Mechanical safety device

Abstract

The invention relates to a mechanical safety device which comprises a shell and a top cover plate detachably connected with the top of the shell, a plug pin mechanism, a transmission mechanism and a microswitch are arranged in the shell, a security plug pin is arranged in the plug pin mechanism, an execution rod is arranged in the transmission mechanism, a first abutting face is arranged in the middle of the execution rod, and a second abutting face is arranged in the middle of the execution rod. A switch contact is arranged on the microswitch, the security bolt is transversely inserted into the shell, the end face of the execution rod is laterally pressed, and after transmission of the execution rod, the first pressing face on the execution rod is driven to be close to the microswitch, so that the switch contact on the microswitch is pressed, and the microswitch is triggered to act. In conclusion, accidents such as system damage caused by misoperation during ground maintenance can be avoided, the situation that the micro switch is separated from the security plug pin hole in the shell due to the gravity effect after being inserted is prevented, and the micro switch has the advantages of being good in operability and good in man-machine interaction.

Description

Technical Field

[0001] This patent relates to the field of aircraft ground maintenance technology, and in particular to a mechanical safety insurance device. Background Art

[0002] Aircraft need regular ground maintenance. During the ground maintenance process, the main power signal of the control system under maintenance needs to be disconnected to prevent safety accidents such as product damage caused by misoperation during the maintenance process. In order to achieve high working reliability and human-machine interactivity, the safety insurance device must be mechanical and have a working status indication function, which makes most electronic safety insurance devices unusable. At the same time, the safety insurance device also needs to have a self-locking function to avoid accidents caused by state changes caused by the action of the internal mechanism due to gravity. The existing mechanical safety insurance devices have the problems of complex structure, low reliability, poor human-machine interactivity and no self-locking function. Therefore, a mechanical safety insurance device is urgently needed to solve the above problems. Summary of the invention

[0003] The invention provides a mechanical safety device to solve the technical problems of the existing mechanical safety device, such as complex structure, low reliability, poor human-machine interaction and lack of self-locking function.

[0004] In order to achieve the above technical objectives, the specific technical solutions adopted by the present invention are:

[0005] A mechanical safety insurance device comprises a shell and a top cover plate detachably connected to the top of the shell, a latch mechanism, a transmission mechanism and a micro switch are arranged inside the shell, a security latch is arranged inside the latch mechanism, an actuator rod is arranged inside the transmission mechanism, a first pressing surface is arranged at the middle position of the actuator rod, a switch contact is arranged on the micro switch, the security latch is laterally inserted into the shell, and the end surface of the actuator rod is laterally pressed. After being transmitted by the actuator rod, the first pressing surface on the actuator rod is driven to approach the micro switch, thereby pressing the switch contact on the micro switch, triggering the micro switch action, and changing the normally closed on or off state of the micro switch.

[0006] Furthermore, the security latch includes an operating rod, a limiting inner cylinder, a limiting ball, a latch limiting spring and an end sleeve, and the operating rod passes through the interior of the limiting inner cylinder and is slidably connected to the interior of the limiting inner cylinder.

[0007] Furthermore, the inner end of the limiting inner cylinder is provided with two symmetrically arranged cylindrical through holes, and there are two limiting balls, which are respectively located inside the corresponding cylindrical through holes. The inner end of the limiting inner cylinder is also provided with two step grooves, which are arranged at a position farther away from the inner end surface of the limiting inner cylinder than the cylindrical through hole, and the area of ​​the step groove is larger than the cross-section of the limiting ball, thereby facilitating the corresponding limiting ball to enter the step groove when the step groove follows the operating rod to move to the position of the cylindrical through hole.

[0008] Furthermore, a long latch hole is provided inside the shell, and the security latch is laterally inserted into the interior of the long latch hole and is slidably connected to the interior of the long latch hole. An annular groove is provided inside the long latch hole. In the process of the security latch penetrating into the long latch hole, it can drive the cylindrical through hole inside it to move to the annular groove, thereby facilitating the two limiting balls to enter the annular groove along the corresponding cylindrical through holes.

