DE102019127594A1 - Switching device, in particular switching relay for use with a starting device for an internal combustion engine - Google Patents

Abstract

The invention relates to a switching device (100) with two contact pins (110, 120) and a switching bridge (130) for electrically connecting the contact pins (110, 120) to one another, the switching bridge (130) having an axial direction along a switching axis (101) movable carrier element (134), wherein a first contact element (131) and a second contact element (132) are arranged on the carrier element (134), the first contact element (131) and the second contact element (132) being designed such that at axial movement of the carrier element (134) towards the contact pins (110, 120), the first contact element (131) touches the contact pins (110, 120) each at a first point (111, 121) and that with subsequent further axial movement the The second contact element (132) touches the contact pins (110, 120) at a second location (112, 122), the first location (111, 121) being the contact pin (110, 120) and the second location (1st location) 12, 122) of the contact pins (110, 120) each viewed in the radial direction perpendicular to the switching axis (101) have a different distance from the switching axis (101) and / or where the first point (111, 121) of the contact pins (110, 120) and the second point (112, 122) of the contact pins (110, 120), viewed in the axial direction parallel to the switching axis (101), lie at different axial positions.

Description

The present invention relates to a switching device, in particular a switching relay for use with a starting device for an internal combustion engine, as well as a starting device for an internal combustion engine.

State of the art

A starting device for an internal combustion engine usually has a starter pinion which is adjustable between an axially retracted inoperative position and an advanced engagement position in which the starter pinion engages a ring gear of the internal combustion engine. With the help of an electric starter motor, a rotating drive movement is generated on the starter pinion. The starter motor is usually switched on via an electromagnetic switching relay ("engagement relay"), which contains both the axial movement of the engagement mechanism and an integrated switching device for closing the main circuit of the starter motor.

The coils of this electromagnetic switching relay are usually supplied with current with the aid of a further switching device (“pre-relay”), which can be designed as an electromagnetic switching relay.

Such a switching device or switching relay usually comprises two contact bolts which can be electrically connected to one another via an axially movable contact bridge in order to close an electrical circuit for actuating the engagement relay or for starting the starter motor. To move the contact bridge, it is usually connected to a magnet armature or switch armature, which can be set in axial movement by energizing a magnet winding. To open the contacts, the contact bridge can be separated from the contact bolts by a compression spring.

The DE 10 2010 041 721 A1 discloses, for example, a high-current switch or a starter relay for use in a device for starting internal combustion engines with a contact or switching bridge. A contact surface of this switching bridge has a first part which is designed to be elastic with respect to a second remaining part. When a contact is closed with the corresponding contact pin, this first part carries current first. As the switching path increases, the first part is shifted in the direction of the second part due to its elasticity and is ultimately bridged so that current can flow through both parts.

Disclosure of the invention

According to the invention, a switching device and a starting device for an internal combustion engine with the features of the independent claims are proposed. Advantageous refinements are the subject matter of the subclaims and the description below.

The switching device has two contact bolts and a switching bridge for electrically connecting the contact bolts to one another. In particular, the switching device is designed as a switching relay and is expediently provided for use with a starting device for an internal combustion engine. By electrically connecting the contact bolts, in particular a circuit for starting a starter motor is closed, which circuit can be connected to an internal combustion engine via a starter pinion.

The switching bridge has a carrier element which can be moved in the axial direction along a switching axis. A first contact element and a second contact element are arranged on the carrier element. The carrier element can be moved in the axial direction along the switching axis, in particular towards and away from the contact bolts. In particular, the carrier element is coaxial with this switching axis.

The first contact element and the second contact element are designed in such a way that when the carrier element moves axially towards the contact bolts, the first contact element initially touches the contact bolts at a first point and that with subsequent further axial movement, the second contact element also touches the contact bolts at a second Body touched. In particular, for this purpose, the first contact element is arranged on a side of the second contact element facing the contact bolt. Alternatively, it is also conceivable that the first contact element is arranged in particular on a side of the second contact element facing away from the contact bolts.

According to a variant, the first point of the contact bolts and the second point of the contact bolts each have a different distance from the switching axis, viewed in the radial direction perpendicular to the switching axis. The first and the second point are thus areas of the contact bolts that are different distances from the switching axis. Thus, in particular, one of the two points, viewed in the radial direction, is closer to the switching axis than the other point.

