WO2016045200A1

WO2016045200A1 - Surge suppression and electric spark elimination structure of power connection device

Info

Publication number: WO2016045200A1
Application number: PCT/CN2014/093593
Authority: WO
Inventors: 蒋胜泉; 袁利
Original assignee: 蒋胜泉; 袁利
Priority date: 2014-09-26
Filing date: 2014-12-11
Publication date: 2016-03-31
Also published as: CN104283202B; CN104283202A

Abstract

Provided are a surge suppression and electric spark elimination structure of a power connection device. Disposed between an input end (A) and an output end (B) of a power connection device (10) are a first electrical contact (12), a second electrical contact (13), a conductive movable switch arm at a disconnect point (20), and at least one RC circuit (30). When the power supply is turned on, the movable switch arm moves from the disconnect point (11) into electrical contact with the first electrical contact, and simultaneously allows the circuit of the power connection device to conduct, and suppresses via an RC circuit a surge generated when a power supply is turned on; the movable switch arm moves to the second electrical contact after a time delay, and simultaneously electrically contacts the first electrical contact and the second electrical contact; when the power supply is turned off, the movable switch arm moves from the second electrical contact to the first electrical contact, and eliminates via the RC circuit an electric spark generated when the power supply is turned off, then the movable switch arm moves to the disconnect point after a time delay, and breaks the connection between the power connection device and the power supply. The structure not only effectively suppresses and eliminates the surge generated when the power supply is turned on and the electric spark generated when the power supply is turned off, but also has a simple structure, low manufacturing cost, and wide scope of application.

Description

Surge suppression and spark elimination structure of power connection device

[Technical Field]

The present invention relates to a power connection device for electronic and electrical equipment, and more particularly to a power surge suppression and spark cancellation structure for a power connection device capable of suppressing generation of a surge when the power is turned on and eliminating sparking when the power is turned off. .

【Background technique】

In electronic and electrical products, various power connection devices for connecting electrical equipment and power sources, such as power converters, power switches, and power outlets, are widely used. When using such a device, a relatively large surge current is often generated at the moment of power-on, so-called surge, which is one of the important reasons for the burning of many electrical products, such as incandescent lamps. To this end, surge suppressors have been developed to solve the above problems. The existing surge suppressor is not only complicated in structure but also high in cost, and cannot be widely applied. In addition, when the power is turned off by the power switch, a reverse high voltage is generated due to the inductive load on the circuit, causing an electric spark to be generated between the switch contacts, and the electric spark will burn the contacts and bring to the grid. interference.

[Summary of the Invention]

The present invention aims to solve the above problems, and provides a surge suppression of a power connection device capable of effectively suppressing a surge at the time of power-on and eliminating sparks when the power is turned off, and having a simple structure, low cost, and wide application range. And spark elimination structure.

To achieve the above object, the present invention provides a surge suppression and spark cancellation structure for a power connection device, characterized in that a first electrical contact and a second electrical contact are provided between an input end and an output end of the power connection device. And a disconnection point, and a conductive movable switch arm and at least one RC circuit connected to the power source are disposed between the input end and the output end of the power connection device, and the active switch arm is disconnected from the power point when the power is turned on Start moving and first make electrical contact with the first electrical contact, while conducting The power connection device circuit including the RC circuit suppresses the surge when the power is turned on by the RC circuit; the movable switch arm moves to the second electrical contact after the delay, and simultaneously with the first electrical contact and the second electrical Contact electrical contact; when the power is turned off, the movable switch arm is moved from the second electrical contact to the first electrical contact, and the RC circuit eliminates the spark when the power is turned off by absorbing the reverse electromotive force generated by the load. The movable switch arm is moved to a disconnection point after a delay to disconnect the power connection device from the power source.

The power connection device is a power socket, and includes a first conductive sheet, a second conductive sheet disposed offset from the first conductive sheet, and a movable switch arm contacting or disengaging the first conductive sheet and the second conductive sheet and connected to the first conductive At least one RC circuit between the sheet and the second conductive sheet.

The power connection device is a power switch, and includes a first conductive sheet, a second conductive sheet disposed offset from the first conductive sheet, and a movable switch arm contacting or disengaging the first conductive sheet and the second conductive sheet and connected to the first conductive At least one RC circuit between the sheet and the second conductive sheet, the contact end of the movable switch arm and the first conductive sheet and the second conductive sheet is provided with a curved connecting piece, which is in accordance with the moving sequence of the movable switching arm and the first The conductive sheet and the second conductive sheet contact or disengage.

