DE102004021971B3 - Socket for electrical plug has socket cup containing baseplate with apertures for plug pins and fastening screw and has inclined surfaces pushed aside by pins to allow them to make contact - Google Patents

Abstract

The socket (1) to accommodate an electrical plug has a socket cup (2) which may be made of thermoplastic material. It has a large opening (3) and a small circular opening (4) in a base portion. It accommodates a baseplate (10) forming part of a protective assembly (9). There are two apertures (13) with inclined surfaces (30) underneath them. These surfaces are formed on a spring-loaded rotatable member and may be pushed aside by pins on an electric plug to allow them to make contact. A central aperture (15) may accommodate a fastening screw (33).

Description

The The invention relates to a socket insert of a socket with contact protection, in which a movable, spring-loaded safety slide introduced is what plug openings for the introduction from plug pins of a plug closes and these plug openings only with simultaneous engagement of both pins opens, wherein the socket insert provided in its bottom of the pot with a recess is, which serves to accommodate a separate contact protection unit, which the plug openings in its base plate and carrying the spring-loaded guard. The invention may, for example be used with flush-mounted sockets.

Such a socket insert a socket with contact protection is from the US 5,702,259 A known. In this case, the installation of the contact protection device on the bottom of the socket outlet insert takes place by means of laterally arranged locking means.

From the DE 24 02 569 B2 an electrical socket with locking device is known in which a movable, spring-loaded safety slide is inserted, which closes plug openings for the insertion of plug pins and these plug openings opens only with simultaneous engagement both plug-in starter. The slide is located in a front depression of the bottom of the socket cover.

From the DE 198 49 883 A1 an electrical socket with locking device is known in which a movable, spring-loaded safety slide is inserted, which closes plug openings for the insertion of plug pins and these plug openings opens only with simultaneous engagement both plug-in starter. Thus, the parental control even with the cover removed, so for example during installation or renovation work is effective, the child safety lock is mounted on the insulating base and covered with an insulating base held on the bottom of the cover cover plate.

From the DE 199 63 614 A1 an electrical socket with locking device is known in which a movable, spring-loaded safety slide is inserted, which closes plug openings for the insertion of plug pins and these plug openings opens only with simultaneous engagement both plug-in starter. The locking device is arranged on the back of the socket insert.

From the EP 0 771 051 A1 an electrical socket with locking device is known in which a movable, spring-loaded safety slide is inserted, which closes plug openings for the insertion of plug pins and these plug openings opens only with simultaneous engagement both plug-in starter. The locking device is located in the pot bottom of the socket insert.

In the DE 101 48 287 A1 is proposed a contact protection device for a socket insert a protective contact socket, wherein on the back of the socket insert a contact protection lower part is formed, in which a spring-loaded slide is introduced, which closes the introduced in the socket insert plug openings for the insertion of plug pins of a plug and these plug openings only with simultaneous engagement of both pins opens. As a return spring of the safety slide is a leaf spring, which is movably disposed between the inner wall of the contact protection base and the protective slide.

Of the Safety slide is designed as a rotary valve, which via his Central bore rotatable on a central in the contact protection lower part located pin is placed. The safety slide has as inclined planes trained engagement troughs for the engagement of the connector pins on. The protective slide has at least one cam over which he tilts at one-sided load only a plug opening so, that a peripheral side of the engagement recesses arranged offset Edge engages in the not acted on by the connector pin connector opening and locked there. A snap-on contact protection cover is used for Closure of the contact protection device, wherein this contact protection cover plug openings for the Having plug pins.

Of the Invention is based on the object, a socket insert a Socket with contact protection specify the type mentioned above, which highest strength requirements is justified.

These The object is achieved in conjunction with the features of the preamble according to the invention solved specified in the characterizing part of claim 1 features.

The advantages achieved by the invention are in particular that the proposed socket insert a socket with contact protection different materials (electrical insulating plastics) for the socket insert on the one hand and the contact protection on the other hand can be used, wherein in the choice of material for the socket insert z. As the cost of materials, the scratch resistance of the surface and the resistance to chemicals are in the foreground and in the choice of material for contact protection - especially its base plate - z. B. the strength, stiffness and hardness are crucial. Duroplast in particular is advantageous as the material for the socket insert, and in particular polycarbonate is advantageous as the material for the base plate of the contact protection module. The contact protection can be advantageously produced in a very high series, as it is universally usable for socket inserts with different design and different color. This leads to considerable cost savings in the production.

Further Advantages will be apparent from the following description.

advantageous Embodiments of the invention are characterized in the subclaims.

The Invention will be described below with reference to the drawing Embodiments explained. It demonstrate:

1 a view of the front of a socket insert with pre-assembled, but not yet used contact protection assembly,

2 a view of the back of a socket insert with pre-assembled, but not yet used contact protection assembly,

3 essential building components of a contact protection unit,

4 a view of the interior of a cap.

