DE202009012913U1 - strain relief - Google Patents

Abstract

Strain relief unit (3) with a securing section (4) for absorbing tensile forces on electrical conductor or plug connectors and with at least one latching finger (5) projecting from the securing section (4) for latching into a conductor connection terminal (1), which has at least one receiving shaft (7 ) for in each case one associated latching finger (5), wherein the latching fingers (5) each have at least one of a free end of the latching finger (5) in the direction of securing portion (4) rejecting, resiliently mounted latching legs (10).

Description

The The invention relates to a strain relief unit with a securing portion for absorbing tensile forces on electrical conductors or connectors and with at least one of the Zugentlastungseinheit away Snap finger for locking in a conductor terminal, the at least a receiving shaft for each associated latch finger has, wherein the latching fingers each one of a free end of the Rastfingers in the direction of securing section rejecting, have spring-loaded locking legs.

Strain for connectors are in various embodiments known from the prior art.

DE 20 2006 014 893 U1 discloses a connector with strain relief. An attachable to a connector strain relief element has lead-through openings for a cable for fixing and making a insulation displacement contact.

DE 10 2008 000 479 A1 discloses a plug-in device with strain relief, which has a can be pressed with a union rotary sleeve to a conductor terminal.

DE 199 33 834 A1 describes a connector with receiving slots for a plug, which is chert by a locking cap in the connector housing gesi. The locking cap is inserted into an opening of the plug housing and locked there.

DE 34 02 919 C2 discloses a strain relief for an electrical connector which is attached to a ring member by means of a union nut on the connector.

From the DE 42 29 724 C1 a strain relief device for multi-pin connector is known, which is designed in the form of a frame. The frame has a mounting plate having holes to screw the strain relief device to a connector by means of mounting screws.

outgoing From this it is an object of the present invention to provide an improved Strain relief to create the smallest possible is and with low latching forces in a conductor terminal can be latched and in the locked state high tensile forces can record.

The Task is with the strain relief of the aforementioned Art solved by that of the security section protruding locking fingers in each case at least one of a free end the latching finger in the direction of securing section rejecting, have spring-loaded locking legs.

In contrast to DE 42 29 724 C1 the locking of the strain relief unit is proposed by means of spring-mounted locking legs. Such in the direction of securing portion rejecting movable locking legs have low latching forces and are able to withstand high Abrastkräften or tensile forces acting on the Zugentlastungseinheit.

such resiliently mounted locking legs require only a small Space, so that the strain relief unit with the conductor terminal small is.

One Advantage of the strain relief unit according to the invention is that the strain relief unit also after installation of the conductor terminal can be retrofitted in a housing.

Especially It is advantageous if the latching fingers transverse to the spring direction, in which the locking legs are resiliently deflectable, from the top and / or the underside of the locking fingers have projecting locking lugs. To this Way is another position securing the strain relief unit provided transversely to the spring direction of the locking legs.

These Locking lugs are preferably in the direction of the securing portion raising ramp, so that the locking fingers when inserting in a receiving shaft of the conductor terminal continuously increasingly a deformation force on the subsequent to the latch finger Wall of the receiving shaft exercises until the latch finger in a corresponding opening in the wall of the receiving shaft dips and locked with this. This will be the insertion the locking finger in the respective receiving shaft with reasonable Force required.

Especially It is advantageous if the latching fingers opposite for spring-loaded locking leg a ramp with a Stop, with the ramp from the backup section towards the free end of the latching finger tapers and for locking on a corresponding stop in the receiving shaft a conductor terminal is provided.

With the help of this stop finger opposite the stop ramp further securing the strain relief unit is achieved. The locking finger acting in opposite directions and ramp of a locking finger together secure the strain relief unit even with a possible Ver shift or tilt in the receiving shaft.

Advantageous is there when the stop of the ramp is about at the level the stop of the locking lug of the same locking finger is when Auflauframpe and latch are combined on a latch finger.

Farther It is particularly advantageous if the locking leg a Rastanschlagfläche has, which is arranged closer to the securing portion than the Stops on the opposite ramp and / or the at least one latch.

On This way it is achieved that when inserting the locking finger in a receiving shaft initially only the latch finger his spring force is bent back and just before the end the latching process, the resistance forces of the ramp then take effect when the on the spring-mounted locking legs effective lever arm largest and thus the necessary Leverage is lowest. Overall, this results a reduction and equalization of the insertion force.

