EP4498528A1 - Borne monobloc à ressort pour au moins un conducteur électrique - Google Patents

Borne monobloc à ressort pour au moins un conducteur électrique Download PDF

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Publication number
EP4498528A1
EP4498528A1 EP23188465.1A EP23188465A EP4498528A1 EP 4498528 A1 EP4498528 A1 EP 4498528A1 EP 23188465 A EP23188465 A EP 23188465A EP 4498528 A1 EP4498528 A1 EP 4498528A1
Authority
EP
European Patent Office
Prior art keywords
clamping
section
unit
connection module
spring
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.)
Granted
Application number
EP23188465.1A
Other languages
German (de)
English (en)
Other versions
EP4498528B1 (fr
EP4498528C0 (fr
Inventor
Andreas Poos
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.)
K & N Schalterentwicklungsgesellschaft MBH
K and N Schalterentwicklungsgesellschaft mbH
Original Assignee
K & N Schalterentwicklungsgesellschaft MBH
K and N Schalterentwicklungsgesellschaft mbH
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 K & N Schalterentwicklungsgesellschaft MBH, K and N Schalterentwicklungsgesellschaft mbH filed Critical K & N Schalterentwicklungsgesellschaft MBH
Priority to EP23188465.1A priority Critical patent/EP4498528B1/fr
Publication of EP4498528A1 publication Critical patent/EP4498528A1/fr
Application granted granted Critical
Publication of EP4498528B1 publication Critical patent/EP4498528B1/fr
Publication of EP4498528C0 publication Critical patent/EP4498528C0/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
    • H01R4/4811—Spring details
    • H01R4/4814—Self-latching arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
    • H01R11/09—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations being identical
    • 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
    • H01R4/4823—Multiblade spring
    • 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
    • H01R4/4828—Spring-activating arrangements mounted on or integrally formed with the spring housing
    • H01R4/4833—Sliding arrangements, e.g. sliding button

Definitions

  • the present invention relates to a one-piece spring-loaded terminal for at least one electrical conductor, comprising at least one connection module, wherein the respective connection module comprises a clamping unit and a trigger unit, wherein the respective clamping unit has a clamping section for contacting and clamping an electrical conductor and a clamping spring section in order to force the clamping section into an end position with a spring force in a triggered state of the respective connection module, wherein the respective clamping unit further has an actuating surface section, wherein by pressing on the actuating surface section against the spring force of the clamping spring section, the connection module can be brought from the triggered state into a pre-tensioned state, wherein in the pre-tensioned state the clamping section is held in position by a holding tongue of the respective trigger unit located in a holding position, wherein the respective trigger unit further comprises a trigger surface section and a trigger spring section, wherein by pressing on the trigger surface section against a spring force of the trigger spring section, the holding tongue can be brought from the holding position into
  • Spring-loaded terminals are widely used in control cabinet construction and allow for quick and screwless wiring.
  • an aid slotd screwdriver or similar tool
  • more advanced versions have been used that are equipped with some form of trigger or release mechanism. This allows the spring-loaded terminal to be pre-tensioned or "pulled up" using a screwdriver - there are also versions that do not require any tools at all, with an integrated tensioning element, particularly a tensioning lever. After pre-tensioning, no tools are required. As soon as the conductor to be inserted activates a trigger element, the spring-loaded terminal is triggered and clamps the conductor.
  • a disadvantage of the known spring-loaded terminals with a trigger mechanism is that false triggering can occur if the conductor does not exactly touch the intended trigger element when inserted, but first touches another, particularly protruding, element of the trigger mechanism.
  • a further disadvantage of known spring-loaded terminals is that the actual clamping of the conductor is often not carried out with sufficient mechanical precision and stability and the clamped conductor has an imperfect arrangement and/or an undesirably large amount of freedom of movement.
  • a further problem with spring-loaded terminals with trigger mechanisms known from the prior art is that there is usually only one connection point per connection, which is sufficient, in particular, when used in series terminals.
  • Other applications require several connection points per connection, so that several conductors can be clamped per connection - i.e. with one and the same spring-loaded terminal.
  • the clamped conductors are then electrically connected to one another via the spring-loaded terminal and/or via a housing and/or an additional, electrically conductive element against which housing and/or element the clamped conductors are pressed.
  • Such an application arises, for example, with cam or control switches, where there are two connection points per connection.
  • Another application example is distribution blocks with more than two connection points, e.g. with 8 connection points for clamping 8 electrical conductors.
  • the object of the present invention to provide a spring-loaded terminal that avoids the above-mentioned disadvantages.
  • the spring-loaded terminal should prevent false triggering.
  • the spring-loaded terminal should enable clamping with a well-defined arrangement and/or with high mechanical stability or as little movement as possible for the respective conductor.
  • the spring-loaded terminal should enable clamping of several conductors per connection.
