Plugging terminal piece loosening detection circuit and power supply equipment

Abstract

The utility model discloses a loosening detection circuit of a plugging terminal. The detection circuit comprises a first power supply end, a second power supply end, a detection unit and a signal processing unit. The first power supply end is connected with the detection unit; the second power supply end is connected with the second connecting end; the detection unit is connected with the first connecting end and is used for outputting a loosening detection signal of the plugging terminal piece; the signal processing unit is connected with the detection unit, and the signal processing unit is used for receiving the loosening detection signal of the plugging terminal piece and determining whether the plugging terminal piece is loosened or not according to the loosening detection signal; wherein the first connecting end and the second connecting end are used for connecting two connecting ends of the plug-in terminal piece. According to the loosening detection circuit of the plug terminal piece, when the plug terminal piece is loosened, the corresponding detection signal can be detected and output, so that the signal processing unit can identify whether the plug terminal piece is loosened or not, corresponding processing is carried out, the safety of a circuit board is improved, and meanwhile, under the condition that the safety is guaranteed, the safety of the circuit board is improved. Model selection of devices in the circuit board is more flexible, and devices with low cost can be selected to save cost.

Description

Technical Field

[0001] This utility model relates to the detection of loosening of connector terminals, specifically to a connector loosening detection circuit and power supply device. Background Technology

[0002] With the continuous development and progress of technology, all kinds of products have entered users' lives. For all kinds of products, circuit boards are essential components. When the plug-in terminals of traditional circuit boards become loose, some circuits in the circuit board may have continuous current or generate open circuit high voltage, which may lead to damage to the downstream power module. In order to counteract this risk, the selection of various components in traditional circuit boards will be more risk-resistant, which will increase the cost of the circuit board. Utility Model Content

[0003] One objective of this invention is to provide a detection circuit for loose connector terminals, which can detect whether connector terminals are loose, thereby solving the safety risks and cost issues of various components on the circuit board caused by loose connector terminals.

[0004] Solution 1 provides a connector loosening detection circuit, which includes a first power supply terminal, a second power supply terminal, a detection unit, and a signal processing unit. The first power supply terminal is connected to the detection unit; the second power supply terminal is connected to a second connection terminal; the detection unit is connected to the first connection terminal and is used to output a connector loosening detection signal; the signal processing unit is connected to the detection unit and is used to receive the connector loosening detection signal and determine whether the connector is loose based on the loosening detection signal; wherein, the first connection terminal and the second connection terminal are used to connect the two connection terminals of the connector.

[0005] Based on Scheme 1, Scheme 2 is provided. The detection unit includes a first resistor, the first end of which is connected to a first power supply terminal, and the second end of which is connected to a first connection terminal and a signal processing unit.

[0006] Based on Option 2, Option 3 is provided, in which the first or second connecting end is connected to the connecting end corresponding to the first or last pin of the plug-in terminal piece.

[0007] Based on Option 2, Option 4 is provided, in which the detection unit outputs a low-level signal when the plug-in terminal is not loose, and outputs a high-level signal when the plug-in terminal is loose.

[0008] Based on Scheme 1, Scheme 5 is provided. The first connection terminal includes N first sub-terminals, the second connection terminal includes N second sub-terminals, and the detection unit includes a second resistor and N voltage divider resistors. The first ends of the N voltage divider resistors are connected in parallel and then connected to the second ends of the second resistor. The first ends of the second resistor are connected to the first power supply terminal. The second ends of the N voltage divider resistors are each connected to one of the N first sub-terminals. The N second sub-terminals are connected in parallel and then connected to the second power supply terminal. N is a positive integer and N≥2.

[0009] Based on Option 5, Option 6 is provided, in which N first sub-terminals or N second sub-terminals are respectively connected to the corresponding connection ends of the plug pins at both ends of the plug terminal piece.

[0010] Based on Scheme 6, Scheme 7 is provided, in which the detection unit outputs a first voltage signal when the plug-in terminal is properly plugged in; the detection unit outputs a second voltage signal when one end of the plug-in terminal is loose; and the detection unit outputs a third voltage signal when both ends of the plug-in terminal are loose. The first voltage signal, the second voltage signal, and the third voltage signal are all different from each other.

[0011] Based on options one through seven, option eight is provided, in which the signal processing unit includes an alarm device that issues an alarm indication when the connector terminal becomes loose.

[0012] Based on schemes one through seven, scheme nine is provided, where the first power supply terminal is one of the power supply terminal and the ground terminal, and the second power supply terminal is the other of the ground terminal and the power supply terminal.

[0013] Solution 10 provides a power supply device, including a plug-in terminal and a loosening detection circuit from any of Solutions 1 to 9.

