A fakra connector

Abstract

The present application relates to a kind of fakra connectors, the rear part of front shell is provided with front plug-in structure, the front part of rear shell is provided with rear plug-in structure for being plugged with front plug-in structure Adaptation;Upper limit position convexity and lower limit position convexity are distributed on rear plug-in structure relative to central axis and the convex direction is perpendicular to central axis, in the upper and lower two joints of front plug-in structure and rear plug-in structure are plugged with each other respectively two limit structures for being held in the middle of rear plug-in structure are provided: with the interference fit of upper limit position convexity Upper limit position convexity cooperation structure, with the interference fit of lower limit position convexity Lower limit position convexity cooperation structure.The fakra connector provided by the present application, rear shell is righted by the upper and lower distribution of upper limit position convexity and lower limit position convexity relative to central axis, and then realize the anti-deviation effect of front shell relative to rear shell relative to central axis, guarantee the coaxiality of front hole in front shell and rear hole in rear shell along central axis after product assembly.

Description

Technical Field

[0001] This invention relates to coaxial connectors for transmitting signals, and more specifically to FAKRA connectors. Background Technology

[0002] In communication devices such as in-vehicle communication devices, data transmission requires connectors to connect with other devices. Coaxial connectors are commonly used, enabling communication between devices via coaxial cables. Mini FAKRA connectors, a type of coaxial connector, meet the automotive electronics industry's requirements for the universality of electronic components and are a standard interface in the automotive electronics industry. Compared to other FAKRA connectors, mini FAKRA connectors have advantages such as smaller size and higher speed. Existing mini FAKRA connector products can be found in the mini FAKRA automotive connector disclosed in patent document CN216289060U.

[0003] This type of mini-FAKRA connector includes: a shell, an insulator, an outer conductor, and an inner conductor. The outer conductor, inner conductor, and insulator constitute a coaxial contact. The coaxial contact is inserted and fixed in a contact mounting cavity within the shell. The shell includes a front shell and a rear shell. The front shell is used to connect the adapter connector, and the rear shell is used to mount it on a substrate, such as a printed circuit board. The contact mounting cavity is formed by mating front and rear holes respectively located in the front and rear shells. The front shell is made of plastic, usually injection molded, and can be called a plastic shell. The rear shell is made of metal, such as zinc alloy, usually die-cast, and can be called a rear shell. The rear shell connects to the outer conductor and provides shielding. The front end of the rear shell is inserted and fixed inside the front shell.

[0004] As mentioned earlier, the outer shell is formed by the fixed connection of a front shell and a rear shell. Therefore, it is necessary to ensure the reliability of the connection between the front and rear shells, as well as the coaxiality of the contact mounting cavity formed by the mating of the front and rear cavities, and the coaxiality of the coaxial contact within the mounting cavity. For this purpose, the specific structure used in this type of Fakra connector is, for example, that the interior of the front shell has a buckle near the rear end, and the outer surface of the rear shell has a boss that engages with the buckle, thus achieving a fixed connection between the front and rear shells. The insulator of the coaxial contact is inserted into the rear shell, and the fixing method is an interference fit between the boss and the inner surface of the rear shell. Another example is that axial limiting function is achieved by the limiting grooves on both sides of the front shell and the limiting platforms on both sides of the rear shell, with a clearance fit between the upper plane of the rear boss of the front shell and the lower plane of the rear boss. However, it was found during use that the front and rear shells in the existing technology have a large fitting gap when they are fitted together, and the front shell is skewed relative to the rear shell. The coaxiality of the front hole in the front shell and the rear hole in the rear shell is difficult to guarantee, which leads to the non-axisymmetry of the front and rear of the contact mounting cavity. This in turn causes the coaxial contact to be eccentric relative to the predetermined central axis, which poses a risk of reducing product performance. Summary of the Invention

[0005] The purpose of this invention is to provide a Fakra connector to solve the technical problem of coaxial contact misalignment caused by structural defects in the prior art.

