CN217495622U

CN217495622U - Label printer

Info

Publication number: CN217495622U
Application number: CN202122611537.XU
Authority: CN
Inventors: 李建国
Original assignee: Beijing Supvan Technology Co ltd
Current assignee: Beijing Supvan Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-09-27
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a label printer, include the shell body and install at its inside label box to and be used for controlling power unit and the control mechanism that label box goes out paper and the carbon ribbon receive and releases, be used for realizing beating printer head that the label printed. The utility model reasonably plans the inner space of the label box, and is provided with a linear type label paper outlet channel and a label returning and releasing space, so as to ensure smooth paper feeding and returning, and prevent the label paper from wrinkling in the returning process; still improve through gear drive system, rely on same motor can realize the forward and reverse rotation of gear, can realize the normal printing of label paper and carbon ribbon, can realize the backspacing of label paper and carbon ribbon again, avoided the waste of label paper and carbon ribbon, improve material utilization. Still through the photoelectric sensor setting from taking reflection prism, reduce label box occupation space, provide the advantage for realizing miniaturized label box. The utility model discloses compact structure, space utilization is high, prints accurate reliable, and application scope is wide.

Description

Label printer

Technical Field

The utility model relates to a label printer field especially relates to a label printer that can just reverse.

Background

At present, thermal transfer label printers all have a thermal transfer ribbon that advances along with label paper in one direction, namely, the paper output direction, and the label paper is torn or cut after printing. At this time, a blank label of a certain length is left between the heating line of the printing head and the cut part of the label paper, and the blank label is not printed. Meanwhile, the thermal transfer ribbon advancing along the blank label section is not used, so that label paper and the thermal transfer ribbon of the blank label section are wasted when the next printing is performed, the material utilization rate is low, and the cost is high.

In addition, the label box of the existing label printer is internally provided with rolled label paper rolls, and the label box mainly comprises continuous label paper and die-cutting label paper. Aiming at different label sticker types, the modes that label paper rolls are wound into rolls in the industry at present are uneven, the problem that the existing label printer is wrinkled after printing is solved, the surface of label facial tissue output by the printer after printing is wrinkled and folded, the use of labels is affected, and the situation that the labels are wrinkled and adhered together seriously can cause that the labels are not used together is avoided.

Also, in order to achieve accurate printing of the die-cut label paper, the spacing between each of the die-cut label facesheets needs to be accurately detected. The prior art methods of detecting the spacing between die cut label facestocks typically use a photosensor. The existing photoelectric sensor comprises a transmitting end and a receiving end which are respectively arranged on two sides of a label sticker, so that the space required by the face-to-face arrangement mode of the transmitting end and the receiving end is large, the cost is high, and the existing photoelectric sensor becomes an obstacle for setting a miniaturized label box.

It is therefore apparent that the above-mentioned conventional label printer has disadvantages and drawbacks in structure, method and use, and further improvements are desired. How can establish a new label printer, make its positive play paper that can realize the label paper tighten up with the carbon ribbon, can realize again that the reverse of label paper moves back paper and the carbon ribbon returns, reduce the waste of label paper and carbon ribbon to can avoid the label paper to arouse the fold at the paper in-process that advances and moves back to even, guarantee the label and print the effect, and guarantee the accuracy nature that the label printed, can become the current industry need the modified target extremely.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a label printer makes its forward play paper that can realize the label paper tighten up with the carbon ribbon, can realize again that the reverse paper that moves back of label paper and carbon ribbon return, reduces the waste of label paper and carbon ribbon, can also avoid the label paper to arouse fold adhesion advancing and moving back the paper in-process, guarantees the label and prints the effect to and guarantee the accuracy nature that the label printed, thereby overcome the not enough of current label printer.

