Safety type extension line socket

Abstract

The utility model discloses a safety-type extension cord socket, which relates to the technical field of sockets and comprises a socket shell and a touch switch control circuit, a switch control area is formed on the socket shell, a shell seal is formed at the switch control area of the socket shell, and the touch switch control circuit is arranged on the switch control area. An outer switch control area located outside the socket shell and an inner switch control area located in the socket shell are formed; the touch switch control circuit comprises a detection sampling induction control spring S1 and a PCB which are arranged in the switch control inner area, a control chip U5 is arranged on the PCB, and the control chip U5 obtains charge changes on the detection sampling induction control spring through an input pin so as to be used for detecting the approaching trigger action of an external user. The socket can automatically identify the control action of a user and form a shell seal by the socket shell, and compared with a traditional mechanical switch, the socket has the advantages that the risks of electric leakage, electric shock and the like do not exist, and the use of the user is safer.

Description

TECHNICAL FIELD

[0001] The utility model relates to socket technical field especially relates to a safe extension cord socket. BACKGROUND

[0002] The control switch structure of the extension cord socket on the market at present is many, such as the Chinese utility model "three edge upright socket" of announcement number CN210838229U, the button is embedded and fixed on the upper cover, the button can open and close three sockets and four USB outputs.Or such as the Chinese utility model "magic cube socket with heat insulation structure between strong and weak electricity" of announcement number CN219180883U, the USB interface and the power switch are all arranged on the shell cover, and the switch control circuit is electrically connected with the power switch.Both adopt mechanical switch control, and the mechanical switch has structure gap, and it is easy to cause user electric shock and other dangers due to reasons such as dampness and water leakage. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a technical scheme capable of solving the above problems to overcome the above-mentioned deficiencies.

[0004] To achieve the above object, the utility model provides the following technical scheme: a safe extension cord socket, comprising a socket shell and a touch switch control circuit; a switch control area is formed on the socket shell, and the socket shell forms a shell partition at the switch control area to form a switch control outer area located outside the socket shell and a switch control inner area located inside the socket shell; the touch switch control circuit comprises a detection sampling sensing control spring S1 and a PCB board arranged in the switch control inner area, and a control chip U5 is arranged on the PCB board; the control chip U5 obtains the charge change on the detection sampling sensing control spring through an input pin to detect the approaching trigger action of an external user, and outputs a corresponding level at an output pin as a switch control signal.

[0005] As a further scheme of the utility model: it further comprises an external power input connector, an output circuit and a relay control circuit; the control signal input end of the relay control circuit receives the switch control signal output by the touch switch control circuit; and the relay control circuit controls the communication / disconnection between the external power input connector and the input end of the output circuit according to the switch control signal.

[0006] As a further scheme of the utility model: it further comprises an auxiliary power supply circuit; the auxiliary power supply circuit is located between the external power input connector and the power supply end of the touch switch control circuit; and the auxiliary power supply circuit rectifies and / or converts the voltage of the current input by the external power input connector to supply the touch switch control circuit at the rear end.

[0007] As a further scheme of the utility model: the auxiliary power supply circuit includes fuse F1, rectifier diode D7, thermistor NTC1, electrolytic capacitor C20, electrolytic capacitor C21, differential mode inductor L2, control chip U6, output filter inductor L3, output filter capacitor C24;When the current connected by the external power input connector is alternating current, the auxiliary power supply circuit is configured to rectify the alternating current input, and convert the alternating current input into 5V direct current constant voltage through the control chip U6, and output from the Vout pin of the control chip to supply the touch switch control circuit at the rear end.

[0008] As a further scheme of the utility model: the relay control circuit includes relay K1, discharge diode D6, patch field effect transistor Q4, Q18, and light emitting diode LED1;The relay control circuit receives the switch control signal output by the touch switch control circuit, and performs corresponding switch operation on the relay K1 and synchronously controls the light emission and shutdown of the light emitting diode LED1.

