Official seal lock detection circuit

Abstract

The utility model particularly relates to an official seal lock detection circuit which comprises a first connector J2 and a control chip J1, the first connector J2 is connected with the control chip J1, a second connector J2 is connected with a telescopic motor, the official seal lock detection circuit is characterized by further comprising a first phototransistor U1 and a second phototransistor U2, a third pin of the first phototransistor U1 is connected to a sixth pin of the control chip J1, and a fourth pin of the first phototransistor U1 is connected to a fifth pin of the control chip J1. And a pin 3 of the second photoelectric transistor U2 is connected to a pin 7 of the control chip J1. The beneficial effects of the utility model are that the circuit has the characteristics of small size, sensitive reaction and the like through the first photoelectric transistor U1 and the second photoelectric transistor U2, thereby facilitating the fixation of the first photoelectric transistor U1 and the second photoelectric transistor U2.

Description

Technical Field

[0001] The utility model specifically relates to an official seal lock detection circuit. Background Art

[0002] A domestic application number CN202122015576.3 is disclosed, which discloses a return ink seal with the function of detecting the number of stamping times. The structure is as follows: including: a shell; a flip bracket, the shell is movably arranged on the flip bracket, and an elastic member is arranged between the flip bracket and the shell; a seal body, which is movably connected to the flip bracket through a seal body bracket, and the seal body bracket is connected to the shell; a signal collection circuit board, which is connected to the seal body bracket, and a contact switch is arranged on the signal collection circuit board, and the contact switch corresponds to the seal body bracket; the number of stamping times is counted by counting the pressing information of the seal, which is not easy to misjudge or miss, and the accuracy of the number of stamping times is guaranteed; by setting an elastic ejector pin, the horizontal section of the elastic ejector pin is tightly pressed against the nickel strip, and the stable transmission of the pressing signal counted when the seal is working is guaranteed. Among them, in actual use, the seal body bracket moves upward and compresses the spring until the seal body bracket contacts the contact switch, triggering the switch to generate a pressing signal; by setting a signal collection circuit board, the number of occurrences of the pressing signal is collected. The following problems exist when installing the contact switch: the contact switch is a spring type, which is difficult to install and too large in size, and pressing for a long time will cause problems such as poor contact. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a seal lock detection circuit with high safety performance and effective prevention of excessive transient current from burning electronic components.

[0004] According to the official seal lock detection circuit of the utility model, it includes a first connector J2 and a control chip J1, the first connector J2 and the control chip J1 are connected, the second connector J2 is connected to a telescopic motor, and also includes a first phototransistor U1 and a second phototransistor U2, the 3rd pin of the first phototransistor U1 is connected to the 6th pin of the control chip J1, and the 3rd pin of the second phototransistor U2 is connected to the 7th pin of the control chip J1.

[0005] Specifically, a third resistor R3 is disposed between pin 2 and pin 1 of the first phototransistor U1 , and the third resistor R3 is connected to the IR_VCC terminal.

[0006] Specifically, the third resistor R3 is connected to the IR_VCC terminal via the first resistor R1.

[0007] Specifically, a first diode D1 is disposed between pins 3 and 4 of the first phototransistor U1 , and the first diode D1 is connected to a ground terminal GND.

[0008] Specifically, a fourth resistor R4 is disposed between pin 2 and pin 1 of the second phototransistor U2 , and the fourth resistor R4 is connected to the IR_VCC terminal.

[0009] Specifically, the third resistor R3 is connected to the IR_VCC terminal via the second resistor R2.

[0010] Specifically, a second diode D2 is disposed between pins 3 and 4 of the first phototransistor U1 , and the second diode D2 is connected to a ground terminal GND.

[0011] The beneficial effects of the utility model are as follows: the circuit has the characteristics of small size and sensitive response through the first phototransistor U1 and the second phototransistor U2, and is convenient for fixing the first phototransistor U1 and the second phototransistor U2. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings.

[0013] Figure 1 It is a circuit diagram of the utility model.

[0014] Figure 2 This is the circuit diagram of the first phototransistor U1 of the utility model.

[0015] Figure 3 This is the circuit diagram of the second phototransistor U2 of the utility model. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] Reference below Figures 1 to 3 Description The seal lock detection circuit according to the embodiment of the utility model includes a first connector J2 and a control chip J1, the first connector J2 and the control chip J1 are connected, the second connector J2 is connected to a telescopic motor, and also includes a first phototransistor U1 and a second phototransistor U2, the 3rd pin of the first phototransistor U1 is connected to the 6th pin of the control chip J1, and the 3rd pin of the second phototransistor U2 is connected to the 7th pin of the control chip J1. This circuit has the characteristics of small size and sensitive response through the first phototransistor U1 and the second phototransistor U2, which is convenient for fixing the first phototransistor U1 and the second phototransistor U2.

