Electromagnetic pulse protection connector

Abstract

An electromagnetic pulse protection connector belongs to the field of connectors, including a shell, a contact and a protection component. The protection component is arranged in the shell and is respectively connected to the contact and the shell to discharge the pulse energy to the earth through the shell; the protection component is provided with a through hole for the contact to pass through, and a columnar spring piece sleeved on the contact is provided in the through hole; the main body of the columnar spring piece is divided into a small diameter section, a variable diameter section and a large diameter section connected in sequence from front to back along its axial direction; the small diameter section is provided with a contact arm arranged at intervals through a second axial split groove, the inner wall of the contact arm is a circular arc surface that can contact the elastic surface of the contact, and the outer cylindrical surface of the large diameter section can contact the elastic surface of the inner wall of the through hole of the protection component; the free end of the contact arm is provided with an elastic positioning thorn, the elastic positioning thorn is tilted backward, and the maximum diameter of the elastic positioning thorn is equal to the outer diameter of the large diameter section. The present invention improves the pulse current discharge capacity through the improvement of the columnar spring piece and ensures the electromagnetic pulse protection effect.

Description

Technical Field

[0001] The invention belongs to the field of connectors, and in particular relates to an 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 the contact 1 and the protective component 5 are connected by Figure 2 The spring claw 2 shown in the figure realizes conduction. The spring claw 2 has multiple elastic arms spaced in the circumferential direction, and the elastic arms are arranged obliquely relative to the axis of the spring claw 2, thereby forming a conical structure. After the spring claw 2 is installed on the contact piece 1, the multiple elastic arms will expand radially outward, and the inner side of the free end of the elastic arm will form a contact point 201 with the contact piece 1. Therefore, the spring claw 2 and the contact piece 1 are actually contacted through the contact point 201 of the free end of the elastic arm on the spring claw 2, which is a point contact. When the pulse energy is discharged, it will cause problems such as insufficient flow capacity or high residual pressure due to factors such as large contact resistance. In addition, 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. Summary of the invention

[0004] The purpose of the present invention is to provide an electromagnetic pulse protection connector, which adopts a columnar spring sheet different from the spring claw structure in the prior art to achieve surface contact conduction with the contact piece and the protection component, thereby improving the pulse current discharge capacity and shock resistance, and ensuring the electromagnetic pulse protection effect.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an 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, and the protection component is respectively connected with the contact and the shell to discharge the pulse energy to the ground through the shell; the protection component is provided with a through hole for the contact to pass through, and a columnar spring piece sleeved on the contact is provided in the through hole;

[0006] The main body of the columnar spring piece is divided into a small diameter section, a variable diameter section and a large diameter section which are connected in sequence from front to back along its axial direction; the small diameter section is provided with a contact arm which is arranged at intervals through a second axial split groove, the inner wall of the contact arm is an arc surface which can contact the elastic surface of the contact piece surface, and the outer circular surface of the large diameter section can contact the elastic surface of the inner wall of the through hole of the protective component; 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, 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 can be stably contacted and matched;

[0007] 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.

[0008] The beneficial effects are: the columnar spring piece is in elastic surface contact with both the contact piece and the protective component, and the contact arm can "hold" the contact piece tightly, 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 elastic surface contact with the inner wall of the through hole of the protective component, ensuring sufficient contact area between the columnar spring piece and the protective component, thereby improving the overall conductive contact area and increasing the current carrying capacity. The setting of the elastic positioning thorn can make the inner wall of the through hole of the protective component squeeze the elastic positioning thorn, ensuring that the contact arm can better fit the contact piece, and can avoid the free end of the contact arm from tilting and separating from the contact piece in a vibration scenario, 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.

[0009] There is only one second axial split groove on the columnar spring piece that runs axially, and the other second axial split grooves are only distributed on the small diameter section and the variable diameter section. This design can make the columnar spring piece have the ability to reduce the diameter radially, so as to facilitate the insertion into the through hole of the protective component. In the process of inserting the columnar spring piece into the through hole of the protective component, the conical surface of the outer periphery of the elastic positioning thorn first elastically contacts with the inner wall of the through hole, forcing the elastic positioning thorn to deform under force and transmit the force to the contact arm. Several contact arms will move closer radially, so that the inner wall of the contact arm hugs the surface of the contact piece to achieve surface contact, increase the conductive contact area, and achieve reliable elastic surface contact. After the columnar spring piece is inserted into the through hole of the protective component, the columnar spring piece has the ability to reset, so that the outer cylindrical surface of the large diameter section can fit closely with the inner wall of the through hole, and finally achieve double elastic surface contact.

[0010] Furthermore, a positioning flange protruding radially from the surface of the large diameter section is also provided at the rear end of the large diameter section, and a notch groove is provided on the positioning flange.

[0011] The beneficial effect is that the positioning flange can be arranged to abut against the plane around the through hole of the protective component, which can not only axially position the columnar spring piece, but also further increase the contact area between the columnar spring piece and the protective component, thereby increasing the flow capacity.

