CN101740257A

CN101740257A - Electrical appliance i.e. switch

Info

Publication number: CN101740257A
Application number: CN200910211538A
Authority: CN
Inventors: M·达科尔; R·韦尔涅
Original assignee: Legrand SNC; Legrand France SA
Current assignee: Legrand SNC; Legrand France SA
Priority date: 2008-11-06
Filing date: 2009-11-04
Publication date: 2010-06-16
Anticipated expiration: 2029-11-04
Also published as: MX2009011232A; BRPI0904646A2; CR11077A; FR2938113A1; FR2938113B1; CO6280076A1; CN101740257B

Abstract

An electrical appliance has a fixed contact (13, 14), a conducting brush (15) comprising a central body (26) being articulated the fixed clevis (12) and having a first surface (27) facing the fixed contact and a second surface (28) facing the opposite direction, two arms (40A, 40B) projected respectively from the surfaces (27, 28), and an operating unit for pushing the conducting brush towards one of two stable positions, wherein one arm is provided with a movable contact (17, 18), a most part of surface (46) of the first arm (40A) connected with the second surface (28) of the central body faces to the opposite direction of the fixed clevis, and the most part of surface (47) of the second arm (40B) connected with the first surface (27) of the central body faces to the opposite direction of the fixed clevis .

Description

Electric device as switch

Technical field

The present invention relates generally to electric device, its type is to have the fixed contact that at least one is electrically connected with one first splicing ear, a hold-down support that is electrically connected with one second splicing ear, one hinged and have a conduction brush of at least one armature contact with described hold-down support, and one be suitable for the control member that cooperates with described conduction brush, brush being pushed in two settling positions one or another, two positions are respectively described armature contact recline a primary importance of described fixed contact and the second place that described armature contact leaves described fixed contact.

Background technology

People have been familiar with this type of electric device, and conduction brush is wherein formed by cutting and folding metal tape, and this makes that their manufacturing cost is lower.

This known brush comprises the centerbody hinged with described bearing, bearing have towards the first surface of described fixed contact and with described fixed contact opposed second surface, and two arms, each arm are outstanding from a surface of described centerbody respectively.Each arm has a root along less second section of the flat principal piece of a respective side edges of centerbody (make and can only see one of them side from hold-down support) and, and second section also is flat, and has a described armature contact.This root of second section principal piece towards the side end of bearing, and in brush, extend (make and can only see the wherein one side that has described armature contact) from hold-down support transverse to principal piece.

Summary of the invention

The objective of the invention is a kind of like this electric device, the manufacturing cost more cheap and the performance of its conduction brush improve.

For this reason, the present invention proposes a kind of electric device, and it has:

-at least one fixed contact is electrically connected with one first splicing ear;

-one hold-down support is electrically connected with one second splicing ear;

-one conduction brush that forms by cutting and folding metal tape, it has:

-one centerbody is hinged on the described hold-down support, and described centerbody has towards first surface of described fixed contact with towards a second surface opposite with described fixed contact;

-two arms, each arm are outstanding from a described surface of described centerbody respectively, and wherein at least one arm has an armature contact; And

-one control member, be suitable for cooperating with described centerbody, described brush being pushed in two settling positions one or another, two positions are respectively described armature contact the recline primary importance of described fixed contact and the second place that described armature contact leaves described fixed contact;

It is characterized in that, the surface of the first arm that joins with the second surface of described centerbody most of at least towards the direction opposite with described hold-down support, and the surface of second arm that joins with the first surface of described centerbody is most of at least towards the direction opposite with described hold-down support.

Compare with known brush, the brush that electric device of the present invention has can make the waste material of the cutting of metal tape minimize.Therefore, the optimization of this effective area percentage makes by using an area to reduce the rectangular band of about 25% (so quantity of material minimizing), can obtain a brush that scale is similar.

In its plane configuration, two arms extend by side opposing parallel ground, and therefore after their launch, the major part on the surface of first (or second) arm that joins with second (or first) surface of centerbody is towards the direction opposite with hold-down support.

This special shape of brush also has the advantage of the fracture of being convenient to little adhesion that can form between fixed contact and armature contact, forms when this sticks in fixed contact slightly and contacts with armature contact, and therefore causes closing of circuit.

When this adhesion occurs, and user's manipulation operations member is so that during the brush swing, the create antagonism reaction force that moves of the arm that has armature contact of this adhesion.In known brush, the orientation on the surface (root is on centerbody) of the flat principal piece of arm is parallel with this reaction force, and therefore this arm has big crooked inertia modulus, in other words has certain rigid.