Alternatively or additionally, the first point of the contact bolts and the second point of the contact bolts lie parallel to the in the axial direction Switching axis viewed at different axial positions. In particular, the first and the second point are thus at a predetermined distance from one another in the axial direction. The first and the second point are thus areas of the contact bolts that are offset from one another in the axial direction. One of the two points is therefore in particular in front of the other point when viewed in the axial direction.

The first point and the second point are thus mutually different areas of the contact bolts, each of which is located at different positions in the radial and / or axial direction. After the axial movement of the carrier element has ended, the first contact element and the second contact element thus touch the contact bolts at the same time in two different areas or locations. The first contact element thus touches the contact studs at a point or in an area at which or in which the second contact element does not touch the contact studs.

During switching operations of conventional switching devices, arcs can often occur between the contact pins and the contact bridge, whereby the high temperature in such arcs can lead to a local melting of the material of the contact bridge or the contact pins, which in turn leads to material removal and wear. Due to the special design of the switching bridge of the present invention with two contact elements, the occurrence of such arcs can be prevented or at least restricted. Material removal and wear can be prevented or at least reduced and a service life of the switching device can be increased.

The first contact element represents, in particular, a pre-contact which, during a switch-on process, first establishes an electrical contact between the contact bolts. In particular, a small current initially flows between the contact bolts via the first contact element. The second contact element expediently represents a main contact via which a high current can flow between the contact bolts. During a switching process, the first contact element or the pre-contact moves on the same switching axis together with the second contact element or the main contact, but comes into contact with the contact bolt due to its arrangement and configuration in front of the second contact element. In this case, a potential equalization takes place between the contact bolts. By suitable selection of the material from which the first contact element is made, a reduced load current flows through the first contact element. In particular, the occurrence of an arc can thus be prevented or at least it can be achieved that only a weak arc occurs, which leads to no or at least hardly any material removal.

In a corresponding manner, the first contact element and the second contact element are expediently designed in such a way that when the carrier element moves axially away from the contact bolts, the second contact element is first moved away from the second point of the contact bolts and no longer touches the contact bolts, and the first contact element no longer touches the contact bolts however, still touched at the first point. With a subsequent further axial movement, the first contact element is also moved away from the first point of the contact bolts and then no longer touches the contact bolts. In the event of a switch-off process, the main contact is therefore initially opened, while the pre-contact continues to ensure a conductive connection between the contact pins. This achieves an arc-free shutdown of the main contacts. Only with further movement of the carrier element does the pre-contact also opens, again in particular with little or hardly any material removal.

The first contact element and the second contact element are in particular arranged coaxially and concentrically to the switching axis or the carrier element. In particular, the first and the second contact element are each designed symmetrically to the switching axis. The switching device can thus be built in a particularly small and space-saving manner. The carrier element can in particular be cylindrical or bar-shaped, the switching axis corresponding to a main axis of extent or axis of symmetry of the carrier element. The switching axis can also expediently correspond to a main extension axis of the switching device. In particular, the contact pins are arranged symmetrically to the switching axis and expediently have equidistant distances from the switching axis. A main direction of extent of the contact bolts in each case runs in particular parallel or at least substantially parallel to the switching axis.

The carrier element can in particular be connected to a switching armature or magnet armature, with this magnet armature and thus the carrier element being moved from a rest position in the axial direction towards the contact bolts by energizing a magnet winding. In order to move the carrier element and the magnet armature back into the rest position after the end of the energization of the magnet winding, at least one spring (compression spring, contact return spring) can in particular be provided.

Advantageously, the first point of the contact pins is each perpendicular in the radial direction to the switching axis considered closer to the switching axis than the second point. The first contact element thus touches the contact bolts at a point further inward with respect to the switching axis than the second contact element. In this case, in particular, the second contact element is arranged on the carrier element on a side of the first contact element facing away from the contact bolt.

Alternatively, it is also conceivable that the second point of the contact pins is expediently closer to the switching axis than the first point in each case in the radial direction. Thus, the second contact element touches the contact bolts at a point further inward than the first contact element. In this case, the second contact element is arranged in particular on a side of the first contact element facing the contact bolt on the carrier element.

The first point of the contact bolts is preferably located behind the second point in the axial direction when viewed from the switching bridge. In this case, in particular, the second contact element is arranged on the carrier element on a side of the first contact element facing away from the contact bolt.

Alternatively, it is also conceivable that the first point, viewed from the switching bridge, expediently lies in front of the second point in the axial direction. In particular, in this case the second contact element is arranged on the carrier element on a side of the first contact element facing away from the contact bolt.

