Bill printer core
Technical field
The utility model relates to the printing field, the bill printer core that especially a kind of bill printer uses.
Background technology
The Automatic Teller Machine of bank, the cashier in supermarket are provided with bill printer mostly, are used for printing transaction strip or receipt.Bill printer has a casing usually, a movement is installed in casing, existing bill printer core is comprised of printhead, support and paper cutter, and wherein printhead is installed in the top of support, and paper cutter is installed in a side of support and printhead.Form a paper feed passage between printhead and support, thermal printing paper passes the paper feed passage.
Have the structure of bill printer core now as shown in Figure 1, support 1 upper end is equipped with a rubber roll 11, and is provided with motor in the support, and motor drives the rubber roll rotation by transmission mechanism.The lower end of printhead 2 is provided with heat-sensitive sheet, and heat-sensitive sheet arranges over against rubber roll 11, is used for heat-sensitive sheet thermal printing paper is added thermosetting literal and pattern.Rubber roll 11 and heat-sensitive sheet are separately positioned on the both sides of paper feed passage, and when thermal printing paper passed the paper feed passage, rubber roll 11 and heat-sensitive sheet were with the thermal printing paper holding, and the larger frictional force of formation between thermal printing paper and the rubber roll 11.When rubber roll 11 rotation, drive thermal printing paper by frictional force and move forward, advance thereby promote thermal printing paper.
Heat-sensitive sheet is arranged on the heat-sensitive sheet support 21, the two ends of heat-sensitive sheet support 21 are provided with auricle with holes 22, then wearing axle 23 by the hole is fixed on the printhead 2 heat-sensitive sheet support 21, and make heat-sensitive sheet face rubber roll 11, axle 23 two ends also need arrange draw-in groove simultaneously, after axle 23 installed, two ends also need be installed floor clip 24 and be deviate from the mount fixing structure complexity of heat-sensitive sheet support 21 and required precision height to prevent axle 23 from printhead 2.
In addition, because the need of work of bill printer is often changed thermal printing paper, therefore existing bill printer core often need to disassemble printhead from support, and has accurate mechanism in the printhead, and dismounting causes the damage of printhead easily frequently.In addition, because printhead and support need accurately to locate when using, in case user's Rig up error voluntarily causes printhead can't cooperate with support, cause bill printer not use.
Summary of the invention
Main purpose of the present utility model provides a kind of heat-sensitive sheet supporting structure simply and installs and fixes easily bill printer core.
Another purpose of the present utility model provides a kind of bill printer core that printhead is replaceable thermal printing paper that need not to dismantle.
For realizing above-mentioned main purpose, the bill printer core that the utility model provides comprises: have the support of pedestal, be provided with motor in the pedestal; Rubber roll, motor drives the rubber roll rotation by transmission mechanism; The heat-sensitive sheet support, its side over against rubber roll is provided with heat-sensitive sheet; Paper cutter comprises flat blade and sliding blade.Wherein, the heat-sensitive sheet support is installed in the pedestal, and vertical two ends of heat-sensitive sheet support have lug, and lug is arranged in the chute of pedestal both sides, also is provided with stage clip in the pedestal, and the first end of stage clip is fixed on the pedestal, the second end and heat-sensitive sheet support butt.
By above scheme as seen, the heat-sensitive sheet support cooperates with chute on the pedestal by the lug of its end and is installed in the pedestal, when installation or removal heat-sensitive sheet support, an end of pressing the heat-sensitive sheet support makes heat-sensitive sheet riding, the lug at its two ends enters in the chute or deviates to realize installation or removal from chute, and the heat-sensitive sheet supporting structure is simple and install and fix conveniently.
More concrete scheme is that transmission mechanism is gear train, and an end of rubber roll is provided with and the gear train meshed gears.Be understandable that transmission mechanism also can be band transmission, chain transmission etc.
Preferred scheme is that rubber roll is installed on the detachable member, and detachable member removably is connected with pedestal by the roll shaft of rubber roll, be provided with on the detachable member and pedestal between the paper guide block of formation paper feed passage.
By above scheme as seen, by rubber roll removably is connected with pedestal, make when changing thermal printing paper, only need the detachable member of dismounting fixed installation rubber roll to get final product, printhead can be arranged in the pedestal and need not dismounting, thereby can the precision mechanism in the printhead not exerted an influence, the installation accuracy of detachable member is less demanding, as long as its end gear can and drive rubber roll with the gear train engagement and rotate, it is convenient and simple to operate to change thermal printing paper, thereby realizes another purpose of the present utility model.
More concrete scheme is the locked component that is provided with the fixing and demolition detachable member on the pedestal, and locked component has the section of closing of colluding of closing roll shaft of colluding, and realizes the fixing of the relative support of detachable member by locked component, realizes stable the printing.
