CN1161583A - Sealed electrical connector - Google Patents

Abstract

An electrical connector, comprising: a connector body including a mating front end and a wire insertion rear end and a joint passage extending therebetween; a joint fixed in the joint passage including a contact front and a The wires of the wires inserted into the rear end engage the rear end, and the wires protrude from the connector backwards out of the wire insertion end; a seal located in the connector body, including an outer sealing surface that forms a seal with the connector body and a seal with the rear The extension wire forms a sealed inner sealing surface; there is a joint sheath on the joint, and the sheath can be inserted into the joint to form a plug-in.

Description

The electrical connector of sealing

The present invention relates to electrical connector, particularly need seal to guarantee to be electrically connected not contaminated electrical connector at the lead of hauling out from its rear end.

Industrial have many occasions to need electrical connection positiver sealing between the two-phase connector and not contaminated, and particularly in automobile, connector is arranged in engine chamber and can be subjected to road surface water spray, combustion by-products and to the pollution of other harmful material of reliable electrical connection.The most common way that addresses this problem is to form a sealing shroud by two connectors that match, and is stretched over the seal of the lead that gets on from the second half connectors thereby electrical connection place is with one from the lead that enters the first half connectors always.These available many modes realize, but generally a sealing are set between the parts of matched plug-in unit, then at the lead of hauling out from plug shell with further each plug shell of sealing of sealing.What problem sealing between two and half connectors does not generally have, when two and half connectors in a single day be assembled together and during relative fixed sealing be similar to the O shape circle that is pressed between two and half connectors.But, under some occasion,, just can't guarantee positiver sealing between the lead of hauling out on the plug shell when the lead of hauling out connects package case when being subjected to very big pulling.

A kind of way that solves the sealing problem is to use the single conductor sealing, and promptly each joint uses a sealing.These sealings are enclosed within from the lead that haul out the rear end back hermetically and insert the passage corresponding with the passage of placement joint of connector body.The general system of single conductor sealing is enclosed within on the rubber-like elastic material.

Another kind ofly particularly normally usedly under the high density occasion be sealed into series sealing.The visible United States Patent (USP) 4,629,269 of an example of series sealing.This patent illustrates the plug shell that wherein is placed with a plurality of joints, and each lead of hauling out from its rear end passes each aperture in a series of sealings.Each aperture that each joint was pushed away the sealing part can be put into this connector to joint.In a series of sealings, there are many apertures to extend through for the rear end lead.The sealing of this series comprises that one constitutes the external seal face of sealing with connector body, thereby only can form sealing with many rear end leads with a seal.As everyone knows, this series sealing is also made by rubber type of material.

A problem when using the sealing of this series is, generally the lead than to be sealed is big in effective cross section of the joint of termination lead on it.Although the physical characteristic of sealing material therefor stretches this material and is enough to for joint passes still form sealing along the rear end lead, problem also not only is the effective cross section of joint.

Packing into has some parts can damage sealing when this joint passes sealing on the electrical connector center sub at present.For example 1 one joints can comprise from the outwardly directed tongue-shaped projection formula of connector body locking bar; Also can there be directed rib the supplemental support spring correctly maybe can be arranged to improve the intensity of joint spring arm to guarantee the orientation of joint in connector.And the sharp edges of all these parts and adapter body or racing place can cause the microlesion of the sealing surface that joint must pass.Sealing surface unclamps so that allow when the joint of effective cross section therefrom passes greatly all the more so.The result forms small scratch and reduces sealing validity and in the sleeve pipe that pollutant entered be considered to seal.

A kind of method that is used for improving the sealing of the lead of hauling out the rear end is that the self-styled condensation material of colloid substance and so on is used as sealing on the lead of rear end.The visible United States Patent (USP) of doing like this 4 of an example, 662,692, wherein, should the glue encapsulant when termination has the joint of rear end lead to pass colloidal material guarantee that from the involution characteristic some damage that is caused by the joint that passes wherein obtains repairing, but this class sealing is not to be suitable for all occasions.In addition, because of receptacle contact at present pass the glue sealing that causes damage can't by this material from the complete involution of involution.

