EP3799211B1 - Terminal de connexion pour l'entonnoir d'insertion - Google Patents

Terminal de connexion pour l'entonnoir d'insertion Download PDF

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Publication number
EP3799211B1
EP3799211B1 EP20187941.8A EP20187941A EP3799211B1 EP 3799211 B1 EP3799211 B1 EP 3799211B1 EP 20187941 A EP20187941 A EP 20187941A EP 3799211 B1 EP3799211 B1 EP 3799211B1
Authority
EP
European Patent Office
Prior art keywords
cage
conductor
contact
region
retracted
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.)
Active
Application number
EP20187941.8A
Other languages
German (de)
English (en)
Other versions
EP3799211A1 (fr
Inventor
Olaf Baumeister
Philipp Henrici
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.)
BJB GmbH and Co KG
Original Assignee
BJB GmbH and Co KG
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 BJB GmbH and Co KG filed Critical BJB GmbH and Co KG
Publication of EP3799211A1 publication Critical patent/EP3799211A1/fr
Application granted granted Critical
Publication of EP3799211B1 publication Critical patent/EP3799211B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4846—Busbar details
    • H01R4/4852—Means for improving the contact with the conductor, e.g. uneven wire-receiving surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/515—Terminal blocks providing connections to wires or cables
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H01R4/4819—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end the spring shape allowing insertion of the conductor end when the spring is unbiased
    • H01R4/4821—Single-blade spring

