CN111781810A - a fixing mechanism - Google Patents

Abstract

A fixing mechanism comprising: the rotating roller assembly is used for driving the paper to move to the heating assembly; the heating component is used for heating and fixing the paper; the heating assembly and the rotating roller assembly are arranged oppositely and clamp paper together. The fixing mechanism has the advantages of being good in reliability, high in heat efficiency and good in medium compatibility.

Description

a fixing mechanism

technical field

The invention belongs to the technical field of office equipment, and in particular relates to a fixing mechanism.

Background technique

At present, people's requirements for office equipment are becoming more and more complicated, and there are more and more types of printed products. Therefore, the compatibility of laser printing fusing with different paper types and different media is getting higher and higher. However, the inherent properties of different types of paper are not the same, which leads to obvious differences in the fixing effect. Moreover, due to the different physical stiffness of the paper types of different media types, the degree of thermal deformation is also different, and the paper is easily wrinkled during fixing. .

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, the present invention provides a fixing mechanism, comprising:

The rotating roller assembly is used to drive the paper to move to the heating assembly;

The heating assembly is used to heat and fix the paper; the heating assembly and the rotating roller assembly are arranged opposite to each other, and the two jointly clamp the paper.

Preferably, the rotating roller assembly includes a pressure roller and a rotating shaft, the pressure roller is opposite to the heating assembly, the rotating shaft is disposed at both ends of the pressure roller, and the rotating shaft drives the pressure roller to rotate.

Preferably, the heating assembly includes: a sheet metal bracket and a heating bracket, and the heating bracket is adapted to be installed on the sheet metal bracket.

Preferably, the top section of the heating bracket is concave.

Preferably, the top of the sheet metal bracket is provided with an installation groove, and the bottom of the heating bracket is provided with a protruding part, and the protruding part is correspondingly fitted and installed in the installation groove, so that the heating bracket is supported on the on the sheet metal bracket.

Preferably, a cavity is formed between the sheet metal bracket and the heating bracket, and the heating assembly further includes: a circuit breaker bracket and a circuit breaker, the circuit breaker bracket and the circuit breaker are both arranged in In the cavity, the circuit breaker is arranged on the circuit breaker bracket.

Preferably, the heating assembly further comprises: a heating sheet, the heating sheet is arranged on the heating support, and the bottom of which is in close contact with the circuit breaker in the cavity.

Preferably, the heating assembly further comprises: a spring, two ends of the spring are respectively connected with the inner bottom wall of the cavity and the heating sheet.

Preferably, the heating assembly further comprises: a temperature sensor, which is arranged in the cavity and connected to the heating sheet.

Preferably, the heating assembly further includes: a shaft sleeve and a fixing film, wherein the shaft sleeve is arranged on both ends of the sheet metal bracket, and the fixing film is sleeved on the shaft sleeve and wraps around the Sheet metal bracket and the heating bracket.

The fixing mechanism provided by the present application has the characteristics of good reliability, high thermal efficiency and good compatibility with media.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of the overall structure of a fixing mechanism provided by the present invention;

2 is a partial structural schematic diagram of a fixing mechanism provided by the present invention;

Fig. 3 is a partial structural schematic diagram of a fixing mechanism provided by the present invention;

FIG. 4 is a schematic diagram of a use state of a fixing mechanism provided by the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

1-4, in the embodiment of the present application, the present application provides a fixing mechanism, including: a rotating roller assembly 10 and a heating assembly 20, each part will be described in detail below.

As shown in Figures 1-4, in the embodiments of the present application, a fixing mechanism provided by the present application includes:

The rotating roller assembly 10 is used to drive the paper 30 to move to the heating assembly 20;

The heating assembly 20 is used to heat and fix the paper 30 ; the heating assembly 20 and the rotating roller assembly 10 are disposed opposite to each other, and the two jointly clamp the paper 30 .

When using this fixing mechanism to fix the paper 30, the rotating roller assembly 10 drives the paper 30 to move to the heating assembly 30, the paper 30 is loaded with toner, the heating assembly 20 heats the toner on the paper 30, and the toner melts Then, it is fixed on the paper 30 to complete the fixing.

