Structure for reducing torsional load

Abstract

The application provides a structure for reducing torsional load, comprising a body, a rotating part and a sealing part; the body has a first mating surface; the rotating part has a second mating surface; the rotating part is installed on the body, and the second mating surface is rotationally connected with the first mating surface; the sealing part is arranged between the first mating surface and the second mating surface, and the first mating surface and the second mating surface are in interference fit; the first mating surface comprises a first part and a second part along a first direction, the first direction is parallel to the central axis of the rotating part; the first part and the second part are both curved surfaces, a plurality of grooves are arranged on the first part at intervals, and the plurality of grooves are distributed along the circumferential direction of the first part. One technical effect of the application is that the design is reasonable, which can effectively reduce the torsional load and better ensure the sealing between the body and the rotating part.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of printers, and particularly relates to a structure for reducing torsional load. BACKGROUND

[0002] A laser printer is one of the most widely used computer external output devices at present, which outputs characters or images through the interaction of light, electricity and heat according to the physical and chemical principles. The basic process can be divided into seven steps of charging, exposure, development, transfer, fixation, cleaning and electricity elimination. First, the surface of a photosensitive drum is uniformly charged by a charging roller. A laser scanner emits a modulated laser containing image information to the photosensitive drum to form an electrostatic latent image corresponding to the image to be copied on the surface of the photosensitive drum. At the same time, the developer roller rotates, and the carbon powder between the developer roller and the powder knife is charged due to the rotation friction, and the charged carbon powder is uniformly distributed on the developer roller due to the pressure of the powder knife. The developer roller rotates to the part in contact with the OPC (photosensitive drum), and the charged carbon powder is transferred to the surface of the photosensitive drum due to the electric field force, so that the electrostatic latent image is converted into a visible image. With the rotation of the photosensitive drum and the application of a positive voltage to the back of the paper recording medium by the transfer roller, the visible image formed by the carbon powder is attracted to the paper recording medium. Subsequently, the heating roller and the pressure roller form a fixing assembly, and under the action of heat and pressure, the carbon powder particles melt into the fibers of the recording medium, so that the visible image formed by the carbon powder is completely solidified on the recording medium.

[0003] At present, in the design process of the selenium drum powder box, the sealing design between some important parts is usually required, but with the use of the selenium drum powder box, the sealing is usually not strict, which seriously affects the function of the selenium drum powder box and leads to poor user experience. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art, and provides a new technical solution of a structure for reducing torsional load.

[0005] According to one aspect of the present application, a structure for reducing torsional load applied to a laser printer is provided, which comprises:

[0006] a body, the body having a first matching surface;

[0007] a rotating part, the rotating part having a second matching surface; the rotating part is installed on the body, and the second matching surface is rotationally connected with the first matching surface;

[0008] a sealing part, the sealing part is arranged between the first matching surface and the second matching surface, and the first matching surface and the second matching surface are interference-fitted;

[0009] The first mating surface includes a first part and a second part along a first direction, and the first direction is parallel to the central axis of the rotating part.

[0010] Both the first part and the second part are curved surfaces, and the first part is located on one side of the second part. Multiple grooves are provided at intervals on the first part, and the multiple grooves are distributed along the circumference of the first part.

[0011] Optionally, the groove is elongated.

[0012] Optionally, the groove is inclined relative to the first direction, and the groove forms a preset angle with respect to the first direction, and the plurality of grooves form a threaded structure.

[0013] Optionally, the preset included angle ranges from 30° to 60°.

[0014] Optionally, the preset included angle can be in the range of 45°.

[0015] Optionally, both the first part and the second part are arc surfaces, and the plurality of grooves are arranged in parallel.

[0016] Optionally, the structure for reducing torque load further includes a powder discharge blade, wherein the rotating part is a developing roller, the powder discharge blade is fixedly disposed on the body, and the powder discharge blade is in contact with the developing roller;

[0017] The body, the powder dispensing blade, and the developing roller together constitute a powder hopper for filling toner; the second part is located on the side of the first part away from the powder hopper, and one end of the groove is connected to the powder hopper.

