DE102008033905A1 - Conductor connection element for attaching electrical conductor, has sharp-edged insulation cuts that are aligned at angle which is less than angle at which contact-cuts are aligned with respect to longitudinal extension axis of slot - Google Patents

Abstract

The element has an insulation-displacement-contact (1) with a cutting area (S) and a clamping area (K). The clamping area clampingly contacts an electrical conductor (5), when the line is inserted into an insertion slot (3) in the contact. Sharp-edged insulation cuts (7a, 7b) are aligned at an angle (beta) with respect to a longitudinal extension axis of the insertion slot. Contact-cuts (8a, 8b) are aligned at an angle (alpha) with respect to the axis, where the angle (beta) is lesser than the angle (alpha). The insulation-displacement-contact is made of steel sheet element.

Description

The The invention relates to a conductor connection element having at least one Cutting clamp contact with a cutting area for separating the Insulation of a line to be clamped and with a clamping area for Klemmkontaktierung the electrical conductor of the line, if the line into a slot of the insulation displacement contact is inserted.

Feeder terminals with insulation displacement contacts, also called IDC contacts, are sufficient known. The insulation displacement contacts have the advantage that the Stripping of the conductor at the terminal point and the clamping of the Ladder is done in one step. For this purpose have insulation displacement contacts a cutting area in which the insulation of the electrical conductor is cut open and displaced and a clamping area, in which the formed of electrically conductive sheet material insulation displacement contact is clamped to the electrical conductor.

Such insulation displacement contact is for example from the DE 28 40 277 C2 known.

The Stripping the conductor insulation is through a slot in the insulating body performed the clamping contact.

DE 35 22 131 C2 discloses a device for pre-cutting the insulating sheath of cable cores prior to connection to insulation displacement contacts. Such pre-cutting is an additional operation that is undesirable. In cable cores with thick cable cross-sections and in particular a multi-layer insulation so far such pre-cutting is usually required to reduce the impression forces and to prevent too wide bending of the insertion slot when inserting the conductor. The disclosed insulation displacement contacts have a three-level tapered insertion slot.

DE 603 10 277 T2 discloses an insulation piercing device for removing insulation of an electrical conductor to prevent its inadmissibly large expansion when attaching a conductor to a insulation displacement contact. The insulation displacement contacts are stamped from a thin conductive metal plate, the terminal part of the insulation displacement contact having a pair of flat blades each having a U-shaped slot into which the non-stripped wire end is pressed.

outgoing It is the object of the present invention to provide a conductor connection element with an improved insulation displacement contact, too thick or multi-layered insulation without previous stripping electrical conductor at least partially severed and then in a clamping area thereby at least partially exposed contacted electrical conductor without the clamping area through the previous insulation penetration widens too far.

• – dass im Schneidbereich entgegen der Einsteckrichtung der Leitung zum freien Ende des Einsteckschlitzes weisende, in einem ersten Winkel im Bezug zur Längserstreckungsachse des Einsteckschlitzes ausgerichtete, scharfkantige I solierungs-Schneiden beidseits des Einsteckschlitzes durch den Einsteckschlitz voneinander beabstandet angeordnet sind und
• – dass im Klemmbereich von entgegen der Einsteckrichtung der Leitung zum freien Ende des Einsteckschlitzes weisende, in einem zweiten Winkel im Bezug zur Längserstreckungsachse des Einsteckschlitzes ausgerichtete Kontaktierungs-Schneiden beidseits des Einsteckschlitzes durch den Einsteckschlitz voneinander beabstandet angeordnet sind,
• – wobei der erste Winkel kleiner als der zweite Winkel ist.

