Fixing film, fixing device and image forming device

Abstract

The utility model discloses a fixing film, a fixing device and an image forming device, and the fixing film comprises a base material layer which comprises a first middle section and a first wear section; the silica gel layer comprises a second middle section and a second wear section; the PFA layer is connected to the other side of the silica gel layer; wherein the thickness of the first abrasion section is larger than that of the first middle section, the thickness of the second middle section is larger than that of the second abrasion section, and the sum of the thickness of the first abrasion section and the thickness of the second abrasion section is equal to the sum of the thickness of the first middle section and the thickness of the second middle section. The thickness of the first abrasion section of the base material layer of the photographic fixing film is larger than that of the first middle section, and the thickness of the second abrasion section of the silica gel layer is smaller than that of the second middle section, so that the thickness of the friction section between the two ends of the photographic fixing film and the photographic fixing film shaft sleeve of the photographic fixing device is increased; the service life of the fixing film can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of image forming devices, in particular to a fixing film, a fixing device and an image forming device. Background Art

[0002] Image forming devices such as printers and copiers include a fixing device, which melts the developer under high temperature and pressure, allowing it to penetrate the paper fibers. Common heating methods for fixing devices include halogen lamp heating, ceramic heating, and electromagnetic induction heating.

[0003] The fuser film is a key component in ceramic heating fusing technology. It's cylindrical and wraps around the ceramic sheet, moving in a circular motion as the printer prints. Over time, the fuser film gradually wears out, with the end surfaces particularly susceptible to wear, which can affect its overall lifespan. Utility Model Content

[0004] The utility model aims to provide a fixing film, a fixing device and an image forming device, so as to solve the problem that the fixing film is easily worn at both end surfaces during printing, which affects its service life and leads to poor printing effect of the image forming device.

[0005] In a first aspect, the utility model provides a fixing film, comprising:

[0006] a substrate layer, the substrate layer comprising a first middle section and a first wear section, wherein the first wear sections are provided at opposite ends of the first middle section;

[0007] a silicone layer, wherein the substrate layer is connected to one side of the silicone layer, the silicone layer includes a second middle section and a second wear section, and the second wear sections are provided at opposite ends of the second middle section;

[0008] A PFA layer, the PFA layer being connected to the other side of the silicone layer;

[0009] in:

[0010] The thickness of the first wear segment is greater than the thickness of the first middle segment, the thickness of the second middle segment is greater than the thickness of the second wear segment, and the sum of the thicknesses of the first wear segment and the second wear segment is equal to the sum of the thicknesses of the first middle segment and the second middle segment.

[0011] In the fixing film as described above, preferably, the thickness of the first wear segment increases linearly within a preset distance from a connection point between the first middle section and the first wear segment in a direction away from the connection point.

[0012] In the fixing film as described above, preferably, the thickness of the first wear section is 5-450 μm, and the thickness of the second wear section is 5-400 μm.

[0013] In the fixing film as described above, preferably, the thickness of the first middle section is 5-400 μm, and the thickness of the second middle section is 5-450 μm.

[0014] In the fixing film as described above, preferably, the thickness of the PFA layer is 5-50 μm.

[0015] In the fixing film as described above, preferably, the lengths of the first wear section and the second wear section are 1-30 mm.

[0016] In the fixing film as described above, preferably, the lengths of the first middle section and the second middle section are 216-330 mm, and the length of the PFA layer is 216-400 mm.

[0017] In the fixing film as described above, preferably, the lengths of the first middle section and the second middle section are 297-420 mm, and the length of the PFA layer is 297-480 mm.

[0018] In a second aspect, the present invention provides a fixing device comprising the aforementioned fixing film.

[0019] In a third aspect, the present invention provides an image forming device, comprising the aforementioned fixing device.

[0020] Compared with the prior art, the thickness of the first wear section at both ends of the fixing film substrate layer of the utility model is set to be greater than the thickness of the first middle section, and the thickness of the second wear section at both ends of the silicone layer is set to be less than the thickness of the second middle section. Without changing the overall thickness of the fixing film, the thickness of the section where friction occurs between the two ends of the fixing film and the fixing film sleeve of the fixing device is increased, which can effectively extend the service life of the fixing film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a fixing film in the prior art;

[0022] Figure 2 It is a structural schematic diagram of a fixing film provided by an embodiment of the present utility model;

[0023] Figure 3 is a schematic cross-sectional view of a fixing film provided in an embodiment of the present utility model;

[0024] Figure 4It is a three-dimensional diagram of a fixing device provided in an embodiment of the present utility model;

[0025] Figure 5 It is a cross-sectional view of a fixing device provided in an embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 10-fixing film, 11-base material layer, 111-first middle section, 112-first wear section, 12-silicone layer, 121-second middle section, 122-second wear section, 13-PFA layer;

