Shielding grounding spring and shielding connector

Abstract

The invention relates to a connector, in particular to a shielding grounding spring and a shielding connector, the shielding connector comprises a shell, a contact piece is arranged in the shell, an insulator, an insulating pressing plate and an interface wire sealing body are sequentially penetrated through by the contact piece from front to back, the shielding grounding spring is arranged between the insulating pressing plate and the interface wire sealing body, and the contact piece penetrates through the shielding grounding spring. The grounding spring claw is in elastic contact conduction with the inner wall of the shell; the shielding grounding spring comprises a grounding spring body, a plurality of holes are distributed on the grounding spring body, a plurality of elastic grounding spring claws are arranged on the outer circumference of the grounding spring body, the plurality of grounding spring claws are divided into two grounding spring claw groups, and the grounding spring claws of the two grounding spring claw groups respectively extend towards different sides of the grounding spring body in the thickness direction. The grounding spring claws at the two sides of the shielding grounding spring are electrically overlapped with the inner wall of the shell, so that twice shielding is realized at the gap between the shielding grounding spring and the inner wall of the shell, and the shielding effect is better.

Description

Technical Field

[0001] This invention relates to a connector, specifically to a shielded grounding spring and a shielded connector. Background Technology

[0002] Conventional shielded connectors fill their internal cavity with insulating material. However, this internal cavity acts as a path for electromagnetic interference (EMI) propagation, resulting in poor EMI immunity. Adding shielding to the connector cavity necessitates redesigning some internal components, significantly increasing costs. Furthermore, existing shielding structures are prone to misalignment, affecting the EMI leakage path and causing unstable contact between the shielding structure and the housing, leading to inconsistent shielding effectiveness. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a shielded grounding spring and a shielded connector.

[0004] The objective of this invention is achieved through the following technical solution. A shielded grounding spring according to this invention includes a grounding spring body with several holes distributed on the grounding spring body for corresponding contacts to pass through. The outer periphery of the grounding spring body is provided with several elastic grounding spring claws, which are divided into two grounding spring claw groups. The grounding spring claws of the two grounding spring claw groups extend towards different sides in the thickness direction of the grounding spring body.

[0005] Compared with the prior art, the advantages of the present invention are: The shielded grounding spring of the present invention can be directly assembled on the basis of the existing shielded connector without changing any original structure and parts, without redesigning components, and only requires adding one part, which greatly reduces costs.

[0006] After the shielded grounding spring is installed inside the shielded connector, the grounding spring claw of the shielded grounding spring makes elastic contact with the inner wall of the metal housing, ensuring good contact between the grounding spring claw and the inner wall of the housing.

[0007] The shielding grounding spring forms two action point loops distributed front and back at all contact points with the shell. The two action point loops are symmetrically arranged on both sides of the shielding grounding spring. The force between the two action point loops and the inner wall of the shell acts symmetrically on both sides of the shielding grounding spring. For the shielding grounding spring, the forces on both sides cancel each other out. That is, the resultant force formed by the force generated by the inner wall of the shell on the grounding spring claws on both sides can prevent the shielding grounding spring from shaking and tilting, thus making the shielding grounding spring securely fixed.

[0008] After the shielding grounding spring is installed inside the connector, the grounding spring claws on both sides of the shielding grounding spring make electrical contact with the inner wall of the housing. In this way, double shielding is achieved in the gap between the shielding grounding spring and the inner wall of the housing, resulting in better contact and conduction and better shielding effect.

[0009] Furthermore, the convex surface of the grounding spring claw faces outward from the axis of the grounding spring body.

[0010] Furthermore, the grounding spring claw is S-shaped or arc-shaped.

[0011] Furthermore, the grounding spring body is in the shape of a disc, and adjacent grounding spring claws extend toward different sides of the grounding spring body in the circumferential direction.

[0012] Furthermore, the outer circumference of the grounding spring body is provided with a groove for engaging with a protruding key on the inner wall of the housing to prevent rotation.

[0013] Compared with the prior art, the advantages of the present invention are: The slot and the key engage to prevent the shielding grounding spring from rotating.

[0014] A shielded connector includes a housing, within which a contact is disposed and an insulator, an insulating pressure plate, and an interface sealing body are passed through sequentially from front to back by the contact. A shielding grounding spring is disposed between the insulating pressure plate and the interface sealing body. The contact passes through the shielding grounding spring, and the grounding spring claw makes elastic contact with the inner wall of the housing for conduction.

[0015] Furthermore, the protruding key on the inner wall of the housing is nested in the slot on the grounding spring body.

