CN217238406U

CN217238406U - Uncovering detection circuit and equipment with cover

Info

Publication number: CN217238406U
Application number: CN202221069492.6U
Authority: CN
Inventors: 丁哲壮; 马英兴
Original assignee: Dalian Gongjin Technology Co ltd
Current assignee: Dalian Gongjin Technology Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-08-19
Anticipated expiration: 2032-05-06

Abstract

The utility model provides a cover opening detection circuit and equipment with a shell cover, wherein the circuit comprises a key switch, a first resistor and a general input and output interface, the first pin of the key switch is respectively connected with the first resistor and the general input and output interface, the second pin, the third pin and the fourth pin of the key switch are respectively grounded, and the first resistor is also used for connecting a reference voltage; the key switch is arranged at a preset position contacted with the equipment shell cover and used for outputting a corresponding level signal through the universal input and output interface when the equipment shell cover is closed or opened. The embodiment realizes uncovering detection and protection based on the reset key, and reflects the closing and opening states of the equipment shell cover connected with the reset key through the change of the state signal of the reset key when being pressed and disconnected, so that the simple and low-cost uncovering detection of a circuit is realized.

Description

Uncovering detection circuit and equipment with cover

Technical Field

The utility model relates to a power equipment field particularly, relates to a detection circuitry uncaps and has equipment of cap.

Background

In the operation of equipment, especially in the fields of industrial control and the like, an operation button and line connection are generally arranged in a box body, if a household electric meter box is similar, a box cover is fastened to avoid misoperation, once the box cover is opened, if field construction is triggered by mistake, the operation of the equipment is easily interrupted or the operation mode is changed, so that the cover opening needs to be detected and protected, and once the cover is opened, the equipment is stopped to operate to avoid accidents.

The traditional uncovering detection method is to adopt devices such as a proximity switch and a Hall sensor to carry out uncovering detection, but the device is high in cost, complex in circuit and program processing and difficult to meet daily requirements, so that the uncovering detection circuit which is simple to realize and low in cost is designed, and the problem that needs to be solved urgently is to detect and protect the uncovering.

SUMMERY OF THE UTILITY MODEL

In a first aspect, the utility model provides a uncapping detection circuit, which comprises a key switch, a first resistor and a general input/output interface;

a first pin of the key switch is respectively connected with the first resistor and the general input/output interface, a second pin, a third pin and a fourth pin of the key switch are respectively grounded, and the first resistor is also used for accessing a reference voltage;

the key switch is arranged at a preset position contacted with the equipment shell cover and used for outputting a corresponding level signal through the universal input/output interface when the equipment shell cover is closed or opened.

In an optional embodiment, the system further comprises a controller, wherein the controller is connected to the general input/output interface and is used for receiving a corresponding level signal to control the operation or stop of a system inside the device.

In an optional implementation manner, the decap detection circuit further includes a second resistor, one end of the second resistor is connected to the first pin, and the other end of the second resistor is connected to the general input/output interface.

In an optional implementation manner, the decap detection circuit further includes an anti-jitter capacitor, one end of the anti-jitter capacitor is connected to the first resistor and the first pin, and the other end of the anti-jitter capacitor is grounded.

In an optional implementation manner, when the key switch is pressed down, the first pin and the second pin are conducted, the first pin is at a low level, the first pin is used for outputting the low level to the controller through the general input/output interface, and the controller is used for controlling normal operation of an internal system of the device.

In an optional implementation manner, when the key switch is turned off, the first pin and the second pin are not in conduction, the first pin is at a high level, the first pin is used for outputting the high level to the controller through the general input/output interface, and the controller is used for controlling an internal system of the device to stop operating.

In an alternative embodiment, the anti-jitter capacitor is a ceramic capacitor.

In an alternative embodiment, the key switch is a reset key.

In a second aspect, the present invention provides a device with a housing cover, comprising a housing cover and a cover opening detection circuit as described in any one of the previous embodiments.

In an alternative embodiment, the device with the housing cover is an electricity meter box.

The utility model has the advantages of as follows:

the utility model provides a cover opening detection circuit, which comprises a key switch, a first resistor and a general input/output interface, wherein a first pin of the key switch is respectively connected with the first resistor and the general input/output interface, a second pin, a third pin and a fourth pin of the key switch are respectively grounded, and the first resistor is also used for connecting a reference voltage; the key switch is arranged at a preset position contacted with the equipment shell cover and used for outputting a corresponding level signal through the universal input/output interface when the equipment shell cover is closed or opened. The embodiment realizes uncovering detection and protection based on the reset key, and reflects the closing and opening states of the equipment shell cover connected with the reset key through the change of the state signal of the reset key when being pressed and disconnected, so that the simple and low-cost uncovering detection of a circuit is realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a cover opening detection circuit provided in an embodiment of the present invention;

fig. 2 is another schematic structural diagram of the uncap detection circuit provided in the embodiment of the present invention.

