Grounding contact and connector using same

Abstract

The utility model relates to a grounding contact element and a connector using the grounding contact element, the grounding contact element is arranged in a connector shell, the shell is provided with a mounting hole of the grounding contact element, and a flange plate of the grounding contact element is in interference fit with the mounting hole to realize conduction between the grounding contact element and the connector shell. According to the utility model, the conduction between the grounding contact element and the shell is realized through a mechanical matching structure, the assembly difficulty can be reduced, the operation is simple, the reliability is high, and the grounding contact element is particularly suitable for a micro-size connector.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connectors, and particularly relates to a grounding contact and a connector using the grounding contact. Background Art

[0002] In pulse high-voltage equipment, a self-shorting high-voltage-resistant connector is required. Such a connector generally has three contacts, which are respectively connected to the positive electrode, negative electrode and ground of the pulse high-voltage power supply. Among them, the grounding contact needs to be conducted to the connector housing. The current technical solution generally realizes the conduction and fixation between the contact and the housing through soldering between the contact and the mounting hole after the grounding contact is installed, as Figure 1 shown. The current conduction method is feasible for connectors with larger size spaces, but there are the following defects for micro-rectangular connectors with smaller size spaces:

[0003] 1. The soldering operation space is small and soldering is difficult;

[0004] 2. The soldering process is a special process, and there are process risks such as false soldering and missed soldering;

[0005] 3. The tinning amount is limited, and there is a risk of solder joint detachment under strong mechanical environmental conditions.

[0006] If the risks existing in the above defects occur, they will cause the grounding failure of the contact and affect the use safety. Summary of the Utility Model

[0007] Aiming at the defects of the prior art, the utility model provides a grounding contact and a connector using the grounding contact. The grounding contact realizes grounding conduction through a reliable mechanical connection, and the assembly is simple and the reliability is high.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A connector includes a housing. A contact assembly is arranged in the housing. The contact assembly includes a power contact and a grounding contact. An installation hole for installing the grounding contact is arranged in the housing. A flange is arranged on the grounding contact. The grounding contact and the housing are conducted through interference fit between the flange and the installation hole.

[0010] Further, a fitting structure is arranged on one of the outer peripheral surface of the flange of the grounding contact and the inner peripheral surface of the installation hole in interference fit therewith. The interference fit between the flange of the grounding contact and the connector housing is realized through the fitting structure.

[0011] Further, the fitting structure is knurling.

[0012] Further, the knurling is straight knurling, diagonal knurling or reticulate knurling.

[0013] Further, the fitting structure is interference bumps, interference convex hulls or interference ribs.

[0014] Further, the material hardness of the grounding contact is higher than that of the housing.

[0015] Further, the grounding contact and the housing are made of copper alloys with different hardnesses.

[0016] Further, an insulator is installed in the housing, and the power contact is installed in the housing through the insulator, keeping insulated from the housing.

[0017] Further, avoidance holes are provided at positions corresponding to the mounting holes on the insulator, and the grounding contact does not contact the insulator.

[0018] Further, a rib plate is connected between the two side walls of the housing, and the mounting hole is provided on the rib plate.

[0019] Further, the mounting hole is a stepped hole, and an interference fit is provided between the large hole of the stepped hole and the flange of the grounding contact.

[0020] Further, the contact component is a jack contact or a pin contact.

[0021] A grounding contact, on which a flange is provided, and an engaging structure is provided on the outer peripheral surface of the flange of the grounding contact. The engaging structure is used for interference fit with the mounting hole on the connector housing to realize the conduction between the grounding contact and the connector housing.

[0022] Further, the engaging structure is knurling.

[0023] Further, the knurling is straight knurling, diagonal knurling or reticulate knurling.

[0024] Further, the fitting structure is interference bumps, interference convex hulls or interference ribs.

