JPH0340469B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention comprises a plastic body, a positioning body consisting of an upper and a lower clamping body, and a contact element of identical metal molded from a sheet metal stamping, the contact element being a pair of identical contact knives arranged in parallel in the through-hole of the plastic body and supported by the plastic body and each provided with a longitudinal slit in order to absorb the axial cutting resistance that occurs during the contact connection; contact body for a cable connection device for simultaneous contact connection (complete contact connection restoration) of coated cable cores fixed in parallel at mutual intervals in a positioning body, having Regarding the manufacturing method.

In the case of conventional contact bodies of the type mentioned above (Utility Model Application No. 57-173272 and Utility Model Application No. 57-182875), the contact end opposite the contact knife is formed as a contact bushing. There is. For this reason, it is necessary to insert a separate pin rod in each case between the contact body and the associated contact body on the printed circuit board, the contact pins of which on the one hand being connected to the bushings of the contact elements of the contact body and on the other hand. It is contact-connected to the bushing of the printed circuit board.

In the case of the known contact body of the type mentioned at the outset (DE 27 47 264 A1), the connection body is designed as a contact bushing which is arranged in a plastic body. For this reason, when electrically connecting the cable connection device and the printed circuit board, it is necessary to provide a separate pin bar between the contact body and the printed circuit board, the contact pins of this pin bar being connected to the contacts of the contact body on the one hand. It is contact-connected to the bushing and, on the other hand, to the compact bushing of the printed circuit board. The contact elements of the known contact body are arranged in a single row in the plastic body and are each symmetrically formed with respect to a plane perpendicular to this row. As a result, the number of cable cores that can be contacted by the contact knife of the contact body is significantly limited relative to the length of the contact element. This is because only a single row of contact connections is made. Furthermore, with this embodiment, the contact elements can be individually separated from the foil strip and inserted individually into the plastic body. Therefore, expensive automatic loading equipment is required.

Furthermore, in the case of the known contact element, the contact knife itself is fixed in the contacting position in the hollow space of the plastic body during the contacting process and is deformed along an oblique surface. In this case, the amount and type of deformation of the individual contact elements is not uniform and, moreover, considerable axial pressure must be applied during the contact connection.

Furthermore, contact elements for connecting insulated wires are known (German Patent Application No. 25 41 064), which contact elements are arranged symmetrically in a plane of symmetry perpendicular to the contact element axis. It is formed by bending it. In this case, the foil sections folded together in the folding plane form contact pins. The contact knives are bent out via the bent out section of the lamella in such a way that they are spaced apart from each other and mirror symmetrical with respect to the folding plane. In the case of this terminal element, the contact knife and the longitudinal edge on the back side of the contact knife trunk are flanged for reinforcement. Although this flaring improves the dimensional stability of the terminal element so as to have an advantageous effect on the contact connection properties, such a flange requires an additional manufacturing process.

Owing to the relatively high production costs, this known terminal element is unsuitable for producing contact bodies for cable connection devices.

With contact bodies for cable connection devices of a similar type, it is also known to form the contact elements in such a way that two rows of contact connections can be made in the nominal dimensions and to arrange them in two rows in the pushpiece body (Germany). (Federal Republic Patent Application No. 273624). However, this contact element is formed from a simple symmetrically unfolded sheet metal stamping with only a single contact knife.

The object of the invention is to improve a contact body of the type mentioned at the outset in such a way that it can withstand extremely high mechanical loads when making a complete contact with the cable core and when contacting the contact body. Furthermore, it is possible to make a direct contact connection between the contact elements of the contact body and the contact bushings of the printed circuit board, in particular for mounting the contact elements on the plastic body of the contact body for economical mass production. The goal is to be able to meet the requirements related to this.

According to the invention, said object is achieved by providing that the contact element consists of a lamella folded by 180° with a bent edge in a plane of symmetry perpendicular to the contact element axis; A contact pin in which the lamina sections touching each other in a folding plane defined by a plane form a contact pin, the central section of the folded lamina passing approximately through the contact pin axis perpendicular to the folding plane It is divided by a notch in the longitudinal direction along a plane, and is bent so that one division condition of the divided central section is located symmetrically with respect to the folding plane at mutual intervals. transitioning through the section to the bent-out contact knife, and the other section is retracted against the contact knife and forms an abutment edge that abuts the lower clamping body of the positioning body; The solution is that the contact knife has an abutment edge which is supported in a recess in the plastic body.