[0006] A Fakra connector of the present invention has a central axis extending front to back, including a housing and contact units. The housing has a contact mounting cavity for mounting the contact units. The central axis of the contact mounting cavity coincides with or is parallel to the central axis and distributed around the central axis. The housing includes a front shell for connecting and mating the connector and a rear shell for mounting on a substrate. The contact mounting cavity is formed by mating a front hole in the front shell and a rear hole in the rear shell. The key feature is that the rear part of the front shell has a front insertion structure, and the front part of the rear shell has a fitting for mating with the front insertion structure. The rear insertion structure has upper and lower limit protrusions that are distributed vertically relative to the central axis and whose protrusion direction is perpendicular to the central axis. At the upper and lower joints where the front and rear insertion structures are inserted, there are two limiting structures for clamping the rear insertion structure in the middle: an upper limit protrusion fitting structure that is interference-fitted with the upper limit protrusion and a lower limit protrusion fitting structure that is interference-fitted with the lower limit protrusion. This allows the rear shell to straighten the front shell relative to the central axis through the upper and lower limit protrusions, so as to ensure the coaxiality of the front hole and the rear hole along the central axis.

[0007] The FAKRA connector provided by this invention achieves an interference fit between the front and rear shells through the corresponding limiting structures and limiting protrusions on the front and rear plug-in structures. Specifically, at the upper and lower joints of the front plug-in structure of the front shell and the rear plug-in structure of the rear shell, the rear shell uses upper and lower limiting protrusions distributed vertically to align the front shell relative to the central axis, thereby achieving the anti-deviation effect of the front shell relative to the rear shell relative to the central axis. This ensures the coaxiality of the front hole (the hole for inserting coaxial contact parts) in the front shell and the rear hole in the rear shell along the central axis after product assembly.

[0008] Furthermore, the front insertion structure of the front shell includes slots and tongues distributed vertically. The upper side wall of the slot is provided with a limiting rib extending forward and backward to form the upper limit convex hump fitting structure. The upper side of the tongue forms the lower limit convex hump fitting structure. The rear insertion structure of the rear shell includes a plug and a tongue insertion hole distributed vertically. The plug forms a forward-extending protrusion at the front end of the rear shell. The front end opening of the rear hole is located on the front end face of the plug. The plug is used to insert into the slot of the front shell. The upper limit convex hump is provided on the upper side of the plug. The upper limit convex hump protrudes upward and can be limited and fixed with the lower surface of the limiting rib. The tongue insertion hole is opened at the lower part of the front end of the rear shell and extends backward. The tongue insertion hole is used to be inserted by the tongue of the front shell. The lower limit convex hump is provided on the lower side of the plug and is located in the tongue insertion hole. The lower limit convex hump protrudes downward and can be limited and fixed with the upper side of the tongue of the front shell. This invention employs two pairs of male and female mating systems: a plug to a slot and a tongue to a hole. One pair has the male in front and the female in back, while the other pair has the female in front and the male in back, forming a specific interference fit structure at the upper and lower joints. The complementary fit structure makes the fit more secure. Furthermore, the upper and lower limit protrusions are placed on the upper and lower sides of the plug, allowing the two limit structures to clamp the rear plug structure at the front end of the rear shell in the middle, thereby better achieving the anti-deviation effect of the front shell relative to the rear shell relative to the central axis.

[0009] Furthermore, the slot is a U-shaped groove, and the slot includes: an upper groove wall, two groove side walls distributed on the left and right, a limiting rib set on the lower side of the upper groove wall, and a tongue set below the lower groove opening of the slot.

[0010] Furthermore, there are two or more limiting ribs, forming a guide groove between adjacent limiting ribs. A guide key is provided on the upper side of the plug. The upper limiting bulge is distributed next to the guide key. The guide key extends forward and backward and is used to be inserted into the guide groove for left and right direction limiting.

[0011] Furthermore, both the upper limit convex hull and the lower limit convex hull extend forward and backward, and the outline of their cross-sections is arc-shaped.

[0012] Furthermore, the rear side of the front shell and the front side of the rear shell are respectively provided with a limiting groove and a limiting boss. The limiting groove and the limiting boss cooperate to prevent the front shell from detaching relative to the rear shell in the front-rear direction. The limiting groove includes a side limiting groove and / or a top limiting groove, and the limiting boss includes a side limiting boss and / or a top limiting boss. The side limiting groove and the side limiting boss are distributed left and right based on the central axis, and the top limiting groove and the top limiting boss are located above the central axis. The top limiting groove and the top limiting boss cooperate to prevent the front shell from tilting downward relative to the rear shell when the front end of the front shell is subjected to a downward force. The center line extending along the front and rear of the side limiting groove and the side limiting boss is offset downward relative to the central axis of the contact mounting cavity. The side limiting groove and the side limiting boss cooperate to prevent the front shell from tilting upward relative to the rear shell when the front end of the front shell is subjected to an upward force.

