Shielded push-pull plug with shielding spring

Abstract

The invention relates to a shielded push-pull plug (1) having a shielding spring (11) which, when viewed in the plug-in direction, has a forward web-like projection (15, 16), the snap ring (10) having a web-like recess which corresponds to the web-like projection (15, 16) of the shielding spring (11) and in which the projection (15, 16) of the shielding spring (11) is arranged, the shielding spring (11) and the clamping ring (10) are arranged in such a way that the sheet-shaped projections (15, 16) of the shielding spring (11) and the sheet-shaped projections (15, 16) of the clamping ring (10) together form a completely surrounding projection. The invention relates to a push-pull plug (1) having a completely circumferential projection (2) which rests in an undercut (24) of the built-in plug and at this time a shielding spring (11) made of a metallic material connects a shielding of the push-pull plug (1) to the built-in plug, the shielding spring (11) being electrically connected directly or indirectly to a shielding of a cable on which the push-pull plug (1) is arranged.

Description

Technical Field

[0001] The invention relates to a shielded push-pull plug, which can be inserted into an internal plug (also called an internal coupling, depending on the embodiment) and latched therein, according to the features of the preambles of the two independent claims. Background Art

[0002] The known shielded push-pull plug has a contact carrier with at least one contact cavity into which a contact counterpart is inserted. A shielding sleeve made of a conductive material is arranged around the contact carrier. A snap ring is arranged around the shielding sleeve, which has a completely surrounding protrusion pointing forward in the plug-in direction (in the direction of the plug-in surface), and when the push-pull plug is inserted into the built-in plug, the protrusion can be operatively connected to the undercut of the built-in plug (usually and hereinafter also referred to as the mating plug). A gripping sleeve (hereinafter also referred to as a nut) is arranged around the snap ring, and when the push-pull plug is to be pulled out of the built-in plug, the snap ring can be manipulated by means of the gripping sleeve, wherein, by the axial movement of the gripping sleeve, the inner contour of the gripping sleeve acts on the surrounding slope of the snap ring at the front end and presses the slope downward at this time, whereby the completely surrounding protrusion of the snap ring is pressed downward and is removed from the undercut of the built-in plug at this time. In this case, a further axial displacement of the grip sleeve has the effect that the push-pull plug can be completely pulled out of the built-in plug. Summary of the invention

[0003] The object of the present invention is to improve the known shielded push-pull plug with regard to its shielding properties.

[0004] According to a first embodiment, this object is achieved by providing a shielding spring which, viewed in the plugging direction, has a tongue-shaped projection facing forward, wherein the retaining ring has a tongue-shaped recess corresponding to the shielding spring's tongue-shaped projection, the shielding spring's projection being arranged (engaged) in the recess, so that the shielding spring's tongue-shaped projection and the tongue-shaped projection of the retaining ring together form a completely surrounding projection, which rests in the undercut of the built-in plug, and in this case the shielding spring made of metal material connects the shield of the push-pull plug to the built-in plug. At the same time, the shielding spring is directly or indirectly electrically connected to the shield of the cable on which the push-pull plug is arranged.

[0005] In a further development of the invention, it is provided that the web-shaped projection originates from a cylindrical base body of the shielding spring. With the aid of the base body, the shielding spring can be designed in such a way that it abuts both against the retaining ring and against the shielding sleeve or between partial regions of these two elements. This allows a mechanical arrangement and fixation between the retaining ring (when made of a metallic material) and the shielding sleeve (when also made of a metallic material) and, alternatively or additionally, electrical contact to be achieved under elastic action.

[0006] Alternatively, the shielding spring can be arranged at least in a partial region between the shielding sleeve and the nut.

[0007] In a further development of the invention, it is provided that the base body has a slot extending parallel to the longitudinal axis of the shielding sleeve. As a result, when the base body is arranged and fixed in its installed position, the base body has an elastic effect. As a result, on the one hand, the base body is fixed and on the other hand, electrical contact can be permanently achieved under the elastic effect.

