CN1425563A

CN1425563A - Printer

Info

Publication number: CN1425563A
Application number: CN 02151792
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: 2002-12-31
Filing date: 2002-12-31
Publication date: 2003-06-25
Anticipated expiration: 2022-12-31
Also published as: CN1210161C

Abstract

In the printer, the drive roller has regulating mechanism to regulate the elastic force to the lower driving roller, and the deformation driving mechanism of the regulating mechanism has at least one set of gears being allowed to rotate only in single direction. After the drive roller is regulated to required elastic strength, the elastic force between the drive roller and the driving roller will be maintained in proper value even if the current of the motor in the deformation driving mechansm is cut off. The present invention is power saving and may be used widely in various printers.

Description

Printer

Technical field

The present invention relates to a kind of printer, particularly relate to a kind of thickness according to employed printing paper, its driven cylinder is to the adjustable printer of bullet relay of head roll.

Background technology

Existing printer is the purpose that reaches fed printing sheet with the mode of movement that head roll and driven cylinder are formed, generally, driven cylinder is to change according to the thickness of printing paper is different to the bullet relay of head roll, when printing individual sheets or continuous form, the power of the bullet relay between head roll and the driven cylinder need be adjusted, that is to say, when printing thin single-sheet stationery, the resistance of driven cylinder will be strengthened, and when printing thick continuous paper, a little less than will transferring when it plays relay than the printing single-sheet stationery, to use when it uses continuous paper really and drag the paper device, so even the bullet relay of driven cylinder is very weak also passable.According to the thickness of printing paper the power of the bullet relay of driven cylinder is adjusted at present and generally be to use o, after by this o desirable intensity being adjusted in the bullet relay of driven cylinder, also must in solenoid, continue to have electric current produce magnetic field make play relay remain on the fixed position, its solenoid also will remain on magnetic field state, not enough power saving.

Summary of the invention

After the object of the present invention is to provide a kind of its driven cylinder to be adjusted to the intensity of suitable bullet relay, be under the non-magnetic field state even the power supply of CD-ROM drive motor is cut off, the bullet relay of driven cylinder also can keep the printer of the saving electric power of suitable power.

The technical solution adopted for the present invention to solve the technical problems is:

Printer, comprise the lettering portion that printhead and marking roll are formed, be respectively equipped with front wheel driving cylinder, rear driving drum that the mode that drives with rotation turns round and the driven cylinder of preceding driven cylinder and back that connects with each head roll bullet before and after the lettering portion, preceding driven cylinder, the driven cylinder in back pass through guiding mechanism adjustment and the front wheel driving cylinder of below, the bullet relay between the rear driving drum separately; Guiding mechanism is by playing front spring, the rear spring of relay between driven cylinder before transmitting, the driven cylinder in back and following front wheel driving cylinder thereof, the rear driving drum and regulating separately the driving mechanism of the deflection of spring and form; The driving mechanism of deflection is with the gear train transmission, with drive motor, and has at least in the gear train between one group of gear and the fulcrum and only to allow unidirectional rotation by clutch part and can not reverse rotation.

The invention has the beneficial effects as follows: owing on driven cylinder, guiding mechanism is installed, the bullet relay of driven cylinder can be set to the thickness that is suitable for paper, simultaneously, even the power supply of CD-ROM drive motor is cut off, under the non-magnetic field state, effect by one-way clutch, gear train still can remain on the position that sets, and the bullet relay of driven cylinder is constant, still adapts to the thickness of printing paper, the electric current that CD-ROM drive motor need not continue is saved electric power.

Description of drawings

The invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of the bullet relay of driven cylinder of the present invention guiding mechanism when being in the most weak state;

Fig. 2 is the structural representation of the bullet relay of driven cylinder of the present invention guiding mechanism when being in the strongest state.

The specific embodiment

With reference to Fig. 1, Fig. 2, this printer setup has lateral paper guide 10, be provided with two word car guide shafts 30 (illustrating) between the top of lateral paper guide 10, the biside plate 20, word vehicle frame 40 can move freely on word car guide shaft 30, and printhead 50 is installed on the word vehicle frame 40, and paper guiding device 51 is equipped with in the lower end of printhead 50, word vehicle frame 40 moves around along word car guide shaft 30, the print meedle that drives in the printhead 50 moves around, and clashes on the marking roll thereunder 60, thereby word is printed on the paper.The front end of printer is provided with the paper platform 70 that uses single-sheet stationery, below paper platform 70, have use continuous paper drag paper device 80, the leading section of the paper platform 70 during with single-sheet stationery has up and down paper injection plate 71, when use drags paper device 80 to drag continuous paper, paper injection plate 71 is upwards opened, and continuous paper is delivered between printhead 50 and the marking roll 60.