[0009] Furthermore, an end sleeve is sleeved on the outer end of the limiting inner cylinder, and the inner side wall of the end sleeve is assembled with the threaded part arranged on the outer ring of the outer end of the limiting inner cylinder through an internal thread, and a reset cavity is arranged inside the end sleeve, one end of the reset cavity penetrates into the interior of the limiting inner cylinder, and a reset pressure surface is arranged on the inner side wall of the reset cavity close to one end of the limiting inner cylinder, the operating rod passes through the interior of the reset cavity and penetrates into the interior of the limiting inner cylinder through the reset pressure surface, the latch limiting spring is sleeved on the operating rod located inside the reset cavity, and a reset pressure plate located in the reset cavity is fixedly sleeved on the operating rod, one end of the latch limiting spring presses on the reset pressure plate, and the other end of the latch limiting spring presses on the reset pressure surface, and the operating rod is driven to perform reverse reset under the reverse force through the reset pressure plate and the reset pressure surface against the latch limiting spring.

[0010] Furthermore, the actuator rod is provided with a spherical end, a stepped groove, a connecting long plate, a reset circular plate and a U-shaped plug plate. The spherical end is arranged at one end of the actuator rod close to the long hole of the latch, the connecting long plate and the reset circular plate are sleeved in the middle position of the actuator rod and fixedly connected to the actuator rod, the stepped groove is arranged between the spherical end and the connecting long plate, and the U-shaped plug plate is arranged at one end of the actuator rod away from the long hole of the latch.

[0011] Furthermore, a long transmission hole is provided inside the shell body and passes vertically through the long hole of the latch pin. The spherical end passes through the long transmission hole and extends deep into the long hole of the latch pin. A U-shaped connecting groove is provided inside the shell body and is located at one end of the actuator rod close to the U-shaped connecting groove. The U-shaped plug plate is inserted into the U-shaped connecting groove. A transmission reset spring is provided between the reset circular plate and the end of the U-shaped connecting groove. The transmission reset spring is sleeved on the actuator rod. The low pressure on the transmission reset spring is applied through the reset circular plate and the end of the U-shaped connecting groove, thereby driving the actuator rod to reset to a position close to the long hole of the latch pin.

[0012] Furthermore, the connecting long plate and the reset circular plate are both arranged perpendicular to the actuator rod, the connecting long plate is arranged parallel to the operating interface position of the micro switch, and the switch contacts are arranged on the end surface of the micro switch close to the connecting long plate, so that the connecting long plate can be close to the micro switch in the process of following the movement of the actuator rod, and low pressure is applied to the switch contacts through the connecting long plate, and the micro switch is installed inside the object by fixing screws.

[0013] Furthermore, a sealing ring sleeved on the actuator rod is provided in the stepped groove, the sealing ring is located inside the long transmission hole, and a U-shaped limit plate extending deep into the shell is provided on the top cover plate, the U-shaped limit plate is arranged perpendicular to the actuator rod, and the U-shaped limit plate extends into the U-shaped connecting groove, and the end of the U-shaped limit plate is close to the U-shaped plug plate, and there is a gap with the U-shaped plug plate, so that the actuator rod can translate in the U-shaped connecting groove and cannot rotate, and a rubber gasket is provided between the top cover plate and the opening provided at the top of the shell, and the top cover plate is connected to the top of the shell by connecting screws passing through its four corners.

[0014] Furthermore, an indicator light is provided on the front side panel of the shell, and the indicator light is located on the side of the front side panel away from the long hole of the pin. The indicator light and the micro switch are connected to the external components through a wiring harness passing through the outer side wall of the object, and the indicator light and the micro switch are also connected through a wiring harness.

[0015] The present invention is mainly used to control the on and off of the total power signal of a certain control system of an aircraft. On the ground, the ground staff manually inserts the security plug, triggering the micro switch inside the safety insurance device to disconnect. At this time, the total power signal of the system is disconnected, and ground maintenance and other work can be carried out. Any operation will not trigger the control system to work, which can avoid safety accidents caused by misoperation; before the aircraft takes off, the ground staff unplugs the security plug, and the micro switch inside the safety insurance device is turned on. At this time, the total power signal of the system is output normally, and the control system works normally.

