A shielded electromagnetic pulse protection connector

Abstract

The present invention relates to a shielded electromagnetic pulse protection connector, which belongs to the field of connectors, including a shell, a contact and a protective component. A shielding metal plate located in front of the protective component is provided in the shell, a through hole is provided on the shielding metal plate for the contact to pass through, an insulating sleeve is installed in the through hole, and a conductive ring is assembled between the outer peripheral surface of the shielding metal plate and the shell; one end of the insulating sleeve is provided with a plurality of elastic arms spaced along the circumferential direction through a first axial split groove, a radially protruding barb is provided on the outer side of the free end of the elastic arm, and a flange is provided at the other end of the insulating sleeve; a guiding bevel is provided on the side of the barb opposite to the flange, and the other side opposite to the guiding bevel is used as a front end stop surface, and a side of the flange facing the barb is a rear end stop surface; after the insulating sleeve is assembled in place, the front end stop surface and the rear end stop surface are respectively matched with the front end surface and the rear end surface stop of the shielding metal plate. The present invention can realize full shielding protection inside the connector and eliminate the influence of electromagnetic pulse coupling in the internal space of the connector on the equipment.

Description

Technical Field

[0001] The invention belongs to the field of connectors, and in particular relates to a shielded electromagnetic pulse protection connector. Background Art

[0002] At present, the electromagnetic pulse protection (common electromagnetic interference, electrostatic electromagnetic pulse, lightning electromagnetic pulse, nuclear electromagnetic pulse, etc.) of device port connectors mainly focuses on backdoor coupling, that is, by installing various protection components (capacitors, inductors, varistors, diodes, etc.) inside the connector, the pulse energy is discharged to the ground through the shell. Specifically, Figure 1 As shown, the contact 1 and the protective component 5 are connected via the spring claw 2, and the protective component 5 is then connected to the housing 4 via the spring leaf 3, so that the pulse energy can be discharged to the ground through the housing 4.

[0003] Since there are a large number of non-metallic parts inside the connector, it is impossible to effectively shield electromagnetic pulses, causing part of the electromagnetic pulse energy to enter the device in a spatially coupled manner, thereby causing adverse effects on the inside of the device. Summary of the invention

[0004] The purpose of the present invention is to provide a shielded electromagnetic pulse protection connector, which reduces the influence of spatial coupling on equipment through the internal gap of the connector by adding a shielding metal plate inside the connector.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a shielded electromagnetic pulse protection connector, comprising a shell, a contact and a protection component, wherein the protection component is arranged in the shell, the contact passes through the protection component, the protection component is respectively connected with the contact and the shell to discharge the pulse energy to the ground through the shell, a shielding metal plate is also arranged in the shell, the shielding metal plate is located in front of the protection component, a through hole is arranged on the shielding metal plate for the contact to pass through, and an insulating sleeve sleeved on the contact is installed in the through hole, and an extruded conductive ring is assembled between the outer peripheral surface of the shielding metal plate and the inner wall of the shell;

[0006] One end of the insulating sleeve is provided with a plurality of elastic arms at intervals along the circumferential direction through the first axial split groove, and a radially protruding barb is provided on the outer side of the free end of the elastic arm, and a flange is provided at the other end of the insulating sleeve; a guiding inclined surface is provided on the side of the barb opposite to the flange, and the other side of the barb opposite to the guiding inclined surface serves as a front end stop surface, and a side of the flange facing the barb is a rear end stop surface; after the insulating sleeve is assembled in place on the shielding metal plate, the front end stop surface and the rear end stop surface respectively cooperate with the front end surface and rear end surface stop of the shielding metal plate.

[0007] The beneficial effect is: in the present invention, the contact piece is insulated and isolated from the shielding metal plate through the insulating sleeve, and the shielding metal plate is connected to the shell through the conductive ring. The conductive ring also has a sealing effect, thereby reducing the influence of spatial coupling on the rear-end equipment of the connector through the internal gap of the connector, and finally achieving complete shielding and isolation of electromagnetic pulses inside the connector.