  • a one-piece spring-loaded terminal for at least one electrical conductor comprising at least one connection module
  • the respective connection module comprises a clamping unit and a trigger unit
  • the respective clamping unit has a clamping section for contacting and clamping an electrical conductor and a clamping spring section in order to force the clamping section into an end position with a spring force in a triggered state of the respective connection module
  • the respective clamping unit further has an actuating surface section, wherein by pressing on the actuating surface section against the spring force of the clamping spring section, the connection module can be brought from the triggered state into a pre-tensioned state, wherein in prestressed state, the clamping section is held in position by a holding tongue of the respective trigger unit located in a holding position
  • the respective trigger unit further comprises a trigger surface section and a trigger spring section, wherein by pressing on the trigger surface section against a spring force of the trigger spring section, the holding tongue can be brought from the holding
  • contacting or “contacting” is generally understood to mean mechanical contact. This may be accompanied by electrical contact, which will then be indicated separately.
  • the at least one electrical conductor for which the one-piece spring clamp terminal is suitable can be one or more stranded conductors and/or one or more single-core conductors.
  • connection module is used to connect a conductor and provides a connection point as mentioned above for the respective conductor.
  • the spring-loaded terminal is arranged at least in sections, in particular at least with its at least one connection module, in a corresponding housing in the broadest sense.
  • the clamping of the respective conductor with the respective clamping section can in this case take place in conjunction with the housing, whereby the housing forms a counter bearing or part of a counter bearing.
  • the end position When pushing the clamping section of the respective connection module into the associated end position, the end position is not to be understood as a fixed or always the same value, but rather such that the conductor is clamped with a certain force, whereby the force can depend, for example, on the geometry of the conductor and thus on how far the clamping section is deflected against the spring force of the clamping spring section compared to a "free" end position without conductor and housing.
  • pushing into the end position is to be understood as "in the direction of an end position” if the end position cannot be assumed because, for example, a housing and/or a conductor is blocking the assumption of the end position.
  • the respective clamping section can press against the respective conductor in the triggered state, especially when the latter is inserted into the said housing.
  • An actuating element can be provided for pressing on the actuating surface portion, which can be a separate tool (for example any screwdriver) or an element of a system comprising the spring-loaded clamp, for example a movable pin or lever.
  • the respective clamping section In the pre-tensioned state, the respective clamping section is held in position by the respective retaining tongue against the spring force of the respective clamping spring section.
  • the pressing on the respective trigger surface section is carried out by means of the respective conductor to be clamped, especially when this is inserted into the housing mentioned.
  • the spring force of the trigger spring section which must be overcome in order to push the retaining tongue into the release position, must be designed to be correspondingly small.
  • the retaining tongue of the trigger unit of the respective connection module in the pre-tensioned state By countersunk the retaining tongue of the trigger unit of the respective connection module in the pre-tensioned state into the respective recess, it is ensured that the retaining tongue does not protrude or at most protrudes insignificantly.
  • the retaining tongue creates a surface that is essentially flush with the clamping section in the pre-tensioned state. This means that the retaining tongue does not represent any obstacle for the conductor to be inserted, so that false triggering before the conductor touches the trigger surface section is reliably avoided.
  • the shapes of the retaining tongue and the recess are clearly coordinated in such a way that problem-free pre-tensioning is ensured and the clamping section can slide along the retaining tongue, whereby the clamping section presses the retaining tongue away against the spring force of the release spring section until the retaining tongue snaps back into the holding position.
  • the respective recess can be produced by pressing, in particular embossing, the respective clamping section.
  • other manufacturing methods are of course also conceivable, such as the material-locking joining of several individual parts to form a clamping section with recess or to form a one-piece spring clamp with the aforementioned clamping section.
  • centering embossing refers to an embossing or depression whose shape is designed to center the conductor to be clamped during clamping.
  • the one-piece spring clamp is typically made of a spring-elastic or spring-hard material, preferably metal, particularly preferably steel or a spring-hard steel alloy (also referred to as spring steel) or a copper alloy such as spring-hard bronze, in order to ensure reliable clamping of the conductor, whereby the conductor is mechanically contacted.
  • metal particularly preferably steel or a spring-hard steel alloy (also referred to as spring steel) or a copper alloy such as spring-hard bronze
  • the desired spring forces of the clamping spring section on the one hand and the release spring section on the other hand can be adjusted by appropriate shaping or bending and/or thermal treatment.
  • the one-piece spring clamp does not have to be electrically conductive.
  • electrical conductivity can be present, for example if the spring clamp is made from one of the materials mentioned above as examples.
  • the clamping section can (also) make electrical contact with the conductor.
  • a separate electrically conductive element a so-called contact piece, is provided for electrically contacting the clamped conductor, which is arranged at least in sections in the above-mentioned housing and can form the above-mentioned counter bearing at least in sections.
  • the spring clamp is usually used in a housing.
