DE102004020958B3 - Connection clip for cables, used e.g. in terminal blocks or on circuit boards, includes spring connections in differing configurations at either end of conductor strip - Google Patents

Abstract

The second spring clip connector (6) is integral with the conductor strip (2) at one end. At the other end a sidewall is bent up at right angles to the strip, forming a contact limb (20). Another sidewall is bent up opposite the first. A section of this is parted from the strip, forming a leaf spring (22) at an acute angle (alpha ) to an insertion direction. One edge of the leaf spring is biased into contact with the opposite wall (20). A connection box employing the clip, with bypass diodes between adjacent contacts, is also described.

Description

The The invention relates to a terminal for several Ladder, with a busbar and several spring clamped connections to the Contacting the conductors to the busbar, wherein at least a first Spring clamp connection to Recording a round conductor by the arrangement of a cage tension spring a first end of the busbar is formed and at least a second spring clamp connection to Recording a ribbon conductor by the arrangement of a pawl spring is formed on the second end of the busbar. Farther the invention relates to a connection box for round and flat conductor, especially for Photovoltaic modules provided with several such terminals is.

terminals for many Heads are known in a variety of configurations, eg. for use in terminal blocks or PCB terminals.

From the DE 203 11 184 U1 a junction box for connection to a solar panel is known, comprising a housing in which an opening for supplying electrical lines is provided with contact elements for connection to the electrical lines. The electrical conductors to be connected are round conductors, and the connecting conductors of the solar panel to be contacted are ribbon conductors. The junction box contains several juxtaposed terminals. Each terminal has a plurality of Federklemmanschlüsse, wherein at least a first Federklemmanschluss with Käfigzugfederklemme for receiving a round conductor and at least a second Federklemmanschluß with locking hook clamp for receiving a ribbon conductor is formed.

From the EP 1 102 354 A2 is a device for making a contact with ribbon conductors, in particular a solar module, known.

The DE 100 21 027 A1 discloses an electrical terminal having an in-house bus bar and at least one clamp terminal for connecting an electrical conductor.

From the DE 196 39 785 C2 a bus bar for terminal blocks with a conductor terminal and a female connector for connecting another conductor is known.

The DE 44 13 151 A1 shows a terminal for an electrical installation switch, wherein a clamp spring between the legs of an approximately U-shaped Umgehäuses is used.

The The object of the invention is a terminal for many Provide conductor, in which the spring clamp connection for the ribbon conductor in the simplest way offers a good contact and with a Removal safety is provided.

The The object of the invention further consists in a terminal to provide that has the lowest possible height to them in one possible flat connection housing or a connection box to be able to accommodate.

The The aforementioned object is achieved by a terminal solved according to claim 1.

Of the Spring leg can at an angle of between 20 ° and 80 °, in particular 45 °, too be angled the insertion direction.

It can be provided that the Spring legs in several juxtaposed individual legs is divided. It can be provided that the contact leg facing End portions of the individual legs are connected to each other.

Prefers the invention provides that the busbar an abutment portion as an opening aid for the Has spring terminal.

Prefers the invention further provides that between the first and the second spring clamp connection at least a third spring clamp connection arranged is. When using the terminal in a junction box for photovoltaic modules are preferably provided two third Federklemmanschlüsse, each have a spring leg acting against the busbar. Of the Spring leg of each third Federklemmanschlusses is preferred formed by punching out of the busbar and has an angled portion for the centered recording of a round conductor.

Everyone third spring clamp connection can a guide opening for one Have to be received round conductor in alignment with the spring leg.

In Reference to the connection box for round and flat cable conductor, the object of the invention is the, port work to simplify and shorten the assembly time. This object is achieved by a connection box solved according to claim 10.

Prefers is provided that the terminals are received in a lower part, which with an attached, tight-fitting Lid is closed.

The Lower part may have a bottom wall, in the receiving recesses and / or retaining webs for positive locking Mounting of the terminals arranged in parallel arrangement next to each other.

It can be provided that the Lower part adjacent to the first Federklemmanschlüssen one Protected area above that acts as protection for an underlying glass pane, to which the junction box is fixed is used when mounting a cable gland with a wrench becomes.

The Invention further provides that a bottom opening for Performing Ribbon cables is present.

at Use as a connection box for photovoltaic modules can be provided that adjacent terminals each connected by a bypass diode to uneven current delivery adjacent modules e.g. due to uneven irradiation intensities damage to the Prevent modules (hot spot avoidance).

Farther can be provided that the terminals are arranged in a plane and within the plane such that the contact legs lie in the same plane, so that in the connected state all connected ribbon conductors in a common plane lie and a smallest possible height is achieved in the direction perpendicular to the common plane.

