CA1069964A - Miniature relay with bearing supports associated with the housing - Google Patents
Miniature relay with bearing supports associated with the housingInfo
- Publication number
- CA1069964A CA1069964A CA250,016A CA250016A CA1069964A CA 1069964 A CA1069964 A CA 1069964A CA 250016 A CA250016 A CA 250016A CA 1069964 A CA1069964 A CA 1069964A
- Authority
- CA
- Canada
- Prior art keywords
- armature
- housing
- yoke
- piece
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/24—Parts rotatable or rockable outside coil
- H01H50/26—Parts movable about a knife edge
Abstract
ABSTRACT OF THE DISCLOSURE
A relay structure especially for miniature relays in which the armature part is held in place with respect to the electromagnet by means of shoulder pieces projecting within the relay housing. The housing and shoulder pieces may be made of a thermally softenable material, such as a "thermoplastic", so that the assembly may be heated and mechanically deformed to adjust clearances as a part of the final assembly process. Two versions of a flap or leaf spring for extra retention of the armature part are shown.
A relay structure especially for miniature relays in which the armature part is held in place with respect to the electromagnet by means of shoulder pieces projecting within the relay housing. The housing and shoulder pieces may be made of a thermally softenable material, such as a "thermoplastic", so that the assembly may be heated and mechanically deformed to adjust clearances as a part of the final assembly process. Two versions of a flap or leaf spring for extra retention of the armature part are shown.
Description
~1~699~
W. Min~s 14/17 (Revised) -IMPROVED MINIATU~E RELAY WITH BEARING SUPPORTS
ASSOCIATED WITH THE HOUSING
BACKGROUND OF THE INVENTIOW ;:
. . ~
Field of the Invention . _ The present invention relates to relays generally and more specifically, to miniature relays, the moving parts o~ which are supported from within the relay housing.
Description of the Prior Art Miniature relays employing various magnet arrange~
ments are known, for example, from German Published Patent Application 1,292,752 and 2,253,456. German Petty Patent 7,122,599 shows a relay in which the contact spring also provides a lifting force in cooperation with a clip on the yoke. In these prior art configurations, however, an ~;
unsolved problem remains in respect 'to retention of the loosely inserted parts of the magnet system inside a casing.
It is particularly important that a defined reproducible position of the parts in relation to one be provided to insure satisfactory and relIable functioning o~ such relays.
None of this prior art satisfactorily addresses the approach to low cost, easy manufacture of a relay af~orded by the presellt invention. ;~
The manner in which the present invention deals with prior art problems will be evident as this description pxoceeds. ;
SU~ARY OF THE INVENTION
It may be said to have been the general objective of the present invention to provide a structure in which ~, .
~6~164 W. Minks 14/17 (Revised) the parts of both the magnet and the switch system assume a well-defined position in relation to one another with the aid of simple means.
The relay, according to the invention, consists of a minimum number of parts capable of being assembled in a simple way wi~hout requiring any further adjustment. Owing -~
to miniaturization, there is still to be sclved the addi-tional problem of efectively actuating a small armature in relation to a small yoke.
0 In a miniature re~ay of the type mentioned herein-before, the desired results are achieved in that shoulders are provided ins}de the housing for retaining in position the parts of the magnet system and ~or restricting the freedom of movement of the tilting armature in relation to the yoke. In an advantageous manner, these shoulders may be designed in such a way that various parts can be used for performing different functions, fGr example, a standard part may be used to support the armature, and in another location for supporting the yok The shoulders may be designed as different kinds o~ bosses or projections inside the housing which may also be combined to form one piece. -It is also advantageous to form the housing of two half shells inside which the shoulders are arranged symmetrically. The halves of the housing are designed mirror-symmetrically and therefore, may be identical parts.
As a further advantageous feature, a resilient flap ar leaf spring may be incorporated for further restricting the freedom of movement of the tilting armature in direction toward the quiescent position with the area of clearance ;
between the shoulders.
, :. . :, ~ . . , 6~6~
W. Minks 14/17 (Revised) Still further, adjustment of operative clearances and limits can be achieved by thermal deformation carried out after assembly of the magnet system in the housing.
