CN114619772B

CN114619772B - Card printer

Info

Publication number: CN114619772B
Application number: CN202210216051.2A
Authority: CN
Inventors: 张璐
Original assignee: Shenzhen Kingpek Co ltd
Current assignee: Shenzhen Kingpek Co ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2023-08-08
Anticipated expiration: 2042-03-07
Also published as: CN116766788A; CN116691180A; CN116872626A; CN116872625A; CN114619772A

Abstract

A card printer has high printing precision, uniform card feeding speed and is suitable for printing thicker cards. The front-stage counter-pressure roller assembly comprises a front-stage counter-pressure roller assembly arranged on the front side of the printing head assembly or comprises a front-stage counter-pressure roller assembly and a rear-stage counter-pressure roller assembly arranged on the rear side of the printing head assembly, wherein the front-stage counter-pressure roller assembly is formed by a front-stage pressure roller and a front-stage driving roller which are installed in the printer in a vertically overlapped mode, the rear-stage counter-pressure roller assembly is formed by a rear-stage pressure roller and a rear-stage driving roller which are installed in the printer in a vertically overlapped mode, and the front-stage pressure roller is arranged on the front-stage pressure roller in a vertically upward manner relative to the front-stage driving roller by a front-stage height adjusting assembly capable of automatically adjusting the height when a card runs to the vicinity of the front-stage pressure roller and before the front end of the card contacts the front-stage pressure roller and/or when the rear end of the card is about to separate from two position nodes where the front-stage pressure roller abuts against the front-stage pressure roller. The printing device is applicable to printing thicker cards, the advancing speed is uniform, the offset dislocation of the advanced position of the printed line content is prevented, and the printing precision can be improved.

Description

Card printer

Technical Field

The present invention relates to thermal transfer printers, and more particularly to a card printer that ensures that a print medium is transported at a uniform speed.

Background

The card conveying channel of the card printer sequentially comprises the following parts from a card to be printed (hereinafter called a blank card) inlet to a card (hereinafter called a loaded card) outlet printed with contents: the card bin, the width limiting adjusting component, the front-stage opposite-pressing roller component, the card position detecting device, the printing head component and the rear-stage opposite-pressing roller component (the direction of a blank card inlet is front, the direction of a loaded card outlet is rear and the same applies below).

The card bin is a bin for placing blank cards, a plurality of blank cards of the same type are placed in the card bin in an up-down stacking mode before printing, and a card driving roller assembly for pushing the blank cards out of the card bin is further arranged in the card bin area.

The width limiting adjusting components are arranged on two sides of the card bin and extend backwards, can be adaptively adjusted according to the width of the card, and correct and adjust the moving card.

The front-stage opposite-pressing roller assembly is arranged in front of the printing head assembly and consists of a front-stage pressing roller and a front-stage driving roller, the front-stage pressing roller presses a blank card moving to the front-stage pressing roller on the front-stage driving roller so as to increase friction between the card and the front-stage driving roller, and therefore slipping of the front-stage driving roller when the blank card is ground is effectively avoided.

The card position detecting device is generally arranged between the front-stage opposite-pressing roller assembly and the printing head assembly, and mainly comprises a position sensor, wherein the position sensor is used for transmitting position information of a blank card moving below the position sensor to a main control circuit of the printer, and the main control circuit calculates the starting time for printing the card according to the set card moving speed and the distance between the sensor and the printing head.

The printing head assembly comprises a printing head arranged on the printing support and a printing driving roller arranged on the conveying channel frame, when printing is performed, the printing head moves downwards and presses the blank card against the printing driving roller, and the printing driving roller rolls the card to move at a set speed.

The rear-stage opposite-pressing roller assembly is basically the same as the front-stage opposite-pressing roller assembly in structure, is arranged behind the printing head assembly, comprises a rear-stage pressing roller and a rear-stage driving roller which are arranged up and down, and presses the loaded card moving to the lower position on the rear-stage driving roller so as to increase the friction force between the card and the rear-stage driving roller, so that the loaded card stably moves backwards at a constant speed.

In general, the distance between the front driving roller and the printing driving roller and the distance between the printing driving roller and the rear driving roller are slightly smaller than the length of a single card, so that the card always has one place to ride on one driving roller of the front driving roller, the printing driving roller and the rear driving roller in the moving process, and the card always receives driving force for moving in the moving process.

In the prior art, the front-stage compression roller and the rear-stage compression roller in the front-stage compression roller assembly and the rear-stage compression roller assembly adopt cylindrical hollow sleeves, the hollow sleeves can rotate freely, tension springs are arranged on the hollow sleeves, when no clamping piece exists between the hollow sleeves and a driving roller below the hollow sleeves, the hollow sleeves are pressed on the driving roller under the action of tension springs, when the front end of a moving clamping piece moves to the hollow sleeves, the clamping piece jacks the hollow sleeves under the pushing of the driving roller arranged in front of the front-stage compression roller assembly and passes through between the hollow sleeves and the driving roller under the hollow sleeves under the rolling of the driving roller.

In the prior art, the distance between the printing head in the printing head assembly and the printing driving roller is adjusted by adopting a tension spring, namely the printing head is connected with a tension spring, the tension spring normally applies a downward force to the printing head, when no card exists between the printing head and the printing driving roller, the printing head is pressed on the printing driving roller, and when the front end of the moving card is about to touch the printing head, the card is extruded between the printing head and the printing driving roller according to the pushing force generated by the front driving roller on the card, namely the printing head is jacked up by the card.

Under the action of tension force of the tension spring, the hollow sleeve is pressed downwards to be normal, and when the card under the hollow sleeve is driven by the driving force, the hollow sleeve is pushed by the card to generate upward passive displacement. This situation has the following disadvantages:

1) When the front end of a card travelling at a set speed touches the hollow sleeve, the card is subjected to a resistance force to generate a short-time pause phenomenon, so that the card cannot stably move at a constant speed in the card conveying channel.

In this case, if the tail area on the card is being printed under the print head, the momentary jump motion will greatly affect the print quality, i.e. cause the printed line content to be shifted and misplaced in advance (in this case, the card is moved from under the print head through the backward stage toward the platen roller assembly).

2) When the tail end edge of the card passing through the space between the hollow sleeve and the driving roller at a set speed passes through the vertical plane of the upper passing axis of the hollow sleeve, the hollow sleeve can rapidly push the card out of the space under the action of tension of the tension spring, so that the card can jump backwards instantly, and the card can not move in the card conveying channel at a constant speed.

In this case, if the head area on the card is being printed under the printhead, the momentary jumping motion will greatly affect the print quality, i.e. offset misalignment that causes a lag in the position of the printed line content (in this case, the card passes under the front pair of platen assemblies and moves toward the printhead assemblies).

3) Also, when the front end of a card traveling at a set speed touches the print head, the card receives a resistance to cause a short pause phenomenon, and thus, an error in printing time is generated.

4) When the card is thicker, the structure cannot adapt to the situation that the position of the front end face of the card, which is abutted against the hollow sleeve or the printing head, is higher, the resistance is larger, the card is pushed to jack up the hollow sleeve or the printing head only by virtue of the driving force for driving the card to travel, and larger force is required.

Disclosure of Invention

The invention aims to solve the technical problem of providing a card printer which has high printing precision and uniform card feeding speed and is suitable for printing thicker cards.

In order to solve the technical problems, the following technical scheme is adopted:

a card printer comprises a front-stage counter-pressure roller assembly arranged on the front side of a printing head assembly and used for rolling a card to advance, wherein the front-stage counter-pressure roller assembly is formed by a front-stage pressure roller and a front-stage driving roller which are installed in the printer in a vertically superposed mode, and the front-stage pressure roller is lifted up by a set distance in the vertical direction relative to the front-stage driving roller when the card runs near the front-stage pressure roller and before the front end of the card touches the front-stage pressure roller and/or the rear end of the card is about to separate from two position nodes where the front-stage pressure roller is propped against the card.

The print head in the print head assembly is raised vertically upward a set distance relative to the print drive roller before the card line reaches the vicinity of the print head and before the front end of the card reaches the print head by an automatically height-adjusting print elevation assembly.

The rear side of the printing head assembly is provided with a rear-stage opposite-pressing roller assembly for rolling the card to advance, the rear-stage opposite-pressing roller assembly is composed of a rear-stage pressing roller and a rear-stage driving roller which are arranged in the printer in a vertically superposed mode, and the rear-stage pressing roller is lifted up by a set distance in the vertical direction relative to the rear-stage driving roller by a rear-stage height-adjusting assembly capable of automatically adjusting the height when the card passes near the rear-stage pressing roller and before the front end of the card contacts the rear-stage pressing roller.

The front-stage height adjusting assembly consists of a front-stage pressing plate, a front-stage connecting rod and a front-stage connecting plate, wherein the front-stage pressing plate is arranged above the front-stage driving roller, the front side or the rear side of the front-stage pressing plate is connected to a frame of the printer through a front-stage hinge shaft, the front-stage pressing roller is rotatably arranged on the front-stage pressing plate and is positioned right above the front-stage driving roller, the other side, opposite to the front-stage hinge shaft, of the front-stage pressing plate is connected with the front-stage connecting plate arranged below the front-stage driving roller in a hinge manner through the front-stage connecting rod, the front-stage connecting plate is connected with the front-stage driving device, and the front-stage pressing plate is forced to rotate by taking the front-stage hinge shaft as a shaft and enables the front-stage pressing roller to move up and down in the vertical direction through the driving of the front-stage driving device.

The printing height-adjusting assembly consists of two support side plates, a support top plate, fixed side plates and a propping plate, wherein the support side plates are used for installing a printing head, the two support side plates are fixedly connected to the inner face of a cover of the printer respectively, the printing head is installed between the two support side plates in an up-and-down moving mode, the support top plate is assembled between the two fixed side plates above the support side plates, the front side of the support top plate is connected with the fixed side plates through a top plate hinge shaft, a top plate compression spring is arranged between the rear side of the support top plate and the cover, the propping plate is arranged below a printing driving roller and is connected with the printing top-driving device, and when the printing head falls down and is contacted with the printing driving roller, the propping plate forces the support side plate to carry the printing head to move up and down in the vertical direction through the driving of the printing top-driving device.

The rear-stage height adjusting assembly consists of a rear-stage pressing plate, a rear-stage connecting rod and a rear-stage connecting plate, the rear-stage pressing plate is arranged above the rear-stage driving roller, the front side or the rear side of the rear-stage pressing plate is connected onto a frame of the printer through a rear-stage hinge shaft, the rear-stage pressing roller is rotatably arranged on the rear-stage pressing plate and is positioned right above the rear-stage driving roller, the other side, opposite to the rear-stage hinge shaft, of the rear-stage pressing plate is connected with the rear-stage connecting plate arranged below the rear-stage driving roller in a hinge manner through the rear-stage connecting rod, the rear-stage connecting plate is connected with the rear-stage driving device, and the rear-stage pressing plate is forced to rotate by taking the rear-stage hinge shaft as a shaft and enables the rear-stage pressing roller to move up and down in the vertical direction through the driving of the rear-stage connecting plate.

The front-stage driving device, the rear-stage driving device and the printing top-driving device use the same driving motor, and the driving motor is a direct-current motor or a stepping motor which respectively transmits kinetic energy to the front-stage driving connecting plate, the rear-stage driving connecting plate and the abutting plate through a gear transmission assembly.

The gear transmission assembly consists of an energy transfer gear assembly, a first driving convex gear and a second driving convex gear, the driving motor transmits kinetic energy to the first driving convex gear and the second driving convex gear through the energy transfer gear assembly, and a middle gear is meshed between the first driving convex gear and the second driving convex gear; the rear drive connecting plate is arranged on the frame through a rear drive shaft, the first drive gear and the second drive gear are respectively arranged on the first drive shaft and the second drive shaft, the first drive shaft and the second drive shaft are parallel to the rear drive shaft and are respectively arranged on the bottom surface of the rear drive connecting plate and positioned on two sides of the rear drive shaft, at least one cam is respectively arranged on the first drive shaft and the second drive shaft, and the peaks of the cam on the first drive shaft and the cam on the second drive shaft are 180 degrees different in the circumferential direction; the front drive connecting plate is arranged on the frame through a front drive shaft and is positioned below the rear drive connecting plate, and the rear side of the top surface of the front drive connecting plate is abutted to the front side of the bottom surface of the rear drive connecting plate in a contact manner; the front-stage connecting rod is connected between the rear side of the front-stage pressing plate and the front side of the front-stage connecting plate, and the rear-stage connecting rod is connected between the rear side of the rear-stage pressing plate and the rear side of the rear-stage connecting plate.

