CN2281556Y

CN2281556Y - Carbon powder fixing device

Info

Publication number: CN2281556Y
Application number: CN 96205750
Authority: CN
Inventors: 卢煜炀
Original assignee: Acer Computer Co Ltd
Current assignee: BenQ Corp
Priority date: 1996-03-12
Filing date: 1996-03-12
Publication date: 1998-05-13
Anticipated expiration: 2006-03-12

Abstract

The utility model relates to a low energy consumption carbon powder fixing device whose temperature can be automatically regulated. The utility model comprises a fixing heat roller, a heating device and a supporting structure. The heating device is provided with an automatic temperature regulating function and can generate the proper heat to maintain the temperature of the fixing heat roller in a proper range. The heating device and the fixing heat roller are very close to save the energy.

Description

The carbon dust fixing device

The utility model relates to a kind of fixing device (Fu-sing Station) that is used for laser printer or duplicating machine, and it has the automatic temperature-control function, and is simple in structure.

In the printing process of laser printer or duplicating machine, last one program of printed medium (paper) process is by a fixing device.

In fixing device, the photographic fixing hot-rolling provides high temperature and paper is exerted pressure, and the carbon dust that is distributed on the paper is fused in the paper to produce permanent anchor effect.The fixing device of prior art comprise the photographic fixing hot-rolling that utilizes halogen lamp tube portion heating within it and a control halogen lamp tube switch circuit so that temperature keep within the specific limits.

Extensively adopted above-mentioned fixing device in laser printer or the duplicating machine.In the traditional approach shown in Figure 1A, fixing device comprises the halogen lamp tube 11 of a photographic fixing hot-rolling 10 and roller inside thereof.The photographic fixing hot-rolling is a cylindrical aluminum pipe 12, is coated with the very thin Teflon of one deck (teflon) 13 on it.

Shown in Figure 1B, in the process of carbon dust fusing, columniform aluminum pipe 12 is driven and is rotated by gear 14, and this moment, halogen lamp tube 11 was kept motionless under the support of supporter 15.In order to produce good printing effect, must so on the photographic fixing hot-rolling, must install a thermistor 101,, utilize opening or closing of temperature control equipment 102 control halogen lamp tubes then with temperature control within the specific limits to detect surface temperature.

Because the heat energy that halogen lamp tube 11 is produced also is not directly transferred on the cylindrical aluminium pipe 12, so the temperature on halogen lamp tube 11 surfaces, than the high several Baidu of surface temperature of cylindrical aluminum pipe 12.

So, the loss of heat is sizable, and within the specific limits with photographic fixing hot-rolling surface temperature control, thermal sensing element and temperature-control circuit must be arranged, in addition in order to reach the requirement of fusing carbon dust, must make the power of halogen lamp tube reach about 400 watts, these reasons can't reduce the manufacturing cost of fixing device.

The purpose of this utility model is, proposes a kind of fixing device cheaply, and it can avoid unnecessary heat dissipation.

The purpose of this utility model is to realize like this, a kind of carbon dust fixing device promptly is provided, comprise that a photographic fixing hot-rolling and provides the heating arrangement of required heat energy, described photographic fixing hot-rolling has the cylindrical outer surface that a pair of paper is exerted pressure, but described heating arrangement automatic temperature-control, this heating arrangement end is connected with two ac electrodes and by this electrode and power connection, described photographic fixing hot-rolling axially has the endoporus that holds heating arrangement.

The heating arrangement of the utility model device has the automatic temperature-adjusting regulatory function, does not need thermistor and temperature-control circuit, simplifies the structure and has reduced cost.This heating arrangement can directly contact with cylindrical aluminum pipe, so the element of available lower-wattage reaches suitable temperature, has reduced power loss.Because power loss reduces, can use the Universal Switching Power Supply power supply.

In conjunction with the embodiments the utility model is elaborated by accompanying drawing below, wherein:

Figure 1A is the sectional view of prior art fixing device;

Figure 1B is the side view of fixing device among Figure 1A;

Fig. 2 A is the sectional view of the utility model first embodiment;

Fig. 2 B be among the utility model Fig. 2 A embodiment along 2B-2B line cut-open view;

Fig. 3 is the automatic temperature-adjusting regulating characteristic curve figure of heating arrangement;

Fig. 4 A is the sectional view of the utility model second embodiment;

Fig. 4 B be among the utility model Fig. 4 A embodiment along the cut-open view of 4B-4B line;

Fig. 5 A is the sectional view of the utility model the 3rd embodiment;

Fig. 6 is first kind of electrode arrangement synoptic diagram in the utility model;

Fig. 7 is second kind of electrode arrangement synoptic diagram in the utility model;

Fig. 8 is the third electrode arrangement synoptic diagram in the utility model;

Fig. 9 is the 4th kind of electrode arrangement synoptic diagram in the utility model.

