EP3309904A1 - Housing for connecting at least one cable end of a cable - Google Patents

Abstract

Housing for connecting at least one cable strand (8) of a cable (7) to a connection pad (6) of an electrical contact, wherein a housing (2) has a holder (9) with at least one housing part (2) having a bottom (3) and side walls (4) Holding portion (10) for fixing the supplied from outside the housing (1) cable (7) is provided, which is arranged in the region of a side wall (4) of the housing part (2), a holding portion adjacent to the mounting and (9) and upwardly open cable guide (15), in which the cable strand (8) is accommodated or received, and a directly to the cable guide (15) adjacent terminal pad (6) to which the cable strand (8) is connected or connectable via a connection connection.

Description

The invention relates to a housing for connecting at least one cable strand of a cable to a connection pad of an electrical contact.

In such a housing are usually one or more electronic components that serve to perform a variety of tasks. It can be z. B. be a measuring electronics or control electronics. Usually, a cable comprising one or more cable strands or several cables are guided with corresponding cable strands in the housing, and are there with corresponding connection pads, for example, on a board, which carries corresponding electronic components, connected. The connection, which is usually done by manual soldering, however, is relatively difficult in known housings. Often the cable strand must be passed through a corresponding hole in the board, which is provided on the connection pad, so be pushed through, after which it is first soldered. Often it is also necessary to provide additional components for cable positioning and guidance, such as a spout or an additional plastic part such as a plug or the like, to guide the cable or the strand according to the connection pad.

The invention is therefore based on the problem of providing a contrast improved housing that allows easier connection of a cable strand.

To solve this problem, the invention provides a housing for connecting at least one cable strand of a cable to a connection pad of an electrical contact, wherein a holder with at least one holding section for fixing the cable supplied from outside of the housing part is provided on a housing component having a bottom and side walls, which is arranged in the region of a side wall of the housing, a cable section adjacent to the holding section and open towards the holder, in which the cable strand is to be accommodated or received, and a connection pad adjacent to the cable guide, where the cable strand is connected or connectable via a connection.

The housing according to the invention allows for easy connection of a cable strand. The supplied from outside the housing cable, usually consisting of an outer insulation in which one or more cable strands are embedded, is attached with its outer insulation in the holding portion of the holder, which is provided on the housing side wall, for example clipped. From the cable runs the cable strand, which means that the outer insulation is removed. Assigned to the holding section, positioned slightly spaced from it is a cable guide. This cable guide is on the one hand to the holder, on the other hand, open at the top, immediately adjacent to a terminal pad is positioned. During installation, the cable strand can now be introduced without difficulty into the cable guide which is open towards the holder and upwards; it can be inserted into the cable guide without effort from above. Since the cable guide is immediately adjacent the connection pad, there is the stripped cable strand, so the part of the cable strand to be connected directly with introduction into the cable guide in its connection position on the connection pad, so is on this. The connection pad is thus immediately adjacent and, seen in the longitudinal direction of the cable strand, almost behind the cable guide. When inserting consequently only the cable is introduced into the holding section, after which, if this does not already happen simultaneously, the cable strand is quasi inserted from above into the cable guide, so that it already rests in the connection position on the connection pad. In this position, it is held by itself because of their stability and the resulting restoring effect, that is, the slightly bent cable strand is with appropriate bias in the cable guide and is pressed against the connection pad or spring-loaded. After inserting the cable strand, this can then be soldered by hand without difficulty, since as described the connection portion of the cable strand is already in the correct connection position on the connection pad and a contact can be achieved via a simple soldering.

The cable guide preferably has two guide sections receiving the cable strand between them, ie two web-like guide sections, so that a channel open for holding and upwardly into which the cable strand is inserted from above is formed. The guide sections are preferably substantially vertical to the bottom of the housing part, so almost parallel to the opposite side wall to which the cable is fixed to the bracket. It is obvious that the cable strand must necessarily be bent by an angle> 90 ° and guided to the connection pad, after the cable in the mounting position vertically in the direction of the ground is guided and the cable strand then along the floor and again bent slightly upwards into the cable guide and the connection pad runs. This results in the already described slight bias with which the cable strand rests securely on the connection pad.