The abutting plate is an abutting block arranged on the front area of the top surface of the rear drive connecting plate or is the top edge of the front part of the rear drive connecting plate.

The rear drive connecting plate is arranged on the frame through a rear drive shaft, the front drive connecting plate is arranged on the frame through a front drive shaft and is positioned below the rear drive connecting plate, and the rear side of the top surface of the front drive connecting plate is abutted to the front side of the bottom surface of the rear drive connecting plate in a contact manner; the front-stage connecting rod is connected between the rear side of the front-stage pressing plate and the front side of the front-drive connecting plate, and the rear-stage connecting rod is connected between the rear side of the rear-stage pressing plate and the rear side of the rear-drive connecting plate; the front-stage, rear-stage and printing drive-ejection device share two cylinders, namely a front-side cylinder and a rear-side cylinder, the front end of a piston rod of the front-side cylinder is abutted to the front side of the rear-side drive connecting plate, the front end of a piston rod of the rear-side cylinder is abutted to the rear side of the rear-side drive connecting plate, and the movement directions of the piston rod of the front-side cylinder and the piston rod of the rear-side cylinder are opposite.

The front-stage height-adjusting assembly is composed of a front-stage left lifting plate, a front-stage right lifting plate and a front-stage driving device, a pressing roller shaft hole corresponding to each other is formed in the front-stage left lifting plate and the front-stage right lifting plate respectively, a front-stage pressing roller is installed between the two pressing roller shaft holes in a bridging mode, a vertical strip-shaped hole is formed in a frame plate of a printer used for installing the left side and the right side of a front-stage driving roller respectively, two ends of a front-stage pressing roller shaft are placed in the vertical strip-shaped holes on the corresponding sides, and the front-stage left lifting plate or the front-stage right lifting plate is connected with a front stage capable of enabling the front-stage left lifting plate and the front-stage right lifting plate to ascend or descend synchronously through a transmission connecting piece.

The printing height-adjusting assembly is composed of a printing grade left lifting plate, a printing grade right lifting plate and a printing grade, wherein the printing grade left lifting plate, the printing grade right lifting plate and the printing grade right lifting plate are provided with a printing head shaft hole corresponding to each other, the printing head is installed between the two printing head shaft holes in a bridging mode through a printing head side shaft arranged on the left side and the right side of the printing head, a vertical strip-shaped hole is formed in a frame plate of a printer used for installing the left side and the right side of a printing driving roller, the end part of the printing head side shaft is arranged in the vertical strip-shaped hole on the corresponding side, and the printing grade lifting plate or the printing grade right lifting plate is connected with a printing grade capable of enabling the printing grade lifting plate and the printing grade right lifting plate to ascend or descend synchronously through a transmission connecting piece.

The rear-stage height-adjusting assembly is composed of a rear-stage left lifting plate, a rear-stage right lifting plate and a rear stage, compression roller shaft holes corresponding to each other are respectively formed in the rear-stage left lifting plate and the rear-stage right lifting plate, the rear-stage compression rollers are installed between the two compression roller shaft holes in a bridging mode, vertical strip-shaped holes are respectively formed in frame plates of printers used for installing the left side and the right side of the rear-stage driving roller, two end portions of a rear-stage compression roller shaft are placed in the vertical strip-shaped holes on corresponding sides, and the rear-stage left lifting plate or the rear-stage right lifting plate is connected with the rear stage capable of enabling the rear-stage left lifting plate and the rear-stage right lifting plate to ascend or descend synchronously through transmission connecting pieces.

The front-stage left lifting plate, the front-stage right lifting plate, the rear-stage left lifting plate, the rear-stage right lifting plate, the printing-stage left lifting plate and the printing-stage right lifting plate are identical in shape and structure, each lifting plate is composed of an upper part and a lower part of an integral structure, the upper part is rectangular or elliptical, a press roller shaft hole or a printing head shaft hole is arranged at the upper part, at least one support leg is arranged at the lower part, the transmission connecting piece is two sliding plates which are mutually parallel and are assembled on a sliding rail in a reciprocating manner along the direction of a card conveying channel, the sliding rail is fixed on the frame plate, the top edge of each sliding plate is of a sawtooth structure, the support leg on each lifting plate is arranged in a corresponding tooth groove in the sawtooth structure and moves along the front-back sliding of the sliding plate between the tooth groove bottom and the tooth top, the direction of the sawtooth corresponding to the front-stage lifting plate is identical to the direction of the sawtooth corresponding to the rear-stage lifting plate, and the direction of the sawtooth corresponding to the printing-stage lifting plate is opposite to the direction of the sawtooth corresponding to the printing-stage lifting plate; when the support legs on the front-stage lifting plate and the rear-stage lifting plate fall into the bottoms of the corresponding tooth grooves, the support legs on the printing-stage lifting plate fall into tooth tops of the corresponding tooth grooves.

The space between the front support leg and the rear support leg of the front lifting plate is the same as the tooth pitch of the saw teeth in the corresponding saw tooth structure; the front stage driving device, the rear stage driving device and the printing stage driving device are motors which are arranged on one side of the sliding plate and can drive the sliding plate to do linear reciprocating movement.

The front-stage height-adjusting assembly comprises a front-stage left transverse plate and a front-stage right connecting rod, the front-stage height-adjusting assembly comprises a vertical plate part and a transverse plate part, the transverse plate part is parallel to the front-stage left transverse plate, a front-stage press roller is installed between the front-stage left transverse plate and the transverse plate part in a bridging mode, shaft holes are respectively formed in one sides of the transverse plate part and the front-stage left transverse plate, which are opposite to the vertical plate part, a rotating shaft is arranged between the two shaft holes, the left end of the rotating shaft penetrates through the corresponding shaft holes to be fixed or rotatably connected to a left base plate which is vertically arranged, and a front-stage driving device capable of driving the front-stage right connecting rod to rotate around the axis of the rotating shaft is arranged below the vertical plate part, and the front-stage press roller is forced to lift or fall along with forward rotation or reverse rotation of the front stage.

The printing height-adjusting assembly comprises a printing grade sliding block, a printing grade sliding rail and a printing grade right connecting rod, wherein the printing grade sliding block is fixedly connected to the left side edge of the printing head, the printing grade sliding rail is fixed on the left substrate, the printing grade right connecting rod is divided into a vertical plate part and a transverse plate part, the transverse plate part is fixedly connected to the right side edge of the printing head, the vertical plate part extends downwards, and a printing grade capable of driving the printing grade right connecting rod to carry the printing head to move up and down is arranged below the vertical plate part.

The rear-stage height-adjusting assembly comprises a rear-stage left transverse plate and a rear-stage right connecting rod, wherein the rear-stage right connecting rod is divided into a vertical plate part and a transverse plate part (the transverse plate part is parallel to the rear-stage left transverse plate), a rear-stage press roller is installed between the rear-stage left transverse plate and the transverse plate part in a bridging mode, shaft holes are respectively formed in one sides, opposite to the vertical plate part, of the transverse plate part and the rear-stage left transverse plate, a rotating shaft is arranged between the two shaft holes, the left end of the rotating shaft penetrates through the corresponding shaft holes to be fixed or rotatably connected to the left base plate, a rear stage capable of driving the rear-stage right connecting rod to rotate around the axis of the rotating shaft is arranged below the vertical plate part, and the rear-stage press roller is forced to lift or fall along with the forward rotation or the reverse rotation of the rear-stage right connecting rod.

The front-stage heightening assembly comprises a front-stage sliding block plate, a front-stage sliding rail and a front-stage right connecting plate, the front-stage sliding rail is fixed on a left substrate which is vertically arranged, the front-stage sliding block plate is parallel to a front-stage right connecting rod, a front-stage compression roller is assembled between the front-stage sliding block plate and the front-stage right connecting rod plate, and a front-stage driving device capable of driving the front-stage right connecting plate to carry the front-stage compression roller to move up and down along the front-stage sliding rail is arranged below the front-stage right connecting plate.

The rear-stage height-adjusting assembly comprises a rear-stage sliding block plate, a rear-stage sliding rail and a rear-stage right connecting plate, the rear-stage sliding rail is fixed on a left substrate which is vertically arranged, the rear-stage sliding block plate is parallel to the rear-stage right connecting plate, the rear-stage pressing roller is assembled between the rear-stage sliding block plate and the rear-stage right connecting plate, and a rear-stage driving device capable of driving the rear-stage right connecting plate to carry the rear-stage pressing roller to move up and down along the rear-stage sliding rail is arranged below the rear-stage right connecting plate.

The front-stage driving device, the rear-stage driving device and the printing-stage driving device are screw rod motors, electromagnetic attraction components and air cylinders.

The rear-stage height-adjusting assembly is a rear-stage right connecting plate, the rear-stage pressing roller is assembled on the rear-stage right connecting plate, and the front-stage pressing roller and the rear-stage pressing roller move up and down along the front-stage sliding rail through the front-stage right connecting plate, the right-side connecting plate and the rear-stage right connecting plate.

The front-stage height-adjusting assembly comprises a front-stage sliding block plate, a front-stage sliding rail, a front-stage right connecting plate and a synchronous belt, wherein the front-stage sliding rail is fixed on a left base plate which is vertically arranged, the front-stage sliding block plate and the front-stage right connecting plate are mutually parallel, a front-stage press roller is assembled between the front-stage sliding block plate and the front-stage right connecting plate, two synchronous wheels are arranged on the right base plate, the synchronous belt is sleeved between the two synchronous wheels, a fastening connecting piece which can be fixedly connected with the front-stage right connecting plate is arranged on the synchronous belt, and the front-stage right connecting plate carries the front-stage press roller to move up and down along the front-stage sliding rail along with forward rotation or reverse rotation of the synchronous belt.

The printing height-adjusting assembly comprises a printing grade sliding block, a printing grade sliding rail, a printing grade right connecting rod and a synchronous belt, wherein the printing grade sliding block is fixedly connected to the left side edge of a printing head, the printing grade sliding rail is fixed to the left substrate, the printing grade right connecting plate is fixedly connected to the right side edge of the printing head, two synchronous wheels are arranged on the right substrate, the synchronous belt is sleeved between the two synchronous wheels, a fastening connecting piece which can be fixedly connected with the printing grade right connecting plate is arranged on the synchronous belt, and the printing grade right connecting rod carries the printing head to move up and down along the printing grade sliding rail along with forward rotation or reverse rotation of the synchronous belt.

The rear-stage height-adjusting assembly comprises a rear-stage sliding block plate, a rear-stage sliding rail, a rear-stage right connecting plate and a synchronous belt, wherein the rear-stage sliding rail is fixed on a vertically arranged left base plate, the rear-stage sliding block plate is parallel to the rear-stage right connecting plate, a rear-stage compression roller is assembled between the rear-stage sliding block plate and the rear-stage right connecting plate, two synchronous wheels are arranged on the right base plate, the synchronous belt is sleeved between the two synchronous wheels, a fastening connecting piece which can be fixedly connected with the rear-stage right connecting plate is arranged on the synchronous belt, and the rear-stage right connecting plate carries along with forward rotation or reverse rotation of the synchronous belt to move up and down along the rear-stage sliding rail.

The rear-stage height adjusting assembly is a rear-stage right connecting plate, the rear-stage pressing roller is assembled on the rear-stage right connecting plate, and the front-stage driving device carries the front-stage pressing roller and the rear-stage pressing roller to move up and down along the front-stage sliding rail through a synchronous wheel, a synchronous belt, the front-stage right connecting plate, a right-side connecting plate and the rear-stage right connecting plate.

The front-stage driving device, the rear-stage driving device and the printing-stage driving device are direct-current motors or stepping motors.

