CN201230073Y

CN201230073Y - Plug having electricity leakage protection function

Info

Publication number: CN201230073Y
Application number: CNU2008200995700U
Authority: CN
Inventors: 田玉江
Original assignee: FOSHAN CITY SHUNDE DISTRICT XINHUIDA ELECTRONICS Co Ltd
Current assignee: FOSHAN CITY SHUNDE DISTRICT XINHUIDA ELECTRONICS Co Ltd
Priority date: 2008-07-22
Filing date: 2008-07-22
Publication date: 2009-04-29
Anticipated expiration: 2018-07-22

Abstract

The utility model relates to a plug with electric leakage protection, which comprises a shell, a circuit board, a mounting bracket, two power supply pins, two grounding pins, two flexible dynamic contact plates which match with the power supply pins and a switch compression bar. The plug with electric leakage protection is characterized by also comprising grounding dynamic contact plates, a pushing block, a large reset spring, a pressing arm, an electromagnetic coil, an iron core, a small reset spring, a clamp ring and a tripping plate; wherein, one end of the grounding dynamic contact plates is arranged on the circuit board; the grounding dynamic contact plates match with the grounding pins; the pushing block is fixed on the switch compression bar; the large reset spring can reset the switch compression bar; the other ends of the grounding dynamic contact plates are arranged on the pushing block; the pressing arm is sleeved on the switch compression bar, matches with the gap of the switch compression bar, and is provided with two supporting arms; the two flexible dynamic contact plates are arranged on and pushed by the two supporting arms; the middle part of the pressing arm is provided with a horizontal slot; the electromagnetic coil is fixed in the mounting bracket; the iron core is arranged in the electromagnetic coil; the small reset spring can reset the iron core; a clamp ring is arranged at the external end of the iron core; the tripping plate is provided with a horizontal plug-in component and a vertical connecting component; a clamp groove is arranged on the switch compression bar; the horizontal plug-in component is positioned in the slot and can slide; a horizontal U-shaped clamp opening which matches with the clamp groove is arranged on the horizontal plug-in component; a vertical U-shaped opening which matches with the clamp ring is positioned on the vertical connecting component; and thus the tripping plate can be pulled by the iron core.

Description

The plug of band creepage protection function

Technical field

The utility model relates to a kind of plug with creepage protection function.

Background technology

The plug of existing band creepage protection function comprises housing, be fixed on the wiring board in the housing, fixing installing rack in the circuit board, be located at two power pins and grounding pin on the installing rack, the fixing two elasticity movable contact springs that cooperate with power pin in the circuit board of one end, switch depression bar and the solenoid that suction is employed; Its structure is that grounding pin occurs can not using dangerous immediately with dump when charged.

The utility model content

The utility model is to overcome the deficiencies in the prior art and provide a kind of simple in structure, and volume is little, and production cost is low, a kind of plug with creepage protection function safe in utilization, reliable.

In order to achieve the above object, the utility model is to realize like this, it is a kind of plug with creepage protection function, comprise housing, be fixed on the wiring board in the housing, fixing installing rack in the circuit board is located at two power pins and grounding pin on the installing rack, the fixing two elasticity movable contact springs and the switch depression bar that cooperate with power pin in the circuit board of an end; It is characterized in that: comprise that also an end is located at the ground connection movable contact spring that cooperates with grounding pin on the wiring board; Comprise also being fixed on the pushing block on the switch depression bar and being located at the big back-moving spring that the switch depression bar is resetted on the housing that the other end of ground connection movable contact spring is positioned on the pushing block; Also comprise be set on the switch depression bar and with the pressure arm that has two support arms of its matched in clearance, on installing rack, be provided with two chutes, thereby two support arms of pressure arm are arranged in two chutes makes pressure arm directed mobile, thereby two elasticity movable contact springs are positioned on two support arms and promoted by it, are provided with a horizontal slot at the middle part of pressure arm; Also comprise the solenoid that is fixed in the installing rack, be located at iron core in the solenoid and the little back-moving spring that iron core is resetted, be provided with snap ring in the outer end of iron core; Also comprise the dropout sheet that has horizontal plug-in unit and vertical connector, on the switch depression bar, be provided with a draw-in groove, laterally plug-in unit is arranged in the slot of pressure arm and slidably, laterally be provided with the horizontal U-shaped bayonet socket that cooperates with the draw-in groove of switch depression bar on the plug-in unit, vertically be provided with vertical U-shaped opening on the connector, the snap ring of iron core is located in vertical U-shaped opening, thereby the dropout sheet is subjected to the pulling of iron core.

