DE202015102045U1 - Spring-loaded clamping element with pivoting lever - Google Patents

Abstract

Spring-loaded clamping element (1) for connecting an electrical conductor, a. with a spring housing (2) having an insertion opening (21) for introduction of the electrical conductor, and in which a busbar (33) and a clamping spring (4) are arranged, with which in the spring housing (2) inserted electrical conductor at a clamping point (40) between the clamping spring (4) and the busbar (33) can be clamped, b. wherein the spring force clamping element (1) further comprises a pivoting lever (5) which is pivotable about a pivot axis (6) for opening the clamping point (40) in a pivoting direction (61) and which has a contact geometry (52) which engages the clamping spring (52). 4) in opening the nip (40) in the pivoting direction (61) presses, c. wherein the pivoting lever (5) has an axial side (560) and an actuating side (570) and wherein the abutment geometry (52) is arranged between the axial side (560) and the actuating side (570), characterized in that d. the abutment geometry (52) extends below an upper edge of the insertion opening (21) into an imaginary periphery of the insertion opening (21).

Description

The present invention relates to a spring-loaded clamping element according to the preamble of claim 1.

Spring-loaded clamping elements have clamping springs which are provided and designed to clamp an electrical conductor inserted in the spring clip. The electrical conductors are, for example, solid wire conductors, stranded conductors or sleeves in which stranded conductors are jammed in order to protect the strands from damage. To ensure a good electrical conductivity, the wires of the conductors are usually made of a copper-containing metal or copper and soft in comparison to the spring steel used for spring clamps.

The US 8,262,422 B1 discloses a spring force clamping element in which an electrical conductor is clamped at a nip in a spring housing between a bus bar and a spring leg. The spring leg is pivotable about an axis. To release the electrical conductor, the spring leg has an extension, on the outer edge of a web is provided which engages in a groove of a pivotable about the same axis lever. As a result, the spring leg is pivotable with the lever against its restoring force and the electrical conductor can be removed from the spring housing.

However, the extension of the spring leg requires a relatively wide spring and thus a large depth. So that the bridge does not slip out of the groove, a very precise guidance of the lever is required. And by the introduction of force on the outer edge of the extension there is a risk that the spring bends when operating the lever to the outer edge and the actuating force acts unevenly on the spring.

In the DE 20 2013 101 582 U1 a spring force clamping element is described with pivot lever, in which a pivot lever has a system geometry over which the pivot lever acts on a clamping spring. This spring element has proven itself. However, it is desirable to further reduce the necessary to connect a conductor or to solve its operating forces.

The object of the invention is to provide a spring-loaded clamping element, the clamping point can be easily opened.

The object is achieved with a spring-loaded clamping element according to claim 1. Advantageous embodiments can be found in the dependent claims.

Accordingly, the invention provides that the investment geometry is designed so that it extends below the upper edge of the insertion into an imaginary periphery of the insertion into it. By the term "periphery" is meant the lateral surface through which the insertion opening is bounded below its upper edge (as below the surface A of the housing).

Since the lever arm extends into the imaginary periphery of the insertion opening, or since its investment geometry projects into the insertion opening, it becomes possible to make the effective lever arm of the pivot lever relatively long (ie the distance between the axis of the pivot lever and the contact area the investment geometry of the pivot lever on the clamping spring can be made relatively long), so that an opening of the clamping point with relatively small forces is possible. The invention also ensures a permanently good contact of the conductor to the investment geometry.

The projecting into the periphery investment geometry also advantageously leads the conductor or the conductor end in the direction of the clamping point when it is inclined relative to the conductor insertion obliquely in the direction of the clamping point or in the direction of the free end of the clamping leg of the clamping spring.