In such a configuration, an area for the contact knife is secured on the plane (starting plane) of the thin metal sheet as a raw material, and this area is bent as a contact knife to be placed parallel to the plane of the thin metal sheet. Ru. As a result, compared to known contact elements (Japanese Utility Model Application Publication No. 57-182875), an extremely large number of contact elements can be punched out per unit area of a thin metal plate as a raw material. In the case of the known contact element (JP-A-57-182575), the corresponding planar area of the metal plate is bent by 90° and placed at right angles to the starting plane, the bent edge forming the contact element. Extends parallel to the direction of insertion. Furthermore, the configuration of the invention described above makes it possible to produce the contact elements in a satisfactory and economical manner in large quantities. This is because the contact elements, which are still connected by the edge strips of the stamped sheet metal, can be attached to the plastic body of the contact body with a corresponding distance by a single linear movement in the connecting body. This is because the contact pins are slightly spaced from each other so that they can be inserted into the through holes of the contact pins, and the contact pins are formed by bending by 180°.

In a known method (Japanese Utility Model Application No. 57-182875), the contact knife is formed by bending the flat areas of the thin strip (metal thin plate) by 90 degrees from the plane of the thin strip as a pair of contact knives. It is formed. This manufacturing method necessarily results in the spacing of the individual contact elements in the foil strip being greater than the spacing of the through holes in the plastic body of the contact body. Therefore, the contact elements must be individually installed in the through holes sequentially over time by an automatic installation device.

According to the invention, this known method is improved by the method defined in claim 6.
In other words, according to the invention, in the method for manufacturing a contact body of the type mentioned at the outset, a thin metal strip is punched out in order to form a contact element with a contact knife, so that the plane of symmetry is parallel to the longitudinal direction of the thin strip. double-sided symmetrical lamina strips, laterally surrounded on both sides by edge strips, which extend and are separated from each other except in a defined area to form a contact knife (knife area) and then separating the foil strips from one another in the knife region and bending them out of the foil strip plane through one bending section in each case to form a contact knife lying parallel to this plane; After cutting off one edge strip, the lamella strip is then folded over 180° in the plane of symmetry to form the contact pin and then connected to one another by the other edge strip to form the strip. A contact element consisting of two parts was simultaneously inserted into the through-hole of the plastic body in order to sever this edge strip.

Thus, with the method according to the invention, the mutual spacing of the contact elements in the foil strip can be designed in accordance with the spacing of the through holes in the plastic body, for example 2.54 mm.
You will be able to design with This allows the contact element to be inserted as a combination of foil strips in a single linear movement, that is to say simultaneously, into the through-hole of the plastic body. This eliminates the need for uneconomical automatic mounting devices. Furthermore, the embodiment according to the invention provides that in each contact element the contact knife pair is laterally offset relative to the associated contact pin, so that a mirror-image arrangement of the contact elements in both rows of plastic bodies of the contact body is achieved. As a result, the pair of contact knives in one row are laterally shifted relative to the other row when viewed in the longitudinal direction of the contact body. As a result, the cores of the cables fixed in the positioning body in one plane and equidistant from each other are aligned alternately with the contact elements of one row and the contact elements of the other row of the plastic body of the contact body. Embodiments of the method according to the invention are set out in claim 7.

The invention will now be explained with reference to the illustrated embodiment.

When constructing a plug-in unit for connecting an electrical control machine to a cable leading to a drive group of a work machine, the cores of flat cables are fastened parallel to one another in a plane in a plane. It is common to make simultaneous contact connections to the wires using contact bodies (see FIG. 6).
As is clear from FIGS. 1 to 13, such contact bodies each have a plastic body 34.
, a positioning body, and identical contact elements 22 formed from sheet metal stampings, which are arranged in two parallel rows in the through holes 34g of the plastic body. The contact elements 22 each have a pair of identical contact knives 22a provided with a longitudinal slot 221, which contact knives protrude from the end face of the plastic body 34. When simultaneously contacting (completely contacting) the cable cores, the pair of contact knives is pushed through a recess in the positioning body (in particular FIGS. 7 and 8). In this case, the contact knives 22a each have a core wire 20y fixed in the positioning bodies 35, 36 in the area of their longitudinal slits 221.
The core material collides with the core wire, cuts the sheathing of the core wire, and comes into contact with the core wire (see FIG. 6).