By adopting the structure capable of ensuring uniform and continuous transmission of the printing medium, after the printer acquires the thickness information of the card, the height of the passing card can be adjusted to the opposite-pressing rubber roller and the printing head assembly, so that the structure is applicable to printing of thin cards and thick cards, the advancing speed is uniform, and the printing content cannot be stretched to deform.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following brief description of the drawings used in the description of the embodiments will be obvious, in which the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an outline schematic of a printer of the present invention;

fig. 2 is a schematic diagram showing the internal structure of the printer in embodiment 1;

FIG. 3 is a schematic view of the internal structure of FIG. 2 with the housing removed;

FIG. 4 is a schematic view of the print elevation module of embodiment 1;

FIG. 5 is an exploded view of the print elevation module of FIG. 4;

FIG. 6 is an exploded view of the print elevation module of FIG. 4;

FIG. 7 is a schematic view of the print elevation module of example 1 pressing against the print drive roller;

FIG. 8 is a partial exploded view of FIG. 6;

FIG. 9 is a diagram of the cam scheme in example 1;

FIG. 10 is an exploded view of the cam of FIG. 9;

FIG. 11 is a schematic view of the cylinder replacement cam of embodiment 1 of FIG. 9;

FIG. 12 is a right oblique view of FIG. 11 in embodiment 1;

fig. 13 is a front view of embodiment 2 (saw tooth scheme);

FIG. 14 is a cross-sectional view of FIGS. 13 A-A;

fig. 15 is a perspective view of embodiment 2 (serration scheme) of fig. 13;

Fig. 16 is a perspective view of embodiment 2 of fig. 13 (a slide plate integrated structure in a front-stage elevation adjustment assembly, a print elevation adjustment assembly, and a rear-stage elevation adjustment assembly);

FIG. 17 is an exploded view of FIG. 16;

FIG. 18 is a schematic view showing the elevation of the front stage platen roller and the rear stage platen roller and the printhead depressing (saw tooth scheme) in example 2;

FIG. 19 is a schematic view of the front stage platen roller, the rear stage platen roller, and the simultaneous depression of the print head (saw tooth scheme) in example 2;

FIG. 20 is a schematic view showing the printhead elevation (saw tooth scheme) by pressing down the front stage platen roller and the rear stage platen roller in example 2;

FIG. 21 is a schematic view of example 3 (cylinder scheme);

FIG. 22 is a schematic view of a two cylinder solution of example 4;

FIG. 23 is a partial exploded view of FIG. 22;

FIG. 24 is a schematic view of a screw arrangement of example 4;

FIG. 25 is an exploded view of the lead screw arrangement of FIG. 24;

FIG. 26 is a schematic view of three lead screw schemes in example 4;

fig. 27 is a schematic view of example 5 (synchronous belt scheme);

FIG. 28 is a schematic view of the alternate FIG. 27 timing belt arrangement;

fig. 29 is a partial exploded view of the timing belt of fig. 28.

The reference numerals are as follows:

card printer 1, cover 11, housing 12, card hopper 13, printhead assembly 14, printhead 141, print drive roller 142, take-out path 15, front stage counter roller assembly 16, front stage roller 161, front stage drive roller 162, rear stage counter roller assembly 17, rear stage roller 171, rear stage drive roller 172, sensor device 18.

Front-stage height adjustment assembly 100, front-stage pressing plate 101, front-stage connecting rod 102, front-stage connecting plate 103, front-stage hinge shaft 104, front-stage return spring 105, front-stage left lifting plate 106, front-stage right lifting plate 107, press roller shaft hole 108, front-stage left frame plate 109, front-stage right frame plate 110, front-stage left cross plate 111, front-stage right connecting rod 112, front-stage slider plate 113, front-stage slide rail 114, and front-stage right connecting plate 115.

Print elevation assembly 200, fixed side plate 201, support top plate 202, support side plate 203, abutment plate 204, print grade lifting plate 205, print grade right lifting plate 206, print grade left frame plate 207, print grade right frame plate 208, print head shaft hole 209, print head side shaft 210, print grade slider 211, print grade slide rail 212, print grade right link 213, bump 216, bar guide hole 217, top cover plate 218, top plate compression spring 219, hook 220, hook shaft 221, top plate hinge shaft 222.

The rear stage height adjustment assembly 300, a rear stage pressing plate 301, a rear stage connecting rod 302, a rear drive connecting plate 303, a rear stage hinge shaft 304, a rear stage return spring 305, a rear stage left lifting plate 306, a rear stage right lifting plate 307, a rear stage left frame plate 308, a rear stage right frame plate 309, a rear stage left cross plate 310, a rear stage right connecting rod 311, a rear stage slider plate 312, a rear stage slide rail 313, a rear stage right connecting plate 314, and a right side connecting plate 417.

Vertical bar hole 401, front leg 402, rear leg 403, riser portion 404, cross plate portion 405, timing belt 407, left base plate 408, timing wheel 409, fastening connection 410, side ear plate 411, driving device 412 (refer to front stage driving device, print drive top device, or rear stage driving device), and slide plate 413.

Gear assembly 500, energy transfer gear assembly 501, drive cam first gear 502, drive cam second gear 503, intermediate gear 504, drive cam shaft 505, drive cam second shaft 506, cam 507, drive motor 508, front side cylinder 509, rear side cylinder 510, front drive shaft 511, rear drive shaft 512.

Detailed Description

1. Summary of the invention

As shown in fig. 1 to 29, the card printer 1 of the present invention can ensure that a card to be printed is transported at a uniform speed.

A card hopper 13 for storing blank cards (i.e., cards to be printed), a print head assembly 14, and a removal path 15 for removing cards (hereinafter referred to as content cards) having printed text and patterns from the printer are provided in this order from front to back in the card conveyance path of the printer 1.

In the card conveyance path, a preceding stage counter roller assembly 16 for driving a blank card and a sensor device 18 for detecting the position of the blank card are provided in this order from the card hopper 13 to the print head assembly 14.

As shown in fig. 1, a front stage platen roller assembly 16 is provided on the front side of the printhead assembly 14 (the entrance of the blank card is front, the side of the take-out path is rear, the paper side of fig. 1 is taken as an example, the left side is front, the right side is rear, and the following is the same). The pre-stage counter roller assembly 16 is for rolling the card toward the print head assembly 14, and is composed of a platen roller (hereinafter, pre-stage platen roller 161) and a drive roller (hereinafter, pre-stage drive roller 162) mounted in the printer 1 in a stacked manner. The front stage pressing roller 161 can press the blank card to the front stage driving roller 162 below the blank card under a certain pressure so as to increase the friction between the card and the front stage driving roller 162 and avoid the slipping phenomenon of the front stage driving roller 162 when the card is rolled.

One of the improvements of the present invention is to make the front stage pressing roller 161 pass through the front stage height adjusting assembly 100 automatically adjusting the height, and to raise the front stage pressing roller 161 up in the vertical direction by a set distance (the distance is 0mm to 4mm, preferably 0mm to 3.1 mm) with respect to the front stage driving roller 162 when the card is moved to the vicinity of the front stage pressing roller 161 and before the card is about to touch the front stage pressing roller 161 and/or before the rear end of the card (the "rear end" herein means the rear end of the card is about to move back and forth in the card conveying path) when the card is about to be separated from the two position nodes against which the front stage pressing roller 161 is pressed.

The sensor device 18 is operative to accurately detect status signals of the card position, card width and card thickness and to transmit the signals to the host circuit.

A further improvement of the present invention is to have the print head 141 in the print head assembly 14 be raised vertically upward by a set distance (this distance is 0mm-4mm, preferably 0mm-3.7 mm) relative to the drive roller (hereinafter print drive roller 142) under the print head 141 when the card is in line adjacent to the print head 141 and at two position nodes where the front end of the card is about to touch the print head 141 and/or where the rear end of the card is about to be off of the print head 141 against which it is pressed by the print head assembly 200 which automatically adjusts the height. Printhead assembly 14 includes a printhead 141 and a print drive roller 142 disposed below printhead 141 for rolling movement of the card.

A further improvement of the present invention is that a rear stage counter roller assembly 17 for rolling the card travel is provided at the rear side of the print head assembly 14, the rear stage counter roller assembly 17 is composed of a platen roller (hereinafter referred to as a rear stage platen roller 171) and a drive roller (hereinafter referred to as a rear stage drive roller 172) installed in the printer in a stacked manner, the rear stage platen roller 171 is raised upward in the vertical direction by a set distance (the distance is 0mm to 4mm, preferably 0mm to 2.7 mm) with respect to the rear stage drive roller 172 when the content card travels to the vicinity of the rear stage platen roller 171 and at a position node in front of the card front end which is to touch the rear stage platen roller 171 by a rear stage height adjusting assembly 300 which automatically adjusts the height.

When a card is loaded into the card hopper 13, the sensor provided on the printer 1 detects card thickness information, and the main control circuit can control the rising amplitude of the front stage pressure roller 161 in the front stage height adjusting assembly 100, the print head 141 in the print height adjusting assembly 200, and the rear stage pressure roller 171 in the rear stage height adjusting assembly 300.

The invention sets the front-stage heightening component 100, the printing heightening component 200 and the rear-stage heightening component 300 to have the following maximum beneficial effects:

1. front-end height adjustment assembly 100

When the front end of a card travelling at a set speed is about to touch the front-stage pressing roller 161, the front-stage pressing roller 161 is lifted, so that the phenomenon that the front end of the travelling card is stopped in a short time due to the fact that the front-stage pressing roller 161 is impacted and is subjected to resistance can be avoided, the card is ensured to move in the card conveying channel at a stable and uniform speed, and meanwhile, the situation that the card is blocked due to overlarge thickness can be avoided.

When the rear end of a card traveling at a set speed is about to leave the nip of the front stage nip roller 161, the front stage nip roller 161 is raised to avoid the card being pushed in a momentary jump-like manner toward the printhead assembly 14 by the front stage nip roller 161 and the front stage drive roller 162 moving to roll the card (i.e., the front stage nip roller 161 loses its support when the rear end edge of the card moves past the vertical planar position of the front stage nip roller 161 over the axis, and the front stage nip roller 161 is pressed downward by other components that exert downward pressure on the front stage nip roller 161 to cause the card to be pushed out quickly). In this way, offset misalignment of the card (typically, the distance between the front drive roller 162 and the print drive roller 142 is less than the length of Yu Shanzhang cards) due to the lag in the print quality of the portion of the card being printed below the printhead 141 (i.e., what is displayed in each line of the printed text pattern) is avoided.

2. The print elevation assembly 200.

When the front end of the card travelling at the set speed is about to touch the printing head 141, the printing head 141 is lifted, so that on one hand, the card can be ensured to move in the card conveying channel at a stable and uniform speed, on the other hand, the occurrence of the situation that the card is blocked due to overlarge thickness can be avoided, on the other hand, the short-time pause phenomenon can be prevented from being generated after the card is subjected to resistance, and the error in printing time is avoided.

3. The subsequent level up adjustment assembly 300.

When the front end of a card travelling at a set speed is about to touch the rear stage pressing roller 171, the rear stage pressing roller 171 is raised, and short-time stop of the travelling card due to resistance can be avoided.

2. The embodiment of the invention which can realize the beneficial effects is as follows:

example 1

1. Basic scheme of the present embodiment

1) Front-end height adjustment assembly 100

As shown in fig. 3, 7, 8, 9, and 10, the device is composed of a platen (hereinafter referred to as a front stage platen 101), a link (hereinafter referred to as a front stage link 102), and a connection plate (hereinafter referred to as a front stage connection plate 103).

A front platen 101, which is preferably a rectangular plate, is provided above a front driving roller 162, and a front side or a rear side (a front side in the present invention) of the front platen 101 is connected to a frame (which is an integrally formed shelf provided in the printer housing 12 and constitutes a card conveyance path for a card) of the printer 1 through a front hinge shaft 104 (a front hinge shaft is preferably a bearing connection), and a spring (hereinafter referred to as a front return spring 105) is provided on the front hinge shaft.