The power connection device is a push button switch, which comprises a button, a curved conductive elastic piece, an insulating plate and at least one RC circuit. The conductive elastic piece is fixed at one end to the insulating plate and connected to the power source, and the conductive elastic piece is provided with a first An electrical contact and a second electrical contact, wherein the insulating plate is provided with a first stationary contact and a second stationary contact respectively in electrical contact with the first electrical contact and the second electrical contact, the first stationary contact and the second The static contacts are respectively electrically connected to the RC circuit. When the button is pressed, the first electrical contact of the conductive elastic piece is in electrical contact with the first static contact, and the power connection device circuit including the RC circuit is turned on. The RC circuit suppresses the surge when the power is turned on; the conductive elastic piece moves to the second static contact after the delay, and when the conductive elastic piece is released, it is reset by the elastic force, and the power is eliminated by the RC circuit. EDM when disconnected.

The movable switch arm is a power plug, one end of which is connected to the power line, and the other end is a contact end.

The break point is a point at which the active switch arm is disengaged from the power connection.

The first conductive sheet and the second conductive sheet are misaligned along the moving direction of the movable switch arm, so that the movable switch arm respectively contacts the first conductive sheet, the second conductive sheet or the second conductive sheet, and the first conductive sheet, in sequence. One end of the first conductive sheet is a free end, and the other end is connected to a resistor R of the RC circuit. One end of the second conductive sheet is a free end, and the other end is connected to a capacitor C of the RC circuit.

The RC circuit is formed by connecting the resistor R and the capacitor C in series. The two ends of the resistor R are respectively connected to the first conductive sheet and the capacitor C, and the other end of the capacitor C is connected to the second conductive sheet.

The present invention contributes to the problem of effectively suppressing and eliminating the problem that the power connection device generates a surge at the moment of power-on and the electric spark is easily generated when the power is turned off with the simplest structure and low cost. The invention provides an RC circuit and three connection points between the input end and the output end of the power connection device, thereby not only effectively suppressing the surge when the power connection device is turned on, but also suppressing the spark at the time of disconnection. The structure of the invention has the characteristics of simple technology, low cost and wide application range.

[Description of the Drawings]

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram of a power socket circuit of an active switch arm of an embodiment 1 of the present invention at an off point.

2 is a schematic diagram of a power socket circuit of the movable switch arm of the first embodiment of the present invention at a first electrical contact.

3 is a schematic diagram of a power socket circuit of the movable switch arm of the first embodiment of the present invention at a second electrical contact.

4 is a schematic view showing the structure of a power switch in which the movable switch arm of the embodiment 2 of the present invention is at an off point.

Fig. 5 is a schematic view showing the structure of a power switch of the movable switch arm of the second embodiment of the present invention at a first electrical contact;

6 is a power switch junction of the movable switch arm of the second embodiment of the present invention at a second electrical contact; Schematic diagram.

Fig. 7 is a schematic view showing the structure of a push button switch in which the conductive elastic piece of the embodiment 3 of the present invention is at an opening point.

Fig. 8 is a schematic view showing the structure of a push button switch of the conductive elastic piece of the third embodiment of the present invention at a first electrical contact;

9 is a schematic view showing the structure of a push button switch of the conductive elastic piece of the third embodiment of the present invention at a second electrical contact.

【detailed description】

The following examples are intended to further illustrate and explain the present invention and are not to be construed as limiting.

Referring to FIGS. 1-9, the surge suppression and spark cancellation structure of the power connection device of the present invention includes a power connection device 10, an active switch arm 20, and an RC circuit 30, and the power connection device 10 can be a power outlet. It can be a power switch or a push button switch. A first electrical contact 121, a second electrical contact 131, and an open point 11 are disposed between the input terminal A and the output terminal B of the power connection device 10, and between the input terminal A and the output terminal B of the power connection device 10 An electrically conductive movable switch arm 20 connected to the power source and at least one RC circuit 30 are provided. When the power is turned on, the movable switch arm 20 starts to move from the breaking point 11 and is first in electrical contact with the first electrical contact 121. Turning on the power connection device circuit including the RC circuit 30, suppressing the surge when the power is turned on by the RC circuit 30; the active switch arm 20 is moved to the second electrical contact 131 after the delay, and simultaneously with the first The electrical contact 121 and the second electrical contact 131 are in electrical contact; when the power is turned off, the movable switch arm 20 is moved by the second electrical contact 131 to the first electrical contact 121, and the reverse generated by the RC circuit 30 is absorbed by the load. The electric spark at the time when the power is turned off is eliminated to the electromotive force, and the movable switch arm 20 is moved to the breaking point 11 after being delayed, so that the power connection device 10 is disconnected from the power source. The invention will now be described in greater detail with reference to the drawings and embodiments.

