DE202012104408U1 - Spring terminal with an actuating means - Google Patents

Abstract

Spring-loaded terminal (10) for connecting an electrical conductor (4), a. with a spring cage (1) which delimits a connection space (16) in which a clamping spring (2) for clamping the electrical conductor (4) is arranged in the area of a clamping point which has a clamping spring arm (22) with which the conductor ( 4) can be pressed against the conductive spring cage or a busbar in the area of the clamping point, b. wherein the spring clamp (10) comprises an actuating means (3) for actuating the clamping spring which opens the connection space (16) by pressing an actuating head (33) in an actuating direction (7), characterized in that c. the actuating means (3) has an elongated, preferably rectangular and preferably circumferentially closed passage (34) through which the conductor (4) can be inserted into the connection space (16) and its terminal point, d. the actuating means (3) has a contact surface (31) with which it preferably lies flat when the clamping spring (2) is actuated and which is oriented at an angle α to the conductor insertion direction (61), and e. the bushing has a surface (35) oriented at an angle β to the conductor insertion direction (61), over which conductors (4) of a minimum cross-section press on the clamping spring arm (22) when inserted into the clamping point, whereby the clamping point opens so that the Head (4) can be guided into the terminal point.

Description

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

There are a variety of different spring terminals known, which are provided for connecting an electrical conductor to an electrical component, for example to an electrical circuit board. The decisive factor for such spring-loaded terminals is that they allow easy and quick fastening of an electrical conductor in the spring-loaded terminal and optionally also an easy and rapid release of the electrical conductor from the spring-loaded terminal. The spring-loaded terminals must ensure safe contact of the electrical conductor with the electrical component. In addition, there is a tendency that electrical components are built smaller and smaller, so that the space available for the spring-loaded terminals space is getting smaller. The spring-loaded terminals should therefore occupy as little space as possible.

The publication DE 10 2010 025 930 A1 discloses a spring terminal with an opening device with which a clamping leg of a clamping spring is pivotable so that a jammed in the spring terminal electrical conductor this is removable. The opening device has legs, which are guided laterally of the clamping leg. To remove the electrical conductor therefore lateral widening of the clamping leg are required to which the opening device engages when opening the clamping spring. The depth of this spring clamp is therefore determined by the spacers and wider than the clamping leg.

The prior art is also the WO 2010/049197 A1 called.

The object of the invention is to provide a spring clamp, which allows easy and safe as well as quick attachment and detachment of an electrical conductor in the spring terminal, ensures a secure contact, and requires the smallest possible depth.

The object is achieved by a spring terminal for connecting an electrical conductor, with a spring cage defining a terminal space in which a clamping spring is arranged for clamping the electrical conductor in the region of a terminal point, which has a Klemmfederarm, with which the conductor in the region Clamping point against the conductive spring cage or a busbar can be pressed, wherein the spring terminal comprises an actuating means for actuating the clamping spring, which opens the terminal compartment in an operating direction by pressing an actuating head, wherein the actuating means further comprises an elongated, preferably rectangular and preferably circumferentially closed passage through the conductor in the connection space and the terminal point is insertable, wherein also the actuating means has a contact surface, with which it preferably abuts flat when pressing the clamping spring and which angled i n is oriented at an angle α to the conductor insertion direction, and wherein the passage has an angularly oriented at an angle β to Leitereinführrichtung surface over which conductors of a minimum cross-section during insertion into the nip on the Klemmfederarm press, thereby opening the nip, so that the conductor can be guided up to the clamping point.

Since the actuating means preferably rests flat, in particular full surface, on the clamping spring, the depth of this spring terminal is very narrow buildable and very compact, so that in the direction of the pivot axis in a relatively dense space many of the connection devices can be accommodated, for example in a plug or a terminal , especially in a terminal block.

