Safety switch and switch machine with same

Abstract

The present application relates to the field of rail transit signal equipment, and particularly to a safety switch (100) and a switch machine with the same. The safety switch (100) comprises a rack (2), a driving plate (3) and at least one travel switch (4). The function of the safety switch (100) is realized by the swing of the driving plate (3) relative to the rack (2) and the cooperation between the driving plate (3) and the travel switch (4) and the baffle (13). When the driving plate (3) swings to the cut-off position under the operation of external force, the driving plate (3) can just touch the travel switch (4) arranged on the rack (2) and make the contact of the travel switch (4) disconnected to cut off the power supply of the motor (11) of the switch machine, and the baffle (13) is moved away from the rocking handle operation end of the speed reducer (12) so that the rocking handle can be used to operate the switch machine outside the switch machine. In this way, the maintenance operation of the switch machine is more convenient.

Description

Technical Field

[0001] This invention relates to the field of rail transit signaling equipment, and in particular to safety switches and switch machines having the same. Background Technology

[0002] Electric switch machines are key basic signaling equipment in rail transit. Their function is to switch and lock the switch rails / point rails, change the opening direction of the turnout, and reflect the position status of the switch rails / point rails through contacts. Switch machines generally have a manual safety switch. When the switch machine needs maintenance, maintenance personnel use a special key to operate the safety switch to disconnect the power supply to the control circuit and remove the baffle at the crank operating end of the gear reducer, allowing operation of the switch machine via the crank handle. The reliability and ease of operation of the safety switch are key technical aspects. Summary of the Invention

[0003] The present invention aims to provide a new type of safety switch with better working performance and a switch machine having the same.

[0004] In a first aspect, the present invention provides a novel safety switch, primarily used in a switch machine, the switch machine including a motor and a reducer driven by the motor, and the crank handle of the reducer also having an operable baffle. The safety switch includes a frame, a drive plate, and at least one limit switch. The frame includes two opposing support plates and a top plate connected to the top ends of the two support plates; the drive plate is rotatably disposed between the two support plates via a first rotating shaft, and its rotation drives the baffle to change position; at least one limit switch controls the power supply to the motor, the limit switch being connected to the top plate with its contact end facing the drive plate. The drive plate is further configured such that when it swings around the first rotating shaft to a cut-off position under external force, it triggers the contacts of the limit switch to open, causing the baffle to also move away from the crank handle of the reducer.

[0005] As can be seen from the above scheme, the function of the safety switch of the present invention relies on the swing of the drive plate relative to the frame and the interaction between the drive plate, the limit switch, and the baffle. When the drive plate swings to the cut-off position under external force, it can just trigger the limit switch mounted on the frame, causing its contacts to open, and the drive baffle moves away from the crank operating end of the reducer. Thus, as the drive plate swings, the limit switch can change between on and off states, and the baffle can change position to either block the crank operating end of the reducer or move away from the crank operating end of the reducer. This safety switch makes the maintenance and operation of the switch machine more convenient.

[0006] Secondly, the present invention provides a novel switch machine comprising the safety switch described in the first aspect, a motor, a reducer, a baffle, and a connecting rod. The reducer is driven by the motor and has a crank operating end. The baffle is configured to be driven by a drive plate of the safety switch, such that the baffle can vary between a position that obstructs the crank operating end and a position that moves away from the crank operating end.

[0007] As can be seen from the above scheme, when the switch machine is working normally, the motor rotates, driving the switch machine's operating lever. When the switch machine is under maintenance, the safety switch is activated by operating the key externally. The safety switch's drive plate is then moved to the off position to disconnect the motor's power supply and remove the baffle from the reducer's crank operating end. At this time, the reducer can be operated by cranking the lever to move the switch machine's operating lever, thus switching the switch machine's various states to complete the maintenance. Attached Figure Description

[0008] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which will make the above and other features and advantages of the present invention more apparent to those skilled in the art. In the drawings:

[0009] Figure 1 This is a schematic diagram of the switch machine in one embodiment of the present invention.

[0010] Figure 2 for Figure 1 A partial exploded view of the safety switch in a switch machine.

[0011] Figure 3 for Figure 2 A partial exploded view of the power transmission structure in a safety switch.