Scheme is that locked component comprises the rotating shaft that is rotatably mounted on the pedestal more specifically, is fixed in the rotating shaft and is provided with the hook member that colludes the section of closing, and force to collude and close part and collude the forcing piece that closes with roll shaft.When the dismounting detachable member, the power that overcomes forcing piece makes colludes the section of closing and roll shaft disengaging, can disassemble detachable member.After detachable member is in place, discharge the power be applied to forcing piece, collude the section of closing and under the effect of forcing piece, collude with roll shaft and close, realize fixing to detachable member.
Further scheme is that forcing piece is torsion spring, is arranged in the rotating shaft, and an end is fixed on the hook member, the other end and heat-sensitive sheet support butt, and make the heat-sensitive sheet support pressure to rubber roll.As seen from the above, torsion spring colludes the section of closing and colludes and close the roll shaft except making, and also can play further forcing the heat-sensitive sheet support pressure to the effect of rubber roll.
Another further scheme is that hook member is two, lays respectively near in the both ends pedestal of rotating shaft, and is provided with the press section at least one hook member.As seen from the above, the two ends of roll shaft are all fixed by hook member, thereby the relative support of roll shaft stability is better, make and collude the section of closing and collude with the roll shaft disengaging and close by apply power in the press section, make things convenient for the dismounting of detachable member.
More concrete scheme is that detachable member is installed in the support front end.Detachable member can forwards be dismantled, easy installation and removal.
Another more concrete scheme is that flat blade is fixed on the detachable member, and sliding blade is fixed on the pedestal slidably.When changing thermal printing paper, flat blade is pulled down with detachable member, and the replacing of thermal printing paper is more convenient.
Preferably, the sidewall of pedestal is equipped with microswitch near colluding He Buchu, and roll shaft is installed to described colluding and touches microswitch when closing section.Be in place by microswitch notice note printer rubber roll.
Description of drawings
Fig. 1 is the STRUCTURE DECOMPOSITION figure of existing bill printer core.
Fig. 2 is the structure chart of the utility model embodiment.
Fig. 3 is the STRUCTURE DECOMPOSITION figure of the utility model embodiment.
Fig. 4 is the STRUCTURE DECOMPOSITION figure of detachable member among the utility model embodiment.
Fig. 5 is the STRUCTURE DECOMPOSITION figure of support among the utility model embodiment.
The utility model is described in further detail below in conjunction with drawings and Examples.
The specific embodiment
As shown in Figures 2 and 3, bill printer core comprises support 3 and the detachable member 4 that removably is connected with support 3, form the paper feed passage between support 3 and the detachable member 4, detachable member 4 is arranged on the front end of support 3, and paper cutter is arranged on the top of support 3 and detachable member 4.Support 3 comprises the openable pedestal 31 in bottom, pedestal 31 has opening towards detachable member 4, printhead is arranged in the pedestal 31, heat-sensitive sheet 71 as a printhead part is arranged on opening part, has stage clip in the pedestal 31, stage clip and the heat-sensitive sheet support butt that heat-sensitive sheet 71 is installed, so that heat-sensitive sheet 71 is pressed to opening, the opening below is for leading paper 32 to the opening inclination.
Referring to Fig. 4, detachable member 4 comprises rubber roll bracket 41, rubber roll bracket 41 belows are provided with paper guide block 42, flat blade 43 is arranged on the top of rubber roll bracket 41, be installed on the rubber roll bracket 41 by flat cutter holder 44, also be provided with cutting knife shell fragment 45 and tower spring between flat blade 43 and the flat cutter holder 44.Rubber roll 46 is rotatably mounted on the rubber roll bracket 41 by the roll shaft 47 at its two ends, and the one end is equipped with the gear 48 that receives driving force.
Referring to Fig. 5, drive the motor 5 of sliding blade 57 slips and the motor 6 of driving rubber roll rotation and all be installed in the pedestal 31.Motor 5 drives worm gear 52 rotations by the worm screw 51 of one end, and worm gear 52 upper ends are provided with gear 53, blade driven wheel 54 and gear 53 engagements, and the top of blade driven wheel 54 is provided with sprocket 55.Sliding blade 56 is slidably mounted on the upper side wall of pedestal 31, be provided with U-shaped hole 57 on the sliding blade 56, sprocket 55 is arranged in the U-shaped hole 57, U-shaped hole 57 vertically vertical with the glide direction of sliding blade 56 moves back and forth along glide direction thereby the rotation of blade driven wheel 54 can drive sliding blade 56.The sliding blade 56 outer cover plates 58 that also are provided with protection sliding blade 56.