  • the invention also provides a system with a one-piece spring clamp according to the invention and at least one clamping chamber body, wherein each connection module of the one-piece spring clamp is in each case in an associated clamping chamber unit of the at least one clamping chamber body is arranged and wherein the respective clamping chamber unit has an insertion opening through which the respective electrical conductor can be inserted into the respective clamping chamber unit such that it presses against the trigger surface section of the trigger unit of the respective connection module in the prestressed state in order to transfer the respective connection module into the triggered state and to contact and clamp the respective electrical conductor with the clamping section of the respective connection module.
  • the at least one clamping chamber body with the at least one clamping chamber unit takes on the function of the housing described above. If there are several clamping chamber units, these can be formed by one or more clamping chamber bodies.
  • the at least one clamping chamber body can be a, in particular integral, component of an electrical installation device (i.e. an electrotechnical installation device), for example a switching device, in particular a control or cam switch, or a terminal.
  • an electrical installation device i.e. an electrotechnical installation device
  • a switching device in particular a control or cam switch, or a terminal.
  • connection module The prerequisite for triggering the connection module is that the respective connection module is in the pre-tensioned state when the respective electrical conductor is inserted into the clamping chamber unit assigned to the connection module.
  • the electrical conductor can press against the trigger surface section and thus trigger the connection module or bring it into the triggered state.
  • clamping the respective electrical conductor with the respective clamping section serves to clamp it firmly.
  • the clamping chamber unit forms at least part of a counter bearing against which the clamping section presses the electrical conductor, possibly with one or more additional components in between - in particular an (electrically conductive) contact piece intended for electrical contact with the conductor.
  • the retaining tongue of the trigger unit and the recess of the clamping unit of the respective connection module are designed in such a way that in the pre-tensioned state the retaining tongue is hooked into the recess. This creates a barb effect that reliably prevents the connection module in the pre-tensioned state from releasing itself and being transferred from the pre-tensioned to the triggered state without actuating the trigger surface section or pressing against the trigger surface section. This improves the prevention of false triggering.
  • a particularly preferred embodiment of the one-piece spring clamp according to the invention provides that the recess has a holding surface and the holding tongue has an engagement surface, wherein in the pre-tensioned state the engagement surface contacts the holding surface and forms an angle of at most 30°, preferably at most 10°, with it.
  • said angle is essentially 0°, so that the engagement surface and the holding surface are essentially parallel to one another and in particular contact one another over a surface area.
  • the recess of the clamping unit of the respective connection module has two boundary walls, between which the retaining tongue of the release unit of the respective connection module is arranged in the pre-tensioned state.
  • the boundary walls are opposite one another and serve on the one hand for the lateral Shielding of the retaining tongue when the retaining tongue is sunk into the recess in the pre-tensioned state of the respective connection module. This means that the boundary walls further reduce the possibility of false triggering.
  • the boundary walls are designed so that the conductor to be clamped is arranged between them at least in sections during clamping - depending on the lateral size or diameter. This means that the boundary walls limit possible lateral movements of the conductor to be clamped or clamped accordingly. On the one hand, this increases the mechanical stability and precision when clamping the respective conductor. On the other hand, this achieves a certain centering of the respective electrical conductor, so that the arrangement of the clamped conductor is perfected or a desired arrangement of the clamped conductor is ensured as far as possible.
  • the number of mechanical contact points or clamping points between the respective conductor and the respective clamping section can be increased by the respective electrical conductor not only touching - and being clamped to - a surface of the clamping section arranged between the boundary walls, in particular the aforementioned holding surface, but also touching at least one of the boundary walls.
  • the respective conductor usually has a round - not necessarily circular - cross-section, the respective resulting contact surfaces between the conductor and the clamping section are correspondingly relatively small or even almost point-shaped and are therefore referred to here and below as clamping points. Consequently, the mechanical stability between the clamped electrical conductor and the clamping section or the one-piece spring clamp is further improved.
  • a contact surface for the electrical conductor is arranged between the two boundary walls, which connects the two boundary walls to one another and points in the direction of a free end of the clamping section.
  • the free end of the clamping section can be formed at least in sections by the surface of the clamping section arranged between the boundary walls, with which the respective conductor is clamped, in particular by the aforementioned holding surface.
  • the contact surface helps to center the respective electrical conductor when it is inserted by the conductor first touching the contact surface and then sliding off it so that it is positioned between the two boundary walls. If the conductor has sufficient strength or rigidity, it presses against the spring force of the clamping spring section and moves the clamping section in the direction of its pre-tensioned state, while the conductor slides along the contact surface or clamping section until it slides off the free end of the clamping section, whereupon the conductor is clamped by the clamping section, which is pushed into its end position by the spring force of the clamping spring section.
  • the one-piece spring clamp can also be used in this way in the manner of a push-in variant mentioned at the beginning.
  • the contact surface is not perpendicular to an upper side of the clamping section pointing away from the retaining tongue, but forms an acute angle with this upper side.
  • the contact surface is preferably flat.