In a preferred embodiment of the invention, the insertion opening has a housing-fixed projection, which also protrudes into the peripheral surface below the insertion opening, wherein the projection preferably inclined relative to the conductor insertion obliquely in the direction of the clamping point or in the direction of the free end of the clamping leg of the clamping spring is. The projection advantageously further improves a type of insertion funnel, so that a conductor inserted into the insertion opening is securely pressed against the installation geometry so that a permanently secure contacting of the conductor to the installation geometry is ensured.

Preferably, the housing-fixed projection and the system geometry complement each other to an insertion bevel below the insertion opening.

The spring force clamping element is preferably used as a circuit board clamp.

The insertion region is preferably formed entirely or substantially cylindrical or funnel-shaped. Further preferably, the investment geometry is designed as a contact surface. However, other forms of insertion area and / or investment geometry are preferred.

It is preferred that the clamping spring has the clamping leg, which is provided pivotably about the pivot axis. Preferably, it also has a support leg, which is supported during pivoting of the clamping leg on the spring housing and / or on a clamping cage. Particularly preferably, the clamping spring is designed as a leaf spring. Most preferably, it is made of a spring steel.

In a preferred embodiment, the system geometry is at least partially flat on the clamping leg at least when opening the nip. In the area of the system geometry, the force acting on the clamping leg is thereby distributed evenly on this. In addition, it is preferred to provide a lever guide on the spring housing, along which the pivot lever is guided during opening. As a result, a rotation of the pivot lever during opening is prevented and the clamping spring or the clamping leg safely operated.

The pivot lever preferably has an axial side and an actuating side, wherein the system geometry is arranged between the axial side and the actuating side. It is advantageously designed approximately U-shaped, so that it can be integrated well and compactly into the construction.

Preferably, the pivot lever is mounted on its axial side. For this it is preferred that it has a steering knuckle. Also preferably, it has an actuating leg on its actuating side. Alternatively, it is semicircular. As a result, over the operating angle approximately rectilinear operation is possible.

In a particularly preferred embodiment, the system geometry is arranged between the axial side and the actuating side. As a result, an open end of the clamping leg when opening the nip is freely movable, whereby the removal of the electrical conductor is easy.

The pivot lever is preferably rotatably mounted on the steering knuckle about the pivot axis. Further preferably, an actuating surface is provided on the actuating limb. As a result, the lever travel is formed as large as possible and the force required to operate the clamping leg low. It is preferred that the actuating surface is designed for a tool-free operation and / or for an actuation with an actuating tool.

The clamping leg preferably has a first kink at the open end, and a second kink in the region of the investment geometry. Due to the second bend, the clamping limb between the first bend and the second bend extends almost transversely to a jammed electrical conductor or a conductor insertion direction. This allows a lower height. In addition, an angle between the clamping leg and the electrical conductor is formed blunt by the first bend and the jammed electrical conductor is not pulled out of the spring force clamping element and securely clamped. In addition, the open end of the clamping leg through the first bend in the Leiterereinführrichtung. As a result, the electrical conductor without damage in the spring housing can be inserted and clamped.

Furthermore, a guide contour is provided on the pivot lever, which is arranged in an assembled state of the spring force clamping element between the clamping leg and a support leg of the clamping spring. The guide contour is therefore arranged in the interior of the spring housing and does not increase the overall depth. In addition, a guide groove for the clamping spring is formed between the system geometry and the guide contour. In addition, the pivot lever is pivoted during pivoting back of the clamping leg with this automatically against the pivoting direction back. All these features are made compact and easy.

The invention will be explained in more detail below with reference to the drawings by means of exemplary embodiments, wherein further advantages of the invention will become apparent. It shows:

1 a perspective view of an array of juxtaposed spring-loaded clamping elements in isometric view, wherein the arrangement of the juxtaposed spring-loaded clamping elements is provided on one side with a cover plate;

2 a plan view of the arrangement of juxtaposed spring force clamping elements according to 1 ;

3 a perspective view of a spring-loaded clamping element in isometric view in partial exploded view;

4 : A perspective view of the spring force clamping element 3 in isometric representation in partial explosion representation;

