CN112735914A

CN112735914A - Switching device, in particular switching relay for use with a starting device for an internal combustion engine

Info

Publication number: CN112735914A
Application number: CN202011095224.7A
Authority: CN
Inventors: 亨宁·斯托克林; 莫里茨·罗姆奇
Original assignee: SEG Automotive Germany GmbH
Current assignee: SEG Automotive Germany GmbH
Priority date: 2019-10-14
Filing date: 2020-10-14
Publication date: 2021-04-30
Also published as: DE102019127594A1; EP3809439A1

Abstract

The invention relates to a switching device, in particular for use with a starter device for an internal combustion engine, having two contact pins and a switching bridge for electrically connecting the contact pins to one another, the switching bridge having a carrier part which is movable in an axial direction along a switching axis, on which carrier part a first contact part and a second contact part are arranged, which are designed such that, when the carrier part is moved axially towards the contact pins, the first contact parts are in each case brought into contact with the contact pins in a first position, and when the carrier part is subsequently moved further axially, the second contact parts are additionally in each case brought into contact with the contact pins in a second position, the first position of the contact pins and the second position of the contact pins, viewed in the axial direction parallel to the switching axis, being located in different axial positions.

Description

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

Technical Field

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

Background

Starting devices for internal combustion engines usually have a starter pinion which can be displaced between an axially retracted inoperative position and an extended engagement position in which the starter pinion engages with a ring gear of the internal combustion engine. By means of the starter motor, a rotational drive movement is generated on the starter pinion. The starter motor is usually switched on by means of an electromagnetic switching relay ("coupling relay") which includes both the axial movement of the coupling mechanism and an integrated switching device for closing the main circuit of the starter motor.

The coil of the electromagnetic switching relay is usually energized by means of a further switching device (pre-relay), which can be designed as an electromagnetic switching relay.

Such switching devices or switching relays usually comprise two contact pins which can be electrically connected to one another via an axially movable contact bridge in order to close an electrical circuit for activating a contact relay or for starting a starter motor. In order to move the contact bridge, it is usually connected to a magnet armature or a switching armature, which can be moved in the axial direction by energizing the magnetic winding. In order to open the contact, the contact bridge can be separated from the contact pin by a compression spring.

DE 102010041721 a1 discloses, for example, a high-current switch or starter relay for use in an internal combustion engine starting device having a contact bridge or switch bridge. The contact surface of the switching bridge has a first part which is elastically formed relative to the remaining second part. When the contact is closed with the respective contact pin, the first part first conducts the current. As the switching distance increases, the first part moves towards the second part due to its elasticity and eventually bridges, so that a current can flow through both parts.

Disclosure of Invention

According to the invention, a switching device and a starting device for an internal combustion engine are proposed, having the features of the independent claims. Advantageous embodiments are the subject matter of the dependent claims and the subsequent description.

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

The switching bridge has a carrier part which is movable in the axial direction along a switching axis. A first contact member and a second contact member are provided on the carrier member. The carrier part is movable in the axial direction along the switching axis, in particular toward the contact pin or away from it. In particular, the carrier member is coaxial with the switch axis.

The first contact member and the second contact member are designed such that, upon axial movement of the carrier member towards the contact pin, the first contact member first makes contact with the contact pin in a first position, respectively, and, upon subsequent further axial movement, the second contact member first makes contact with the contact pin in a second position, respectively. In particular, the first contact part is arranged for this purpose on the side of the second contact part facing the contact pin. Alternatively, it is also conceivable for the first contact part to be arranged, in particular, on a side of the second contact part facing away from the contact pin.

The first position of the contact pin and the second position of the contact pin are located at different axial positions, viewed in an axial direction parallel to the switch axis. In particular, the first and second positions thus have a defined distance from each other in the axial direction. The first and second positions are thus regions of the contact pin which are arranged offset to one another in the axial direction. One of the two positions is thus located, viewed in the axial direction, in particular in front of the other position.

According to a preferred variant, the first position of the contact pin and the second position of the contact pin have different distances from the switching axis, also viewed in radial directions perpendicular to the switching axis, respectively. The first and second positions are thus preferably areas of the contact pin which are at different distances from the switch axis. Thus in particular one of the two positions is closer to the switch axis than the other position, viewed in the radial direction.