Therefore a problem is, when termination had the joint of rear end lead to pass a sealing, joint can damage sealing.This damage finally makes the sealing validity on the lead that the rear end hauls out descend.Therefore need guarantee that the sealing surface that seals along the rear end lead is not damaged.Lead can't just pass sealing before terminating on the joint in many cases, therefore must pass sealing to joint.

Hinder problem in order to solve seals damaged, a kind of electrical connector of termination one lead is provided, this connector comprises a connector body, and this main body comprises that one cooperates front end, a lead to insert a rear end and a joint passage therebetween; One joint is placed and is fixed in this joint passage, described joint comprises that a contact that can touch from the cooperation front end of connector body is anterior and one is used for termination and is positioned at the conductor engagement rear end that the lead of connector body inserts the lead of rear end, thereby this lead stretches out outside lead insertion rear end from connector; An and sealing that is placed in this connector, its external seal face and connector body form sealing, and its inner sealing surface stretches out lead formation sealing along this rear end, this electrical connector is characterised in that, one slick joint sheath is set, and it is used as at least a portion joint interface channel, and can insert wherein for this joint before inserting connector, thereby form a plug-in unit, this plug-in unit can pass the inner sealing surface of sealing and insert in the connector body and be fixed therein.

An advantage of the invention is, when this plug-in unit inserts in the connector body, smooth jacket protection inner sealing surface.Another advantage of the present invention is that sheath can be made by insulating material.Another advantage of the present invention is that lead can just terminate on the joint after joint inserts in the sleeve.Another advantage of the present invention is that this structure can be used for any above-mentioned hermetically-sealed construction.

Illustrate the present invention below in conjunction with accompanying drawing.

Fig. 1 is the side cutaway view of electrical connector of the present invention;

Fig. 2 is the vertical view that is contained in the sheath of the present invention in Fig. 1 connector;

Fig. 3 is the front view of Fig. 2 sheath;

Fig. 4 is the rearview of Fig. 2 sheath;

Fig. 5 is for cuing open the profile of this sheath of getting along 5-5 line among Fig. 2;

Fig. 6 constitutes the partial sectional view of the plug-in unit in a load map 1 connector on the joint for Fig. 2-5 sheath is set to;

The same Fig. 6 of Fig. 7, but the plug-in unit that another kind of structure is shown is in primary importance;

The same Fig. 7 of Fig. 8 is in the second place but this plug-in unit is shown; And

Fig. 9 illustrates the joint that is enclosed within the another kind of structure in the sheath.

At first as can be seen from Fig. 1, electrical connector of the present invention is represented with 2.This electrical connector comprises the connector body 4 that an electric principal part 6 and nose 8 constitute.This connector body 6 comprises that one on the nose 8 cooperates the lead on front end 10 and the principal part 6 to insert rear end 12.Joint 14 is housed in the connector body 4, and its upper end is connected to from connector 4 protruding and cross the lead 16 that lead inserts rear end 12.One sealing 18 is put along connector 4.Sealing comprises that one forms the outer surface 20 of sealing with connector body 4 and forms the inner surface 22 of sealing along rear end lead 16.In this embodiment, seal 18 is one to have the series sealing of a plurality of inner surfaces 22 that pass for leads 16.Can see that also the present invention can be used for the single conductor sealing or made by nonrubber class material, for example silicon rubber.Seal 18 covers after sealing on 18, buckling in the principal part 6 with 26 fixing location-plates 24 location wherein of the hangnail in the patchhole 28 by one.This location-plate 24 can apply thrust and improves sealing with lead 16 and connector body 4 sealing 18.

The position of joint 14 in sheath 30 makes the jack 34 of cooperation front end 10 that can be by connector body 4 noses 8 touch the preceding contact site 32 of joint 14.As described in greater detail, joint 14 just is inserted in sheath 30 before in inserting connector body 4.Joint 14 and sheath 30 constitutes one and inserts in the connector body 4 and fasten the fixing plug-in unit 36 (also can referring to Fig. 6) wherein of part 38 with a bolt or latch by the elasticity master, this elasticity master fastens part 38 with a bolt or latch and gives way from the out-of-date deflection of its bypass when plug-in unit 36, rebound again then, thereby its shoulder 40 is arranged in plug-in unit 36 rears and prevents that plug-in unit 36 from withdrawing from from connector body 4.Thisly mainly be fixed with multiple known manner, can adopt wherein any here easily.In addition, for further guaranteeing unlikely being drawn out of in correct location of plug-in unit 36, also have one also to be known auxiliary latch fitting 42 in this connector assembly 2.In the figure, auxiliary latch fitting 42 cooperates with plug-in unit 36 and prevents that plug-in unit is drawn out of along sheath 30.Auxiliary latch fitting 42 also can be directly cooperates with joint 14 in the plug-in unit 36 and guarantees that joint is fixing and correctly locate.Perhaps, also can by nose 8 cooperate with resilient latch arms 38 and guarantee that resilient latch arms 38 is inserted at plug-in unit 36 can't be after fixing in the connector body 4 to extrinsic deflection.This cooperation also can be guaranteed the correct location of joint 14 in connector body.