Of the Locking finger is preferably integral with the securing portion shaped. Securing portion and locking fingers are preferred manufactured as a plastic element, for example by injection molding.

Advantageous is also when the catch finger is plate-shaped and one has much smaller thickness than width and length. The Width of the locking finger is in the spring direction of the locking legs and the length in the insertion or extension direction the latching finger away from the securing portion to the free end of the latching fingers Are defined.

The The invention will be described below with reference to the accompanying drawings explained in more detail. Show it:

1 - Side view of a conductor terminal with associated strain relief in not yet engaged state;

2 - Side sectional view of the conductor connection terminal with strain relief unit off 1 in the state of insertion of the strain relief unit;

3 - Conductor terminal with strain relief unit off 1 and 2 in the locked state of the strain relief unit;

4 - Sectional perspective view of the Zugentlastungseinheit in the region of the latching fingers;

5 - Sectional view of the receiving shaft of a conductor connection terminal with not yet introduced associated latching fingers of a strain relief as a plan view;

6 - Sectional view of the conductor connection terminal with strain relief unit off 5 in the state at the beginning of the insertion of the locking finger in the associated receiving shaft;

7 - Sectional view of the conductor connection terminal with strain relief unit off 5 and 6 in latched state of the latch finger.

1 leaves a side view of a conductor terminal 1 Detect that in a device housing 2 , For example, a housing plate of a lamp is installed. The conductor connection terminal 1 is intended for connecting conductors either directly or with the help of male or female elements. When on the to the conductor terminal 1 connected conductor is exercised, the plug connection of the conductors with the conductor connection terminal 1 to solve. Therefore, a strain relief unit 3 provided, which is connected to the conductor or a plug / socket element and is to receive the tensile forces exerted on the electrical conductors to be connected. The strain relief unit 3 has a backup section for this purpose 4 to which the electrical conductor or male connector (not shown) is attached. On a front side of the fuse section in the direction of the conductor connection terminal 1 is at least a latch finger 5 provided by the security section 4 protrudes and for insertion into a receiving shaft of the conductor terminal 1 and latching is provided in the receiving shaft.

In the illustrated embodiment, another securing finger protrudes 6 from the security section 4 in the direction of the conductor connection terminal 1 at a distance from the latch finger 5 protruding, the strain relief unit 3 further secures in particular from tilting down.

The strain relief unit 3 will be in the in 2 from the cross-sectional view recognizable receiving shaft 7 inserted.

In the fully inserted state of the detent finger 5 in the receiving shaft 7 locks the latch finger 5 with the help of several locking elements.

Out 3 is a latching nose in the cross-sectional view 8th recognizable, one towards the security section 4 having increasing ramp. When inserting the latch finger 5 in the receiving shaft 7 the conductor connection terminal 1 becomes the catch 8th applying a force causing elastic deformation to a wall portion 9 the conductor connection terminal 1 in front moved up to a free space in which the latch 8th a stop to the wall section 9 provides and the latch finger 5 in this way in the receiving shaft 7 locked.

4 leaves a perspective top view of the strain relief unit 3 out 1 to 3 detect. It becomes clear that two locking fingers 5 are provided at a distance from each other and extending parallel to each other. The catch fingers 5 each have the locking lugs already described above 8th at the top of the plate-shaped latching fingers 5 ,

Furthermore, spring-mounted locking legs 10 provided, extending from one in the free end of the latch finger 5 formed spring bow 11 starting in the direction of the securing section 4 extend back with their free end. That to the security section 4 pointing free end 16 (Stop surface) of the resiliently mounted locking legs 10 forms a stop for securing and locking the strain relief unit 3 at the conductor connection terminal 1 ,

In the illustrated embodiment, the two locking legs of juxtaposed latching fingers spring 5 in opposite, facing each other direction.

Opposite to the locking leg 10 a latch finger 5 is a ramp 12 with a stop 15 intended. The ramp 12 tapers from the fuse section 4 towards the free end of the catch finger 5 to introduce the latch finger in this way 5 in the receiving shaft 7 the conductor connection terminal 1 to facilitate. The stop 15 the ramp 12 serves for locking on a corresponding stop 13 (visible in the 5 - 7 ) in the receiving shaft 7 the conductor connection terminal 1 ,

Furthermore, it is off 4 recognizable that the width of the latch finger 5 from the area of the free end of the locking leg 10 to the security section 4 increases.

