Elastic miniaturized electrostatic discharge device and preparation method thereof

Abstract

The invention discloses an elastic miniaturized electrostatic discharge device and a preparation method thereof. The device comprises a mounting seat outer cavity, a metal plate is arranged in the mounting seat outer cavity, one end of the metal plate is connected with one end of a mounting seat stud, the other end of the mounting seat stud is arranged outside the mounting seat outer cavity, and the other end of the mounting seat stud is connected with a discharge rod. The preparation method comprises the following steps: preparing the metal plate and the mounting seat stud, preparing the mounting seat outer cavity, preparing the discharge rod, and connecting the mounting seat stud with the discharge rod to obtain the device. The mounting base and the fuselage structure are conformal, the discharge rod has certain elasticity, slight impact force can be released, only the discharge rod needs to be replaced during later maintenance, the mounting base does not need to be detached from the fuselage, only the discharge rod is exposed, and aerodynamic performance cannot be affected.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrostatic protection, and in particular relates to a miniaturized electrostatic discharge device with elasticity, and also relates to a method for preparing the miniaturized electrostatic discharge device with elasticity. Background Art

[0002] When an aircraft is flying at high speed, passing through clouds, ice crystals or dust, the friction and collision with the aircraft, the collision between charged particles in the atmosphere and the aircraft, and the combustion and ejection of the aircraft engine will all make the aircraft charged. The accumulation of static charge will interfere with radio communication operations or other amplitude modulation equipment. During the flight operations of takeoff and landing, this communication interference will cause particularly dangerous situations. Therefore, it is necessary to install electrostatic discharge devices on the wings or fuselage of the aircraft, where static charge is easily accumulated. When the static charge accumulation on the surface of the aircraft reaches the discharge threshold voltage, corona discharge will occur at the discharge tip of the electrostatic discharge device, releasing the static charge on the surface of the aircraft, reducing the interference of static discharge on radio signals, and ensuring the safe operation of the aircraft.

[0003] At present, commonly used electrostatic discharge devices include composite high-resistance electrostatic dischargers and metal low-resistance electrostatic dischargers. The installation methods of the two types of electrostatic dischargers are mainly screwing, riveting and bonding. When using screwing or riveting for installation, it is necessary to punch holes on the skin of the aircraft installation position to ensure the installation strength of the electrostatic discharger so that the installation surface and the aircraft surface are closely fitted to form a conductive path. Whether it is a composite high-resistance or metal low-resistance electrostatic discharger, after being installed on the aircraft skin surface, there are large protruding dimensions in the horizontal and vertical directions of the aircraft. The protruding part will increase wind resistance and affect the aerodynamic performance of the aircraft; in addition, the commonly used electrostatic discharge device is an integrated structure design, so when it is damaged and replaced, it is necessary to remove the screws or rivets connected to the skin, but multiple disassembly will cause irreversible damage to the aircraft skin. Summary of the invention The purpose of the present invention is to provide a miniaturized electrostatic discharge device with flexibility, so as to solve the problem that the existing electrostatic discharge device has protruding parts after installation, which increases the wind resistance and is inconvenient to repair and replace.

[0004] Another object of the present invention is to provide a method for preparing a miniaturized electrostatic discharge device with flexibility.

[0005] The first technical solution adopted by the present invention is a miniaturized elastic electrostatic discharge device, which includes an outer cavity of a mounting base, a metal plate is arranged in the outer cavity of the mounting base, one end of the metal plate is connected to one end of a mounting base stud, the other end of the mounting base stud is arranged outside the outer cavity of the mounting base, and the other end of the mounting base stud is connected to a discharge rod.

[0006] The first technical solution of the present invention is also characterized in that: Furthermore, the discharge rod comprises a thick rod section, one end of which is provided with a threaded hole, the other end of which is connected to a thin rod section via a conical surface, and the threaded hole is threadedly connected to a mounting seat stud.

[0007] Furthermore, the thick rod segment, the thin rod segment and the side wall of the cone surface are all coated with a conductive layer.

