CN103956619B - A kind of safety plug with switch - Google Patents

Abstract

The invention provides a kind of safety plug with switch; including the conductive plug for butt-joint socket, for connecting the binding post of power line, for fixing described conductive plug and the insulation shell of described binding post and for the electric on and off switch of break-make plug inside, it is characterised in that: be provided with between described conductive plug and described binding post for under-voltage and short-circuit time disconnecting circuit safety guard.The present invention provides a kind of safety plug with switch that can protect electrical equipment with switch in voltage instability timing automatic trip.

Description

A safety plug with a switch

technical field

The invention relates to the field of plug sockets, in particular to a safety plug with a switch.

Background technique

Generally, the plugs of household appliances or other electrical equipment do not have switches. When the plugs are powered on when the electrical appliances are not in use, the energy-consuming devices inside the electrical appliances will still be at the static operating point, which will waste electricity and is not very safe.

Another example is a utility model patent application with the application publication number CN 102044807 A, which discloses a plug with a switch. It includes a plug seat and a terminal on the plug seat. A switch device is installed on the end of the plug seat away from the end. The power line is connected to the switch device and then connected to the terminal. connect. When the electric appliance is used up, there is no need to unplug the plug holder, because there is a rotatable switch at the rear end of the plug holder, which is in the open state when it is parallel to the plug holder, and is in the disconnected state when it is vertical. Though this utility model can play the effect of cutting off the circuit, still there is safety problem in this direct plug when running into unstable voltage.

Contents of the invention

The invention provides a safety plug with a switch which can automatically trip to protect electrical equipment when the voltage is unstable.

In order to achieve the above object, the present invention adopts the following technical solutions: a safety plug with a switch, including a conductive plug for docking with a socket, a terminal for connecting a power line, a terminal for fixing the conductive plug and the wiring The insulating shell of the post and the power switch for switching on and off the internal electricity of the plug are characterized in that a safety protection device for disconnecting the circuit in case of undervoltage and short circuit is provided between the conductive plug and the terminal post .

As a preference, the safety protection device includes a protection switch for closing and breaking the circuit, an on-off hook for controlling the on-off of the protection switch, and a short circuit for controlling the action of the on-off hook. Undervoltage action device; the protection switch is set between the extension wire of the conductive plug and the extension wire of the terminal post, the on-off lock hook is connected with the protection switch hasp, and the short circuit The undervoltage action device is arranged on one side of the on-off lock hook.

As a preference, the end of the protection switch is provided with a contact switch for closing the protection switch, the contact switch exposes the insulating shell, and the end of the protection switch is also provided with a contact switch for pulling The tension spring of the protection switch is opened, and the tension spring is fixedly connected with the insulating housing.

As a preference, the short-circuit and undervoltage action device includes a short-circuit jack block for lifting the on-off lock hook to disconnect the protection switch during short-circuit, and a short-circuit jack block for jacking up the on-off lock hook during undervoltage. Hook the undervoltage jacking block that disconnects the protection switch, the pull-back spring for back and forth the short-circuit jacking block, the pull-up spring for pulling up the under-voltage jacking block, the working suction and the The short-circuit armature of the short-circuit top block and the undervoltage armature used to stop working and release the short-circuit top block when undervoltage; the short-circuit top block and the under-voltage top block are rotatably arranged inside the insulating shell, One end of the short-circuit top block is provided with the pull-back spring, the other end is provided with the short-circuit armature, one end of the undervoltage top block is provided with the pull-up spring, and the other end is provided with the undervoltage armature.

As a preference, the on-off hook is rotatably connected to the insulating housing.

As a preference, the short-circuit armature is arranged in series between the protection switch and the terminal.

As a preference, the undervoltage armature is arranged in parallel between the protection switch and the conductive plug.

As a preference, the power switch is arranged in series between the protection switch and the terminal.

As a preference, the power switch is a self-locking switch.

As a preference, the wall thickness of the insulating housing is 2mm~3mm.

In summary, the present invention has the following advantages:

1. In the present invention, a safety protection device for disconnecting the circuit during undervoltage and short circuit is provided between the conductive plug and the terminal post. In this way, it can play a protective role when the circuit is unstable, and even if a dangerous overcurrent phenomenon occurs when the power switch is pressed, the circuit will be automatically disconnected to play a protective role.

