Protective cover element and electrical plug-in connector

Abstract

To ensure the required finger contact protection in a simple and universally applicable manner in a case of an electrical plug-in connector having one or more contact blades protruding from an insulating material of a housing of a plug-in connector.SOLUTION: There are provided a protective cover element for plugging over a contact blade protruding from an insulating material of a blade contact of an electrical plug-in connector, and an electrical plug-in connector including at least one such protective cover element.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a protective cover element mounted on a contact blade of an electrical plug-in connector that protrudes from the insulating material of the connector housing, and to an electrical plug-in connector comprising at least one such protective cover element. [Background technology]

[0002] In electrical plug-in connection configurations, finger contact protection must be ensured to prevent accidents. For testing of finger contact protection, a standardized test finger is pressed against the edge of the opening of the housing component of the electrical plug-in connector with a specified force, or pushed inside, and it is tested that the conductive components do not come into contact with the test finger.

[0003] From DE102012105839A1, we can see a proposal to form a connector housing with a curved backing element that at least partially covers each blade contact of the electrical plug-in connector at the front. This ensures contact protection even when the plug-in devices are not plugged into each other. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] DE102012105839A1 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] The fundamental problem of the present invention is to ensure required finger contact protection in an electrical plug-in connector having one or more contact blades protruding from the insulating material of the plug-in connector housing, in a simple and universally applicable manner. [Means for solving the problem]

[0006] The problem is solved by a protective cover element mounted on the contact blade of a blade contact of an electrical push-in connector, wherein the contact blade has a length that protrudes from the insulating material of the connector housing of the push-in connector, the protective cover element has an insertion side which can push the protective cover element from the front of the contact blade along the surface of the contact blade, the protective cover element has at least one insulating protective element at the front, and when the protective cover element is mounted on the contact blade, the protective element covers at least partially the front of the contact blade in the insertion direction of the fork contact formed as the mating side of the blade contact, the protective cover element has a plurality of longitudinal pieces extending from the front protective element toward the insertion side, all of which are shorter than 75% of the length that the contact blade protrudes from the insulating material. Thus the protective cover element according to the present invention is formed to be relatively short in the insertion direction in which the mating connector can be inserted onto the electrical push-in connector, and therefore substantially covers only the area of ​​the front of the contact blade. This allows the protective cover element to be provided with reduced material consumption while still meeting the desired requirements for finger contact protection. The protective cover element may be formed such that, for example, all longitudinal pieces are shorter than 65% of the length to which the contact blades protrude from the insulating material. Thus, the protective cover element is located relatively far from the point where the contact blades protrude from the insulating material.

[0007] Here, the front of the contact blade refers to the side on which the mating fork contact is inserted into the contact blade in the insertion direction. The protective cover element may be formed as an independent component that can be fixed to the contact blade by engaging means, friction means, and / or integrating means. With the protective cover element according to the present invention, any electrical plug-in connector having a protruding contact blade can be retrofitted with the protective cover element, thereby satisfying the required finger contact protection. Therefore, the protective cover element according to the present invention is also suitable for retrofitting.

[0008] The protective cover element can be quickly and easily attached to the contact blade by simply pressing it, and is held to the contact blade based on a meshing connection and / or friction connection. Alternatively or in addition to this, fixation may be achieved by an integral connection between the contact blade and the protective cover element, for example by adhesive.

[0009] It is advantageous for the protective cover element to have multiple longitudinal pieces extending from the front protective element toward the insertion side. This allows the protective cover element to be mechanically robust, thereby absorbing forces without damage, particularly when it is placed over the contact blades. The longitudinal pieces may extend precisely in the insertion direction of a push-in connector having one or more fork contacts formed as mating sides, or they may extend at a certain angle with respect to the insertion direction. Gaps can be formed between the longitudinal pieces, which, when the protective cover element is mounted on the contact blades, expose the opposing contact areas of the contact blades on the opposing contact sides of the contact blades. This allows the fork contacts to electrically connect the mirror-symmetrically positioned contact forks to the contact areas of the contact blades exposed by the gaps when the protective cover element is mounted on the contact blades. When the contact blades are viewed from their front with the contact blades positioned vertically, the contact areas are located on the left and right sides of the contact blades, which is advantageous in this regard because the contact areas are each located at the same height. As a result, even though protective cover elements are mounted on the contact blades, a pair of fork contacts, arranged mirror-symmetrically with respect to the vertical when viewed in the direction of observation of the contact blades, can be electrically connected to the blade contacts. Such symmetrical fork contacts enable reliable electrical contact of the contact blades while also facilitating easy handling when inserting or disconnecting the plug-in connection.