[0008] Furthermore, an even number of flat surfaces are arranged on the side wall of the thick rod section and at equal intervals along the circumference thereof.

[0009] The second technical solution adopted by the present invention is a method for preparing a miniaturized electrostatic discharge device with elasticity, which is specifically implemented according to the following steps: Step 1, machining to obtain metal plates and mounting seat studs according to design drawings; Step 2, using glass fiber prepreg to wrap the metal plate to prepare the outer cavity of the mounting seat; Step 3, using polyimide to prepare a discharge rod semi-finished product; Step 4, spraying an electrostatic conductive solution on the surface of the semi-finished discharge rod obtained in step 3 to form a conductive layer to obtain a discharge rod; Step 5, after the discharge rod obtained in step 4 is threadedly connected to the mounting base stud, a miniaturized electrostatic discharge device with elasticity is obtained.

[0010] The second technical solution of the present invention is also characterized in that: Furthermore, the specific process of step 2 is: Step 2.1, laying 2 to 10 layers of glass fiber prepreg on the upper and lower surfaces of the metal plate obtained in step 1, respectively, and laying adhesive film between two adjacent layers of glass fiber prepreg and between the glass fiber prepreg and the metal plate; Step 2.2, placing the metal plate laid in step 2.1 into a mold for mold closing, and then curing to obtain an outer cavity of the mounting seat.

[0011] Further, in step 2.2, the mold includes an upper mold and a lower mold, a cavity is arranged on the contacting surfaces of the upper mold and the lower mold, a through hole is arranged on the upper mold, a blind hole is arranged on the lower mold, the through hole and the blind hole correspond to each other and constitute edge reserved holes, and a paved metal plate is arranged in the cavity; The curing process is as follows: heating rate is 1℃ / min-10℃ / min, heating to 100℃-300℃, keeping warm for 180min, cooling to no higher than 25℃ at a rate of ≤2℃ / min and taking out of the oven.

[0012] Furthermore, step 3 specifically involves using polyimide to perform mechanical processing or injection molding according to the drawings to obtain a discharge rod semi-finished product.

[0013] Furthermore, the injection molding process is as follows: the injection molding temperature is 280° C. to 300° C., the injection molding time is 2s to 5s, and the injection molding pressure is 100MPa to 150MPa.

[0014] The beneficial effects of the present invention are: (1) The present invention has a miniaturized electrostatic discharge device with elasticity. The outer cavity of the mounting seat conforms to the shape of the fuselage and is flush with the fuselage skin. Only the discharge rod is exposed, which will not affect the aerodynamic performance. The discharge rod is threadedly connected to the stud of the mounting seat, which is easy to replace and convenient for later maintenance. (2) The present invention has a flexible miniaturized electrostatic discharge device, which ensures that the requirements of electrostatic discharge and continuous discharge can be achieved in a small size and meets the discharge performance requirements; (3) In the method for preparing the elastic miniaturized electrostatic discharge device of the present invention, the discharge rod is made of polyimide material, so that the discharge rod has a certain elasticity and can release slight impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a miniaturized electrostatic discharge device with flexibility according to the present invention; Figure 2 It is a schematic diagram of the connection between the metal plate and the outer cavity of the mounting base in the miniaturized electrostatic discharge device with elasticity of the present invention; Figure 3 It is a schematic structural diagram of a discharge rod in a miniaturized electrostatic discharge device with elasticity according to the present invention; Figure 4 A cross-sectional view of a discharge rod in a miniaturized electrostatic discharge device with elasticity according to the present invention; Figure 5 It is a schematic diagram of the installation of the miniaturized electrostatic discharge device with flexibility and the body of the present invention; Figure 6 A cross-sectional view of a mold in a method for preparing a miniaturized electrostatic discharge device with elasticity according to the present invention; Figure 7 The discharge current curve diagram of the elastic miniaturized electrostatic discharge device prepared by the method of the present invention.

