CN216209524U - Detection jig and system for thermal printing head - Google Patents

Detection jig and system for thermal printing head Download PDF

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Publication number
CN216209524U
CN216209524U CN202122398530.4U CN202122398530U CN216209524U CN 216209524 U CN216209524 U CN 216209524U CN 202122398530 U CN202122398530 U CN 202122398530U CN 216209524 U CN216209524 U CN 216209524U
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China
Prior art keywords
pin
detection
print head
printing head
thermal printing
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CN202122398530.4U
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Chinese (zh)
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莫奋
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Zhuhai Aikerui Precision Technology Co ltd
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Zhuhai Aikerui Precision Technology Co ltd
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Abstract

The utility model provides a detection jig and a system for a thermal printing head, which are characterized in that a detection jig, a test circuit group and a detection controller are arranged to realize the automatic electrical connection of a relay card, a multimeter and an SPI adapter with a pin of the thermal printing head so as to respectively judge whether the thermal printing head is conductive, detect whether the pin is short-circuited or broken and detect whether the thermal printing head normally works, thereby realizing the automatic detection of the quality characteristics of the thermal printing head, and simultaneously reducing the detection error of the thermal printing head, thereby ensuring the quality of the thermal printing head when leaving a factory; the utility model belongs to the technical field of a thermosensitive printing head detection device.