5 : in a) a perspective view of a spring-loaded clamping element in isometric view with mounted pivoting lever, in b) a representation analogous to a) without the pivoting lever and in c) the pivoting lever from a);

6 a perspective view of a spring-loaded clamping element in a dimetric representation with mounted pivot lever;

7a : A perspective view of the clamping spring and the pivot lever of the back of the spring-loaded clamping element according to 3 to 6 without spring housing and clamping cage;

7b : A perspective view of the clamping spring and the pivot lever of the back of the spring-loaded clamping element according to 3 to 6 without spring housing and clamping cage;

In 1 and in 2 is in each case an arrangement or sequence of juxtaposed spring force clamping elements 1 represented, wherein the arrangement of the juxtaposed spring force clamping elements 1 on one side with a cover or an end plate 9 is provided. Such an arrangement of spring clamps 1 However, this is only an example. There are also other arrangements, for example on a circuit board conceivable, are applied to the tracks of circuits and / or power electronic components, by the illustrated spring force clamping elements 1 be supplied with voltage or from which by the spring force clamping elements 1 Voltage is dissipated. Alternatively, applications are conceivable in which individual spring force clamping elements 1 on a board or similar are attached.

The spring-loaded clamping element 1 is in 3 shown in perspective and has a spring housing 2 on with an interior 20 in which a clamping cage 3 is arranged. However, the invention also includes spring force clamping elements (not shown) that do not have a clamping cage 3 but only a separate busbar (not shown). The clamping cage 3 is through an insertion area 21 accessible, in the spring housing 2 is provided. The spring housing 2 is preferably made of an electrically insulating material, preferably a plastic, and may be formed as part of a parent housing, for example, a terminal block. The clamping cage 3 is preferably made of a highly electrically conductive metal, preferably made of a copper-containing metal or copper.

Next to the insertion area 21 is a holding contour 26 for a clamping spring 4 intended. The clamping spring 4 is designed here as a leaf spring. It has a clamping leg 41 and a support leg 42 on, by a roughly semicircular transverse leg 46 connected to each other. Preferably, the clamping spring 4 made of spring steel.

In the area of the transverse leg 46 is the clamping spring 4 around the retaining contour 26 guided. Approximately in the middle of the transverse leg 46 is a jetty 60 formed concentrically about a pivot axis 6 extends and forms a pivot pin. This is the clamping leg 41 around the pivot axis 6 pivotable. The following are the terms jetty 60 and pivot used synonymously.

The preferably U-shaped clamping cage 3 has a busbar 33 on, across a back wall 35 of the clamping cage 3 is arranged. Opposite the busbar 33 is transverse to the back wall 35 a side wall 32 formed at the a support bridge 321 is provided.

When pivoting the clamping leg 41 the clamping spring 4 in a pan direction 61 around the pivot axis 6 this is supported by the support leg 42 on the support bridge 321 from. This is the clamping leg 41 against a restoring force of the clamping spring 4 in the swing direction 61 pivoted.

At the clamping cage 3 is also a connecting dock 31 provided here at the four contacts or connection tiller 311 for connecting electrical conductors (not shown here, see eg the DE 20 2013 101 582 U1 . 2a) to 2d) ) are provided. The connection tiller shown here 311 are designed as solder pins. But other connections are possible, for example, a contact spring or a contact tulip or otherwise formed connections that allow soldering, jamming, plugging or the like. The arrangement of the connecting bar 31 , the connection tiller 311 or other connections can be selected depending on the existing installation space conditions (in particular in any orientation).

The clamping cage 3 is above a crossbar 22 of the spring housing 2 in the interior 20 the spring force clamping element 1 insertable. With inserted clamping cage 3 are the union tiller 311 led to the outside, leaving the interior 20 for the clamping spring 4 and one in the spring housing 2 inserted electrical conductor (not shown here) remains free. Besides, the connection tiller is 311 thus accessible from the outside.

