CN201102361Y

CN201102361Y - Improved structure for printer core rubber roll

Info

Publication number: CN201102361Y
Application number: CNU2007200084411U
Authority: CN
Inventors: 蒋文柏; 王友爱
Original assignee: XIAMEN JINGXIN SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: XIAMEN JINGXIN SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2007-09-30
Filing date: 2007-09-30
Publication date: 2008-08-20
Anticipated expiration: 2017-09-30

Abstract

The utility model discloses a printer core rubber roller improved structure which consists of a rubber part and a rubber roller core shaft. The rubber is tightly jointed with the rubber roller core shaft as a whole by bond when a tuber roller is processed for pressing rubber and manufactured. The rubber roller core shaft is the shape with a big middle part and two small ends. After the proposal is adopted, because the rubber roller core shaft of the utility model is shaped as a waist drum shape that the middle part is big and the two ends are small, the middle part of the structural shape is larger than the two ends, the bending-resistant intensity of the middle part is larger than the two ends, the deformations of the surrounding generatrix and the core shaft of waist drum shaped rubber roller core shaft can eliminate each other after bearing the pressure of a TPH (thermal printing head), and the contact pressure of the rubber body of the rubber roller and the TPH (thermal printing head) achieves uniformity, which accordingly ensures that the compactness of printing paper towards the TPH (thermal printing head) is consistent. The problem that the compactness of the rubber roller with the core shafts of uniform diameter towards the TPH (thermal printing head) is uneven, and accordingly the utility model avoids the problems that line printing effect is uneven because the bending deformation of the middle part of a columnar rubber roller core shaft is larger than the two ends.

Description

The improvement structure of printer core rubber roll

Technical field

The utility model relates to a kind of printer, particularly relates to a kind of improvement structure of printer core rubber roll.

Background technology

Because of rubber roll rubber to the coefficient of friction (being generally 0.5 ∽ 0.8) of hotness printing paper much larger than the coefficient of friction (be generally 0.05 ∽ 0.2) of printhead to the hotness printing paper, the rubber roll part of POS thermal printers core---rubber roll J is in POS printer (as shown in Figure 1), printhead to the pressure of its generation and produce to the static friction driving force of hotness printing paper greater than the sliding-frictional resistance of printhead to printing paper, thereby rubber roll can draw advancing of printing paper smoothly.Printer core rubber roll (as shown in Figure 2) is made up of cot mandrel 1 ' and the rubber sleeve 2 ' that is bonded on the cot mandrel 1 '.

The mount mode of rubber roll in movement be by bearing in two end supports, be subjected to TPH (hotness printhead) radial compression applied (briefly for simply supported beam force way) in length 70% ∽ 90% middle part; The cot mandrel of commonly using 1 ' is a cylindrical rod, the rubber roll of this structure is being subjected to TPH (hotness printhead) after radial compression applied, the middle part will present " dolioform " strain to outer lug (the less size elastic deformation amount of mandrel intended diameter is bigger if reduce cost) because of the simply supported beam force way, therefore the rubber roll rubber bodies of middle part will with TPH (hotness printhead) between contact pressure and will become less even not have (situation that middle elastic deformation amount is big), the inhomogeneous distortion that will directly produce the rubber roll rubber bodies of contact pressure is inhomogeneous, thereby the hotness printing paper that can produce the middle part is littler than two ends to the compaction degree of TPH (hotness printhead), light partially in the middle of being easy to generate (the middle not enough words of compaction degree have influenced the heat transmission of TPH (hotness printhead) heating dot matrix to hotness paper) problem.

The utility model content

The purpose of this utility model is to provide the improvement structure of the printer core rubber roll that a kind of printing effect improves.

For achieving the above object, technical solution of the present utility model is:

The utility model is a kind of improvement structure of printer core rubber roll, and it is made up of rubber sleeve and cot mandrel, and rubber sleeve is socketed on the cot mandrel; Described cot mandrel is shape small in the end and big in the middle.

The stage casing of described cot mandrel is a cylinder, and its two ends are the bullet that is connected with the stage casing cylinder.

Described cot mandrel size relationship is: (cylinder diameter D1-bullet end diameter D)/bullet end diameter D=5%-30%; Cylinder length L1/ cot mandrel total length L=5%-45%.

The stage casing of described cot mandrel is a dolioform cylinder, and its two ends are the bullet that is connected with dolioform cylinder.

The stage casing of described cot mandrel is a dolioform cylinder, and its two ends are the cylinder that is connected with dolioform cylinder.

