Z-axis positioning structure of printing nozzle

Abstract

The utility model discloses a Z-axis positioning structure of a printing nozzle, which comprises a lifting plate capable of moving up and down, the lifting plate is slidably limited through a guide rail assembly, and the Z-axis positioning structure is characterized in that a fixing rod is fixedly arranged at the bottom of the lifting plate, a pressing plate is fixedly arranged on one side of the bottom of the fixing rod, the nozzle is arranged on the lower end face of the lifting plate, and the nozzle is arranged on the lower end face of the lifting plate. A groove type laser sensor is fixedly arranged in the lifting plate, a sensor baffle is arranged on the lower side of the lifting plate, a lead screw nut assembly for jacking the lifting plate is arranged at the bottom of the lifting plate, and after the groove type laser sensor is electrically connected with the controller, the motor stops working. And the pressing plate and the printing medium are directly pressed, so that the printing medium can be prevented from moving, and patterns printed on the printing medium can also be prevented from being scratched.

Description

Technical Field

[0001] This utility model relates to the technical field of printing media height detection equipment, specifically a Z-axis positioning structure for a printing nozzle. Background Technology

[0002] In the industry, printers typically use a contact sensor on one side of the printhead. This sensor usually has a roller that directly contacts the printing media to provide printhead positioning information. As the printhead moves, the sensor touches the printing media and moves along with it. During this movement, it may deviate from the intended path or scratch undried ink. Therefore, a Z-axis positioning structure is needed to satisfy both pressure positioning of the printing media and printhead positioning. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a Z-axis positioning structure for a printhead, which can solve the problems in the prior art.

[0004] This utility model is achieved through the following technical solution: A Z-axis positioning structure for a printhead of this utility model includes a lifting plate that moves up and down. The lifting plate is slidably limited by a guide rail assembly. The lifting plate is characterized by having a fixed rod fixedly installed at its bottom, a pressure plate fixedly installed on one side of the bottom of the fixed rod, a printhead installed on the lower end face of the lifting plate, a grooved laser sensor fixedly installed in the lifting plate, a sensor baffle installed on the lower side of the lifting plate, a screw and nut assembly for lifting the lifting plate at its bottom, and a triggering component at its bottom that causes the sensor baffle to trigger the grooved laser sensor and stop the screw and nut assembly after the pressure plate presses the printing medium into place.

[0005] A further technical solution is that the upper front end face of the pressure plate is provided with a flange.

[0006] In a further technical solution, the guide rail assembly includes multiple slide rods, and multiple sliding sleeves are fixedly installed inside the lifting plate. The slide rods pass through the sliding sleeves, and the slide rods are slidably connected to the sliding sleeves.

[0007] A further technical solution includes a triggering component comprising a plurality of bolts fixedly connected to the lower side of the lifting plate by threaded engagement, a sensor baffle slidably disposed on the outer surface of the bolts, and a spring disposed on the outer surface of the bolts, the spring being elastically connected between the lower end face of the sensor baffle and the bottom of the bolts.

[0008] A further technical solution includes a lead screw nut assembly comprising an internally threaded sleeve that is slidably connected to the outer surface of the bolt. The internally threaded sleeve is disposed between the sensor baffle and the lifting plate. The internally threaded sleeve is internally threaded and connected to a threaded shaft, which is driven to rotate by a drive assembly.

[0009] In a further technical solution, the threaded shaft passes through the lifting plate.

[0010] In a further technical solution, a vertical section is provided on the top of the sensor baffle.

[0011] In a further technical solution, the portion of the bolt that connects to the lifting plate is threaded, and the portion of the bolt that slides into the internal threaded sleeve and the sensor baffle is provided with a smooth surface.

[0012] A further technical solution includes a drive component comprising a motor disposed within the body of the machine, the motor being poweredly connected to the threaded shaft, and a controller electrically connected to the grooved laser sensor, the motor being electrically connected to the controller.

[0013] The beneficial effects of this utility model are as follows: First, by setting up a pressure plate, a printhead, a lifting plate, an internal threaded sleeve, a sensor baffle, a grooved laser sensor, a spring, a bolt, a threaded shaft, a motor, and a controller, the function of limiting the contact between the pressure plate and the printing medium, thereby positioning the printhead, is realized. Specifically, the internal threaded sleeve presses the sensor baffle downwards, triggering an electrical signal from the grooved laser sensor. After the grooved laser sensor is electrically connected to the controller, the motor stops working, keeping the printhead and pressure plate in the same position. Because the pressure plate directly presses against the printing medium, it prevents the printing medium from moving and also avoids scratching the printed patterns or text on the printing medium.

[0014] Second, by connecting the bolt to the lifting plate via a threaded connection, the internal threaded sleeve and the sensor baffle are slidably disposed on the outer surface of the bolt. A spring is also disposed on the outer surface of the bolt, so that the spring can play a buffering function. That is, after the print head finishes printing, the controller controls the motor to work, so that the motor drives the threaded shaft to rotate in the opposite direction and reset upward. After the internal threaded sleeve contacts the lifting plate, it lifts the lifting plate upward, thus bringing the equipment to the initial state. This structural design is ingenious and achieves good results. It links the positioning information of the pressure plate and the print head with the start and stop control of the motor, which is highly efficient. Attached Figure Description

[0015] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the Z-axis positioning structure of a printhead according to the present invention, installed in a printer.