[0009] As a further scheme of the utility model: the light emitting diode LED1 is located in the socket shell and emits light towards the switch control inner area;The part of the socket shell sealed at the switch control area is a light-transmitting shell.

[0010] As a further scheme of the utility model: the touch switch control circuit further includes input filter capacitor C19, control resistor R36, RC filter R35 and C18, and includes control output level voltage dividing resistor R33 and R39A;After the control chip U5 obtains the charge change of the detection sampling sensing control spring S1, the corresponding level is output as a switch control signal at the output pin OUT after detection control by the control chip U5.

[0011] Compared with the prior art, the utility model has the advantages that: when the user needs to control the power-on switch, the user can correspondingly approach the switch control outer area with fingers, the detection sampling sensing control spring S1 detects the approach of the human body, the charge on the detection sampling sensing control spring changes correspondingly, and then the control chip generates a corresponding switch control signal according to the charge change of the detection sampling sensing control spring;If the user's fingers approach the corresponding point pressing mark position on the switch control outer area of the socket shell;

[0012] Without directly contacting the touch switch control circuit, especially without directly contacting the detection sampling sensing control spring S1, the user's control action can be automatically recognized, and the socket shell forms a shell seal, so that, compared with the traditional mechanical switch, there is no risk of electric leakage and electric shock, and the user uses more safely.

[0013] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a structural stereogram of the utility model;

[0016] Figure 2 It is a structural sectional view of the utility model;

[0017] Figure 3 It is a circuit block diagram of the utility model;

[0018] Figure 4 It is a circuit principle diagram of the utility model;

[0019] Figure 5 It is a structural schematic diagram of some types of detection sampling induction control springs listed in the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1-5 A safety extension cord socket includes a socket housing 1 and a touch switch control circuit 2.

[0022] A switch control area is formed on the socket housing 1 , and the socket housing 1 forms a shell enclosure at the switch control area to form a switch control outer area 3 located outside the socket housing 1 and a switch control inner area 4 located inside the socket housing 1 .

[0023] In some embodiments, the socket housing 1 is made of insulating material, such as PP material, PE material, PET material, ABS material or other insulating materials.

[0024] The touch switch control circuit 2 comprises the detection sampling sensing control spring S1 arranged in the switch control inner area 4 and the PCB 5, and the control chip U5 is arranged on the PCB 5. The control chip U5 obtains the charge change on the detection sampling sensing control spring S1 through the input pin to detect the approaching trigger action of the external user, and outputs the corresponding level at the output pin as the switch control signal.

[0025] When the user needs to control the power-on switch, the user can correspondingly approach the finger to the switch control outer area 3, the detection sampling sensing control spring S1 detects the approach of the human body, the charge on the detection sampling sensing control spring changes correspondingly, and then the control chip U5 generates the corresponding switch control signal according to the charge change of the detection sampling sensing control spring; for example, the user approaches the finger to the corresponding point pressing mark position on the switch control outer area of the socket shell.

[0026] In the case that the user does not need to directly contact the touch switch control circuit, especially does not need to directly contact the detection sampling sensing control spring S1, the approaching control action of the user can be automatically recognized, and the shell isolation is formed by the socket shell 1. Compared with the traditional mechanical switch, there is no risk of electric shock and electric shock, and the user uses more safely.

[0027] The point pressing mark is, for example, a silk printing key mark, a laser spraying key mark, etc.

[0028] As shown in Figure 5 The detection sampling sensing control spring S1 can be any one of the types of a-g, and the same is that one end of each type of sensing control spring in the figure has a metal structure represented as an electrically connected pin. The electrically connected pin can be inserted into the corresponding electrically connected jack on the PCB or electrically connected in other ways in the touch switch control circuit.

[0029] In some embodiments, the touch switch control circuit 2 further comprises an input filter capacitor C19, a control resistor R36, an RC filter R35 and C18, and comprises a control output level voltage dividing resistor R33 and R39A; after the control chip U5 obtains the charge change of the detection sampling sensing control spring S1, the corresponding level is output at the output pin OUT as the switch control signal after the delay detection control of the control chip U5.

