Pluggable protection structure applied to digital conversion unit of electronic transformer

Abstract

The invention discloses a pluggable protection structure applied to a digital conversion unit of an electronic mutual inductor. The pluggable protection structure is used for solving the problem that an existing digital conversion unit cannot be replaced conveniently and cannot meet the protection requirement. The device comprises a cover shell, a bottom shell assembly, a mainboard assembly and a tool assembly, the shell assembly comprises a bottom shell, a golden finger adapter plate and a silica gel sealing gasket, the mainboard assembly comprises a golden finger mainboard, a spring bolt and a lock cylinder, and the silica gel sealing gasket is arranged in the space among the golden finger adapter plate, an aluminum profile, the bottom shell and the cover shell; the ADMU is simple in structure and convenient to use, the mainboard assembly is disassembled through the tool assembly, meanwhile, sealing between the mainboard assembly and the bottom shell assembly is mainly achieved through glue pouring and silica gel sealing gasket deformation sealing, and the ADMU can meet the pluggable requirement and the IP65 or IP67 protection grade at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of mutual inductors, and in particular to a pluggable protective structure applied to a digital conversion unit of an electronic mutual inductor. Background Art

[0002] Electronic transformers are divided into two categories according to the form of their secondary output: one is digital output type and the other is analog output type.

[0003] The digital output electronic transformer needs the output voltage signal of the electronic sensor, generates a digital signal through digital conversion, and the digital signal is framed to form serial data in accordance with the corresponding protocol format of IEC60870-5-1. It is finally sent to various automation devices and protection devices through the electrical isolation transmission system. The digital conversion unit is collectively referred to as ADMU. ADMU is mainly composed of electronic components and is installed at the pole switch containing the electronic sensor. Since the service life of primary equipment is mostly 20-30 years, and the service life of electronic products is generally 10-20 years, the integration of the two will affect the overall life of the primary equipment. Therefore, ADMU is required to be conveniently plugged and replaced as a whole. Usually, the IP level of the pole switch is generally IP65 or IP67, so ADMU is required to meet IP65 or IP67 while also realizing convenient plug-in and replacement operations over a long distance.

[0004] There are generally two ways to deal with ADMU on the market. One is to meet IP65 or IP67 but cannot be replaced, that is, the ADMU adopts a full glue-filling treatment method; the other is to be replaceable but cannot meet the IP65 or IP67 protection requirements.

[0005] It needs to be easy to replace, that is, plug-in devices need to be used, such as gold fingers, plug-in terminals (the operating space and method are limited and aviation plug-in devices cannot be used), etc. There are currently no products of this type of plug-in devices that meet IP65 or IP67, or even if there are, the cost is very high and cannot be mass-produced. Summary of the invention

[0006] To this end, the present application provides a pluggable protection structure applied to an electronic transformer digital conversion unit to solve the problem that the existing digital conversion unit cannot be easily replaced while meeting the protection requirements.

[0007] In order to achieve the above objectives, this application provides the following technical solutions:

[0008] A pluggable protective structure applied to an electronic transformer digital conversion unit, comprising: a cover shell, a bottom shell assembly, a mainboard assembly and a tool assembly;

[0009] The bottom shell assembly is installed on the side of the column switch, and the bottom shell assembly includes a bottom shell, the cover shell is arranged outside the bottom shell, and the bottom of the bottom shell is opened; the mainboard assembly is detachably connected to the lower part of the inside of the bottom shell;

[0010] The mainboard assembly includes an aluminum profile, a gold finger mainboard, and a lock tongue and a lock core located below the gold finger mainboard. A gold finger adapter plate is provided at the upper part of the interior of the bottom shell, a gold finger seat is provided at the bottom of the gold finger adapter plate, and a slot for inserting the gold finger mainboard is provided at the bottom of the gold finger seat; the space between the bottom surface of the gold finger adapter plate, the top surface of the aluminum profile, the inner side surface of the bottom shell and the inner side surface of the cover shell forms a first cavity corresponding to the outside of the gold finger seat, and a silicone sealing pad is provided in the first cavity;

[0011] The tool assembly is used for disassembling the mainboard assembly.

