Solid-state relay with overheating protection function

Abstract

The invention is applied to the technical field of solid-state relays, and particularly discloses a solid-state relay with an overheating protection function, which comprises a mounting plane, a solid-state body is arranged on the outer surface of one end of the mounting plane, and a plug-in fixing mechanism is arranged between the mounting plane and cooling fins. And the solid body can be quickly and fixedly mounted on the side surface of the mounting plane through the insertion fixing mechanism, so that the solid body can be conveniently mounted. According to the solid-state relay with the overheating protection function, when the solid-state body is installed, the electrode plugging columns can be inserted into the plugging wiring base, so that the plugging wiring base and the solid-state body can be rapidly connected, and when the plugging wiring base is damaged, the flexible inverted buckle clamping hooks can be pried up, so that the solid-state body is prevented from being damaged. The plug-in wiring base can be taken out from the space between the mounting plane and the heat dissipation fins, the plug-in wiring base and the solid body can be conveniently mounted and replaced, and the connected cable does not need to be fixed by turning screws through a tool.

Description

Technical Field

[0001] The invention relates to the technical field of solid-state relays, and in particular to a solid-state relay with an overheat protection function. Background Art

[0002] With the development of electrification and automation, more and more devices and production equipment have adopted automation. Various parts are matched to enable the device to run smoothly. Relay is one of the more important electrical control devices. It can coordinate and interact between the input circuit and the output circuit. It is an automatic control switch that uses a small current to control the operation of a large current. It plays the role of safety protection, circuit conversion, automatic adjustment, etc. in the circuit. Most of the existing relays are fixedly installed in the control cabinet. When the solid-state relay is used, the internal temperature will gradually increase. Excessive temperature will cause the internal part of the solid-state relay to be affected by thermal stress, resulting in an increase in on-resistance. , the switching speed becomes slow, etc., thus affecting the normal operating performance, and causing long-term overheating to cause aging and damage of the internal components of the solid-state relay, thereby shortening the service life, and even causing the solid-state relay to be damaged and unable to work normally, and even cause circuit failure. In severe cases, it may even cause the solid-state relay to have a fire or other safety accident risk. When installing and using solid-state relays, not only is the wiring more troublesome, but most of the existing relays use a metal base plate as a heat sink. The metal base plate area of ​​the solid-state relay itself is small, which will result in extremely poor heat dissipation efficiency. In addition, when connecting the solid-state relay during use, the line can only be fixed by a screwdriver, which is more troublesome when wiring. Summary of the invention

[0003] The object of the present invention is to provide a solid-state relay with an overheat protection function to solve the problem of complicated installation and wiring of the solid-state relay mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solid-state relay with an overheating protection function, comprising a mounting plane, a solid body is arranged on the outer surface of one end of the mounting plane, and an iron plate is fixedly installed on the outer surface of the solid body, and the iron plate is in contact with the heating element in the solid body, positioning holes are provided on the outer surfaces of both ends of the solid body, a heat-conducting rubber is provided between the iron plate and the mounting plane, and a through hole is provided on the outer surface of the mounting plane, a heat dissipation fin is fixedly installed on the end of the solid body on the outer surface of the mounting plane away from the mounting plane, and the heat dissipation fin is hollowed out in a fishbone shape in the middle, and an installation groove is provided on the outer surface of the heat dissipation fin away from the mounting plane, and a plug-in fixing mechanism is provided between the mounting plane and the heat dissipation fin, and the solid body can be quickly fixedly installed on the side surface of the mounting plane through the plug-in fixing mechanism, so that the solid body can be installed conveniently.

[0005] Preferably, the plug-in fixing mechanism includes: a plug-in wiring base, which is inserted into the outer surface of the heat dissipation fins, and the heat dissipation fins and the plug-in wiring base are snap-connected, and flexible inverted hooks are fixedly installed on the outer surfaces of both ends of the plug-in wiring base, and the flexible inverted hooks are respectively snap-fitted with the heat dissipation fins and the mounting plane, and electrode plug-in posts are fixedly installed on the outer surfaces of both ends of the solid body, and the electrode plug-in posts are located at one end close to the mounting plane, and the plug-in wiring base is plugged into the electrode plug-in posts.

[0006] By adopting the above technical solution, the solid body can be inserted into the outer surface of the plug-in wiring base, the electrode plug-in column can be inserted into the interior of the plug-in wiring base, and the solid body can be conveniently connected to the plug-in wiring base without using screws for fixing and connecting.