On the contrary, in the brush that electric device of the present invention had, the most orientation on surface of arm that has armature contact is vertical with reaction force, and therefore crooked inertia modulus is much smaller, and in other words, this arm has certain flexibility.

Therefore, under the effect of this power, brachiocylloosis has the trend of armature contact band to the hold-down support direction, therefore produces a shearing force between fixed contact and armature contact, causes instantaneous (or very fast) fracture of adhesion.

The brush that electric device of the present invention had can also reduce the user for disconnecting the power that this adhesion need apply.

For implementing reason simply and easily, according to preferable feature:

-described centerbody has the inverted T-shaped profile, and to have a flat principal piece and two also be flat lateral protrusion;

The root of-each described arm is positioned at the end relative with described bearing of a lateral protrusion of described centerbody;

-described projection is extended in the both sides on the plane that described principal piece forms, and each projection forms identical inclination angle with described principal piece, so they are parallel to each other;

-each described arm has a described armature contact, and described inclination angle makes each described armature contact be centered on the mid-plane of described principal piece;

-each described arm has the first curved elbow section, forms the interior angle of concave surface towards described hold-down support;

-described interior angle is between 70 ° to 90 °;

-each described arm has second section of flat a, elongation, is connected with described first section far-end by its near-end;

Described second section of-at least one described arm has described armature contact;

-each described arm has one flat the 3rd section, and other its near-end is connected with described second section far-end along a transverse line, forms a concave surface towards second interior angle opposite with described bearing;

Described the 3rd section of-at least one described arm has described armature contact;

-described second interior angle makes when described armature contact reclines described fixed contact, have described armature contact described the 3rd section parallel with the bearing that has described fixed contact;

-described hold-down support has the center girth member of a V-arrangement profile;

-each described projection has a protruding pin, to stop the translation of the described relatively center of described brush girth member.

For being convenient to the brush cutting and the better reason of safety in utilization, according to other preferred feature:

-described electric device has the cylinder-piston on the spring that is fixed on the control member mechanical connection, described centerbody also has a flat principal piece, its engaged at end relative with described bearing is in the otch of described piston, and the bottom of described otch leans described section the straight sided relative with described bearing;

-described otch has the V-arrangement profile;

-described spring is installed in the hollow pillar with the rigidly connected driver of described control member.

It may be noted that it is not to form or/and not from the electric device of two side-prominent arms of centerbody two from cutting and folding metal tape that above-mentioned back three features can be used to conduct electricity brush.

Description of drawings

Can understand the present invention and advantage thereof by following better only as an example and with reference to the description that accompanying drawing provides, in the accompanying drawing:

-Fig. 1 is the vertical view according to electric device of the present invention;

-Fig. 2 is the part elevation figure of Fig. 1 electric device;

-Fig. 3 is the stereogram of seeing from the control member direction of the conduction brush of Fig. 1 electric device;

-Fig. 4 conducts electricity the stereogram that the hold-down support direction of brush sees from Fig. 3;

-Fig. 5 is the front view of the conduction brush of Fig. 3;

-Fig. 6 is the vertical view of the conduction brush of Fig. 3;

-Fig. 7 is the vertical view of cutting metal band that therefrom obtains the conduction brush of Fig. 3;

-Fig. 8 is a detailed perspective view, and the conduction brush of Fig. 1 electric device and the hinged region between the driver are shown;

-Fig. 9 is that Fig. 3 conducts electricity similarly the scheming with Fig. 3 an of modification of brush.

Embodiment

Electric device shown in Fig. 1,2 is the type of switch, is Reciprocative switch here.This switch has conduction brush 15 (Fig. 2) and two

fixed contacts

13 and 14 on the shell 10 (Fig. 1) of an insulating material, control member 16, the hold-down support 12 that is hinged on conduction itself.

Conduction brush 15 can alternately be in two settling positions under the control of control member 16:

-one primary importance shown in Figure 1, in this position, by the first contact particle 17, brush first fixed contact 13 that reclines, and leave second fixed contact 14;

-one unshowned second place, in this position, by the second contact particle 18, brush second fixed contact 14 that reclines, and leave first fixed contact 13.

