FAKRA connector

Abstract

The invention belongs to the technical field of electric connectors, and particularly provides a FAKRA connector. The FAKRA connector comprises an outer conductor, the outer conductor is provided with a jack for an adaptive connector to be inserted, a contact spring piece is installed in the jack, the contact spring piece is provided with a plurality of elastic claws which are arranged at intervals in the circumferential direction, and the outer conductor is provided with a stopping part which is in stopping fit with one end, away from a plugging end, of the contact spring piece. A positioning structure is arranged between the contact spring piece and the stopping part, the positioning structure comprises a positioning groove formed in one of the stopping part and the contact spring piece and a positioning protrusion arranged on the other one of the stopping part and the contact spring piece, and the positioning protrusion is inserted into the positioning groove so that the contact spring piece and the stopping part can be positioned and matched in a rotation stopping mode. And the positioning positions of the contact spring piece and the stopping part meet the requirement that the elastic claw corresponds to the avoiding structure in position. The positioning structure is additionally arranged between the contact spring piece and the outer conductor, so that the contact spring piece is kept at a determined position, and normal plugging of the adaptive connector is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical connectors, and in particular relates to a FAKRA connector. Background Art

[0002] The FAKRA connector is a well-known radio frequency connector in the field of automotive electronics, and is generally used in modules such as car radios, positioning systems, car networking, cameras, remote controls, and car Bluetooth. The FAKRA connector generally includes a housing, an outer conductor, a center conductor, a locking structure, etc. The center conductor is mounted on an insulator and is mounted inside the outer conductor through the insulator. One end of the outer conductor has a socket for inserting a mating connector. A cylindrical contact spring sheet is usually provided in the socket, and a plurality of spring claws arranged at intervals along the circumferential direction are provided on the contact spring sheet. The mating mating connector can be inserted into the contact spring sheet to achieve elastic contact with the mating mating connector, such as the curved FAKRA connector disclosed in the patent with the authorization announcement number CN215645295U.

[0003] The contact spring piece and the outer conductor are generally tightly fitted, and a stopper is provided on the outer conductor. The stopper and the end of the contact spring piece that is away from the plug-in end of the outer conductor are stoppered in the insertion direction of the outer conductor for plugging with the adapter connector to limit the extreme position of the outer conductor in the jack. An avoidance structure (such as an avoidance groove) is provided on the inner wall of the jack of the outer conductor. After the adapter connector is inserted, the avoidance structure provides space for the spring claw of the contact spring piece to produce outward elastic deformation. This requires that the spring claw of the contact spring piece and the avoidance structure position correspond to each other in the circumferential direction. If there is a large assembly deviation, it is easy to cause the spring claw to be stuck, and in severe cases, the adapter connector cannot be inserted normally. In the prior art, there is no positioning structure between the contact spring piece and the outer conductor, making it difficult to achieve accurate positioning of the contact spring piece. Summary of the invention

[0004] The object of the present invention is to provide a FAKRA connector to solve the technical problem in the prior art that the contact spring piece and the outer conductor of the FAKRA connector are difficult to accurately position and assemble.

[0005] To achieve the above object, the technical solution of the FAKRA connector provided by the present invention is: A FAKRA connector comprises an outer conductor, the plug-in end of the outer conductor has a socket for inserting an adapter connector, a contact spring sheet is installed in the socket, a plurality of spring claws arranged at intervals along the circumferential direction are provided on the contact spring sheet, an avoidance structure for avoiding outward expansion and deformation of the spring claws is provided in the socket, the outer conductor is provided with a stopper portion which is engaged with the end of the contact spring sheet away from the plug-in end in the plug-in direction, a positioning structure is provided between the contact spring sheet and the stopper portion, the positioning structure comprises a positioning groove provided in one of the stopper portion and the contact spring sheet and a positioning protrusion provided in the other, the positioning protrusion is inserted into the positioning groove so that the contact spring sheet and the stopper portion are positioned and engaged to prevent rotation, and the positioning positions of the contact spring sheet and the stopper portion satisfy the correspondence between the positions of the spring claws and the avoidance structure.