[0016] Furthermore, the diameter of the hole is larger than the diameter of the through hole through which the contact on the insulating pressure plate passes.

[0017] Compared with the prior art, the advantages of the present invention are: The contact is confined within the through hole of the insulating pressure plate, thereby ensuring sufficient insulation clearance with the shielding grounding spring.

[0018] Furthermore, the bottom side wall of the insertion cavity at the front end of the housing is provided with an annular groove, and a rubber ring protruding from the annular groove is nested inside the annular groove.

[0019] Compared with the prior art, the advantages of the present invention are: When the adapter connector and the shield connector are mated, the mating end face of the adapter connector abuts against the rubber ring, achieving a seal between the mating interfaces of the shield connector and the adapter connector.

[0020] Furthermore, an interface seal is provided at the bottom of the insertion cavity at the front end of the housing. The interface seal is attached to the front end surface of the insulator, and the contact passes through the interface seal.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the purpose, features and advantages of the present invention more obvious and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a partial cross-sectional view of an embodiment of a shielded connector according to the present invention; Figure 2 for Figure 1 A three-dimensional schematic diagram of the shielded grounding spring; Figure 3 for Figure 1 A three-dimensional schematic diagram of the shielded grounding spring from another perspective; Figure 4 for Figure 1 Front view of the shielded grounding spring; Figure 5 for Figure 1 Side view of the shielded grounding spring; Figure 6 for Figure 1 Enlarged diagram of point A in the middle.

[0023] Figure label: 1-Shell, 11-Merging cavity, 12-Stop step I, 13-Annular groove; 2-Contact element, 21-Fixing boss; 3-Rubber ring; 4-Interface sealing body; 5-Insulator, 51-Insertion hole, 52-Stop step II; 6-Insulating pressure plate, 61-Protrusion; 7-Shielding grounding spring, 71-Hole, 72-Grounding spring claw, 73-Grounding spring body, 74-Slot, 75-Convex surface, 76-Axis axis; 8-Interface sealing body; 9-Elastic chuck. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] An embodiment of a shielded connector according to the present invention, such as... Figures 1 to 6As shown. The shielded connector includes a housing 1, a contact 2, a rubber ring 3, an interface seal 4, an insulator 5, an insulating pressure plate 6, a shielding grounding spring 7, and an interface sealing wire 8.

[0026] The housing 1 is a metal housing, and the inner cavity at the front end of the housing 1 is a mating cavity 11, which is used to accommodate the mating end of the adapter connector of the shielded connector. The bottom side wall of the mating cavity 11 has an annular groove 13 for nesting the rubber ring 3. The rubber ring 3 protrudes from the annular groove 13, and one side of it abuts against the bottom surface of the mating cavity 11. When the adapter connector and the shielded connector are mated, the mating end face of the adapter connector abuts against the rubber ring 3, thereby achieving a seal between the mating interfaces of the shielded connector and the adapter connector.

[0027] The inner wall of the housing 1 located behind the insertion cavity 11 is provided with a stop step I 12, and the step on the outer wall of the insulator 5 stops forward on the stop step I 12. The insulator 5 is provided with a plurality of insertion holes 51 for inserting the contact 2. The inner wall of the insertion hole 51 is provided with a stop step II 52, and the outer wall of the contact 2 is provided with a fixing boss 21. The front end of the fixing boss 21 stops forward on the stop step II 52.

[0028] The contact 2 extends forward through the insulator 5, and an interface seal 4 is fitted at the root of the protruding part of the contact 2. The interface seal 4 is tightly attached to the front end face of the insulator 5 and is limited on the insulator 5. The interface seal 4 has through holes corresponding to the insertion holes 51 on the insulator 5. Each contact 2 passes through the corresponding through hole on the interface seal 4 and extends into the mating cavity 11.

[0029] An insulating pressure plate 6 is provided on the rear side of the insulator 5. Through holes corresponding to the insertion holes 51 are distributed on the insulating pressure plate 6. Multiple protrusions 61 are distributed on the front end face of the insulating pressure plate 6, with each protrusion 61 corresponding to a through hole on the insulating pressure plate 6, allowing the through hole to pass through the corresponding protrusion 61. The contact 2 passes through the through hole on the insulating pressure plate 6. The protrusion 61 can be inserted into the corresponding insertion hole 51. An elastic claw 9 is inserted into the insertion hole 51, and the contact 2 passes through the elastic claw 9. The claw fingers at the front end of the elastic claw 9 abut against the rear end face of the fixing boss 21, and the protrusion 61 abuts against the rear end of the elastic claw 9, thereby fixing the contact 2 within the insulator 5.

