A pulse-triggered self-locking push button switch based on T' trigger

Abstract

The present invention discloses a pulse-triggered self-locking button based on a T' trigger, belonging to the field of circuit-type switches. Short-circuit metal sheets are attached to the four corners of the button base and connected to the voltage input Vin+ terminal; a short-circuit metal ring is attached to the upper surface of the button base; the lower surface of the button base has a first pin, a second pin, a third pin, and a fourth pin, which are respectively connected to the voltage input Vin+ terminal, the voltage input GND terminal, the voltage output Vout+ terminal, and the voltage output GND terminal of an embedded logic control circuit; the four corners of the contact metal hollow raised button are tightly attached to the four short-circuit metal sheets on the button base; a pulse-triggered switch S1 is formed between the contact metal hollow raised button and the short-circuit metal ring. The present invention adopts the T' trigger flip principle to control the MOS tube to turn off and on to achieve self-locking and opening of the switch, eliminating the need for microprocessor control, saving the cost of the entire system, and making the contact button switch more widely applicable.

Description

Technical Field

[0001] The present invention relates to the technical field of digital circuits, and in particular to a pulse-triggered self-locking push button switch based on a T' trigger. Background Art

[0002] The known self-locking switches are all mechanical self-locking. This design has some disadvantages: it takes up a large space, is not conducive to high integration, the mechanical contact is not sensitive, the mechanical part is easily damaged over time, and conventional button switches will jitter during use, requiring manual setting of an anti-jitter circuit or anti-jitter program, etc. The currently commonly used button self-locking circuit uses a processor to control a transistor or MOS tube to achieve circuit self-locking, which requires adding a microprocessor to the circuit. This not only occupies the resources of the microprocessor, but also increases the cost and complexity of the entire circuit in some places where a microprocessor is not needed. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a pulse-triggered self-locking push button switch based on a T' trigger. By utilizing the circuit self-locking and level flipping functions of the T' trigger to realize the conduction and shutdown of the P-MOS tube, thereby realizing the self-locking conduction and shutdown of the switch, the circuit overcomes the problems of large space occupation and difficulty in integration, and has a wider range of application scenarios.

[0004] In order to achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: a pulse-triggered self-locking button based on a T' trigger, comprising a contact metal hollow raised button, a short-circuit metal ring, a short-circuit metal sheet, a button base, and an embedded logic control circuit; the short-circuit metal sheet is attached to the four corners of the button base; the short-circuit metal ring is attached to the upper surface of the button base; the lower surface of the button base has a first pin, a second pin, a third pin and a fourth pin; the four corners of the contact metal hollow raised button are tightly attached to the four-corner short-circuit metal sheets on the button base; a pulse-triggered switch S1 is formed between the contact metal hollow raised button and the short-circuit metal ring; the first pin and the short-circuit metal sheet are both connected to the voltage input Vin+ end of the embedded logic control circuit; the second pin is connected to the voltage input GND end of the embedded logic control circuit; the third pin is connected to the voltage output Vout+ end of the embedded logic control circuit; and the fourth pin is connected to the voltage output GND end of the embedded logic control circuit.

[0005] Furthermore, the embedded logic control circuit includes a T' trigger, a level inverter, a power P-MOS tube, a resistor R, and a resistor R. The signal input end of the T' trigger is connected to the short-circuit metal ring, the signal output end of the T' trigger is connected to the input end of the level inverter, and the output end of the level inverter is connected to the gate of the power P-MOS tube. The source of the power P-MOS tube is electrically connected to the short-circuit metal sheet and serves as the voltage input Vin+ end, and the drain of the power P-MOS tube serves as the voltage output Vout+ end. The short-circuit metal ring is also connected to one end of the resistor R, and the other end of the resistor R serves as the voltage input GND end; the drain of the power P-MOS tube is also connected to one end of the resistor R, and the other end of the resistor R serves as the voltage output GND end.

[0006] Furthermore, the embedded logic control circuit is embedded inside the button base.

[0007] Furthermore, it also includes an LED indicator light, which is attached to the upper surface of the button base; the LED indicator light is located in the middle of the short-circuit metal ring.

[0008] Furthermore, the positive end of the LED indicator light is connected to the fourth pin, the negative end is connected to one end of a resistor, and the other end of the resistor is grounded.

[0009] Furthermore, when the switch is turned on, an LED indicator light attached to the surface of the button base is on, and when the switch is turned off, the LED indicator light attached to the surface of the button base is off.

[0010] Furthermore, when the metal hollow raised button is pressed and deformed and contacts the short-circuit metal ring, a short circuit is formed between the short-circuit metal ring and the short-circuit metal sheet, thereby triggering the internal T' trigger level signal to flip.

[0011] Furthermore, the metal hollow raised button is hollowed out in the middle and around, and the middle is raised in an arc shape. The four sides are connected to the short-circuit metal sheet on the button base. The hollow part is used to pass the light of the LED indicator light, and the raised part prevents contact with the short-circuit metal ring without external force.