  • a curved design would of course also be conceivable, in particular a contact surface that is concavely curved relative to the free end of the clamping section, preferably with continuous and curved transitions to the holding surface and to the boundary walls in order to further improve the guidance and centering of the conductor when it is inserted.
  • the actuating surface section of the clamping unit of the respective connection module is designed to be flat and adjoins the clamping section, wherein the actuating surface section and the clamping section enclose an obtuse angle.
  • this geometry can facilitate the reliable actuation or pressing of the actuating surface section, in particular by means of the actuating element.
  • this geometry promotes the reliable triggering of the pre-tensioned connection module and thus the reliable clamping of the respective electrical conductor when the actuating element in the pre-tensioned state continues to contact the actuating surface section or at least remains arranged in its immediate vicinity, so that the actuating element is in any case contacted and moved by the actuating surface section when the connection module is triggered or transferred to the triggered state.
  • the said geometry can also effectively enlarge the resilient area without the clamping spring section itself having to be enlarged.
  • the actuating surface section of the clamping unit of the respective connection module is arranged between the clamping section and the clamping spring section, wherein the clamping spring section has a curved section and a flat section immediately adjacent thereto and the curved section is arranged between the flat section and the actuating surface section.
  • the clamping spring section has a curved section and a flat section immediately adjacent thereto and the curved section is arranged between the flat section and the actuating surface section.
  • the bent section ensures that the clamping spring section is long enough so that it is deformed purely elastically. At the same time, the clamping spring section is kept short enough to generate a sufficiently high clamping force, in particular to be able to clamp or hold the conductor securely.
  • the bent section can be manufactured in a manner known per se.
  • heat treatment can be provided during manufacture after a bending process in order to ensure high elasticity even after the bending process.
  • the actuating surface section does not have to be directly connected to the curved section of the clamping spring section.
  • a tight bend can be arranged between the actuating surface section and the curved section of the clamping spring section, but this typically has little until nothing contributes to the elastic behavior of the clamping spring section.
  • the release spring section of the release unit of the respective connection module is arranged between the release surface section and the clamping spring section and preferably has two flat band springs arranged parallel to one another.
  • the release spring section can be dimensioned very easily in this way, whereby, as mentioned, no particularly large, but only a relatively small spring force should or must be achieved.
  • the fact that no higher spring forces of the release spring section are required is also due to the fact that the spring force of the release spring section is hardly or not at all required to hold the retaining tongue in the recess.
  • a preferred embodiment of the one-piece spring clamp according to the invention provides that several, preferably two, connection modules and at least one connection unit is provided, wherein two consecutive connection modules are connected to one another by a connection unit which is arranged between the clamping units on the one hand and the trigger units of the two consecutive connection modules on the other.
  • connection unit results in a mechanical decoupling of the spring elements, in particular the clamping spring sections and release spring sections, of the successive connection modules. Accordingly, electrical conductors can be reliably clamped using the connection modules without the release and clamping behavior of one of the connection modules influencing the release and clamping behavior of another of the connection modules.
  • each connection unit comprises a connecting web that extends between the two consecutive connection modules that are connected to one another by the respective connection unit.
  • the connecting web of the connection unit can be used to achieve a mechanically stable connection between the consecutive connection modules.
  • the respective connecting unit can also be completely formed by the respective connecting web or can consist of it.
  • the respective connection unit can of course also comprise other elements than the respective connecting web or further elements apart from the respective connecting web.
  • the respective connection unit can also overlap in sections with the two consecutive connection modules that it connects.
  • the at least one connection unit comprises at least one centering hole, wherein preferably in the respective two consecutive connection modules that are connected to one another by the respective connection unit, one centering hole is provided per connection module, which is arranged between the clamping unit and the trigger unit of the respective connection module.
  • the at least one centering hole proves to be advantageous from a manufacturing point of view, since the one-piece spring clamp or its pre-product can be positioned and held precisely for further processing by at least one projection or the like engaging in the centering hole.
  • the pre-product can, for example, be a fully bent or formed endless chain from which only the one-piece spring clamps with the appropriate number of connection modules have to be separated.
  • the at least one centering hole can also be advantageous when using the one-piece spring clamp in the above-mentioned at least one clamping chamber body with the at least one clamping chamber unit, in that the one-piece spring clamp can be positioned and/or centered exactly in the at least one clamping chamber body with the at least one clamping chamber unit by means of one or more centering lugs that engage in the one or more centering holes.
  • the at least one connection module can be positioned or centered exactly in said clamping chamber unit in this way, ie with a projection or a centering lug in the associated at least one clamping chamber unit.
  • a preferred embodiment of the system according to the invention provides that a contact piece is arranged in the respective clamping chamber unit, wherein a contact section of the contact piece is arranged opposite the clamping section of the clamping unit of the respective connection module when the respective connection module is in the pre-tensioned state in order to enable the respective electrical conductor to be arranged between the clamping section and the contact section when it is introduced into the respective clamping chamber unit, wherein one or more, preferably two, fixing lugs are provided on the contact section.