The middle area of the front-stage pressing plate 101 is in a hollow structure, and a hollow space is used for accommodating the front-stage pressing roller 161. The pre-press roller 161 comprises a roller sleeve, a sleeve and a roller shaft. The roller sleeve is made of low-viscosity plastic, and has the functions of: when the blank card enters the printer 1, the card can be cleaned before printing, and foreign matters on the card can be effectively stuck. The roller sleeve is sleeved on the sleeve, and the roller sleeve and the sleeve can be fixedly connected or rotatably connected. A roll shaft is arranged in the sleeve in a penetrating mode, annular clamping grooves are formed in two end portions of the roll shaft respectively, the roll sleeve and the sleeve are limited between the two annular clamping grooves through clamping reeds, and the sleeve can carry the roll sleeve to freely rotate on the roll shaft. The front pressing plates 101 on the left side and the right side of the hollowed-out space are respectively provided with a shaft sleeve and a shaft hole, one end of a roller shaft of the front pressing roller 161 is inserted into the shaft sleeve, and the other end of the roller shaft is inserted into the shaft hole through a quick dismounting structure. The pre-stage pressing roller 161 is rotatably mounted on the pre-stage pressing plate 101 directly above the pre-stage driving roller 162.

The cross section of the front-stage connecting rod 102 is preferably rectangular, the two front-stage connecting rods 102 are preferably two, and the upper ends of the two front-stage connecting rods 102 are connected with the opposite side of the front-stage hinge shaft 104 on the front-stage pressing plate 101 through a hinge structure, and the preferred hinge structure of the invention is as follows: a downwardly extending side ear plate 411 is disposed on the other side of the front stage pressing plate 101, and a vertical waist hole (i.e. a bar hole) is disposed on the side ear plate 411, and the waist hole is used for reserving a redundant space between the front stage pressing roller 161 and the front stage driving roller 162 to enable the front stage pressing roller 161 to be jacked up when the front stage pressing roller 161 is pulled downward by the front stage connecting rod 102 and is pressed against the front stage driving roller 162.

The front link 102 may be provided in two ways:

first, it is connected to the frame through a positioning hole provided therein and a fulcrum shaft penetrating into the positioning hole.

Second, a precursor connecting plate 103 is arranged at the lower end of the front-stage connecting rod 102, one end of the precursor connecting plate 103 is hinged with the lower end of the front-stage connecting rod 102, and the precursor connecting plate 103 is connected to the frame.

The second arrangement is preferred in the present invention. The precursor connecting plate 103 is mainly used for transmitting kinetic energy output by a driving device (hereinafter referred to as a pre-stage driving device) to the pre-stage connecting rod 102, so that the pre-stage connecting rod 102 moves up and down, and the pre-stage pressing plate 101 carries the pre-stage pressing roller 161 to lift or drop.

In the first embodiment, the front connecting plate 103 and the front connecting rod 102 are integrated, that is, the portion of the front connecting rod 102 below the pivot shaft is regarded as the front connecting plate 103, the front driving device is connected to the lower end of the front connecting plate 102 through the transmission connector, and the front pressing plate 101 is forced to rotate around the front hinge shaft 104 and move the front pressing roller 161 up and down in the vertical direction by the driving of the front driving device.

In the second mode, the front connecting plate 103 is an independent component, which is horizontally arranged and is connected to the frame through a positioning hole and a supporting shaft arranged on the front connecting plate 103, the front end of the front connecting plate 103 is hinged with the lower end of the front connecting rod 102, and the rear end of the front connecting plate 103 is connected with the front driving device through a transmission connecting piece. By applying a downward or upward force to the rear end of the precursor link plate 103, the front end of the precursor link plate 103 can be rotated about the pivot axis and push the front-stage link 102 upward or pull the front-stage link 102 downward, thereby forcing the front-stage platen 101 to rotate about the front-stage hinge shaft 104 and move the front-stage platen 161 up and down in the vertical direction. The front-stage return spring 105 keeps the side of the front-stage platen 101, on which the front-stage hinge shaft 104 is not provided, in a state of pressing downward all the time, and functions to keep the front-stage platen 101 in a state of pressing down when the front-stage link plate 103 does not apply a driving force thereto through the front-stage link rod 102.

The front-stage driving device can be a stepping motor, a screw motor, an air cylinder or an electromagnetic attraction component.

2) Printing elevation adjustment assembly 200

As shown in fig. 3 to 10, the print elevation adjustment assembly 200 is composed of a connection plate (hereinafter, referred to as a fixed side plate 201) fixedly connected to the printer cover 11, a top plate (hereinafter, referred to as a bracket top plate 202), a side plate (hereinafter, referred to as a bracket side plate 203) to which the print head 141 is mounted, and an abutment plate 204.

a. The fixed side plates 201 are preferably two plates which are symmetrical and parallel to each other and are respectively a left fixed side plate and a right fixed side plate, the left fixed side plate and the right fixed side plate are fixedly connected together through a top cover plate 218, the top cover plate 218 can be a cover plate of a printer or a flat plate additionally arranged, and the left fixed side plate, the right fixed side plate and the top cover plate 218 can also be an integrated structure.

An open hook 220 is provided at the lower rear side of the fixed side plate 201, and the printhead 141 can be rapidly mounted on the fixed side plate 201 by a hook shaft 221 provided at the outer side of the printhead housing, which serves to rapidly and conveniently detach the printhead 141 when the printhead 141 needs to be replaced.

b. The printing head comprises a bracket top plate 202 and a printing head 141, wherein the front side of the bracket top plate (202) is connected with a fixed side plate 201 through a top plate hinge shaft (222), two outer side edges of the rear part of the bracket top plate are provided with protruding blocks 216, correspondingly, the left fixed side plate and the right fixed side plate are provided with strip-shaped guide holes 217, the rear part of the bracket top plate 202 is arranged in the strip-shaped guide holes 217 through the protruding blocks 216 and is assembled below a top cover plate 218, a compression spring (hereinafter called a top plate compression spring 219) is arranged between the top surface of the rear part of the bracket top plate 202 and the top cover plate 218, the protruding blocks 216 are arranged at the lower ends of the strip-shaped guide holes 217 under the action of the top plate compression spring 219, and when the bracket top plate 202 is subjected to upward external force, the protruding blocks 216 can move upwards to the upper ends of the strip-shaped guide holes 217 in the strip-shaped guide holes 217.

c. The two support side plates 203 are respectively a left support side plate and a right support side plate, and the two support side plates 203 are respectively fixedly connected on the left side surface and the right side surface of the printing head shell. The hanging shaft 221 on the print head 141 is a short column shaft, which is disposed at the upper portion of the outer side of the bracket side plate 203, and the print head 141 can be mounted between the left fixed side plate and the right fixed side plate by putting the hanging shaft 221 on the hanging hook 220.

The lower end of the support side plate 203 is provided with an inverted U-shaped notch (the notch is used for avoiding the roller shaft of the printing driving roller 142), when the lower end of the support side plate 203 is acted by upward force, the support side plate 203 can move upwards with the printing head 141, and when the support side plate 203 moves upwards, the support top plate 202 applies upward force to compress the top plate compression spring 219, and the upward moving distance is the travel of the protruding block 216 in the strip-shaped guide hole 217.

d. The abutting plate 204 is mainly used for transmitting kinetic energy output by a driving device (hereinafter referred to as a printing top-driving device) to the support side plate 203 so as to enable the support side plate 203 to move upwards, thereby enabling the support side plate 203 to lift the printing head 141, the abutting plate 204 is an independent component and is horizontally arranged and connected to the frame through a positioning hole and a supporting shaft arranged on the abutting plate 204, the bottom end of the support side plate 203 is in contact with the abutting plate 204, the support side plate 203 can be not in contact with the abutting plate 204, a certain space distance (the space distance is the space height reserved by the abutting plate 204 capable of jacking the support side plate 203 upwards) is arranged between the support side plate 203 and the abutting plate 204, and the abutting plate 204 is connected with the printing top-driving device through a transmission connecting piece.

When it is necessary to jack up the print head 141 and out of contact with the print drive roller 142, the abutment plate 204 forces the carriage side plate 203 to move the print head 141 upward in the vertical direction by the drive of the print drive roller.

The printing top-driving device can be a stepping motor, a screw motor, an air cylinder or an electromagnetic attraction component.

3) Rear-stage heightening assembly 300

As shown in fig. 3, 7, 8, 9, and 10, the rear-stage height adjustment assembly 300 is composed of a pressing plate (hereinafter referred to as a rear-stage pressing plate 301), a connecting rod (hereinafter referred to as a rear-stage connecting rod 302), and a connecting plate (hereinafter referred to as a rear-drive connecting plate 303).

A rear platen 301, which is preferably a rectangular plate, is provided above the rear drive roller 172, and a front side or a rear side (a front side in the present invention) of the rear platen 301 is connected to a frame of the printer (the frame is an integrally formed shelf provided in the printer housing 102 and constitutes a card conveyance path for a card) through a rear hinge shaft 304 (the rear hinge shaft is preferably a bearing connection), and a spring (hereinafter referred to as a rear return spring 305) is provided on the rear hinge shaft 304.

The middle area of the rear-stage pressing plate 301 is in a hollow structure, and a hollow space is used for accommodating the rear-stage pressing roller. The rear stage pressing roller 171 is rotatably mounted on the rear stage pressing plate 301 (both end roller shafts are bridged to the shaft holes of the rear stage pressing plate 301) and is located right above the rear stage driving roller 172.

The rear-stage connecting rods 302 are preferably two, namely a left rear-stage connecting rod and a right rear-stage connecting rod, the section shape of the rear-stage connecting rods 302 is preferably rectangular, the two rear-stage connecting rods 302 are vertically arranged, and the upper ends of the two rear-stage connecting rods are connected with the opposite side of the rear-stage hinge shaft 304 on the rear-stage pressing plate 301 through a hinge structure.

The hinge structure of the invention is preferably: on the other side of the rear platen 301, a downwardly extending side ear plate 411 is provided, and on the side ear plate 411, a vertical waist hole (i.e., a bar hole) is provided, which functions the same as that of the side ear plate 411 provided on the front platen 101.

The rear stage link 302 may be provided in two ways:

Second, a rear driving link plate 303 is provided at the lower end of the rear link 302, one end of the rear driving link plate 303 is hinged to the lower end of the rear link 155, and the rear driving link plate 303 is connected to the frame.

The second arrangement is preferred in the present invention. The rear drive link plate 303 is mainly used for transmitting kinetic energy output by a driving device (hereinafter referred to as a rear drive device) to the rear link rod 302, so that the rear link rod 302 moves up and down, and the rear press plate 301 is lifted or dropped with the rear press roller 171.

In the first embodiment, the rear-drive link plate 303 is integrally formed with the rear-stage link rod 302, so that the portion of the rear-stage link rod 302 below the pivot shaft is regarded as the rear-drive link plate 303, and the rear-stage driving device is connected to the lower end of the rear-stage link rod 302 via a transmission link, and the rear-stage pressing plate 301 is forced to rotate about the rear-stage hinge shaft 304 and move the rear-stage pressing roller 171 vertically by driving the rear-stage driving device.

In the second mode, the rear drive connecting plate 303 is an independent component, which is horizontally arranged and is connected to the frame through a positioning hole and a supporting shaft arranged on the rear drive connecting plate 303, the front end of the rear drive connecting plate 303 is hinged with the lower end of the rear connecting rod 302, and the rear end of the rear drive connecting plate 303 is connected with the rear driving device through a transmission connecting piece. By applying a downward or upward force to the rear end of the rear drive link plate 303, the front end of the rear drive link plate 303 can be rotated about the pivot axis and push the rear link 302 upward or pull the rear link 302 downward, thereby forcing the rear platen 301 to rotate about the rear hinge shaft 304 and move the rear platen 171 upward and downward in the vertical direction. The rear-stage return spring 305 keeps the side of the rear-stage pressing plate 301 on which the rear-stage hinge shaft 304 is not provided in a state of pressing downward all the time, and functions to keep the rear-stage pressing roller 171 in a state of pressing downward when the rear-stage driving link plate 303 does not apply a driving force thereto through the rear-stage link rod 302.

The rear-stage driving device can be a stepping motor, a screw motor, an air cylinder or an electromagnetic attraction component.

2. Further improvements of this embodiment

The front driving device, the rear driving device and the printing top driving device are combined to use the same driving motor 508, and the driving motor 508 is a direct current motor or a stepping motor, which respectively transmits kinetic energy to the front driving connecting plate 103, the rear driving connecting plate 303 and the abutting plate 204 through the gear transmission assembly 500.

