FR2776842A3 - Spring arm contact element for plug-in connector - Google Patents

Abstract

The spring contact arm element (11) has a contact section (12) with at least two opposing contact spring arms (19) providing respective points of contact with the opposing surfaces (14) of a flat contact (13) and at least one spring, for increasing the contact force between the spring arm contact element and the flat contact, via at least one spring section (23) acting against the flat spring

Description

I State of the Art The invention relates to an arm contact element

  elastic which comprises a contact section which has at least two opposite elastic contact arms which can be brought into abutment by friction engagement to respectively form a point of contact on overlapping faces

  a contact tab and which comprises at least one res-

  overpressure spell to increase the holding force of the elastic arm contact element on the tongue

contact.

  Such a contact element with elastic arms is known

  tick by document DE-196 11 720 Ai; he is part of a

  connector, which is intended to be coupled with a connector

  opposite, the contact member with elastic arm being

  dark to make electrical contact on a surface of

connector contact opposite.

  The contact element with elastic arm has for this two elastic contact arms, which come in

  contact on the wide surfaces of the flat contact. To increase

  ter the pressing forces of the elastic contact arms

  these are supported by a spring exerting an overpressure.

  In aggravated operating conditions, such as for example when the element is exposed to tremors, it may however happen that the holding forces on the contact tongue are not sufficient even in the case where the dimension has been maximized. the elastic arms of

  contact and the springs exerting an overpressure, to suppress

  prevail by the friction engagement of relative movements in the direction of racking at the contact points, since these are in the case of covering surfaces with smooth, laminated surfaces

  These relative movements between the points of

  tact and the contact tab drive in an

  desirable in particular by corrosion due to friction,

  deterioration in the quality of contacts.

  Advantages of the invention The contact element with elastic arm, according to

  the invention is characterized in that the spring of surpres-

  sion has at least one elastic branch which can be supported on a lateral face of the contact tongue by friction engagement and with complementary shape. The contact element according to the invention thus has the advantage that the disadvantages mentioned can be avoided

above.

  For this, the contact element with elastic arm has a spring exerting an overpressure with at least two spring branches which face each other, and which are arranged at right angles to the elastic contact arms and can be put in place. with friction engagement and shape complementarity with the side faces

of flat contact.

  In this way, with a comparable dimensioning of the contact element with elastic arm, it is possible to increase its holding force on the contact tongue and avoid

  relative movements between the contact element with elastic arm

that and the contact tab.

  This has the consequence that the contact points

  remain free of corrosion due to friction and that the quality

  contact even under operating conditions

  unfavorable, such as shaking, remains

  naked. According to other characteristics of the invention:

  * the spring branch present on its free end res-

  pectively a blade which can be pressurized in stamping grooves of the contact tongue

  * the blade is placed at an angle on the side.

  Drawings The present invention will be described below

  in more detail from an exemplary embodiment shown

  tee in the accompanying drawings in which: - Figure 1 shows in an elevational view with a partial section a contact section of a contact element to

  elastic arm, element which is connected to a strap

  contact point, - Figure 2 shows in section in a front view, turned 90 relative to that of Figure 1, parts of the contact tongue and the contact member with elastic arm.

  Description of the exemplary embodiment

  In the case of the embodiment example,

  presented in FIG. 1, a contact section 12 of a contact element 11 with elastic arm, contact section 12 which is

  threaded onto a contact contact strip 13 for

sea an electrical connection.

  The contact tab 13 is part of a re-

  knife contact block, which has not been shown, this contact tab projecting through its free end, here shown, out of a contact carrier which receives it and here having substantially a cross section at

rectangular surface.

  The contact tab 13 is produced in the form of a stamping part, with covering faces 14, which face each other in parallel, smooth, laminated, on the wide sides and lateral faces 16, on the sides.

  narrow, arranged perpendicular to the previous ones.

  The side faces 16 are coarse due to the shear forces during the stamping process, at the

  opposite of the covering faces 14, and, as has been

  presented schematically and exaggerated in height to the fi-

  gure 2, they are provided with stamping grooves 17. The stamping grooves 17 extend substantially parallel to the longitudinal edges of the contact tongue 13. The contact section 12 of the contact element 11 with arms elastic has two opposite elastic contact arms 19 which extend in a manner not shown in their longitudinal course one over the other towards a contact zone and from there separate again to form a centering opening for the tongue

contact 13.

  The elastic contact arms 19 are curved convexly with respect to each other on their respective transverse path, so that the contact zone

  is reduced to a point-shaped area.

  If, as shown in FIG. 1, the elastic contact arms 19 are threaded onto the covering surfaces 14 of the contact tongue 13, it is

  then formed on the respective corresponding contact area-

  a point of contact 21 of punctual shape. Due to this point-like point of contact 21 on the surfaces

  cover beams 14 only forms can occur

  these weak holding elements of the arm contact element 11

  elastic, even with a large dimension of the elastic arms-

  contact ticks 19, and even when the contact forces of the elastic contact arms 19 are reinforced by forces

  additional springs pointing in the same direction.

  The contact element 11 with elastic arm therefore has, in addition to the elastic contact arms 19, a so-called overpressure spring 22 which, however, does not, as usual, support by spring branches

  23 on the elastic contact arms 19, but whose branches

  spring pins 23 are arranged offset with respect to

  port to the elastic contact arms 19, so

  that they apply by engagement by the respective force-

  ment on the lateral faces 16 and establish according to the

  gure 2, with the stamping grooves 17, respectively

  a complementarity of form which can be put in surpres-

  if we. For this, the free ends of the spring branches 23 are sharpened and here constituted like blades 24 or

  provided with at least one cutting edge geometry.

  The end zones of the spring branches 23 with the blades 24 are installed in an inclined manner on the

  lateral faces 16, to stabilize the connection between the element

  contact element 11 with elastic arm and the connecting tab

  tact 13 thanks to a position which preferably goes in a

direction of the type of a hook.

  With the holding force, which is reinforced by the complementary shape between the blades 24 of the spring branches 23 of the overpressure spring 22 and the grooves

  stamping 17 of the contact tongue 13 with respect to a simple friction engagement, it is possible to avoid having relative movements and the wear which results therefrom, 5 at the contact points 21 even in the event of shaking and hand-

  even under unfavorable operating conditions, maintain the quality of the contact between the contact element 11 with elastic arm and the contact tongue 13 over the entire period

  of operation of the electrical connection at a cons-

so much.

R E V E N DI C A T I ON S

  1) Contact element with elastic arm, which comprises a

  contact section (12) which has at least two elastic arms

  opposite contact ticks (19) which can be pressed into place by force engagement to respectively form a contact point (21) on covering faces (14) of a contact tab (13), and which comprises at minus one

  overpressure spring (22) to increase hand force

  of the contact element (11) with elastic arm on the contact tongue (13), characterized in that the overpressure spring (22) has at least one branch

  elastic (23) which can be supported on a side face

  rale (16) of the contact tongue (13) by engagement by

  strength and with a bond through form.

  2) Contact element with elastic arm according to the claim

  tion 1, characterized in that the spring branch (23) has on its free end respectively a blade (24) which can be pressurized

  in stamping grooves (17) of the connector tongue

tact (13).

  3) Contact element with elastic arm according to the claim

tion 2, characterized in that

  the blade (24) is placed in an inclined manner on the side face

rale (16).