DE202010018429U1 - Actuation device for an electrical connection terminal - Google Patents

Abstract

Actuating device for an electrical connection terminal (1), wherein - the electrical connection terminal (1) comprises a contact frame (4) arranged in an insulating housing (2) with a conductor clamp connection for an electrical conductor (5) and - the actuation device as a pusher (21) trained actuating element which is integrally connected to the insulating housing (2), and wherein - the conductor clamp connection on the contact frame (4) by at least one spring element (9) is formed, whose free end directed against the electrical conductor (5) and with a Clamping force acted upon clamping edge (10) forms and - the Leiterklemmanschluss by an action of the pusher (21) on the at least one spring element (9) can be opened by the pusher (21) applied a force against the clamping force on the spring element (9) is, characterized in that the pusher (21) consists of a pusher arm (23), w obei the pusher arm (23) - is connected with its one end to the insulating housing (2) and wherein - the pusher (23) along at least a portion of two mutually angularly arranged surfaces (18, 20) of the insulating housing (2) extends.

Description

The invention relates to an actuating device for an electrical terminal, wherein the electrical terminal comprises a arranged in an insulating housing contact frame with a Leitererklemmanschluss for an electrical conductor and the actuating means comprises a handle formed as actuating element, which is integrally connected to the insulating material, and wherein the Leiterklemmanschluss is formed on the contact frame by at least one spring element whose free end forms a against the electrical conductor directed and acted upon by a clamping force clamping edge and the Leiterklemmanschluss can be opened by an action of the pusher on the at least one spring element by the pusher a force against the Clamping force is applied to the spring element.

State of the art

The ES 2 159 247 A1 shows an electrical terminal with a housing for a pluggable electrical conductor with a spring terminal. On the housing, a lever-like pusher is integrally formed on the upper side thereof. At the pusher a pin is provided, which engages in a recess of the housing and in a recess of a contact insert and acts upon actuation of the pusher on the clamping spring to release the clamping contact. In order to achieve an effective lever arm, the pusher is overall very large and elaborately designed. A comparable embodiment is in the EP 1 182 750 A2 disclosed.

Object of the invention

The object of the invention is to provide an electrical terminal for the connection of an electrical conductor, which ensures a secure clamping of the electrical conductor and at the same time has a simple structure.

Disclosure of the invention

The object is achieved according to the invention by the features of claim 1. Thereafter, for an actuating device for an electrical terminal, wherein the electrical terminal comprises a arranged in an insulating housing contact frame with a Leiterklemmanschluss for an electrical conductor and the actuating device comprises a formed as a pusher actuator, which is integrally connected to the insulating material, and wherein the conductor clamp connection is formed on the contact frame by at least one spring element whose free end directed against the electrical conductor and acted upon by a clamping force clamping edge forms the Leitererklemmanschluss by an action of the pusher on the at least one spring element can be opened by a force against the clamping force is applied to the spring element by the pusher, provided that, according to the invention, the pusher from a push erarm consists, wherein the pusher arm is connected with its one end to the insulating housing and wherein the pusher extends along at least a portion of two at an angle to each other arranged surfaces of the insulating material.

The inventive design of the pusher, which is thus executed angularly, allows a relatively long effective pusher with a correspondingly long lever arm, which is particularly in confined space conditions or very small electrical terminals with small Isolierstoffgehäusen advantage. Thus, it is in the case of miniaturized connection terminals that the inventive design of the pusher makes it possible to provide an effective pusher for actuating a contact frame.

In a preferred embodiment, the two surfaces arranged at an angle to one another are arranged at least almost perpendicular to one another. Thus, the pusher arm is preferably formed from a first, the course of a rear housing adapted Pückerarmteil and a second, the course of a housing surface adapted Prankerarmteil. Furthermore, the pusher arm is thus preferably arranged in a recess of the insulating material housing.

In a particularly advantageous embodiment, the pusher arm on an actuating surface with a trough-shaped recess, so that in a simple way a piecemeal option for an operating tool is created so that the pusher can be operated safely.

Preferably, the pusher arm is designed elastically deformable, so that a simple movement or deflection of the pusher with minimal design effort can be guaranteed.