Description

Detection jig and system for thermal printing head
Technical Field
The utility model belongs to the technical field of a thermal printing head detection system, and particularly relates to a thermal printing head detection jig and a thermal printing head detection system.
Background
The thermal printer is a device which prints the required pattern by heating a thermal printing head and contacting the thermal printing paper, the thermal printing head is composed of a row of heating elements and a plurality of pins which are arranged on the thermal printing head and are electrically connected with the heating elements, a control unit of the printer transmits a printing electric signal to the heating elements through the pins, so that the heating elements can generate high temperature quickly through certain current, and a medium coating layer and the heating elements generating high temperature are contacted to generate chemical reaction, thereby realizing the pattern printing on the printing paper. The thermal printing head is used as a core component of the thermal printer, and the thermal printing head needs to be detected before installation so as to ensure that the thermal printing head can work normally after being shipped from a factory. In the prior art, the thermal print head mode is whether to conduct electricity by adopting a universal meter to detect a pin, so that whether the pin is broken or not is judged, detection errors can occur when contact occurs between two adjacent pins, and the quality of the thermal print head when leaving a factory can not be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a thermal printing head detection system, which can automatically detect the quality of a thermal printing head and avoid detection errors caused by short circuit between two adjacent pins, thereby ensuring the quality of the thermal printing head when the thermal printing head leaves a factory.
In order to achieve the purpose of the utility model, the utility model provides a thermal printing head detection jig, which comprises a machine base and a connector, wherein the machine base is provided with a jig controller, an air supply source device and an air cylinder, the air cylinder is connected with an air supply source device pipeline, the air supply source device is electrically connected with the jig controller, the machine base is provided with a printing head clamp, the printing head clamp is provided with a fixing groove, the air cylinder is provided with a pressing plate matched with the fixing groove, and the pressing plate is provided with a plurality of detection needles electrically connected with the connector.
In order to achieve the object of the present invention, the present invention further provides a thermal print head detection system, which comprises the above thermal print head detection jig, a test circuit group and a detection controller;
the test circuit group comprises a multimeter and a relay card which are respectively electrically connected with the connector, so that the multimeter and the relay card can be electrically connected with pins on the thermal printing head through the detection pins;
the detection controller is provided with a data reading device, a data storage device and a data comparison device, the multimeter and the relay card are respectively and electrically connected with the data reading device, and the data reading device and the data storage device are respectively and electrically connected with the data comparison device.
The controller controls the cylinder to drive the pressing plate to descend, so that the detection needle is in contact with the pins of the thermal printing head fixed on the fixing groove, the multimeter and the relay card are electrically connected with the pins of the thermal printing head, and the thermal printing head is detected.
Preferably, the test circuit group further comprises an SPI adapter, and the SPI adapter is electrically connected to the connector and the reading device, respectively; according to technical scheme, the SPI adapter makes thermal print head detecting system detect whether thermal print head normally works through the pin electric connection of detection needle and thermal print head to promote the accuracy that detects better.
Preferably, the jig controller is electrically connected with the detection controller; according to the technical scheme, the detection controller sends an operation instruction to the jig controller, so that the jig controller controls the pressing plate to lift according to the state of the thermal printing head detected by the test circuit group, and the automatic detection of the thermal printing head is realized.
The following are the beneficial effects of the utility model:
the jig controller controls the cylinder to drive the pressing plate to descend so that the detection pin is in contact with the pins on the thermal printing head in the fixing groove, the relay card, the universal meter and the SPI adapter can be electrically connected with the pins through the detection pin to respectively detect whether the thermal printing head is conductive or not, whether the pins are short-circuited or open-circuited or not and whether the thermal printing head normally works or not, and therefore the quality of the thermal printing head is automatically detected.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described below.
FIG. 1 is a schematic structural view of a testing fixture according to the present invention;
fig. 2 is a circuit block diagram of a thermal print head detection system according to the present invention.
Reference numerals:
11. a machine base; 12. a jig controller; 13. a cylinder; 14. a printhead clamp; 15. fixing grooves; 16. pressing a plate; 161. a detection pin; 2. a connector; 3. testing the circuit group; 31. a universal meter; 32. a relay card; 33. an SPI adapter; 4. a detection controller; 41. a data reading device; 42. a data storage device; 43. and a data comparison device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The embodiment provides a detection jig and a system for a thermal printing head.
As shown in fig. 1, a thermal print head detection jig includes a base 11 and a connector 2, the base 11 is provided with a jig controller 12, an air supply source device and an air cylinder 13, the air cylinder 13 is connected with an air supply source device pipeline, the air supply source device is electrically connected with the jig controller 12, the base 11 is provided with a print head clamp 14, the print head clamp 14 is provided with a fixing groove 15, the air cylinder 13 is provided with a pressing plate 16 matched with the fixing groove 15, the pressing plate 16 is located above one side of the fixing groove 15, and the pressing plate 16 is provided with a plurality of detection pins 161 electrically connected with the connector 2.
As shown in fig. 2, the thermal print head detection system includes the thermal print head detection tool, and further includes a test circuit group 3 and a detection controller 4.
Test circuit group 3 includes multimeter 31, relay card 32 and SPI adapter 33, multimeter 31, relay card 32 and SPI adapter 33 and connector 2 electric connection to make multimeter 31, relay card 32 and SPI adapter 33 pass through connector 2 and detection needle 161 electric connection.
The detection controller 4 is provided with a data reading device 41, a data storage device 42 and a data comparison device 43, the universal meter 31, the relay card 32 and the SPI adapter 33 are respectively electrically connected with the data reading device 41, and the data reading device 41 and the data storage device 42 are both electrically connected with the data comparison device 43; the jig controller 12 is electrically connected to the detection controller 4.
The detection steps of the thermal printing head detection system for the thermal printing head are as follows:
the first step,
An operator places the thermal printing head in the fixing groove 15, when the thermal printing head is placed in the fixing groove 15, pins of the thermal printing head are placed below the pressing plate 16, the detection controller 4 sends an operation instruction to the jig controller 12, the jig controller 12 controls the air cylinder 13 to move, and the air cylinder 13 drives the pressing plate 16 to descend, so that the detection needles 161 are in contact with the pins on the thermal printing head; after the detection pin 161 is contacted with the pin, the multimeter 31, the relay card 32 and the SPI adapter 33 can be electrically connected with the pin of the thermal print head through the detection pin 161.
Step two,
The detection controller 4 controls the relay card 32 to start, and the relay card 32 is electrically connected with the pin of the thermal print head through the detection pin 161; the relay card 32 inputs micro-electricity to the thermal print head to determine whether the thermal print head is conductive, and the data reading device 41 reads the conductive information and displays the information to the operator through a display system on the thermal print head detection system.
The relay card 32 gives the thermal print head an input micro-electric value of 3 mA.
Step three,
The detection controller 4 controls the universal meter 31 to start, and the universal meter 31 is electrically connected with a pin of the thermal print head through the detection pin 161; multimeter 31 inputs micro-electricity to each pin and measures the resistance value between the pin and the adjacent pin, the reading device reads the resistance value detected by multimeter 31, the data comparison device 43 compares the resistance value read by the data reading device 41 with the resistance value range stored by the data storage device 42, if the read resistance value is not in the resistance value range stored by the data storage device 43, the pin adjacent to the pin or the component inside the thermal print head which inputs micro-electricity has short circuit or open circuit.
The following gives the multimeter the micro-electrical value of the pin input:
when two adjacent pins are a VH power supply pin and a D01 pin respectively, one of the pins is provided with input of 0.1047457mA micro electricity;
when two adjacent pins are respectively a D01 pin and a DI1 pin, one pin is given with input of 0.1023205mA micro current;
when two adjacent pins are respectively a DI1 pin and a GND pin, one pin is provided with input of 0.1044587mA micro current;
when two adjacent pins are an STB1 pin and a CLK pin respectively, one pin is given with micro-electricity of 0.1021284 mA;
when two adjacent pins are an LTA pin and a CLK pin respectively, 0.1042476mA micro power is input to one pin;
when two adjacent pins are an LTA pin and a VDD pin respectively, 0.1045934mA micro power is input to one pin;
when two adjacent pins are respectively a TM1 pin and a VDD pin, one pin is provided with input of 0.1043128mA micro-electricity;
when two adjacent pins are an STB2 pin and a TM2 pin respectively, one pin is provided with input of 0.1035164mA micro current;
when two adjacent pins are an STB2 pin and a GND pin respectively, one pin is provided with input of 0.1036973mA micro power;
when two adjacent pins are respectively a VH pin and a DI2 pin, one pin is given to input 0.1035453mA micro power;
when two adjacent pins are respectively a TM1 pin and a TM2 pin, one pin is provided with input of 0.103054mA micro current;
when two adjacent pins are an STB1 pin and a GND pin respectively, one pin is provided with input of 0.1041357mA micro power;
when two adjacent pins are respectively a D02 pin and a GND pin, one pin is provided with input of 0.1041652mA micro electricity;
when two adjacent pins are respectively a D02 pin and a DI2 pin, one pin is given with input of 0.1043836mA
The following resistance value ranges are stored by the data storage device:
when two adjacent pins are respectively an HV pin and a D01 pin, the resistance value range is 5500000 ohm-50000 ohm;
when two adjacent pins are respectively a D01 pin and a DI1 pin, the resistance value range is 29000000ohm to 1000000 ohm;
when two adjacent pins are respectively a DI1 pin and a GND pin, the resistance value is larger than 10000000 ohm;
when two adjacent pins are an STB1 pin and a CLK pin respectively, the resistance value is infinite;
when two adjacent pins are an LTA pin and a CLK pin respectively, the resistance value is infinite;
when two adjacent pins are an LTA pin and a VDD pin respectively, the resistance value is infinite;
when two adjacent pins are respectively a TM1 pin and a VDD pin, the resistance value is infinite;
when two adjacent pins are an STB2 pin and a TM2 pin respectively, the resistance value is infinite;
when two adjacent pins are an STB2 pin and a GND pin respectively, the resistance value is infinite;
when two adjacent pins are a VH input pin and a DI2 pin respectively, the resistance value is infinite;
when two adjacent pins are respectively a TM1 pin and a TM2 pin, the resistance value is 45000ohm to 1800 ohm;
when two adjacent pins are an STB1 pin and a GND pin respectively, the resistance value is 2400ohm to 1800 ohm;
when two adjacent pins are respectively a D02 pin and a GND pin, the resistance value is 2900ohm to 1800 ohm;
when two adjacent pins are respectively a D02 pin and a DI2 pin, the resistance value is 4300000ohm to 3000000 ohm.
Step four,
The detection controller 4 controls the relay card 32 and the SPI adapter 33 to start, the relay card 32 is electrically connected with a power supply pin of the thermal print head through the detection pin 161, and the SPI adapter 33 is electrically connected with a DI pin and a D02 pin of the thermal print head through the detection pin 161; the relay card 32 supplies power to the thermal print head, the SPI adapter 33 sends signals to the thermal print head and receives signals returned by the thermal print head, the data comparison device 43 reads the signals sent to the thermal print head by the SPI adapter 33 and the signals returned to the SPI adapter 33 by the thermal print head through the reading device, the data comparison device 43 compares whether the signals sent to the thermal print head by the SPI adapter 33 are consistent with the signals returned to the SPI adapter 33 from the thermal print head, if the signals sent to the thermal print head by the SPI adapter 33 are inconsistent with the signals returned to the SPI adapter 33 from the thermal print head, the thermal print head is in fault, and whether the thermal print head works normally is judged.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (4)

