CN201070878Y

CN201070878Y - Automatic printing force regulating apparatus and printer having the device

Info

Publication number: CN201070878Y
Application number: CNU200720104893XU
Authority: CN
Inventors: 李双梅; 周明
Original assignee: YUNNAN NANTIAN ELECTRONIC INFORMATION INDUSTRY Co Ltd
Current assignee: YUNNAN NANTIAN ELECTRONIC INFORMATION INDUSTRY Co Ltd
Priority date: 2007-08-16
Filing date: 2007-08-16
Publication date: 2008-06-11
Anticipated expiration: 2017-08-16

Abstract

The utility model provides a printing strength automatic regulating device which is characterized in that the device consists of a sensor holder with an elastic clamp hook, a detecting head arranged on the top of the sensor holder, a compression spring and a spring seat shaft which are arranged inside the sensor holder and a pressure sensor arranged below the spring seat shaft. Meanwhile, the utility model also provides a printer with the printing strength automatic regulating device. The utility model converts the mechanical variable quantity generated by a printing medium when entering the printer into the current variable quantity which is transmitted to an A/D alternate channel of a main control chip of the printer. The main control chip dynamically adjusts a drive current of a print needle to generate a reasonable printing push so as to obtain a satisfied printing effect, thereby radically solving the problem of the high possibility of the print needle breakage or the bad legibility of printing, etc when the prior printer prints the mediums with different thickness. Besides, the working load of an operator is decreased and the work efficiency is improved.

Description

Printing dynamics automatic regulating apparatus and with the printer of this device

Technical field

The utility model relates to a kind ofly to be adjusted printing dynamics device automatically and with the printer of this device, belongs to printer Design and manufacturing technology field according to print media thickness.

Background technology

Existing impact printer in use when changing the print media of different-thickness, all needs to readjust printhead and goes out gap between dial and the word roller, goes out the needle force degree to obtain a printhead that adapts with print media thickness.Too small when the gap that printhead goes out between dial and the word roller, then print needle impacts dynamics on the word roller with excessive, causes broken needle easily; Otherwise work as excesssive gap, the writing that prints will be unclear, and it is longer that the while syringe needle stretches out guide board, and print needle easily fractures.And the user is to set up on their own according to the thickness of print media and with reference to the associated recommendation value when adjusting this gap usually, is difficult to obtain one and reasonably goes out the needle force degree, causes paper jam phenomenon because of manually adjusting improper toward contact.This carries out industries such as bank that bankbook, bill class print, industry and commerce, the tax for frequent use printer, be quite inconvenient.Owing to will constantly alternately print the various media of different-thickness in the practical operation, can not manually adjust printhead continually and go out the needle force degree, so can only select to impact printhead with stronger dynamics, this not only causes the broken needle fault easily, and has shortened the service life of colour band.Therefore, be necessary prior art is improved.

Summary of the invention

For overcoming existing printer when printing the different-thickness medium, cause deficiencies such as print needle broken needle easily, the utility model provides a kind of difference according to print media thickness, adjusts the device of printing dynamics automatically.

Another purpose of the present utility model is to provide a kind of printer with printing dynamics automatic regulating apparatus.

First purpose of the present utility model is finished by following technical proposal: a kind of printing dynamics automatic regulating apparatus, it is characterized in that its sensor holder by the band elastic fastening hook, be located at the detection head on sensor holder seat top, be located at compression spring and spring base axle in the sensor holder, and the pressure sensor of spring base axle below constitutes.So that the upper and lower displacement amount with detection head produces passes to pressure sensor by the compression spring, thereby mechanical displacement is converted to current change quantity output.

The electrical signal of described pressure sensor is connected to the A/D input of main control chip by reverse follower circuit, integrating amplification circuit, reverse amplification circuit, so that after will representing the current signal of dielectric thickness to amplify through integration, be input to the A/D ALT-CH alternate channel of printer main control chip, be data signal further with analog signal conversion, main control chip is after the thickness information that obtains medium on the type slug, will be according to the size of its value, dynamically adjust the print needle drive current and reasonably impact dynamics, obtain the printing effect of a satisfaction to produce one.

Second purpose of the present utility model finished by following technical proposal: a kind of printer with printing dynamics automatic regulating apparatus, comprise the printer of being with printhead and being positioned at the printing press strip of printhead below, and printing press strip places on the printer lower bearing bracket by spring, it is characterized in that printing the press strip below is provided with by the sensor holder of being with elastic fastening hook, be located at the detection head on sensor holder seat top, be located at compression spring and spring base axle in the sensor holder, and the printing dynamics automatic regulating apparatus of the pressure sensor formation of spring base axle below.