[0025] The grounding contact of the present utility model and the connector housing are conducted through an interference fit mechanical structure to realize the self-shorting between the grounding contact and the connector housing. The beneficial effects that can be achieved include:

[0026] 1. It is not limited by the assembly space, suitable for assembly in a small operation space, and the assembly process is simple;

[0027] 2. There is no special process in the assembly process, and there is no process risk;

[0028] 3. Compared with the traditional soldering method, the fitting strength is high, not easy to fall off, and has excellent reliability. Description of the Drawings

[0029] Figure 1 Schematic diagram of a prior art connector;

[0030] Figure 2 Schematic diagram of the connector of the present utility model;

[0031] Figure 3 Schematic diagram of the parts of the housing of the present utility model;

[0032] Figure 4 Schematic diagram of the parts of the grounding jack of the present utility model;

[0033] Figure 5 Three-dimensional assembly schematic diagram of the housing and the grounding jack of the present utility model;

[0034] Reference Numerals:

[0035] 1 - Housing; 2 - Insulator; 3 - Positive jack; 4 - Grounding jack; 5 - Negative jack; 6 - Solder; 7 - Flange; 8 - Mounting hole; 9 - Knurling; 10 - Rib plate. Detailed Description of the Preferred Embodiments

[0036] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0037] As Figure 2-5 shown, an embodiment of a connector: In this embodiment, the connector is a self - short - circuit and high - voltage resistant micro - rectangular connector, including a housing 1. A contact member assembly is provided inside the housing 1. The contact member assembly includes a positive jack 3, a negative jack 5, and a grounding jack 4. The positive jack 3 and the negative jack 5 are installed inside the housing 1 through an insulator 2 and are insulated from the housing 1. Mounting holes 8 for the grounding jack 4 are provided inside the housing 1. A flange 7 is provided on the grounding jack 4. The flange 7 and the mounting hole 8 are in interference fit to achieve electrical connection between the grounding jack 4 and the housing 1.

[0038] A rib plate 10 is connected between the two side walls of the housing 1. The mounting hole 8 is provided on the rib plate 10. The mounting hole 8 is a stepped hole. The large hole of the stepped hole is in interference fit with the flange 7 of the grounding jack 4, and the small hole of the stepped hole is in clearance fit with the outer diameter of the grounding jack 4.

[0039] Specifically, the outer surface of the flange 7 of the grounding jack 4 is machined with a knurling 9 structure along the circumferential direction. The knurling 9 structure and the hole wall of the mounting hole 8 are in interference fit to reduce the assembly difficulty of the interference fit. The knurling 9 can be straight knurling, oblique knurling, or reticulate knurling, preferably straight knurling.

[0040] In a specific embodiment, the material hardness of the grounding jack 4 is higher than that of the housing 1. The materials of the grounding jack 4 and the housing 1 are copper alloys with different hardnesses. The material of the grounding jack 4 is a copper alloy with a relatively hard hardness, and the material of the housing 1 is a copper alloy with a slightly softer hardness. A good assembly and fitting structure is achieved between the two through a reasonable size design.

[0041] In Figure 2-5 In the shown connector, the contact member assemblies are arranged at intervals in a single row within the housing 1. The grounding jack 4 is arranged between the positive jack 3 and the negative jack 5. An avoidance hole is provided at the position of the mounting hole 8 on the insulator 2, and the grounding jack 4 does not contact the insulator 2.

[0042] A positioning step is provided at the position corresponding to the insulator 2 in the inner cavity of the housing 1. The rib plate 10 in the housing 1 is flush with the height of the positioning step of the insulator 2 in the housing 1 to ensure that the installation heights of the positive jack 3, the negative jack 5, and the grounding jack 4 are the same.

[0043] The interference fit mechanical connection method adopted by the present utility model can not only ensure the effective conduction between the grounding jack and the housing, but also ensure the connection strength. Compared with the traditional soldering method, the present utility model still has high reliability in a strong mechanical environment, is particularly suitable for the field of micro-sized connectors, has no special process requirements, is simple to assemble, is not limited by space, and has a stable and reliable connection.