To su~marize the invention, it may be said to provide a relay structure comprising an electromagnet assembly including a coil about a generally axial magnetic core piece and a yoke piece providing a pair o~ magnetic poles at a first end of this electromagnet assembly in the form of the generally ~lat end~ o~ the yoke and core pieces, the yoke piece having an outer edge at its first end, and ~.
further ~ein~ magnetically conne~ted to the core at the :~
second end of the ele~txomagnet assemblyi a generally L-shaped armature piece plated at its first end with the ~ertex of its obtuse interiox angle in contact with the : -yoke piece outer ed~el~a fixst le~ o:E the armature ~:
being located so as to be ma~netically pulled to the core piece thereby tilting the armature about the vertex; ~:.
a housin~ containin~ the electroma~net assembly ~nd the ~ ~
armature piece; and me~ns includin~ a pair of shoulder pieces located within the hou$ing, one o~ these shoulder .
pieces beaxing against the outside surface of the . :` .:
armature opposite the ~ertex and the other bearing agaînst ~ .
the yoke adjacent the second end, thereby to provide axial constrain~ fox the assembl~ comprisin~ the electromagnet ;~
assembly and the armatuxe, and also providin~ preservation of the relative ~xial positions of the ~oke and armature~
Ad~antages and structural variations of the in~ention will be explained with.reference to examples .
illustxated in Figs. 1 through 4 o~ the accompan~ing drawing~.
~ ~ . - . ,, . . : .:
3~
W. Minks 14/17 (Revised) BRIEF DESCRIPTION OF THE DRAWINGS
Fig, 1 iS a sectional view, showing the construction, according to the invention, of a miniature relay buil~
into a housing.
Fig. 2 shows a particular type of tilting armature retaining arrangement for use in the device of FigO 1.
Fig. 3 is a sectional view of a relay of the double- -throw type including an alternative form of resilient means for biasing the armature into one of the two positions.
Fig. 4 is a ~et~il of a variation in the structure of the resilient means of Fi~. 3.
.:~
DESCRIPTIC)N OF TH~ PREFERRED EMBODIMENT :, :
In Fig. 1, miniature relay i6 assembled in a housing 10. The relay magnetic actu~tion components (electroma~net~ include yoke 11 with a coil windin~ 12. -The yoke 11 act~ally includes a central core and a wrap-around yoke piece of magnet material as shown, generally referred to as simply a voke. On the right side as ~ -drawn, the yoke is opened in a U-shaped ~ashion, and thereon a tilting armature 13 is supported which, upon actuation, is drawn to the free yoke ends of the yo~e to complete the magnetic circuit and, simultaneously, actuates a contact leaf spring member 19.
,;
-4a- ~-~ 6996~
W. Minks 14/17 (Revised) A lever arm poxtion of 13 arranged freely over the yoke engage~ lg for this pu~pose~ ~oth the contacts and the coil terminals may be brought out, typically by plug-in pins 20 on the bottom side of the housing.
- The interior vertex of the L-shaped tilting armature 13 is rotatable about a yoke edge 14 serving as the axis (pivotal point) of rotary (tilting) movement. On the outside opposite 14 and the armature vertex, the tilting armature 13 is provided with a rounded convex surface in the area of 16. During movement of the tilting armature 13, this convex armature surface moves along a circular track against support and alignment member 15. Both the yoke 11 with its coil 12 and armature 13 must be allowed some mov-ability which, however, must occur repeatably with respect to the initial position.
.
With respect to translationaL mo~ement of the yoke 11 in response to movement of the tilting armature 13, shoulders 15 and 17 are provided inside the housing 10 ;
according to the invention. The shoulder 15 is provided with a concave surface curvature 16 corresponding to the outside convex curvature of the tilting armature 13, thus resisting the movement of 13 as little as possible. In view of the convex supporting edge 18 of the shoulder 17 effec~ive in one area, the magnet system is only capable of moving within a narrow range of clearance, however, what movement of the tilting armature 13 and the yoke 11 does occur, occurs contemporaneously. ' Owing to the fact that the paths of the relative movements of both the tilting armature 13 and the yoke 11 do not necessarily occur in the same direction, the tilting armature is always positioned in a comparatively different ~S- ;
~069964 w. Minks 14/17 (Revised) initial position, the weight of the magnet system parts being insufficient to establish a definite initial position.
