Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
  • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
  • H01R4/2491—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by conductive cams or wedges

Definitions

• the present invention relates generally to self-stripping connectors. It relates more particularly to a stripping accessory of at least one insulated electrical conductor with a conductive core and insulating sheath comprising, on the one hand, means for cutting the insulating sheath over a certain length in a direction substantially parallel to the axis. said conductor, and, secondly, means for separating and discharging outside said accessory of said insulated sheath cut from each electrical conductor.
• the invention finds a particularly advantageous application in the equipment of a so-called self-stripping connection terminal, whether it is a connection terminal intended to act in isolation, for example for the connection of an electrical conductor to another, or that it is a connection terminal which, being an integral part of the housing of any electrical equipment, or duly attached to this housing, is intended for the connection, to this apparatus, of a electrical conductors necessary for its service.
• the means for stripping an electrical conductor in the self-stripping connection terminals already known, are means for tearing, drilling or cutting the insulating sheath of the electrical conductor, in a direction substantially perpendicular or parallel to the axis of said driver.
• It may be a slot whose bottom forms a receiving housing of the conducting core of the conductor and provided with cutting lips extending perpendicularly to the axis of said conductor.
• This slot is secured to a cover adapted to close a receiving housing.
• the electrical conductor is housed partially in said receiving housing, then the cover is folded down thereon so that the slot straddles said electrical conductor.
• the electrical conductor is then introduced into the slot, in a direction of introduction parallel to said cutting lips, and these cut and locally move the insulating sheath of said conductor in a direction perpendicular to the axis of the latter, so that a portion of its conductive core is housed in the bottom of said slot and makes electrical contact with the terminal.
• It may be a metal tip that pierces the insulating sheath of the electrical conductor placed in a receiving housing, the drilling being carried out in a direction perpendicular to the axis of said conductor, so as to come into contact with the conductive core of said conductor for making the electrical connection.
• the main disadvantage of the above-mentioned insulating or drilling displacement means lies in the fact that they do not make it possible to achieve a clear separation of the insulating sheath with respect to the conductive core of the electrical conductor, and it may then remain , after stripping of the electrical conductor introduced into a connection terminal equipped with such stripping means, one or more chips (x) of insulating sheath between the conductor core of said conductor and the metal part of electrical connection of said terminal, the chips causing poor electrical contact between the conductor and said connection terminal.
• the introduction and stripping of the electrical conductor in the aforementioned connection terminals require two separate actions of the installer, which is relatively complex and can take a significant time.
• This terminal consists of several assembled parts. It comprises a first part pierced with a cylindrical conduit of revolution forming the insertion opening of the insulated electrical conductor in which said knives extend and opening onto a frustoconical outlet whose oblique wall forms one of the oblique walls of each duct. 'evacuation. It furthermore comprises a second part provided with a frustoconical mouthpiece whose oblique wall forms the other of the oblique walls of each discharge duct, followed by a cylindrical duct forming the housing for receiving the stripped conductive core of the conductor. electric.
• first and second parts are perfectly aligned so that the stripping operation is performed correctly, which implies a complex realization of said terminal.
• the portion of insulating sheath cut from the electrical conductor inserted in said terminal is not evacuated correctly by the conduits of evacuation but it is introduced into the receiving housing of the conductive core by causing a fault electrical contact between the electrical conductor and the metal contact member of the terminal.
• the knives are fixed rigidly to the body of the terminal.
• the present invention proposes a new stripping accessory as defined in the introduction, characterized in that the cutting means and the separation and evacuation means belong to the same single piece of so that there is perfect continuity between them.
• the stripping accessory comprises downstream of said means for separating and discharging the downstream guide means of the stripped conductive core which belong to said monoblock part to which belong said cutting means and said separation and evacuation means;
• said cutting means comprise, for each electrical conductor, at least one cutting lip extending substantially parallel to the axis of the electrical conductor;
• the cutting means comprise two cutting lips disposed substantially in V between which is defined an introduction slot of the electrical conductor;
