Stamping machine protection circuit

Abstract

The utility model particularly relates to a stamping machine protection circuit, which comprises a control mainboard, a transient suppression diode D2, a single comparator U1, a receiving end and an infrared transmitting end, the input end of the control mainboard is connected with the fourth pin of the single comparator U1, the fourth pin of the single comparator U1 is connected with the transient suppression diode D2, the receiving end is connected with the third pin of the single comparator U1, and the infrared transmitting end is connected with the input end of the control mainboard. The receiving end corresponds to the infrared transmitting end, and a pin 1 of the single comparator U1 is connected with a VCC end. The circuit has the beneficial effects that the transient suppression diode D2 is additionally arranged between the single comparator U1 and the control circuit, so that the single comparator U1 can be effectively protected from being damaged by overlarge current at low voltage.

Description

Technical Field

[0001] The utility model specifically relates to a protective circuit of a stamping machine. Background Art

[0002] When an object passes by and blocks the special light wave emitted by the transmitting end of the infrared transmitter, the receiving end of the infrared transmitter cannot receive the special light wave signal emitted by the transmitting end, and thus determines that the infrared transmitter has reached the program requirement setting.

[0003] Because the infrared transmitter will output a large current instantly during operation, it may cause damage to some components of the receiving circuit, creating a safety hazard. Summary of the invention

[0004] 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 stamp machine protection circuit with high safety performance and effective prevention of excessive transient current from burning electronic components.

[0005] According to the utility model, the stamp stamping machine protection circuit includes a control mainboard, which is characterized in that it also includes a transient suppression diode D2, a single comparator U1, a receiving end and an infrared transmitting end. The input end of the control mainboard is connected to the 4th pin of the single comparator U1, the 4th pin of the single comparator U1 is connected to the transient suppression diode D2, the receiving end is connected to the 3rd pin of the single comparator U1, the receiving end corresponds to the infrared transmitting end, and the 1st pin of the single comparator U1 is connected to the VCC end.

[0006] Specifically, the receiving end includes a first receiving end VQ1 and a second receiving end VQ2 connected in parallel, a common end on one side of the first receiving end VQ1 and the second receiving end VQ2 is respectively connected to the VCC end and the second capacitor C2, and the second capacitor C2 is also connected to the ground end GND.

[0007] Specifically, the other common ends of the first receiving end VQ1 and the second receiving end VQ2 are respectively connected to a fourth resistor R4 and a fifth resistor R5 , and the fourth resistor R4 is connected to pin 3 of the single comparator U1 .

[0008] Specifically, the fifth resistor R5 is connected in parallel with the third capacitor C3, and a common end of the fifth resistor R5 and one end of the third capacitor C3 is connected to a ground terminal GND.

[0009] Specifically, the pin 1 of the single comparator U1 is also connected to a third resistor R3, the third resistor R3 is connected in parallel with a first capacitor C1, the first capacitor C1 is connected to a second resistor R2, the second resistor R2 is connected to an OUT terminal, and the OUT terminal is connected to the control mainboard.

[0010] Specifically, a first resistor R1 is connected between pin 1 of the single comparator U1 and the VCC terminal.

[0011] Specifically, the infrared emitting end includes a sixth resistor R6, a seventh resistor R7, a second infrared light emitting diode U2 and a third infrared light emitting diode U3, the sixth resistor R6 is connected in series with the third infrared light emitting diode U3, and the seventh resistor R7 is connected in series with the second infrared light emitting diode U2.

[0012] The beneficial effect of the utility model is that the circuit can effectively protect the single comparator U1 by adding a transient suppression diode D2 between the single comparator U1 and the control circuit, and solve the problem that the single comparator U1 is easily damaged when the voltage is low and the current is too large. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 It is a circuit diagram of the utility model.

[0015] Figure 2 It is a circuit diagram of the infrared transmitting end 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 Figure 1 and Figure 2 The stamp machine protection circuit according to the embodiment of the utility model is described, including a control mainboard, a transient suppression diode D2, a single comparator U1, a receiving end and an infrared transmitting end. The input end of the control mainboard is connected to the 4th pin of the single comparator U1, the 4th pin of the single comparator U1 is connected to the transient suppression diode D2, the receiving end is connected to the 3rd pin of the single comparator U1, the receiving end corresponds to the infrared transmitting end, and the 1st pin of the single comparator U1 is connected to the VCC end.

[0018] This circuit can effectively protect the single comparator U1 by adding a transient suppression diode D2 between the single comparator U1 and the control circuit, and solve the problem that the single comparator U1 is easily damaged when the current is too large at low voltage.

[0019] The stamp machine is an existing structure, the receiving end and the infrared transmitting end are respectively installed in the stamp machine, the stamp in the stamp machine is driven by the telescopic motor, the stamp leaves the range between the receiving end and the infrared transmitting end, the infrared transmitting end irradiates the receiving end, the receiving end inputs information to the single comparator U1, the 4-pin output signal of the single comparator U1 is fed back to the control main board, and finally the control main board controls the telescopic motor to stop working, and the control main board defaults to stamp reset. In addition, the control main board is also connected to a control button.

[0020] When the control button is pressed, the control button outputs operation information, and the operation information is input into the control main board. The control main board controls the telescopic motor to be in working state. The stamp in the stamp machine is driven by the telescopic motor, and the stamp enters the range between the receiving end and the infrared transmitting end. The receiving end cannot receive the infrared information. When the single comparator U1 is in low voltage, the transient suppression diode D2 suppresses the current to prevent excessive current from pouring into the single comparator U1, thereby protecting the comparator U1.

