PROTECTIVE COVER ELEMENT AND ELECTRICAL PLUG-AND-SOCKET CONNECTOR

Abstract

A protective cover element for mounting on a contact blade of a blade contact of an electrical plug-and-socket connector projecting out of an insulating material, as well as to an electrical plug-and-socket connector with at least one such protective cover element.

Claims

1. A protective cover element for mounting on a contact blade of a blade contact of an electrical plug-and-socket connector, a length of which contact blade projects out of an insulating material of a connector housing of the plug-and-socket connector, the protective cover element comprising: an insertion side with which the protective cover element is adapted to be pushed over the contact blade from a front of the contact blade; at least one insulating protective element arranged on the front that at least partially covers the front of the contact blade in a plug-in direction of a bifurcated contact designed as a mating part for the blade contact when the protective cover element is mounted on the contact blade; and at least two longitudinal ribs extending from the protective element on the front in the direction toward the insertion side, wherein the at least two longitudinal ribs are shorter than 75% of the length with which the contact blade projects out of the insulating material.

2. The protective cover element according to claim 1, wherein the longitudinal ribs have different lengths.

3. The protective cover element according to claim 1, wherein a fastening element, with which the protective cover element is adapted to be fastened to a securing element, associated as a mating part of the contact blade, is arranged on at least one of the longitudinal ribs.

4. The protective cover element according to claim 1, wherein the protective cover element has, as a longitudinal rib, at least one intermediate rib that extends in a region between opposing lateral edges of the contact blade from the protective element on the front in the direction toward the insertion side.

5. The protective cover element according to claim 4, wherein the protective cover element has intermediate ribs in pairs, in each case on opposing contact sides of the contact blade.

6. The protective cover element according to claim 5, wherein the paired opposing intermediate ribs are connected to one another by a connecting rib.

7. The protective cover element according to claim 6, wherein a fastening element for fastening the protective cover element to the contact blade is arranged on the connecting rib.

8. The protective cover element according to claim 4, wherein at least one intermediate rib constitutes a longest longitudinal rib.

9. The protective cover element according to claim 1, wherein a top narrow-side cover and/or a bottom narrow-side cover, extending from the protective element on the front in the direction toward the insertion side, is arranged as a longitudinal rib and covers at least areas of a respective lateral edge of the contact blade when the protective cover element is mounted on the contact blade.

10. The protective cover element according to claim 9, wherein the protective cover element is open on the insertion side with no connection between narrow-side covers.

11. The protective cover element according to claim 1, wherein the protective cover element has, as a protective element on the front, a front rib having such a length that it extends across essentially the entire length of the front of the contact blade when the protective cover element is mounted on the contact blade.

12. The protective cover element according to claim 1, wherein the protective element on the front has a lesser thickness than the thickness of the contact blade.

13. A protective cover element for mounting on a contact blade of a blade contact of an electrical plug-and-socket connector, which contact blade projects out of an insulating material of a housing of the plug-and-socket connector, the protective cover element comprising: an insertion side with which the protective cover element is adapted to be pushed over the contact blade from a front of the contact blade; at least one insulating protective element on the front that at least partially covers the front of the contact blade in a plug-in direction of a bifurcated contact designed as a mating part for the blade contact when the protective cover element is mounted on the contact blade; and at least two longitudinal ribs extending from the protective element on the front in the direction toward the insertion side, wherein a top narrow-side cover and/or a bottom narrow-side cover, extending from the protective element on the front in the direction toward the insertion side, is present as a longitudinal rib and covers at least areas of a respective lateral edge of the contact blade when the protective cover element is mounted on the contact blade, wherein the protective cover element is open on the insertion side with no connection between narrow-side covers.

14. An electrical plug-and-socket connector with a connector housing made of insulating material and with at least one blade contact that has, projecting out of the insulating material, a contact blade, a length of which projects out of the insulating material of the plug-and-socket connector, wherein a protective cover element according to claim 1 is mounted on the contact blade and is fastened to the contact blade by interlocking, frictional, and/or formed integrally.