[0008] The structure of the insulating sleeve can not only form effective insulation isolation between the contact piece and the shielding metal plate, but also facilitates the assembly of the insulating sleeve due to the setting of the first axial split groove, and can also limit the axial position of the insulating sleeve through the barbs and the flange, and has a clamping and straightening effect on the contact piece.

[0009] In a further solution, the thickness of the flange is consistent with the distance between the shielding metal plate and the protective component.

[0010] The beneficial effect is that after the insulating sleeve is assembled in place on the shielding metal plate, the front and rear end surfaces of the flange respectively abut against the shielding metal plate and the protective components, thereby isolating and positioning the shielding metal plate and the protective components.

[0011] In a further solution, potting glue is respectively potted in front of the shielding metal plate and behind the protective component.

[0012] The beneficial effect is: the barb can be embedded in the potting glue in front of the shielding metal plate, further improving the fixing effect of the insulating sleeve on the shielding metal plate; at the same time, the potting glue and the barb can cover the plate surface around the through hole at the front end of the shielding metal plate, and the flange can cover the plate surface around the through hole at the rear end of the shielding metal plate, thereby improving the insulation effect between the shielding metal plate and the contact piece.

[0013] As an option, four elastic arms are provided on the insulating sleeve.

[0014] The beneficial effect is that the four elastic arms can improve the elasticity of the insulating sleeve and reduce the difficulty of assembly.

[0015] As another option, two elastic arms are provided on the insulating sleeve.

[0016] The beneficial effect is that the two elastic arms improve the processing efficiency of the insulating sleeve while ensuring the basic elasticity of the insulating sleeve.

[0017] In the above solution, at least one protrusion is arranged on the inner side of the elastic arm of the insulating sleeve.

[0018] The beneficial effect is that when the elastic arm of the insulating sleeve is in contact with the surface of the contact piece, the protrusion can increase the radial force acting on the contact piece, thereby improving the fixing effect.

[0019] An elastic contact piece is arranged in the through hole of the protection component, and the elastic contact piece is used to realize conduction between the contact piece and the protection component.

[0020] The beneficial effect is that the elastic contact piece facilitates the conduction between the contact piece and the protective component, which is beneficial to the discharge of pulse energy.

[0021] As an option of the elastic contact piece, the elastic contact piece is a spring claw.

[0022] The beneficial effects are: the spring claw has a simple structure and is easy to obtain.

[0023] As another option of the elastic contact piece, the elastic contact piece is a columnar spring piece, the inner side of the columnar spring piece is in elastic surface contact with the contact piece surface, and the outer side is in elastic surface contact with the inner wall of the through hole of the protective component.

[0024] The beneficial effect is that the columnar spring piece is in elastic surface contact with the contact piece and the protective component, which can increase the conductive contact area and the current carrying capacity.

[0025] Furthermore, the main body of the columnar spring piece is composed of a small diameter section, a variable diameter section and a large diameter section in sequence from front to back along its axial direction, the small diameter end of the variable diameter section is connected to the small diameter section, the large diameter end of the variable diameter section is connected to the large diameter section, and the outer peripheral surface of the large diameter section is used to fit with the inner wall of the through hole of the protective component; the small diameter section is provided with contact arms arranged at intervals through the second axial split groove, the inner wall of the contact arm is an arc surface that can fit and contact with the surface of the contact piece, the free end of the contact arm is provided with an elastic positioning thorn, the elastic positioning thorn is arranged to be tilted backward relative to the contact arm, and the maximum diameter of the elastic positioning thorn is equal to the outer diameter of the large diameter section, and the outer end of the elastic positioning thorn is used to elastically abut against the inner wall of the through hole of the protective component, so that the inner wall of the contact arm and the surface of the contact piece are stably in contact and matched;

[0026] At least two second axial splitting grooves are provided, one of which is an axial through groove extending backward to the large diameter section, and the other second axial splitting grooves are only distributed on the small diameter section and the reduced diameter section;

[0027] The rear end of the large diameter section is also provided with a positioning flange radially protruding from the surface of the large diameter section, the positioning flange is provided with a notch groove, and the axial through groove is aligned and connected with the notch groove on the positioning flange.