Two

contacts

13 and 14 have a round boss silver or that contain silver metal, and this boss is additional boss also.Each boss is symmetrically located at the both sides of hold-down support 12.This hold-down support is connected with a

splicing ear

20,21 or 22 that has the hole separately with fixed contact, so that they are connected with an electric lead.In the embodiment shown in Figure 2, hold-down support 12 and contact 13,14 and their splicing ears separately are connected as a single entity.

According to a unshowned modification, fixed contact constitutes and the different part of splicing ear of being correlated with their, and suitably is electrically connected with these splicing ears.

According to another unshowned modification, splicing ear is different type, and for example tongue piece or other type can be carried out with the direct joint of associated conductor or be connected fast.

In addition, for the use of the switch of simple types,

terminal

21 or 22 and corresponding

fixed contact

13 or 14 be omitted or do not use.

According to the present invention, hold-down support 12 has the center girth member 25 of a V-arrangement profile, with respect to the axis horizontal expansion that connects two

fixed contacts

13 and 14.

Illustrate respectively as Fig. 3 to 6, conduction brush 15 is parts that obtain from suitable cutting and a folding rectangular metal band (Fig. 7).It has a centerbody 26 and two at two of centerbody 26 side-

prominent arm

40A and 40B, and arm has

contact particle

17 and 18 in end separately.

Like this, to have a flat principal piece 30 and two also be flat

lateral protrusion

35A and 35B to the centerbody 26 with inverted T-shaped profile.Centerbody is pivoted in the girth member 25, and its first surface 27 is towards arm 40A (with fixed contact 13), and its second surface 28 is towards arm 40B (with fixed contact 14).

Therefore, profile is that the principal piece 30 of rectangle respectively has a straight sided 33,34 at two vertical end; Side 34 constitutes the pivotal axis (Fig. 4) of brush 15 in center girth member 25.

The root of two projection 35A that also have a square overall profile and 35B is respectively along

fold line

36A, 36B, from side 34 beginnings of section 30 and be in about 1/3rd of its height.They extend in the both sides on the plane that section 30 forms, and form identical inclined angle alpha with section, thus they (Fig. 6) parallel to each other.

Angle α is approximately 165 ° here, makes (Fig. 5,6) on the mid-plane 37 of two

movable contact particles

17 and 18 sections of being centered in 30.In unshowned modification, arm is shorter, and angle α is littler, and perhaps opposite, arm is longer, and angle α is bigger.

In addition, in order to stop the translation of brush 15 relative girth members 25, protruding pin 38A, a 38B are outstanding from each

projection

35A, 35B at

corresponding folding line

36A, 36B place.

Each

side arm

40A, 40B from centerbody 26 begin to have one first

curved elbow section

41A, 41B, with section 41A, the 41B width the is identical flat second rectangular section 42A, a 42B with than

section

41A, 41B with 42A, 42B are slightly wide and also be flat third party's shape section 43A, a 43B, make it outstanding a little in brush 15.

The end relative that first curved elbow section 41A, the 41B is connected to

projection

35A, 35B by its near-end with hold-down support 12, and form an internal angle beta (Fig. 2), be about 80 ° here, and concave surface is towards bearing 12.

The second

rectangular section

42A, 42B are connected to the far-end of bending

elbow section

41A, 41B by its near-end, and extend to the direction of fixed

contact

13,14.

(it has

activity contact particle

17,18 silver or that contain silver metal for the

3rd section

43A, 43B, to cooperate with fixed contact 13,14) be connected to the far-end of

rectangular section

42A, 42B along

transverse line

45A, 45B by its near-end, and forming an interior angle γ (being about 170 ° here), its concave surface is towards the direction (Fig. 3 and 5) opposite with hold-down support 12.

This angle γ makes when

movable contact particle

17,18 reclines fixed

contact

13,14,

section

43A, 43B and the bearing that has

contact

13,14 parallel (Fig. 2).

In addition, as shown in figs. 1 and 6, the major part (section of being equivalent to 42A and 43A here) on the surface 46 of the arm 40A that joins with the second surface 28 of centerbody 26 is towards the rightabout of hold-down support 12.

Equally, the major part (section of being equivalent to 42B and 43B here) on the surface 47 of the arm 40B that joins with the first surface 27 of centerbody 26 is towards the rightabout of hold-down support 12.

In the plane configuration of brush shown in Figure 7 15 (promptly after the metal tape cutting but before the folding of arm and expansion operation), two

arm

40A, 40B extend on the extended line of

projection

35A, 35B and in the both sides of section 30 parallel to each other.

