Patent Application
20190121269
The present disclosure relates to a fusing device and a printing apparatus therewith, and more particularly, to a fusing device capable of reducing heat loss and a printing apparatus therewith.
Laser printers and copy machines usually utilize a photosensitive drum to transfer toners on a printing media, such as paper. In order to make sure that the toners can be attached on the printing media stably, laser printers and copy machines usually further utilize a fusing device to fuse the toners onto the printing media by heating and pressing, which achieves an enhanced printing effect. However, in the prior art, a metal structure of the fusing device, which is used for reinforcing structural strength, is connected to the heating metal plate directly. Metal has excellent heat conductivity, which may lead to great heat loss. Therefore, in order to compensate the heat loss, the fusing device has to generate more heat continuously. It causes high electricity consumption. Furthermore, when the great heat loss occurs, the toners may not be fused completely, so that the toner cannot be attached onto the printing media stably, which reduces printing quality.
Therefore, an objective of the present disclosure is to provide a fusing device capable of reducing heat loss and a printing apparatus therewith.
In order to achieve the aforementioned objective, the present disclosure discloses a fusing device adapted for fusing toners onto a printing media. The fusing device includes a driving roller and a fusing unit. The driving roller is for driving the printing media to move along a moving direction. The fusing unit includes a heat insulating component, a heat generating component, a heat conducting component, a heat reflecting component, a metal reinforcing component and a fusing component. An accommodating space is formed in the heat insulating component. An opening is formed on a side of the heat insulating component near the driving roller and communicated with the accommodating space. The heat generating component is located inside the accommodating space and for generating heat. The heat conducting component is connected to the heat insulating component and covers the opening. The heat reflecting component is connected to the heat insulating component. The heat reflecting component is located inside the accommodating space and on a side of the heat generating component away from the heat conducting component for reflecting the heat generated by the heat generating component to the heat conducting component. The metal reinforcing component is installed on an outer side of the heat insulating component. A stiffness of the metal reinforcing component is greater than a stiffness of the heat insulating component. The fusing component movably encloses the heat conducting component, the heat insulating component and the metal reinforcing component. The heat conducting component conducts the heat to the fusing component, and the fusing component contacts with the printing media to fuse the toners onto the printing media by heating when the driving roller drives the printing media to move along the moving direction.
According to an embodiment of the present disclosure, the heat conducting component and the metal reinforcing component are separated from each other.
According to an embodiment of the present disclosure, the metal reinforcing component is disposed on a side of the heat insulating component away from the driving roller.
According to an embodiment of the present disclosure, a cross section of the metal reinforcing component is substantially formed in a U shape, and two sides of the metal reinforcing component are fixed on the side of the heat insulating component away from the driving roller.
According to an embodiment of the present disclosure, the heat reflecting component and the heat conducting component are separated from each other.
According to an embodiment of the present disclosure, a cross section of the heat insulating component is substantially formed in a U shape. A first step-shaped structure is formed on a side of the heat insulating component near the opening. The first step-shaped structure includes a first disposing surface and a second disposing surface, and a side of the heat conducting component and a side of the heat reflecting component are connected to the first disposing surface and the second disposing surface respectively and do not contact with each other.
According to an embodiment of the present disclosure, a second step-shaped structure is formed on another side of the heat insulating component near the opening. The second step-shaped structure includes a third disposing surface and a fourth disposing surface, and another side of the heat conducting component and another side of the heat reflecting component are connected to the third disposing surface and the fourth disposing surface respectively and do not contact with each other.
According to an embodiment of the present disclosure, the heat reflecting component is a bent mirror aluminum plate.
According to an embodiment of the present disclosure, the heat insulating component is made of heat resistant plastic.
In order to achieve the aforementioned objective, the present disclosure further discloses a printing apparatus including a toner cartridge, a photoconductive drum and a fusing device. The toner cartridge stores toners. The photoconductive drum is for transferring the toners from the toner cartridge to a printing media. The fusing device is for fusing the toners onto the printing media. The fusing device includes a driving roller and a fusing unit. The driving roller is for driving the printing media to move along a moving direction. The fusing unit includes a heat insulating component, a heat generating component, a heat conducting component, a heat reflecting component, a metal reinforcing component and a fusing component. An accommodating space is formed in the heat insulating component. An opening is formed on a side of the heat insulating component near the driving roller and communicated with the accommodating space. The heat generating component is located inside the accommodating space and for generating heat. The heat conducting component is connected to the heat insulating component and covers the opening. The heat reflecting component is connected to the heat insulating component. The heat reflecting component is located inside the accommodating space and on a side of the heat generating component away from the heat conducting component for reflecting the heat generated by the heat generating component to the heat conducting component. The metal reinforcing component is installed on an outer side of the heat insulating component. A stiffness of the metal reinforcing component is greater than a stiffness of the heat insulating component. The fusing component movably encloses the heat conducting component, the heat insulating component and the metal reinforcing component. The heat conducting component conducts the heat to the fusing component, and the fusing component contacts with the printing media to fuse the toners onto the printing media by heating when the driving roller drives the printing media to move along the moving direction.