In the illustrated embodiment, the positioning body consists of two clamping bodies 35, 36 (see FIGS. 7 and 8). Furthermore, as is clear from Figure 6,
The parallel core wires 20y of the cable are connected to the support bases 35a, 3 of the clamping bodies 35, 36 which are locked to each other.
It is positionally accurately tightened and fixed within the centering grooves 35e and 36e of 6f. In this case, the elastic locking tongue 35c of the lower clamping body 35 is connected to the support portion 36c.
It engages with the upper clamping body 36 within the range of . Another opposite locking tongue 35c of the lower clamping body 35 engages the plastic body 34 at the shoulder 34b (see FIG. 10).

In this way, a plug-in unit is obtained consisting of the two clamping bodies 35, 36 and the plastic body 34 with the contact element 22, as shown in FIGS. 1 and 6. tightening body 35,
36 and the plastic body of the contact body with the dovetail key 34a are constructed as shown in FIGS. 1-13. A plastic body 34 fitted with a contact element 22 for contacting the conductor is attached to the lower clamping body 3.
Along the locking tongue piece 35c of No. 5 and the central notch 3
It is guided along the centering plate 35b that protrudes into 4f, and is inserted into the positioning body by relative movement. During this movement, the contact knife 22a of the contact knife pair passes through the through-slit 35d of the lower clamping body 35 and then contacts the core wire 20y into the receiving slot 36b of the upper clamping body 36 with the holding grip 36a. (see also Figures 2 and 3).

Furthermore, as is clear from FIGS. 14 to 22,
The contact element 22 has a bent edge 22 in a plane of symmetry z-z perpendicular to the contact element axis.
The sections 22 are formed from double-sided symmetrical laminae 22d folded through 180° to form c and which abut each other at the folding plane e-e defined by the folding plane 22e of the folded laminae 22d.
f forms the contact pin 22b. Contact knife 22a of each contact knife pair
are located symmetrically with respect to the folding plane e-e via the bending section 22o of the lamella 22d, at a mutual distance from this folding plane e-e.
It is bent out from e (Figs. 14 and 22).
(see figure). The contact element 22 is formed by suitably punching out a strip-shaped metal sheet so that the narrow edges 22k of the contact knives 22a of each pair of contact knives lie in a common plane perpendicular to the folding plane ee. (see FIG. 16), and this plane is formed so that the contact pin 2
Since it passes approximately the central axis of 2b, it will hereinafter be referred to as the contact pin plane m-m. More contact knife 2
The longitudinal slot 221 of 2a is likewise located in a plane n--n tangent to the narrow edge 22m of the pin section 22f, perpendicular to the folding plane ee (see FIG. 18). Laminae 22 folded into each other
The central section 22n of d is at least partially divided by a longitudinal cut along the contact pin plane mm (see FIG. 16), in which case the central section 22n is divided by a longitudinal cut along the contact pin plane m-m.
The dividing strips bent out at a distance from each other on one side of m are each connected to a contact knife 2.
2a, whereas the dividing strip located on the other side of the contact pin plane m-m is drawn in with respect to the contact knife to form an incision lying flush with the end face of the plastic body 34. It has an edge 22h (see FIGS. 14 to 16). This cut edge 22h serves as an abutting edge.
It abuts against the lower clamping body 35 in order to absorb the axial pressure generated when the contact pin 22b is inserted. The cut edges 22i of the contact elements 22 adjacent to the plane n-n are cut in order to absorb the axial cutting resistance that occurs when contacting the conductor.
is supported in a recess 34h in the plastic body 34 (see also FIG. 11), which recess 34h is open towards the end face of the plastic body. The narrow edge 22s of the contact knife 22a following this cut edge 22i forming the abutment edge has a predetermined distance from the contact pin plane m-m;
The narrow edge 22k corresponds to this contact pin plane mm
(see Figure 16).

