CN1208201C

CN1208201C - Printer

Info

Publication number: CN1208201C
Application number: CN 02149770
Authority: CN
Inventors: 李翀; 中垣祐二; 穴户满春
Original assignee: JIANGYUYINGMEI INFORMATION SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: Kongyue Information Industry Co ltd
Priority date: 2002-12-24
Filing date: 2002-12-24
Publication date: 2005-06-29
Anticipated expiration: 2022-12-24
Also published as: CN1422750A

Abstract

The present invention discloses a printer. A previous printer generally used is characterized in that a guide shaft of a word carriage is rotated at a certain angle, and thus, a printing head is driven to move upwards and downwards to adjust the gap between the printing head and a printing roll; however, as for the adjusting method, the phenomenon of left and right deflection can also occur when the printing head moves upwards and downwards, the printing precision is influenced, and simultaneously, a very large torque is also needed when the guide shaft of the word carriage rotates. The present invention is characterized in that guide shafts of an upper word vehicle and a lower word vehicle which are erected between both side boards are provided with word carriages, and each of the word carriages is provided with a printing head; an adjusting mechanism capable of adjusting the gap between the printing head and a printing roll has the constitution that a drive gear of a drive motor is mutually engaged with a reduction gear, a cam is driven by the reduction gear, and the word carriages is driven by the guide shaft of the lower word carriage and can move upwards and downwards; a lever is supported by a shaft fixed on the side boards, one end of the lever is connected with the guide shaft of the lower word carriage, and the other end of the lever is connected with a spring fixed on the side boards. The present invention can adjust the gap between the printing head and the printing roll without need of rotating the guide shafts of the word carriages.

Description

Printer

Technical field

The present invention relates to a kind of printer, particularly a kind of a kind of printer of adjusting the gap between printhead and the marking roll.

Background technology

The structure of the printer that generally uses is normally set up an eccentric rotated type car guide shaft between biside plate now, the word car is installed on word car guide shaft, on the word car, carry printhead again, when the gap that need adjust at paper thickness between printhead and the marking roll, thereby the drive printhead that normally word car guide shaft rotated a certain angle moves up and down, reach the purpose of adjustment, but the phenomenon that printhead also can occur deflecting when moving up and down, thereby influence the printing precision of printer, the rotation of word car guide shaft simultaneously needs very big moment of torsion, has both needed powerful motor.

Summary of the invention

In order to overcome the deficiencies in the prior art, the invention provides a kind of guide shaft of adjusting and move up and down a kind of printer that just can adjust the gap between printhead and marking roll.

For solving the problems of the technologies described above, basic design of the present invention is: adopt and offer long guide hole on the printer side plate, word car guide shaft is passed in long guide hole, thereby the word car on it is also moved up and down with guide shaft, realized the gap adjustment between printhead and the marking roll.

As the first kind of technical scheme that realizes that the present invention conceives substantially, on between biside plate, set up on the lower word car guide shaft word car is installed, on the word car printhead is installed, the driven wheel that constitutes CD-ROM drive motor that can adjust printhead and the guiding mechanism in marking roll gap is with reduction gearing interlock mutually, cam is decelerated gear drive and joins with lower word car guide shaft, the word car is driven and can be moved up and down by lower word car guide shaft, lever is supported by the axle that is fixed on the side plate, one end and lower word car guide shaft join, the other end is connected with spring on being fixed on side plate, on, lower word car guide shaft is respectively from opening on the side plate, long guide hole passes down.

As the second kind of technical scheme that realizes that the present invention conceives substantially, on setting up between biside plate, the word car is installed on the lower word car guide shaft, on the word car printhead is installed, the guiding mechanism that can adjust printhead and marking roll gap also is installed in the printer, the driven wheel that constitutes CD-ROM drive motor of described guiding mechanism is with the interlock of reduction gearing phase, cam is decelerated gear drive and joins with lower word car guide shaft, the word car is driven and can be moved up and down by lower word car guide shaft, lever is supported by the axle that is fixed on the side plate, one end and lower word car guide shaft join, the other end is connected with spring on being fixed on side plate, lower word car guide shaft passes from the long guide hole of opening on side plate, last word car guide shaft is fixed on the biside plate, word car top is equipped with axle, suit fixed mount and torsion spring and bearing on the axle, bearing holder (housing, cover) are contained on the axle that is installed on the fixed mount, have the microscler guide hole of axle move left and right relatively on the fixed mount.

