CN219369968U - Insertion detection circuit, USB female seat and electronic equipment - Google Patents

Abstract

The embodiment of the application discloses an insertion detection circuit, a USB female seat and electronic equipment, wherein the insertion detection circuit is connected with the USB female seat, the USB female seat is used for being plugged by a USB male seat to realize electric connection between the USB male seat and the USB female seat, the USB female seat comprises a metal shell and a detection terminal which are mutually spaced, the insertion detection circuit comprises a level providing circuit and a grounding circuit, and the level providing circuit is connected with one of the metal shell and the detection terminal and is used for providing a level signal; the grounding circuit is connected with the other one of the metal shell and the detection terminal and is used for grounding; when the USB male seat is inserted into the USB female seat, the metal shell and the detection terminal are not conducted, the detection terminal outputs a first level signal to the controller, when the USB male seat is inserted into the USB female seat, the metal shell is conducted with the detection terminal, and the detection terminal outputs a second level signal different from the first level signal, so that the insertion detection of the USB male seat can be realized through the insertion detection circuit.

Description

Insertion detection circuit, USB female seat and electronic equipment

Technical Field

The present application relates to the field of connectors, and more particularly, to an insertion detection circuit, a USB socket, and an electronic device.

Background

As electronics technology has evolved rapidly, USB (Universal Serial Bus ) connectors are commonly employed between various electronic devices to enable electrical connection and signal transfer therebetween. The USB connector is currently a standard USB2.0/USB3.0 connector, a Mini-USB connector and a Micro-USB connector. The USB connector is composed of a USB female seat and a USB male seat, when the USB male seat is inserted into the USB female seat, the USB connector can be electrically connected with the USB male seat and the USB female seat to realize signal connection, and in order to detect whether the USB male seat is inserted into the USB female seat, a complex circuit structure is generally used, so that the detection cost is higher.

Disclosure of Invention

The embodiment of the application provides an insertion detection circuit, a USB female seat and electronic equipment, which can simplify the insertion detection circuit and further reduce the detection cost.

In a first aspect, an embodiment of the present application provides an insertion detection circuit, connected to a USB female socket, where the USB female socket is configured to plug in with the USB male socket to implement electrical connection between the USB male socket and the USB female socket, the USB female socket includes a metal shell and a detection terminal that are spaced apart from each other, the insertion detection circuit includes a level providing circuit and a grounding circuit, and the level providing circuit is connected to one of the metal shell and the detection terminal and is configured to provide a level signal; the grounding circuit is connected with the other one of the metal shell and the detection terminal and is used for grounding; when the USB male seat is inserted into the USB female seat, the metal shell and the detection terminal are not conducted due to mutual interval, the detection terminal outputs a first level signal to the controller, and when the USB male seat is inserted into the USB female seat, the USB male seat conducts the metal shell with the detection terminal, and the detection terminal outputs a second level signal different from the first level signal.

Based on the above embodiment, by additionally designing the detection terminal on the USB female socket and connecting the level providing circuit with one of the metal shell and the detection terminal, connecting the ground circuit with the other of the metal shell and the detection terminal, when the USB female socket is not inserted into the USB female socket, the metal shell and the detection terminal cannot be conducted due to mutual interval, and at this time, the detection terminal outputs the first level signal to the controller; when the USB male seat inserts the USB female seat, the shell of the USB male seat has conductivity, so that the metal shell is conducted with the detection terminal, at the moment, the level state of the detection terminal changes, the first level signal jumps to the second level signal, namely, the detection terminal outputs the second level signal different from the first level signal, therefore, whether the USB male seat is inserted into the USB female seat can be judged by detecting whether the level signal output by the detection terminal jumps or not, and therefore, the complex circuit design can be simplified, the detection cost is reduced, and compared with a complex circuit, the whole circuit is invalid due to poor stability of the complex circuit, and the insertion detection circuit of the embodiment of the application is simple in construction, is favorable for improving the stability of the insertion detection function and is convenient to overhaul.

In a second aspect, an embodiment of the present application further provides a USB female socket, including a metal shell, an insulating substrate, and a detection terminal: the metal shell is provided with an inserting cavity; the insulating substrate is arranged in the inserting cavity; the detection terminals are arranged on the insulating substrate and are arranged at intervals with the metal shell; wherein, metal casing and detection terminal all are connected with inserting detection circuit.