The connection pad itself is preferably provided on a printed circuit board which has an edge recess for receiving the cable strand on the connection pad. This edge recess, which is, for example, C-shaped, is open towards the cable guide, thus closing against the channel formed via the cable guide. The cable strand is accommodated in this open, C-shaped recess, and fixed, which further simplifies the subsequent soldering process, since the solder joint can be obtained in this strand region engaging in the edge recess, where there is a very good connection to the connection pad, ie the contact metallization , lets reach.

The mounting portion, on which the cable is fixed in the region of the side wall, is preferably designed as a C-shaped cable guide which is open towards the cable guide, which allows a simple clipping or pressing in of the cable. For example, the cable clamp can be designed as a three-point clamp in which the cable is fixed.

As described, in the assembly position, the cable preferably runs essentially perpendicular to the floor through the holding section, after which the cable strand runs at an angle of> 90 ° to the cable guide. This offers the advantage of self-supporting positioning of the cable strand on the connection pad, as already described above.

Preferably, the holder may have a plurality of holding sections for fixing a plurality of cables, wherein each holding section is associated with at least one cable guide adjacent. This makes it possible to fix several cables to a common holder, wherein each holding section is at least one cable guide adjacent to an associated terminal pad.

Of course, one or more holding sections may also be arranged adjacent to a plurality of guide sections for receiving one cable strand each. As already described, a cable can also comprise a plurality of cable strands which are to be contacted. Each individual strand is accommodated in accordance with this embodiment of the invention in a separate guide section assigned to the holding section and guided to a corresponding connection pad. Again, the assembly is very simple, as the individual Cable strands only need to be inserted into the cable guides that are open towards the bracket and upwards.

The holder itself may be a separate component, for example made of plastic, which is fastened to the housing part via a clamping, latching, adhesive or welded connection. For example, the holder, a simple plastic injection-molded component, be latched or clamped in corresponding latching receptacles on the housing component, which greatly simplifies the assembly. Gluing over a suitable adhesive bond is conceivable, as well as when using correspondingly similar materials of support and plastic component a welded joint, so either a plastic or a metal weld.

The pad or pads are arranged as described on a circuit board. A particularly expedient development of the invention also provides for arranging the cable guide on the circuit board having the connection pad or pads, so that the cable guide is simultaneously mounted and correctly positioned with the assembly of the circuit board. The arrangement of the cable guide to the circuit board is particularly useful because it is as described immediately adjacent to the connection pad and must necessarily be aligned correctly relative to the connection pad, so that by inserting the cable strand in the cable guide and the cable strand is automatically applied to the connection pad.

The cable guide can for this purpose be formed integrally with the circuit board, which is readily possible, since the circuit board itself is usually a component based on plastic, that is, consists of a synthetic resin matrix. It is readily possible to form the corresponding geometry of the cable guide in the manufacture of the circuit board, so when pressing.

Alternatively, it is conceivable that the cable guide is a separate component, for example also made of plastic, which is connected via a clamping, latching, adhesive or welded connection to the circuit board. It is also conceivable here aufzustecken the edge of the cable running as a simple plastic injection molded cable management component or on the circuit board, so that a secure fixation is given. The cable guide component comprising a plurality of individual cable guides or elongated guide sections is designed quasi in the manner of a "rake", wherein the guide portions are all arranged on a common connecting web, from where they protrude.

Finally, it can be provided that either the housing part can be closed or closed by means of a cover part, or that the side walls terminate above the plane of the connection pad or pads, in particular the circuit board, and the housing part can be cast or cast with a potting compound. If the housing is in two parts, it can be closed by means of a separate cover part to be exposed on the housing part and firmly connected to it. Alternatively, the side walls can also be pulled up so high and above the plane of the connection pads or the printed circuit board that the housing part can be potted with a potting compound. As with the two-part design, all components relevant to cable handling are provided on the housing part on a side wall or bottom side, respectively. The cable handling and the PCB fixing takes place solely on this housing part. Therefore, it is easily possible to shed the housing part after connecting the cable or cables.