The plane configuration that is the cross extension with the arm of traditional brush in the centerbody both sides is compared, and it is minimum that this brush 15 can be reduced to the loss amount of material.Therefore, the brush 15 that a rectangular band that reduces from size obtains has obtained about 25% area and the therefore saving of material when having kept identical working motion and environment.

The three-dimensional configuration that carries out the transition to brush 15 from flat configuration is realized in the following manner.

The first step is, carries out the folding of two

projection

35A and 35B in the both sides of section 30 according to angle α.

Then, each

arm

40A and 40B being launched in the both sides of centerbody 26, is curved elbow section 41A and the 41B of β to form interior angle.

At last, the end that has

armature contact

17,18 of each

arm

40A, 40B is slightly folding to the direction of straight sided 33, to form

fold line

45A, 45B and

section

42A, 42B and 43A, the 43B that interior angle is γ.

Certainly, as modification, the order of these steps can change, and does not change the last form of brush.

The drive unit of brush 15 is described now.

The end relative with side 34 of section 30 is suitable for cooperating with a driver 54, and driver is rigidly connected on the control member 16, and has 53, one helical springs 52 of a hollow pillar and be installed in wherein.

One end of the cylinder-piston 51 of an insulating material is fixed on the spring 52, and its other end has the otch 50 of a V-arrangement profile, this otch is bonded on the principal piece 30, make on the straight sided 33 of the bottom section of resting on 30 of this otch 50, and spring 52 is compressed.

When the operator does the time spent to control member 16, piston 51 drives section 30 swings, therefore drives brush 15 swings, and brush carries out the transition to another settling position from its settling position.

When

activity contact particle

17,18 contacts fixed

contacts

13,14 and causes closing of circuit, may produce electric arc, and between these two contacts, form little adhesion.

The specific formation of conduction brush 15 makes and can more easily disconnect this adhesion slightly.In fact, when the user of electric device 1 does the time spent to control member 16 again, adhesion causes a kind of resistance to the motion of brush 15, causes having the arm 40A of

movable contact particle

17,18, the strain of 40B, and

movable contact particle

17,18 is slided towards hold-down support 12.

Compare with traditional harder brush, brush 15 can make the crooked much bigger of

arm

40A and 40B, and this produces a shearing force between

activity contact particle

17,18 and fixed

contact

13,14, causes adhesion instantaneous (or very rapidly) fracture.Like this,

arm

40A, 40B recover its original form, and (

movable contact particle

17,18 has a circular path) proceeded in the motion of brush 15.

A modification of the jockey between brush and brush and the control member is described referring now to Fig. 9.

For common brush part (centerbody 26 ' projection 35 ' A, 35 ' B and arm 40 ' A, 40 ' B), used identical figure notation, and increased an apostrophe " ' ".

Brush 15 ' be with different of brush 15, its principal piece 30 ' extend towards control member by a semicircle plush copper 60.

Be that with the brush 15 ' driver that cooperates and the difference of driver 54 it does not have as 51 piston.Therefore, its spring and section 30 ' side 33 ' directly contact, and the part of plush copper 60 extend in this spring.

The enforcement of this modification pay particular attention to brush 15 ' cutting, with avoid side 33 ' on have machined burrs, these burrs may cause spring out of turn the section of being hooked on 30 ' on.

According to other unshowned modification, the 3rd section that has armature contact has different profiles, as rectangle, and/or width is identical with the width of second rectangular section.

According to another unshowned modification, each arm only has a flat extension that has movable contact particle after curved elbow section.

In addition, in order to use the simple type switch, one of them movable contact particle omits or does not use.

According to different situations, many other modification can be arranged, the embodiment that describes and illustrate above therefore the invention is not restricted to.

Claims

1. electric device comprises:

-at least one fixed contact (13,14) is electrically connected with one first splicing ear (21,22);

-one hold-down support (12) is electrically connected with one second splicing ear (20);

-one conduction brush (15 that forms by cutting and folding metal tape; 15 '), it has:

-one centerbody (26; 26 '), be hinged on the described hold-down support (12) described centerbody (26; 26 ') have a first surface (27) and one towards described fixed contact (13) towards with described fixed contact (13) opposed second surface (28);

-two arms (40A, 40B; 40 ' A, 40 ' B), each arm are respectively from described centerbody (26; 26 ') a described surface (27,28) outstanding, at least one described arm (40A, 40B; 40 ' A, 40 ' B) has an armature contact (17,18);