Based on the above embodiment, when the metal shell and the detection terminal are connected with the insertion detection circuit in the above connection manner and inserted into the USB female socket, the detection terminal and the metal shell are simultaneously connected with the metal shell of the USB male socket, so as to change the state of the level signal output by the detection terminal, that is, the level signal output by the detection terminal to the controller has a first level signal to be switched to a second level signal, and the controller can judge that the USB male socket is inserted into the USB female socket according to the jump of the level signal, thereby realizing the insertion detection of the USB male socket.

In a third aspect, an embodiment of the present application further provides an electronic device, including a housing, a controller, and a USB socket; the controller is arranged in the shell; the metal shell is connected with the shell, the detection terminal is electrically connected with the controller, and when the level detected by the controller jumps from a first level signal to a second level signal, the controller judges that the USB male seat is inserted into the USB female seat.

Based on the above embodiment, when the level detected by the controller jumps from the first level signal to the second level signal, the controller determines that the USB male socket is inserted into the USB female socket.

Based on the insertion detection circuit, the insertion detection circuit is connected with a USB female seat, the USB female seat is used for being spliced by a USB male seat to realize electric connection of the USB female seat and the USB male seat, the USB female seat comprises a metal shell and a detection terminal which are mutually spaced, the insertion detection circuit comprises a level providing circuit and a grounding circuit, and the level providing circuit is connected with one of the metal shell and the detection terminal; the grounding circuit is connected with the other one of the metal shell and the detection terminal, and the output end of the grounding circuit is grounded; when the USB male seat is inserted into the USB female seat, the metal shell is connected with the detection terminal, and the detection terminal outputs a first level signal to the controller; the detection terminal is designed on the USB female seat in addition, the level providing circuit is connected with one of the metal shell and the detection terminal, the grounding circuit is connected with the other one of the metal shell and the detection terminal, when the USB female seat is not inserted into the USB female seat, the metal shell and the detection terminal cannot be conducted due to mutual interval, and at the moment, the detection terminal outputs a first level signal to the controller; when the USB male seat inserts the USB female seat, the shell of the USB male seat has conductivity, so that the metal shell is conducted with the detection terminal, at the moment, the level state of the detection terminal changes, the first level signal jumps to the second level signal, namely, the detection terminal outputs the second level signal different from the first level signal, therefore, whether the USB male seat is inserted into the USB female seat can be judged by detecting whether the level signal output by the detection terminal jumps or not, and therefore, the complex circuit design can be simplified, the detection cost is reduced, and compared with a complex circuit, the whole circuit is invalid due to poor stability of the complex circuit, and the insertion detection circuit of the embodiment of the application is simple in construction, is favorable for improving the stability of the insertion detection function and is convenient to overhaul.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a connection structure among an insertion detection circuit, a USB female socket and a controller according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating a connection structure among an insertion detection circuit, a USB female socket and a controller according to another embodiment of the present application;

FIG. 3 is a schematic diagram of a specific circuit configuration among an insertion detection circuit, a USB female socket and a controller according to an embodiment of the present application;

FIG. 4 is a schematic diagram showing a specific circuit configuration among an insertion detection circuit, a USB female socket and a controller according to another embodiment of the present application;

FIG. 5 is a schematic diagram of a USB female socket according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an electronic device in an embodiment of the present application.

Reference numerals: 1. an insertion detection circuit; 11. a level providing circuit; 111. a pull-up resistor; 12. a grounding circuit; 121. a conductor; 122. a pull-down resistor; 2. a USB female base; 21. a metal shell; 211. a plug cavity; 22. an insulating substrate; 23. a detection terminal; 24. a power supply negative terminal; 25. a data positive terminal; 26. a data negative terminal; 27. a positive terminal of the power supply; 3. an electronic device; 31. a housing; 32. a controller; 33. and a main control board.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Referring to fig. 1-2, a first aspect of the present application proposes an insertion detection circuit 1, the insertion detection circuit 1 is configured to be connected to a USB female socket 2, the USB female socket 2 is configured to be plugged into a USB male socket to enable an electrical connection between the USB male socket and the USB female socket, the USB female socket 2 includes a metal shell 21 and a detection terminal 23 that are spaced apart from each other, the detection terminal 23 is disposed in the metal shell 21, the insertion detection circuit 1 includes a level providing circuit 11 and a grounding circuit 12, the level providing circuit 11 is connected to one of the metal shell 21 and the detection terminal 23, and the level providing circuit 11 provides a level signal to the metal shell 21 or the detection terminal 23 connected thereto; the ground circuit 12 is connected to the other of the metal shell 21 and the detection terminal 23, and the ground circuit 12 is for grounding to ground the metal shell 21 or the detection terminal 23 connected thereto; when the USB male socket is not inserted into the USB female socket 2, the metal shell 21 and the detection terminal 23 are not turned on due to the mutual interval, and the level providing circuit 11 or the ground circuit 12 connected to the detection terminal 23 outputs a first level signal to the controller 32 through the detection terminal 23; when the USB male socket is inserted into the USB female socket 2, the USB male socket turns on the metal shell 21 and the detection terminal 23, so as to change the level state on the detection terminal 23, and the detection terminal 23 outputs a second level signal different from the first level signal.