Definitions

  • the invention relates to a connecting terminal with a contact cage, which has a cage base, a cage cover and two opposing cage side walls, each connecting the cage base to the cage cover, which together form a lateral surface and surround a conductor receiving space, with a cage formed by at least one spring element and a counter bearing Clamping point, which is used to hold and electrically contact an electrical conductor, with a conductor insertion opening on the end face, which is surrounded by the cage side walls, the cage top and the cage floor and through which the electrical conductor can be inserted into the conductor receiving space and fed to the clamping point, with a oriented in the conductor insertion longitudinal axis of the contact cage, with an in particular cylindrical normal cross-section contour of the contact cage, which essentially extends from the end face of the contact cage to an end of the contact opposite the end face thims extends, wherein the outer surface of the contact cage is retracted in a region downstream of the conductor insertion opening in the insertion direction and narrows the conductor receiving space
  • connection terminals are placed directly on printed circuit boards, in particular as so-called SMD components (surface mount device), in order to establish a connection with conductors, in particular cables, which are used for the voltage supply or for feeding in control signals.
  • SMD components surface mount device
  • Such connection terminals are often designed without a housing and are arranged in a row next to one another on printed circuit boards. Here, the distances between two connection terminals are reduced to a minimum, which usually only corresponds to the required insulation distance.
  • a generic terminal is, for example, from DE 10 2015 115 791 A1 known.
  • This clamp makes it possible to open the clamping point formed by the counter bearing and the spring element.
  • the spring element can be displaced away from the counter bearing via an actuating handle projecting laterally from a side wall of the cage.
  • a variant of the actuating tool which has an assembly upstream of the conductor insertion opening of the connection terminal, which is spread open relative to the rest of the outer contour and forms an insertion funnel upstream of the conductor insertion opening. If this embodiment of the operating tool is seated on the terminal from the prior art, the insertion funnel is used for Improved introduction of connection cables, especially those whose conductors are multi-wire.
  • KR 10 2019 0046639 A shows a connection terminal in which the side wall ends are bent back by 180 degrees and pushed into the conductor entry channel. These end sections are then shaped in the direction of the longitudinal axis of the contact in order to act as a guide in the area of the clamping point. This document does not show inclined surfaces in the conductor insertion area.
  • the DE 20 2015 103 005 U1 also shows a terminal which consists of a contact body and a housing accommodating the contact body.
  • a terminal which consists of a contact body and a housing accommodating the contact body.
  • Several contact bodies are preferably arranged here with their longitudinal axis parallel to one another in a housing in order to arrange as many connection terminals as stably as possible with the smallest possible space requirement on the circuit board.
  • the DE 10 2015 115 791 A1 finally shows a connection terminal whose insertion opening has a ramp-like inclined surface that guides the electrical conductor in the direction of the terminal section.
  • the clamping section is designed to be open on one side and forms a viewing window, which is intended to be used to check the inserted conductor.
  • the object of the invention is therefore to provide a generic connection terminal, in particular without a housing, which can be used for both manual and machine assembly, in particular with multi-wire connection conductors, while ensuring minimum arrangement distances.
  • the invention is achieved with a connecting terminal with the features of claim 1, in particular with its characterizing features, according to which both cage side walls each form an inclined guide surface, the inclined guide surfaces together with the cage cover form an insertion funnel downstream of the insertion opening in the insertion direction, the lateral surface of the contact cage in the The region downstream of the insertion direction is drawn in by offsetting the side walls of the cage inwards on both sides in the direction of the longitudinal axis of the cage, the drawn-in area of the lateral surface of the contact cage extends into the area of the access openings and narrows the conductor receiving space, and that the cage cover has one access opening each in the transition area to the respective side wall for an opening tool, which allow access to the spring element.