[0010] According to one advantageous embodiment of the present invention, the longitudinal pieces (in other words, longitudinal ribs) have different lengths. This allows the longitudinal pieces to be optimized according to their different functions, for example, for a pure covering function of the contact blade and / or a fixing function for securing a protective cover element to the contact blade.

[0011] According to an advantageous embodiment of the present invention, a fixing element is provided on at least one of the longitudinal pieces, thereby enabling the protective cover element to be fixed to the locking element of the contact blade assigned as the mating side. This allows the protective cover element to be easily and quickly attached to the plug connector, even retrospectively. The protective cover element can be coupled, for example, in an interlocking manner with the locking element of the contact blade, and can be engaged with the locking element.

[0012] According to one advantageous embodiment of the present invention, the protective cover element has at least one intermediate piece (in other words, an intermediate rib) as a longitudinal piece, which extends from the front protective element toward the insertion side in the region between the opposing side edges of the contact blade. This further enhances the mechanical stability of the protective cover element. In addition, one or more such intermediate pieces can further improve contact prevention, which is particularly true for large contact blades.

[0013] According to one advantageous embodiment of the present invention, the protective cover element has a pair of intermediate pieces on the opposing contact sides of the contact blade. The pair of intermediate pieces can be arranged such that when the protective cover element is mounted on the contact blade, the opposing contact regions (contact windows) of the contact blade are exposed on the opposing contact sides of the contact blade, thereby enabling the fork contacts having mirror-symmetrically arranged contact forks to be electrically connected to the contact region when the protective cover element is mounted on the contact blade.

[0014] Such an intermediate piece divides each contact side of the covered contact blade into an additional contact area in the sense of a contact window. For example, it is advantageous for the longitudinal piece to create a number of contact windows equal to the number of contact fork pairs present in the fork contact for each contact side of the contact blade. If the fork contact is formed with two contact forks per contact side, it is advantageous to position one intermediate piece in the center between the upper and lower narrow side covers (in other words, elongated or narrow side covers) of the protective cover element.

[0015] According to one advantageous embodiment of the present invention, the pair of opposing intermediate pieces are interconnected by connecting pieces (in other words, connecting ribs). This mechanically stabilizes the protective cover element in the region of the intermediate pieces. In addition, this provides a robust fixing capability for securing the protective cover element to the contact blade.

[0016] Therefore, the connecting piece may have a fixing element for securing the protective cover element to the contact blade. In addition, at least one intermediate piece may form the longest longitudinal piece.

[0017] According to an advantageous embodiment of the present invention, the protective cover element has an upper narrow side cover and / or a lower narrow side cover as longitudinal pieces, these narrow side covers extending from the front protective element toward the insertion side, and covering at least the area of ​​each side edge of the contact blade when the protective cover element is mounted on the contact blade. This further increases the degree of coverage of the contact blade by the protective cover element, and therefore, further improved contact protection can be achieved, particularly when the upper and / or lower narrow side covers are formed from an insulator. In addition, the stability of the protective cover element is further enhanced.

[0018] According to an advantageous form of the invention, the upper and / or lower narrow side covers have a width greater than the insertion opening. In particular, the upper and / or lower narrow side covers can be made wider than the thickness of the contact blade. The upper and / or lower narrow side covers can, for example, have a U-shaped cross-sectional shape, whereby the respective side edges of the contact blade can be wrapped in a U-shape. Thereby, further improved contact protection can be achieved. In addition, the stability of the protective cover element is further increased.

[0019] According to an advantageous form of the invention, the protective cover element is formed so as to open on the insertion side without having a connecting part between the narrow side covers. Also by this, the protective cover element can be manufactured with very material savings.

[0020] Such a manner of opening on the insertion side of the protective cover element has an additional invention as listed in claim 13. It is advantageous that this invention can be combined with the forms described above and below.

[0021] According to an advantageous form of the invention, the protective cover element has a front piece (in other words, a front rib) as a front protective element, and this front piece has a length such that when the protective cover element is mounted on the contact blade, it extends substantially over the entire length of the front part of the contact blade. This has the advantage that with one protective cover element, the contact blade can be contact-protected over the entire range of its length direction at the front. In addition, this relatively long-formed front piece also contributes to the mechanical stability of the protective cover element.