[0012] Figure 4 for Figure 2 A partial exploded view of the power conversion structure in the safety switch.

[0013] The reference numerals in the attached figures are as follows:

[0014] 100 - Safety switch;

[0015] 1-Box body; 101-Keyhole;

[0016] 11-Motor; 12-Reducer; 121-First gear; 122-Second gear; 123-Third gear; 124-Mounting plate; 13-Baffle; 14-Connecting rod;

[0017] 2-Frame; 21-Support plate; 22-Top plate;

[0018] 3-Drive board; 31-First rotating shaft; 32-Limit frame; 33-Limit plate; 34-Hinge frame;

[0019] 4-Limit switch; 41-Terminal;

[0020] 51-Cam; 511-Pin;

[0021] 52-Drive shaft; 521-Guide sleeve; 522-Bracket; 523-Insertion rod;

[0022] 61 - Second pivot;

[0023] 62-Switchboard; 621-Connecting lug;

[0024] 63-Buffer frame; 631-Limit hook;

[0025] 64 - Elastic element;

[0026] 65-Connecting post;

[0027] 66-Roller;

[0028] 71-Insulating board; 72-Transparent protective cover; 721-Post. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the following embodiments are provided to further illustrate the present invention in detail.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0031] like Figure 1 A schematic diagram of one embodiment of the switch machine of the present invention is shown. It should be noted that... Figure 1 Only the main structures relevant to this invention are shown; other common structures in switch machines, such as actuating levers, indicator levers, and clutches, are not shown. Figure 1 As can be seen, the switch machine includes a housing 1, and within the housing 1 are a safety switch 100, a motor 11, and a reducer 12. The reducer 12 is driven by the motor 11, and the reducer 12 is equipped with a crank operating end, which corresponds to the third gear 123. When the switch machine is operating normally, the motor 11 rotates to drive the lead screw of the switch machine through the reducer 12, thereby driving the actuating rod.

[0032] Continue to refer to Figure 1 The crank operation end of the reducer 12 is also equipped with a baffle 13, which can be driven by the safety switch 100 to switch between a position that covers the crank operation end and a position that is removed from the crank operation end. The housing 1 is also equipped with a keyhole 101. When the switch machine is under maintenance, a special key can be used to operate the safety switch 100 from outside the switch machine. When the safety switch 100 is in the off state, it simultaneously drives the baffle 13 to move away from the crank operation end of the reducer 12. At this time, the reducer 12 can be operated by cranking the handle to move the switch machine's operating lever and switch between various states of the switch machine to complete the maintenance.

[0033] In one alternative implementation, refer to Figure 1 The reducer 12 includes a mounting plate 124, a first gear 121, a second gear 122, and a third gear 123. The mounting plate 124 is located at the front end of the motor 11, with the output shaft of the motor 11 extending out of the mounting plate 124. The first gear 121 is connected to the output shaft of the motor 11. The second gear 122 and the third gear 123 are both rotatably connected to the mounting plate 124 and can mesh with the first gear 121. The second gear 122 can be connected to a lead screw, which drives the switch machine's operating lever by rotating the lead screw. One end of a baffle 13 is coaxially and rotatably connected to the second gear 122, and the other end can cover the outer end of the shaft of the third gear 123. A connecting rod 14 is hinged to the baffle 13, and the other end of the connecting rod 14 is hinged to a safety switch 100. When the safety switch 100 is in the off state, the connecting rod 14 can drive the baffle 13 to move away from the crank operation end of the reducer 12.

[0034] When the safety switch 100 is in the off state, it can also disconnect the power supply to the motor 11, allowing maintenance personnel to perform maintenance operations. The main functions of the safety switch 100 have been explained above; the structure of the safety switch 100 will now be described in detail.

[0035] As shown in Figure 1, the safety switch 100 includes a frame 2 and a drive board 3. For a detailed structural example of the drive board 3, please refer to [link to Figure 1]. Figure 3 The hinge frame 34 of the drive plate 3 extends from one end of the drive plate 3 and can be connected to a hinge shaft to hinge the connecting rod 14 thereon. The hinge frame 34 of the drive plate 3 is hinged to one end of the connecting rod 14, that is, the drive plate 3 can drive the baffle 13 to change position through the connecting rod 14.