[0012] Optionally, the mainboard assembly also includes a first fixing plate and a second fixing plate, a first cover plate is arranged on the top of the aluminum profile, a first fixing plate and a second fixing plate are arranged in sequence below the aluminum profile, the lock tongue and the lock core are arranged between the first fixing plate and the second fixing plate, a lock hole is provided at the bottom of the lock tongue, one end of the lock tongue is provided on the outside of the lock core, a strip hole is provided on the front of the bottom shell, and the other end of the lock tongue passes through the strip hole.

[0013] Optionally, two first grooves are symmetrically arranged on both sides of the lock core, and a special-shaped hole matching the first grooves is opened inside the lock tongue.

[0014] Optionally, the strip-shaped hole is a trapezoidal structure, and the long bottom side of the trapezoidal structure faces the side of the lock tongue that rotates clockwise.

[0015] Optionally, two limit pins are provided on the first fixing plate, and the two limit pins are respectively located on both sides of the locking tongue.

[0016] Optionally, the space between the bottom shell, the gold finger adapter plate and the cover shell forms a second cavity, and an adapter wire is arranged in the second cavity;

[0017] The inner space of the aluminum profile forms a third cavity, and the second cavity and the third cavity are both sealed by sealing glue.

[0018] Optionally, the bottom shell assembly further comprises a pad and a bakelite seat, wherein the pad is arranged at the upper front portion of the bottom shell and a through hole for passing the bakelite seat is formed on the pad, and the bakelite seat is mounted on the side of the column switch.

[0019] Optionally, the tool assembly includes a rotating rod, and rotating protrusions are arranged on both sides of one end of the rotating rod.

[0020] Optionally, the height of the silicone sealing pad is 0.5 mm greater than the height of the gold finger seat;

[0021] The hardness of the silicone sealing pad is made of silicone material with a hardness of 20 and a roughness of no more than 10μm; the substrate surface of the gold finger seat and the corresponding surface of the mainboard assembly are made of FR-4 material PCB board with a roughness of no more than 5μm and a warpage of no more than 0.5%.

[0022] Optionally, the silicone sealing pad is bonded to the PCB board of the gold finger seat by using sealing glue.

[0023] Compared with the prior art, this application has at least the following beneficial effects:

[0024] Based on further analysis and research on the existing technical problems, the present application provides a pluggable protective structure applied to an electronic transformer digital conversion unit, including a cover shell, a bottom shell assembly, a mainboard assembly and a tool assembly. The shell assembly includes a bottom shell, a gold finger adapter plate and a silicone sealing gasket. The mainboard assembly includes a gold finger mainboard, a lock tongue and a lock core, and a silicone sealing gasket is arranged in the space between the gold finger adapter plate, the aluminum profile, the bottom shell and the cover shell. The present application has a simple structure and is easy to use. The mainboard assembly is disassembled by a tool assembly. At the same time, the sealing between the mainboard assembly and the bottom shell assembly is mainly achieved by glue filling + silicone sealing gasket deformation sealing, so that the ADMU can meet the problems of pluggable and IP65 or IP67 protection level at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0026] Figure 1 A schematic diagram of the external structure of a pluggable protective structure applied to an electronic transformer digital conversion unit provided in one embodiment of the present application;

[0027] Figure 2 Schematic diagram of the internal structure of a pluggable protection structure for an electronic transformer digital conversion unit provided in one embodiment of the present application Figure 1 ;

[0028] Figure 3 Schematic diagram of the internal structure of a pluggable protection structure for an electronic transformer digital conversion unit provided in one embodiment of the present application Figure 2 ;

[0029] Figure 4 for Figure 2 The cross-sectional view shown;

[0030] Figure 5 for Figure 2 Indication of the middle lock tongue and lock cylinder Figure 1 ;

[0031] Figure 6 for Figure 2 Indication of the middle lock tongue and lock cylinder Figure 2 ;

[0032] Figure 7 for Figure 2 A longitudinal cross-sectional view of the middle lock tongue and lock core;

[0033] Figure 8 for Figure 2 A transverse cross-sectional view of the middle lock tongue and lock core;