[0012] The beneficial effects of the present invention are as follows: the push button switch provided by the present invention is miniaturized, saving the longitudinal and lateral space of a mechanical push button self-locking switch, reducing the space used in the circuit board, and facilitating high integration of the circuit; it can save expensive microprocessor components on a contact switch circuit that requires self-locking, reducing the cost of the entire circuit and saving the resource space of the microprocessor in the circuit; the switch structure is simple, the required integrated circuit cost is low, and there are more choices on many circuit boards that do not require expensive microprocessors but want to use contact self-locking switches; the emergence of this switch can further promote the lightweight, miniaturization, ultra-thinness of electronic products, and eliminate the need for external debouncing circuits and software program processing to eliminate jitter pulses. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a mechanical exploded view of the key parts of a pulse-triggered self-locking push button switch based on a T' trigger;

[0015] Figure 2 The mechanical diagram of the top contact spring of the pulse-triggered self-latching push button switch based on the T' trigger;

[0016] Figure 3 This is a schematic diagram of the top portion of the base of a pulse-triggered self-locking push button switch based on a T' trigger;

[0017] Figure 4 This is a schematic diagram of the bottom portion of the base of a pulse-triggered self-locking push button switch based on a T' trigger;

[0018] Figure 5 The overall mechanical design diagram of the pulse-triggered self-locking push button switch based on the T' trigger;

[0019] Figure 6 This is the internal circuit design diagram of the pulse-triggered self-locking push button switch based on the T' trigger;

[0020] Among them: contact metal hollow raised button 1, LED indicator light 2, short-circuit metal ring 3, short-circuit metal sheet 4, button base 5, embedded logic control circuit 6, first pin 7, second pin 8, third pin 9, fourth pin 10. DETAILED DESCRIPTION

[0021] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. In the following description and drawings, unless otherwise indicated, identical numbers in different figures represent identical or similar elements. The embodiments described in the following exemplary embodiments are not intended to represent all possible implementations consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims. The various embodiments of this specification are described in a progressive manner.

[0022] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] like Figure 1-6 As shown, this embodiment provides a pulse-triggered self-locking button based on a T' trigger, comprising a contact metal hollow raised button 1, a short-circuit metal ring 3, a short-circuit metal sheet 4, a button base 5, and an embedded logic control circuit 6;

[0025] The short-circuit metal sheet 4 is attached to the four corners of the button base 5;

[0026] The short-circuit metal ring 3 is attached to the upper surface of the button base 5;

[0027] The lower surface of the button base 5 has a first pin 7, a second pin 8, a third pin 9 and a fourth pin 10;

[0028] The four corners of the metal hollow raised button 1 are tightly attached to the four-corner short-circuit metal sheets 4 on the button base 5; a pulse trigger switch S1 is formed between the metal hollow raised button 1 and the short-circuit metal ring 3;

[0029] The first pin 7 and the short-circuit metal sheet 4 are both connected to the voltage input Vin+ terminal of the embedded logic control circuit 6;

[0030] The second pin 8 is connected to the voltage input GND terminal of the embedded logic control circuit 6;

[0031] The third pin 9 is connected to the voltage output Vout+ terminal of the embedded logic control circuit 6;

[0032] The fourth pin 10 is connected to the voltage output GND terminal of the embedded logic control circuit 6 .

[0033] In this embodiment, the embedded logic control circuit 6 includes a T' trigger, a level inverter, a power P-MOS transistor, a resistor R1, and a resistor R2. The signal input end of the T' trigger is connected to the short-circuit metal ring 3, the signal output end of the T' trigger is connected to the input end of the level inverter, and the output end of the level inverter is connected to the gate of the power P-MOS transistor. The source of the power P-MOS transistor is electrically connected to the short-circuit metal sheet 4 and serves as the voltage input Vin+ end, and the drain of the power P-MOS transistor serves as the voltage output Vout+ end. The short-circuit metal ring 3 is also connected to one end of the resistor R1, and the other end of the resistor R1 serves as the voltage input GND end; the drain of the power P-MOS transistor is also connected to one end of the resistor R2, and the other end of the resistor R2 serves as the voltage output GND end.

[0034] like Figure 6 As shown, the T' flip-flop consists of four dual-input NAND gates and two three-input NAND gates. The state equation Q = Q'(CP↑) is used to realize the flip-flop output level signal inversion. When the T' flip-flop output signal is high and connected to the input of the inverter, the output of the level inverter outputs an opposite level signal, which pulls down the gate (G pole) of the P-MOS tube to turn on the power P-MOS tube and keep the switch open.

[0035] In this embodiment, to facilitate user identification of the switch's on / off status during use, the pulse-triggered, self-locking pushbutton based on a T' trigger also includes an LED indicator 2, attached to the upper surface of the pushbutton base 5; the LED indicator 2 is located in the center of the short-circuit metal ring 3. The specific electrical connections are as follows: the positive terminal of the LED indicator is connected to the fourth pin, the negative terminal is connected to one end of a 2K ohm resistor, and the other end of the resistor is grounded. When the switch is on, the LED indicator 2 attached to the pushbutton base 5 illuminates; when the switch is off, the LED indicator 2 attached to the pushbutton base 5 is off.

