Connector and outer conductor thereof

Abstract

The utility model belongs to the field of electric connectors, and particularly provides a connector and an outer conductor thereof. The front end of the outer conductor is provided with a plugging part used for being inserted into a plugging cavity of an adaptive connector, the plugging part is provided with a contact elastic arm, the periphery of the plugging part is provided with a protruding structure which is located on the rear side of the contact elastic arm and used for making contact with the inner wall of the plugging cavity, and the protruding structure and the contact elastic arm jointly form a fixing structure used for limiting shaking of the outer conductor. The connector comprises the outer conductor. Compared with the prior art that only the contact elastic arm is in contact with the insertion cavity, the convex structure on the outer conductor and the contact elastic arm are jointly matched to form the holding area with a certain axial length, the insertion matching of the outer conductor and the adaptive connector is more stable, and the connector is not easy to yield and abrade when being used in an occasion with stronger vibration, so that the service life of the connector is prolonged, and the service life of the connector is prolonged. And the anti-vibration performance of the connector is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of electrical connectors, and in particular relates to a connector and its outer conductor. Background Technology

[0002] Mini-FAKRA connectors are widely used in vehicle navigation, entertainment, vehicle networking, and intelligent driving modules. A Mini-FAKRA connector includes a shell, an outer conductor, and an inner conductor. For example, the RF coaxial connector disclosed in patent application CN115133351A includes a shielding sleeve (i.e., the outer conductor), an insulator, and an inner conductor, with the insulator located between the shielding sleeve and the inner conductor. The front end of the shielding sleeve is the insertion portion, and the rear end is the cable connection portion. In use, the insertion portion can be inserted into the mating cavity of the adapter connector, and the cable connection portion can connect a cable. Specifically, the insertion portion has multiple circumferentially spaced elastic contact fingers (i.e., contact springs), which contact the inner wall of the mating cavity of the adapter connector during use.

[0003] In the automotive environment, the vibration resistance of connectors is extremely important. The automotive industry recommended standard QC / T1067.1-2017, "Connectors for Automotive Wiring Harnesses and Electrical Equipment - Part 1: Definitions, Test Methods and General Performance Requirements," specifies the test methods and performance requirements for the vibration resistance of automotive connectors. During vibration testing, such as... Figure 1 As shown, the vibration table mounting bracket is equipped with a sleeve 100 (simulating the mating cavity of the adapter connector) into which the insertion portion of the outer conductor 1 of the connector under test can be inserted. The contact spring arm 2 of the insertion portion of the outer conductor 1 of the connector under test elastically contacts the inner wall of the sleeve 100. During the vibration test, since only the contact spring arm 2 of the outer conductor 1 contacts the inner wall of the sleeve 100, the outer conductor 1 will inevitably wobble at a certain angle α (α≥3°). When the amount of wobble is large, it will cause the spring arm 2 to yield and wear, resulting in a huge increase in contact resistance. In severe cases, it will cause momentary disconnection. Therefore, the vibration resistance of existing connectors cannot meet the requirements. Utility Model Content

[0004] The purpose of this invention is to provide an outer conductor for a connector to solve the technical problem of insufficient vibration resistance in existing connectors. Another purpose of this invention is to provide a connector to solve the same technical problem.

[0005] To achieve the above objectives, the technical solution for the outer conductor of the connector provided by this utility model is as follows:

[0006] An outer conductor of a connector has a front end having a plug portion for insertion into a mating cavity of an adapter connector. The plug portion is provided with a contact spring arm, and the outer periphery of the plug portion is provided with a protrusion structure located behind the contact spring arm for contacting the inner wall of the mating cavity. The protrusion structure and the contact spring arm together constitute a retaining structure for limiting the swaying of the outer conductor.

[0007] As a further improvement, the protrusion structure includes two or more protrusions arranged circumferentially along the insertion portion.

[0008] As a further improvement, the contact arm is provided with an external protrusion, and the boss and the external protrusion correspond one-to-one and are directly opposite each other.

[0009] As a further improvement, the raised structure is a ring-shaped raised rib.

[0010] As a further improvement, the front end of the protruding structure is provided with a guide surface for guiding the protruding structure into the mating cavity.

[0011] This utility model is an improved invention, and its beneficial effects are: the outer conductor of this utility model has a protruding structure located on the rear side of the contact spring arm. When it is mated with the adapter connector, both the protruding structure and the contact spring arm can be inserted into the mating cavity, and the two work together to form a holding structure with a certain axial length. In other words, the protruding structure and the contact spring arm work together to play an anti-shake role, thereby improving the vibration resistance of the connector.