Example 1

In this embodiment, the power connection device 10 is a power socket. The power socket 10 includes a first conductive sheet 12, a second conductive sheet 13, a movable switch arm 20, and an RC circuit 30.

As shown in FIG. 1 to FIG. 3, the power socket 10 has a power input terminal A and a power output terminal B. The power input terminal A is connected to an external power source, and the power output terminal B is connected to the load. A first electrical contact 121, a second electrical contact 131, and an open point 11 are disposed between the input terminal A and the output terminal B of the power socket 10. In this embodiment, the first electrical contact 121 is formed by the first conductive sheet 12, and the second electrical contact 131 is formed by the second conductive sheet 13. As shown in FIG. 4 to FIG. 6 , the first conductive sheet 12 and the second conductive sheet 13 are conductive copper sheets. One end of the first conductive sheet 12 is a free end, and the other end is connected to the resistor R of the RC circuit 30. One end of the second conductive sheet 13 is a free end, and the other end is connected to a capacitor C of the RC circuit 30. The first conductive sheet 12 and the second conductive sheet 13 are dislocated along the moving direction of the movable switch arm 20, so that the movable switch arm 20 contacts the first conductive sheet 12 and the second in sequence, respectively, when the power is turned on. The conductive sheet 13 is moved by the second conductive sheet 13 to the break point 11 via the first conductive sheet 12 when the power is turned off. The break point 11 is a virtual point at which the movable switch arm 20 is disengaged from the power connection device.

In FIGS. 1 to 3, an active switch arm 20 and an RC circuit 30 are provided between the input terminal A and the output terminal B of the power outlet 10. The movable switch arm 20 is a strip-shaped sheet body made of a metal material, one end of which is connected to the power line, and the free end is a contact end that is in contact with the first conductive sheet 12 and the second conductive sheet 13. In this embodiment, the movable switch arm 20 is a power plug, one end of which is connected to the power line, and the other end is a contact end. When the power switch socket 20 is inserted into the power socket 10, the active switch arm 20 is electrically contacted with the first electrical contact 121 and the second electrical contact 131 in sequence from the disconnection point 11, respectively. When the active switch arm 20 contacts the first electrical contact 121, the RC circuit 30 is turned on, and the power socket 10 supplies power to the load connected to the output terminal B via the movable switch arm 20 and the RC circuit 30. Meanwhile, the RC circuit 30 It can suppress the surge generated by the moment when the circuit is turned on. After the delay, the movable switch arm 20 is moved to the second electrical contact 131. At this time, the movable switch arm 20 is in electrical contact with the first electrical contact 121 and the second electrical contact 131 at the same time, and the circuit of the power socket 10 is completely turned on. The RC circuit 30 only functions as a circuit. The RC circuit 30 can be any known RC power The circuit can be an RC circuit or a plurality of RC circuits connected in parallel. In this embodiment, the RC circuit 30 is formed by connecting the resistor R and the capacitor C in series. The two ends of the resistor R are respectively connected to the first conductive strip 12 and the capacitor C, and the other end of the capacitor C is electrically connected to the second conductive layer. The sheets 13 are connected. At the instant when the circuit of the power connection device 10 is turned on, the RC circuit 30 can suppress the surge generated by the circuit due to the transient overvoltage exceeding the normal operating voltage to ensure the safety of the power. At the moment when the circuit of the power connection device 10 is disconnected, the RC circuit 30 can eliminate the spark generated by the inductive load.

1 to 3 illustrate the operation of the structure of the present invention to turn on the power. As shown in Figure 1, at the break point 11, the circuit is in an open state, i.e., the power switch or power outlet is off, which is the initial state of the switch or socket power-on process. During the active switch arm 20, i.e., the power plug is inserted into the power outlet, the active switch arm 20 is inserted by a break point 11 located outside of the power outlet. 2, 3, during the power-on process, the active switch arm 20 first contacts the first electrical contact 121, so that the power supply is turned on via the RC circuit 30, as shown in FIG. 2, when the circuit of the power outlet 10 is turned on. In an instant, the RC circuit 30 can suppress surges due to transient overvoltages of the circuit beyond the normal operating voltage. As shown in FIG. 3, after a short delay, the movable switch arm 20 moves to the second electrical contact 131. At this time, the movable switch arm 20 simultaneously contacts the first electrical contact 121 and the second electrical contact 131, so that the power socket 10 The circuit is fully turned on.

