Switch actuation mechanism and brake signal transmitter

Abstract

The application provides a switch triggering mechanism and a brake signal transmitter. The switch triggering mechanism comprises a first triggering part capable of changing state with the movement of a first movable mechanism of the brake signal transmitter, a second triggering part capable of changing the state of a second movable mechanism of the brake signal transmitter, a connecting part connecting the first triggering part and the second triggering part, wherein the connecting part is threadedly connected with the first triggering part and gap-fittingly sleeved with the second triggering part, and a limiting part connected with the connecting part and axially supporting and limiting the second triggering part. The design of threadedly connecting the first triggering part with the connecting part, gap-fittingly sleeving the second triggering part with the connecting part, and axially supporting and limiting the second triggering part by the limiting part realizes the assembly and debugging function of the switch triggering mechanism, avoids the bias between the components of the switch triggering mechanism after the assembly is completed, ensures the reliable realization of the function of the switch triggering mechanism, and further ensures the normal work of the brake signal transmitter.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and more specifically, to switch actuation mechanisms and brake signal transmitters. Background Technology

[0002] The vehicle's brake signal transmitter is used to convert the driver's action of pressing the brake pedal into two different electrical signals through a magnetic rod assembly and a switch actuation mechanism, and transmit them to the vehicle's ECU (Electronic Control Unit). The ECU then generates brake pressure signals to control braking and other brake-related signals (such as brake light signals).

[0003] The switch actuation mechanism includes a first actuating element for cooperating with a first movable mechanism (e.g., a push rod) of the brake signal transmitter, a second actuating element for cooperating with a second movable mechanism (e.g., a shift fork) of the brake signal transmitter, and a connecting element connecting the first and second actuating elements. When the brake pedal is depressed, the first movable mechanism moves accordingly, changing the engagement state between the first movable mechanism and the first actuating element. This allows the switch actuation mechanism to move, causing the second actuating element to actuate the second movable mechanism, thereby triggering the switch of the brake signal transmitter. The brake signal transmitter then transmits relevant signals to the vehicle ECU, which in turn generates brake-related signals.

[0004] In related switch actuation mechanisms, the first actuating element and the connecting element are generally connected by a ball-and-socket joint, while the second actuating element and the connecting element are connected by threads. During the assembly of the switch actuation mechanism into the brake signal transmitter, the position of the second actuating element can be adjusted by rotating the connecting element to ensure that its positional relationship with the second movable mechanism meets design requirements. After assembly, because the first actuating element can rotate freely around the ball head, there is a possibility that the first actuating element may be offset relative to the connecting element. In the case of offset, the switch actuation mechanism may rub against other components or even jam during movement, affecting the normal operation of the brake signal transmitter.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] This application provides a switch actuation mechanism and a brake signal transmitter, which can effectively solve the offset problem between components of the switch actuation mechanism while ensuring product functionality and assembly debugging, thereby ensuring the reliability of the switch actuation mechanism and the normal operation of the brake signal transmitter.

[0007] According to one aspect of this application, a switch actuation mechanism is provided for a brake signal transmitter. The switch actuation mechanism includes a first actuating member whose state can be changed with the movement of a first movable mechanism of the brake signal transmitter, a second actuating member whose state can be changed with the movement of a second movable mechanism of the brake signal transmitter, and a connecting member connecting the first actuating member and the second actuating member, wherein: the first actuating member and the connecting member are threadedly connected, and the second actuating member and the connecting member are loosely fitted together; the switch actuation mechanism further includes a limiting member connected to the connecting member, and the second actuating member is supported and limited axially by the limiting member.

[0008] In some embodiments, the first end of the connector is provided with an external thread, and the end of the first actuating member is provided with a threaded groove that mates with the external thread.

[0009] In some embodiments, the threaded groove is a through-hole groove.

[0010] In some embodiments, the second actuating element is gap-fitted onto the connector.

[0011] In some embodiments, the inner wall of the second actuator is formed as a smooth inner wall.