As to improvement of the technical scheme, described cam and described reduction gearing coaxial rotation; On the described lower word car guide shaft bearing that joins with cam has been installed; On the described lower word car guide shaft cylinder that joins with lever has been installed.

The invention has the beneficial effects as follows: the rotation by cam drives lower word car guide shaft and moves up and down in guide hole, thereby the word car on it is also moved up and down with guide shaft, realized the gap adjustment between printhead and the marking roll, and do not need to rotate the gap that word car guide shaft is adjusted printhead and marking roll, simultaneously because reduction gearing has been installed in guiding mechanism, even also rotating cam easily of the CD-ROM drive motor that uses smaller power.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the partial structurtes figure of first embodiment of the invention;

Fig. 2 is the partial enlarged drawing among Fig. 1;

Fig. 3 is the partial structurtes figure of second embodiment of the invention;

Fig. 4 is the vertical view of Fig. 3.

The specific embodiment

With reference to Fig. 1, Fig. 2, first embodiment of the invention, 20 of biside plates have the upper and lower two word car guide shafts 4,41 that pass from the guide hole 5,51 of slotted hole shape in the printer, word car 3 is installed on the word car guide shaft, but above-below direction moves around, be equipped with printhead 1 on the word car 3, printhead 1 matches with marking roll 2, finishes that word is printed on the printing paper.Fixing bearing 6 and cylinder 6a on lower word car guide shaft 41 respectively, the peripheral top of bearing 6 contacts with cam 7, and cam 7 has major diameter part and minor axis part, and the smooth connection of line of apsides part forms cam curve.The peripheral below of cylinder 6a joins with the bottom of " L " shape lever 8, and this lever 8 is supported by the axle 81 that is fixed on the side plate 20, can be that the center rotates with axle 81, and the upper end of lever 8 is connected with a end of coil tension spring 9 on being fixed on side plate 20.Reduction gearing 10 is coaxial with the axle 7a of cam 7, and this reduction gearing 10 is fixed on the side plate 20, with driven wheel 11 interlock mutually of CD-ROM drive motor 12.

Above-mentioned cam 7 also can directly contact with lower word car guide shaft 41 under the situation that bearing 6 is not installed, and by the rotation of cam 7, realizes that lower word car guide shaft 41 is moving in the guide hole 51 down.

Above-mentioned lever 8 also can be directly and lower word car guide shaft 41 join, perhaps directly and bearing 6 join, can realize making word car guide shaft 4,41 lifting in guide hole 5,51.

Above-mentioned cam 7 also can with reduction gearing 10 disalignments, drive and both can as long as be decelerated gear 10.

When needs are adjusted the gap of 2 of printhead 1 and marking rolls, output pulse signal makes CD-ROM drive motor 12 rotate at certain angle, pass through the rotation of driven wheel 11, reduction gearing 10 again, cam 7 is rotated, cam 7 turns to the major diameter part surface when contacting with the surface of bearing 6, pressure by cam 7, bearing 6 is depressed, also lever 8 is depressed simultaneously, lower word car guide shaft 41 is descending in the guide hole 51 down like this, go up simultaneously word car guide shaft 4 and also in last guide hole 5, descend, so also decline thereupon of word car 3, printhead 1 moves to the direction of proximity printing roller 2.When the surface of cam 7 rotation minor axis parts contacts with the surface of bearing 6, at this moment cam 7 loses the pressure to bearing 6, lever 8 is upspring cylinder 6a, word car guide shaft 4 also rises in last guide hole 5 on when lower word car guide shaft 41 rises in following guide hole 51 like this, therefore word car 3 rises, and printhead 1 moves to the direction of leaving marking roll 2.