[0006] As a further improvement, the contact spring piece is provided with a connector located between two adjacent spring claws and connecting the two ends of the contact spring piece, and the contact spring piece is provided with the positioning groove, which is located at the end of the contact spring piece and corresponds to the connector; or, the contact spring piece is provided with the positioning protrusion, which is located at the end of the contact spring piece and corresponds to the connector.

[0007] As a further improvement, at least two positioning protrusions and two positioning grooves are arranged at intervals along the circumferential direction.

[0008] As a further improvement, the positioning protrusions and the positioning grooves are evenly spaced along the circumferential direction.

[0009] As a further improvement, a stop groove or a stop hole is provided on the contact spring sheet, and a riveting portion is provided on the outer conductor, and the riveting portion is pressed into the stop groove or the stop hole.

[0010] As a further improvement, the outer circumference of the outer conductor has a location where the wall thickness is reduced, and the location constitutes the riveted portion.

[0011] As a further improvement, the anti-retreat groove is a groove that penetrates in the radial direction or the anti-retreat hole is a hole that penetrates in the radial direction.

[0012] As a further improvement, the contact spring piece is provided with the aforementioned stop groove, and the stop groove is arranged at the end position of the contact spring piece close to one end of the plug-in end.

[0013] As a further improvement, the number of the anti-recession grooves or anti-recession holes is consistent with the positioning grooves, and they are arranged opposite to each other along the plug-in direction of the outer conductor.

[0014] As a further improvement, the inner concave surface of the positioning groove and the convex surface of the positioning protrusion are both arc-shaped surfaces.

[0015] The present invention belongs to an improved invention creation, and its beneficial effect is: the FAKRA connector provided by the present invention adds a positioning structure between the outer conductor and the contact spring sheet, wherein the positioning structure includes a positioning protrusion and a positioning groove respectively arranged on the stopper of the contact spring sheet and the outer conductor, and the positioning protrusion is inserted into the positioning groove to realize positioning and prevent the contact spring sheet from rotating relative to the outer conductor. Due to the presence of the positioning protrusion, during the assembly process, if the positioning protrusion is not adjusted to the position corresponding to the positioning groove, the contact spring sheet cannot be assembled normally at this time, and after the positioning protrusion is adjusted to the position corresponding to the positioning groove, the spring claw can be placed in the position corresponding to the avoidance structure, that is, the present invention ensures that the contact spring sheet and the outer conductor can be accurately positioned and installed by setting the positioning structure, and after being installed in place, under the action of the positioning structure, the contact spring sheet will not rotate easily, thereby making each spring claw of the contact spring sheet remain in the position of the avoidance structure corresponding to the outer conductor, ensuring that the spring claw can be elastically deformed normally when the adapter connector is plugged in. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 An exploded view of an embodiment of a FAKRA connector in the present invention; Figure 2 It is a front view of the outer conductor and the contact spring piece of the FAKRA connector embodiment of the present invention after being installed in place; Figure 3 A side view of the outer conductor and the contact spring piece of the FAKRA connector embodiment of the present invention after being installed in place; Figure 4 A cross-sectional view of an outer conductor and a contact spring sheet of a FAKRA connector embodiment of the present invention after being installed in place; Figure 5 A side view of an outer conductor of an embodiment of a FAKRA connector of the present invention; Figure 6 A front view of a contact spring sheet of a FAKRA connector embodiment of the present invention; Figure 7 A top view of a contact spring sheet of a FAKRA connector embodiment of the present invention; Figure 8 FIG. 4 is a side view of a contact spring piece of a FAKRA connector embodiment of the present invention.