[0018] Optionally, the developing roller rotates in a first direction;

[0019] The toner filling the space between the first mating surface and the second mating surface moves toward the toner hopper under the action of the groove.

[0020] Optionally, the rotating part has two second mating surfaces, which are located at both ends of the rotating part.

[0021] Optionally, the sealant is a sponge felt.

[0022] One technical advantage of this invention is that:

[0023] In the embodiment of the present application, the body has a first mating surface, the rotating part has a second mating surface, the second mating surface is rotationally connected with the first mating surface; the sealing part is arranged between the first mating surface and the second mating surface, and the first mating surface and the second mating surface are in interference fit. The first mating surface includes a first part and a second part along a first direction, the first direction is parallel to the central axis of the rotating part; the first part and the second part are both curved surfaces, and the first part is located on one side of the second part, a plurality of grooves are arranged on the first part in intervals, and the plurality of grooves are distributed along the circumferential direction of the first part.

[0024] Therefore, the plurality of grooves arranged on the first part in intervals can significantly reduce the area of the acting surface of the interference fit between the first mating surface and the second mating surface, thereby better reducing the pressure of the rotating part on the body during rotation, and greatly reducing the torque load, thereby being able to protect the body and the rotating part, and helping to prolong the service life of the structure for reducing the torque load. On the other hand, the sealing part is arranged between the first mating surface and the second mating surface, and the first mating surface and the second mating surface are in interference fit, the second part can be tightly on the second mating surface through the sealing part, thereby being able to effectively prevent the medium stored in the body from overflowing from between the first part and the second mating surface, and thereby being able to better ensure the sealing effect between the first mating surface and the second mating surface. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a structural schematic diagram of a structure for reducing torque load according to an embodiment of the present application;

[0026] Figure 2 FIG. 2 is a structural schematic diagram of a first part and a second part of a structure for reducing torque load according to an embodiment of the present application;

[0027] Figure 3 FIG. 3 is a detail enlarged view of position A in FIG. 2. Figure 2

[0028] In the figure: 1, body; 2, rotating part; 3, sealing part; 11, first part; 12, second part; 13, groove; 4, powder outlet knife. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0030] ​The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] like Figures 1 to 3 As shown, this application provides a structure for reducing torque load, which is applied to a laser printer and can effectively reduce the torque load between two connected components.

[0035] Specifically, the structure for reducing torsional load includes a body 1, a rotating part 2, and a sealing part 3. The rotating part 2 is capable of rotating relative to the body 1, and the sealing part 3 can effectively seal the body 1 and the rotating part 2.

[0036] Further specifically, the body 1 has a first mating surface; the rotating part 2 has a second mating surface; the rotating part 2 is installed on the body 1, and the second mating surface is rotationally connected with the first mating surface.

[0037] The sealing part 3 is arranged between the first mating surface and the second mating surface, and the first mating surface and the second mating surface are in interference fit. The sealing part 3 is extruded by the body 1 and the rotating part 2, so that the sealing effect between the body 1 and the rotating part 2 can be ensured even if the rotating part 2 rotates relative to the body 1.

[0038] The first mating surface includes a first part 11 and a second part 12 along a first direction, and the first direction is parallel to the central axis of the rotating part 2.

[0039] The first part 11 and the second part 12 are both curved surfaces, and the first part 11 is located on one side of the second part 12. A plurality of grooves 13 are arranged on the first part 11 in a circumferential direction of the first part 11. Because the grooves 13 are arranged on the first part 11, the area of the surface of the interference fit between the first mating surface and the second mating surface can be greatly reduced, thereby reducing the torque load. Because the second part 12 is not provided with the grooves 13, the second part 12 is tightly attached to the second mating surface by the sealing part 3, thereby ensuring the sealing between the body 1 and the rotating part 2. Further, the first part 11 and the second part 12 increase the supporting area between the body 1 and the rotating part 2, thereby improving the overall stability of the structure for reducing the torque load.

