CN101587801A

CN101587801A - Power switch with overload protection function

Info

Publication number: CN101587801A
Application number: CNA2009100997508A
Authority: CN
Inventors: 连文松
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-14
Filing date: 2009-06-14
Publication date: 2009-11-25

Abstract

A power switch with overload protection function comprises a base, a cover, a shell, a button, a movable bridging assembly, dual-metal sheet assembly, and a terminal assembly; the movable bridging assembly consists of a sliding block, a spring 1, a connection bridge and a movable contact; the dual-metal sheet assembly consists of a metal oscillating arm, a terminal pin, a dual-metal sheet and a copper rivet; the terminal assembly includes a metal terminal pin and a fixing contact; the metal terminal pin and the fixing contact are fixed together by riveting; the lamp pin assembly includes a lamp pin, a resistor, a spring 2 and a bulb; these assemblies are installed in a base; a sliding slot 2 is aligned to a bump; a tail portion of the connection bridge is close to the fulcrum of the metal oscillating arm and is pressed by the pressure provided by a torsional spring 2 on a column 3 sleeved in the base; the button is connected with a column 1 and a column 2 through a circular hole; a steel needle is inserted to a circular hole on a square column that is extended from a lower part of the button; one end of the steel needle is inserted to a sliding slot 1 in the sliding block; an end 1 of the torsional spring 1 is inserted to the hole of the button and the end 2 is supported on the bump.

Description

The mains switch of band overload protection function

Technical field

The present invention relates to a kind of switch, refer in particular to a kind of mains switch with overload protection function.

Background technology

The common power switch of being installed on the current domestic household electrical appliance series products (such as " supply socket ") does not possess the current overload protection protective function, when with load too much, occur electric current when excessive easy Yin Wendu too high and produce security incident.Some electric equipment has increased overload protective device for addressing this problem, and existing overload protective device function singleness, it has overload protection function, does not have to be used as the function that regular tap carries out manual power supply switching, has limited its scope of application.

Chinese patent once disclosed " a kind of recovered overload protective device of charged source switch " (China, publication number CN2660681, open day on December 1st, 2004), it is by an insulating body, two lug plates about being connected on the main body, a lug plate is fixed with sheet metal; The center of main body is equipped with the button connecting rod, be fixed with insulating trip on the lower end side of button connecting rod, the bottom, lower end of button connecting rod is equipped with a spring, and the center of button connecting rod is equipped with a L shaped rotating rod, the upper end head of rotating rod is with spring, and the top of rotating rod is fixed with knob.It combines mains switch and protector, utilizes the former contact of protector, is to improve on the basis of protector.

Summary of the invention

The object of the present invention is to provide a kind of mains switch with overload protection function, it has two kinds of functions, promptly has normal manual switching circuit on-off function and overload protection function.

For achieving the above object; the solution that the invention is taked is: a kind of mains switch with overload protection function; it comprises base; lid; shell; button; activity connects the bridge combination; the bimetal leaf combination; terminal combination; it is characterized in that: activity connects the bridge combination by slide block; spring one; connect the combination of bridge and armature contact; the armature contact riveting is in connecing the hole of bridge; spring one is assemblied in the hole of slide block and is pressed on and connects above the bridge; the bimetal leaf combination is by metal rocker arm; terminal supportor; bimetal leaf and copper rivet are formed; the bimetal leaf stiff end is by the stiff end of copper rivet riveting at terminal supportor; the bimetal leaf movable end passes through the copper rivet riveting at the rocking arm movable end; the bending of bimetal leaf drives bimetal leaf movable end knee-action; thereby driving metal rocker arm rotates; terminal combination comprises metal terminal pin and fixed contact; metal terminal pin and fixed contact are fixed together by riveting; the lamp base combination comprises lamp base; resistance; spring two and bulb; one end of bulb is by lamp base; resistance and spring two are pushed down and the other end is pushed down by terminal supportor; terminal combination; lamp base combination and bimetal leaf combination all are installed in the corresponding groove in bottom of base; activity connects the top of bridge combine and assemble at base; chute two in the slide block aim on the bases boss and with this guiding when sliding; meet the fulcrum D place that the bridge afterbody is close to metal rocker arm; and be pressed on the fulcrum D of metal rocker arm by being enclosed within the pressure that the torsion spring on the pillar three two provides in the base; button is connected by pillar one in circular hole and the base and the pillar two in the lid; pillar one and pillar two are on the same axis; button rotates around pillar one and pillar two; plug in draw point in the circular hole on the square pillar that stretch out the button bottom; one end of draw point is inserted in the middle of the chute one in the slide block, and the termination one of torsion spring one is inserted in the hole in the button and on the projection of termination two supports in lid.

