receives printing information, that is, K-digit numbers or letters, or even other characters, and prints them one by one on the printing end surface 5 in one direction. When each character is printed, according to the needs of the dot matrix font 16, the electric control board controls the corresponding electromagnetic push rod 1 of the printing pen core 2 to be energized. If the power supply is large enough, it can be printed at one time with high efficiency; if the power supply design is small and high efficiency is not required, it can be divided into M times (row printing) or N times (column printing), row by row or row by column. The electric control board records the number of times that each pen core 21 prints, and then according to experience, proposes that the pen core 21 lacks ink and reports to the police.

The composition structure of the printing refill 2 is shown in FIG. 4 . Printing refill 2 is used for a point of dot matrix font 16. The pen core 21 is made up of a printing nib 211 , a nib frame and a pen cartridge 212 . The printing nib 211 is made up of a soft square nib similar to the material of a marker pen and a round ink-absorbing rod with a tapered tail, which can be easy to store ink, discharge ink and penetrate quickly. The nib holder is composed of a square groove that can tightly wrap the nib on one side, and a cuboid with round holes (slightly larger than the diameter of the tail of the nib) at both ends; the side without the square groove has long holes on the four sides for entering ink, and the inside is equipped with The square sponge with the same aperture and the diameter of the nib tail is used for absorbing ink, and then the ink is passed to the nib through the nib tail wrapped by it; Sealing material, when the nib frame is combined with the ink cartridge 212, there will be no ink leakage. The pen ink box 212 is used for storing ink, and it is designed to be square so that under the same print head 13 volume, the pen core 21 stores more ink, but when the square pen ink box 212 is difficult to seal, the round pen core 21 can be used, and at the same time Change the shape of the pen core 21 rack holes; the length of the pen ink box 212 is determined by storing the ink quantity of a shift or a day.

The structure of the rear end plate 17 of the printing refill frame is shown in FIG. 5 . The printing refill frame rear end plate 17 is used for installing and fixing the printing refill 2. Printing pen core frame is made up of front non-conductor end plate 4, printing pen core frame rear end plate 17, pen core spring 32 and spring card. Front non-conductor end plate 4 is used for the support of pen core 21 and advance guide, and its thickness is hf millimeter (hf=4-6mm), has M * N square holes (when pen core 21 is circular, is circle hole), the length and width of the square hole are slightly greater than the length and width of the pen core 21, and the eight edges at the two ends of the hole will be rounded to prevent the pen core 21 from being stuck when the pen core 21 advances. The rear end plate 17 of the printing refill holder is also used for the support and travel guide of the refill 21. Its thickness is hr millimeters (hr=1mm), with M×N round holes, and the diameter of the round holes is slightly larger than the tail end of the refill 21 The diameter of the cylinder and the rounded edges at both ends of the round hole will be rounded to prevent the pen core 21 from being stuck when the pen core 21 is advancing; three claws are directly punched on the left, right, and lower sides of the round hole for clamping. Live the refill spring 32; the other end of the refill spring 32 is stuck in the groove of the refill 21 tail end with an elastic spring card, so that the refill spring 32 and the refill 21 are connected into an elastic moving body.

The structure of the electromagnetic push rod 1 is shown in FIG. 6 . The electromagnetic push rod 1 is used to promote the movement of a printing refill 2, so as to realize the printing of the refill 21. Electromagnetic push rod 1 is made up of coil, inner core spring 32 and armature. When power is applied, the cylinder (armature) of the electromagnetic push rod 1 moves forward in a straight line, thus pushing the pen core 21 to drive the nib to print. The top of push rod adds buffer spring 31 and the rubber block 33 of band iron shell, and purpose is to play elastic cushioning effect, in case nib or pen core 21 are damaged. In actual use, the rubber block 33 is closely connected with the tail end of the pen core 21 .

The structure of the rear end plate 18 of the electromagnetic push rod frame is shown in FIG. 7 . The electromagnetic push rod frame is used for installing and fixing the electromagnetic push rod 1 . Electromagnetic push rod frame is made up of front non-conductor end plate 4 and electromagnetic push rod frame rear end plate 18. The front non-conductor end plate 4 of the electromagnetic push rod frame has the same structure as the front non-conductor end plate 4 of the pen core frame, and is also used for supporting and advancing the electromagnetic push rod 1. The rear end plate 18 of the electromagnetic push rod frame fixes the electromagnetic push rod 1, and its thickness is hr millimeters (hr=1mm), facing the tail circumference of the electromagnetic push rod 1, a U-shaped card slot is punched out for clamping the electromagnetic push rod. The afterbody of bar 1 makes electromagnetic push rod 1 be fixed on the rear end plate 18 of electromagnetic push rod frame. In addition, a hole is punched on one side of the U-shaped groove for passing through the electric wire of the electromagnetic push rod 1 .