1-4, in the embodiment of the present application, the rotating roller assembly 10 includes: a pressure roller 11 and a rotating shaft 12, the pressure roller 11 is opposite to the heating assembly 20, and the rotating shaft 12 is disposed at the pressure roller 11. At both ends of the roller 11 , the rotating shaft 12 drives the pressure roller 11 to rotate.

In the embodiment of the present application, the rotating shafts 12 at both ends of the pressure roller 11 are respectively inserted into two opposite inner walls of the printer, and the pressure roller 11 contacts the paper 30 . The rotating shaft 12 is connected with the drive motor on the printer. When fixing is required, the drive motor is turned on and drives the rotating shaft 12 to rotate, and then the pressure roller 11 rotates and drives the paper 30 to move into the gap between the rotating roller assembly 10 and the heating assembly 20.

As shown in FIGS. 1-4 , in the embodiment of the present application, the heating assembly 20 includes: a sheet metal bracket 21 and a heating bracket 22 , and the heating bracket 22 is adapted to be installed on the sheet metal bracket 21 . The top of the sheet metal bracket 21 is provided with a mounting slot 23, and the bottom of the heating bracket 22 is provided with a protruding portion 24. The protruding portion 24 is correspondingly fitted in the mounting slot 23, so that the heating bracket 22 is supported on the sheet metal bracket 21 . A cavity is formed between the sheet metal bracket 21 and the heating bracket 22 , and the heating assembly 20 further includes: a circuit breaker bracket 25 and a circuit breaker 26 , the circuit breaker bracket 25 and the circuit breaker 26 are arranged in the cavity, and the circuit breaker 26 is arranged on the circuit breaker bracket 25 . The top section of the heating bracket 22 is concave.

1-4, in the embodiment of the present application, the heating assembly 20 further includes: a heating sheet 27, the heating sheet 27 is arranged on the heating bracket 22, and the bottom is connected to the The circuit breaker 26 fits snugly.

In the embodiment of the present application, the two ends of the sheet metal bracket 21 are respectively fixed on two opposite inner walls of the printer, and the heating bracket 22 is installed on the sheet metal bracket 21 to form a cavity therebetween. The circuit breaker bracket 25 and the circuit breaker 26 are arranged in the cavity, the circuit breaker bracket 25 is used to install the circuit breaker 26 , and the heating plate 27 is arranged on the heating bracket 22 and connected to the circuit breaker 26 . When the heating plate 27 is connected to the current to generate heat, the circuit breaker 26 will detect the current on the heating plate 27. When the current exceeds the preset value, the circuit breaker 26 will feed back to the controller to disconnect the connected current. So that the heating sheet 27 will not be damaged due to overload.

1-4, in the embodiment of the present application, the heating assembly 20 further includes: a spring 28, and two ends of the spring 28 are respectively connected to the inner bottom wall of the cavity and the heating sheet 27. The spring 28 firmly confines the heating plate 27 in the heating bracket 22 to prevent the heating plate 27 from shaking due to the movement of the paper 30 .

As shown in FIGS. 1-4 , in the embodiment of the present application, the heating assembly 20 further includes: a temperature sensor 29 . The temperature sensor 29 is disposed in the cavity and connected to the heating sheet 27 . When the heating plate 27 is connected to the current to generate heat, the temperature sensor 29 can detect the temperature of the heating plate 27. When the temperature exceeds the preset value, the temperature sensor 29 will feed back to the controller, and the controller will disconnect the connected current, so that The heating sheet 27 will not be damaged due to excessive temperature.

As shown in FIGS. 1-4 , in the embodiment of the present application, the heating assembly 20 further includes: a bushing 210 and a fixing film 211 , wherein the bushing 210 is arranged on both ends of the sheet metal bracket 21 , and the The fixing film 211 is sleeved on the shaft sleeve 210 and wraps around the sheet metal bracket 21 and the heating bracket 22 . When fixing, the heating plate 27 will melt the toner on the paper 30, and the fixing film 211 is used to support the paper 30 and assist the heating plate 27 to fix.

