Printing head inlet and outlet mechanism in thermal transfer printing identification equipment

Abstract

The utility model discloses a printing head inlet and outlet mechanism in thermal transfer printing identification equipment, which comprises a rack and a printing head inlet and outlet mechanism, a linear sliding rail, a linear sliding block, a linear motion mechanism, a linear brushless motor, a direct-current brushless motor driving circuit board and a main control board are included, the linear brushless motor drives a printing head moving bracket through the linear motion mechanism to linearly move along the linear sliding rail through the linear sliding block, and in-out of a printing head is achieved. According to the utility model, the direct-current brushless motor is driven and position feedback is performed in real time, so that the printing head is more intelligent, the stretching-out speed of the printing head during printing can be adjusted by adjusting the rotation pulse frequency of the direct-current brushless motor, the pressure of the printing head during printing can be adjusted, and the position state of the printing head can be monitored; and on the whole, the structure is simpler, the control is more accurate, and the performance is more reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal transfer marking equipment, and in particular to a printhead infeed mechanism in thermal transfer marking equipment. Background Technology

[0002] Current thermal transfer marking equipment primarily uses solenoid valves and cylinders or electromagnets to control the extension and retraction of the print head during the printing process. However, the uncertainty of air supply on the production floor, and the non-linear relationship between distance and thrust when the electromagnet is energized, cause certain inconveniences in installation, debugging, and daily use on the production line. Utility Model Content

[0003] The technical problem this utility model aims to solve is to address the issues in existing thermal transfer marking equipment that use solenoid valves and cylinders or electromagnets to push the print head in and out, which suffer from uncertain air supply, nonlinear characteristics of the electromagnet's thrust and pushing distance, and inability to automatically position the print head during movement. This utility model provides a print head in-and-out mechanism for thermal transfer marking equipment that is more intelligent, can monitor position status, and has a simpler overall structure and more precise control.

[0004] To achieve the above-mentioned objective, the print head infeed mechanism in the thermal transfer marking device of this invention includes:

[0005] frame;

[0006] A linear slide rail is mounted on the frame, which guides the print head in and out.

[0007] A linear slider is mounted on a printhead moving bracket, the linear slider being slidably configured on the linear guide rail;

[0008] A linear motion mechanism is provided, wherein the power output end of the linear motion mechanism is connected to the printhead moving bracket drive, driving the printhead moving bracket to move linearly along the linear slide rail via the linear slider, thereby realizing the entry and exit of the printhead;

[0009] A linear brushless motor is mounted on the frame, and the power drive end of the linear brushless motor is driven to be connected to the power input end of the linear motion mechanism to drive the linear motion mechanism to work.

[0010] A DC brushless motor drive circuit board is installed at the tail end of the linear brushless motor. It is used to drive the DC brushless motor to rotate, control the direction, adjust the speed and torque, and output a position feedback signal in real time according to the rotation angle of the DC brushless motor.

[0011] A main control board has a motor control circuit for controlling the direction, speed and torque of a brushless DC motor and receiving the position feedback signal of the brushless DC motor. The motor control circuit is electrically connected to the brushless DC motor drive circuit board and is used to drive the brushless DC motor through the brushless DC motor drive circuit board.

[0012] In a preferred embodiment of this utility model, the linear motion mechanism includes a reduction gearbox, a gear, and a rack. The power input end of the reduction gearbox is driven by the power drive end of the linear brushless motor, and the power output end of the reduction gearbox is driven by the gear, which serves as the power input end of the linear motion mechanism. The gear is driven to rotate, and the rack is mounted on the printhead moving bracket. The rotating gear meshes with the rack, driving the rack to perform linear motion, thus converting the rotational torque output of the DC brushless motor into the vertical displacement output of the printhead.

[0013] In a preferred embodiment of this utility model, the motor control circuit of the main control board consists of a CPU, an FPGA, RAM, and peripheral circuits.

[0014] The working principle of this utility model is as follows:

[0015] Based on printing requirements, when the printhead needs to be extended for printing, the main control board sends an extension direction signal to its motor control circuit. Simultaneously, it sends a pulse signal indicating the DC brushless motor's rotation speed, corresponding to a set thrust value. The enhanced torque of the DC brushless motor is applied to the gears via a reduction gearbox, and through meshing with a rack and pinion, the motor's rotation is converted into the up-and-down movement of a linear slider along a linear guide rail, thus pushing the printhead in and out. During the printhead extension process, the return position signal of the DC brushless motor is monitored in real time. After printing is complete, the main control board sends a retraction direction signal and a rotation pulse signal for the DC brushless motor, monitoring the motor's position feedback (i.e., the printhead position information). Once the preset position is reached, the transmission of the DC brushless motor rotation pulse stops, and the motor stops rotating.