[0012] In some embodiments, the connector is further provided with a limiting shoulder, which together with the limiting member in the axial direction supports and limits the second actuating member.

[0013] In some embodiments, the limiting shoulder and the connector are formed as an integral structure.

[0014] In some embodiments, the limiting member and the second end of the connecting member are threaded, snap-fitted, and / or interference-fitted.

[0015] In some embodiments, the first movable mechanism includes a push rod, and the first actuating element is provided with a dial for directly or indirectly engaging the push rod; and / or, the second movable mechanism includes a fork, and the second actuating element is provided with a dial for engaging the fork.

[0016] In some embodiments, the first actuating element is configured to cooperate directly or indirectly with the first movable mechanism, the first actuating element being limited or released by the first movable mechanism; and / or, the second actuating element being detached from the second movable mechanism or driving the second movable mechanism to move.

[0017] According to another aspect of this application, a brake signal transmitter is provided, comprising: a drive bracket connected to a push rod; a magnetic rod connected to the drive bracket and capable of being driven by the drive bracket; a sensor cooperating with the magnetic rod; a switch actuation mechanism as described in any of the above embodiments, axially movable and mounted in a slide of the brake signal transmitter, wherein a first actuating element of the switch actuation mechanism cooperates with the drive bracket, and the drive bracket can limit or release the first actuating element; a shift fork cooperating with a second actuating element of the switch actuation mechanism; a switch cooperating with the shift fork; and a spring configured to apply a force to the switch actuation mechanism causing the second actuating element to move toward the shift fork.

[0018] In some embodiments, under braking conditions, the drive bracket moves with the push rod and drives the magnetic rod to move, and the sensor senses the movement state of the magnetic rod; under braking conditions, the drive bracket also releases the first actuating member, and the switch actuating mechanism moves under the action of the spring until the second actuating member moves the shift fork, so that the shift fork contacts the contact of the switch.

[0019] The beneficial effects of this application compared to the prior art may include at least some of the following:

[0020] This application utilizes a design where the first actuating element is threadedly connected to the connecting element, the second actuating element is fitted with the connecting element with a clearance, and the limiting element supports and limits the second actuating element in the axial direction. This design facilitates the adjustment of the position of the second actuating element by rotating the connecting element during the assembly of the switch actuating mechanism to the brake signal transmitter, and ensures the stability and reliability of the switch actuating mechanism after assembly.

[0021] Specifically, during the assembly of the switch actuation mechanism into the slide of the brake signal transmitter, the first actuating element is held stationary by the first movable mechanism of the brake signal transmitter, while the positional relationship between the second actuating element and the second movable mechanism needs adjustment. At this point, the connecting member can be rotated to drive the limiting member, and subsequently the second actuating element, supported and limited by the limiting member, to move axially. This ensures that the positional relationship between the second actuating element and the second movable mechanism meets design requirements, guaranteeing effective cooperation between them. During operation, the switch actuation mechanism needs to move axially along the slide to trigger or disengage the switch of the brake signal transmitter. Thanks to the threaded connection between the first actuating element and the connecting member, and the structure where the second actuating element is supported and limited axially by the limiting member, the switch actuation mechanism remains stable and reliable during operation, preventing component misalignment.

[0022] Therefore, the switch actuation mechanism of this application can effectively solve the bias problem of the switch actuation mechanism during operation while realizing the assembly and debugging function of the switch actuation mechanism, avoid friction and jamming between the switch actuation mechanism and other components of the brake signal transmitter, ensure the reliability of the switch actuation mechanism and the product function, and thus ensure the normal operation of the brake signal transmitter.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0025] Figure 1 This diagram shows a schematic representation of the switch actuation mechanism in an embodiment of this application.

[0026] Figure 2 This diagram shows a schematic of the switch actuation mechanism assembled in the brake signal transmitter in an embodiment of this application.

[0027] Figure 3 A schematic diagram of the structure at the position of the magnetic rod of the braking signal transmitter in an embodiment of this application is shown. Detailed Implementation

[0028] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0029] The accompanying drawings are merely illustrative of this application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar structures, and therefore, repeated descriptions of them will be omitted.

