Powder box

Abstract

The powder box at least comprises a powder bin for accommodating a developing agent, a magnetic roller rotatably arranged in the powder bin, and a gear end cover arranged at one end of the powder bin; the magnetic roller is arranged between the two end walls of the powder bin; a shaft sleeve mounting part for mounting a shaft sleeve is arranged on the gear end cover, and the shaft sleeve is arranged on the shaft sleeve mounting part; one end of the magnetic roller is connected with a magnetic roller gear, the magnetic roller gear comprises a tooth part, a shaft sleeve matching part and a magnetic roller positioning part, the shaft sleeve matching part and the magnetic roller positioning part are located on the two sides of the tooth part respectively, the shaft sleeve matching part is arranged on the shaft sleeve in a sleeving mode, and the magnetic roller positioning part is connected with the magnetic roller. The shaft sleeve is arranged on the gear end cover and is not arranged on the end wall of the powder bin, so that the structures of the powder bin and the shaft sleeve are simplified, the material cost can be reduced, and the assembly is more convenient. And the structure of the magnetic roller gear can realize stable power transmission, so that the printing quality is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic imaging photography, and in particular relates to a powder box used in image forming equipment. Background Art

[0002] A powder cartridge is a box that can be detachably installed in the main unit of an image forming device. As an integral unit, the powder cartridge includes a powder hopper that holds the developer, as well as various rotating parts, such as a stirring frame and a magnetic roller (MR). The magnetic roller is used to adsorb the developer onto its surface and charge the developer. The electrostatic latent image on the surface of the photosensitive drum of the developing unit is adsorbed by the electrostatically charged developer and thus developed. The rotation of the magnetic roller is driven by the magnetic roller gear, which meshes with the drive gear or the intermediate transmission gear. After receiving the rotational driving force from the image forming device, it drives the magnetic roller to rotate. The stable operation of the magnetic roller is conducive to ensuring print quality. Designing a stable transmission structure and reducing the complexity of the assembly process are the areas in which manufacturers can improve. Utility Model Content

[0003] The purpose of the utility model is to provide a powder box with a simple structure and easy assembly.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The powder box at least includes: a powder hopper for accommodating developer, a magnetic roller rotatably arranged in the powder hopper, and a gear end cover arranged at one end of the powder hopper; the magnetic roller is arranged between the two end walls of the powder hopper; a sleeve mounting portion for mounting a sleeve is provided on the gear end cover, and the sleeve is arranged on the sleeve mounting portion; one end of the magnetic roller is connected to a magnetic roller gear, and the magnetic roller gear includes a tooth portion and a sleeve mating portion and a magnetic roller positioning portion respectively located on both sides of the tooth portion, the sleeve mating portion is sleeved on the sleeve, and the magnetic roller positioning portion is connected to the magnetic roller.

[0006] In some embodiments, the distance between the end surface of the tooth portion opposite to the gear end cover and the end surface of the magnetic roller positioning portion opposite to the magnetic roller is 11.5 to 31.5 mm.

[0007] In some embodiments, the tooth portion, the shaft sleeve fitting portion and the magnetic roller positioning portion are an integrated structure.

[0008] In some embodiments, the diameter of the magnetic roller is 12 mm.

[0009] In some embodiments, the tooth portion is located outside the powder bin, the tooth portion and the shaft sleeve matching portion are located inside the gear end cover, and the magnetic roller positioning portion at least partially extends into the powder bin and is connected to the magnetic roller.

[0010] As can be seen from the above technical solution, the present invention sets the shaft sleeve on the gear end cap and uses a magnetic roller gear with a shaft sleeve mating portion and a magnetic roller positioning portion to connect the shaft sleeve and the magnetic roller, wherein the shaft sleeve mating portion is sleeved on the shaft sleeve, and the magnetic roller positioning portion is connected to the magnetic roller. Because the shaft sleeve is not set on the end wall of the powder silo, the structure of the powder silo and shaft sleeve is simplified, which can reduce material costs and facilitate assembly. Moreover, due to the adoption of the aforementioned structure, the powder box can use a small diameter (such as 12mm) magnetic roller, further reducing material costs. In addition, the structure of the magnetic roller gear can achieve stable power transmission, ensuring print quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a schematic structural diagram of a powder box according to an embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of the powder box according to an embodiment of the present utility model;

[0014] Figure 3 for Figure 1 Enlarged schematic diagram of part A.

[0015] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0016] The present invention is described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the sake of convenience, the drawings showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. It should be noted that the drawings are simplified and all use non-precise scales, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the terms "front", "back", "bottom", "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0017] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components; it can mean a wireless connection or a wired connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0018] An image forming device typically consists of a main unit and a removably mounted toner cartridge. The cartridge supplies developer to a developing unit, which develops the electrostatic latent image formed on the photosensitive element in the developing unit, thereby forming a visible image on a medium such as paper. A magnetic roller (MR) in the toner cartridge rotates around its axis and charges the developer. The triboelectrically charged developer is attracted to the surface of the magnetic roller, which then transfers the developer to the photosensitive drum as it rotates.

[0019] Reference Figure 1 、 Figure 2 and Figure 3 The powder cartridge of this embodiment includes at least a powder hopper 1 for storing developer, and a magnetic roller 2 rotatably disposed within the powder hopper 1. The powder cartridge of this embodiment does not involve a photosensitive drum cartridge and is suitable for a separate process cartridge. However, in other embodiments, the powder cartridge of this embodiment may also be suitable for an integrated process cartridge with a photosensitive drum cartridge.