-one control member (16) is suitable for and described centerbody (26; 26 ') cooperate, with described brush (15; 15 ') push in two settling positions one or another to, two settling positions are respectively the recline primary importance of described fixed contact (13,14) of described armature contact (17,18), and described armature contact (17,18) leaves the second place of described fixed contact (13,14);

It is characterized in that, the first arm that joins with the second surface (28) of described centerbody (26,26 ') (40A, 40 ' A) surface (46) most of at least towards with the opposite direction of described hold-down support (12), and with described centerbody (26; 26 ') the second arm (40B that joins of first surface (27); 40 ' B) surface (47) most of at least towards with the opposite direction of described hold-down support (12).

2. electric device as claimed in claim 1 is characterized in that, described centerbody (26; 26 ') have the inverted T-shaped profile, and have a flat principal piece (30; 30 ') and two also be flat lateral protrusion (35A, 35B; 35 ' A, 35 ' B).

3. electric device as claimed in claim 2 is characterized in that, each described arm (40A, 40B; 40 ' A, 40 ' B) root are positioned at described centerbody (26; 26 ') lateral protrusion (35A, a 35B; 35 ' A, 35 ' B) with the relative end of described bearing (12).

4. electric device as claimed in claim 3 is characterized in that, described projection (35A, 35B; 35 ' A, 35 ' B) is by described principal piece (30; 30 ') extend the both sides on the plane that forms, and each projection and described principal piece (30; 30 ') form an identical inclination angle (α), thus be parallel to each other.

5. electric device as claimed in claim 4 is characterized in that, each described arm (40A, 40B; 40 ' A, 40 ' B) has a described armature contact (17,18), and described inclination angle (α) makes each described armature contact (17,18) be centered in described principal piece (30; 30 ') mid-plane (37) on.

6. as the described electric device of one of claim 1 to 5, it is characterized in that each described arm (40A, 40B; 40 ' A, 40 ' B) has one first curved elbow section (41A, 41B), forms the interior angle (β) of concave surface towards described hold-down support (12).

7. electric device as claimed in claim 6 is characterized in that, described interior angle (β) is between 70 ° to 90 °.

8. as claim 6 or 7 described electric devices, it is characterized in that each described arm (40A, 40B; 40 ' A, 40 ' B) has an elongation, flat second section (42A, 42B), is connected by the far-end of its near-end with described first section (41A, 41B).

9. electric device as claimed in claim 8 is characterized in that, described second section of one of them described arm has described armature contact.

10. electric device as claimed in claim 8 is characterized in that, each described arm (40A, 40B; 40 ' A, 40 ' B) has one flat the 3rd section (43A, 43B), be connected with the far-end of described second section (42A, 42B) along a transverse line (45A, 45B) by its near-end, form one second interior angle (γ), its concave surface towards with the opposite direction of described bearing (12).

11. electric device as claimed in claim 10 is characterized in that, one of them described arm (40A, 40B; 40 ' A, 40 ' B) described the 3rd section (43A, 43B) have described armature contact (17,18).

12. electric device as claimed in claim 11, it is characterized in that, described second interior angle (γ) makes that described the 3rd section (43A, the 43B) that has described armature contact (17,18) is parallel with the bearing that has described fixed contact (13,14) when described armature contact (17,18) reclines described fixed contact (13,14).

13., it is characterized in that described hold-down support (12) has the center girth member (25) of a V-arrangement profile as the described electric device of one of claim 1 to 12.

14. electric device as claimed in claim 13 is characterized in that, each described projection (35A, 35B; 35 ' A, 35 ' B) has a protruding pin (38A, 38B), is used to stop the translation of described brush (15,15 ') described relatively center girth members (25).

15. as the described electric device of one of claim 1 to 14, it is characterized in that, it has the cylinder-piston (51) on the spring (52) that is fixed on described control member (16) mechanical connection, described centerbody (26) also has a flat principal piece (30), its engaged at end relative with described bearing (12) is in an otch (50) of described piston (51), and the bottom of described otch (50) leans a straight sided (33) relative with described bearing (12) of described section (30).

16. electric device as claimed in claim 15 is characterized in that, described otch (50) has a V-arrangement profile.

17., it is characterized in that described spring (52) is installed in the hollow pillar (53) with the rigidly connected driver of described control member (16) (54) as claim 15 or 16 described electric devices.