[0022] According to one advantageous embodiment of the present invention, the front protective element has a thickness less than the thickness of the contact blade. This is advantageous for easily inserting the mating side of the contact blade, which is formed as a fork contact, onto the contact blade. That is, the front protective element is thinner (in other words, narrower) than the contact blade, so that the contact fork of the fork contact inserted onto the contact blade can directly make electrical and mechanical contact with the blade contact without having to be first diverted on the front protective element. Thus, the fork contact can be inserted onto the contact blade as usual, without any discomfort in feel or operation when inserting or removing the insert connection, thanks to the protective cover element positioned on the contact blade.

[0023] According to an advantageous embodiment of the present invention, the protective cover element is formed at an angle at the front. This further facilitates insertion of the mating side of the blade contact, i.e., the fork contact. The contact fork of the fork contact is additionally guided by the angled region of the protective cover element. The protective cover element may be formed at an angle with respect to a longitudinal axis and / or a transverse axis. In this regard, the longitudinal axis is the vertical line when the protective cover element is oriented in accordance with a contact blade whose front is oriented vertically. In this case, the transverse axis is the horizontal line extending perpendicular to the insertion direction.

[0024] The problem mentioned at the beginning is further solved by an electrical plug-in connector having a connector housing made of an insulating material and at least one bladed contact, wherein the bladed contact has a contact blade protruding from the insulating material, and the contact blade has a length that protrudes from the insulating material of the plug-in connector, and a protective cover element of the type described above is mounted on the contact blade and secured to the contact blade by engaging means, friction means, and / or integrating means. This protective cover element can be formed based on the advantageous form described above, in particular. Thus the advantages described above are achieved as well. The connector housing may be made entirely or partially of an insulating material, in which case the bladed contact is surrounded by the insulating material, at least where its contact blade protrudes from the material of the connector housing.

[0025] In one advantageous embodiment, the plug-in connector may have a housing formed with one or more accommodating chambers, into which the portion of the contact blades protruding from the insulating housing extends. For example, each accommodating chamber may be assigned to one contact blade, or multiple contact blades may be assigned to one accommodating chamber. Such accommodating chambers further improve protection against finger contact. For example, contact blades with protective cover elements may be arranged as a whole within a space surrounded by such accommodating chambers. In this case, each accommodating chamber opens in the plug-in direction, i.e., toward the plug-in surface of the plug-in connector, so that the mating connector can be plugged into it.

[0026] The contact blade may have a front recess, which forms a locking element for securing a protective cover element. The front recess may be located, for example, substantially in the center of the front of the contact blade. The front recess may be, for example, a accommodating a connecting piece that connects opposing intermediate pieces of the protective cover element. The connecting piece may be locked in place simply by being clamped in place within the front recess. Alternatively or in addition, the contact blade may have one or more projections formed in the area of ​​the front recess for locking the protective cover element.

[0027] In the context of this invention, the indefinite concept "one (ein)" should not be understood as a numeral. That is, for example, when we say "one part," it should be interpreted as "at least one part." When angles are expressed in degrees, this angle is measured relative to a 360-degree (360°) circle.

[0028] The present invention will be described in more detail below with reference to the drawings, based on exemplary embodiments. [Brief explanation of the drawing]

[0029] [Figure 1] This is a front view of an electrical plug-in connector. [Figure 2] This is a first cross-sectional view of a plug-in connector based on Figure 1. [Figure 3] This is a second cross-sectional view of the plug-in connector based on Figure 1. [Figure 4] This is a perspective view of the protective cover element. [Figure 5] This is a partially cutaway perspective view of a plug-in connector based on Figure 1. [Figure 6] This is a perspective view of a contact blade with a protective cover element. [Figure 7] This is a perspective view of a contact blade without a protective cover element. [Figure 8] This figure shows a single blade contact and a fork contact formed as the mating side, both covered by a protective cover element. [Figure 9]This is a perspective view of the protective cover element and contact blade. [Figure 10] This is a front view of a contact blade with a protective cover element. [Modes for carrying out the invention]

[0030] Figure 1 shows a front view of the electrical connector 31, that is, a view from the insertion side. Figure 2 shows a vertical cross-section of the electrical connector 31 shown in Figure 1 at cross-section AA. Figure 3 shows a horizontal cross-section of the electrical connector 31 shown in Figure 1 at cross-section BB.

