Temperature control powder feeding roller

Abstract

The utility model relates to the technical field of printing equipment, in particular to a temperature control powder feeding roller which comprises a powder feeding roller body, the powder feeding roller body is installed in a printer, a middle shaft is fixedly connected in the powder feeding roller body, rotating rings are connected to the left end and the right end of the middle shaft in a rotating mode, a plurality of fan blades are connected between the two rotating rings, a motor is installed in the powder feeding roller body, and the motor is connected with the middle shaft in a rotating mode. An output shaft of the motor is connected with a gear, the rotating rings are connected with gear rings, the gear rings are meshed with the gear, a heating rod is installed in the middle of the middle shaft, the rotating rings are located at the left end and the right end of the heating rod, and the left end and the right end in the powder feeding roller are each provided with a ventilation assembly used for ventilating the interior of the powder feeding roller. The temperature of the powder feeding roller is monitored in real time through the temperature detector, the heating rod and the fan blades are linked, the temperature detector triggers the heating rod to emit heat at low temperature, the temperature detector triggers an alarm and pauses printing at high temperature, the motor drives the fan blades to rotate at high speed to accelerate internal and external airflow exchange, it is ensured that the powder feeding roller stably works in a certain temperature range, and the printing quality continuity is improved.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a temperature-controlled powder feeding roller. Background Technology

[0002] As a core device in modern office and information processing, the image quality and operational stability of a printer directly depend on the performance of its internal key components. The toner delivery roller is a crucial component of the laser printer's developing system. Its core function is to evenly transport toner from the toner cartridge to the surface of the developing roller, and through friction with the developing roller, to charge the toner, ultimately achieving precise transfer of the toner to the photosensitive drum. This process places stringent requirements on the uniformity of the toner delivery roller's material, surface roughness, and operational stability; any slight deviation can lead to quality problems such as color differences, toner leakage, or background graying.

[0003] Existing toner delivery rollers are mostly made of metal or conductive rubber, with their design focusing on optimizing structural strength and basic conductivity. However, in actual use, the performance of the toner delivery roller is significantly affected by ambient temperature and operating temperature rise: on the one hand, during long-term printer operation, the continuous friction between the toner delivery roller and the developing roller can cause local temperature rise, leading to aging and deformation of the rubber material or thermal expansion of metal parts, resulting in uneven toner delivery; on the other hand, in low-temperature environments, such as during cold start-up, the hardness of the rubber material increases and its conductivity decreases, which can easily lead to toner agglomeration or increased transport resistance, thereby causing toner supply interruption or abnormal charge distribution.

[0004] In summary, existing toner rollers suffer from material performance degradation under high-temperature conditions, leading to decreased toner delivery stability and affecting continuous printing quality; in low-temperature environments, their initial conductivity and flexibility are insufficient, easily causing toner supply failure; and passive designs cannot achieve dynamic matching between temperature and toner delivery efficiency, limiting the printer's applicability in a wide temperature range. Utility Model Content

[0005] To overcome the shortcomings of insufficient temperature range adaptability and lack of dynamic control, this utility model provides a temperature-controlled powder feeding roller, which aims to solve the above-mentioned shortcomings.

[0006] A temperature-controlled toner delivery roller includes a toner delivery roller installed inside a printer. A central shaft is fixedly connected inside the toner delivery roller, and rotating rings are rotatably connected to the left and right ends of the central shaft. Several fan blades are connected between two rotating rings. A motor is installed inside the toner delivery roller, and a gear is connected to the output shaft of the motor. A gear ring is connected to the rotating ring and meshes with the gear. A heating rod is installed in the middle of the central shaft, and the rotating rings are located at the left and right ends of the heating rod. Ventilation components for ventilation inside the toner delivery roller are provided at both the left and right ends.

[0007] As a further preferred embodiment, the ventilation assembly includes a fixed door, which is connected to the left and right ends of the powder feeding roller. A rotating door is rotatably connected to the side of the fixed door facing the middle of the powder feeding roller. Both the fixed door and the rotating door have fan-shaped through holes and are staggered. A handwheel is connected to the side of the rotating door facing the port of the powder feeding roller. The handwheel passes through the fixed door and is rotatably connected to it. A torsion spring is fitted on the handwheel. One end of the torsion spring is fixedly connected to the fixed door, and the other end is connected to the handwheel.

[0008] As a further preferred embodiment, the handwheel sleeve is provided with an anti-slip sleeve.

[0009] As a further preferred embodiment, the powder feeding roller port is sealed with a protective cover.

[0010] As a further preferred embodiment, a filter screen is connected to the through hole of the fixed door.