[0016] In the figure, 1. discharge rod, 2. mounting base stud, 3. metal plate, 4. mounting base outer cavity, 5. flat surface, 6. threaded hole, 7. thick rod section, 8. thin rod section, 9. conical surface, 10. upper die, 11. lower die, 12. cavity, 13. edge reserved hole. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 The present invention has a flexible miniaturized electrostatic discharge device, the structure of which is as follows Figure 1 and Figure 2 As shown, it is composed of a mounting base and a discharge rod 1 connected together. The mounting base is a sandwich structure, specifically including a mounting base outer cavity 4. The mounting base outer cavity 4 is connected to the aircraft fuselage by means of threads or rivets. The mounting base outer cavity 4 is conformal to the aircraft fuselage shape and is flush with the fuselage skin. A metal plate 3 is arranged in the mounting base outer cavity 4. The metal plate 3 is made of stainless steel. The metal plate 3 can not only improve the strength of the entire mounting base, but also the stainless steel material can serve as an internal conductive path to conduct the static charge of the fuselage to the discharge rod 1. One end of the metal plate 3 is connected to one end of the mounting base stud 2. The other end of the mounting base stud 2 is arranged outside the mounting base outer cavity 4. The other end of the mounting base stud 2 is connected to the discharge rod 1. The length of the discharge rod 1 is not more than 50 mm, and the size is relatively small.

[0019] like Figure 3 and Figure 4 As shown, the discharge rod 1 includes a thick rod section 7, one end of the thick rod section 7 is provided with a threaded hole 6, and the other end of the thick rod section 7 is connected to a thin rod section 8 through a conical surface 9, so the thick rod section 7, the conical surface 9 and the thin rod section 8 constitute a variable diameter structure. The design of the variable diameter structure improves the foldability of the discharge rod 1, and it will not break under conventional aircraft vibration conditions. When subjected to a large external force collision, the discharge rod breaks at the diameter change point, and the mounting seat will not be damaged, which can improve the overall maintainability. An even number of flat surfaces 5 are provided on the side wall of the thick rod section 7 and along its circumferential direction at equal intervals. When replacing the discharge rod 1, the discharge rod 1 can be rotated to be disassembled by clamping the flat surface 5, which is easy to operate. The threaded hole 6 is threadedly connected to the mounting seat stud 2, and the threaded connection can be easily disassembled during replacement, and there is no need to disassemble the mounting seat connected to the fuselage skin, so the fuselage skin will not be damaged. The thick rod section 7, the thin rod section 8 and the side walls of the conical surface 9 are all coated with a conductive layer, and the conductive layer resistance is 0.1MΩ-200MΩ, which is used for static charge conduction.

[0020] The present invention has a flexible miniaturized electrostatic discharge device installation such as Figure 5 As shown, during installation, a part of the aircraft fuselage structure needs to be dug out as the installation position of the electrostatic discharge device of the present invention. It is generally installed at the trailing edge of the aircraft wing, tail wing, etc. The shape of the mounting seat is conformal to the aircraft fuselage and flush with the fuselage skin. The mounting seat is connected to the fuselage by threading or riveting, and only the discharge rod 1 is exposed.

[0021] The principle of the elastic miniaturized electrostatic discharge device of the present invention is specifically as follows: the metal plate 3 serves as an electrostatic charge transmission channel inside the mounting base, which can transmit the electrostatic charge of the fuselage to the discharge rod 1 and finally reach the discharge end (the end of the discharge rod 1 away from the mounting base stud 2) for release. The discharge rod 1 is designed to be a small rod to ensure the effective release of static charge.