[0034] Fig. 9 for Figure 2 Indication of the middle lock tongue and lock cylinder Figure 3 ;

[0035] Fig.10 for Figure 2 Schematic diagram of the disassembly of the middle lock tongue and lock core Figure 1 ;

[0036] Fig.11 for Figure 2 Schematic diagram of the disassembly of the middle lock tongue and lock core Figure 2 ;

[0037] Fig.12 for Figure 2 Schematic diagram of the disassembly of the gold finger adapter board, gold finger seat and gold finger main board Figure 1 ;

[0038] Fig.13 for Figure 2 Schematic diagram of the disassembly of the gold finger adapter board, gold finger seat and gold finger main board Figure 2 ;

[0039] Fig.14 for Figure 2 Schematic diagram of the structure at the middle silicone sealing pad;

[0040] Fig.15 for Figure 2 Cross-sectional view of the middle silicone seal pad;

[0041] Fig.16 for Figure 2 Schematic diagram of the structure of the tool components.

[0042] Description of reference numerals:

[0043] 1. Cover;

[0044] 2. Bottom shell assembly; 21. Bottom shell; 211. Strip hole; 22. Gold finger adapter plate; 23. Gold finger seat; 231. Slot; 24. Silicone sealing pad; 25. First cavity; 26. Pad; 27. Bakelite seat; 28. Second cavity; 29. ​​First connecting plate; 210. Second connecting plate;

[0045] 3. Mainboard assembly; 31. Aluminum profile; 32. First cover plate; 33. Gold finger mainboard; 34. Lock tongue; 341. Special-shaped hole; 35. Lock core; 351. First groove; 352. Second groove; 353. Insertion hole; 36. First fixing plate; 37. Second fixing plate; 38. Third cavity; 39. Limiting pin; 310. Second cover plate; 311. First connecting column; 312. Second connecting column; 313. First fitting surface; 314. Second fitting surface;

[0046] 4. Tool assembly; 41. Rotating rod; 42. Rotating protrusion. DETAILED DESCRIPTION

[0047] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0048] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0049] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0050] An embodiment of the present application, such as Figure 1-Figure 16 As shown, a pluggable protective structure applied to an electronic transformer digital conversion unit comprises: a cover 1, a bottom shell assembly 2, a mainboard assembly 3 and a tool assembly 4;

[0051] The bottom shell component 2 is installed on the side of the column switch, and this part is mainly used to fix the gold finger adapter board 22 and the transfer function of the connection line between the column switch and the main board component 3;

[0052] The bottom shell assembly 2 includes a bottom shell 21 and a gold finger adapter plate 22. The cover shell 1 is arranged outside the bottom shell 21. The bottom shell 21 is a "door"-shaped structure, and the bottom of the bottom shell 21 is open. The lower part of the inside of the bottom shell 21 is detachably connected with the mainboard assembly 3. The main function of the cover shell 1 is to cover the structure from being directly exposed to rain and large particles.

[0053] The mainboard assembly 3 includes a gold finger mainboard 33 and a lock tongue 34 and a lock core 35 located below the gold finger mainboard 33. The upper part of the inner part of the bottom shell 21 is provided with a gold finger adapter plate 22, and the bottom of the gold finger adapter plate 22 is provided with a gold finger seat 23. The bottom of the gold finger seat 23 is provided with a slot 231 for inserting the gold finger mainboard 33 (see Fig.13 ); the space between the bottom surface of the gold finger adapter plate 22, the top surface of the aluminum profile 31 (specifically the first cover plate 32 described below), the inner side surface of the bottom shell 21 and the inner side surface of the cover shell 1 corresponds to the external space of the gold finger seat 23 to form a first cavity 25, and a silicone sealing pad 24 is arranged in the first cavity 25; the electrical function of the mainboard assembly 3 is to realize digital conversion, and the structural part mainly realizes the replaceable function, that is, the lock core 35, the lock tongue 34 and the tool assembly 4 cooperate to realize the replaceable function through push-pull action, and at the same time, the silicone sealing pad 24 of the bottom shell assembly 2 is pushed upward with appropriate force to realize the locking and sealing function;

[0054] The tool assembly 4 is used to disassemble the mainboard assembly 3 .