The level providing circuit 11 may be connected with one of the metal case 21 and the detection terminal 23 to input a high level signal to the metal case 21 or the detection terminal 23, and in the embodiment of the present application, the level providing circuit 11 may include at least one of a resistance, a capacitance, and an inductance.

The ground circuit 12 may be connected to the other of the metal case 21 and the detection terminal 23 to input a low level signal to the metal case 21 or the detection terminal 23, and since the ground circuit 12 is grounded, the low level signal of the ground circuit 12 is actually a ground level signal. In embodiments of the present application, the ground circuit 12 may include at least one of a conductor, a resistor, a capacitor, and an inductance.

In the embodiment of the present application, by additionally designing the detection terminal 23 on the USB female socket 2 and connecting the level providing circuit 11 with one of the metal shell 21 and the detection terminal 23, the ground circuit 12 is connected with the other of the metal shell 21 and the detection terminal 23, and when the USB female socket 2 is not inserted into the USB female socket, the metal shell 21 and the detection terminal 23 cannot be turned on due to mutual interval, and at this time, the detection terminal 23 outputs the first level signal to the controller 32; when the USB male socket is inserted into the USB female socket 2, the shell of the USB male socket has conductivity, so that the metal shell 21 is conducted with the detection terminal 23, at the moment, the level state of the detection terminal 23 changes, and the detection terminal 23 jumps to a second level signal, namely, the detection terminal 23 outputs the second level signal different from the first level signal, so that whether the USB male socket is inserted into the USB female socket 2 can be judged by judging whether the level signal output by the detection terminal 23 jumps or not, thereby simplifying complex circuit design, reducing detection cost, and compared with complex circuits, part of electronic devices fail to cause the failure of the whole circuit due to poor stability of the complex circuits, the insertion detection circuit 1 in the embodiment of the application is simple in construction, is favorable for improving the stability of the insertion detection function, and is convenient to overhaul.

Referring to fig. 3, in a specific embodiment, the level providing circuit 11 includes a pull-up resistor 111, one end of the pull-up resistor 111 is used for accessing a detection voltage, and the other end of the pull-up resistor 111 is electrically connected to the detection terminal 23; the grounding circuit 12 includes a conductor 121, and the conductor 121 grounds the metal shell 21. When the USB male socket is not inserted into the USB female socket 2, the detection terminal 23 outputs a first level signal, which is a level after the detection voltage is divided by the pull-up resistor 111, to the controller 32; when the USB male socket is inserted into the USB female socket 2, the metal shell of the USB male socket conducts the metal shell 21 and the detection terminal 23, so that the detection terminal 23 is grounded, the detection terminal 23 outputs a second level signal to the controller 32, after the USB male socket is inserted into the USB female socket, the detection terminal 23 is grounded, and the second level signal output by the detection terminal 23 is also a grounded level signal, so that the first level signal is greater than the second level signal, the controller 32 detects that the level signal output by the detection terminal 23 jumps from a higher first level signal to a lower second level signal, and then the insertion of the USB male socket into the USB female socket can be judged, thereby realizing the insertion detection of the USB male socket. In a specific embodiment of the present application, the detection voltage may be 3.3v, where 3.3v is a working voltage commonly used in electronic equipment, and no additional transformer is needed, so that the detection voltage is easy to obtain; the resistance of the pull-up resistor 111 may be 10kΩ, and the resistance is moderate, so that the voltage value corresponding to the first level signal is higher, and when the level signal output by the detection terminal 23 jumps from the higher first level signal to the lower second level signal, the voltage value of the level signal changes obviously, so that the accuracy and sensitivity of the judgment of the controller 32 can be improved. In other embodiments, the magnitude of the detection voltage and the resistance value of the pull-up resistor 111 are not particularly limited, for example, the detection voltage may be greater than or equal to 3.3V and less than or equal to 5V, and the resistance value of the pull-up resistor 111 may be greater than or equal to 5.1kΩ and less than or equal to 1mΩ, so that an appropriate detection voltage and pull-up resistor 111 may be selected according to practical use requirements.

