DE102022115926A1 - Electrical double contact element with touch protection - Google Patents

Abstract

The invention relates to an electrical contact system, consisting of a first double contact element (1) and a second double contact element (2), wherein the double contact elements (1, 2) each have a contact area (KB, KB') with a socket and pin-like contact means.

Description

The invention is based on an electrical contact system according to the preamble of independent claim 1. The invention further relates to a connector system in which such contact elements are used.

Such contact elements are used for high-current applications and in particular for supplying energy to transformers or for coupling battery systems.

State of the art

The WO 2019/219126 A1 shows a connector for high-current use. For higher energy transfer, two contact elements must be bridged together. The size of such contact elements is adapted to the respective area of application. Different contact elements are usually used for different areas of application.

Task

The object of the invention is to propose a contact system which can transport higher currents and at the same time can be used safely.

The task is solved by the subject matter of independent claim 1.

Advantageous embodiments of the invention are specified in the subclaims and the following description.

The electrical contact system according to the invention consists of two double contact elements, namely a first double contact element and a second double contact element.

The double contact elements each have a contact area. In the contact area, the two double contact elements are in contact for electrical power or energy transmission. According to the invention, two different contact areas are formed between the double contact elements. There is an internal and an external contact area, each of which is described in more detail below.

The contact areas of the double contact elements each have a socket-like and a pin-like contact means. In this case, socket-like contact means means that the contact means is designed to receive and electrically contact a pin-like mating contact element. According to the invention, a pin-like contact means is understood to mean a contact means that can be inserted into a socket-like area and creates electrical contact therein or with it.

The contact areas of the double contact elements are preferably designed to complement one another. This allows the double contact elements to be plugged into one another.

Preferably, the double contact elements are each designed to be substantially cylindrical or have a substantially cylindrical cross section. Such double contact elements can be made from solid material using machining steps. Only through a massive choice of materials (a lot of material) can the desired high current carrying capacity be achieved. A contact element that is made from flat material using stamping and bending technology is not able to transmit the desired high currents.

Preferably, the contact area of the first double contact element has axially projecting, circumferential contact lamellae on the outside. The contact blades are preferably formed by making an axial, annular hole or cutout in the solid material and then providing the resulting outer surface with axially extending slots, preferably at the same distance from one another. On the inside, the first double contact element has an axially projecting contact pin.

Advantageously, the inner contact pin of the first double contact element has a contact protection on its leading contact tip. The contact protection consists of a non-electrically conductive material, for example plastic. This increases the safety of a connector in which this double contact element is used.

Preferably, the contact area of the second double contact element has a circumferential lateral surface on the outside. In this area, the double contact element is solid and essentially has a solid material cross section (a lot of material in this area). In any case, the lateral surface does not simply represent the lateral surface of a hollow cylinder. In this form, the lateral surface takes on the function of a contact pin. On the inside, the second double contact element has axially projecting, circumferential contact lamellae.

The contact lamellae of the second double contact element are those described above However, the lateral surface is only minimally and/or partially enclosed. The contact blades of the second double contact element protrude further than the lateral surface when viewed in the plugging direction. As a result, the contact lamellae of the second double contact element are designed to lead in relation to the lateral surface in the plugging direction and thereby offer guidance during the plugging process.

Preferably, the contact lamellae of the second double contact element are surrounded on the outside by a contact protection. The contact protection consists of a non-electrically conductive material, preferably plastic. This increases the safety of a connector in which this double contact element is used.

Advantageously, the contact blades of the first double contact element and the contact blades of the second double contact element each have a radially inwardly directed thickening at their ends. Taken together, the individual thickenings each form a circumferential, inwardly directed bulge or bulge. Electrical contact with the plug-in partner is essentially established via this thickening or bead.

In the contact system according to the invention, both plug partners, i.e. the first and the second double contact element, each have contact protection. This means that the respective double contact elements can be made significantly more solid. The distance between the respective internal contact means and the external contact means can thereby be significantly increased. As a result, the contact system according to the invention can transmit higher currents overall.

The double contact elements mentioned above are used in connector systems. Such a connector system consists of a first connector and a second connector, with at least one electrical contact system according to one of the preceding claims being used in the connector system.

Example embodiment

• 1 eine perspektivische Darstellung eines ersten Doppelkontaktelements,
• 2 eine perspektivische Darstellung eines zweiten Doppelkontaktelements und
• 3 eine perspektivische und geschnittene Darstellung eines Steckverbindersystems, in welchem die erfindungsgemäßen Doppelkontaktelemente eingesetzt werden.

An exemplary embodiment of the invention is shown in the drawings and is explained in more detail below. Show it:

• 1 a perspective view of a first double contact element,
• 2 a perspective view of a second double contact element and
• 3 a perspective and sectional view of a connector system in which the double contact elements according to the invention are used.