In a preferred embodiment, the spring element is designed as at least one leaf spring or a spring leg, so that in the preferred embodiment of the contact frame in the manner of a channel and the contact frame to form a Leiterklemmanschlusses on each side wall in each case a leaf spring in the manner of a punched out of a flat metal part tongue which is bent out of the plane of the flat metal part, in such a way the free end of the leaf spring forms a clamping edge directed against the electrical conductor. Thus, the electrical terminal is formed of only two components, the insulating housing with integrated pusher and a one-piece contact frame, so that a simple structure and easy installation can be ensured at low cost.

Preferably, in each case one of the leaf springs directed towards the outside of the electrical terminal run-on bevel is formed, which are issued to each other funnel-shaped. Thus, the pusher can be easily pressed between the leaf springs to open the terminal connection of the electrical conductor by pushing apart of the leaf springs. For this purpose, the pusher preferably has a corresponding wedge-shaped pusher surface which is formed at the end of the pusher arm which is remote from the end connected to the insulating housing.

In the assembled state of the electrical terminal in which the contact frame is inserted in the insulating housing, the pusher arm is under a bias, so that the pusher arm protrudes beyond the surface of the housing top. Characterized in that the trigger arm is subjected in the unactuated state of a bias voltage, the voltage with which the trigger arm is acted upon, be kept small. The value of the bias voltage is relatively small, since the deflection of the trigger arm in the unactuated state is also relatively small. The deflection of the pusher arm in the actuated position in the insulating material inside is also not much much larger than in the unactuated state, so that the voltages, which is subjected to the pusher, can be kept small overall. The low voltage levels within the pusher or pusher arm help to keep the pusher and thus also the insulating housing small.

In order to effectively avoid damage, in particular breakage, of the at least one spring element and / or the pusher, in a preferred embodiment an overload protection is provided for this purpose. Advantageously, the deflection of the spring element designed as a leaf spring spring can be limited by side walls and / or intermediate walls of the insulating material housing. Further advantageous is the limitation of the deflection of the trigger arm of the pusher by a contact of the pusher arm on at least one spring element formed as a leaf spring. These embodiments allow overload protection without significant adjustments to the electrical terminal and are therefore inexpensive.

Brief description of the drawings

The invention will be explained in more detail with reference to an embodiment shown in FIGS. Show it

1 : an inventive terminal in the assembly in perspective view,

2 : a terminal according to the invention arranged on your printed circuit board with inserted conductor without insulating housing,

3 a perspective view of the contact frame,

4 FIG. 2: a perspective sectional view of the connecting terminal according to the invention arranged on a printed circuit board with the electrical conductor inserted, FIG.

5a : A sectional view of the terminal according to the invention according to the section IV-IV 1 with unconfirmed pusher,

5b : A sectional view of the terminal according to the invention according to the section IV-IV 1 with pressed handle,

6a a first perspective view of the insulating housing,

6b : a second perspective view of the insulating material housing,

7 : A sectional view of the terminal according to the invention corresponding to the section VII-VII of Figure a.

Embodiment of the invention

The 1 shows an inventive electrical terminal 1 with an insulating material housing 2 in which a metallic contact frame 4 is included. The insulating material housing 2 has on a front side 19 at least one conductor insertion opening 3 for the insertion of an electrical conductor 5 ( 4 ). In the illustrated embodiment, the terminal is 1 two-pole, each with a conductor insertion opening 3 and a contact frame 4 executed per pole. The terminal can also have any other number of poles.

Are recognizable in the 1 furthermore connection areas 16 of the contact frame 4 which corresponding contact sections 28 , eg printed conductors, a printed circuit board 7 to contact ( 2 ). The lands 16 are with the contact sections 28 in particular connected via a solder joint (SMD solder joint), but also conceivable is a plug connection. In the 2 is the one on the circuit board 7 held contact frame 4 seen. In the presentation was dispensed with the insulating material, so that the connection of the electrical conductor 5 on the contact frame 4 is recognizable. The electrical conductor 5 is through an annular curved, at least almost closed running channel entrance 8th of the contact cream 4 introduced, with the stripped end 6 of the electrical conductor 5 between the as leaf springs 9 formed side walls of the channel-shaped contact frame 4 , recorded. The leaf springs 9 are bent out of a flat metal part and their free ends form a clamping edge 10 so that the two opposite clamping edges 10 the leaf springs 9 a terminal point for the electrical conductor 5 form. The area of which is connected to the conductor insertion opening 3 subsequent channel entrance 8th of the contact frame 4 up to that of the clamping edges 10 formed clamping point defines a conductor insertion area 30 ,