Be respectively equipped with the conveyer of single-sheet stationery and continuous paper at paper feed end, paper delivery end.At the paper delivery end, this conveyer is made up of front wheel driving cylinder 1 and preceding driven cylinder 2; At the paper feed end, this conveyer is made up of the driven cylinder 21 of rear driving drum 11 and back, and front wheel driving cylinder 1, rear driving drum 11 and preceding driven cylinder 2, the driven cylinder 21 in back are carried single-sheet stationery or continuous paper clamping.Front wheel driving cylinder 1 is connected below paper guiding device 51 with rear driving drum 11, and drive by reversible drive motors (not looking among the figure), upper surface at front wheel driving cylinder 1, rear driving drum 11 is connected with preceding driven cylinder 2, the driven cylinder 21 in back by playing relay, and driven cylinder is driven by head roll and rotates.

The present invention is respectively at preceding driven cylinder 2, on the driven cylinder 21 in back independent bullet relay guiding mechanism is installed, and this guiding mechanism is a front spring 31 from the relay of head roll bullet to driven cylinder that transmit, rear spring 61 and the driver part that can adjust spring force, driver part comprises gear 25, arm 26, guide groove 27, gear 47, arm 48, guide groove 49, the gear 37,22 of transmission in the middle of also comprising, 23,24,41,43,44 and the pulsed drive motor 100,200 of unidirectional rotation.

Before the gear train structure of bullet relay guiding mechanism of driven cylinder 2 as follows, the driving shaft of CD-ROM drive motor 100 cog 37 with gear 22 interlocks, gear 22 again with pinion 23 interlocks, with the gear 24 of pinion 23 coaxial interlocks again with gear 25 interlocks.

Being constructed as follows of the deflection driving mechanism of spring: the outer periphery of gear 25 is equipped with a rotating shaft 35, in this rotating shaft 35 arm 26 is arranged, and the upper end of arm 26 is provided with rotating shaft 36, moves around in the guide groove 27 that rotating shaft 36 can be provided with on side plate 20.One end and the rotating shaft 36 of front spring 31 are joined, the other end joins with an end that plays relay adjusting lever 32, adjusting lever 32 33 swings around the shaft, the lower end of adjusting lever 32 has mounting groove, axle 34 on the driven cylinder 2 is packed in the mounting groove, and preceding driven cylinder 2 is regulated by the deflection of front spring 31 with the bullet relay of front wheel driving cylinder 1.

Simultaneously, in the gear train that transmits CD-ROM drive motor 100 power, be provided with the one-way clutch of can unidirectional rotation and can not reverse rotation between gear 24 and the fulcrum 23 thereof, below gear, be provided with photoelectric sensor 28.The bottom plane of structure of the transmitting terminal of photoelectric sensor 28 and the arm between the receiving terminal 26 cuts off the light of transmitting terminal, and when sensor detected this cut-out light, the bullet relay guiding mechanism of driven cylinder 2 just arrived the reference position.

Shown in Figure 1, when when dragging paper device 80 that continuous paper is supplied to printer, the bullet relay of preceding driven cylinder 2 must be turned down as far as possible.CD-ROM drive motor 100 rotates,

gear train

37,22,23,24 transmissions, be transmitted to gear 25, make arm 26 move to the lowermost end of guide groove 27, the crosscut between the transmitting terminal of photoelectric sensor 28 and receiving terminal of the bottom of arm 26 is disconnected, and CD-ROM drive motor 100 just stops operating, at this moment, the upper end of arm 26 and rotating shaft 36 are on the lowermost end position of guide groove 27, the front spring 31 of annular pulling force is in short status, and it is minimum that the bullet relay of adjusting lever 32 reaches, and the bullet relay of driven cylinder 2 relative front wheel driving cylinders 1 is a minimum before this moment.

From paper platform 70 to the printer supply single-sheet stationery time, the disconnected bottom that arrives of the bottom of arm 26 crosscut between the transmitting terminal of sensor 28 and receiving terminal, CD-ROM drive motor 100 startings, and with this position as benchmark according to the umber of pulse that sets begin the rotation,

gear train

37,22,23, the rotation of 24 travelling gears, 25 clockwise directions, arm 26 just rises to the top from the bottom position of guide groove 27, front spring 11 is tightened up, and by adjusting lever 32 transmissions, preceding driving drum 2 reaches maximum with the bullet relay of front wheel driving cylinder 1.

Because front spring 31 has restoring force, arm 26 travelling gears 25 can appear, the phenomenon that gear 24 reverses is provided with an one-way clutch between gear 24 and the fulcrum 23, now even the power supply of CD-ROM drive motor 100 is cut off like this, be in the non-magnetic field state, when static moment does not change,

gear train

37,22,23,24 can both remain on the fixed position.