[0016] By adopting the above technical solution, the present invention can also bring the following beneficial effects:

[0017] 1. The present invention provides a mechanical safety insurance device, which controls the disconnection of the main power signal of the aircraft avionics system by inserting a security plug to cause the internal micro switch to operate, so as to avoid accidents such as system damage caused by misoperation during ground maintenance, and has high working reliability. At the same time, the security plug has a self-locking function, which can prevent it from falling out of the security plug hole on the shell due to gravity after insertion, and no auxiliary work is required during use, and the operation is convenient. After the security plug is inserted, the indicator light on the panel lights up, which can directly indicate the on-off state of the main power signal of the aircraft avionics system, and the human-computer interaction is good, thereby reducing the response time and improving the response efficiency.

[0018] 2. The present invention mentions a mechanical safety insurance device, which can use rubber gaskets and sealing rings, and silicone rubber is coated inside the wiring harness outlet position to seal the internal circuit in the cavity, which has a water vapor-proof function and good environmental adaptability of the internal circuit. At the same time, the top cover plate and the micro switch are both detachably connected, which is very convenient for inspection and maintenance, and also reduces the cost of maintenance, which is very suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a mechanical safety insurance device mentioned in the present invention;

[0021] Figure 2 Schematic diagram of the connection structure between the security latch and the housing in this example;

[0022] Figure 3 It is the circuit schematic diagram of the safety fuse device in this example;

[0023] Figure 4 is a schematic diagram of the connection structure between the housing and the long hole of the latch in this example;

[0024] Figure 5 is a schematic diagram of the connection structure between the execution rod and the connecting long plate in this example;

[0025] Figure 6 is a schematic diagram of the connection structure between the top cover plate and the U-shaped limiting plate in this example;

[0026] Figure 7 This is the exploded view of the security latch in this example;

[0027] Figure 8 is a schematic diagram of the structure of the security latch in this example;

[0028] Fig. 9 This is a schematic diagram of the working state of the safety device in this example when the safety pin is not inserted;

[0029] Fig.10 This is a schematic diagram of the working state of the safety device in this example during the process of inserting the security bolt;

[0030] Fig.11 is a schematic diagram of the working state of the safety device in this example when it is fully inserted into the security latch;

[0031] 1. Top cover plate; 2. Shell; 3. Security latch; 4. Indicator light; 5. Rubber gasket; 6. Wiring harness; 7. Connecting screw; 8. Fixing screw; 9. Micro switch; 10. Actuator rod; 11. Transfer reset spring; 12. Sealing ring; 13. Transfer long hole; 14. Latch long hole; 15. U-shaped connecting groove; 16. Step groove; 17. Connecting long plate; 18. Reset circular plate; 19. U-shaped plug plate; 20. Spherical end; 21. U-shaped limit plate; 22. Operating rod; 23. Limit inner cylinder; 24. Limit sphere; 25. Latch limit spring; 26. End sleeve; 27. Annular groove; 28. Step groove; 29. ​​Threaded portion; 30. Reset pressure plate; 31. Reset pressure surface. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0034] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present invention, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0035] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0036] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described may be practiced without these specific details.

[0037] Example 1

[0038] In one embodiment of the present invention, see Figures 1 to 11 The present invention mentions a mechanical safety insurance device, including a shell 2 and a top cover plate 1 detachably connected to the top of the shell 2, a latch mechanism, a transmission mechanism and a micro switch 9 are arranged inside the shell 2, a security latch 3 is arranged inside the latch mechanism, an actuator rod 10 is arranged inside the transmission mechanism, a first pressing surface is arranged at the middle position of the actuator rod 10, and a switch contact is arranged on the micro switch 9. The security latch 3 is laterally inserted into the shell 2, and the end surface of the actuator rod 10 is laterally pressed. After being transmitted by the actuator rod 10, the first pressing surface on the actuator rod 10 is driven to approach the micro switch 9, thereby pressing the switch contact on the micro switch 9, triggering the action of the micro switch 9, and changing the normally closed on or off state of the micro switch 9.

