CN2495467Y

CN2495467Y - Paper in/out device of printer mechanism

Info

Publication number: CN2495467Y
Application number: CN 01253476
Authority: CN
Inventors: 石奋宪
Original assignee: SHANGHAI HUALONG INFORMATION TECHNOLOGY DEVELOPMENT CENTER
Current assignee: SHANGHAI HUALONG INFORMATION TECHNOLOGY DEVELOPMENT CENTER
Priority date: 2001-09-05
Filing date: 2001-09-05
Publication date: 2002-06-19
Anticipated expiration: 2011-09-05

Abstract

A paper taking and conveying device in a printing mechanism is equipped with a stepping motor (9), a gear (11), paper taking arbor (1), a gear (4), a paper conveying arbor (6), a gear (5), a paper pressing arbor (8), etc. The gears (4) and (5) can be driven by the gear (11) to rotate when the gear (11) is rotating. The device is characterized in that the paper taking arbor (1) and the paper conveying arbor (6) are all equipped with unidirectional needle roller bearings, which can rotate just in one set direction. And the rotation directions of the two unidirectional needle roller bearings are reverse. A sensor (3) which can control the paper taking arbor (1) to rotate just for one circle whenever the paper is taken. With a most commonly used and reliable gear mechanism as a core, the utility mode adopts the unidirectional needle roller bearings to control the rotation of the gear mechanism. And the sensor is used to control a paper taking shaft to rotate for one circle. The whole design gets rid of a traditional mechanical design thought and has the advantages of simple structure and precise paper taking and conveying location.

Description

Getting in the printing mechanism, conveyer

Technical field

The utility model relate to a kind ofly get, the getting of conveyer, especially printing mechanism, conveyer.

Background technology

In ink-jet facsimile machine or the ink-jet printer owing to use common paper to print, for printing the paper that uses is discontinuous conveying, so to getting the paper paging, be positioned with very high requirement behind the particularly defeated paper, generally speaking, getting reel and defeated reel can not rotate by simultaneously same throughput direction, otherwise, be difficult to reach and get, defeated paper requires and the initial print position is accurately located, in order to reach this purpose, getting in the printing mechanism, conveyer uses the quite complicated composite structure of structure to finish usually, as compound ratchet mechanism, multiple mounted cam mechanism, compound multi-bar linkage or the like.

Summary of the invention

The purpose of this utility model is to reach under the prerequisite of same designing requirement, provides a kind of and simple and directly effectively gets, conveyer.

The utility model has designed getting in a kind of printing mechanism to achieve these goals, conveyer, this device is provided with stepper motor, gear with the stepper motor combination, get paper roller, with the gear of getting the paper roller combination, the feed rollers axle, gear with the combination of feed rollers axle, platen roll shaft etc., can drive and get when rotating with the gear of stepper motor combination, the gear of feed rollers axle combination rotates, the described paper roller of getting, the feed rollers axle is equipped with and can only rotates unidirectional needle bearing to a certain direction initialization, and the direction that two unidirectional needle bearings are rotated is opposite, also is provided with the controlled paper roller of producing near the paper roller and gets the sensor that paper only circles at every turn getting.That a described end of getting paper roller is provided with is one notched, coaxial and can be with getting paper roller with getting the paper roller rotary disk.Described sensor is one to be positioned at the light sensor of the positive front end of disk.Described unidirectional needle bearing and gear are integrated when injection moulding.Get paper roller near also be provided with the sensor that has or not paper in the detectable paper disc over against the position of paper disc.Be provided with the sensor that to confirm whether paper puts in place near the platen roll shaft.

The utility model is because of being core with the most frequently used, reliable gear mechanism, use unidirectional needle bearing to come the commentaries on classics of control gear mechanism or do not change, and control with a sensor and to get reel and only circle, the thinking of traditional mechanical mechanism design is broken away from whole design, simple in structure, get, fail the paper location accurately.

Description of drawings

Figure 1 shows that in the printing mechanism get, the structural representation of conveyer.