[0028] The beneficial effects are: the setting of the contact arm can form a "hold" for the contact piece, ensuring a larger contact area between the small diameter section and the contact piece; the outer cylindrical surface of the large diameter section is in close contact with the inner wall of the through hole of the protective component, which can ensure sufficient contact area between the columnar spring piece and the protective component; the setting of the positioning flange can abut against the plane around the through hole of the protective component, on the one hand, axially positioning the columnar spring piece, on the other hand, further increasing the contact area between the columnar spring piece and the protective component, thereby increasing the flow capacity; the setting of the elastic positioning thorn can enable the inner wall of the through hole of the protective component to squeeze the elastic positioning thorn, thereby avoiding the free end of the contact arm from tilting up and separating from the contact piece under vibration scenarios, and the inner wall of the through hole can act on the elastic positioning thorn and the large diameter section at the same time, so that the pressure distribution acting on the columnar spring piece is more uniform.

[0029] The beneficial effect of the present invention is that the present invention realizes full shielding protection inside the connector by adding a shielding metal plate inside the connector and arranging an insulating sleeve and a conductive ring, thereby eliminating the influence of electromagnetic pulse coupling in the space inside the connector on the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the electromagnetic pulse protection principle in the prior art;

[0031] Figure 2 for Figure 1 Schematic diagram of the structure of the middle spring claw;

[0032] Figure 3 This is a schematic diagram of the structure of the shielded electromagnetic pulse protection connector described in Example 1;

[0033] Figure 4 is a three-dimensional view of the insulating sleeve described in Example 1;

[0034] Figure 5 is a side view of the insulating sleeve described in Example 1;

[0035] Figure 6 is a side view of the insulating sleeve described in Example 2;

[0036] Figure 7 is a side view of the insulating sleeve described in Example 3;

[0037] Figure 8 is a three-dimensional view of the insulating sleeve described in Example 3;

[0038] Fig. 9 This is a schematic diagram of the structure of the shielded electromagnetic pulse protection connector described in Example 4;

[0039] Fig.10 for Fig. 9 A partial enlarged view of the

[0040] Fig.11 It is a side view of the columnar spring piece described in Example 4;

[0041] Fig.12 is a three-dimensional view of the columnar spring sheet described in Example 4;

[0042] Markings in the figure: 1, contact piece, 2, spring claw, 201, contact point, 3, spring leaf, 4, shell, 5, protective component, 6, interface sealing body, 7, rubber ring, 8, insulator, 9, conductive ring, 10, shielding metal plate, 11, insulating sleeve, 1101, barb, 1102, elastic arm, 1103, flange, 1104, first axial split groove, 1105, convex point, 1106, guiding inclined surface, 1107, front end stop surface, 1108, rear end stop surface, 12, numbering plate, 13, potting glue, 14, columnar spring piece, 1401, contact arm, 1402, component contact part, 1403, positioning flange, 1404, second axial split groove, 1405, elastic positioning thorn, 1406, notch groove;

[0043] A: small diameter section; B: variable diameter section; C: large diameter section. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but is not intended to be a basis for any limitation of the invention. The descriptions of "front" and "rear" in the present invention are based on the use state of the connector, that is, the plug-in end of the connector is the "front" and the wiring end of the connector is the "rear".