Description of the main element symbols: 10-a controller; 20-a key switch; 30-general input/output interface; 40-a first resistance; 50-a second resistance; 60-capacitance; 1-a first pin; 2-a second pin; 3-a third pin; 4-fourth pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the equipment or components that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The embodiment provides equipment with a cover, which comprises an equipment cover and a cover opening detection circuit; the uncovering detection circuit is used for inputting a corresponding level signal to a controller in the equipment according to the opening or closing state of the cover of the equipment and detecting the level signal. The level signal reflects the state of the current equipment shell cover, when the level signal is at a high level, the equipment shell cover is in an open state, and when the level signal is at a low level, the equipment shell cover is in a cover state.

The uncovering detection circuit can protect internal parts of the equipment and prevent the internal parts of the equipment from being stolen. Be provided with key switch on the inside preset position of equipment, when the shell lid of equipment is opened or is closed at every turn, can structurally open or closed key switch, thereby can note the condition that equipment uncapped according to key switch's on-off state, so that the condition that the maintenance of equipment personnel check out the equipment shell uncapped, perhaps through the operation of uncapping of system real time monitoring, can in time report when detecting the operation of uncapping of violation, avoid equipment internals to be stolen, avoid causing economic loss.

In this embodiment, the device with a cover includes, but is not limited to, an electricity meter box, and the like, and is not limited herein.

For example, as shown in fig. 1, when the device case cover (case cover) is closed, the device case cover structurally presses the key switch 20, so that two contact points of the key switch 20 are turned on, at this time, a level signal at the contact points of the key switch 20 is at a low level, and the controller 10 connected to the key switch 20 correspondingly inputs the low level signal; when the case cover is opened, the key switch 20 is automatically flipped open, so that two contact points of the key switch 20 are disconnected, and at this time, a level signal at the contact point of the key switch 20 is at a high level, and the controller 10 connected to the key switch 20 correspondingly inputs the high level signal.

Referring to fig. 2, the present embodiment further provides a cover opening detection circuit, which includes a key switch 20(SW2901), a first resistor 40(R2901), and a general purpose input/output interface 30(GPIO _ 129); the first pin 1 of the key switch 20 is connected to the first resistor 40 and the general input/output interface 30, and the second pin 2, the third pin 3, and the fourth pin 4 of the key switch 20 are grounded, respectively.

The key switches 20 are disposed at preset positions contacted with the device cover, and are used for outputting corresponding level signals through the general input/output interface 30 when the device cover is closed or opened.

The uncovering detection circuit further comprises a controller 10, wherein the controller 10 is connected with the general input and output interface 30 to receive corresponding level signals so as to control the operation or stop of the internal system of the equipment.

In the present embodiment, the pressing end of the key switch 20 is pressed when the device cover is closed, and the key switch 20 pops up when the device cover is opened. The general input/output interface 30 is connected to the device controller 10 for transmitting a status signal of the key switch 20 to the controller 10, thereby allowing the device controller 10 to accurately know the current status of the device cover.

Illustratively, the key switch 20 may select a reset key, for example, a reset key of SW2901 type. The reset key is generally used for resetting operation in a circuit, and when the reset key is manually pressed, an electric signal output by the reset key is at a low level, so that the controller 10 is reset; when the device leaves the reset key, the reset key automatically recovers, the output electric signal of the reset key recovers to high level, and the device is not reset at the moment.

In a possible embodiment, the decap detection circuit further includes a second resistor 50(R2920), and the second resistor 50 is respectively connected to the first pin 1 and the gpio interface 30. The uncovering detection circuit further comprises a capacitor 60, one end of the capacitor 60 is connected with the first resistor 40 and the first pin 1, the other end of the capacitor 60 is grounded and used for de-jittering so as to prevent signal interference, namely, the capacitor 60(C2909) is used for de-jittering so as to prevent various interference signals from being applied to the circuit to form interference and cause misoperation.

Exemplarily, the capacitor 60 may be a ceramic capacitor, which has a high use temperature, a large specific capacity, a good moisture resistance, a small dielectric loss, and a large temperature coefficient of capacitance.