In addition, there is always a safe opening. Opening can be done by the conductor itself or by pressing on the actuator. When the conductor itself is used to open the nip, it is advantageous that it acts on the clamping spring arm over the surface of the bushing and moves it. This makes it possible to put the contact surface very close to the free end of the clamping leg, so that the lever arm on Klemmfederarm when pressing to release the nip when removing the conductor can be quite long. The contact surface can thus extend to very close to the nip.

The Klemmfederarm is in this case of the basic state in which the electrical conductor is inserted into the spring-loaded terminal in a Einsschieberichtung, in the clamping state in which the electrical conductor is clamped in the spring terminal clamp, pivotable in a pivoting direction. The pivoting of the clamping spring arm in the pivoting direction is preferably limited by a stop which is provided on the spring cage.

Particularly preferably, the actuating means comprises an actuating arm with a first arm part which is at a first angle to the clamping spring arm of the clamping spring. Most preferably, the first angle is about 75 ° -90 °, preferably 85 ° -90 °, so that the clamping spring arm is arranged approximately orthogonal to m first arm part of the actuating means, which allows an advantageous introduction of force.

Further preferably, the actuating arm has a second arm part, which is arranged at a second angle to the first arm part. As a result, the spring clamp is buildable so that the contact surface acts upon actuation to about half the length of the Klemmfederarms.

These arrangements also make it particularly easy to set a suitable angle between the actuating direction of the actuating means and the insertion direction of the electrical conductor in the spring-loaded terminal. In a preferred embodiment, the actuation direction is arranged in a right-handed or at least approximately right angle to the insertion direction.

For actuating the actuating means, in particular for removing a conductor, the actuating arm has an actuating head. Preferably, an engagement for an actuating means, in particular a screwdriver is provided on the actuating head. The adjustment of the first and / or second angle allows adjustment of the operating height of the actuating means relative to the height of the spring-loaded terminal.

The arrangement of the second arm portion at a second angle to the first arm portion or causes the implementation is greater selectable compared to an actuating means having only the first approximately orthogonal to the clamping spring arm arm portion. As a result, electrical conductors with a larger conductor cross section can be arranged in the spring clip.

Further preferably, the spring-loaded terminal has a busbar with a contact tongue, which is arranged on a side wall of the spring cage. The busbar is preferably made of a highly conductive material. Particularly preferably, an inserted into the terminal compartment conductor is clamped in the clamping state between the clamping spring and the contact tongue, so that a secure contact between the electrical conductor and the busbar is made. For this purpose, the contact tongues preferably extends into the bushing.

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

1 in (a) and (b) different perspective views of the spring cage with the clamping spring and the actuating means, and in (c) is a schematic side view of the clamping spring and the actuating means;

2 various perspective views of the spring cage with the clamping spring, the busbar and the actuating means, wherein the clamping spring in (a) - (c) in the ground state, in the clamping state and in the release state is shown;

3 in (a) - (c) is a perspective view of the spring clamp in the ground state, in the clamping state and in the release state of the clamping spring.

In 1 is the preferred spring cage 1 shown. It is approximately U-shaped in cross section and has a rear wall 11 and across the back wall 11 two sidewalls each 12 . 13 on, over the back wall 11 connected to each other. He also points across to the side walls 12 . 13 an advantageous, optional sub-wall 14 on. The back wall 11 , Side walls 12 . 13 and subwall 14 limit a connection space 16 of the spring cage 1 ,

On a side wall 13 of the spring cage 1 is a clamping spring 2 established. The clamping spring 2 is about V-shaped. It is in the region of a bend about a pivot axis 20 commanded and has a mounting arm 21 on, with which they are on the side wall 13 is arranged, and a Klemmfederarm 22 in the connection room 16 protrudes.

The clamp spring arm 21 is about the pivot axis 20 in and against a pivoting direction 63 pivotable. This is the Klemmfederarm 22 when pivoting in the swivel direction 63 adjusted against its restoring force while it is pivoting against the pivoting direction 63 is reset.

