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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/46—Bases; Cases
  • H01R13/502—Bases; Cases composed of different pieces
  • H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
• • 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
• • 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
  • H01R4/70—Insulation of connections
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
  • H01R9/22—Bases, e.g. strip, block, panel
  • H01R9/24—Terminal blocks
  • H01R9/2416—Means for guiding or retaining wires or cables connected to terminal blocks
• • 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
  • H01R4/485—Single busbar common to multiple springs

Definitions

• the invention relates to a conductor terminal for clamping electrical conductors, comprising an insulating housing and a contact element.
• the contact element comprises a sheet metal part with at least one clamping spring arranged thereon.
• the insulating housing has at least one conductor entry channel leading to a respective clamping spring.
• An opening is provided in the sheet metal part for receiving an electrical conductor inserted into an associated conductor entry channel.
• DE 40 03 701 A1 shows a device connection terminal with a contact insert sheet that is bent into a V-shape toward the clamping leg section, forming a hollow. This creates a shaped surface of the contact insert sheet that directly represents one side half of a socket part of a plug connection integrated into the device connection terminal.
• DE 196 54 523 A1 discloses a conductor connection terminal formed from a busbar rod and a spring steel sheet from which leaf springs are punched out in the manner of tongues, the punched-out tongue ends of which are directed towards the busbar rod.
• DE 10 2006 010309 A1 discloses a box terminal, wherein the box terminal has two opposing contact elements that are electrically connected to each other via a separate insert.
• the box terminal has conductor entry channels that act as release buttons for an electrical conductor.
• DE 10 2014 102517 A1 shows a spring-loaded terminal contact for contacting electrical conductors with at least one busbar and with at least one clamping spring, which has a contact leg, a clamping leg, and a spring arc arranged between the contact leg and the clamping leg.
• the clamping leg extends towards the busbar and has a spring clamping edge for clamping an electrical conductor inserted between the clamping leg and the busbar in a conductor insertion direction.
• the busbar has a clamping edge, which, together with the spring clamping edge, forms a clamping point for the electrical conductor to be clamped.
• the busbar has a groove-shaped recess adjacent to the clamping edge in front of the clamping point in the conductor insertion direction.
• US 9 105 991 B1 shows an electrical contact element with a two-part housing, wherein a connecting element between the housing parts forms a clamping area for an electrical conductor.
• the insulating housing has channel side walls that define the conductor insertion channel and extend into the opening. Because the channel side walls now extend into the opening of the sheet metal part, improved guidance, particularly of multi-wire conductors, through the opening is facilitated. The strands are held together beyond the clamping point by means of these channel side walls. When clamping an electrical conductor, migration of the strands, for example due to force applied by the clamping spring, is prevented or at least the risk of migration is reduced by the channel side walls projecting beyond the Provide lateral guidance of the electrical conductor to be clamped beyond the clamping point.
• the cover part has a conductor entry channel defined by the channel side walls.
• the channel side walls of the cover part extend laterally past the clamping spring into the opening in the sheet metal part. This opening is the window left by exposing the clamping spring from the sheet metal part, which is defined by two side webs.
• the channel side walls protrude behind the sheet metal part in the conductor insertion direction and extend into a conductor retention pocket. This provides lateral guidance for an electrical conductor to be clamped beyond the clamping point.
• the clamping spring is centered and guided laterally.
• the sheet metal part can be bent over in the area of the opening.
• the channel side walls then protrude through the opening in the bent section of the sheet metal part. This enables a very compact design of the conductor connection terminal with good conductor routing.
• Each conductor entry channel must have two spaced-apart channel side walls that extend into the opening. This allows the conductor to be routed from both sides.
• the duct side walls can be T-shaped in cross-section, particularly for the outer duct side walls, or H-shaped, i.e., double-T-shaped. These H-shaped duct side walls can be used, in particular, for the adjacent conductor entry ducts. These T- and H-shaped cross-sections increase the stability of the duct side walls while maintaining a compact design.
• the sheet metal part can be curved in the root area.
• the curvature has a groove base of the curvature that is oriented transversely to the main extension direction of the clamping spring. This curvature is not only present in the area of the tongue root of the clamping spring tongue, but also in the adjacent part of the sheet metal part, which merges into the side webs that define the opening. This curvature improves the spring elasticity of the clamping spring after punching.
• the clamping spring is initially bent back in the curvature against the spring force of the clamping spring and then elastically deformed. This can shorten the length of the clamping spring or create a very low-profile conductor connection terminal.
• the curvature causes a multi-strand conductor to come into contact with the elastic part of the clamping spring, particularly when inserting a stranded conductor, so that the clamping spring is already elastically deformed when the electrical conductor is inserted. This reduces the risk of strands of a multi-strand conductor slipping out compared to a conductor connection terminal without this type of curvature. This is also achieved because the curvature increases the spring elasticity of the sheet metal part in the root area of the sheet metal part, allowing the sheet metal part, together with the side webs, to deform elastically when an electrical conductor is clamped.
• the main extension direction of the clamping spring is considered to be the average extension of the clamping spring from the root area of the clamping spring to the clamping end of the clamping spring.
• the main extension direction of the clamping spring can be defined by the area of the clamping spring located in the conductor entry channel between the root area and the support section of the sheet metal part.
• the main extension direction of the clamping spring is defined exclusively by the area of the clamping spring in the conductor entry channel delimited by the side web and the support section of the sheet metal part.
• the sheet metal part is provided with two curvatures in the root area. These two curvatures can be connected to each other and run in opposite directions, i.e., have an S-shape. This reinforces the elastic effect of the clamping spring. Following the first curvature, the second curvature can follow, essentially in the direction of the clamping end of the clamping spring. In the main extension direction of the clamping spring, this S-shaped design creates a kind of parallelism between the clamping spring and the crossbar or the surface of the crossbar facing the conductor entry. The extension of the main extension direction of the The clamping spring is essentially located in the conductor entry channel, i.e. in the area between the support section and the side web or the root area of the clamping spring.
