CN2155045Y - Full automatic passive printer sharer - Google Patents

Abstract

The utility model relates to a full automatic passive printer sharer, relating to a printer, which belongs to the field of the peripheral equipment of a computer. The utility model is composed of a host interface 1, a voltage processor 2, a controller 3, a converting switch 4, and a printer interface 5. Signals of the computer and the printer are used for power supply after the after-treatment, and an alternating current power supply does not need. The bilateral switching of the computer-the printer can be completed by the full automatic mode, and the device sharing can be realized.

Description

Full automatic passive printer sharer

The utility model relates to printer, belongs to field of computer peripherals.

Printer is a kind of icon output device commonly used as computer peripheral.General user often has many computing machines, and is equipped with a spot of printer; But computing machine also can need to be equipped with the plurality of printers of different model, so-called resource sharing that Here it is sometimes.Adopt the printer shared device can realize that the equipment between main frame and printer is shared.The existing printer shared device generally has two kinds: mechanical switch formula and charged source electronic switch formula.Before a kind of be simple manual control switch conversion; A kind of employing electronic technology conversion in back.The defective of these two kinds of equal various degrees of printer shared device: the mechanical switch formula needs the artificial selector switch of rotating in use, finishes translation function, and efficient is low, rapid wear, and trouble and present computer technology are incompatible; Charged source electronic switch formula printer shared device, owing to used the 220V alternating current, dangerous, shared device equipment easy break-down, and therefore can damage computing machine and printer interface chip, cause bigger loss.In addition, during actual the use often switch computing machine and printer power supply, and forget switch shared device switch, use trouble, security and poor reliability.

The purpose of this utility model provides a kind of full-automatic passive printer shared device, it can realize computing machine---the conversion between the printer automatically easily, fundamentally solve the resource sharing problem of computing machine and printer, and security, the reliability of computer system operation are protected.

The full-automatic passive printer shared device of the utility model is made of host interface 1, voltage processor 2, controller 3, switch 4 and printer interface 5.Voltage processor 2 is by host interface 1 and printer interface 5, with initializing signal I, the gating signal S of main frame, online signal ij and printer recall signal l through diode D and the voltage stabilizing of capacitor C rectifying and wave-filtering as operating voltage V _DD4.3V, make the cmos circuit operate as normal in the switch 4.Therefore needn't use independent power supply power supply.Controller 3 is by containing monostable circuit U ₉, U ₁₀Self-locking device, contain the U of rejection gate ₁₁, U ₆, with the door U ₆Interlock and scrambler U ₁₂Form, from initializing signal I, the gating signal S of host interface 1, through resistance R _S1R _S2Meet V _DD, send into the input end U of controller 3 ₇, triggering contains U ₉, U ₁₀Self-locking device realize self-locking, as rejection gate U ₁₁, U ₆When input end had a signal effective, its output was just blocked and door U ₈Realize interlocking, scrambler U ₁₂Adopt 4 inputs, 2 coding outputs, switch 4 selects an analog switch U by N ₁～U _NForm, by scrambler U ₁₂The input electronegative potential realizes that N selects one switching controls.Thereby realized the automatic work of equipment.

The utility model has following advantage: 1, and passiveization.Need not to add AC power, improved the security and the reliability of computer system operation; 2, fully automatic working.Need not manual intervention.Having overcome present active printer shared device also needs the defective of switch shared device power supply behind switching computer, printer.

Accompanying drawing 1 is the block diagram that the utility model multiple host connects 1 printer;

Fig. 2 is the block diagram that 1 main frame of the utility model connects plurality of printers;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is an electrical schematic diagram of the present utility model.