In particular, as is clear from FIG. 11, in one row Rv of the through holes 34g of the plastic body 34, the contact elements 22 are arranged in the other row Rv of the through holes 34g.
For contact elements within the narrow edge 22
s to the right in one column Rh and the other column Rv
They are arranged mirror-symmetrically so that they are located on the left side of the screen. As a result, the longitudinal slots 221 of the contact knives 22a in one row Rh are offset relative to the corresponding longitudinal slots in the other row Rv in the longitudinal direction of the plastic body. Due to such a shift, even though the through holes 34g of both rows Rh and Rv are aligned with each other, the core wires 20y, which are arranged parallel to each other in one plane and provided inside the tightening body, are alternately arranged in one row. It is contact-connected to the contact knife pair of Rh and to the contact knife pair of the other row Rv. In this way, when making a contact connection, the clamping body 3
The core wires 20y of the cable located closely within the centering grooves 35e and 36e of 5 and 36 can be grasped by the contact knife.

Next, the manufacturing method of the contact element is shown in Figures 19 to 22.
This will be explained based on the diagram.

As can be seen in FIG. 19, in the production of the contact element 22, in a first method step, a sheet metal strip is punched out with edge strips 22 on both sides.
A symmetrical flake strip B is formed which is laterally surrounded by q and 22q ¹ . Edge strip 22
q, 22q ¹ are connected via connecting webs 22r, 22r ¹ extending perpendicularly to the longitudinal direction of the thin strip.
It is connected to the lamina 22d of the lamella strip, and this connecting web 22r, 22r ¹ extends between each adjacent contact knife of the lamella strip. Furthermore, the plane of symmetry z-z extends parallel to the longitudinal direction of the foil strip, in which the foils 22d are separated from each other except in the area forming the contact knife 22a (knife area). .

As can be seen from FIG. 20, in a further method step the laminae 22d are separated from each other in the knife area and at the same time the central section 22n is at least partly cut in the longitudinal direction along the contact pin plane mm. The dividing strips which are divided and are located in this case on one side of the contact pin plane m-m each form a contact knife 22a, whereas the dividing strips which are located on the other side of the contact pin plane m-m each form a contact knife 22a. At the point where the piece is drawn in relative to the contact knife, it is connected via a target breaking point to a connecting web 22r that is connected to the edge strip 22q.

As can also be seen from FIG. 20, in a further method step the foils 22d are bent out of the plane of the foil strip B (starting plane) in the knife region via bending sections 22o in each case to form contact knives 22a. , this contact knife lies parallel to the starting plane after bending out.

As can also be seen from FIGS. 21 and 22, in a further method step the foil strip B is moved in the plane of symmetry zz to form the contact pin 22b after cutting off one of the edge strips 22q. By the way, the contact knives of each pair of contact knives have the same distance from the folding plane e-e, and the dividing strip passing into the connecting web 22r lies in this folding plane e-e. They will be superimposed and positioned within. This method step results in an endless contact element strip that can be rolled up, as partially illustrated in FIG.

A section corresponding at least to the length of the plastic body 34 is then unwound from the contact element strip wound up during the same operation in which this contact element strip was produced or during a separate operation. The contact elements of the partially unrolled contact element strip (see FIG. 21) are simultaneously inserted into at least one of both notch rows Rh and Rv of the through hole 34g of the plastic body 34, for example, by linear movement of the plastic body. inserted.

In each case, at the end of the linear movement of the plastic body, the cut edge 22i, ie the abutment edge, of the contact element 22 moves into the recess 34h of the plastic body 34.
It comes into contact with the inner support part. In the mounting position, the contact element 22 is fixed immovably by the locking projection 22t of the contact element (see FIGS. 11 and 16 and 18).

The described method steps for inserting the contact element 22 into the through hole 34g of the plastic body 34 include:
The unrolled contact element strip is carried out successively with another plastic body to be applied. This can be carried out semi-automatically using a suitable device, in which the contact element strip is unwound section by section from a roller and held in a stretched state, and in which the contact element strip is unwound section by section from a roller and held in a stretched state. The desired linear and pivoting movements of the applied plastic body are produced. By rotating the plastic body by 180° each around an axis extending perpendicular to the longitudinal direction of the plastic body, one row of through holes Rh in the plastic body is created.
The contact elements 22 of are arranged mirror-symmetrically with respect to the contact elements of the other through-hole row Rv.