[0012] Furthermore, the axial through groove and the notch groove on the positioning flange are aligned and connected.

[0013] The beneficial effect is: the elasticity of the columnar spring piece in the radial direction is further ensured.

[0014] Furthermore, the number of the contact arms is two, three or four.

[0015] The beneficial effect is that users can make selections according to actual conditions, thereby increasing the application scope of the present invention.

[0016] As an option of this solution, a shielding metal plate is also provided in the shell, and the shielding metal plate is located in front of the protective component. The shielding metal plate is provided with a through hole for the contact piece to pass through, and an insulating sleeve mounted on the contact piece is installed in the through hole. An extruded conductive ring is assembled between the outer peripheral surface of the shielding metal plate and the inner wall of the shell.

[0017] 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.

[0018] Furthermore, one end of the insulating sleeve is provided with a plurality of elastic arms at intervals 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 guide slope is provided on the side of the barb opposite to the flange, the other side of the barb opposite to the guide slope 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.

[0019] The beneficial effect is that the first axial split groove is arranged to facilitate the assembly of the insulating sleeve, and the axial position of the insulating sleeve can be limited by the barbs and the flange, and the contact piece can be clamped and straightened. The flange can also cover the plate surface around the rear end through hole of the shielding metal plate, thereby improving the insulation effect between the shielding metal plate and the contact piece.

[0020] Furthermore, the thickness of the flange is consistent with the distance between the shielding metal plate and the protective component.

[0021] 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.

[0022] Furthermore, at least one protrusion is arranged on the inner side of the elastic arm of the insulating sleeve.

[0023] The beneficial effect is that when the elastic arm of the insulating sleeve is in contact with the surface of the contact piece, the convex point can increase the radial force acting on the contact piece, thereby improving the fixing effect.

[0024] Furthermore, when a plurality of protrusions are provided on the elastic arm, the plurality of protrusions are arranged at intervals along the length direction of the elastic arm.

[0025] The beneficial effect is: the fixing effect of the insulating sleeve and the contact piece is further increased.

[0026] Furthermore, potting glue is respectively potted in front of the shielding metal plate and behind the protective component.

[0027] The beneficial effects are: the potting glue can improve the fixing effect of the shielding metal plate and the protective components, and the barbs 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 barbs can cover the board surface around the through hole at the front end of the shielding metal plate, thereby improving the insulation effect between the shielding metal plate and the contact.

[0028] The beneficial effects of the present invention are as follows: the present invention realizes surface contact conduction between the contact piece and the protective component by adopting a columnar spring piece different from the spring claw, thereby improving the pulse current discharge capability and enhancing the anti-vibration capability of the connector, and is particularly suitable for use under vibration conditions.

[0029] The present invention also 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] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the electromagnetic pulse protection principle in the prior art;

[0032] Figure 2 for Figure 1 Schematic diagram of the structure of the middle spring claw;

[0033] Figure 3 This is a schematic diagram of the structure of the shielded electromagnetic pulse protection connector described in Example 1;

[0034] Figure 4 for Figure 3 A partial enlarged view of the

[0035] Figure 5 It is a side view of the columnar spring piece described in Example 1;

[0036] Figure 6 is a three-dimensional view of the columnar spring sheet described in Example 1;

[0037] Figure 7 is a three-dimensional view of the insulating sleeve described in Example 2;

[0038] Figure 8 is a side view of the insulating sleeve described in Example 2;

[0039] Fig. 9 is a side view of the insulating sleeve described in Example 3;

[0040] Fig.10 is a side view of the insulating sleeve described in Example 4;

[0041] Fig.11 is a three-dimensional view of the insulating sleeve 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: Figure 3 As shown, an electromagnetic pulse protection connector includes a contact 1, a spring 3, a housing 4, a protection component 5, an interface seal 6, a rubber ring 7, an insulator 8, a conductive ring 9, a numbering plate 12 and a columnar spring 14. 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 housing 4 also has the protection component 5, the contact 1 passes through the through hole on the protection component 5, and the columnar spring 14 is installed on the contact 1. The columnar spring 14 is located in the through hole of the protection component 5 and is used to conduct the contact 1 and the protection component 5. The spring 3 is also provided between the outer cylindrical surface of the protection component 5 and the inner wall of the housing 4, and the protection component 5 and the housing 4 are conducted through the spring 3. The front and rear sides of the protection component 5 are also potted with potting glue 13 to fix the protection component 5.

[0046] like Figure 4 As shown, 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 .

[0047] The structure of the columnar spring piece 14 is as follows Figure 5 , 6 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 extending radially and protruding from the surface of the large diameter section C.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Preferably, the free end of each contact arm 1401 is provided with an elastic positioning thorn 1405, and the elastic positioning thorn 1405 is inclined toward the rear end relative to the contact arm 1401, which does not affect the installation of the columnar spring piece 14, and the apex of the elastic positioning thorn 1405 can elastically contact the inner wall of the through hole on the protective component 5, so that the pressure of the inner wall of the through hole on the inclined elastic positioning thorn 1405 can be obliquely transmitted to the small diameter section A along the elastic positioning thorn 1405. During the inclined transmission process, after the pressure is decomposed, the radial component of force presses the contact arm 1401 on the contact piece 1, and the axial component of force will play a role in stretching the contact arm 1401 forward, thereby strengthening the fit between the contact arm 1401 and the contact piece 1 and preventing the free end of the contact arm 1401 from tilting.