[0036] Continue to refer to Figure 2The frame 2 includes two opposing support plates 21 and a top plate 22 connected to the top of the two support plates 21. At least one limit switch 4 is provided on the top plate 22. Figure 2 Four limit switches 4 are shown. One limit switch 4 is used to control the power supply to the motor 11, and is connected to the top plate 22 with its contact end facing the drive plate 3. For example, in addition to the limit switch 4 used to control the power supply to the motor 11, the other limit switches 4 can also control other circuits of the switch machine. The drive plate 3 is rotatably mounted between the two support plates 21 via a first rotating shaft 31, and its rotation can drive the baffle 13 to change position. Furthermore, the drive plate 3 is also configured to trigger the contacts of the limit switch 4 to open and cause the baffle 13 to also move away from the crank operating end of the reducer 12 when it swings to the cut-off position around the first rotating shaft 31 under external force.

[0037] As can be seen from the above scheme, the function of the safety switch 100 of the present invention relies on the swing of the drive plate 3 relative to the frame 2 and the cooperation between the drive plate 3, the limit switch 4, and the baffle 13. When the drive plate 3 swings to the cut-off position under external force, the drive plate 3 can trigger the limit switch 4 provided on the frame 2 to disconnect its contacts, and the drive baffle 13 can be moved away from the crank operation end of the reducer 12. This safety switch 100 makes the maintenance operation of the switch machine more convenient.

[0038] For example, such as Figure 2 Each limit switch 4 shown has at least one pair of terminals 41, allowing one limit switch 4 to control the on / off state of one phase of the power supply to the motor 11. Screws can be inserted from the underside to the top side of the top plate 22 of the frame 2, connecting the limit switch 4 to the top plate 22. Thus, compared to a solution where the connector is used to connect the limit switch 4 to the frame 2 and also functions as a terminal 41, this embodiment avoids the problem of wiring resistance being affected by the environment, resulting in a more stable resistance value.

[0039] In a preferred embodiment, continue to refer to Figure 2 The safety switch 100 also includes at least one insulating plate 71. Multiple limit switches 4 are arranged side-by-side, with the insulating plate 71 positioned between adjacent limit switches 4 and connected to the side walls of the adjacent limit switches 4. This ensures that the resistance between the multiple safety switches 100 does not affect each other, further making the performance of the safety switch 100 more stable and reliable. For example, at least one protrusion can be provided on each side of the insulating plate 71, and the protrusion can be inserted into the side wall of the corresponding limit switch 4 to achieve the connection between the insulating plate 71 and the limit switch 4.

[0040] In a preferred embodiment, continue to refer to Figure 2The safety switch 100 also includes a transparent protective cover 72, which is mounted on the top plate 22 of the frame 2 via two uprights 721, and the transparent protective cover 72 encloses the limit switch 4 inside it; the surfaces of the two uprights 721 are provided with an insulating layer. The transparent protective cover 72 is also an insulating cover. In this way, since the limit switches 4 are all located on the upper side of the top plate 22 of the frame 2, the wiring of the limit switches 4 can be clearly seen through the transparent protective cover 72, which facilitates daily maintenance and allows for quick troubleshooting or replacement in case of faults.

[0041] Combination Figure 3 The safety switch 100 also includes a drive shaft 52 and a cam 51, the first end of which can be driven by an external force. For example, see reference... Figure 1 The first end of the drive shaft 52 inside the housing 1 extends to the keyhole 101, allowing it to be operated by a special key from outside the switch machine. The second end of the drive shaft 52 extends along the drive plate 3 to its lower part. A cam 51 is coaxially mounted at the second end of the drive shaft 52 and supported on the drive plate 3. When the drive shaft 52 is driven by an external force, the cam 51 rotates, causing the drive plate 3 to swing around the first rotating shaft 31. It should be noted that the cam 51 typically does not need to rotate a full revolution during use. The cam 51 can be a complete cam structure or it can have only one large-diameter end, with the end facing away from this large-diameter end not required.