The first contact element and / or the second contact element are preferably each at least substantially plate-shaped and each have a main extension plane at least substantially perpendicular to the switching axis. In this context, plate-shaped is to be understood in particular as meaning that a length and width of the respective contact element in this main plane of extent are significantly greater than a height in a direction perpendicular to this plane, i.e. in the axial direction. In particular, the plate shape of the first and second contact element is each symmetrical to the switching axis.

According to an advantageous embodiment, each of the contact bolts has a first contact surface and a second contact surface, the first point being in the first contact surface and the second point being in the second contact surface.

The first contact surface preferably extends in each case at least substantially perpendicular to the switching axis. The second contact surface preferably extends in each case from an outer radial end (in relation to the switching axis) of the first contact surface at least substantially at a predetermined angle of inclination in relation to the first contact surface. Alternatively, it is also conceivable that the second contact surface expediently extends at least substantially perpendicular to the switching axis and that the first contact surface extends at least substantially at a predetermined angle of inclination with respect to the second contact surface.

The angle of inclination is in particular an obtuse angle and in particular has a value greater than 90 °. In relation to the switching axis, this second contact surface thus extends in particular at an acute angle of less than 90 °, preferably at an angle between 0 ° and 45 °, more preferably between 0 ° and 30 °.

The first contact surface, on which the first contact element touches the contact bolts, is located in particular at a first position or height in relation to the axial direction or in relation to the switching axis. The second contact surface, on which the second contact element touches the contact bolts, thus extends from this first position to a second position, this second position being closer to the contact bridge or to the rest position of the contact bridge than the first position. The first and the second contact element therefore expediently touch the contact bolts at points or areas that are offset from one another when viewed in the axial direction.

The second contact surface can extend as far as an outer radial end (with respect to the switching axis) of the contact pin. An outer radial end of the second contact surface can thus correspond to the outer radial end of the contact pin. Alternatively, it is also conceivable that the second contact surface is expediently followed by a further surface which, for example, can extend at least substantially perpendicular to the switching axis. In particular, the contact pins are not each rotationally symmetrical.

Advantageously, a first surface of the second contact element facing the contact bolt extends at least substantially perpendicular to the switching axis. A second surface of the second contact element facing away from the contact bolt preferably extends at least substantially perpendicular to the switching axis. The second surface of the second contact element expediently has a greater length in a direction perpendicular to the switching axis than the first surface. These first and second surfaces of the second contact element thus run parallel to one another and furthermore in particular parallel to the first contact surface of the contact bolts.

A third surface of the second contact element extends from an outer radial end of the first surface to an outer radial end of the second surface at the predetermined inclination angle with respect to the first surface. This angle of inclination thus preferably corresponds at least essentially to the angle of inclination at which the second contact surface of the contact bolt extends in relation to the first contact surface. The third surface is therefore expediently adapted to the second contact surface of the contact bolts. The third surface of the second contact element can thus touch the contact bolts at the second point located in their second contact surface. In particular, the second contact element thus has the shape of a truncated cone or a truncated pyramid.

The first contact element preferably has a cylindrical section, an annular section adjoining the cylindrical section, and an angled section adjoining the annular section. The cylindrical section preferably extends essentially coaxially to the switching axis. Furthermore, viewed in the radial direction, the cylindrical section is preferably arranged between the switching axis and the second contact element. The annular section preferably extends at least substantially perpendicular to the switching axis. The angled section preferably extends at a predetermined angle with respect to the annular section. In particular, the cylindrical section is a section of the first contact element facing away from the contact bolt and the angled section is a section facing the contact bolt. With the angled section, the first contact element expediently touches the first point of the contact bolt. The specified angle is in particular an acute angle smaller than 90 °, preferably between 0 ° and 45 °, more preferably between 0 ° and 30 °.

The first contact element preferably has a resiliently arranged contact plate. The contact plate is provided in particular to touch the contact bolts at their first contact surface or at the first point located in this first contact surface.

A spring element is preferably arranged between the second contact element and the contact plate. The spring action of the resiliently arranged contact plate is thus generated by this spring element, which can be designed, for example, as a spring washer. In particular, the spring element can be arranged on a side of the second contact element facing the contact bolt and the contact plate can in particular be arranged on a side of the spring element facing the contact bolt.

The contact plate advantageously has a shorter length in a direction perpendicular to the switching axis than the second contact element, in particular than the first surface and the second surface of the second contact element. The length of the contact plate is selected in particular such that the contact plate can touch the first contact surface of the contact bolts, but not the second contact surface. Correspondingly, the length of the second contact element and its first and second surfaces are selected in particular such that the second contact element can touch the second contact surface of the contact bolts, but not the first contact surface. In this case, in particular, the second contact element is arranged on the carrier element on a side of the first contact element facing away from the contact bolt.