[0053] Furthermore, 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 apex 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 that the pressure distribution is more uniform.

[0054] After the columnar spring piece 14 is used on the electromagnetic pulse protection connector, the contact arm 1401 and the contact piece 1 are in surface contact, which has a larger contact area than the point contact of the spring claw 2 in the prior art, and can improve the pulse current discharge capacity; and, by "holding" the contact piece 1 with multiple contact arms 1401, the shock resistance can be effectively improved, and the columnar spring piece 14 will not separate from the contact piece 1 under vibration conditions. In order to further ensure that the columnar spring piece 14 can better fit the contact piece 1, the protective component 5 can also 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.

[0055] 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.

[0056] Further analysis of the technical effect of the columnar spring piece 14: 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 shrinkage 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 periphery 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 1 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.

[0057] 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.

[0058] Example 2: Continue to refer to Figure 3 As shown, on the basis of Example 1, this embodiment is further provided with a shielding metal plate 10 between the plug-in ends of the protective component 5 and the housing 4, and a through hole is provided on the shielding metal plate 10 for the contact 1 to pass through, and an insulating sleeve 11 is provided in the through hole of the shielding metal plate 10, and 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, and the conductive ring 9 is an O-ring, which 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, and 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, and ensure the contact effect between the conductive ring 9 and the shielding metal plate 10 and the housing 4, as well as the sealing effect of the conductive ring 9.

[0059] The structure of the insulating sleeve 11 is as follows Figure 7 , 8 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.

[0060] 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.

[0061] Further preferably, the axial 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.

[0062] In this embodiment, the potting glue 13 located in front of the protective component 5 is poured in front of the shielding metal plate 10 to fix the shielding metal plate 10. After the insulating sleeve 11 is assembled on the shielding metal plate 10, the barbs 1101 can be embedded in the potting glue 13 to further improve 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.

[0063] Compared with Example 1, this embodiment further provides a shielding metal plate 10, an insulating sleeve 11 and a conductive ring 9 in the shell 4. 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 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.

[0064] Example 3

[0065] The difference between this embodiment and the second embodiment is that the structure of the insulating sleeve 11 is different. In the second 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: Fig. 9 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 second embodiment.

[0066] Example 4

[0067] The difference between this embodiment and the second embodiment is that the structure of the insulating sleeve 11 is different. In the second 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. Fig.10 , 11 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 in contact with the surface of the contact member 1. The other structural settings of this embodiment are the same as those of embodiment 2.

[0068] 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 .

[0069] 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.

[0070] 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. An 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: The protective component (5) is provided with a through hole for the contact piece (1) to pass through, and a columnar spring piece (14) sleeved on the contact piece (1) is provided in the through hole; The main body of the columnar spring piece (14) is divided into a small diameter section (A), a reduced diameter section (B) and a large diameter section (C) connected in sequence along its axial direction from front to back; the small diameter section (A) is provided with contact arms (1401) spaced apart by second axial split grooves (1404), the inner wall of the contact arm (1401) is an arc surface capable of elastically contacting the surface of the contact piece (1), and the outer cylindrical surface of the large diameter section (C) is capable of elastically contacting the inner wall of the through hole of the protective component (5); 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), 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 piece (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 remaining second axial splitting grooves (1404) are only distributed on the small diameter section (A) and the reduced diameter section (B).

2. The electromagnetic pulse protection connector according to claim 1, characterized in that: 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), and the positioning flange (1403) is provided with a notch groove (1406).

3. The electromagnetic pulse protection connector according to claim 2, characterized in that: The axial through groove and the notch groove (1406) on the positioning flange (1403) are aligned and connected.

4. The electromagnetic pulse protection connector according to claim 1, characterized in that: The number of the contact arms (1401) is two, three or four.

5. The electromagnetic pulse protection connector according to claim 1, 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. An insulating sleeve (11) sleeved on the contact piece (1) is installed in the through hole. 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).

6. The electromagnetic pulse protection connector according to claim 5, characterized in that: One end of the insulating sleeve (11) is provided with a plurality of elastic arms (1102) spaced apart in a 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 guiding inclined surface is provided on the side of the barb (1101) opposite to the flange (1103); the other side of the barb (1101) opposite to the guiding inclined surface 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.

7. The electromagnetic pulse protection connector according to claim 6, 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).

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

9. The electromagnetic pulse protection connector according to claim 8, characterized in that: When a plurality of protrusions (1105) are provided on the elastic arm (1102), the plurality of protrusions (1105) are arranged at intervals along the length direction of the elastic arm (1102).

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

Images