CN2343671Y

CN2343671Y - Over-current disconnection switch

Info

Publication number: CN2343671Y
Application number: CN 98219982
Authority: CN
Inventors: 游隆寿
Original assignee: HUAWAN ELECTRIC MOTOR INDUSTRIAL Co Ltd
Current assignee: HUAWAN ELECTRIC MOTOR INDUSTRIAL Co Ltd
Priority date: 1998-10-20
Filing date: 1998-10-20
Publication date: 1999-10-13
Anticipated expiration: 2008-10-20

Abstract

The utility model relates to an over-current disconnection switch, which is mainly formed by that a key block is pivoted on the switch main body, and a plurality of conductive terminals are separately arranged at the interior of the switch main body, wherein, a set of conductive terminals is provided with a bimetallic strip, the bimetallic strip is a transparent platinum contact in normality, forms an electrical connection with another conductive terminal, a brake rod is pivoted on one end of the key block, and the lower end of the brake rod is provided with an isolating block. When the key block is switched to the other end, the isolating block of the brake rod pushes aside the bimetallic strip, and the disconnection is formed. When the key block is pressed by a weight, the bimetallic strip can be still automatically disconnected when the overload is occurred, and the safety of power utilization can be ensured.

Description

The overcurrent disconnect

The utility model relates to a kind of overcurrent disconnect.

A kind of bimetal leaf safety switch with overcurrent protection; as shown in Figure 6; mainly be to be pivoted with a seesaw type button piece 81 in a body 80 upper ends; body 80 inner corresponding aforementioned keys pieces 81 belows are arranged with two

binding posts

82,83 again; wherein a binding post 82 is provided with a bimetal leaf 84; the corresponding position of bimetal leaf 84 free ends and another binding post 83 be arranged with platinum contact 840,830, two platinum contacts 840,830 and with upper and lower to relatively.

Button piece 81 at one end is pivoted with an operating bar 85 again, and operating bar 85 bottoms are affixed with bimetal leaf 84 free ora terminalis, is provided with an inverted U-shaped spring leaf 86 again between operating bar 85 lower ends and body 80 inwalls, so that make bimetal leaf 84 easier trippings when switching.

In preceding figure, switch is to be closed condition, meaning is a bimetal leaf 84 and the two platinum contact the 840, the 830th of binding post 83, is the open-circuit condition that does not contact, it desires to make switch to be opening, piece 81 end in addition promptly pushes button, make operating bar 85 hold in addition with button piece 81 and move down, at this moment, bimetal leaf 84 promptly is the conducting state (as shown in Figure 7) that contacts with the platinum contact 840,830 of binding post 83.

When the overload phenomenon took place in load, bimetal leaf 84 raise Yin Wendu and is out of shape, and it cooperates the elastic force of spring leaf 86 and tripping automatically, and constitutes overcurrent protection.

Above-mentioned switch designs; really can reach the purpose of overcurrent protection in theory; yet under some special state; its excess current protective function will perform practically no function; its situation is that the button piece 81 of aforementioned switches is pushed down by weight when cutting to opening; then affixed because of bimetal leaf 84 1 ends and operating bar 85; when button piece 81 pressurizeds; operating bar 85 also can't move, when this moment as generation overload phenomenon, though bimetal leaf 84 will be out of shape; but be subjected to pining down of operating bar 85 on the contrary and can't tripping; under this state, promptly can't bring into play due excess current protective function fully, and then jeopardize Electrical Safety.

From the above, the conventional security switch is lost excess current protective function when weight is suppressed, and this will have a strong impact on Electrical Safety, be further improved.

The purpose of this utility model be to provide a kind of be subjected to the weight compacting still can be when overload the safety-type overcurrent disconnect of deenergization.

The purpose of this utility model is to realize like this, a kind of overcurrent disconnect, it is characterized in that: mainly on Switch main body, be pivoted with a button piece, and set up plurality of conductive terminals separately in inside, wherein one group of conducting terminal is provided with the bimetal leaf that is positioned at vertical direction, this bimetal leaf also constitutes electric the contact with another conducting terminal, the button piece at one end is pivoted with a brake bar again, the brake bar lower end is provided with a spacing block, this spacing block is between between bimetal leaf and the relative conducting terminal, when the button piece is cut on off state, the spacing block of brake bar will on move and back down bimetal leaf and open circuit with formation.

