A developing roller

Abstract

The utility model discloses a developing roller, it includes roller body, rubber layer and metal inner ring, and metal inner ring is equipped between roller body and rubber layer, metal inner ring is equipped with the slot and makes the inner diameter of metal inner ring variable, rubber layer has the through cavity, and the end surface of through cavity is equipped with the recess, and the outside of metal inner ring is equipped with the convex point, and metal inner ring piece inserts into the through cavity, the diameter of roller body is greater than the through cavity diameter of rubber layer, and the inside of roller body inserts into metal inner ring, and roller body expands open rubber layer through metal inner ring, to make roller body, metal inner ring and rubber layer interclose compression joint and constitute the whole. It has simple structure, compact cooperation, reasonable in design and the advantages such as, therefore, it is a kind of product with superior performance in technicality and economy.

Description

Technical Field

[0001] This utility model mainly relates to a developing roller. Background Technology

[0002] The toner cartridge is the core imaging device of a laser printer, and the developing roller is an important part of it. The developing roller consists of a roller shaft and a compressible rubber layer surrounding the roller shaft.

[0003] In traditional developing roller structures, the rubber layer is usually fixed to the roller body using an adhesive. However, during long-term use, the adhesive is susceptible to environmental factors such as temperature and humidity, leading to aging or failure, which in turn causes relative rotation or detachment between the rubber layer and the roller body.

[0004] In view of this, we propose a developing roller that is easy to assemble and has a stable connection. By optimizing the fit between the inner metal ring and the roller body and rubber layer, it can effectively prevent relative rotation or axial dislodgement between components, thereby improving the overall reliability and service life of the developing roller. Utility Model Content

[0005] To solve at least one of the above problems, this utility model proposes a new structural solution. The developing roller of this utility model adopts the following technical solution:

[0006] A developing roller includes a roller body, a rubber layer, and a metal inner ring, wherein the metal inner ring is disposed between the roller body and the rubber layer;

[0007] The inner metal ring has a slot, which allows the inner diameter of the inner metal ring to be variable;

[0008] The rubber layer has a through cavity with recessed holes on the end face of the cavity and protrusions on the outer side of the inner metal ring. The inner metal ring is inserted into the through cavity. The diameter of the roller body is larger than the diameter of the through cavity of the rubber layer. The roller body is inserted into the inner side of the inner metal ring. The roller body expands the rubber layer through the inner metal ring so that the roller body, the inner metal ring and the rubber layer are tightly pressed together to form a whole.

[0009] Preferably, the position and size of the protrusion correspond to the position and size of the concave hole.

[0010] Preferably, the end of the roller body is provided with an inclined surface.

[0011] Preferably, the inner surface of the metal inner ring and the end face of the roller are provided with anti-slip texture.

[0012] Preferably, the end of the metal inner ring extends into a retaining edge.

[0013] The beneficial effects of this utility model compared with the prior art are:

[0014] This invention proposes a developing roller in which a metal inner ring is inserted into the cavity of a rubber layer, ensuring that the protrusions and recesses are aligned and interlocked, preventing relative rotation between the metal inner ring and the rubber layer. Simultaneously, the inner side of the metal inner ring is inserted into the roller body, and the roller body expands the diameter of the metal inner ring, causing the roller body, rubber layer, and metal inner ring to press together to form a unified structure. Combined with anti-slip textures on the inner sides of the roller body and the metal inner ring, the components are tightly connected and unlikely to detach, improving connection stability. It boasts advantages such as simple structure, compact fit, and reasonable design; therefore, it is a product with superior technical and economic performance. Attached Figure Description

[0015] Figure 1 A schematic diagram of the developing roller in a preferred embodiment of this utility model;

[0016] Figure 2 A first-view schematic diagram of the developing roller in a decomposed state in a preferred embodiment of this utility model;

[0017] Figure 3 This is a second-view schematic diagram of the developing roller in a decomposed state in a preferred embodiment of the present invention. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown 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.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] The preferred embodiment provided by this utility model is as follows: Figures 1-3 As shown, a developing roller includes a roller body 1, a rubber layer 2, and a metal inner ring 3, with the metal inner ring 3 disposed between the roller body 1 and the rubber layer 2; the metal inner ring 3 has a slot 31 so that the inner diameter of the metal inner ring 3 can be varied to accommodate the roller body insertion and expansion.

[0022] The rubber layer 2 has a through cavity 21, and the end face of the through cavity 21 is provided with recessed holes 22. The outer side of the metal inner ring 3 is provided with protrusions 32. The metal inner ring 3 is inserted into the through cavity 21. The diameter of the roller body 1 is larger than the diameter of the through cavity 21 of the rubber layer 2. Furthermore, the diameter of the roller body 1 is slightly larger than the diameter of the rubber layer 2 to achieve an interference fit connection. The roller body 1 is inserted into the inner side of the metal inner ring 3. The roller body 1 expands the rubber layer 2 through the metal inner ring 3 so that the roller body 1, the metal inner ring 3 and the rubber layer 2 are tightly pressed together to form a whole.

[0023] The position and size of the protrusion 32 correspond to the position and size of the concave hole 22.

[0024] The end of the roller body 1 is provided with an inclined surface 11, which allows the roller body 1 to smoothly enter the inner side of the metal inner ring 3 through the inclined surface 11. The inner side of the metal inner ring 3 and the end face of the roller body 1 are provided with anti-slip textures 34. The shape of the anti-slip textures is not limited here and can be designed as needed.

[0025] The end of the inner metal ring 3 extends into a flange 33. The flange is located at one end of the inner metal ring. When the roller 1 is pushed to the flange 33, the roller 1 cannot continue to move due to the obstruction of the flange 33. This design limits the installation direction of the roller 1.

[0026] Assembly process: First, insert the inner metal ring 3 into the through cavity 21 and adjust the position of the inner metal ring 3 so that the positions of the protrusion 32 and the concave hole 22 are aligned and engaged, so that the inner metal ring 3 and the rubber layer 2 are not prone to relative rotation; further, insert the inner side of the inner metal ring 3 into the roller body 1, and use the roller body 1 to expand the diameter of the inner metal ring 3, so that the roller body 1, the rubber layer 2 and the inner metal ring 3 are pressed together to form a whole. With the anti-slip texture on the inner side of the roller body 1 and the inner metal ring 3, the components are tightly connected and are not prone to detachment, thus improving the connection stability.

[0027] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A developing roller, characterized in that: It includes a roller body, a rubber layer, and a metal inner ring, with the metal inner ring located between the roller body and the rubber layer; The inner metal ring has a slot, which allows the inner diameter of the inner metal ring to be variable; The rubber layer has a through cavity with recessed holes on the end face of the cavity and protrusions on the outer side of the inner metal ring. The inner metal ring is inserted into the through cavity. The diameter of the roller body is larger than the diameter of the through cavity of the rubber layer. The roller body is inserted into the inner side of the inner metal ring. The roller body expands the rubber layer through the inner metal ring so that the roller body, the inner metal ring and the rubber layer are tightly pressed together to form a whole.

2. A developing roller according to claim 1, characterized in that: The position and size of the protrusions correspond to the position and size of the concave holes.

3. A developing roller according to claim 1, characterized in that: The ends of the roller are provided with inclined surfaces.

4. A developing roller according to claim 1, characterized in that: The inner surface of the metal inner ring and the end face of the roller are both provided with anti-slip texture.

5. A developing roller according to claim 1, characterized in that: The end of the metal inner ring extends out to form a retaining edge.

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