[0022] Example 2 The method for preparing the miniaturized electrostatic discharge device with flexibility of the present invention is specifically implemented according to the following steps: Step 1, mechanically process the metal plate 3 and the mounting seat stud 2 according to the design drawing, the metal plate 3 and the mounting seat stud 2 are integrally formed, and both are made of stainless steel; Step 2, using glass fiber prepreg to wrap the metal plate 3 to prepare the outer cavity 4 of the mounting seat; The specific process is: Step 2.1, laying 2 to 10 layers of glass fiber prepreg on the upper and lower surfaces of the metal plate 3 obtained in step 1, respectively, and laying adhesive film between two adjacent layers of glass fiber prepreg and between the glass fiber prepreg and the metal plate 3; Among them, the glass fiber prepreg can be AR glass fiber (alkali-resistant glass fiber) or other glass fibers that meet the requirements of aerospace; Step 2.2, placing the metal plate 3 laid in step 2.1 into a mold for mold closing, and then curing to obtain an outer cavity 4 of the mounting seat; The curing process is as follows: the temperature rises at a rate of 1°C / min-10°C / min, rises to 100°C-300°C, and is kept at this temperature for 180 minutes. After the temperature is kept at this temperature, the temperature is lowered to no higher than 25°C at a rate of ≤2°C / min before being taken out of the oven. like Figure 6 As shown, the mold includes an upper mold 10 and a lower mold 11, and a cavity 12 is arranged on the contact surface of the upper mold 10 and the lower mold 11. A through hole is arranged on the upper mold 10, and a blind hole is arranged on the lower mold 11. The through hole and the blind hole correspond to each other, and the through hole and the blind hole form an edge reserved hole 13. The paved metal plate 3 is arranged in the cavity 12, and the edge reserved hole 13 is used to fasten the upper mold and the lower mold, so as to compact the paved metal plate 3, and the mold clearance between the paved metal plate 3 and the mold is not more than 0.01mm; The mold clearance includes the clearance between the metal plate 3 after paving and the side walls and upper and lower surfaces of the cavity 12; Step 3, using polyimide to perform mechanical processing or injection molding according to the drawing to obtain a semi-finished discharge rod 1; The specific process of the injection molding process is as follows: preheating the discharge rod mold at a preheating temperature of 100°C to 150°C, injecting the molten polyimide into the discharge rod mold through an injection molding machine to fill the discharge rod mold, the injection molding temperature is 280°C to 300°C, the injection molding time is 2s to 5s, the injection molding pressure is 100MPa to 150MPa, after the injection molding is completed, the discharge rod mold is closed and the cooling stage begins, the cooling time is 30s to 60s, after the cooling is completed, the mold is opened to take out the discharge rod 1 semi-finished product; The semi-finished discharge rod 1 comprises a thick rod section 7, one end of which is provided with a threaded hole 6, the other end of which is connected with a thin rod section 8 via a conical surface 9, the threaded hole 6 is threadedly connected with a mounting seat stud 2, and an even number of flat surfaces 5 are provided on the side wall of the thick rod section 7 and at equal intervals along its circumference; Step 4, spraying an electrostatic conductive solution on the surface of the semi-finished discharge rod 1 obtained in step 3 to form a conductive layer, the resistance of the conductive layer is 0.1MΩ-200MΩ, the thickness of the conductive layer is 0.01mm-0.02mm, and the discharge rod 1 is obtained, and the length of the discharge rod 1 is not more than 50mm; The conductive solution comprises conductive particles and a solvent, and the mass concentration of the conductive solution is 2% to 15%, wherein the conductive particles are one of carbon black, carbon nanotubes or graphene, and the solvent is one of NN-dimethylformamide, dimethyl sulfoxide, nitrogen methyl pyrrolidone or dichloromethane; Step 5, after the discharge rod 1 obtained in step 4 is threadedly connected with the mounting base stud 2, a miniaturized electrostatic discharge device with elasticity is obtained.

