DE2019885A1 - Spring contact set - Google Patents

Description

Applicant; Stuttgart, 2.3. April 1970

W. Gruner KG. ρ 2121 K / Kr

7209 Wehin gen / Württ.

SprinK contact set

The invention relates to a spring contact set, especially for power relays, where the switching spring that forms the moving contact half and the Performs switching movement, a pivotably mounted on an actuator, generating the jumping movement The coupling member engages pivotably about an axis running at right angles to the direction of movement of the actuating member Such a spring contact set is an example

, '■■■ ■■ ·. ν- - .- / ·

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wise described in DAS 1 055 128.

In many applications it is very desirable that the contacts resting on one another when opening or closing a sliding movement of the contact rivets in Exercise the direction of the contact plane on each other so that impurities, oxide layers and deposits are due be stripped of coarse or fine migration of the contact material and thus, with stronger currents,

"Contact welds by shear inevitably be separated. In relay contact spring sets, this problem has been solved so far by the fact that the movable Contact half against the resting contact half leading switching movement continued a little further is after the two contact rivets are already guided and the resting contact half on one Contact spring is attached so that the stationary contact half is resilient when the switching movement is continued backs away. Since the clamping points of the spring for the stationary contact half and the switching spring one Have a distance from each other, lead to this

) additional switching movement, the contact rivets a sliding movement on each other. This increase in the switching travel and also the arrangement of the stationary contact rivets on a spring and their deflection are undesirable in many cases. ¹ If the additional switching path becomes smaller and with it the deflection of the stationary contact spring, the sliding movement of the contact rivets on one another is very much reduced and these sliding paths then become so small that contact welds can no longer be separated with certainty. The smaller the sliding distance, the less effective the self-cleaning of the contacts becomes. After all, these arrangements

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voltages still have the disadvantage that with a creeping switching movement when lifting an arc relatively is maintained for a long time because the contact pressure is caused by the spring deflection of the stationary contact half goes relatively slowly towards zero.

The invention is based on the object of increasing the sliding movement of the contact rivets on one another, without having to accept the disadvantages mentioned.

The invention is based on the idea that with spring contact sets, So in which the actuator exerts a movement before the movable contact half moves and lifted from the adjacent contact is, this movement of the actuator, which has previously only been used to tension the spring, to use it to drive a sliding movement from her derive the contact rivets on each other. '

The invention consists in that the switching spring between the contact rivet and its clamping point or pivot axis designed to be resilient in the direction of its longitudinal axis is that the coupling element generating the jumping movement engages the portion of the switching spring which is on the side of the suspension facing away from the clamping or pivot axis, and that the coupling member is in the direction its points of attack on the neighboring parts have a harder spring characteristic than the suspension of the switching spring having.

Since the coupling element has a harder spring characteristic

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as the axial suspension of the switching spring, is when pivoting the actuator of his Rest position in that position in which the articulation points of the coupling link with the clamping point the switching spring lie in a line, in the form of the coupling link only slightly or, with a rigid coupling link, not changed at all. On the other hand, the switching spring is pushed together axially on this route, whereby this axial movement is absorbed by the suspension of the switching spring.

The advantage of the spring contacts remains, namely a sudden switch with an almost constant Switching time is fully retained even with gradual actuation. Welding of the contacts is certain separated. It can therefore also larger currents and powers with the smallest dimensions of the invention Contact set can be switched without incorrect switching. In addition, the large displacement causes a good self-cleaning of the contact members and thus a constant contact resistance.

The coupling member can be made of both an electrically conductive and an electrically non-conductive material be manufactured «, if it consists of an electrically conductive material, one can use this one lead a second current path for the contact.

The contact set can be designed both monostable and bistable.

In one embodiment of the invention, the axial Suspension of the switching spring by a bend or boring

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Crank of the switching spring formed, for example circular segment-shaped, in particular S-shaped or U-shaped may be, or have some other suitable shape can. The coupling member can by the known U-shaped, acting in the manner of a toggle lever Spring or be formed by a rigid section. .

The actuating member can be clamped in the same place as the switching spring and, in particular at Relay contact sets, extending beyond the contact rivets. The actuation member can also be on one of the clamping point of the switching spring opposite side pivotally mounted or clamped be. The use of the arrangement is not limited to relay spring sets, but can also be used for all other jump switches can be used.

In embodiments of the invention, the switching spring be formed from the central strip of a stamped part, the edge strips of which are parts of the rigid actuator form. This embodiment of the invention can do this be further designed that the edge strips in parallel to the direction of movement of the actuator running levels are bent. This increases the rigidity this edge strip increases in the direction of movement of the actuator.

The distance from each other can be greater than the corresponding expansion of the parts directly supporting the fixed contact rivets, so that in the end positions of the actuator

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the contacts protrude through the plane defined by the two strips. Also can actuator and switch spring be separately manufactured parts. The actuator can consist of metal or an insulating material.

Further features of the invention emerge from the following description of embodiments of the invention in connection with the claims and the drawing. The individual characteristics can be used for one or more can be realized in one embodiment of the invention.

Fig. 1 shows the plan view of an embodiment the invention,

Pig. 2 shows the side view of the embodiment shown in FIG. 1, the upper one Bar of the actuator is omitted,

Fig. 3 shows the plan view of a further embodiment of the invention and

FIG. 4 shows a view of this embodiment corresponding to FIG. 2.

Fig. 5 shows schematically the mode of operation of the arrangement.