[0031] As is evident from Figures 1 to 3, the plug connector 31 has a housing 3, the housing 3 having a housing chamber 30 formed in the front part. Multiple blade contacts 29 are arranged inside the housing 3. For example, in Figure 2, a complete blade contact 29 including a contact blade 2 protruding from the housing 3 can be seen, and the contact blade 2 extends into the assigned housing chamber 30. A protective cover element 1 is fitted (in other words, plugged in) onto the contact blade 2. The protective cover element 1 has connecting pieces 17 formed as engaging means within the area of ​​each narrow side cover (in other words, elongated or narrow side cover) 13, 14 and between the narrow side covers 13, 14, the connecting pieces 17 connect two intermediate pieces 15, 16 to each other, and in the case of a properly plugged protective cover element 1, cooperate with the engaging means 25 of the contact blade 2 to lock (in other words, fix) the protective cover element 1 onto the contact blade 2.

[0032] It can be seen that the housing 3 further has a housing region that protrudes forward beyond the contact blades 2, and this housing region becomes the housing chamber 30. This housing region has the function of preventing contact and of mechanically receiving, guiding, and locking a push-in connector formed as a mating side that may contain one or more fork contacts. The blade contacts 29 are locked within the housing 3 by the rear section 26. In addition, the blade contacts 29 are held within the housing 3 by engaging projections 28. The blade contacts 29 have, for example, three connecting pins 27, which protrude from the housing 3 on the lower surface of the housing 3. This allows the push-in connector 31 to be fixed, for example, on an electrical printed circuit board by soldering.

[0033] The protective cover element 1, which can already be seen in Figures 1 to 3, will be explained in more detail with reference to Figure 4. The protective cover element 1 can be formed from, for example, an insulating material, such as plastic. The protective cover element 1 has an insertion side 10 through which the contact blade 2 can be inserted, or the protective cover element 1 can be inserted onto the contact blade 2 by the insertion side 10. From the insertion side 10, a plurality of longitudinal pieces 13, 14, 15, and 16 extend forward to the front protective element 12. The protective element 12 is formed as the front piece and connects the longitudinal pieces 13, 14, 15, and 16 to each other, thereby creating a robust frame structure for the protective cover element 1. When the protective cover element 1 is inserted onto the contact blade 2, the front protective element 12 covers the front part 20 of the contact blade 2.

[0034] The longitudinal section consists of an upper narrow side cover 13, a lower narrow side cover 14, and two intermediate sections 15 and 16 extending in the insertion direction in the middle between them. The upper narrow side cover 13 and the lower narrow side cover 14 have a U-shaped cross-section, meaning they have a groove 18, and in the case of a protective cover element inserted onto the contact blade 2, they surround the side edges 23 and 24 of the contact blade 2 in a U-shape. The intermediate sections 15 and 16 cover a portion of the contact sides 21 and 22 of the contact blade 2, with the intermediate section 15 positioned on the contact side 21 and the intermediate section 16 on the opposing contact side 22. Gaps 19 are formed between the individual longitudinal sections 13, 14, 15, and 16, and these gaps 19 expose contact windows for contact between the contact sides 21 and 22 of the contact blade 2. The intermediate pieces 15 and 16 are connected to each other by the connecting piece 17.

[0035] Figure 5 shows a test of finger contact protection of a plug connector 31 equipped with a protective cover element 1, using a standardized test finger 4. It can be seen that the protective cover element 1 prevents direct electrical contact between the test finger 4 and the contact blade 2.

[0036] Figure 6 shows a further diagram of the blade contact 29 with the protective cover element 1 inserted on top. It can be seen that the front protective element 12 is thinner than the contact blade 2, and therefore a portion of the front 20 of the contact blade 2 is visible when viewed from the front (see Figure 10).

[0037] Figure 7 shows the blade contact 29 without the protective cover element. It can be seen that the contact blade 2 has a front recess 25, which serves as a locking element for securing the protective cover element 1. The front recess 25 extends in the insertion direction from the front part 20 of the contact blade 2. A projection may be formed within the recess 25 to firmly grip the connecting piece 17.