The object is achieved with the conductor connection element of the type mentioned above,

• - That in the cutting area opposite to the insertion direction of the line to the free end of the insertion slot pointing, aligned at a first angle with respect to the longitudinal axis of the Einsteckschlitzes aligned, sharp-edged cutting edges on both sides of the Einsteckschlitzes are spaced apart by the insertion slot and
• - That in the clamping region of opposite to the insertion direction of the line to the free end of the insertion slot facing, arranged at a second angle with respect to the longitudinal extension axis of the Einsteckschlitzes contacting blades are arranged spaced apart on both sides of the Einsteckschlitzes by the insertion slot,
• - wherein the first angle is smaller than the second angle.

Thereby, that at least a pair of sharp-edged insulation cutting the Contacting cutting provided in the insertion slot upstream At first, the insulation can cut through the insulation be cut free, after which a contact with the separate Contacting cutting done. In this way, the contacting blades Relieves and widening of the Ansteckschlitzes largely prevented.

Thereby, that the first angle of the insulation cutting to the alignment of the insertion slot smaller when the second angle is the contacting cutting is achieved that the insulation cutters are aligned more sharp-edged for insulation are as the contacting blades. This is how the separation works the insulation improves and prevents the electrical conductor damaged by the flattened contacting blades becomes. The electrical conductor itself can be a one-wire Be conductor or a stranded conductor (strand). Especially Strands are prone to damage from sharp edges aligned cutting.

The insulation cutting edges are sharp-edged and aligned to escape the insertion slot or to the insertion direction at a first, preferably acute angle (<90 °), so that each insulation cutting edge in the direction of the conductor tion during insertion of the conductor in the insertion slot facing tooth.

The Insulation cutting itself preferably has an angle of 70-110 ° and more preferably about 90 ° and smaller.

By The acute-angled insulation cutting edges are the insulation and in particular an outer insulation layer cut and displaced in the longitudinal direction of the conductor. The in the second, preferably obtuse angle (<90 °) aligned contacting cutting on the other hand separate the remaining insulation, such as a inner insulation layer, without, for example, single wires of a stranded electrical conductor to damage.

Especially It is advantageous if the insulation cutting edges entangled are. The insulation cutting edges are at an angle to the insertion axis placed so that the insulation cutting over the surface protrude the plate-shaped insulation displacement contact. Due to this limitation of the insulation cutting can be a wider Free cut in the insulation, so that the contacting cutting be further relieved. For an entanglement should preferably at least two successively arranged pairs of Isolation cutting be present, the opposite to each other are entangled to the insulation on both sides of the Extension direction of the line to displace.

In an advantageous embodiment of the insulation displacement contact a multi-stage free cutting of the insulation takes place before immersion in the contacting cutting through several, in the insertion direction successively arranged pairs of insulation cutting edges. Preferably are in the insertion of a conductor from the free end of the insertion slot to the closed end of the insertion slot seen two pairs arranged by insulation cutting one behind the other. The contacting area then closes with a pair of contacting blades at, wherein the distance of a pair of blades from the free end to closed end becomes lower. Through the arranged one behind the other Cutting the insulation is thus cut through successively deeper.

Of the Contacting area is preferably designed so that the Distance of the insertion slot in the area of the contacting cutting edges starting from the cutting edge of the contacting blades for closed end of the insertion slot decreases continuously. The non-sharp-edged contacting blade with its second (duller) angle can be in the residual insulation for safe contacting push away and the electrical conductor is under assuring a clamping contact in the narrowing region or preferred in an adjoining clamping area with the same remaining width of the insertion slot contacted.

The Cutting terminal contacts are preferably made of a sheet metal element punched out.