[0011] As a further preferred embodiment, a temperature sensor is embedded in the side wall of the powder feeding roller.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The temperature of the toner delivery roller is monitored in real time by a temperature sensor, which is linked to the heating rod and the fan blade. When the temperature is low, the temperature sensor triggers the heating rod to heat up. When the temperature is high, the temperature sensor triggers an alarm and stops printing. The motor drives the fan blade to rotate at high speed to accelerate the exchange of airflow inside and outside the machine, ensuring that the toner delivery roller works stably within a certain temperature range and improving the continuity of printing quality.

[0014] 2. The temperature sensor is electrically connected to the printer's main control system. Low and high temperature thresholds are preset to achieve automatic temperature signal feedback. When the temperature is abnormal, the main control system automatically starts and stops the heating rod, motor and other components. In the ventilation component, the torsion spring deforms with the rotation of the handwheel. After being released, the rotating door automatically resets to avoid the ventilation opening being open for a long time. This achieves active control of temperature and powder delivery efficiency, improving the intelligence and reliability of equipment operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure of the rotating door, fixed door, and handwheel of this utility model.

[0018] Figure 4 This is a schematic diagram of the connection structure of the powder feeding roller, the central shaft, and the heating rod of this utility model.

[0019] In the attached diagram, the following labels are used: 1-Powder feeding roller, 101-Central shaft, 2-Rotating ring, 3-Fan blade, 4-Gear ring, 5-Gear, 6-Motor, 7-Heating rod, 8-Fixed door, 9-Rotating door, 10-Handwheel, 11-Torsion spring, 12-Anti-slip sleeve, 13-Protective cover, 14-Filter screen, 15-Temperature sensor. Detailed Implementation

[0020] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0021] Example: A temperature-controlled powder feeding roller, such as Figures 1-4 As shown, the device includes a toner delivery roller 1, a central shaft 101, a rotating ring 2, fan blades 3, a gear ring 4, a gear 5, a motor 6, a heating rod 7, and a ventilation assembly. The toner delivery roller 1 is installed inside the printer. The central shaft 101 is fixedly connected inside the toner delivery roller 1. The rotating rings 2 are rotatably connected to the left and right ends of the central shaft 101. Several fan blades 3 are connected between the two rotating rings 2. The motor 6 is installed inside the toner delivery roller 1. The output shaft of the motor 6 is connected to the gear 5. The rotating rings 2 are connected to the gear ring 4, which meshes with the gear 5. The heating rod 7 is installed in the middle of the central shaft 101. The rotating rings 2 are located at the left and right ends of the heating rod 7. Ventilation assemblies for ventilation inside the toner delivery roller 1 are provided at both the left and right ends of the toner delivery roller 1.

[0022] like Figure 2 and Figure 3 As shown, the ventilation assembly includes a fixed door 8, a rotating door 9, a handwheel 10, and a torsion spring 11. The fixed door 8 is connected to the left and right ends of the powder feeding roller 1 respectively. The rotating door 9 is rotatably connected to the side of the fixed door 8 facing the middle of the powder feeding roller 1. Both the fixed door 8 and the rotating door 9 have fan-shaped through holes and are staggered. The handwheel 10 is connected to the side of the rotating door 9 facing the port of the powder feeding roller 1. The handwheel 10 passes through the fixed door 8 and is rotatably connected to it. The handwheel 10 is fitted with a torsion spring 11. One end of the torsion spring 11 is fixedly connected to the fixed door 8, and the other end is connected to the handwheel 10. The torsion spring 11 deforms when the handwheel 10 rotates. After being released, the rotating door 9 is automatically reset, avoiding the ventilation opening being open for a long time due to human negligence.

[0023] like Figure 2 As shown, it also includes an anti-slip sleeve 12. The handwheel 10 is fitted with an anti-slip sleeve 12. The anti-slip sleeve 12 is made of a high friction coefficient material to increase the contact friction between the handwheel 10 and the operator's hand.

[0024] like Figure 1 and Figure 2 As shown, it also includes a protective cover 13. The protective cover 13 is sealed to the port of the powder feeding roller 1. The protective cover 13 is sealed to the port of the powder feeding roller 1 by a snap or thread, and is easy to disassemble.

[0025] like Figure 2 As shown, it also includes a filter screen 14. The filter screen 14 is connected to the through hole of the fixed door 8. The filter screen 14 is made of fine metal mesh or polymer material, and the pore size is smaller than the diameter of the toner particles.

[0026] like Figure 2 As shown, it also includes a temperature sensor 15. The temperature sensor 15 is embedded in the side wall of the powder feeding roller 1. The temperature sensor is preset with a low temperature start threshold and a high temperature alarm threshold, which are set to 15℃ and 60℃ respectively. It is electrically connected to the printer's main control system and provides real-time temperature feedback. When the temperature exceeds the safe range, the main control system triggers an alarm and suspends the printing task.