Exemplarily, the first resistor 40 is configured to access a reference voltage, the key switch 20 is configured to perform high level fixation through the first resistor 40, the first pin 1 is pulled up to a high level through the first resistor 40(R2901), the second pin 2, the third pin 3, and the fourth pin 4 are grounded, when the key switch 20 is pressed (the device cover is closed), the first pin 1 is connected with the second pin 2, and at this time, a level signal at the first pin 1 is a low level, and the terminal of the general input/output interface 30 is a low level. Wherein, the reference voltage can be a power supply of 3.3V.

That is, when the key switch 20 is closed (the device cover is closed), the first pin 1 and the second pin 2 are turned on, and the level signal at the first pin 1 is at a low level, then the level signal at the gpio interface 30 connected to the first pin 1 is at a low level, and the first pin 1 outputs a low level to the controller 10 through the gpio interface 30, which indicates that the device cover is closed (pressed), and the device controller 10 is configured to control the internal system to normally operate.

When the key switch 20 is restored (the cover of the device is opened), the first pin 1 and the second pin 2 of the key switch 20 are not conducted, and at this time, the level signal at the first pin 1 is at a high level, and the terminal of the general input/output interface 30 is at a high level.

That is, when the key switch 20 is turned off, the first pin 1 and the second pin 2 are not turned on, and the level signal at the first pin 1 is at a high level, the level signal at the gpio interface 30 connected to the first pin 1 is at a high level, and the first pin 1 outputs a high level to the controller 10 through the gpio interface 30, which indicates that the device cover is opened, and the device controller 10 is configured to control the internal system to stop operating.

It will be appreciated that the general purpose input output interface 30 is connected to the controller 10 of the device. When the controller 10 detects that the level signal at the gpio interface 30 is at a low level, it indicates that the device cover of the device is covered, and the controller 10 is configured to control normal operation of the internal system of the device, and when the level signal at the gpio interface 30 is at a high level, it indicates that the device cover of the device is closed, and the controller 10 is configured to control the internal system of the device to automatically stop.

The embodiment provides a uncovering detection circuit, which comprises a key switch 20, a first resistor 40 and a general input/output interface 30, wherein a first pin 1 of the key switch 20 is respectively connected with the first resistor 40 and the general input/output interface 30, a second pin 2, a third pin 3 and a fourth pin 4 of the key switch 20 are respectively grounded, and the first resistor 40 is also used for connecting a reference voltage; the key switch 20 is disposed at a predetermined position contacted with the device cover, and is configured to output a corresponding level signal through the general input/output interface 30 when the device cover is closed or opened. The embodiment realizes uncovering detection and protection based on the reset key, and reflects the closing and opening states of the equipment shell cover connected with the reset key through the change of the state signal of the reset key when being pressed and disconnected, so that the simple and low-cost uncovering detection of a circuit is realized.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, each functional module or unit in each embodiment of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which may be a smart phone, a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cover opening detection circuit is characterized by comprising a key switch, a first resistor and a general input/output interface;

2. The decap detecting circuit according to claim 1, further comprising a controller, connected to the general input/output interface, for receiving a corresponding level signal to control operation or stop of an internal system of the device.

3. The decap detecting circuit according to claim 1, further comprising a second resistor, wherein one end of the second resistor is connected to the first pin, and the other end of the second resistor is connected to the general input/output interface.

4. The decap detecting circuit according to claim 1, further comprising an anti-jitter capacitor, wherein one end of the anti-jitter capacitor is connected to the first resistor and the first pin, and the other end of the anti-jitter capacitor is grounded.

5. The uncovering detection circuit according to claim 2, wherein when the key switch is pressed, the first pin is conducted with the second pin, the first pin is at a low level, the first pin is used for outputting the low level to the controller through the general input and output interface, and the controller is used for controlling the normal operation of an internal system of the device.

6. The uncovering detection circuit according to claim 2, wherein when the key switch is turned off, the first pin and the second pin are not conducted, the first pin is at a high level, the first pin is used for outputting the high level to the controller through the general input and output interface, and the controller is used for controlling an internal system of the device to stop running.

7. The decap detecting circuit according to claim 4, wherein the debounce capacitor is a ceramic capacitor.

8. The decap detecting circuit according to claim 1, wherein the key switch is a reset key.

9. An apparatus having a cover, comprising a cover and the cover detection circuit according to any one of claims 1 to 8.

10. An apparatus with a cover according to claim 9, characterized in that the apparatus with a cover is a meter box.