So far terminals be used, in which the spring clamp and the spring leg the second spring clamp connection clamped ladder in each other Apply vertical directions with spring force, so that the spring terminal with its width direction perpendicular to and as a whole in the or arranged parallel to the plane of the male ribbon conductor is, with a small height of the terminal is achieved, it is preferably provided that the terminals lying in the connection box are arranged, whereby it is achieved that in the connected state all connected ribbon conductors in a common plane lie, so that a smallest possible height is achieved in the direction perpendicular to the common plane, since the spring clips lying, i. with their larger dimension in the common Plane are arranged horizontally and only with their width dimension to the height the connection box contribute.

Further Advantages of the invention will become apparent from the following description of exemplary embodiments, with reference to a drawing, in which

1 shows a perspective view of a terminal according to the invention,

2 a plan view of the terminal after 1 shows,

3 a side view of the terminal after 1 and 2 shows,

4 a connection situation with a round conductor and a ribbon conductor in a plan view accordingly 2 shows, in 4a and 4b enlarged partial areas are shown,

5 the connection situation after 4 in a side view accordingly 3 explains 5a shows an enlarged partial area,

6 the connection situation after 4 and 5 in a perspective view shows

7 1 shows a plan view of a lower part of a connection box according to the invention, which is equipped with six connection terminals according to the invention,

8th a perspective view of the base after 7 shows,

9 a sectional view taken along line IX - IX in 7 shows,

10 a view of the lower part from the front in the direction of X in 7 shows,

11 a side view of the lower part in the direction XI in 7 shows, and

12 a perspective view of an insulating cover plate shows.

First up 1 to 3 Reference is made showing a terminal according to the invention in different views. The whole with 1 designated terminal consists of a busbar 2 at a first end section 2a a first spring clamp connection 4 and at a second end portion 2 B a second spring clamp connection 6 having. In a middle area of the busbar 2 are two third spring clamp connections 8th . 10 arranged.

The first spring clamp connection 4 serves the clamping contact of a round conductor (single or fine stranded round conductor) with a cross section of, for example, up to 6 mm ² or more. For this purpose, the first spring clamp connection 4 a per se known spring terminal (spring terminal) 12 on, which is made of tempered spring steel and a receiving window 14 for a to be connected round conductor. For holding the spring-loaded terminal 12 has the busbar 2 at its end section 2a an area 17 with a smaller width, the inner dimension of the recording window 14 corresponds and is also angled, in particular 2 shows, so that the spring clamp 12 due to their spring bias safely on the power rail 2 is held.

The busbar 2 points in the area of its first end section 2a a double angled abutment section 16 on which the spring clamp 12 encompasses and in the empty state (no conductor connected) according to 1 to 3 a gap 18 to the spring clamp 12 forms, in the example. A screwdriver can be inserted to the spring terminal 12 to open.

The second spring clamp connection 6 is by two opposing bends of the busbar 2 formed, which has a contact leg 20 and a spring leg 22 form. The contact leg 20 is flat and parallel to a longitudinal direction 21 the busbar 2 formed with an insertion direction 24 for in the second spring clamp connection 6 to be inserted flat conductor coincides. To limit the insertion depth, the contact leg 20 an angled stop 26 on.

The spring leg 22 goes from one parallel to the contact leg 20 trained holding section 28 and has two parallel, rectangular punched out 30 on, through which the spring leg 22 in three single legs 22a . 22b . 22c divided, in turn, in the area of their from the holding section 28 turned away ends by a crosspiece 32 connected to each other. The advantage of this design is that the cross bar 32 in his position to possibly locally different thickness flat ribbon conductor can adjust and at the same time transmits the full spring force of all three single leg on a flat ribbon conductor width.

The spring leg 22 is opposite to the insertion direction 24 or with respect to the plane of the contact leg 20 Angled at an angle α of about 45 °, wherein the spring leg partially points in the direction of insertion and also at its free, the contact leg 20 is formed sharp-edged end, s. 3 , Due to this arrangement, the contact pressure of the spring leg against the contact legs is still increased when an inserted ribbon conductor against the insertion direction 24 is subjected to a tensile force, so that an effective pull-out protection is formed for the ribbon conductor. With appropriate design of the angle α, below the spring leg with respect to the insertion direction 24 or the contact leg 20 is angled, self-locking is achieved, ie an inserted ribbon cable can not be pulled out without the spring leg 22 relieved or opened.

The two third spring clamp connections 8th . 10 are identical to each other and each have a spring leg 36 on, by punching out a corresponding part of the busbar 2 and made by subsequent double bending. Because of its mean bend 38 can the spring leg 36 an inserted round conductor centered and record spring loaded. For better guidance and support of an inserted round conductor, every third spring clamp connection 8th . 10 a guide opening 39 on, passing through a punched-out opening in an angled area 41 the busbar 2 is formed.

