CN1034035C

CN1034035C - Electric switch

Info

Publication number: CN1034035C
Application number: CN93102495A
Authority: CN
Inventors: 黄彬
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-04
Filing date: 1993-03-01
Publication date: 1997-02-12
Anticipated expiration: 2013-03-01
Also published as: CN1076054A; GB2265255A; GB2265255B; HK91696A; GB9204644D0

Abstract

An electrical switch comprises a body having a wall, supporting a plurality of switch terminals each passing through the wall from an inner to an outer side thereof, a movable contact member located within the body, and an operating member for moving the contact member from a first position in electrical contact with two of the switch terminals to a second position out of electrical contact with at least one of the two switch terminals. The inner side of the wall is provided with a projection and recesses to lengthen the surface path between the terminals in order to avoid arcing or flash-over between adjacent switch terminals. A resiliently compressible indexing member is provided between the inner surface of a top wall of the switch body and a facing surface of the operating member. The indexing member and one of these two surfaces have complementary formations for engagement to define the first position of the contact member.

Description

Electric switch

The present invention relates to a kind of electric switch.

Electric switch for example is widely used in the home appliances.As everyone knows, respectively adjoin between the switch terminal in the electric switch body and may produce spark, electric arc or flashover, particularly use through long-term, pile up around the switch terminal in switch or when building up the material of the dust that contains metallic that has one deck to discharge, particulate, deposit etc. and so on because of the switch motion of electrical/mechanical, all the more so.Any this class deposit can be more likely when particularly having moisture to exist or cause the generation of electric spark, electric arc or flashover more continually.

General electric switch all is equipped with control member, the switch element of conduction is housed on the control member, the human control member that uses switch just can make switch element slide and contact with two switch terminals in the Switch main body, to control external electrical or the electronic circuit that is connected with described switch terminal.Switch element is pushed down switch terminal by means of the thrust of interactional spring between control member and switch element.Thereby this spring also is used for promoting control member makes it be pressed in Switch main body inboard and control member cooperating, determines the stable or effective position of the switch of control member.It is found that the way of existing this definite control member position of the switch is unreliable and/or can not be satisfactory.

The present invention seeks to provide a kind of electric switch that is intended to address the above problem or relax at least the problems referred to above.

According to a first aspect of the present invention, electric switch provided by the invention has a body, this Switch main body has a body wall supporting a plurality of switch terminals, each described switch terminal passes body wall to the body wall outside from the body wall inboard, also dispose movable conductive on-off element in the body, control member is being supported by body, switch element can be moved on to and described two primary importances that switch terminal electrically contacts selectively, and move on at least one second place that disengages on electric with described two switch terminals, wherein its shape system of the inboard of body wall between described two switch terminals to be processed into the surperficial path that makes between them elongated.

Body wall preferably has recess in described two switch terminal inboards.

Not so or in addition, can between described two switch terminals, form a projection that stretches out from the inboard of body wall.

Above-mentioned recess and/or projection are preferably on the direction opposite with the imagination line of separating described two switch terminals and extend outside described two switch terminals.

In concrete structure, the described switch terminal of electric switch of the present invention has two rows, respectively drain into rare two described switch terminals, wherein the inboard of body wall between described at least two switch terminals is provided with one or described recess, and is provided with one or described projection between this two row switches terminal.

Generally speaking, it is tabular that body wall can be, and switch element can slide on the inner that switch terminal exposes.

According to a second aspect of the present invention, electric switch provided by the invention has a body, this body has a lower wall and a upper wall, lower wall is supporting a plurality of switch terminals, each described switch terminal passes lower wall to the lower wall outside from the lower wall inboard, also be mounted with a slidably conductive on-off element in the body, also have a control member supporting by body, make switch element can slide into the primary importance that electrically contacts with two described switch terminals selectively in view of the above, and slide into one of them of described two switch terminals the second place that disengages on electric, but wherein be provided with the align member of elastic compression in upper wall inner surface and the control member between the front surface of part, this align member engages with a surface complementarity in described two surfaces, determines the described primary importance of switch element.

Described align member is preferably got the form of sheet spring.