[0007] Preferably, an overheating protection structure is provided in the through hole on the outer surface of the mounting plane, through which the heat generated by the solid-state body during operation can be conducted to the protection mechanism through the heat-conducting rubber, thereby reducing the probability of damage and failure of the solid-state body.

[0008] By adopting the above technical solution, the electrical components in the solid-state body can be protected, the stability of the solid-state body can be extended, and the service life of the solid-state body can be extended.

[0009] Preferably, the overheating protection structure includes: an outer shell, the outer surface of the through hole of the mounting plane is fitted with the through hole of the mounting plane, and the through hole of the mounting plane and the outer shell are of concentric design, a normally closed elastic connection component is fixedly installed on one end of the outer shell located outside the mounting plane, and both ends of the normally closed elastic connection component pass through the outer surface of the outer shell, an insulator is arranged inside the outer shell, and the insulator and the normally closed elastic connection component are slidably connected, and the normally closed elastic connection component is fitted with one end of the insulator, the insulator and the outer shell are of concentric design, and the outer shell is a circular barrel-shaped body made of plastic material, a memory metal sheet is arranged on the end of the outer shell away from the normally closed elastic connection component, and the outer surface of the memory metal sheet is fitted with the outer surface of the insulator, and the insulator and the memory metal sheet are of concentric design.

[0010] By adopting the above technical solution, the temperature generated by the solid-state body during operation can be conducted to the outer surface of the heat-conductive aluminum cover through the heat-conductive rubber, so that the memory metal sheet can absorb heat and deform, so that the memory metal sheet pushes the insulator to move, and the insulator pushes the normally closed elastic connection component, so that the circuit can be disconnected and the solid-state body stops working.

[0011] Preferably, a thermally conductive aluminum cover is threadedly installed on the outer surface of the mounting plane, and the thermally conductive aluminum cover is plugged into the outer surface of the outer shell, the outer shell and the thermally conductive aluminum cover are concentrically designed, and the outer surface of the thermally conductive aluminum cover is in contact with the outer surface of the memory metal sheet, a groove is provided on the outer surface of the thermally conductive aluminum cover, and the outer surface of the thermally conductive aluminum cover is in contact with the outer surface of the thermally conductive rubber.

[0012] By adopting the above technical solution, when the memory metal sheet fails and cannot be used, the heat-conducting aluminum cover can be rotated out from the installation plane through the groove on the outer surface of the heat-conducting aluminum cover, so as to facilitate the replacement of the failed memory metal sheet.

[0013] Preferably, an elastic plug-in fixing plate is fixedly installed on the side surface of one end of the shell away from the heat-conductive aluminum cover, and the elastic plug-in fixing plate is in contact with the outer surface of the mounting plane, and the mounting plane is engaged with the elastic plug-in fixing plate, and an insulating plug-in connector is plugged into the outer surface of the normally closed elastic connection component, and the insulating plug-in connector is connected to the plug-in wiring base, and the plug-in wiring base and the insulating plug-in connector are located on the inner side of the heat dissipation fins.

[0014] By adopting the above technical solution, the shell can be fixedly inserted into the through hole of the installation plane through the elastic plug-in fixing plate. When the normally closed elastic connection component is damaged, the elastic plug-in fixing plate can be pressed to separate the elastic plug-in fixing plate from the installation plane, making it convenient to install, disassemble and replace the shell.

[0015] Preferably, a limit positioning column is fixedly installed on the outer surface of the plug-in wiring base, and the limit positioning column is inserted into the positioning hole. A snap-fit ​​fixing mechanism is provided between the limit positioning column and the solid body. The connection between the solid body and the plug-in wiring base is strengthened by the snap-fit ​​fixing mechanism, so that the solid body can be more stable after the installation is completed.

[0016] By adopting the above technical solution, the solid body is limited by the insertion of the limiting positioning column and the positioning hole, so that the solid body can be more stable and the probability of bending and damage of the electrode plug-in column is reduced.

[0017] Preferably, the snap-fit ​​fixing mechanism includes: a snap-fit ​​plug-in hook, which is fixedly installed on the outer surface of one end of the limit positioning column, and a buckle fixing rod is arranged between the limit positioning columns, and the buckle fixing rod is engaged with the snap-fit ​​plug-in hook, the buckle fixing rod is a concave-shaped design, and the outer surface of the buckle fixing rod is in contact with the outer surface of the solid body.