[0039] The security latch 3 includes an operating rod 22, a limiting inner cylinder 23, a limiting ball 24, a latch limiting spring 25 and an end sleeve 26. The operating rod 22 passes through the interior of the limiting inner cylinder 23 and is slidably connected to the interior of the limiting inner cylinder 23. The inner end of the limiting inner cylinder 23 is provided with two symmetrically arranged cylindrical through holes, and there are two limiting balls 24, which are respectively located inside the corresponding cylindrical through holes. The inner end of the limiting inner cylinder 23 is also provided with two stepped grooves 28, which are arranged at a position farther from the inner end face of the limiting inner cylinder 23 than the cylindrical through hole, and the area of ​​the stepped groove 28 is larger than the cross section of the limiting ball 24, so that the corresponding limiting ball 24 can enter the stepped groove 28 when the stepped groove 28 moves to the cylindrical through hole position following the operating rod 22. A long latch hole 14 is provided inside the shell 2, and the security latch 3 is horizontally inserted into the interior of the long latch hole 14 and is slidably connected with the interior of the long latch hole 14. An annular groove 27 is provided inside the long latch hole 14. When the security latch 3 penetrates into the long latch hole 14, it can drive the cylindrical through hole inside it to move to the annular groove 27, thereby facilitating the two limiting balls 24 to enter the annular groove 27 along the corresponding cylindrical through holes.

[0040] The end sleeve 26 is sleeved on the outer end of the limiting inner cylinder 23. The inner side wall of the end sleeve 26 is assembled with the threaded portion 29 arranged on the outer ring of the outer end of the limiting inner cylinder 23 through an internal thread. A reset cavity is arranged inside the end sleeve 26. One end of the reset cavity goes deep into the interior of the limiting inner cylinder 23. A reset pressing surface 31 is arranged on the inner side wall of the reset cavity close to one end of the limiting inner cylinder 23. The operating rod 22 passes through the interior of the reset cavity and is inserted deep into the reset pressing surface 31 through the reset pressing surface 31. The latch pin limiting spring 25 is inserted into the interior of the limiting inner cylinder 23, and the latch pin limiting spring 25 is sleeved on the operating rod 22 located inside the reset cavity. A reset pressure plate 30 located in the reset cavity is fixedly sleeved on the operating rod 22. One end of the latch pin limiting spring 25 presses against the reset pressure plate 30, and the other end of the latch pin limiting spring 25 presses against the reset pressing surface 31. The reset pressure plate 30 and the reset pressing surface 31 press the latch pin limiting spring 25, and the operating rod 22 is driven to perform reverse reset under the reverse force.

[0041] The actuator rod 10 is provided with a spherical end 20, a stepped groove 16, a connecting long plate 17, a reset circular plate 18 and a U-shaped plug plate 19. The spherical end 20 is arranged at one end of the actuator rod 10 close to the long latch hole 14, the connecting long plate 17 and the reset circular plate 18 are sleeved in the middle position of the actuator rod 10 and are fixedly connected to the actuator rod 10, the stepped groove 16 is arranged between the spherical end 20 and the connecting long plate 17, and the U-shaped plug plate 19 is arranged at one end of the actuator rod 10 away from the long latch hole 14.

[0042] The shell 2 is provided with a transmission long hole 13 which vertically passes through the long hole 14 of the latch, and the spherical end 20 passes through the transmission long hole 13 and goes deep into the long hole 14 of the latch. The shell 2 is provided with a U-shaped connecting groove 15 which is located at one end of the actuator rod 10 close to the U-shaped connecting groove 15. The U-shaped plug plate 19 is taken into the U-shaped connecting groove 15. A transmission reset spring 11 is provided between the reset circular plate 18 and the end of the U-shaped connecting groove 15. The transmission reset spring 11 is sleeved on the actuator rod 10. The low pressure of the transmission reset spring 11 is applied by the reset circular plate 18 and the end of the U-shaped connecting groove 15, thereby driving the actuator rod 10 to reset to a position close to the long hole 14 of the latch. The connecting long plate 17 and the reset circular plate 18 are both arranged perpendicular to the actuator rod 10. The connecting long plate 17 is arranged parallel to the operating interface position of the micro switch 9. The switch contact is arranged on the end surface of the micro switch 9 close to the connecting long plate 17, so that the connecting long plate 17 can be close to the micro switch 9 in the process of following the movement of the actuator rod 10, and the switch contact is subjected to low pressure through the connecting long plate 17. The micro switch 9 is installed inside the shell by fixing screws 8.