[0014] One technical advantage of this invention is that it provides a loosening detection circuit for connector terminals. The detection circuit includes a first power supply terminal and a second power supply terminal, a detection unit, and a signal processing unit. The first power supply terminal is connected to the detection unit; the second power supply terminal is connected to a second connection terminal; the detection unit is connected to the first connection terminal and is used to output a loosening detection signal for the connector terminal; the signal processing unit is connected to the detection unit and is used to receive the loosening detection signal for the connector terminal and determine whether the connector terminal is loose based on the loosening detection signal; wherein, the first connection terminal and the second connection terminal are used to connect the two connection terminals of the connector terminal. The loosening detection circuit for connector terminals of this application can detect and output a corresponding detection signal when a connector terminal is loose, so that the signal processing unit can identify whether the connector terminal is loose and take corresponding action, thereby improving the safety of the circuit board. At the same time, while ensuring safety, the selection of components in the circuit board is more flexible, and lower-cost components can be selected to save costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a circuit for detecting loosening of plug-in terminals;

[0017] Figure 2 A connection circuit diagram of one embodiment of a plug-in terminal loosening detection circuit;

[0018] Figure 3 A connection circuit diagram of one embodiment of a plug-in terminal loosening detection circuit;

[0019] Figure 4 This is a connection circuit diagram of one embodiment of a plug-in terminal loosening detection circuit. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0022] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of the invention.

[0023] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0024] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0025] Terminal blocks include pairs of pins and sockets. Some terminal blocks have multiple pairs, each pair consisting of a pin and a matching socket. Multiple pins connected together form a male connector, and multiple sockets connected together form a female connector. Such terminal blocks are also called connector strips, pin headers, etc. When the male and female connectors are plugged in, multiple pins and sockets are connected, allowing signals to be transmitted from one component to another. For terminal blocks that require loosening detection, there are generally two or more pairs. One pair is used for transmitting electrical signals, and the other pair is used for loosening detection. In some applications, the pair used for loosening detection and the pair used for transmitting electrical signals can be shared as the same pair; this application does not exclude this approach.

[0026] like Figure 1 The circuit shown is for detecting the loosening of a connector terminal. The connector terminal includes a male and a female connector. The detection circuit includes a first power supply terminal, a second power supply terminal, a detection unit, and a signal processing unit. The first power supply terminal is connected to the detection unit; the second power supply terminal is connected to a second connection terminal; the detection unit is connected to the first connection terminal and is used to output a loosening detection signal of the connector terminal; the signal processing unit is connected to the detection unit and is used to receive the loosening detection signal of the connector terminal and determine whether the connector terminal is loose based on the loosening detection signal. The first connection terminal and the second connection terminal are used to connect the two connection terminals of the connector terminal.

[0027] The first power supply terminal and the second power supply terminal constitute a complete power supply. One of them is connected to the power supply terminal VCC, and the other is connected to the ground terminal, thereby realizing the detection power supply for the detection unit.

[0028] In one embodiment of this application, the detection unit may be a first resistor, wherein the first end of the first resistor is connected to the first power supply terminal, and the second end serves as an output port connected to the first connection terminal a and the signal detection unit.

[0029] like Figure 2As shown, the first resistor is R1. The first power supply terminal VCC is sequentially connected to the first resistor R1, the first connection terminal a, the plug pair, the second connection terminal b, and the second power supply terminal GND. The second end of the first resistor serves as the output port V1 of the detection unit, which is connected to the signal processing unit (not shown in this embodiment). The plug pair X includes a pin and a socket. In this embodiment, the first connection terminal a is connected to the socket, and the second connection terminal b is connected to the pin. In other embodiments, the pin and the socket can be interchanged. The first power supply terminal can be GND, and the second power supply terminal can be VCC. This is not limited here.

[0030] In this embodiment, the pin connected to the first connecting end a (or the second connecting end b) and the socket connected to the second connecting end b (or the first connecting end a) are corresponding. They can be any pair of plugs in the plug terminal components. Considering that the probability of loosening on both sides of the terminal component is greater than that in the middle, it is preferable to select the first or last plug pair of the plug terminal component. For example, if the first connecting end a is connected to the pin of the first plug pair, the corresponding second connecting end b should be connected to the socket of the first plug pair. If the second connecting end b is connected to the pin of the first plug pair, the corresponding first connecting end a should be connected to the socket of the first plug pair.

[0031] like Figure 2 As shown, when the connectors are properly connected, the output port V1 of the detection unit outputs a low-level signal; when the connectors are loose, the output port V1 of the detection unit outputs a high-level signal.

[0032] In this embodiment, the output port V1 of the detection unit will output different electrical signals when the plug-in terminal is loose and when it is not loose. Based on the electrical signals output by the output port of the detection unit, the signal processing unit determines whether the terminal is loose and controls the circuit board to work according to the loose detection signal.

