CN1189250A - Switching contact mechanism with wipe and backwipe - Google Patents

Switching contact mechanism with wipe and backwipe Download PDF

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Publication number
CN1189250A
CN1189250A CN96195064A CN96195064A CN1189250A CN 1189250 A CN1189250 A CN 1189250A CN 96195064 A CN96195064 A CN 96195064A CN 96195064 A CN96195064 A CN 96195064A CN 1189250 A CN1189250 A CN 1189250A
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CN
China
Prior art keywords
contact
contact arm
connector
ledge
arm
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.)
Pending
Application number
CN96195064A
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Chinese (zh)
Inventor
J·R·费特罗尔夫
D·K·霍勒尔
R·R·亨里
D·W·鲁普尼克
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whitaker LLC
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Whitaker LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Whitaker LLC filed Critical Whitaker LLC
Priority to CN96195064A priority Critical patent/CN1189250A/en
Publication of CN1189250A publication Critical patent/CN1189250A/en
Pending legal-status Critical Current

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Abstract

This invention relates to a make-before-break switch of the type for electrical connector, where the connector is intended to be mated with a complementary coaxial cable connector. The switching connector comprises a pair of spaced-apart, cantilevered switch contacts mounted within a dielectric housing, where such mating is between the pair of switch contacts. A unique feature hereof is that the shank portion of one of the switch contacts has a contact arm extending toward and in contact with the shank portion of the other switch contact in an unmated condition, and that the respective mating ends of the switch contacts are axially offset from one another. By this arrangement, upon mating by the complementary connector, contact is made sequentially with the mating ends and the contact arm is caused to wipe along the shank portion of the first switch contact to counter the effects of contaminants and oxides which may be present at the contact point.