[0013] Furthermore, the contact unit is a coaxial contact, which includes an insulator, an outer conductor, and an inner conductor. The coaxial contact has a cylindrical contact portion extending forward and backward and a connecting portion extending downward from the rear end of the cylindrical contact portion. The rear end of the rear shell is provided with a vertical channel for installing the connecting portion of the coaxial contact, a rearward opening, and a downward opening. The upper end of the vertical channel, as well as the rear and lower openings, are connected to the rear hole. The rear end of the rear shell is equipped with a baffle that is inserted upward from the vertical channel. Inside the rear shell, at the rear part of the vertical channel, there is a baffle slot extending vertically for installing the baffle. The two sides of the baffle are used to insert into the aforementioned baffle slot, and the front side of the baffle is used to block the insulator of the coaxial contact forward, so that the insulator is blocked and limited forward by the rear shell through the baffle.

[0014] Furthermore, the front side of the baffle is provided with side limiting protrusions on both sides. The side limiting protrusions of the baffle are fixedly engaged with the front and rear limiting slots of the rear shell to prevent the baffle from falling out of the baffle slots and to make the baffle and the rear shell engage with each other in a front and rear limiting manner.

[0015] Furthermore, a center limiting protrusion is provided at the center of the front side of the baffle, which is used to fix the baffle to the insulator in the front-back direction.

[0016] Furthermore, a baffle boss insertion hole extending upward from the vertical channel is also provided in the upper side wall of the rear shell, and the lower end of the baffle boss insertion hole communicates with the vertical channel; a baffle boss is provided in the center of the upper end of the baffle, and the baffle boss is used to cooperate with the baffle boss insertion hole on the rear shell. Attached Figure Description

[0017] Figure 1 This is an exploded view of the components of Embodiment 1 of the Fakra connector of the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure of the Fakra connector;

[0019] Figure 3 yes Figure 1 A schematic diagram of the front shell from the first perspective;

[0020] Figure 4 yes Figure 1 A schematic diagram showing the front shell after it has been cut open.

[0021] Figure 5 yes Figure 1 A schematic diagram of the rear shell from the first perspective;

[0022] Figure 6 yes Figure 1 A schematic diagram of the rear shell from the second perspective;

[0023] Figure 7 yes Figure 1 A schematic diagram of a portion of the posterior shell after it has been cut open;

[0024] Figure 8 yes Figure 1 A schematic diagram of the baffle in the middle;

[0025] Figure 9 yes Figure 1 A cross-sectional schematic diagram of the baffle in the middle;

[0026] Figure 10 yes Figure 1 One of the cross-sectional schematic diagrams of the Fakra connector in the image;

[0027] Figure 11 yes Figure 1 The second cross-sectional schematic diagram of the Fakra connector in the image;

[0028] Figure 12 yes Figure 1 The third schematic diagram of the cross-section of the Fakra connector;

[0029] Figure 13 yes Figure 1 The fourth cross-sectional schematic diagram of the Fakra connector in the image;

[0030] Figure 14 yes Figure 1 Fifth schematic diagram of the cross-section of the Fakra connector;

[0031] Figure 15 This is an exploded view of the components of Embodiment 2 of the Fakra connector of the present invention;

[0032] Figure 16 yes Figure 15 A schematic diagram of the structure of the Fakra connector;

[0033] Figure 17yes Figure 15 A three-dimensional schematic diagram of the Fakra connector;

[0034] Figure 18 yes Figure 15 A schematic diagram of the front shell;

[0035] Figure 19 yes Figure 15 A schematic diagram of the baffle from the first perspective;

[0036] Figure 20 yes Figure 15 A schematic diagram of the baffle from the second perspective;

[0037] Figure 21 yes Figure 15 A schematic diagram of the rear shell;

[0038] Figure 22 yes Figure 15 One of the cross-sectional schematic diagrams of the Fakra connector in the image;

[0039] Figure 23 yes Figure 15 The second cross-sectional schematic diagram of the Fakra connector in the image;