Shown is also an actuating means 3 that has a contact surface 31 having, when pressed on the entire surface of the clamping spring arm 22 is applied. The actuating means 3 has an actuating arm 32 on, the one operating head 33 at which the actuating means 3 is operable, with the contact surface 31 combines. The actuating arm 32 has a first arm part 321 up, at a first angle 91 to the clamp spring arm 22 is arranged. In a preferred embodiment, the first arm part 321 and the clamp spring arm 22 arranged approximately orthogonal to each other.

In addition, the actuating arm has 32 a second arm part 322 on that at a second angle 92 to the first arm part 321 is arranged.

In this second arm part 322 is an implementation 34 provided by an electrical conductor 4 in an insertion direction / insertion direction 61 in the connection room 16 of the spring cage 1 is insertable.

In the connection room 16 he is in the area of a terminal point against a busbar 5 or pressed directly against the spring cage, which consists in the latter case of a highly conductive material, in particular metal.

At the operating head 33 is here or preferably provided an intervention, the actuation of the actuating means 3 with an actuating tool (not shown), such as a screwdriver simplified.

The electrical conductor shown 4 has a vein 41 who is trained as a full-time manager. He also has a sheath 42 on.

The invention is also suitable for electrical conductors 4 , which are designed as a stranded conductor. If fuller conductors are used or contacted, the terminal point can be opened with them.

In 1 (c) is the arrangement of the clamping spring 2 and the actuating means 3 shown schematically.

It is visible that the approximately vertical arrangement of the first arm part 321 to the clamp spring arm 22 as well as the second angle 92 between the first arm part 321 and second arm part 322 the adjustment of an angle (not shown) between the direction of actuation 7 of the actuating means 3 and the insertion direction 61 of the electrical conductor 4 in the spring-loaded terminal 1 allows.

The angle between the insertion direction 61 and the arm part 321 here is smaller than a right angle. Advantageously, this angle is between 50 ° and 60 °, here at 55 °.

Furthermore, the second angle allows 92 between the first and second arm parts 321 . 322 in that the spring clamp 1 so buildable is that the contact surface 31 when pressed to about half the length L of the Klemmfederarms 22 attacks.

The 2 shows the electrical conductor 4 when inserted into the spring-loaded terminal 10 , in the spring-loaded terminal 10 bound electrical conductor 4 , as well as the electrical conductor 4 when removing from the spring clamp 10 ,

Opposite the 1 is in the 2 on the spring cage 1 also a busbar 5 arranged.

The busbar 5 is formed in one piece and has a base 51 and a contact tongue 52 on, as well as here two contact feet 53 , The base area 51 extends approximately parallel to the lower wall 14 of the spring cage 1 while the contact tongue 52 across the ground 51 is provided, and in the terminal room 16 at the clamping spring 2 opposite side wall 12 of the clamping cage 1 is arranged.

2 (a) shows the insertion of the electrical conductor 4 in the spring-loaded terminal 10 , The clamping spring 2 is initially in the ground state G. The insertion takes place in a direction of insertion 61 ,

This is the electrical conductor 4 through the implementation 34 of the actuating means 3 guided. The implementation 34 lies in the insertion direction before or above the Klemmfederarms 2 ,

If the conductor diameter is corresponding or very small, it can through the implementation 34 passed through and directly on the Klemmfederarm 22 acting, wherein he presses down the Klemmfederarm, whereby the nip opens.

This is the Klemmfederarm 22 against its restoring force in the pivoting direction 63 He pivots until he is between an open end 221 (S. 1 (b) ) of the clamping spring arm 22 and the contact tongue 52 is arranged. Due to the restoring force of the clamping spring 2 becomes the electrical conductor 4 in this clamping state K against the pivoting direction 63 between the clamp spring arm 22 and the contact tongue 52 jammed. He lies at the contact tongue 52 and contacts them electrically.