Motor 6 rotates by its end gear 61 driven gears system, and the gear 62 in the gear train can mesh with rubber-covered roll gear, rotates thereby drive rubber roll.Gear train also is provided with gear cover plate 63 outward and is used for gear train is protected.
Be provided with heat-sensitive sheet 71 on the heat-sensitive sheet support 7, heat-sensitive sheet 71 is over against rubber roll, vertical both ends of heat-sensitive sheet support 7 are provided with lug 72, the chute 33 interior slips that lug 72 can arrange in the two side of pedestal 31, also be provided with stage clip 37 in the pedestal 31, one end of stage clip 37 is fixed on the pedestal 31, and the other end and heat-sensitive sheet support 7 butts make heat-sensitive sheet 71 press to rubber roll in order to apply pressure to heat-sensitive sheet support 7.During from pedestal 31 dismounting heat-sensitive sheet support 7, the elastic force that an end of pressing heat-sensitive sheet support 7 overcomes stage clip 37 makes this end mobile backward, thereby heat-sensitive sheet support 7 is tilted, the lug 72 of the one or both ends of heat-sensitive sheet support 7 namely can be deviate from the chute 33 of pedestal 31, heat-sensitive sheet support 7 can take off, and the fitting operation step of heat-sensitive sheet support 7 in contrast.
Be provided with on the pedestal 31 for the locked component of installing and dismantle detachable member, locked component comprises rotating shaft 81, hook member 82 and torsion spring 86, and the both ends of rotating shaft 81 are set to non-circular.In the present embodiment, the end of rotating shaft 81 is the truncated cone-shaped with two sections, is understandable that roller end can be set to arbitrarily non-circular shape.Hook member 82 is provided with the non-circular hole that cooperates with rotating shaft 81 ends, thereby hook member 82 rotate thereupon when rotating shaft 81 rotation, and the hole 34 of the installation rotating shaft 81 that arranges on the pedestal 31 is circle, thus rotating shaft 81 relatively pedestal 31 be installed in rotatably on the pedestal 31.One end of torsion spring 86 is fixed on the draw-in groove 85 of hook member 82, the other end and heat-sensitive sheet support 7 butts, and apply and be depressed into heat-sensitive sheet support 7 and make heat-sensitive sheet 71 press to rubber roll.Be provided with on the hook member 82 and collude the section of closing 83 of colluding of closing with the rubber roll roll shaft and press to make and collude the press section 84 that the section of closing 83 and roll shaft break away from.
Referring to Fig. 3 and Fig. 4, when changing thermal printing paper, applying external force 84 makes and colludes the locking that the section of closing 83 and roll shaft 47 break away to remove 82 pairs of detachable members 4 of hook member to the press section, can realize the dismounting of detachable member 4, release is to the pressure of press section 84, and hook member 82 goes to original position at the resilient force backspin of torsion spring 86.After more finishing changing thermal printing paper, apply external force to the press section 84, make the opening that colludes the section of closing 83 corresponding with the guiding groove 35 on the pedestal 31, after roll shaft 47 is in place by guiding groove 35, rubber-covered roll gear 48 and gear 62 engagements, roll shaft 47 triggers microswitch 9 simultaneously, rotation detachable member 4 is fitted the step surface 36 of rubber roll bracket 41 lower surfaces and pedestal 31 both sides, release is to the external force of press section 84, hook member 82 rotates to make under torsion spring 86 resilient force and colludes the section of closing 83 and collude with roll shaft 47 and close, thereby realizes the locking to detachable member 4.
When bill printer core is worked, thermal printing paper enters from paper guide block 42 and the paper feed channel led between the paper 32, in the time of between process heat-sensitive sheet 71 and the rubber roll 46,71 pairs of thermal printing paper local heat of heat-sensitive sheet, rubber roll 46 rotates under the driving of motor 6, making rubber roll 46 drive thermal printing paper by the frictional force between rubber roll 46 and the thermal printing paper moves, heat-sensitive sheet 71 is constantly realized printing to form corresponding literal or pattern continuously in the thermal printing paper heating, thermal printing paper passes between sliding blade 57 and flat blade 43, after printing is finished, motor 5 drives sliding blade 57 and slides to flat blade 43, the blade of flat blade setting cuts off thermal printing paper, and then sliding blade 57 drives lower slider to initial position at motor 5.Bill printer core is ready to receive print command next time.
Certainly, above-described embodiment only is the utility model preferred embodiment, and the utility model includes but not limited to this, for example, torsion spring can with the support butt; Sliding blade and driving mechanism thereof are installed on the support with being set to a Whole-dismountable; Use the kinds of drive such as band transmission or chain transmission to drive rubber roll; Detachable member adopts the locked component of other structures such as rotatable buckle etc., all is included in the protection domain of the utility model claim.