Bypass disconnecting link monitoring device

Abstract

The utility model provides a bypass disconnecting link monitoring device. The bypass disconnecting link monitoring device comprises a shell and a disconnecting link assembly. The disconnecting link assembly comprises a rotating shaft, a driving component and two cams, the rotating shaft penetrates through the shell and is rotationally connected with the shell, and the driving component and the two cams are fixedly connected with the rotating shaft; a first switch assembly used for detecting the on-off state of the disconnecting link assembly is installed in the shell, a second switch assembly used for detecting the abnormal state of the first switch assembly is installed outside the shell, and the first switch assembly and the second switch assembly are electrically connected with the monitoring module. One of the two groups of cams is propped against the first switch assembly, the other group of cams is propped against the second switch assembly, and the two groups of cams drive the first switch assembly and the second switch assembly to synchronously open and close through respective convex parts; whether the bypass knife switch is switched in place or not can be judged by using the first switch assembly and the second switch assembly, the problem of overtime starting or switching failure of the SFC system is avoided, and the operation safety and reliability of the SFC system are improved.

Description

Technical Field

[0001] This application relates to the field of disconnect switch technology, and in particular to a bypass disconnect switch monitoring device. Background Technology

[0002] The SFC (Static Frequency Converter) system is a crucial control mechanism in power plants, used during the startup process of reversible units in large pumped-storage power plants. It ensures the unit smoothly transitions from a standstill to its rated speed, achieving shock-free grid connection and flexibly stabilizing at the set speed. The SFC system is equipped with a bypass switch to ensure its safe operation. This bypass switch can quickly switch to a backup power source or equipment during SFC system maintenance or failure, guaranteeing continuous power supply. However, due to the lack of reliable monitoring methods for the bypass switch switching status, incomplete switching may lead to SFC system startup timeouts or switching failures, thus affecting its normal operation.

[0003] ‌ Utility Model Content

[0004] In view of this, the present application aims to provide a bypass switch monitoring device to solve some or all of the above-mentioned technical problems.

[0005] For the purposes described above, this application provides a bypass switch monitoring device, including a housing and a switch assembly;

[0006] The knife switch assembly includes a rotating shaft, a driving component, and two sets of cams. The rotating shaft passes through the housing and is rotatably connected to it. The driving component and the two sets of cams are all fixedly connected to the rotating shaft.

[0007] The housing contains a first switch assembly for detecting the on / off state of the knife switch assembly, and the housing contains a second switch assembly for detecting abnormal states of the first switch assembly. The first switch assembly and the second switch assembly are electrically connected to the monitoring module.

[0008] One of the two sets of cams abuts against the first switch assembly, and the other abuts against the second switch assembly, and the two cams drive the first switch assembly and the second switch assembly to open and close synchronously through their respective protrusions.

[0009] As can be seen from the above, the bypass switch monitoring device provided in this application has a first switch assembly installed inside the housing to monitor the on / off state of the switch assembly and determine whether the bypass switch has been switched to the correct position. A second switch assembly installed outside the housing can detect whether the first switch assembly is faulty, improving the reliability of monitoring the status of the switch assembly. When the switch assembly switches to the closed state, the raised parts of the two sets of cams can simultaneously trigger the first and second switch assemblies, making the monitoring module conductive. Users can judge whether the bypass switch has been switched to the correct position through the prompt signal issued by the monitoring module, avoiding the problem of SFC system start-up timeout or switching failure due to incomplete switching, and improving the safety and reliability of SFC system operation. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the bypass switch monitoring device in the embodiments of this application;

[0012] Figure 2 This is a schematic diagram showing the positions of the first and second switch components in an embodiment of this application (with a partial cross-sectional view of the cover).

[0013] Figure 3 This is a schematic diagram of the first switch assembly in an embodiment of this application;

[0014] Figure 4 This is a schematic diagram of the second switch assembly in an embodiment of this application;

[0015] Figure 5 This is a schematic diagram showing the connection between the first switch assembly and the first mounting structure in an embodiment of this application;

[0016] Figure 6 This is a schematic diagram showing the connection between the second switch assembly and the first mounting structure in an embodiment of this application.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Shell;

[0019] 2. Knife switch assembly; 210. Rotary shaft; 220. Drive component; 230. Cam;

[0020] 301. First switch assembly; 302. Second switch assembly; 310. Switch body; 311. Resilient contact; 320. Connector; 330. Roller;

[0021] 4. First mounting structure; 401. Elongated hole; 410. Limit cap; 420. First screw; 430. First pressure plate; 440. First tightening component;

[0022] 5. Second mounting structure; 510. Second screw; 520. Second pressure plate; 530. Second tightening component; 540. Cover;

[0023] 6. Cover. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] This application provides a bypass disconnector monitoring device, combined with Figures 1-6 The content shown provides a detailed description of the bypass switch monitoring device.

[0027] A bypass switch monitoring device includes a housing 1 and a switch assembly 2. The switch assembly 2 includes a rotating shaft 210, a driving member 220, and two sets of cams 230. The rotating shaft 210 passes through the housing 1 and is rotatably connected to it. The driving member 220 and the two sets of cams 230 are all fixedly connected to the rotating shaft 210. A first switch assembly 301 for detecting the on / off state of the switch assembly 2 is installed inside the housing 1, and a second switch assembly 302 for detecting abnormal states of the first switch assembly 301 is installed outside the housing 1. The first switch assembly 301 and the second switch assembly 302 are respectively electrically connected to a monitoring module. One of the two sets of cams 230 abuts against the first switch assembly 301, and the other abuts against the second switch assembly 302. The two cams drive the first switch assembly 301 and the second switch assembly 302 to open and close synchronously through their respective protruding parts.

[0028] Specifically, when the SFC system malfunctions or is under maintenance, the safety of the SFC system can be ensured by switching the on / off state of the bypass switch. For example, when the SFC system malfunctions, the control switch assembly 2 switches the bypass switch to the closed state, which allows the SFC system to be connected to the backup power supply or equipment, maintaining the continuous operation of the SFC system.

[0029] Further, please refer to Figure 2 The bypass switch assembly 2, used to control the on / off state of the bypass switch, may include a rotating shaft 210 rotatably connected to the housing 1, a driving member 220 for driving the rotating shaft 210 to rotate, and two sets of cams 230 fixed on the rotating shaft 210. Furthermore, when the bypass switch assembly 2 controls the on / off state of the bypass switch, the driving member 220 drives the rotating shaft 210 to rotate, so that the two sets of cams 230 on the rotating shaft 210 rotate synchronously, so as to drive the first switch assembly 301 and the second switch assembly 302 through the rotating cams 230 and control their opening and closing states.

[0030] Further, please refer to Figure 2 The housing 1 contains a first switch assembly 301 electrically connected to the monitoring module, used to detect the on / off state of the switch assembly 2. When the bypass switch is switched to the closed state through the switch assembly 2, the cam 230 in the switch assembly 2 rotates synchronously, causing its protruding part to abut against the first switch assembly 301 and drive it to switch to the open state, so that the monitoring module is turned on and sends out a first prompt signal. The first prompt signal indicates that the bypass switch has been switched to the correct position, thereby realizing the monitoring of the status of the switch assembly 2. This helps to improve the reliability of the bypass switch switching status judgment and ensure the safety of the SFC system operation.

[0031] Further, please refer to Figure 2 A second switch assembly 302, electrically connected to the monitoring module, is installed outside the housing 1. Besides monitoring the on / off state of the disconnector assembly 2, it can also detect whether the first switch assembly 301 is faulty. When the bypass disconnector is switched to the closed state via the disconnector assembly 2, the cam 230 in the disconnector assembly 2 rotates synchronously, causing its protruding part to abut against the second switch assembly 302 and drive it to switch to the open state. This activates the monitoring module and sends a second prompt signal. On one hand, the first prompt signal indicates that the bypass disconnector has been switched to the correct position, thus monitoring the switching status of the bypass disconnector. On the other hand, when the cam 230 drives the second switch assembly 302 to the open state, the issuance of the first prompt signal can verify whether the first switch assembly 301 is faulty, improving the reliability of the status inspection of the disconnector assembly 2.

[0032] For example, when the protruding part of the corresponding cam 230 abuts against the second switch assembly 302, the opening and closing state of the second switch assembly 302 located outside the housing 1 can be easily observed; if the monitoring module fails to be turned on after the second switch assembly 302 switches to the open state and cannot generate the second prompt signal, it indicates that the second switch assembly 302 is faulty.

[0033] For example, when both the first switch assembly 301 and the second switch assembly 302 can enable the corresponding monitoring module to conduct, and the monitoring module issues the first prompt signal and the second prompt signal, it indicates that the disconnector assembly 2 has been switched to the position, that is, the bypass disconnector has been switched to the closed state, and the first switch assembly 301 is normal at this time.

[0034] For example, if only the second switch assembly 302 can be connected to the monitoring module and issue a second prompt signal, it indicates that the bypass switch is switched to the correct position and is in a closed state. If the monitoring module, which is electrically connected to the first switch assembly 301, cannot generate a first prompt signal, it indicates that the first switch assembly 301 is faulty.