[0018] By adopting the above technical solution, after the electrode plug-in column of the solid-state body is inserted into the interior of the plug-in wiring base, the buckle fixing rod can be inserted into the buckle plug hook at one end, and then the buckle fixing rod is pressed down to make the buckle fixing rod fit with the outer surface of the solid-state body, and the buckle fixing rod at the other end is buckled into the interior of the buckle plug hook, so that the solid-state body can be strengthened and fixed, reducing the falling of the solid-state body due to external forces and other factors.

[0019] Preferably, a heat dissipation fan is fixedly mounted on the outer surface of one end of the heat dissipation fin, and a protective cover is fixedly mounted on the side surface of the heat dissipation fan.

[0020] By adopting the above technical solution, the heat absorbed by the heat dissipation fins can be taken away by the rotation of the heat dissipation fan, thereby reducing the probability of overheating of the solid-state body.

[0021] Preferably, a wiring terminal is fixedly mounted on the outer surface of one end of the heat dissipation fin away from the heat dissipation fan, and a shielding cover is rotatably mounted on the outer surface of the wiring terminal, and a marking writing sticker is adhered to the outer surface of the shielding cover, and the wiring terminal is respectively interconnected with the plug-in wiring base, the insulating plug connector and the heat dissipation fan.

[0022] By adopting the above technical solution, the wiring of the normally closed elastic connection component, the insulating plug connector and the heat dissipation fan can be conveniently connected to the wiring terminals, and the access ends of the lines can be gathered together to facilitate subsequent connection and line tracing. The chance of electric shock can be reduced by using a shielding cover, and the wiring of the wiring terminals can be marked by marking stickers to reduce the chance of connecting the wrong lines.

[0023] Compared with the prior art, the present invention has the following beneficial effects: the solid-state relay with overheat protection function: 1. When the solid-state body is inserted into the outer surface of the installation plane, the electrode plug-in column will be inserted into the inside of the plug-in wiring base, so that the plug-in wiring base and the solid-state body can be quickly connected without using tools to screw and fix the connected cables. When the plug-in wiring base is damaged, the flexible undercut hook can be pried up to remove the plug-in wiring base from between the installation plane and the heat dissipation fins, so that the plug-in wiring base can be easily replaced, and the solid-state body can be easily installed and replaced; 2. When the solid-state body is running, the heat generated by the heating element can be transferred to the iron plate, and the heat can be transferred to the outer surface of the installation plane through the heat-conducting rubber, and the heat can be dissipated through the heat dissipation fins. The heat dissipation efficiency of the solid-state body is improved by expanding the heat dissipation area. At the same time, the memory metal sheet will also absorb heat. When the heat accumulates and the temperature rises, the memory metal sheet will deform and push the insulator, so that the line between the normally closed elastic connection components is disconnected, so that the solid-state body can stop working, so that the solid-state body can dissipate heat faster and run more stably, and the solid-state body can also stop working after exceeding the temperature; 3. After the solid body is installed, the positioning hole will be engaged with the limit positioning column, and then the buckle fixing rod can be inserted into the buckle plug hook and pressed down, and the other end of the buckle fixing rod can be buckled into the buckle plug hook. The solid body can be fixed between the plug-in wiring bases through the buckle fixing rod to prevent the solid body from displacement and falling, making the fixation of the solid body faster and more convenient; 4. The insulating plug connector can prevent the normally closed elastic connection component from contacting the heat sink fins and causing a short circuit, and the normally closed elastic connection component, the insulating plug connector and the circuit of the heat sink fan can be connected to the wiring terminal, so that the circuit can be conveniently concentrated on the wiring terminal to make wiring more convenient, and the closing of the shielding cover can prevent the wiring terminals from contacting and causing a short circuit, and the marking sticker can assist in identifying the circuit, reducing the probability of wrong wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat dissipation fins and the solid body of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the heat dissipation fins and the wiring terminals of the present invention; Figure 3 This is a schematic diagram of the three-dimensional explosion structure of the heat-conducting rubber and the iron plate of the present invention; Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the heat dissipation fins and the plug-in wiring base of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the buckle fixing rod and the buckle plug hook of the present invention; Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the heat dissipation fins and the heat dissipation fan of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the limit positioning column and the buckle fixing rod of the present invention; Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the heat dissipation fins and the housing of the present invention; Fig. 9 It is a schematic diagram of the exploded three-dimensional structure of the housing and the elastic plug-in fixing piece of the present invention; Fig.10It is a schematic diagram of the exploded three-dimensional structure of the wiring terminal and the shielding cover plate of the present invention.