[0021] The receiving end of this circuit includes a first receiving end VQ1 and a second receiving end VQ2 connected in parallel, and a common end on one side of the first receiving end VQ1 and the second receiving end VQ2 is respectively connected to the VCC end and the second capacitor C2, and the second capacitor C2 is also connected to the ground end GND. The first receiving end VQ1 and the second receiving end VQ2 are respectively located on the inner wall of the stamp stamping machine, and the first receiving end VQ1 and the second receiving end VQ2 are used to detect the position where the stamp moves and feed back to the single comparator U1. The first receiving end VQ1 and the second receiving end VQ2 can only be turned on when receiving infrared rays, and are respectively fed back to the 3rd pin of the single comparator U1.

[0022] The VCC terminal input voltage is sent to the single comparator U1 as a group reference voltage. Another group of voltages is input to the receiving end. The single comparator U1 compares the reference voltage with the other group of voltages and outputs the comparison voltage information.

[0023] The other common ends of the first receiving end VQ1 and the second receiving end VQ2 of the circuit are respectively connected to the fourth resistor R4 and the fifth resistor R5, and the fourth resistor R4 is connected to the 3rd pin of the single comparator U1. The fourth resistor R4 and the fifth resistor R5 are combined to limit the voltage, and the control voltage reaches the specified value and is input to the 3rd pin of the single comparator U1.

[0024] The fifth resistor R5 of the circuit is connected in parallel with the third capacitor C3, and the common end of the fifth resistor R5 and one end of the third capacitor C3 is connected to the ground terminal GND. The third capacitor C3 has the function of stabilizing the voltage.

[0025] The pin 1 of the single comparator U1 in this circuit is also connected to a third resistor R3, the third resistor R3 is connected in parallel with a first capacitor C1, the first capacitor C1 is connected to a second resistor R2, the second resistor R2 is connected to an OUT terminal, and the OUT terminal is connected to the control mainboard.

[0026] A first resistor R1 is connected between the pin 1 of the single comparator U1 described in this circuit and the VCC terminal. The first resistor R1 limits the voltage input to the VCC terminal. In addition, the infrared emitting terminal described in this circuit includes a sixth resistor R6, a seventh resistor R7, a second infrared light emitting diode U2 and a third infrared light emitting diode U3, the sixth resistor R6 is connected in series with the third infrared light emitting diode U3, and the seventh resistor R7 is connected in series with the second infrared light emitting diode U2. The VCC terminal supplies power to the second infrared light emitting diode U2 and the third infrared light emitting diode U3 respectively, and the sixth resistor R6 and the seventh resistor R7 limit the voltage respectively to prevent the voltage from damaging the second infrared light emitting diode U2 and the third infrared light emitting diode U3. The second infrared light emitting diode U2 and the third infrared light emitting diode U3 are respectively fixed on the inner wall of the stamp machine, the second infrared light emitting diode U2 corresponds to the first receiving terminal VQ1, and the second receiving terminal VQ2 corresponds to the third infrared light emitting diode U3.

[0027] 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 stamping machine protection circuit includes a control mainboard, which is characterized by: It also includes a transient suppression diode D2, a single comparator U1, a receiving end and an infrared transmitting end. The input end of the control mainboard is connected to the 4th pin of the single comparator U1, the 4th pin of the single comparator U1 is connected to the transient suppression diode D2, the receiving end is connected to the 3rd pin of the single comparator U1, the receiving end corresponds to the infrared transmitting end, and the 1st pin of the single comparator U1 is connected to the VCC end.

2. According to the stamping machine protection circuit of claim 1, it is characterized in that: The receiving end includes a first receiving end VQ1 and a second receiving end VQ2 connected in parallel, a common end at one side of the first receiving end VQ1 and the second receiving end VQ2 is respectively connected to the VCC end and the second capacitor C2, and the second capacitor C2 is also connected to the ground end GND.

3. According to claim 2, the stamping machine protection circuit is characterized in that: The other common ends of the first receiving end VQ1 and the second receiving end VQ2 are respectively connected to a fourth resistor R4 and a fifth resistor R5 , and the fourth resistor R4 is connected to pin 3 of the single comparator U1 .

4. The stamping machine protection circuit according to claim 3 is characterized in that: The fifth resistor R5 is connected in parallel with the third capacitor C3, and a common terminal of the fifth resistor R5 and one end of the third capacitor C3 is connected to a ground terminal GND.

5. The stamping machine protection circuit according to claim 1, characterized in that: Pin 1 of the single comparator U1 is also connected to a third resistor R3, the third resistor R3 is connected in parallel with a first capacitor C1, the first capacitor C1 is connected to a second resistor R2, the second resistor R2 is connected to an OUT terminal, and the OUT terminal is connected to the control mainboard.

6. The stamping machine protection circuit according to claim 1, characterized in that: A first resistor R1 is connected between pin 1 of the single comparator U1 and the VCC terminal.

7. The stamping machine protection circuit according to claim 1, characterized in that: The infrared emitting end comprises a sixth resistor R6, a seventh resistor R7, a second infrared light emitting diode U2 and a third infrared light emitting diode U3, the sixth resistor R6 is connected in series with the third infrared light emitting diode U3, and the seventh resistor R7 is connected in series with the second infrared light emitting diode U2.

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