[0008] In a further development of the invention, it is provided that at least one approximately U-shaped spring element (bend) protrudes from the base body. The at least one approximately U-shaped spring element (or more than one such element distributed over the circumference of the base body) increases the spring action. On the other hand, tolerances can be compensated. Furthermore, the shielding spring is adapted in its installation space between the retaining ring (or optionally also the nut) and the shielding sleeve, in particular under spring action.

[0009] In a further development of the invention, it is provided that at least one latching tab is formed by the base body. By means of the at least one latching tab, preferably a plurality of latching tabs distributed over the circumference of the base body, the shielding spring can be fixed in its installation space to the participating elements, such as a clamping ring, a nut and / or a shielding sleeve. For this purpose, these elements can have corresponding corresponding geometries, such as depressions, circumferential grooves, etc., into which the at least one latching tab engages when the shielding spring is arranged in its installed position in a desired manner.

[0010] According to a second embodiment, this object is achieved in that a spring ring is inserted into the front region of the push-pull plug, in particular in its retaining ring, which spring ring cooperates with an undercut, in particular a groove, of the built-in plug after the push-pull plug has been inserted into the built-in plug, wherein the spring ring is designed to be circumferentially corrugated.

[0011] Further embodiments of this second concept with a spring ring are described in conjunction with the associated figures. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Embodiments of the two aforementioned approaches are shown and described below.

[0013] existFigures 1 to 7 Schematic diagram of a plug 1 according to a first aspect of the present invention. DETAILED DESCRIPTION

[0014] according to Figure 1 The plug 1 has a shielding sleeve 2, wherein a nut 3 that can move relative to the shielding sleeve, in particular a movable nut 3, is arranged on a partial area of ​​the shielding sleeve 2. A further housing-shaped element of the plug 1, in particular an injection-molded coating 4, is arranged behind one end of the nut 3. A shielded cable 5 emerges from this element, in particular the injection-molded coating 4.

[0015] exist Figure 2 1 shows the plug 1 in a sectional view. In addition, the contact 6 can be seen, which is arranged in a contact cavity (not shown in more detail) of a contact carrier, which is arranged inside the shielding sleeve 2. The electrical conductor 7, more precisely the front end of the cable 5 whose insulation is removed, is connected to the contact 6. The plug 1 has at least one contact 6, but usually a plurality of contacts 6 and corresponding electrical conductors 7. The shielding of the cable 5 is indicated by the reference numeral 8, which is connected and electrically contacted to the shielding sleeve 2 composed of an electrically conductive material in the connection area 9. The clamping ring 10 for realizing a push-pull connection with a mating plug is arranged inside the nut 3 and overlaps a part of the shielding sleeve 2 with its front end. The shielding spring is provided with the reference numeral 11, which is arranged around the shielding sleeve 2 and is also composed of an electrically conductive material.

[0016] exist Figure 3 1 shows a plug 1 which is plugged into a mating plug. The front end 12 of the nut 3 is roughly bent and lies on the slope 13 of the clamping ring 10. The front latching tab 14 of the clamping ring 10 is operatively connected to the housing 20 of the mating plug. The housing 20 accommodates contacts 21 of the mating plug, which are plugged into the contacts 6 of the plug 1. In addition, the housing 20 has, for example, a surrounding frame 22, in the region of which a surrounding seal 23 is arranged. The housing 20 is inserted into an opening (not shown) of, for example, an electronic device and is fixed there in a sealing manner by means of the seal 23. As an alternative to the built-in plug, the mating plug can also be arranged on the end of the cable. The housing 20 has a latching-shaped projection 24, which forms an undercut for the front latching tab 14 of the clamping ring 10. The clamping ring 10 made of plastic or metal is latched in the mating plug (also called built-in coupling) and is responsible for the retention force of the plug connection. The shielding part is guided from the shielding sleeve 2 via the shielding spring 11 directly to the housing 20 of the mating plug (see Figure 3 The shielding spring 11 centers the clamping ring 10 and the nut 3 on the shielding sleeve 2 and has corresponding centering elements (see Figure 7 ). Alternatively, the centering element of the shielding spring 11 can also be designed to be elastic and the shielding sleeve 2 can be in contact with the hooks.