[0017] Figure 2 for Figure 1 A schematic diagram of the front structure of the device;

[0018] Figure 3 for Figure 1 A schematic diagram of the Z-axis positioning structure of a printing nozzle;

[0019] Figure 4 for Figure 3 A schematic diagram at point A in the middle;

[0020] Figure 5 for Figure 4 Schematic diagram of the cross-section of the middle structure;

[0021] In the figure, there are: sliding sleeve 11, lifting plate 12, threaded shaft 13, motor 14, fixing rod 15, nozzle 16, pressure plate 17, machine body 18, controller 19, bolt 21, spring 22, internal threaded sleeve 23, sensor baffle 24, grooved laser sensor 25, and slide bar 26. Detailed Implementation

[0022] like Figures 1-5 As shown, this utility model will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The Z-axis positioning structure of a printhead, which aligns with the vertical, horizontal, front-back, and rearward directions of its projection relationship, includes a body 18 on which a printing medium (paper or other material) is placed. A lifting plate 12 that moves vertically is located within the body 18. A controller 19 is also located within the body 18. The lifting plate 12 is slidably limited by a guide rail assembly. The lifting plate 12 is characterized by a fixed rod 15 at its bottom, a pressure plate 17 fixedly mounted on one side of the bottom of the fixed rod 15, and a controller 19. A printhead 16 is located on the lower end face of the lifting plate 12. A recessed laser sensor 25 is fixedly mounted within the lifting plate 12. A sensor baffle 24 is located on the lower side of the lifting plate 12. A screw and nut assembly for lifting the lifting plate 12 is located at the bottom of the lifting plate 12. A triggering assembly at the bottom of the lifting plate 12 causes the sensor baffle 24 to trigger the recessed laser sensor 25, stopping the screw and nut assembly, after the pressure plate 17 presses the printing medium into position. The pressure plate 17 and the printhead 16 move vertically along the Z-axis.

[0023] Advantageously, the upper front end face of the pressure plate 17 is provided with a flange for pressing the printing medium.

[0024] Advantageously, the guide rail assembly includes multiple slide rods 26 fixedly installed inside the body 18, and multiple sliding sleeves 11 fixedly installed inside the lifting plate 12. The slide rods 26 pass through the sliding sleeves 11, and the slide rods 26 and the sliding sleeves 11 are slidably connected.

[0025] A further technical solution includes a triggering component comprising a lifting plate 12 with multiple bolts 21 fixedly connected to the lower side by a threaded connection, a sensor baffle 24 slidably disposed on the outer surface of the bolts 21, and a spring 22 disposed on the outer surface of the bolts 21, the spring 22 being elastically connected between the lower end face of the sensor baffle 24 and the bottom of the bolts 21.

[0026] A further technical solution includes a lead screw nut assembly comprising an internally threaded sleeve 23 that is slidably connected to the outer surface of a bolt 21. The internally threaded sleeve 23 is disposed between a sensor baffle 24 and a lifting plate 12. The internally threaded sleeve 23 is internally threadedly connected to a threaded shaft 13, which is driven to rotate by a drive assembly.

[0027] Advantageously, the grooved laser sensor 25 is electrically connected to the controller 19, and the elastic force of the spring 22 presses the sensor baffle 24 toward the internal threaded sleeve 23. The internal threaded sleeve 23 is provided with a threaded shaft 13 in internal thread engagement. The threaded shaft 13 is driven to rotate by the drive assembly. The threaded shaft 13 passes through the lifting plate 12, and the lifting plate 12 is provided with a through hole to accommodate the threaded shaft 13.

[0028] Advantageously, the sensor baffle 24 has a vertical part at the top, which can extend into the grooved laser sensor 25 to trigger the grooved laser sensor 25.

[0029] Advantageously, the portion of the bolt 21 that connects to the lifting plate 12 is threaded, and the portion of the bolt 21 that slides into the internal threaded sleeve 23 and the sensor baffle 24 is provided with a smooth surface.

[0030] Advantageously, the drive assembly includes a motor 14 disposed within the body 18, the motor 14 being poweredly connected to the threaded shaft 13, and the motor 14 being electrically connected to the controller 19. After the sensor baffle 24 triggers the grooved laser sensor 25, the grooved laser sensor 25 transmits an electrical signal to the controller 19, which then controls the motor 14 to stop working. The controller 19 can also control the motor 14 to work. A display screen can be disposed on the front side of the body 18, and the display screen is electrically connected to the controller 19. Personnel can transmit signals to the controller 19 by operating the display screen to control the motor 14 to work.

[0031] The grooved laser sensor 25 is existing technology and can be of the EE-SX47 / 67 type.