The Invention will be described below with reference to embodiments explained in more detail with the accompanying drawings. Show it:

1 - Sketch of a section of an insulation displacement contact with insulated electrical conductor;

2a ) to e) - Sketches of insulation displacement contact 1 with the sequence of putting on, plugging and clamping the conductor;

3 - Sketch of insulation displacement contact 1 ;

4 - Side view of the insulation displacement contact 3 ;

5 - Partial view of the insulation displacement contact 3 in the insulation displacement area;

6 - Sketch of a second embodiment of an insulation displacement contact with two pairs of insulation cutting;

7 - Sectional view of the cutting and clamping area of the insulation displacement contact 6 ;

8th - Sketch of a third embodiment of an insulation displacement contact with entangled insulation cutting;

9 - Side view of the insulation displacement contact 8th with the entangled insulation edges;

10 - Sketch of a fourth embodiment of an insulation displacement contact with staggered insulation cutting edges;

11 - Sectional view of the cutting and clamping area of the insulation displacement contact 10 ,

1 leaves a sketch of a section of the insulation displacement contact 1 recognize for a conductor connection element, the ei for clamping electrical conductor 2 is provided. The insulation displacement contact 1 is in a known manner made of an electrically conductive sheet metal element and has two through a Einsteckschlitz 3 spaced apart clamping legs 4a . 4b , The cable to be clamped has an electrical conductor 5 by at least one insulation layer, here an inner insulation 6a and an outer insulation 6b , insulated from the outside. In one step, the insulation 6a . 6b to separate and the electrical conductor 5 expose in the area of the clamping point and on the clamping leg 4a . 4b clamp, a cutting area S is provided in the upper region of the insulation displacement contact, which adjoins the free end of the insertion slot 3 followed. In the cutting area are a pair of opposing insulation cutting edges 7a . 7b intended to separate at least the outer insulation 6b serve. The insulation cutting 7a . 7b are sharp-edged and at the first angle β to escape F of the insertion slot 3 arranged. The first angle β is an acute angle of β ≤ 90 °. The distance between the two insulation cutting edges 7a . 7b should be larger than the width of the electrical conductor 5 so as not to damage it. The angle δ between the two cutting edges of the insulation cutting 7a . 7b is preferably in the range of 70 to 110 °. This angle δ should preferably be in the range of about 90 ° or less.

The insulation cutting 7a . 7b are aligned so that their tip counter to the insertion direction E of the line 2 points to this way with its tip when plugging the line 2 on the insulation displacement contact 1 in the insertion direction E, first the outer insulation 6b and then, if necessary, the inner insulation 6a split up and push away in the direction of extension of the line.

Below the insulation cutting 7a . 7b is a pair of contacting blades 8a . 8b arranged, which also through the insertion slot 3 spaced from each other and are aligned opposite each other. The contacting cutting 8a . 8b form the initial region of a contacting area K, in which possibly remaining insulation is separated and pushed away and an electrical contacting of the now exposed electrical conductor 5 to the clamping leg 4a . 4b is ensured. The contacting cutting 8a . 8b are not sharp-edged and are at a second angle α to escape F of the insertion slot 3 arranged. The second angle α is greater than the first angle β and is preferably an obtuse angle of α ≥ 90 °. This ensures that residual insulation can be pushed away for safe contacting and the electrical conductor or individual wires of a stranded conductor is not or not excessively damaged.

It can be seen that the width of the insertion slot 3 from the free end in the insertion direction E to the closed end (not shown) of the insertion slot 3 decreases. So are the insulation cutting 7a . 7b spaced farther apart than the contacting blades 8a . 8b , To the cutting edges of the contacting cutting 8a . 8b closes an area of the insertion slot 3 which tapers.

2a to 2d let the process of clamping a line 2 to the insulation displacement contact 1 detect.

2a shows the attachment position of the line 2 on the insulation displacement contact 1 corresponding 1 ,

When attaching the cable further 2 cut through the insulation edges 7a . 7b the outer insulation 6b , as in 2 B is recognizable.

Out 2c becomes clear that after further immersion of the line 2 in the insulation displacement contact 1 the inner insulation 6b now through the contacting cutting 8a . 8b touched and separated, as the distance of the insulation cutting 7a . 7b is not enough to the inner insulation 6a or to separate a substantial part of it. The distance between the contacting blades 8a . 8b On the other hand, it is smaller and should be connected to the cross-section of the electrical conductor 5 be adjusted.