[0023] Example 3 This embodiment provides a method for preparing a miniaturized electrostatic discharge device with flexibility, which is specifically implemented according to the following steps: Step 1, mechanically processing according to the design drawing to obtain an integrally formed stainless steel metal plate 3 and a stainless steel mounting seat stud 2; Step 2, using glass fiber prepreg to wrap the metal plate 3 to prepare the outer cavity 4 of the mounting seat; The specific process is: Step 2.1, paving 6 layers of AR glass fiber on the upper and lower surfaces of the metal plate 3 obtained in step 1, respectively, and laying adhesive film between two adjacent layers of AR glass fiber and between the AR glass fiber and the metal plate 3, so as to increase the bonding strength between the AR glass fibers by laying the adhesive film, and compacting each layer of AR glass fiber after laying to ensure smooth laying without leakage of metal plate; Step 2.2, placing the metal plate 3 after paving in step 2.1 into the mold for mold closing, the mold closing gap between the paved metal plate 3 and the mold is not greater than 0.01mm, raising the temperature to 200°C at a heating rate of 5°C / min, keeping the temperature for 180min for curing, and then cooling at a rate of 1°C / min to no higher than 25°C to obtain the outer cavity 4 of the mounting seat; The structure of the mold is the structure described in Example 2; Step 3, using polyimide to perform injection molding according to the drawing to obtain a semi-finished discharge rod 1; The specific process of injection molding is as follows: preheating the discharge rod mold to 120°C, injecting the molten polyimide into the discharge rod mold through an injection molding machine to fill the discharge rod mold, the injection molding temperature is 290°C, the injection molding time is 4s, the injection molding pressure is 120MPa, after the injection molding is completed, the discharge rod mold is closed and the cooling stage begins, the cooling time is 45s, after the cooling is completed, the mold is opened to take out the discharge rod 1 semi-finished product; The discharge rod mold comprises a mold body, and an inner cavity is arranged in the mold body, and the inner cavity is consistent with the shape of the discharge rod 1 designed in the drawing; The semi-finished discharge rod 1 comprises a thick rod section 7, one end of which is provided with a threaded hole 6, the other end of which is connected with a thin rod section 8 via a conical surface 9, the threaded hole 6 is threadedly connected with a mounting seat stud 2, and an even number of flat surfaces 5 are provided on the side wall of the thick rod section 7 and at equal intervals along its circumference; Step 4, spraying an electrostatic conductive solution on the surface of the semi-finished discharge rod 1 obtained in step 3 to form a conductive layer, the resistance of the conductive layer is 100MΩ, the thickness of the conductive layer is 0.02mm, and a discharge rod 1 with a length of 50mm is obtained; The conductive solution is composed of carbon black and NN-dimethylformamide with a mass concentration of 10%. Step 5, after the discharge rod 1 obtained in step 4 is threadedly connected with the mounting base stud 2, a miniaturized electrostatic discharge device with elasticity is obtained.

[0024] Example 4 This embodiment provides a method for preparing a miniaturized electrostatic discharge device with flexibility, which is specifically implemented according to the following steps: Step 1, mechanically processing according to the design drawing to obtain an integrally formed stainless steel metal plate 3 and a stainless steel mounting seat stud 2; Step 2, using glass fiber prepreg to wrap the metal plate 3 to prepare the outer cavity 4 of the mounting seat; The specific process is: Step 2.1, paving two layers of AR glass fiber on the upper and lower surfaces of the metal plate 3 obtained in step 1, respectively, and laying adhesive film between two adjacent layers of AR glass fiber and between the AR glass fiber and the metal plate 3, so as to increase the bonding strength between the AR glass fibers by laying the adhesive film, and compacting each layer of AR glass fiber after laying to ensure smooth laying without metal plate leakage; Step 2.2, placing the metal plate 3 after paving in step 2.1 into the mold for mold closing, the mold closing gap between the paved metal plate 3 and the mold is not greater than 0.01mm, raising the temperature to 100°C at a heating rate of 1°C / min, keeping the temperature for 180min for curing, and then cooling at a rate of 1°C / min to no higher than 25°C to obtain the outer cavity 4 of the mounting seat; The structure of the mold is the structure described in Example 2; Step 3, using polyimide to perform injection molding according to the drawing to obtain a semi-finished discharge rod 1; The specific process of injection molding is as follows: preheating the discharge rod mold to 100°C, injecting the molten polyimide into the discharge rod mold through an injection molding machine to fill the discharge rod mold, the injection molding temperature is 280°C, the injection molding time is 5s, the injection molding pressure is 150MPa, after the injection molding is completed, the discharge rod mold is closed and the cooling stage begins, the cooling time is 30s, after the cooling is completed, the mold is opened to take out the discharge rod 1 semi-finished product; The discharge rod mold comprises a mold body, and an inner cavity is arranged in the mold body, and the inner cavity is consistent with the shape of the discharge rod 1 designed in the drawing; The semi-finished discharge rod 1 comprises a thick rod section 7, one end of which is provided with a threaded hole 6, the other end of which is connected with a thin rod section 8 via a conical surface 9, the threaded hole 6 is threadedly connected with a mounting seat stud 2, and an even number of flat surfaces 5 are provided on the side wall of the thick rod section 7 and at equal intervals along its circumference; Step 4, spraying an electrostatic conductive solution on the surface of the semi-finished discharge rod 1 obtained in step 3 to form a conductive layer, the resistance of the conductive layer is 0.1MΩ, the thickness of the conductive layer is 0.01mm, and a discharge rod 1 with a length of 50mm is obtained; The conductive solution is composed of carbon nanotubes and dimethyl sulfoxide with a mass concentration of 2%. Step 5, after the discharge rod 1 obtained in step 4 is threadedly connected with the mounting base stud 2, a miniaturized electrostatic discharge device with elasticity is obtained.