As is shown in E'ig. 1, the shoulders 15 and 17 may be in fact the same part. At 17, a different part 18 of the curvatures 16 and 18 is employed vis-a-vis that used at 15.
A symmetrical construction of the shoulders is possible and advantageou~, further because the housing may Likewise consist of symmetrical (even identical) half-shell shaped parts.
Accordingly, for manufacturing miniature relays according to the invention, a single housing part (half shell) may be fabricated with the corresponding shoùlders integral therein. These parts are readily produced, a~ for example, by injection moulding. Two such parts are simply assembled to foxm one relay housing with the yoke, coil and armature loosely placed therein~ Joining of the housing halves may be effected by well known methodsO
As a further advantage of the invention, it has proved advantageous to form a flap 21 for additionally pressing the tilting armature 13 against its bearing edge at 14 (see Fig. 2 This flap is in ~uch a way pre tensioned (biased) that it, ' ;~
wit~out the armature, would come to lie in the position as ,-~
indicated by the dot and dash lines shown in Fig. 2. In ¦`
this way it is possible to take into account the necessary freedom of movement of the tilting armature which is required for every actuation. After each actuation, the tilting armature 13 is returned repeatably by the resilient flap 21 to a predetermined normal position. The flat 21 may be ¦:
attached to one part of the housing or to an additional cover member, and may consist of a resilient plastic material.
. . ' ' ~ .
1~ 64 W. Minks 14/17 ~Revised) Referring now to Fig. 3, the double throw relay illustrated employs substantially the same basic par~s as in the relay of Fig. 1, including the coil 12, yoke 11, case 10, shoulder 15 and 17, armature 13 and contact spring arm 19. In addition, Fig. 3 includes contact mounting 24 with contact 24a thereon. To accommodate additional moving contact 27, the leaf spring arm 19 is somewhat elongated as compared to Fig. 1, the latter having only the single fixed contact 25a on contact mount 25, opposite moving contact 26.
The configuration of Fig~ 3 significantly enhances the reproducibility of the desirable switching characteristics and loca~ion of the components.
The tilting armature 13 operates against the bearing point 14 on the yoke 11 in essentially the same manner as in Fi~. 1. In Fig. 3, however, a leaf spring 23 is provided.
Spring 23 rests against the inside of the housing 10 as shown and is connected (by any of the known techniques) to~
the arm of 13 at or near its end which supports the insulating actuati~g (plunger) membar 22.
Since the inherent resilience of spring 23 is such as to exert a force tending to straighten itself, there is an inherent force tending to keep the plunger (actuator~
22 in touch with 19, but this force is small compared to the spring action of 19 holding 25a and 26 toge-ther.
The entire relay assembly of Fig. 3 is constructed in such a way that armature 13 can be positioned loosely inside casing 10 together with the electromagnet subassemhly~
The positions of the parts are then secured by 23, which tends to retain itself against the inside of housing 10 ,, :
- ~)6996~
W. Minks 14/17 (Revised) to exert a force just sufficient to keep the actuating member (plunger) in contact with contact spring 19, and finally to retain the armature in contact with point 14 of the yoke.
It should be emphasized that the force of 23, keeping 22 in contact with 19 in the quiescent position is not sufficient to disturb the contact between 25a and 26 (as illustrated in FigO 3)O
When the coil 12 is energized, the armature 13 is ; ~;
drawn into a magnetic circuit closure position ~as illustra~ed in Fig. 1), against the forces of 19 and 23, the latter being relatively small compared to the armature return action provided by 19 when coil 12 is deenergized. It will be noted that in the condition of coil 12 energi~ation, contact is effected between 24a and 27 of Fig. 3.
The spring 23 considerably improves the performance of the relay in shock and vibration environments, thus -~-...~
resulting in increased stability of the magnetic attractin~ ;
forces anc~, consequently, of the overall electrical per-formance of the relay.
The spring 23 can be made of a well known spring metal, or of an electrically and magnetically non-conducting material, since it has only to perform mechanical functions. Moreover, it is conceivable for the spring to be shaped integrally as a part of the casing itself, it being then applied to the swivel armature or attached theret~. Likewise, it is possible for the spring 23 to be shaped integrally with actuating plunger 22, and mounted together with the actuating plunger to the swivel armature 13, as is shown in Fig. 4.
Such expedients provide that, in assembling the relay into , . .. . .
