CN218416342U

CN218416342U - Electronic switch

Info

Publication number: CN218416342U
Application number: CN202222383956.7U
Authority: CN
Inventors: 张文顶; 胡大林; 廖兴群
Original assignee: Huizhou Highpower Technology Co Ltd
Current assignee: Huizhou Highpower Technology Co Ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-01-31
Anticipated expiration: 2032-09-07

Abstract

The utility model discloses an electronic switch relates to electron technical field, and this electronic switch includes: the device comprises a bleeder circuit, a switch signal generating circuit, a control chip, a capacitor and a key; one end of the key is connected with the anode of the power supply, the other end of the key is connected with one end of the capacitor, the other end of the capacitor is connected with the input end of the switching signal generating circuit, and the output end of the switching signal generating circuit is connected with the acquisition end of the control chip; two ends of the capacitor are connected with the bleeder circuit in parallel; the bleeder circuit can release the electric charge that remains in the electric capacity in the twinkling of an eye, and at next button press, the electric capacity can charge rapidly to output the rising edge signal, control switching signal generating circuit generates the switching signal, and control chip carries out the switching action according to this switching signal, has solved the problem that electronic switch can not effectual turn on and turn off.

Description

Electronic switch

Technical Field

The utility model relates to the field of electronic technology, in particular to electronic switch.

Background

With the rapid development of new energy, more and more lithium batteries are applied to various industries, and at present, a physical key switch is designed outside a plurality of lithium battery packs and is used as a starting switch for battery activation and output; the working principle of the key switch is mainly based on the mode of a spring piece mechanical contact, and after long-time use, the key switch is influenced by the service life and has certain probability of failure; in a conventional key circuit design, a mechanical key is usually directly connected between an I/O pin of a controller and the ground, if the mechanical key is pressed and cannot rebound, the mechanical key is always in a connected short circuit state, so that the I/O pin of the controller is continuously short-circuited to the ground and cannot normally work, the whole circuit also continuously has high leakage current, consumes the energy of a battery, and exhausts the electric quantity of the battery in a short time, so that the battery is deeply over-discharged and starved.

At present, in order to solve the above problems, an electronic switch is mainly used to control the switch of an I/O port of a controller, and the existing electronic switch mainly generates a rising edge signal by the instant charging of a capacitor, and implements the electronic switch by using the rising edge signal; for example, fig. 1 shows a patent with the grant numbers: CN206341451U, patent name: a two-wire system electronic switch attached figure, electric capacity C3 can produce the high level signal, control switch tube Q4 switches on, however, electric capacity C3 is equal to external power supply voltage at both ends voltage after full charge, if the electric charge in electric capacity C3 can not in time release, when charging next time, there is electric charge in electric capacity C3, electric capacity C3 is in the off-state, can not produce the rising edge signal, lead to electronic switch can not effectual turn on and off.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need to provide an electronic switch to solve the problem that the electronic switch in the prior art cannot be turned on or off effectively.

Based on the technical problem, the utility model provides an electronic switch, include:

the control circuit comprises a bleeder circuit, a switch signal generating circuit, a control chip, a capacitor and a key;

one end of the key is connected with the anode of the power supply, the other end of the key is connected with one end of the capacitor, the other end of the capacitor is connected with the input end of the switching signal generating circuit, and the output end of the switching signal generating circuit is connected with the acquisition end of the control chip; and two ends of the capacitor are connected with the bleeder circuit in parallel.

The scheme has the following beneficial effects:

the utility model discloses an electronic switch, when key control electric capacity disconnect power connects, the bleeder circuit can release remaining electric charge in the electric capacity in the twinkling of an eye, presses at the button next time, and electric capacity can charge rapidly to the edge signal rises in the output, control switch signal generating circuit generates switching signal, and control chip carries out the switching action according to this switching signal, has solved the problem that electronic switch can not effectually open and shut off.

Optionally, the bleeding circuit includes: the input end of the first branch circuit is connected with the first end of the capacitor, the control end of the first branch circuit is connected with the key, and the output end of the first branch circuit is grounded.