The specific embodiment

As shown in Figure 1: get in the printing mechanism, conveyer is provided with stepper motor 9, gear 11 with the stepper motor combination, get paper roller 1, with the gear 4 of getting paper roller 1 combination, feed rollers axle 6, gear 5 with the combination of feed rollers axle, platen roll shaft 8,

sensor

2,3,7, wherein feed rollers axle 6 is located at and is got paper roller 1 the place ahead along defeated paper direction, feed rollers axle 6, platen roll shaft 8 is positioned on same the straight line vertical with defeated paper direction, sensor 2 is positioned at the place ahead of paper disc, sensor 7 be positioned at platen roll shaft 8 near, but driven gear 4 when rotating with the gear 11 of stepper motor combination, gear 5 rotates, an end of getting paper roller 1 has a notched disk 10, sensor 3 is in the dead ahead of disk 10, when breach during over against sensor 3, sensor 3 output signals stop operating stepper motor 9, so getting paper roller 1 stops operating, can guarantee that like this get paper only rotates once at every turn, and guarantee not can be because of other former thereby produce accumulated error, feed rollers axle 6, getting paper roller 1 all adopts folk prescription only to the unidirectional needle bearing that rotates, described unidirectional needle bearing and gear are integrated when injection moulding, when gear and bearing when a certain direction is rotated, needle roller in the bearing can snap in the interior draw-in groove of bearing and drive axle and rotate together, when gear and bearing rotate in the opposite direction, needle roller in the bearing does not snap in the interior draw-in groove of bearing, promptly be in free state, this moment, axle did not rotate, so bearing does not rotate yet, so just realized making bearing only to rotate to a certain direction.Print used paper and put into carton by getting the paper direction, sensor 2 is used for surveying paper disc and has or not paper, when no paper, subsequent action will not carry out, after paper being arranged and receiving print command, stepper motor 9 rotates, getting paper roller 1 by gear 4 drives takes out paper along getting the paper direction, and be sent to the paper delivery direction, feed rollers axle 6 does not rotate at this moment, paper is rested on the centre of feed rollers axle 6 and platen roll shaft 8 with platen roll shaft 8, in order to determine the home position of initial defeated paper, sensor 7 is used to confirm whether paper puts in place, if put in place, output signal then, the stepper motor counter-rotating begins to rotate by gear 5 drive feed rollers axles 6 then, paper is transported to print position along the paper delivery direction, when getting paper roller and platen roll shaft, combination adopts the unidirectional needle bearing of different directions, can make feed rollers axle 6, another does not then change when getting paper roller 1 one of them rotation, because stepper motor transmission parameters etc. are adjustable, so can reach more accurate positioning requirements, than easier control of traditional mechanism and adjustment.

Claims

1. getting in the printing mechanism, conveyer, this device is provided with stepper motor (9), gear (11) with stepper motor (9) combination, get paper roller (1), with the gear (4) of getting paper roller (1) combination, feed rollers axle (6), gear (5) with the combination of feed rollers axle, platen roll shaft (8) etc., gear (11) but driven gear (4) when rotating, (5) rotate, it is characterized in that: get paper roller (1), feed rollers axle (6) is provided with and can only rotates unidirectional needle bearing to a certain direction initialization, and the direction that two unidirectional needle bearings are rotated is opposite, also is provided with the controlled paper roller (1) of producing near the paper roller (1) and gets the sensor (3) that paper only circles at every turn getting.

2. getting in the printing mechanism according to claim 1, conveyer is characterized in that: a described end of getting paper roller (1) is provided with one notched, coaxial and can be with getting paper roller (1) rotary disk (10) with getting paper roller (1).

3. getting in the printing mechanism according to claim 1 and 2, conveyer is characterized in that: described sensor (3) is one to be positioned at the light sensor of the positive front end of disk (10).

4. getting in the printing mechanism according to claim 1, conveyer, it is characterized in that: described unidirectional needle bearing and gear are integrated when injection moulding.

5. getting in the printing mechanism according to claim 1, conveyer is characterized in that: get paper roller (1) near also be provided with the sensor (2) that has or not paper in the detectable paper disc over against the position of paper disc.

6. getting in the printing mechanism according to claim 1, conveyer is characterized in that: be provided with the sensor (7) that can confirm paper and whether put in place near platen roll shaft (8).