• said separation and evacuation means are arranged in such a way that the separation and evacuation of the cut insulating sheath take place on either side of the axis of said electrical conductor;
• said separation and evacuation means comprise, for each electrical conductor, two ramps extending generally obliquely with respect to the direction of insertion of each electrical conductor into said accessory, said ramps being divergent with respect to the other ;
• It consists of a cut and folded thin metal part comprising, for each slot, a branch formed by one of the cutting lips and one of the ramps
• the invention also relates to an electrical connection terminal which comprises downstream of a metal electrical contact member a stripping accessory according to the invention.
• DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT The following description with reference to the accompanying drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be implemented.
• - Figure 1 is a rear perspective view of a first embodiment of the stripping accessory according to the invention
• - Figure 2 is a front perspective view of the stripping accessory of Figure 1
• FIG. 3 is a side perspective view of the stripping accessory of FIG. 1;
• FIG. 4 is a front perspective view of a second embodiment of the stripping accessory according to the invention
• - Figure 5 is a rear perspective view of the stripping accessory of Figure 4
• FIG. 6 is a front view of FIG. 7
• - Figure 7 is a rear perspective view of the stripping accessory of Figure 4 on which are reported said guide means of Figure 6
• - Figure 8 is a rear perspective view of the guide means of the electrical conductors to report on the stripping accessory of Figure 4
• FIG. 9 is an exploded perspective view from behind of electrical equipment showing its connection terminals to which the stripping accessory of FIG. 7 is attached.
• FIGS. 1 to 5 show two embodiments of a stripping accessory 100 of at least one insulated electrical conductor 10. This is in practice a rather rigid electrical conductor with a conductive core 11 and sheath 12. Of course, it can introduce in this stripping accessory 100 any type of insulated electrical conductor, flexible or rigid, single-strand or multi-strand.
• the conductive core 11 is made of metallic material such as copper wires
• the insulating sheath 12 is an envelope of thermoplastic material. As shown particularly in FIG.
• the electrical conductor 10 has an elongated cylindrical shape of revolution about the X axis.
• This stripping accessory 100 can advantageously equip a connection terminal 10 called a self-stripping connector that can be used to connect the electrical conductor. isolated to another conductor not shown (see Figure 1) or may be integral with a housing of an electrical equipment or be reported, to allow the connection of this equipment to the electrical conductor necessary for its service (see Figure 9 ). As shown in FIGS.
• the stripping device 100 comprises, on the one hand, means 110 for cutting the insulating sheath 12 of the electrical conductor 10 over a certain length along a direction X 1 substantially parallel to the axis X of said electrical conductor, and, secondly, separation and discharge means 140, 150 outside said stripping accessory of said insulating sheath 12 cut from said electrical conductor 10.
• the cutting means 110 and the separating means and outlet 140, 150 of the accessory belong to the same one-piece part, so that 'there is a perfect continuity therebetween. As shown more particularly in FIGS.
• the cutting means 110 comprise, for each insulated electrical conductor 10, two cutting lips 112, 113 arranged substantially in V between which is defined a slot 111 for introducing the electrical conductor 10.
• Each slot 111 extends along the axis X1 introduction of the electrical conductor in said stripping accessory 100.
• the stripping accessory 100 shown in Figures 1 to 3 comprises two slots 111 for introducing two insulated electrical conductors 10 and stripping accessory 100 shown in Figures 4 and 5 comprises six slots 111 for introducing six insulated electrical conductors.
• the separation and evacuation means 140, 150 comprise, for each electrical conductor, two ramps 140, 150 extending generally obliquely along the axes Y1, Y2 with respect to the direction of the introduction X1 of each electrical conductor in the slot 111 of the stripping accessory 100, these ramps 140, 150 being divergent relative to each other. It will be noted that the two ramps 140, 150 associated with each slot 111 have slightly curved surfaces which are connected continuously to said cutting lips 112, 113. According to the embodiment shown in FIGS.
• the stripping accessory 100 is consisting of a metal piece 1 thin cut and folded comprising, for each slot 111, a branch formed by one of the cutting lips 112 and one of the ramps 140 extending in the continuity of this cutting lip 112 and another branch formed by the another cutting lip 113 and the other ramp 150 which extends in the continuity of this cutting lip 113.
• Each of the branches of the metal part 1 constituting the stripping accessory 100 is connected by a bend to a rear wall 2. According to a preferred characteristic of the stripping accessory 100 shown in FIGS. 1 to 3, the branches of said metal part 1 have a certain degree of freedom.