Optionally, the first branch includes: the input end of the first switch tube is connected with the first end of the capacitor, and the control end of the first switch tube is connected with the input end of the first switch tube;

the output end of the first switch tube is connected with one end of the first resistor, the other end of the first resistor is respectively connected with one end of the second resistor and the ground, and the other end of the second resistor is connected with the control end of the first switch tube.

Optionally, the first branch further includes: and the anode of the first diode is connected with the control end of the first switching tube, and the cathode of the first diode is connected with the first end of the capacitor.

Optionally, the bleeding circuit further includes: and the input end of the second branch circuit is connected with the second end of the capacitor, and the output end of the second branch circuit is grounded.

Optionally, the second branch includes: the cathode of the second diode is connected with the capacitor, and the anode of the second diode is grounded; the third resistor is connected in parallel to two ends of the second diode.

Optionally, the switching signal generating circuit includes: the input end of the second switch tube is connected with the acquisition end of the control chip, the control end of the second switch tube is connected with the second end of the capacitor, and the output end of the second switch tube is grounded.

Optionally, the electronic switch further includes: one end of the fourth resistor is connected with the control end of the first branch circuit, and the other end of the fourth resistor is connected with one end of the key.

Optionally, the electronic switch further comprises: the input end of the voltage stabilizing chip is connected with the battery, and the output end of the voltage stabilizing chip is used for outputting a power supply.

Optionally, the control chip further includes: the power supply end of the control chip is connected with the output end of the voltage stabilizing chip, and the grounding end of the control chip is grounded.

Drawings

FIG. 1 is a schematic diagram of a prior art electronic switching circuit;

fig. 2 is a schematic diagram of a first electronic switch circuit provided in an embodiment of the present invention;

fig. 3 is a schematic diagram of a second electronic switch circuit provided in an embodiment of the present invention;

fig. 4 is a schematic diagram of a third electronic switch circuit provided in an embodiment of the present invention;

fig. 5 is a schematic diagram of a fourth electronic switch circuit provided in an embodiment of the present invention;

the symbols are as follows:

1. a bleeding circuit; 11. a first branch; 12. a second branch; 2. a switching signal generating circuit; 3. a control chip; u1, a voltage stabilization chip; vcc +, positive pole of power supply; VIN, positive electrode of battery; v1, a switching signal.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail.

It should be appreciated that the embodiments set forth below represent the necessary information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.

It will be further understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

It will be further understood that the terms "upper," "lower," "left," "right," "front," "back," "bottom," "middle," "top," and the like may be used herein to describe various elements as to which an orientation or positional relationship is indicated, based on the orientation or positional relationship shown in the drawings, for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and thus, these elements should not be limited by these terms.

These terms are only used to distinguish one element from another. For example, a first element could be termed an "upper" element, and similarly, a second element could be termed an "upper" element, depending on the relative orientation of the elements, without departing from the scope of the present disclosure.

It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In one embodiment, there is provided an electronic switch as shown in fig. 2, the electronic switch comprising: the circuit comprises a bleeder circuit 1, a switching signal generating circuit 2, a control chip 3, a capacitor C1 and a key S1; wherein, the anodal Vcc + of power is connected to button S1 'S one end, and electric capacity C1' S one end is connected to button S1 'S the other end, and electric capacity C1' S the other end connects switching signal generating circuit 2 'S input, and switching signal generating circuit 2' S output connection control chip 3 'S collection end, electric capacity C1' S both ends parallel connection bleeder circuit 1.

The working process of the electronic switch is as follows:

when the key S1 is pressed down, one end of the capacitor C1 is connected with the positive electrode Vcc + of a power supply through the key S1, the capacitor C1 is quickly charged and instantly conducted, a rising edge pulse signal is generated at the other end of the capacitor C1, the rising edge pulse signal controls the switch signal generating circuit 2 to generate an instant first state switch signal V1, and the control chip 3 acquires the first state switch signal V1; when the capacitor C1 is fully charged, the key S1 is still in the on state, and at this time, the capacitor C1 is turned to the off state due to full charge, the other end of the capacitor C1 generates a falling edge pulse signal, the falling edge pulse signal controls the switching signal generating circuit 2 to generate the instantaneous second state switching signal V1, and the control chip 3 performs the switching operation according to the state change of the switching signal V1.