[0017] As in Figure 3 As can be seen in the figure, the plug connection formed by plugging the plug 1 and the mating plug together is loosened by operating the nut 3. Figure 3 When the nut 3 is moved (to the right when the nut 3 is moved), the ramp 13 is actuated by the front bent end 12 of the nut 3, whereby the front end 14 of the retaining ring 3 moves downward (deflects), so that the front end 14 is no longer located in the area of ​​the undercut 24 of the housing 20 of the mating plug. As a result, the plug 1 can be pulled out of the mating plug with only a small force after the nut 3 has been moved. This in turn means that when plugged together, the front end 14 of the retaining ring 10 is brought into the undercut geometry by the front end 24 of the housing 20, because the front end of the retaining ring 10 is deflected approximately in the direction of the longitudinal axis of the plug 1 by the ramp 13 and after the plugging together process is completed, the undercut formed by the front end 24 of the housing 20 acts behind, so that the plug-in connection can no longer be disconnected from each other without actuating the nut 3. This is also called a push-pull process.

[0018] exist Figure 4 The area around the shielding spring 11 is shown in detail in FIG. It can be seen that the front end of the shielding spring 11 forms the contact point 15 between the shielding spring 11 and the housing 20 of the mating plug (internal coupling). In order to ensure that this front area of ​​the shielding spring 11 is constantly in contact with the housing 20, the contact legs (web-shaped projections 16) of the shielding spring 11 are designed to be elastic. In addition, a roughly U-shaped bend 17 is provided in the end area of ​​the shielding spring 11. When observing Figure 4 When the plug 1 is realized, the lower horizontal leg of the bent portion 17 is not free-floating, but a partial area of ​​the clamping ring 10 is arranged between the lower horizontal leg and the inner contour of the nut 3 (such as in Figure 3 (see ).

[0019] exist Figure 5 1 shows the interior of the plug 1, wherein the shielding spring 11 is arranged on the rear region of the shielding sleeve 2. The shielding spring 11 contacts the shielding sleeve 2 via its contact legs 16 and the spring element. The forwardly protruding projection on the shielding spring 11 engages in the recess in the shielding sleeve 2 and serves to lock the shielding spring 11 against rotation. The shielding spring 11 is located with its base in a recess (or a retracted subregion with a smaller diameter) in the shielding sleeve 2, i.e., more precisely, the shielding spring 11 is arranged with its base on this subregion of the shielding sleeve 2 with a smaller diameter.

[0020] exist Figure 61 shows the plug 1 after the nut 3 has been installed. It can be seen here that the front end of the shielding sleeve 2 remains exposed. Behind the front end of the shielding sleeve and in front of the beginning of the front end of the nut 3, the front latching tabs of the clamping ring 10 and the contact legs 16 of the shielding spring 11 can be seen. The two last-mentioned elements are distributed alternately on the circumference. The contact legs 16 of the shielding spring 11 are therefore positioned between the latching arms (front end 14 of the clamping ring 10) and in turn serve as a locking element to prevent the clamping ring 10 from twisting.

[0021] exist Figure 7 1 shows the shielding spring 11 in detail. Here again, the front ends of the tab-shaped projections forming the contact points 15, which are arranged on the contact arms 16, can be seen. In addition, the U-shaped elements (bends 17) can be seen. Each contact leg 16 protrudes from the base 18 of the shielding spring 11, just like the bends 17. In this embodiment, the base 18 is designed to be roughly cylindrical, but is interrupted in its circumferential direction by a gap 19 for achieving the elastic effect. Alternatively, the base 18 can also be closed in its circumference. In addition, latching tabs, which are not indicated in more detail, are arranged in the base 18.