The front driving connecting plate 103 is mounted on the frame through a front driving shaft 511, the top surface of the rear side of the front driving connecting plate 103 is located below the bottom surface of the front side of the rear driving connecting plate 303, and the rear side of the top surface of the front driving connecting plate 103 is abutted to the front side of the bottom surface of the rear driving connecting plate 303 in a contact mode.

The front stage connecting rod 102 is connected between the rear side of the front stage pressing plate 101 and the front side of the front drive connecting plate 103, and the rear stage connecting rod 302 is connected between the rear side of the rear stage pressing plate 301 and the rear side of the rear drive connecting plate 303.

The rear drive link 303 is mounted to the frame by a rear drive shaft 512.

The abutment plate 204 is an abutment block provided on a front region of the top surface of the rear drive link plate 303 or a front top edge of the rear drive link plate 303.

The gear assembly 500 is composed of a plurality of gears (hereinafter referred to as a transfer gear assembly 501, a drive cam gear 502, and a drive cam gear 503). The driving motor 508 transmits kinetic energy to the first driving gear 502 and the second driving gear 503 through the energy transmitting gear assembly 501, and a transition gear 504 is meshed between the first driving gear 502 and the second driving gear 503; the driving cam gear 502 and the driving cam gear 503 are respectively mounted on two rotating shafts (hereinafter referred to as a driving cam rotating shaft 505 and a driving cam rotating shaft 506), the driving cam rotating shaft 505 and the driving cam rotating shaft 506 are parallel to the rear driving shaft 512 and are respectively disposed on the bottom surface of the rear driving connecting plate 303 and located on two sides of the rear driving shaft 512, at least one cam 507 is respectively disposed between the bottom surfaces of the driving cam rotating shaft 505 and the driving cam rotating shaft 506, and the cam 507 on the driving cam rotating shaft 505 and the vertex of the cam 507 on the driving cam rotating shaft 506 are 180 degrees apart in the circumferential direction.

The energy transfer gear assembly 501 transfers kinetic energy to the driving first gear 502 and the driving second gear 503, and the driving first gear 502 and the driving second gear 503 drive the cams 507 arranged on the driving first rotating shaft 505 and the driving second rotating shaft 506 to rotate, and when the energy transfer gear assembly rotates, the cams 507 on the driving first rotating shaft 505 and the peaks of the cams 507 on the driving second rotating shaft 506 are different by 180 degrees in the circumferential direction, so that the front end and the rear end of the rear driving connecting plate 303 swing up and down (a seesaw phenomenon is formed).

The working state of the heightening component of the embodiment is as follows:

the top of the cam 507 on the driving convex rotating shaft 505 rotates to the top of the driving convex rotating shaft 506, and the top of the cam 507 rotates to the bottom, so that the front end of the rear driving connecting plate 303 swings downwards, the rear end of the front driving connecting plate 103 swings upwards, the rear top surface of the front driving connecting plate 103 is pressed downwards by the front bottom surface of the rear driving connecting plate 303, the front end of the front driving connecting plate 103 is forced to move upwards, at this time, the front-stage heightening component 100 and the rear-stage heightening component 300 are lifted upwards by a set distance in the vertical direction relative to the front-stage driving roller 162 and the rear-stage driving roller 172, and the printing heightening component 200 is pressed downwards against the printing driving roller 142 in the vertical direction relative to the printing driving roller 142.

The apex of the cam 507 on the driving cam rotating shaft 505 and the apex of the cam 507 on the driving cam rotating shaft 506 rotate to the same position (i.e. critical point), and at this time, the front-stage height adjusting assembly 100, the rear-stage height adjusting assembly 300 and the print height adjusting assembly 200 vertically and downwardly press against the front-stage driving roller 162, the rear-stage driving roller 172 and the print driving roller 142 with respect to the front-stage driving roller 162, the rear-stage driving roller 172 and the print driving roller 142.

The vertex of the cam 507 on the driving cam rotating shaft 505 rotates to the lower side and the vertex of the cam 507 on the driving cam rotating shaft 506 rotates to the upper side, so that the front end of the rear driving connecting plate 303 swings upwards, the rear end swings downwards, the abutting plate 204 on the rear driving connecting plate 303 is forced to move upwards to jack the printing head 141, the front stage pressing roller 161 and the rear stage pressing roller 171 at the moment vertically downwards abut against the front stage driving roller 162 and the rear stage driving roller 172, and the printing head 141 is vertically upwards lifted by a set distance relative to the printing driving roller 142.

The gear assembly 500 is composed of a plurality of gears (hereinafter referred to as a power transmission gear assembly 501 and a cam driving gear 502). The driving motor 508 transmits kinetic energy to the driving convex gear 502 through the energy transmitting gear assembly 501, and a transitional gear 504 is arranged at the rear end of the driving convex gear 502; the driving cam-gear 502 is mounted on a rotating shaft (hereinafter referred to as driving cam-rotating shaft 505 respectively), the driving cam-rotating shaft 505 is parallel to the rear driving shaft 512 and is disposed on the bottom surface of the rear driving connecting plate 303 and located at the front side of the rear driving shaft 512 respectively, at least one cam 507 is disposed in the middle of the bottom surface of the driving cam-rotating shaft 505 respectively, and the peaks of the cams 507 on the driving cam-rotating shaft 505 are 180 degrees different in the circumferential direction.

The energy transfer gear assembly 501 transfers kinetic energy to the driving cam gear 502, and the driving cam gear 502 drives the cam 507 disposed on the driving cam shaft 505 to rotate, and the vertex of the cam 507 on the driving cam shaft 505 is 180 degrees different in the circumferential direction, so that the front and rear ends of the rear driving connecting plate 303 swing up and down (see-saw plate phenomenon is formed) during rotation.

The improvement has the greatest advantages that:

1) The integral orderly control of the front stage pressing roller 161, the rear stage pressing roller 171 and the printing head 141 can be realized, and the lifting height can be precisely controlled by a program.

2) When the cam 507 is used, the structural strength is higher, so that the printer can run more stably.

3. Yet another improvement of the embodiment

As shown in fig. 11 to 12, the front plate 103 is mounted on the frame through a front shaft 511, the top surface of the rear side of the front plate 103 is located below the rear plate 303, and the rear side of the top surface of the front plate 103 abuts against the front side of the bottom surface of the rear plate 303 in a contact manner. The front stage connecting rod 102 is connected between the rear side of the front stage pressing plate 101 and the front side of the front drive connecting plate 103, and the rear stage connecting rod 302 is connected between the rear side of the rear stage pressing plate 301 and the rear side of the rear drive connecting plate 303.

The front stage driving device, the rear stage driving device and the printing drive top device share two cylinders, namely a front cylinder 509 and a rear cylinder 510, the front end of the piston rod of the front cylinder 509 is abutted against the front side of the rear drive connecting plate 303, and the front end of the piston rod of the rear cylinder 510 is abutted against the rear side of the rear drive connecting plate 303. The piston rod of the front side cylinder 509 is moved in the opposite direction to the piston rod of the rear side cylinder 510.

The front stage elevation assembly 100, the rear stage elevation assembly 300, and the print elevation assembly 200 are operated in the foregoing manner by the sequential operation of the front side cylinder 509 and the rear side cylinder 510, even though the front stage platen roller 161, the rear stage platen roller 171, and the print head 141 are lifted or depressed with respect to the front stage drive roller 162, the rear stage drive roller 172, and the print drive roller 142, respectively.

4. Yet another improvement of the present embodiment

The front driving connecting plate 103 is installed on the frame through a front driving shaft 511, the top surface of the rear side of the front driving connecting plate 103 is located below the rear driving connecting plate 303, and the rear side of the top surface of the front driving connecting plate 103 is abutted to the front side of the bottom surface of the rear driving connecting plate 303 in a contact mode. The front stage connecting rod 102 is connected between the rear side of the front stage pressing plate 101 and the front side of the front drive connecting plate 103, and the rear stage connecting rod 302 is connected between the rear side of the rear stage pressing plate 301 and the rear side of the rear drive connecting plate 303.

The front stage driving device, the rear stage driving device and the printing drive top device share a cylinder, and the front end of the piston rod of the cylinder abuts against the front side of the rear drive connecting plate 303.

The front stage elevation module 100, the rear stage elevation module 300, and the print elevation module 200 are operated in the foregoing manner by the air cylinders, even though the front stage platen roller 161, the rear stage platen roller 171, and the print head 141 are lifted or depressed with respect to the front stage drive roller 162, the rear stage drive roller 172, and the print drive roller 142, respectively.

The improvement has the greatest advantages that:

1) The driving parts are few, and the material cost is low;

2) The jacking speed is high when the air cylinder or the electromagnetic attraction component is used.

(II) example 2

1. Basic scheme of the present embodiment

The difference between this embodiment and embodiment 1 is that: the front stage elevation adjustment assembly 100 and the rear stage elevation adjustment assembly 300 are different, and the shape and structure of the abutment plates in the print elevation adjustment assembly 200 are different, and the other structures are substantially the same (refer to the fixed side plate, the bracket top plate, and the like in embodiment 1).

1) Front-end height adjustment assembly 100

As shown in fig. 13 and 15, the front-stage elevation adjustment unit 100 is configured by a left elevation plate (hereinafter referred to as a front-stage left elevation plate 106), a right elevation plate (hereinafter referred to as a front-stage right elevation plate 107), and a front-stage driving device.

The front left lifting plate 106 is composed of an upper part and a lower part which are integrally formed, wherein the upper part is rectangular or elliptic, the upper part is provided with a shaft hole (hereinafter called a compression roller shaft hole 108), the lower part is provided with a supporting foot or is composed of a front supporting foot 402 and a rear supporting foot 403 which are arranged at intervals, and the two supporting feet are preferably identical in length and take the central axis of the upper part as a symmetrical axis.

The front right lifting plate 107 has the same shape and structure as the front left lifting plate and is arranged in parallel with the front left lifting plate 106, the front left lifting plate 106 and the front right lifting plate 107 are respectively assembled on the inner sides of a front left frame plate 109 (207, 308) and a front right frame plate 110 (208, 309) which are arranged in the printer shell 12, correspondingly, a press roller shaft hole 108 is arranged on the upper part of the front right lifting plate 107, the front press roller 161 is bridged between the two press roller shaft holes 108 arranged on the front left lifting plate 106 and the front right lifting plate 107, and the front left lifting plate 106 or the front right lifting plate 107 is connected with a driving device (hereinafter referred to as a front driving device) which can synchronously lift or lift the front left lifting plate 106 and the front right lifting plate 107 through a transmission connecting piece.

The front left frame plate 109 (207, 308) and the front right frame plate 110 (208, 309) are respectively arranged on the left side and the right side of the front side in the printer shell 12, the front driving roller 162 is connected between the front left frame plate 109 (207, 308) and the front right frame plate 110 (208, 309) in a bridging way, a vertical strip-shaped hole 401 is respectively arranged at the upper part of each frame plate, two ends of a roller shaft of the front pressing roller 161 are arranged in the vertical strip-shaped holes 401 on the corresponding side, and sliding rails which are integrally structured with the two frame plates are arranged at the bottoms of the two frame plates.

The transmission connecting piece is two sliding plates 413 which are parallel to each other and are assembled on the sliding rail in a synchronous reciprocating manner along the direction of the card conveying channel (one end of the sliding plate 413 is connected with the driving device), the sliding plates are respectively a front-stage left sliding plate and a front-stage right sliding plate, the top edge of each sliding plate 413 is of a saw tooth structure, the supporting legs or the front supporting legs 402 and the rear supporting legs 403 are respectively arranged in a corresponding tooth slot in the saw tooth structure and move between the bottom of the tooth slot and the tooth top along with the front-back sliding of the sliding plate 413, the front-stage left sliding plate and the front-stage right sliding plate are fixed together through a connecting rod, and when the sliding plate 413 slides on the sliding rail, the two sliding plates 413 synchronously move.

2) Printing elevation adjustment assembly 200

As shown in fig. 13 and 15, the abutting plates in the print elevation module 200 are a left print head elevation plate (hereinafter referred to as a left print stage elevation plate 205) and a right print head elevation plate (hereinafter referred to as a right print stage elevation plate 206) mounted on the bottom of the outer side of the print head housing 12.