Described two elasticity movable contact springs have trailing arm and transverse arm, fixedly connected with wiring board in the end of trailing arm, and transverse arm is downward-sloping, is provided with moving contact in the end of transverse arm; End at two power pins is provided with fixed contact, and moving contact cooperates with fixed contact.

Described grounding wafer is downward-sloping, and one end and wiring board are fixed, and the other end is provided with moving contact, and fixed contact is located at the end of grounding pin, and this end of grounding pin inserts in the draw-in groove of installing rack, and moving contact cooperates with fixed contact.

The utility model advantage compared with prior art is, the ground connection movable contact spring is directly fixing, and grounding pin directly is inserted on the installing rack in the circuit board, and grounding pin is an one with the end that fixed contact is installed, and is simple in structure, is convenient to assembling, and production cost is low; It is to rely on ground connection movable contact shell fragment self elastic force to realize that grounded circuit is connected, and disconnection is to rely on big spring pull switch depression bar interlock ground connection movable contact spring to realize; During power-on, ground wire is connected earlier, energized behind the major loop; During powered-down, major loop is cut off the electricity supply earlier, disconnects behind the grounded circuit, and the utility model meets national standard fully, and is safe in utilization, reliable.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an explosive view of the present utility model;

Fig. 3 is the stereogram that the utility model removes shell, circuit plate installing rack.

Embodiment

Below in conjunction with drawings and Examples the utility model is done further detailed description:

As shown in Figure 1, 2, 3, it is a kind of plug with earth leakage protective device, comprise housing 3, be fixed on the wiring board 4 in the housing, fixing installing rack 13 in the circuit board, be located at two power pins 10 and the fixing two elasticity movable contact springs 17 and the switch depression bar 2 that cooperate with power pin in the circuit board of grounding pin 12, one ends on the installing rack; One end of switch depression bar is positioned at outside the housing.It comprises that also an end is located at the ground connection movable contact spring 16 that cooperates with grounding pin on the wiring board; Also comprise the pushing block 15 that is fixed on the switch depression bar 2 and be located at the big back-moving spring 11 that the switch depression bar is resetted on the housing, the other end of ground connection movable contact spring is positioned on the pushing block, thereby pushing block can promote this end of ground connection movable contact spring, with the conducting and the disconnection of control ground connection movable contact spring and grounding pin; Also comprise be set on switch depression bar 2 other ends and with the pressure arm that has two support arms 141 14 of its matched in clearance, on installing rack 13, be provided with two chutes 132, two support arms of pressure arm are arranged in two chutes makes its directed moving, thereby two elasticity movable contact springs are positioned on two support arms of pressure arm and promoted by it, are provided with a horizontal slot 142 at the middle part of pressure arm; Also comprise the solenoid 6 that is fixed in the installing rack, be located at iron core 8 in the solenoid and the little back-moving spring 5 that iron core is resetted, be provided with snap ring 81 in the outer end of iron core; Also comprise the dropout sheet 9 that has horizontal plug-in unit 92 and vertical connector 91, on the switch depression bar, be provided with a draw-in groove 21, laterally plug-in unit is arranged in the slot of pressure arm and slidably, laterally be provided with the horizontal U-shaped bayonet socket that cooperates with the draw-in groove of switch depression bar on the plug-in unit, when horizontal U-shaped bayonet socket is arranged in the draw-in groove of switch depression bar, can be with switch depression bar axial location, thereby fuse with pressure arm (snap close), on the vertical connector of dropout sheet, be provided with vertical U-shaped opening, the snap ring of iron core is located in vertical U-shaped opening, thereby make the dropout sheet be subjected to skid off after the pulling of iron core the draw-in groove of switch depression bar, make the switch depression bar separate (dropout) with pressure arm; In the present embodiment, two elasticity movable contact springs 17 have trailing arm and transverse arm, fixedly connected with wiring board 14 in the end of trailing arm, and transverse arm is downward-sloping, and transverse arm is positioned on the support arm 141 of pressure arm, is provided with moving contact 171 in the end of transverse arm; Be provided with fixed contact 101 in the end of two power pins 10, moving contact cooperates with fixed contact, thereby makes itself and power connection or disconnection.Ground connection movable contact spring 16 is downward-sloping, the one end is fixed on the wiring board 4 and is connected with the ground connection output line, and the other end is provided with moving contact 161, establishes fixed contact 121 in the end of grounding pin 12, moving contact cooperates with fixed contact, thereby controls being switched on or switched off of grounding pin and ground connection output line.Also be provided with two slots 131 on installing rack 13, an end of power pin 10 is inserted in this slot, slot 133 in the middle of on installing rack, also being provided with, and an end of grounding pin 12 is inserted in this slot.