[0045] Example 1

[0046] See attached Figure 3 As shown, a shielded electromagnetic pulse protection connector includes a contact 1, a spring claw 2, a spring leaf 3, a housing 4, a protection component 5, an interface seal 6, a rubber ring 7, an insulator 8, a conductive ring 9, a shielding metal plate 10, an insulating sleeve 11 and a numbering plate 12. The insulator 8 is arranged in the housing 4, and the contact 1 is installed through the insulator 8. The front end of the contact 1 extends from the plug-in end of the housing 4, and the rear end of the contact 1 extends through the numbering plate 12 at the rear end of the housing 4. The front end of the contact 1 is also provided with an interface seal 6 surrounding the contact 1 and a rubber ring 7 surrounding the interface seal 6, and the outer circle of the rubber ring 7 is in contact with the inner wall of the housing 4. The protective component 5 is also provided in the shell 4. The contact 1 passes through the through hole on the protective component 5, and the spring claw 2 is installed on the contact 1. The spring claw 2 is located in the through hole of the protective component 5 and is used to conduct the contact 1 and the protective component 5. The spring leaf 3 is also provided between the outer cylindrical surface of the protective component 5 and the inner wall of the shell 4, and the conduction between the protective component 5 and the shell 4 is achieved through the spring leaf 3.

[0047] The structure of the spring claw 2 in this embodiment is Figure 2 The spring claws 2 in the prior art shown have the same structure, and both include a multi-petal spring arm that is obliquely arranged. After the spring claw 2 is installed on the contact piece 1, the multi-petal spring arm will expand radially outward, and the inner side of the free end of the spring arm will form a contact point 201 with the contact piece 1. Therefore, the contact between the contact piece 1 and the spring claw 2 is a point contact.

[0048] Furthermore, a shielding metal plate 10 is provided between the plug-in ends of the protection component 5 and the housing 4. The shielding metal plate 10 is provided with a through hole for the contact 1 to pass through. An insulating sleeve 11 is provided in the through hole of the shielding metal plate 10. The insulating sleeve 11 is sleeved on the contact 1 and is in close contact with the contact 1. A conductive ring 9 is provided between the periphery of the shielding metal plate 10 and the housing 4. The conductive ring 9 is an O-ring and has the dual functions of conduction and sealing. The inner wall of the housing 4 is provided with an annular groove for installing the conductive ring 9. The depth of the annular groove is less than the cross-sectional diameter of the conductive ring 9, so that the shielding metal plate 10 can squeeze the conductive ring 9, ensuring the contact effect between the conductive ring 9 and the shielding metal plate 10 and the housing 4 and the sealing effect of the conductive ring 9.

[0049] The structure of the insulating sleeve 11 is as follows Figure 4 , 5 As shown, the structure is cylindrical as a whole, and a plurality of elastic arms 1102 are evenly spaced along the circumferential direction at one end of the insulating sleeve 11, and a first axial split groove 1104 is formed between adjacent elastic arms 1102. A radially protruding barb 1101 is provided on the outer side of the free end of the elastic arm 1102, and a flange 1103 is provided at the other end of the insulating sleeve 11.

[0050] Preferably, a guiding bevel 1106 is provided on the side of the barb 1101 opposite to the flange 1103, and the other side of the barb 1101 opposite to the guiding bevel 1106 serves as a front end stop surface 1107. During the process of installing the insulating sleeve 11 in the through hole of the shielding metal plate 10, the guiding bevel 1106 on the barb 1101 can contact the through hole, and make the multiple elastic arms 1102 radially retract and close together. After the barb 1101 passes through the through hole, the elastic arms 1102 are reset, and the front end stop surface 1107 on the barb 1101 cooperates with the front end plate surface stop of the shielding metal plate 10. The side of the flange 1103 facing the barb 1101 serves as a rear end stop surface 1108. After the insulating sleeve 11 is assembled in place on the shielding metal plate 10, the rear end stop surface 1108 cooperates with the rear end plate surface stop of the shielding metal plate 10. Thus, the barbs 1101 and flange 1103 of the insulating sleeve 11 cooperate with the shielding metal plate 10 stopper from the front and rear directions, achieving axial limitation of the insulating sleeve 11 in the front and rear directions, and further achieving the clamping and straightening effect of the insulating sleeve 11 on the contact 1.