In order to solve the technical problem, the utility model provides a label printer, which comprises an outer shell, a label box arranged inside the outer shell, a power mechanism and a control mechanism for controlling the paper outlet of the label box and the retraction and release of a carbon ribbon, and a printing head for realizing label printing;

the label box comprises an inner shell, and a label paper outlet channel and a carbon ribbon channel which are arranged in the inner shell, wherein the inner shell is divided into a first half area and a second half area, a label paper roll is arranged at the lower part of the first half area, a label returning and releasing space is reserved at the upper part of the first half area, a carbon ribbon supply roll and a carbon ribbon take-up roll are arranged at the lower part of the second half area, a groove for placing the printing head is formed in the upper part of the second half area, the label paper outlet channel is arranged along the uppermost end of the second half area and corresponds to paper outlet lines on the side walls of the inner shell and the outer shell in a straight line mode, the carbon ribbon channel is arranged around the groove, and the carbon ribbon positioned at the opening end of the groove is closely attached to the label paper;

the power mechanism comprises a motor and a gear transmission system, the gear transmission system comprises a first gear set in transmission connection with an output shaft of the motor, a planetary gear set in transmission connection with the first gear set, a printing rubber roll gear set in transmission connection with the planetary gear set and used for driving the label paper to move forward or backward, and a carbon tape winding gear and a carbon tape unwinding gear which are selectively in transmission connection with the planetary gear set; the planetary gear set comprises a sun gear, a planetary gear meshed with the sun gear and a planet carrier connected with the sun gear and the planetary gear, the sun gear drives the planetary gear to rotate under the driving of the first gear set, and under the action of the planet carrier, the planetary gear is meshed with the carbon ribbon winding gear or the carbon ribbon unwinding gear according to the positive rotation or the negative rotation of the sun gear;

the printing rubber roll gear set in the gear transmission system is connected with a printing rubber roll, the printing rubber roll drives the label paper to move through friction force with the label paper, the carbon ribbon winding gear is connected with the carbon ribbon winding roller, the carbon ribbon unwinding gear is connected with the carbon ribbon supply winding roller, when the motor rotates to one side, the first gear set transmits power to the planetary gear set, and the planetary gear set drives the printing rubber roll and the carbon ribbon winding roller to rotate, so that paper discharging of the label paper and tightening of the carbon ribbon are realized; when the motor rotates to the opposite side, the first gear set transmits reverse power to the planetary gear set, and the planetary gear set drives the printing rubber roller and the carbon tape supply roller to rotate, so that the paper returning of the label paper and the recovery of the carbon tape are realized.

Further improve, the label goes out the paper passageway and follows the inboard sharp setting of lateral wall of interior casing, the recess with the lateral wall acutangular angle sets up, the printer head and the carbon ribbon slope contact of the inside setting of recess.

Further improve, the inside support flap that is used for separating half district of first and second of still being equipped with of interior casing, support flap's upper portion sets up takes two at least bellied indent type arc guide plates, all be equipped with a plurality of support columns or supporting roller on label play paper passageway and the carbon ribbon passageway.

In a further improvement, the label paper adopts a continuous label paper roll or a die-cutting label paper roll, and the label surface paper side of the continuous label paper roll or the die-cutting label paper roll is at least contacted with one arc-shaped convex section of the concave arc-shaped guide plate.

The continuous label paper roll is wound into a roll in the direction that the continuous label surface paper faces outwards, and the continuous label surface paper side of the continuous label paper roll is sequentially contacted with the arc-shaped convex sections of the concave arc-shaped guide plate;

the die-cutting label paper roll is wound into a roll in the direction that the die-cutting label surface paper faces inwards, and the die-cutting label surface paper side of the die-cutting label paper roll is in contact with one arc-shaped protruding section of the inwards concave arc-shaped guide plate.

The planetary gear set is further improved, the planetary gear set is further provided with an elastic limiting mechanism, the elastic limiting mechanism comprises an elastic limiting part and a limiting rod which is abutted to the elastic limiting part, one end of the elastic limiting part is connected with the tail of the planet carrier, the other end of the elastic limiting part is popped out towards the outer side of the planet carrier and forms certain tension with the planet carrier, the limiting rod is fixed on the outer shell, and under the stop state of the motor, the elastic limiting part is used for promoting the planet gear to be meshed with the carbon ribbon rolling gear under the interference of the limiting rod.

The improved structure is characterized in that torsion springs which are opposite in rotation direction are arranged inside the carbon tape rolling gear and the carbon tape unwinding gear, and sawteeth used for controlling the rotation of the winding roller are arranged inside the shaft core of the carbon tape supply winding roller and the carbon tape winding roller.