In 1 is a view of the front of a socket insert with pre-assembled shock protection assembly shown before assembly. An essential feature of the invention is that in the bottom of the pot 2 of z. B. Duroplast existing socket insert (C-disc) 1 a recess 3 is provided, which for the integration / assembly of a pre-assembled contact protection assembly 9 with base plate 10 serves, with the attachment of the unit 9 on the bottom of the pot 2 over two opposite, edge-side locking connections takes place. In the perspective view according to 1 is only a detent opening 4 of two detent openings 4 . 5 of the pot bottom 2 and only a latching tongue 12 of two at the back of the base plate 10 molded locking tongues 11 . 12 to recognize.

• • aus einer z. B. aus Polycarbonat bestehenden Basisplatte 10 (selbstverständlich sind auch andere Materialien, z. B. ein Polyamid verwendbar),
• • aus einer an der Rückseite der Basisplatte 10 befestigten Abdeckkappe 18 (siehe hierzu 3 und 4),
• • aus einem im Innenraum zwischen Basisplatte 10 und Abdeckkappe 18 eingelegten Drehschieber 26 (siehe hierzu 4) und
• • aus einer Schraubenfeder als Rückstellfeder für den Drehschieber 26 (siehe hierzu 4).

The contact protection unit 9 exists in principle

• • from a z. B. polycarbonate base plate 10 (Of course, other materials, eg a polyamide can also be used),
• • one on the back of the base plate 10 attached cap 18 (see also 3 and 4 )
• • one in the interior between the base plate 10 and cap 18 inserted rotary valve 26 (see also 4 ) and
• • from a coil spring as return spring for the rotary valve 26 (see also 4 ).

Of course, the base plate 10 with two plug openings 13 provided for the passage of plug pins of a plug. In these plug openings 13 are inclined surfaces 30 (Engaging recesses, inclined planes) of the rotary valve 26 to recognize on which the plug pins put on, whereby the contact protection is brought from the closed to the open position. In the center of the base plate 10 there is an internal bore 15 through which a fastening screw 33 engages, reducing the mechanical connection between socket insert 1 including protection against contact and a (not shown) socket socket (with corresponding threaded hole for engagement of the fastening screw) takes place.

In 2 is a view of the back of a socket insert with pre-assembled contact protection assembly shown before assembly. As a result of the recess 3 in the bottom of the pot 2 Although there is a weakening of the mechanical strength of the socket receptacle of the socket insert 1 However, this is offset by placing on the back of the pot bottom 2 several - in the embodiment four - ribs 7 formed, which, for example, starting from the outer corners of the socket insert to the edge of the recess 3 extend. More ribs 8th surround the openings for the passage of a grounding strap. Finally, all around the above-mentioned detent openings are all around 4 . 5 a reinforcing ring 6 formed.

At the back of the base plate 10 the pre-assembled contact protection assembly 9 are the to engage in the detent openings 4 respectively. 5 serving latching tongues 11 respectively. 12 clearly visible. The cap 18 generally consists of a base plate 19 , to which a side wall around 24 is molded, which in the assembled state behind one on the base plate 10 molded side wall 17 attacks. The contours of the recess 3 in the bottom of the pot 2 and the side wall 17 are attached to each other fits. Of course, the cap is 18 with plug openings 20 provided, which with the plug openings 13 the base plate 10 correspond. Furthermore, the cap 18 a central inner bore 22 on, which correspond to the central inner bore 15 the base plate 10 is and to carry out the already mentioned fastening screw 33 serves.

In 3 are essential components of a contact protection unit 9 shown, wherein the rotary valve and the coil spring already within the cap 18 are located and therefore not shown. It is good to see that the contours of the side wall 17 the base plate 10 and the edge of the bottom plate 19 molded side wall 24 the cap 18 adapted to each other, that the cap 18 after assembly, twist-proof inside the side wall 17 is fixed. The two required for mounting on the socket insert locking tongues 11 . 12 are outside of through the side wall 17 bounded inner area of the contact protection. To those already mentioned above, centrally between the plug openings 13 arranged, for carrying out the fastening screw 33 serving inside bore 15 the base plate 10 is a central hollow pin 14 arranged, which end on its inner wall a detent 16 having an inclined surface.

In 4 is a view of the interior of a cap shown. The cap 18 has to hold an inserted rotary valve 26 at least two noses 25 on which at the top of the side wall 24 are formed. The rotary valve 26 consists of an annular main body 27 , on which two side arms 28 . 29 are formed in the closed position, the plug openings 13 the base plate 10 close. At her the plug openings 13 facing upper side, the side arms 28 . 29 each under 1 already mentioned inclined surfaces 30 for engaging the plug pins of a plug, each inclined surface opens into a stepped edges. With one-sided load the rotary vane teeters 26 not shown cam and one of the stepped edges engages in the associated connector opening 13 the base plate 10 which prevents opening of the contact protection. At the side arm 29 is a recording 31 for locking the acting as a return spring coil spring 32 molded, wherein the coil spring on the other hand on the side wall 24 supports and tries the rotary valve 26 to press in the closed position of the contact protection.