[0051] Further preferably, the thickness of the flange 1103 is consistent with the distance between the shielding metal plate 10 and the protective component 5. After the insulating sleeve 11 is assembled in place on the shielding metal plate 10, the front and rear end faces of the flange 1103 respectively abut against the shielding metal plate 10 and the protective component 5, thereby isolating and positioning the shielding metal plate 10 and the protective component 5.

[0052] In addition, potting glue 13 is respectively potted in front of the shielding metal plate 10 and behind the protective component 5, which plays a role in fixing the shielding metal plate 10 and the protective component 5. After the insulating sleeve 11 is assembled on the shielding metal plate 10, the barbs 1101 can be embedded in the potting glue 13, further improving the fixing effect of the insulating sleeve 11 on the shielding metal plate 10. The potting glue 13 and the barbs 1101 can cover the plate surface around the front through hole of the shielding metal plate 10, and the flange 1103 on the insulating sleeve 11 is in a circular shape, which can cover the plate surface around the rear through hole of the shielding metal plate 10, thereby improving the insulation effect between the shielding metal plate 10 and the contact 1.

[0053] In this embodiment, the contact piece 1 is insulated and isolated from the shielding metal plate 10 through the insulating sleeve 11, and the shielding metal plate 10 is connected to the shell 4 through the conductive ring 9. The conductive ring 9 also has a sealing function, thereby reducing the impact of spatial coupling on the rear-end device of the connector through the internal gap of the connector, and finally achieving complete shielding and isolation of electromagnetic pulses inside the connector.

[0054] Example 2

[0055] The difference between this embodiment and the first embodiment is that the structure of the insulating sleeve 11 is different. In the first embodiment, the insulating sleeve 11 has four elastic arms 1102, thereby forming four first axial split grooves 1104. The structure of the insulating sleeve 11 in this embodiment is as follows: Figure 6 As shown, the insulating sleeve 11 has only two elastic arms 1102 and two first axial split grooves 1104, which can improve the processing efficiency of the insulating sleeve 11. The other structural arrangements of this embodiment are the same as those of the first embodiment.

[0056] Example 3

[0057] The difference between this embodiment and the first embodiment is that the structure of the insulating sleeve 11 is different. In the first embodiment, the inner wall of the elastic arm 1102 on the insulating sleeve 11 is smooth and in close contact with the surface of the contact member 1. Figure 7 , 8 As shown, in this embodiment, the inner wall of the elastic arm 1102 of the insulating sleeve 11 is provided with at least one protrusion 1105, which can increase the radial force on the contact member 1 and the fixing effect on the contact member 1 when it is in contact with the surface of the contact member 1. The other structural settings of this embodiment are the same as those of the first embodiment.

[0058] When a plurality of protrusions 1105 are provided on the elastic arm 1102 , the plurality of protrusions 1105 may be arranged at intervals along the length direction of the elastic arm 1102 , so as to further enhance the fixing effect between the insulating sleeve 11 and the contact member 1 .

[0059] Example 4

[0060] The difference between this embodiment and embodiment 1 is that: in embodiment 1, the contact member 1 and the protection component 5 are connected by Figure 2 The spring claw 2 shown is conductive. In this embodiment, an elastic contact member with another structure is used to replace the spring claw 2 to achieve conductive connection between the contact member 1 and the protective component 5.

[0061] In this embodiment, a columnar spring piece 14 is used to replace the spring claw 2. The columnar spring piece 14 is arranged at a position in the connector as shown in FIG. Figure 9-10 The columnar spring piece 14 is assembled in the through hole of the protection component 5 , with its inner side surface in close contact with the contact piece 1 , and its outer side surface in close contact with the inner wall of the through hole of the protection component 5 .

