SK8872003A3 - Electric plug-type connector - Google Patents

Abstract

The invention relates to an electric plug-type connector (1) provided with a housing that comprises at least two parts (2, 3), whereby the first part (2) serves to accommodate plug pins or contact tubes and the second part (3) forms a protective covering that surrounds the contacting of the plug pins to the connecting leads, and radially protruding ribs (7) are provided on one of both parts (2). Said ribs, together with corresponding fillets (9) located on the other of the two parts (3), effect an axial fixing of both parts (2, 3) once both parts (2, 3) are turned with regard to one another. A spring-like stopping means (12) is provided between both parts (2, 3) and enables a rotary fixing. In order to create an anti-rotation element that, on the one hand, is rugged and always effects the same securing even when repeatedly opened and closed and, in the event of being unintentionally damaged, can be easily replaced. To this end, the spring-like stopping means (12) has a clamping area (14), which is clamped on one of both parts (2) and has a spring area (16). This spring area connects to the clamping area (14) in an axial direction of the plug-type connector (1), can move in a radial direction, and can be engaged (8) in a corresponding, outwardly open and radially accessible recess (21) located on the other part (3).

Description

ELECTRIC PLUG

Technical field

The present invention relates to an electrical plug according to the preamble of claim 1.

BACKGROUND OF THE INVENTION

Such plugs are known, for example, from EP 0 921 605 A1. The two housing parts are connected to each other by means of a bayonet lock and thus secured axially and against rotation. The axial fixation is thereby made possible by ribs projecting radially from one of the two housing parts. The rotation security is achieved by a spring element which is formed as a continuation of one rib and which is inserted into a recess in the housing part. It appears disadvantageous here that the spring element, which is formed as one piece with the rib and therefore is made of the same material, wears out relatively quickly when it is opened and closed several times and, on the other hand, loses its elasticity and protrusion arranged on the spring element , which prevents the relative movement of the two housing parts in the locking position, is cut off very quickly, thereby not providing sufficient rotation security. If the spring element is worn with a protrusion, the whole plug is unusable and needs to be replaced. The reasons for the early wear of the spring element are the different requirements for the plug material and the spring element material. The plug material is not suitable for the production of flexible components with relatively high stress.

US 5,743,763 shows a similar plug with a stop spring element which causes rotational fixation. However, accessibility to the plug-in stop element is also problematic and the susceptibility to soiling is also a disadvantage.

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It is an object of the present invention to overcome these disadvantages and to provide a plug type of the type mentioned above which provides a rotary lock which is both robust and also ensures the same lock during multiple opening and closing operations and allows easy replacement in case of accidental destruction.

SUMMARY OF THE INVENTION

According to the invention, this is achieved by the features of claim 1.

By tensioning the spring element in the axial direction, when the two housing parts are rotated, there is no stress on the spring element to rupture. Thus, it is not possible to deflect the spring element. Separate placement of the spring element also permits the use of a material specially designed for the technique utilizing stops and spring elements as proposed in claim 3, which differ in respect of hydrolysis resistance and tensile strength of the rest of the plug. If, however, the spring element is destroyed, it can simply be replaced by a new spring element. Both parts of the plug housing can be further used.

The feature of claim 2 provides a reliable stop to prevent rotation.

The features of claim 4 and claim 5 make it possible to easily mount on both parts of the housing. The fastening encircles the spring element on three sides. This permits the transmission of large forces as well as guaranteed sufficient rotation protection in any case.

By means of the features of claim 6, the spring element is secured against falling out of the fastening.

By means of the features of claim 7, the spring element is securely and simply pushed radially inwardly, thereby resolving the rotation lock.

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BRIEF DESCRIPTION OF THE DRAWINGS

In the following, the plug according to the invention will be described in more detail with reference to the figures, in which:

Fig. 1 shows the electrical plug in the locked state, FIG. 2 is a partial sectional view of the electrical plug in the locked state of FIG. 3 shows detail A of FIG. 2 fig. 4 is a cross-sectional view of the electrical plug in the projection plane of the two housing parts, FIG. 5 shows detail B of FIG. 4 fig. 6 is a front view of the spring element of FIG. 7 shows a rear view of the spring element

DETAILED DESCRIPTION OF THE INVENTION

Figure 1 shows a plug 7 according to the invention with a first housing part 2 and a second housing part 3. The first housing part 2 serves to accommodate the fork pins (not shown) which are mountable in the plug channels provided for this purpose (FIG. 4). Alternatively, the first housing part 2 may also serve to secure the socket receptacles. The term plug includes both plug (plug) and connection and socket. The first housing part 2 furthermore has a narrow flange section 5 which determines the degree of overlap when the housing parts 2 and 3 are joined. In the coupled state of the two housing parts 2, 3, they overlap each time in the overlap region 6 (first housing part 2) and in the overlap region 8 (second housing part 3). Radially projecting ribs 7 (FIG. 4) are located in the overlap region 6 of the first housing part 2.