The first and second positions are thus mutually different regions of the contact pin, which are located in different positions in the axial direction and, if necessary, also in the radial direction. After the end of the axial movement of the carrier part, the first contact part and the second contact part are thus simultaneously in contact with the contact pin in two different areas or positions. The first contact member is thus in contact with the contact pin at a position or area where the second contact member is not in contact with the contact pin.

During switching of conventional switching devices, an arc often occurs between the contact pin and the contact bridge, wherein due to the high temperature in this arc, a local melting of the material of the contact bridge or contact pin occurs, which in turn leads to material losses or losses. By specially designing the switching bridge according to the invention with two contact parts, the occurrence of such an arc can be prevented or at least limited. Material losses or losses can be prevented or at least reduced and the lifetime of the switching device can be increased.

The first contact element is in particular a front contact, which during the switching-on process first produces an electrical contact between the contact pins. In this case, in particular, initially a small current flows between the contact pins via the first contact elements. The second contact element is advantageously a main contact, via which a high current can flow between the contact pins. During the switching process, the first contact part or front contact moves together with the second contact part or main contact on the same switching axis, but comes to rest against the contact pin due to its arrangement and design in front of the second contact part. In this case, a potential equalization advantageously takes place between the contact pins. By suitably selecting the material of which the first contact element is made, a reduced load current flows through the first contact element. In particular, the occurrence of arcing can thereby be prevented, or at least only weak arcing can be achieved, which arcing does not lead to or at least hardly leads to material loss.

In a corresponding manner, the first contact member and the second contact member are advantageously designed such that, when the carrier member is moved axially away from the contact pin, the second contact member is first moved away from the second position of the contact pin and is no longer in contact with the contact pin, but instead the first contact member is still in contact with the contact pin in the first position. On subsequent further axial movement, the first contact part is also moved away from the first position of the contact pin and is then no longer in contact with the contact pin. During the disconnection, the main contact is thus first opened, while the front contact continues to ensure an electrically conductive connection of the respective contact pins. This achieves an arc-free disconnection of the main contact. Only upon further displacement of the carrier part is the front contact opened, in particular also with little or no material loss.

The first contact member and the second contact member are arranged coaxially and concentrically, in particular with respect to the switch axis or the carrier member. In particular, the first and second contact elements are each configured symmetrically with respect to the switch axis. The switching device can thus be constructed particularly small and space-saving. The carrier part can be designed in particular in a cylindrical or strip-shaped manner, wherein the switching axis corresponds to the main axis of extension or the axis of symmetry of the carrier part. The switching axis may advantageously also correspond to the main extension axis of the switching device. In particular, the contact pins are arranged symmetrically with respect to the switch axis and advantageously at equal distances from the switch axis. The main extension direction of the contact pin runs in particular parallel or at least substantially parallel to the switching axis.

The carrier part can be connected in particular to a switch armature or a magnet armature, wherein the magnet armature and thus the carrier part are moved in the axial direction from the rest position toward the contact pin by energizing the magnetic winding. In order to move the carrier part and the magnet armature back into the rest position again after the end of the energization of the magnetic winding, in particular at least one spring (compression spring, contact return spring) can be provided.

Advantageously, the first position of the contact pin is respectively closer to the switching axis than the second position, viewed in a radial direction perpendicular to the switching axis. The first contact member thus makes contact with the contact pin at a position which is more internal than the second contact member with respect to the switch axis. In this case, in particular, the second contact part is arranged on the carrier part on the side of the first contact part facing away from the contact pin.

Alternatively, it is also conceivable for the second position of the contact pins to be advantageously closer to the switch axis than the first position in the radial direction, respectively. Thus, the second contact member is in contact with the contact pin at a position located further inside than the first contact member. In this case, the second contact part is arranged on the carrier part, in particular on the side of the first contact part facing the contact pin.

Preferably, the first position of the contact pin is located after the second position, viewed in the axial direction from the switch bridge. In particular, the second contact part is in this case arranged on the carrier part on the side of the first contact part facing away from the contact pin.

Alternatively, it is also conceivable that the first position is advantageously located before the second position, viewed in the axial direction from the switching bridge. In particular, the second contact part is in this case arranged on the carrier part on the side of the first contact part facing away from the contact pin.