[0028] 20-fixing device, 21-fixing film sleeve, 22-pressure roller, 23-thermistor, 24-ceramic sheet, 25-ceramic sheet bracket, 26-U-shaped sheet metal;

[0029] 100-base layer, 200-rubber layer, 300-coating layer. DETAILED DESCRIPTION

[0030] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] Reference Figure 1 As shown, the fixing film 10 in the prior art includes a base layer 100, a rubber layer 200 and a coating layer 300 which are sequentially covered and connected. The thicknesses of the base layer 100, the rubber layer 200 and the coating layer 300 are generally consistent. When the fixing film 10 with this structure is installed in the fixing device 20, both ends are fixed by the fixing film sleeves 21 respectively. During operation, the fixing film 10 rotates, so that friction is continuously generated between the end faces of the fixing film 10 and the corresponding fixing film sleeves 21. As long-term printing work proceeds, the wear between the end faces of the fixing film 10 and the fixing film sleeves 21 gradually intensifies, and the end faces of the fixing film 10 will gradually wear out, thereby affecting the overall service life of the fixing film 10.

[0032] In order to extend the service life of the fixing film 10, firstly, referring to Figure 2 as well as Figure 3 As shown, the present invention provides a fixing film 10, comprising a substrate layer 11 (i.e., base layer 100), a silicone layer 12 (i.e., rubber layer 200), and a PFA layer 13 (i.e., coating 300). The substrate layer 11, the silicone layer 12, and the PFA layer 13 are sequentially covered and connected, wherein:

[0033] The substrate layer 11 includes a first middle section 111 and a first wear section 112 , with the first wear section 112 being provided at both opposite ends of the first middle section 111 . The silicone layer 12 includes a second middle section 121 and a second wear section 122 , with the second wear section 122 being provided at both opposite ends of the second middle section 121 . The PFA layer 13 is provided on the side of the silicone layer 12 away from the substrate layer 11 .

[0034] In order to ensure that the sum of the thicknesses of the extension 2 and the second wear section 122 is equal to the sum of the thicknesses of the first middle section 111 and the second middle section 121, compared to the conventional fixing film 10, the fixing film 10 of the present application can increase the thickness of the section that rubs against the fixing film sleeve 21, reduce the thickness of the silicone layer 12 at both ends, and maintain the same thickness of the PFA layer 13 without changing the overall thickness of the fixing film 10. Even if the fixing film 10 wears, it will take a relatively long time to heal, thereby extending the service life of the fixing film 10.

[0035] In the embodiment provided by the present application, the first wear segment 112 is thickened in a smooth manner, that is, the thickness of the first wear segment 112 increases linearly within a preset distance from the connection point between the first middle segment 111 and the first wear segment 112 to the direction away from the connection point. The preset distance is the distance between the connection point between the first middle segment 111 and the first wear segment 112 and the position corresponding to the first wear segment 112 and the second wear segment 122. The thickness of the subsequent first wear segment 112 remains unchanged.

[0036] The connection shape of the second wear segment 122 and the second middle segment 121 is adapted to the connection shape of the first wear segment 112 and the first middle segment 111 .

[0037] In the embodiment provided in the present application, the substrate layer 11 can be made of PI material or SUS material. PI material (i.e., polyimide material) is a high-performance engineering plastic with excellent heat resistance, excellent electrical insulation performance, mechanical properties, chemical stability, aging resistance, radiation resistance, low dielectric loss and wide temperature adaptability, which is beneficial to improving the wear resistance of the substrate layer 11.

[0038] SUS material is a stainless steel material with good mechanical properties, corrosion resistance and heat resistance. When the substrate layer 11 is made of SUS material, due to its own characteristics, the substrate layer 11 has good strength and wear resistance, and strong damage resistance, which is beneficial to extending the service life of the fixing film 10.

[0039] The PFA layer 13 is a perfluoroalkoxy compound, a perfluorinated polymer. PFA has excellent chemical resistance, high temperature resistance, and electrical insulation properties. Furthermore, because PFA itself is non-sticky and has a smooth surface, it is resistant to water, oil, and other substances. Covering the PFA layer 13 on the side of the silicone layer 12 away from the substrate layer 11 protects both the substrate layer 11 and the silicone layer 12, further improving the service life of the fixing film 10.

[0040] The PFA layer can be made using different processes. If it is made using a spraying process, the PFA layer is a coating, and if it is made using a fluorocoating process, the PFA layer is in the form of a sleeve. The form of the PFA layer can be selected according to actual needs and is not limited here.

