Spray head structure of code spraying printer

Abstract

The utility model provides a spray head structure of a code spraying printer, which comprises a base plate, a driving mechanism arranged on one side of the base plate and a nozzle plate connected with the other side of the base plate, a spraying cavity used for containing ink is formed between the nozzle plate and the base plate, and a plurality of spraying holes communicated with the spraying cavity are formed in the nozzle plate in an array mode. The driving mechanism comprises a movable core separably abutting against the spraying hole, a flexible air rod is arranged in the spraying cavity, a first check block used for fixing the flexible air rod is arranged in the position, in the spraying cavity, of the base plate, and an ink inlet communicated with the spraying cavity is formed in the base plate; the number of the flexible gas rods is two, the two flexible gas rods are arranged on the two sides of the movable core respectively, and the first check blocks are arranged between the flexible gas rods and the movable core in an array mode. According to the ink-jet printer nozzle structure provided by the utility model, the flexible air rod is arranged in the spraying cavity, the pressure change in the spraying cavity is buffered through the compression and expansion of the flexible air rod when ink is sprayed out and stopped, the pressure in the spraying cavity is kept stable and balanced, and the jet printing effect of the nozzle is better.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a nozzle structure of a coding printer. Background Art

[0002] Inkjet printers are widely used in the outer packaging of food, beverages, wine, etc., as well as various steel pipes, woven bags, gypsum boards, etc. They can be used in workshops, warehouses, logistics freight yards, offices, etc., and can print production dates, operation serial numbers, production shift numbers, anti-counterfeiting and anti-channeling codes, company names, graphic icons, etc. According to the principle, inkjet printers are divided into continuous inkjet technology, on-demand inkjet technology, and thermal foaming inkjet technology. Among them, on-demand inkjet technology printers are divided into three types: piezoelectric inkjet technology, valve-type inkjet technology, and thermal foaming inkjet technology, and the working principle of each is also different.

[0003] Among them, the nozzle of the pressure valve inkjet printer (large character inkjet printer) is composed of 7 or 16 groups of high-precision intelligent micro valves. When printing, the characters or graphics to be printed are processed by the computer motherboard, and a series of electrical signals are output to the intelligent micro solenoid valve through the output board. The valve is quickly opened and closed, and the ink is ejected into ink dots relying on the constant pressure inside the spray chamber. When most valves are opened at the same time, the ink flows out at the same time. Due to the limited ink supply, it cannot be quickly filled within 100-200 microseconds, causing the pressure in the cavity to drop instantly and the printing quality to decline. In order to ensure the printing effect, there is often a certain amount of air in the spray chamber to ensure the stability of the pressure of the ejected ink, and the pressure changes greatly when the air buffer nozzle is sprayed; however, when the nozzle is continuously sprayed for a long time, the continuous opening and closing of the valve will cause the air in the spray chamber to reduce the air content, resulting in unstable pressure in the spray chamber, which makes the printing effect of the nozzle poor.

[0004] When the existing inkjet printer nozzle is continuously printing, the pressure of the ink sprayed is unstable, which leads to poor printing effect of the nozzle. This solution solves this technical problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a nozzle structure for an inkjet printer.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a nozzle structure of an inkjet printer, comprising a base plate, a driving mechanism arranged on one side of the base plate, and a nozzle plate connected to the other side of the base plate, a spray cavity for accommodating ink is formed between the nozzle plate and the base plate, a plurality of spray holes connected to the spray cavity are arrayed on the nozzle plate, the driving mechanism comprises a moving core detachably abutting against the spray holes, a flexible gas rod is arranged in the spray cavity, a block for fixing the flexible gas rod is arranged on the base plate in the spray cavity, and an ink inlet connected to the spray cavity is arranged on the base plate.

[0007] There are two flexible gas rods, which are respectively arranged on both sides of the moving core, and a plurality of stoppers are arranged in an array between the flexible gas rods and the moving core.

[0008] The nozzle plate is provided with a plurality of stoppers 2 in an array in the spray chamber for fixing the position of the flexible gas rod.

[0009] A sealing ring is arranged between the nozzle plate and the base plate.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) A flexible gas rod is provided in the spray chamber. The compression and expansion of the flexible gas rod buffer the changes in the pressure in the spray chamber when the ink is sprayed and stopped. When the nozzle is printing, the pressure in the spray chamber remains stable and balanced, and the printing effect of the nozzle is better.

[0012] (2) A plurality of stoppers 1 are arranged on the substrate, and a plurality of stoppers 2 are arranged on the nozzle plate. Stoppers 1 and 2 are used to limit the flexible gas rod and ensure the contact between the ink and the flexible gas rod, so that the extension and expansion of the flexible gas rod are more stable and reliable, thereby ensuring the stability of the pressure in the spray chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structural decomposition of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the base plate of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the nozzle plate of the utility model.