[0030] The use of terms such as "first," "second," and similar words in the specific description does not indicate any order, quantity, or importance, but is merely used to distinguish different components. The terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, in the description of this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two elements.

[0031] It should be noted that, unless otherwise specified, the embodiments of this application and the features in different embodiments can be combined with each other.

[0032] Figure 1 The diagram illustrates the structure of the switch actuation mechanism in an embodiment of this application. Figure 2 This illustration shows the structure of the switch actuation mechanism assembled in the brake signal transmitter in an embodiment of this application; combined with Figure 1 and Figure 2 As shown, the switch actuation mechanism 100 for a brake signal transmitter provided in this application embodiment may include:

[0033] The first actuating element 110 can change its state with the movement of the first movable mechanism of the brake signal transmitter, such as the push rod 210. The first actuating element 110 may be provided with a dial 111 for cooperating with the first movable mechanism, such as the push rod 210.

[0034] The second actuating member 120 can change the state of the second movable mechanism of the brake signal transmitter, such as the shift fork 300. The second actuating member 120 may be provided with a dial 121 for cooperating with the second movable mechanism, such as the shift fork 300.

[0035] The connector 130 connects the first actuating member 110 and the second actuating member 120, wherein the first actuating member 110 and the connector 130 are threadedly connected, and the second actuating member 120 and the connector 130 are fitted together with a gap.

[0036] The limiting member 140 is connected to the connecting member 130, and the second actuating member 120 is limited by the limiting member 140 at least in the axial direction Z.

[0037] The first movable mechanism may include a push rod 210, and may further include a drive bracket 220 directly or indirectly connected to the push rod, but is not limited thereto. The first movable mechanism may also be other moving parts of the brake signal transmitter. The cooperation relationship between the first actuating element 110 and the first movable mechanism may be direct cooperation (e.g., the first actuating element 110 directly cooperates with the push rod 210) or indirect cooperation (e.g., the first actuating element 110 cooperates with the push rod 210 through the drive bracket 220). The actuation relationship between the first actuating element 110 and the first movable mechanism may be that the first actuating element 110 is limited by the first movable mechanism in the non-braking state, and the first actuating element 110 is released by the first movable mechanism in the braking state, i.e., the limitation is lifted so that the switch actuating mechanism 100 can move, but is not limited thereto, as long as the state of the first actuating element 110 can change with the movement of the first movable mechanism. For example, the actuation relationship between the first actuating member 110 and the first movable mechanism can be such that the first movable mechanism drives the first actuating member 110 to move in the braking state, and the two separate in the non-braking state.

[0038] The second movable mechanism may include, but is not limited to, the shift fork 300, and may also be other moving parts of the brake signal transmitter. The cooperation relationship between the second actuating element 120 and the second movable mechanism can be direct (e.g., the second actuating element 120 directly cooperates with the shift fork 300) or indirect (e.g., the second actuating element 120 cooperates with the shift fork 300 through other components). The actuation relationship between the second actuating element 120 and the second movable mechanism can be that they are separated in the non-braking state, and in the braking state, the second actuating element 120 contacts and drives the second movable mechanism to move, but this is not limited, as long as the second actuating element 120 can change the state of the second movable mechanism. For example, the actuation relationship between the second actuating element 120 and the second movable mechanism can also be that in the non-braking state, the second actuating element 120 limits the second movable mechanism, and in the braking state, the second actuating element 120 releases the second movable mechanism so that the second movable mechanism moves to trigger the switch of the brake signal transmitter.

[0039] This application utilizes a design where the first actuating element 110 is threadedly connected to the connecting element 130, the second actuating element 120 is fitted with the connecting element 130 with a clearance, and the limiting element 140 supports and limits the second actuating element 120 in the axial Z direction. This design facilitates the adjustment of the position of the second actuating element 120 by rotating the connecting element 130 during the assembly of the switch actuating mechanism 100 to the brake signal transmitter, and ensures the stability and reliability of the switch actuating mechanism 100 after assembly.