Each contact body produced by the method described above forms a plug-in unit together with the positioning body, as illustrated in FIGS. 1 to 6. Outlet opening 3 on the plug-in side of each plug-in unit
Two rows of contact pins 22b protrude from 4c (see especially FIG. 11), and these contact pins are connected to the core wire 20y of a cable (flat cable or round cable) led to the working machine. In particular, as is clear from FIGS. 12 and 13, the through hole 34 on the left side of the row Rh when viewed in FIG.
g is spaced apart from the side edge of the plastic body 34, whereas the right-hand through-holes of this row Rh are spaced apart from the adjacent side edge and towards the side edge. It's open. In the other column Rv, this arrangement relationship is reversed. Therefore, as is clear from Fig. 12, the column Rh
The narrow edge 22k of the contact knife 22a located in the through hole 34g on the left side of the plastic body 3
4, while the narrow edge 22s of the contact knife 22a located within the right through hole 34g of this row Rh is approximately flush with the adjacent side edge of the plastic body 34. located in the same plane. Similarly, in column Rv, this arrangement relationship is reversed. This provides for both rows Rv, Rh the desired linear movement for inserting the contact elements 22 into the plastic body 34 and the pivoting movement for severing the connecting web 22r at the desired breaking point in the previously described device. It can be carried out at the same station of the device. Thus, the plastic body 34 held in this station is in the same spatial relationship as the contact elements which are periodically dispensed section by section, irrespective of whether the row Rv or the row Rh is loaded with contact elements.
This allows the contact element strip to be processed continuously and without loss.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, in which FIG. 1 is a cross-sectional view of a contact body combined with a positioning body shown in contact with a cable core, and FIGS. 2 and 3. 4 is a front view of the plastic body of the contact body provided with the contact element, FIG. 5 is a cross-sectional view of FIG. 4, and FIG. A partially sectional side view of the combined contact body; FIG. 7 shows the upper clamping body; FIG. 8 shows the lower clamping body; FIG. 9
The figure shows the plastic body of the contact body.
Figure 10 is a sectional view taken along the line X-X in Figure 12;
Figure 11 is a sectional view taken along the line XI-XI in Figure 12;
FIG. 12 is a view of the plastic body of the contact body seen from above, FIG. 13 is a view of the plastic body of FIG. 12 seen from below, and FIG. 14 is an enlarged view of the contact element of the contact body as seen from direction A in FIG. , FIG. 14a is a full-scale view of the contact element of the contact body, FIG. 15 is a front view of the lamina constituting the contact element with the contact knife bent out of the plane of the lamina strip before being folded by 180°, and FIG. 16 The figure is a plan view of FIG. 15, and FIGS. 17 and 18 are views of FIG.
FIG. 18a is a full-scale illustration of the flake according to FIG. 18; FIGS. 19, 20 and 21 each show a section of the flake strip at different process stages of the production process; FIG. FIG. 22 is a side view of the upper portion of FIG. 21. 22...Contact element, 22a...Contact knife, 22b...Contact pin, 22c...
...Bending edge, 22d... Thin piece, 22e... Folding surface, 22f... Division, 22h, 22i... Cutting edge, 22k, 22m, 22s... Narrow edge, 221... Vertical slit, 22n ...Central section, 22o...Bending section, 22q...Edge strip, 22r, 22r ¹ ...Joining web, 22t...
Lock protrusion, 22y...core wire, 34...plastic body, 34a...dovetail key, 34b...shoulder, 3
4c...Exit opening, 34f...Centering groove, 34g...
...Through hole, 34h...Recess, 35, 36...Tightening body, 35a, 35f...Support, 35b... Center plate, 35c... Locking tongue piece, 35d... Penetration slit, 35e, 36e ... centering groove, 36a ... retaining grip, 36b ... receiving slit, 36c ...
...Support part, B...Flat strip, e-e...Folding plane, m-m...Contact pin plane, n-
n...plane, Rv, Rh...row, z-z...symmetrical plane.