[0016] Among them, in the figure: 1, nozzle plate; 11, spray hole; 12, block 2; 2, base plate; 21, spray chamber; 22, block 1; 23, ink inlet; 3, driving mechanism; 31, moving core; 4, flexible gas rod; 5, sealing ring. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0018] See also Figure 1-Figure 3 , a nozzle structure of an inkjet printer, comprising a base plate 2, a driving mechanism 3 arranged on one side of the base plate 2, and a nozzle plate 1 connected to the other side of the base plate 2, characterized in that a spray cavity 21 for accommodating ink is formed between the nozzle plate 1 and the base plate 2, a plurality of spray holes 11 connected to the spray cavity 21 are arranged in an array on the nozzle plate 1, the driving mechanism 3 comprises a moving core 31 detachably abutting against the spray holes 11, a flexible gas rod 4 is arranged in the spray cavity 21, a block 22 for fixing the flexible gas rod 4 is arranged on the base plate 2 in the spray cavity 21, and an ink inlet 23 connected to the spray cavity 21 is arranged on the base plate 2.

[0019] Two flexible gas rods 4 are provided, and the two flexible gas rods 4 are respectively arranged on both sides of the moving core 31 , and a plurality of stoppers 22 are arranged in an array between the flexible gas rods 4 and the moving core 31 .

[0020] A plurality of stoppers 12 for fixing the position of the flexible gas rod 4 are arranged in an array in the spray chamber 21 on the nozzle plate 1 .

[0021] A sealing ring 5 is provided between the nozzle plate 1 and the base plate 2 .

[0022] The specific working process of this utility model:

[0023] After the printer is started, the spray chamber 21 contains ink with a certain pressure. The pressure of the spray chamber 21 compresses the flexible gas rod 4, and the gas in the flexible gas rod 4 stores energy. When the moving core 31 retracts, the spray hole 11 on the nozzle plate 1 opens. Under the pressure of the spray chamber 21, the ink is sprayed through the spray hole 11. The pressure in the spray chamber 21 drops at the moment of ink spraying. At this time, the flexible gas rod 4 expands rapidly (the time will reach 10 microseconds), so that the pressure drop in the spray chamber 21 is reduced to keep the pressure in the spray chamber 21 relatively constant, and timely compensate for the pressure drop in the spray chamber 21 caused by ink spraying. The ink inlet 23 continuously supplies ink, and the spray hole 11 continuously sprays ink. The pressure in the spray chamber 21 fluctuates when the flexible gas rod 4 sprays ink, so that the pressure of the spray chamber 21 is more stable during continuous ink spraying, and the quality of printing by the spray hole 11 is better. When the moving core 31 extends to block the spray hole 11 and stop ink spraying, energy is stored by the compression of the flexible gas rod 4.

[0024] The compression and expansion of the flexible air rod 4 buffers the change in the pressure in the spray chamber 21 when the ink is sprayed and stopped. When the nozzle is printing, the pressure in the spray chamber 21 remains stable and balanced, and the printing effect of the nozzle is better.

[0025] Since a plurality of block one 22 are arranged on the substrate and a plurality of block two 12 are arranged on the nozzle plate 1, the flexible gas rod 4 is limited by block one 22 and block two 12, and the contact between the ink and the flexible gas rod 4 is ensured at the same time. The pressure of the ink is transmitted to the flexible gas rod 4 in time, making the extension and expansion of the flexible gas rod 4 more stable and reliable, thereby ensuring the stability of the pressure of the spray chamber 21.

[0026] Technical features not described in the present invention can be achieved through or by adopting existing technologies (it can also be achieved if rubber, foam cotton and other materials are used instead of the gas rod), and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A nozzle structure of an inkjet printer, comprising a base plate (2), a driving mechanism (3) arranged on one side of the base plate (2), and a nozzle plate (1) connected to the other side of the base plate (2), characterized in that: A spray chamber (21) for containing ink is formed between the nozzle plate (1) and the base plate (2); a plurality of spray holes (11) connected to the spray chamber (21) are arranged in an array on the nozzle plate (1); the driving mechanism (3) comprises a moving core (31) detachably abutting against the spray hole (11); a flexible gas rod (4) is arranged in the spray chamber (21); a stopper (22) for fixing the flexible gas rod (4) is arranged in the spray chamber (21) on the base plate (2); and an ink inlet (23) connected to the spray chamber (21) is arranged on the base plate (2).

2. The inkjet printer nozzle structure according to claim 1, characterized in that: Two flexible gas rods (4) are provided, and the two flexible gas rods (4) are respectively provided on both sides of the moving core (31), and a plurality of stoppers (22) are arranged in an array between the flexible gas rods (4) and the moving core (31).

3. The inkjet printer nozzle structure according to claim 2, characterized in that: A plurality of stoppers 2 (12) for fixing the position of the flexible gas rod (4) are arranged in an array in the spray chamber (21) on the nozzle plate (1).

4. The inkjet printer nozzle structure according to claim 3, characterized in that: A sealing ring (5) is provided between the nozzle plate (1) and the base plate (2).

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