In concrete structure, the aforesaid operations member also has the outer part of a total sectional area less than interior part, and outer part is passed a hole that forms on the Switch main body upper wall, interior part flush switch body upper wall back.

Above-mentioned spring preferably also has a hole, thereby makes the outer part of control member also can pass through this hole, makes the sheet spring in place.

In any case control member system is configured to make its slip all to remain at perpendicular to being on the same position with respect to the Switch main body upper wall on the direction of Switch main body upper wall inner surface, does beneficial like this.

Align member preferably is supported on the two ends that stand the corresponding ledge of the described front surface of part in control member.

Only illustrate in greater detail content of the present invention referring now to accompanying drawing with the form of giving an example; In the accompanying drawing:

Fig. 1 is the top perspective of an embodiment of electric switch of the present invention;

Fig. 2 is the bottom perspective view of Fig. 1 electric switch;

Fig. 3 is the side sectional view of Fig. 1 electric switch;

Fig. 4 is the cross-sectional end view of Fig. 1 electric switch;

Fig. 5 is the parts exploded top perspective view of Fig. 1 electric switch, shows its each building block.

Referring to accompanying drawing, there is shown the electric switch 10 of one embodiment of the invention, the body 11 of switch 10 is made of normally cubical elongated upper body part 12 and base plate 13, and base plate 13 is from sealing upper body, below part 12.Switch upper body part respectively has a vertical hook portion 14 on 12 vertical both sides, supplies the usefulness that is fastened and connected fast with base plate 13.Base plate 13 has 8 holes 15, and two row switch contacts that every row is four or terminal 16 promptly pass these hole 15 installings.Each switch terminal 16 have the inner 16a of a bending lean against base plate 13 interior (on) on the side 13a, 16 of switch terminals lean against fix in position on the teat 16 that the part of base plate 13 outer (descending) side 13b cuts out with bending.The outer end 16c of switch terminal 16 exposes, and for the usefulness that is electrically connected with switch 10, this is known in the art.

Electric switch 10 also has a control member 17, the lower end of control member 17 has a hollow body 18 to be placed in the Switch main body 11, the upper end of control member is the form of button 19, and the otch 20 that passes the last longitudinal extension of upper wall 12a that is located at Switch main body part 12 protrudes from control member body 18.Body 18 its horizontal cross-sections of control member 17 are less than button 19.

Control member 18 opens wide downwards, and the elongated switch element 21 of a pair of and row arrangement is equipped with in the inside, and each element slightly is bent downwardly, the two ends 21a bending that makes progress.Interactional inverted v-shaped sheet spring 22 offsets downward each switch element 21 with its elastic force between the upper wall 18a of switch element 21 and control member body 18.The free end 22a of each sheet spring 22 is the respective end 21a of pull switch element 21 from behind, in the transverse groove of 22b embedding operation member bodies upper wall 18a bottom side, its top.

Control member 17 can slide with respect to Switch main body 11 in the vertical, thereby switch element 21 is slided on corresponding switch terminal row's 16 inner 16a.Each switch element 21 keeps electrically contacting with minimum switch terminal the inner 16 under the effect of relevant spring 22.The effect of the switch element 21 of each row switch terminal 16 is those switch terminal 16 electrical connections to adjoining by control member 17 is moved betwixt.

The position of the switch of executive component 17 is determined in the upper wall 12a synergy of sheet spring 23 and Switch main body part 12.When watching from above, the shape of the shape of sheet spring 23 and control member body 18 is suitable.Be formed with rectangular centre bore 24 usually on the sheet spring 23, button 19 promptly passes centre bore 24 and stretches out, thereby makes sheet spring 23 in place on control member body upper wall 18a.Sheet spring 23 is little curved along cross central line, forms ridge 23a upwards on its each limit.Be formed with the transverse ribs 25 of two settings along control member body upper wall 18a two ends, the two ends 23b of sheet spring 23 promptly is supported on this rib 25.

Divide each row switch terminal equally each to the imaginary plane that adjoins switch terminal 1b on, have transverse groove 2b in the bottom side of Switch main body upper wall 12a.Sheet spring 23 is clipped between control member body upper wall 18a and the Switch main body part upper wall 12a, thereby its ridge 23a can upwards be entered under the effect of sheet spring 23 elastic force own in one of them suitable groove 26, thereby determine three stable or effective position of the switch of control member 17.Under arbitrary position of the switch, each of corresponding that row switch terminal of each switch element 21 symmetrical cross-over connection is to the inner 16a of the switch terminal 16 that adjoins.