The improved structure is characterized in that a photoelectric sensing mechanism used for detecting labels and a cutter used for cutting and printing label base paper after printing are further arranged inside the outer shell, the photoelectric sensing mechanism, the printing head and the cutter are sequentially arranged on the label paper outlet channel, the distance between the photoelectric sensing mechanism and the printing head is smaller than or equal to the length of a single die-cutting label, and the distance between the printing head and the cutter is the distance between the die-cutting label and the label printing minimum margin distance, wherein the distance between the printing head and the cutter is the distance between the die-cutting label and the label printing minimum margin distance, and the distance between the label cutting end and the die-cutting label rear end is subtracted from the sum of the die-cutting label spacing distance and the label printing minimum margin distance.

The improved structure is characterized in that the photoelectric sensing mechanism comprises a photoelectric sensor and a reflecting prism, wherein the emitting end and the receiving end of the photoelectric sensor are both arranged on the same side of the label paper, the reflecting prism is arranged on the other side of the label paper, and light beams emitted by the emitting end of the photoelectric sensor vertically pass through the label paper and then are reflected by the reflecting prism and then vertically pass through the label paper to be received by the receiving end, so that the detection of the label surface paper is realized.

In a further refinement, the label printer is for die-cut label paper roll, continuous label paper roll, heat shrink tube roll or label strip roll printing.

After adopting such design, the utility model discloses following advantage has at least:

1. the label box of the utility model has the advantages that through reasonably planning the inner space of the shell, the straight label paper outlet channel is arranged in the shell, and the label returning and releasing space is arranged, so that the convenience of paper feeding and paper returning can be ensured, the paper is smooth and is not blocked, and the label paper releasing space is provided, and the label paper is prevented from wrinkling or folding in the returning process; and the inside carbon ribbon of this casing supplies the setting of taking up the winding up roller and carbon ribbon to take up the setting of taking up the winding up roller, makes to receive and unreel compact structure, and the carbon ribbon route is inseparable, and space utilization is high, provides to implement probably for small-size label box.

2. The utility model discloses label printer's gear drive system sets up through the meshing relation between each gear, make this gear drive system rely on same motor can realize the forward and the reverse rotation of gear, but alternative control carbon ribbon rolling gear or carbon ribbon unreel the gear and rotate as the action wheel simultaneously, can enough realize the normal printing of label paper, also can return label paper to the label box in, retrieve the carbon ribbon to the label box simultaneously, the waste of label paper and carbon ribbon has been avoided, and the material utilization rate is improved.

3. Still through setting up the interior structure of label box to different label winding methods settings, can effectively realize that label sticker is further rolled under the state of advancing, overcome the emergence of label facial tissue wrinkle phenomenon. Simultaneously, owing to the setting in release space under the label state of moving back, fold and corrugate when avoiding label sticker to move back like this promotes label printing quality and printing effect.

4. Still through elasticity stop gear's setting, utilize the interference fit of elasticity locating part and gag lever post, make under the motor stall state, elasticity locating part impels planet wheel and carbon ribbon rolling gear meshing, the instantaneity when guaranteeing forward printing.

5. Still through set up soon to opposite torsional spring in carbon ribbon rolling gear and carbon ribbon unreel gear inside, guarantee to tighten up the in-process that the carbon ribbon was withdrawed with the reversal to the positive direction, the homoenergetic remains the carbon ribbon throughout and has certain tension, and the problem of fold can not take place for the carbon ribbon.

6. The utility model discloses the label box realizes on satisfying photoelectric detection's basis through setting up the photoelectric sensor from taking reflection prism, reduces photoelectric sensing mechanism's occupation space greatly, provides the advantage for setting up the label box of miniaturization, convenience, reduces and prints the label box cost.

7. The positions of the photoelectric sensing mechanism, the printing head and the cutter are limited, and the accurate positioning printing method is set, so that the accurate positioning of the printing starting position of the die-cutting label and the accurate positioning of the cutting position of the cutter can be realized, the position of the printing content on each die-cutting label is accurate, the cutter is ensured not to cut on the label surface paper when the die-cutting label is cut, and the method is simple, convenient and reliable to operate and low in cost.

8. The utility model discloses label printer simple structure prints accurate reliable, and is effectual, and application scope is wide.

Drawings

The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

Fig. 1 is a schematic structural diagram of the label printer of the present invention.

Fig. 2 is an internal structure schematic diagram of the paper label box of the label printer of the present invention.

Fig. 3 is the structural schematic diagram of the planetary gear and the carbon ribbon rolling gear meshing in the gear transmission system of the label printer.

Fig. 4 is the structural schematic diagram of the planetary gear and the carbon ribbon unwinding gear meshing in the gear transmission system of the label printer.