• the stripping accessory 100 shown in Figures 4 and 5 is made of a single piece of molded plastic material. It also comprises a rear wall 2 which supports on the front face the ramps 140, 150 which extend in the continuity of the cutting blades 112, 113.
• FIGS. 4 and 5 illustrate another advantageous characteristic of the stripping accessory 100 shown in FIGS.
• the latter comprises downstream separation and evacuation means 140, 150, downstream guide means 160 of the bare conductive core of each isolated electrical conductor, these downstream guide means 160 belonging to said part monoblock 1 to which also belong said cutting means 110 and said separation and evacuation means 140, 150.
• these downstream guide means comprise for each insulated electrical conductor a circular orifice 160 formed in the rear wall 2 of the stripping accessory 100, this circular orifice 160 having an axis coincident with the insertion direction X1 of the insulated electrical conductor 10 in said den component;
• FIG. 1 when the stripping accessory 100 equips one or more connection terminals 10, each circular orifice 160 constituting the downstream guide means is positioned in front of the entrance to the housing.
• the stripping accessory 100 may comprise upstream guiding means 201 of each isolated electrical conductor towards the cutting means 110.
• these upstream guide means here comprise, for each insulated electrical conductor, a cylindrical duct 201 centered on the introduction direction X1 of the electrical conductor insulated in said stripping accessory 100.
• these upstream guide means 201 belong to a cover 200 attached by snapping on the front face of the stripping accessory 100.
• the stripping accessory 100 shown in Figures 4 and 5 equipped with the cover 200 comprises latching means adapted to cooperate with latching means complementary provided on the outer face of a base 20 of an electrical equipment on either side of the terminal block 21 of this apparatus.
• the stripping accessory 100 shown in FIGS. 4 and 5 is particularly suitable for allowing the stripping of six insulated electrical conductors, namely three electrical conductors supplying the electrical equipment located in the base 20 and three conductors. for the transplanting of each of the terminals to serve other electrical equipment of the same type.
• the stripping accessory 100 shown in the figures, associated with one or more connection terminals, operates in the following manner. One end of the electrical conductor 10 cut is engaged in the upstream guide means 201 so that the cut end face of the conductor, leaving exposed the conductive core 11, is positioned against the cutting lips 112, 113 of the accessory 100.
• the insulated electrical conductor 10 is pushed along the X1 axis in the corresponding slot 111 of said stripping accessory 100, and the cutting lips 112, 113 cut out the insulating sheath 12 of this insulated electrical conductor 10 on both sides. other of its X axis over a certain length so as to strip locally this insulated electrical conductor 10.
• the insulating sheath 12 cut is separated and discharged to the outside of the stripping accessory 100 by sliding on the ramps 140, 150.
• the stripped conductive core 11 of the electrical conductor 10 then engages in the circular orifice 160 provided in the rear wall 2 of the stripping accessory. 100 and is guided to terminal 10; 21 corresponding.
• This denuded conductive core 11 introduced into the terminal may be blocked by a conventional non-represented locking member which may be an automatic assembly member of the terminal and the conductor. Due to the perfect continuity between the ramps 140, 150 and the cutting lips 112, 113 corresponding, there is no risk that the insulating sheath 12 cut does not escape outwards and is introduced into the circular orifice 160 provided for guiding the conductive core 11 to the corresponding terminal.
• the width of the slot 111 defines between the pair of corresponding cutting lips 112, 113 adapts to the dimension and the more or less oval shape of the insulated electrical conductor 10 to be connected.
• the present invention is not limited to the embodiments described and shown, but the skilled person will be able to make any variant within his mind.

Landscapes

• Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
• Connector Housings Or Holding Contact Members (AREA)
• Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
• Ladders (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)
• Insulated Conductors (AREA)
• Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34945616

Family Applications (1)

Country Status (8)

Cited By (1)

Citations (7)

• 2004
  • 2004-06-03 FR FR0405991A patent/FR2871299B1/fr not_active Expired - Fee Related
• 2005
  • 2005-05-31 EP EP05773028A patent/EP1751827B1/fr not_active Not-in-force
  • 2005-05-31 WO PCT/FR2005/001325 patent/WO2006000681A1/fr active IP Right Grant
  • 2005-05-31 ES ES05773028T patent/ES2292145T3/es active Active
  • 2005-05-31 PT PT05773028T patent/PT1751827E/pt unknown
  • 2005-05-31 AT AT05773028T patent/ATE373324T1/de not_active IP Right Cessation
  • 2005-05-31 DE DE602005002480T patent/DE602005002480T2/de not_active Expired - Fee Related
  • 2005-05-31 CN CNB200580017533XA patent/CN100486035C/zh not_active Expired - Fee Related

Patent Citations (7)

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