[0042] For example, when the drive shaft 52 drives the cam 51 to rotate, the distance between the drive plate 3 supported above the cam 51 and the drive shaft 52 also changes. Thus, when the drive plate 3 swings to the cut-off position, the distance between the drive plate 3 and the drive shaft 52 increases to a certain extent. At this cut-off position, the drive plate 3 can activate the limit switch 4 mounted on the frame 2, causing its contacts to open, and the drive baffle 13 to move away from the crank operation end of the reducer 12. It should be noted that although the safety switch 100 in this embodiment is described using the drive plate 3 driven by the cam 51 as an example, it is only a relatively simple driving method selected in this embodiment. However, the driving structure and driving method that can cause the drive plate 3 to swing are not limited to this. For example, a crank-rocker mechanism, a crank-slider mechanism, etc., can also be used to cause the drive plate 3 to swing.

[0043] Continue to refer to Figure 3The drive plate 3 is also bent to form a limiting plate 33 extending away from the top plate 22. Furthermore, the safety switch 100 includes at least one pin 511 connected to the large-diameter end of the cam 51 and parallel to the drive shaft 52. When the cam 51 rotates, the pin 511 can support the limiting plate 33, causing the drive plate 3 to swing about the first pivot 31. For example, only one pin 511 can be provided at one large-diameter end of the cam 51, or one pin 511 can be provided at each of the two large-diameter ends of the cam 51. Either the cam 51 or the pin 511 can cause the drive plate 3 to swing, making the driving function of the drive plate 3 more reliable.

[0044] Preferably, continue to refer to Figure 3 The drive plate 3 is also bent to form a limiting frame 32 that extends away from the top plate 22. One end of the pin 511 can be inserted into the limiting frame 32 to limit the rotation range of the pin 511. For example, the limiting frame 32 can be square or elliptical, etc., set according to the movement trajectory of the pin 511, with the square and elliptical shapes tangent to each other. This further improves the reliability of the drive plate 3's swing.

[0045] In the preferred embodiment of this example, refer to... Figure 3 The safety switch 100 also includes a guide sleeve 521, a bracket 522, and a plug rod 523. The guide sleeve 521 is coaxially mounted on the drive shaft 52. The outer end of the guide sleeve 521 can be bolted to the inner wall of the switch machine housing 1. A bearing can be installed on the switch machine housing 1, and the first end of the drive shaft 52 passes through the guide sleeve 521 and is supported and coaxially mounted on the bearing. A first through hole is provided on the side wall of the guide sleeve 521. The bracket 522 is mounted on the guide sleeve 521 and has a second through hole directly opposite the first through hole. One end of the plug rod 523 passes through the second through hole and the first through hole and extends into the interior of the guide sleeve 521. A third through hole is provided on the drive shaft 52, and the plug rod 523 can be inserted into the third through hole when the drive plate 3 rotates to the cut-off position. Thus, when the drive plate 3 swings around the first rotating shaft 31 to the cutting position, the transmission shaft 52 can no longer continue to rotate. On the one hand, this helps the drive plate 3 to swing accurately to the cutting position, and on the other hand, it allows the drive plate 3 to be stably maintained at the cutting position, making it convenient for maintenance personnel to maintain the switch machine.

[0046] Preferably, the safety switch 100 further includes a retaining ring and a compression spring. The retaining ring can be coaxially mounted on the insertion rod 523, and the compression spring is disposed between the bracket 522 and the retaining ring, and is configured to apply a thrust toward the drive shaft 523 to the insertion rod 523. In this way, the insertion rod 523 can be inserted more smoothly and reliably into the third through hole of the drive shaft 52, thereby limiting the continued rotation of the drive shaft 52.

[0047] Reference Figure 4 In a preferred embodiment, the safety switch 100 further includes at least one return spring disposed between the drive plate 3 and the top plate 22. Exemplarily, when the cam rotates from its small diameter portion to a position where its large diameter portion contacts the drive plate 3, the supporting force provided by the cam 51 directly enables the drive plate 3 to swing. When the cam 51 rotates from its large diameter portion to a position where its small diameter portion contacts the drive plate 3, the return spring's elastic force allows the drive plate 3 to return to its original position. During the swinging motion of the drive plate 3 around the first rotating shaft 31, one end of the drive plate 3 approaches the top plate 22 of the frame 2 while the other end moves away from the top plate 22. Based on the swinging pattern of the drive plate 3, the return spring can be disposed at one or both ends of the frame 2 that are offset from the first rotating shaft 31. A tension spring or a compression spring can be selected as needed, and two or more return springs can be disposed at the same end of the frame 2. For example, connecting posts 65 can be disposed on the top plate 22 of the frame 2 and the drive frame, and the two ends of the return spring can be connected to the connecting posts 65 located at both ends.