Elastic fastening hook on the described sensor holder places in the draw-in groove of printer lower bearing bracket correspondence, the detection head on sensor holder seat top passes the printer lower bearing bracket and links to each other with printing press strip bottom, by the detection head that links to each other with type slug, with the caused type slug amount of movement of print media varied in thickness, be delivered to the enterprising row buffering of compression spring, vibration damping, remake and be used for pressure sensor, the variable quantity that the variable quantity of print media thickness can be converted to electric current outputs to the A/D ALT-CH alternate channel of printer main control chip, be data signal further with analog signal conversion, and by the size of main control chip according to its value, dynamically adjust the print needle drive current and reasonably impact dynamics, obtain the printing effect of a satisfaction to produce one.

The utility model compared with prior art has following advantage and effect: adopt such scheme, can be according to the print media of different-thickness, by printer the time, make and print press strip and produce moving downward or upward, this amount of movement changes the A/D ALT-CH alternate channel that current change quantity is transported to the printer main control chip into by the pressure sensor of printing the press strip below, be data signal further with analog signal conversion, main control chip is after the thickness information that obtains medium on the type slug, will be according to the size of its value, dynamically adjust the print needle drive current and reasonably impact dynamics to produce one, obtain the printing effect of a satisfaction, fundamentally solved existing printer when printing the medium of different-thickness, easily cause the print needle broken needle, or problem such as printing writing is unclear, alleviate operating personnel's live load simultaneously, increase work efficiency.

Description of drawings

Fig. 1 is a printing dynamics automatic regulating apparatus structural representation of the present utility model;

Fig. 2 is the printer arrangement schematic diagram that band of the present utility model is printed the dynamics automatic regulating apparatus;

Fig. 3 is circuit theory diagrams of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

Printing dynamics automatic regulating apparatus 6 of the present utility model is by the sensor holder 12 of band elastic fastening hook 13, be located at the detection head 7 on 12 tops of sensor holder, be located at compression spring 8 and spring base axle 9 in the sensor holder 12, and the pressure sensor 10 of spring base axle 9 belows constitutes, pressure sensor 10 is fixed on the sensor holder 12, as Fig. 1 by base plate 11.The variation of print media thickness will force type slug 3, detection head 7 to move up or down, this displacement is behind overcompression spring 8 bufferings, vibration damping, act on the pressure inductor 10 by spring base axle 9, just the variation of print media thickness can be converted to the variation of electric current.

The output signal 14 of type slug pressure sensor 10 is connected to the A/D passage of main control chip by reverse follower circuit 15, integrating amplification circuit 18, reverse amplification circuit 19, carries out the conversion of analog to digital signal.The effect that dielectric thickness detects control signal 22 is to make integrating amplification circuit 18 effective or invalid, purpose is the signal 14 of flexible processing type slug pressure sensor 10, can shield integral action for very thick medium like this, stop the supersaturation of dielectric thickness signal.Zener diode 20 be connected on dielectric thickness signal 21 to power end and end over the ground, to guarantee that dielectric thickness signal 21 is between input range 0～3.3V that the A/D passage allows, as Fig. 3.

The printhead 1 and the spacing roller 2 on it of printer are fixed on the guide rod, printing press strip 3 is fixed on the printer lower bearing bracket 5 by spring 4, printing dynamics automatic regulating apparatus 6 is fixed in the draw-in groove of printer lower bearing bracket 5 by the grab 13 on its top, the detection head 7 of printing dynamics automatic regulating apparatus 6 passes printer lower bearing bracket 5 and links to each other with the bottom of printing press strip 3, as Fig. 2, when print media thickness changes, type slug 3 will move up or down, this displacement will be printed the variation that dynamics automatic regulating apparatus 6 is converted to electric current, after amplifying processing, be sent to the printer main control chip then, main control chip will further represent this current signal of dielectric thickness to carry out mould/number conversion, and dynamically adjust the print needle drive current according to this value, reasonably impact dynamics to produce one.

Claims

1. print the dynamics automatic regulating apparatus for one kind, it is characterized in that its sensor holder, be located at the detection head on sensor holder seat top, be located at compression spring and spring base axle in the sensor holder, and the pressure sensor of spring base axle below constitutes by the band elastic fastening hook.

2. printing dynamics automatic regulating apparatus according to claim 1 is characterized in that the electrical signal of described pressure sensor is connected to the A/D input of main control chip by reverse follower circuit, integrating amplification circuit, reverse amplification circuit.

3. printer with printing dynamics automatic regulating apparatus, comprise the printer of being with printhead and being positioned at the printing press strip of printhead below, and printing press strip places on the printer lower bearing bracket by spring, it is characterized in that printing the press strip below is provided with by the sensor holder of being with elastic fastening hook, be located at the detection head on sensor holder seat top, be located at compression spring and spring base axle in the sensor holder, and the printing dynamics automatic regulating apparatus of the pressure sensor formation of spring base axle below.

4. band according to claim 3 is printed the printer of dynamics automatic regulating apparatus, it is characterized in that the elastic fastening hook on the described sensor holder places in the draw-in groove of printer lower bearing bracket correspondence, the detection head on sensor holder seat top passes the printer lower bearing bracket and links to each other with printing press strip bottom.