[0030] A shielding grounding spring 7 is attached to the rear end face of the insulating pressure plate 6. The shielding grounding spring 7 is made of metal and includes a grounding spring body 73. The grounding spring body 73 is in the shape of a disc with multiple holes 71 distributed on it. The holes 71 correspond one-to-one with the contact 2 and are perfectly matched with the connector node arrangement. The contact 2 passes through the hole 71, and the diameter of the hole 71 is larger than the diameter of the contact 2 to prevent the contact 2 from contacting the shielding grounding spring 7.

[0031] The grounding spring body 73 has a slot 74 on its circumference. Correspondingly, the inner wall of the housing 1 has a protruding key. The slot 74 cooperates with the protruding key to prevent the grounding spring 7 from rotating.

[0032] Multiple grounding spring claws 72 are distributed on the circumference of the grounding spring body 73. These claws are divided into two groups, with each group extending towards the front and rear sides of the shielding grounding spring 7, facing the front and rear surfaces of the shielding connector. The claws 72 in each of the two groups are spaced apart on the outer circumference of the grounding spring body 73, meaning adjacent claws extend towards the front and rear sides of the shielding grounding spring 7. Each claw 72 is a bent S-shaped sheet structure. The convex surface 75 of the claw extends outward from the axis 76 of the grounding spring body 73 and elastically contacts the inner wall of the housing 1, forming the contact portion that elastically contacts the housing 1.

[0033] The shielded grounding spring 7 is assembled inside the shielded connector. The grounding claw 72 of the shielded grounding spring 7 elastically contacts the inner wall of the metal housing 1, ensuring good contact between the grounding claw 72 and the inner wall of the housing 1. All contact points between the shielded grounding spring 7 and the housing 1 form two front-to-back action point loops, symmetrically arranged on both sides of the shielded grounding spring 7. The forces between the two action point loops and the inner wall of the housing 1 act symmetrically on both sides of the shielded grounding spring 7. For the shielded grounding spring 7, the forces on both sides exactly cancel each other out. That is, the resultant force formed by the forces exerted by the inner wall of the housing 1 on the grounding claws 72 on both sides can prevent the shielded grounding spring 7 from shaking or tilting, thus ensuring a secure fixation. Furthermore, through the contact and engagement between the grounding claw 7 and the inner wall of the housing 1, the shielded grounding spring 7 is not subjected to axial force, preventing movement.

[0034] After the shielding grounding spring 7 is assembled inside the connector, the grounding spring claws 72 on both sides of the shielding grounding spring 7 make electrical contact with the inner wall of the housing. In this way, double shielding is achieved in the gap between the shielding grounding spring 7 and the inner wall of the housing, resulting in better contact and conduction and better shielding effect.

[0035] An interface sealing body 8 is fitted to the rear side of the shielding grounding spring 7. Through holes corresponding to the contact element 2 are distributed on the interface sealing body 8, and the contact element 2 passes through these through holes. The diameter of the hole 71 on the shielding grounding spring 7 is larger than the diameter of the through hole on the front insulating pressure plate 6, and also larger than the diameter of the through hole on the rear interface sealing body 8. The contact element 2 is confined within the through hole of the insulating pressure plate 6, thus ensuring sufficient insulation clearance with the shielding grounding spring 7. The interface sealing body 8 is typically made of silicone rubber, capable of elastic deformation. By placing the shielding grounding spring 7 between the insulating pressure plate 6 and the interface sealing body 8, the interface sealing body 8 undergoes elastic deformation and compression. The internal structural dimensions of the shielded connector do not change due to the increase in the size of the shielding grounding spring 7, avoiding the need for redesigning the shielded connector and increasing costs.

[0036] The shielded grounding spring 7 is assembled directly on the basis of a common connector without the need for any new design of structure or parts. One side of the shielded grounding spring 7 is fitted to the rear end face of the insulating pressure plate 6, and the other side is fitted and fixed by the interface sealing body 8, thereby achieving complete fixation of the shielded grounding spring 7.

[0037] A tail accessory is provided at the tail of the shielded connector. The tail accessory stops at the rear end of the interface sealing body 8 to complete the assembly of the shielded connector.

[0038] The shielding grounding spring 7 is made of a 0.1mm thick metal strip. The shielding grounding spring 7 is thin, and the interface sealing body 8 only needs to provide a small elastic accommodation space, so it will not affect the structural performance.