1069964 w. Minks 14/17 (Revised~
the casing, ~here would not be any additional loose part.
According to FigP 4, the spring 23 is preshaped to the armature 13, and is therefore readily buil~ in without requiring any further auxiliary means. The spring material itsel~ may in fact be of plastic foil~
Still further~ and especially with reference to Fig. lr it is also possible to achieve the desired freedom of movement and clearance of both the yoke 11 and the armature 13 in the built-in condition by thermally deforming ~0 the entire system while it is being actuated (cycled~ and the performance monitored. In this way curved bearing surfaces or indentations are automatically formed or modi-fied on the supporting surfaces of 15 and 17. Normally, if the aforementioned thermal deformation process is to be employed, at leas~ the parts 15 and 17 would be (preferably) made of a thermoplastic material. The housing half shells may also be of such material, especially if they are formed with integral members 15 and 17. The member l9 is of course made of conductive resilient material and the yoke parts must be of a magnetic flux-transmissive material of low retentivity.
WTO:ern ~/21/79
W. Min~s 14/17 (Revised) -IMPROVED MINIATU~E RELAY WITH BEARING SUPPORTS
ASSOCIATED WITH THE HOUSING
BACKGROUND OF THE INVENTIOW ;:
. . ~
Field of the Invention . _ The present invention relates to relays generally and more specifically, to miniature relays, the moving parts o~ which are supported from within the relay housing.
Description of the Prior Art Miniature relays employing various magnet arrange~
ments are known, for example, from German Published Patent Application 1,292,752 and 2,253,456. German Petty Patent 7,122,599 shows a relay in which the contact spring also provides a lifting force in cooperation with a clip on the yoke. In these prior art configurations, however, an ~;
unsolved problem remains in respect 'to retention of the loosely inserted parts of the magnet system inside a casing.
It is particularly important that a defined reproducible position of the parts in relation to one be provided to insure satisfactory and relIable functioning o~ such relays.
None of this prior art satisfactorily addresses the approach to low cost, easy manufacture of a relay af~orded by the presellt invention. ;~
The manner in which the present invention deals with prior art problems will be evident as this description pxoceeds. ;
SU~ARY OF THE INVENTION
It may be said to have been the general objective of the present invention to provide a structure in which ~, .
~6~164 W. Minks 14/17 (Revised) the parts of both the magnet and the switch system assume a well-defined position in relation to one another with the aid of simple means.
The relay, according to the invention, consists of a minimum number of parts capable of being assembled in a simple way wi~hout requiring any further adjustment. Owing -~
to miniaturization, there is still to be sclved the addi-tional problem of efectively actuating a small armature in relation to a small yoke.
0 In a miniature re~ay of the type mentioned herein-before, the desired results are achieved in that shoulders are provided ins}de the housing for retaining in position the parts of the magnet system and ~or restricting the freedom of movement of the tilting armature in relation to the yoke. In an advantageous manner, these shoulders may be designed in such a way that various parts can be used for performing different functions, fGr example, a standard part may be used to support the armature, and in another location for supporting the yok The shoulders may be designed as different kinds o~ bosses or projections inside the housing which may also be combined to form one piece. -It is also advantageous to form the housing of two half shells inside which the shoulders are arranged symmetrically. The halves of the housing are designed mirror-symmetrically and therefore, may be identical parts.
As a further advantageous feature, a resilient flap ar leaf spring may be incorporated for further restricting the freedom of movement of the tilting armature in direction toward the quiescent position with the area of clearance ;
between the shoulders.
, :. . :, ~ . . , 6~6~
W. Minks 14/17 (Revised) Still further, adjustment of operative clearances and limits can be achieved by thermal deformation carried out after assembly of the magnet system in the housing.