15. The electrical plug-and-socket connector according to claim 14, wherein the contact blade has a recess on the front that forms a securing element for fastening the protective cover element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitive of the present invention, and wherein:

[0028] FIG. 1 is a front view of an electrical plug-and-socket connector,

[0029] FIG. 2 is the plug-and-socket connector according to FIG. 1 in a first sectional view,

[0030] FIG. 3 is the plug-and-socket connector according to FIG. 1 in a second sectional view,

[0031] FIG. 4 is a protective cover element in a perspective view,

[0032] FIG. 5 is the plug-and-socket connector according to FIG. 1 in a partially sectioned, perspective view,

[0033] FIG. 6 is a contact blade with protective cover element in a perspective view,

[0034] FIG. 7 is a contact blade without protective cover element in a perspective view,

[0035] FIG. 8 is a single blade contact with protective cover element pushed on as well as a bifurcated contact designed as a mating part,

[0036] FIG. 9 is a protective cover element as well as a contact blade in a perspective view, and

[0037] FIG. 10 is a front view of a contact blade with a protective cover element.

DETAILED DESCRIPTION

[0038] FIG. 1 shows a front view of an electrical plug-and-socket connector 31, which is to say a view of the plug-in face. FIG. 2 shows a vertical section through the electrical plug-and-socket connector 31 in the section plane A-A indicated in FIG. 1.

[0039] FIG. 3 shows a horizontal section through the electrical plug-and-socket connector 31 in the section plane B-B indicated in FIG. 1.

[0040] As FIGS. 1 to 3 illustrate, the plug-and-socket connector 31 has a housing 3, on the front of which are formed receiving cavities 30. Arranged in the housing 3 are multiple blade contacts 29. Visible, for example in FIG. 2, is the entire blade contact 29 with the contact blade 2 that projects out of the housing 3 and extends into an associated receiving cavity 30. Mounted on the contact blade 2 is a protective cover element 1. In the region of each narrow-side cover 13, 14 as well as between the narrow-side covers 13, 14, the protective cover element 1 has a connecting rib 17 designed as a latch, which connects two intermediate ribs 15, 16 to one another, and which interacts with the latch 25 of the contact blade 2 when the protective cover element 1 is correctly mounted, securing the protective cover element 1 on the contact blade 2.

[0041] It can furthermore be seen that the housing 3 has a housing region that protrudes forward past the contact blade 2 and that has the receiving cavities 30. This housing region serves the function of protection against accidental contact and to mechanically receive, guide, and secure a plug-and-socket connector designed as a mating part, which can contain one or more bifurcated contacts. The blade contact 29 is secured in the housing 3 by a rear section 26. The blade contact 2 is additionally held in the housing 3 by latching projections 28. The blade contact 29 has, for example, three terminal pins 27 that protrude out of the housing 3 at an underside thereof. In this way, the plug-and-socket connector 31 can be fastened to an electrical circuit board by soldering, for example.

[0042] The protective cover element 1 already visible in FIGS. 1 to 3 is explained in detail with reference to FIG. 4. The protective cover element 1 can be made entirely of, e.g., insulating material, for example of plastic. The protective cover element 1 has an insertion side 10, through which the contact blade 2 can be inserted or with which the protective cover element 1 can be mounted on the contact blade 2. From the insertion side 10, multiple longitudinal ribs 13, 14, 15, 16 extend forward to a protective element 12 on the front. This element is designed as a front rib and connects the longitudinal ribs 13, 14, 15, 16 to one another, resulting in a robust frame structure of the protective cover element 1. In the state in which the protective cover element 1 is mounted on the blade contact 2, the protective element 12 on the front covers the front 20 of the contact blade 2.

[0043] Present as longitudinal ribs are a top narrow-side cover 13, a bottom narrow-side cover 14, as well as two intermediate ribs 15, 16 extending in the insertion direction in the center between them. The top narrow-side cover 13 and the bottom narrow-side cover 14 are U-shaped in profile, which is to say they have grooves 18, and, when the protective cover element is mounted on the contact blade 2, they surround its lateral edges 23, 24 in a U-shape. The intermediate ribs 15, 16 cover parts of the contact sides 21, 22 of the contact blade 2, wherein the intermediate rib 15 is arranged on the contact side 21 and the intermediate rib 16 on the opposite contact side 22. Formed between the individual longitudinal ribs 13, 14, 15, 16 are free spaces 19 that expose contact windows for establishment of electrical contact with the contact sides 21, 22 of the contact blade 2. The intermediate ribs 15, 16 are connected to one another by a connecting rib 17.

