CN101517841A - Device for a plug-free electrical connection with strain relief - Google Patents

Abstract

The invention relates to a device (1) having a wall (4), a first contact means (2), a second contact means (3) and an electrical lead (6), wherein the first contact means (2) is arranged in such a way that it forms an electrically conductive connection through the wall (4). The second contact means (3) is arranged on the first contact means (2) in such a way that an electrical contact connection (2, 3) is formed. The electrical lead (6) is electrically conductively connected to the second contact means (3). The core of the invention is that a locking device is provided, by means of which the electrical lead (6) is fixed to the wall (4).

Description

Devices having a plug-free electrical connection relieved of tension

technical field

The invention relates to a device having a wall, a first contact means, a second contact means and an electrical lead, wherein the first contact means is arranged in such a way that it passes through the wall to form an electrically conductive connect. In this case, the second contact means is arranged on the first contact means such that an electrical contact connection is formed. The electrical lead is electrically conductively connected to the second contact means.

Background technique

The electrical contact connection is often formed by a plug and a counter-plug, on which plugs a first contact means and a second contact means are arranged. In this case, the plug and the counter-plug facilitate the matching arrangement of the first and second contact means and facilitate assembly and disassembly in the case of a detachable electrical connection. Typically, the plug and counter plug are mechanically connected, while the contact mechanism is designed for an optimal electrical connection. Electrical contact connections that are exposed to harsh environmental influences (for example in the open air, in wet rooms or in motor vehicles) are usually implemented by means of sealed plugs. Such sealed plugs (such as acceleration sensors, pressure sensors or rotational speed sensors in motor vehicles) are usually sealed against the surroundings by a single-core seal in the transition region between an electrical lead and its cable end. Furthermore, the plug region is usually sealed off from the sensor housing by a second sealing element. For tension relief, for example, the plug has a locking device in the inner sealing area. This is usually achieved in that the cable lug at the end of the electrical conductor is mechanically connected via a mechanical latch to the plug housing surrounding the cable lug. However, the plug and the counter-plug have the disadvantage that they have a certain overall size, which often greatly exceeds the overall size of the associated contact means.

A housing with an electrical component, an electrical lead and an electrical connection is known from the non-prepublished German application DE 10 2005 042 491 . Here, the housing is devoid of external plugs and counter-plugs.

Contents of the invention

The invention relates to a device having a wall, a first contact means, a second contact means and an electrical lead, wherein the first contact means is arranged in such a way that it passes through the wall to form an electrically conductive connection . In this case, the second contact means is arranged on the first contact means such that an electrical contact connection is formed. The electrical lead is electrically conductively connected to the second contact means. The essence of the invention is that a locking device is provided, by means of which the electrical lead is fastened to the wall. Advantageously, this results in a plug-free electrical contact connection which is mechanically fixed by means of the locking device. This in particular relieves the electrical leads and thus the electrical contact connections from tension. It is advantageous if the locking device is designed to be detachable.

An advantageous embodiment of the invention comprises that an introduction unit is arranged on the wall, in which introduction unit the second contact means is at least partially arranged and/or the electrical lead is at least partially arranged. It is thus advantageous when the first and second contact means are arranged to fit one another during assembly. Furthermore, it is advantageous that bending or shearing stresses on the contact means and the electrical leads by external mechanical influences can be avoided.

An advantageous refinement of the invention provides that the locking device is arranged on the introduction unit. Advantageously, an operative connection between the electrical lead-in and the wall is thereby achieved in a simple manner by means of the lead-in unit.

An advantageous refinement of the invention provides that the electrical contact connections can be formed separately.

A particularly advantageous embodiment of the invention provides that a seal is arranged between the introduction unit and the electrical lead. As a result, the contact means are advantageously protected against environmental influences. This results in a device with a plug-free, electrical, mechanical and sealed connection.

It is also particularly advantageous if the sealing device has a sheathing unit. A particularly effective mechanical connection is thus advantageously achieved between the electrical lead and the lead-in unit.

