CH711546A1

CH711546A1 - Mechanical protection of an electrical connector.

Info

Publication number: CH711546A1
Application number: CH01350/15A
Authority: CH
Inventors: Heule Egon
Original assignee: A Steffen Ag Elektrohandel
Priority date: 2015-09-17
Filing date: 2015-09-17
Publication date: 2017-03-31
Also published as: CH711546B1

Abstract

Cable and plug connections are often separated unintentionally, which can lead to considerable damage. A spring-loaded locking device (2) engages with a cam (7) in a protective collar (11) of a plug-in connection (9) and secures the latter against unwanted withdrawal of the plug (1). The subject of the invention is not proprietary and can be adapted to single and multi-phase plugs of various sizes, current and voltage loads.

Description

[0001] The present invention relates to a mechanical securing an electrical connector according to the preamble of claim 1.

[0002] Connectors having round contact pins international correspond to the type and J are in Switzerland in 1011 SEV standardized and notoriously known for device connections with a load of up to 10 A at 250 V.

[0003] In use, electrical equipment is often carried out a tensile load on the cable, which for example, is sufficient to separate the plug and coupling a cable extension. It finds application in household and professional use again and again that a plug is accidentally pulled out of a socket. - This has resulted in critical applications even to drop.

SUMMARY OF THE INVENTION It is therefore an object of the invention to provide a mechanical safety device which satisfies the normal tensile load of three-pole plug connections in everyday life and prevents unintentional removal of the plug.

[0005] The plug-in connection is not intended to be proprietary, ie plugs with a mechanical fuse and those without (standard plug) should fit into the same coupling part.

[0006] As coupling elements, cable couplings with protective collars are also considered as recessed three-pole sockets (SEV 6535-2: 2009) into which plugs with partially insulated plug pins conform to SEV 6534-2: 20.

The design should be designed in such a way that it is generally also applicable in thin-walled plugs and couplings of other countries and does not lead to unintentional loosening of the connection even after prolonged and intensive use.

[0008] According to the invention the front in the plug a spring-loaded locking device, which is projecting out of the plug upper part and which engages in protective collar of the coupling part and disengageable by a key.

[0009] The subject invention is not limited to a particular type of plug. Thus, for example, the necessary restoring force of the locking device can generate by one or more springs, so that the height of the device can be adapted to the existing geometric relationships.

[0010] In dependent claims, advantageous embodiments are hereinafter discussed.

[0011] Wedge-shaped cam according to claim 2, in conjunction with form-fit in the notches counterpart provide a secure locking.

[0012] proved to have two spaced-apart cam according to claim 3, which compensates for manufacturing tolerances in the connector, so that in the manufacturing no increased precision is required.

[0013] As an alternative to a parallel disengageable locking device may be such as a rocker (one-armed or two-armed lever) is performed; see. Claim. 4

[0014] According to claim 5 it is recommended that in the interior of the push button, a spring housing to be arranged so that the spring is guided orthogonally to its support; in addition, a corresponding spring bearing is provided for centering.

[0015] If necessary, the height of the device can be reduced by one or more leaf springs claim. 6

Since the central centering of the upper part and lower part, which is present in many plugs, is limited by the locking device, it is recommended to provide sealing strips and grooves on the edge, see claim 7.

[0017] In order not to injure cables connected in the plug housing, claim 8, for the attachment of a support plate, countersunk screws are provided.

[0018] The subject matter of the invention will be explained below, but not limited to, the examples of connectors of the Swiss standard. Show it:

1 shows a plug according to the invention with its locking device, FIG.

FIG. 2 shows a coupling part prepared for securing the plug. FIG. 1,

FIG. 3 shows the front side of the clutch according to FIG. 2, with the configuration of the securing notches,

FIG. 4 is a sectional view of the assembled plug connection according to FIG. 1 and FIG. 2,

FIG. 5 shows a one-piece locking device with its functional elements,

FIG. 6 is a plan view of the upper plug part of FIG. 1 viewed from the inside;

FIGS. 7a to 7c show details of the support plate from FIGS

FIG. 8 shows a conventional recessed three-pole socket with an inventive equipment.

[0019] A two-piece connector of the Swiss type 12 is indicated in Figure 1 1. be plug upper part 1a, the lower plug part with 1b. Protrude frontally three pins from the connector 1, an outer conductor 4a (= phase), a central earth pin 3 and a neutral conductor 4b. From the connector shell 1 a protrude above wedge-shaped cam 7 and slightly rearwardly offset a key 6, and form a locking device 2. Behind it a recessed grip is 8. The pins of the outer conductor 4a and the neutral line 4b with the security housing side an insulation 5 on ,

By pressing the button 6, the cams 7 are inserted orthogonally into the upper connector part 1a so that the plug 1 can easily be inserted into the coupling 9, 10 according to FIG. By releasing the button 6, the cams 7 engage in securing notches 16 and effect a reliable mechanical connection of the two device parts. FIG. 2 also shows a socket 14 (phase) and the downwardly offset socket 15 (neutral conductor). The clutch is also embodied in a two-part manner, wherein the clutch upper part 9 is separated from the clutch lower part 10 by a connecting point 17. Furthermore, the protective collar 11 according to the invention can be seen, which is a component of the coupling lower part 10 and which likewise has a handle recess 12 and additionally a corrugation 13.

[0021] The representation of Fig. 3 shows the embodiment of the securing notches 16 into which a form-locking fit the tops of the wedge-shaped cam 7.