[0030] In this embodiment, the safety extension cord socket further comprises an external power input connector 6, an output circuit 7 and a relay control circuit 8. The control signal input end of the relay control circuit 8 receives the switch control signal output by the touch switch control circuit 2, and the relay control circuit 8 controls the communication / disconnection between the external power input connector 6 and the input end of the output circuit 7 according to the switch control signal. The output circuit 7 has at least a plug suitable for plugging into the electrical equipment.

[0031] In some embodiments, the relay control circuit 8 comprises a relay K1, a discharge diode D6, patch field effect tubes Q4, Q18, a light emitting diode LED1; the relay control circuit receives the switch control signal output by the touch switch control circuit, and performs corresponding switching operation on the relay K1 and synchronously controls the light emission and shutdown of the light emitting diode LED1, so that the user can know the control condition in time.

[0032] Preferably, the light emitting diode LED1 is located in the socket shell 1 and emits light towards the switch control inner area 4; the part of the socket shell 1 sealed at the switch control area is a light-transmitting shell.

[0033] In the embodiment, an auxiliary power supply circuit 9 is further included, which is located between the external power input terminal 6 and the power supply end of the touch switch control circuit 2, and rectifies and / or converts the voltage of the current input by the external power input terminal 6 to supply the touch switch control circuit 2 at the rear end.

[0034] In some embodiments, the auxiliary power supply circuit 9 comprises a fuse F1, a rectifier diode D7, a thermistor NTC1, electrolytic capacitors C20, C21, a differential mode inductor L2, a control chip U6, an output filter inductor L3, and an output filter capacitor C24; when the current input by the external power input terminal is alternating current, the auxiliary power supply circuit is configured to rectify the alternating current input, and convert it into a 5V direct current constant voltage through the control chip U6, and then output it from the Vout pin of the control chip, so as to supply the touch switch control circuit at the rear end.

[0035] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A safety extension cord socket, characterized in that: include A socket housing is formed with a switch control area on the socket housing, wherein the socket housing forms a housing seal at the switch control area to form a switch control outer area located outside the socket housing and a switch control inner area located inside the socket housing; The touch switch control circuit includes a detection sampling induction control spring S1 and a PCB board set in the switch control area. The PCB board is provided with a control chip U5. The control chip U5 obtains the charge change on the detection sampling induction control spring through the input pin to detect the approach trigger action of the external user, and outputs the corresponding level at the output pin as the switch control signal.

2. The safety extension cord socket according to claim 1, characterized in that: Also includes External power input connector, Output circuit, The relay control circuit receives a switch control signal output by the touch switch control circuit at its control signal input terminal, and controls the connection / disconnection between the external power input connector and the input terminal of the output circuit according to the switch control signal.

3. The safety extension cord socket according to claim 2, characterized in that: Also includes The auxiliary power supply circuit is located between the external power input connector and the power supply end of the touch switch control circuit. The auxiliary power supply circuit rectifies and / or converts the current input from the external power input connector to supply the touch switch control circuit at the back end.

4. The safety extension cord socket according to claim 3, characterized in that: The auxiliary power supply circuit includes fuse F1, rectifier diode D7, thermistor NTC1, electrolytic capacitor C20, electrolytic capacitor C21, differential mode inductor L2, control chip U6, output filter inductor L3, and output filter capacitor C24.

5. The safety extension cord socket according to any one of claims 2 to 4, characterized in that: The relay control circuit includes relay K1, discharge diode D6, SMD field effect tubes Q4 and Q18, and light emitting diode LED1.

6. The safety extension cord socket according to claim 5, characterized in that: The light emitting diode LED1 is located in the socket housing and emits light toward the switch control inner area; The portion of the socket housing that is sealed at the switch control area is a light-transmitting shell.

7. The safety extension cord socket according to claim 1 or 2 or 3 or 4 or 6, characterized in that: The touch switch control circuit also includes an input filter capacitor C19, a control resistor R36, RC filters R35 and C18, and output level control voltage divider resistors R33 and R39A.

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