In summary, the present disclosure utilizes the heat insulating component for isolating the heat conducting component, the heat reflecting component and the metal reinforcing component. Furthermore, the metal reinforcing component with the greater stiffness is installed on the outer side of the heat insulating component. In such a way, it prevents the heat from transferring from the heat conducting component to the heat reflecting component or the metal reinforcing component, which reduces heat loss effectively and maintains temperature. Therefore, the fusing device can achieve a purpose of reducing electricity consumption and enhancing printing quality.
These and other objectives of the present disclosure will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
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The metal reinforcing component 1325 is installed on an outer side of the heat insulating component 1321 and separated from the heat conducting component 1323. A stiffness of the metal reinforcing component 1325 can be greater than a stiffness of the heat insulating component 1321 for increasing structural strength of the fusing unit 132, which prevents structural failure of the fusing unit 132 caused by the driving roller 131. In this embodiment, the metal reinforcing component 1325 can be installed onto the outer side of the heat insulating component 1321 by fasteners. The fusing component 1326 movably encloses the heat conducting component 1323, the heat insulating component 1321 and the metal reinforcing component 1325. In this embodiment, the fusing component 1326 can be a fusing belt or a fusing film. The heat insulating component 1321 and the metal reinforcing component 1325 together support the fusing component 1326 for maintaining a shape of the fusing component 1326. The heat conducting component 1323 conducts the heat to the fusing component 1326, and the fusing component 1326 contacts with the printing media 2 to fuse the toners onto the printing media 2 by heating when the driving roller 131 drives the printing media 2 to move along the moving direction S.
In this embodiment, preferably, a cross section of the heat insulating component 1321 can be substantially formed in a U shape. A first step-shaped structure L1 is formed on a side of the heat insulating component 1321 near the opening 1328. The first step-shaped structure L1 includes a first disposing surface P1 and a second disposing surface P2. A second step-shaped structure L2 is formed on another side of the heat insulating component 1321 near the opening 1328. The second step-shaped structure L2 includes a third disposing surface P3 and a fourth disposing surface P4. Two sides of the heat conducting component 1323 are connected to the first disposing surface P1 and the third disposing surface P3 respectively. Two sides of the heat reflecting component 1324 are connected to the second disposing surface P2 and the fourth disposing surface P4 respectively. In other words, by arrangement of the first step-shaped structure L1 and the second step-shaped structure L2, the heat conducting component 1323 and the heat reflecting component 1324 can be separated from each other. In such a way, it prevents the heat from transferring from the heat conducting component 1323 to the heat reflecting component 1324, which reduces heat loss. Furthermore, in order to increase the structural strength of the fusing unit 132, preferably, a cross section of the metal reinforcing component 1325 can be substantially formed in a U shape. Two sides of the metal reinforcing component 1325 can be fixed on a side 13213 of the heat insulating component 1321 away from the driving roller 131. That is, the metal reinforcing component 1325 and the heat conducting component 1323 are located at two opposite sides of the heat insulating component 1321 and separated from each other. In such a way, it prevents the heat from transferring from the heat conducting component 1323 to the metal reinforcing component 1325, which reduces heat loss, too. Besides, in this embodiment, preferably, the heat reflecting component 1324 can be a bent mirror aluminum plate, and the heat insulating component 1321 can be made of heat resistant plastic. However, it is not limited to this embodiment. It depends on practical demands. For example, in another embodiment, the two sides of the heat conducting component 1323 can be connected to the first disposing surface P1 and the third disposing surface P3, and the two sides of the heat reflecting component 1324 can also be connected to the disposing surface P1 and the third disposing surface P3 to contact with the two sides of the heat conducting component 1323.
In contrast to the prior art, the present disclosure utilizes the heat insulating component for isolating the heat conducting component, the heat reflecting component and the metal reinforcing component. Furthermore, the metal reinforcing component with the greater stiffness is installed on the outer side of the heat insulating component. In such a way, it prevents the heat from transferring from the heat conducting component to the heat reflecting component or the metal reinforcing component, which reduces heat loss effectively and maintains temperature. Therefore, the fusing device can achieve a purpose of reducing electricity consumption and enhancing printing quality.
Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the disclosure. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 106136635 | Oct 2017 | TW | national |