2. In the present invention, the wall thickness of the insulating shell is preferably 2mm~3mm. Such a thick insulating wall can effectively prevent the voltage fluctuation of 198V~298V from penetrating through the insulating shell of the plug and causing harm to the human body.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

The numbers in the figure are as follows:

1-conductive plug, 2-terminal, 3-insulation shell, 4-power switch, 5-safety protection device, 51-protection switch, 52-on-off lock hook, 53-short circuit and undervoltage action device, 511-contact Point switch, 512-tension spring, 531-short-circuit top block, 532-undervoltage top block, 533-pull-back spring, 534-pull-up spring, 535-short-circuit armature, 536-undervoltage armature.

detailed description

The present invention will be further described below with reference to the accompanying drawings.

As shown in Figure 1, the embodiment of the present invention includes a conductive plug 1 for docking with a socket, a terminal 2 for connecting a power cord, an insulating housing 3 for fixing the conductive plug 1 and the terminal 2, and an on-off The electrical power switch 4 inside the plug is provided with a safety protection device 5 for disconnecting the circuit during undervoltage and short circuit between the conductive plug 1 and the terminal post 2 . The power switch 4 is arranged in series between the protection switch 51 and the terminal 2 . The power switch 4 is a self-locking switch. The wall thickness of the insulating case 3 is 3 mm.

As shown in Figure 1, the safety protection device 5 in this embodiment includes a protection switch 51 for closing and breaking the circuit, an on-off hook 52 for controlling the on-off of the protection switch 51, and an on-off hook for controlling the on-off. The short-circuit and undervoltage operating device 53 operated by 52, the on-off lock hook 52 is rotatably connected with the insulating housing 3 . The protection switch 51 is set between the extension wire of the conductive plug 1 and the extension wire of the terminal 2, the on-off lock hook 52 is snap-connected with the protection switch 51, and the short-circuit and undervoltage action device 53 is arranged on one side of the on-off lock hook 52 .

As shown in Figure 1, the end of the protection switch 51 is provided with a contact switch 511 for closing the protection switch 51, the contact switch 511 exposes the insulating casing 3, and the end of the protection switch 51 is also provided with a pull for pulling the protection switch 51 The spring 512 is tightened, and the tension spring 512 is fixedly connected with the insulating housing 3 . The short-circuit and undervoltage operating device 53 includes a short-circuit top block 531 for jacking up the on-off latch hook 52 to disconnect the protection switch 51 during a short circuit, and a short-circuit jack block 531 for jacking up the on-off latch hook 52 to disconnect the protection switch 51 when undervoltage. Press jacking piece 532, be used for back and forth short-circuit jacking piece 531 pull-back spring 533, be used to pull up the pull-up spring 534 of underpressure jacking piece 532, be used for the short-circuiting armature 535 of working suction and short-circuit jacking piece 531 when short circuit and be used for When undervoltage, stop working and release the undervoltage armature 536 of the short-circuit top block 532; the short-circuit top block 531 and the under-voltage top block 532 are rotatably arranged inside the insulating housing 3, and one end of the short-circuit top block 531 is provided with a pull-back spring 533, and the other end A short-circuit armature 535 is provided, a pull-up spring 534 is provided at one end of the undervoltage jacking block 532 , and an undervoltage armature 536 is provided at the other end. The short-circuit armature 535 is arranged in series between the protection switch 51 and the terminal 2 . The undervoltage armature 536 is arranged in parallel between the protection switch 51 and the conductive plug 1 .

When the embodiment of the present invention is in use, it is only necessary to connect the power line of the electrical equipment to the terminal 2 . During use, it is only necessary to press the power switch 4 to close the circuit.