[0040] In the embodiment, the body 1 has a first mating surface, the rotating part 2 has a second mating surface, the second mating surface is rotationally connected with the first mating surface, and a sealing part 3 is arranged between the first mating surface and the second mating surface, and the first mating surface and the second mating surface are in interference fit. The first mating surface includes a first part 11 and a second part 12 along a first direction, and the first direction is parallel to the central axis of the rotating part 2. The first part 11 and the second part 12 are both curved surfaces, and the first part 11 is located on one side of the second part 12. A plurality of grooves 13 are arranged on the first part 11 in a circumferential direction of the first part 11.

[0041] Therefore, the plurality of grooves 13 arranged on the first part 11 can significantly reduce the area of the action surface of the interference fit between the first fitting surface and the second fitting surface, thereby reducing the pressure of the rotating part 2 on the body 1 during rotation, and greatly reducing the torque load, so as to protect the body 1 and the rotating part 2, and help to prolong the service life of the structure with reduced torque load. On the other hand, the sealing part 3 is arranged between the first fitting surface and the second fitting surface, and the first fitting surface and the second fitting surface are interference fitted, and at the same time, the first part 11 can be tightly arranged on the second fitting surface through the sealing part 3, thereby effectively preventing the medium stored in the body 1 from overflowing between the first part 11 and the second fitting surface, and thereby better ensuring the sealing effect between the first fitting surface and the second fitting surface.

[0042] Optionally, the groove 13 is in a strip shape. The groove 13 in a strip shape can effectively reduce the area of the action surface of the interference fit between the first fitting surface and the second fitting surface, and help to reduce the pressure of the rotating part 2 on the body 1 during rotation, thereby greatly reducing the torque load.

[0043] Optionally, the groove 13 is arranged obliquely relative to the first direction, and the groove 13 forms a preset included angle relative to the first direction, and a plurality of the grooves 13 form a threaded structure.

[0044] In the above embodiment, the groove 13 is arranged obliquely, and a plurality of the grooves 13 form a threaded structure, which helps the medium between the first part 11 and the second fitting surface during the rotation of the rotating part 2 relative to the body 1 to move towards the inside of the body 1 under the action of the threaded structure, thereby better ensuring the good sealing effect between the body 1 and the rotating part 2, and effectively preventing the stored medium in the body 1 from overflowing between the rotating part 2 and the body 1.

[0045] Optionally, the preset included angle is in the range of 30°-60°. Further, the preset included angle is 45°. During the rotation of the rotating part 2 relative to the body 1, the medium can be effectively pushed to move towards the inside of the body 1, preventing the stored medium in the body 1 from overflowing between the rotating part 2 and the body 1, and ensuring better sealing between the body 1 and the rotating part 2.

[0046] Optionally, the first part 11 and the second part 12 are both circular arc surfaces, and a plurality of the grooves 13 are arranged in parallel.

[0047] In the above embodiment, the structure of the first fitting surface and the second fitting surface is relatively simple, which helps to realize the assembly of the body 1 and the rotating part 2, and also can realize that the rotating part can be stably maintained in a rotating state relative to the body 1.

[0048] Optionally, the structure for reducing the torsion load further comprises a powder outlet knife 4, the rotating part 2 is a developing roller, the powder outlet knife 4 is fixedly arranged on the body 1, and the powder outlet knife 4 is in contact with the developing roller.

[0049] The body 1, the powder outlet knife 4 and the developing roller jointly form a powder tank for filling carbon powder; the second part 12 is located on the side of the first part 11 away from the powder tank, and one end of the groove 13 is in communication with the powder tank.

[0050] In the above embodiment, the body 1 can be the body 1 of a toner cartridge, which can not only better ensure the sealing between the developing roller and the body 1, but also effectively reduce the torsion load and ensure the stability of the toner cartridge structure.