  • the conductor insertion opening is provided with at least one inclined guide surface, in that the lateral surface of the contact cage of the connecting terminal is retracted in some areas. Of the The retracted area lies in particular between the conductor insertion opening and the clamping point.
  • connection terminal allows an inclined guide surface to be formed for guiding a multi-wire conductor without increasing the housing dimensions of the connection terminal.
  • the conductor is displaced in the direction of the longitudinal axis of the contact cage and thus in the direction of the center of the contact cage due to the retracted area of the lateral surface. In this way, its position is optimized in the assembled state.
  • both cage side walls each form an inclined guide surface. This significantly improves the centering of the conductor to be inserted into the connection terminal.
  • the cage bottom forms a tongue that extends from the conductor insertion opening in the direction of the end of the contact cage and forms a further inclined guide surface, in particular if the inclined guide surfaces together with the cage top form an insertion funnel downstream of the insertion opening in the plugging direction.
  • connection terminal is centered in the direction of the longitudinal axis of the contact or the longitudinal axis of the connection terminal or the longitudinal axis of the contact cage by inclined surfaces converging in a funnel-like manner.
  • an opening tool is provided, the active elements of which are seated in the engagement openings and are located upstream of the clamping point in the direction of conductor insertion and further narrow the conductor receiving space compared to the drawn-in lateral surface and additionally guide the conductor to be inserted in the direction of the longitudinal axis of the contact cage.
  • the gripping openings partially extend into the respective side wall.
  • an approximately roof-like inclined partition wall is inserted, which connects the cage roof and the side wall, with a roof-like inclined partition wall preferably being arranged between the cage roof and each side wall.
  • the inner surface of the cage cover in the area of the clamping point is provided with a profile, in particular with grooves, which serve to improve the retention of the conductor in the clamping point.
  • connection terminal according to the invention is given the reference number 10 in its entirety.
  • connection terminal 10 is in figure 1 shown in perspective view.
  • the connection terminal 10 according to the invention is, for example, an SMD component (surface mount device) which is applied to printed circuit boards (not shown here) in order to ensure the voltage supply and the supply of control signals to electrical or electronic components mounted on the printed circuit board.
  • SMD component surface mount device
  • connection terminal 10 is a connection terminal 10 without a housing, ie a connection terminal 10 which is not surrounded by an insulating housing.
  • the terminal 10 according to the invention figure 1 initially comprises a contact cage 11, which essentially has an outer contour in the manner of a rectangular cylinder.
  • the contact cage 11 is formed by a cage floor 12 , a cage top 13 and two cage side walls 14 .
  • the cage side walls 14 are opposite each other and connect the cage floor 12 to the cage ceiling 13.
  • the cage bottom 12, the cage top 13 and the two cage side walls 14 together form a lateral surface of the contact cage 11 and surround a conductor receiving space 15.
  • One of the end faces of the cylindrical contact cage 11 forms a conductor insertion opening 15 and is therefore kept borderless in this exemplary embodiment.
  • the end face could be partially closed by an end wall.
  • the conductor insertion opening 15 is surrounded by the cage top 13 and the cage side walls 14 as well as the cage floor 12, with the cage floor 12 forming a guide zone 16 which extends from the conductor insertion opening 15 in the direction of the opposite end of the contact cage and forms an inclined guide surface 17.
  • the cage cover 13 is provided with two access openings 18 through which an opening tool can enter the contact cage 11 .
  • the gripping openings 18 are arranged in the transition area to the respective cage side wall 14 so that a web-like section of the cage top 13 remains between the gripping openings 18 lying opposite one another.
  • the cage side walls have openings 19 lying opposite one another. On the one hand, these serve to mount a spring element 30 of the connection terminal 10 in the contact cage 11. On the other hand, the gripping openings 18 in the cage cover 13 merge into the openings 19 in the side walls 14 of the cage. One can therefore also speak of the fact that the engagement openings 18 extend into the respective side wall 14 of the cage.
  • the contact cage has a so-called normal cross-sectional contour, which essentially extends from the end face forming the conductor insertion opening 15 to the end of the contact cage opposite this end face. In the exemplary embodiment, this is cylindrical.