[0016] By adopting the above technical solution, this utility model is more intelligent by using a DC brushless motor to drive it and providing real-time position feedback. It can not only adjust the printhead protrusion speed by adjusting the rotation pulse frequency of the DC brushless motor, but also adjust the printhead pressure and monitor the printhead position. Overall, this makes the structure simpler, the control more precise, and the performance more reliable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the DC brushless geared motor mechanism of this utility model. Detailed Implementation

[0018] See Figure 1 The printhead infeed / outfeed mechanism in the thermal transfer marking device shown in the figure includes: a frame 100, a linear slide rail 200, a linear slider 300, a reduction gearbox 400, a gear 500, a rack 600, a linear brushless motor 700, a DC brushless motor drive circuit board 800, and a main control board 900. The reduction gearbox 400, gear 500, and rack 600 constitute the aforementioned linear motion mechanism.

[0019] A linear guide rail 200 is mounted on the frame 100, and this linear guide rail 200 guides the printhead 1000 in and out. A linear slider 300 is mounted on the printhead moving bracket (not shown in the figure) and slidably configured on the linear guide rail 200. The linear slider 300 drives the printhead moving bracket to move linearly along the linear guide rail 200, realizing the entry and exit of the printhead 900.

[0020] A linear brushless motor 700 is mounted on the frame 100 near the printhead moving bracket. The power drive end of the linear brushless motor 700 is connected to the gear 500, driving the gear 500 to rotate. A rack 600 is mounted on the printhead moving bracket. The rotating gear 500 meshes with the rack 600, driving the rack 600 to perform linear motion, thus converting the rotational torque output of the DC brushless motor 700 into the vertical displacement output of the printhead 1000.

[0021] The DC brushless motor drive circuit board 800 is installed at the tail end of the linear brushless motor 700. It is used to drive the DC brushless motor 700 to rotate, control the direction, adjust the speed and torque, and output a position feedback signal in real time according to the rotation angle of the DC brushless motor 700.

[0022] The main control board 900 has a motor control circuit for controlling the direction, speed and torque of the brushless DC motor 700 and receiving the position feedback signal of the brushless DC motor 700. The motor control circuit consists of a CPU, FPGA, RAM and peripheral circuits.

[0023] The motor control circuit is electrically connected to the DC brushless motor drive circuit board 800, and the DC brushless motor drive circuit board 800 is used to drive the DC brushless motor 700.

Claims

1. A printhead access mechanism in a heat transfer labeling apparatus, comprising: The rack is characterized in that it further comprises: a linear slide rail mounted on the rack, which guides the printing head in and out; a linear slide block mounted on the printing head moving bracket, which is slidably arranged on the linear slide rail; a linear motion mechanism, a power output end of which is drivingly connected with the printing head moving bracket to drive the printing head moving bracket to move linearly along the linear slide rail through the linear slide block, thereby realizing the in-and-out movement of the printing head; a linear brushless motor mounted on the rack, a power driving end of which is drivingly connected with a power input end of the linear motion mechanism to drive the linear motion mechanism to work; a linear brushless motor driving circuit board mounted at the tail end of the linear brushless motor, which is used to drive the linear brushless motor to rotate, control the direction, adjust the rotating speed and torque, and output a real-time position feedback signal according to the rotating angle of the linear brushless motor; a main control board, which has a motor control circuit for controlling the direction, rotating speed and torque of the linear brushless motor and receiving the position feedback signal of the linear brushless motor, the motor control circuit being electrically connected with the linear brushless motor driving circuit board to drive the linear brushless motor through the linear brushless motor driving circuit board.

2. A printhead access mechanism in a heat transfer marking apparatus as defined in claim 1, wherein, The linear motion mechanism comprises a reduction gear box, a gear and a rack; a power input end of the reduction gear box is drivingly connected with a power driving end of the linear brushless motor, a power output end of the reduction gear box is drivingly connected with the gear as the power input end of the linear motion mechanism to drive the gear to rotate, the rack is mounted on the printing head moving bracket, the rotating gear is engaged with the rack to drive the rack to move linearly, and the rotating torque output of the linear brushless motor is converted into the up-and-down displacement output of the printing head.

3. The printhead access mechanism in a heat transfer labeling apparatus of claim 1, wherein, The motor control circuit of the main control board is composed of a CPU, a FPGA, a RAM and a peripheral circuit.

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