[0025] In the figure: 1. Installation plane; 2. Heat sink fins; 3. Solid body; 4. Thermally conductive rubber; 5. Electrode plug-in column; 6. Shell; 7. Insulator; 8. Normally closed elastic connection component; 9. Memory metal sheet; 10. Thermally conductive aluminum cover; 11. Elastic plug-in fixing plate; 12. Insulated plug connector; 13. Plug-in wiring base; 14. Flexible inverted hook; 15. Limiting positioning column; 16. Press-fit fixing rod; 17. Snap-fit ​​plug hook; 18. Positioning hole; 19. Iron plate; 20. Cooling fan; 21. Protective cover; 22. Wiring terminal; 23. Shielding cover; 24. Marking writing sticker. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-10 The present invention provides a technical solution: a solid-state relay with an overheat protection function, comprising a mounting plane 1, a solid body 3 is arranged on the outer surface of one end of the mounting plane 1, and an iron plate 19 is fixedly installed on the outer surface of the solid body 3, and the iron plate 19 is in contact with the heating element in the solid body 3, positioning holes 18 are provided on the outer surfaces of both ends of the solid body 3, a heat-conducting rubber 4 is arranged between the iron plate 19 and the mounting plane 1, and a through hole is provided on the outer surface of the mounting plane 1, a heat dissipation fin 2 is fixedly installed on one end of the solid body 3 on the outer surface away from the mounting plane 1, and the heat dissipation fin 2 is a fishbone-shaped hollow design in the middle, and an installation groove is provided on the outer surface of the heat dissipation fin 2 on the end away from the mounting plane 1, and a plug-in fixing mechanism is arranged between the mounting plane 1 and the heat dissipation fin 2, and the solid body 3 can be quickly fixedly installed on the side surface of the mounting plane 1 through the plug-in fixing mechanism, so that the solid body 3 can be installed conveniently.

[0028] The heat generated during the operation of the solid body 3 can be discharged through the iron plate 19, and the heat is conducted to the installation plane 1 through the thermal conductive rubber 4, and then the heat is absorbed by the heat dissipation fins 2, thereby increasing the heat dissipation area of ​​the solid body 3, so that the temperature of the solid body 3 will not be too high to cause unstable operation, and the life of the solid body 3 is extended. The heat dissipation fins 2 can be fixed in the control cabinet through the installation groove, and the fishbone-shaped hollow design of the heat dissipation fins 2 enables a larger heat dissipation area, so that the heat dissipation of the solid body 3 can be more efficient.

[0029] The plug-in fixing mechanism includes: a plug-in wiring base 13, which is inserted into the outer surface of the heat dissipation fin 2, and the heat dissipation fin 2 and the plug-in wiring base 13 are snap-connected, and flexible inverted hooks 14 are fixedly installed on the outer surfaces of both ends of the plug-in wiring base 13, and the flexible inverted hooks 14 are snap-fitted with the heat dissipation fin 2 and the mounting plane 1 respectively, and electrode plug-in columns 5 are fixedly installed on the outer surfaces of both ends of the solid body 3, and the electrode plug-in columns 5 are located at one end close to the mounting plane 1, and the plug-in wiring base 13 is plugged with the electrode plug-in columns 5.

[0030] The plug-in wiring base 13 can be fixedly installed between the mounting plane 1 and the heat sink fins 2 by means of the flexible reverse hook 14, and then the solid body 3 can be inserted into the outer surface of the plug-in wiring base 13 to connect the electrode plug-in column 5 to the plug-in wiring base 13, so that the wire can be quickly connected to the solid body 3 without screwing in screws.