[0040] Specifically, during the assembly of the switch actuation mechanism 100 to the slide rail 100' of the brake signal transmitter, the first actuating element 110 (e.g., via a dial 111) is kept stationary by the first movable mechanism of the brake signal transmitter, while the positional relationship between the second actuating element 120 and the second movable mechanism needs adjustment. At this time, by rotating the connecting member 130, the limiting member 140 is driven, thereby causing the second actuating element 120, supported and limited by the limiting member 140, to move along the axial direction Z, so that the positional relationship between the dial 121 of the second actuating element 120 and the second movable mechanism meets the design requirements, thus ensuring effective cooperation between the two. During operation, the switch actuation mechanism 100 needs to move axially along the slide rail 100' to trigger the switch 520 of the brake signal transmitter. Thanks to the threaded connection between the first actuating element 110 and the connecting element 130, and the structure in which the second actuating element 120 is supported and limited by the limiting element 140 in the axial Z direction, the switch actuating mechanism 100 remains stable and reliable during operation, avoiding problems such as displacement or offset between components.

[0041] Therefore, the switch actuation mechanism 100 of this application can effectively solve problems such as displacement and offset between components after assembly while realizing the assembly and debugging functions, and avoid friction and jamming between the switch actuation mechanism 100 and other components of the brake signal transmitter (mainly referring to the slide rail 100') during operation. During operation, when the cooperation state between the first actuating member 110 and the first movable mechanism changes, the switch actuation mechanism 100 moves as an integral component, causing the second actuating member 120 to move the second movable mechanism to trigger the switch 520 of the brake signal transmitter, ensuring the reliability of the switch actuation mechanism 100 and the product function, thereby ensuring the normal operation of the brake signal transmitter.

[0042] Before the switch actuation mechanism 100 is assembled to the brake signal transmitter, the switch actuation mechanism 100 can be formed as a whole by assembling the connector 130 with the first actuating member 110, assembling the second actuating member 120 with the connector 130, and assembling the limiting member 140 with the connector 130. Then the switch actuation mechanism 100 is assembled into the slide rail 100' of the brake signal transmitter.

[0043] The first actuating element 110, the second actuating element 120, and the connecting element 130 can be formed into rod-shaped structures. The first actuating element 110 and the second actuating element 120 can be connected to the connecting element 130 by means of interlocking, but this is not a limitation. Depending on different design requirements and application requirements in different types of brake signal transmitters, the first actuating element 110, the second actuating element 120, and the connecting element 130 can also be formed into other shapes and structures.

[0044] The threaded connection between the first actuating element 110 and the connecting element 130 not only achieves stable and convenient fixing, avoiding the misalignment and wobbling caused by ball joint connections, but also facilitates the adjustment of the position of the second actuating element 120 by rotating the connecting element 130, and simplifies the manufacturing process, resulting in more stable part quality. One specific way to achieve the threaded connection between the first actuating element 110 and the connecting element 130 is, for example, that the first end 130a of the connecting element 130 is provided with an external thread, and the end of the first actuating element 110 is provided with a matching threaded groove 110a, but this is not a limitation. For example, in some cases, a threaded groove may be provided at the first end 130a of the connecting element 130, and the end of the first actuating element 110 may be provided with a matching external thread.

[0045] In some embodiments, the threaded groove 110a of the first actuating member 110 is a through-hole groove, which facilitates the insertion of a screwdriver into the slide rail 100' during assembly, passing through the threaded groove 110a to rotate the connecting member 130. After the position of the second actuating member 120 is adjusted, a plug 800 can be installed at the top of the slide rail 100'.