When the key S1 is released, the capacitor C1 is in a full state at this time, and the charge in the capacitor C1 is rapidly released through the bleeder circuit 1, so as to ensure that the capacitor C1 can be charged when the key S1 is pressed again, thereby conducting to generate a rising edge pulse signal.

According to the electronic switch, when the key controls the capacitor to be disconnected from a power supply, the bleeder circuit can instantly release residual charges in the capacitor, and the capacitor can be rapidly charged when the key is pressed next time, so that a rising edge signal is output, the switch signal generating circuit is controlled to generate a switch signal, the control chip executes a switching action according to the switch signal, and the problem that the electronic switch cannot be effectively switched on and off is solved.

In one embodiment, there is provided an electronic switch as shown in fig. 3, the electronic switch comprising: the circuit comprises a bleeder circuit 1, a switch signal generating circuit 2, a control chip 3, a capacitor C1 and a key S1; the connection modes of the bleeder circuit 1, the switching signal generation circuit 2, the control chip 3, the capacitor C1 and the key S1 are the same as those of the bleeder circuit 1, the switching signal generation circuit 2, the control chip 3, the capacitor C1 and the key S1 in fig. 2.

In this embodiment, the bleeder circuit 1 includes: the circuit comprises a first branch circuit 11 and a second branch circuit 12, wherein the input end of the first branch circuit 11 is connected with the first end of a capacitor C1, the control end of the first branch circuit 11 is connected with one end of a key S1, the other end of the key S1 is connected with the anode Vcc + of a power supply, and the output end of the first branch circuit 11 is grounded; the input end of the second branch 12 is connected to the second end of the capacitor C1, and the output end of the second branch 12 is grounded.

The first branch path 11 includes: switch tube Q2, resistance R2 and resistance R4, wherein, the first end of electric capacity C1 and the one end of button S1 are connected to switch tube Q2 ' S input, and electric capacity C1 ' S first end is also connected to switch tube Q2 ' S control end, and switch tube Q2 ' S output connecting resistance R2 ' S one end, resistance R2 ' S the other end is connecting resistance R4 ' S one end and ground respectively, and switch tube Q2 ' S control end is connected to resistance R4 ' S the other end.

The second branch 12 comprises: the diode D1 and the resistor R1, wherein the cathode of the diode D1 is respectively connected with the second end of the capacitor C1 and one end of the resistor R1, and the anode of the diode D1 is respectively connected with the other end of the resistor R1 and the ground.

In this embodiment, the switching signal generating circuit 2 includes a switching tube Q1, and the output end of the switching tube Q1 is connected to the acquisition end of the control chip 3 to output the switching signal V1 to the control chip 3, and the control end of the switching tube Q1 is connected to the second end of the capacitor C1, and the output end of the switching tube Q1 is grounded.

The working process of the electronic switch is as follows:

when the key S1 is pressed, the first end of the capacitor C1 is connected with the anode Vcc + of the power supply through the key S1, the capacitor C1 is charged quickly and conducted instantly, a rising edge pulse signal is generated at the second end of the capacitor C1, and the rising edge pulse signal controls the conduction of a switch tube Q1 in the switch signal generating circuit 2, so that the acquisition end of the control chip 3 is pulled down to the ground from a high-impedance state; at this time, the control end of the switching tube Q2 is at a high level, and the switching tube Q2 is cut off; when the capacitor C1 is fully charged, the key S1 is still in the on state, and at this time, the capacitor C1 is turned to the off state due to full charge, and the second end of the capacitor C1 generates a falling edge pulse signal to turn off the switching tube Q1 in the switching signal generating circuit 2, so that the acquisition end of the control chip 3 is turned to the high-impedance state, and the control chip 3 performs a switching operation according to the state change of the acquisition end.

When the key S1 is released, the capacitor C1 is in a full-charge state at this time, the resistor R4, the diode D1 and the two ends of the capacitor C1 in the first branch form a current loop, and the charge in the capacitor C1 is released instantaneously to ensure that the capacitor C1 can be charged when the key S1 is pressed down again, so that a rising edge pulse signal is generated by conduction.