• the first curvature and the second curvature can thus be designed such that the main extension direction of the clamping spring in the non-deflected state of the clamping spring is aligned parallel, i.e. approximately parallel +-10°, to the surface of a transverse web of the sheet metal part adjoining the root region or to the transverse orientation of the transverse web transverse to the longitudinal extension direction of the transverse web or the alignment direction of the clamping springs.
• the groove of the first curvature can be located on the side of the sheet metal part opposite the side of the sheet metal part from which the clamping spring protrudes.
• the at least one clamping spring can be formed integrally from the material of the sheet metal part.
• the clamping spring is then exposed from the sheet metal part (e.g., cut or punched free) and bent out of the plane of the sheet metal part.
• An opening is then present in the plane of the sheet metal part. This opening is the window left by exposing the clamping spring from the sheet metal part, which is delimited by two side webs.
• the sheet metal part can support an electrically conductive busbar opposite the free end of the clamping spring.
• an electrically conductive busbar onto which the electrical conductor rests and is clamped by the spring force of the clamping spring, has the advantage that improved current transfer can be ensured by selecting a different, electrically conductive material, e.g., one with a higher copper content.
• the clamping point can also be formed between the clamping spring and a web of the sheet metal part opposite the clamping spring.
• the conductor terminal can have an insulating housing with a housing section into which the sheet metal part is accommodated.
• the housing section is then closed with a cover section, which can, for example, be latched onto the housing section.
• the cover section then has at least one conductor entry channel leading to a respective clamping spring.
• the channel side walls are formed on a cover part.
• Figure 1 shows a side sectional view of a first, single-row conductor terminal 1 for clamping electrical conductors.
• the conductor terminal 1 has an insulating housing 2, which consists of a Housing part 3 and a cover part 4 which closes the front of the housing part 3.
• the cover part 4 is pushed into the housing part 3 and locked into place.
• a contact element 5 which has a sheet metal part 6 and a busbar 7 is inserted into the housing part 3.
• the sheet metal part 6 has a clamping spring 8 which is exposed from the sheet metal part 6 (e.g. cut or punched free) and is bent out of the plane of the sheet metal part 6. By bending out the clamping spring 8, an opening delimited by side webs 9 remains in the sheet metal part 6.
• the freely movable end of the clamping spring 8 forms a clamping end which, for example, rests on the busbar 7 in the unoccupied rest state and together with the busbar 7 forms a clamping point for clamping an electrical conductor clamped between the clamping end 10 and the busbar 7.
• the sheet metal part is bent in a U-shape and has a support section 11 for the busbar 7 adjacent to the terminal end 10.
• clamping spring 8 is convexly curved in the root area 18, i.e., in the transition to the frame-like sheet metal part 6, in this clamping position of the busbar 7.
• the root area 18 with this curved section contributes significantly to the spring elasticity and to the application of the necessary spring force.
• the transverse web 20 has a surface 41 facing the conductor insertion channel 12.
• the surface 41 and the main extension direction H of the clamping spring 8 are approximately parallel to one another.
• the transverse orientation of the transverse web 20 transverse to its longitudinal extension direction and the main extension direction are essentially parallel to one another.
• the support section 11 viewed in the conductor insertion direction L, has a protruding nose 22 (material tab) behind the respective clamping end 10 of a clamping spring 8, on which the busbar 7 (not shown) can be supported.
• the busbar 7 can be held in a form-fitting manner in the space between these noses 22 and the side webs 9.
• Figure 6 shows a perspective view of the cover part 4 with the channel side walls 13 laterally delimiting a respective conductor entry channel 12. It is clear that two adjacent channel side walls 13 of adjacent conductor entry channels 12 are each connected to one another by a connecting web 23.
• the connecting web 23 then ends in front of narrower tabs 24, which are inserted into an opening in the sheet metal part 6 delimited by a side web 9.
• the webs 9 are then positioned between the tabs 24 connected to one another by the connecting web 23 of the cover part 4.
• This cover part 4 is made of a plastic material made of insulating material and has suitable locking elements for locking the cover part 4 with the housing part 3.
• the two outer channel side walls 13 have a T-shaped cross-section.
• the intermediate pairs of channel side walls 13 with the connecting webs 23 have an H-shaped or double-T-shaped cross-section.
• the cross-section under consideration lies in the main area behind the vanes 24.
• Figure 7 shows a perspective front view of the housing part 3 of the single-row conductor connection terminal 1.
• locking projections 25 which serve to lock the cover part 4.
• locking tabs 26 protrude from the front side of the housing part 3, which fit into the matching locking opening of the cover part 4.
• the contact element is inserted into the interior of the housing part 3, which consists of the Figure 5 shown sheet metal part 6 and possibly a busbar 7.
• the housing part 3 is then connected to the Figure 6 closed with the cover part 4 shown.
• FIG. 9 shows a longitudinal sectional view of housing part 3 in plan view. It is clear that housing part 3 has several adjacent conductor collection pockets in the rear area. Also visible is the test opening 27, which leads into the interior of housing part 3.
• Figure 10 shows a longitudinal sectional view of the cover part 4 in plan view. It is clear that the conductor entry channels 12 extend from the front to the end of the cover part 4.
• the conductor entry channels 12 initially have an expanded section and then taper into a tapered section.
• the conductor entry channels 12 are delimited by the channel side walls 13, which extend beyond the tapered section and terminate in narrower tabs 24.
• the material thickness of the channel side walls 13 widens from the tabs 14 towards the front.
• the diametrically opposite channel side walls 13 of adjacent conductor entry channels 12 are each integrally connected to one another by a connecting web 23.
• FIG 11 shows a front view of the cover part 4 with a view of the conductor entry channels 12. It is clear that in this cover part 4, for a three-pole conductor connection terminal, 3 conductor entry channels 12 are arranged next to one another and spaced from one another by the channel side walls 13 with the connecting web 23. Each conductor entry channel 12 leads to a clamping point formed by a clamping spring 8 and the common busbar 7 extending transversely to the direction of extension of the conductor entry channels 12, in order to clamp an electrical conductor 15 inserted into a respective conductor entry channel 12.
• Figure 12 shows a top view of the sheet metal part 6 of the previously described conductor connection terminals 1. It is clear that the clamping springs 8 are cut out of the sheet metal part 6, forming clamping tongues, while side webs 9 remain. These side webs 9 are connected to one another in the root area via a common cross web 28, so that the sheet metal part 6 has a frame-like structure.