[0051] It should be noted that the body 1 and the rotating part 2 are in interference fit, and the interference fit brings about excessive torsion. The interference amount cannot be too small due to the life requirement of the toner cartridge. Because if the interference amount is too small, the developing roller will gradually wear out in the later stage of the life of the toner cartridge, and the pressure between the sealing part 3 and the developing roller will decrease, resulting in a decrease in the sealing performance. If the interference amount is too large, the torsion load borne by the rotating part 2 when rotating will be too large. Therefore, the groove 13 arranged on the first part 11 can effectively reduce the pressure acting surface, thereby reducing the rotating resistance of the developing roller and reducing the torsion load. Meanwhile, the second part 12 is not provided with the groove 13, and the second part 12 is tightly attached to the second matching surface through the sealing part 3, thereby effectively ensuring the sealing between the body 1 and the rotating part 2, and effectively preventing the carbon powder in the powder tank from overflowing.

[0052] Optionally, the developing roller rotates in a first direction.

[0053] The carbon powder filled between the first matching surface and the second matching surface moves in the direction of the powder tank under the action of the groove 13, i.e. the thread structure, thereby effectively preventing powder leakage, and better ensuring the function of the toner cartridge and the user experience.

[0054] Optionally, the rotating part 2 has two second matching surfaces, and the two second matching surfaces are located at two ends of the rotating part 2. This enables the rotating part 2 to be stably installed on the body 1, and effectively ensures the stability of the rotating part 2 during rotation.

[0055] Optionally, the sealing member is a sponge felt. The sponge felt has a certain elasticity, which can better ensure the sealing between the body 1 and the rotating part 2, and effectively prevent the carbon powder in the powder tank from overflowing.

[0056] Therefore, the structure for reducing the torsion load provided by the embodiment of the present application is reasonable in design, which can not only effectively reduce the torsion load, but also better ensure the sealing between the body 1 and the rotating part 2.

[0057] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered to be within the scope of protection of the present application.

Claims

1. A structure for reducing torsional load, applied to a laser printer, characterized in that, include: The body has a first mating surface; A rotating part, the rotating part having a second mating surface; The rotating part is mounted on the body, and the second mating surface is rotatably connected to the first mating surface; A sealing part is disposed between the first mating surface and the second mating surface, and the first mating surface and the second mating surface are interference fit; The first mating surface includes a first part and a second part along a first direction, and the first direction is parallel to the central axis of the rotating part. Both the first part and the second part are curved surfaces, and the first part is located on one side of the second part. Multiple grooves are spaced apart on the first part, and the multiple grooves are distributed along the circumference of the first part. The grooves are elongated. The grooves are inclined relative to the first direction and form a preset angle with respect to the first direction. The multiple grooves form a threaded structure. It also includes a powder dispensing blade, the rotating part is a developing roller, the powder dispensing blade is fixedly disposed on the body, and the powder dispensing blade is in contact with the developing roller; The main body, the powder dispensing blade, and the developing roller together constitute a powder hopper for filling toner; the second part is located on the side of the first part away from the powder hopper, and one end of the groove is connected to the powder hopper.

2. The structure for reducing torsional load according to claim 1, characterized in that, The preset included angle ranges from 30° to 60°.

3. The structure for reducing torsional load according to claim 2, characterized in that, The preset included angle has a range of 45°.

4. The structure for reducing torsional load according to claim 1, characterized in that, Both the first part and the second part are arc surfaces, and the plurality of grooves are arranged in parallel.

5. The structure for reducing torsional load according to claim 4, characterized in that, The developing roller rotates in a first direction; The toner filling the space between the first mating surface and the second mating surface moves toward the toner hopper under the action of the groove.

6. The structure for reducing torsional load according to claim 1, characterized in that, The rotating part has two second mating surfaces, which are located at both ends of the rotating part.

7. The structure for reducing torsional load according to claim 1, characterized in that, The sealing part is made of sponge felt.

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