[0031] An overheat protection structure is arranged in the through hole on the outer surface of the mounting plane 1. Through the overheat protection mechanism, the heat generated by the solid body 3 during operation can be conducted to the protection mechanism through the heat-conducting rubber 4, thereby reducing the probability of damage and failure of the solid body 3. The overheat protection structure comprises: a shell 6, the shell 6 is fitted with the outer surface of the through hole of the mounting plane 1, and the through hole of the mounting plane 1 and the shell 6 are concentrically designed, a normally closed elastic connection component 8 is fixedly installed at one end of the shell 6 located outside the mounting plane 1, and both ends of the normally closed elastic connection component 8 pass through the outer surface of the shell 6, an insulator 7 is arranged inside the shell 6, and the insulator 7 is slidably connected to the normally closed elastic connection component 8, and the normally closed elastic connection component 8 is fitted with one end of the insulator 7, the insulator 7 and the shell 6 are concentrically designed, and the shell 6 is a circular barrel-shaped body made of plastic material, a memory metal sheet 9 is arranged at one end of the shell 6 away from the normally closed elastic connection component 8, and the outer surface of the memory metal sheet 9 is fitted with the outer surface of the insulator 7, and the insulator 7 and the memory metal sheet 9 are concentrically designed.

[0032] When the solid body 3 is running, heat will be generated. At this time, the heat will be conducted to the outer surface of the iron plate 19 and to the memory metal sheet 9 through the heat-conducting rubber 4. At this time, the memory metal sheet 9 will absorb the heat. When a fault occurs or other reasons cause heat accumulation and the temperature rises, the memory metal sheet 9 will deform and push the insulator 7, so that the insulator 7 pushes the normally closed elastic connection component 8, so that the passage of the normally closed elastic connection component 8 is disconnected, and the circuit of the solid body 3 is disconnected, so that the solid body 3 automatically stops working when the temperature is too high, reducing the breakdown of internal components of the solid body 3 due to excessive temperature, and reducing the probability of damage to the solid body 3.

[0033] A heat-conducting aluminum cover 10 is threadedly installed on the outer surface of the mounting plane 1, and the heat-conducting aluminum cover 10 is plugged into the outer surface of the outer shell 6. The outer shell 6 and the heat-conducting aluminum cover 10 are concentrically designed, and the outer surface of the heat-conducting aluminum cover 10 is in contact with the outer surface of the memory metal sheet 9. A groove is provided on the outer surface of the heat-conducting aluminum cover 10, and the outer surface of the heat-conducting aluminum cover 10 is in contact with the outer surface of the heat-conducting rubber 4.

[0034] Through the grooves on the outer surface of the heat-conducting aluminum cover 10, tools can be inserted into the interior of the heat-conducting aluminum cover 10, so that the heat-conducting aluminum cover 10 can be rotated to be installed and removed to the outer surface of the installation plane 1. At the same time, after the memory metal sheet 9 fails and cannot be deformed, the heat-conducting aluminum cover 10 can be removed and the memory metal sheet 9 can be taken out for replacement, thereby reducing the cost during use.

[0035] An elastic plug-in fixing plate 11 is fixedly installed on the side surface of one end of the shell 6 away from the heat-conducting aluminum cover 10, and the elastic plug-in fixing plate 11 is in contact with the outer surface of the mounting plane 1, and the mounting plane 1 is engaged with the elastic plug-in fixing plate 11, and an insulating plug connector 12 is plugged into the outer surface of the normally closed elastic connection component 8, and the insulating plug connector 12 is connected to a plug-in wiring base 13, and the plug-in wiring base 13 and the insulating plug connector 12 are located on the inner side of the heat dissipation fin 2.

[0036] The elastic plug-in fixing sheet 11 allows the housing 6 to be easily fixed and removed after being inserted into the interior of the mounting plane 1, and prevents the housing 6 from rotating at will, thereby improving the stability of the housing 6 and reducing the difficulty of maintenance and replacement. The insulating plug connector 12 can insulate the normally closed elastic connection component 8 and quickly connect the circuit.

[0037] A limit positioning column 15 is fixedly installed on the outer surface of the plug-in wiring base 13, and the limit positioning column 15 is plugged into the positioning hole 18. A snap-fit ​​fixing mechanism is provided between the limit positioning column 15 and the solid body 3. The snap-fit ​​fixing mechanism strengthens the connection between the solid body 3 and the plug-in wiring base 13, so that the solid body 3 can be more stable after installation.

[0038] The lateral position of the solid body 3 is limited by the engagement of the limiting positioning column 15 with the positioning hole 18, thereby reducing the displacement of the solid body 3 caused by external collision, reducing the probability of damage to the electrode plug-in column 5, and enhancing the plug-in stability of the solid body 3.