An advantageous refinement of the invention also provides that the locking device is mechanically operatively connected to the electrical lead by means of the sealing device. It is also advantageous if the wall is part of a housing which is in particular closed. It is also advantageous if at least one assembly means is provided on the device, which is suitable for connecting the device to a support device. It is advantageous if the mounting means is designed as a web, which is in particular connected in one piece to the housing.

Advantageously, in an embodiment of the device according to the invention, a tension-relieving, plug-free, sealed contact connection is realized. As a result, the small housing containing the electrical components can be provided with electrical feedthroughs particularly advantageously. Here, the design is very compact and can withstand various environmental influences. The invention can therefore be used particularly advantageously in housings with micromechanical sensors in motor vehicles.

Further advantageous configurations emerge from the subclaims.

Description of drawings

An exemplary embodiment of the invention is shown in the drawing and is explained in more detail in the following description.

FIG. 1 schematically shows a housing with electrical components and electrical leads in the prior art not disclosed in advance,

FIG. 2 schematically shows an embodiment of an inventive, tension-relieving, plug-free electrical connection,

FIG. 3 schematically shows an embodiment of the inventive locking device for electrical leads,

FIG. 4 schematically shows a seal for a further embodiment of the device according to the invention, which seal has a sheathing unit for the electrical leads.

Detailed ways

The invention is described in detail with the aid of the embodiments described below.

)5中。在导入单元5和电引线6之间设置一个密封件7，该密封件使接触机构2、3相对周围环境密封。最后，该壳体具有一个连接板形式的装配机构10，该连接板适合于将壳体拧紧在一个外部的支撑装置上。FIG. 1 schematically shows a housing with electrical components and electrical leads in the prior art which is not disclosed in advance. German application DE 10 2005 042 491 , which has not been published beforehand, discloses a housing with an electrical component, an electrical lead and an electrical connection. In this case, the housing has no external plug and no counter plug. The device is described here in a partial manner. A housing with a wall 4 , a first contact means 2 , a second contact means 3 and an electrical lead 6 is shown in a partial section. The first contact means 2 pass through the wall 4 and thus form an electrically conductive connection through said wall 4 . The second contact means 3 is arranged on the first contact means 2 in an electrically conductive manner, whereby an electrical contact connection 2 , 3 is formed. The electrical lead 6 is electrically conductively connected to the second contact means 3 . This produces an electrically conductive connection from the electrical lead 6 through the wall 4 to the first contact means 2 . The electrical contact connections 2 , 3 are designed to be separable. The second contact mechanism 3 and part of the electric leads 6 are arranged in an introduction unit (

)5. A seal 7 is arranged between the introduction unit 5 and the electrical lead 6 , which seals the contact means 2 , 3 from the environment. Finally, the housing has a mounting means 10 in the form of a web, which is suitable for screwing the housing to an external support.

FIG. 2 schematically shows a plug-free, tension-relieving electrical connection according to the invention. Like numerals denote like features as previously described in FIG. 1 . A device 1 with a wall 4 , a first contact means 2 , a second contact means 3 and an electrical lead 6 is shown here in a partial section. The elements described are arranged as described in FIG. 1 . According to the invention, a locking device 8 for fastening the electrical lead 6 to the wall 4 is now additionally provided. In this exemplary embodiment, the locking device 8 is inserted into the introduction unit 5 . The locking device 8 partially surrounds the electrical lead 6 . The seal 7 surrounds the electrical lead 6 , which can be a single-core wire, for example, and relieves the contact connections 2 , 3 of any tensile load in the direction 11 by abutting or abutting against the locking device 8 . To this end, the seal 7 has an armor unit 9 , whereby it is mechanically reinforced.