When using, energized, switch depression bar 2 is down pressed, promote at little back-moving spring 5 elastic force under the effect of iron core 8, the horizontal U-shaped opening of the horizontal plug-in unit 92 of dropout sheet 9 slips in the draw-in groove 21 switch depression bar and pressure arm is axially fastened fuse (snap close), at this moment, the moving contact 171 of two elasticity movable contact springs is electrically connected with fixed contact 101 on two power pins, and the moving contact 161 of ground connection movable contact spring is electrically connected with the fixed contact of grounding pin.When electric leakage (or earth connection is charged) phenomenon occurring, thereby solenoid will produce high-intensity magnetic field by control circuit and power connection, effect lower core in solenoid magnetic field spurs dropout sheet 9 rapidly, and promote little back-moving spring 5 toward retraction, the horizontal U-shaped opening of dropout sheet shifts out draw-in groove (dropout), under the effect of big back-moving spring 11, the switch depression bar is up motion rapidly, pushing block 15 is up motion thereupon, pushing block up moves an end of ground connection movable contact spring 16, moving contact on the ground connection movable contact spring separates with the fixed contact of grounding pin, thereby grounding pin is cut off with the ground connection output line that is connected the ground movable contact spring; Simultaneously, two elasticity movable contact springs reset pressure arm 14 toward pressing down, and the moving contact on the elasticity movable contact spring separates with fixed contact on two power pins, thereby cuts off the electricity supply, and has played the earth leakage protective effect.

Claims

1, a kind of plug with creepage protection function, comprise housing, be fixed on the wiring board in the housing, fixing installing rack in the circuit board, be located at two power pins and grounding pin on the installing rack, the fixing two elasticity movable contact springs and the switch depression bar that cooperate with power pin in the circuit board of an end; It is characterized in that: comprise that also an end is located at the ground connection movable contact spring (16) that cooperates with grounding pin on the wiring board; Also comprise the pushing block (15) that is fixed on the switch depression bar (2) and be located at the big back-moving spring (11) that the switch depression bar is resetted on the housing, the other end of ground connection movable contact spring is positioned on the pushing block; Also comprise be set in that switch depression bar (2) is gone up and with the pressure arm that has two support arms (141) (14) of its matched in clearance, on installing rack (13), be provided with two chutes (132), thereby two support arms of pressure arm are arranged in two chutes makes it to moving, thereby two elasticity movable contact springs are positioned on two support arms and promoted by it, are provided with a horizontal slot (142) at the middle part of pressure arm; Also comprise the solenoid (6) that is fixed in the installing rack, be located at iron core (8) in the solenoid and the little back-moving spring (5) that iron core is resetted, be provided with snap ring (81) in the outer end of iron core; Also comprise the dropout sheet (9) that has horizontal plug-in unit (92) and vertical connector (91), on the switch depression bar, be provided with a draw-in groove (21), laterally plug-in unit is arranged in the slot (142) of pressure arm and slidably, laterally be provided with the horizontal U-shaped bayonet socket that cooperates with the draw-in groove of switch depression bar on the plug-in unit, vertically be provided with vertical U-shaped opening on the connector, the snap ring of iron core is located in vertical U-shaped opening, thereby the dropout sheet is subjected to the pulling of iron core.

2, the plug of band creepage protection function according to claim 1, it is characterized in that: described two elasticity movable contact springs (17) have trailing arm and transverse arm, fixedly connected with wiring board (14) in the end of trailing arm, transverse arm is downward-sloping, is provided with moving contact (171) in the end of transverse arm; Be provided with fixed contact (101) in the end of two power pins (10), moving contact cooperates with fixed contact.

3, the plug of band creepage protection function according to claim 1; it is characterized in that: described grounding wafer (16) is downward-sloping; one end and wiring board (4) are fixing; the other end is provided with moving contact (161); fixed contact (121) is located at the end of grounding pin (12); this end of grounding pin inserts in the draw-in groove (133) of installing rack (13), and moving contact cooperates with fixed contact.