The structure of the contact frame 4 is in the 3 clearly visible, it can be seen that the formation of the clamping edge 10 at the free end of the leaf spring 9 an additional, against the electrical conductor 5 directed exhibition 12 is embossed or molded to improve the clamping action. Furthermore, the contact frame 4 a contact bottom 11 on, which is such out of the surface of a flat metal part or bent out, that this from the channel entrance 8th in the direction of the clamping point, that is essentially in the conductor insertion area 30 , rising in the direction of an inserted conductor 5 is executed inclined. To the contact ground 11 closes at the canal entrance at one end 8th a first contact area 16 at the other end a second contact area 16 at. In addition, in 3 at the annular channel entrance 8th molded front latching hook 14 recognizable, which for latching connection with the insulating material 2 in there next to the ladder entry opening 3 arranged corresponding front locking recesses 17 intervention. In the area between through the clamping edges 10 formed clamping point and facing away from the annular channel entrance rear contact area 16 are at the contact ground 11 Rear side at the contact bottom 11 arranged latch hooks 15 provided, which of the circuit board 7 or from the through the contact areas 16 formed level are preferably spaced and not shown in recesses of the insulating housing 2 intervention.

In the area of the free end of the leaf springs 9 , on each of which the clamping edge 10 is formed, has the leaf spring 9 each at their contact bottom 10 opposite longitudinal side of a run-on slope 12 on, which in each case to the outside of the terminal 1 is directed. The run-up slopes 12 a contact frame 4 thus together form an upward, from the contact bottom 10 remote funnel-shaped receptacle.

The 4 such as 5a and 5b each show a sectional view of the invention of a contact frame 4 and an insulating housing 2 assembled electrical terminal 1 , where in the 4 in addition a connected electrical conductor 5 is shown. In these figures, it can be seen that the housing inner wall 31 has an inclined portion within which the housing inner wall 31 against an inserted conductor 5 is executed inclined. This inclined area lies within the above-defined conductor lead-in area 30 or can also be about the entire lead introduction area 30 extend.

It is further evident in these illustrations that the lead introduction area 30 due to the design of the contact frame 4 with its leaf springs 9 and his contact floor 10 as well as the housing inner wall 31 of the insulating material housing 2 has an at least partially funnel-shaped configuration, wherein it is clear that the funnel-shaped conductor insertion area 30 from the contact frame 4 and the insulating housing 2 is composed. The funnel-shaped conductor insertion area 30 is circumferentially at least almost completely closed. Only between the leaf springs 9 and the contact floor 10 on the one hand and the leaf springs 9 and the housing inner wall 31 on the other hand, there are narrow gaps. The cross section of the conductor insertion area 30 In the exemplary embodiment, it is essentially rectangular or square, but may also have any other shape, in particular round or at least partially round or arcuate.

The funnel-shaped conductor insertion area 30 forms for a einzusteckenden electrical conductor 5 , in particular for its stripped end 6 , A guide, so that the stripped end can be targeted fed to the nip. The electrical connection terminal 1 is also for stranded electrical conductors 5 usable, in particular when passing through the clamping edges 10 formed clamping point by an actuator, which acts as a pusher 21 is formed, before plugging in the electrical conductor 5 is opened. The individual wires of the stranded conductor 5 can due to the circumferentially nearly closed conductor insertion area 30 do not dodge and be safe from the clamping edge 10 held clamped. That the Conductor insertion opening 3 facing the end of the funnel-shaped portion of the conductor insertion area 30 with the larger cross-section can also, if desired, as a stop for the isolated portion of the electrical conductor 5 serve.