[0039] The snap-fit ​​fixing mechanism includes: a snap-fit ​​plug hook 17, which is fixedly installed on the outer surface of one end of the limit positioning column 15, and a buckle fixing rod 16 is arranged between the limit positioning columns 15, and the buckle fixing rod 16 is engaged with the snap-fit ​​plug hook 17, the buckle fixing rod 16 is a concave-shaped design, and the outer surface of the buckle fixing rod 16 is in contact with the outer surface of the solid body 3.

[0040] After the solid body 3 is installed on the outer surface of the mounting plane 1, one end of the buckle fixing rod 16 can be inserted into and buckled into the inside of the buckle plug hook 17, and then the buckle plug hook 17 is pressed down to contact the outer surface of the solid body 3, and then the other end of the buckle fixing rod 16 is buckled into the inside of the buckle plug hook 17, so that the solid body 3 can be quickly fixed and the chance of the solid body 3 falling is reduced.

[0041] A heat dissipation fan 20 is fixedly mounted on the outer surface of one end of the heat dissipation fin 2 , and a protective cover 21 is fixedly mounted on the side surface of the heat dissipation fan 20 .

[0042] The protective cover 21 can reduce the probability of external foreign matter and circuits entering the heat dissipation fan 20 , reduce the probability of damage to the heat dissipation fan 20 , and can quickly remove the temperature of the heat dissipation fins 2 through the heat dissipation fan 20 .

[0043] A terminal 22 is fixedly mounted on the outer surface of one end of the heat dissipation fin 2 away from the heat dissipation fan 20, and a shielding cover plate 23 is rotatably mounted on the outer surface of the terminal 22, and a marking writing sticker 24 is adhered to the outer surface of the shielding cover plate 23, and the terminal 22 is respectively interconnected with the plug-in wiring base 13, the insulating plug connector 12 and the heat dissipation fan 20.

[0044] The normally closed elastic connection component 8, the insulating plug connector 12 and the wires of the cooling fan 20 can all be connected and fixed to one end of the wiring terminal 22, so that the wiring can be gathered and fixed to facilitate the arrangement and connection of the lines. The shielding cover 23 can reduce the short circuit caused by external objects touching the wiring terminal 22. Together with the marking sticker 24, it is more convenient to connect the wires without having to find the wires, and the probability of wiring errors is reduced.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solid-state relay with an overheat protection function, comprising a mounting plane (1), a solid body (3) being arranged on the outer surface of one end of the mounting plane (1), and an iron plate (19) being fixedly mounted on the outer surface of the solid body (3), and the iron plate (19) being in contact with a heating element in the solid body (3), positioning holes (18) being provided on the outer surfaces of both ends of the solid body (3), a heat-conducting rubber (4) being arranged between the iron plate (19) and the mounting plane (1), and a through hole being provided on the outer surface of the mounting plane (1), a heat dissipation fin (2) being fixedly mounted on the outer surface of the solid body (3) away from the mounting plane (1), and the heat dissipation fin (2) being of a fishbone-shaped hollow design in the middle, and a mounting groove being provided on the outer surface of the heat dissipation fin (2) away from the mounting plane (1), Features: A plug-in fixing mechanism is provided between the installation plane (1) and the heat dissipation fins (2), and the solid body (3) can be quickly fixedly installed on the side surface of the installation plane (1) through the plug-in fixing mechanism, thereby facilitating the installation of the solid body (3).

2. A solid-state relay with overheat protection function according to claim 1, Features: The plug-in fixing mechanism comprises: a plug-in wiring base (13), the plug-in wiring base (13) is inserted into the outer surface of the heat dissipation fin (2), and the heat dissipation fin (2) and the plug-in wiring base (13) are snap-fitted, flexible inverted hooks (14) are fixedly mounted on the outer surfaces of both ends of the plug-in wiring base (13), and the flexible inverted hooks (14) are snap-fitted with the heat dissipation fin (2) and the mounting plane (1) respectively, and electrode plug-in posts (5) are fixedly mounted on the outer surfaces of both ends of the solid body (3), and the electrode plug-in posts (5) are located at one end close to the mounting plane (1), and the plug-in wiring base (13) and the electrode plug-in posts (5) are snap-fitted.

3. A solid-state relay with overheat protection function according to claim 1, Features: An overheat protection structure is provided in the through hole on the outer surface of the installation plane (1). The overheat protection structure allows the heat generated by the solid body (3) during operation to be conducted to the protection structure through the heat-conducting rubber (4), thereby reducing the probability of damage and failure of the solid body (3).

4. A solid-state relay with overheat protection function according to claim 3, Features: The overheat protection structure comprises: a shell (6), the shell (6) being fitted with the outer surface of the through hole of the mounting plane (1), and the through hole of the mounting plane (1) and the shell (6) being of concentric design; a normally closed elastic connection component (8) being fixedly mounted on one end of the shell (6) located outside the mounting plane (1), and both ends of the normally closed elastic connection component (8) pass through the outer surface of the shell (6); an insulator (7) being arranged inside the shell (6), and the insulator (7) and the normally closed elastic connection component (8) being slidably connected, and the normally closed elastic connection component (8) being fitted with one end of the insulator (7), the insulator (7) and the shell (6) being of concentric design, and the shell (6) being a circular barrel-shaped body made of plastic material; a memory metal sheet (9) being arranged at one end of the shell (6) away from the normally closed elastic connection component (8), and the outer surface of the memory metal sheet (9) being fitted with the outer surface of the insulator (7), and the insulator (7) and the memory metal sheet (9) being of concentric design.

5. A solid-state relay with overheat protection function according to claim 1, Features: A heat-conducting aluminum cover (10) is threadedly mounted on the outer surface of the mounting plane (1), and the heat-conducting aluminum cover (10) is plugged into the outer surface of the outer shell (6). The outer shell (6) and the heat-conducting aluminum cover (10) are concentrically designed, and the outer surface of the heat-conducting aluminum cover (10) is in contact with the outer surface of the memory metal sheet (9). A groove is provided on the outer surface of the heat-conducting aluminum cover (10), and the outer surface of the heat-conducting aluminum cover (10) is in contact with the outer surface of the heat-conducting rubber (4).

6. A solid-state relay with overheat protection function according to claim 4, Features: An elastic plug-in fixing sheet (11) is fixedly mounted on the side surface of one end of the housing (6) away from the heat-conducting aluminum cover (10), and the elastic plug-in fixing sheet (11) is in contact with the outer surface of the mounting plane (1), and the mounting plane (1) is engaged with the elastic plug-in fixing sheet (11), an insulating plug connector (12) is plugged into the outer surface of the normally closed elastic connection component (8), and the insulating plug connector (12) is connected to a plug-in wiring base (13), and the plug-in wiring base (13) and the insulating plug connector (12) are located on the inner side of the heat dissipation fins (2).

7. A solid-state relay with overheat protection function according to claim 2, Features: A limit positioning column (15) is fixedly mounted on the outer surface of the plug-in wiring base (13), and the limit positioning column (15) is plugged into the positioning hole (18). A buckling fixing mechanism is provided between the limit positioning column (15) and the solid body (3). The buckling fixing mechanism strengthens the connection between the solid body (3) and the plug-in wiring base (13), so that the solid body (3) can be more stable after installation.

8. A solid-state relay with overheat protection function according to claim 7, Features: The buckle fixing mechanism comprises: a buckle plug hook (17), the buckle plug hook (17) is fixedly mounted on the outer surface of one end of the limit positioning column (15), and a buckle fixing rod (16) is arranged between the limit positioning column (15), and the buckle fixing rod (16) is engaged with the buckle plug hook (17), the buckle fixing rod (16) is of concave design, and the outer surface of the buckle fixing rod (16) is in contact with the outer surface of the solid body (3).

9. A solid-state relay with overheat protection function according to claim 1, Features: A heat dissipation fan (20) is fixedly mounted on the outer surface of one end of the heat dissipation fin (2), and a protective cover (21) is fixedly mounted on the side surface of the heat dissipation fan (20).

10. A solid-state relay with overheat protection function according to claim 1, Features: A connection terminal (22) is fixedly mounted on the outer surface of one end of the heat dissipation fin (2) away from the heat dissipation fan (20), a shielding cover plate (23) is rotatably mounted on the outer surface of the connection terminal (22), and a marking sticker (24) is adhered to the outer surface of the shielding cover plate (23), and the connection terminal (22) is respectively interconnected with the plug-in connection base (13), the insulating plug connector (12) and the heat dissipation fan (20).

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