[0062] The structure of the columnar spring 14 is as follows: Fig.11 , 12 As shown, the main body of the columnar spring piece 14 is composed of a small diameter section A, a variable diameter section B and a large diameter section C from front to back along its axial direction. The small diameter end of the variable diameter section B is connected to the small diameter section A, and the large diameter end of the variable diameter section B is connected to the large diameter section C. The rear end of the large diameter section C is also provided with a positioning flange 1403 radially protruding from the surface of the large diameter section C.

[0063] The small diameter section A has two contact arms 1401 spaced apart circumferentially, and the two contact arms 1401 are separated by two second axial split grooves 1404, one of which extends backward to the large diameter section C and is aligned with the notch groove 1406 on the positioning flange 1403, and the other second axial split groove 1404 is only distributed on the small diameter section A and the variable diameter section B, which further ensures the strength of the columnar spring piece 14 while ensuring that the contact arm 1401 of the columnar spring piece 14 has elasticity.

[0064] The inner wall of the contact arm 1401 is arc-shaped and matches the shape of the surface of the contact piece 1, so the contact arm 1401 can fit on the surface of the contact piece 1 and hold the contact piece 1 tightly, greatly increasing the conductive contact area and the current carrying capacity.

[0065] After the columnar spring piece 14 is assembled, it is located in the through hole of the protective component 5, and the outer cylindrical surface of the large diameter section C is in close contact with the inner wall of the through hole, ensuring that there is sufficient contact area between the columnar spring piece 14 and the protective component 5; the positioning flange 1403 can abut against the plane around the through hole of the protective component 5, on the one hand, axially positioning the columnar spring piece 14, on the other hand, further increasing the contact area between the columnar spring piece 14 and the protective component 5, thereby increasing the flow capacity.

[0066] In addition, the positioning flange 1403 on the columnar spring piece 14 in this embodiment has two notched grooves 1406, and its structure is more reliable and not easy to break, thus solving the problem of the positioning flange 1403 being easy to break during the assembly process of the prior art.

[0067] Preferably, the free end of each contact arm 1401 is provided with an elastic positioning thorn 1405, which is inclined toward the rear end relative to the contact arm 1401, and the maximum diameter of the elastic positioning thorn 1405 is equal to the outer diameter of the large diameter section C, so that the plane P where the vertex of the elastic positioning thorn 1405 is located is tangent to the outer surface of the large diameter section C. In this way, after the columnar spring piece 14 is installed in the through hole of the protective component 5, the inner wall of the through hole can squeeze the large diameter section C and the elastic positioning thorn 1405 at the same time, so as to prevent the free end of the contact arm 1401 from tilting up and ensure the close contact between the contact arm 1401 and the contact piece 1. Moreover, the two ends of the columnar spring piece 14 are squeezed by the protective component 5 at the same time, which can make the pressure distribution more uniform.

[0068] Other structures not described in detail in this embodiment are the same as those in Embodiment 1.

[0069] The advantages of using the columnar spring piece 14 as the elastic contact member in this embodiment over the spring claw 2 are:

[0070] When the spring claw 2 is used, the spring claw 2 and the contact piece 1 are actually in contact through the contact point 201 at the free end of the elastic arm of the spring claw 2. Therefore, it is a point contact. When the pulse energy is discharged, it will cause problems such as insufficient current capacity or high residual pressure due to factors such as large contact resistance. Moreover, in a vibration scenario, the point contact spring claw 2 has poor shock resistance and the spring claw 2 and the contact piece 1 are easily separated.

[0071] After adopting the columnar spring piece 14 described in this embodiment, the contact arm 1401 is in close contact with the contact piece 1, which is a surface contact with a large contact area, and can improve the pulse current discharge capacity; and through multiple contact arms 1401 "holding" the contact piece 1, the shock resistance can be effectively improved, and the columnar spring piece 14 will not be separated from the contact piece 1 under vibration conditions. In order to further ensure that the columnar spring piece 14 can better fit and contact the contact piece 1, the present application can also use the protective component 5 to press the elastic positioning thorn 1405 of the columnar spring piece 14 to prevent the free end of the contact arm 1401 from separating from the contact piece 1 under vibration conditions.