In the embodiment of the invention shown in Figs. Ί and 2 are in an insulating part 1, the

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has a hole 2 used for fastening are Contact lugs 3 »4 and 5 pressed in, those with contact carriers 6 and 7 for the stationary contacts 8 and 9 and the switching spring 10 are in electrically conductive connection. The contact carriers 6 and 7 are up close the contact rivets 8 and 9 enclosed with insulating material.

The contact carriers 6 and 7 have an offset, see above that the distance between the contact rivets 8 and 9 is smaller than the distance between the contact carriers 6 and 7 in the vicinity the clamping point.

The switching spring 10 carries a changeover contact 11. An its free end is a coupling member 12 pivotally hung with the help of a nose 18, which is through a U-shaped spring spring is formed and the other End at 13 with the help of a hook 19 on the Actuator 14 is hinged in an articulated manner, on whose free end 15 attacks that link with which the Contact set is actuated.

The switching spring 10 has between contact rivets 11 and their restraint a circular segment-shaped bend or Crank 16, which allows a suspension of the switching spring 10 in the axial direction. The 16 The resilience caused by the switching spring 10 in the axial direction is softer than the resilience of the coupling member 12 in FIG the direction of the connecting line between its pivot points 13 and 17..

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The actuator 14 has side strips 20 and 21, which consist of strip-shaped material, the Plane parallel to the direction of movement of the switching spring runs. The strips 20 and 21 run on both sides of the switching spring 10 and connect the end piece 15 of the actuating member rigid with the part of the switching spring 10 adjacent to the clamping point. The resilient Parts 16 and 12 are under tension, which is taken up by strips 20 and 21. That under spring tension standing coupling member 12 presses in the one shown in FIG

'Position B by the horizontal component of the direction the connecting line between points 15 and 17 Force against the contact rivet 8. In its rest positions A and B, the actuating member 14 is pivoted out so far that that the contact rivets 8 and 9 enter the area between the two edge strips 20 and 21. If the actuator 14 from the position B in the When the position A is pivoted, the force component pressing the contact rivet 11 against the contact rivet 8 takes place until the line connecting the points 13 and with the clamping point of the switching spring 10 is aligned. After overcoming the friction, the switching spring then strikes

} 10 suddenly.

The embodiment shown in Figs the invention differs from the embodiment, form according to FIGS. 1 and 2 only in that Instead of a circular segment-shaped bend 16 in the switching spring 10, an S-shaped bend 22 is provided and that instead of a resilient one, a U-shaped one Spring spring formed coupling member a rigid coupling member 23 is provided. The insulating body 1 can with the help

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of the pin 24 · and recesses 25 are attached.

The rigid coupling member 23 is suitable at rope ends Shaped way, for example, it has V-shaped incisions 26 and 27, which ensure an articulated connection and the unhooking of the coupling member 23 impede. To fix the coupling member 23 laterally, recesses 27 or 28 provided,

FIG. 5 extends the mechanical principle of the invention and shows how the sliding movement in the axial direction of the switching spring 10 on the contact rivets 8 and 9 comes about. If the end 15 of the actuating member 14 is moved from the point B about the pivot point E to the point C, the spring F is compressed and the point D moves to D '. In the case of a rigid coupling member 12, the displacement movement is as large as the sum of the distances D, B and D ₁ E is greater than the distance E, B. If the coupling member 12 consists of a spring, the displacement is less by the spring travel of the coupling member 12.

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Claims (8)

- ΊΟ - claims 1. Springcontactsatζ, especially for power relays, the one on the switching spring, which forms the movable contact half and performs the switching movement, one on one Actuating member pivotally mounted, the jumping movement generating coupling member by a right angle to the direction of movement of the actuator engages extending axis pivotably, characterized in that the switching spring (10) between the contact rivets (11) and its clamping point or pivot axis is designed to be resiliently resilient in the direction of its longitudinal axis is that the coupling member (12, 23) acts on the portion of the switching spring (1O) on which the clamping or side of the suspension facing away from the pivot axis (16,22) lies, and that the coupling member (12, 23) seen in the direction of its points of application (13, 17) on the adjacent parts has a harder spring characteristic than the suspension (16, 22) of the switching spring (1O). 2. Contact set according to claim 1, characterized in that the axial suspension (16, 22) of the switching spring (10) is formed by a bend in the switching spring. 3. Contact set according to claim d, characterized in that the bend is S-shaped. 109847/0793 4. Contact set according to one of claims 1 to 3, characterized characterized in that the coupling member (25) is formed by a rigid part. 5. Contact set according to one of claims 1 to 3, characterized characterized in that the coupling member (16) in a known manner by a U-shaped like a Toggle spring acting is formed. 6 * contact set according to one of the preceding claims, characterized characterized in that the switching spring (.10) is formed from the central strip of a stamped part, the edge strip of which (20, 21) form parts of the actuator (). 7 «contact set according to claim 6, characterized in that the edge strips (20, 21) parallel to the direction of movement of the actuator extending planes are bent. 8. Contact set according to one of claims 6 or 7 »characterized in that the actuating member (10) has two strips (20, 21) laterally enclosing the switching spring, the spacing of which is greater than the corresponding extent of the fixed contact rivets (8, 9) directly bearing parts, so & aß in the end positions of the actuating member (14) the fixed contact rivets protrude through the plane defined by the two strips. 109847/0793 9 · Contact set according to claim 8, characterized in that that the actuating member (14) and the switching spring (10) are separately manufactured parts and the actuating member consists of an insulating material 109847/0793