The seal-level left lifting plate 205 is composed of an upper part and a lower part which are integrally formed, wherein the upper part is rectangular or elliptic, the lower part is one supporting leg or is composed of a front supporting leg 402 and a rear supporting leg 403 which are arranged at intervals, and the two supporting legs are preferably identical in length and take the central axis of the upper part as a symmetrical axis.

The print-stage right lifting plate 206 has the same shape and structure as the print-stage left lifting plate 205, the print-stage left lifting plate 205 and the print-stage right lifting plate 206 are arranged in parallel, the print-stage left lifting plate 205 and the print-stage right lifting plate 206 are respectively assembled on the inner sides of a print-stage left frame plate 207 (308, 109) and a print-stage right frame plate 208 (309, 110) which are arranged in a shell 12 of the printer, the print-stage left lifting plate 205 and the print-stage right lifting plate 206 are respectively provided with a shaft hole (hereinafter referred to as a print head shaft hole 209) which corresponds to each other, the print head 141 is installed between the two print head shaft holes 209 by bearings (hereinafter referred to as a print head side shaft 210) which are arranged on the left and right sides thereof, and the print-stage left lifting plate 205 or the print-stage right lifting plate 206 is connected with a driving device (hereinafter referred to as a print stage driving device) which can synchronously lift or lower the print-stage left lifting plate 205 by a driving connection.

The frame plates are respectively arranged at the left side and the right side of the middle in the printer shell 12, the printing driving rollers 142 are arranged between the printing-stage left frame plates 207 (308 and 109) and the printing-stage right frame plates 208 (309 and 110), the upper parts of the two frame plates are respectively provided with a vertical strip-shaped hole 401, the end parts of the printing head side shafts 210 are arranged in the vertical strip-shaped holes 401 at the corresponding sides, and the bottoms of the two frame plates are provided with sliding rails which are integrally structured with the two frame plates.

The transmission connecting piece is two sliding plates 413 which are parallel to each other and are assembled on the sliding rail in a synchronous reciprocating manner along the direction of the card conveying channel (one end of each sliding plate 413 is connected with the driving device), and the two sliding plates are respectively a printing-stage left sliding plate and a printing-stage right sliding plate, the top edge of each sliding plate 413 is of a saw tooth structure, and the front support leg 402 and the rear support leg 403 are respectively arranged in a corresponding tooth groove in the saw tooth structure and move between the bottom of the tooth groove and the tooth top along with the front and rear sliding of the sliding plate 413.

The seal stage driving device can be a stepping motor, a screw motor or an air cylinder.

3) Rear-stage heightening assembly 300

As shown in fig. 13 and 15, the rear-stage elevating assembly 300 is constituted by a left elevating plate (hereinafter referred to as a rear-stage left elevating plate 306), a right elevating plate (hereinafter referred to as a rear-stage right elevating plate 307), and a rear-stage driving device.

The rear left lift plate 306 and the rear right lift plate 307 are identical in shape and structure to the front left lift plate, and also have a rectangular or oval upper portion and one leg or front and rear legs 402, 403 disposed at the lower portion. The rear left elevating plate 306 and the rear right elevating plate 307 are arranged in parallel, the rear left elevating plate 306 and the rear right elevating plate 307 are respectively assembled on the inner sides of a rear left frame plate 308 (207, 109) and a rear right frame plate 309 (208, 110) which are arranged in the printer housing 12, a press roller shaft hole 108 which corresponds to each other is respectively arranged on the rear left elevating plate 306 and the rear right elevating plate 307, and the rear press roller 171 is installed in a bridging manner between the two press roller shaft holes 108. The rear left lifting plate 306 or the rear right lifting plate 307 is connected with a driving device (hereinafter referred to as a rear driving device) capable of synchronously lifting or lowering the rear left lifting plate 306 and the rear right lifting plate 307 through a transmission connecting piece.

The rear left frame plate 308 (207, 109) and the rear right frame plate 309 (208, 110) are respectively arranged on the left and right sides of the rear side in the printer housing 12, the bridge connection of the rear driving roller 172 is arranged between the two frame plates, a vertical bar-shaped hole 401 is respectively arranged on the upper part of each frame plate, two ends of a roller shaft of the rear pressing roller 171 are arranged in the vertical bar-shaped holes 401 on the corresponding side, and sliding rails which are integrated with the two frame plates are arranged at the bottoms of the two frame plates.

The transmission connecting piece is two sliding plates 413 which are parallel to each other and are assembled on the sliding rail in a synchronous reciprocating manner along the direction of the card conveying channel (one end of each sliding plate 413 is connected with the driving device), the two sliding plates are respectively a rear-stage left sliding plate and a rear-stage right sliding plate, the top edge of each sliding plate 413 is of a sawtooth structure, and the supporting legs or the front supporting leg 402 and the rear supporting leg 403 are respectively arranged in a corresponding tooth groove in the sawtooth structure and move between the bottom of the tooth groove and the tooth top along with the front-back sliding of the sliding plate 413.

2. Further improvements of this embodiment

As shown in fig. 13, 14 and 16 to 20, the sliding plate 413 in the front stage elevation module 100, the print elevation module 200 and the rear stage elevation module 300 is preferably formed as an integral structure, the length of the sliding plate is preferably longer than the distance between the front stage pressing roller 161 and the rear stage pressing roller 171, both sides of the sliding plate 413 are respectively fixed together by connecting rods, and the front stage driving device, the rear stage driving device and the print stage driving device may be motors which are arranged at one side of the sliding plate 413 and can drive the sliding plate 413 to reciprocate linearly.

The front left lifter plate 106, the front right lifter plate 107, the rear left lifter plate 306, the rear right lifter plate 307, the print-level lifter plate 205, and the print-level right lifter plate 206 in this embodiment have the same shape and structure (the lengths in the vertical direction may be different), and in the saw tooth structure, the direction of saw teeth corresponding to the front lifter plate (including the front left lifter plate 106 and the front right lifter plate 107) is the same as the direction of saw teeth corresponding to the rear lifter plate (including the rear left lifter plate 306 and the rear right lifter plate 307), and the direction of saw teeth corresponding to the front lifter plate is opposite to the direction of saw teeth corresponding to the print-level lifter plate (including the print-level lifter plate 205 and the print-level right lifter plate 206); when the legs or the front legs 402 and the rear legs 403 on the front and rear lifting plates fall into the bottoms of the corresponding tooth grooves, the legs or the front legs 402 and the rear legs 403 on the printing-stage lifting plates fall at the tooth tops of the corresponding tooth grooves, and the spacing between the legs or the front legs 402 and the rear legs 403 of the front lifting plate is the same as the tooth pitch of the corresponding saw teeth in the saw tooth structure.

3. The working state of the heightening component of the embodiment

As shown in fig. 20, when the legs or the front leg 402 and the rear leg 403 of the front stage left lifter plate 106, the front stage right lifter plate 107, the rear stage left lifter plate 306, and the rear stage right lifter plate 307 are positioned at the slot bottom, the legs or the front leg 402 and the rear leg 403 of the print stage right lifter plate 205 and the print stage right lifter plate 206 are positioned at the slot tops, and the front stage platen roller 161 and the rear stage platen roller 171 at this time are respectively pressed against the front stage drive roller 162 and the rear stage drive roller 172, and the print head 141 is raised vertically upward by a set distance with respect to the print drive roller 142.

As shown in fig. 19, when the legs or the front leg 402 and the rear leg 403 of the front stage left lifter plate 106, the front stage right lifter plate 107, the rear stage left lifter plate 306, and the rear stage right lifter plate 307 are at the tooth space intermediate positions (i.e., critical points), the legs or the front leg 402 and the rear leg 403 of the print stage right lifter plate 205 and the print stage right lifter plate 206 are also at the tooth space intermediate positions (i.e., critical points), and the front stage platen roller 161, the rear stage platen roller 171, and the print head 141 at this time are simultaneously brought into contact with the front stage drive roller 162, the rear stage drive roller 172, and the print drive roller 142, respectively.

As shown in fig. 18, when the legs or the front leg 402 and the rear leg 403 of the front stage left lifter plate 106, the front stage right lifter plate 107, the rear stage left lifter plate 306, and the rear stage right lifter plate 307 are at tooth space peaks, the legs or the front leg 402 and the rear leg 403 of the print stage right lifter plate 205 and the print stage right lifter plate 206 are at tooth space bottoms, and the front stage platen roller 161 and the rear stage platen roller 171 at this time are raised in the vertical direction by a set distance relative to the front stage drive roller 162 and the rear stage drive roller 172, and the print head 141 is pressed against the print drive roller 142.

By adopting the technical scheme of the embodiment, the method has the following advantages:

1) The structure is simple, and the cost of the used materials is low.

(III) example 3

1) Front-end height adjustment assembly 100

As shown in fig. 21, the front-stage height adjustment assembly 100 is composed of a left cross plate (hereinafter referred to as a front-stage left cross plate 111) and a right link (hereinafter referred to as a front-stage right link 112).

The front left cross plate 111 is a long plate, is fixed to a left base plate 408 arranged in the transverse direction, and has a shaft hole for mounting the rotating shaft at the front end.

A front-stage right link 112, which is preferably in an inverted "L" shape, and includes a vertical plate portion 404 and a horizontal plate portion 405, the horizontal plate portion 405 being parallel to the front-stage left horizontal plate 111, the front-stage pressing roller 161 being installed in a bridging manner between the front-stage left horizontal plate 111 and the horizontal plate portion 405 and directly above the front-stage driving roller 162, the front-stage driving roller 162 being respectively fixed to a left base plate 408 and a right base plate (not shown) at both ends thereof, the horizontal plate portion 405 being provided with a shaft hole at a position corresponding to a shaft hole on the front-stage left horizontal plate 111, a rotary shaft being provided between the shaft holes, a left end of the rotary shaft being fixed or rotatably connected to the left base plate 408 through the corresponding shaft hole, the front-stage pressing roller 161 being forced to be lifted or dropped along with the forward rotation or reverse rotation of the front-stage right link 112, the front-stage left horizontal plate 111 being rotated in synchronization with the front-stage right link 112, the horizontal plate portion 405 and the front-stage left horizontal plate 111 being relatively fixed, preferably in the following manners:

a. A cross beam 406 for fixing the front left cross beam 111 and the cross beam 405 is provided beside the front stage press roller 161.

b. The two ends of the rotating shaft are D-shaped, D-shaped holes are formed in the positions, corresponding to the front-stage left transverse plate 111, on the transverse plate 405, and the rotating shaft is inserted into the D-shaped holes, so that the rotating shaft, the transverse plate 405 and the front-stage left transverse plate 111 are relatively fixed in the circumferential direction of the rotating shaft.

c. Screw holes are radially formed in the two ends of the rotating shaft, screw holes are formed in the transverse plate portion 405 and the front-stage left transverse plate 111 respectively, and the transverse plate portion 405 and the front-stage left transverse plate 111 are fixedly connected with the two ends of the rotating shaft through screws.

d. The two ends of the rotating shaft are in interference fit with the holes on the transverse plate part 405 and the front left transverse plate 111.

f. The two ends of the rotating shaft are welded or adhered to the transverse plate 405 and the front left transverse plate 111.

g. Circular holes are radially formed in the two ends of the rotating shaft, the transverse plate 405 and the front-stage left transverse plate 111 are correspondingly provided with circular holes, and the transverse plate 405 and the front-stage left transverse plate 111 are respectively connected and fixed with the two ends of the rotating shaft through elastic cylindrical pins.

h. The two ends of the rotating shaft and the transverse plate 405 and the front-stage left transverse plate 111 are respectively provided with a worker key slot and are connected by keys, so that the two ends of the rotating shaft and the transverse plate 405 and the front-stage left transverse plate 111 are circumferentially fixed, and meanwhile worker snap spring slots are formed in the two ends of the worker key slot of the rotating shaft, and axial fixation is achieved through snap springs.

A front driving device capable of driving the front right link 112 to rotate around the axis of the rotating shaft is connected below the vertical plate 404.

The front-stage driving device can be a screw motor, a stepping motor, an air cylinder or an electromagnetic attraction component.