[0012] To achieve the above objectives, the technical solution for the connector provided by this utility model is as follows:

[0013] A connector includes an outer conductor, the front end of which has a mating portion for insertion into a mating cavity of an adapter connector. The mating portion is provided with a contact spring arm, and the outer periphery of the mating portion is provided with a protrusion structure located behind the contact spring arm for contacting the inner wall of the mating cavity. The protrusion structure and the contact spring arm together constitute a retaining structure for limiting the swaying of the outer conductor.

[0014] As a further improvement, the protrusion structure includes two or more protrusions arranged circumferentially along the insertion portion.

[0015] As a further improvement, the contact arm is provided with an external protrusion, and the boss and the external protrusion correspond one-to-one and are directly opposite each other.

[0016] As a further improvement, the raised structure is a ring-shaped raised rib.

[0017] As a further improvement, the front end of the protruding structure is provided with a guide surface for guiding the protruding structure into the mating cavity.

[0018] This utility model is an improved invention, and its beneficial effects are as follows: In this utility model, the outer conductor of the connector has an added protrusion structure located on the rear side of the contact spring arm. When mating with the adapter connector, both the protrusion structure and the contact spring arm can be inserted into the mating cavity, and the two work together to form a holding structure with a certain axial length. In other words, the protrusion structure and the contact spring arm work together to play an anti-shake role, thereby improving the vibration resistance of the connector. Attached Figure Description

[0019] Figure 1 This is a schematic diagram (sectional view) of the fit between the outer conductor and the sleeve of a connector in the prior art during vibration testing.

[0020] Figure 2 This is a schematic diagram of the structure of an embodiment of the outer conductor of the connector in this utility model;

[0021] Figure 3 This is a cross-sectional view of the connection between the outer conductor and the sleeve of the connector in this utility model during vibration testing.

[0022] Figure 4 for Figure 3 A magnified view of the contact area between the central boss and the sleeve.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Outer conductor; 2. Contact spring arm; 3. Boss; 4. Outer protrusion; 100. Sleeve; 101. Insertion part. Detailed Implementation

[0025] In order to provide a connector with stronger vibration resistance, the basic technical concept of this utility model is to add a protruding structure to the insertion part of the outer conductor. The protruding structure can be inserted into the mating cavity of the adapter connector and cooperate with the contact spring arm to prevent the connector from shaking at the mating position, thereby improving the vibration resistance of the connector.

[0026] Based on the above concept, the present invention will be further described in detail below with reference to different embodiments.

[0027] Specific embodiments of the outer conductor of the connector provided by this utility model:

[0028] like Figure 2As shown, the outer conductor 1 in this embodiment is generally consistent with the prior art. Its front end has a plug-in portion 101 for inserting into the mating cavity of the adapter connector. The plug-in portion 101 is provided with a contact spring arm 2. Specifically, the arrangement of the contact spring arm 2 can be consistent with the patent application with publication number CN115133351A cited in the background art, and the contact spring arm 2 has an outward protrusion 4. During mating, the contact spring arm 2 of the plug-in portion 101 can contact the inner wall of the mating cavity. The rear end of the outer conductor 1 has a cable connection portion for connecting a cable. During use, the cable can be connected to the rear end of the outer conductor 1, specifically by crimping.

[0029] Unlike existing technologies, in this embodiment, the outer periphery of the insertion portion 101 is provided with a protruding structure located behind the contact spring arm 2. The protruding structure is used to contact the inner wall of the mating cavity. During mating, the protruding structure and the contact spring arm 2 work together to form a retaining structure that restricts the swaying of the outer conductor 1. Compared with existing technologies that rely solely on the contact spring arm 2 to contact the mating cavity, in this embodiment, the protruding structure and the contact spring arm 2 work together to form a retaining area with a certain axial length. The mating of the outer conductor 1 and the adapter connector is more stable, and it is less prone to yielding and wear when used in environments with strong vibrations, thereby improving the vibration resistance of the connector.

[0030] Specifically, as a feasible approach, such as Figure 2 and Figure 3 As shown, the protruding structure includes two or more bosses 3 arranged circumferentially along the insertion portion 101. Specifically, the bosses 3 can be stamped. More specifically, three bosses 3 can be provided, and the three bosses 3 can be evenly distributed circumferentially. To provide basic anti-sway function, there should be at least two bosses 3. In the case of only two bosses, the two bosses 3 are arranged in the same radial direction to prevent the outer conductor 1 from swaying in different directions. However, it should be noted that in other embodiments, four or even more bosses 3 can be provided.