[0046] In some embodiments, the second actuating member 120 is loosely fitted onto the connecting member 130, allowing the connecting member 130 to rotate relative to the second actuating member 120, thereby facilitating the adjustment of the positional relationship between the dial 121 of the second actuating member 120 and the second movable mechanism. Furthermore, the inner wall of the second actuating member 120 can be formed as a smooth inner wall to facilitate manufacturing, eliminating the need for machining threads or other mating structures on the inner wall of the second actuating member 120, and facilitating the relative rotational engagement between the second actuating member 120 and the connecting member 130.

[0047] In some embodiments, the limiting member 140 is fixedly connected to the second end 130b of the connecting member 130; the connecting member 130 is also provided with a limiting shoulder 130c, the limiting shoulder 130c and the limiting member 140 jointly support and limit the second actuating member 120 in the axial Z direction, thereby achieving reliable support and limiting of the second actuating member 120, preventing the second actuating member 120 from moving in the axial Z direction during operation and affecting the cooperation between its dial 121 and the second movable mechanism, and facilitating accurate adjustment of the positional relationship between the dial 121 of the second actuating member 120 and the second movable mechanism during assembly.

[0048] In some embodiments, the limiting shoulder 130c and the connector 130 are formed as an integral structure, which can improve structural strength, reduce the number of parts, and reduce assembly complexity.

[0049] In some embodiments, the limiting member 140 and the second end 130b of the connecting member 130 can be stably fitted by one or more of the following methods: threaded connection, snap-fit ​​connection, and interference fit.

[0050] This application also provides a braking signal transmitter. Figure 3 The diagram illustrates the structure at the location of the magnetic rod in the brake signal transmitter, combined with... Figures 1 to 3 As shown, the braking signal transmitter provided in this application embodiment may include:

[0051] The drive bracket 220 is connected to the push rod 210;

[0052] The magnetic rod 400 is connected to the drive bracket 220 and can be driven to move by the drive bracket 220;

[0053] Sensor 510, in conjunction with magnetic rod 400;

[0054] The switch actuation mechanism 100 is axially movable and mounted in the slide rail 100' of the brake signal transmitter. The switch actuation mechanism 100 cooperates with the drive bracket 220 through the first actuating element 110. The drive bracket 220 can limit or release the first actuating element 110.

[0055] The shift fork 300 cooperates with the second actuating element 120 of the switch actuating mechanism 100;

[0056] Switch 520, used in conjunction with shift fork 300;

[0057] Spring 600 is configured to apply a force to switch actuation mechanism 100 to move the dial 121 of second actuator 120 toward fork 300.

[0058] The push rod 210 can be connected to the brake pedal. When the brake pedal is depressed, it will drive the push rod 210 to move along the Z-axis, which is downward in terms of the drawing direction. In the initial state, that is, when the push rod 210 has not moved downward, the magnetic rod 400 remains stationary, and the drive bracket 220 limits the first actuating element 110. The second actuating element 120 is spaced apart from the shift fork 300, and the shift fork 300 is spaced apart from the switch 520.

[0059] When the driver depresses the brake pedal, the push rod 210 moves downward, causing the drive bracket 220 to move downward, which in turn causes the magnetic rod 400 to move downward. The sensor 510 of the brake signal transmitter transmits the motion status information (including stroke and speed) of the magnetic rod 400 to the control unit, such as the vehicle ECU, in the form of a pulse width modulation signal through a specific pin of the control unit. Based on the received pulse width modulation signal, the control unit, such as the vehicle ECU, can calculate the required braking pressure and achieve precise braking pressure distribution by controlling the braking modules of the front and rear axles, thereby achieving vehicle braking.

[0060] As the drive bracket 220 moves the magnetic rod 400 downwards, it releases the limit on the first actuating member 110 of the switch actuation mechanism 100. The switch actuation mechanism 100 then moves downwards under the push of the spring 600, causing the dial 121 of the second actuating member 120 to contact the shift fork 300, rotating the shift fork 300 counter-clockwise (as shown in the drawing). With this counter-clockwise rotation, the lower end of the shift fork 300 contacts the contact of the switch 520 in the brake signal transmitter, pushing the contact to open the switch 520. The switch 520 signal is then transmitted to the control unit, such as the vehicle ECU, through a specific pin of the brake signal transmitter. The sensor 510, the switch 520, and the pins used to transmit the sensing signal from the sensor 510 and the switching signal from the switch 520, respectively, can be integrated into the control unit 500 of the brake signal transmitter. Based on the received switch signal, the control unit, such as the vehicle ECU, can control the activation of braking-related functions (such as brake lights and auxiliary braking) on ​​the vehicle.