To su~marize the invention, it may be said to provide a relay structure comprising an electromagnet assembly including a coil about a generally axial magnetic core piece and a yoke piece providing a pair o~ magnetic poles at a first end of this electromagnet assembly in the form of the generally ~lat end~ o~ the yoke and core pieces, the yoke piece having an outer edge at its first end, and ~.
further ~ein~ magnetically conne~ted to the core at the :~
second end of the ele~txomagnet assemblyi a generally L-shaped armature piece plated at its first end with the ~ertex of its obtuse interiox angle in contact with the : -yoke piece outer ed~el~a fixst le~ o:E the armature ~:
being located so as to be ma~netically pulled to the core piece thereby tilting the armature about the vertex; ~:.
a housin~ containin~ the electroma~net assembly ~nd the ~ ~
armature piece; and me~ns includin~ a pair of shoulder pieces located within the hou$ing, one o~ these shoulder .
pieces beaxing against the outside surface of the . :` .:
armature opposite the ~ertex and the other bearing agaînst ~ .
the yoke adjacent the second end, thereby to provide axial constrain~ fox the assembl~ comprisin~ the electromagnet ;~
assembly and the armatuxe, and also providin~ preservation of the relative ~xial positions of the ~oke and armature~
Ad~antages and structural variations of the in~ention will be explained with.reference to examples .
illustxated in Figs. 1 through 4 o~ the accompan~ing drawing~.
~ ~ . - . ,, . . : .:
3~
W. Minks 14/17 (Revised) BRIEF DESCRIPTION OF THE DRAWINGS
Fig, 1 iS a sectional view, showing the construction, according to the invention, of a miniature relay buil~
into a housing.
Fig. 2 shows a particular type of tilting armature retaining arrangement for use in the device of FigO 1.
Fig. 3 is a sectional view of a relay of the double- -throw type including an alternative form of resilient means for biasing the armature into one of the two positions.
Fig. 4 is a ~et~il of a variation in the structure of the resilient means of Fi~. 3.
.:~
DESCRIPTIC)N OF TH~ PREFERRED EMBODIMENT :, :
In Fig. 1, miniature relay i6 assembled in a housing 10. The relay magnetic actu~tion components (electroma~net~ include yoke 11 with a coil windin~ 12. -The yoke 11 act~ally includes a central core and a wrap-around yoke piece of magnet material as shown, generally referred to as simply a voke. On the right side as ~ -drawn, the yoke is opened in a U-shaped ~ashion, and thereon a tilting armature 13 is supported which, upon actuation, is drawn to the free yoke ends of the yo~e to complete the magnetic circuit and, simultaneously, actuates a contact leaf spring member 19.
,;
-4a- ~-~ 6996~
W. Minks 14/17 (Revised) A lever arm poxtion of 13 arranged freely over the yoke engage~ lg for this pu~pose~ ~oth the contacts and the coil terminals may be brought out, typically by plug-in pins 20 on the bottom side of the housing.
- The interior vertex of the L-shaped tilting armature 13 is rotatable about a yoke edge 14 serving as the axis (pivotal point) of rotary (tilting) movement. On the outside opposite 14 and the armature vertex, the tilting armature 13 is provided with a rounded convex surface in the area of 16. During movement of the tilting armature 13, this convex armature surface moves along a circular track against support and alignment member 15. Both the yoke 11 with its coil 12 and armature 13 must be allowed some mov-ability which, however, must occur repeatably with respect to the initial position.
.
With respect to translationaL mo~ement of the yoke 11 in response to movement of the tilting armature 13, shoulders 15 and 17 are provided inside the housing 10 ;
according to the invention. The shoulder 15 is provided with a concave surface curvature 16 corresponding to the outside convex curvature of the tilting armature 13, thus resisting the movement of 13 as little as possible. In view of the convex supporting edge 18 of the shoulder 17 effec~ive in one area, the magnet system is only capable of moving within a narrow range of clearance, however, what movement of the tilting armature 13 and the yoke 11 does occur, occurs contemporaneously. ' Owing to the fact that the paths of the relative movements of both the tilting armature 13 and the yoke 11 do not necessarily occur in the same direction, the tilting armature is always positioned in a comparatively different ~S- ;
~069964 w. Minks 14/17 (Revised) initial position, the weight of the magnet system parts being insufficient to establish a definite initial position.
As is shown in E'ig. 1, the shoulders 15 and 17 may be in fact the same part. At 17, a different part 18 of the curvatures 16 and 18 is employed vis-a-vis that used at 15.
A symmetrical construction of the shoulders is possible and advantageou~, further because the housing may Likewise consist of symmetrical (even identical) half-shell shaped parts.