1. The utility model provides a thermal print head detection tool which characterized in that: it includes detection tool includes frame (11) and connector (2), tool controller (12), air supply source device with tool controller (12) electric connection, cylinder (13) with air supply source device pipe connection are installed in frame (11), frame (11) are provided with and print head anchor clamps (14), print head anchor clamps (14) are equipped with fixed slot (15), cylinder (13) install with fixed slot (15) complex clamp plate (16), clamp plate (16) be equipped with a plurality of with connector (2) electric connection's detection needle (161).
2. A thermal print head detection system, characterized by: the thermal print head detection tool comprises the thermal print head detection tool as claimed in claim 1, and further comprises a test circuit group (3) and a detection controller (4), wherein the thermal print head detection tool is provided with a connector (2) and a tool controller (12);
the test circuit group (3) comprises a universal meter (31) and a relay card (32) which are electrically connected with the connector (2) respectively;
the detection controller (4) is provided with a data reading device (41), a data storage device (42) and a data comparison device (43), the universal meter (31) and the relay card (32) are electrically connected with the data reading device (41) respectively, and the data reading device (41) and the data storage device (42) are electrically connected with the data comparison device (43) respectively.
3. A thermal print head detection system as claimed in claim 2 wherein: the test circuit group (3) further comprises an SPI adapter (33), and the SPI adapter (33) is electrically connected with the connector (2) and the data reading device (41) respectively.
4. A thermal print head detection system according to claim 3, wherein: the jig controller (12) is electrically connected with the detection controller (4).
CN202122398530.4U 2021-09-30 2021-09-30 Detection jig and system for thermal printing head Active CN216209524U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122398530.4U CN216209524U (en) 2021-09-30 2021-09-30 Detection jig and system for thermal printing head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122398530.4U CN216209524U (en) 2021-09-30 2021-09-30 Detection jig and system for thermal printing head

Publications (1)

Publication Number Publication Date
CN216209524U true CN216209524U (en) 2022-04-05

Family

ID=80859970

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122398530.4U Active CN216209524U (en) 2021-09-30 2021-09-30 Detection jig and system for thermal printing head

Country Status (1)

Country Link
CN (1) CN216209524U (en)

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