4 to 6 explain how a round ladder 40 and a ribbon conductor 42 be connected to the terminal. 4 and 4b show how the round conductor 40 through the spring-loaded terminal 12 contacting against the busbar 2 is pressed after going through the recording window 14 has been inserted with open spring clamp. 4 . 5 and 5a show the contact of the ribbon conductor 42 by the spring leg 22 against the facing to this surface of the contact leg 20 is pressed. 4a shows the area of the third spring clamp connections 8th . 10 which, for example, serve to receive a connecting wire (round conductor) of a bypass diode in the case of the application of the terminal in a connection box for photovoltaic modules, as will become clear below.

Other than illustrated, the busbar could 2 be provided with solder pins, so that they can be soldered as a PCB terminal in a circuit board.

In particular 3 clearly shows, is the power rail 2 designed so that it the spring clamp 12 receives in an arrangement in which it with its width direction perpendicular to the plane of the contact leg 20 (Plane of a male flat ribbon conductor 42 ), ie, so that the spring clamp 12 as a whole in the plane of the male ribbon conductor 42 lies. As a result, the overall height of the invention is terminal clamp, measured perpendicular to the plane of representation in 2 , as low as possible, because the spring clamp 12 lying or in the plane of the ribbon conductor is arranged.

As can be seen from the illustrations, the busbar is 2 made in one piece from a flat sheet metal material, with all Federklemmanschlüsse, with the exception of the inserted spring clamp 12 , are formed by punching and folding of the sheet material.

7 to 12 serve to explain a junction box according to the invention 50 for round and flat conductor, which is particularly suitable for connection of photovoltaic modules.

As 7 and 8th show, points the junction box 50 a lower part 52 aufzusetzenden with a (not shown), along a final contour 53 tightly closed lid is closed and with six terminals according to the invention 1 is provided. For receiving and fixing the terminals 1 has the lower part 52 a bottom wall 54 on, in the receiving recesses or holding webs 55 for positive retention and fixation of the terminals 1 are formed, wherein the terminals are arranged parallel to each other.

7 and 8th show further that the terminals 1 are arranged lying, wherein the second Federklemmanschlüsse 6 are horizontal, ie, so that the ribbon conductors lie in a common plane and in a plane with the junction box, and so that the spring-loaded terminals 12 the first spring clamp connections 4 lie in the same plane, whereby a minimum height is achieved perpendicular to the common plane.

As 9 shows, has the lower part 52 an opening on the underside 56 for performing ribbon cables, wherein the insertion direction 24 is also indicated.

On his the implementation opening 56 opposite side, ie before the first Federklemmanschlüssen 4 the terminals 1 , shows the lower part 52 a protruding protection area 58 whose purpose is a glass surface or other sensitive surface on which the junction box or the lower part 52 is fixed to protect during installation of connecting cables, in the event that a fitter with a wrench 60 should slip off.

Adjacent to the duct 56 has the lower part 52 a recording room 62 for receiving from an opening of the receiving box 50 carrying surface exiting ribbon conductors, so that they are completely covered and protected, wherein the receiving space 62 through a corresponding housing section 64 of the lower part 52 is formed.

8th also shows the equipment of the terminals 1 with the already mentioned bypass diodes 66 , which are held with their leads in the third spring clamp connections.

12 shows in a perspective view an electrically insulating cover plate 70 in the assembled state of the junction box 50 on the mounted and contacted with round and flat conductors terminals 1 is put on before the bypass diodes 66 in the contacts 8th . 10 the busbars 2 be plugged in. This is a most extensive protection against contact for a fitter, the maintenance or the like. performs, given.

1

terminal

2

conductor rail

2a

first end

2 B

second end

4

first Spring clamp connection

6

second Spring clamp connection

8th, 10

third Spring clamp connection

12

Spring terminal

14

Capture window

16

Abutment portion

17

Area smaller width

18

gap

20

contact legs

21

Longitudinal direction (v. 2 )

22

spring leg

22a, b, c

Single leg

24

insertion direction

28

holding section

30

punching

32

crosspiece

36

spring leg

38

angling

39

guide opening

40

round conductor

41

angled Area

42

Ribbon cable conductors

50

junction box

52

lower part

53

close contour

54

bottom wall

55

holding web

56

Through opening

58

protection area

60

wrench

62

accommodation space

64

housing section

66

Bypass diode

70

cover

α

angle

Claims (17)