The printhead electronics control board is used to control communication and printing. The print head electronic control board is composed of a controller (CPU), an optocoupler, an electromagnetic push rod 1 driver, and a WiFi (or 5G, LoRa or even 485, etc.) communication module. The electronic control board of the print head receives the specification code (3 is a decimal number) from the electronic control board of the printing device through communication, and then forms a dot matrix font 16. After the printer controls the printing position, it finally drives the electromagnetic push rod 1 to implement printing. In addition, the electronic control board of the print head can realize the self-check of the electromagnetic push rod 1, the statistics of the printing times of the refill 21, the maintenance warning, the ink volume estimation and warning, etc.

The electric control board is composed of a controller (CPU), an optocoupler, a roller 12 drive module, a communication module, a human-machine interface and a power supply module. The communication module adopts WiFi, 5G, LoRa, 485 and other communication methods. Responsible for receiving tasks and controlling the rotation of the print head 13, the movement of the straight-line positioning mechanism and the lifting positioning mechanism, and communicating with the monitoring machine through the communication module to receive tasks or transmit data for storage by the monitoring machine.

Power supply, the voltage level of the power supply is divided into three grades: 5V, 12V and 24V, which are respectively used for the CPU, the electromagnetic push rod 1 of the print head 13, the roller 12 and the photoelectric switch. The power of each grade needs to be based on the efficiency and print size Wait for the specific needs to be determined.

Example 2:

The printing head 13 described in the present invention is controlled by three degrees of freedom through the rotary positioning mechanism, the straight positioning mechanism and the lifting positioning mechanism to move the printing head 13 to a suitable printing position.

As shown in FIG. 8 , the rotation mechanism of the print head 13 is used for positioning the printing position of the circular or arc-shaped end surface, and the rotation positioning mechanism is not required for straight line printing.

The rotary positioning mechanism consists of 1 roller 12, 3 gears, 2 rollers 11, 1 rotary chuck with teeth, 1 rotary chuck 15 without teeth, 1 fixed chuck, 1 absolute photoelectric encoder, 1 high-definition camera 14 and a base, the absolute photoelectric encoder is installed on the bracket on one side of the base, and two parallel rollers 11 are mounted on one side of the absolute photoelectric encoder through the bracket, and the two rollers The wheel 11 is used as a driven wheel to support the print head 13 and driven rotation; the outer side of the roller 11 near the absolute photoelectric encoder is connected to the ring-shaped rotary chuck of the toothed print head, and the rotary chuck of the toothed print head As the main drive chuck; another roller wheel 11 outside rotation is connected with a ring-type non-toothed print head rotary chuck 15, and the non-toothed print head rotary chuck 15 is used as a driven chuck; the band toothed print head rotary chuck and The height of the rotary chuck 15 of the printing head without teeth is the same, and the base of the middle position of the two rollers 11 is installed with the fixing ball buckle of the printing head 13 through the bracket, and the fixing chuck of the printing head is connected above the fixing ball buckle of the printing head 13. The print head fixing chuck can prevent the print head 13 from detaching from the base when the print head 13 is fixed by the ball buckle. There is a roller 12 under the rotary chuck of the toothed print head, a gear is installed on the roller 12, and two gears are installed on the base, which are used to accept and block the rotary chuck of the toothed print head 13 The gear meshed with the roller 12 is used as the driving gear, and the other gear is used as the driven gear. In this way, when the roller 12 rotates, the two gears on the base will drive the rotation of the rotary chuck of the toothed print head, thereby The print head 13 is rotated. The printhead fixed chuck is fixedly connected with the printhead 13 outside, the rotary chuck of the printhead with teeth and the rotary chuck 15 of the printhead without teeth are connected with the printhead 13 in rotation; A high-definition camera 14 is fixed in the ring of the disc 15 through a fixed sleeve of the high-definition camera 14. The high-definition camera 14 is used to take images of the surface to be printed, and the position of the characters to be printed is determined by an image recognition algorithm. When the print head 13 is rotated and positioned, the high-definition camera 14 first takes an image of the surface to be printed, uses the image recognition algorithm to determine the position of the character to be printed, and thus calculates the direction in which the print head 13 needs to rotate and its angle, and then starts The roller 12 drives the print head to rotate the chuck through the driving gear, so that the print head 13 rotates by a corresponding angle (number of steps), and then stops for printing.