One matched plug-in unit (not shown) can from cooperate front end 10 be connected to shown on the connector 2, its pin inserted in jack 34 and was connected with receptacle contact 14 this moment.Be enclosed within on nose 8 and the elastic arm 38 from the outwardly directed guard shield of this matched plug-in unit and stretch between the annular lip 46, wherein have a connector to match in sealing 48 the hole 44, the sealing 48 that matches of this connector prevents that foul from entering this to connector from these two connector junctions.Sealing 18 prevents that foul from entering along rear end lead 16.The combination of these two seals can guarantee that receptacle contact 14 is not contaminated with pin (not shown) interconnection place that matches.Because the present invention relates generally to along the rear end lead and obtains excellent sealing, therefore obviously as seen, can be on demand at other hermetically-sealed construction of use between two connectors that matches.

Below in conjunction with Fig. 2-5 in detail sheath 30 is described in detail.Sheath 30 comprises a front end 50 and a rear end 52, and there are a jack 34 and match end 10 corresponding (see figure 1)s that match connector receptacle 54 and connector body 14 at front end 50 places.The connector receptacle that matches 54 with extend in sheath in and in the rear end joint passage 56 of connector receptacle 58 place's openings of 52 communicates.Joint 14 will be inserted in this passage 56.Joint 14 has on it one to cooperate with joint and prevent that the locking tab 60 of the shoulder block 62 that it is drawn out of is fixed in the passage 56 by one, and this can see the most clearly from Fig. 6.A pair of notch 64 52 stretches inwards and makes lug 60 have elasticity from the rear end, thereby can insert joint.From Fig. 3 as seen, sheath has the rectangle outer surface 66 that is made of two pairs of relative limits 70,72, links to each other with big arc 74 between each limit, thereby is formed on the smooth surface that passes through on sealing 18 inner surfaces 22.If will be plug-in unit 36 provider tropisms, projection or concave surface 76 can be made in a limit of the outer surface 66 of this sheath.Shiny surface is also made at these directed positions, so that guarantee not exist the sharp sword that can scratch sealing 18.Can see also that from Fig. 2 and Fig. 5 the transition position between front end 50 and rear end 52 and the outer surface 66 also is a circular arc 78.Do not damage inner surface 22 during each hole that this circular arc 78 is guaranteed to be defined by inner surface 22 in sheath 30 indentation sealings 18.

Plug-in unit shown in Fig. 6 36.Plug-in unit 36 comprises sheath 30 and joint 14.Preceding contact site 32 comprises the contact arm 80 that reaches nose 84 from main body 82.Sword 86 in the sheath 30 of having packed into is all arranged on each arm 80, and main body 82 comprises that also direction shoulder 88 backward cooperates with the shoulder block 62 of door bolt part 60 and guarantee that joint 14 does not come off from sheath 30.Joint 14 also comprises one via the conductor end of engagement 90 of transition region 92 with main body 82 interconnection.The conductor end of engagement 90 of joint 14 is one to comprise that conductor engagement crimp 94 and tensioning remove the crimping contact of crimp 96, to clamp and fixing cord 16 reliably.As shown in the figure, the length of sheath is made when joint inserts wherein, and rear end 52 does not reach conductor engaging piece 90 places, thereby sheath 30 can be set on the joint 14 before joint 14 termination leads 16.This is set on the joint in the time of can making sheath 30 on joint 14 Shang Zaiyi carrier strip (not shown)s.

