CN213734170U

CN213734170U - Thermal printing head

Info

Publication number: CN213734170U
Application number: CN202021343286.0U
Authority: CN
Inventors: 李斌; 王军磊; 滕树敬; 贺喆
Original assignee: Shandong Hualing Electronics Co Ltd
Current assignee: Shandong Hualing Electronics Co Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-07-20
Anticipated expiration: 2030-07-09

Abstract

The utility model relates to a thermal printer head makes technical field, specific serial-parallel switching through multichannel transmission data that says so realizes changing a plurality of heat-generating body resistance operating condition, and then improves the printing time of beating printer head and the thermal printer head of printing efficiency, its characterized in that still is equipped with multichannel data transmission switching circuit, be equipped with decoder and multiplexer switch among the multichannel data transmission switching circuit, the signal input part of decoder links to each other with the printing data output end of outside printer mainboard, be equipped with N way switch that sets up independently each other in the multiplexer switch, every way switch concatenates in proper order respectively between previous drive circuit's signal output part and the next drive circuit's signal input part, and every way switch's control signal input part all links to each other with the signal output part of decoder.

Description

Thermal printing head

The technical field is as follows:

the utility model relates to a thermal print head makes technical field, specific serial-parallel switching through multichannel transmission data that says so realizes changing a plurality of heat-generating body resistance operating condition, and then improves the thermal print head who beats printer head's printing time and print efficiency.

Background art:

the thermal printing head mainly comprises a bottom plate, a ceramic substrate, an integrated drive circuit element, a PCB (printed Circuit Board) or PWB (printed wire board), a socket and other parts, wherein the ceramic substrate and the PCB are respectively fixed on the bottom plate; the drive circuit is provided with a shift register and a latch register, wherein the shift register is positioned at the front end of the latch register and is provided with a signal input end (DATA IN end) and a signal output end (DATA OUT end), when the thermal printing head works, a DATA code sent by a printer mainboard is sent into the shift register through the signal input end, after a line of printing DATA is completely sent into the shift register, the printing DATA is sent into the latch register, and the drive circuit controls the working state of a heating element resistor according to the DATA code IN the latch register to finish DATA printing.

The printing time of the printing head mainly comprises the time for transmitting data to the shift register and the heating time of the resistance of the heating element, so how to improve the working efficiency of the thermal printing head is a problem to be solved urgently. If the thermal printing head has a plurality of data inputs, the input of one line of printing data can be increased by multiple times; particularly for those printheads that require printing of multiple data per line, high resolution, or high speed printing. However, most of the data transmission modes of the thermal printer motherboard and the thermal printer head in the market are only single data transmission or multi-data input, and the use requirements of the printer in different fields cannot be met.

The invention content is as follows:

the utility model discloses to the shortcoming that exists among the prior art and not enough, provided a through the switching of the cluster parallel of multiplexed data, realized changing a plurality of heat-generating body resistance operating condition, and then improved the time of beating printer head and the thermal printer head of printing efficiency.

The utility model discloses can reach through following measure:

the utility model provides a thermal printer head, is equipped with ceramic substrate, is equipped with the heat-generating body resistance more than two on the ceramic substrate, still is equipped with a N drive circuit, and N is more than or equal to 2's positive integer, and drive circuit is connected with heat-generating body resistance one-to-one, and its characterized in that still is equipped with multichannel data transmission switching circuit, be equipped with decoder and multiplexer switch among the multichannel data transmission switching circuit, the signal input part of decoder links to each other with the printing data output end of external printer mainboard, be equipped with the N way switch of independent setting each other in the multiplexer switch, every way switch concatenates in proper order respectively between previous drive circuit's signal output part and the signal input part of next drive circuit, and the control signal input part of every way switch all links to each other with the signal output part of decoder.

Ceramic substrate surface is equipped with the underglaze layer, and the underglaze layer surface is equipped with the electrode and produces the heat-generating body resistance of joule heat, the surface covering insulating protective layer of heat-generating body resistance and electrode.

The decoder can select 74LS138 series or the decoder chip of equivalent function to realize for the break-make state that switches the multiple choice switch according to the printing data code of printer mainboard output.

Drive circuit sets up on ceramic substrate, or sets up on PCB circuit board, multichannel data transmission switching circuit can set up on PCB circuit board.

Driving circuit is for having the thermal print head drive circuit of multiposition shift register and latch, and the connected mode of driving circuit and heat-generating body resistance is prior art, and this is not repeated.

The utility model discloses when using, multichannel data transmission switching circuit's decoder receives the data coding instruction that comes from the printer mainboard and sends, and the data coding instruction of accepting confirms through the decoder rather than the break-make state of connecting multiple selector switch, if want to realize N times data transmission, need send the data code through the mainboard, all break off all switches after the decoder is compiled, and every drive circuit all has an solitary data input promptly, and the parallel input mode promptly, and this kind of mode is fit for the data bulk and prints at a high speed; if the mode is to be switched to the single data transmission mode or the 2-N times data transmission mode, all the multi-way switches or part of the switches are closed.

Compared with the prior art, the utility model, can realize single pass, the multichannel switching of print data, and then can adapt to the different demands of printing, have rational in infrastructure, reliable and stable, print advantages that are showing such as efficient.

Description of the drawings:

fig. 1 is a schematic structural diagram of a thermal printhead according to the present invention.

Fig. 2 is a schematic structural view of a thermal printhead according to embodiment 1 of the present invention.

Fig. 3 is a schematic block diagram of a multi-path data transmission switching circuit in embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of the connection between the multi-way selector switch and the driving circuit in embodiment 1 of the present invention.