[0036] In this embodiment, the metal hollow raised button 1 is hollowed out in the middle and around, and the middle is arc-shaped and raised. The four sides are connected to the short-circuit metal sheet 4 of the button base 5. The hollow part is used to pass the light of the LED indicator, and the raised part prevents contact with the short-circuit metal ring 3 without external force.

[0037] When the metal hollow raised button 1 is pressed and bent and deformed, it contacts the short-circuit metal ring 3, forming a short circuit between the short-circuit metal ring 3 and the short-circuit metal sheet 4. The T' trigger receives the rising edge of the signal transmitted by the button and flips and maintains the output level signal of the trigger. The level inverter flips the level signal of the trigger output end and outputs it to the gate of the power P-MOS tube to control the on and off of the power P-MOS tube. When the gate of the power P-MOS tube receives a low level from the output end of the level inverter, the power P-MOS tube is turned on to keep the circuit open, thereby realizing the switching function.

[0038] The pulse-triggered self-locking button based on the T' trigger provided in the above embodiment can be used in cost-saving simple circuits and electronic circuits that do not want to occupy microprocessor resources but want to achieve circuit self-locking while reducing the circuit space occupied by the mechanical switch.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pulse-triggered self-locking button based on a T' trigger, characterized in that: It comprises a contact metal hollow raised button (1), a short-circuit metal ring (3), a short-circuit metal sheet (4), a button base (5), and an embedded logic control circuit (6); the short-circuit metal sheet (4) is attached to the four corners of the button base (5); the short-circuit metal ring (3) is attached to the upper surface of the button base (5); The lower surface of the button base (5) has a first pin (7), a second pin (8), a third pin (9) and a fourth pin (10); the four corners of the contact metal hollow raised button (1) are tightly attached to the four corner short-circuit metal sheets (4) on the button base (5); a pulse trigger switch S1 is formed between the contact metal hollow raised button (1) and the short-circuit metal ring (3); the first pin (7) and the short-circuit metal sheet (4) are both connected to the voltage input Vin+ end of the embedded logic control circuit (6); the second pin (8) is connected to the voltage input GND end of the embedded logic control circuit (6); the third pin (9) is connected to the voltage output Vout+ end of the embedded logic control circuit (6); the fourth pin (10) is connected to the voltage The output GND end is connected; the embedded logic control circuit (6) includes a T' trigger, a level inverter, a power P-MOS tube, a resistor R1, and a resistor R2. The signal input end of the T' trigger is connected to the short-circuit metal ring (3), the signal output end of the T' trigger is connected to the input end of the level inverter, and the output end of the level inverter is connected to the gate of the power P-MOS tube. The source of the power P-MOS tube is electrically connected to the short-circuit metal sheet (4) and serves as the voltage input Vin+ end. The drain of the power P-MOS tube serves as the voltage output Vout+ end. The short-circuit metal ring (3) is also connected to one end of the resistor R1, and the other end of the resistor R1 serves as the voltage input GND end. The drain of the power P-MOS tube is also connected to one end of the resistor R2, and the other end of the resistor R2 serves as the voltage output GND end.

2. The pulse-triggered self-locking push button switch based on the T' trigger according to claim 1, characterized in that: The embedded logic control circuit (6) is embedded inside the button base (5).

3. The pulse-triggered self-locking push button switch based on the T' trigger according to claim 1, characterized in that: It also includes an LED indicator light (2), which is attached to the upper surface of the button base (5); the LED indicator light (2) is located in the middle of the short-circuit metal ring (3).

4. The pulse-triggered self-locking push button switch based on the T' trigger according to claim 3, characterized in that: The positive end of the LED indicator light (2) is connected to the fourth pin (10), the negative end is connected to one end of a resistor, and the other end of the resistor is grounded.

5. The pulse-triggered self-locking push button switch based on the T' trigger according to claim 1, characterized in that: When the switch is turned on, the LED indicator light (2) attached to the surface of the button base (5) is on, and when the switch is turned off, the LED indicator light (2) attached to the surface of the button base (5) is off.

6. The pulse-triggered self-locking push button switch based on a T' trigger according to claim 1, characterized in that: When the metal hollow raised button (1) is pressed and deformed to contact the short-circuit metal ring (3), a short circuit is formed between the short-circuit metal ring (3) and the short-circuit metal sheet (4), thereby triggering the internal T' trigger level signal to flip.

7. The pulse-triggered self-locking push button switch based on a T' trigger according to claim 1, characterized in that: The metal hollow raised button (1) is hollowed out in the middle and around, and the middle is raised in an arc shape. The four sides are connected to the short-circuit metal sheet (4) of the button base (5). The hollow part is used to pass the light of the LED indicator light, and the raised part prevents contact with the short-circuit metal ring (3) without external force.

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