2d lets recognize the condition in which the inner and outer insulation 6a . 6b through the insulation cutting 7a . 7b and the contacting blades 8a . 8b as far as severed and pushed aside, that the electrical conductor 5 Largely exposed and in the contact area K to the tapered flanks of the contacting cutting 8a . 8b is clamped. If necessary, remaining residual insulation is still pushed away.

2e lets you know the condition in which the line is 2 completely on the insulation displacement contact 1 is attached. The inner and outer insulation 6a . 6b is now through the insulation cutting 7a . 7b and the contacting blades 8a . 8b as far as severed and pushed aside, that the electrical conductor 5 exposed and in the contact area K to the now parallel with the same distance arranged flanks (in a parallel region) of the clamping legs 4a . 4b is clamped. As a result, an electrical contact between the electrical conductor 5 and the insulation displacement contact 1 ensured and counteracted by the parallel alignment of the clamping edges slipping out of the conductor and releasing the contact, for example, caused by vibration.

3 leaves a view of the plate-shaped insulation displacement contact 1 recognize, which is formed of a sheet metal element. To the insulation displacement contact 1 can in a conventional manner further connection contacts, such as screw, spring contacts or busbars integrally formed or attached as separate parts.

It can clearly be seen that the insertion slot from the closed end in the connection region of the wide clamping legs 4a . 4b is aligned to a free end. In an adjacent to the free end cutting area S is the insertion slot 3 much wider than in the clamping area K. It is clear that the insertion slot 3 in the clamping area of the contacting blades 8a . 8b starting conically tapered in the direction towards the closed end, then to pass in a region of constant width, which then widened again towards the closed end. The clamping legs 4a . 4b are aligned facing each other in this area to exert a spring clamping force on the clamping area K.

Visible are also the opposing sharp-edged insulation cutting 7a . 7b and the opposed non-sharp contacting blades 8a . 8b ,

4 leaves a side view of the insulation displacement contact 1 out 3 detect. It is clear that the thickness of the plate-like insulation displacement contact is substantially lower than that of the 4 recognizable width.

5 leaves a section in the cutting and clamping area S, K of the insulation displacement contact 1 out 3 detect. The section is indicated by the circular dashed line in 3 indicated.

From the sectional view, the radially curved free ends of the clamping legs 4a . 4b and the radial transition to the insulation cutting edges 7a . 7b and contacting cutting 8a . 8b clear. It is also recognizable that the angle of the cutting surfaces of the insulation cutting 7a . 7b is about 90 ° and the top of the insulation cutting 7a . 7b pointing pointed into the insertion slot.

6 shows a view of a second embodiment of an insulation displacement contact, in the insertion direction E two pairs of insulation cutting 7a . 7b and 7c . 7d arranged one behind the other. This is a multi-stage cutting free of thick or multiple insulation 6a . 6b possible. Due to the mirror-symmetrical arrangement of the insulation and contacting blades 7a to 7d and 8a . 8b with respect to the Flicht F of the insertion slot 3 becomes a line to be inserted 2 automatically centered in the middle.

7 leaves a cutout in the cutting and clamping area S, K of the insulation displacement contact 6 recognize that in the 6 is interpreted as a dashed circle on. It is clear that seen in the insertion direction first a first pair of insulation cutting 7a . 7b are arranged at a greater distance from each other, as a subsequent second pair of insulation cutting 7c . 7d , which in turn have a much greater distance from each other, as the contacting blades 8a . 8b ,

Through the two successively arranged pairs of insulation cutting 7a . 7b and 7c . 7d with different spacing is achieved that initially a first part of the insulation 6b through the front insulation cutting 7a . 7b is separated and then through the second rear pair of insulation cutting 7c and 7d the further part of the insulation 6a is severed, resulting in a further relief of the contacting cutting 8a . 8b leads and unnecessary expansion of the clamping legs 4a . 4b during Aufsteckvorgang the line 2 prevented.