As shown in FIG. 9 , the straight positioning mechanism is used to determine the distance between the print head 13 and the end surface to be printed, so that the printing device can print properly, and the print should be clear without damaging the print head 13 . The straight positioning mechanism is composed of 1 roller 12, 2 bevel gears, 1 set of worm and slider transmission mechanism, 1 laser distance measuring sensor 9, base and two photoelectric switches 8 for end face detection. There are four positioning bushes 6 on the base, and the positioning bushes 6 are used for co-installation with other mechanisms of the printing device. The four positioning bushes 6 are surrounded by I-shaped steel support beams to form a rectangular space, and the middle of the rectangular space is installed with a The worm and slider transmission mechanism are used to convert the rotary motion of the roller 12 into the linear motion of the rotary positioning mechanism; the worm is installed on the I-beam support beam through connecting screws, and the slider is slidably connected to the worm. There are guide rails parallel to the worm at each end, and the guide rails are also connected to the I-beam support beam through connecting screws; one end of the worm is rotationally connected with two intermeshing bevel gears, and the top of the bevel gear is connected with a roller 12 through a connecting shaft. The mounting plate, the roller 12 is installed on the mounting plate of the roller 12, and the roller 12 is used to drive the positioning mechanism. The print head 13 rotation positioning receiving plate is installed on the top of the guide rail and the slider, and the rotation positioning mechanism is installed above the printing head 13 rotation positioning receiving plate; A photoelectric switch support column is provided, and an end-face detection photoelectric switch 8 is arranged above the photoelectric switch support column. It is a pair of transparent photoelectric switches, which are used for the detection of the printing end surface, which is convenient for the printing head 13 to position the printing surface; the printing head 13 is rotated and positioned to accept A laser ranging sensor 9 is also mounted on the board for detecting the moving distance of the print head 13 for easy positioning.

In principle, the rotary positioning mechanism of the printer needs to return to the zero position when it is just turned on or after printing. When the printing straight positioning mechanism is in operation, the position of the print head 13 is first determined by the laser distance measuring sensor 9, and then the end face detection photoelectric switch 8 installed on the receiving plate of the rotary positioning mechanism is driven by the roller 12 to move forward. When the end face is detected, according to the distance between the print head 13 and the end face calculated in advance, the number of rotation steps of the roller 12 is determined, which is suitable for the print head 13 to print clear characters, and the print head 13 cannot be mechanically damaged; if it is not A suitable camera shooting distance can make the straight-moving positioning mechanism retreat or advance a suitable distance, which is convenient for taking images for rotating positioning. According to the calculated number of steps, continue to go straight to the appropriate printing distance, and stop the operation of the straight travel mechanism. Then, the position and angle of the characters are recognized according to the photographed end surface image, and the rotation and positioning mechanism rotates the printing head 13 to a proper position for printing. If there are still characters to be printed, the rotary positioning mechanism will position and print again until all characters are printed. Finally, the rotary positioning mechanism and the straight positioning mechanism all return to zero, waiting for the next printing.

As shown in Figure 10, the lifting positioning mechanism is used to determine the vertical distance between the print head 13 and the position to be printed, so that the print head 13 can print properly. The lifting positioning mechanism is composed of 1 roller 12, 2 bevel gears, 1 set of worm and slider transmission mechanism, 4 positioning shafts 7, and 1 laser distance measuring sensor 9. The 4 positioning shafts 7 are respectively installed on the straight positioning The inside of the mechanism positioning bushing 6 is used for cooperating installation with the straight positioning mechanism. The lifting positioning mechanism is installed below the straight positioning mechanism and shares the same base with the straight positioning mechanism. Three support beams, wherein a support beam positioned at the side is provided with a laser distance measuring sensor 9 on the base near one end of the I-beam support beam, and the laser distance measurement sensor 9 is used to measure the moving distance of the lifting and positioning mechanism, which is convenient for positioning; One side of the laser distance measuring sensor 9 is located in the middle of the support beam and is connected with a pair of bevel gears through the gear shaft, and one of the bevel gears is connected with a worm through a connecting piece, and the outside of the worm is slidably connected with a slider. A roller wheel 12 is installed on the supporting beam in the middle through the roller wheel 12 mounting plate. The roller wheel 12 is rotationally connected with one of the bevel gears through the connecting shaft and the connecting piece. It is used to convert the rotary motion of the roller 12 into the lifting motion of the straight positioning mechanism.