Accordingly, for manufacturing miniature relays according to the invention, a single housing part (half shell) may be fabricated with the corresponding shoùlders integral therein. These parts are readily produced, a~ for example, by injection moulding. Two such parts are simply assembled to foxm one relay housing with the yoke, coil and armature loosely placed therein~ Joining of the housing halves may be effected by well known methodsO
As a further advantage of the invention, it has proved advantageous to form a flap 21 for additionally pressing the tilting armature 13 against its bearing edge at 14 (see Fig. 2 This flap is in ~uch a way pre tensioned (biased) that it, ' ;~
wit~out the armature, would come to lie in the position as ,-~
indicated by the dot and dash lines shown in Fig. 2. In ¦`
this way it is possible to take into account the necessary freedom of movement of the tilting armature which is required for every actuation. After each actuation, the tilting armature 13 is returned repeatably by the resilient flap 21 to a predetermined normal position. The flat 21 may be ¦:
attached to one part of the housing or to an additional cover member, and may consist of a resilient plastic material.
. . ' ' ~ .
1~ 64 W. Minks 14/17 ~Revised) Referring now to Fig. 3, the double throw relay illustrated employs substantially the same basic par~s as in the relay of Fig. 1, including the coil 12, yoke 11, case 10, shoulder 15 and 17, armature 13 and contact spring arm 19. In addition, Fig. 3 includes contact mounting 24 with contact 24a thereon. To accommodate additional moving contact 27, the leaf spring arm 19 is somewhat elongated as compared to Fig. 1, the latter having only the single fixed contact 25a on contact mount 25, opposite moving contact 26.
The configuration of Fig~ 3 significantly enhances the reproducibility of the desirable switching characteristics and loca~ion of the components.
The tilting armature 13 operates against the bearing point 14 on the yoke 11 in essentially the same manner as in Fi~. 1. In Fig. 3, however, a leaf spring 23 is provided.
Spring 23 rests against the inside of the housing 10 as shown and is connected (by any of the known techniques) to~
the arm of 13 at or near its end which supports the insulating actuati~g (plunger) membar 22.
Since the inherent resilience of spring 23 is such as to exert a force tending to straighten itself, there is an inherent force tending to keep the plunger (actuator~
22 in touch with 19, but this force is small compared to the spring action of 19 holding 25a and 26 toge-ther.
The entire relay assembly of Fig. 3 is constructed in such a way that armature 13 can be positioned loosely inside casing 10 together with the electromagnet subassemhly~
The positions of the parts are then secured by 23, which tends to retain itself against the inside of housing 10 ,, :
- ~)6996~
W. Minks 14/17 (Revised) to exert a force just sufficient to keep the actuating member (plunger) in contact with contact spring 19, and finally to retain the armature in contact with point 14 of the yoke.
It should be emphasized that the force of 23, keeping 22 in contact with 19 in the quiescent position is not sufficient to disturb the contact between 25a and 26 (as illustrated in FigO 3)O
When the coil 12 is energized, the armature 13 is ; ~;
drawn into a magnetic circuit closure position ~as illustra~ed in Fig. 1), against the forces of 19 and 23, the latter being relatively small compared to the armature return action provided by 19 when coil 12 is deenergized. It will be noted that in the condition of coil 12 energi~ation, contact is effected between 24a and 27 of Fig. 3.
The spring 23 considerably improves the performance of the relay in shock and vibration environments, thus -~-...~
resulting in increased stability of the magnetic attractin~ ;
forces anc~, consequently, of the overall electrical per-formance of the relay.
The spring 23 can be made of a well known spring metal, or of an electrically and magnetically non-conducting material, since it has only to perform mechanical functions. Moreover, it is conceivable for the spring to be shaped integrally as a part of the casing itself, it being then applied to the swivel armature or attached theret~. Likewise, it is possible for the spring 23 to be shaped integrally with actuating plunger 22, and mounted together with the actuating plunger to the swivel armature 13, as is shown in Fig. 4.
Such expedients provide that, in assembling the relay into , . .. . .
1069964 w. Minks 14/17 (Revised~
the casing, ~here would not be any additional loose part.