In that the funnel-shaped conductor insertion area 30 composed of the insulating material 2 and the contact frame 4 or is formed by these two Baueilen, a simple and effective conductor guidance is achieved, in particular the contact frame 4 very simple, compact and material-saving can be performed.

In the 4 . 5a and 5b is also a pusher 21 as an actuator with a trigger arm 23 recognizable, which integral with the insulating material 2 is executed. The pusher 21 acts on run-up slopes 12 and presses this run-in slopes when actuated 12 together with the leaf spring 9 That is, when impressed with a force F in the direction of the insulating material 2 , apart. Thus, the clamping edges 10 the leaf spring 9 pressed apart and the clamping point for removing an electrical conductor 5 or for plugging in an electrical conductor 5 , in particular a stranded conductor 5 open.

The trigger arm 23 is according to the illustration below 6a and 6b in one piece in the area of the back of the housing 20 , Preferably in the lower, the housing top 18 remote half, on the insulating housing 2 formed. The trigger arm 23 follows the contour of the insulating material 2 , making a first on the back of the case 20 Tailed pusher arm part 24 approximately in the plane of the case back 20 or runs approximately parallel to it. The contour of the trigger arm 23 follows in the course of the contour of the transition from the back of the case 20 to the top of the housing 18 so that a second pusher arm part 25 , which with the first pusher arm part 24 is integrally connected approximately in the plane of the housing top 18 or runs approximately parallel to it. The case back 20 and the case top 18 are arranged at an angle to each other, preferably the case back 20 and the case top 18 arranged at least approximately at right angles to each other. The trigger arm 23 is thus essentially designed as an angle. On the second presser arm part 25 is at its end facing away from the first handle arm part an actuating surface 27 formed, which is formed trough-shaped in the present embodiment, but alternatively, any other arbitrary shape, such as slot or cross-slit shape, may assume. It is thus recognizable that the pusher 21 in a housing recess 22 which are located above the back of the housing 20 and the case top 18 extends, is arranged. The housing recess 22 is designed essentially as a breakthrough, so the pusher 21 on the inside of the insulating material 2 arranged contact frame 4 can act. The pusher 21 As an actuating element is thus with its angled design in the wall or surface of the insulating material 2 integrated and provides a part of the insulating material 2 itself.

When unassembled, the pusher arm is located 23 or the outer surface substantially in the plane of the surface contour of the insulating material 2 , both in the area of the housing top 18 as well as in the area of the back of the case 20 , In mounted with the in the insulating housing 2 used contact frame 4 and not actuated state is the pusher 21 but at least opposite the top of the case 18 something out, like this in 5a is recognizable. The run-up slopes 12 of the contact frame 4 lie on the pusher 21 or more precisely on the pusher surface 26 ( 7 ) and steer the pusher 21 outward, leaving the pusher arm 23 is under an elastic bias. In the 5b the actuated state is shown in which the pusher 21 with an actuating force F in the area of the trough-like actuating surface 27 is charged. It can be seen that the pusher arm 23 deformed substantially uniformly elastically under the operating force F, wherein the area of the pusher 21 with the actuating surfaces 26 between the leaf springs 9 dips. The trigger arm 23 has a substantially uniform thickness or thickness for uniform elastic deformation. During the actuation process, ie the depression of the pusher 21 becomes the pusher 21 from the over the top of the housing 18 protruding position shifted to a position in which the pusher arm 23 , in particular the second pusher arm part 25 , in the insulating housing 2 dips. This is the elastic bias of the trigger arm 23 lifted and the pusher arm 23 subjected to a reverse voltage, so that the trigger arm is anxious to move outward again to get into its initial position.

The 6a and 6b put the insulating material case 2 as an item, in particular the described embodiment of the pusher 21 and the connection of the trigger arm 23 to the insulating material 2 again clearly visible. Furthermore, it can be seen that the insulating material 2 on a housing bottom each recesses 32 in which the contact areas 16 of the contact frame 4 intervene so that these contact areas 16 over the back of the case 20 and the front of the case 19 with the conductor entry openings 3 can protrude (see also 1 ). At the same time it is achieved that the housing bottom of the composite electrical Connecting terminals forms a substantially flat surface without protruding components. The insulating material housing 2 can thus on the PCB 7 arranged state immediately up to the surface of the circuit board 7 rich or on the circuit board 7 rest.