[0017] Description of reference numerals: 1. Shell; 2. CPA structure; 3. Contact spring sheet; 4. Outer conductor; 5. Sealing ring; 6. Insulator; 7. Center jack; 8. Baffle; 9. Plastic shell; 10. Center pin; 11. Crimp shielding ring; 301. Spring claw; 302. Positioning groove; 303. Retaining groove; 304. Connector; 401. Stop step; 402. Positioning protrusion; 403. Spot rivet groove; 404. Avoidance groove. DETAILED DESCRIPTION

[0018] In order to ensure that the contact spring piece and the outer conductor of the FAKRA connector can be reliably positioned and installed, the basic technical concept of the present invention is to add a positioning structure between the contact spring piece and the outer conductor. Specifically, the positioning structure is arranged between one end of the contact spring piece and the stopper in the plug hole of the outer conductor. More specifically, the positioning structure includes a protrusion and a groove structure that are plugged (embedded) with each other. When the protrusion and the groove can be normally plugged, it means that the contact spring piece and the outer conductor have been accurately positioned, and rotation between the contact spring piece and the outer conductor can also be avoided, that is, the contact spring piece is kept in a determined position, which is convenient for normal plugging of the plugged adapter connector. The present invention is further described in detail below in conjunction with the embodiments.

[0019] Specific embodiments of the FAKRA connector provided by the present invention: The FAKRA connector provided in this embodiment is a curved structure. Figure 1 As shown, it includes a housing 1, a CPA structure 2, a contact spring sheet 3, an outer conductor 4, a sealing ring 5, an insulator 6, a center pin 10, a center jack 7, a plastic shell 9, a crimping shielding ring 11, etc. The center pin 10 and the center jack 7 are plugged together to form the center conductor of the FAKRA connector. The center pin 10 and the center jack 7 are both installed in the insulator 6 to form a whole, and then the whole is installed in the outer conductor 4. The back side of the outer conductor 4 (the side away from the plug-in and mating side of the adapter connector) is an opening, and the insulator 6 can be installed from the back side opening. After installation, the baffle 8 can be used to block the opening of the outer conductor 4. The wire cable can be crimped with the center pin 10, and the crimping part enters the outer conductor 4 and is fixed with a crimping shielding ring 11 to form a wiring harness assembly as a whole. After the wiring harness assembly is installed, a plastic sealing process can be used to form a plastic shell 9 to protect the wiring harness assembly.

[0020] One end of the outer conductor 4 for mating with the adapter connector (i.e., the plug-in end) passes through the inner hole of the outer shell 1 (insulating material), and in order to achieve a certain dustproof and waterproof effect, a sealing ring 5 is also sleeved on the outer conductor 4. At the same time, a CPA structure 2 is also provided between the outer conductor 4 and the outer shell 1 to achieve stable locking of the outer conductor 4 and the outer shell 1.

[0021] like Figure 1-Figure 5 As shown, the plug-in end of the outer conductor 4 has a socket for inserting the adapter connector, and the socket is equipped with a contact spring piece 3, which is a cylindrical structure, such as Figure 6-Figure 8As shown, it includes a plurality of circumferentially spaced claws 301. After the adapter connector is inserted, the claws 301 can be opened outward by force and elastically deformed. The contact spring sheet 3 and the socket are tightly fitted. In order to prevent the contact spring sheet 3 from being pushed away when the adapter connector is inserted, the outer conductor 4 is naturally provided with a stopper that stops the end of the contact spring sheet 3 away from the plug-in end in the insertion direction of the outer conductor 4. Specifically, the stopper can be the annular (circumferentially continuous and closed) stopper step 401 shown in the figure. Of course, in other embodiments, the stopper can also be a stopper boss that is discontinuous or incompletely closed in the circumferential direction. The outer conductor 4 can be made by a die-casting process, and any form of the stopper can be manufactured.