  • This normal cross section contour defines the installation space required by the connecting terminal 10 in terms of height and width.
  • the contact cage 11 has a section A, in which the lateral surface of the contact cage is retracted relative to the normal cross-sectional contour. This retracted section is located downstream of the conductor insertion opening 15 or the end face of the contact cage 11 in the conductor insertion direction x and extends in the exemplary embodiment into the area of the engagement openings 18. A more extensive extension, for example into an area that holds the conductor in the connection terminal 10 and is described later Clamping point 21 is, however, readily conceivable.
  • only the cage side walls 14 are offset inwards relative to the normal cross-sectional contour of the contact cage 11 .
  • the drawn-in section leads to the formation of inclined guide surfaces 22 on the side walls in the area of the conductor insertion opening 15.
  • figure 2 shows, in particular in connection with FIG. 1a, that an intermediate wall 24 is arranged between the cage ceiling 13 and the drawn-in cage side wall sections 23. This is inclined so that a roof-like section is formed here.
  • intermediate walls 24 narrows the inner cross section of the contact cage 11 in the region A of the drawn-in lateral surface.
  • further inclined guide surfaces 25 are formed in the region of the conductor insertion opening 15 and merge into the respective intermediate wall 24 .
  • each of the inclined guide surfaces 17 (inclined guide surface of the guide tongue 16), 22 (inclined guide surface of the respective cage side wall 14) and 25 (inclined guide surface of the respective intermediate wall 24) each individually pushes a conductor to be inserted in the direction of a center of the conductor receiving space that is not further marked.
  • the inclined surfaces 17, 22 and 25 form a funnel-like insertion aid that essentially centers the conductor.
  • the figures 3a and 3b show a vertical longitudinal section through the contact cage 11 along the section plane III/III in figure 2 .
  • the Figure 3a shows the contact cage 11 including spring element 30,
  • the Figure 3b shows the contact cage 11 without the spring element 30.
  • the cage cover, a cage side wall with an opening 19 and the cage bottom 12, which forms the guide tongue 16 in the region of the conductor insertion opening 15, are shown.
  • the cross section of the spring element 30 is bent in an approximately U-shape, the leg facing the cage top 13 initially having a bearing section 31 approximately parallel to the cage floor and a clamping section 32 adjoining it.
  • the clamping section 32 is prestressed against the inside of the cage ceiling.
  • the cage ceiling 13 forms accordingly, a counter bearing for the clamping section 32 or the spring element 30 .
  • Counter bearing and clamping section 32 form the clamping point. If a conductor, in particular a connecting cable, is inserted into the conductor insertion device x through the conductor insertion opening 15 into the conductor receiving space 33, this displaces the clamping section 32 from its in Figure 3a shown starting position in the direction of the cage floor 12. The spring tension generated in this way pushes the end of the conductor against the cage cover 13.
  • the inner surface of this is provided with a profiling - in the present case it is a series of notches 34. This profiling increases - supported by the clamping section 32 - the friction between the conductor and the cage cover 13 and thus improves the hold of the conductor in the connection terminal 10.
  • the conductor accommodating space 33 is an area that extends between the plane of the support section 31 and the cage ceiling. In the exemplary embodiment shown, it therefore lies above a horizontal longitudinal plane of the cage, which is spanned approximately by the surface of the support section 31 .
  • the contact cage 10 has a rear wall 35. On the one hand, this stabilizes the cage construction against deformation. On the other hand, it prevents larger dirt particles from penetrating, which could get caught between the clamping section 32 and the cage floor 12 and thus make it more difficult for the clamping section 32 to escape.
  • connection terminal 10 with inclined surfaces 17, 22, 25 for easier insertion of conductors into the connection terminal 10 and centering of the conductors in the connection terminal 10, without taking up the space required for the connection terminal 10 enlarge.
  • This is achieved in that a region of the contact cage 11 downstream of the conductor insertion opening 15 is drawn in relative to its normal cross-sectional contour is. This improves the centering of the conductors in the terminal point, particularly in the case of fully automated wiring, in which a conductor that has been mechanically inserted into the connection terminal 10 is displaced in the direction of the center of the terminal point, despite an off-center positioning of the assembly tool.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Claims (5)