[0039] This invention designs a shielding grounding spring 7 that matches the nodes of a shielded connector. This shielding grounding spring 7 is installed between the insulating pressure plate 6 and the interface sealing body 8 inside the shielded connector, rather than between the plug housing and the socket housing. This transforms the entire internal cavity of the shielded connector into many small holes, which greatly suppresses electromagnetic interference. Specifically, existing shielded connectors have large holes within their internal cavity, which act as electromagnetic interference leakage paths. The shielding grounding spring 7 of this invention divides these large holes into many smaller holes, thus segmenting the electromagnetic interference leakage paths and reducing electromagnetic leakage.

[0040] The shielded grounding spring 7 of the present invention is molded and can be directly assembled on the basis of the existing shielded connector without changing any original structure and parts, without redesigning parts, only adding one part, which greatly reduces the cost.

[0041] This invention provides an embodiment of a shielded grounding spring, which is the same as the shielded grounding spring in the shielded connector embodiment described above, and will not be described again here.

[0042] In another embodiment of a shielded grounding spring, the shape of the grounding spring claw 72 can be replaced with an arc shape or other shapes, as long as the convex surface 75 of the grounding spring claw 72 faces the inner wall of the housing and makes elastic contact with the inner wall of the housing.

[0043] This invention discloses a shielded connector assembly, comprising the shielded connector and its adapter connector as described in the above-described shielded connector embodiment. The contact 2 in the shielded connector is a pin contact, and the contact in the adapter connector is a socket contact. The mating end of the adapter connector is inserted into the mating cavity 11 of the shielded connector, and the pin contact and socket contact engage to achieve signal transmission. To enhance anti-interference capability, the adapter connector also incorporates the shielding grounding spring 7 as described in the above embodiment. The shielding grounding spring 7 contacts the housing of the adapter connector. After the shielded connector and the adapter connector are mated, the housings of the two connectors are in contact, and the housing of the shielded connector is grounded, thereby achieving overall electromagnetic interference immunity for the shielded connector assembly.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shielded grounding spring, comprising a grounding spring body (73), characterized in that: The grounding spring body (73) has several holes (71) for corresponding contact elements to pass through. The outer periphery of the grounding spring body (73) is provided with several elastic grounding spring claws (72). The several grounding spring claws (72) are divided into two grounding spring claw groups. The grounding spring claws (72) of the two grounding spring claw groups extend to different sides in the thickness direction of the grounding spring body (73).

2. The shielded grounding spring according to claim 1, characterized in that: The convex surface (75) of the grounding spring claw (72) faces outward from the axis (76) away from the grounding spring body (73).

3. A shielded grounding spring according to claim 1, characterized in that: The grounding spring claw (72) is S-shaped or arc-shaped.

4. A shielded grounding spring according to claim 1, characterized in that: The grounding spring body (73) is in the shape of a disc, and the adjacent grounding spring claws (72) in the circumferential direction extend toward different sides of the grounding spring body (73).

5. A shielded grounding spring according to claim 1, characterized in that: The outer circumference of the grounding spring body (73) is provided with a groove (74) for anti-rotation engagement with the protruding key on the inner wall of the housing of the shielded connector.

6. A shielded connector, comprising a housing (1), a contact (2) disposed within the housing (1), and an insulator (5), an insulating pressure plate (6), and an interface sealing body (8) through which the contact (2) passes sequentially from front to back, characterized in that: A shielding grounding spring (7) as described in any one of claims 1-4 is provided between the insulating pressure plate (6) and the interface sealing body (8), the contact (2) passes through the shielding grounding spring (7), and the grounding spring claw (72) makes elastic contact with the inner wall of the housing (1).

7. A shielded connector according to claim 6, characterized in that: The protruding key on the inner wall of the housing (1) is nested in the slot (74) on the grounding spring body (73).

8. A shielded connector according to claim 6, characterized in that: The diameter of the hole (71) is larger than the diameter of the through hole through which the contact (2) on the insulating pressure plate (6) passes.

9. A shielded connector according to claim 6, characterized in that: The bottom side wall of the insertion cavity (11) at the front end of the housing (1) is provided with an annular groove (13), and a rubber ring (3) protruding from the annular groove (13) is nested inside the annular groove (13).

10. A shielded connector according to claim 6, characterized in that: The bottom of the insertion cavity (11) at the front end of the housing (1) is provided with an interface seal (4), which is attached to the front end surface of the insulator (5), and the contact (2) passes through the interface seal (4).

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