[0035] Furthermore, the monitoring module is used to issue corresponding prompt signals based on the on / off state of the first switch component 301 and the second switch component 302; wherein, the monitoring module may include at least one of an indicator light, a sound module and a display unit, and the first prompt signal and the second prompt signal issued by it may be light, sound, image and text, etc., which will not be described in detail here.

[0036] Furthermore, the bypass switch monitoring device can use two monitoring modules, one of which is electrically connected to the first switch assembly 301 and the other is electrically connected to the second switch assembly 302, reducing the difficulty of distinguishing between the first and second prompt signals.

[0037] In some embodiments, the first switch assembly 301 and the second switch assembly 302 both include a switch body 310 and a connector 320. The switch body 310 is provided with an elastic contact 311 on the side facing the cam 230 for triggering the opening and closing state of the switch body 310. The connector 320 abuts against the elastic contact 311, and one end of the connector 320 is rotatably connected to the switch body 310. In this way, the position of the elastic contact 311 is controlled by squeezing or releasing the connector 320, thereby controlling the opening and closing state of the first switch assembly 301 and the second switch assembly 302.

[0038] Specifically, please refer to Figures 2-6When the bypass switch is switched to the closed state, the rotating shaft 210 will drive the cam 230 to rotate synchronously. When the protrusion of the cam 230 rotates to the connector 320, the connector 320 will move towards the switch body 310 along the connection position with the switch body 310 and apply pressure to the elastic contact 311, thereby triggering the switch body 310 to open. When the connector 320 performs this action, it can make the monitoring module conduct, so that the monitoring module can determine the on / off state of the bypass switch.

[0039] In some embodiments, the first switch assembly 301 and the second switch assembly 302 further include a roller 330, which is rotatably connected to the other end of the connector 320 and travels on the peripheral wall of the cam 230.

[0040] Specifically, please refer to Figures 2-6 By setting a roller 330 at the end of the connector 320 away from the connection position, and making it roll along the peripheral wall of the cam 230, the frictional resistance when the surface of the cam 230 drives the first switch assembly 301 and the second switch assembly 302 can be effectively reduced, so that the triggering action of the cam 230 is smoother.

[0041] Furthermore, the end of the connector 320 can be connected to the switch body 310 via a damping shaft. This way, when the protruding part of the cam 230 disengages from the roller 330, the elastic contact 311 can rebound and maintain contact with the connector 320, while ensuring that the peripheral wall of the cam 230 always abuts against the roller 330, thus ensuring that the opening and closing states of the first switch assembly 301 and the second switch assembly 320 are synchronized.

[0042] In some embodiments, the operating conditions of the knife switch assembly 2 include a first operating condition and a second operating condition. In the first operating condition, the rollers 330 of the first switch assembly 301 and the second switch assembly 302 abut against the protruding portions of the two sets of cams 230, so as to switch the first switch assembly 301 and the second switch assembly 302 to the open state by pressing the elastic contact 311. Specifically, when the knife switch assembly 2 is in the first operating condition, its shaft 210 drives the cams 230 to rotate synchronously, so that the protruding portions of the two cams 230 abut against the surfaces of the rollers 330 of the first switch assembly 301 and the second switch assembly 302 respectively, so as to apply pressure to the elastic contact 311 through the connector 320 connected to the cams 230, so as to open the first switch assembly 301 and the second switch assembly 302 simultaneously and turn on the monitoring module.

[0043] Furthermore, in the second operating condition, the rollers 330 of the first switch assembly 301 and the second switch assembly 302 separate from the protruding portions of the two sets of cams 230, so that the first switch assembly 301 and the second switch assembly 302 are switched to the closed state by releasing the elastic contact 311. Specifically, when the knife switch assembly 2 is in the second operating condition, its shaft 210 drives the cams 230 to rotate synchronously, so that the protruding portions of the two cams 230 separate from the surfaces of the rollers 330 of the first switch assembly 301 and the second switch assembly 302, and the pressure applied to the connecting member 320 is removed. The elastic contact 311, which has lost pressure, pops out again, so that the first switch assembly 301 and the second switch assembly 302 are switched to the closed state simultaneously.

[0044] In some embodiments, the first switch assembly 301 is fixedly connected to the housing 1 via a first mounting structure 4. The first mounting structure 4 includes a limiting cap 410, a first screw 420, a first pressure plate 430, and a first tightening member 440. The limiting cap 410 is connected to the end of the first screw 420, which sequentially passes through the side wall of the housing 1, the first switch assembly 301, and the first pressure plate 430. The first switch assembly 301 is located between the side wall of the housing 1 and the first pressure plate 430. The first tightening member 440 is screwed onto the first screw 420 to press the first switch assembly 301 against the housing 1 via the first pressure plate 430. By using the first mounting structure 4 to fix the first switch assembly 301 inside the housing 1, the installation firmness of the first switch assembly 301 is improved, while also reducing the installation difficulty of the first switch assembly 301.

[0045] Specifically, please refer to Figure 3 and Figure 5 The first screw 420 passes through the side wall of the housing 1, the first switch assembly 301, and the first pressure plate 430 in sequence, providing an installation position for the first switch assembly 301. The limiting cap 410 is fixed to the end of the first screw 420 to limit the axial position of the first screw 420 on the side wall of the housing 1. When installing the first switch assembly 301, the first screw 420 is first passed through the side wall of the housing 1 and extended into the housing 1, and then passed through the first switch assembly 301 and the first pressure plate 430 in sequence, ensuring that the elastic contact 311 of the first switch assembly 301 faces the corresponding cam 230 and is located between the side wall of the housing 1 and the first pressure plate 430. Then, the first tightening member 440 is screwed into the other end of the first screw 420. As the first tightening member 440 is continuously screwed in, the first pressure plate 430 and the side wall of the housing 1 can clamp and fix the first switch assembly 301 to achieve the fixation of the first switch assembly 301.

[0046] In some embodiments, the side wall of the housing 1 has an elongated hole 401 extending along the length of the housing 1, and the first screw 420 passes through the elongated hole 401. (See also...) Figure 2The internal space of the housing 1 is small, making it difficult to adjust the position of the first switch assembly 301. Therefore, an elongated hole 401 extending along the length direction is opened on the side wall of the housing 1 to reduce the difficulty of adjusting the first switch assembly 301. Specifically, after the first screw 420 passes through the elongated hole 401, the first switch assembly 301 is initially assembled by the first tightening member 440 and the first pressure plate 430. The first screw 420 is slid along the extension direction of the elongated hole 401 to move the first switch assembly 301 and adjust its relative distance with the cam 230. After the first switch assembly 301 is adjusted to the appropriate position, the first tightening member 440 is tightened to fix the first switch assembly 301. This not only reduces the difficulty of adjustment but also ensures the triggering accuracy of the cam 230 on the first switch assembly 301.

[0047] In some embodiments, the second switch assembly 302 is fixedly connected to the housing 1 via a second mounting structure 5. The second mounting structure 5 includes a second screw 510, a second pressure plate 520, and a second tightening member 530. The end of the second screw 510 is fixedly connected to the side wall of the housing 1 and passes through the second switch assembly 302 and the second pressure plate 520 in sequence. The second switch assembly 302 is located between the side wall of the housing 1 and the second pressure plate 520. The second tightening member 530 is screwed onto the second screw 510 to press the second switch assembly 302 onto the housing 1 via the second pressure plate 520. By providing the second mounting structure 5 outside the housing 1, the firmness of the first switch assembly 301 installed inside the housing 1 can be improved, and the installation difficulty of the first switch assembly 301 inside the housing 1 can be reduced.

[0048] Specifically, please refer to Figure 4 and Figure 6 The second screw 510 is fixedly connected to the outer wall of the housing 1 and passes through the second switch assembly 302 and the second pressure plate 520 in sequence to provide an installation position for the second switch assembly 302. When installing the second switch assembly 302, the second switch assembly 302 and the second pressure plate 520 are first sleeved on the second screw 510, ensuring that the elastic contact 311 of the second switch assembly 302 faces the corresponding cam 230, so that it is located between the side wall of the housing 1 and the second pressure plate 520; then, the second tightening member 530 is screwed into the other end of the second screw 510. As the second tightening member 530 is screwed in, it gradually presses against the second pressure plate 520. The second switch assembly 302 is fixed by the clamping action of the second pressure plate 520 and the side wall of the housing 1, ensuring the precise fit between the switch assembly and the cam 230.

[0049] It should be noted that the second switch assembly 302 is installed outside the housing 1 with sufficient operating space, so there is no need to open connection holes on the side wall of the housing 1, thereby maintaining the structural integrity of the side wall of the housing 1.

[0050] In some embodiments, participate Figure 2 , Figure 4 and Figure 6 The second mounting structure 5 also includes a cover 540; the cover 540 covers the outside of the second switch assembly 302 and is used to protect the second switch assembly 302 and the second mounting structure 5; after the second switch assembly 302 and the second pressure plate 520 are fixed, the second screw 510 can be passed through the cover 540, and the cover 540 can be pressed tightly against the surface of the second pressure plate 520 by tightening the second tightening member 530. This installation method not only ensures the stable fixing of the cover 540, but also simplifies the installation process and effectively improves the assembly efficiency.

[0051] Furthermore, the cover 540 is made of transparent material, which can effectively protect the second switch assembly 302 and make it easy for users to directly observe its opening and closing status.

[0052] For example, the cover 540 is made of acrylic material, which has both excellent protective performance and light transmission properties.

[0053] In some embodiments, participate Figure 1 and Figure 2 The bypass switch monitoring device also includes a cover 6; the cover 6 is connected to the housing 1 and forms a receiving cavity, and the first switch assembly 301 and the corresponding cam 230 are located in the receiving cavity, so as to effectively protect the first switch assembly 301 and the corresponding cam 230 in the receiving cavity through the cover 6.

[0054] For example, the housing 1 and the cover 6 can be connected by fasteners such as screws to ensure the strength of the connection between them.

[0055] For example, the housing 1 and the cover 6 can be connected by a snap-fit ​​structure, which reduces the difficulty of connecting the two and makes them easy to disassemble.

[0056] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0057] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0058] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0059] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0060] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0061] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A bypass switch monitoring device, characterized in that, Includes housing and disconnector assembly; The knife switch assembly includes a rotating shaft, a driving component, and two sets of cams. The rotating shaft passes through the housing and is rotatably connected to it. The driving component and the two sets of cams are all fixedly connected to the rotating shaft. The housing contains a first switch assembly for detecting the on / off state of the knife switch assembly, and the housing contains a second switch assembly for detecting abnormal states of the first switch assembly. The first switch assembly and the second switch assembly are respectively electrically connected to the monitoring module. One of the two sets of cams abuts against the first switch assembly, and the other abuts against the second switch assembly, and the two cams drive the first switch assembly and the second switch assembly to open and close synchronously through their respective protrusions.

2. The bypass switch monitoring device according to claim 1, characterized in that, Both the first switch assembly and the second switch assembly include a switch body and a connector; The switch body has an elastic contact on the side facing the cam, the connector abuts against the elastic contact, and one end of the connector is rotatably connected to the switch body.

3. The bypass switch monitoring device according to claim 2, characterized in that, The first switch assembly and the second switch assembly also include a roller. The roller is rotatably connected to the other end of the connector and travels along the peripheral wall of the cam.

4. The bypass switch monitoring device according to claim 3, characterized in that, The operating conditions of the disconnector assembly include a first operating condition and a second operating condition; In the first operating condition, the rollers of the first switch assembly and the rollers of the second switch assembly abut against the protruding portions of the two sets of cams, so as to switch the first switch assembly and the second switch assembly to the open state by pressing the elastic contact. In the second operating condition, the rollers of the first switch assembly and the second switch assembly are separated from the protrusions of the two sets of cams, so as to switch the first switch assembly and the second switch assembly to the closed state by releasing the elastic contacts.

5. The bypass switch monitoring device according to claim 1, characterized in that, The first switch assembly is fixedly connected to the housing via a first mounting structure; The first mounting structure includes a limiting cap, a first screw, a first pressure plate, and a first tightening member; the limiting cap is connected to the end of the first screw, the first screw passes through the side wall of the housing, the first switch assembly, and the first pressure plate in sequence, the first switch assembly is located between the side wall of the housing and the first pressure plate, and the first tightening member is screwed onto the first screw to press the first switch assembly against the housing through the first pressure plate.

6. The bypass switch monitoring device according to claim 5, characterized in that, The side wall of the housing has an elongated hole extending along the length of the housing, and the first screw passes through the elongated hole along the width of the housing.

7. The bypass switch monitoring device according to claim 1, characterized in that, The second switch assembly is fixedly connected to the housing via a second mounting structure; The second mounting structure includes a second screw, a second pressure plate, and a second tightening member. The end of the second screw is fixedly connected to the side wall of the housing and passes through the second switch assembly and the second pressure plate in sequence. The second switch assembly is located between the side wall of the housing and the second pressure plate. The second tightening member is screwed onto the second screw to press the second switch assembly against the housing through the second pressure plate.

8. The bypass switch monitoring device according to claim 7, characterized in that, The second mounting structure also includes a cover. The cover is placed over the second switch assembly, the second screw passes through the cover, and the cover is locked by the second tightening member.

9. The bypass switch monitoring device according to claim 8, characterized in that, The cover is made of a transparent material.

10. The bypass switch monitoring device according to claim 1, characterized in that, It also includes the cover; The cover is connected to the housing and together form a receiving cavity, and the first switch assembly and the corresponding cam are located inside the receiving cavity.

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