CN200947169Y

CN200947169Y - Core shaft for pressurization of laser printer or copier

Info

Publication number: CN200947169Y
Application number: CN 200620077729
Authority: CN
Inventors: 叶大江
Original assignee: JINGJIANG DONGYANG PRECISION MACHINERY CO Ltd
Current assignee: JINGJIANG DONGYANG PRECISION MACHINERY CO Ltd
Priority date: 2006-08-15
Filing date: 2006-08-15
Publication date: 2007-09-12
Anticipated expiration: 2016-08-15

Abstract

A spindle used for pressurizing of laser printer or duplicator belongs to fixation pressure roller component of imaging and transfer printing device, which is designed to solve the problems such as the accident potential of enamel exploding and unsafe and unreliable working conditions exists in current pressurizing spindle. The utility model has a metal cylinder, of which the two ends are firmly fitted and connected to the left and right enamels. The utility model is characterized in that the left and right enamel surface is provided with threaded grooves to prevent the accumulation and rising of high temperature expansion air pressure; the left and right enamel connects with the metal cylinder by cotter pins to reinforce the firm connection between the two enamels and the metal cylinder effectively. The utility model can effectively prevent the accident caused by enamel explosion, thereby ensuring the safe and reliable working condition of pressure roller.

Description

The pressurization mandrel of laser printer or duplicating machine

(1) technical field: the utility model belongs to the technical field of laser printer or duplicating machine, is specifically related to the parts of photographic fixing backer roll in the imaging transfer device of duplicating machine or laser printer.

(2) background technology: the imaging transfer device of duplicating machine or laser printer comprises parts such as photosensitive drums, developer roll, transfer device and fixing roller.Fixing roller wherein comprises photographic fixing topping roll and photographic fixing bottom roll.The printer paper that has been transferred the ink powder pattern places between photographic fixing topping roll and the photographic fixing bottom roll, the photographic fixing topping roll that the halogen heating lamp is housed is as heating source, make toner particles fusing and merge mutually and permeate to paper substrate, the bottom roll of photographic fixing simultaneously applies certain pressure to increase the adhesive ability of toner particles, when printer paper leaves heating source, ink powder solidifies, and the ink powder figure is cured on the paper, finishes fixing.

Above-mentioned photographic fixing bottom roll is called again and adds dandy roll, and it is made of with mandrel and the rubber that is wrapped in mandrel outside pressurization.The pressurization of photographic fixing bottom roll with the structure of mandrel as shown in Figure 1 to Figure 3 in the prior art: see Fig. 3, it is made of left sealing-plug 1 and the right sealing-plug 3 that aluminum pipe 2 and sealing wringing fit connect, and left sealing-plug 1 and right sealing-plug 3 are referred to as left enamel and right enamel again on this specialty.Fig. 1 and Fig. 2 are respectively the outward appearance front elevation of left enamel and right enamel, and as seen from the figure, the outside surface of left enamel and right enamel is a smooth surface.See Fig. 3, during assembling, directly left enamel 1 and right enamel 3 are squeezed in the aluminum pipe 2.Pressurization shown in Figure 3 with mandrel coated outside rubber, is promptly become the photographic fixing backer roll.When actual photographic fixing is manipulated, the photographic fixing backer roll is near the photographic fixing topping roll as heating source, air in the aluminum pipe of photographic fixing backer roll mandrel also reaches the high temperature of about 180 degree, after the air thermal expansion, because aluminum pipe is different with the thermal expansivity of two ends enamel, the air that thermal expansion usually occurs is blown the enamel at two ends, causes the accident and the damage of machine.

(3) summary of the invention: the accident potential and the dangerous reliable problem of working that structurally exist enamel to blow with mandrel at the pressurization that adds dandy roll of existing laser printer or duplicating machine, the applicant has carried out research and has improved, the pressurization mandrel that can be used for laser printer or duplicating machine of another kind of structure is provided, and it can solve the problems of the technologies described above.

The technical solution of the utility model is as follows:

The pressurization mandrel of laser printer or duplicating machine, it has a metal cylinder, and metal cylinder two ends wringing fit connects left enamel and right enamel, and the surface of left enamel and right enamel has groove, and left enamel and right enamel are connected with described metal cylinder with pin.

Because the surface of left enamel and right enamel has the lines groove, after pressurization was assembled into backer roll with mandrel, in actual use, the high temperature expanded air in the metal cylinder can be released from the lines groove on left enamel and right enamel surface, prevents gathering and raising of pressure; Left side enamel and right enamel are connected with metal cylinder with pin, effectively reinforce being fastenedly connected of two enamel and metal cylinder.Owing to adopt the improvement of said structure, can effectively prevent the accident that enamel is blown, make to add the safe and reliable of dandy roll.

(4) description of drawings:

Fig. 1 and Fig. 2 are respectively the pressurization left enamel of mandrel and the front view of right enamel in the existing photographic fixing bottom roll;

Fig. 3 is the pressurization cut-open view of mandrel in the existing photographic fixing bottom roll;

Fig. 4 is a structure cut-open view of the present utility model;

Fig. 5 and Fig. 6 are respectively the front view of left enamel and right enamel among Fig. 4.

(5) embodiment:

See Fig. 4, the utility model has a metal aluminum barrel 4, and aluminum barrel 4 two ends wringing fits connect left enamel 1 and right enamel 7, and left enamel 1 and right enamel 7 usefulness steel are made.See Fig. 4 to Fig. 6, the surface of left enamel 1 and right enamel 7 has latticed lines groove 9 and 8, also can have the lines groove of other shapes, as the bar groove parallel with the metal cylinder length direction.Can also have the groove of other shapes.

See Fig. 4, be connected by bearing pin 2, bearing pin 3 and bearing pin 6, bearing pin 5 respectively between a left side enamel 1 and right enamel 7 and the metal aluminum barrel 4, bearing pin 2 is got mutually perpendicular direction with bearing pin 3 and bearing pin 6 with bearing pin 5, reinforces the intensity that is connected between two ends enamel and the metal aluminum barrel 4 by bearing pin.

Claims

1, the pressurization mandrel of laser printer or duplicating machine, it has a metal cylinder, metal cylinder two ends wringing fit connects left enamel and right enamel, is characterised in that: the surface of left enamel and right enamel has groove, and left enamel and right enamel are connected with described metal cylinder with pin.

2, by the pressurization mandrel of described laser printer of claim 1 or duplicating machine, be characterised in that described groove is the lines groove.

3, by the pressurization mandrel of described laser printer of claim 1 or duplicating machine, be characterised in that described lines groove is a grid lines groove.