According to FigP 4, the spring 23 is preshaped to the armature 13, and is therefore readily buil~ in without requiring any further auxiliary means. The spring material itsel~ may in fact be of plastic foil~
Still further~ and especially with reference to Fig. lr it is also possible to achieve the desired freedom of movement and clearance of both the yoke 11 and the armature 13 in the built-in condition by thermally deforming ~0 the entire system while it is being actuated (cycled~ and the performance monitored. In this way curved bearing surfaces or indentations are automatically formed or modi-fied on the supporting surfaces of 15 and 17. Normally, if the aforementioned thermal deformation process is to be employed, at leas~ the parts 15 and 17 would be (preferably) made of a thermoplastic material. The housing half shells may also be of such material, especially if they are formed with integral members 15 and 17. The member l9 is of course made of conductive resilient material and the yoke parts must be of a magnetic flux-transmissive material of low retentivity.
WTO:ern ~/21/79
Claims (13)
1. A relay structure comprising:
an electromagnet assembly including a coil about a generally central axial magnetic core piece and a yoke piece providing a pair of magnetic poles at a first end of said electromagnet assembly in the form of the generally flat ends of said yoke and core pieces, said yoke piece having an outer edge at said first end, and further being magnetically connected to said core at the second end of said electromagnet assembly;
a generally L shaped armature piece plated at said first end with the vertex of its obtuse interior angle in contact with said yoke piece outer edge, a first leg of said armature being located so as to be magnetically pulled to said core piece thereby tilting said armature about said vertex;
a housing containing said electromagnet assembly and said armature piece;
and means comprising a pair of shoulder pieces located within said housing, one of said shoulder pieces bearing against the outside surface of said armature opposite said vertex and the other bearing against said yoke adjacent said second end, thereby to provide axial constraint for the assembly comprising said electromagnet assembly and said armature, and preservation of the relative axial positions of said yoke and said armature.
an electromagnet assembly including a coil about a generally central axial magnetic core piece and a yoke piece providing a pair of magnetic poles at a first end of said electromagnet assembly in the form of the generally flat ends of said yoke and core pieces, said yoke piece having an outer edge at said first end, and further being magnetically connected to said core at the second end of said electromagnet assembly;
a generally L shaped armature piece plated at said first end with the vertex of its obtuse interior angle in contact with said yoke piece outer edge, a first leg of said armature being located so as to be magnetically pulled to said core piece thereby tilting said armature about said vertex;
a housing containing said electromagnet assembly and said armature piece;
and means comprising a pair of shoulder pieces located within said housing, one of said shoulder pieces bearing against the outside surface of said armature opposite said vertex and the other bearing against said yoke adjacent said second end, thereby to provide axial constraint for the assembly comprising said electromagnet assembly and said armature, and preservation of the relative axial positions of said yoke and said armature.
2. Apparatus according to Claim 1 in which said armature has a convex curved shape along said outside sur-face thereof opposite said vertex and in which said shoulder piece bearing against said convex armature surface is shaped according to a concave contour matching said convex shape.
3. Apparatus according to claim 2 in which said housing comprises two shell parts joinable at a point between the axial extremities of said electromagnet assembly contained therein, and in which said shoulder pieces are integrally mounded into said shell parts, said axial constraint being provided for said electromagnet and armature assembly when said shell parts are joined.
4. Apparatus according to claim 2 in which said shoulder pieces are identical in construction, are generally wedge-shaped in the lateral plane with two mutually normal sides and a third side contoured to be generally convex over a first portion of its length and generally concave over the remainder of its length pro-viding a contoured surface perpendicular to said two mutually normal sides, the one of said shoulder pieces bearing against said yoke at said second end of said electromagnet assembly being mounted on the inside surface of said housing such that the convex surface formed on said shoulder piece is adjacent said second electromagnet end, and the one of said shoulder pieces adjacent said electromagnet first end is mounted on the inside surface of said housing such that said concave surface formed on said shoulder piece is adjacent said armature outside surface.
5. Apparatus according to claim 1 further defined in that a resilient flap is included, said flap being anchored from said housing and arranged to apply a resilient force against said arma-ture to mechanically bias said electromagnet assembly at least axially within said housing.
6. Apparatus according to claim 1 in which at least said housing is fabricated from a material which is deformable when heated to a temperature above anticipated ambient temperatures but below any temperature which would damage other components of said relay, whereby said housing may be slightly deformed to adjust the clearance between said shoulder pieces and the parts of said electromagnet assembly.