[0061] The brake signal transmitter is equipped with the aforementioned switch triggering mechanism 100. When the switch triggering mechanism 100 moves, it can effectively avoid friction or even jamming with the slide rail 100', ensuring that the switch 520 is effectively triggered under the action of the spring 600, improving reliability, and thus ensuring the normal operation of the brake signal transmitter.

[0062] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A switch actuation mechanism for a brake signal transmitter, the switch actuation mechanism comprising a first actuating member capable of changing state with movement of a first movable mechanism of the brake signal transmitter, a second actuating member capable of changing state of a second movable mechanism of the brake signal transmitter, and a connecting member connecting the first actuating member and the second actuating member, characterized in that: The first actuating element is threadedly connected to the connecting element, and the second actuating element is loosely fitted to the connecting element. The switch actuation mechanism further includes a limiting member, which is connected to the connecting member, and the second actuating member is supported and limited axially by the limiting member.

2. The switch actuation mechanism as described in claim 1, characterized in that, The first end of the connector is provided with an external thread, and the end of the first actuating member is provided with a threaded groove that mates with the external thread.

3. The switch actuation mechanism as described in claim 2, characterized in that, The threaded groove is a through-hole groove.

4. The switch actuation mechanism as described in claim 1, characterized in that, The second actuating element is gap-fitted onto the connecting element.

5. The switch actuation mechanism as described in claim 4, characterized in that, The inner wall of the second actuating element is formed as a smooth inner wall.

6. The switch actuation mechanism as described in claim 1, characterized in that, The connector is also provided with a limiting shoulder, which together with the limiting member in the axial direction supports and limits the second actuating member.

7. The switch actuation mechanism as described in claim 6, characterized in that, The limiting shoulder and the connecting member are integrally formed.

8. The switch actuation mechanism as described in claim 1, characterized in that, The limiting member and the second end of the connecting member are connected by a thread, a snap-fit, and / or an interference fit.

9. The switch actuation mechanism as described in claim 1, characterized in that, The first movable mechanism includes a push rod, and the first actuating element is provided with a dial for directly or indirectly cooperating with the push rod; And / or, the second movable mechanism includes a shift fork, and the second actuating element is provided with a shift head for cooperating with the shift fork.

10. The switch actuation mechanism as described in any one of claims 1 to 9, characterized in that, The first actuating element is configured to cooperate directly or indirectly with the first movable mechanism, and the first actuating element can be limited or released by the first movable mechanism; and / or The second actuating element can be separated from the second movable mechanism or drive the second movable mechanism to move.

11. A braking signal transmitter, characterized in that, include: Drive bracket, connected to top rod; The magnetic rod is connected to the drive bracket and can be driven to move by the drive bracket. The sensor, in conjunction with the magnetic rod; The switch actuation mechanism as described in any one of claims 1 to 10 is axially movable and mounted in the slide of the brake signal transmitter, wherein the first actuating element of the switch actuation mechanism cooperates with the drive bracket, and the drive bracket can limit or release the first actuating element; The shift fork cooperates with the second actuating element of the switch actuation mechanism; The switch engages with the fork. A spring is configured to apply a force to the switch actuation mechanism to move the second actuating element toward the fork.

12. The braking signal transmitter as claimed in claim 11, characterized in that, In the braking state, the drive bracket moves with the push rod and drives the magnetic rod to move, and the sensor senses the motion state of the magnetic rod; In the braking state, the drive bracket also releases the first actuating element, and the switch actuating mechanism moves under the action of the spring until the second actuating element moves the shift fork, causing the shift fork to contact the switch contact.

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