8th shows a view of a third embodiment of an insulation displacement contact 1 recognize the entangled insulation cutting 7a to 7d Has. The insulation cutting 7a to 7d are, as seen from the side of the 9 can be seen, obliquely to the escape of the insertion slot 3 placed and protrude over the surface of the plate-like insulation displacement contact 1 out. In the embodiment of two pairs of insulation cutting 7a . 7b and 7c . 7d are the pairs of insulation cutting 7a . 7b and 7c . 7d crossed opposite to each other.

By the entanglement of the insulation cutting 7a to 7d becomes a wider cut in the insulation 6a . 6b reached. This entanglement is not limited to the illustrated embodiment of two pairs of insulation cutters 7a to 7d limited, but can also cut at a pair of insulation 7a . 7b according to 3 or even more than two pairs of insulation cutting edges 7a to 7d be provided.

10 shows a fourth embodiment of an insulation displacement contact 1 recognize that in principle with the Ausführungsfor described above can be combined. Essential characteristic feature of this, in the sectional view of the 11 more clearly discernible embodiment is that no gegenüberlie ing pairs of insulation cutting 7a . 7b are present, but on both sides of the insertion slot 3 arranged insulation cutting 7a . 7b . 7c in the insertion direction E are arranged offset from one another. This can be done on a first clamping leg 4a less insulation cutting 7 as at the opposite second clamping leg 4b be arranged. It is also conceivable, however, that each clamping leg 4a . 4b the same number of insulation cutting edges 7 but these are not opposite each other at the same height, but offset from one another.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 2840277 C2 [0003]
• - DE 3522131 C2 [0005]
• - DE 60310277 T2 [0006]

Claims (6)

Conductor connection element with at least one insulation displacement contact ( 1 ) with a cutting area (S) for separating the insulation ( 6a . 6b ) of a line to be clamped ( 2 ) and with a clamping region (K) for Klemmkontaktierung of the electrical conductor ( 5 ) of the line ( 2 ), if the line ( 2 ) into a slot ( 3 ) of the insulation displacement contact ( 1 ) is inserted, characterized in that - in the cutting area (S) opposite to the insertion direction (E) of the line ( 2 ) to the free end of the insertion slot ( 3 ), at a first angle (β) with respect to the longitudinal axis of the insertion slot (FIG. 3 ) aligned, sharp-edged insulation cutting ( 7 ) on both sides of the insertion slot ( 3 ) through the insertion slot ( 3 ) are spaced from each other, and - that in the clamping region (K) against the insertion direction (E) of the line ( 2 ) to the free end of the insertion slot ( 3 ) pointing at a second angle (α) with respect to the longitudinal axis of the insertion slot ( 3 ) aligned contacting blades ( 8th ) on both sides of the insertion slot ( 3 ) through the insertion slot ( 3 ) are spaced from each other, - wherein the first angle is smaller than the second angle. Conductor connection element according to Claim 1, characterized that the first angle is an acute angle smaller than 90 ° and the second angle is an obtuse angle greater than 90 ° is. Conductor connection element according to claim 1 or 2, characterized in that the insulation cutting ( 7 ) are entangled. Conductor connection element according to one of claims 1 to 3, characterized in that in the insertion direction (E) of a line ( 2 ) from the free end of the insertion slot ( 3 ) to the closed end of the insertion slot ( 3 ) seen on at least one side at least two insulation cutting ( 7 ) are arranged one behind the other and the contacting region (K) with the contacting blades ( 8th ), wherein the distance of a pair of blades from the free end to the closed end of the insertion slot ( 3 ) decreases. Conductor connection element according to one of the preceding claims, characterized in that the distance of the insertion slot ( 3 ) in the area of contacting cutting edges ( 8th ) decreases continuously. Conductor connection element according to one of the preceding claims, characterized in that the insulation displacement contact ( 1 ) is punched out of a sheet metal element.