The electronic switch of the embodiment has the following characteristics:

(1) When the key control capacitor is disconnected from a power supply, the resistor R4 in the first branch and the resistor D1 in the second branch form a current loop, residual charges in the capacitor C1 can be released instantly, the capacitor C1 can be charged rapidly when the key is pressed next time, so that a rising edge signal is output, the switching tube Q1 in the switching signal generating circuit 2 is controlled to be switched on, the acquisition end of the control chip 3 is switched to a high-resistance state from the high-resistance state, the control chip 3 executes switching action according to the state change of the acquisition end, and the problem that an electronic switch cannot be switched on and off effectively is solved.

(2) The resistor R1 is arranged, so that the control end of the switch tube Q1 in the switch signal generating circuit 2 is in a grounding state after the key S1 is loosened or the capacitor is fully charged, and the interference of an external signal to the switch tube Q1 is prevented.

In an embodiment, an electronic switch as shown in fig. 4 is provided, where the electronic switch is different from the electronic switch in fig. 3 in that the first branch 11 further includes a diode D2, an input terminal of the switching tube Q2 is connected to the first end of the capacitor C1 and a cathode of the diode D2, an anode of the diode D2 is connected to one end of the key S1 and a control terminal of the switching tube Q2, respectively, an output terminal of the switching tube Q2 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R4 and ground, respectively, and the other end of the resistor R4 is connected to the control terminal of the switching tube Q2; the other connection structure is the same as that of the electronic switch in fig. 3.

The working process of the electronic switch is as follows:

when the key S1 is pressed, the first end of the capacitor C1 is connected with the anode Vcc + of the power supply through the diode D2 in the first branch 11, the capacitor C1 is charged quickly and conducted instantly, a rising edge pulse signal is generated at the second end of the capacitor C1, the rising edge pulse signal controls the conduction of the switch tube Q1 in the switch signal generating circuit 2, and the acquisition end of the control chip 3 is pulled down to the ground from a high-impedance state; at this time, the control end of the switching tube Q2 is at a high level, and the switching tube Q2 is cut off; when the capacitor C1 is fully charged, the key S1 is still in the on state, and at this time, the capacitor C1 is turned to the off state due to full charge, and the second end of the capacitor C1 generates a falling edge pulse signal to turn off the switching tube Q1 in the switching signal generating circuit 2, so that the acquisition end of the control chip 3 is turned to the high-impedance state, and the control chip 3 performs a switching operation according to the state change of the acquisition end.

When the key S1 is released, at this time, the capacitor C1 is in a full-power state, the diode D2 in the first branch 11 is in a reverse cut-off state, the control end of the switching tube Q2 in the first branch 11 is grounded through the resistor R4, so that the switching tube Q2 is in a conducting state, the switching tube Q2, the resistor R2, the diode D1 in the second branch 12 and two ends of the capacitor C1 form a current loop, and the charge in the capacitor C1 is released instantaneously to ensure that the capacitor C1 can be charged when the key S1 is pressed down again, so that a rising edge pulse signal is generated by conducting.

The electronic switch of the embodiment has the following characteristics:

(1) When the key controls the capacitor to disconnect the power supply, the switch tube Q2 in the first branch, the resistor R2 and the D1 in the second branch form a current loop, so that the residual charges in the capacitor C1 can be released instantly, the capacitor C1 can be charged rapidly when the key is pressed next time, a rising edge signal is output, the switch tube Q1 in the switch signal generating circuit 2 is controlled to be switched on, the acquisition end of the control chip 3 is switched to a high-resistance state from the high-resistance state, the control chip 3 executes switching action according to the state change of the acquisition end, and the problem that the electronic switch cannot be switched on and off effectively is solved.

(2) The diode D2 is arranged, when the capacitor C1 discharges, the control end of the switch tube Q2 can be prevented from being at a high level, the switch tube Q2 can be effectively conducted, and therefore the electric charges of the capacitor C1 are released.