  • the contact piece with the contact section not only serves for electrical contact, but is also used when clamping the respective conductor by pressing the conductor against the contact section by the clamping section.
  • the respective clamping chamber unit functions at least partially as a counter bearing in that the contact piece or the contact section is supported in or on the clamping chamber unit.
  • the at least one fixing lug causes a locally increased contact pressure when the respective electrical conductor is pressed against the at least one fixing lug during clamping, so that a particularly stable fixation of the conductor is achieved.
  • Several fixing lugs prove to be advantageous in this respect because this reliably prevents the clamped conductor from twisting transversely to its course in the area of the contact section, whereby Two fixing lugs prove to be a particularly economical solution in order to limit or prevent movement of the clamped conductor as best as possible.
  • one (common) contact piece can be provided for several clamping chamber units.
  • several contact pieces are provided for several clamping chamber units, in particular one contact piece per clamping chamber unit.
  • the contact piece can be led out of the at least one clamping chamber unit or the at least one clamping chamber body at at least one point in order to enable an electrical connection from the outside in a manner known per se.
  • the contact piece is led out of one of the clamping chamber units.
  • the at least one contact piece is made of an electrically conductive material, preferably metal, particularly preferably made of copper or a copper alloy or a light metal such as aluminium or an aluminium alloy.
  • an actuating plunger that can be actuated from the outside is provided for each clamping chamber unit in order to be able to press against the actuating surface section of the clamping unit of the respective connection module by moving the actuating plunger parallel to a direction of displacement and thus to be able to bring the respective connection module from the triggered state into the pre-tensioned state, wherein the direction of displacement and a normal vector on the actuating surface section enclose an angle of less than 40°, preferably less than 30°, at a point that can be contacted by the actuating plunger in the pre-tensioned state of the respective connection module.
  • the actuating plunger enables particularly easy and convenient pre-tensioning for the user.
  • the geometric design mentioned above ensures that when the actuating plunger is triggered, the actuating surface section moves it as smoothly as possible anti-parallel to the direction of displacement. This prevents the actuating plunger from becoming jammed, which in turn ensures reliable triggering - and subsequently clamping of the respective electrical conductor.
  • the invention provides a switching device, in particular a cam switch and/or control switch, comprising at least one system according to the invention.
  • a switching device in particular a cam switch and/or control switch, comprising at least one system according to the invention.
  • the switching device can also comprise several one-piece spring-loaded terminals according to the invention.
  • Fig. 1 shows a first embodiment of a one-piece spring clamp 1 according to the invention for at least one electrical conductor 2 (cf. Fig. 10 ) in an axonometric view, wherein a connection module 3 is provided for each electrical conductor 2.
  • the one-piece spring-loaded terminal 1 has two connection modules 3 in the first embodiment shown and can accordingly be used for clamping two electrical conductors 2.
  • Each connection module 3 has a clamping unit 4 and a trigger unit 5, wherein each clamping unit 4 has a clamping section 6 for contacting and clamping the respective electrical conductor 2, cf. Fig. 4 . Furthermore, each clamping unit 4 has a clamping spring section 7 in order to urge the clamping section 6 into an end position with a spring force in a triggered state 9 of the respective connection module 3.
  • Fig. 3 and Fig. 4 each show the triggered state 9 of the connection modules 3 of the first embodiment of the one-piece spring clamp 1, wherein the clamping section 6 is free and also assumes the end position accordingly.
  • each clamping unit 4 has an actuating surface section 8, wherein by pressing on the actuating surface section 8 against the spring force of the clamping spring section 7, the respective connection module 3 can be brought from the triggered state 9 into a pre-tensioned state 10.
  • Fig. 1 and Fig. 2 each show the pre-tensioned state 10 of the connection modules 3 of the first embodiment of the one-piece spring-loaded terminal 1.
  • the clamping section 6 is held in position by a retaining tongue 12 of the respective trigger unit 5, which is located in a holding position 15, cf. Fig. 2 .
  • the respective trigger unit 5 further comprises a trigger surface section 13 and a trigger spring section 14, cf. Fig. 4
  • the retaining tongue 12 can be brought from the holding position 15 into a release position 16 in order to transfer the connection module 3 from the pre-tensioned state 10 into the triggered state 9 by releasing the clamping section 6.
  • the trigger unit 5 with the retaining tongue 12 in the release position 16 is indicated by dashed lines, whereby the trigger unit 5 and thus also the retaining tongue 12 are pressed downwards or bent relative to the rest of the connection module 3 compared to the case in which the retaining tongue 12 is in the holding position 15.
  • the dashed representation accordingly relates to a state of the connection module 3 immediately before the connection module 3 changes from the pre-tensioned state 10 to the triggered state 9.
  • the clamping section 6 of the clamping unit 4 of the respective connection module 3 has a recess 17, which in the illustrated embodiments is designed as an embossing, in particular a centering embossing.