[0044] In this embodiment, the contact member for transmitting power in the connector is a jack contact member, and the grounding contact member is a grounding jack; in other embodiments, the positive jack 3 and the negative jack 5 can also adopt pin contact members, and the grounding jack adopts a grounding pin.

[0045] In this embodiment, the technical solution for realizing the interference fit between the grounding jack and the housing is to machine knurling on the outer peripheral surface of the flange; in other embodiments, interference bumps, interference bosses, interference ribs, etc. can also be provided on the outer peripheral surface of the flange; or in another embodiment, the knurling can be arranged on the inner peripheral surface of the large hole of the stepped hole, and at this time, the outer peripheral surface of the flange does not need to be provided with knurling; or, interference fitting structures such as interference bumps, interference bosses, interference ribs, etc. are arranged on the inner peripheral surface of the large hole of the stepped hole, and the outer peripheral surface of the flange does not need to be provided with an interference fitting structure.

[0046] Embodiment of the grounding contact member: The grounding contact member in this embodiment is the grounding contact member described in the above connector embodiment, which will not be elaborated here.

[0047] The above are only the preferred embodiments of the present utility model, and do not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A connector, comprising a housing (1), wherein a contact assembly is arranged in the housing (1), wherein the contact assembly comprises a power contact and a ground contact, wherein: A mounting hole (8) for mounting a grounding contact piece is provided in the housing (1); a flange (7) is provided on the grounding contact piece; and an interference fit between the flange (7) and the mounting hole (8) enables conduction between the grounding contact piece and the housing (1).

2. A connector according to claim 1, characterized in that: An interlocking structure is provided on one of the outer circumferential surface of the flange (7) of the grounding contact piece and the inner circumferential surface of the mounting hole which is interference-fitted therewith, and an interference fit between the flange (7) of the grounding contact piece and the connector housing (1) is achieved through the interlocking structure.

3. A connector according to claim 2, characterized in that: The interlocking structure is a knurling (9).

4. A connector according to claim 3, characterized in that: The knurling (9) is a straight knurling, a diagonal knurling or a mesh knurling.

5. A connector according to claim 2, characterized in that: The interlocking structure is an interference convex point, an interference convex hull or an interference convex strip.

6. A connector according to claim 1, characterized in that: The material hardness of the grounding contact piece is higher than the material hardness of the housing (1).

7. A connector according to claim 6, characterized in that: The materials of the grounding contact piece and the housing (1) are copper alloys with different hardnesses.

8. A connector according to claim 1, characterized in that: An insulator (2) is installed in the housing (1), and the power contact piece is installed in the housing (1) through the insulator (2) and is insulated from the housing (1).

9. A connector according to claim 8, characterized in that: An avoidance hole is provided on the insulator (2) at a position corresponding to the mounting hole (8), and the grounding contact piece does not contact the insulator (2).

10. The connector according to claim 1, characterized in that: A rib plate (10) is connected between the two side walls of the shell (1), and the mounting hole (8) is arranged on the rib plate (10).

11. A connector according to claim 10, characterized in that: The mounting hole (8) is a stepped hole, and an interference fit is formed between the large hole of the stepped hole and the flange (7) of the grounding contact piece.

12. A connector according to claim 1, characterized in that: The contact component is a socket contact or a pin contact.

13. A grounding contact, the grounding contact being provided with a flange (7), characterized in that: An interlocking structure is provided on the outer peripheral surface of the flange plate (7) of the grounding contact piece, and the interlocking structure is used to be interference-fitted with the mounting hole on the connector housing (1) to achieve conduction between the grounding contact piece and the connector housing (1).

14. A ground contact according to claim 13, characterized in that: The interlocking structure is a knurling (9).

15. A ground contact according to claim 14, characterized in that: The knurling (9) is a straight knurling, a diagonal knurling or a mesh knurling.

16. A ground contact according to claim 13, characterized in that: The interlocking structure is an interference convex point, an interference convex hull or an interference convex strip.

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