The electrical conductor (not shown here) is mounted with spring force clamping element 1 in a conductor insertion direction 8th in this and between the clamping legs 41 and the busbar 33 insertable. In a mounting position it is at a nip 40 through the clamping leg 41 against the pivoting direction 61 against the busbar 33 pressed (see 2a - 2d in the DE 20 2013 101 582 U1 ). As an electrical conductor For example, a contact sleeve possible, in which usually a stranded conductor is inserted. The spring-loaded clamping element 1 but is also suitable for a stranded wire without sleeve and for a solid wire conductor.

To the electrical conductor from the spring-loaded clamping element 1 and solve this against the conductor insertion direction 8th to be able to remove, is a pivot lever 5 intended. With the swivel lever 5 is not just the electrical conductor from the spring-loaded clamping element 1 solvable. But the pivot lever 5 is to open the nip 40 intended. It therefore also makes it possible to open the nip 40 before an electrical conductor, in particular a fine-wire electrical conductor 7 in which spring-loaded clamping element 1 to be jammed. With opened nip 40 is the insertion of the electrical conductor in the nip 40 very easy.

The swivel lever 5 has an axis side 560 and an operation side 570 on that over a base leg 580 are connected ( 3 ). The base of the swing lever 5 is here about U-shaped. 5 and 6 illustrate that the U-shaped clamping cage 3 and the pivot lever 5 Advantageously lie opposite each other so that they form a kind of closed contour, which includes an inserted conductor, wherein the pivot lever 5 remains pivotable or is.

The swivel lever 5 indicates on its axle side 560 a steering knuckle 56 on. At the end 58 of the steering knuckle 56 he is at the pivot 60 arranged and about the pivot axis 6 rotatably mounted. There is a puncture for this 51 provided, concentrically about the pivot axis 6 extends and rotatably on the pivot pin 60 is arranged.

There are also differently shaped pivoting lever 5 For example, a semi-circular or a V-shaped pivot lever 5 , conceivable.

In addition, the pivot lever 5 on his side actuation 570 an actuating leg 57 on the steering knuckle 56 on the opposite end. At the open end 59 of the actuating leg 57 is an actuating surface 53 , here an operating handle 53 arranged. The following are the terms actuating surface 53 and operating handle used synonymously. On the operating handle 53 is the pivot lever 5 manually operated. In addition, at the open end 59 of the actuating leg 57 a recess 54 for an actuating tool (not shown), so that the pivot lever 5 There also with the operating tool, such as a screwdriver, can be actuated. Instead of an operating handle 53 But it is also a compact operating surface 53 preferred, which allows only one operation with an operating tool.

To use the swivel lever 5 the clamping leg 41 to be able to operate, so that the nip 40 is opened and the jammed electrical conductor in the spring force element 1 insertable or the spring force clamping element 1 is removable again, is between the steering knuckle 56 and the actuating leg 57 a plant geometry 52 intended. This is designed such that it during pivoting of the pivot lever 5 around the pivot axis 6 in the swing direction 61 the investment geometry 52 on the clamping leg 41 suppressed. This will also the clamping leg 41 around the donation axis 6 in the swing direction 61 pivoted.

The investment geometry 52 is flat and is at least when opening the nip 40 , so when pivoting the pivot lever 5 in the swing direction 61 , at least partially flat on the clamping leg 41 at. This distributes the force in the area of the system geometry 52 evenly on the clamping leg 41 , In addition, it breaks thereby when operating the pivot lever 5 Not. By a correspondingly dimensioned effective lever arm between the pivot axis 6 and investment geometry 52 of the pivot lever 5 is ensured that the actuating forces of the pivot lever 5 attached to the actuating surface 53 in the swivel lever 5 are introduced, are dimensioned so that an operator of the pivot lever 5 this can muster without special effort.