The mains switch of this band overload protection function has normal manual switching circuit break-make and two kinds of functions of overload protection.It is combined in overload protection function in the middle of the regular tap function dexterously by structure cleverly, has realized a tractor serves several purposes.A switch had both had the function that the regular tap power supply switches, and had also had the function of overcurrent protection simultaneously.Can be used as the common power switch and use, can give circuit again with effective overload protection.Two kinds of product integrations of overload protective device and switch are in the same place in new design, constitute a product, have solved mains switch and the discrete problem of overload protective device in the past, have both saved the installing space of product own, have saved material again, have reduced cost.

Description of drawings

Fig. 1 is the mains switch closure state structural representation of band overload protection function.

Fig. 2 is the mains switch off-state structural representation of band overload protection function.

Fig. 3 is the mains switch normally status architecture schematic diagram of band overload protection function.

Fig. 4 is the mains switch overload trip status architecture schematic diagram of band overload protection function.

Fig. 5 is the power switch structure internal anatomy one of band overload protection function.

Fig. 6 is the power switch structure internal anatomy two of band overload protection function.

Among the figure: 10, shell, 11, square hole, 20, base, 22, pillar one, 23, boss, 24, pillar three, 30, lid, 31, protrude button bit, 32, pillar two, 33, projection, 40, button, 41, the hole, 42, termination one, 43, termination two, 50, activity connects bridge combination, 51, chute one, 52, chute two, 53, connect the bridge afterbody, 60, the bimetal leaf combination, 61, the bimetal leaf stiff end, 62, the bimetal leaf movable end, 63; rocking arm movable end, 70; lamp base combination; 80; terminal combination, 401; draw point, 402; torsion spring one; 403; torsion spring two, 501; slide block, 502; spring one; 503; connect bridge, 504; armature contact, 601; metal rocker arm; 602; terminal supportor, 603; bimetal leaf, 604; copper rivet; 701; bulb, 702; spring two, 703; resistance; 704; lamp base, 801; metal terminal pin, 802; fixed contact.

Embodiment

Below in conjunction with embodiment and accompanying drawing thereof the present invention is remake description.