  • the retaining tongue 12 of the trigger unit 5 of the respective connection module 3 is sunk in this recess 17 in the pre-tensioned state 10.
  • each connection module 3 is in an associated clamping chamber unit 31 of at least one clamping chamber body 30 is arranged and the respective clamping chamber unit 31 has an insertion opening 32 through which the respective electrical conductor 2 can be inserted into the respective clamping chamber unit 31 such that it presses against the trigger surface section 13 of the trigger unit 5 of the respective connection module 3 in the prestressed state 10 in order to transfer the respective connection module 3 into the triggered state 9 and to contact and clamp the respective electrical conductor 2 with the clamping section 6 of the respective connection module 3.
  • the one-piece spring clamp 1 is made from a spring-elastic or spring-hard metal, in particular from steel or a spring-hard steel alloy or a copper alloy such as spring-hard bronze.
  • the manufacture from metal facilitates the manufacture of the one-piece spring clamp 1.
  • the desired spring forces of the respective clamping spring section 7 on the one hand and the respective release spring section 14 on the other hand can be set by appropriate shaping or bending and/or thermal treatment.
  • the one-piece spring clamp 1 can easily be produced with any number of connection modules 3, for example by using a rolled endless chain 39, as shown by way of example in Fig. 5 shown, with the large arrow indicating the rolling direction. As shown in Fig. 5 As can be seen, the endless chain 39 already has the punchings necessary for the final shape as well as the embossed recesses 17.
  • connection modules 3 have their actual shape after the bending process, cf. Fig. 6 , which shows a finished endless chain 40, which corresponds to a sequence of interconnected connection modules 3.
  • connection modules 3 In order to now connect the one-piece spring clamps 1 with the desired To produce a large number of connection modules 3, only continuous separation or cutting off after the corresponding number of connection modules 3 is necessary, for example after each connection module 3 or after every second connection module 3 or after every third connection module 3 or after every fourth connection module 3 etc.
  • connection unit 27 is provided for connecting two consecutive connection modules 3.
  • This connection unit 27 is arranged between the clamping units 4 on the one hand and the trigger units 5 of the two consecutive connection modules 3 on the other hand, see e.g. Fig. 4 for the first embodiment shown and e.g. Fig. 7 for a second embodiment shown.
  • the said arrangement of the connecting unit 27 provides a mechanical decoupling of the spring elements, in particular the clamping spring sections 7 and release spring sections 14, of the successive connection modules 3.
  • the connection modules 3 therefore do not influence each other in their release and clamping behavior.
  • each connection unit 27 has a connecting web 28 which extends between the two consecutive connection modules 3 which are connected to one another by the respective connection unit 27, cf. Fig. 7 .
  • connection unit 27 additionally has a centering hole 29 for each connection module 3.
  • the respective centering hole 29 is arranged between the clamping unit 4 and the trigger unit 5 of the respective connection module 3. In the first In this embodiment, however, no centering holes are provided.
  • the centering holes 29 can also be advantageous when using the one-piece spring clamp 1 in the above-mentioned at least one clamping chamber body 30 with the at least one clamping chamber unit 31, in that the one-piece spring clamp 1 can be positioned and/or centered precisely in the at least one clamping chamber body 30 with the at least one clamping chamber unit 31 by means of one or more centering lugs (not shown) which engage in at least one of the centering holes 29.
  • the respective connection module 3 can be positioned or centered precisely in said clamping chamber unit 31 in this way, ie with a projection or a centering lug (not shown) in the associated clamping chamber unit 31.
  • the retaining tongue 12 of the trigger unit 5 and the recess 17 of the clamping unit 4 of the respective connection module 3 are designed in such a way that in the pre-tensioned state 10 the retaining tongue 12 is hooked into the recess 17.
  • This achieves an improved prevention of false triggering by creating a barb effect that reliably prevents the connection module 3 in the pre-tensioned state 10 from releasing itself and from falling out of the prestressed state 10 into the released state 9.
  • the respective recess 17 has a holding surface 18, cf. Fig. 11
  • the retaining tongue 12 has an engagement surface 19, cf. Fig. 7 , wherein in the prestressed state 10 the engagement surface 19 contacts the holding surface 18 and encloses an angle of at most 30°, preferably at most 10°, with the latter.
  • the recess 17 of the clamping unit 4 of the respective connection module 3 has two boundary walls 20, between which the retaining tongue 12 of the trigger unit 5 of the respective connection module 3 is arranged in the pre-tensioned state 10. Accordingly, the boundary walls 20 shield the retaining tongue 12 particularly well at the sides and thus further reduce the possibility of false triggering.
  • boundary walls 20 restrict any possible lateral movement of the conductor 2 to be clamped or clamped.
  • this increases the mechanical stability and precision when clamping the respective conductor 2.
  • this achieves a certain centering of the respective electrical conductor 2, so that the arrangement of the clamped conductor 2 is perfected or a desired arrangement of the clamped conductor 2 is ensured as far as possible.