[0048] In a preferred embodiment, continue to refer to Figure 4 The safety switch 100 also includes a second rotating shaft 61, a switch plate 62, a buffer frame 63, and an elastic element 64. The elastic element 64 can be a spring or other elastic compressible element. The second rotating shaft 61 is disposed between two support plates 21 and is closer to the top plate 22 of the frame 2 than the first rotating shaft 31. The switch plate 62 is rotatably mounted on the second rotating shaft 61 via connecting ears 621 on both sides, with its top surface facing the limit switch 4. The buffer frame 63 is located inside the switch plate 62, with one end rotatably mounted on the second rotating shaft 61, and its lower end, away from the second rotating shaft 61, supported on the top surface of the drive plate 3. At least one limiting hook 631 is formed on the upper side of the end of the buffer frame 63 away from the second rotating shaft 61, allowing one end of the switch plate 62 to extend into it, and a movable gap is formed between the inner wall of the limiting hook 631 and the switch plate 62. The elastic element 64 is disposed between the buffer frame 63 and the opposite surfaces of the switch plate 62. When the drive plate 3 swings to the cut-off position, the elastic element 64 causes the switch plate 62 to swing to touch the contact end of the limit switch 4, thereby causing the contacts of the limit switch 4 to open.

[0049] For example, during the process of the drive plate 3 swinging from its original position to the cut-off position, the drive plate 3 rotates around the first rotating shaft 31, and the buffer frame 63 rotates around the second rotating shaft 61 under the support of the drive plate 3. The end of the switch plate 62 and the buffer frame 63 away from the second rotating shaft 61 gradually approaches the top plate 22 of the frame 2. When the switch plate 62 hits the contact end of the limit switch 4, the contact of the limit switch 4 is disconnected. The elastic force of the elastic element 64 is greater than the sum of the rebound forces of the contacts of each limit switch 4, so that all limit switches 4 can be activated during normal use. Furthermore, after the contact of the limit switch 4 reaches the disconnected position, the excess travel of the drive plate 3 caused by abnormal operation or processing error can be consumed by the movement gap formed between the relative inner wall of the limit hook 631 and the switch plate 62, effectively protecting the safety switch contacts. Thus, as the drive plate 3 swings to cause the contacts of the limit switch 4 to open, the limit switch 4 is opened by relying on the elastic force of the elastic element 64. Since the elastic force is variable, damage to the limit switch 4 can be avoided, the failure rate of the switch machine can be reduced, and the reliability of the switch machine can be improved.

[0050] Preferably, continue to refer to Figure 4 The safety switch 100 may also include a roller 66, which is rotatably mounted at the bottom end of the buffer frame 63 and rolls in engagement with the upper surface of the drive plate 3. This reduces the rigid contact or frictional resistance between the buffer frame 63 and the drive plate 3, making it easier to operate the safety switch 100 with a special key and reducing wear on related components of the safety switch 100.

[0051] This invention relates to the field of rail transit signaling equipment, particularly to a safety switch 100 and a switch machine having the same. The safety switch 100 includes a frame 2, a drive plate 3, and at least one limit switch 4. The function of the safety switch 100 depends on the swinging of the drive plate 3 relative to the frame 2 and the interaction between the drive plate 3, the limit switch 4, and the baffle 13. When the drive plate 3 swings to the cut-off position under external force, it triggers the limit switch 4 mounted on the frame 2, causing its contacts to open and de-energizing the switch machine's motor 11. Simultaneously, the drive baffle 13 is removed from the crank operation end of the reducer 12, allowing the switch machine to be operated externally using a crank. This makes the maintenance and operation of the switch machine more convenient.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. The nouns and pronouns referring to persons in this patent application are not limited to specific genders.