Description

Have and sweep the switching contact mechanism that connects and oppositely sweep the effect of connecing
The present invention relates to a kind of switch contact, R.F switch for example, it provides a contact zone away from mating surface, can realize that sweeping of contact connects and oppositely sweep connecing, thereby avoid the oxidation and the pollution that may take place in the switch contact zone.
Sweep and connect and oppositely to sweep spreading be contact since the phase always, the main improvement of contact of the elastic cantilever of extremely limited contact area especially only is provided.Because this elastic arm is made by sheet metal usually, for example therefore phosphor bronze exists oxidative phenomena, and this can bring adverse influence to electrical contact performance.Metal oxide is normally nonconducting, and it can destroy electric continuity.In addition, the pollutant on the contact zone also can make electrical contact performance become bad.For this reason, provide a kind of sweeping to connect and oppositely sweep the device that connects, it can make the contact zone more clean.Realize sweeping connecing by complementary joggle piece, a basic skills of improving performance is provided.But,, still exist pollution problem owing between contact arm, there are a plurality of contact points.
The United States Patent (USP) 5,320,546 that has transferred the assignee has been introduced a kind of coaxial connector, and this connector has a plurality of contacts.Briefly, its contact comprises first switch contact and the second floatless switch contact, and wherein first switch contact comprises a bias piece and a deflector.This bias piece is realized the closure conversion between first switch contact and the second switch contact.Described deflector and this bias piece are installed separately, and are realized and the contacting of the pin of a complementary connector by this deflector.Connect although on the end of engagement of first switch contact, realized sweeping, can not realize sweeping connecing with the bias piece and the second floatless switch contact.Therefore, between switch contact, exist and pollute and problem of oxidation, influenced and realized between the switch arm being electrically connected reliably.
The present invention is devoted to provide the electric switch connector of a kind of communication equipment etc., and this connector and a kind of complementary coaxial cable connector pairing are used, and this matching effect produces to sweep between switch contact and connects.This connector comprises an insulation crust, and a pair of isolated cantilever type switch contact is housed in the shell.Each switch contact has a stiff end, a shank and an end of engagement, and wherein this end of engagement comprises the part of a back-flexing.The improvement characteristic of this make-before-break connector is the structure of the shank of a switch contact, and it comprises a contact arm, to the shank extension of another switch contact, and be not in contact with it under the meshing condition.In addition, corresponding end of engagement axially is provided with one by one, and when complementary connector engagement, end of engagement contacts one by one, and contact arm begins to sweep along the shank of another switch contact and connects, to exempt the dirt that forms and the influence of oxide on contact point.
Fig. 1 is to use electric connector and plane electronic installation of switching connector of the present invention, and for example the decomposition diagram of printed circuit board (PCB) is equipped with above-mentioned electric connector on the electronic installation;
Fig. 2 is the enlarged perspective of seeing from the back side of electric connector shown in Figure 1;
Fig. 3 is the sheet metal of compacting, and the plane graph of skeleton before moulding represented a plurality of parts that are connected on dismountable supporting bracket;
Fig. 4 is the cutaway view that metal shell that the compacting sheet metal base by Fig. 3 forms is cut open along Fig. 2 center line 4-4;
Fig. 5 is the plan view of the sheet metal base of compacting, and this plate is as first switch contact of switching connector of the present invention;
Fig. 6 is the end view of first switch contact of the Fig. 5 behind the first one-step forming;
Fig. 7 is the switch contact end view similar to Fig. 6 after the final molding;
Fig. 8 is the plan view as the compacting sheet metal base of the second switch contact of switching connector of the present invention, the on-off mode acting in conjunction of first and second switch contacts wherein below will introduce in detail;
Fig. 9 is the end view of the second switch contact of the Fig. 8 behind the first one-step forming;
Figure 10 is the end view similar to Fig. 9, expression final finished state;
Figure 11-the 13rd along the amplification view that the line 4-4 of Fig. 6 cuts open, represents the state that a switching connector of the present invention and a complementary connector mesh gradually, illustrates in contact, two effective contact position places and sweeps situation about connecing;
Figure 14 is the plan view as the compacting sheet metal base of first and second switch contacts of second embodiment of the invention;
Figure 15 is the end view of first and second switch contacts of second embodiment before meshing with a complementary connector;
Figure 16 is the end view of first and second contacts of the switching connector after meshing with a complementary connector.
Illustrate the present invention below in conjunction with accompanying drawing:
The present invention relates to a kind of switch contact, R.F switch for example, it is a part of electric connector, sweeping wherein connects and oppositely sweep relay part is to safeguard the integrality of electric connector and the vitals of electric continuity.
Shown in Figure 1 is preferred electric switch connector 10.Switch contact 12 is installed in the insulation crust 14 usually, and in the present embodiment, it is positioned near many signal contacts 16.If shell 14 is installed on the plate shaped electronic installation surface, printed circuit board (PCB) (PCB) for example, switch contact and signalling contact are electrically connected, and for example by welding, form suitable circuit-line 18 and 20 respectively.Fig. 2 has been illustrated more clearly in the situation of the solder taul that stretches out from the back 21 of shell 14.