[0038] Figure 8 shows the blade contact 29 in the previously described embodiment with the protective cover element 1. In addition, a fork contact 5 is inserted onto the contact blade 2. It can be seen that the fork contact 5 has a pair of contact forks 6, which contact the left and right sides of the contact blade, i.e., the contact sides 21 and 22, at the same height. The contact forks 6 easily fit into the contact window 19 formed by the longitudinal piece of the protective cover element 1, and thus the fork contact 5 can be connected to the contact blade 2 as usual. In particular, the protective cover element 1 does not need to be removed first in order to insert the fork contact 5.

[0039] Figure 9 schematically shows a single contact blade 2 of an electrical plug connector's blade contact in the left region of the figure. Figure 9 shows only a portion of the housing 3 of this electrical plug connector, which in the shown region is made of an insulating material. The blade contact has a portion located within the housing 3 of the plug connector and a portion protruding from the housing 3, i.e., into the housing chamber 30, with this protruding portion forming the contact blade 2. The contact blade 2 protrudes from the housing 3 through a slit in the insulating material. The contact blade 2 is formed in a substantially rectangular parallelepiped shape, with its ends and edges being rounded or chamfered in particular. The contact blade 2 has two opposing contact sides 21, 22, of which only one contact side 21 is visible in Figure 9 based on the line of sight. The contact sides 21, 22 extend substantially parallel to each other. The contact sides 21, 22 constitute the largest surface area of ​​the contact blade 2. The contact sides 21 and 22 are defined above and below by side edges 23 and 24, respectively, or also by narrow edges. Towards the front, that is, away from the housing 3, the contact blade 2 terminates at a front portion 20. The front portion 20 transitions via an inclined surface to the contact sides 21 and 22 or side edges 23 and 24.

[0040] The contact blade 2 is adapted such that a fork contact having a contact fork on the opposite side is inserted thereon. In this case, the contact forks abut against the respective contact side portions 21, 22. The fork contact is inserted onto the contact blade 2 in the insertion direction corresponding to the direction of the arrow represented by L M in the front part 20 toward the housing 3.

[0041] This contact blade 2 has the following geometric dimensions. L M : The distance between the front part 20 and the insulating material of the housing 3, that is, the length by which the contact blade 2 protrudes from the insulating material. H M : It can also be referred to as the width or the height in the view based on FIG. 9, that is, the distance between the side edges 23, 24. D M : The thickness, that is, the distance between the contact side portions 21, 22.

[0042] The longitudinal pieces 13, 14, 15, 16 of the protective cover element 1 have a maximum length L B . The following are shown in FIGS. 9 and 10 as further geometric dimensions of the protective cover element 1. D B : In this case, the width of the narrow side portions of the cover 13, 14 which have the same width. B: The width of the front piece 12. D F : The thickness of the front piece 12. H B : The height of the protective cover element 1, that is, the length in the vertical direction, that is, the longitudinal axis direction.

[0043] Regarding this, for example, the following dimensional ratios are advantageous. B / L B >0.2 L B / L M <0.65 (L B −B) / L M <0.5

Explanation of Signs

[0044] 1. Protective cover element 2 Contact Blades 3 Housing 4 Testing Instructions 5 Fork contact points 6-contact fork 10 Insertion side 12 Protective Elements 13. Top narrow side cover 14. Narrow lower side cover 15 Intermediate piece 16 Intermediate piece 17 Connecting piece 19 Contact window 20 Front of the contact blade 21 Contact side 22 Contact side 23 Side edge 24 Side edge 25 Front recess 27 connection pins 28 Engagement protrusion 29 Blade contacts 30 Confinement Rooms 31 Plug-in connector B Width of the front piece D B Width of the narrow side cover D F Thickness of the front piece D M Thickness between the contact points H B Height of protective cover element H M width between side edges L M The gap between the front and the insulating material of the housing

Claims

1. A protective cover element (1) for mounting on a contact blade (2) of a blade contact (29) of an electrical plug connector (31), comprising: The contact blades (2) have a length (L) that protrudes from the insulating material of the connector housing (3) of the plug connector (31). Ｍ ) the protective cover element (1) has an insertion side (10) by which the protective cover element (1) can be pushed along a surface of the contact blade (2) from a front part (20) of the contact blade (2); the protective cover element (1) has at least one insulating protective element (12) at its front part, which when the protective cover element (1) is mounted on the contact blade (2) at least partially covers the front part (20) of the contact blade (2) in the plug-in direction of a fork contact (5) formed as a counterpart of the blade contact (29), The protective cover element (1) has a number of longitudinal pieces (13, 14, 15, 16) extending from the front protective element (12) towards the insertion side (10), and all of the longitudinal pieces (13, 14, 15, 16) have a length (L) of the contact blades (2) protruding from the insulating material. Ｍ ) is less than 75% of the length of the protective cover element.