[0044] FIG. 5 shows testing of the finger touch protection of the plug-and-socket connector 31 with the protective cover elements 1 using a standardized test finger 4. It can be seen that the protective cover element 1 prevents direct electrical contact of the test finger 4 with a contact blade 2.

[0045] FIG. 6 shows the blade contact 29 with the protective cover element 1 mounted thereon in a different view. It can be seen that the protective element 12 on the front is narrower than the contact blade 2, so that a part of the front 20 of the contact blade 2 is visible even in a front view (see FIG. 10).

[0046] FIG. 7 shows the blade contact 29 without the protective cover element. It can be seen that the contact blade 2 has a recess 25 on the front, which forms a securing element for fastening the protective cover element 1. The recess 25 on the front extends in the plugging direction from the front 20 of the contact blade 2. Barbs for clamping the connecting rib 17 in place can be formed in the recess 25.

[0047] FIG. 8 shows the blade contact 29 in the embodiment that has already been described with a protective cover element 1. In addition, a bifurcated contact 5 is mounted on the contact blade 2. It can be seen that the bifurcated contact 5 has contact forks 6 formed in pairs, which come to rest on the contact blade on the left and right thereof, which is to say on the contact sides 21, 22, at the same level in each case, and establish contact. The contact forks 6 readily fit into the contact windows 19 of the protective cover element 1 formed by the longitudinal ribs, so that the bifurcated contact 5 can be connected to the contact blade 2 in the usual manner. In particular, it is not necessary to first remove the protective cover element 1 in order to mount the bifurcated contact 5.

[0048] In the left-hand region, FIG. 9 schematically shows a single contact blade 2 of a blade contact of an electrical plug-and-socket connector, of which only a part of the housing 3 is partially shown in FIG. 1, which housing is made of insulating material in the region shown. The blade contact has a part arranged in the housing 3 of the plug-and-socket connector and a part, which constitutes the contact blade 2, projecting out of the housing 3 or projecting into the receiving cavity 30. The contact blade 2 projects out of the housing 3 through a slot in the insulating material. The contact blade 2 is essentially cuboid in design, wherein the edges and borders, in particular, can be rounded or chamfered. The contact blade 2 has two opposing contact sides 21, 22, of which only one contact side 21 is visible in FIG. 9 on account of the viewing direction. The contact sides 21, 22 are essentially parallel to one another. They are the largest sides of the contact blade 2 in terms of area. The contact sides 21, 22 are each delimited to the top and the bottom by lateral edges 23, 24 or also narrow edges. Toward the front, which is to say on the side facing away from the housing 3, the blade contact 2 terminates at a front 20. This transitions into the contact sides 21, 22 or the lateral edges 23, 24 through chamfers.

[0049] The contact blade 2 is set up such that a bifurcated contact with contact forks is mounted thereon as a mating part. The contact forks then come to rest on the respective contact sides 21, 22. The bifurcated contact is plugged onto the contact blade 2 in a plug-in direction that corresponds to the direction of the arrow labeled L.sub.M, which is to say in the direction toward the housing 3 from the front 20.

[0050] The contact blade 2 has the following geometric dimensions in this case:

[0051] L.sub.M: the distance between the front 20 and the insulating material of the housing 3, which is to say the length with which the contact blade 2 projects out of the insulating material.

[0052] H.sub.M: width, or can also be designated height in the depiction in FIG. 9, which is to say the distance between the lateral edges 23, 24.

[0053] D.sub.M: thickness, which is to say distance between the contact sides 21, 22.

[0054] The longitudinal ribs 13, 14, 15, 16 of the protective cover element 1 have a maximum length L.sub.B.

[0055] The following are shown in FIGS. 9 and 10 as additional geometric dimensions of the protective cover element 1:

[0056] D.sub.B: width of the narrow-side covers 13, 14, which in the present case are equal in width.

[0057] B: width of the front rib 12.

[0058] D.sub.F: thickness of the front rib 12.

[0059] H.sub.B: height of the protective cover element 1, which is to say extent in the vertical direction, in other words in the direction of the vertical axis.

[0060] In this context, the following dimensional relationships are advantageous, for example:

B/L.sub.B>0.2

L.sub.B/L.sub.M<0.65

(L.sub.B−B)/L.sub.M<0.5

[0061] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.