Fig. 5 is the utility model discloses the carbon ribbon rolling gear in label printer's gear drive system and carbon ribbon unreel gear inner structure schematic diagram.

Fig. 6 is a schematic view of the inside of the label printer according to the present invention (in the figure, the gear 41 and the gear 47 are in a non-meshed state for clarity).

Fig. 7 is a plan view of the inside structure of the label printer according to the present invention (the gear 41, the gear 42, and the gear 47 are removed for clarity).

Fig. 8 is a schematic view of a structure for guiding label paper of a continuous roll of label paper in the label cassette according to the present invention.

Fig. 9 is a schematic view of a structure for guiding label paper of the label paper roll cut in the label box according to the present invention.

Fig. 10 is a schematic structural diagram of the label box paper photoelectric sensing mechanism of the present invention.

Fig. 11 is a schematic diagram of a label accurate positioning printing method of the label printer of the present invention.

Detailed Description

Referring to fig. 1, the label printer of this embodiment includes a housing 3, a label box 1 installed inside the housing 3, a power mechanism and a control mechanism for controlling paper output of the label box and retraction and release of a thermal transfer ribbon, and a printing head 2 for printing a label.

Specifically, referring to fig. 2, the label cassette 1 in this embodiment includes a housing, and a label discharge path and a ribbon path disposed inside the housing. This label goes out paper passageway and the nearly straight line of exit slot 11 of this casing and corresponds the setting, and this casing is inside still to be equipped with the recess 12 that is used for placing printer head 2, and the open end of this recess 12 is close to this exit slot 11 and sets up, and this ribbon passageway sets up around this recess 12, and the ribbon 20 that is located this recess open end is close to with label paper 10, is convenient for beat printer head 2 and print the label with the heat-transfer mode.

The label box casing is nearly square casing in this embodiment, this square casing is inside to be divided into first half district and the second half district of controlling the distribution, this first half district lower part is equipped with label paper winding up roller 21, the upper portion in this first half district reserves label backspacing release space 22, this second half district lower part is equipped with the carbon ribbon and supplies tape winding up roller 23 and carbon ribbon to take up winding up roller 24, this recess 12 sets up the upper portion in this second half district, and recess 12 and casing upper side wall become certain angle setting, acute angle setting in fig. 2, the printer head 2 that like this inside setting of recess 12 was equipped with is the slope contact with carbon ribbon 20, this setting does benefit to the linear type passageway that realizes label play paper passageway. This exit slot 11 sets up on the upper portion of the vertical lateral wall in this second half district, and this label goes out paper passageway along the topmost in this second half district and with casing side wall parallel arrangement, still corresponds with this exit slot 11 straight line. The printing rubber roller 31 is arranged at the opposite side of the printing head 2 and used for driving the label paper through the friction force with the label paper 10. This linear type label goes out paper passageway and label and rolls back the setting in release space like this, for the retroversion of label paper 10 provides reliable guarantee, can not only realize that label paper rolls back smoothly under the printing rubber roll effect, still rolls back for label paper and provides the release space, prevents that label paper from rolling back the back and wrinkling and folding, influence label paper's printing effect.

All be equipped with a plurality of support columns or supporting roller on this label goes out paper passageway and the carbon ribbon passageway to make label paper 10 and carbon ribbon 20 have certain tension all the time advancing or the process of rolling back, guarantee smooth and easy operation. As shown in fig. 2, the paper output channel of the label is provided with support pillars a1, a2, a3, a4 and a5, and the carbon tape channel is provided with support rollers b1, b2, b3, b4, b5, b6 and b 7.

In this embodiment the label cassette housing is internally provided with a support baffle 13 for separating the first and second halves. The upper portion of this supporting baffle 13 sets to the interior concave type arc guide plate that is used for rolling label paper 10, and this interior concave type arc guide plate takes two at least archs 14, like crescent moon plate structure, enables label paper 10 and in the advancing process, receives rolling of arc arch 14 in succession many times, guarantees the laminating of label facial tissue and base stock, promotes and prints the effect.