The investment geometry 52 of the pivot lever 5 on the clamping leg 41 the clamping spring 4 acts, is designed so that they are below the upper (housing) edge of the insertion 21 into a peripheral circumferential surface of this insertion opening 21 or extends into the insertion opening. Such is the lever arm of the pivot lever 5 on the clamping leg 41 pushes, relatively long, allowing to open the nip 40 only relatively small forces are required.

Preferably, the investment geometry is also 52 of the pivot lever 5 on the clamping leg 41 the clamping spring 4 acts obliquely to the conductor insertion direction 8th tilted. In interaction with a housing-fixed projection 10 , which is also oblique to the insertion direction 8th inclined in the insertion opening 21 protrudes, is advantageously formed a kind of cross-positive rest area for the conductor, which is designed such that the head safely for contact with the busbar 33 , in particular at the retaining edge 34 comes. This is in 5 and in 6 clearly visible. The inclination of the Forced guidance surface, formed from the investment geometry 52 and the lead, 11 for the conductor end is preferably more than 15 °.

Due to the restoring force of the clamping spring 4 becomes the clamping leg 41 against the pivoting direction 61 pivoted back automatically when the electrical conductor to the spring-loaded clamping element 1 is removed and no more actuating force on the pivot lever 5 acts. This is the clamping leg 41 at least partially on the investment geometry 52 and presses against the pivoting direction 61 on the investment geometry 52 so that the pivot lever 5 with the clamping spring 4 is pivoted back.

On the pivot lever 5 can also have a guide contour 55 (see also 5c as well as the DE 20 103 101 582 U1 respectively. 7a ), which in the assembled state of the spring force clamping element 1 essentially between the clamping leg 41 and the support leg 42 is arranged. Then there is between the investment geometry 52 and the possibly provided guide contour 55 (advantageous because compact and simple) a guide 561 formed in the clamping leg 41 is guided safely when pivoting.

So that the depth of the spring-loaded clamping element 1 through the pivot lever 5 is not unnecessarily enlarged, is on the spring cage 2 a lever guide 23 intended. When pivoting the pivot lever 5 along the lever guide 23 guided. The lever guide 23 prevents free pivoting of the pivot lever 5 with connected electrical conductor 7 ,

To the height of the spring-loaded clamping element 1 to limit and effect a good holding force on the inserted electrical conductor, the clamping leg 41 a first kink 43 and a second kink 45 on (see also 1 of the DE 20 2013 101 582 U1 ).

The first kink 43 is at an open end 44 of the clamping leg 41 intended. The second kink 45 is in the field of investment geometry 52 intended. By the second kink 45 extends the clamping leg 41 between the first kink 43 and the second kink 45 almost across the jammed electrical conductor or the Leiterereinführrichtung 8th , As a result, the height is low. Through the first crease 43 is an angle between the clamping leg 41 and the electrical conductor formed blunt and this in the spring force clamping element 1 securely jammed.

The direction of the construction depth 81 , the width of the building 82 and the height 83 are in the 2 to 6 shown.

To open the nip and release one in the spring force clamping element 1 jammed electrical conductor is an actuating force on the operating handle 53 or the recess 54 at the open end 59 of the actuating leg 57 of the pivot lever 5 required in the conductor insertion direction 8th acts.

FIG. A) shows a basic position G of the clamping spring on the basis of a representation which is not related to a specific housing 4 in which no electrical conductor in the spring housing 2 is introduced. In this basic position G, the clamping leg extends 41 approximately transversely to the conductor insertion direction 8th ,

Fig. B) shows analogously to 7a now a mounting position M of the clamping spring 4 in which an electrical conductor in the spring housing 2 is introduced and in this between the open end 44 of the clamping leg 41 and the busbar 33 is stuck. With the reference number 71 is here called the electrically conductive end of the sleeve.