The figures contain partly simplified, schematic representations. In some cases, identical reference numbers are used for identical but possibly not identical elements. Different views of the same elements could be scaled differently. Directional information such as “left”, “right”, “up” and “down” are to be understood with reference to the respective figure and can vary in the individual representations compared to the object shown. In the following, “outside” means further away from the main axis of symmetry of the body and “inside” means closer to the main axis of symmetry of the body.

The double contact elements 1, 2 of the contact system according to the invention are brought together in the so-called plug-in direction SR and plugged together. In the 1 and 2 The plugging direction SR is shown by an arrow.

The 1 shows a perspective view of a first double contact element 1. The first double contact element 1 is essentially cylindrical. The first double contact element 1 has a contact area KB on the plug-in side, which is formed from circumferential contact lamellae 3 which project axially on the outside. The contact lamellae 3 can also be referred to as a contact ring or socket ring. The contact blades 3 are, as already described in more detail above, machined from a solid material in a machining process. On the inside, the first double contact element 1 has an axially projecting contact pin 4 running along the main axis of symmetry of the first double contact element 1.

The internal contact pin 4 of the first double contact element 1 has a contact protection BS on its leading contact tip. The touch protection BS is only in 3 to see and in 1 not shown. In 1 only the metal component of the first double contact element 1 can be seen. The contact protection BS is made of a non-electrically conductive plastic and is preferably applied using an injection molding process.

In 2 a perspective view of a second double contact element 2 can be seen. The contact area KB 'of the second double contact element 2 has a circumferential lateral surface 5 on the outside. Below this lateral surface there is largely solid material. On the inside, the contact area KB 'has axially projecting, circumferential contact lamellae 6.

The contact blades 6 of the second double contact element 2 are - viewed in the plugging direction SR - arranged in advance relative to the lateral surface 5. This means that initially the contact blades 6 of the second double contact element 2 are in contact with the contact pin 4 of the first double contact element 1 before the lateral surface 5 of the second contact element 2 is contacted with the contact blades 3 of the first double contact element 1.

The contact blades 6 of the second double contact element 2 are surrounded on the outside by a contact protection BS '. The contact protection BS' is made of a non-electrically conductive plastic and is preferably applied in the injection molding process. The touch protection BS' is only in 3 to see and in 2 not shown. In 2 only the metal component of the second double contact element 2 can be seen.

In the 1 and 2 It can be clearly seen that both the contact blades 3 of the first double contact element 1 and the contact blades 6 of the second double contact element 2 each have a radially inwardly directed thickening 7 at their ends.

In 3 the double contact elements 1, 2 are shown in the plugged state. It can be clearly seen that the double contact elements form two separate contact areas with each other.

In 3 A connector system is further shown, which is formed from a first connector SV1, in which a first double contact element 1 is arranged, and a second connector SV2, in which a second double contact element 2 is arranged.

Reference symbol list

1

First double contact element

2

Second double contact element

3

Contact lamellas of the first double contact element 1

4

Contact pin of the first double contact element 1

5

Lateral surface of the second contact element 2

6

Contact lamellas of the second double contact element 2

7

thickening

KB

Contact area of the first double contact element 1

KB'

Contact area of the second double contact element 2

B.S

Touch protection of the first double contact element 1

BS'

Touch protection of the second double contact element 2

SV1

First connector

SV2

Second connector

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2019219126 A1 [0003]

Claims (10)

Electrical contact system, consisting of a first double contact element (1) and a second double contact element (2), the double contact elements (1, 2) each having a contact area (KB, KB') with a socket and pin-like contact means. Electrical contact system Claim 1 characterized in that the contact areas (KB, KB') of the double contact elements (1, 2) are designed to complement each other. Electrical contact system according to one of the preceding claims, characterized in that the double contact elements (1, 2) are each designed essentially cylindrical. Electrical contact system according to one of the preceding claims, characterized in that the contact area (KB) of the first double contact element (1) has axially projecting, circumferential contact lamellae (3) on the outside and an axially projecting contact pin (4) on the inside. Electrical contact system according to the preceding claim, characterized in that the contact pin (4) of the first double contact element (1) has a contact protection (BS) on its leading contact tip and that the contact protection (BS) is made of a non-electrically conductive plastic. Electrical contact system according to one of the preceding claims, characterized in that the contact area (KB') of the second double contact element (2) has a circumferential lateral surface (5) on the outside and axially projecting, circumferential contact lamellae (6) on the inside. Electrical contact system according to the preceding claim, characterized in that the contact lamellae (6) of the second double contact element (2) - viewed in the plug-in direction (SR) - protrude further than the lateral surface (5). Electrical contact system according to one of the two preceding claims, characterized in that the contact lamellae (6) of the second double contact element (2) are surrounded on the outside by a contact protection (BS') and that the contact protection (BS') is made of a non-electrically conductive plastic. Electrical contact system according to one of the preceding claims, characterized in that the contact lamellae (3) of the first double contact element (1) and the contact lamellae (6) of the second double contact element (2) each have a radially inwardly directed thickening (7) at the end. Connector system consisting of a first connector (SV1) and a second connector (SV2), at least one electrical contact system according to one of the preceding claims being used in the connector system.

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