2) Printing elevation adjustment assembly 200

As shown in fig. 21, the abutting plate in the print elevation module 200 may be replaced by a slider (hereinafter, referred to as a print grade slider 211), a slide rail (hereinafter, referred to as a print grade slide rail 212), and a right link (hereinafter, referred to as a print grade right link 213).

The print-level slider 211 is fixedly connected to the left side edge of the print head 141, and correspondingly, the print-level slide rail 212 is fixed on a left base plate 408 arranged vertically, and the print-level slider 211 can move up and down on the slide rail.

The shape of the grade right link 213 is preferably configured in two ways:

first, the shape of the right link 213 is preferably an inverted "L" shape, which includes a vertical plate portion 404 and a horizontal plate portion 405, the horizontal plate portion 405 is fixedly connected to the right side of the printhead 141, the vertical plate portion 404 extends downward, and the print driving link is disposed at the lower end of the vertical plate portion 404.

Second, the right-side lever 213 may be a vertical plate extending vertically downward and having an upper end fixed to the right side of the printhead 141.

The present invention is preferably the first one. A print-level driving device capable of driving the print head 141 of the print-level right link 213 to move up and down along the print-level slide rail 212 is connected below the print-level right link 213.

The seal stage driving device can be a screw motor, a stepping motor, an air cylinder or an electromagnetic attraction component.

3) Rear-stage heightening assembly 300

As shown in fig. 19, the rear-stage height adjustment assembly 300 is composed of a left cross plate (hereinafter referred to as a rear-stage left cross plate 310) and a right link (hereinafter referred to as a rear-stage right link 311) connecting plates.

The rear left cross plate 310 is a long plate, and is fixed on a left base plate 408 arranged transversely, and the front end is provided with a shaft hole for installing a rotating shaft.

The rear-stage right link 311 is preferably in an inverted L shape, and comprises a vertical plate portion 404 and a horizontal plate portion 405, the horizontal plate portion 405 is parallel to the rear-stage left horizontal plate 310, the rear-stage pressing roller 171 is installed between the rear-stage left horizontal plate 310 and the horizontal plate portion 405 in a bridging manner and is located right above the rear-stage driving roller 172, two ends of the rear-stage driving roller 172 are respectively installed on a left base plate 408 and a right base plate (not shown in the figure), a shaft hole is arranged on the horizontal plate portion 405 at a position corresponding to a shaft hole on the rear-stage left horizontal plate 310, a rotating shaft is arranged between the two shaft holes, the left end of the rotating shaft is fixedly or rotatably connected on the transversely arranged left base plate 408 through the corresponding shaft hole, the rear-stage pressing roller 171 is forced to lift or fall along with the forward rotation or the reverse rotation of the rear-stage right link 314, the rear-stage left horizontal plate 310 and the rear-stage right link 311 are synchronously rotated, the horizontal plate portion 405 and the rear-stage left horizontal plate 310 are relatively fixed, and the rear-stage left horizontal plate 310 are preferably fixed in the following manner:

a. A cross beam 406 for fixing the rear left cross beam 310 and the cross beam portion 405 is provided at the side of the rear platen roller 171.

b. The two ends of the rotating shaft are D-shaped, D-shaped holes are formed in the positions, corresponding to the rear-stage left transverse plates, of the transverse plate portion 405, and the rotating shaft is inserted into the D-shaped holes, so that the rotating shaft, the transverse plate portion 405 and the rear-stage left transverse plates 310 are relatively fixed in the circumferential direction of the rotating shaft.

c. Screw holes are radially formed in the two ends of the rotating shaft, screw holes are formed in the transverse plate portion 405 and the rear-stage left transverse plate 310 respectively, and the transverse plate portion 405 and the rear-stage left transverse plate 310 are fixedly connected with the two ends of the rotating shaft through screws.

d. The two ends of the rotating shaft are in interference fit with the holes on the transverse plate 405 and the rear left transverse plate 310.

f. The two ends of the rotating shaft are welded or adhered to the transverse plate 405 and the rear left transverse plate 310.

g. Circular holes are radially formed in the two ends of the rotating shaft, the transverse plate 405 and the rear-stage left transverse plate 310 are correspondingly provided with circular holes, and the transverse plate 405 and the rear-stage left transverse plate 310 are respectively connected and fixed with the two ends of the rotating shaft through elastic cylindrical pins.

h. The two ends of the rotating shaft and the transverse plate 405 and the rear left transverse plate 310 are respectively provided with a worker key slot and are connected by keys, so that the two ends of the rotating shaft and the transverse plate 405 and the rear left transverse plate 310 are circumferentially fixed, and meanwhile, the two ends of the worker key slot of the rotating shaft are provided with worker snap spring slots, and the axial fixation is achieved through the snap springs.

A rear driving device which can drive the rear right connecting rod 311 to rotate around the axis of the rotating shaft is connected below the lower end of the vertical plate part 404.

The rear-stage driving device can be a screw motor, a stepping motor, an air cylinder or an electromagnetic attraction component.

4) The working state of the heightening component of the embodiment

Under control of the main control circuit, the front-stage driving device, the rear-stage driving device, and the print-stage driving device drive the front-stage right link 112, the rear-stage right link 311, and the print-stage right link 213, respectively, to raise the front-stage platen roller 161, the rear-stage platen roller 171, and the print head 141 by a set distance in the vertical direction with respect to the front-stage driving roller 162, the rear-stage driving roller 172, and the print driving roller 142.

By adopting the technical scheme of the implementation, the method has the following advantages:

1) Simple structure and low cost of materials.

(fourth) example 4

1. Basic scheme of the present embodiment

1) Front-end height adjustment assembly 100

As shown in fig. 26, the front-stage elevating assembly 100 is composed of a slider plate (hereinafter, referred to as a front-stage slider plate 113), a slide rail (hereinafter, referred to as a front-stage slide rail 114), and a right link plate (hereinafter, referred to as a front-stage right link plate 115).

The front stage slide rail 114 is fixed on the left base plate 408 arranged transversely, and the front stage slide block plate 113 can move up and down on the front stage slide rail 114 with the front stage press roller 161.

And a front stage slider plate 113 parallel to the front stage right connecting plate 115, the front stage pressing roller 161 being fitted between the front stage slider plate 113 and the front stage right connecting plate 115 and being located directly above the front stage driving roller 162, both ends of the front stage driving roller 162 being fixed to the left and right base plates 408 and (not shown in the figure), respectively.

The front right connecting plate 115 is a long plate, and a front driving device capable of driving the front right connecting plate 115 to move up and down along the front sliding rail 114 is connected below the front right connecting plate.

The front-stage driving device is composed of a screw motor, a stepping motor, an electromagnetic attraction component and an air cylinder.

2) Printing elevation adjustment assembly 200

As shown in fig. 26, the abutment plate in the print elevation module 200 is replaced by a slider (hereinafter, referred to as a print grade slider 211), a slide rail (hereinafter, referred to as a print grade slide rail 212), and a right link (print grade right link 213).

The print-level slider 211 is fixedly connected to the left side edge of the print head 141, and correspondingly, the print-level slide rail 212 is fixed on the left base plate 408 arranged vertically, and the print-level slider 211 moves up and down along with the print head 141 on the print-level slide rail 212.

The print grade right link 213 is preferably shaped in two ways:

first, the right link 213 of the printing stage is in the shape of an inverted "L", which is divided into a vertical plate portion 404 and a horizontal plate portion 405, the horizontal plate portion 405 is fixedly connected to the right side of the printhead 141, the vertical plate portion 404 extends downward, the printhead 141 is mounted between the horizontal plate portion 405 and the stage slider 211 and is located directly above the print driving roller 142, and both ends of the print driving roller 142 are mounted on the left substrate 408 and the right substrate (not shown in the figure), respectively.

Second, the print-level right link 213 is a vertical plate with a vertically downward extending structure, and the upper end of the vertical plate is fixedly connected to the right side of the print head 141, the print head 141 is assembled between the upper end of the print-level right link 213 and the print-level slider 211 and is located right above the print driving roller 142, and two ends of the print driving roller 142 are respectively mounted on the left substrate 408 and the right substrate (not shown in the figure).

In the first preferred embodiment, a print-grade driving device is disposed below the vertical plate portion 404 of the print-grade right link 213, which is integrally formed with the print-grade right link 213 and drives the print head 141 to move up and down along the print-grade slide rail 212.

The seal stage driving device can be a screw motor, a stepping motor, an electromagnetic attraction component or an air cylinder.

3) Rear-stage heightening assembly 300

As shown in fig. 24, the rear-stage height adjustment assembly 300 is composed of a slider plate (hereinafter referred to as a rear-stage slider plate 312), a slide rail (hereinafter referred to as a rear-stage slide rail 313), and a right link plate (hereinafter referred to as a rear-stage right link plate 314).

And a rear front rail 313 fixed to a left base plate 408 disposed laterally, the rear slider plate 312 carrying the rear platen roller 171 to be movable up and down on the rear rail 313.

And a rear stage slider plate 312 parallel to the rear stage right connecting plate 314, the rear stage pressing roller 171 being fitted between the rear stage slider plate 312 and the rear stage right connecting plate 314 and being located directly above the rear stage driving roller 172.

The rear right connecting rod 314 is an elongated member, and a rear driving device capable of driving the rear right connecting plate 314 to move up and down along the rear sliding rail 313 is connected below the rear right connecting rod 314 and carries the rear pressing roller 114.

The rear-stage driving device is a screw motor, a stepping motor, an electromagnetic attraction component or an air cylinder.

4) The working state of the heightening component of the embodiment

Under control of the main control circuit, the front stage driving device, the rear stage driving device and the print stage driving device drive the front stage slider plate 113, the rear stage slider plate 312 and the print stage right link 213 respectively to raise the front stage platen roller 161, the rear stage platen roller 171 and the print head 141 front stage driving roller 162 and the rear stage driving roller 172 in the vertical direction by a set distance with respect to the front stage driving roller 162, the rear stage driving roller 172 and the print driving roller 142.

The invention is further improved as follows: as shown in fig. 22 to 25, the same driving device is used for the front-stage driving device and the rear-stage driving device, and the rear-stage height adjusting assembly 300 is a rear-stage right connecting plate 314.

The rear stage pressing roller 171 is assembled between the left base plate and the rear stage right connecting plate 314, the rear stage right connecting plate 314 is fixedly connected with the front stage right connecting plate 115 through a connecting plate (hereinafter referred to as a right side connecting plate 417), and the front stage driving device moves up and down along the front stage sliding rail 114 through the front stage right connecting plate 115, the right side connecting plate 417 and the rear stage right connecting plate 314.

1) Realizing precise control of the lifting distance of the front stage compression roller 161, the rear stage compression roller 171 and the printing head 141;

2) The printer has low noise during movement.

(fifth) example 5

1. Basic scheme of the present embodiment

1) Front-end height adjustment assembly 100

As shown in fig. 27, the front-stage height adjustment assembly 100 is composed of a slider plate (hereinafter, referred to as a front-stage slider plate 113), a slide rail (hereinafter, referred to as a front-stage slide rail 114), a right link plate (hereinafter, referred to as a front-stage right link plate 115), and a timing belt 407.

And a front stage slider plate 113 parallel to the front stage right connecting plate 115, the front stage pressing roller 161 being fitted between the front stage slider plate 113 and the front stage right connecting plate 115 and being located directly above the front stage driving roller 162.

A vertical bar-shaped hole 401 is arranged on the front side of the right base plate, a roller shaft on the right side of the front-stage driving roller 162 can pass through the bar-shaped hole, the right base plate is provided with a front-stage driving device, two synchronous wheels 409 are respectively arranged at two ends of the front side of the right base plate, and a synchronous belt 407 is sleeved between the two synchronous wheels 409.

The synchronous belt 407 is provided with a fastening connecting piece 410 which can be fixedly connected with the front-stage right connecting plate 115, and the arrangement of the fastening connecting piece 410 can prevent the synchronous belt 407 from running off when rotating, and the front-stage right connecting plate 115 carries the front-stage press roller 161 to move up and down along the front-stage slide rail 114 along with the forward rotation or the reverse rotation of the synchronous belt 407.

The front stage driving device may be a direct current motor or a stepping motor.