In a further embodiment not shown, the seal 7 has no sheathing elements. In a further embodiment not shown, the electrical lead 6 has no seal. In one such embodiment, the locking device 8 can be mechanically connected to the lead 6 itself or to the contact means 13 in order to achieve the above-mentioned tension relief in the direction 11 . In another embodiment not shown, no introduction unit 5 is provided, but the locking device 8 is directly connected to the wall 4 .

The device shown in FIG. 2 can be used as a housing, in particular in a motor vehicle, with electrical leads for electrical components. The housing can be, for example, a sensor housing. In this case, the device 1 according to the invention is designed such that, during assembly, the electrical lead 6 with the second contact means 3 and a special single-core seal is plugged directly into the introduction unit 5 of the housing with the wall 4 . The locking device 8 preassembled on the insertion unit 5 is then closed, which can be effected, for example, by means of a snap connection in a form-fitting manner or also in a force-fitting manner.

A suitable locking device 8 for two single-core electrical leads 6 is shown in FIG. 3 . FIG. 3 shows a locking device 8 , in this example for two respectively single-core electrical leads 6 . As shown in this partial sectional view, a seal 7 with a sheathing unit 9 is arranged around the electrical leads 6 in each case.

The latching of the locking device 8 in the insertion unit 5 ensures that the second contact member 3 (a cable lug in this example) is in the correct position relative to the first contact member 2 (here a contact pin) And the sensor housing is sealed and tension relieved.

To this end, FIG. 4 schematically shows a seal with sheathing elements for the electrical leads of a further variant of the device according to the invention. The longitudinal section shows the electrical lead 6 and a seal in the form of a single-core seal. This single-core seal consists of an armor unit 9 in the form of a metal jacket whose inner and outer regions are coated with a seal 9 in the form of a sealing plastic. The inner and outer geometry of the plastic ensures that no environmental influences penetrate into the inner region of the sensor. The single-core seal has direct mechanical contact with the cable termination and the locking device 8 . The single core seal thus achieves the desired tension relief in direction 11 . The locking device 8 is preferably designed in such a way that, in the preassembled state, the electrical lead 6 with the single core seal can be inserted into the sensor housing and the preassembled locking device 8 can then be inserted into it. In the final position, in particular it snaps into a form-locking connection.

Claims (10)

1, a kind of device (1) with a wall (4), first contact mechanism (2), second contact mechanism (3) and electrical lead (6),

Wherein, this first contact mechanism (2) is provided with in this wise, and make this first contact mechanism pass described wall (4) and form a conductive connection,

Wherein, second contact mechanism (3) is arranged on first contact mechanism (2), makes that forming one electrically contacts connection (2,3),

Wherein, this electrical lead (6) is connected conductively with second contact mechanism (3),

It is characterized in that,

Be provided with a locking system (8), electrical lead (6) is fixed on the described wall (4) by this locking system.

According to the device of claim 1, it is characterized in that 2, this locking system (8) releasably constitutes.

3, according to the device of claim 1 or 2, it is characterized in that, be provided with one and import unit (5) on described wall (4), second contact mechanism (3) is at least partially disposed in this importing unit and/or electrical lead (6) is at least partially disposed in this importing unit.

According to the device of claim 3, it is characterized in that 4, this locking system (8) is arranged on this importing unit (5).

5, according to each device in the above claim, it is characterized in that this electrically contacts connection (2,3) and releasably constitutes.

6, according to each device in the above claim, it is characterized in that, a sealing device (7) is set importing between unit (5) and the electrical lead (6).

According to the device of claim 6, it is characterized in that 7, sealing device (7) has an armouring unit (9).

According to the device of claim 6 or 7, it is characterized in that 8, this locking system (8) mechanically acts on electrical lead (6) by means of sealing device (7) and being connected.

9, according to each device in the above claim, it is characterized in that this wall (4) is the part of a housing, this housing particularly seals.

10, according to each device in the above claim, it is characterized in that at least one assemble mechanism (10) is set, and this assemble mechanism is suitable for making this device to be connected with bracing or strutting arrangement on this device.

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