Fig. 1

eine Teilansicht eines erfindungsgemäßen Gehäuses mit perspektivischer Darstellung des unteren Gehäuseteils mit eingesetzter Platine und einem verlegten Kabel,

Fig. 2

eine Aufsicht auf die Anordnung aus Fig. 2,

Fig. 3

eine Schnittansicht in Richtung der Linie III - III aus Fig. 2, und

Fig. 4

eine Prinzipdarstellung eines erfindungsgemäßen Gehäuses einer zweiten Ausführungsform.

Further advantages and details of the invention will become apparent from the embodiment described below and with reference to the drawings. Showing:

Fig. 1

a partial view of a housing according to the invention with a perspective view of the lower housing part with inserted board and a laid cable,

Fig. 2

a view of the arrangement Fig. 2 .

Fig. 3

a sectional view in the direction of the line III - III off Fig. 2 , and

Fig. 4

a schematic diagram of a housing according to the invention a second embodiment.

Fig. 1 shows a partial view of a housing 1 according to the invention, comprising a shown lower housing part 2 and an unspecified upper housing part 2, which are placed on each other for enclosing the housing interior. The connection of the two housing parts may be such that a sealed connection results, thus the housing is sealed against the ingress of moisture, but this is not mandatory. This depends on the electronics installed on the housing side and the intended use or location.

The housing part 2 comprises a bottom 3 and a plurality of side walls 4, two of which are shown in the example shown. At the bottom 3 attached respectively fastened there is a printed circuit board 5 having a plurality of individual connection pads 6, so Kontaktmetallisierungsabschnitten to which a cable strand of an externally supplied cable is to be connected.

Shown is a cable 7, which leads in the example shown, a cable strand 8, which is to be attached to a connection pad 6 and to be soldered thereto. In order to fix the cable 7, which is supplied from outside the housing 1, a holder 9 is provided which has a plurality of C-shaped holding portions 10, which are open to the housing interior. Each C-shaped holding portion is designed as a three-point holder, that is, the cable 7 rests with its outer insulation at three points 11 and is fixed in the holding portion 10 by clamping.

In particular Fig. 3 shows, the cable 7, which is fixed by a corresponding clamping portion 12 at the upper edge of the side wall 4, bent over virtually 90 ° along the side wall 4 down, from where the cable strand 8 continues to run.

The holder 9 is fixed, for example via suitable locking elements 13 at corresponding latching portions 14 on the side wall 4. The holder 9 is, for example, a simple plastic injection-molded part, so that the corresponding latching sections 13 can be readily formed. Also, the assembly is easy because the holder 9 is only to be engaged in the locking portions 14.

As Fig. 3 clearly shows, the cable strand runs 8 bent along the bottom 2 to the circuit board 5 respectively to the local terminal pad 6. To safely guide the cable strand 8 in this way and bring to the connection pad 6 and to position this correctly, each terminal pad 6 is a cable guide 15 assigned. Each cable guide 15 is, see Fig. 1 , of two elongated guide portions 16, which extend substantially vertically to the bottom 3. The web-like guide portions 16 receive the cable strand 8 between them, as in FIG Fig. 2 is clearly visible. Two adjacent guide sections each form a cable guide.

As the Figures 1 and 2 clearly show, the cable guides 15 are open to the C-shaped holding portions 10, they are also open at the top, that is, the cable strand 8 can be inserted from above between the two guide portions. This insertion is very easy, because, see Fig. 3 , the cable strand 8 is inevitably umzubiegen by more than 90 °. In this case, a restoring force of the cable strand 8 having a certain rigidity, which makes it possible for the cable strand 8 to be formed manually "snap" easily between two guide portions 16, the cable strand 8 springs quasi this case by itself between the guide sections.

The guide portions 16 are preferably formed directly on the circuit board 5, that is designed in one piece with this. Alternatively, the guide portions 16 may also be part of a separate, one-piece plastic component, they are then connected to each other via a common connecting web, from which connecting web they protrude. Overall, the arrangement of the guide sections forms a kind of "rake".

In particular Fig. 2 shows, the respective terminal pad 6 is immediately adjacent to the respective cable guide 15, ie immediately adjacent to the space between two guide sections. Each terminal pad 6 has, formed on the board 5, a substantially C-shaped edge recess 17. In this edge recess 17, the cable strand 8 engages with the stripped strand section 18 a. Since the connection pad 6, that is to say the metal contact, extends directly to the edge recess 17, consequently the strand section 18 is already positioned exactly relative to the connection pad 6 and is already in contact therewith. It is then readily possible to produce the corresponding solder joint in the region of the edge recess 17 and the contact between the strand section 18 and the connection pad 6.