Alternatively, it is also conceivable that the contact plate expediently has a greater length in a direction perpendicular to the switching axis than the second contact element. In particular, the second contact element is arranged on a side of the first contact element facing the contact bolt.

According to a particularly preferred embodiment, the first contact element and the second contact element are arranged coaxially to the switching axis. The first and the second contact element are thus arranged coaxially at different axial positions or axially offset from one another on the carrier element, in order to contact the contact bolts in each case at different axial locations or areas.

The first contact element advantageously consists of a material with a higher electrical resistance than the second contact element. With such a high-resistance material, it can be achieved during switch-on processes that there is initially a potential equalization between the contact bolts and an initially reduced load current flows through the second contact element.

The first contact element preferably consists of a material with a higher melting point than the second contact element. By means of such a material, during switch-on and switch-off processes it can be achieved in particular that there is no or at least hardly any material removal when an arc occurs. The second contact element can be made of copper, for example, and the first contact element, for example, of a copper-tungsten material (e.g. W / CuF).

A starting device according to the invention for an internal combustion engine has at least one preferred embodiment of a switching device according to the invention. The starting device can furthermore in particular have a starter pinion which is adjustable between an axially retracted non-functional position and an advanced engagement position in which the starter pinion engages a ring gear of the internal combustion engine. Furthermore, the starting device has in particular a starter motor in order to set the starter pinion and thus the internal combustion engine in rotary motion when the starter pinion engages the ring gear of the internal combustion engine. The switching device or switching relay is expediently provided in order to close an electrical circuit for starting the starter motor and can also be provided in particular for the axial movement of the starter pinion.

Further advantages and embodiments of the invention emerge from the description and the accompanying drawing.

The invention is shown schematically in the drawing using exemplary embodiments and is described below with reference to the drawing.

Figure list

• 1 shows schematically a preferred embodiment of a starting device according to the invention for an internal combustion engine.
• 2 shows schematically a preferred embodiment of a switching device according to the invention.

Embodiment (s) of the invention

In 1 a preferred embodiment of a starting device according to the invention for an internal combustion engine is shown schematically and denoted by 1.

The starting device 1 has a starter pinion 2 on that to start the internal combustion engine 4th in engagement with a ring gear 3 the internal combustion engine is brought. The starter pinion 2 is on a wave 5 mounted axially displaceably as indicated by the double arrow, the starter pinion 2 rotatably with the shaft 5 is coupled. The starter pinion 2 is between a retracted inoperative position and an advanced engagement position with the ring gear 3 the internal combustion engine 4th via a starter relay 6th (Engaging relay) adjusted, which is designed electromagnetically and an energizable relay windings 7th as well as a lifting anchor 8th includes that when the relay windings are energized 7th , which has the function of a pull-in winding, is drawn axially into it. The lifting anchor 8th operates an engagement lever 9 , the one track spring 13th acted upon that on a driver 14th a roller freewheel sits on. The starter pinion 2 is on the output side with the driver 14th coupled so that the axial feed movement of the driver 14th into the desired axial adjustment movement of the starter pinion 2 is implemented between the inoperative position and the engaged position.

The rotating drive movement on the shaft 5 or the starter pinion 2 is made using an electric starter motor 11 generated by a gearbox 12th , for example a planetary gear with the shaft 5 is coupled. When the electric starter motor is actuated 11 becomes the wave 5 and thus also the starter pinion 2 set in rotation.

Switching on the starter motor 11 takes place via a preferred embodiment of a switching device according to the invention 100 , which can be designed as a switching relay. With the help of the switching relay 100 becomes an electrical circuit for the starter relay 6th closed. The relay windings 7th are energized, move the lifting armature 8th and close the switch for the main current of the starter motor 11 , making the starter motor 11 set in motion and the wave 5 as well as the starter pinion 2 are driven in rotation.

The starting device 1 is a control device 10 assigned via which the functions of the switching relay 100 is controlled.

It should be noted that the starter relay 6th and the switch lais 100 can also be designed as a common component or as a common relay or that the switch relay 100 in the starter relay 6th can be integrated.

2 shows schematically a preferred embodiment of the switching relay 100 .