Referring to Fig. 1-Fig. 6, a kind of mains switch with overload protection function, it comprises base 20, lid 30, shell 10, button 40, activity connect bridge combination 50, bimetal leaf combination 60, terminal combination 80.Activity connect bridge combination 50 by slide block 501, spring 1, connect bridge 503 and armature contact 504 combinations, armature contact 504 rivetings are in the hole that connects bridge 503, they play the circuit turn-on effect together.Spring 1 is assemblied in the hole of slide block 501 and is pressed on and connects above the bridge 503, provides circuit turn-on required contact pressure.Bimetal leaf combination 60 is made up of metal rocker arm 601, terminal supportor 602, bimetal leaf 603 and copper rivet 604; bimetal leaf stiff end 61 is by the stiff end of copper rivet 604 rivetings at terminal supportor 602; bimetal leaf movable end 62 passes through copper rivet 604 rivetings at rocking arm movable end 63; the bending of bimetal leaf 603 drives bimetal leaf movable end 62 knee-actions; rotate thereby drive metal rocker arm 601, thereby realize the circuit overloads defencive function.Terminal combination 80 comprises metal terminal pin 801 and fixed contact 802, and metal terminal pin 801 and fixed contact 802 are fixed together by riveting, play the conducting function of current.Lamp base combination 70 comprises lamp base 704, resistance 703, spring 2 702 and bulb 701, and an end of bulb 701 is pushed down by lamp base 704, resistance 703 and spring 2 702 and the other end is pushed down by terminal supportor 602, thus indicating circuit conducting whether situation.Terminal combination 80, lamp base combination 70 and bimetal leaf combination 60 all are installed in the corresponding groove in bottom of base 20, activity connects the top that bridge combination 50 is assemblied in base 20, chute 2 52 in the slide block 501 aim on the bases 20 boss 23 and with this guiding when sliding, meet the fulcrum D place that bridge afterbody 53 is close to metal rocker arm 601, and be pressed on the fulcrum D of metal rocker arm 601 by being enclosed within the pressure that the torsion spring on the pillar 3 24 2 403 provides in the base 20.When overload appears in switch, when electric current exceeded switch rating, the crooked metal rocker arm 601 that drives rotated bimetal leaf 603 because of temperature raises, the fulcrum D on the metal rocker arm 601 thereby after move, throw off and connect bridge 503.Activity connects the support that bridge combination 50 loses fulcrum D, pressure effect lower slider deflection at torsion spring 2 403, thereby open circuit, after circuit disconnects, bimetal leaf 603 does not return to straightened condition because of there being electric current to cool off, drive metal rocker arm 601 and rotate, fulcrum D returns to the origin-location, and switch can carry out normal running again.Button 40 is connected by pillar 1 in circular hole 42 and the base 20 and the pillar 2 32 in the lid 30, pillar 1 and pillar 2 32 are on the same axis, button 40 rotates around pillar 1 and pillar 2 32, plug in draw point 401 in the circular hole on the square pillar that stretch out button 40 bottoms, one end of draw point 401 is inserted in the middle of the chute 1 in the slide block 501, when button 40 actuatings, drive draw point 401 swings, slide block 501 slides because of the guiding of draw point 401 and chute 1, thereby drive connects bridge 503 and armature contact 504 moves, the termination 1 of torsion spring 1 is inserted in the hole 41 in the button 40 and on the projection 33 of termination 2 43 supports in lid 30, torsion spring 1 provides a directed elastic force for button 40, when activity connects axle assemble 50 and rotates under switch overload trip state, chute one 51 angles that stop button 40 to slide change, do not stop button 40 resiliences, button 40 springs back to open position automatically under the effect of torsion spring 1, and do not have when switch under the situation of overload, activity connects bridge combination 50 by fulcrum D jack-up, the angle of chute 1 is less, the up and down ramp of its protrusion stops button 40 to be rebounded by torsion spring 1, guarantees that switch is in conduction position.

Referring to Fig. 5, four square holes 11 of described shell 10 by its both sides are fastened on the protrusion button bit 31 that the side of base 20 and lid 30 all has, shell 10 is buckled into the integral body that can freely not get loose mutually with lid 30 and base 20, guaranteed the globality of product, it is again the support that is used to install switch simultaneously, is user-friendly to installation.

The mains switch of this band overload protection function structure cleverly is combined in overload protection function in the middle of the regular tap function dexterously.Realized a tractor serves several purposes, a switch had both had the function that the regular tap power supply switches, and had also had the function of overcurrent protection simultaneously.Two kinds of product integrations of overload protective device and switch are in the same place in new design, constitute new two-in-one switch, have both saved the installing space of product own, have saved material again, have reduced cost.

The mains switch of this band overload protection function has two kinds of functions, promptly normal manual switching circuit on-off function and overload protection function, and the principle of two kinds of functions is as follows:

One, the realization of normal Manual Transfer Switch function

Referring to Fig. 1,, in the chute 1 of slide block 501, slide thereby drive metal draw point 401 by manual operation switch button 40.When button 40 is placed in conduction position, metal draw point 401 is in the B position of chute 1, connect bridge 503 and closed, electric current by metal terminal pin 801, fixed contact 802 and armature contact 504, connect bridge 503, metal rocker arm 601, bimetal leaf 603 and terminal supportor 602 flows out.Referring to Fig. 2, when button 40 was placed in open position, metal draw point 401 was in the A position of chute 1, and slide block 501 head C are upspring by torsion spring 2 403, and drive connects bridge 503 and lifts and make armature contact 504 and fixed contact 802 to disconnect.