After the power switch 4 of the embodiment of the present invention is closed, if the circuit is short-circuited, the voltage of the short-circuit armature 535 will drop below the operating voltage, and at this time, the suction and force of the short-circuit armature 535 to the undervoltage top block 532 rises to the pulling force of the return spring 533 Above, at this moment, the short-circuit top block 531 will jack up the on-off lock hook 52, and after the clearance hook lock 52 is jacked up, the protection switch 51 is released, and the protection switch is disconnected from the circuit, which plays the role of protecting the electrical equipment; If there is an undervoltage, the voltage of the undervoltage armature 536 will drop below the operating voltage. At this time, the suction and force of the undervoltage armature 536 on the undervoltage jacking block 532 will drop below the pulling force of the pull-up spring 534. At this time, the pull-up spring 534 pulls up the undervoltage jacking block 532, and the undervoltage jacking block 532 will jack up the on-off lock hook 52 like this. After the customs clearance hook lock 52 is jacked up, the protection switch 51 is released, and the protection switch is disconnected from the circuit, which plays a role in protecting the power supply The role of the device.

The above description is only an explanation of the present invention, so that those of ordinary skill in the art can implement the scheme completely, but it is not a limitation of the present invention. Those skilled in the art can make non-inventive changes to this embodiment as needed after reading this description. Contributed modifications, these are non-inventive modifications. But as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims (9)

1. the safety plug with switch; including the conductive plug (1) for butt-joint socket, for connecting the binding post (2) of power line, being used for fixing the insulation shell (3) of described conductive plug (1) and described binding post (2) and be used for the electric on and off switch (4) of break-make plug inside, it is characterised in that: be provided with between described conductive plug (1) and described binding post (2) for under-voltage and short-circuit time disconnecting circuit safety guard (5)；Described safety guard (5) includes for closing, the protection of disconnecting circuit switchs (51), is used for controlling the break-make latch hook (52) of described protection switch (51) break-make and being used for controlling the short-circuit low-voltage device (53) of described break-make latch hook (52) action；What described protection switch (51) was arranged on the extension wire of described conductive plug (1) and described binding post (2) prolongs between raw wire; described break-make latch hook (52) is connected with described protection switch (51) hasp, and described short-circuit low-voltage device (53) is arranged on the side of described break-make latch hook (52).

A kind of safety plug with switch the most according to claim 1; it is characterized in that: the end of described protection switch (51) is provided with the contact switch (511) for closing described protection switch (51); described contact switch (511) exposes described insulation shell (3); the end of described protection switch (51) is additionally provided with the back-moving spring (512) for pulling open described protection switch (51), and described back-moving spring (512) is fixing with described insulation shell (3) to be connected.

A kind of safety plug with switch the most according to claim 1, it is characterized in that: described short-circuit low-voltage device (53) includes that break-make latch hook (52) described in jack-up makes the short-circuit jacking block (531) that described protection switch (51) disconnects when short circuit, when under-voltage, break-make latch hook (52) described in jack-up makes the under-voltage jacking block (532) that described protection switch (51) disconnects, Return spring (533) for the most described short circuit jacking block (531), pull-up spring (534) for jacking block (532) under-voltage described in pull-up, the short-circuit armature (535) with described short circuit jacking block (531) and the under-voltage armature (536) for the release described short circuit jacking block (532) that quits work when under-voltage is inhaled for the work when short circuit；Described short-circuit jacking block (531) and described under-voltage jacking block (532) rotate and are arranged on described insulation shell (3) inner side, one end of described short-circuit jacking block (531) is provided with described Return spring (533), the other end is provided with described short-circuit armature (535), one end of described under-voltage jacking block (532) is provided with described pull-up spring (534), and the other end is provided with described under-voltage armature (536).

A kind of safety plug with switch the most according to claim 1, it is characterised in that: described break-make latch hook (52) is rotationally connected with described insulation shell (3).

A kind of safety plug with switch the most according to claim 3, it is characterised in that: described short-circuit armature (535) is arranged in series between described protection switch (51) and described binding post (2).

A kind of safety plug with switch the most according to claim 3, it is characterised in that: described under-voltage armature (536) is arranged in parallel between described protection switch (51) and described conductive plug (1).

A kind of safety plug with switch the most according to claim 1, it is characterised in that: described on and off switch (4) is arranged in series between described protection switch (51) and described binding post (2).

A kind of safety plug with switch the most according to claim 1, it is characterised in that: described on and off switch (4) is self-lock switch.

A kind of safety plug with switch the most according to claim 1, it is characterised in that: the wall thickness of described insulation shell (3) is 2mm ~ 3mm.