The 7 clarifies again the operation of the pusher 21 on the contact frame 4 , The pusher surface 26 of the pusher 21 is formed substantially wedge-shaped and acts on the corresponding inclined bevels 12 of the contact frame 4 , When applying the pusher 21 with a force F over the actuating surface 27 slides the wedge-shaped pusher surface 26 over the run-up slopes 12 , dives between the leaf springs 9 and pushes them apart. Once the operating force F from the pusher 21 is taken away, press the leaf springs 9 due to their restoring force the pusher 21 over the run-up slopes 12 as well as the corresponding actuating surface 26 back to the starting position.

The illustrated angular configuration of the pusher 21 allows a relatively long effective pusher arm 23 with a correspondingly long lever arm, which is particularly advantageous in cramped space conditions or very small electrical terminals with small insulating housings. So it is in particular miniaturized terminals by the inventive design of the pusher 21 in the first place enables an effective pusher 21 for the operation of a contact frame 4 provided.

Because of the pusher arm 23 Subject to bias in the unactuated state, the voltage at which the trigger arm 23 is kept small. The value of the bias voltage is relatively small because of the deflection of the trigger arm 23 in the unactuated state is also relatively small. The deflection of the trigger arm 23 in the actuated position in the insulating material 2 It is also not much larger in this than in the unactuated state, so that the tension, which the pusher arm 23 is subjected, can also be kept relatively small. In contrast, the entire actuation would be on a tension-free handle arm 23 would be abandoned, which would be on the pusher arm 23 acting tension much larger, so that the handle arm 23 would have to be larger in size. It can therefore be seen that with the present arrangement of the pusher 21 inside the terminal 1 and its interaction with the contact frame 4 , the pusher 21 overall can be kept very small and thus is particularly suitable for very small-sized terminals.

With the illustrated embodiment of the electrical terminal can also overload protection for both the leaf springs 9 as well as for the pusher 21 will be realized. How out 7 it can be seen that are the leaf springs 9 arranged run-on slopes 12 at a sufficient deflection of the leaf springs 9 on the side walls 33 of the insulating material housing 2 and / or one or more between the poles of the terminal 1 arranged partitions 34 of the insulating material housing 2 nudge. The side walls 33 and / or partitions 34 thus limit a deflection of the leaf springs 9 and prevent them from being overloaded and thus unable to plastically deform or break.

At the same time, however, can also overload protection for the pusher 21 or the trigger arm can be realized. Due to the limited deflection of the leaf springs 9 can arise between two associated leaf springs only a limited gap. Provided the maximum width of the section of the pusher arm 23 which is between the leaf springs 9 immersed is greater than the gap between the maximum deflected leaf springs 9 , the pusher arm can 23 be deflected limited so that it can not be subjected to excessive stress and a break of the trigger arm 23 effectively avoided.

An overload protection for the pusher 21 or its trigger arm 23 can also be achieved in that on the between the leaf springs 9 immersed section of the trigger arm 23 a stop is provided, which at a maximum deflection of the trigger arm or at a maximum immersion depth on the leaf springs 9 or on the run-up slopes 12 rests, so that further deflection of the trigger arm is prevented and damage to the pusher 21 is avoided.

LIST OF REFERENCE NUMBERS

1

 terminal

2

 Insulated

3

 Conductor insertion opening

4

 contact frame

5

 electrical conductor

6

 stripped end of the electrical conductor

7

 circuit board

8th

 channel input

9

 leaf springs

10

 clamping edge

11

 Contact floor

12

 starting slope

13

 Exhibition of the free end of the leaf spring

14

 front latching hook

15

 rear locking hook

16

 contact areas

17

 front recess

18

 Housing top

19

 front

20

 Case back

21

 handle

22

 housing recess

23

 depressor

24

 first pusher arm part

25

 second pusher arm part

26

 pusher surface

27

 actuating surface

28

 Trace, contact section

30

 Conductor insertion area

31

 housing inner wall

32

 recess

33

 Side wall

34

 partition

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• ES 2159247 A1 [0002]
• EP 1182750 A2 [0002]