Is the diameter of the conductor 34 on the other hand, so big that he does not jump right through 34 is feasible, meets the leader 4 initially when inserting on an angle at an angle β to the conductor insertion 61 aligned area 35 the implementation 34 on, over which the ladder 4 then "indirectly" on the clamp spring arm 22 pushes, whereby this is pressed down, whereby the nip opens, so that the conductor 4 can be guided further into the clamping point. In this case, the actuating means 3 from the ladder 4 with moves. This functionality is particularly advantageous. The implementation 34 is preferably circumferentially closed so that it is particularly stable. This is not mandatory. The jetty 30 limits it to that of the actuator head 33 remote from the lying side of the actuating means 3 ,

2 (a) shows the in the spring clamp 10 bound electrical conductor 4 , The clamping spring 2 is in the clamping state K. The angle β is preferably - but not necessarily - between 15 and 50 °. Here it is 32 °.

The same applies to the angle α between the contact surface 31 of the bridge to the clamping spring arm 22 towards and the insertion direction 61 , Preferably, this angle is the inclination angle of the clamping spring arm 22 to the insertion direction of the conductor ( 61 ) correspond. It can therefore also be advantageous: α = β. Then the corresponding jetty 30 at the execution 34 with the two surfaces 31 and 35 a flat bar.

Also for removing the electrical conductor 4 from the spring-loaded terminal 10 is the actuating means 3 intended. 2 (c) shows the removal on actuation of the actuating means 3 , The clamping spring 2 is against their restoring force in the swing direction 63 pivoted and is therefore in the release state Ö. Visible is that pivoting through a stop 15 of the spring cage 1 in the connection room 16 protrudes, is limited.

In the release state Ö is the open end 221 of the clamping spring arm 22 no longer on the electrical conductor 4 so that this is the spring clamp 10 in a withdrawal direction 62 against the insertion direction 61 is removable.

3 shows an interior 81 a housing 8th the spring-loaded terminal 1 , In the interior 81 are the spring cage 1 , the clamping spring 2 , the power rail 5 and the actuating means 3 of the 2 arranged.

For insertion of the electrical conductor 4 is an insertion opening 82 intended. In addition, the housing has 8th a guide channel 83 for the actuating means 3 on. Furthermore, at the insertion opening 82 a tongue 84 arranged, which is a displacement of the actuating means 3 limited, so the implementation 34 in the ground state G of the clamping spring 2 below the insertion opening 82 is arranged. This will be the electrical conductor 4 when inserted into the spring-loaded terminal 10 automatically through the implementation 34 guided.

The clamping spring 2 everywhere has about the same width B (s. 2 (a) ) on. This width B is therefore for the overall depth T of the spring clamp 10 prevail.

As can further be seen, the bus bar 5 at its free end, the contact tongue 52 on that on a side wall of the spring cage 1 arranged, with the contact tongue 52 and / or the side wall of the spring cage in the implementation 34 protrude into it. Preferably, the width of the contact tongue 52 and the side wall of the spring cage 1 , respectively in the area that is in the conduct 34 into or through it, smaller than each below the implementation 34 lies. The implementation 34 can be so good at the contact tongue 52 slide and the actuator or means 3 lead in this area. Preferably, the implementation has two parallel aligned webs 36 . 37 on which by the jetty 30 on the one hand and by the rest of the actuating arm 32 on the other hand connected to each other.

As can be seen, the clamping spring protrudes 2 preferably with its bending over the upper edge of the clamping cage or spring cage 1 in addition, so that it can be made relatively short in the insertion direction.

It is also visible that an operating height H of the actuating head 33 by adjusting the first and / or second angle 91 . 92 is customizable.