In addition, the carbon tape supply/take-up roll 23 and the carbon tape take-up roll 24 are provided with serrations 25 inside the cores thereof for controlling the rotation of the rolls. The saw teeth 25 can be rotated by both manual and electric operations. When the carbon tape winding roller 24 is a driving wheel, the carbon tape supply winding roller 23 is an idle wheel, which is beneficial to the positive tightening of the carbon tape 20; when the tape supply winding roller 23 rotates as a driving wheel, the tape winding roller 24 serves as an idle wheel, which is beneficial to reverse tightening of the carbon tape 20.

Referring to fig. 3 to 7, in this embodiment, the power mechanism includes a motor 4 and a gear transmission system, where the gear transmission system includes a first gear set in transmission connection with an output shaft of the motor, a planetary gear set in transmission connection with the first gear set, a printing rubber roller gear set in transmission connection with the planetary gear set and used for driving the label paper to move forward or backward, and a carbon ribbon winding gear and a carbon ribbon unwinding gear selectively in transmission connection with the planetary gear set.

Specifically, referring to fig. 3, the first gear set includes a first gear 41, and the first gear 41 is a duplicate gear, wherein an outer gear of the duplicate gear is engaged with and driven by an output shaft of the motor to rotate, and an inner gear of the duplicate gear also rotates along with the output shaft of the motor.

Of course, the dual gear in this embodiment may use two gears on the same central shaft, or may be composed of a plurality of gears engaged with each other.

The planetary gear set in this embodiment includes a sun gear 42 and planet gears 43 meshing therewith, and a carrier 44 connecting the sun gear 42 and the planet gears 43. The planetary gear 43 is rotatably mounted on a carrier 44 and revolves around the sun gear 42. The sun gear 42 is also a duplicate gear, the external gear of which is engaged with the internal gear of the first gear 41, and the internal gear of which is engaged with the planet gear 43, so that the sun gear 42 drives the planet gear 43 to rotate under the driving of the first gear 41, and the planet gear 43 also revolves around the sun gear 42. The planet gear 43 can be selectively engaged with the carbon ribbon winding gear 45 or the carbon ribbon unwinding gear 46, when the planet gear 43 drives the carbon ribbon winding gear 45 to rotate, the carbon ribbon unwinding gear 46 is an idle gear, and the carbon ribbon winding gear 45 drives the carbon ribbon 20 to be tightened, as shown in fig. 3; when the planet wheel 43 drives the carbon tape unwinding gear 46 to rotate, the carbon tape winding gear 45 is an idle gear, and the carbon tape unwinding gear 46 drives the carbon tape 20 to retract, as shown in fig. 4.

The printing rubber roller gear set in the embodiment comprises a gear 47, a gear 48, a gear 49 and a gear 50 which are meshed in sequence, wherein the gear 47 also adopts a duplicate gear, an external gear of the duplicate gear is meshed with an external gear of the sun gear 42, and an internal gear of the duplicate gear is meshed with the gear 48. The gear 48 also meshes with a gear 49, the gear 49 meshing with a gear 50. The gear 47 is driven by the sun gear 42 to rotate the gear 48, and thus the gear 49 and the gear 50.

When the power mechanism acts on the label box 1, the following specific connections are made:

the printing rubber roller gear set in the gear transmission system is connected with the printing rubber roller 31 inside the outer shell 3, and the printing rubber roller 31 drives the label paper 10 by means of friction force between the printing rubber roller 31 and the label paper 10. This carbon ribbon rolling gear 45 is connected with the inside sawtooth of this carbon ribbon receipts area winding up roller 24, and this carbon ribbon unreels gear 46 and supplies the inside sawtooth of area winding up roller 23 with this carbon ribbon to be connected, and when this motor 4 rotated to one side, this first gear 41 transmitted power to this planetary gear set, and this planetary gear set drives this printing rubber roll 31 forward rotation through printing rubber roll gear set, and control carbon ribbon receipts area winding up roller 24 rotates simultaneously, realizes that the forward of label paper 10 goes out paper and carbon ribbon 20's forward tightens up. When the motor 4 rotates to the opposite side, the first gear 41 transmits reverse power to the planetary gear set, the planetary gear set drives the printing rubber roller 31 to rotate in the reverse direction through the printing rubber roller gear set, and simultaneously controls the carbon ribbon supply and winding roller 23 to rotate, so that reverse paper ejection of the label paper 10 and reverse recovery of the carbon ribbon 20 are realized. The reverse gear transmission system capable of driving the label printer to reverse is beneficial to returning the unused label paper 10 and the unused carbon ribbon 20 which exceed the heating line of the printing head to the front end of the heating line of the printing head, so that the unused label paper 10 and the unused carbon ribbon 20 are fully utilized, and the waste of materials is reduced.