Preferably, the first contact element and/or the second contact element are each at least substantially plate-shaped and each have a main plane of extension which is at least substantially perpendicular to the switching axis. "plate-shaped" means in particular that the length and width of the respective contact element in the main plane of extension are significantly greater than the height in the direction perpendicular to this plane, i.e. in the axial direction. In particular, the plate shapes of the first and second contact elements are each symmetrical with respect to the switching axis.

According to an advantageous embodiment, each contact pin has a first contact surface and a second contact surface, wherein the first position is located on the first contact surface, and wherein the second position is located on the second contact surface.

The first contact surfaces preferably each extend at least substantially perpendicularly to the switching axis. The second contact surfaces preferably each extend from an outer radial end (with reference to the switching axis) of the first contact surface at least substantially at a defined angle of inclination relative to the first contact surface. Alternatively, it is also conceivable for the second contact surface to extend at least substantially perpendicularly to the switching axis, and for the first contact surface to extend at least substantially at a defined angle of inclination relative to the second contact surface.

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

The first contact element makes contact with the contact pin on a first contact surface, which is located in particular in a first position or height with reference to the axial direction or with reference to the switch axis. The second contact element makes contact with the contact pin on a second contact surface, which thus extends from the first position into a second position, wherein the second position is closer to the contact bridge or the rest position of the contact bridge than the first position. The first and second contact parts are therefore advantageously brought into contact with the contact pins at positions or regions which are offset from one another, viewed in the axial direction.

The second contact surface may extend to an outer radial end of the contact pin (with reference to the switch axis). The outer radial end of the second contact surface may thus correspond to the outer radial end of the contact pin. Alternatively, it is also conceivable for a second surface to be advantageously connected to the second contact surface, which second surface can extend, for example, at least substantially perpendicularly to the switching axis. In particular, the contact pins are not rotationally symmetrical in each case.

Advantageously, the first face of the second contact part facing the contact pin extends at least substantially perpendicularly to the switching axis. The second surface of the second contact element facing away from the contact pin preferably extends at least substantially perpendicularly to the switching axis. The second face of the second contact member advantageously has a greater length in a direction perpendicular to the switch axis than the first face. The first and second faces of the second contact part thus run parallel to each other and also in particular parallel to the first contact face of the contact pin.

The third surface of the second contact member extends at a predetermined inclination angle with respect to the first surface from the outer radial end of the first surface toward the outer radial end of the second surface. The angle of inclination is thus preferably at least substantially equal to the angle of inclination: the second contact surface of the contact pin extends at the oblique angle with respect to the first contact surface. The third face is thus advantageously adapted to the second contact face of the contact pin. The second contact element can thus be brought into contact with the contact pin with its third side in a second position on its second contact surface. In particular, the second contact part thus has the shape of a truncated cone or a truncated pyramid.

Preferably, the first contact part has a cylindrical section, an annular section connected to the cylindrical section and a bent section connected to the annular section. The cylindrical section preferably extends substantially coaxially with the switch axis. Furthermore, the cylindrical section is preferably arranged between the switch axis and the second contact part, viewed in the radial direction. The annular section preferably extends at least substantially perpendicularly to the switching axis. The bending section preferably extends at a defined angle relative to the annular section. In particular, the cylindrical section is the section of the first contact part facing away from the contact pin, and the bent-over section is the section facing the contact pin. The first contact part advantageously contacts the first position of the contact pin with the bent section. The specified angle is in particular an acute angle of less than 90 °, preferably between 0 ° and 45 °, further preferably between 0 ° and 30 °.

Preferably, the first contact part has a contact plate which is arranged elastically. The contact plate is in particular provided for contacting a contact pin on its first contact surface or in a first position on the first contact surface.

Preferably, the elastic member is disposed between the second contact member and the contact plate. The spring action of the resiliently arranged contact plate is thus produced by the spring element, which may be configured, for example, as a spring washer. In particular, the spring member may be arranged on a side of the second contact member facing the contact pin, and the contact plate may in particular be arranged on a side of the spring member facing the contact pin.

Advantageously, the contact plate has a smaller length in a direction perpendicular to the switch axis than the second contact part, in particular than the first and second faces of the second contact part. The length of the contact strip is selected in particular here so that the contact strip can be brought into contact with the first contact surface of the contact pin, but not with the second contact surface. Accordingly, the length of the second contact member and its first and second faces are specifically selected such that the second contact member may be in contact with the second contact face of the contact pin, but not with the first contact face. In this case, in particular, the second contact part is arranged on the carrier part on the side of the first contact part facing away from the contact pin.