Claims (1)

Claims: 1. Comprising a plastic body 34, a positioning body consisting of upper and lower clamping bodies 35, 36, and an identical metal contact element 22 formed from a sheet metal stamping. are arranged in parallel in the through-hole 34g of the plastic body, and are supported by the plastic body and each provided with a vertical slit in order to absorb the axial cutting resistance that occurs during contact connection. In a contact body for a cable connection device for simultaneously contacting coated cable cores 20y which are fixed parallel to each other at a distance in a positioning body, the contact element 22 has a contact knife 22a. It consists of a lamella folded by 180° forming a bent edge 22c in a plane of symmetry z-z perpendicular to the contact element axis, defined by the fold plane 22e of this folded lamina. Lamina sections 22 touching each other in the folding plane e-e
f constitutes a contact pin 22b, and the central section 22n of the folded lamina extends in the longitudinal direction along the contact pin plane m-m, which passes approximately through the contact pin axis perpendicular to the folding plane e-e. It is divided by a notch, and one of the divided strips of the divided central section is bent out through the bending section 22o so as to be positioned symmetrically with respect to the folding plane at mutual intervals. the contact knife 22a, and the other dividing strip is retracted with respect to the contact knife and forms an abutment edge 22h that abuts against the clamping body 35 on the lower side of the positioning body; Contact for a cable connection device for simultaneous contacting of coated cable cores, characterized in that the knife 22a has an abutment edge 22i which is supported in a recess 34h of the plastic body. body. 2. The abutting edge 22h formed by the breaking edge of the target breaking point is located in the same plane as the end face of the plastic body 34 and can be supported by the lower clamping body 35. The contact body according to item 1. 3. Claims in which the contact elements in the through holes 34g of one row (Rv) are fixed mirror-symmetrically to the contact elements 22 of the other row (Rh) using the locking protrusions 22t. The contact body according to item 1 or 2. 4. The contact knife 22a passes through the upper and lower clamping bodies 35, 36 forming the positioning body and is parallel to each other by the centering grooves 35e, 36e at the joint between the upper and lower clamping bodies 35, 36. A contact body according to any one of claims 1 to 3, which is adapted to be contact-connected to a core wire 20y of a cable fixed to. 5 Narrow edge 22s of contact if 22a shifted laterally with respect to contact pin plane m-m
are located approximately flush with the adjacent side edges of the plastic body 34 at the left end of one row (Rv) and at the right end of the other row (Rh);
Narrow edge 22 of the last contact element located at the respective other end of each row (Rv, Rh)
The contact body according to any one of claims 2 to 4, wherein k is provided at a distance from adjacent side edges. 6 with a plastic body 34, a positioning body consisting of upper and lower clamping bodies 35, 36, and a contact element 22 made of the same metal, molded from a sheet metal stamping, which contacts the through-hole in the plastic body. It has a pair of identical contact knives 22a arranged in parallel within 34g and supported by a plastic body and each provided with a longitudinal slit in order to absorb the axial cutting resistance that occurs during the contact connection. In the method for manufacturing a contact body for a cable connection device for simultaneous contact connection to coated cable cores 20y fixed in parallel at mutual intervals in a positioning body, a contact element having a contact knife is formed. In order to do this, a sheet metal strip is punched out so that the plane of symmetry z-z extends parallel to the longitudinal direction of the sheet metal strip, except for the area (knife area) in which the sheet metal 22d is defined to form the contact knife 22a. forming a double-sided symmetrical flake strip B laterally surrounded on both sides by edge strips 22q, 22q ¹ , which are separated from each other by the knife region; After bending out of the plane of the foil strip B through one bending section 22o in each case to form a contact knife lying parallel to this plane and then cutting off one edge strip 22q ¹ the lamella strip B is folded over 180° in the plane of symmetry z-z to form a contact pin and then connected to one another by the other edge strip 22q to form a contact strip. Contact body for a cable connection device for simultaneous contact connection to a coated cable core, characterized in that the element is simultaneously inserted into a through hole 34g of a plastic body 34 and this edge strip 22q is severed. manufacturing method. 7. At the same time, the contact elements 22 in the form of a strip, which are fed out by rollers, are inserted into at least one row (Rv or Rh) of the through holes 34g of the plastic body 34, and then the connecting web 22r is inserted at its target breaking point. 7. A method as claimed in claim 6, characterized in that the plastic body 34 is briefly pivoted relative to the contact element strip about an axis extending parallel to the longitudinal axis of the plastic until it is broken off.