[0033] In this embodiment, the loosening detection circuit may also include a signal processing unit. This signal processing unit can be a hardware module such as an MCU or a PWM device. The signal processing unit can be connected to the detection module and can determine whether the pins and sockets of the connector are loose based on the loosening detection signal output by the detection unit. Furthermore, upon receiving the loosening detection signal from the detection module, the circuit board can also be controlled to operate based on the loosening detection signal.

[0034] For example, when the signal processing unit receives a loosening detection signal from the detection module indicating that the connector is properly connected and not loose, it can normally supply power to the circuit board or control the devices and circuits on the circuit board to operate. However, if the connector's socket or pin is not properly inserted, the signal processing unit receives a loosening detection signal from the detection module indicating that the connector is loose. The signal processing unit can then turn off or disconnect the power supply, or control the circuits on the circuit board to stop operating, preventing dangerous situations from occurring.

[0035] In one example of this embodiment, the signal processing unit is connected to the detection unit via an output port.

[0036] In one example of this embodiment, the output port outputs a low-level signal when the plug-in terminal is not loose, and outputs a high-level signal when the plug-in terminal is loose.

[0037] In this embodiment of the application, where the first power supply terminal is directly connected to the detection unit, when the signal processing unit receives a low-level signal, meaning the connector is not loose, the circuit board can operate normally. Conversely, when the signal processing unit receives a high-level signal, indicating that the pins and sockets of the connector are loose, the signal processing unit can control the circuit board's power supply to disconnect or stop, or it can control the various functional modules on the circuit board to stop working to avoid potential danger.

[0038] In other embodiments, the signal processing unit may also include an alarm device, such as a light-emitting diode or a buzzer, to issue an alarm indication when the connector terminal is loose, prompting maintenance personnel to perform repairs.

[0039] In other embodiments, the first connection terminal may include N first sub-terminals, the second connection terminal includes N second sub-terminals, and the detection unit includes a second resistor and N voltage divider resistors. The first ends of the N voltage divider resistors are connected in parallel and then connected to the second ends of the second resistor. The first ends of the second resistor are connected to the first power supply terminal. The second ends of the N voltage divider resistors are respectively connected to one of the N first sub-terminals, and the N second sub-terminals are connected in parallel and then connected to the second power supply terminal. N is a positive integer and N≥2.

[0040] like Figure 3As shown, the loosening detection circuit includes N first sub-terminals a1, a2`...aN and N second sub-terminals b1, b2`...bN and N voltage divider resistors R31, R32`...R3N. The first ends of the N voltage divider resistors R31, R32`...R3 are connected in parallel to form a first parallel connection point. The N second sub-terminals b1, b2`...Bn are connected in parallel to form a second parallel connection point. The first power supply terminal VCC is connected to the second resistor R2. The other end of the second resistor R2 is connected to the first parallel connection point. The second power supply terminal GND is connected to the second parallel connection point. The second end of each voltage divider is used as one of its first sub-terminals and connected to any plug pair X. Similarly, the plug pair X includes pins and sockets. In this embodiment, the first sub-terminals a1, a2, ..., aN are connected to the sockets, and the second sub-terminals b1, b2, ..., bN are connected to the pins. In other embodiments, the pins and sockets can be interchanged. For example, the first sub-terminal a1 is connected to the socket, and the corresponding second sub-terminal b1 is connected to the pin; the first sub-terminal a2 is connected to the pin, and the corresponding second sub-terminal b2 is connected to the socket. The configuration can be set as needed and is not limited here.

[0041] In this embodiment, the N plug pairs can be selected from the plug pairs located at both ends of the plug terminal piece, that is, the N first sub-ends or the N second sub-ends are respectively connected to the corresponding connection ends of the plugs at both ends of the plug terminal piece.

[0042] Furthermore, when the connector is properly connected, the detection unit outputs a first voltage signal; when one end of the connector is loose, the detection unit outputs a second voltage signal; and when both ends of the connector are loose, the detection unit outputs a third voltage signal. The first, second, and third voltage signals are all different from each other.

[0043] Taking N=2 as an example, such as Figure 4 As shown, the first power supply terminal VCC is sequentially connected to the second resistor R2, the first parallel connection point, and two voltage divider resistors R31 and R32. The two plug pairs, the second parallel connection point, and the second power supply terminal GND form a complete power supply circuit. In this case, the leftmost terminal can be connected to the first connection terminal a1 and the second connection terminal b1, and the rightmost terminal can be connected to the first connection terminal a2 and the second connection terminal b2. In this embodiment, the first power supply terminal is VCC and the second power supply terminal is GND. In other embodiments, the first power supply terminal can be GND and the second power supply terminal can be VCC; this is not a limitation.

