Structure-reinforced fixing roller

Abstract

The utility model discloses a structure strengthening type fixing roller which comprises a fixing roller assembly, elastic assemblies distributed in a circumferential array mode are arranged in the fixing roller assembly, each elastic assembly comprises a soft spring attached to the inner wall of the fixing roller assembly, and a hard spring is arranged on the outer wall of each soft spring in a surrounding mode. A gap is formed between the hard spring and the inner wall of the fixing roller assembly. According to the structure-reinforced fixing roller provided by the utility model, the soft spring is higher than the hard spring, so that when soft paper is copied and printed, the soft contact is firstly carried out through the soft spring, the soft contact is not seriously stressed, and the supporting plate is prevented from being in contact with the hard spring, so that the paper is prevented from being damaged; and through the hard spring at the bottom of the soft spring, when hard paper is copied and printed, the soft spring is firstly pressed downwards, and then hard connection is performed through the hard spring, so that the printing pressure is transmitted, and the high printing speed and the good printed matter quality are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fixing rollers, in particular to a structurally reinforced fixing roller. Background Art

[0002] The fixing roller of a copier is the main device for fixing the copied toner image of the copier. It is a key component of the fixing part of the copier. It consists of two parts: the fixing upper roller and the fixing lower roller.

[0003] For example, patent CN204759032U discloses a fixing roller reinforcement structure, including a roller body made of a hollow metal tube, wherein the roller body is provided with one or more axial elastic metal reinforcement rings. Since the utility model has one or more axial elastic metal reinforcement rings inside the hollow metal tube, the strength of the hollow metal tube can be ensured even when the tube wall is thin, thereby extending the service life of the fixing roller.

[0004] In actual operation, during the printing and copying process, papers of different hardness are used according to needs. According to the different hardness of papers, fixing rollers of different hardness need to be constantly replaced, which reduces work efficiency.

[0005] It can be seen that the above-mentioned problems existing in the prior art need to be improved urgently. Utility Model Content

[0006] In view of the above problems existing in the prior art, one aspect of the present invention is to provide a structurally reinforced fixing roller to solve the problem that during the printing and copying process, when facing papers of different hardness, fixing rollers of different hardness need to be constantly replaced, which reduces work efficiency.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a structurally reinforced fixing roller, including a fixing roller assembly, wherein the interior of the fixing roller assembly is provided with elastic components distributed in a circular array, the elastic components include soft springs attached to the inner wall of the fixing roller assembly, the outer wall of the soft spring is surrounded by a hard spring, and a gap is formed between the hard spring and the inner wall of the fixing roller assembly.

[0008] Preferably, the fixing roller assembly comprises a fixing roller, a rotating shaft is centrally inserted inside the fixing roller, an inner groove is provided inside the fixing roller, and the elastic components are distributed in a linear array inside the inner groove.

[0009] Preferably, the inner wall of the inner groove away from the rotating shaft is provided with support plates distributed in a circular array, and the inner wall of the inner groove close to the rotating shaft is provided with a bottom plate.

[0010] Preferably, a soft spring is provided on an outer wall of the bottom plate away from the rotating shaft corresponding to each of the support plates, and an end of each of the soft springs away from the bottom plate is connected to the support plate.

[0011] Beneficial effects:

[0012] Compared with the prior art, the structurally reinforced fixing roller provided by the utility model has the following beneficial effects:

[0013] 1. The soft spring is higher than the hard spring. When soft paper is copied and printed, it will first be softly contacted by the soft spring to avoid damage to the paper.

[0014] 2. Through the hard spring at the bottom of the soft spring, when the harder paper is copied and printed, the soft spring is first pressed down and then hard connected through the hard spring to transmit the printing pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the structure of a fixing roller assembly provided in an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the structure of a front cross-section of an elastic component provided by an embodiment of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the side section of the elastic component provided in an embodiment of the utility model.

[0019] Main reference numerals:

[0020] 1. Fusing roller assembly; 2. Elastic assembly; 101. Fusing roller; 102. Rotating shaft; 103. Inner groove; 201. Bottom plate; 202. Support plate; 203. Soft spring; 204. Hard spring. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-3As shown, a structurally reinforced fixing roller includes a fixing roller assembly 1. The fixing roller assembly 1 is internally provided with elastic components 2 distributed in a circumferential array. The elastic components 2 include soft springs 203 attached to the inner wall of the fixing roller assembly 1. The outer wall of the soft spring 203 is surrounded by a hard spring 204. A gap is formed between the hard spring 204 and the inner wall of the fixing roller assembly 1.