Referring to fig. 4, in another embodiment, the level providing circuit 11 includes a pull-up resistor 111, one end of the pull-up resistor 111 is used for accessing a detection voltage, and the other end of the pull-up resistor 111 is electrically connected to the metal shell 21; the grounding circuit 12 includes a pull-down resistor 122, one end of the pull-down resistor 122 is electrically connected to the detection terminal 23, and the other end of the pull-down resistor 122 is grounded. When the USB male socket is not inserted into the USB female socket, the detection terminal 23 is grounded through the pull-down resistor 122 and outputs a first level signal to the controller 32, and at this time, the first level signal is a ground level signal; when the USB male socket is inserted into the USB female socket, the metal shell of the USB male socket conducts the metal shell 21 and the detection terminal 23, the detection voltage is divided by the pull-up resistor 111 and the pull-down resistor 122, the detection terminal 23 is positioned between the pull-up resistor 111 and the pull-down resistor 122, the voltage at the detection terminal 23 is the voltage divided by the pull-down resistor, namely, the second level signal is obviously larger than the first level signal, the detection terminal 23 outputs the second level signal to the controller 32, the controller 32 detects that the output level signal jumps from the lower first level signal to the higher second level signal, so that the insertion detection of the USB male socket is realized, and the first level signal is smaller than the second level signal, so that the insertion of the USB male socket into the USB female socket can be judged. In a specific embodiment of the present application, the detection voltage is 3.3v, and 3.3v is a common working voltage in the electronic device, so that the detection voltage is easy to obtain without an additional transformer; the resistance of the pull-up resistor 111 may be 100deg.KΩ, and the resistance of the pull-down resistor 122 may be 200KΩ, so that the voltage value corresponding to the first level signal is relatively high, and when the level signal output by the detection terminal 23 jumps from the relatively high first level signal to the relatively low second level signal, the voltage value of the level signal changes significantly, so as to improve the accuracy and sensitivity of the judgment of the controller 32. In other embodiments, the detection voltage may be greater than or equal to 3.3V and less than or equal to 5V, the resistance values of the pull-up resistor 111 and the pull-down resistor 122 are all greater than or equal to 10kΩ and less than or equal to 1mΩ, and the resistance value of the pull-up resistor 111 is half of the resistance value of the pull-down resistor 122, so that there may be a significant difference between the first level signal and the second level signal, so as to be recognized by the controller 32, thereby improving the accuracy and sensitivity of the determination by the controller 32.

Referring to fig. 5, the embodiment of the present application further provides a USB socket 2, including a metal shell 21, an insulating substrate 22, and a detection terminal 23: the metal shell 21 is provided with a plug cavity 211; the insulating substrate 22 is disposed in the socket cavity 211; the detection terminal 23 is arranged on the insulating substrate 22 and is arranged at intervals from the metal shell 21; when the metal shell 21 and the detection terminal 23 are connected with the insertion detection circuit 1 in the above connection manner and the USB male socket is inserted into the USB female socket 2, the detection terminal 23 and the metal shell 21 are simultaneously connected with the metal shell of the USB male socket, so as to change the state of the level signal output by the detection terminal 23, that is, the level signal output by the detection terminal 23 to the controller 32 has the first level signal switched to the second level signal, and the controller 32 can judge that the USB male socket is inserted into the USB female socket according to the jump of the level signal, thereby realizing the insertion detection of the USB male socket.

Referring to fig. 5, in a specific embodiment, the detection terminal 23 may be at least one of a metal bump and a metal spring, and the metal bump and the metal spring may both enable the detection terminal 23 to be connected with the metal shell 21 through the metal shell of the USB socket.