  • the number of clamping points 11 between the respective conductor 2 and the respective clamping section 6 can be increased by the respective electrical conductor 2 not only touching a surface of the clamping section 6 arranged between the boundary walls 20, in particular the aforementioned holding surface 18, and being clamped thereto, but also touching at least one of the boundary walls 20. Consequently, in particular the mechanical connection between the clamped electrical conductor 2 and the clamping section 6 or the one-piece spring clamp 1, whereby in the embodiments shown, due to the electrically conductive material of the one-piece spring clamp 1, a certain electrical contact or connection between the conductor 2 and the clamping section 6 is also achieved. This is in Fig. 12, Fig. 13 and Fig.
  • the contact piece 33 is made of an (electrically conductive) metal, preferably copper or a copper alloy, although other metals or metal alloys, in particular light metals such as aluminum or aluminum alloys, are also conceivable as materials.
  • the contact piece 33 serves to electrically contact or connect the conductor 2 and is also used when clamping the respective conductor 2, in that the conductor 2 is pressed by the clamping section 6 against the contact section 34 of the contact piece 33.
  • the electrical conductor 2 is single-core and has an essentially circular cross-section.
  • the cross-sectional dimension or the diameter of the circular cross-section is so small that the electrical conductor 2 in its central arrangement between the boundary walls 20 does not touch them.
  • Fig. 13 there is a Fig. 12 An analogous case is present, but the electrical conductor 2 has a slightly larger diameter, so that the electrical conductor 2 touches both boundary walls 20. Accordingly, in addition to the clamping point 11 on the holding surface 18, two clamping points 11 on the boundary walls 20 are formed between the electrical conductor 2 and the clamping section 6. In addition, in this case, there is also a clamping point 11' for electrical and mechanical contact between the electrical conductor 2 and the contact section 34 of the contact piece 33, which runs straight in the sectional view.
  • Fig. 14 a case is shown in which the electrical conductor 2 is constructed in a multi-core manner with nineteen wires 41.
  • Three of these wires 41 each have a clamping point 11 with the holding surface 18.
  • Two further wires 41 each have a clamping point 11 with one of the boundary walls 20, so that a total of five clamping points 11 are formed between the conductor 2 and the clamping section 6.
  • five further wires 41 each have a clamping point 11' with the contact section 34 of the contact piece 33, which runs straight in the sectional view, so that a total of five clamping points 11' are formed for electrical and mechanical contact between the conductor 2 and the contact section 34.
  • a substantially flat contact surface 21 for the electrical conductor 2 is arranged between the two boundary walls 20, which connects the two boundary walls 20 to one another and points in the direction of a free end 22 of the clamping section 6, wherein the holding surface 18 forms part of the free end 22.
  • the contact surface 21 helps to center the respective electrical conductor 2 when it is introduced into the respective clamping chamber unit 31, in that the conductor 2 first touches the contact surface 21 and slides along it so that it is arranged between the two boundary walls 20.
  • the conductor 2 if it has sufficient strength or rigidity for this, presses against the spring force of the clamping spring section 7 and moves the clamping section 6 in the direction of its pre-tensioned state 10, while the conductor 2 slides along the contact surface 21 or the clamping section 6 until it slides off the free end 22 of the clamping section 6, whereupon the clamping of the conductor 2 by the clamping section 6, which is pushed into its end position by the spring force of the clamping spring section 7, takes place.
  • the one-piece spring clamp 1 can also be used in the manner of a push-in variant mentioned at the beginning.
  • the contact surface 21 is not perpendicular to an upper side 23 of the clamping section 6 pointing away from the retaining tongue 12, but rather forms an acute angle with this upper side 23.
  • Fig. 4 and Fig. 8 As can be seen, in the illustrated embodiments of the one-piece spring-loaded terminal 1, the actuating surface section 8 of the clamping unit 4 of the respective connection module 3 is designed to be flat and adjoins the clamping section 6, wherein the actuating surface section 8 and the clamping section 6 form an obtuse angle. This facilitates the actuation or pressing of the actuating surface section 8 by means of an actuating element, which in the illustrated embodiments is designed as an actuating plunger 36, cf. Fig. 9 and Fig. 10 .
  • an actuating element which in the illustrated embodiments is designed as an actuating plunger 36, cf. Fig. 9 and Fig. 10 .
  • an externally operable actuating plunger 36 is provided for each clamping chamber unit 31 in order to press against the actuating surface section 8 of the clamping unit 4 of the respective connection module 3 by moving the actuating plunger 36 parallel to a direction of displacement 37 and thus to be able to bring the respective connection module 3 from the triggered state 9 into the pre-tensioned state 10.
  • the direction of displacement 37 and a normal vector 38 on the actuating surface section 8 at a point that the actuating plunger 36 contacts or can contact in the pre-tensioned state 10 of the respective connection module 3 enclose an angle ⁇ of less than 40°, preferably less than 30°, cf. Fig. 10 .