[0055] Preferably, the mainboard assembly 3 further includes an aluminum profile 31, a first fixing plate 36, and a second fixing plate 37. A first cover plate 32 is disposed on the top of the aluminum profile 31, and a first fixing plate 36 and a second fixing plate 37 are disposed in sequence below the aluminum profile 31. A lock tongue 34 and a lock core 35 are disposed between the first fixing plate 36 and the second fixing plate 37. A lock hole is provided at the bottom of the lock tongue 34, and one end of the lock tongue 34 is disposed outside the lock core 35. A strip hole 211 (such as Fig. 9 As shown), the other end of the locking tongue 34 passes through the strip hole 211, and the length of the strip hole 211 can make the locking tongue 34 separate from the bottom shell 21 after rotating 90 degrees.

[0056] Preferably, the lock core 35 is fixed to the first fixing plate 36 by screws.

[0057] Preferably, if Figure 7-Figure 11 As shown, two first grooves 351 are symmetrically arranged on both sides of the lock core 35 , and a special-shaped hole 341 matching with the first grooves 351 is opened inside the lock tongue 34 .

[0058] Further preferably, the strip-shaped hole 211 is a long trapezoidal structure, and the long bottom side of the trapezoidal structure faces the clockwise rotating side of the locking tongue 34 .

[0059] Still more preferably, if Figure 5-Figure 9 As shown, two limit pins 39 are provided on the first fixing plate 36. The two limit pins 39 are respectively located on both sides of the lock tongue 34 and are arranged in diagonal directions to limit the rotation position of the lock tongue 34 so that the lock tongue 34 can rotate 90°.

[0060] Preferably, if Fig.16 As shown, the tool assembly 4 includes a rotating rod 41, the rotating rod 41 is made of insulating material, and rotating protrusions 42 are symmetrically arranged on both sides of one end of the rotating rod 41; Fig.10 , Fig.11 As shown, a plug hole 353 for inserting the tool assembly 4 is opened horizontally at the bottom of the lock core 35, and two second grooves 352 connected to the plug hole 353 are symmetrically opened on the outer wall of the lock core 35, and the lower part of the lock core 35 is hollow.

[0061] Preferably, the bottom plate of the aluminum profile 31 is connected to the first fixing plate 36 via a first connecting column 311 , and the first fixing plate 36 is connected to the second fixing plate 37 via a second connecting column 312 .

[0062] Further preferably, a second cover plate 310 is provided on the outside of the bottom shell 21 at a position corresponding to the locking tongue 34 as a cover plate for the locking tongue 34 , and a third groove adapted to the locking tongue 34 is formed on the second cover plate 310 .

[0063] Preferably, the space between the inner side surface of the bottom shell 21, the top surface of the gold finger adapter plate 22 and the inner side surface of the cover shell 1 forms a second cavity 28, and an adapter line is arranged in the second cavity 28; the internal space between the first cover plate 32 and the aluminum profile 31 forms a third cavity 38, and the second cavity 28 and the third cavity 38 are both sealed with sealant.

[0064] Preferably, the bottom shell assembly 2 also includes a pad 26 and a bakelite seat 27. The pad 26 is arranged on the upper front portion of the bottom shell 21, and a through hole for passing the bakelite seat 27 is opened on the pad 26. The bakelite seat 27 is installed on the side of the switch on the column.

[0065] Preferably, two sides of the gold finger adapter plate 22 are correspondingly connected to the bottom shell 21 through a first connecting plate 29 and a second connecting plate 210 .

[0066] Further preferably, the first connecting plate 29 and the second connecting plate 210 are L-shaped structures, and the vertical plates of the first connecting plate 29 and the second connecting plate 210 are fixedly connected to the bottom shell 21, and the horizontal plates of the first connecting plate 29 and the second connecting plate 210 are connected to the gold finger adapter plate 22 by screws.

[0067] Preferably, the cover shell 1 and the bottom shell 21 are connected by screws.