In this embodiment, the planetary gear set is further provided with an elastic limiting mechanism, and the elastic limiting mechanism is used for urging the planetary gear 43 to keep a meshed state with the carbon ribbon winding gear 45 in a stop state of the motor 4, so as to ensure the instantaneity of tightening of the carbon ribbon 20 during forward printing.

Specifically, the elastic limiting mechanism includes an elastic limiting member 51 and a limiting rod 52 abutting against the elastic limiting member 51, one end of the elastic limiting member 51 is connected to the tail of the planet carrier 44, the other end of the elastic limiting member 51 is ejected out of the planet carrier 44 and forms a certain tension with the planet carrier 44, the limiting rod 52 is fixed on the outer shell 3 of the printer, and in the shutdown state of the motor 4, the elastic limiting member 51 causes the planet gear 43 and the carbon ribbon winding gear 45 to keep a meshing state under the interference of the limiting rod 52, so that the carbon ribbon winding gear 45 can be timely driven to start, and the instant property of carbon ribbon tightening is ensured.

Referring to fig. 5, torsion springs 53 and 54 having opposite rotation directions are provided inside the belt winding gear 45 and the belt unwinding gear 46. The torsion springs 53 and 54 can ensure that the carbon ribbon 20 can always keep certain tension in the process of normally tightening the carbon ribbon and reversely retracting the carbon ribbon, so that the carbon ribbon 20 cannot be wrinkled, and the smooth operation of the printer is ensured.

Referring to fig. 8, when the label printer according to this embodiment is used for printing a continuous label paper roll, the continuous label paper roll is wound in an outward direction of the continuous label surface paper, so as to prevent the label surface paper from lifting and ensure the adhesion between the label surface paper and the backing paper. The continuous label side of the continuous label roll is guided to sequentially contact the arc-shaped protrusions 14 of the concave arc-shaped guide plate and enter the label paper outlet channel. Continuous label facial tissue can receive rolling of two arc archs 14 in proper order advancing out the paper in-process like this, further guarantees the laminating of label facial tissue and base stock, prevents that label facial tissue wrinkling from arousing folding, the phenomenon of gluing even takes place during label paper printing process, promotes the label and prints the effect.

Referring to fig. 9, if the label printer is used for printing the die-cut label paper roll, the die-cut label paper roll is wound into a roll in a direction in which the die-cut label paper faces inwards, so that the label paper is prevented from being lifted. The die cut label side of the die cut label paper roll is guided into contact with one of the arcuate projections 14 of the inwardly concave arcuate guide plate and into the label exit path. Like this cross cutting label facial tissue still can receive the bellied rolling of arc advancing out the paper in-process, further guarantees the laminating of cross cutting label facial tissue and base stock, prevents that the label sticker from printing in-process cross cutting label facial tissue wrinkling and arouse folding, the phenomenon emergence of gluing even, promotes the label and prints the effect.

Still in order to realize the accurate location to the cross cutting label paper, the inside photoelectric sensing mechanism who is used for detecting the label that still is equipped with of shell body 3. Referring to fig. 10, the photoelectric sensing mechanism in this embodiment includes a photoelectric sensor 6 having an emitting end 61 and a receiving end 62 on the same side of the label paper 10, and a reflecting prism 63 disposed on the other side of the label paper 10. The light beam that this photoelectric sensor 6 transmitting terminal 61 sent perpendicularly passes through behind label paper 10, through reflection prism 63 reflection, is received by receiving terminal 62 behind the perpendicular label paper 10 that passes through again, and the voltage value through detecting changes, realizes the detection to mould cutting label facial tissue on label paper 10 to judge the interval between the cross cutting label facial tissue and the initiating terminal of cross cutting label facial tissue.

Specifically, the reflection prism 63 is provided inside the label cassette 1 and on the label surface paper side of the label paper 10. The photoelectric sensor 6 is provided at a fixed position on the printer outside the side wall of the housing of the label cassette 1, and is located on the base paper side of the label paper 10. The reflecting prism 63 is a total reflection prism, and can reflect the light beam emitted from the emitting end 61 by 180 degrees.