[0044] Taking N=2 as an example, when the connector is properly connected (both connector pairs are connected), both voltage divider resistors are connected to the circuit, and the detection unit outputs the first voltage signal as V*(R31 / / R32) / ((R31 / / R32)+R2), where V represents the VCC input voltage value, and R31 / / R32 represents the resistance value of the voltage divider resistors R31 and R32 connected in parallel. When one end of the connector is loose (only one connector pair is connected), only one voltage divider resistor (such as R31) is connected to the circuit, and the detection unit outputs the second voltage signal as V*R31 / (R31+R2). When both ends of the connector are loose (i.e., the connector is completely disconnected), neither connector pair is connected, and neither voltage divider resistor is connected to the circuit, and the detection unit outputs the third voltage signal as V. It can be seen that the first, second, and third voltage signals are different from each other.

[0045] The power supply device provided according to the embodiments of this disclosure may include a plug-in terminal and a plug-in terminal loosening detection circuit, as described in any of the embodiments.

[0046] In this embodiment, a power supply device is provided, including a connector terminal and a connector loosening detection circuit. The loosening detection circuit includes a power supply, a detection unit, and a signal processing unit. Through the connector loosening detection circuit of this application, when a connector becomes loose, the loosening can be detected immediately, and a detection signal can be output for subsequent power-off or control of the circuit board to stop working.

[0047] In one embodiment, the power supply device further includes a display device for displaying the detection results of the loosening detection circuit.

[0048] Here, the display device can be a screen, on which output values, detection results, and alarm information can be displayed. The display device can also be an alarm light, which can display different colors depending on the detection status, such as green or not lit if not loose, orange if loose on one side, and red if both sides are completely loose; alternatively, different numbers of lights can be lit based on the detection results, such as one red light for loose on one side and two red lights for complete loosening, etc.

[0049] In addition, an alarm device can be installed. When the device becomes loose, it will sound an alarm and send the alarm information to the relevant personnel.

[0050] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A loosening detection circuit for connector terminals, characterized in that, The loosening detection circuit includes a first power supply terminal, a second power supply terminal, a detection unit, and a signal processing unit; The first power supply terminal is connected to the detection unit; The second power supply terminal is connected to the second connection terminal; The detection unit is connected to the first connection end and is used to output a loosening detection signal of the connector terminal; A signal processing unit is connected to the detection unit. The processing unit is used to receive the loosening detection signal of the plug-in terminal and determine whether the plug-in terminal is loose based on the loosening detection signal. The first connecting end and the second connecting end are used to connect the two connecting ends of the plug-in terminal piece.

2. The loosening detection circuit according to claim 1, characterized in that, The detection unit includes a first resistor, a first end of which is connected to the first power supply terminal, and a second end of which is connected to the first connection terminal and the signal processing unit.

3. The loosening detection circuit according to claim 2, characterized in that, The first or second connection end is connected to the connection end corresponding to the first or last pin of the plug-in terminal piece.

4. The loosening detection circuit according to claim 2, characterized in that, If the connector is not loose, the detection unit outputs a low-level signal; When the connector becomes loose, the detection unit outputs a high-level signal.

5. The loosening detection circuit according to claim 1, characterized in that, The first connection terminal includes N first sub-terminals, the second connection terminal includes N second sub-terminals, and the detection unit includes a second resistor and N voltage divider resistors; In this configuration, the first ends of the N voltage divider resistors are connected in parallel and then connected to the second end of the second resistor. The first end of the second resistor is connected to the first power supply terminal. The second ends of the N voltage divider resistors are each connected to one of the N first sub-terminals. The N second sub-terminals are connected in parallel and then connected to the second power supply terminal. N is a positive integer and N≥2.

6. The loosening detection circuit according to claim 5, characterized in that, N first sub-terminals or N second sub-terminals are respectively connected to the corresponding connection ends of the plug pins at both ends of the plug terminal piece.

7. The loosening detection circuit according to claim 6, characterized in that, When the connector is properly connected, the detection unit outputs a first voltage signal; When one end of the connector becomes loose, the detection unit outputs a second voltage signal; When both ends of the connector are loose, the detection unit outputs a third voltage signal; The first voltage signal, the second voltage signal, and the third voltage signal are all different from each other.

8. The loosening detection circuit according to any one of claims 1-7, characterized in that, The signal processing unit includes an alarm device that issues an alarm indication when the connector terminal becomes loose.

9. The loosening detection circuit according to any one of claims 1-7, characterized in that, The first power supply terminal is one of the power supply terminal and the ground terminal, and the second power supply terminal is the other of the ground terminal and the power supply terminal.

10. A power supply device, characterized in that, It includes plug-in terminal components and the loosening detection circuit as described in any one of claims 1-9.

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