The switching relay 100 has a first contact pin 110 and a second contact pin 120 on, the first contact pin 110 for example, can be connected to a motor vehicle battery and the second contact pin 120 for example with the starter motor 11 .

A switching bridge 130 is for the electrical connection of the contact pins 110 , 120 provided with each other. The switching bridge has a carrier element 134 on, which in an axial direction along a switching axis 101 movable and coaxial with the switching axis 101 is. For this purpose, the carrier element is equipped with a switch armature or magnet armature 102 connected.

By energizing a magnet winding 103 become the magnet armature 102 and thus that Support element 134 axially moved from a rest position and in the example of 2 moved to the right. A compression spring or contact return spring 104 is provided to armature 102 and support element 134 after the end of the energization of the magnet winding 103 move back to the rest position.

On the carrier element 134 is a first contact element 131 arranged. On one of the contact pins 110 , 120 remote side of the first contact element 131 is a second contact element 132 on the carrier element 134 arranged. Furthermore, is between the first contact element 131 and the second contact element 132 a spring element 133 arranged in the form of a spring washer. On one of the contact pins 110 , 120 facing side of the first contact element 131 a retaining disk can also be provided.

The first contact element 131 and the second contact element 132 are designed in such a way that upon axial movement of the carrier element 134 to the contact bolts 110 , 120 towards first the first contact element 131 the contact pins 110 , 120 always at the first place 111 , 121 touches and that with subsequent further axial movement additionally the second contact element 132 the contact pins 110 , 120 each in a second place 112 , 122 touched. This first place 111 or. 121 and this second place 112 or. 122 are mutually different areas of the contact pins 110 , 120 .

After the end of the axial movement of the carrier element 134 touch the first contact element 131 and the second contact element 132 the contact pins 110 , 120 thus at the same time in two different areas or locations. The first contact element 131 touches the contact pin 110 or. 120 thus in one place 111 or. 121 on which the second contact element 132 the contact pins 110 , 120 not touched.

As in 2 can be seen, is the first digit 111 or. 121 in a first contact surface of the contact pin 110 or. 120 which is at least substantially perpendicular to the switching axis 101 extends. The second place 112 or. 122 lies in a second surface of the contact pin 110 or. 120 , which each extends from an outer radial end of the first contact surface at least substantially at a predetermined angle of inclination with respect to the first contact surface of, for example, 135 °. The contact bolts 110 and 120 are in particular not rotationally symmetrical.

One the contact pin 110 , 120 facing first surface 132a of the second contact element 132 extends at least substantially perpendicular to the switching axis 101 . Correspondingly, one extends the contact pin 110 , 120 remote second surface 132b of the second contact element 132 at least substantially perpendicular to the switching axis 101 . A third area 132c of the second contact element 132 extends from an outer radial end of the first surface 132a to an outer radial end of the second surface 132b towards the predetermined angle of inclination of, for example, 135 ° with respect to the first surface 132a . The third area 132c of the second contact element 132 is therefore at the second contact surface or at the second point 112 or. 122 the contact bolt 110 , 120 customized. In particular, the second contact element 132 the shape of a truncated cone or a truncated pyramid.

The first contact element 131 is designed as a resiliently arranged contact plate. The spring action is in particular due to the spring element 133 generated. The contact plate 131 in particular has a shorter length in a direction perpendicular to the switching axis 101 on than the first face 132a and the second face 132b of the second contact element 132 .

The contact plate 131 has a cylindrical section 131a on, which is essentially in the axial direction coaxially to the switching axis 101 extends. This cylindrical section 131a is around the switching axis 101 around and viewed in the radial direction between the switching axis 101 and the second contact element 132 is arranged.

To the cylindrical section 131a closes an annular section 131 b, which is at least substantially in the radial direction perpendicular to the switching axis 101 extends. This annular section 131b is particularly due to the spring washer 133 at.

From an outer radial end of this annular section 131b an angled section extends out 131c which is at a predetermined angle with respect to the annular section 131b extends.

The areas of the first contact element 131 and the second contact element 132 which make electrical contact with the contact pin 110 and 120 manufacture, especially the angled section 131c and the first face 132a , are coaxial with the switching axis 101 at different axial positions or axially offset from one another on the carrier element 134 arranged to the contact studs 110 , 120 to touch in each case at different axial points or areas.

The first contact element 131 is made of a material with higher electrical resistance and higher melting point than the second Contact element 132 so that the occurrence of arcs in particular can be prevented during switch-on and switch-off processes or so that there is at least no or at least hardly any material removal if an arc does nevertheless occur.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the 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.