In principle, the lifting and positioning mechanism needs to return to the zero position when the machine is turned on or after printing. When the lifting positioning mechanism is in operation, the position of the straight positioning mechanism is first determined by the laser ranging sensor 9, and then the lifting position is determined according to the specification information received by the printing electronic control board, and then the straight positioning mechanism and the rotary positioning mechanism cooperate to print. After printing, the lifting and positioning mechanism returns to the zero position, waiting for the next printing task.

The invention can be widely used in industrial printers.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (8)

1. A full dot matrix printing apparatus, comprising:

the printing head (13) comprises M multiplied by N square head printing pen cores (2), a pen head frame, M multiplied by N electromagnetic push rods (1), an electromagnetic push rod frame and a printing head electric control board;

the rotary positioning mechanism comprises a base, wherein a plurality of rollers (11) arranged in parallel are arranged above the base, a printing head rotating chuck is in contact connection with the upper part of each roller (11), a printing head fixing chuck is arranged in the middle of each printing head rotating chuck, a printing head (13) is fixedly connected onto each printing head fixing chuck, an angle detector (10) is arranged in each printing head (13), a camera (14) is arranged below each printing head (13), and each roller (11) is connected with each roller (12);

the straight-moving positioning mechanism comprises a base, wherein a worm is arranged above the base, one end of the worm is rotatably connected with a bevel gear, a roller (12) is connected above the bevel gear through a connecting shaft, a worm slider is also slidably connected onto the worm, guide rails are respectively arranged on two sides of the worm, the rotary positioning mechanism is connected above the worm slider through a receiving plate, two ends of the receiving plate are connected with photoelectric switch support columns, end face detection photoelectric switches (8) are arranged above the photoelectric switch support columns, and a distance measuring sensor (9) is also arranged on the receiving plate;

the lifting positioning mechanism comprises a base, wherein a distance measuring sensor (9) is installed on one side of the base, a conical gear is installed on one side of the distance measuring sensor (9), a worm is connected above the conical gear, a sliding block is connected to the outer side of the worm in a sliding mode, the conical gear is connected with a roller (12) through a connecting shaft, and a straight-moving positioning mechanism is connected to the sliding block;

the printing device electric control board is electrically connected with the printing head (13), the rotary positioning mechanism, the straight-moving positioning mechanism and the lifting positioning mechanism and sends a control signal;

and the power supply is electrically connected with the printing head (13), the rotary positioning mechanism, the straight-moving positioning mechanism, the lifting positioning mechanism and the electric control board.

2. The full dot matrix printing apparatus according to claim 1, wherein the printing cartridge (2) of the print head (13) is disposed on a horizontal extension line of the end of the electromagnetic push rod (1) and comprises a cartridge (21) and a cartridge push rod (22), wherein the buffer member (3) is coupled between the cartridge push rod (22) and the electromagnetic push rod (1).

3. The full dot matrix printing device according to claim 1, wherein the electromagnetic push rod frames of the printing head (13) are arranged in parallel with each other and comprise slot holes arranged in a dot matrix, wherein the slot holes are penetrated and provided with the electromagnetic push rod (1) and the printing pen core (2).

4. The full-dot matrix printing device according to claim 1, wherein the pen head frame is composed of a square groove with one side capable of tightly wrapping the pen head, and a cuboid with round holes at two ends; the four sides of one side without the square groove are provided with long holes for feeding ink, and the square sponge with the same diameter as the tail part of the pen point is arranged in the square hole and used for absorbing ink and then transmitting the ink to the pen point through the tail part of the pen point wrapped by the square sponge; the external diameter of the pen head frame is slightly smaller than the internal diameter of the pen ink box (212), and the external layer of the pen head frame is sleeved with a soft sealing material.

5. The full dot matrix printing device according to claim 1, wherein the print head electric control board receives printing information, namely K digits or letters, even other characters, and one direction is printed one by one; and when each character is printed, the electromagnetic push rod (1) corresponding to the printing pen core (2) is controlled to be electrified by the printing head electric control plate according to the requirement of the dot matrix (16).

6. The full-dot matrix printing device according to claim 1, wherein the print head electronic control board receives the specification code from the printing device electronic control board through the communication module, then forms a matrix (16), and finally drives the electromagnetic push rod (1) to print after the printer controls the printing position.

7. The full-dot matrix printing device according to claim 1, wherein the printing device electric control board is provided with a self-checking function module of the electromagnetic push rod (1), a printing frequency counting function module of the pen core (21), a maintenance early warning function module and an ink amount estimation early warning function module.

8. The full dot matrix printing apparatus according to claim 1, wherein the print head (13) is controlled in three degrees of freedom via a rotational positioning mechanism, a rectilinear positioning mechanism, and a lifting positioning mechanism to move the print head (13) to a suitable printing position.

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