[0068] In this application, the length and width of the aluminum profile 31 in the mainboard assembly 3 are adapted to the dimensions inside the bottom shell 21 and are sealed, wherein: Sealing description of the mainboard assembly 3 and the bottom shell assembly 2: Sealing is mainly achieved by glue pouring + silicone sealing pad 24 deformation sealing. Specifically, the sealing of the electrical part in the mainboard assembly 3 adopts the glue-filling sealing method, and the sealing of the transfer wiring cavity in the bottom shell assembly 2 also adopts the glue-filling sealing method; the joint part between the mainboard assembly 3 and the gold finger adapter plate 22 (i.e., the connection part with the gold finger adapter plate 22) is sealed by deforming the silicone seal 24. The key components of this part of the sealing process are the silicone seal 24 and the matching components with the fitting surface of the silicone seal 24 (including the first fitting surface 313 between the silicone seal 24 and the gold finger adapter plate 22, and the second fitting surface 314 between the silicone seal 24 and the first cover plate 32). The key indicators are the surface roughness and hardness of the silicone seal 24, the warpage and roughness of the fitting surface, and the key dimension is that the height of the silicone seal 24 is greater than the height of the gold finger seat 23 by 0.5mm. The hardness of the silicone seal 24 adopts a silicone material with a hardness of 20. (Shore A) and a roughness of no more than 10μm. The substrate surface of the gold finger seat 23 and the corresponding surface of the mainboard assembly 3 are made of FR-4 PCB material with a roughness of no more than 5 μm and a warpage of no more than 0.5%.

[0069] The silicone seal pad 24 is bonded to the PCB board of the gold finger seat 23 by using 704 sealant, and the gold finger seat 23 is completely embedded in the silicone seal pad 24 .

[0070] Description of the replaceable mainboard assembly of the above embodiment:

[0071] When it is necessary to disassemble the mainboard assembly 3, align the rotating rod 41 and the rotating protrusions 42 on both sides thereof with the insertion holes 353 at the bottom of the lock core 35 and insert them. After insertion, rotate the two rotating protrusions 42 to the position of the second grooves 352, and rotate the rotating rod 41 clockwise to drive the lock core 35 to rotate. At the same time, due to the cooperation between the first groove 351 of the lock core 35 and the special-shaped hole 341 of the lock tongue 34, the lock core 35 and the lock tongue 34 rotate synchronously. When the rotating rod 41 rotates 90°, one end of the lock tongue 34 stops rotating due to the restriction of the limit pin 39. At this time, the lock core 35 and the lock tongue 34 are separated from the bottom shell 21, and then the mainboard assembly 3 is pulled out through the rotating rod 41.

[0072] When the mainboard assembly 3 needs to be installed, the rotating rod 41 and the rotating protrusions 42 on both sides thereof are aligned with the insertion hole 353 at the bottom of the lock cylinder 35 and inserted, and the rotating rod 41 is rotated clockwise so that the lock tongue 34 is limited by the limit pin 39, thereby stopping the rotation; then, the mainboard assembly 3 and the tool assembly 4 are inserted as a whole along the bottom of the bottom shell 21, and the rotating rod 41 is used to apply appropriate force to push the mainboard assembly 3 to the inside of the bottom shell 21, so that the silicone sealing pad 24 is deformed. The pressure required for deformation of 0.5 mm is 0.5 kg / cm2, and the corresponding pressure is 0.05 MPa. The test condition of IP67 is 0.01 MPa, and the sealing silicone The sealing effect produced by the deformation of the pad can fully meet the requirements of IP67; when the silicone sealing pad 24 is deformed, the rotating rod 41 is then rotated counterclockwise. After rotating 90°, due to the limitation of another limit pin 39, the locking tongue 34 stops rotating, and the locking tongue 34 will be embedded in the bar hole 211 of the bottom shell 21, maintaining the deformation of the silicone sealing pad 24, thereby achieving a sealing effect; at the same time, when the mainboard assembly 3 is pushed up, due to the slope design of the bar hole 211, when squeezing the silicone sealing pad 24, the locking tongue 34 is tightened at a small angle, which can ensure that the pushing force of the mainboard assembly 3 is suitable and locked and cannot fall off; finally, the rotating rod 41 is rotated, and the tool assembly 4 is removed from the socket 353.