[0041] In a feasible embodiment, the thickness range of the first wear segment 112 is 5-450 μm, the thickness range of the second wear segment 122 is 5-400 μm, the thickness range of the first intermediate segment 111 is 5-400 μm, the thickness of the second intermediate segment 121 is 5-450 μm, and the thickness of the PFA coating 13 is 5-50 μm. The thickness of the first wear segment 112, the second wear segment 122, the first intermediate segment 111 and the second intermediate segment 121 can be selected and set according to the type of printing equipment. It is only necessary to ensure that the sum of the thickness of the first wear segment 112 and the second wear segment 122 is equal to the sum of the thickness of the first intermediate segment 111 and the second intermediate segment 121. No limitation is made here.

[0042] For papers of different sizes, the required length of the fixing film 10 is different. Under the premise of ensuring that the first wear section 112 can fully play its protective role, the lengths of the first middle section 111 and the second middle section 121 are set to meet the needs of different printing devices.

[0043] In the embodiment provided in the present application, the length of the first wear segment 112 and the second wear segment 122 is the same and can be set to 1-30 mm. For A4 paper printing equipment, the length of the first middle segment 111 and the second middle segment 121 can be set to 216-330 mm. The length of the PFA layer 13 should be the sum of the first wear segment 112 (or the second wear segment 122) and the first middle segment 111 (or the second middle segment 121) at both ends. Therefore, the length range of the PFA layer 13 is 216-400 mm.

[0044] For A3 paper printing equipment, since the paper size is relatively large, the length of the first middle section 111 and the second middle section 121 should be extended accordingly. Therefore, the length range of the first middle section 111 and the second middle section 121 is set to 297-420 mm, and the length range of the PFA layer 13 is correspondingly changed to 297-480 mm.

[0045] Secondly, refer to Figure 4 as well as Figure 5 As shown, the utility model provides a fixing device 20, including the aforementioned fixing film 10, a ceramic sheet 24, a fixing film sleeve 21, a thermistor 23 and a pressure roller 22. The fixing film 10 is sleeved on the outer peripheral wall surface of the ceramic sheet 24, and the two ends of the fixing film 10 are respectively connected to a fixing film sleeve 21. The fixing film 10 has a U-shaped sheet metal 26 inside for supporting the fixing film 10. The ceramic sheet 24 is arranged on a ceramic sheet bracket 25. The thermistor 23 is arranged in the ceramic sheet 24 to heat the fixing film 10.

[0046] The working principle of the fixing device 20 is as follows: after the toner image is adsorbed on the paper, the paper is transported between the fixing film 10 and the pressure roller 22. As the paper passes through, the thermistor 23 and the pressure roller 22 work together to melt the toner and make it penetrate into the paper, forming a permanent image.

[0047] In a third aspect, the present invention provides an image forming apparatus including the aforementioned fixing device 20. Since the fixing device 20 includes the aforementioned fixing film 10, and the fixing film 10 has a long service life, the service life of the image forming apparatus is correspondingly extended.

[0048] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A fixing film, characterized in that: include: a substrate layer, the substrate layer comprising a first middle section and a first wear section, wherein the first wear sections are provided at opposite ends of the first middle section; a silicone layer, wherein the substrate layer is connected to one side of the silicone layer, the silicone layer includes a second middle section and a second wear section, and the second wear sections are provided at opposite ends of the second middle section; A PFA layer, the PFA layer being connected to the other side of the silicone layer; in: The thickness of the first wear segment is greater than the thickness of the first middle segment, the thickness of the second middle segment is greater than the thickness of the second wear segment, and the sum of the thicknesses of the first wear segment and the second wear segment is equal to the sum of the thicknesses of the first middle segment and the second middle segment.

2. The fixing film according to claim 1, wherein From a connection point between the first middle section and the first wear segment toward a direction away from the connection point, the thickness of the first wear segment increases linearly within a preset distance.

3. The fixing film according to claim 1, wherein The thickness of the first wearing segment is 5-450 μm, and the thickness of the second wearing segment is 5-400 μm.

4. The fixing film according to claim 1, wherein The thickness of the first middle section is 5-400 μm, and the thickness of the second middle section is 5-450 μm.

5. The fixing film according to claim 1, wherein The thickness of the PFA layer is 5-50 μm.

6. The fixing film according to claim 1, wherein The lengths of the first wear segment and the second wear segment are 1-30 mm.

7. The fixing film according to claim 1, wherein The lengths of the first middle section and the second middle section are 216-330 mm, and the length of the PFA layer is 216-400 mm.

8. The fixing film according to claim 1, wherein The lengths of the first middle section and the second middle section are 297-420 mm, and the length of the PFA layer is 297-480 mm.

9. A fixing device, characterized in that: The fixing film comprises the fixing film according to any one of claims 1 to 8.

10. An image forming apparatus, characterized in that: The fixing device according to claim 9 is included.

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