[0025] Example 5 This embodiment provides a method for preparing a miniaturized electrostatic discharge device with flexibility, which is specifically implemented according to the following steps: Step 1, mechanically processing according to the design drawing to obtain an integrally formed stainless steel metal plate 3 and a stainless steel mounting seat stud 2; Step 2, using glass fiber prepreg to wrap the metal plate 3 to prepare the outer cavity 4 of the mounting seat; The specific process is: Step 2.1, paving 10 layers of AR glass fiber on the upper and lower surfaces of the metal plate 3 obtained in step 1, respectively, and laying adhesive film between two adjacent layers of AR glass fiber and between the AR glass fiber and the metal plate 3, so as to increase the bonding strength between the AR glass fibers by laying the adhesive film, and compacting each layer of AR glass fiber after laying to ensure smooth laying without metal plate leakage; Step 2.2, placing the metal plate 3 after paving in step 2.1 into the mold for mold closing, the mold closing gap between the paved metal plate 3 and the mold is not greater than 0.01mm, raising the temperature to 300°C at a heating rate of 10°C / min, keeping the temperature for 180min for curing, and then cooling at a rate of 2°C / min to no higher than 25°C to obtain the outer cavity 4 of the mounting seat; The structure of the mold is the structure described in Example 2; Step 3, using polyimide to perform injection molding according to the drawing to obtain a semi-finished discharge rod 1; The specific process of injection molding is as follows: preheating the discharge rod mold at a preheating temperature of 150°C, injecting the molten polyimide into the discharge rod mold through an injection molding machine to fill the discharge rod mold, the injection molding temperature is 300°C, the injection molding time is 2s, the injection molding pressure is 100MPa, after the injection molding is completed, the discharge rod mold is closed and the cooling stage begins, the cooling time is 60s, after the cooling is completed, the mold is opened to take out the discharge rod 1 semi-finished product; The discharge rod mold comprises a mold body, and an inner cavity is arranged in the mold body, and the inner cavity is consistent with the shape of the discharge rod 1 designed in the drawing; The semi-finished discharge rod 1 comprises a thick rod section 7, one end of which is provided with a threaded hole 6, the other end of which is connected with a thin rod section 8 via a conical surface 9, the threaded hole 6 is threadedly connected with a mounting seat stud 2, and an even number of flat surfaces 5 are provided on the side wall of the thick rod section 7 and at equal intervals along its circumference; Step 4, spraying an electrostatic conductive solution on the surface of the semi-finished discharge rod 1 obtained in step 3 to form a conductive layer, the resistance of the conductive layer is 200MΩ, the thickness of the conductive layer is 0.01mm, and a discharge rod 1 with a length of 40mm is obtained; The conductive solution is composed of graphene and nitrogen-methylpyrrolidone with a mass concentration of 15%. Step 5, after the discharge rod 1 obtained in step 4 is threadedly connected with the mounting base stud 2, a miniaturized electrostatic discharge device with elasticity is obtained.