7. Apparatus according to claim 1, further defined in that said relay structure includes a relatively flat, elongated, contact spring carrying at least one movable electrical contact, at least one fixed contact arranged to be engaged by said one electrical contact, said contact spring corresponding to first and second patterns of engagement of actuation means attached to the second leg of said armature for deflecting said contact spring to said second position when said first leg is magnetically pulled to said core piece, and including a leaf spring placed to exert a first force tending to keep said armature in contact with said yoke piece outer edge and also to provide a second force tending to keep said actuation means in contact with said contact spring when said contact spring is in said first position.
8. Apparatus according to claim 7 in which said leaf spring is attached to said armature second leg.
9. Apparatus according to claim 8 in which said leaf spring is emplaced over the outside surface of said armature at least in the area opposite said vertex and said leaf spring bears against the inside of said housing at a point of bearing opposite said armature first leg.
10. Apparatus according to claim 9 in which said leaf spring is formed of a resilient, non-conducting material which is not magnetic flux transmissive.
11. Apparatus according to claim 9 in which said actuator means comprises a plunger-like projection of insulat-ing material and said leaf spring is integrally formed there-with such that both may be simultaneously affixed to said armature second leg.
12. Apparatus according to claim 10 in which said actuator means comprises a plunger-like projection of insulat-ing material and said leaf spring is integrally formed there-with such that both may be simultaneously affixed to said armature second leg.
13. Apparatus according to claim 9 in which said leaf spring is integrally formed with the wall of said hous-ing at said point of bearing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752516502 DE2516502C3 (en) | 1975-04-15 | Miniature relay arranged in a housing | |
| DE19752541650 DE2541650C3 (en) | 1975-09-18 | 1975-09-18 | Miniature relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1069964A true CA1069964A (en) | 1980-01-15 |
Family
ID=25768767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA250,016A Expired CA1069964A (en) | 1975-04-15 | 1976-04-12 | Miniature relay with bearing supports associated with the housing |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT360113B (en) |
| BE (1) | BE851384A (en) |
| BR (1) | BR7602358A (en) |
| CA (1) | CA1069964A (en) |
| FR (1) | FR2308187A1 (en) |
| GB (1) | GB1497996A (en) |
| IT (1) | IT1059599B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2452777A1 (en) * | 1977-11-24 | 1980-10-24 | Kuke Kg Fritz | Miniaturised electromagnetic power relay - has projecting yoke and has contact block on frame and flange with terminal tags for coil |
| CH649170A5 (en) * | 1979-04-18 | 1985-04-30 | Rausch & Pausch | MAGNETIC TANK HOLDER IN A RELAY. |
| DE3335732A1 (en) * | 1983-10-01 | 1985-04-11 | Brown, Boveri & Cie Ag, 6800 Mannheim | DEVICE FOR RESETTING THE CONTACT CARRIER OF AN ELECTROMAGNETIC SWITCHGEAR, ESPECIALLY A CONTACTOR |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2217218C2 (en) * | 1972-04-10 | 1982-09-02 | Siemens AG, 1000 Berlin und 8000 München | Contact spring set for an electromagnetic card relay in flat design and method for manufacturing the same |
| DE2218494B1 (en) * | 1972-04-17 | 1973-10-11 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Electromagnetic relay |
| DK139405C (en) * | 1974-10-28 | 1979-07-16 | Danfoss As | KLAPANKERRELAE |
-
1976
- 1976-04-07 IT IT2199676A patent/IT1059599B/en active
- 1976-04-12 CA CA250,016A patent/CA1069964A/en not_active Expired
- 1976-04-14 BR BR7602358A patent/BR7602358A/en unknown
- 1976-04-15 FR FR7611174A patent/FR2308187A1/en active Granted
- 1976-04-15 AT AT277076A patent/AT360113B/en not_active IP Right Cessation
- 1976-04-15 GB GB1566976A patent/GB1497996A/en not_active Expired
-
1977
- 1977-02-14 BE BE2055665A patent/BE851384A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2308187A1 (en) | 1976-11-12 |
| BR7602358A (en) | 1976-10-05 |
| GB1497996A (en) | 1978-01-12 |
| ATA277076A (en) | 1980-05-15 |
| IT1059599B (en) | 1982-06-21 |
| BE851384A (en) | 1977-08-16 |
| FR2308187B1 (en) | 1981-08-07 |
| AT360113B (en) | 1980-12-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |