CN113829762A

CN113829762A - Gear transmission system of label printer and reversible label printer

Info

Publication number: CN113829762A
Application number: CN202111264404.8A
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: 2021-12-24

Abstract

The invention discloses a gear transmission system of a label printer and the reversible label printer, belonging to the field of label printers. The gear transmission system comprises a first gear set connected with an output shaft of a motor, a planetary gear set connected with the first gear set, a printing rubber roll gear set connected with the planetary gear set and used for driving label paper to move forward or backward, and a carbon ribbon winding gear and a carbon ribbon unwinding gear which are selectively connected with the planetary gear set; the planetary gear set comprises a sun gear, a planetary gear and a planet carrier, the sun gear drives the planetary gear to rotate under the driving of the first gear set, and the planetary gear is meshed with the carbon belt winding gear or the carbon belt unwinding gear according to the positive and negative rotation of the sun gear. According to the invention, the sun wheel is driven by the motor to rotate forwards and backwards, the planet wheel is selectively meshed with the carbon belt winding gear and the carbon belt unwinding gear, normal printing of label paper can be realized, the label paper can be returned reversely, the carbon belt is recycled, waste of the label paper and the carbon belt is avoided, and the material utilization rate is improved.

Description

Gear transmission system of label printer and reversible label printer

Technical Field

The invention relates to the field of label printers, in particular to a gear transmission system of a label printer and a reversible label printer.

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 length of blank label is left between the heating line of the printing head and the cut portion 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.

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 to establish a new label printer's gear drive system and reversible label printer, make it can realize that label paper goes out paper and the carbon ribbon tightens up when corotation, can realize again that label paper moves back paper and the carbon ribbon moves back when the reversal, after having printed a label, return blank label paper in the label box, the carbon ribbon also can be by smooth taking back in the label box simultaneously, reduces the waste of label paper and carbon ribbon, becomes the object that the industry greatly needed the improvement at present.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a gear transmission system of a label printer, which can realize the paper outlet of label paper and the tightening of a carbon ribbon during forward rotation and can also realize the paper return of the label paper and the return of the carbon ribbon during reverse rotation, and after a label is printed, blank label paper is returned to a label box, and meanwhile, the carbon ribbon can also be flatly returned to the label box, so that the waste of the label paper and the carbon ribbon is reduced, and the defects of the existing label printer are overcome.

In order to solve the technical problem, the invention provides a gear transmission system of a label printer, which comprises a first gear set in transmission connection with an output shaft of a 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 label paper to move forward or backward, and a carbon ribbon winding gear and a carbon ribbon unwinding gear which are in transmission connection with the planetary gear set selectively;

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 the planetary gear is meshed with the carbon ribbon winding gear or the carbon ribbon unwinding gear according to the positive rotation or the reverse rotation of the sun gear under the action of the planet carrier.

In a further improvement, the planetary gear set is further provided with an elastic limiting mechanism, and the elastic limiting mechanism is used for promoting the planetary gear to be meshed with the carbon belt winding gear in the motor stop state.

The improvement is further improved, elasticity stop gear includes elasticity locating part and rather than the inconsistent gag lever post, the one end of elasticity locating part with the planet carrier afterbody is connected, its other end to the planet carrier outside pop out and with the planet carrier forms certain tension, the gag lever post is fixed on printer housing under the motor stall state, the elasticity locating part is in impel under the interference of gag lever post planet wheel and the meshing of carbon ribbon rolling gear.

Further improve, carbon ribbon rolling gear and carbon ribbon unreel gear inside all is equipped with the torsional spring that turns to opposite.

As a further improvement, the present invention also provides a reversible label printer including the gear train of the label printer described above.

The label printer comprises a shell, and a printing rubber roll, a carbon ribbon supply tape winding roll and a carbon ribbon winding roll which are arranged in the shell, wherein the printing rubber roll gear set is connected with the printing rubber roll in the gear transmission system and used for driving label paper to move, the carbon ribbon winding gear is connected with the carbon ribbon winding roll, the carbon ribbon unwinding gear is connected with the carbon ribbon unwinding roll, 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 roll to rotate, so that paper outlet 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 unwinding roller to rotate, so that the paper unwinding of the label paper and the recovery of the carbon tape are 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 invention has at least the following advantages:

1. according to the gear transmission system of the label printer, the sun wheel is driven to rotate forwards and backwards through the motor under the action of the sun wheel, the planet wheel and the planet carrier through the arrangement of the planet gear set, the planet wheel can be selectively meshed with the carbon belt winding gear and the carbon belt unwinding gear, the forward and reverse rotation printing mechanism of the label printer is realized, normal printing paper of label paper can be realized, the label paper can be returned to the label box, the carbon belt is recovered to the label box, waste of the label paper and the carbon belt is avoided, and the material utilization rate is improved.