LIST OF REFERENCE NUMBERS

1

Spring terminal element

2

casing

20

inner space

21

insertion

22

crosspiece

23

lever guide

26

Holding contour for the clamping spring

3

clamping cage

31

connecting web

311

Connection pin

32

Side wall

321

supporting web

33

conductor rail

34

retaining edge

35

rear wall

4

clamping spring

40

nip

41

clamping leg

42

support legs

43

First kink

44

Open end of the clamping leg

45

Second kink

5

pivoting lever

51

perforation

52

plant geometry

53

Operating surface, operating handle

54

recess

55

guide contour

551

guide

56

journal

560

axle side

561

guide

57

actuating leg

570

actuating side

580

base leg

58

Open end of the steering knuckle

59

Open end of the actuating leg

6

swivel axis

60

Bridge, pivot

61

pan direction

8th

Conductor insertion direction

81

depth

82

width

83

height

9

operating force

10

End cover

11

head Start

A

surface

G

basic position

M

mounting position

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

• US 8262422 B1 [0003]
• DE 202013101582 U1 [0005, 0038, 0040, 0053]
• DE 20103101582 U1 [0051]

Claims (9)

Spring-loaded clamping element ( 1 ) for connecting an electrical conductor, a. with a spring housing ( 2 ), which has an insertion opening ( 21 ) for insertion of the electrical conductor, and in which a busbar ( 33 ) and a clamping spring ( 4 ) are arranged, with which in the spring housing ( 2 ) introduced electrical conductors at a terminal point ( 40 ) between the clamping spring ( 4 ) and the busbar ( 33 ) is clamped, b. wherein the spring force clamping element ( 1 ) further comprises a pivoting lever ( 5 ), which is for opening the nip ( 40 ) in a pivoting direction ( 61 ) about a pivot axis ( 6 ) is pivotable, and the one investment geometry ( 52 ), which the clamping spring ( 4 ) when opening the nip ( 40 ) in the pivoting direction ( 61 ), c. the pivoting lever ( 5 ) an axis side ( 560 ) and an actuating side ( 570 ) and wherein the investment geometry ( 52 ) between the axis side ( 560 ) and the actuating side ( 570 ), characterized in that d. the investment geometry ( 52 ) below an upper edge of the Einführöffnung ( 21 ) to an imaginary periphery of the insertion opening ( 21 ) extends into it. Spring-loaded clamping element ( 1 ) according to claim 1, characterized in that the investment geometry ( 52 ) obliquely to a conductor insertion direction ( 8th ) in the ge thought periphery of the insertion ( 21 ) protrudes. Spring-loaded clamping element ( 1 ) according to claim 1 or 2, characterized in that the insertion opening ( 21 ) a housing-fixed projection ( 11 ), which - in turn, in particular obliquely to a conductor insertion direction ( 8th ) in the imaginary periphery of the insertion opening ( 21 ) protrudes. Spring-loaded clamping element ( 1 ) according to one of the preceding claims, characterized in that the investment geometry ( 52 ) at least partially on the clamping leg ( 41 ) and this presses when loosening in the pivoting direction. Spring-loaded clamping element ( 1 ) according to one of the preceding claims, characterized in that the housing-fixed projection ( 11 ) and complement the investment geometry to an insertion bevel below the insertion opening. Spring-loaded clamping element ( 1 ) according to one of the preceding claims, characterized in that the clamping spring ( 4 ) a clamping leg ( 41 ), which around the pivot axis ( 6 ) Is provided pivotably. Spring-loaded clamping element ( 1 ) according to one of the preceding claims, characterized in that the pivot lever ( 5 ) on its axial side ( 560 ) a steering knuckle ( 56 ), on which it is rotatable about the pivot axis ( 6 ) is stored. Spring-loaded clamping element ( 1 ) according to one of the preceding claims, characterized in that the pivot lever ( 5 ) on its actuating side ( 570 ) an actuating leg ( 57 ), on which an actuating surface ( 53 ) is provided. Spring-loaded clamping element ( 1 ) according to one of the preceding claims, characterized in that the actuating surface ( 53 ) is provided for both a tool-free operation as well as for an operation with an actuating tool.

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