With reference to Fig. 3, Fig. 4, the second embodiment of the present invention is that other structure and first embodiment are identical at the improvement of going up the syndeton between word car guide shaft 4 and the word car 3 among first embodiment.The structure of improvement part is as follows; Last word car guide shaft 4 is fixed on the biside plate 20, word car 3 tops are equipped with a 13a, axle 13a goes up suit fixed mount 14 and torsion spring 15 and bearing 16a, bearing 16b is sleeved on the axle 13b that is installed on the fixed mount 14, microscler guide hole axle 13a move left and right is relatively arranged on the fixed mount 14, with the two sides 4a of word car guide shaft 4 on the box lunch and 4b became uneven when even, by the elastic force adjustment axle 13b of torsion spring 15 and the position, the left and right sides of fixed mount 14, bearing 16a, 16b are fitted on two sides 4a, the 4b of word car guide shaft 4 respectively.

When lower word car guide shaft drive word car 3 moved up and down, bearing 6a, 6b just slided up and down along two sides 4a, the 4b of last word car guide shaft 4, move up and down thereby drive printhead, have reached the purpose of adjusting the gap between printhead and the marking roll.

Above-mentioned bearing 16a, 16b also can make the form of slide block, and the slide block sliding surface is attached to the last slip of two sides 4a, 4b of word car guide shaft 4 and need not to rotate simultaneously.

Claims

1. printer, comprise marking roll (2) and be erected between biside plate (20) on, lower word car guide shaft (4,41) and the word car of go up installing (3), printhead (1) is installed on the word car (3), the guiding mechanism that can adjust printhead (1) and marking roll (2) gap also is installed in the printer, the same reduction gearing of the driven wheel that constitutes CD-ROM drive motor (12) (11) (10) the phase interlock of described guiding mechanism, cam (7) is decelerated gear (10) driving and joins with lower word car guide shaft (41), word car (3) is driven and can be moved up and down by lower word car guide shaft (41), lever (8) is supported by the axle (81) that is fixed on the side plate (20), one end and lower word car guide shaft (41) join, and the other end is connected with spring (9) on being fixed on side plate (20); It is characterized in that upper and lower word car guide shaft (4,41) passes from the upper and lower long guide hole of opening on side plate (20) (5,51) respectively.

2. a kind of printer according to claim 1 is characterized in that described cam (7) and described reduction gearing (10) coaxial rotation.

3. a kind of printer according to claim 2 is characterized in that having installed on the described lower word car guide shaft (41) bearing (6) that joins with cam (7).

4. a kind of printer according to claim 3 is characterized in that having installed on the described lower word car guide shaft (41) cylinder (6a) that joins with lever (8).

5. printer, comprise marking roll (2) and be erected between biside plate (20) on, lower word car guide shaft (4,41) and the word car of go up installing (3), printhead (1) is installed on the word car (3), the guiding mechanism that can adjust printhead (1) and marking roll (2) gap also is installed in the printer, the same reduction gearing of the driven wheel that constitutes CD-ROM drive motor (12) (11) (10) the phase interlock of described guiding mechanism, cam (7) is decelerated gear (10) driving and joins with lower word car guide shaft (41), word car (3) is driven and can be moved up and down by lower word car guide shaft (41), lever (8) is supported by the axle (81) that is fixed on the side plate (20), one end and lower word car guide shaft (41) join, and the other end is connected with spring (9) on being fixed on side plate (20); It is characterized in that lower word car guide shaft (41) passes from the long guide hole of opening on side plate (20) (51), last word car guide shaft (4) is fixed on the biside plate (20), word car (3) top is equipped with axle (13a), axle (13a) is gone up suit fixed mount (14) and torsion spring (15) and bearing (16a), bearing (16b) is sleeved on the axle (13b) that is installed on the fixed mount (14), has the microscler guide hole of axle (13a) move left and right relatively on the fixed mount (14).

6. a kind of printer according to claim 5 is characterized in that described cam (7) and described reduction gearing (10) coaxial rotation.

7. a kind of printer according to claim 6 is characterized in that having installed on the described lower word car guide shaft (41) bearing (6) that joins with cam (7).

8. a kind of printer according to claim 7 is characterized in that having installed on the described lower word car guide shaft (41) cylinder (6a) that joins with lever (8).