2. 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.

3. Still through set up the torsional spring that revolves to opposite in carbon ribbon rolling gear and carbon ribbon unreel gear inside, guarantee to tighten up the in-process that the carbon ribbon was tightened up in the forward and the carbon ribbon is withdrawed in the reverse 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.

4. The label printer is suitable for not only die cutting label paper rolls and continuous label paper rolls, but also printing materials such as heat shrinkage tube rolls, label strip rolls and the like, and has wide application range and good economical efficiency.

Drawings

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

Fig. 1 is a schematic structural diagram of the meshing between the planet wheel and the carbon tape winding gear in the gear transmission system of the label printer.

Fig. 2 is a schematic structural view of the meshing between the planetary gear and the carbon ribbon unwinding gear in the gear transmission system of the label printer.

Fig. 3 is a schematic view of the internal structures of a carbon ribbon winding gear and a carbon ribbon unwinding gear in the gear transmission system of the label printer according to the present invention.

Figure 4 is a schematic view of the internal structure of the label printer of the present invention (in which the gear 1 and the gear 7 are in a non-meshing configuration for clarity).

Fig. 5 is a top view of the internal structure of the label printer of the present invention (with gear 1, gear 2, and gear 7 removed for clarity).

Fig. 6 is a schematic view of the internal roller of the label printer of the present invention coupled to a gear train.

Detailed Description

The gear transmission system of the label printer comprises a first gear set in transmission connection with an output shaft of a 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 label paper to move in the forward direction or the reverse direction, and a carbon belt winding gear and a carbon belt unwinding gear which are in transmission connection with the planetary gear set selectively.

Specifically, referring to fig. 1 and 2, the first gear set includes a first gear 1, and the first gear 1 is a duplicate gear, wherein an external gear of the duplicate gear is engaged with an output shaft of the motor and is driven by the output shaft to rotate, and an internal gear of the duplicate gear also rotates along with the output shaft. Of course, the first gear may be 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 2 and planetary gears 3 meshing therewith, and a carrier 4 connecting the sun gear 2 and the planetary gears 3. The planetary gear 3 is rotatably mounted on a carrier 4 and revolves around the sun gear 2. The sun gear 2 also adopts a duplicate gear, an external gear of the duplicate gear is meshed with an internal gear of the first gear 1, an internal gear of the duplicate gear is meshed with the planet gear 3, the sun gear 2 drives the planet gear 3 to rotate under the driving of the first gear 1, and the planet gear 3 also rotates around the sun gear 2. The planet wheel 3 can be selectively meshed with the carbon belt winding gear 5 or the carbon belt unwinding gear 6, when the planet wheel 3 drives the carbon belt winding gear 5 to rotate, the carbon belt unwinding gear 6 is an idle gear, and the carbon belt winding gear 5 drives the carbon belt to tighten; when the planet wheel 3 drives the carbon belt unreeling gear 6 to rotate, the carbon belt reeling gear 5 is an idle gear, and the carbon belt unreeling gear 6 drives the carbon belt to return.

The printing rubber roll gear set in the embodiment comprises a gear 7, a gear 8, a gear 9 and a gear 10 which are sequentially meshed, wherein the gear 7 also adopts a duplicate gear, an outer gear of the duplicate gear is meshed with an outer gear of the sun gear 2, and an inner gear of the duplicate gear is meshed with the gear 8. The gear wheel 8 is simultaneously also in engagement with a gear wheel 9, the gear wheel 9 being in engagement with a gear wheel 10. The gear 7 is driven by the sun gear 2 to rotate the gear 8, and further rotate the gear 9 and the gear 10. On the basis of forward rotation or reverse rotation of the motor, the gear 9 and the gear 10 are beneficial to forward advance or reverse retreat of the label paper, and the forward advance and the retreat of the label paper are facilitated.

The planetary gear set is further provided with an elastic limiting mechanism, and the elastic limiting mechanism is used for promoting the planetary gear and the carbon ribbon winding gear to keep a meshed state in a motor stop state, so that the instantaneity of carbon ribbon tightening in forward printing is guaranteed.

Specifically, the elastic limiting mechanism comprises an elastic limiting part 11 and a limiting rod 12 which is abutted against the elastic limiting part, one end of the elastic limiting part 11 is connected with the tail part of the planet carrier 4, the other end of the elastic limiting part 11 is popped out towards the outer side of the planet carrier 4 and forms certain tension with the planet carrier 4, the limiting rod 12 is fixed on a printer shell, and under the stop state of the motor, the elastic limiting part 11 enables the planet wheel 3 and the carbon ribbon winding gear 5 to be kept in a meshing state under the interference of the limiting rod 12, so that the carbon ribbon winding gear 5 can be timely driven to be started, and the instant property of tightening the carbon ribbon is ensured.