[0026] like Figure 7 As shown, the discharge current of the elastic miniaturized electrostatic discharge device prepared in this embodiment at a voltage of 40 kV is 15 μA, which means that the elastic miniaturized electrostatic discharge device prepared in this embodiment can meet the discharge performance requirements in a smaller size.

Claims

1. A miniaturized electrostatic discharge device having elasticity, characterized in that: The mounting base comprises an outer cavity (4) of the mounting base, wherein a metal plate (3) is arranged in the outer cavity (4), one end of the metal plate (3) is connected to one end of a mounting base stud (2), the other end of the mounting base stud (2) is arranged outside the outer cavity (4), and the other end of the mounting base stud (2) is connected to a discharge rod (1).

2. The miniaturized electrostatic discharge device with elasticity according to claim 1, characterized in that: The discharge rod (1) comprises a thick rod section (7), one end of the thick rod section (7) is provided with a threaded hole (6), the other end of the thick rod section (7) is connected to a thin rod section (8) via a conical surface (9), and the threaded hole (6) is threadedly connected to a mounting seat stud (2).

3. The miniaturized electrostatic discharge device with elasticity according to claim 2, characterized in that: The thick rod segment (7), the thin rod segment (8) and the side walls of the tapered surface (9) are all coated with a conductive layer.

4. The miniaturized electrostatic discharge device with elasticity according to claim 2, characterized in that: An even number of flat surfaces (5) are arranged on the side wall of the thick rod section (7) at equal intervals along its circumference.

5. A method for preparing a miniaturized electrostatic discharge device with elasticity, characterized in that: Follow the steps below to implement it: Step 1, machining the metal plate (3) and the mounting seat stud (2) according to the design drawing; Step 2, using glass fiber prepreg to wrap the metal plate (3) to prepare the outer cavity (4) of the mounting seat; Step 3, using polyimide to prepare a discharge rod (1) semi-finished product; Step 4, spraying an electrostatic conductive solution on the surface of the semi-finished discharge rod (1) obtained in step 3 to form a conductive layer, thereby obtaining a discharge rod (1); Step 5, threading the discharge rod (1) obtained in step 4 with the mounting base stud (2) to obtain a miniaturized electrostatic discharge device with elasticity.

6. The method for preparing a miniaturized electrostatic discharge device with elasticity according to claim 5, characterized in that: The specific process of step 2 is: Step 2.1, laying 2 to 10 layers of glass fiber prepreg on the upper and lower surfaces of the metal plate (3) obtained in step 1, respectively, and laying adhesive film between two adjacent layers of glass fiber prepreg and between the glass fiber prepreg and the metal plate (3); Step 2.2, placing the metal plate (3) laid in step 2.1 into a mold for mold closing, and then curing to obtain an outer cavity (4) of the mounting seat.

7. The method for preparing a miniaturized electrostatic discharge device with elasticity according to claim 6, characterized in that: In step 2.2, the mold comprises an upper mold (10) and a lower mold (11), a cavity (12) is arranged on the contacting surfaces of the upper mold (10) and the lower mold (11), a through hole is arranged on the upper mold (10), and a blind hole is arranged on the lower mold (11), the through hole and the blind hole correspond to each other and constitute an edge reserved hole (13), and a paved metal plate (3) is arranged in the cavity (12); The curing process is as follows: heating rate is 1℃ / min-10℃ / min, heating to 100℃-300℃, keeping warm for 180min, cooling to no higher than 25℃ at a rate of ≤2℃ / min and taking out of the oven.

8. The method for preparing a miniaturized electrostatic discharge device with elasticity according to claim 5, characterized in that: The step 3 specifically involves using polyimide to perform mechanical processing or injection molding according to the drawings to obtain a semi-finished discharge rod (1).

9. The method for preparing a miniaturized electrostatic discharge device with elasticity according to claim 8, characterized in that: The injection molding process is as follows: injection molding temperature is 280℃~300℃, injection molding time is 2s~5s, and injection molding pressure is 100MPa~150MPa.

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