[0022] Considering that the claw 301 needs to expand and deform outward after being stressed, the inner wall of the jack of the outer conductor 4 is provided with an avoidance structure accordingly. The avoidance structure can be the avoidance groove 404 shown in the figure, or the avoidance structure can also be a circumferentially closed hole formed by thinning the wall thickness of the outer conductor 4, that is, the avoidance hole. Here, the avoidance structure is taken as an example of the avoidance groove 404. The position of the avoidance groove 404 should correspond to the position of the claw 301, otherwise the claw 301 will be stuck, making it difficult for the adapter connector to be inserted normally with normal force. For this reason, in this embodiment, a positioning structure is also provided between the contact spring sheet 3 and the stop portion (stop step 401). The positioning structure includes a positioning groove 302 and a positioning protrusion 402. Taking the figure as an example, the positioning groove 302 is arranged on the contact spring sheet 3, and the positioning protrusion 402 is arranged on the stop portion (stop step 401). After the contact spring piece 3 is normally installed, the positioning protrusion 402 is inserted into the positioning groove 302, and after the positioning protrusion 402 and the positioning groove 302 are inserted and positioned, the positioning position satisfies the position correspondence between the spring claw 301 and the avoidance groove 404. The protruding direction of the positioning protrusion 402 and the concave direction of the positioning groove 302 are parallel to the axial direction of the contact spring piece 3 (that is, the insertion direction), and after the positioning protrusion 402 and the positioning groove 302 are inserted and positioned, the contact spring piece 3 will not rotate.

[0023] From the analysis of the above structure, it can be known that due to the presence of the positioning protrusion 402, during the assembly process, if the positioning protrusion 402 is not adjusted to the position corresponding to the positioning groove 302, the contact spring piece 3 cannot be assembled normally. That is, the present embodiment ensures that the contact spring piece 3 and the outer conductor 4 can be accurately positioned and installed by setting a positioning structure, and after being installed in place, under the action of the positioning structure, the contact spring piece 3 will not rotate easily, thereby making each spring claw 301 of the contact spring piece 3 correspond to the avoidance groove 404 of the outer conductor 4, ensuring that the spring claw 301 can be elastically deformed normally when the adapter connector is plugged in.

[0024] It is not difficult to understand that in other embodiments, the positions of the positioning protrusion 402 and the positioning groove 302 can also be interchanged, that is, the positioning protrusion is set on the contact spring piece 3, and the positioning groove is set at the position of the stopper, in which case the same positioning and anti-rotation functions can be achieved. However, the contact spring piece 3 is generally made by stamping technology. If the positioning protrusion is set on the contact spring piece 3, more materials need to be removed when manufacturing the contact spring piece 3, which will increase the cost to a certain extent.

[0025] Analyzing the function of the positioning structure, it can be seen that, most basically, the number of the positioning groove 302 and the positioning protrusion 402 are both one. However, in a preferred embodiment, as Figure 4 and Figure 5 As shown, there are two positioning grooves 302 and two positioning protrusions 402, and the two positioning grooves 302 and the positioning protrusions 402 are arranged at intervals in the circumferential direction. This allows two locations for positioning and stopping between the contact spring piece 3 and the outer conductor 4, so that the contact spring piece 3 and the outer conductor 4 can have better stopping and positioning effects. Of course, in other embodiments, when the space is sufficient and the strength of the contact spring piece 3 is guaranteed, three, four or even more positioning grooves 302 and positioning protrusions 402 can be provided.

[0026] In a further preferred embodiment, when there are more than two positioning grooves 302 and positioning protrusions 402, the positioning grooves 302 and positioning protrusions 402 are preferably evenly distributed in the circumferential direction. Figure 4 and Figure 5 For example, when there are only two positioning grooves 302 and positioning protrusions 402, the connecting line between the two positioning grooves 302 and the connecting line between the two positioning protrusions 402 pass through the center of the circle. This can make the contact spring piece 3 evenly stressed in the circumferential direction, further improving the anti-rotation stability of the contact spring piece 3.

[0027] In addition, in order to avoid the occurrence of edges and corners at the positions where the positioning groove 302 and the positioning protrusion 402 cooperate, preferably, as Figure 4 As shown, the inner concave surface of the positioning groove 302 and the convex surface of the positioning protrusion 402 are both arc-shaped surfaces.