[0027] When the printer is in a low-temperature environment, after the operator turns on the device, the temperature sensor 15, built into the side wall of the toner roller 1, immediately detects the surface temperature of the roller. If the detected temperature is lower than the low-temperature start-up threshold, the system automatically activates the heating rod 7 and the motor 6: the heating rod 7 releases heat after being powered on, and at the same time, the motor 6 drives the output shaft to rotate the gear 5. The gear 5 meshes with the gear ring 4, driving the rotating ring 2 to rotate at a low speed on the central shaft 101, thereby driving the multiple fan blades 3 to rotate and stir the airflow inside the toner roller 1, so that the heat generated by the heating rod 7 is evenly diffused to all areas of the toner roller 1, avoiding local overheating or uneven temperature. As the heat continues to transfer, the overall temperature of the toner roller 1 gradually rises. When the temperature sensor 15 reports that the temperature exceeds the low-temperature start-up threshold, the system automatically shuts off the heating rod 7 and the motor 6. At this time, the toner flowability on the surface of the toner roller 1 is significantly improved, and the charge distribution stability is enhanced, ensuring that the toner can be evenly adsorbed onto the developing roller after entering the printing stage, avoiding toner supply interruption or printing patch problems caused by low temperature. Low-temperature situations are more common, and continuous printing is less so.

[0028] When the printer runs for an extended period, causing the temperature of the toner roller 1 to exceed the high-temperature alarm threshold, the temperature sensor 15 triggers a high-temperature alarm and pauses the printing task, prompting the operator to perform cooling measures. The operator must first remove the side covers of the printer and remove the protective cover 13 sealing the port of the toner roller 1. Then, manually turn the handwheel 10: the handwheel 10 drives the rotating door 9 to rotate around the fixed door 8, gradually aligning the originally misaligned fan-shaped through holes, ultimately opening up the internal spaces at both ends of the toner roller 1 to form a straight airflow channel. After completing this operation, restart the motor 6. The gear 5 drives the rotating ring 2 and fan blades 3 to rotate at high speed through the gear ring 4, accelerating the exchange of hot air inside the toner roller 1 with cold air outside. The forced airflow generated by the fan blades 3 can quickly reduce the roller temperature, while the filter 14 effectively blocks external dust or toner particles from entering the interior. During the cooling process, the torsion spring 11 undergoes torsional deformation as the handwheel 10 rotates. When the operator releases the handwheel 10, the torsion spring 11 returns to its original deformation, causing the rotating door 9 to reset, preventing the ventilation opening from remaining open for an extended period due to human negligence. Once the temperature sensor 15 confirms that the temperature has dropped to a safe range, turn off the motor 6 and reinstall the protective cover 13 and cover plate. At this time, the internal temperature of the powder feeding roller 1 meets the conditions for printing again, and the equipment can resume normal operation.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature-controlled powder feeding roller, characterized in that, The printer includes a powder feeding roller (1), which is installed inside the printer. A central shaft (101) is fixedly connected inside the powder feeding roller (1). Rotary rings (2) are rotatably connected to the left and right ends of the central shaft (101). Several fan blades (3) are connected between the two rotary rings (2). A motor (6) is installed inside the powder feeding roller (1). A gear (5) is connected to the output shaft of the motor (6). A gear ring (4) is connected to the rotary ring (2). The gear ring (4) meshes with the gear (5). A heating rod (7) is installed in the middle of the central shaft (101). The rotary rings (2) are located at the left and right ends of the heating rod (7). Ventilation components for ventilation inside the powder feeding roller (1) are provided at both the left and right ends of the powder feeding roller (1).

2. The temperature-controlled powder feeding roller as described in claim 1, characterized in that, The ventilation assembly includes a fixed door (8), which is connected to the left and right ends of the powder feeding roller (1). A rotating door (9) is rotatably connected to the side of the fixed door (8) facing the middle of the powder feeding roller (1). Both the fixed door (8) and the rotating door (9) have fan-shaped through holes. A handwheel (10) is connected to the side of the rotating door (9) facing the port of the powder feeding roller (1). The handwheel (10) passes through the fixed door (8) and is rotatably connected to it. A torsion spring (11) is sleeved on the handwheel (10). One end of the torsion spring (11) is fixedly connected to the fixed door (8), and the other end is connected to the handwheel (10).

3. The temperature-controlled powder feeding roller as described in claim 2, characterized in that, The handwheel (10) is fitted with an anti-slip sleeve (12).

4. A temperature-controlled powder feeding roller as described in claim 3, characterized in that, The powder feeding roller (1) is sealed with a protective cover (13) at its port.

5. A temperature-controlled powder feeding roller as described in claim 4, characterized in that, A filter screen (14) is connected to the through hole of the fixed door (8).

6. A temperature-controlled powder feeding roller as described in claim 5, characterized in that, A temperature sensor (15) is embedded in the side wall of the powder feeding roller (1).

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