[0043] A sealing ring 12 is provided in the stepped groove 16 and is sleeved on the actuator rod 10. The sealing ring 12 is located inside the transmission long hole 13. A U-shaped limit plate 21 is provided on the top cover plate 1 and extends into the inside of the housing 2. The U-shaped limit plate 21 is arranged perpendicular to the actuator rod 10 and extends into the inside of the U-shaped connection groove 15. The end of the U-shaped limit plate 21 is close to the U-shaped plug plate 19 and there is a gap between the U-shaped plug plate 19, so that the actuator rod 10 can move in the U-shaped connection groove 15 and cannot rotate. A rubber gasket 5 is provided between the top cover plate 1 and the opening provided at the top of the housing 2. The top cover plate 1 is connected to the top of the housing 2 by connecting screws 7 passing through its four corners. An indicator light 4 is provided on the front side plate of the housing 2. The indicator light 4 is located on the side of the front side plate away from the long plug hole 14. The indicator light 4 and the micro switch 9 are both connected to the external components through the wiring harness 6 passing through the outer wall of the object. The indicator light 4 and the micro switch 9 are also connected through the wiring harness 6.

[0044] The working principle of the safety insurance device circuit is: when the aircraft control system is working normally, there is no need to insert the security plug 3, the micro switch 9 is in the normally closed state, and the total power signal of the control system is in the normally connected state; when the aircraft needs to be overhauled on the ground control system, the security plug 3 is inserted into the security plug 3 hole on the shell 2, and the internal mechanism will trigger the micro switch 9 to adjust from the normally closed state to the disconnected state. At this time, the total power signal of the control system is adjusted to the disconnected state, and the indicator light 4 will light up, the control system is in a safe state, and any ground maintenance action will not cause a safety accident in the control system; when the security plug 3 is unplugged before the aircraft takes off, the micro switch 9 returns to the normally closed state, and the total power signal of the control system is in the normally connected state again.

[0045] The specific method of using the safety insurance device is as follows: when the aircraft needs to be inspected in the ground control system, use the index finger and middle finger to clamp the outer cylindrical surface of the end sleeve 26 of the security latch 3, and then press the operating rod 22 with the thumb, the operating rod 22 moves toward the inside of the shell 2, and at the same time, the reset pressure plate 30 will compress the latch limit spring 25. When the reset pressure plate 30 and the limit inner cylinder 23 on the operating rod 22 are close to the outer end surface of the reset pressure plate 30, the operating rod 22 is pressed into place and can no longer move into the shell 2. At this time, the stepped groove 28 on the operating rod 22 moves to the left to the position of the two limit balls 24. The gap between the stepped groove 28 on the operating rod 22 and the inner hole of the limit inner cylinder 23 allows the two limit balls 24 to move toward the axial direction of the operating rod 22, keeping the operating rod 22 pressed into place, and inserting the security latch 3 as a whole into the long latch hole 14 on the shell 2.

[0046] When the left shoulder of the limiting inner cylinder 23 on the security latch 3 contacts the spherical end 20 on the actuator rod 10, as the security latch 3 is further inserted, the spherical end 20 on the actuator rod 10 will be pushed to move in the direction of the micro switch 9. When the spherical end 20 on the actuator rod 10 is completely moved back into the transmission long hole 13, the connecting long plate 17 on the actuator rod 10 will contact the contacts on the micro switch 9, and the micro switch 9 is adjusted from the normally closed state to the disconnected state. At this time, the key signal of the control system is in the disconnected state. When the security latch 3 is fully inserted into the long latch hole 14 on the shell 2, the left end face of the end sleeve 26 of the security latch 3 is completely fitted with the front side plate of the shell 2, and the two limiting balls 24 on the security latch 3 are just located at the annular groove 27 on the shell 2; at this time, the security latch 3 is released, and under the action of the latch limiting spring 25, the operating rod 22 will move toward the outside of the shell 2 to return to its normal state, and the operating rod 22 will push the two limiting balls 24 to move away from the axis of the operating rod 22, and just get stuck in the annular groove 27 on the shell 2, even if the security latch 3 is installed vertically downward on the machine, the security latch 3 will not fall off from the long latch hole 14 on the shell 2 under the action of gravity, and has a self-locking function; at this time, any action will not cause the control system to operate and further cause an accident, and ground maintenance work can be carried out.