Above-mentioned overcurrent disconnect, it is characterized in that: a conducting terminal extends to form lug in the outer upper end place, be connected with bimetal leaf on this lug, make bimetal leaf both sides fate be vertical up and down, another conducting terminal is to be the shape, its horizontal ends inner side edge has extended to form a lug with vertical direction, and this lug medial surface is provided with platinum contact, and it is with respect to platinum contact set on the bimetal leaf free end.

Above-mentioned overcurrent disconnect is characterized in that: be provided with a flexible member in the appropriate location in the Switch main body, flexible member one end is to stay on button piece one bottom portion, and is positioned at same end with brake bar.

Above-mentioned overcurrent disconnect, it is characterized in that: the free ora terminalis of this bimetal leaf is gone out a teat that protrudes in medial surface, a hypotenuse has been gone out at the bottom place that teat is provided with platinum contact, the collets of brake bar lower end upper end also is formed with a relative inclined-plane again, utilizes this relative hypotenuse and inclined-plane can be easy to bimetal leaf is backed down.

Owing to adopted above-mentioned technical solution, when weight is pushed down the button piece, or during button piece generation stuck phenomenon itself, bimetal leaf is tripping automatically when load current is too high, and guarantees Electrical Safety.

Further specify specific structural features of the present utility model and purpose below in conjunction with accompanying drawing.

Fig. 1 is a three-dimensional exploded view of the present utility model;

Fig. 2 is a main pseudosection of the present utility model;

Fig. 3 is a side cutaway view of the present utility model;

Fig. 4 is that master of the present utility model looks section and action schematic diagram;

Fig. 5 is side-looking section of the present utility model and action schematic diagram;

Fig. 6 is the main pseudosection of conventional security switch;

Fig. 7 is that the master of conventional security switch looks section and action schematic diagram.

Each main element of the present utility model as seen from Figure 1, it includes a Switch main body 10, and is hubbed at Switch main body 10 upper ends and decontrols the bimetal leaf 13, that closes action and be hubbed at the brake bar 30 of button piece 11 1 ends and an envelope and be located at cover plate 14 on the Switch main body 10 open sidewalls for pushing on the button piece 20 that produces switch motion, the conducting

terminal

11,12 of some groups of penetrating switch body 10 bottoms, the conducting terminal 11 located therein for constituting to inhale with another conducting terminal 12.

Wherein: be formed with a rectangular channel chamber 15 on this Switch main body 10, this groove chamber 15 is penetrating switch body 10 top end faces and lateral wall respectively, and the relative cell wall place of 15 upper ends, groove chamber is formed with pivot hole 150 respectively again.For being pivoted button piece 20.This button piece 20 is manner of execution of similar seesaw.Side wall centers place is formed with pivot post 21 respectively before and after it, in the pivot hole 150 that is hubbed on the aforementioned switches body 10, makes button piece 20 two ends can make relative knee-action; Button piece 20 1 bottom portions are provided with a pivot 22 again, for being pivoted aforementioned brake bar 30, its same end below is provided with a flexible member 16, in present embodiment, this flexible member 16 is to be made of spring, and its two ends stay on respectively between the bottom land of outstanding suitably height in button piece 20 1 bottom portions and the groove chamber 15.Be placed through the two ends of flexible member 16 respectively and located and this bottom portion of

aforementioned keys piece

20 and 15 bottom land places, groove chamber are formed with reference column 201,101, two reference columns 201,101 respectively.

These brake bar 30 upper ends are formed with pivot hole 31, wear for aforementioned pivot 22 pivots, inboard, brake bar 30 lower end is provided with a spacing block 32 again, this spacing block 32 is to be made of the bakelite that insulate, they will be with brake bar 30 upper and lower displacements, and the tripping of control bimetal leaf 13 whether, and spacing block 32 has suitable thickness again, and is formed with an inclined-plane 320 in surperficial upper end.

Aforesaid conducting terminal 11 is to have extended to form lug 110 in the outer upper end place, this lug 110 is for setting firmly bimetal leaf 13, and make bimetal leaf 13 both side edges be vertical towards upper and lower respectively, bimetal leaf 13 free ends are gone out the teat 130 of an outstanding medial surface again, then be provided with platinum contact 131 on the teat 130, bimetal leaf 13 free ends bottom on teat 130 then forms hypotenuse 132 (please cooperate consult shown in Figure 3) simultaneously again.