Describe switch contact 12 now in detail, parts this metal or conduction comprise a metal-back 24 and the first and second cantilever type metal contact, and they all operationally are installed in the shell 14.Fig. 3 and 4 represents the metal base 26 and the in type metal-back 24 that suppress respectively.For the ease of making and reducing cost, this housing 24 can form with continuous bonding jumper compacting, phosphor bronze for example, and in Fig. 3, the housing of these two compactings is connected on the dismountable support bar 30.This housing is pressed and a main component 32 occurs, 36 provides a ledge 34 along the edge on it.As shown in Figure 4, this ledge 34 stretches out outside this surface of shell, as with printed circuit board (PCB) on trace or the solder taul of weld zone welding.Another feature of this shell blank 26 is to have two ledges 37 that stretch out from main component 32, and these ledges in the housing 24 of moulding are made into arc with cylindrical substantially profile.For the housing of moulding the most at last is fixed in the insulation crust 14, on main component 32, dig out a pair of cut-off 40, preferably and ledge 37 point-blank.
Fig. 5-7 and Fig. 8-10 represents the different views of first and second contact arms 42,44 respectively, and they constitute switch contact 12, showed the slab of compacting among these figure, is connected on the dismountable support bar, forms elementary contact, makes the finished product contact at last.Consider first contact arm 42 of Fig. 7, it comprises in the middle of one 46, one end of engagements that are bent upwards 48 of shank and one and described shank solder taul 50 at an angle of 90.And the projection that vertically stretches out from described shank is to touch tongue 52, and its function will become more clear in the description among Figure 11-13.
Figure 10 is illustrated in second contact arm 44 of final molding position, comprises an end of engagement 54, has the solder taul 58 of shanks 56 and moulding in the middle of 55, one of the parts of a back-flexing on it, this lead-in wire general with described shank 56 into about 90 ° of angles.
Figure 11-13 has not only showed the switching connector of the present invention after the assembling, and has shown that never engagement (Figure 11) is to the whole engagement order of local engagement (Figure 12) and last engagement (Figure 13).
In the accompanying drawing 11-13 of the connector that assembles, the housing 24 of moulding is installed in the insulation crust 14, in the corresponding recesses 60 that cut-off 40 embeds on shell 14 inwalls 62, makes this housing fix in position.Ledge 36 on the housing 24 of moulding stretches to end of engagement 64 as the crow flies, and its solder taul 34 extends back, and contacts with printed circuit board (PCB) downwards, and connector shell 14 is installed on this printed circuit board (PCB).In addition, the cylindrical shape insulation insert 66 that between the housing 24 of moulding and cantilever 42,44, has housing 24 inwalls of being close to moulding.This insert 66 has a central cavity 68, and its openend 70 is used to receive the contact 72 of complementary connector, only shows contact 72 among this figure.Openend 70 provides a ring-type convex shoulder 74, and it can lean with the end 76 of ledge 36.In addition, convex shoulder 74 can have a tapered center opening 78, so that the entering of complementary contact 72.
In central cavity 68, corresponding contact arm 42,44 is installed in 21 places, rear portion of shell 14 with cantilevered fashion, and its shank 46,56 is positioned on the solder taul of moulding just.Utilize the elastic characteristic of the Metal Contact arm 42,44 of moulding, with the state of complementary contact 72 non-engagements under these cantilevers be preset directly and contact, promptly contact ledge 52 is resisted against on the shank 56.The feature of a particular importance of the present invention is: contact arm 42,44 corresponding end of engagements 48,54 axially are provided with one by one.That is, the end of engagement 54 of contact arm 44 is positioned at before the complementary contact arm 42, and as shown in figure 12, it is initial and engagement contact 72 contacted positions.When contact 72 inserted central cavity 68, end of engagement 54 was compressed against downwards on the inwall 74 of insulation insert 66.Continuing to insert contact 72 has just realized sweeping of back-flexing part 55 surfaces connect.When contact arm 44 moved downward, corresponding contact arm 42 was pressed against on the shank 56 constantly by the effect of contact ledge 52.But, because contact arm 42,44th is cantilevered, or pivot from the separation point position, when keeping in touch (contact ledge 52 leans shank 56), there is a kind of mutual transverse movement, will cause connecing action sweeping of contact position place.
When complementary contact 72 continued to carry out gear motion, it contacted with the contact arm 42 that has axial notch, and made disconnection contact between contact ledge 52 and the shank 56, saw Figure 13.Contact arm coefficient with it 44 is similar, and contact arm 42 is upwards shifted to inwall 74.Then stop the persistent movement of contact 72, finished sweeping of end of engagement 48 and connect action.By this engagement and disengagement action, on critical contact position, realize sweeping to connect connecing, thereby make the adverse effect of oxidation and pollution reduce to minimum with oppositely sweeping, improved the performance of this make-before-break formula switching connector.
Figure 14-16 represents the second embodiment of the present invention.The blank of the electric switch connector 10 employed alternating-current switch contact arms among Figure 14 presentation graphs 1-13.First contact arm 142 also has the ledge 152 of similar first embodiment.Second contact arm 144 has a groove 153 that is used to receive the ledge 152 of this first contact arm.
Figure 15 represents this end view to alternating-current switch contact arm 142,144, and it can be contained in the shell 14 of first embodiment.The contact arm 142,144 here is in as yet the not state of engagement, and switch then is closed, because ledge 152 is halved together with new surperficial 157 of groove 153.
Figure 15 and 16 be illustrated in the engagement of complementary connector and throw off during, the interactional process of ledge 152 and the groove 153 of second switch contact arm 144.Before contact inserted, ledge 152 contacted with the rear surface 157 of groove 153.When switch contact inserts bottleneck reception area 155,, make switch opens because ledge 152 discharges from groove 153.Insertion by this switch contact and deviating from realizes sweeping connecing between the rear surface 157 of the rear surface of ledge 152 and groove 153, has eliminated the oxide that forms on switch contact.Provide the same with first embodiment of this design swept the effect of connecing, and need not continuously and each switch contact arm 142,144 contacts.