[0028] In some preferred embodiments, Figure 4 , Figure 7 and Figure 8As shown, the contact spring sheet 3 is provided with a connector 304 located between two adjacent spring claws 301. The connector 304 connects the two ends of the contact spring sheet 3 and can be regarded as the skeleton of the contact spring sheet 3 as a whole. For the case where the positioning groove 302 shown in the figure is set on the contact spring sheet 3, the positioning groove 302 can be set at the end of the contact spring sheet 3 and the position corresponding to the connector 304 in the plug-in direction. Of course, for the case where the positioning protrusion is set on the contact spring sheet 3, the positioning protrusion can be set at the end of the contact spring sheet 3 and the position corresponding to the connector 304 in the plug-in direction. Compared with other embodiments in which the positioning groove 302 is set at a position corresponding to the spring claw 301, such a setting can ensure that the positioning groove 302 and the positioning protrusion 402 have sufficient strength after positioning and plugging. At the same time, it will not affect the normal deformation of the spring claw 301.

[0029] In addition, considering that when the FAKRA connector is in use, the contact spring piece 3 may be pulled out of the outer conductor 4 when the adapter connector is pulled out. For this reason, in addition to the tight fit between the contact spring piece 3 and the outer conductor 4, riveting is also used to fix them. Figure 1-Figure 6 A stop groove 303 is provided on the contact spring piece 3, and a riveting portion is provided on the outer conductor 4. After the contact spring piece 3 is normally rotated into the insertion hole of the outer conductor 4, the riveting portion on the outer conductor 4 is pressed into the stop groove 303, which can prevent the contact spring piece 3 from withdrawing from the outer conductor 4 when the adapter connector is pulled out.

[0030] Due to the presence of the positioning structure, the circumferential position of the contact spring piece 3 relative to the outer conductor 4 is determined. In order to facilitate riveting, the outer circumference of the outer conductor 4 has a location where the wall thickness is reduced, such as Figure 2 As shown, in some embodiments, a spot rivet groove 403 is formed at this position, and the above-mentioned riveting portion is actually composed of the spot rivet groove 403 at the position where the wall thickness is reduced. Compared with other embodiments in which the spot rivet groove 403 is not provided but the insertion hole wall of the outer conductor 4 is directly spot-riveted, on the one hand, the spot rivet groove 403 is accurately positioned and pressed into the stop groove 303, and on the other hand, it is also convenient for riveting.

[0031] It should be noted that the aforementioned anti-retraction groove 303 refers to a groove-shaped structure with an opening on one side. In fact, in other embodiments, in order to achieve the anti-retraction effect, an equivalent alternative is to set an anti-retraction hole on the periphery of the contact spring sheet 3, that is, a circumferentially closed structure. The riveting part can be pressed into the anti-retraction hole to achieve the same anti-retraction effect.

[0032] Regardless of whether the riveting part cooperates with the anti-recoil groove 303 or the anti-recoil hole, the anti-recoil groove 303 or the anti-recoil hole can be configured as a radially penetrating structure, that is, the anti-recoil groove 303 is a radially penetrating groove, and the anti-recoil hole is a radially penetrating hole. In this way, the wall thickness of the contact spring sheet 3 can be fully utilized, so that the riveting part has a sufficiently large pressing depth, thereby improving the anti-recoil effect.

[0033] In other preferred embodiments, Figure 1 As shown, the stop groove 303 is arranged at the end position of the contact spring piece 3 close to the plug end. Compared with other implementations in which the stop groove 303 is arranged at the middle position of the contact spring piece 3, this can ensure that the contact spring piece 3 has sufficient strength to ensure stable contact with the adapter connector after plugging.