Still see also shown in Figure 1, aforementioned another conducting terminal 12 is to be the shape, its horizontal ends inner side edge has extended to form a lug 120 with vertical direction, these lug 120 medial surfaces are provided with platinum contact 121, it is with respect to platinum contact 121 set on bimetal leaf 13 free ends, under the normality, the two is the conducting state that is contact.

Aforementioned components sees also Fig. 2, shown in Figure 3 through the space kenel of combination, wherein the spacing block 32 of brake bar 30 lower ends is to be positioned at the free ora terminalis of

bimetal leaf

13 and 120 of the lugs (as shown in Figure 3) of conducting terminal 12, in present embodiment, this spacing block 32 is to be positioned at platinum contact 121,131 outsides (seeing also shown in Figure 2).

In Fig. 2, on off state shown in Figure 3, the platinum contact 131,121 of bimetal leaf 13 and conducting terminal 12 constitutes and is electrically connected and is the unlatching shape.When desiring to make switch to cut to closed condition, the piece 20 former ends in addition that are projection then push button, make former being on the end that presses down move, spacing block 32 will upwards move (as shown in Figure 4) with brake component 30 this moment, and spacing block 32 and will upwards move (as shown in Figure 5) along the hypotenuse 132 of bimetal leaf 13 free ora terminalis with the inclined-plane 320 of its upper end, and progressive bimetal leaf 13 is outwards pushed open, when spacing block 32 arrives the location, bimetal leaf 13 promptly is the open circuit shape with the platinum contact 131,121 of conducting terminal 12, promptly is with regard on off state and closes shape.

Can find out the working method of the utility model execution switching function by above-mentioned explanation, and the most special advantage of the utility model is: when button piece 20 is cut to opening, when it can't be automatically reset as pushed down by weight, then bimetal leaf 13 tripping automatically when temperature is too high, and not pind down by button piece 20.Focusing on of main design: bimetal leaf 13 is to be in erectility, itself and 30 no direct marriage relations of brake bar, the knee-action of this brake bar 30 only affects spacing block 32 synchronous shift, under normal condition, removing up and down of spacing block 32 can be backed down bimetal leaf 13 or be made it reset, as when aforesaid weight taking place pushing down button piece 20 situations, then there is no marriage relation because of

brake bar

30 and 13 of bimetal leafs, when load current too high, when causing bimetal leaf 13 to raise, bimetal leaf 13 tripping automatically, and the influence that not can't move by button piece 20 and brake bar 30.

Claims

1. overcurrent disconnect, it is characterized in that: on Switch main body, be pivoted with a button piece, and set up plurality of conductive terminals separately in inside, wherein one group of conducting terminal is provided with the bimetal leaf that is positioned at vertical direction, this bimetal leaf also constitutes electric the contact with another conducting terminal, the button piece is pivoted with a brake bar in an end again, the brake bar lower end is provided with a spacing block, this spacing block is between between bimetal leaf and the relative conducting terminal, when the button piece is cut on off state, the spacing block of brake bar will on move and back down bimetal leaf and open circuit with formation.

2. according to the described overcurrent disconnect of claim 1, it is characterized in that: a conducting terminal extends to form lug in the outer upper end place, be connected with bimetal leaf on this lug, make bimetal leaf both sides fate be vertical up and down, another conducting terminal is to be the shape, its horizontal ends inner side edge has extended to form a lug with vertical direction, and this lug medial surface is provided with platinum contact, and it is with respect to platinum contact set on the bimetal leaf free end.

3. according to the described overcurrent disconnect of claim 1, it is characterized in that: be provided with a flexible member in the appropriate location in the Switch main body, flexible member one end is to stay on button piece one bottom portion, and is positioned at same end with brake bar.

4. according to claim 1 or 2 described overcurrent disconnects, it is characterized in that: the free ora terminalis of this bimetal leaf is gone out a teat that protrudes in medial surface, a hypotenuse has been gone out at the bottom place that teat is provided with platinum contact, the collets of brake bar lower end upper end also is formed with a relative inclined-plane again, utilizes this relative hypotenuse and inclined-plane can be easy to bimetal leaf is backed down.