[0073] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A pluggable protection structure applied to an electronic transformer digital conversion unit, characterized in that: include: Cover, bottom case assembly, mainboard assembly and tool assembly; The bottom shell assembly is installed on the side of the column switch, and the bottom shell assembly includes a bottom shell, the cover shell is arranged outside the bottom shell, and the bottom of the bottom shell is opened; the mainboard assembly is detachably connected to the lower part of the inside of the bottom shell; The mainboard assembly includes an aluminum profile, a gold finger mainboard, and a lock tongue and a lock core located below the gold finger mainboard. A gold finger adapter plate is provided at the upper part of the interior of the bottom shell, a gold finger seat is provided at the bottom of the gold finger adapter plate, and a slot for inserting the gold finger mainboard is provided at the bottom of the gold finger seat; the space between the bottom surface of the gold finger adapter plate, the top surface of the aluminum profile, the inner side surface of the bottom shell and the inner side surface of the cover shell forms a first cavity corresponding to the outside of the gold finger seat, and a silicone sealing pad is provided in the first cavity; The tool assembly is used for disassembling the mainboard assembly.

2. The pluggable protection structure applied to the digital conversion unit of the electronic transformer according to claim 1 is characterized in that: The mainboard assembly also includes a first fixing plate and a second fixing plate. A first cover plate is arranged on the top of the aluminum profile, and a first fixing plate and a second fixing plate are arranged in sequence below the aluminum profile. The lock tongue and the lock core are arranged between the first fixing plate and the second fixing plate. A lock hole is provided at the bottom of the lock tongue, one end of the lock tongue is provided on the outside of the lock core, and a strip hole is provided on the front of the bottom shell, and the other end of the lock tongue passes through the strip hole.

3. The pluggable protection structure applied to the electronic transformer digital conversion unit according to claim 1 or 2, characterized in that: Two first grooves are symmetrically arranged on both sides of the lock core, and a special-shaped hole matching the first grooves is opened inside the lock tongue.

4. The pluggable protection structure applied to the electronic transformer digital conversion unit according to claim 2 is characterized in that: The strip-shaped hole is a trapezoidal structure, and the long bottom side of the trapezoidal structure faces the side of the lock tongue that rotates clockwise.

5. The pluggable protection structure applied to the digital conversion unit of the electronic transformer according to claim 2 is characterized in that: The first fixing plate is provided with two limit pins, and the two limit pins are respectively located on two sides of the locking tongue.

6. The pluggable protection structure applied to the electronic transformer digital conversion unit according to claim 2 is characterized in that: The space between the bottom shell, the gold finger adapter plate and the cover shell forms a second cavity, and an adapter wire is arranged in the second cavity; The inner space of the aluminum profile forms a third cavity, and the second cavity and the third cavity are both sealed by sealing glue.

7. The pluggable protection structure applied to the digital conversion unit of the electronic transformer according to claim 1 is characterized in that: The bottom shell assembly also includes a pad and a bakelite seat. The pad is arranged on the upper front part of the bottom shell, and a through hole for passing the bakelite seat is opened on the pad. The bakelite seat is installed on the side of the column switch.

8. The pluggable protection structure applied to the digital conversion unit of the electronic transformer according to claim 1 is characterized in that: The tool assembly comprises a rotating rod, and rotating protrusions are arranged on both sides of one end of the rotating rod.

9. The pluggable protection structure applied to the electronic transformer digital conversion unit according to claim 1, characterized in that: The height of the silicone sealing pad is 0.5 mm greater than the height of the gold finger seat; The hardness of the silicone sealing pad is made of silicone material with a hardness of 20 and a roughness of no more than 10μm; the substrate surface of the gold finger seat and the corresponding surface of the mainboard assembly are made of FR-4 material PCB board with a roughness of no more than 5μm and a warpage of no more than 0.5%.

10. The pluggable protection structure applied to the digital conversion unit of the electronic transformer according to claim 1 or 9, characterized in that: The silicone sealing pad is bonded to the PCB board of the gold finger seat by using sealing glue.

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