During the power-on, the moving time of the movable switch arm 20 from the breaking point 11 to the second electrical contact 131 is T=T1+T2+T3; wherein T1 is the moving switch arm 20 moving from the breaking point 11 to The time of the first electrical contact 121, T2 is the on-time (residence time) of the active switch arm 20 at the first electrical contact 121, and T3 is the time when the movable switch arm 20 moves from the first electrical contact 121 to the second electrical contact 131. . In the above time, the time of T2 should be as long as possible, and its value should be RC<T2<3RC, where R is the value of the resistance in the circuit and C is the value of the capacitance in the circuit. The T3 in the above time is zero, which can be achieved by bringing the movable switch arm 20 into contact with the first electrical contact 121 and the second electrical contact 131 at the same time.

When the movable switch arm 20 moves from the first electrical contact 121 to the second electrical contact 131, The RC circuit connected to the first electrical contact 121 supplies power to the load, and the surge current of the circuit is suppressed because of the presence of the RC circuit. After the elapse of time T2, the active switch arm 20 contacts the second electrical contact 13, and the RC circuit does not function. In fact, the process of moving the movable switch arm 20 from the breaking point 11 through the first electrical contact 121 to the second electrical contact 131 is continuous, and in actual use, the presence of the first electrical contact 121 is not felt. When the movable switch arm 20 is moved into contact with the second electrical contact 131, the power connection device 10 is in an on state. At this time, the resistance of the power connection device is theoretically zero, that is, the relevant device in the power connection device does not have a load. influences.

When the power is to be disconnected, the movable switch arm 20 is first moved by the second electrical contact 131 to the first electrical contact 121, and then moved by the first electrical contact 121 to the open point 11, that is, the active switch arm 20 is pulled out of the power supply. The socket disconnects the power outlet 10 from the power source while the RC circuit 30 eliminates sparks due to inductive loads.

Example 2

In this embodiment, the power connection device 10 is a power switch, and the basic structure thereof is the same as that in the first embodiment. As shown in FIGS. 4-6, the power switch 10 includes a first conductive sheet 12, a second conductive sheet 13, a movable switch arm 20, and an RC circuit 30. The first conductive sheet 12 is displaceably disposed along the moving direction of the movable switch arm 20, so that the movable switch arm 20 contacts the first conductive sheet 12 and the second conductive sheet 13 in sequence, respectively, when the power is turned on; The second conductive sheet 13 is moved to the break point 11 via the first conductive sheet 12. The break point 11 is a virtual point at which the movable switch arm 20 is disengaged from the power connection device. One end of the movable switch arm 20 is hinged on a casing (not shown) of the power switch 10, and the contact end of the movable switch arm 20 and the first conductive piece 12 and the second conductive piece 13 is provided with a curved connecting piece. 21, the contact ends are respectively rotatable about the hinge point, such that the arcuate connecting piece 21 contacts or disengages the first conductive piece 12 and the second conductive piece 13 in the order of movement of the movable switch arm 20. When the movable switch arm 20 is moved by the first conductive sheet 12 to simultaneously contact the first conductive sheet 12 and the second conductive sheet 13, the power switch circuit is fully turned on. The power disconnection process is the same as in the embodiment 1.

An RC circuit 30 is connected between the first conductive sheet 12 and the second conductive sheet 13, and has the same structure and function as Embodiment 1.

Example 3

In this embodiment, the power connection device 10 is a push button switch, and the basic structure thereof is the same as that in the first embodiment. As shown in FIG. 7 to FIG. 9 , the push button switch 10 includes a button 14 , a curved conductive elastic piece 15 , an insulating plate 16 , and an RC circuit 30 . One end of the conductive elastic piece 15 is fixed on the insulating plate 16 and A first power contact 151 and a second electrical contact 152 are disposed on the conductive elastic piece 15. The first static electricity is respectively provided on the insulating plate 16 in electrical contact with the first electrical contact 151 and the second electrical contact 152. The contact 161 and the second stationary contact 162, the first stationary contact 161 and the second stationary contact 162 are electrically connected to the RC circuit 30, respectively. When the button 14 is pressed, the first electrical contact 151 of the conductive elastic piece 15 is first in electrical contact with the first stationary contact 161, and the power connection device circuit including the RC circuit 30 is turned on, and the power is turned on by the RC circuit 30. The current surge is suppressed; the conductive dome 15 is moved to contact with the second stationary contact 162 after a delay, and the power supply circuit is turned on. When the conductive elastic piece 15 is released, it is reset by the elastic force, and the electric spark at the time of the power-off is eliminated by the RC circuit 30.

Although the present invention has been disclosed by the above embodiments, the scope of the present invention is not limited thereto, and variations, substitutions, and the like of the above components will fall within the scope of the present invention. Within the scope of the claims.