LIST OF REFERENCE NUMBERS

1

spring cage

11

rear wall

12, 13

side walls

14

under wall

15

attack

16

connection space

2

clamping spring

20

swivel axis

21

Befestigungsfederarm

22

Klemmfederarm

G

Basic state of the clamping spring

K

Clamping condition of the clamping spring

Ö

Release state of the clamping spring

3

actuating means

30

web

31

contact surface

32

actuating arm

321

First arm part

322

Second arm part

33

actuating head

331

intervention

34

penetration

35

area

36, 37

web

4

Electrical conductor

41

Vein

42

jacket

5

conductor rail

51

Floor space

52

contact tongue

53

contact feet

61

insertion

62

removal direction

64

pan direction

7

operating direction

8th

casing

81

inner space

82

insertion

83

guide channel

84

tongue

91

First angle

92

Second angle

93

Third angle

10

Spring terminal

T

Construction depth of the spring-loaded terminal

H

operating height

L

Length of the clamping spring

α

angle

β

angle

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

• DE 102010025930 A1 [0003]
• WO 2010/049197 A1 [0004]

Claims (9)

Spring terminal ( 10 ) for connecting an electrical conductor ( 4 ), a. with a spring cage ( 1 ), which has a connection space ( 16 ), in which a clamping spring ( 2 ) for jamming the electrical conductor ( 4 ) is arranged in the region of a clamping point which a Klemmfederarm ( 22 ), with which the conductor ( 4 ) in the region of the clamping point against the conductive spring cage or a bus bar is pressed, b. the spring clip ( 10 ) an actuating means ( 3 ) for actuating the clamping spring, which by pressing an actuating head ( 33 ) in an actuating direction ( 7 ) the connection space ( 16 ), characterized in that c. the actuating means ( 3 ) an elongated, preferably rectangular and preferably circumferentially closed implementation ( 34 ) through which the conductor ( 4 ) in the connection space ( 16 ) and whose clamping point is insertable, d. the actuating means ( 3 ) a contact surface ( 31 ), with which it when pressing the clamping spring ( 2 ) is preferably flat against this and which angled at an angle α to the conductor insertion direction ( 61 ), and e. the passage at an angle β to the conductor insertion direction ( 61 ) aligned surface ( 35 ) over which conductors ( 4 ) of a minimum cross-section during insertion into the clamping point on the clamping spring arm ( 22 ), whereby the nip opens so that the conductor ( 4 ) can be guided in the nip. Spring terminal ( 10 ) according to claim 1, characterized in that the actuating means ( 3 ) an actuating arm ( 32 ) with a first arm part ( 321 ), which at a first angle ( 91 ) to the clamping spring ( 2 ) is arranged. Spring terminal ( 10 ) according to one of the preceding claims, characterized in that the first angle ( 91 ) is about 75 ° -90 °, preferably 85 ° -90 °. Spring terminal ( 10 ) according to one of the preceding claims, characterized in that the actuating arm ( 3 ) a second arm part ( 322 ), which at a second angle ( 92 ) to the first arm part ( 321 ) is arranged. Spring terminal ( 10 ) according to one of the preceding claims, characterized in that in the second arm part ( 32 ) the implementation ( 34 ) is provided, through which the electrical conductor ( 4 ) in the connection space ( 16 ) is insertable. Spring terminal ( 10 ) according to one of the preceding claims, characterized in that the clamping spring arm ( 22 ) by actuating the actuating means ( 3 ) in an actuating direction ( 7 ) is pivotable from the clamping state (K) in a release state (Ö), in which the electrical conductor ( 4 ) of the spring-loaded terminal ( 10 ) is removable. Spring terminal ( 10 ) according to one of the preceding claims, characterized in that the actuating direction ( 7 ) at an angle, preferably at a right angle to the insertion direction ( 61 ) is arranged. Spring terminal ( 10 ) according to one of the preceding claims, characterized in that the spring-loaded terminal has the busbar with a contact tongue, which is arranged on a side wall of the spring cage and that the contact tongue and / or the side wall of the spring cage in the implementation ( 34 protrude). Spring terminal ( 10 ) according to one of the preceding claims, characterized in that it has a housing ( 8th ), wherein in an interior space ( 81 ) of the housing of the spring cage 1 , the clamping spring ( 2 ), the busbar ( 5 ) and the actuating means ( 3 ) except for the actuating head ( 33 ) are arranged so that the actuating means is accessible from the outside and that the housing ( 8th ) a guide channel ( 83 ) for the actuating means ( 3 ) having.

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