Two, the realization of overload protection function

Referring to Fig. 3, switch is in conducting state, and when the electric current by switch during less than the switch rated current, bimetal leaf 603 caloric values are less, are in comparatively straightened condition.Electric current by terminal supportor metal terminal pin 801, fixed contact 802 and armature contact 504, connect bridge 503, metal rocker arm 601, bimetal leaf 603 and terminal supportor 602 and normally flow out.Referring to Fig. 4, when the electric current by switch greater than rated current, bimetal leaf 603 thereby heating are crooked, drive metal rocker arm 601 swings, the fulcrum D on the metal rocker arm 601 outwards moves, and activity connects axle assemble 50 and loses support, under the effect of torsion spring 2 403, switch disconnects.And switch remains on off-state until there being the people to intervene under the effect of torsion spring 1.When switch temperature cools down, Push switch button 40 is to reset position, this moment, switch can normally use again because bimetal leaf 603 because of the straightened condition of cooling recovery, returns to the position that original support activity connects axle assemble 50 thereby drive metal rocker arm 601.

Claims

1; a kind of mains switch with overload protection function; it comprises base (20); lid (30); shell (10); button (40); activity connects bridge combination (50); bimetal leaf combination (60); terminal combination (80); it is characterized in that: activity connects bridge combination (50) by slide block (501); spring one (502); connect the combination of bridge (503) and armature contact (504); armature contact (504) riveting is in the hole that connects bridge (503); spring one (502) is assemblied in the hole of slide block (501) and is pressed on and connects above the bridge (503); bimetal leaf combination (60) is by metal rocker arm (601); terminal supportor (602); bimetal leaf (603) and copper rivet (604) are formed; bimetal leaf stiff end (61) is by the stiff end of copper rivet (604) riveting in terminal supportor (602); bimetal leaf movable end (62) passes through copper rivet (604) riveting in rocking arm movable end (63); the bending of bimetal leaf (603) drives bimetal leaf movable end (62) knee-action; thereby driving metal rocker arm (601) rotates; terminal combination (80) comprises metal terminal pin (801) and fixed contact (802); metal terminal pin (801) and fixed contact (802) are fixed together by riveting; lamp base combination (70) comprises lamp base (704); resistance (703); spring (702) and bulb (701); one end of bulb (701) is by lamp base (704); resistance (703) and spring two (702) are pushed down and the other end is pushed down by terminal supportor (602); terminal combination (80); lamp base combination (70) and bimetal leaf combination (60) all are installed in the corresponding groove in bottom of base (20); activity connects the top that bridge combination (50) is assemblied in base (20); chute two (52) in the slide block (501) aim on the bases (20) boss (23) and with this guiding when sliding; meet the fulcrum D place that bridge afterbody (53) is close to metal rocker arm (601); and the pressure that provides by the torsion spring two (403) that is enclosed within on the middle pillar three (24) of base (20) is pressed on the fulcrum D of metal rocker arm (601); button (40) is connected by pillar one (22) in circular hole (42) and the base (20) and the pillar two (32) in the lid (30); pillar one (22) and pillar two (32) are on the same axis; button (40) rotates around pillar one (22) and pillar two (32); plug in draw point (401) in the circular hole on the square pillar that stretch out button (40) bottom; one end of draw point (401) is inserted in the middle of the chute one (51) in the slide block (501), and the termination one (42) of torsion spring one (402) is inserted in the hole (41) in the button (40) and on the projection (33) of termination two (43) supports in lid (30).

2, the mains switch of band overload protection function according to claim 1; it is characterized in that: four square holes (11) of described shell (10) by its both sides are fastened on the protrusion button bit (31) that the side of base (20) and lid (30) all has, and shell (10) is buckled into the integral body that can freely not get loose mutually with lid (30) and base (20).