In addition, Fig. 7 and Fig. 8 illustrate another embodiment of plug-in unit with 136, and the joint 114 in this plug-in unit 136 is the same, but have this joint to be fixed on elasticity locking bar 101 in the sheath 130.The structure of sheath 130 is also the same, but longer slightly.This sheath comprises first location hole 103 and second location hole 105, and they cooperate with backstay 101 and form first and second positions (seeing Fig. 7 and Fig. 8 respectively).In the primary importance of Fig. 7, the conductor engaging piece 190 of joint 114 exposes outside sheath 130.This can be in sheath termination conductor (not shown) in joint 14 is connected still.In case conductor is finished termination, just joint 114 is pushed the second place of Fig. 8, thereby sheath 130 entangles the whole joint that comprises conductor end of engagement 190.When using insulation displacement joint and so on conductor engagement technology, this structure advantageous particularly.

Referring to Fig. 1, plug-in unit 36 at first constitutes shown in Figure 6 below.Joint 14 has inserted in the sheath 30 and owing to fixing wherein cooperating of shoulder block 62 on the door bolt spare 60 of the shoulder on the joint 14 88 and sheath 30.Be with seal 18 in the connector body 4.Insert rear end 12 from lead then plug-in unit 36 is inserted the connector body 4, thereby plug-in unit passes seal 18.Because plug-in unit 36 is used as and entangles the angle sword 86 of joint 14 and the sheath of nose 84, thereby the protection inner sealing surface is not scratched.Although sheath 30 has increased the effective cross section of plug-in unit 36, the elasticity of seal 18 can be passed for plug-in unit 36.In a single day plug-in unit passes sealing 18 and elastic arm 38, and abutment face 40 promptly cooperates and fixing pluge 36 with the back 52 of sheath 30.In case all insert, can insert auxiliary latch fitting 42 in the connector body 4 and guarantee that further each joint does not withdraw from from its fixed position.If plug-in unit 36 not exclusively inserts, resilient latch part 38 can not be returned to original position, thereby owing to the passage blocking is assisted latch fitting 42 and can't be inserted in the connector body 4.

Fig. 9 illustrates another kind of structure.In this structure, plug-in unit 236 structures make and comprise that its front portion is with the joint 214 of a sheath 230.This sheath directly is deposited on the joint 214 with spraying plating, dipping or other technology with epoxy resin or rubber-like synthetic, thereby makes sharp sword become circle and the protection sealing.

Thereby can advantageously provide a kind of electrical connector; wherein the seal that forms sealing between connector and rear end lead is protected with a plug-in unit; this plug-in unit had the sheath that entangles joint before this plug-in unit being inserted sealing; this sheath can be sheathing member or the resinous material coating that the usefulness insulating material that entangled joint before passing sealing is made, and makes the sharp sword of joint become smooth after the sclerosis and forms smooth surface.

Claims (7)

1. An electrical connector for terminating a wire, the connector comprising: a connector body including a mating front end and a wire insertion rear end and a connector channel extending therebetween; A connector placed and secured in the connector passage, the connector comprising a contact front accessible from the mating front of the connector body and a wire engaging rear end toward the wire insertion rear end of the connector body so that when the wire end The wires protrude rearwardly from the connector beyond the wire insertion end when connected to the connector; and a seal in the connector body, including an outer sealing surface forming a seal with the connector body and an inner sealing surface forming a seal with the extending wire; It is characterized in that a joint sheath with a smooth surface is sheathed on the joint, and the sheath and the joint constitute an insert that can be inserted into the main body of the connector and fixed in the main body of the connector after passing through the seal along the inner sealing surface. 2. The electrical connector of claim 1, further characterized in that the sheath is a plastic sheath occupying at least a portion of the contact passage and having smooth transitions on its outer surface. 3. The electrical connector of claim 2, further characterized in that the sheath encloses the contact front portion of the terminal. 4. The electrical connector of claim 3 further characterized in that the sheath encloses the engaging end of the wire. 5. An electrical connector according to any one of the preceding claims, further characterized in that it has an auxiliary locking member. 6. The electrical connector according to any one of the preceding claims, further characterized in that the electrical connector includes a plurality of connectors inserted into each connector respectively, and the seal is a series of seals, which have multiple and multiple The inner sealing surface corresponding to each wire extending from the joint. 7. The electrical connector of claim 1, further characterized in that the sheath is coated with an epoxy-like material.

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