[0047] Before the plane takes off, the ground personnel need to unplug the security latch 3. The specific steps are as follows: pinch the outer cylindrical surface of the end sleeve 26 of the security latch 3 with the index finger and the middle finger, and then press the operating rod 22 with the thumb. The operating rod 22 moves to the left, and the reset pressure plate 30 compresses the latch limit spring 25. When the reset pressure plate 30 of the operating rod 22 and the limit inner cylinder 23 are close to the outer end surface of the reset pressure plate 30, the operating rod 22 is pressed into place and can no longer move into the shell 2. At this time, the stepped groove 28 on the operating rod 22 moves to the left to the position of the two limit balls 24, and the stepped groove on the operating rod 22 The gap between 28 and the inner hole of the limiting inner cylinder 23 allows the two limiting balls 24 to move toward the axial direction of the operating rod 22, and the self-locking function is released; keep the operating rod 22 pressed in place, and pull the security latch 3 out of the long latch hole 14 on the shell 2 as a whole; when the security latch 3 is pulled out, under the action of the elastic force of the reset spring 11, the actuator rod 10 will move in the direction of the long latch hole 14, the connecting long plate 17 will be disengaged from the contacts on the micro switch 9, the micro switch 9 will return to the normally closed state, the control system's main power signal is connected and can work normally, and the indicator light 4 is off.

[0048] In summary, the present invention controls the disconnection of the main power signal of the aircraft avionics system by inserting the security plug to cause the internal micro switch to operate, which can avoid accidents such as system damage caused by misoperation during ground maintenance. The security plug has a self-locking function to prevent it from falling out of the security plug hole on the shell due to gravity after insertion, and no tools are required during use, which has the advantage of good operability. After the security plug is inserted, the indicator light on the front side panel lights up, which can directly indicate the on and off state of the main power signal of the aircraft avionics system, and has the advantage of good human-computer interaction.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A mechanical safety device, comprising a housing (2) and a top cover (1) detachably connected to the top of the housing (2), characterized in that: The housing (2) is provided with a latch mechanism, a transmission mechanism and a micro switch (9), the latch mechanism is provided with a safety latch (3), the transmission mechanism is provided with an actuator (10), a first pressing surface is provided at the middle position of the actuator (10), the micro switch (9) is provided with a switch contact, the safety latch (3) is inserted into the housing (2) laterally, and the end surface of the actuator (10) is pressed laterally, and after being transmitted by the actuator (10), the first pressing surface on the actuator (10) is driven to approach the micro switch (9), thereby pressing the switch contact on the micro switch (9), triggering the micro switch (9) to actuate, and changing the normally closed on or off state of the micro switch (9).

2. A mechanical safety device as claimed in claim 1, characterized in that: The safety latch (3) comprises an operating rod (22), a limiting inner cylinder (23), a limiting ball (24), a latch limiting spring (25) and an end sleeve (26); the operating rod (22) passes through the interior of the limiting inner cylinder (23) and is slidably connected to the interior of the limiting inner cylinder (23).

3. A mechanical safety device as claimed in claim 1, characterized in that: The inner end of the limiting inner cylinder (23) is provided with two symmetrically arranged cylindrical through holes, the number of the limiting balls (24) is two, and the two limiting balls (24) are respectively located inside the corresponding cylindrical through holes. The inner end of the limiting inner cylinder (23) is also provided with two stepped grooves (28), and the stepped grooves (28) are arranged at a position farther away from the inner end surface of the limiting inner cylinder (23) than the cylindrical through holes, and the area of ​​the stepped grooves (28) is larger than the cross section of the limiting balls (24), so that the corresponding limiting balls (24) can enter the stepped grooves (28) when the step grooves (28) follow the operating rod (22) to move to the cylindrical through hole position.

4. A mechanical safety device as claimed in claim 1, characterized in that: The housing (2) is provided with a long latch hole (14), the security latch (3) is laterally inserted into the long latch hole (14) and is slidably connected to the interior of the long latch hole (14), the interior of the long latch hole (14) is provided with an annular groove (27), and the security latch (3) can drive the cylindrical through hole inside it to move to the annular groove (27) during the process of penetrating into the long latch hole (14), thereby facilitating the two limiting balls (24) to enter the annular groove (27) along the corresponding cylindrical through holes.