2) Printing elevation adjustment assembly 200

As shown in fig. 27, the abutment plate in the print height adjustment assembly 200 is replaced with a slider (hereinafter, referred to as a print level slider 211), a slide rail (hereinafter, referred to as a print level slide rail 212), a right link plate (hereinafter, referred to as a print level right link 213), and a timing belt 407.

The print-level sliding block 211 is fixedly connected to the left side edge of the print head 141, and correspondingly, the print-level sliding rail 212 is fixed on the left base plate 408 arranged vertically, and the print-level sliding block 211 can move up and down along with the print head 141 on the sliding rail.

A print-stage right link 213 fixedly connected to the right side of the print head 141, the print head 141 being fitted between the print-stage slider 211 and the print-stage right link 213 and being positioned above the print-driving roller 142, the print-driving roller 142 being fixed at the left end to the left substrate 408.

The middle of the right base plate is provided with a vertical bar hole 401, a right roll shaft of the printing driving roller 142 penetrates through the vertical bar hole 401, the lower part of the right base plate is provided with a printing grade driving device, two synchronous wheels 409 are respectively arranged at the upper end and the lower end of the right base plate, a synchronous belt 407 is sleeved between the two synchronous wheels 409, a fastening connecting piece 410 which can be fixedly connected with the printing grade right connecting rod 213 is arranged on the synchronous belt 407, the fastening connecting piece 410 is arranged to enable the synchronous belt 407 not to deviate when rotating, and along with the forward rotation or the reverse rotation of the synchronous belt 407, the printing grade right connecting rod 213 carries the printing head 141 to move up and down along the printing grade sliding rail 212.

The print-level driving device can be a direct current motor or a stepping motor.

3) Rear-stage heightening assembly 300

As shown in fig. 25, the rear-stage elevating assembly 300 is composed of a slider plate (hereinafter referred to as a rear-stage slider plate 312), a slide rail (hereinafter referred to as a rear-stage slide rail 313), a right link plate (hereinafter referred to as a rear-stage right link plate 314), and a timing belt 407.

A rear stage slide rail 313 fixed to a left base plate 408 provided laterally, the slider plate being movable up and down on the rear stage slide rail 313.

And a rear stage slider plate 312 parallel to the rear stage right continuous plate 314, the rear stage pressing roller 171 being fitted between the rear stage slider plate 312 and the rear stage right continuous plate 314 and directly above the rear stage driving roller 172, the left end of the rear stage driving roller 172 being fixed to the left base plate 408.

The rear right link plate 314, which is a long plate.

A vertical bar-shaped hole 401 is arranged on the rear side of the right base plate, a right roll shaft of the rear-stage driving roller 172 penetrates through the bar-shaped hole, the right base plate is provided with a rear-stage driving device, two synchronous wheels 409 are respectively arranged at two ends of the right base plate, and a synchronous belt 407 is sleeved between the two synchronous wheels 409.

The synchronous belt 407 is provided with a fastening connection piece 410 which can be fixedly connected with the rear-stage right connecting plate 314, and the arrangement of the fastening connection piece 410 can prevent the synchronous belt 407 from running off when rotating, and the rear-stage right connecting plate 314 carries the rear-stage pressing roller 171 to move up and down along the rear-stage sliding rail 313 along with the forward rotation or the reverse rotation of the synchronous belt 407.

The rear-stage driving device can be a direct current motor or a stepping motor.

4) The working state of the heightening component of the embodiment

Under the control of the main control circuit, the preceding stage driving device, the following stage driving device, and the printing stage driving device respectively drive the timing belt 407 on the corresponding timing wheel, and as the timing belt 407 rotates, the preceding stage platen roller 161, the following stage platen roller 171, and the print head 141 are respectively raised in the vertical direction by set distances with respect to the preceding stage driving roller 162, the following stage driving roller 172, and the printing driving roller 142.

2. Further improvements of this embodiment are: as shown in fig. 28 to 29, the rear-stage elevating assembly 300 and the front-stage elevating assembly 100 use the same driving device, and the rear-stage elevating assembly 300 is a rear-stage right connecting plate 314. The rear stage pressing roller 171 is fitted between the left base plate 408 and the rear stage right connecting plate 314 above the rear stage driving roller 172, and the left end of the rear stage driving roller 172 is fixed to the left base plate 408.

The connecting plate (hereinafter referred to as right connecting plate 417) is a long strip, the rear-stage right connecting plate 314 is fixedly connected with the front-stage right connecting plate 115 through a connecting plate, and the front-stage driving device can move up and down along the front-stage sliding rail 114 by carrying the front-stage pressing roller 161 and the rear-stage pressing roller 171 through the synchronizing wheel 409, the synchronizing belt 407, the front-stage right connecting plate 115, the right connecting plate 417 and the rear-stage right connecting plate 314.

1) When the synchronous belt 407 needs to be replaced, the disassembly and the assembly can be convenient;

2) Because the timing belt 407 has slight elasticity, the printer has a buffering and vibration damping function during the operation of the printer or when the front stage pressing roller 161, the rear stage pressing roller 171 and the printing head 141 are lifted, so that the printer moves more stably.

Claims

1. A card printer comprising a front stage counter roller assembly (16) provided on the front side of a print head (141) for rolling the travel of a card, the front stage counter roller assembly (16) being composed of a front stage roller (161) mounted in the printer in a stacked manner with a front stage drive roller (162), the front stage roller (161) being elevated vertically by a set distance relative to the front stage drive roller (162) when the card travels adjacent to the front stage roller (161) and before the card front end touches the front stage roller (161) and/or when the card rear end is about to come off two position nodes against which the front stage roller (161) is pressing;

A print head (141) in the print head assembly (14) is raised vertically upward by a set distance relative to the print drive roller (142) by a print elevation assembly (200) that automatically adjusts the height, before the card is advanced to the vicinity of the print head (141) and before the front end of the card reaches the print head (141);

a rear-stage opposite-pressing roller assembly (17) for rolling the card to travel is arranged at the rear side of the printing head assembly (14), the rear-stage opposite-pressing roller assembly (17) is composed of a rear-stage pressing roller (171) and a rear-stage driving roller (172) which are arranged in the printer, the rear-stage pressing roller (171) is upwards lifted by a set distance in the vertical direction relative to the rear-stage driving roller (172) by a rear-stage height-adjusting assembly (300) which automatically adjusts the height before the card runs to the vicinity of the rear-stage pressing roller (171) and the front end of the card touches the rear-stage pressing roller (171);

the front-stage height adjusting assembly (100) is characterized by comprising a front-stage pressing plate (101), a front-stage connecting rod (102) and a front-stage connecting plate (103), wherein the front-stage pressing plate (101) is arranged above a front-stage driving roller (162), the front side or the rear side of the front-stage pressing plate (101) is connected to a frame of the printer through a front-stage hinge shaft (104), the front-stage pressing roller (161) is rotatably arranged on the front-stage pressing plate (101) and is positioned right above the front-stage driving roller (162), the other side, opposite to the front-stage hinge shaft (104), of the front-stage pressing plate (101) is connected with the front-stage connecting plate (103) arranged below the front-stage driving roller (162) in a hinged mode through the front-stage connecting rod (102), the front-stage connecting plate (103) is connected with a front-stage driving device, and the front-stage pressing plate (101) is forced to rotate by taking the front-stage hinge shaft (104) as a shaft and enables the front-stage pressing roller (161) to move vertically upwards and downwards.

2. The card printer according to claim 1, wherein the print elevation module (200) is composed of a bracket side plate (203) for mounting the print head (141), a bracket side plate (202), a fixed side plate (201) and an abutting plate (204), the fixed side plate (201) is two, respectively fixedly connected to the inner surface of the cover (11) of the printer, the bracket side plate (203) is mounted between the two fixed side plates (201) in a manner that the print head (141) can move up and down, the bracket side plate (202) is assembled between the two fixed side plates (201) above the bracket side plate (203), the front side of the bracket side plate (202) is connected with the fixed side plate through a top plate hinge shaft (222), a top plate compression spring (219) is arranged between the rear side of the bracket side plate (202) and the cover (11), the abutting plate (204) is arranged below the print driving roller (142) and is connected with the print driving device, and when the print head (141) is dropped down and contacted with the print driving roller (142), the bracket side plate (203) is forced to move vertically above the bracket side plate (203) by the driving device.

3. A card printer according to claim 1, wherein the rear elevation adjustment assembly (300) is composed of a rear platen (301), a rear link (302) and a rear drive link (303), the rear platen (301) is disposed above a rear drive roller (172), the front or rear side of the rear platen (301) is connected to the frame of the printer by a rear hinge shaft (304), the rear platen (171) is rotatably mounted on the rear platen (301) and located directly above the rear drive roller (172), the other side of the rear platen (301) opposite to the rear hinge shaft (304) is hinged to the rear drive link (303) disposed below the rear drive roller (172) by a rear link (302), the rear drive link (303) is hinged to the rear drive device, and the rear platen (301) is forced to rotate about the rear hinge shaft (304) and move the rear platen (171) vertically upward by the driving of the rear drive link (303).

4. A card printer according to claim 3, wherein the front drive, the rear drive and the printing drive use the same drive motor (508), and the drive motor (508) is a dc motor or a stepper motor, which transmits kinetic energy to the front drive link plate (103), the rear drive link plate (303) and the abutment plate (204) via a gear assembly (500), respectively.

5. The card printer of claim 4, wherein the gear assembly (500) is comprised of a power transfer gear assembly (501), a drive cam gear (502), and a drive cam gear (503), the drive motor (508) transferring kinetic energy to the drive cam gear (502) and drive cam gear (503) through the power transfer gear assembly (501), and a transition gear (504) meshed between the drive cam gear (502) and drive cam gear (503); the rear drive connecting plate (303) is arranged on the frame through a rear drive shaft (512), the drive first gear (502) and the drive second gear (503) are respectively arranged on the drive first rotating shaft (505) and the drive second rotating shaft (506), the drive first rotating shaft (505) and the drive second rotating shaft (506) are parallel to the rear drive shaft (512) and are respectively arranged on the bottom surface of the rear drive connecting plate (303) and are positioned on two sides of the rear drive shaft (512), at least one cam (507) is respectively arranged on the drive first rotating shaft (505) and the drive second rotating shaft (506), and the peaks of the cams (507) on the drive first rotating shaft (505) and the drive second rotating shaft (506) are different by 180 degrees in the circumferential direction; the front driving connecting plate (103) is arranged on the frame through a front driving shaft (511) and is positioned below the rear driving connecting plate (303), and the rear side of the top surface of the front driving connecting plate (103) is abutted to the front side of the bottom surface of the rear driving connecting plate (303) in a contact mode; the front-stage connecting rod (102) is connected between the rear side of the front-stage pressing plate (101) and the front side of the front-stage connecting plate (103), and the rear-stage connecting rod (302) is connected between the rear side of the rear-stage pressing plate (301) and the rear side of the rear-stage connecting plate (303).

6. The card printer of claim 5, wherein the abutment plate (204) is an abutment block provided on a front region of the top surface of the rear drive link plate (303) or is a front top edge of the rear drive link plate (303).

7. A card printer according to claim 3, wherein the rear drive link plate (303) is mounted on the frame by a rear drive shaft (512), the front drive link plate (103) is mounted on the frame by a front drive shaft (511) and is positioned below the rear drive link plate (303), and the rear side of the top surface of the front drive link plate (103) is abutted against the front side of the bottom surface of the rear drive link plate (303) in a contact manner; the front-stage connecting rod (102) is connected between the rear side of the front-stage pressing plate (101) and the front side of the front-drive connecting plate (103), and the rear-stage connecting rod (302) is connected between the rear side of the rear-stage pressing plate (301) and the rear side of the rear-drive connecting plate (303); the front-stage, rear-stage and printing top-driving devices share two cylinders, namely a front-side cylinder (509) and a rear-side cylinder (510), the front end of a piston rod of the front-side cylinder (509) is abutted against the front side of the rear-driving connecting plate (303), the front end of a piston rod of the rear-side cylinder (510) is abutted against the rear side of the rear-driving connecting plate (303), and the movement directions of the piston rod of the front-side cylinder (509) and the piston rod of the rear-side cylinder (510) are opposite.