For the fixing effect of the heating assembly 20, the key point is the energy ΔE absorbed by the paper 30 (toner) through fixing, which is positively related to the time Δt and the temperature difference ΔT for the paper 30 to pass through the fixing, that is

Among them, φ is the constant value of the coefficient generated by the whole system; a is the contact surface width between the pressure roller and the heating assembly due to rubber deformation; v is the moving speed of the paper 30; T is the working temperature of fixing; T0 is the ambient temperature.

The moving speed v of the paper 30 is a fixed index of the product, and the ambient temperature T0 is an uncontrollable factor, so the improvement of the absorbed energy can only be changed by changing the two design parameters of the working temperature T and a. However, the working temperature of fixing is restricted by factors such as the temperature resistance of the material, the energy efficiency, and the temperature deformation of the material, and cannot be improved much. Therefore, increasing the value of a will improve the fixing effect.

By designing the surface of the heating assembly 20 in contact with the rotating roller assembly 10, the top section of the heating bracket 22 is concave, so that a larger a value can be obtained under the same pressure, thereby improving the fixing effect. Since the paper 30 will generate in-phase shrinking force during the heating process, wrinkles of the paper 30 are likely to occur during printing on thin paper, and in severe cases, mechanical failures such as fixing jams are likely to occur. Therefore, in the design, the fixing heating element is designed in the shape of a waist drum, and its curvature is 1/2000. This design is mainly for the purpose of making it stretch outwards when it is under force, so as to offset the shrinkage of the paper 30 caused by the temperature.

The fixing mechanism provided by the present application has the characteristics of good reliability, high thermal efficiency and good compatibility with media.

It should be understood that the above-mentioned specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, but not to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. Furthermore, the appended claims of this invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.

Claims (10)

1. A fixing mechanism, characterized by comprising:

the rotating roller assembly is used for driving the paper to move to the heating assembly;

the heating component is used for heating and fixing the paper; the heating assembly and the rotating roller assembly are arranged oppositely and clamp paper together.

2. A fixing mechanism according to claim 1, wherein said rotating roller assembly includes: pressure roller and pivot, the pressure roller with heating element is relative, the pivot set up in the pressure roller both ends, the pivot drives the pressure roller rotates.

3. A fixing mechanism according to claim 1, wherein said heating member includes: panel beating support and heating support, heating support adaptation install in on the panel beating support.

4. A fixing mechanism according to claim 3, wherein a top cross-section of said heating holder is concave.

5. A fixing mechanism as claimed in claim 3, wherein a mounting groove is provided at the top of the sheet metal bracket, and a protrusion is provided at the bottom of the heating bracket, the protrusion being correspondingly fitted in the mounting groove, so that the heating bracket is supported on the sheet metal bracket.

6. A fusing mechanism as recited in claim 3, wherein a cavity is formed between said sheet metal bracket and said heating bracket, said heating assembly further comprising: the circuit breaker comprises a circuit breaker support and a circuit breaker, wherein the circuit breaker support and the circuit breaker are both arranged in the cavity, and the circuit breaker is arranged on the circuit breaker support.

7. A fusing mechanism as recited in claim 6, wherein said heating component further comprises: the heating plate is arranged on the heating support, and the bottom of the heating plate is tightly attached to the circuit breaker protector in the cavity.

8. A fusing mechanism as recited in claim 7, wherein said heating component further comprises: and two ends of the spring are respectively connected with the inner bottom wall of the cavity and the heating sheet.

9. A fixing mechanism according to claim 7 or 8, wherein said heating member further comprises: and the temperature sensor is arranged in the cavity and is connected with the heating sheet.

10. A fixing mechanism according to claim 3, wherein said heating member further comprises: the fixing device comprises a shaft sleeve and a fixing film, wherein the shaft sleeve is arranged at two tail ends of the sheet metal support, and the fixing film is sleeved on the shaft sleeve and is wound on the sheet metal support and the heating support.

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