In addition, the position of the emitted light beam of the photoelectric sensor 6 projected on the label paper 10 and the position of the heating line of the printing head 2 are less than or equal to the length of the shortest die-cutting label on the label paper 10, so that the shortest die-cutting label cannot be identified, the running distance of the die-cutting label can be accurately calculated, and the technical effect of accurately starting the printing head is achieved.

Still for the label paper after the accurate cutting printing is accomplished, this shell body 3 is inside still to be equipped with the cutter. The photoelectric sensing mechanism, the printing head 2 and the cutter are sequentially arranged on the label paper outlet channel, the distance between the photoelectric sensing mechanism and the printing head 2 is smaller than or equal to the length of a single die-cut label, and the distance between the printing head 2 and the cutter is the sum of the die-cut label distance and the minimum printing margin distance of the label, and the distance from the label cutting end to the rear end of the die-cut label is subtracted.

Wherein, for improving the cross cutting label printing effect, the minimum margin distance of label printing is 2mm, and the upper and lower regulation seal position of label is minimum for 1 mm. The distance from the cutting end of the label to the rear end of the die-cut label is at least 1 mm.

On the basis of the structure setting of the label printer, the label printer can realize the accurate positioning of the die-cutting label in the continuous operation, and the label accurate positioning printing method comprises the following steps:

firstly, the label printer controls the die-cut label to discharge paper forwards at a constant speed, the control mechanism calculates the time t1 when the front end of the die-cut label reaches the printing head according to the paper discharge speed of the label, then calculates the time t2 when the printing starting position of the die-cut label reaches the printing head, and calculates the time t3 required by the distance from the front end of the die-cut label to the rear end of the die-cut label plus the cutting end of the label to the rear end of the die-cut label. After the above-described time point is determined, the following printing step is started.

Referring to fig. 11, when the photo sensor mechanism detects the front end of the die-cut label in the paper discharging direction, timing is started, as shown in a state a in fig. 11. When the label is advanced forward for a time t1+ t2, which indicates that the print start position of the die-cut label is located just at the heat generating line of the print head 2, the control mechanism controls the print head 2 to start the printing action, as shown in the state B in fig. 11. During the printing process, the photoelectric sensing mechanism detects the front position of the next die-cut label at the same time, as shown in the state C in fig. 11. After the label printing is completed, paper is continuously discharged as shown in a state D in fig. 11. At this time, the control mechanism controls the cutting knife to perform a cutting action, as shown in state E in fig. 11, by timing t3 from the detection of the front end of the die-cut label, so as to complete the cutting of one label.

In the continuous printing process, timing is started by the front end of the next die-cut label detected by the photoelectric sensing mechanism, the printing and cutting actions in the states from A to E are repeatedly executed, and continuous automatic printing and cutting of the die-cut label can be sequentially realized. The accurate positioning printing method can realize accurate printing position positioning of the die-cutting labels and position positioning of the cutter, so that the position of the printed content on each die-cutting label is accurate, the cutter is ensured not to cut on the label surface paper when the die-cutting labels are cut, and the method is simple, stable and reliable.

Based on above-mentioned label printer structure, this label printer's theory of operation does: when the printing is started, if the position of the heating wire of the printing head 2 is at the position to be printed, the power mechanism drives the printing rubber roller 31 which is in close contact with the label paper 10 to rotate, and the label paper 10 is driven to advance by means of the friction between the printing rubber roller 31 and the label paper 10. Meanwhile, the power mechanism drives the carbon tape take-up roller 24 to actively rotate, so that the carbon tape 20 is positively tightened, and the printing action of the printing head 2 is controlled in the process that the label paper 10 and the carbon tape 20 synchronously advance. When printing is started, the heating line of the printing head 2 is not located at the position to be printed, the power mechanism drives the printing rubber roller 31 which is in close contact with the label paper 10 to rotate reversely, the label paper 10 is driven to move back by means of the friction between the printing rubber roller 31 and the label paper 10, and the returned label paper is released in the label return releasing space 22. Meanwhile, the power mechanism drives the carbon tape supply roll 23 to rotate actively, so that the carbon tape 20 is tightened reversely, the label paper 10 and the carbon tape 20 are synchronously retracted, the reverse rotation is stopped until the position to be printed of the label paper 10 is located at the position of the heating wire of the printing head 2, and the normal printing step is started.