Now be described with reference to the accompanying drawings embodiment of the present utility model:

The utility model is made up of host interface 1, voltage processor 2, controller 3, switch 4 and printer interface 5.Host interface 1 has A, B, C ... N interface (N is the integer greater than 1), to connect A, B, C ... N platform main frame, printer interface 5 connects 1 printer.Otherwise printer interface 5 also can have A ', B ', C ' ... the individual interface of N ' is to connect A ', B ', C ' ... N ' platform printer, and host interface 1 connects 1 main frame.N pilot lamp L correspondingly arranged, as A when work in the host interface 1, correspondingly pilot lamp L on the panel on the panel _ABright.Voltage processor 2 is by host interface 1 and printer interface 5, and the recall signal l of initialize signal I, the gating signal S of main frame, online signal ij and printer is obtained 4.3V operating voltage V through diode D and the voltage stabilizing of capacitor C rectifying and wave-filtering _DD, drive the cmos circuit operate as normal in the switch 4.Controller 3 comprises and contains monostable circuit U ₉, U ₁₀Self-locking device, contain the U of rejection gate ₁₁, U ₆, with the door U ₈Interlock and scrambler U ₁₂Switch 4 selects an analog switch U by N ₁～U _NForm, by scrambler U ₁₂The output electronegative potential realizes that N selects one switching controls.Printer interface adopts standard C ENTRONICS interface, is suitable for 3070, M1724,24 pins, 9 needle printers and various laser printers such as LQ ' series and FX-80, FX-100.Switch 4 is made up of N piece 4052 analog switches, respectively to I, S signal and data-signal D ₀～D ₇Automatically switch, it is by the scrambler U of controller 3 ₁₂Output signal control, certain main frame and printer are connected, carry out data and transmit, print; The effect of controller 3 is: (1) control transformation switch 4 automatic switchover passages; (2) when 1 main frame uses printer, guarantee that print result is complete; (3) when taking printer, do not interrupted by 1 main frame by another main frame; (4) nonpreemption rank, who sends print request earlier, and who takies printer earlier.Corresponding every main frame has a self-locking device, realizes self-locking, when main frame sends I, S signal, through not gate U ₇With door U ₈Control triggers U ₉, U ₁₀Self-locking device, under the S signal constantly triggers, make self-locking device keep noble potential, through rejection gate U ₁₁, block and door U ₈, go to trigger with the S signal that stops all the other main frames, realize interlocking.Kept this state always before 1 main frame withdraws from printing, print when this main frame and finish, signal S just stops, and self-locking device is just got back to zero condition, allows all the other main frames to remove to trigger corresponding monostable circuit, occupies printer, and monostable circuit output is through scrambler U ₁₂Remove control transformation switch 4, print control signal from multiple host, through self-locking and interlocking, allow 1 main frame to take printer and do not interrupted by other main frame, after 1 main frame printing finishes to withdraw from, just allow other to take printer by 1 main frame, under the effect of controller 3, switch 4 automaticallyes switch, and makes printer timesharing ground be N platform host work.

Embodiment 2:1 platform main frame connects several printers.This configuration is mainly used in copy editor, composing, light printing typesetting system, this type systematic stylus printer commonly used is printed sample manuscript, print final version or film with laser printer, use frequently because print sample manuscript, and accuracy requirement is low, so use cheap stylus printer, laser printer precision height, price is also high, be to reduce the loss of valuable equipment, so generally only be used to finalize a text or the output print of film.

Claims (2)

1, full-automatic passive printer shared device comprises host interface (1), printer interface (5), it is characterized in that also comprising voltage processor (2), controller (3) and switch (4); Voltage processor (2) is by host interface (1) and printer interface (5), with initializing signal I, the gating signal S of main frame, online signal ij and printer recall signal l, through diode (D) and the voltage stabilizing of capacitor (C) rectifying and wave-filtering as operating voltage (V _DD), driving cmos circuit operate as normal in the switch (4), controller (3) is by containing monostable circuit (U ₉, U ₁₀) self-locking device, contain rejection gate (U ₁₁, U ₆) and a door (U ₈) interlock and scrambler (U ₁₂) form, from initializing signal I, the gating signal S of host interface (1), through resistance R _S1, R _S2Insert V _DD, guarantee that init state is input end (U high, that send into controller (3) ₇), triggering contains U ₉, U ₁₀Self-locking device realize self-locking, as rejection gate (U ₁₁, U ₆) when input end had a signal effective, its output was just blocked and door (U ₈), realize interlocking, scrambler (U ₁₂) adopt 4 inputs, 2 coding outputs, switch (4) selects an analog switch (U by N ₁～U _N) form, by scrambler (U ₁₂) output LOW voltage realizes that N selects one switching controls.

2, printer shared device according to claim 1 is characterized in that the capacitor (C) in the voltage processor (2), and its range of capacity is 10～200 μ f.

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