Terminal ( 1 ) for multiple conductors, with a busbar ( 2 ) and several spring clamp connections ( 4 . 6 . 8th . 10 ) for contacting the conductors with the busbar ( 2 ), wherein at least one first spring clamp connection ( 4 ) for receiving a round conductor ( 40 ) by the arrangement of a cage tension spring ( 12 ) on a first end of the busbar ( 2 ) is formed and at least one second spring clamp connection ( 6 ) for receiving a ribbon conductor ( 42 ) by the arrangement of a pawl spring on the second end of the busbar ( 2 ), characterized in that the second spring clamp connection ( 6 ) in one piece with the busbar ( 2 ) is formed, wherein at the second end of the busbar ( 2 ) from a side edge thereof a first side wall, which is angled perpendicular to the busbar plane and as a contact leg ( 20 ), is formed, and wherein on the opposite side edge of the busbar ( 2 ) a second side wall, the contact leg ( 20 ) is formed opposite, of which a part of the busbar ( 2 ), which are used as spring legs ( 22 ), wherein the spring leg ( 22 ) at an acute angle (α) to the direction of insertion of the flat-band conductor to be contacted ( 42 ) to the contact leg ( 20 ) is angled away, so that an edge of the free spring leg end resiliently against the contact leg ( 20 ) is biased. Terminal according to claim 1, characterized in that the spring leg ( 22 ) at an angle (α) of between 20 ° and 80 °, in particular 45 °, to the insertion direction ( 24 ) is angled. Terminal according to Claim 1 or 2, characterized in that the spring leg ( 22 ) into a plurality of juxtaposed individual legs ( 22a , b, c) is divided. Terminal according to Claim 3, characterized in that the contact leg ( 20 ) facing end portions of the individual legs ( 22a , b, c) are interconnected. Terminal according to one of the preceding claims, characterized in that the busbar ( 2 ) an abutment section ( 16 ) as an opening aid for the spring-loaded terminal ( 12 ) having. Terminal according to one of the preceding claims, characterized in that between the first ( 4 ) and second spring clamp connection ( 6 ) at least one third spring clamp connection ( 8th . 10 ) is arranged. Terminal according to Claim 6, characterized in that two third spring clamp connections ( 8th . 10 ) are provided, each one against the busbar ( 2 ) acting spring legs ( 36 ) exhibit. Terminal according to Claim 7, characterized in that the spring leg ( 36 ) by punching out of the busbar ( 2 ) is formed and has an angled portion for centering receiving a round conductor. Terminal according to Claim 7 or 8, characterized in that every third spring clamp connection ( 8th . 10 ) a guide opening ( 38 ) for a male round conductor in alignment with the spring leg ( 36 ) having. Connection box ( 50 ) for round and flat conductor, in particular for photovoltaic modules, with several terminals ( 1 ), each for a plurality of conductors, each terminal ( 1 ) a busbar ( 2 ) and several spring clamp connections ( 4 . 6 . 8th . 10 ) for contacting the conductors with the busbar ( 2 ), wherein at least one first spring clamp connection ( 4 ) for receiving a round conductor ( 40 ) by the arrangement of a cage tension spring ( 12 ) on a first end of the busbar ( 2 ) is formed and at least one second spring clamp connection ( 6 ) for receiving a ribbon conductor ( 42 ) by the arrangement of a pawl spring on the second end of the busbar ( 2 ) is formed, and wherein on the opposite side edge of the busbar ( 2 ) a second side wall, the contact leg ( 20 ) is formed opposite, of which a part of the busbar ( 2 ), which are used as spring legs ( 22 ), wherein the spring leg ( 22 ) at an acute angle (α) to the direction of insertion of the flat-band conductor to be contacted ( 42 ) to the contact leg ( 20 ) is angled away, so that an edge of the free spring leg end resiliently against the contact leg ( 20 ) is biased. Connection box according to claim 10, characterized in that the terminals ( 1 ) in a lower part ( 52 ), which is closed with an attached, tight-fitting lid. Connection box according to claim 11, characterized in that the lower part ( 52 ) a floor wall ( 54 ), in the receiving recesses and / or retaining webs for positive retention of the terminals ( 1 ) are formed side by side in a parallel arrangement. Connection box according to claim 11 or 12, characterized in that the lower part ( 52 ) adjacent to the first spring clamp connections ( 4 ) a projecting protective surface ( 58 ) having. Connection box according to one of claims 10 to 13, characterized by a bottom-side lead-through opening ( 56 ) for performing ribbon conductors ( 42 ). Connection box according to one of claims 10 to 14, characterized in that adjacent terminals ( 1 ) each by a bypass diode ( 66 ) are connected. Junction box according to claim 15, characterized in that between terminals ( 1 ) and bypass diodes ( 66 ) an electrically insulating cover plate ( 70 ) is arranged as a contact protection. Connection box according to one of claims 10 to 16, characterized in that the terminals ( 1 ) are arranged in a plane and within the plane such that the contact legs ( 20 ) lie in the same plane, so that in the connected state all connected ribbon conductors lie in a common plane and a smallest possible height in the direction perpendicular to the common plane is achieved.