The utility model discloses label printer not only is applicable to cross cutting label scroll, realizes printing and the cutting of cross cutting label scroll. The automatic label cutting machine can also be used for printing continuous label paper rolls, thermal shrinkage tube rolls or label strip rolls, meets the requirements of printing and cutting of various label materials, and has wide application range and good economical efficiency.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and it is intended that the present invention cover modifications, equivalents and modifications by those skilled in the art, which are included in the technical spirit of the present invention.

Claims

1. A label printer is characterized by comprising a shell, a label box arranged in the shell, a power mechanism and a control mechanism for controlling paper outlet of the label box and carbon tape winding and unwinding, and a printing head for realizing label printing;

the printing rubber roll gear set in the gear transmission system is connected with a printing rubber roll, the printing rubber roll drives the label paper to move through friction force with the label paper, the carbon ribbon winding gear is connected with the carbon ribbon winding roller, the carbon ribbon unwinding gear is connected with the carbon ribbon supply winding roller, when the motor rotates to one side, the first gear set transmits power to the planetary gear set, and the planetary gear set drives the printing rubber roll and the carbon ribbon winding roller to rotate, so that paper discharging of the label paper and tightening of the carbon ribbon are realized; when the motor rotates to the opposite side, the first gear set transmits reverse power to the planetary gear set, and the planetary gear set drives the printing rubber roller and the carbon ribbon supply tape roller to rotate, so that the paper return of the label paper and the recovery of the carbon ribbon are realized.

2. The label printer of claim 1, wherein said label exit path is disposed linearly along an inside of a sidewall of said inner housing, said groove is disposed at an acute angle to said sidewall, and a print head disposed inside said groove is in oblique contact with a carbon ribbon.

3. The label printer according to claim 2, wherein a supporting baffle for separating the first half area from the second half area is further disposed inside the inner housing, an upper portion of the supporting baffle is provided with at least two concave arc-shaped guiding plates, and a plurality of supporting pillars or supporting rollers are disposed on the label paper outlet channel and the carbon ribbon channel.

4. The label printer of claim 3, wherein said label paper is a continuous roll of label paper or a die cut roll of label paper, said label paper side of said continuous roll of label paper or die cut roll of label paper being in contact with at least one arcuate raised section of said concave arcuate guide plate.

5. The label printer according to claim 4, wherein said continuous roll of label paper is wound into a roll with the continuous label facestock facing outwardly, the continuous label facestock side of said continuous roll of label paper in turn contacting each arcuate raised segment of said concave arcuate guide plate;

6. The label printer according to claim 1, wherein the planetary gear set further comprises an elastic limiting mechanism, the elastic limiting mechanism comprises an elastic limiting member and a limiting rod which abuts against the elastic limiting member, one end of the elastic limiting member is connected with the tail of the planet carrier, the other end of the elastic limiting member is ejected out of the planet carrier and forms a certain tension with the planet carrier, the limiting rod is fixed on the outer shell, and in the motor stop state, the elastic limiting member causes the planet gear to be meshed with the carbon belt winding gear under the interference of the limiting rod.

7. The label printer according to claim 1, wherein torsion springs with opposite rotation directions are disposed inside the carbon tape winding gear and the carbon tape unwinding gear, and saw teeth for controlling rotation of the winding rollers are disposed inside the cores of the carbon tape supply winding roller and the carbon tape winding roller.

8. The label printer of claim 1, further comprising a photo sensor mechanism for detecting the label and a cutter for cutting the printed label backing paper, wherein the photo sensor mechanism, the print head and the cutter are sequentially disposed on the label paper outlet channel, a distance between the photo sensor mechanism and the print head is less than or equal to a length of a single die-cut label, and the distance between the print head and the cutter is a sum of a distance between the die-cut labels and a minimum margin for label printing minus a distance between a cut end of the label and a rear end of the die-cut label.

9. The label printer as claimed in claim 8, wherein said photo-sensing mechanism comprises a photo-sensor having an emitting end and a receiving end both on the same side of the label paper, and a reflecting prism disposed on the other side of the label paper, wherein the light beam emitted from the emitting end of said photo-sensor passes through the label paper perpendicularly, is reflected by said reflecting prism, passes through the label paper perpendicularly, and is received by the receiving end, thereby realizing the detection of the label paper.

10. A label printer according to claim 1, wherein the label printer is for die-cut label paper roll, continuous label paper roll, heat shrink tube roll or label strip roll printing.