Supporting rib 25 is high that foot make sheet spring ridge 23a can leave the groove 26 that has originally taken, and moves on to when control member 17 slides into another position of the switch in the groove 26 that adjoins and need not to make control member 17 to move down to give way.Under the situation of this configuration mode, at the relative position of vertical direction, how control member 17 slides and all remains unchanged between control member 17 and the Switch main body 11.

From Fig. 5, can see the most clearly, between each of each row switch terminal is to the inner 16a that adjoins switch terminal 16, have rectangular recess 27 at the upside 13a of base plate 13.Each recess 27 both sides is extending on the horizontal rightabout beyond the inner 16a of switch terminal.Parting bead 28 stands the base plate upside 13a between two row switch terminals 16, thereby each of its both sides separated adjoining the inner 16a of switch terminal.Parting bead 28 opposite direction extend each row switch terminal first with the inner 16a of the most last switch terminal outside.

Be understood that, recess 27 and parting bead 28 prolonged on vertical or horizontal in fact respectively or extended base plate 13 at each to adjoining the surperficial path of inner surface 13a between the inner 16a of switch terminal.The surface path is once prolonging the possibility that just can avoid or reduce to adjoin generation undesirable electric spark, electric arc or flashover between the inner 16a of switch terminal.This molding surface can reach with any alternate manner, for example, makes rib or gets the parallel slot of a series of tortuous or castellated cross sections.

The base plate 13 of this specific embodiment is made by urea resin or phenolic resins molding, and this material is particularly suitable for the meticulousr part of molded surface.In addition, this strength of materials is enough big, not only anti-electricity but also heat-resisting.Last Switch main body 12 is made by having necessary flexible plastics, particularly makes and hooks together part 14 and can fasten to fast on the base plate 13 so that go up Switch main body 12.Be understood that,, promptly make, thereby significantly reduced danger by Switch main body 11 leakages of current or electric shock by urea or phenolic resins and plastics because Switch main body 11 made by electrical insulating material fully.

So far, only introduced content of the present invention by way of example, do not breaking away from the present invention under the prerequisite of the described scope of this specification appending claims, those skilled in the art can carry out various corrections and/or change to the foregoing description.

Claims

1. electric switch, comprise a body, this Switch main body has a body wall, described body wall is supporting a plurality of switch terminals, each described switch terminal passes body wall to the body wall outside from the body wall inboard, dispose movable conductive on-off element in the body, and the control member that supports by body, make switch element can move on to the primary importance that electrically contacts with two described switch terminals selectively in view of the above, and move on at least one second place that disengages on electric with described two switch terminals, it is elongated to it is characterized in that the inboard shape of body wall between described two switch terminals is processed into the surperficial path that makes between them.

2. electric switch as claimed in claim 1 is characterized in that, the inboard of described body wall between described two switch terminals is formed with a recess.

3. electric switch as claimed in claim 1 is characterized in that, is formed with a projection that stretches out from the inboard of body wall between described two switch terminals.

4. electric switch as claimed in claim 2 is characterized in that, described recess extends outside described two switch terminals along the opposite direction of imagination line of separating described two switch terminals.

5. electric switch as claimed in claim 3 is characterized in that, described projection extends outside described two switch terminals along the opposite direction of imagination line of separating described two switch terminals.

6. electric switch as claimed in claim 1, it is characterized in that, its described switch terminal has two rows, whenever drain into rare two described switch terminals, wherein the inboard of body wall between described at least two switch terminals is provided with recess, and the body wall inboard of body wall between described two row switch terminals is provided with projection.

7. electric switch as claimed in claim 1 is characterized in that it is tabular that body wall is, and switch element can slide on the inner that switch terminal exposes.

8. as the described electric switch of above-mentioned each claim, it is characterized in that the described shape of the inboard of described body wall between described two switch terminals is extended described two switch terminals along the rightabout of the imagination line of separating described switch terminal.