Claims

1. A safety switch (100) for use in a switch machine, the switch machine comprising a motor (11) and a reducer (12) driven by the motor (11), wherein the crank operation end of the reducer (12) is further provided with an operable baffle (13), characterized in that, include: A frame (2) includes two opposing support plates (21) and a top plate (22) connected to the top of the two support plates (21). A drive plate (3) is rotatably disposed between the two support plates (21) via a first rotating shaft (31), and its rotation can drive the baffle (13) to change position. At least one limit switch (4) is provided for controlling the power supply to the motor (11), the limit switch (4) is connected to the top plate (22) and its contact end faces the drive plate (3). The drive plate (3) is also configured to trigger the contact of the limit switch (4) to open when it swings around the first rotating shaft (31) to the cut-off position under external force operation, and to make the baffle (13) also move away from the crank operation end of the reducer (12). The second pivot (61) is disposed between the two support plates (21) and is closer to the top plate (22) than the first pivot (31). A switch plate (62) is rotatably mounted on the second rotating shaft (61) via connecting lugs (621) on both sides, with its top surface facing the limit switch (4). A buffer frame (63) is located inside the switch plate (62), and one end of the buffer frame (63) is rotatably mounted on the second rotating shaft (61), and the lower side of the end of the buffer frame (63) away from the second rotating shaft (61) is supported on the top surface of the drive plate (3); at least one limiting hook (631) is formed on the upper side of the end of the buffer frame (63) away from the second rotating shaft (61), the limiting hook (631) allows one end of the switch plate (62) to extend into it, and an movable gap is formed between the relative inner wall of the limiting hook (631) and the switch plate (62); An elastic element (64) is disposed between the opposing surfaces of the buffer frame (63) and the switch plate (62); wherein, when the drive plate (3) swings to the cut-off position, the elastic element (64) causes the switch plate (62) to swing to touch the contact end of the limit switch (4), thereby causing the contact of the limit switch (4) to open.

2. The safety switch (100) according to claim 1, characterized in that, Also includes: A roller (66) is rotatably disposed at the bottom end of the buffer frame (63) and rolls in engagement with the upper surface of the drive plate (3).

3. The safety switch (100) according to claim 1, characterized in that, Also includes: A drive shaft (52) has a first end that can be driven by an external force and a second end that extends along the drive plate (3) to the underside of the drive plate (3); A cam (51) is coaxially disposed at the second end of the drive shaft (52) and supported thereon on the drive plate (3). When the drive shaft (52) is driven by an external force, the cam (51) rotates and drives the drive plate (3) to swing.

4. The safety switch (100) according to claim 3, characterized in that, The drive plate (3) is also bent to form a limiting plate (33) that extends away from the top plate (22); The safety switch (100) also includes: At least one pin (511) is connected to the large-diameter end of the cam (51) and parallel to the drive shaft (52), and the pin (511) can be supported by the limiting plate (33) to allow the drive plate (3) to swing about the first rotating shaft (31) when the cam (51) rotates.

5. The safety switch (100) according to claim 4, characterized in that, The drive plate (3) is also bent to form a limiting frame (32) that extends away from the top plate (22). One end of the pin (511) can be inserted into the limiting frame (32) to limit the rotation range of the pin (511).

6. The safety switch (100) according to claim 3, characterized in that, Also includes: A guide sleeve (521) is coaxially sleeved on the drive shaft (52), and a first passage is provided on its side wall. hole; A bracket (522) is disposed on the guide sleeve (521) and has a second through hole facing the first through hole; A plug (523) has one end passing through the second through hole and the first through hole and extending into the interior of the guide sleeve (521); Furthermore, a third through hole is provided on the drive shaft (52), and the insertion rod (523) can be inserted into the third through hole when the drive plate (3) rotates to the cut-off position.

7. The safety switch (100) according to claim 6, characterized in that, Also includes: A retaining ring is coaxially disposed on the insert (523); A compression spring is disposed between the bracket (522) and the retaining ring and is configured to apply a thrust toward the drive shaft (523) to the insert (523).

8. The safety switch (100) according to claim 1, characterized in that, The safety switch (100) also includes at least one reset spring disposed between the drive plate (3) and the top plate (22).

9. A switch machine, characterized in that, include: The safety switch (100) according to any one of claims 1 to 8; One motor (11); A speed reducer (12) driven by the motor (11) and provided with a crank handle operation end; A baffle (13) is configured to be driven by the drive plate (3) of the safety switch (100) such that the baffle (13) can vary between a position that covers the crank operating end and a position that is removed from the crank operating end.

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