  • This geometric design ensures that when the actuating plunger 36 is triggered, it is moved as smoothly as possible by the actuating surface section 8 in an anti-parallel direction to the direction of displacement 37. Wedging of the actuating plunger 36 can thus be avoided, which in turn ensures reliable triggering - and subsequently clamping of the respective electrical conductor 2.
  • Fig. 4 combined with Fig. 7
  • the actuating surface section 8 of the clamping unit 4 of the respective connection module 3 is arranged between the clamping section 6 and the clamping spring section 7, wherein the clamping spring section 7 has a curved section 24 and a flat section 25 immediately adjacent thereto and the curved section 24 is arranged between the flat section 25 and the actuating surface section 8.
  • the curved section 24 ensures that the clamping spring section 7 has a sufficient length so that it can be used purely is elastically deformed.
  • the actuating surface section 8 connected between the clamping section 6 and the clamping spring section 7 effectively enlarges the resilient area without the clamping spring section 7 itself having to be enlarged, with a tight bend still being arranged between the actuating surface section 8 and the bent section 24, which, however, contributes little to nothing to the elastic behavior of the clamping spring section 7.
  • the clamping spring section 7 is kept short enough to generate a sufficiently high clamping force, in particular to be able to clamp or hold the conductor 2 securely.
  • Fig. 4 combined with Fig. 8
  • the trigger spring section 14 of the trigger unit 5 of the respective connection module 3 is arranged between the trigger surface section 13 and the clamping spring section 7 and has two flat band springs 26 arranged parallel to one another.
  • the trigger spring section 14 is thus very lightly dimensioned, whereby no particularly large, but only a relatively small spring force should or must be achieved, in particular because due to the barb effect described above, practically no spring force is required to hold the retaining tongue 12 in the recess 17.
  • a contact piece 33 is provided in each clamping chamber unit 31 in order to reliably electrically contact the respective clamped electrical conductor 2 and to be able to establish an electrical connection with the clamped electrical conductor 2.
  • the contact section 34 of the contact piece 33 is arranged opposite the clamping section 6 of the clamping unit 4 of the respective connection module 3 when the respective connection module 3 is in the pre-tensioned state 10 to enable the respective electrical conductor 2 to be arranged between the clamping section 6 and the contact section 34 when it is inserted into the respective clamping chamber unit 31, see in particular Fig. 10 .
  • two fixing lugs 35 are provided on the contact section 34, see. Fig. 9 .
  • the contact piece 33 with the contact section 34 not only serves for electrical contact, but is also used when clamping the respective conductor 2, in that the conductor 2 is pressed by the clamping section 6 against the contact section 34.
  • the respective clamping chamber unit 31 functions at least partially as a counter bearing, in that the contact piece 33 or the contact section 34 is supported in or on the clamping chamber unit 31.
  • the two fixing lugs 35 each cause a locally increased contact pressure when the respective electrical conductor 2 is pressed against the fixing lug 35 during clamping, so that a particularly stable fixation of the conductor 2 is achieved.
  • twisting of the conductor 2 transversely to its course in the area of the contact section 34 is reliably prevented.
  • a single (common) contact piece 33 is provided for all clamping chamber units 31, which is led out of one of the clamping chamber units 31 or out of the clamping chamber body 30 at only one point (in Fig. 9 and Fig. 10 bottom left) to enable electrical connection from the outside in a conventional manner.
  • the system shown can be part of a switching device (not shown), in particular a cam and/or control switch.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP23188465.1A 2023-07-28 2023-07-28 Borne monobloc à ressort pour au moins un conducteur électrique Active EP4498528B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23188465.1A EP4498528B1 (fr) 2023-07-28 2023-07-28 Borne monobloc à ressort pour au moins un conducteur électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23188465.1A EP4498528B1 (fr) 2023-07-28 2023-07-28 Borne monobloc à ressort pour au moins un conducteur électrique

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EP4498528A1 true EP4498528A1 (fr) 2025-01-29
EP4498528B1 EP4498528B1 (fr) 2025-06-11
EP4498528C0 EP4498528C0 (fr) 2025-06-11

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004001202A1 (de) * 2003-01-08 2004-07-22 Bals Elektrotechnik Gmbh & Co. Kg Leiteranschlussklemme, insbesondere für Steckverbinder
WO2021105280A1 (fr) * 2019-11-28 2021-06-03 Weidmüller Interface GmbH & Co. KG Borne à ressorts de conducteur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004001202A1 (de) * 2003-01-08 2004-07-22 Bals Elektrotechnik Gmbh & Co. Kg Leiteranschlussklemme, insbesondere für Steckverbinder
WO2021105280A1 (fr) * 2019-11-28 2021-06-03 Weidmüller Interface GmbH & Co. KG Borne à ressorts de conducteur

Also Published As

Publication number Publication date
EP4498528B1 (fr) 2025-06-11
EP4498528C0 (fr) 2025-06-11

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