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The second housing part 3 serves for lining the contacts of the plug pin or socket receptacles with the electrical connection lines. In the overlap region 8, which is designed to overlap the overlap region 6 of the first housing part 2, there are grooves or recesses 21, which serve both for easy removal of the injection molded part and for opening the counter-rotation lock, as later as still precisely. performed. On the inside of the overlap region 8 are located radially inwardly extending transition bridges 9 which cooperate with the ribs 7 of the first housing part 2 and thus allow axial fixation. It will be appreciated that the ribs 7 may also be located on the second housing part 3 and the transition bridges 9 on the first housing part 2.

In addition, the first housing part 2 has two transition bridges 10 which are substantially L-shaped in cross-section, extend in the axial direction of the plug 1 and together with the housing of the first housing part 2 define a recess 11. A spring element 12 is inserted into this recess 11. which has a protrusion 13 oriented outwards. The spring element 12 is displaceable in the axial direction (from the top in FIG. 2) into the recess 11, while at the same time being fastened in the recess 11 by means of a press fit. The press fit is sufficiently strong that and in the upper region in the radial direction of the plug 7 can spring. The region 14 of the spring element 12 is in this case clamped between the arm 15 of the L-shaped intermediate bridge 10 extending in the circumferential direction of the first housing part 2 and the housing of the first housing part 2, the second region 16 being located between the two arms 15.

The spring element 12 is made of a plastic specially suited for a technique using stops and resilient elements which differs from the plug material in terms of its physical properties. In principle, it is also possible to use metal spring plates as spring element or other spring materials with good spring properties with sufficient strength. The spring element 12 has, as already mentioned, a toothed protrusion 13 which, in the state of assembly of the two housing parts 2, 3, causes a locking against rotation. The protrusion 13 is provided with a taper 13a having a recess 13b.

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The plug works as follows:

The two housing parts 2, 3 are pushed together in the axial direction, so that the overlap region 8 surrounds the overlap region 6. The flange section 5 serves as a limitation of the axial insertion into each other. The transition bridges 9 projecting from the overhang region 8 of the second housing part 3 inwardly allow the two housing parts 2, 3 to be axially slid into each other only in one defined position.

After the two housing parts 2, 3 have been inserted into each other, they rotate with respect to each other, the junction 9 allowing rotation in only one direction. As a result, the ribs 7 and the transition bridges 9 are aligned relative to each other, so that axial movement of the two housing parts 2, 3 is no longer possible. In tension in rotation in the preset direction, the spring element 12 is pushed in its upper, free spring area by means of a jumper 17 in the housing direction of the first housing part 2. After the spring element 12 has pushed the transition bridge 17 in rotation, it jumps radially outwards into the recess 21 due to spring action. In this case, the projection 13 is supported by its front side on the bridge 17. Rotation in the direction of the transition bridge 17 is no longer possible. Reversing in the opposite direction due to the gangway 9a is not possible because it will meet the rib 7a at the front.

The jumper 17 is guided in such a way that it extends obliquely inwards so that it slowly pushes inwards during the rotation of the spring element 12.

In order to release the anti-rotation lock, it is only necessary to push the spring element 12 with a pointed object through the recess 21 inwards. In this case, the pointed object is mounted on the lead-in bevel 13b and slides thereafter into the recess 13a, where it encounters a fixed stop and pushes the spring element radially inwardly. At the same time, the first housing part 2 must be rotated in the direction of the gangway 17.

Claims (7)

PATENT CLAIMS An electrical plug (1) with a housing comprising at least two parts (2, 3), the first part (2) serving to locate the fork pins or receptacle sockets and the second part (3) forming a protective sheath surrounding the contact of the fork pins or sockets the sockets with the connecting lines and on the first (2) of the two parts are radially projecting ribs (7) which, with corresponding transition bridges (9) on the second (3) of the two parts, cause axial fixation after the two parts (2, 3) of both parts (2, 3), wherein a stop means (12) between the two parts (2, 3) is provided which allows rotational fixation, characterized in that the elastic stop means (12) has a clamping area (14) which is clamped on the first (2) of both parts as well as in the radial direction a movable spring region (16) following in the axial direction of the plug (1) after the clamping region (14) which is insertable a radially accessible recess (21) on the second part (3). Electrical plug according to claim 1, characterized in that a projecting protrusion (13) extending radially outwardly is arranged on the spring zone (16). Electric plug (1) according to claims 1 and 2, characterized in that the spring element (12) is made of plastic suitable especially for the technique using stops and resilient elements. Electrical plug (1) according to one of Claims 1 to 3, characterized in that the spring element (12) can be inserted into a recess (11) projecting from the housing of the first housing part (2) in a direction parallel to the plug axis. 32155 / T Electrical plug (1) according to one of Claims 1 to 4, characterized in that the recess (11) is formed by two transition bridges (10) in substantially L-shaped cross section extending in the axial direction of the plug and the housing of the first housing parts (2). Electrical plug (1) according to one of Claims 1 to 5, characterized in that the recess (11) formed by the gangway (10) and the housing of the first housing part (2) and the spring element (12) have a press fit. Electrical plug (1) according to one of Claims 1 to 6, characterized in that the protrusion (13) oriented outwards is provided with a leading bevel (13b) in which the recess (13a) is provided.