Claims (5)

1. an electric connector has a pair of cantilever type switch contact arm, they with a complementary connector engagement with complementary contact before normally closed, it is characterized in that:
At a cantilever type contact arm 42, have a contact ledge 52 that vertically stretches out on 142,152, extend the second cantilever type contact arm 44 towards second contact arm 44,144,144 roughly with first contact arm 42,142 extend in parallel, and have one and be used for the zone that electrically contacts with described contact ledge 52,152, make when meshing with complementary contact 72, each contact arm 42,142,44,144 electrically contact with this complementary contact 72, and contact ledge 52,152 and 44,144 actings in conjunction of second contact arm and a kind of structure is provided, make during the insertion of complementary contact 72 and deviating from, realize the connection function of sweeping between the contact ledge 52,152 and second contact arm 44,144.
2. electric connector according to claim 1, wherein contact ledge 52,152 is along the apparent motion of second contact arm 44,144, parallel with the contact direction of insertion sweeps the effect of connecing thereby produce one.
3. according to the electric connector of claim 1 or 2, wherein said contact arm 42,142, one of 44,144 length is greater than another contact arm 42,142,44,144, long contact arm more stretches to than another contact arm and near the insertion surface of connector, so that the complementary contact 72 and the contact arm of length are electrically contacted earlier.
4. electric connector according to claim 1, wherein two contact arms 42,142,44,144 have identical length, and extend to a common point of the insertion field of conjugate action of connector.
5. according to claim 1,3 or 4 described electric connectors, wherein the contact ledge 152 of first contact arm is embedded in the groove 153 that is formed on second contact arm 144, is created in the effect of connecing of sweeping between the edge surface 157 of contact ledge 152 and groove 153.
CN96195064A 1995-06-28 1996-06-27 Switching contact mechanism with wipe and backwipe Pending CN1189250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN96195064A CN1189250A (en) 1995-06-28 1996-06-27 Switching contact mechanism with wipe and backwipe

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/495,143 1995-06-28
US08/615,905 1996-03-14
CN96195064A CN1189250A (en) 1995-06-28 1996-06-27 Switching contact mechanism with wipe and backwipe

Publications (1)

Publication Number Publication Date
CN1189250A true CN1189250A (en) 1998-07-29

Family

ID=5128973

Family Applications (1)

Application Number Title Priority Date Filing Date
CN96195064A Pending CN1189250A (en) 1995-06-28 1996-06-27 Switching contact mechanism with wipe and backwipe

Country Status (1)

Country Link
CN (1) CN1189250A (en)

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