(3) The resistor R1 is arranged, so that the control end of the switch tube Q1 in the switch signal generating circuit 2 is in a grounding state after the key S1 is loosened or the capacitor is fully charged, and the interference of an external signal to the switch tube Q1 is prevented.

In one embodiment, there is provided an electronic switch as shown in fig. 5, which is different from the electronic switch in fig. 4 in that the electronic switch further includes: resistance R3, the one end of button S1 is connected to resistance R3 ' S one end, and the control end of first branch 11 is connected to resistance R3 ' S the other end, diode D2 ' S positive pole promptly, and this resistance R3 constitutes RC filter circuit with electric capacity C1, can filter clutter signal, makes electronic switch work more stable.

In this embodiment, the electronic switch further includes a voltage stabilizing chip U1, where the voltage stabilizing chip U1 includes an input terminal Vin, an output terminal Vout, and a ground terminal, and the control chip 3 further includes a power supply terminal VDD and a ground terminal, where the input terminal of the voltage stabilizing chip U1 is connected to the positive electrode Vin of the battery, the ground terminal of the voltage stabilizing chip U1 is grounded, the output terminal Vout of the voltage stabilizing chip U1 is connected to the power supply terminal VDD of the control chip 3, and the ground terminal of the voltage stabilizing chip 3 is grounded; the voltage stabilizing chip U1 is used as a power supply of an electronic switch, and the positive pole Vcc + of the power supply is output at the output end Vout.

The voltage stabilizing chip U1 of this embodiment can convert outside battery voltage into the power that other components and parts of control chip 3 and electronic switch are suitable for, and can stable output this power, has improved electronic switch's job stabilization nature.

In this embodiment, control chip's model is STM32, and the chip of this model adopts the modularized design, and the function is abundant, and the functioning speed is fast.

The working process of the electronic switch of the present embodiment is the same as that of the electronic switch in fig. 4, and the effect of the electronic switch in fig. 4 can be achieved.

The above-mentioned embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. An electronic switch, comprising: the control circuit comprises a bleeder circuit, a switch signal generating circuit, a control chip, a capacitor and a key;

one end of the key is connected with the anode of a power supply, the other end of the key is connected with one end of the capacitor, the other end of the capacitor is connected with the input end of the switching signal generating circuit, and the output end of the switching signal generating circuit is connected with the acquisition end of the control chip; and two ends of the capacitor are connected with the bleeder circuit in parallel.

2. The electronic switch of claim 1, wherein the bleed circuit comprises: the input end of the first branch circuit is connected with the first end of the capacitor, the control end of the first branch circuit is connected with the key, and the output end of the first branch circuit is grounded.

3. The electronic switch of claim 2, wherein the first branch comprises: the input end of the first switch tube is connected with the first end of the capacitor, and the control end of the first switch tube is connected with the input end of the first switch tube;

4. The electronic switch of claim 3, wherein the first branch further comprises: and the anode of the first diode is connected with the control end of the first switch tube, and the cathode of the first diode is connected with the first end of the capacitor.

5. The electronic switch of claim 2, wherein the bleed circuit further comprises: and the input end of the second branch circuit is connected with the second end of the capacitor, and the output end of the second branch circuit is grounded.

6. The electronic switch of claim 5, wherein the second branch comprises: the cathode of the second diode is connected with the capacitor, and the anode of the second diode is grounded; the third resistor is connected in parallel to two ends of the second diode.

7. The electronic switch of claim 1, wherein the switching signal generation circuit comprises:

the input end of the second switch tube is connected with the acquisition end of the control chip, the control end of the second switch tube is connected with the second end of the capacitor, and the output end of the second switch tube is grounded.

8. The electronic switch of claim 2, further comprising: one end of the fourth resistor is connected with the control end of the first branch circuit, and the other end of the fourth resistor is connected with the key.

9. The electronic switch of claim 1, further comprising: the input end of the voltage stabilizing chip is connected with the battery, and the output end of the voltage stabilizing chip is used for outputting a power supply.

10. The electronic switch of claim 9, wherein the control chip further comprises: the power supply end of the control chip is connected with the output end of the voltage stabilizing chip, and the grounding end of the control chip is grounded.