[0022] exist Figures 8 to 11 1 shows a plug 1 according to a second embodiment of the invention. Identical elements for both embodiments are provided with the same reference numerals. Furthermore, the insertion principle according to the push-pull process is identical in both embodiments, so that in the plug 1 according to the second embodiment, the same elements with the same functions as in the plug 1 according to the first embodiment are also used and applied for this purpose.

[0023] exist Figure 8 and Fig. 9 The difference of the plug 1 according to the second solution can be directly seen in FIG. Therefore, in the front area of ​​the plug 1, a spring ring 30 is arranged in or on the shielding sleeve 2. The spring ring 30 is electrically connected to the shielding part 9 of the cable 5 through the shielding sleeve 2 made of metal material.

[0024] In observation Fig.10 It can be seen that the spring washer 30 bears against the inner contour of the housing 20 of the mating plug when the plug 1 is inserted into the mating plug and locked by means of the snap ring 10. Here too, the snap ring 10, more precisely its front end, can be actuated by moving the nut 3, so that the undercut geometry in the front end 24 of the mating plug is released and the plug 1 can be pulled out of the mating plug.

[0025] Fig.11The plug 1 according to the second embodiment is shown with a view of its plug-in surface, wherein it can be seen in particular that the contacts are arranged in a contact carrier, wherein the contact carrier is arranged in the shielding sleeve 2 (and also in the further course in the clamping ring 10 and therefore also in the nut 3). It can also be seen that the spring ring 30 is designed to be approximately wavy. The spring ring 30 rests with the corresponding valleys on its associated contact surface on the shielding sleeve 2, in particular in the bottom of the groove in the shielding sleeve 2, and forms a contact point there. The high points of the spring ring 30 located next to the corresponding valleys form the contact surface, or more precisely the contact point, of the spring ring 30 in the direction of the inner contour of the housing 20 of the mating plug. Therefore, the spring ring 30 in the plugged-in state brings about an electrical contact of the shield 9 of the cable 5 in the direction of the shield of the mating plug, because the spring ring 30 electrically rests against the housing 20 of the mating plug, which is made of a metallic material.

[0026] Reference numerals list

[0027] 1 plug

[0028] 2 Shielding sleeve

[0029] 3 Nut (grip sleeve)

[0030] 4Injection molding department

[0031] 5. Cables

[0032] 6 contacts

[0033] 7 Electrical Conductors

[0034] 8 Shielding

[0035] 9Connection Area

[0036] 10 Snap ring

[0037] 11 Shielding spring

[0038] 12 front end

[0039] 13 Slope

[0040] 14 front end

[0041] 15 tab-shaped protrusions (contact points)

[0042] 16 tab-like protrusions (contact legs)