[0023] The main purpose of the structurally reinforced fixing roller is to make the soft spring 203 higher than the hard spring 204. When a softer paper is copied and printed, it will first make soft contact through the soft spring 203 to avoid damage to the paper. Also, through the hard spring 204 at the bottom of the soft spring 203, when a harder paper is copied and printed, the soft spring 203 is first pressed downward and then hard connected through the hard spring 204, thereby transmitting the printing pressure.

[0024] In the technical solution provided by this utility, Figure 1 , Figure 2 and Figure 3 It can be seen that the fixing roller assembly 1 includes a fixing roller 101, and a rotating shaft 102 is centrally arranged inside the fixing roller 101, and an inner groove 103 is provided inside the fixing roller 101. The elastic component 2 is distributed in a linear array inside the inner groove 103, and elastic support is provided for various parts of the fixing roller 101 to perform fixing work according to paper of different hardness materials.

[0025] Furthermore, the inner wall of the inner groove 103 away from the rotating shaft 102 is fitted with support plates 202 distributed in a circular array, and the inner wall of the inner groove 103 close to the rotating shaft 102 is provided with a bottom plate 201. The outer wall of the fixing roller 101 can be supported by each support plate 202, and the hardness of the outer wall of the fixing roller 101 can be changed by the elastic component 2 to perform fixing work according to paper of different hardness.

[0026] Furthermore, soft springs 203 are provided on the outer wall of the bottom plate 201 away from the rotating shaft 102 corresponding to each support plate 202, and the end of each soft spring 203 away from the bottom plate 201 remains connected to the support plate 202. When a softer paper is used for fixing, the soft spring 203 is subjected to a lighter force and will not be pressed down too much, thereby avoiding contact with the hard spring 204. When a harder paper is used for fixing, the soft spring 203 will be pressed by force, so that the support plate 202 is in contact with the hard spring 204, thereby hardening the outer wall of the fixing roller 101, which can better transmit the printing pressure and ensure a higher printing speed and better print quality.

[0027] Working principle: First, when a soft paper is being fixed, the soft spring 203 in contact with the support plate 202 will provide a soft state to the fixing roller 101, thereby avoiding contact with the hard spring 204 at the bottom, thereby avoiding damage and wrinkles to the paper due to high hardness, and failing to complete the fixing work;

[0028] When a harder paper is being fixed, the soft spring 203 of the support plate 202 is directly pressed by force, so that the internal support plate 202 contacts the hard spring 204, so that the outer wall of the fixing roller 101 needs a greater force to be pressed down, thereby changing the hardness of the outer wall of the fixing roller 101, thereby better transmitting the printing pressure and ensuring a higher printing speed and better print quality.

[0029] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A structurally reinforced fixing roller, characterized in that: The invention comprises a fixing roller assembly (1), wherein an elastic assembly (2) distributed in a circumferential array is arranged inside the fixing roller assembly (1), wherein the elastic assembly (2) comprises a soft spring (203) attached to the inner wall of the fixing roller assembly (1), and a hard spring (204) is arranged around the outer wall of the soft spring (203), and a gap is formed between the hard spring (204) and the inner wall of the fixing roller assembly (1).

2. The structurally reinforced fixing roller according to claim 1, characterized in that: The fixing roller assembly (1) comprises a fixing roller (101), a rotating shaft (102) is centrally arranged inside the fixing roller (101), an inner groove (103) is provided inside the fixing roller (101), and the elastic assembly (2) is arranged in a linear array inside the inner groove (103).

3. The structurally reinforced fixing roller according to claim 2, characterized in that: The inner wall of the inner groove (103) away from the rotating shaft (102) is provided with support plates (202) distributed in a circumferential array, and the inner wall of the inner groove (103) close to the rotating shaft (102) is provided with a bottom plate (201).

4. The structurally reinforced fixing roller according to claim 3, characterized in that: The outer wall of the bottom plate (201) away from the rotating shaft (102) is provided with a soft spring (203) corresponding to each of the support plates (202), and the end of each of the soft springs (203) away from the bottom plate (201) is connected to the support plate (202).

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