Alternatively, it is also conceivable that the contact plate advantageously has a greater length in a direction perpendicular to the switch axis than the second contact part. In this case, the second contact part is arranged in particular on the side of the first contact part facing the contact pin.

According to a particularly preferred embodiment, the first contact part and the second contact part are arranged coaxially with respect to the switch axis. The first and second contact parts are thus arranged coaxially at different axial positions or axially offset from each other on the carrier part for contacting the contact pins at different axial positions or regions, respectively.

Advantageously, the first contact member is composed of a material having a greater electrical resistance than the second contact member. With such a material with a high electrical resistance, during the switching-on process, it is possible to initially produce an electrical potential equalization between the contact pins and initially to have a reduced load current flow through the second contact part.

Preferably, the first contact member is composed of a material having a higher melting point than the second contact member. By means of such a material, it is possible in particular to achieve that no or at least almost no material losses occur in the event of an arc during switching on and off. The second contact element can be made of copper, for example, and the first contact element can be made of a copper-tungsten material (e.g., W/CuF), for example.

The starting device according to the invention for an internal combustion engine has at least one preferred embodiment of the switching device according to the invention. The starting device may in particular also have a starter pinion which is displaceable between an axially retracted inoperative position and an extended meshing position in which the starter pinion meshes with a ring gear of the internal combustion engine. Furthermore, the starting device has in particular a starter motor in order to bring the starter pinion and thus the internal combustion engine into rotational motion when the starter pinion meshes with a ring gear of the internal combustion engine. The switching device or the switching relay is advantageously provided for closing an electrical circuit for starting of the starter motor and can also be provided in particular for axial displacement of the starter pinion.

Other advantages and designs of the invention will become apparent from the description and drawings.

Drawings

The invention is illustrated schematically in the drawings by means of embodiments and will be described below with reference to the drawings.

Fig. 1 schematically shows a preferred embodiment of a starting device according to the invention for an internal combustion engine;

fig. 2 schematically shows a preferred design of the switching device according to the invention.

Detailed Description

A preferred embodiment of a starting device for an internal combustion engine according to the invention is schematically illustrated in fig. 1 and is designated by 1.

The starting device 1 has a starter pinion 2 which meshes with a ring gear 3 of the internal combustion engine for starting the internal combustion engine 4. The starter pinion 2 is mounted axially displaceably on the shaft 5, as indicated by the double arrow, wherein the starter pinion 2 is coupled in a rotationally fixed manner to the shaft 5. The starter pinion 2 is displaced between a retracted inoperative position and an extended position in engagement with the ring gear 3 of the internal combustion engine 4 by means of a starter relay 6 (engagement relay) which is electromagnetically designed and comprises an energizable relay winding 7 and a reciprocating armature 8 which is axially drawn into the relay windings 7 when they are energized, which has the function of attracting the windings. The reciprocating armature 8 actuates the engagement rod 9 which loads the engagement spring 13 which rests on the follower 14 of the freewheel. The starter pinion 2 is coupled on the output side to the follower 14, so that an axial feed movement of the follower 14 is converted into a desired axial displacement movement of the starter pinion 2 between the inoperative position and the meshing position.

The rotational drive movement transmitted to the shaft 5 or the starter pinion 2 is generated by means of an electric starter motor 11, which is coupled to the shaft 5 via a gear 12, for example a planetary gear. When the electric starter motor 11 is activated, the shaft 5 and thus the starter pinion 2 rotate.

The starter motor 11 is switched on by means of a preferred embodiment of the switching device 100 according to the invention, which can be designed as a switching relay. The circuit of starter relay 6 is closed by means of switching relay 100. The relay winding 7 is energized, so that the reciprocating armature 8 is moved and the switch for the main current of the starter motor 11 is closed, whereby the starter motor 11 is moved and the drive shaft 5 and thus the starter pinion 2 are rotated.

The starter 1 is provided with a controller 10, by means of which the function of the switching relay 100 is controlled.

It should be noted that starter relay 6 and switching relay 100 may also be designed as a common component or as a common relay, or switching relay 100 may be integrated into starter relay 6.

Fig. 2 schematically shows a preferred design of the switching relay 100.