Referring to fig. 5, in a specific embodiment, the USB socket 2 further includes a power negative terminal 24, a data positive terminal 25, a data negative terminal 26, and a power positive terminal 27 sequentially arranged on the insulating substrate 22 at intervals; the detection terminal 23 may be located between any two adjacent terminals of the power negative terminal 24, the data positive terminal 25, the data negative terminal 26 and the power positive terminal 27, without redesigning the main structure of the insulating substrate 22, and the detection terminal 23, the power negative terminal 24, the data positive terminal 25, the data negative terminal 26 and the power positive terminal 27 may be located at the same height, so as to improve the contact stability with the male metal shell. In yet another specific embodiment, the detection terminal 23 may be located on a side of the power negative terminal 24 facing away from the data positive terminal 25, and the detection terminal 23 may be located at a greater distance from the power negative terminal 24, so as to reduce the risk of abnormal detection caused by a short circuit between the detection terminal 23 and the power negative terminal 24 due to dirt or sewage entering the USB female socket 2. In another specific embodiment, the detection terminal 23 may also be located on a side of the power positive terminal 27 facing away from the data negative terminal 26, so that the detection terminal 23 may be located at a relatively long distance from the power positive terminal 27, so as to reduce the risk of abnormal detection caused by short circuit between the detection terminal 23 and the power positive terminal 27 due to dirt or sewage entering the USB female socket 2. In the embodiment of the application, the positional relationship between the detection terminal 23 and the power negative terminal 24, the data positive terminal 25, the data negative terminal 26 and the power positive terminal 27 is not limited, and only after the USB male socket is inserted into the USB female socket 2, the detection terminal 23 is ensured to be in contact with the metal shell of the USB male socket to realize electrical connection.

Referring to fig. 5, in a specific embodiment, the detection terminal 23, the power negative terminal 24, the data positive terminal 25, the data negative terminal 26 and the power positive terminal 27 are disposed on the same surface of the insulating substrate 22, so as to facilitate the production of the USB socket 2, and reduce the production cost; in yet another specific embodiment, the power negative terminal 24, the data positive terminal 25, the data negative terminal 26 and the power positive terminal 27 are disposed on the first surface of the insulating substrate 22, the detection terminal 23 is disposed on the second surface of the insulating substrate 22, and the second surface is disposed adjacent to the first surface, so that the risk of abnormal detection caused by short circuit between the detection terminal 23 and other terminals due to dirt or sewage entering the USB socket 2 can be reduced; in other embodiments, the first surface and the second surface can be disposed opposite to each other, so that the risk of abnormal detection caused by short circuit between the detection terminal 23 and other terminals due to dirt or sewage entering the USB socket 2 can be reduced, and in the embodiments of the present application, the surface of the insulating substrate 22 where the detection terminal 23 is located is not specifically limited.

In a third aspect, referring to fig. 1 and 6, an electronic device 3 is further provided in the embodiments of the present application, and includes a housing 31, a controller 32, and a USB socket 2; the controller 32 is disposed within the housing 31; the metal shell 21 is connected with the shell 31, the detection terminal 23 is electrically connected with the controller 32, and when the controller 32 detects that the level signal output by the detection terminal 23 jumps from the first level signal to the second level signal, the controller 32 judges that the USB male seat is inserted into the USB female seat 2; the casing 31 may be made of plastic or metal, the connection mode between the casing 31 and the metal casing 21 may be screw connection, clamping connection or gluing connection, and the electronic device 3 may be, but is not limited to, a charger or a host computer; in other embodiments, the electronic device 3 further includes a main control board 33 disposed in the housing 31, the insertion detection circuit 1 is disposed on the main control board 33 and can be electrically connected to the mother base 2 through a wire or a bonding wire, so as to electrically connect the insertion detection circuit 1 with the detection terminal 23 and the metal shell 21, and the detection terminal 23 is electrically connected to the controller 32 through a wire or a bonding wire.

Referring to fig. 6, in a specific embodiment, when the controller 32 detects that the level signal output by the detection terminal 23 jumps from the first level signal to the second level signal, the controller 32 determines that the USB male socket is inserted into the USB female socket 2, and may control the electronic device 3 to perform a first operation, for example, when the electronic device 3 is a charger, after the controller 32 determines that the USB male socket is inserted into the USB female socket 2, the charger is controlled to start charging the electric device connected to the USB male socket.