Referring to fig. 3,

torsion springs

13 and 14 having opposite rotation directions are provided inside the carbon ribbon winding gear 5 and the carbon ribbon unwinding gear 6. The

torsion springs

13 and 14 can ensure that the carbon ribbon can be always kept to have certain tension in the process of tightening the carbon ribbon in the forward direction and retracting the carbon ribbon in the reverse direction, so that the problem of wrinkles of the carbon ribbon can be avoided, and the smooth operation of the printer can be ensured.

When the gear transmission system is applied to a label printer, the forward rotation and the backward rotation of the label printer can be realized, and the reversible label printer is formed.

Referring to fig. 4 to 6, the label printer comprises a housing 15 and a gear system arranged inside the housing 15, and a printing roller 16, a carbon ribbon supply roll 17 and a carbon ribbon take-up roll 18 for connection with the gear system. The printing rubber roller gear set in the gear transmission system is connected with the printing rubber roller 16, and the printing rubber roller 16 drives the label paper by means of friction force between the printing rubber roller and the label paper 20. This carbon ribbon rolling gear 5 is connected with this carbon ribbon rolling winding up roller 18, and this carbon ribbon unreels gear 6 and this carbon ribbon and unreels the winding up roller 17 and be connected, and when this motor 19 rotated to one side, this first gear 1 was to this planetary gear set transmission power, and this planetary gear set drove this printing rubber roll 16 forward rotation, and control carbon ribbon rolling up winding up roller 18 rotates simultaneously, realizes that the forward of tag paper 20 goes out paper and the forward of carbon ribbon 21 is tightened up. When the motor 19 rotates to the opposite side, the first gear 1 transmits reverse power to the planetary gear set, the planetary gear set drives the printing rubber roller 16 to rotate in the reverse direction, and meanwhile, the carbon tape unwinding roller 17 is controlled to rotate, so that reverse paper ejection of the label paper 20 and reverse recovery of the carbon tape 21 are realized. The reverse gear transmission system capable of driving the label printer is beneficial to returning the unused label paper 20 and the carbon ribbon 21 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 20 and the unused carbon ribbon 21 are fully utilized, and the waste of materials is reduced.

This label printer can be used for the printing of cross cutting label scroll in this application. Of course, it may also be used for printing on continuous rolls of label paper, shrink-wrap tubing, or label stock, etc.

According to the gear transmission system of the label printer, the gears are arranged in an engagement relation, so that the gear transmission system can realize forward rotation and reverse rotation of the gears by means of the same motor, and meanwhile, the carbon ribbon winding gear or the carbon ribbon unwinding gear can be selectively controlled to rotate as the driving wheel, normal printing of label paper can be realized, the label paper can be returned to the label box, the carbon ribbon is recovered to the label box, waste of the label paper and the carbon ribbon is avoided, and the material utilization rate is improved.

The label printer is suitable for printing media of die-cutting label paper rolls and continuous label paper rolls, is also suitable for printing media made of materials such as heat-shrinkable tube rolls, label strip rolls and the like, 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 in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.

Claims

1. A gear transmission system of a label printer is characterized by comprising a first gear set in transmission connection with an output shaft of a 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 label paper to move forward or backward, and a carbon ribbon winding gear and a carbon ribbon unwinding gear which are selectively in transmission connection with the planetary gear set;

2. A label printer gear system according to claim 1, wherein the planetary gear set is further provided with an elastic limit mechanism for urging the planet wheel into engagement with the carbon ribbon take-up gear in a motor off condition.

3. The gear transmission system of a label printer according to claim 2, wherein the elastic limiting mechanism comprises an elastic limiting member and a limiting rod which is abutted 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 a printer 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.

4. The gear transmission system of a label printer according to any one of claims 1 to 3, wherein torsion springs with opposite rotation directions are arranged inside the carbon tape winding gear and the carbon tape unwinding gear.

5. A reversible label printer comprising a gear drive system of a label printer according to any one of claims 1 to 4.

6. The reversible label printer according to claim 5, wherein the label printer comprises a housing, and a printing rubber roller, a carbon ribbon supply tape winding roller and a carbon ribbon take-up tape winding roller which are arranged inside the housing, wherein the printing rubber roller gear set in the gear transmission system is connected with the printing rubber roller for driving the label paper to move, the carbon ribbon winding gear is connected with the carbon ribbon take-up roller, the carbon ribbon unwinding gear is connected with the carbon ribbon unwinding 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 roller and the carbon ribbon take-up roller to rotate, so that paper discharge 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 unwinding roller to rotate, so that the paper unwinding of the label paper and the recovery of the carbon tape are realized.

7. The reversible label printer according to claim 6, wherein said label printer is used for die-cut label roll, continuous label roll, heat shrink tube roll, or label strip roll printing.