Landscapes

• Connections Arranged To Contact A Plurality Of Conductors (AREA)
• Connection Or Junction Boxes (AREA)
• Multi-Conductor Connections (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)
• Cable Accessories (AREA)

Applications Claiming Priority (3)

Related Parent Applications (1)

Publications (2)

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ID=59702739

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• 2016
  • 2016-09-02 DE DE102016116510.7A patent/DE102016116510A1/de active Pending
• 2017
  • 2017-08-28 PL PL17757776.4T patent/PL3507866T3/pl unknown
  • 2017-08-28 WO PCT/EP2017/071541 patent/WO2018041774A2/de not_active Ceased
  • 2017-08-28 PL PL23168755.9T patent/PL4224635T3/pl unknown
  • 2017-08-28 JP JP2019511781A patent/JP7080876B2/ja active Active
  • 2017-08-28 RU RU2019103673A patent/RU2739591C2/ru active
  • 2017-08-28 KR KR1020197005536A patent/KR102514999B1/ko active Active
  • 2017-08-28 ES ES23168755T patent/ES3054538T3/es active Active
  • 2017-08-28 ES ES17757776T patent/ES2946240T3/es active Active
  • 2017-08-28 CN CN201780052504.XA patent/CN109690875B/zh active Active
  • 2017-08-28 EP EP23168755.9A patent/EP4224635B1/de active Active
  • 2017-08-28 EP EP17757776.4A patent/EP3507866B1/de active Active
• 2019
  • 2019-03-01 US US16/290,072 patent/US11024988B2/en active Active

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