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

A switch bridge 130 is provided for electrically connecting the contact pins 110, 120 to each other. The switching bridge has a carrier part 134 which is movable in the axial direction along the switching axis 101 and is coaxial with the switching axis 101. For this purpose, the carrier part is connected to a switching armature or magnet armature 102.

By energizing the magnet windings 103, the magnet armature 102 and thus the carrier part 134 are moved axially from the rest position, in the example of fig. 2 to the right. A compression spring or contact return spring 104 is provided so that the magnet armature 102 and the carrier 134 move back to the rest position after the end of the energization of the magnet windings 103.

The first contact member 131 is provided on the carrier member 134. On the side of the first contact part 131 facing away from the contact pins 110, 120, a second contact part 132 is arranged on the carrier part 134. Furthermore, an elastic member 133 in the form of an elastic washer is provided between the first contact member 131 and the second contact member 132. Furthermore, a retaining washer may be provided on the side of the first contact part 131 facing the contact pins 110, 120.

The first contact member 131 and the second contact member 132 are designed such that, upon axial movement of the carrier member 134 towards the contact pins 110, 120, first the first contact member 131 contacts the contact pins 110, 120 in the

first positions

111, 121, respectively, and upon subsequent further axial movement the second contact member 132 additionally contacts the contact pins 110, 120 in the

second positions

112, 122, respectively. The

first position

111 or 121 and the

second position

112 or 122 are here mutually different regions of the contact pins 110, 120.

After the axial movement of the carrier part 134 has ended, the first contact part 131 and the second contact part 132 are thus simultaneously in contact with the contact pins 110, 120 in two different areas or positions. The first contact member 131 thus makes contact with the

contact pin

110 or 120 at the

position

111 or 121, in which the second contact member 132 does not make contact with the

contact pin

110, 120.

As can be seen in fig. 2, the

first position

111 or 121 is located on a first contact surface of the

contact pin

110 or 120, which first contact surface extends at least substantially perpendicularly to the switch axis 101. The

second position

112 or 122 is located on a second side of the

contact pin

110 or 120, which extends from an outer radial end of the first contact surface at least substantially at a defined inclination angle, for example 135 °, relative to the first contact surface. The contact pins 110 and 120 are in particular not rotationally symmetrical.

A first face 132a of the second contact member 132 facing the contact pins 110, 120 extends at least substantially perpendicularly to the switch axis 101. Accordingly, the second face 132b of the second contact part 132 facing away from the contact pins 110, 120 extends at least substantially perpendicularly to the switching axis 101. The third surface 132c of the second contact member 132 extends from the outer radial end of the first surface 132a toward the outer radial end of the second surface 132b at a predetermined inclination angle of, for example, 135 ° with respect to the first surface 132 a. The third face 132c of the second contact part 132 thus fits with the second contact face or

second position

112 or 122 of the

contact pin

110, 120. In particular, the second contact member 132 has the shape of a truncated cone or a truncated pyramid.

The first contact part 131 is configured as a resiliently arranged contact plate. The spring action is produced in particular by the spring element 133. The contact plate 131 has in particular a smaller length in a direction perpendicular to the switch axis 101 than the first face 132a and the second face 132b of the second contact member 132.

The contact plate 131 has a cylindrical section 131a which extends substantially coaxially with the switch axis 101 in the axial direction. The cylindrical section 131a surrounds the switching axis 101 and is arranged, viewed radially, between the switching axis 101 and the second contact element 132.

Connected to the cylindrical portion 131a is an annular portion 131b, which extends at least substantially in a radial direction perpendicular to the switching axis 101. The annular portion 131b in particular bears against the elastic washer 133.

From the outer radial end of the annular portion 131b, a bent portion 131c extends, which extends at a defined angle to the annular portion 131 b.

The regions of the first and

second contact parts

131, 132 which make electrical contact with the contact pins 110, 120, in particular the bent section 131c and the first face 132a, are arranged coaxially with the switching axis 101 at different axial positions or axially offset from one another on the carrier part 134 in order to make contact with the contact pins 110, 120 in different axial positions or regions, respectively.

The first contact means 131 is composed of a material with a higher electrical resistance and a higher melting point than the second contact means 132, so that in particular arcing can be prevented during switching on and off, or even if arcing occurs, at least no or at least almost no material loss occurs.