[0022] Further details of the connector of the sectional view of Fig. Are shown. 4 Again shown the upper coupling part 9 and the lower coupling part 10, as well as the joint are 17. The plug 1 is plugged functional in the clutch 9.10, wherein the connecting cables are not shown for reasons of clarity. It can be seen in the plug 1, a strain relief 31 with the clamping screw 31 '. In the connector shell, the lock device 2 is located with its key 6 and the cam 7, which fit exactly in the form Sicherungseinkerbungen 16 in the clutch base 10 in the protective collar 11 and hold the plug. 1 Inside the key 6 is a cylindrical pressure spring 25 which is mounted on a support plate 26 and (indicated by dashed lines) to the side in a spring housing 23 is guided. The front side is located in the locking device 2, in which plate has a bore into which a guide bushing 18 projects, the part of a threaded bush 32, which serves the screw connection (after assembly) of the plug. 1 Behind the threaded bush 32, the upper part of a grounding screw 33 is visible, which engages in a grounding pin in the housing 35th Also visible is the longitudinal side of a sealing strip 34, which is described later.

Details of the locking device can be seen in FIG. A rounding 6 'is provided behind the button 6 which can be seen in a partial sectional view. A spring housing 23, which receives a pressure spring 25, cf. FIG. 4, is located in the interior of the button. In this respect, there are path restrictions 20 and side guides 22, which ensure a precise engagement and disengagement of the device in the plug upper part 1a. The two wedge-shaped cams 7 are mechanically connected via a central web 24, which serves as a stop for the travel limit.

FIG. 6 shows the plug upper part with the support plate 26 fastened by means of countersunk screws 28 as well as recesses 36 and 37, for the pins of the phase 4a and for the zero conductor 4b. In this view from below, the protruding sealing strip 34 can be seen, which in its double function also serves to center the lower plug part 1b. A further remote guide bush 18 is also shown with its bore 18 'for screwing the parts 1a and 1b. The guide bore 21, cf. FIG. 5, surrounds the guide bush 18 of the locking device, see FIG. 6, which additionally serves its vertical deflection. In addition, the side guides 22 of the locking device can be seen; Likewise, one half of an end-side cable lead-in 29 is shown in the plug part 1a.

7a to 7c show the torsion-free design of the support plate 26 by means of ribs 30 as well as the spring bearing 27 and the counters 28 "of the holes 28".

Analogous to the configuration of the protective collar according to FIG. 2 to FIG. 4, a recessed triple socket, with protective collar 38, FIG. 8, is provided. Protective gaps 16 are provided in the protective collar 38. Both conventional and plug 1 according to the invention can be inserted into this socket. Thus the subject of the invention is not proprietary.

[0027] The extraction force of the connector is largely determined by the shape of the cam 7 by the spring 25 determines. Thus, the extraction force is relatively easy to adjust by 180 ° rotated cam, but this requires the use of other materials and / or the plating of the respective sliding surfaces for the reduction of wear.

[0028] In principle, the subject invention can also adapt to connections of other countries, such as on German plug.

LIST OF DESIGNATIONS [0029] 1 connector (SEV type 12) 1a plug shell 1b plug lower part 2 the locking device 3 ground pin 4a phase (outer conductor) 4b neutral conductor 5 Isolation button 6 6 'rounding at 6 7 cam (wedge-shaped) 8 finger grip 1a 9 upper coupling part 10 coupling part 11 protective collar 12 finger grip 10 13 fluting 14 socket (phase) 15 bushing (zero conductor) 16 fuse notches 17 joint 9 to 10 18 guide sleeve 18 'hole 18 (screwing of 1a and 1b)) 20 travel limit (edge) 21 guide bore 22 side guides 23 spring housing 24 central web (stop) 25 pressure spring 26 support plate 27 spring bearing 28 fastening screws / countersunk screws 28 'mounting holes to 26 28 "countersink 29 cable passage 30 ribs (warp) 31 strain relief 31' clamping screw

Claims

32 Threaded connector (screwed connector) 33 Grounding screw 34 Sealing strip 35 Housing Grounding pin with connection bore 36 Recess for zero conductor 37 Recess for phase 38 Socket / protective collar Claims

Anspruch [en] A mechanical locking device for an electrical plug-in connection, characterized in that a spring-loaded locking device (2) protrudes from the plug upper part (1a) in the connector (1), which engages in protective collars (11; 38) of the coupling part (9, 10; And can be disengaged via a key (6).
2. The method according to claim 1, characterized in that the locking device (2) comprises at least one wedge-shaped cam (7) which engages positively into a notch (16) in the protective collar (11; 38).
3. The mechanical locking device according to claim 2, characterized in that the locking device (2) is integral and two cams (7), which are spaced apart from each other, protrude from the plug (1) on the front side and can be engaged orthogonally by the button (6) ,
4. The mechanical securing of an electrical plug-in connection according to claim 1, characterized in that the locking device (2) is designed as a rocker.
5. A mechanical fuse for an electrical plug-in connection according to claim 3, characterized in that a spring housing (23) with a cylindrical pressure spring (25) is provided in the pushbutton (6), in the interior thereof, on a supporting plate (26) Spring bearing (27).
6. The mechanical fuse of an electrical plug-in connection according to claim 4, characterized in that a leaf spring, which rests on a support plate (26) and disengages the button (6), is arranged in the rocker of the locking device (2).
7. The mechanical fuse of an electrical plug-in connection as claimed in claim 1, characterized in that a sealing strip (34), which engages in a groove provided in a lower connector part (1b), protrudes partially in the upper part of the plug (1a).
8. The mechanical fuse of an electrical plug-in connection as claimed in claim 5, characterized in that the support plate (26) is fixed in the upper plug part (1a) by means of countersunk screws (28).