Reference numerals: 1 heating panel, 2 ceramic substrate, 3 protection glue layers, 4 drive circuit, 5PCB circuit boards, 6 multichannel data transmission switching circuit, 7 sockets, 8 ground coat, 9 heating element resistances, 10 insulating protective layers, decoder 11.

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings.

As shown in the attached figures 1 and 3, the utility model provides a thermal printing head, which is provided with a ceramic substrate 2, more than two heating element resistors 9 arranged on the ceramic substrate 2, and N driving circuits 4, wherein N is a positive integer greater than or equal to 2, the driving circuits 4 are correspondingly connected with the heating element resistors 9 one by one, and a multi-path data transmission switching circuit 6 is also arranged, the multi-channel data transmission switching circuit 6 is provided with a decoder 11 and a multi-channel selection switch, the signal input end of the decoder 11 is connected with the printing data output end of an external printer mainboard, the multiple-way selection switch is provided with N ways of switches which are independent from each other, each way of switch is respectively connected between the signal output end of the previous drive circuit and the signal input end of the next drive circuit in series in sequence, and the control signal input end of each way of switch is connected with the signal output end of the decoder 11; further, the thermal printing head is also provided with a heat dissipation plate 1, the ceramic substrate 2 is fixed on the heat dissipation plate 1, and meanwhile, the thermal printing head is also provided with a PCB 5 and a socket 7 connected with a printer mainboard.

Example 1:

the example provides a thermal print head, as shown in figure 2, comprising a metal heat sink 1, a PCB 5, a ceramic substrate 2, a driving circuit 4, a protective glue layer 3 and a socket 7 for signal connection with a printer motherboard, the above is the same as the prior art, which is not described in detail, and the multi-channel data transmission switching circuit 6 is provided on the PCB, as shown IN fig. 3, the multiplex switching circuit 6 is constructed by connecting the DATA input (DATA IN) and the DATA output (DATA OUT) of the adjacent drive circuits 4 of the print head to both end pins of the multiplex switch IN the multiplex switching circuit 6, so that DATA IN2 is connected to the same branch of the multiplexer as DATA OUT1, DATA IN3 is connected to the same branch of the multiplexer as DATA OUT2, by analogy, DATA IN and DATA OUT IN the printhead are both connected to terminals of the multiplexer;

as shown IN fig. 4, each driving circuit 4 has a DATA input terminal DATA IN and a DATA output terminal DATA OUT, DATA to be printed is shifted from the DATA input terminal DATA IN to the shift register IN cooperation with a clock CLK, when all of a line of print DATA is shifted to the shift register, the latch terminal (/ LAT) is active at a low level, the DATA IN the shift register is latched to the latch register, and then active at a high level according to a DATA STROBE Signal (STROBE), and it is determined whether a component is heated according to whether the input DATA is 1 or 0, thereby generating the DATA to be printed on the thermal paper;

as shown in fig. 3 and 4, a data selection terminal S receives a data coding instruction sent from a printer motherboard, the received data coding instruction determines the on-off state of a switch connected with the data coding instruction through a decoder, if N times of data transmission is to be realized, the data coding instruction needs to be sent through the motherboard, all switches are turned off after the data coding instruction is compiled by the decoder, that is, each driving circuit has a single data input, that is, a parallel input mode, which is suitable for large data volume or high-speed printing.

As shown IN fig. 3 and 4, if switching to the single DATA transmission or 2-N times DATA transmission mode is to be performed, i.e., all the multi-way switches are closed or some of the multi-way switches are closed, as shown by the dotted area IN fig. 4, that is, DATA IN2 is connected with DATA OUT1, DATA IN3 is connected with DATA OUT2, and so on, DATA IN N is connected with DATA OUT N-1, and the two ends of the connection are equivalently connected together, that is, DATA is input from the first driving circuit DATA IN 1 to the last driving circuit DATA OUT N, so as to complete the single DATA serial input mode.

Claims

1. The utility model provides a thermal printer head, is equipped with ceramic substrate, is equipped with the heat-generating body resistance more than two on the ceramic substrate, still is equipped with a N drive circuit, and N is more than or equal to 2's positive integer, and drive circuit is connected with heat-generating body resistance one-to-one, and its characterized in that still is equipped with multichannel data transmission switching circuit, be equipped with decoder and multiplexer switch among the multichannel data transmission switching circuit, the signal input part of decoder links to each other with the printing data output end of external printer mainboard, be equipped with the N way switch of independent setting each other in the multiplexer switch, every way switch concatenates in proper order respectively between previous drive circuit's signal output part and the signal input part of next drive circuit, and the control signal input part of every way switch all links to each other with the signal output part of decoder.

2. The thermal head according to claim 1, wherein the ceramic substrate has a surface provided with an under glaze layer, the surface of the under glaze layer is provided with an electrode and a heater resistor for generating joule heat, and the surface of the heater resistor and the electrode is covered with an insulating protective layer.

3. A thermal printhead according to claim 1, wherein said encoder is implemented as 74LS138 for switching the on and off states of the multiplexer switch in accordance with the print data code output from the printer main board.

4. The thermal head as claimed in claim 1, wherein the thermal head further comprises a heat dissipating plate, the ceramic substrate is fixed to the heat dissipating plate, and a PCB and a socket connected to a main board of the printer are further provided.

5. The thermal print head of claim 4, wherein the driving circuit is disposed on the ceramic substrate or on a PCB circuit board, and the multiplexing switching circuit is disposed on the PCB circuit board.

6. A thermal printhead according to claim 1, wherein the drive circuit is provided with a multi-bit shift register and a latch.