[0018] The circuit has the characteristics of small size and sensitive response through the first phototransistor U1 and the second phototransistor U2, which is convenient for fixing the first phototransistor U1 and the second phototransistor U2, and can be fixed by pasting or embedding. The first phototransistor U1 and the second phototransistor U2 are fixed in the shell respectively. The official seal is located in the shell, and one end of the official seal is connected to the telescopic motor. The telescopic motor pushes the official seal up and down in the shell. The telescopic motor is fixed at the top of the shell.

[0019] The first phototransistor U1 is located below the second phototransistor U2;

[0020] The telescopic motor drives the official seal to move downward. When the official seal blocks the first phototransistor U1, the signal of the first phototransistor U1 is interrupted and there is no current. The control chip J1 cannot receive the electrical signal and the control chip J1 does not output the electrical signal. As a result, the telescopic motor stops working and the official seal stops at the designated position. The official seal is stamped on the surface of the paper to implement the stamping function.

[0021] When there is no official seal blocking the second phototransistor U2, when the second phototransistor U2 receives a signal, current passes through the second phototransistor U2 and enters a normal working state. The first phototransistor U1 transmits a signal to the control chip J1. At this time, the control chip J1 waits for the second phototransistor U2 to be powered off. The control chip J1 detects the information output by the second phototransistor U2. At this time, the control chip J1 controls the telescopic motor to retreat and reset the official seal. When the official seal reaches the second phototransistor U2, the control chip J1 stops the telescopic motor.

[0022] In this circuit, a third resistor R3 is provided between pin 2 and pin 1 of the first phototransistor U1, and the third resistor R3 is connected to the IR_VCC terminal. The third resistor R3 is used to protect the first phototransistor U1. In this circuit, the third resistor R3 is connected to the IR_VCC terminal through the first resistor R1. The first resistor R1 is used to limit the voltage input to the IR_VCC terminal.

[0023] A first diode D1 is disposed between pins 3 and 4 of the first phototransistor U1 , and the first diode D1 is connected to a ground terminal GND.

[0024] In this circuit, a fourth resistor R4 is provided between pin 2 and pin 1 of the second phototransistor U2, and the fourth resistor R4 is connected to the IR_VCC terminal. The fourth resistor R4 is used to protect the second phototransistor U2. In this circuit, the third resistor R3 is connected to the IR_VCC terminal through the second resistor R2. The second resistor R2 is used to limit the voltage input to the IR_VCC terminal.

[0025] In this circuit, a second diode D2 is provided between the 3rd and 4th pins of the first phototransistor U1, and the second diode D2 is connected to a ground terminal GND.

[0026] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. The official seal lock detection circuit includes a first connector J2 and a control chip J1, the first connector J2 and the control chip J1 are connected, and the second connector J2 is connected to a telescopic motor, characterized in that: It also includes a first phototransistor U1 and a second phototransistor U2. Pin 3 of the first phototransistor U1 is connected to pin 6 of the control chip J1, and pin 3 of the second phototransistor U2 is connected to pin 7 of the control chip J1.

2. The official seal lock detection circuit according to claim 1, characterized in that: A third resistor R3 is disposed between pin 2 and pin 1 of the first phototransistor U1 , and the third resistor R3 is connected to the IR_VCC terminal.

3. The official seal lock detection circuit according to claim 2 is characterized in that: The third resistor R3 is connected to the IR_VCC terminal via the first resistor R1.

4. The official seal lock detection circuit according to claim 1, characterized in that: A first diode D1 is disposed between pins 3 and 4 of the first phototransistor U1 , and the first diode D1 is connected to a ground terminal GND.

5. The official seal lock detection circuit according to claim 1, characterized in that: A fourth resistor R4 is disposed between pin 2 and pin 1 of the second phototransistor U2 , and the fourth resistor R4 is connected to the IR_VCC terminal.

6. The seal lock detection circuit according to claim 2, characterized in that: The third resistor R3 is connected to the IR_VCC terminal via the second resistor R2.

7. The seal lock detection circuit according to claim 1, characterized in that: A second diode D2 is disposed between pins 3 and 4 of the first phototransistor U1 , and the second diode D2 is connected to a ground terminal GND.

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