[0031] When conducting vibration tests, such as Figure 3 As shown, the contact spring arm 2 and the protruding structure including two or more bosses 3 jointly contact the inner wall of the contact sleeve 100 (simulating the mating cavity of the adapter connector). At this time, the deflection angle β of the outer conductor 1 is smaller than that of the prior art. Figure 1 Only when the contact spring arm 2 contacts the inner wall of the sleeve 100, that is, when used in situations with severe vibration, the outer conductor 1 is not prone to swaying or shaking, and the contact spring arm 2 is not prone to yielding and wear, thereby improving the vibration resistance of the connector.

[0032] Even better, such as Figure 2As shown, the number of protrusions 4 on the boss 3 and the contact spring arm 2 can correspond one-to-one and be arranged front to back. At this time, the two positions where the protrusions 4 and the boss 3 contact the inner wall of the sleeve 100 are also basically aligned front to back. The anti-sway support section formed between the two positions is basically parallel to the axial direction of the outer conductor 1. Compared with the scheme of staggering the protrusions 4 and the boss 3 in other embodiments, this preferred method has a better anti-sway effect.

[0033] As another feasible approach, the protruding structure can also be a continuous and closed annular protrusion located on the outer periphery of the insertion part 101. In this case, the protruding structure at any position in the circumferential direction can contact the inner wall of the insertion cavity, and can also play the role of cooperating with the contact spring arm 2 to jointly limit the shaking of the outer conductor 1.

[0034] It should be noted that, in addition to the two feasible methods mentioned above, other embodiments may also include cases where the protruding structure is a circumferentially non-closed rib. For example, the central angle between the two ends of the rib may be 300°, 270°, etc.

[0035] To facilitate the insertion of the raised structure into the mating cavity of the adapter connector, regardless of the type of raised structure used, a guide surface can be provided at the front end of the raised structure to guide it into the mating cavity. Figure 4 For example, the front end of the boss 3 (left side in the figure) has a slope or ramp, which constitutes a guide surface. Of course, in other embodiments, the guide surface may also be an arc surface. Of course, in other embodiments, the front end surface of the boss 3 may also be perpendicular to the outer peripheral surface of the insertion portion 101, which may require a larger force to push the outer conductor 1 in.

[0036] Specific embodiments of the connector provided by this utility model:

[0037] The connector in this embodiment is generally the same as the existing Mini-FAKRA connector, including a shell, outer conductor, inner conductor, insulator, etc. The structure of the outer conductor is the same as that described in the embodiment of the connector's outer conductor, and will not be described in detail here.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An outer conductor of a connector, the outer conductor having a front end with a plug-in portion (101) for insertion into a mating cavity of a mating connector, the plug-in portion (101) being provided with a contact spring arm (2), characterized in that The outer periphery of the plug-in part (101) is provided with a protruding structure at the rear side of the contact spring arm (2) for contacting the inner wall of the insertion cavity, and the protruding structure and the contact spring arm (2) jointly constitute a holding structure for limiting the shaking of the outer conductor (1).

2. The outer conductor of a connector according to claim 1, characterized in that The protruding structure comprises two or more than two bosses (3) arranged circumferentially at intervals.

3. The outer conductor of the connector of claim 2, wherein, The contact spring arm (2) is provided with an outer protrusion (4), and the boss (3) and the outer protrusion (4) correspond to each other and face each other front and back.

4. The outer conductor of the connector of claim 1, wherein, The protruding structure is an annular protruding rib.

5. The outer conductor of a connector according to any one of claims 1-4, characterized in that, The front end of the protruding structure is provided with a guide surface for guiding the protruding structure into the insertion cavity.

6. A connector comprising a housing and an outer conductor (1) mounted on the housing, the front end of the outer conductor (1) having a plug-in portion (101) for insertion into a mating connector insertion cavity, the plug-in portion (101) being provided with a contact spring arm (2), characterized in that, The outer periphery of the plug-in part (101) is provided with a protruding structure at the rear side of the contact spring arm (2) for contacting the inner wall of the insertion cavity, and the protruding structure and the contact spring arm (2) jointly constitute a holding structure for limiting the shaking of the outer conductor (1).

7. The connector of claim 6, wherein The protruding structure comprises two or more than two bosses (3) arranged circumferentially at intervals.

8. The connector of claim 7, wherein, The contact spring arm (2) is provided with an outer protrusion (4), and the boss (3) and the outer protrusion (4) correspond to each other and face each other front and back.

9. The connector of claim 6, wherein, The protruding structure is an annular protruding rib.

10. The connector of any one of claims 6-9, wherein, The front end of the protruding structure is provided with a guide surface for guiding the protruding structure into the insertion cavity.

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