  1. Borne de connexion (10)
    - avec une cage de contact (11) qui comporte un fond de cage (12), un plafond de cage (13) et deux parois latérales de cage (14) opposées entre elles, reliant chacune le fond de cage (12) avec le plafond de cage (13), qui forment ensemble une surface extérieure et entourent un espace de réception de conducteur (33),
    - avec un point de serrage (21) formé d'au moins un élément de ressort (30) et une butée qui sert à retenir et à assurer la mise en contact électrique d'un conducteur électrique,
    - avec une ouverture frontale d'insertion de conducteur (15) qui est entourée par les parois latérales de cage (14), le plafond de cage (13) et le fond de cage (12) et à travers laquelle le conducteur électrique peut être inséré dans l'espace de réception de conducteur (33) et atteindre le point de serrage (21),
    - avec un axe longitudinal de cage de contact orienté dans la direction d'insertion du conducteur,
    - avec un contour de section perpendiculaire, en particulier cylindrique, de la cage de contact (11) qui s'étend sensiblement de la face frontale de la cage de contact (11) jusqu'à une extrémité opposée de la cage de contact (11) à la face frontale,
    dans laquelle
    - la surface extérieure de la cage de contact (11) est enfoncée dans une zone située derrière l'ouverture d'insertion de conducteur (15) dans le sens d'insertion et rétrécit l'espace de réception de conducteur (33),
    - le point de serrage (21) de la cage de contact (11) est situé, dans le sens d'insertion de conducteur (x), derrière la surface extérieure enfoncée,
    - le fond de cage (12) forme une languette qui s'étend à partir de l'ouverture d'insertion de conducteur (15) en direction de l'extrémité de la cage de contact (11) et offre une surface inclinée de guidage (17, 22, 25),
    - du fait de la surface extérieure enfoncée est formée une surface inclinée de guidage (17, 22, 25) disposée à l'intérieur du contour de section perpendiculaire qui transfère un
    Conducteur (15) à insérer dans la borne de connexion (10) dans la direction de l'axe longitudinal de la cage de contact, la surface inclinée de guidage étant formée par une paroi latérale de cage et
    - la cage de contact présente une ouverture d'engagement (18) destinée à un outil d'ouverture, laquelle permet d'accéder à l'élément de ressort (30), caractérisée en ce que
    - les deux parois latérales de cage (14) constituent chacune une surface inclinée de guidage (17, 22, 25),
    - les surfaces inclinées de guidage (17, 22, 25) forment avec le plafond de cage (13) un cône d'insertion situé derrière l'ouverture d'insertion dans la direction d'insertion,
    - la surface extérieure de la cage de contact (11) est enfoncée dans la zone située derrière dans la direction d'insertion par un déplacement sur les deux côtés des parois latérales de cage (14) vers l'intérieur dans la direction de l'axe longitudinal de la cage,
    - la zone enfoncée de la surface extérieure de la cage de contact (11) s'étend jusque dans la zone des ouvertures d'engagement (18) et rétrécit l'espace de réception de conducteur (33),
    et que
    le plafond de cage (13) présente dans la zone de transition avec chacune des parois latérales (14) une ouverture d'engagement (18) destinée à un outil d'ouverture, laquelle permet l'accès à l'élément de ressort (30).
  2. Borne de connexion (10) selon la revendication 1, caractérisée en ce qu'il est prévu l'outil d'ouverture dont les éléments actifs insérés dans les ouvertures d'engagement (18) sont disposés devant le point de serrage (21) dans le sens d'insertion du conducteur et rétrécissent encore l'espace de réception de conducteur (33) par rapport à la surface extérieure enfoncée et guident de plus le conducteur à insérer dans la direction de l'axe longitudinal de la cage de contact.
  3. Borne de connexion (10) selon la revendication 2, caractérisée en ce que les ouvertures d'engagement (18) s'étendent partiellement jusque dans la paroi latérale (14) correspondante.
  4. Borne de connexion (10) selon les revendications précédentes, caractérisée en ce que dans la zone de surface extérieure enfoncée, entre le plafond de cage et au moins une paroi latérale (14), est disposée une paroi intermédiaire posée en biais (24) qui relie le plafond de cage (13) et la paroi latérale (14), une paroi intermédiaire posée en biais (24) étant de préférence disposée entre le plafond de cage (13) et chacune des parois latérales (14).
  5. Borne de connexion (10) selon les revendications précédentes, caractérisée en ce que la surface intérieure du plafond de cage (13) est dotée dans la zone du point de serrage (21) d'un profilage, en particulier avec des rainures qui servent à améliorer la retenue du conducteur dans la zone de serrage (21).
EP20187941.8A 2019-09-26 2020-07-27 Terminal de connexion pour l'entonnoir d'insertion Active EP3799211B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019125895.2A DE102019125895B4 (de) 2019-09-26 2019-09-26 Anschlussklemme mit Einführtrichter

Publications (2)

Publication Number Publication Date
EP3799211A1 EP3799211A1 (fr) 2021-03-31
EP3799211B1 true EP3799211B1 (fr) 2022-10-05

Family

ID=71833247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20187941.8A Active EP3799211B1 (fr) 2019-09-26 2020-07-27 Terminal de connexion pour l'entonnoir d'insertion

Country Status (5)

Country Link
US (1) US11217910B2 (fr)
EP (1) EP3799211B1 (fr)
CN (1) CN112563767B (fr)
DE (1) DE102019125895B4 (fr)
PL (1) PL3799211T3 (fr)

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Publication number Priority date Publication date Assignee Title
DE102019125895B4 (de) * 2019-09-26 2021-06-10 Bjb Gmbh & Co. Kg Anschlussklemme mit Einführtrichter

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Also Published As

Publication number Publication date
DE102019125895A1 (de) 2021-04-01
CN112563767B (zh) 2022-05-31
US20210098901A1 (en) 2021-04-01
PL3799211T3 (pl) 2023-01-30
EP3799211A1 (fr) 2021-03-31
US11217910B2 (en) 2022-01-04
DE102019125895B4 (de) 2021-06-10
CN112563767A (zh) 2021-03-26

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