[0072] Therefore, compared with Example 1, the connector described in this embodiment can be used in both vibration environments and non-vibration environments. The connector described in Example 1 is preferably used in a non-vibration environment, and the user can make a choice based on actual conditions.

[0073] In addition, the connector of this embodiment may also adopt the insulating sleeve 11 described in Embodiment 2 or Embodiment 3.

[0074] In other implementations, the number of the contact arms 1401 on the columnar spring piece 14 in this embodiment may also be three or four.

[0075] Further analysis of the technical effect of the columnar spring piece: when the columnar spring piece 14 is provided with two or more second axial split grooves 1404, only one second axial split groove 1404 can be axially penetrated, and the other second axial split grooves 1404 are only provided on the small diameter section A and the reduced diameter section B. Due to such a design, the columnar spring piece 14 can have a radial diameter reduction capability so as to be inserted into the through hole of the protective component 5. During the process of inserting the columnar spring piece 14 into the through hole of the protective component 5: first, the conical surface of the outer peripheral surface of the elastic positioning thorn 1405 is in elastic contact with the inner wall of the through hole, which can guide the columnar spring piece 14 into the through hole, and at the same time, the elastic positioning thorn 1405 is deformed by the inward extrusion force, and the force is transmitted to the contact arm 1401, which is conducive to the radial convergence of several contact arms 1401, that is, a slight diameter reduction occurs at the small diameter section A, and the inner wall of the contact arm 1401 fits with the surface of the contact piece 1 and hugs the contact piece to achieve surface contact between the two, greatly increasing the conductive contact area between the two, and achieving reliable elastic surface contact; after the columnar spring piece 14 is inserted into the through hole of the protective component 5, due to the reset ability of the columnar spring piece 14 itself, the outer peripheral surface of the large diameter section C can fit closely with the inner wall of the through hole to achieve elastic surface contact with the protective component 5. Finally, the columnar spring piece 14 forms a double “surface contact” with the contact piece 1 and the protective component 5, thereby improving the pulse current discharge capability and enhancing the anti-vibration capability of the connector.

[0076] The elastic surface contact between the columnar spring piece 14 and the inner wall of the through hole of the contact piece 1 and the protective component 5 requires that when the columnar spring piece 14 is in a free state (not assembled), the outer diameter of the large diameter section C is slightly larger than the inner diameter of the through hole of the protective component 5, so that the columnar spring piece 14 can maintain reliable elastic surface contact through radial extrusion force after being inserted into the through hole of the protective component 5.

[0077] In the above embodiment, the “conduction” refers to the conduction of electric current, so the spring claw 2, spring leaf 3, conductive ring 9, columnar spring leaf 14 and other structural parts used to achieve conduction are all conductive materials, such as metal.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Those skilled in the art should understand that the specific implementation modes of the present invention may be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A shielded electromagnetic pulse protection connector, comprising a housing (4), a contact (1) and a protection component (5), wherein the protection component (5) is arranged in the housing (4), the contact (1) passes through the protection component (5), and the protection component (5) is respectively connected to the contact (1) and the housing (4) to discharge pulse energy to the ground through the housing (4), characterized in that: A shielding metal plate (10) is also provided in the shell (4), the shielding metal plate (10) is located in front of the protective component (5), a through hole is provided on the shielding metal plate (10) for the contact piece (1) to pass through, and an insulating sleeve (11) sleeved on the contact piece (1) is installed in the through hole, and an extruded conductive ring (9) is installed between the outer peripheral surface of the shielding metal plate (10) and the inner wall of the shell (4); One end of the insulating sleeve (11) is provided with a plurality of elastic arms (1102) spaced apart along the circumferential direction through a first axial split groove (1104); a radially protruding barb (1101) is provided on the outer side of the free end of the elastic arm (1102); and the other end of the insulating sleeve (111) is provided with a flange (1103); a guide slope (1106) is provided on the barb (1101) on the side opposite to the flange (1103); the other side of the barb (1101) opposite to the guide slope (1106) serves as a front end stop surface (1107); and a side of the flange (1103) facing the barb (1101) serves as a rear end stop surface (1108); after the insulating sleeve (11) is assembled in place on the shielding metal plate (10), the front end stop surface (1107) and the rear end stop surface (1108) respectively cooperate with the front end surface and the rear end surface of the shielding metal plate (10) for stopping.