[0032] The working principle of this structure is as follows: Since the lifting plate 12 is downward due to its own weight, after the threaded shaft 13 and the internal threaded sleeve 23 are connected by threaded engagement, if the threaded shaft 13 does not rotate, then the threaded shaft 13 and the internal threaded sleeve 23 remain relatively fixed, and the lifting plate 12 abuts against the upper end face of the internal threaded sleeve 23. At this time, the spring 22 is not in a compressed state.

[0033] The lifting plate 12 is guided to slide up and down by the sliding sleeve 11 and the slide rod 26.

[0034] Personnel can trigger the equipment start command by clicking the display screen, and the controller 19 can control the motor 14 to run. The motor 14 drives the threaded shaft 13 to rotate. Since the internal threaded sleeve 23 is limited to rotate by the spring 22, the internal threaded sleeve 23 can move downward along the threaded shaft 13. Due to gravity, the lifting plate 12 keeps in close contact with the upper surface of the internal threaded sleeve 23.

[0035] After the lifting plate 12 moves downward, it drives the printhead 16 and the pressure plate 17 to move downward. After the pressure plate 17 contacts the upper surface of the printing medium, it is limited and will not continue to move downward. Therefore, the pressure plate 17, the printhead 16 and the lifting plate 12 will not move downward anymore.

[0036] Since the threaded shaft 13 is still driven by the motor 14, the internal threaded sleeve 23 continues to move downward along the threaded shaft 13. When the lifting plate 12 can no longer move downward, the internal threaded sleeve 23 moves downward relative to the lifting plate 12. The internal threaded sleeve 23 presses the sensor baffle 24 downward, compressing the spring 22. The vertical plate of the sensor baffle 24 extends into the sensing groove of the grooved laser sensor 25, triggering the electrical signal of the grooved laser sensor 25. The grooved laser sensor 25 feeds back the electrical signal to the controller 19, causing the controller 19 to control the motor 14 to stop working.

[0037] Through the above process, the function of preventing the pressure plate 17 from moving further downward after it is pressed against the upper surface of the printing medium is achieved. Since both the pressure plate 17 and the printhead 16 are connected to the lifting plate 12, the function of positioning the printhead 16 is achieved after the pressure plate 17 stops moving and is positioned after it comes into contact with the printing medium.

[0038] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the protection scope of this utility model; therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A Z-axis positioning structure of a print head, comprising an up-and-down moving lifting plate (12) which is slidingly positioned by a guide rail assembly, characterized in that, A pressure plate (17) is fixedly installed at the bottom of the lifting plate (12). A nozzle (16) is installed on the lower end face of the lifting plate (12). A grooved laser sensor (25) is fixedly installed in the lifting plate (12). A sensor baffle (24) is installed on the lower side of the lifting plate (12). A screw and nut assembly for lifting the lifting plate (12) is installed at the bottom of the lifting plate (12). A triggering component is installed at the bottom of the lifting plate (12) to cause the sensor baffle (24) to trigger the grooved laser sensor (25) and stop the screw and nut assembly from working after the pressure plate (17) presses the printing medium into place.

2. The Z-axis positioning structure of a print head according to claim 1, wherein: The upper front end face of the pressure plate (17) is provided with a flange.

3. The Z-axis positioning structure of a print head according to claim 1, wherein: The guide rail assembly includes multiple slide rods (26), and multiple sliding sleeves (11) are fixedly installed inside the lifting plate (12). The slide rods (26) pass through the sliding sleeves (11), and the slide rods (26) and the sliding sleeves (11) are slidably connected.

4. The Z-axis positioning structure of a print head according to claim 1, wherein: The triggering component includes a plurality of bolts (21) that are threadedly connected and fixed on the lower side of the lifting plate (12). A sensor baffle (24) is slidably provided on the outer surface of the bolts (21). A spring (22) is provided on the outer surface of the bolts (21). The spring (22) is elastically connected between the lower end face of the sensor baffle (24) and the bottom of the bolts (21).

5. The Z-axis positioning structure of a print head according to claim 4, wherein: The lead screw nut assembly includes an internally threaded sleeve (23) that is slidably connected to the outer surface of the bolt (21). The internally threaded sleeve (23) is located between the sensor baffle (24) and the lifting plate (12). The internally threaded sleeve (23) is internally threaded and connected to a threaded shaft (13). The threaded shaft (13) is driven to rotate by a drive assembly.

6. The Z-axis positioning structure of a print head according to claim 5, wherein: The threaded shaft (13) passes through the lifting plate (12).

7. The Z-axis positioning structure of a print head according to claim 1, wherein: The sensor baffle (24) has a vertical section at its top.

8. The Z-axis positioning structure of a print head according to claim 5, wherein: The portion of the bolt (21) connected to the lifting plate (12) is threaded, and the portion of the bolt (21) that is slidably connected to the internal threaded sleeve (23) and the sensor baffle (24) is provided with a smooth surface.

9. The Z-axis positioning structure of a print head according to claim 5, wherein: The drive assembly includes a motor (14) disposed in the body (18), the motor (14) being poweredly connected to the threaded shaft (13), and a controller (19) being electrically connected to the grooved laser sensor (25), and the motor (14) being electrically connected to the controller (19).

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