5. A mechanical safety device as claimed in claim 1, characterized in that: The end sleeve (26) is sleeved on the outer end of the limiting inner cylinder (23), and the inner side wall of the end sleeve (26) is assembled with the threaded portion (29) arranged on the outer ring of the outer end of the limiting inner cylinder (23) through an internal thread. A reset cavity is arranged inside the end sleeve (26), and one end of the reset cavity penetrates into the interior of the limiting inner cylinder (23). A reset pressure surface (31) is arranged on the inner side wall of the reset cavity close to one end of the limiting inner cylinder (23). The operating rod (22) passes through the interior of the reset cavity and penetrates into the reset pressure surface (31) through the reset pressure surface (31). The latch pin limiting spring (25) is sleeved on the operating rod (22) located in the reset cavity, and the operating rod (22) is fixedly sleeved with a reset pressure plate (30) located in the reset cavity. One end of the latch pin limiting spring (25) is pressed against the reset pressure plate (30), and the other end of the latch pin limiting spring (25) is pressed against the reset pressure surface (31). The latch pin limiting spring (25) is pressed against the reset pressure plate (30) and the reset pressure surface (31), and the operating rod (22) is driven to perform reverse reset under the reverse force.

6. A mechanical safety device as claimed in claim 1, characterized in that: The actuator rod (10) is provided with a spherical end (20), a stepped groove (16), a connecting long plate (17), a reset circular plate (18) and a U-shaped plug plate (19); the spherical end (20) is arranged at one end of the actuator rod (10) close to the long latch hole (14); the connecting long plate (17) and the reset circular plate (18) are sleeved in the middle of the actuator rod (10) and are fixedly connected to the actuator rod (10); the stepped groove (16) is arranged between the spherical end (20) and the connecting long plate (17); and the U-shaped plug plate (19) is arranged at one end of the actuator rod (10) away from the long latch hole (14).

7. A mechanical safety device as claimed in claim 1, characterized in that: The shell (2) is provided with a transmission long hole (13) vertically passing through the long bolt hole (14); the spherical end (20) passes through the transmission long hole (13) and extends into the long bolt hole (14); the shell (2) is provided with a U-shaped connecting groove (15) located at one end of the actuator rod (10) close to the U-shaped connecting groove (15); the U-shaped plug plate (19) is inserted into the U-shaped connecting groove (15); a transmission reset spring (11) is provided between the reset circular plate (18) and the end of the U-shaped connecting groove (15); the transmission reset spring (11) is sleeved on the actuator rod (10); the reset circular plate (18) and the end of the U-shaped connecting groove (15) exert a low pressure on the transmission reset spring (11), thereby driving the actuator rod (10) to reset to a position close to the long bolt hole (14).

8. A mechanical safety device as claimed in claim 1, characterized in that: The connecting long plate (17) and the reset circular plate (18) are both arranged perpendicular to the actuator rod (10); the connecting long plate (17) is arranged parallel to the operation interface position of the micro switch (9); the switch contact is arranged on the end surface of the micro switch (9) close to the connecting long plate (17), so that the connecting long plate (17) can approach the micro switch (9) when following the movement of the actuator rod (10), and a low pressure is applied to the switch contact through the connecting long plate (17); and the micro switch (9) is installed inside the object by means of a fixing screw (8).

9. A mechanical safety device as claimed in claim 1, characterized in that: A sealing ring (12) sleeved on the actuator rod (10) is arranged in the stepped groove (16), and the sealing ring (12) is located inside the transmission long hole (13). A U-shaped limiting plate (21) is arranged on the top cover plate (1) and penetrates into the interior of the shell (2). The U-shaped limiting plate (21) is arranged perpendicular to the actuator rod (10). The U-shaped limiting plate (21) penetrates into the interior of the U-shaped connecting groove (15). The end of the U-shaped limiting plate (21) is close to the U-shaped plug plate (19) and there is a gap between the U-shaped plug plate (19), so that the actuator rod (10) can translate in the U-shaped connecting groove (15) but cannot rotate. A rubber gasket (5) is arranged between the top cover plate (1) and an opening arranged at the top of the shell (2). The top cover plate (1) is connected to the top of the shell (2) by connecting screws (7) passing through its four corners.

10. A mechanical safety device as claimed in claim 1, characterized in that: An indicator light (4) is provided on the front side plate of the housing (2). The indicator light (4) is located on a side of the front side plate away from the long latch hole (14). The indicator light (4) and the micro switch (9) are both connected to an external component via a wiring harness (6) passing through an outer wall of the housing. The indicator light (4) and the micro switch (9) are also connected to each other via the wiring harness (6).

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