As shown in Figure 2, photographic fixing hot-rolling of the present utility model comprises a cylindrical aluminum pipe 22 of its internal layer, and one deck Teflon film 23 is arranged on the pipe.Hold heating arrangement 21 in the cylindrical aluminium pipe orifice, reach on the cylindrical aluminum pipe 22, and Teflon film 23 also is the conductor of heat except the insulator as electricity in order to produce suitable heat.

Because heating arrangement 21 can be pressed close to cylindrical aluminum pipe 22 or contact very much, so the heat energy major part that heating arrangement 21 is produced is used to keep the temperature of cylindrical aluminum pipe 22, thereby reduced heat energy loss, and heating arrangement 21 adopts the heating wire rod with automatic temperature-adjusting regulatory function, the automatic temperature-control heater wire (Self-Regulat-ing Heating Cable) made of RayChem company for example, the outer one deck fluoropolymer electrically insulating material that coats of this heater wire.This properties of materials curve as shown in Figure 3.

The set-up mode of heating arrangement 21 has many kinds, and is as described below.

Shown in Fig. 2 B, wherein heating arrangement 21 directly is looped around on the inwall of cylindrical aluminum pipe 22 endoporus.Or shown in Fig. 4 A and 4B, wherein a plurality of heating arrangements 21 are arranged on the inwall of cylindrical aluminum pipe 22 endoporus with being parallel to the photographic fixing hot-rolling longitudinal axis.Or as shown in Figure 5, heating arrangement 21 radial loop are on the outside surface of a hollow or solid cylinder 29.

The arrangement of ac electrode has many kinds, and is as described below.

As Fig. 6 or shown in Fig. 4 B, cylindrical aluminum pipe 22 two ends have

electrode contact

33,34, contact with exchanging

brush

35,36, electrode contact 33 or electrode contact 34 respectively with a certain end conducting of heating arrangement 21.Therefore cylindrical aluminum pipe 22 rotations do not influence the electric current input.Or as shown in Figure 7, positive contact 33, negative contact 34 are positioned at the same end of cylindrical aluminum pipe 22, electrical isolation between the two, and positive contact 33 electrically contacts with an end of heating arrangement 21, and negative contact 34 electrically contacts with the other end of heating arrangement 21, and electric energy is by

brush

35,36 inputs.As shown in Figure 8, positive contact 33, negative contact 34 are positioned at the same end of cylindrical aluminum pipe 22, be electrical isolation between the two, positive contact 33 is extended by solid cylinder shown in Figure 5 29 and electrically contacts with an end of heating arrangement 21, negative contact 34 electrically contacts with the other end of heating arrangement 21, and electric energy is by positive electrode 35 inputs of negative electrode brush 36 and double as support.Or as shown in Figure 9, positive contact 33 is extended by solid cylinder shown in Figure 5 29 1 ends and electrically contacts with an end of heating arrangement 21, negative contact 34 is extended by solid cylinder shown in Figure 5 29 other ends and electrically contacts with the other end of heating arrangement 21, and electric energy is by the positive electrode 35 and negative electrode 36 inputs of double as support.

Claims

1, a kind of carbon dust fixing device, comprise that a photographic fixing hot-rolling and provides the heating arrangement of required heat energy, described photographic fixing hot-rolling has the cylindrical outer surface that a pair of paper is exerted pressure, it is characterized in that, but described heating arrangement automatic temperature-control, this heating arrangement end is connected with two ac electrodes and by this electrode and power connection, described photographic fixing hot-rolling axially has the endoporus that holds heating arrangement.

2, the fixing device described in claim 1 is characterized in that, heating arrangement is looped around on the outside surface of a solid cylinder.

3, the fixing device described in claim 1 is characterized in that, heating arrangement is looped around the outside surface of a hollow cylinder.

4, the fixing device described in claim 1 is characterized in that, heating arrangement directly is looped around on the inwall of described endoporus.

5, the fixing device described in claim 1 is characterized in that, the parallel photographic fixing hot-rolling of described heating arrangement is axially set on the inwall of endoporus.

6, the fixing device described in claim 1 is characterized in that, two ac electrodes lay respectively at the difference end of photographic fixing hot-rolling.

7, the fixing device described in claim 1 is characterized in that, two ac electrodes are positioned at the same side of photographic fixing hot-rolling.