[0020] Magnetic roller 2 is positioned between the longitudinal end walls (s1, s2) of powder silo 1. One end of magnetic roller 2 is connected to magnetic roller gear 3. The main body of magnetic roller gear 3 is positioned outside powder silo 1. Magnetic roller gear 3 meshes with other gears, such as a drive gear or an intermediate transmission gear, and rotates in response to the rotational drive force from the image forming device. Rotation of magnetic roller gear 3 drives magnetic roller 2 in turn.

[0021] In this embodiment, a through-hole is machined into the first end wall s1 of the powder silo 1, on the same side as the magnetic roller gear 3. One end of the magnetic roller gear 3 can pass through the through-hole in the first end wall s1, extending into the powder silo 1 and connecting to the magnetic roller 2. A through-hole is also machined into the second end wall s2 of the powder silo 1, away from the magnetic roller gear 3, through which the other end of the magnetic roller 2 passes. A gear end cover 4 is installed on the outside of the first end wall s1, which covers the various gears, such as the magnetic roller gear 3, the intermediate transmission gear (not shown), and the drive gear (not shown).

[0022] In this embodiment, the shaft sleeve 5 is arranged on the gear end cover 4, and a shaft sleeve mounting portion 4a is provided on the inner side of the gear end cover 4 (the side opposite to the first end wall s1), and the shaft sleeve 5 is arranged on the shaft sleeve mounting portion 4a.

[0023] The magnetic roller gear 3 of this embodiment comprises an integrally formed tooth portion 3-1, a sleeve mating portion 3-2, and a magnetic roller positioning portion 3-3. The tooth portion 3-1 of the magnetic roller gear 3 is located outside the powder silo 1 (first end wall s1) and is configured to mesh with a drive gear or intermediate transmission gear. The sleeve mating portion 3-2 and the magnetic roller connecting portion 3-3 are located axially on either side of the tooth portion 3-1. The sleeve mating portion 3-2 is configured to mate with the sleeve 5 disposed on the gear end cap 4, providing both connection and position control. The sleeve mating portion 3-2 is also located outside the powder silo 1 (first end wall s1). In this embodiment, the sleeve mating portion 3-2 is provided with a mounting groove (not shown) extending inward from the end surface of the sleeve mating portion 3-2 into the tooth portion. The sleeve 5 is disposed within the mounting groove. The magnetic roller positioning portion 3-3 at least partially extends into the powder silo 1. The magnetic roller positioning portion 3-3 is configured to connect with the magnetic roller 2, thereby driving the magnetic roller 2 in rotation.

[0024] Optionally, the distance d between the end surface of the tooth portion 3-1 of the magnetic roller gear 3 opposite the gear end cap 4 and the end surface of the magnetic roller positioning portion 3-3 opposite the magnetic roller 2 is 11.5 to 31.5 mm. In this embodiment, the distance d between the end surface of the tooth portion 3-1 of the magnetic roller gear 3 opposite the gear end cap 4 and the end surface of the magnetic roller positioning portion 3-3 opposite the magnetic roller 2 is 21.5 mm. When d is within the range of 21.5 ± 10 mm, it does not affect the normal use of the powder cartridge. Furthermore, the diameter of the magnetic roller 2 in this embodiment is 12 mm.

[0025] This utility model installs the shaft sleeve on the gear end cap rather than on the first end wall of the powder silo. A magnetic roller gear with a shaft sleeve mating portion and a magnetic roller positioning portion is used to connect the shaft sleeve and magnetic roller. The shaft sleeve mating portion of the magnetic roller gear fits over the shaft sleeve, simplifying the structure of the powder silo and shaft sleeve, reducing material costs and facilitating assembly. Furthermore, this structure facilitates the use of a small-diameter magnetic roller (e.g., 12 mm) in the powder silo, further reducing material costs.

[0026] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Powder box, including at least: A powder bin for accommodating developer, a magnetic roller rotatably disposed in the powder bin, and a gear end cover disposed at one end of the powder bin; The magnetic roller is arranged between the two end walls of the powder bin; Its characteristics are: The gear end cover is provided with a sleeve mounting portion for mounting a sleeve, and the sleeve is arranged on the sleeve mounting portion; One end of the magnetic roller is connected to a magnetic roller gear, and the magnetic roller gear includes a tooth portion and a shaft sleeve matching portion and a magnetic roller positioning portion respectively located on both sides of the tooth portion. The shaft sleeve matching portion is sleeved on the shaft sleeve, and the magnetic roller positioning portion is connected to the magnetic roller.

2. The powder box according to claim 1, wherein: The distance between the end surface of the tooth portion opposite to the gear end cover and the end surface of the magnetic roller positioning portion opposite to the magnetic roller is 11.5 to 31.5 mm.

3. The powder box according to claim 1, wherein: The tooth portion, the shaft sleeve matching portion and the magnetic roller positioning portion are an integrated structure.

4. The powder box according to claim 1, wherein: The diameter of the magnetic roller is 12 mm.

5. The powder box according to claim 1, wherein: The tooth portion is located outside the powder bin, the tooth portion and the shaft sleeve matching portion are located inside the gear end cover, and the magnetic roller positioning portion at least partially extends into the powder bin and is connected to the magnetic roller.

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