Described cot mandrel size relationship is: (cylinder diameter D1-bullet end diameter D)/bullet end diameter D=5%-30%.

After adopting such scheme, because cot mandrel of the present utility model is " dolioform " shape small in the end and big in the middle, this planform is big than two ends because of the middle part, the bending strength of middle part is bigger than two ends gradually, peripheral bus of " dolioform " cot mandrel and mandrel are cancelled out each other by the distortion behind TPH (hotness printhead) pressure, the rubber roll rubber bodies is reached evenly with the pressure that contacts of TPH (hotness printhead), thereby make printing paper reach consistent the compaction degree of TPH (hotness printhead).This has just solved the compaction degree uneven problem of unified diameter mandrel rubber roll to TPH (hotness printhead).Thereby avoided commonly using cylindrical cot mandrel middle part bending deformation quantity and the line printing effect uneven problem that produce big preferably than two ends.

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Description of drawings

Fig. 1 is the user mode figure of rubber roll;

Fig. 2 is a cutaway view of commonly using rubber roll;

Fig. 3 is a cutaway view of the present utility model;

Fig. 4 is the cutaway view of first kind of structure of the utility model cot mandrel;

Fig. 5 is the cutaway view of second kind of structure of the utility model cot mandrel;

Fig. 6 is the cutaway view of the third structure of the utility model cot mandrel;

Fig. 7 is the utility model scheme of installation;

Fig. 8 is the utility model axle sleeve scheme of installation.

The specific embodiment

As shown in Figure 3, the utility model is a kind of improvement structure of printer core rubber roll, and it is made up of rubber sleeve 1 and cot mandrel 2.

Described rubber sleeve 1 is socketed on the cot mandrel 2.

As shown in Figure 4, described cot mandrel 2 " a kind of form be: be shape small in the end and big in the middle, interlude and two ends are circular arc and smoothly dwindle transition, and its integral body is " dolioform ".

As shown in Figure 5, the another kind of version of described cot mandrel 2 is: the stage casing is a cylinder 21, and its two ends are the bullet 22 that is connected with the stage casing cylinder.These cot mandrel 2 size relationships are:

(cylinder diameter D1-bullet end diameter D)/bullet end diameter D=5%-30%;

Cylinder length L1/ cot mandrel total length L=5%-45%.

As shown in Figure 6, the third shape of described cot mandrel 2A: the stage casing is a circular arc body 21A, and its two ends are the bullet 22A that is connected with stage casing circular arc body 21A.What be connected with the dolioform cylinder in stage casing also can be cylinder.

This cot mandrel 2A size relationship is: (cylinder diameter D1-bullet end diameter D)/bullet end diameter D=5%-30%.

In addition, go up (as shown in Figure 7) in order better rubber roll J to be fixed on pedestal JJ, at an end socket one axle sleeve 3 of cot mandrel 2, this axle sleeve 3 has a boss ring 31 (as shown in Figure 8), can play the effect that prevents that slippage from offing normal to the contact spring of miniature sense switch.

Emphasis of the present invention just is: cot mandrel is " dolioform " shape small in the end and big in the middle.

Claims

1, a kind of improvement structure of printer core rubber roll, it is made up of rubber part and cot mandrel, and rubber, closely connects as one with cot mandrel when rubber roll is made in moulding by binding agent; It is characterized in that: described cot mandrel is shape small in the end and big in the middle.

2, the improvement structure of printer core rubber roll according to claim 1 is characterized in that: the stage casing of described cot mandrel is a cylinder, and its two ends are the bullet that is connected with the stage casing cylinder.

3, the improvement structure of printer core rubber roll according to claim 2 is characterized in that: described cot mandrel size relationship is: (cylinder diameter D1-bullet end diameter D)/bullet end diameter D=5%-30%; Cylinder length L1/ cot mandrel total length L=5%-45%.

4, the improvement structure of printer core rubber roll according to claim 1 is characterized in that: the stage casing of described cot mandrel is a dolioform cylinder, and its two ends are the bullet that is connected with dolioform cylinder.

5, the improvement structure of printer core rubber roll according to claim 1 is characterized in that: the stage casing of described cot mandrel is a dolioform cylinder, and its two ends are the cone that is connected with dolioform cylinder.

6, the improvement structure of printer core rubber roll according to claim 4 is characterized in that: described cot mandrel size relationship is: (cylinder diameter D1-bullet end diameter D)/bullet end diameter D=5%-30%.