2. The shielded electromagnetic pulse protection connector according to claim 1, characterized in that: The thickness of the flange (1103) is consistent with the distance between the shielding metal plate (10) and the protective component (5).

3. The shielded electromagnetic pulse protection connector according to claim 1, characterized in that: A potting glue (13) is respectively potted in front of the shielding metal plate (10) and behind the protective component (5).

4. The shielded electromagnetic pulse protection connector according to claim 1, characterized in that: Four elastic arms (1102) are provided on the insulating sleeve (11).

5. The shielded electromagnetic pulse protection connector according to claim 1, characterized in that: Two elastic arms (1102) are provided on the insulating sleeve (11).

6. The shielded electromagnetic pulse protection connector according to any one of claims 1 to 5, characterized in that: At least one protrusion (1105) is provided on the inner side of the elastic arm (1102) of the insulating sleeve (11).

7. The shielded electromagnetic pulse protection connector according to claim 1, characterized in that: An elastic contact piece is arranged in the through hole of the protective component (5), and the elastic contact piece is used to achieve conduction between the contact piece (1) and the protective component (5).

8. The shielded electromagnetic pulse protection connector according to claim 7, characterized in that: The elastic contact piece is a spring claw (2).

9. The shielded electromagnetic pulse protection connector according to claim 7, characterized in that: The elastic contact piece is a columnar spring piece (14), the inner side surface of the columnar spring piece (14) is in elastic surface contact with the surface of the contact piece (1), and the outer side surface is in elastic surface contact with the inner wall of the through hole of the protective component (5).

10. The shielded electromagnetic pulse protection connector according to claim 9, characterized in that: The main body of the columnar spring piece (14) is composed of a small diameter section (A), a reduced diameter section (B) and a large diameter section (C) in sequence from front to back along its axial direction. The small diameter end of the reduced diameter section (B) is connected to the small diameter section (A), and the large diameter end of the reduced diameter section (B) is connected to the large diameter section (C). The outer peripheral surface of the large diameter section (C) is used to fit with the inner wall of the through hole of the protective component (5). The small diameter section (A) is provided with contact arms (1401) spaced apart by a second axial split groove (1404). The inner wall of the contact arm (1401) is capable of fitting with the contact element (5). The surface of the contact element (1) is fitted with the arc surface of the contact, the free end of the contact arm (1401) is provided with an elastic positioning thorn (1405), the elastic positioning thorn (1405) is arranged to be tilted backward relative to the contact arm (1401), and the maximum diameter of the elastic positioning thorn (1405) is equal to the outer diameter of the large diameter section (C), and the outer end of the elastic positioning thorn (1405) is used to elastically abut against the inner wall of the through hole of the protective component (5), so that the inner wall of the contact arm (1401) and the surface of the contact element (1) are in stable contact and fit; At least two second axial splitting grooves (1404) are provided, one of which is an axial through groove extending backward to the large diameter section (C), and the other second axial splitting grooves (1404) are only distributed on the small diameter section (A) and the reduced diameter section (B); The rear end of the large diameter section (C) is also provided with a positioning flange (1403) radially protruding from the surface of the large diameter section (C), the positioning flange (1403) is provided with a notch groove (1406), and the axial through groove and the notch groove (1406) on the positioning flange (1403) are aligned and connected.

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