Claims

A surge suppression and spark cancellation structure for a power connection device, characterized in that a first electrical contact (121) is provided between an input end (A) and an output end (B) of the power connection device (10), a second electrical contact (131) and a break point (11), and a conductive movable switch arm (20) connected to the power source is disposed between the input terminal (A) and the output terminal (B) of the power connection device (10). And at least one RC circuit (30), when the power is turned on, the movable switch arm (20) starts to move from the breaking point (11) and is first in electrical contact with the first electrical contact (121), and the conduction is included The power connection device circuit of the RC circuit (30) suppresses the surge when the power is turned on by the RC circuit (30); the movable switch arm (20) moves to the second electrical contact (131) after being delayed, And simultaneously contacting the first electrical contact (121) and the second electrical contact (131); when the power is turned off, the movable switch arm (20) is moved from the second electrical contact (131) to the first electrical contact ( 121), the RC circuit (30) eliminates the spark when the power is turned off by absorbing the back electromotive force generated by the load, and the movable switch arm (20) moves to the breaking point (11) after being delayed. Make power Bonding means (10) and power-off.
A surge suppression and spark cancellation structure for a power connection device according to claim 1, wherein said power connection device (10) is a power socket including a first conductive sheet (12) and a first conductive a second conductive sheet (13) in which the sheet (12) is misaligned, a movable switch arm (20) that is in contact with or detached from the first conductive sheet (12) and the second conductive sheet (13), and a first conductive sheet (12) And at least one RC circuit (30) between the second conductive sheet (13).
A surge suppression and spark cancellation structure for a power connection device according to claim 1, wherein said power connection device (10) is a power switch including a first conductive sheet (12) and a first conductive a second conductive sheet (13) in which the sheet (12) is misaligned, a movable switch arm (20) that is in contact with or detached from the first conductive sheet (12) and the second conductive sheet (13), and a first conductive sheet (12) And at least one RC circuit (30) between the second conductive sheet (13), the movable switch arm (20) is provided with an arc at a contact end of the first conductive sheet (12) and the second conductive sheet (13) Shape connecting piece (21), It contacts or disengages the first conductive sheet (12) and the second conductive sheet (13) in accordance with the movement order of the movable switch arm (20).
The surge suppression and spark cancellation structure of the power connection device of claim 1 , wherein the power connection device (10) is a push button switch comprising a button (14) and a curved conductive elastic piece ( 15) an insulating plate (16) and at least one RC circuit (30), wherein one end of the conductive elastic piece (15) is fixed on the insulating plate (16) and connected to a power source, and the conductive elastic piece (15) is provided with a first An electrical contact (151) and a second electrical contact (152) are provided with a first static contact in the insulating plate (16) in electrical contact with the first electrical contact (151) and the second electrical contact (152), respectively. (161) and a second stationary contact (162), the first stationary contact (161) and the second stationary contact (162) are electrically connected to the RC circuit (30), respectively, when the button (14) is pressed The first electrical contact (151) of the conductive elastic piece (15) is in electrical contact with the first stationary contact (161), and turns on the power connection device circuit including the RC circuit (30) through the RC circuit (30). The power surge is suppressed when the power is turned on; the conductive elastic piece (15) is moved to contact with the second stationary contact (162) after being delayed, and when the conductive elastic piece (15) is released, it is reset by the elastic force and passed The RC circuit (30) is eliminated Spark when the source is disconnected.
The surge suppression and spark cancellation structure of the power connection device according to claim 2, wherein the movable switch arm (20) is a power plug having one end connected to the power line and the other end being a contact end.
A surge suppression and spark cancellation structure for a power connection device according to claim 1, wherein said breaking point (11) is a point at which the movable switching arm (20) is disengaged from the power connection device.
A surge suppression and spark cancellation structure for a power connection device according to claim 2 or 3, wherein said first conductive sheet (12) and said second conductive sheet (13) are along said movable switching arm ( 20) The moving direction is misaligned, so that the movable switch arm (20) contacts the first conductive sheet (12), the second conductive sheet (13) or the second conductive sheet (13), and the first conductive sheet (12) in sequence. ), one end of the first conductive sheet (12) is a free end, and the other end is connected to the RC circuit (30) The resistor R is connected, and one end of the second conductive piece (13) is a free end, and the other end is connected to a capacitor C of the RC circuit (30).
The surge suppression and spark elimination structure of the power connection device according to claim 7, wherein the RC circuit (30) is formed by connecting a resistor R and a capacitor C in series, wherein two ends of the resistor R are respectively The first conductive sheet (12) and the capacitor C are connected, and the other end of the capacitor C is connected to the second conductive sheet (13).