Claims

1. A switching device (100), in particular a switching relay for use with a starting device (1) for an internal combustion engine, having two contact pins (110, 120) and a switching bridge (130) for electrically connecting the contact pins (110, 120) to one another,

wherein the switch bridge (130) has a carrier part (134) which is movable in the axial direction along a switch axis (101),

wherein a first contact part (131) and a second contact part (132) are arranged on the carrier part (134),

wherein the first contact part (131) and the second contact part (132) are designed such that, upon an axial movement of the carrier part (134) towards the contact pins (110, 120), firstly the first contact part (131) contacts the contact pins (110, 120) in a first position (111, 121), respectively, and, upon a subsequent further axial movement, the second contact part (132) additionally contacts the contact pins (110, 120) in a second position (112, 122), respectively,

wherein the first position (111, 121) of the contact pin (110, 120) and the second position (112, 122) of the contact pin (110, 120) are located at different axial positions, viewed in an axial direction parallel to the switch axis (101).

2. The switching device (100) according to claim 1, wherein the first position (111, 121) of the contact pins (110, 120) is located after the second position (112, 122) as seen in an axial direction from the switch bridge (130).

3. The switching device (100) according to any one of the preceding claims, wherein the first position (111, 121) of the contact pin (110, 120) and the second position (112, 122) of the contact pin (110, 120) have different distances from the switching axis (101), respectively, as seen in a radial direction perpendicular to the switching axis (101).

4. The switching device (100) according to claim 3, wherein the first position (111, 121) of the contact pins (110, 120) is closer to the switching axis (101) than the second position (112, 122) of the contact pins (110, 120), respectively, as seen in a radial direction perpendicular to the switching axis (101).

5. The switching device (100) according to any one of the preceding claims, wherein the first contact part (131) and/or the second contact part (132) are each configured at least substantially plate-shaped and each have a main plane of extension which is at least substantially perpendicular to the switching axis (101).

6. The switching device (100) according to any one of the preceding claims, wherein each contact pin (110, 120) has a first contact surface and a second contact surface, respectively, wherein the first contact surfaces extend at least substantially perpendicularly to the switching axis (101), wherein the second contact surfaces extend at least substantially at a defined angle of inclination relative to the first contact surfaces, respectively, from outer radial ends of the first contact surfaces, wherein the first positions (111, 121) are located on the first contact surfaces, respectively, and wherein the second positions (112, 122) are located on the second contact surfaces, respectively.

7. The switching device (100) according to claim 6, wherein a first face (132a) of the second contact part (132) facing the contact pins (110, 120) extends at least substantially perpendicularly to the switching axis (101), wherein a second face (132b) of the second contact part (132) facing away from the contact pins extends at least substantially perpendicularly to the switching axis (101), wherein a third face (132c) of the second contact part (132) extends from an outer radial end of the first face (132a) towards an outer radial end of the second face (132b) at a defined inclination angle with respect to the first face (132 a).

8. The switching device (100) according to any one of the preceding claims, wherein the first contact part (131) has a cylindrical section (131a), an annular section (131b) connected to the cylindrical section (131a), and a bent section (131c) connected to the annular section (131b), wherein the cylindrical section (131a) extends substantially coaxially with the switching axis (101), wherein the annular section (131b) extends at least substantially perpendicularly to the switching axis (101), wherein the bent section (131c) extends at a defined angle relative to the annular section (131 b).

9. The switching device (100) according to claim 8, wherein the cylindrical section (131a) of the second contact part (131) is arranged between the switching axis (101) and the second contact part (132) as seen in a radial direction.

10. The switching device (100) according to any one of the preceding claims, wherein the first contact part (131) has a resiliently arranged contact plate.

11. The switching device (100) according to claim 10, wherein an elastic member (133) is arranged between the second contact member (132) and the contact plate.

12. The switching device (100) according to claim 10 or 11, wherein the contact plate (131) has a smaller length in a direction perpendicular to the switching axis (101) than the second contact part (132), in particular than the first face (132a) and the second face (132b) of the second contact part (132).

13. The switching device (100) according to any one of the preceding claims, wherein areas of the first contact member (131) and the second contact member (132) which make electrical contact with the contact pins are arranged coaxially with respect to the switching axis (101).

14. The switching device (100) according to any one of the preceding claims, wherein the first contact member (131) is composed of a material having a larger electrical resistance and/or a higher melting point than the second contact member (132).

15. A starting device (1) for an internal combustion engine, having at least one switching device (100) according to any one of the preceding claims.