At the paper feed end, the guiding mechanism basic comprising of the bullet relay of the driven cylinder 21 in back with top mention to go out paper end portion identical in fact, form by spring with the deflection driving mechanism of gear train transmission and drive motor.In the gear train of guiding mechanism, driven wheel of CD-ROM drive motor 200 41 and gear 42 interlocks, gear 42 be by in-line gears 43 and gear 44 interlocks, gear 44 interlocks again with pinion 45 interlocks, with the gear 46 and gear 47 interlocks of these pinion 45 coaxial interlocks.The driving mechanism of regulating spring variable is that a rotating shaft 57 is arranged near the periphery of gear 47, arm 48 57 rotations around the shaft, and the upper end of arm 48 is provided with rotating shaft 58, and this rotating shaft can be slided in the crooked guide groove 49 on side plate 20.One of torsion rear spring 61 terminates in the rotating shaft 58, and the other end is connected on the adjusting lever 62, and adjusting lever 62 can be around axle 63 rotation, and below holddown groove is arranged, the driven cylinder 21 in back is installed in the groove by axle 64, elastic force passes to the driven cylinder 21 in back by adjusting lever 62.

In the gear train of the power that is used for transmitting CD-ROM drive motor 200, be provided with the one-way clutch of can unidirectional rotation and can not reverse rotation between gear 46 and the fulcrum 45.

Below gear 47, be provided with photoelectric sensor 90, the structure of this sensor is identical with the structure of top mentioned sensor, be provided with transmitting terminal and receiving terminal, but the bottom crosscut that arm 48 is arranged between two-port is disconnected light is blocked, this occlusion state is exactly the reference position of the bullet relay guiding mechanism of the driven cylinder 21 in back.

The corrective action of bullet relay guiding mechanism of the driven cylinder 21 in back is as follows: as Fig. 1, continuous paper must be transferred to the bullet relay of the driven cylinder 21 in back the most weak by dragging paper device 80 when the printer paper supply, CD-ROM drive motor 200 rotations this moment, with

gear train

41,42,43,44,45,46 transmission and gear 47 is rotated moves down arm 48, the bottom crosscut of this arm is between the transmitting terminal of photoelectric sensor 90 and receiving terminal the time, and CD-ROM drive motor 200 just stops the rotation.The rotating shaft 58 of arm 48 upper ends is in the lowest positions of guide groove 49 at this moment, rear spring 61 is in the state of opening to the greatest extent, the pressure of adjusting lever 62 is the most weak, after the pressure of 21 pairs of rear driving drums 11 of driven cylinder, that is to say that the frictional force between driven cylinder 21 in back and the rear driving drum 11 reaches the most weak.

When single-sheet stationery by paper feeding paper platform 70 during to the printer paper feeding, the crosscut between the transmitting terminal of sensor 90 and receiving terminal of the bottom of arm 48 is disconnected, and with this as the reference position, CD-ROM drive motor 200 is by the umber of pulse rotation that sets, with

gear train

41,42,43,44,45,46 transmissions are rotated gear 47 in a clockwise direction.When the rotating shaft 58 of arm 48 when the state of Fig. 1 becomes Fig. 2 and rises to the apical position of guide groove 49 like that, the open angle of spring leaf 61 diminishes, and makes the resistance of 21 pairs of rear driving drums 11 of the driven cylinder in back become maximum by adjusting lever 62.

Between gear 46 and coaxial wheels 45, be provided with one-way clutch,, be in the non-magnetic field state, do not have static torsion even make the power supply of CD-ROM drive motor 200 be cut off,

gear train

41,42,43,44,45,46 can both remain on the fixed position, save electric power.

In the above-mentioned situation of mentioning, current driven cylinder 2, the resistance of the driven cylinder 21 in back are in maximum, minimum two when extreme, provide the adjustment of umber of pulse to CD-ROM drive motor 100,200, and it will rotate.Certainly, this resistance can divide multistage adjustment, makes resistance be set in suitable state with umber of pulse adjustment.When CD-ROM drive motor 100,200 startings when crosscut is disconnected between the transmitting terminal of sensor 28,90 and the receiving terminal of the bottom of

arm

26,48, and provide specific umber of pulse as benchmark to CD-ROM drive motor 100,200 with this position, resistance just can keep unifying.

In above-mentioned situation, the driven wheel of CD-ROM drive motor 100,200 is by gear train, and the transmission mechanism of gear connecting rod etc. transmits, but also can be other suitable transfer mode.Generally, the electric power loop when CD-ROM drive motor 100,200 starts is one of each motor configurations, and the present invention then can set in turn by a circuit.

Claims

1. printer, comprise the lettering portion that printhead (50) and marking roll (60) are formed, be respectively equipped with front wheel driving cylinder (1), rear driving drum (11) that the mode that drives with rotation turns round and preceding driven cylinder (2) and the back driven cylinder (21) that connects with each head roll bullet before and after the lettering portion, driven cylinder (2) before it is characterized in that, after driven cylinder (21) pass through separately guiding mechanism adjustment and the front wheel driving cylinder (1) of below, the bullet relay between the rear driving drum (11); Guiding mechanism is made up of the driving mechanism of the deflection of the front spring (31), rear spring (61) and each spring of adjusting that play relay between driven cylinder (2) before transmitting, back driven cylinder (21) and following front wheel driving cylinder (1) thereof, the rear driving drum (11); The driving mechanism of deflection is with the gear train transmission, with drive motor, and has at least in the gear train between one group of gear and the fulcrum and only to allow unidirectional rotation by clutch part and can not reverse rotation.