Claims (13)

Actuation device for an electrical terminal ( 1 ), wherein - the electrical terminal ( 1 ) in an insulating housing ( 2 ) arranged contact frame ( 4 ) with a conductor clamp connection for an electrical conductor ( 5 ) and - the actuating device as a pusher ( 21 ) formed actuating element which integrally with the insulating material ( 2 ), and wherein - the conductor clamp connection on the contact frame ( 4 ) by at least one spring element ( 9 ) is formed, the free end of a against the electrical conductor ( 5 ) and acted upon with a clamping force clamping edge ( 10 ) and - the conductor clamp connection by an action of the pusher ( 21 ) on the at least one spring element ( 9 ) can be opened by the pusher ( 21 ) a force against the clamping force on the spring element ( 9 ) is applied, characterized in that the pusher ( 21 ) from a pusher arm ( 23 ), wherein the pusher arm ( 23 ) - with its one end to the insulating housing ( 2 ) and wherein - the pusher arm ( 23 ) along at least one subsection of two surfaces arranged at an angle ( 18 . 20 ) of the insulating material housing ( 2 ). Actuating device according to claims 1, characterized in that the two surfaces arranged at an angle ( 18 . 20 ) are arranged at least almost perpendicular to each other. Actuating device according to claim 1 or 2, characterized in that the pusher arm ( 23 ) from a first ( 24 ), the course of a case back ( 20 ) adapted pusher arm part and a second ( 25 ), the course of a housing surface ( 18 ) adapted pusher arm is formed. Actuating device according to one of claims 1 to 3, characterized in that the the pusher arm ( 23 ) within a recess ( 22 ) of the insulating material housing ( 2 ) is arranged. Actuating device according to one of claims 1 to 4, characterized in that the pusher arm ( 23 ) an actuating surface ( 27 ) having a trough-shaped recess. Actuating device according to one of claims 1 to 5, characterized in that the pusher arm ( 23 ) is elastically deformable. Actuating device according to one of claims 1 to 6, characterized in that the spring element as at least one leaf spring ( 9 ) or a spring leg is formed. Actuating device according to one of claims 1 to 7, characterized in that the contact frame ( 4 ) in the manner of a channel and wherein the contact frame ( 4 ) to form a Leiterklemmanschlusses on each side wall in each case a leaf spring ( 9 ) in the manner of a tongue punched out of a flat metal part, which is bent out of the plane of the flat metal part, such that the free end of the leaf spring ( 9 ) one against the electrical conductor ( 5 ) directed clamping edge ( 10 ). Actuating device according to claim 8, characterized in that on the leaf springs ( 9 ) one each to the outside of the electrical terminal ( 1 ) directed run-up slope ( 12 ) is formed, which are funnel-shaped issued to each other. Actuating device according to one of claims 1 to 9, characterized in that the pusher arm ( 23 ) has an actuating portion which on the on the insulating housing ( 2 ) tailed away and which has a substantially wedge-shaped pusher surface ( 26 ), wherein the wedge-shaped pusher surface ( 26 ) over the funnel-shaped to each other issued run-on slopes ( 12 ) between the leaf springs ( 9 ) can be pressed to the terminal connection of the electrical conductor ( 5 ) by pushing apart the leaf springs ( 9 ) to open. Actuating device according to one of claims 1 to 10, characterized in that in the assembled state of Isolierstoffgehäuse and contact frame ( 2 ) the pusher arm ( 23 ) is under a bias. Actuating device according to one of claims 1 to 11, characterized in that for the at least one spring element ( 9 ) and / or the pusher ( 21 ) An overload protection is provided. Actuating device according to claim 12, characterized in that the deflection of the leaf spring ( 9 ) formed spring element by side walls ( 33 ) and / or partitions of the insulating housing ( 2 ) is limited. Actuating device according to claim 12 or 13, characterized in that the deflection of the trigger arm ( 23 ) by an attachment of the trigger arm ( 23 ) at least one as a leaf spring ( 9 ) trained spring element is limited.

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