The catch finger 5 This is achieved by three independently acting stops in the receiving shaft 7 the conductor connection terminal 1 secured. There are locking legs 10 , Catch 8th and ramp 12 aligned in different directions, with locking legs 10 and ramp 12 arranged opposite and the catch 8th oriented transversely to this.

Optionally, in addition to the catch 8th on the top of the latch finger 5 also alternatively or additionally a detent 8th at the bottom of the latch finger 5 be provided.

5 to 7 let the mechanism of action of the latch finger 5 when inserting and snapping into the receiving shaft 7 a conductor connection terminal 1 recognize from the top view.

5 leaves a section of the conductor connection terminal 1 in the area of the receiving shaft 7 detect. It becomes clear that in the receiving shaft 7 a to the ramp 12 corresponding stop 13 and also provided with a ramp ramp locking leg stop 14 is available.

The catch finger 5 is in the 5 state not yet shown in the receiving shaft 7 inserted. Clearly visible are acting in different directions stop means in the form of the locking leg 10 , the catch nose 8th and the ramp 12 ,

6 indicates that when inserting the locking finger 5 in the receiving shaft, first the locking leg stop 14 in the receiving shaft 7 takes effect. By interaction of the locking leg stop 14 with the spring-mounted locking leg 10 becomes the locking leg 10 pressed down. The passage width is continuously through the opposite sloping ramp 12 reduced. Due to the staggered arrangement of the ramp 12 and the free end of the locking leg 10 increases with increasing reduction of the passage width, however, the lever arm of the force action of the locking leg stop 14 on the locking leg 10 , whereby the insertion force is kept approximately constant. Just before reaching the in 7 shown latching position must be the ramp 12 only the corresponding stop 13 overcome. As a result, on the one hand secures the stop surface 16 of the locking leg 10 together with the corresponding locking leg stop 14 on the one side and opposite the ramp 12 together with the corresponding stop 13 the catch finger 5 in the receiving shaft 7 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 202006014893 U1 [0003]
• DE 102008000479 A1 [0004]
• - DE 19933834 A1 [0005]
• - DE 3402919 C2 [0006]
• - DE 4229724 C1 [0007, 0010]

Claims (9)

Strain relief unit ( 3 ) with a security section ( 4 ) for receiving tensile forces on electrical conductors or connectors and at least one of the fuse portion (10). 4 ) protruding latch fingers ( 5 ) for latching in a conductor terminal ( 1 ), which has at least one receiving shaft ( 7 ) for each associated latch finger ( 5 ), wherein the latching fingers ( 5 ) at least one of a free end of the latching finger ( 5 ) in the direction of the security section ( 4 ) rejecting, resiliently mounted locking legs ( 10 ) to have. Strain relief unit ( 3 ) according to claim 1, characterized in that the latching fingers ( 5 ) transversely to the spring direction, in which the locking legs ( 10 ) are resiliently deflectable, from the top and / or the bottom of the latching fingers ( 5 ) projecting locking lugs ( 8th ) to have. Strain relief unit ( 3 ) according to claim 2, characterized in that the latching noses ( 8th ) one towards the security section ( 4 ) have rising ramp. Strain relief unit ( 3 ) according to one of the preceding claims, characterized in that the latching fingers ( 5 ) opposite to the spring-mounted locking leg ( 10 ) a ramp ( 12 ) with a stop, whereby the ramp ( 12 ) from the security section ( 4 ) towards the free end of the latch finger ( 5 ) and latched to a corresponding stop in the receiving shaft of a conductor terminal ( 1 ) is provided. Strain relief unit ( 3 ) according to claim 4, characterized in that the stop of the ramp ( 12 ) approximately at the level of the stop of the detent ( 8th ) of the same latch finger ( 5 ) lies. Strain relief unit ( 3 ) according to one of the preceding claims, characterized in that the locking leg ( 10 ) has a Rastanschlagsfläche closer to the security section ( 4 ) is arranged as the stops of the detent ( 8th ) and / or the ramp ( 12 ) of the same latch finger ( 5 ). Strain relief unit ( 3 ) according to one of the preceding claims, characterized in that the at least one latching finger ( 5 ) one integral with the securing portion ( 4 ) manufactured plastic element. Strain relief unit ( 3 ) according to one of the preceding claims, characterized in that the at least one latching finger ( 5 ) is plate-shaped. Strain relief unit ( 3 ) according to one of the preceding claims, characterized in that at a distance from the at least one latching finger ( 5 ) a safety finger ( 6 ) from the security section ( 4 ) in the direction of the conductor connection terminal ( 1 ) protrudes.