It may be appreciated that when the controller 32 detects that the level signal output by the detection terminal 23 jumps from the second level signal to the first level signal, the controller 32 determines that the USB male socket leaves the USB female socket 2, and may control the electronic device 3 to perform a second operation, for example, the electronic device 3 is a charger, and when the controller 32 determines that the USB male socket leaves the USB female socket 2, the controller 32 controls the charger to stop charging the electric device connected to the USB male socket.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. An insert detection circuit, its characterized in that is connected with the female seat of USB, the female seat of USB supplies the male seat grafting of USB in order to realize the public seat of USB with the female seat of USB between be connected electrically, the female seat of USB includes metal casing and the detection terminal of mutual spaced, insert detection circuit includes:

a level supply circuit connected to one of the metal case and the detection terminal for supplying a level signal;

a grounding circuit connected with the other of the metal shell and the detection terminal and used for grounding;

when the USB male seat is inserted into the USB female seat, the metal shell and the detection terminal are not conducted due to mutual interval, the detection terminal outputs a first level signal to the controller, when the USB male seat is inserted into the USB female seat, the USB male seat conducts the metal shell with the detection terminal, and the detection terminal outputs a second level signal different from the first level signal.

2. The insertion detection circuit of claim 1, wherein,

the level providing circuit comprises a pull-up resistor, one end of the pull-up resistor is used for being connected with a detection voltage, and the other end of the pull-up resistor is electrically connected with the detection terminal;

the grounding circuit includes a conductor that grounds the metal shell;

the first level signal is a level signal of the detection voltage divided by the pull-up resistor, and the first level signal is greater than the second level signal.

3. The insertion detection circuit according to claim 2, wherein the detection voltage is 3.3V or more and 5V or less, and the resistance value of the pull-up resistor is 5.1kΩ or more and 1mΩ or less.

4. The insertion detection circuit of claim 1, wherein,

the level providing circuit comprises a pull-up resistor, one end of the pull-up resistor is used for being connected with a detection voltage, and the other end of the pull-up resistor is electrically connected with the metal shell;

the grounding circuit comprises a pull-down resistor, one end of the pull-down resistor is electrically connected with the detection terminal, and the other end of the pull-down resistor is grounded;

the first level signal is a ground level signal of the pull-down resistor, and the first level signal is smaller than the second level signal.

5. The insertion detection circuit of claim 4, wherein the detection voltage is greater than or equal to 3.3V and less than or equal to 5V, and wherein the resistance of the pull-up resistor and the resistance of the pull-down resistor are both greater than or equal to 10kΩ and less than or equal to 1mΩ.

6. A USB female socket, comprising:

the metal shell is provided with an inserting cavity;

the insulating substrate is arranged in the plug-in cavity;

the detection terminal is arranged on the insulating substrate and is arranged at intervals with the metal shell;

wherein the metal shell and the detection terminal are connected to the insertion detection circuit as claimed in any one of claims 1 to 5.

7. The USB female receptacle of claim 6, further comprising a power negative terminal, a data positive terminal, a data negative terminal, and a power positive terminal sequentially arranged at intervals on the insulating substrate;

the detection terminal is located between any two adjacent terminals in the power negative electrode terminal, the data positive electrode terminal, the data negative electrode terminal and the power positive electrode terminal, or is located at one side of the power negative electrode terminal, which is away from the data positive electrode terminal, or is located at one side of the power positive electrode terminal, which is away from the data negative electrode terminal.

8. The USB socket of claim 6, wherein the detection terminal is at least one of a metal bump and a metal spring.

9. The USB socket of claim 7, wherein the detection terminal is disposed on the same surface of the insulating substrate as the power negative terminal, the data positive terminal, the data negative terminal, and the power positive terminal, or

The power supply negative electrode terminal, the data positive electrode terminal, the data negative electrode terminal and the power supply positive electrode terminal are arranged on the first surface of the insulating substrate, the detection terminal is arranged on the second surface of the insulating substrate, and the second surface is adjacent to or opposite to the first surface.

10. An electronic device, comprising:

a housing;

the controller is arranged in the shell;

the USB female socket of any one of claims 6-9, wherein the metal shell is connected to the housing, the detection terminal is electrically connected to the controller, and the controller determines that the USB male socket is inserted into the USB female socket when a level detected by the controller jumps from the first level signal to the second level signal.