2. 2. A protective covering element according to claim 1, characterized in that the longitudinal pieces (13, 14, 15, 16) have different lengths.

3. 2. The protective cover element according to claim 1, characterized in that a fixing element is arranged on at least one of the longitudinal pieces (13, 14, 15, 16), and the protective cover element can be fixed by means of the fixing element to a locking element of the contact blade (2) assigned as a counter part.

4. 2. The protective cover element according to claim 1, characterized in that it has at least one intermediate piece (15, 16) as a longitudinal piece (13, 14, 15, 16), which intermediate piece (15, 16) extends from the front protective element (12) towards the insertion side (10) in the area between the mutually opposing side edges (23, 24) of the contact blade (2).

5. 5. A protective cover element according to claim 4, characterized in that it comprises a pair of intermediate pieces (15, 16) which are provided on opposing contact sides (21, 22) of the contact blade (2).

6. 6. A protective cover element according to claim 5, characterized in that the pair of intermediate pieces (15, 16) are interconnected by a connecting piece (17).

7. 7. The protective cover element according to claim 6, characterized in that a fastening element is arranged on the connecting piece (17) for fastening the protective cover element (1) to the contact blade (2).

8. 5. A protective covering element according to claim 4, characterized in that at least one intermediate piece (15, 16) forms the longest of said longitudinal pieces (13, 14, 15, 16).

9. 2. The protective cover element according to claim 1, characterized in that as longitudinal pieces (13, 14, 15, 16) there is an upper narrow side cover (13) and / or a lower narrow side cover (14), which extends from the front protective element (12) towards the insertion side (10) and covers at least the area of ​​the side edges (23, 24) of the contact blades (2) when the protective cover element is mounted on the contact blades (2).

10. 10. The protective cover element according to claim 9, characterized in that the protective cover element is configured to open at the insertion side (10) without having a connection between the narrow side covers (13, 14).

11. The front protective element (12) has a front rib, and when the protective cover element (1) is mounted on the contact blade (2), the front rib extends substantially the entire length (H Ｍ 2. The protective cover element of claim 1, having a length extending over a width of the first end of the first support member.

12. The front protective element (12) is formed to have a thickness (D Ｍ ) smaller than the thickness (D Ｆ 2. The protective cover element of claim 1, further comprising:

13. A protective cover element (1) for mounting on a contact blade (2) of a blade contact (29) of an electrical plug connector (31), comprising: The contact blades protrude from the insulating material of the housing (3) of the electrical plug connector (31); the protective cover element has an insertion side (10) by which the protective cover element (1) can be pushed along a surface of the contact blade (2) from a front part (20) of the contact blade (2); the protective cover element has at least one insulating protective element (12) at its front part, which when the protective cover element is mounted on the contact blade (2) at least partially covers the front part (20) of the contact blade (2) in the plug-in direction of a fork contact (5) formed as a counterpart of the blade contact (29), the protective cover element has a number of longitudinal pieces (13, 14, 15, 16) extending from the front protective element (12) towards the insertion side (10), in which there are upper narrow side covers (13) and / or lower narrow side covers (14) extending from the front protective element (12) towards the insertion side (10), and when the protective cover element is mounted on the contact blades (2), it covers at least the area of ​​the side edges (23, 24) of the contact blades, 1. A protective cover element, characterized in that the protective cover element is configured to open at the insertion side (10) without having a connection between narrow side covers (13, 14).

14. An electrical plug connector (31) having a connector housing (3) made of insulating material and at least one blade contact (29), said blade contact (29) having a contact blade (2) protruding from said insulating material, said contact blade (2) having a length (L) that protrudes from said insulating material of said electrical plug connector (31). Ｍ 1. An electrical plug-in connector having a contact blade (2), characterized in that the protective cover element (1) according to claim 1 is mounted on the contact blade (2) and fixed to the contact blade (2) by mating means, friction means and / or integral means.

15. 15. The electrical plug connector according to claim 14, characterized in that the contact blades (2) have recesses (25) at the front, said recesses (25) at the front forming locking elements for fixing the protective cover element (1).

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