[0043] 17 Bending section

[0044] 18 Matrix

[0045] 19 Gap

[0046] 20 Shell

[0047] 21 contacts

[0048] 22 Surround frame

[0049] 23 Seals

[0050] 24 front end

[0051] 30 Spring ring

Claims

1. A shielded push-pull plug (1) having a contact carrier, the contact carrier having at least one contact cavity, into which a contact counterpart (6) is inserted, wherein: A shielding sleeve (2) made of an electrically conductive material is arranged around the contact carrier, wherein a clamping ring (10) is arranged around the shielding sleeve (2), the clamping ring having a completely surrounding projection (12) pointing forward in the plug-in direction, the projection being operatively connectable to an undercut (24) of the built-in plug, wherein a gripping sleeve (3) is also arranged around the clamping ring (10) and can be used to manipulate the push-pull plug (1) when the push-pull plug (1) is to be pulled out of the built-in plug. The clamping ring (10) is moved vertically, wherein, by axial movement of the grip sleeve (3), the front end (12) of the grip sleeve acts on the circumferential ramp (13) of the clamping ring (10) and presses it downwards, whereby the completely circumferential projection (14) of the clamping ring (10) is pressed downwards and is removed from the undercut (24) of the built-in plug, wherein further axial movement of the grip sleeve (3) causes the push-pull plug (10) to move downwards. ) can be completely pulled out of the built-in plug, characterized in that a shielding spring (11) is provided, the shielding spring having a web-shaped projection (15, 16) viewed forward in the plug-in direction, wherein the clamping ring (10) has a web-shaped recess corresponding to the web-shaped projection (15, 16) of the shielding spring (11), the projection (15, 16) of the shielding spring (11) being arranged in the web-shaped recess so that the web-shaped projection (15, 16) of the shielding spring (11) The projections (15, 16) of the push-pull plug (1) and the tab-shaped projections (15, 16) of the clamping ring (10) together form a completely circumferential projection, which abuts against the undercut (24) of the built-in plug, and at the same time, a shielding spring (11) made of a metal material connects the shielding part of the push-pull plug (1) to the built-in plug, wherein the shielding spring (11) is directly or indirectly electrically connected to the shielding part of the cable on which the push-pull plug (1) is arranged.

2. The shielded push-pull plug (1) according to claim 1, characterized in that: The web-shaped projections (15, 16) originate from a cylindrical base body (18) of the shielding spring (11).

3. The shielded push-pull plug (1) according to claim 2, characterized in that: The base body (18) has a slot (19) extending parallel to the longitudinal axis of the shielding sleeve (11).

4. The shielded push-pull plug (1) according to claim 2 or 3, characterized in that: At least one approximately U-shaped spring element (18) originates from the base body (18).

5. The shielded push-pull plug (1) according to claim 2, 3 or 4, characterized in that: At least one latching tab is formed by the base body (18).

6. A shielded push-pull plug (1) having a contact carrier, the contact carrier having at least one contact cavity, into which a contact counterpart (6) is inserted, wherein: A shielding sleeve (2) made of an electrically conductive material is arranged around the contact carrier, wherein a clamping ring (10) is arranged around the shielding sleeve (2), the clamping ring having a completely circumferential projection (12) pointing forward in the plug-in direction, the projection being operatively connectable to an undercut (24) of the built-in plug, wherein a gripping sleeve (3) is also arranged around the clamping ring (10), the clamping ring (10) being able to be manipulated by means of the gripping sleeve when the push-pull plug (1) is to be pulled out of the built-in plug, wherein the front end (12) of the gripping sleeve acts on the circumferential protrusion of the clamping ring (10) by axial movement of the gripping sleeve (3). The invention relates to a method for preparing an electric push-pull plug (1) and a method for preparing an electric push-pull plug (1) comprising: placing the push-pull plug (1) on a ramp (13) and pressing the ramp downwards, whereby a completely circumferential projection (14) of the retaining ring (10) is pressed downwards and is removed from an undercut (24) of the built-in plug, wherein a further axial displacement of the grip sleeve (3) causes the push-pull plug (1) to be completely pulled out of the built-in plug, characterized in that a spring ring (30) is inserted into the front region of the push-pull plug (1) and cooperates with an undercut of the built-in plug therein after the push-pull plug (1) has been inserted into the built-in plug, wherein the spring ring (30) is circumferentially wavy in shape.

7. The shielded push-pull plug (1) according to claim 6, characterized in that: The spring ring (30) is arranged in the snap ring (10).

8. The shielded push-pull plug (1) according to claim 6, characterized in that: The spring ring (30) is arranged in the shielding sleeve (2).

9. The shielded push-pull plug (1) according to claim 6, 7 or 8, characterized in that: The undercut of the built-in plug is a groove.

10. The shielded push-pull plug (1) according to any one of claims 6 to 9, characterized in that: The spring ring (30) is closed in its encirclement.

11. The shielded push-pull plug (1) according to any one of claims 6 to 9, characterized in that: The spring ring (30) is interrupted in its circumference.

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