For fastening the cap 18 on the base plate 10 has the cap 18 one central to its bottom plate 19 molded, slotted hollow pin 21 with internal bore 22 for the introduction of the fastening screw 33 on. End side, the hollow pin 21 a circumferential, outwardly projecting latch 23 with an inclined surface, which in the corresponding inner bore 15 the base plate 10 engages, causing the locking lugs 16 and 23 lock.

The thus pre-assembled contact protection assembly 9 will be in a later assembly step in the socket insert 1 pressed in until the locking tongues 11 . 12 in the detent openings 4 . 5 "Clipped".

As from the above explanations, The safety gate automatically shields the live circuit Contacts as soon as the plug is pulled out of the socket becomes. The spring pushes then put the safety gate in the protective position. When inserting a suitable connector is the contact protection over the Sloping surfaces (crooked Levels) and the pins come with the live contacts of the socket base in touch. However, if a single pin is inserted into the socket, the tilts Slide, thereby locked in the closed position and thus prevents manipulation of the socket, which is the electrical Endanger the safety of persons.

The contact protection with rotary valve described above is merely an example, ie, it is of course also possible other types of protection against contact, for example, longitudinal slide variants (linear slide), which in the same way on their base plate on the bottom of the pot 2 of the socket insert 1 are mounted.

1

socket insert (C-washer)

2

pot base

3

recess

4

latching opening

5

latching opening

6

reinforcement ring

7

rib

8th

rib

9

Contact protection assembly

10

baseplate

11

catch tongue

12

catch tongue

13

plug openings

14

centrally hollow pin

15

internal bore

16

locking lug with beveled surface

17

sidewall

18

cap

19

baseplate

20

plug openings

21

central, slotted hollow pin

22

internal bore for the introduction a fixing screw

23

projecting Latch with oblique surface

24

sidewall

25

nose for holding the rotary valve

26

rotary vane

27

Main body in Shape of a ring

28

sidearm

29

sidearm

30

Inclined surface for plug pins

31

admission for spring

32

coil spring as a return spring

33

fixing screw

Claims (10)

Socket insert of a socket with contact protection, in which a movable, spring-loaded safety gate ( 26 ), which plug openings ( 13 ) for insertion of plug pins of a plug and opens these plug openings only with simultaneous engagement of both pins, the socket insert ( 1 ) in its bottom ( 2 ) with a recess ( 3 ), which for receiving a separate contact protection assembly ( 9 ), which the plug openings ( 13 ) in its base plate ( 10 ) and the spring loaded safety gate ( 26 ) carries, characterized . that the contact protection unit ( 9 ) over its base plate ( 10 ) on the bottom of the pot ( 2 ) is attachable by means of mounting means, including on the base plate ( 10 ) of the touch guard assembly ( 9 ) at least two marginal locking tongues ( 11 . 12 ) are formed, which for mounting in corresponding detent openings ( 4 . 5 ) of the recess ( 3 ) in the bottom of the pot ( 2 ) of the socket insert ( 1 ) intervene. Socket insert according to claim 1, characterized in that at the back of the socket insert ( 1 ) Ribs ( 7 . 8th ) for reinforcing the pot bottom ( 2 ) are provided. Socket insert according to claim 1, characterized in that at the back of each latching opening ( 4 . 5 ) a reinforcing ring ( 6 ) is provided. Socket insert according to one of the preceding claims, characterized in that the base plate ( 10 ) of the touch guard assembly ( 9 ) a central inner bore ( 15 ) for the passage of a fastening screw ( 33 ), which on the other hand engages in a threaded bore of a socket base. Socket insert according to claim 4, characterized in that a central hollow pin ( 14 ) of the base plate ( 10 ) the inner bore ( 15 ), which on its inner wall a circumferential latching lug ( 16 ) with an inclined surface. Socket insert according to one of the preceding claims, characterized in that a cap ( 18 ) on the back of the base plate ( 10 ) of the touch guard assembly ( 9 ) and to the base plate ( 10 ) corresponding plug openings ( 20 ) and a central inner bore ( 22 ) having. Socket insert according to claims 5 and 6, characterized in that the cap ( 18 ) a central, slotted hollow pin ( 21 ), which has a projecting nose ( 23 ) has an inclined surface and that the slotted hollow pin ( 21 ) in the hollow pin ( 14 ) of the base plate ( 10 ) engages latching. Socket insert according to claim 6 and / or 7, characterized in that the cap ( 18 ) a bottom plate ( 19 ) with molded-on side wall ( 24 ), whose shape to the shape of the side wall ( 17 ) of the base plate ( 10 ) is adjusted. Socket insert according to one of the preceding claims, characterized by the use of a rotary valve ( 26 ) as a safety gate. Socket insert according to one of the preceding claims, characterized through the use of a longitudinal slide as a safety gate.