[0034] In other preferred embodiments, in order to facilitate the normal positioning and insertion of the positioning groove 302, the anti-retraction grooves 303 or anti-retraction holes are configured to be consistent with the number of the positioning grooves 302, and are arranged directly opposite to each other along the insertion direction of the outer conductor 4. For details, see Figure 4 and Figure 8 When assembling the contact spring sheet 3, the position of the anti-retraction groove 303 (or the anti-retraction hole) can be conveniently observed to accurately adjust the positioning groove 302 and the positioning protrusion 402 for normal positioning and insertion. Moreover, in the case where the positioning groove 302 is set at a position corresponding to the connecting body 304, the anti-retraction groove 303 (or the anti-retraction hole) is also at a position corresponding to the connecting body 304, so that the riveting part and the anti-retraction groove 302 can have a higher strength.

[0035] A FAKRA connector with a bent structure is described above in conjunction with the accompanying drawings. It should be added that the above-mentioned matching method of the outer conductor and the contact spring piece is equally applicable to a FAKRA connector with a straight structure.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A FAKRA connector, comprising an outer conductor (4), the plug-in end of the outer conductor (4) having a plug-in hole for inserting a matching connector, a contact spring sheet (3) being installed in the plug-in hole, a plurality of spring claws (301) being arranged at intervals in the circumferential direction on the contact spring sheet (3), a avoidance structure for avoiding the spring claws (301) from expanding outward and deforming, the outer conductor (4) being provided with a stopper for stopping and cooperating with an end of the contact spring sheet (3) facing away from the plug-in end in a plug-in direction, wherein: A positioning structure is provided between the contact spring piece (3) and the stop portion, the positioning structure comprising a positioning groove (302) provided in one of the stop portion and the contact spring piece (3) and a positioning protrusion (402) provided in the other, the positioning protrusion (402) being inserted into the positioning groove (302) so that the contact spring piece (3) and the stop portion are positioned and anti-rotationally matched, and the positioning positions of the contact spring piece (3) and the stop portion are such that the positions of the spring claw (301) and the avoidance structure correspond.

2. The FAKRA connector according to claim 1, characterized in that: The contact spring sheet (3) is provided with a connector (304) located between two adjacent spring claws (301) and connecting the two ends of the contact spring sheet (3); the contact spring sheet (3) is provided with the positioning groove (302), which is located at the end of the contact spring sheet (3) and at a position corresponding to the connector (304); or the contact spring sheet (3) is provided with the positioning protrusion (402), which is located at the end of the contact spring sheet (3) and at a position corresponding to the connector (304).

3. The FAKRA connector according to claim 1 or 2, characterized in that: Both the positioning protrusion (402) and the positioning groove (302) are provided with at least two of them arranged at intervals along the circumferential direction.

4. The FAKRA connector according to claim 3, characterized in that: The positioning protrusions (402) and the positioning grooves (302) are evenly spaced along the circumferential direction.

5. The FAKRA connector according to claim 1 or 2, characterized in that: A stop groove (303) or a stop hole is provided on the contact spring sheet (3), and a riveting portion is provided on the outer conductor (4), and the riveting portion is pressed into the stop groove (303) or the stop hole.

6. The FAKRA connector according to claim 5, characterized in that: The outer circumference of the outer conductor (4) has a location where the wall thickness is reduced, and the location constitutes the riveted portion.

7. The FAKRA connector according to claim 5, characterized in that: The anti-retreat groove (303) is a groove that penetrates in the radial direction, or the anti-retreat hole is a hole that penetrates in the radial direction.

8. The FAKRA connector according to claim 5, characterized in that: The contact spring piece (3) is provided with the aforementioned stop groove (303), and the stop groove (303) is arranged at an end position of the contact spring piece (3) close to one end of the plug-in end.

9. The FAKRA connector according to claim 5, characterized in that: The number of the anti-retraction grooves (303) or anti-retraction holes is the same as that of the positioning grooves (302), and they are arranged opposite each other along the plug-in direction of the outer conductor (4).

10. The FAKRA connector according to claim 1 or 2, characterized in that: The inner concave surface of the positioning groove (302) and the convex surface of the positioning protrusion (402) are both arc-shaped surfaces.

Images