In particular Fig. 2 shows, in the embodiment shown a holding portion 10 usually two or more cable guides 15 associated with, as well as a corresponding number of connection pads. This is because often a cable 7 several separate cable leads 8 leads, which are to be contacted separately. The specific layout of the printed circuit board 5 and the connection pads 6 and thus also the cable guides 15 and the plurality of elongated, web-like guide portions 16 depends on the assembled electronics and the number of cables to be supplied 7 respectively 8 strands.

Fig. 4 Finally, shows a further embodiment of a housing according to the invention 1. This comprises only a housing part 2 with bottom 3 and four side walls 4, wherein on a side wall 4, the holding geometries for fixing one or more cables, as in the in the Fig. 1-3 described example, are provided. Shown is a printed circuit board 5, which is fixed on a suitable holder 19, and by way of example a cable 7 together with cable strand 8, which is contacted on the circuit board 5.

The side walls 4 terminate above the plane of the printed circuit board 5, the cable also runs above it and then dives into the interior. As a result of high side walls can be encapsulated here, the housing part 2 with a potting compound 20 in which all located in the housing part 2 components are embedded. A lid is not provided here.

LIST OF REFERENCE NUMBERS

1

casing

2

housing part

3

ground

4

Side wall

5

circuit board

6

contact pad

7

electric wire

8th

cable strand

9

bracket

10

holding section

11

Point

12

clamping section

13

locking element

14

Side wall

15

cable management

16

guide section

17

edge recess

18

Litzenabschnitt

19

bracket

20

potting compound

Claims (12)

Housing for connecting at least one cable strand (8) of a cable (7) to a connection pad (6) of an electrical contact, wherein a housing (2) has a holder (9) with at least one housing part (2) having a bottom (3) and side walls (4) Holding portion (10) for fixing of the outside of the housing (1) supplied cable (7) is provided, which is arranged in the region of a side wall (4) of the housing part (2), a holding portion adjacent and arranged for mounting (9) and upwardly open cable guide (15), in which the cable strand (8) is receivable or received, and a directly to the cable guide (15) adjacent terminal pad (6) to which the cable strand (8) is connected or connectable via a connection connection. Housing according to claim 1, characterized in that the cable guide (15) comprises two cable strand which (8) between them receiving elongate guide portions (16). Housing according to claim 2, characterized in that the guide sections (16) are substantially vertical to the bottom (3) of the housing component (2). Housing according to one of the preceding claims, characterized in that the connection pad (6) on a printed circuit board (5) is provided which on the connection pad (6) has an edge recess (17) for receiving the cable strand (8). Housing according to one of the preceding claims, characterized in that the holding portion (10) is formed as C-shaped and the cable guide (15) open towards the cable clamp. Housing according to one of the preceding claims, characterized in that the cable (7) runs substantially perpendicular to the bottom (3) through the holding portion (10) and the cable strand (8) bent by an angle> 90 ° to the cable guide (15) , Housing according to one of the preceding claims, characterized in that the holder (9) has a plurality of holding sections (10) for fixing a plurality of cables (7), wherein each holding section (10) at least one cable guide (15) is adjacent. Housing according to one of the preceding claims, characterized in that one or each holding portion (10) a plurality of cable guides (15) are arranged adjacent to each for receiving a cable strand (8). Housing according to one of the preceding claims, characterized in that the holder (9) is a separate component, which is fastened via a clamping, latching, adhesive or welded connection to the housing part (2). Housing according to one of the preceding claims, characterized in that the cable guide (15) on a or the connection pads (6) having printed circuit board (5) is arranged. Housing according to claim 10, characterized in that the cable guide (15) is formed integrally with the printed circuit board (5), or that the cable guide (15) is a separate component, which via a clamping, latching, glued or welded connection with the circuit board (5) is connected. Housing according to one of the preceding claims, characterized in that the housing part (2) can be closed or closed by a cover part, or in that the side walls (4) above the plane of the or the connection pads (6), in particular the circuit board (5) ends and the housing part (2) can be cast or cast with a potting compound (20).

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