Patent literature cited

• DE 102010041721 A1 [0005]

Claims (15)

Switching device (100), in particular switching relay for use with a starting device (1) for an internal combustion engine, with two contact bolts (110, 120) and a switching bridge (130) for electrically connecting the contact bolts (110, 120) to one another, wherein the switching bridge (130) has a carrier element (134) which can be moved in the axial direction along a switching axis (101), wherein a first contact element (131) and a second contact element (132) are arranged on the carrier element (134), wherein the first contact element (131) and the second contact element (132) are designed in such a way that upon axial movement of the carrier element (134) towards the contact bolts (110, 120), the first contact element (131) first of all the contact bolts (110, 120) each touches at a first point (111, 121) and that with subsequent further axial movement the second contact element (132) also touches the contact pins (110, 120) at a second point (112, 122), wherein the first point (111, 121) of the contact bolts (110, 120) and the second point (112, 122) of the contact bolts (110, 120) each viewed in the radial direction perpendicular to the switching axis (101) a different distance from the switching axis (101) and / or where the first point (111, 121) of the contact bolts (110, 120) and the second point (112, 122) of the contact bolts (110, 120) viewed in the axial direction parallel to the switching axis (101) lie in different axial positions. Switching device (100) after Claim 1 , wherein the first point (111, 121) of the contact pins (110, 120), viewed in the radial direction perpendicular to the switching axis (101), is closer to the switching axis (101) than the second point (112, 122) of the contact pins (110 , 120). Switching device (100) after Claim 1 or 2 , wherein the first point (111, 121) of the contact bolts (110, 120) is located behind the second point (112, 122) viewed from the switching bridge (130) in the axial direction. Switching device (100) according to one of the preceding claims, wherein the first contact element (131) and / or the second contact element (132) are each at least substantially plate-shaped and each have a main extension plane at least substantially perpendicular to the switching axis (101). Switching device (100) according to one of the preceding claims, wherein each of the contact bolts (110, 120) each has a first contact surface and a second contact surface, the first contact surface each extending at least substantially perpendicular to the switching axis (101), the second contact surface in each case extends from an outer radial end of the first contact surface at least substantially at a predetermined angle of inclination with respect to the first contact surface and wherein the first point (111, 121) lies in each case in the first contact surface and wherein the second point (112, 122 ) lies in the second contact area. Switching device (100) after Claim 5 , wherein a first surface (132a) of the second contact element (132) facing the contact bolts (110, 120) extends at least substantially perpendicular to the switching axis (101), wherein a second surface (132b) of the second contact element (132b) facing away from the contact bolts extends. 132) extends at least substantially perpendicular to the switching axis (101), a third surface (132c) of the second contact element (132) extending from an outer radial end of the first surface (132a) to an outer radial end of the second surface (132b) extends at the predetermined inclination angle with respect to the first surface (132a). Switching device (100) according to one of the preceding claims, wherein the first contact element (131) has a cylindrical section (131a), an annular section (131b) adjoining the cylindrical section (131a) and an annular section (131b) adjoining having angled section (131c), wherein the cylindrical section (131a) extends essentially coaxially to the switching axis (101), wherein the annular section (131b) extends at least essentially perpendicular to the switching axis (101) and wherein the angled Section (131c) extends at a predetermined angle with respect to the annular portion (131b). Switching device (100) after Claim 7 , wherein the cylindrical section (131a) of the second contact element (131), viewed in the radial direction, is arranged between the switching axis (101) and the second contact element (132). Switching device (100) according to one of the preceding claims, wherein the first contact element (131) has a resiliently arranged contact plate. Switching device (100) after Claim 9 , wherein a spring element (133) is arranged between the second contact element (132) and the contact plate. Switching device (100) after Claim 9 or 10 , wherein the contact plate (131) has a shorter length in a direction perpendicular to the switching axis (101) than the second contact element (132), in particular than the first surface (132a) and the second surface (132b) of the second contact element (132) . Switching device (100) according to one of the preceding claims, wherein the areas of the first contact element (131) and of the second contact element (132), which establish electrical contact with the contact bolts, are arranged coaxially to the switching axis (101). Switching device (100) according to one of the preceding claims, wherein the first contact element (131) consists of a material with a higher electrical resistance than the second contact element (132). Switching device (100) according to one of the preceding claims, wherein the first contact element (131) consists of a material with a higher melting point than the second contact element (123). Starting device (1) for an internal combustion engine with at least one switching device (100) according to one of the preceding claims.

Images