[0040] Figure 24 yes Figure 15 The third schematic diagram of the cross-section of the Fakra connector;

[0041] Figure 25 yes Figure 15 The fourth cross-sectional schematic diagram of the Fakra connector in the image;

[0042] In the picture:

[0043] 1. Front shell; 11. Front hole; 12. Slot; 121. Upper slot wall; 1211. Limiting rib; 1212. Guide groove; 122. Side slot wall; 13. Tongue; 14. Side wing limiting groove; 15. Top limiting groove; 2. Rear shell; 21. Rear hole; 22. Vertical channel; 221. Baffle slot; 222. Baffle boss insertion hole; 2221. Baffle boss insertion hole rib; 23. Rear opening; 24. Lower opening; 25. Side wing limiting boss; 26. Plug; 261. Guide key; 262. Upper limit rib 27. Tongue insertion hole; 271. Lower limit protrusion; 28. Positioning post; 29. ​​Middle partition; 30. Top limit protrusion; 3. Outer conductor; 31. Cylindrical body; 32. Tile-shaped rear part; 4. Inner conductor; 5. Insulator; 51. Columnar body; 511. Protruding rib; 52. Block-shaped rear part; 521. Stepped rectangular groove; 6. Baffle; 61. Baffle protrusion; 62. Protruding corner; 63. Angled angle; 64. Avoidance arc groove; 65. Side limit protrusion; 66. Middle limit protrusion; 67. Middle partition mating groove. Detailed Implementation

[0044] Embodiment 1 of the fakra connector of the present invention, as follows: Figures 1-14 As shown, the FAKRA connector includes a housing and contact units. The front end is a plug end. The FAKRA connector has a central axis extending from front to back. The housing has a contact mounting cavity for mounting the contact units. The contact mounting cavity has a central axis, which coincides with the main axis where the plug center of the contact unit is located. The central axis coincides with the central axis (single core, single contact unit), or the central axis is parallel to the central axis and evenly distributed around the central axis (multiple cores, multiple contact units).

[0045] The contact unit is a coaxial contact comprising an insulator 5, an outer conductor 3, and an inner conductor 4. The coaxial contact includes a cylindrical contact portion extending forward and backward, and a connecting portion extending downward from the rear end of the cylindrical contact portion. The cylindrical contact portion and the connecting portion are arranged in an L-shape. Embodiment 1 is a single-core connector, meaning there is one contact unit. However, in other embodiments, the number of contact units can be two or more. The number of contact mounting cavities in the housing corresponds to the number of contact units. In this embodiment, the contact mounting cavities are used to insert coaxial contacts. The axis of the cylindrical contact portion of the coaxial contact coincides with the central axis of the contact mounting cavity. The housing has a central axis. In Embodiment 1, a single coaxial contact is used, and the central axis of the contact mounting cavity coincides with the central axis. In other embodiments, when there are multiple coaxial contacts, the central axes of the contact mounting cavities are evenly distributed around the central axis.

[0046] The housing includes a front housing 1 and a rear housing 2. The front housing 1 is used to connect a mating connector, and the rear housing 2 is used to mount on a substrate, such as a printed circuit board. The contact mounting cavity is formed by mating a front hole 11 and a rear hole 21 respectively located in the front housing 1 and the rear housing 2. In Embodiment 1, there is one contact mounting cavity, so there is also one front hole 11 and one rear hole 21. Of course, in other embodiments, when there are two or more coaxial contacts, the number of front holes 11 and rear holes 21 will increase accordingly.

[0047] The outer conductor 3 of the coaxial contact includes a cylindrical body 31 and a tile-shaped rear part 32 distributed front and rear. The cylindrical body 31 has a first mounting hole arranged along the central axis for inserting the insulator 5. The tile-shaped rear part 32 has a downward opening. The outer surfaces of the left and right sides of the tile-shaped rear part 32 are provided with protrusions for fixing with the rear shell 2.

[0048] The insulator 5 includes a cylindrical body 51 and a block-shaped rear part. The cylindrical body 51 has a second mounting hole arranged along the central axis for inserting the inner conductor 4. The outer circular surface of the cylindrical body 51 is provided with a protruding rib 511 for fixing with the outer conductor 3. The block-shaped rear part is provided with a stepped rectangular groove that communicates with the second mounting hole. The inner conductor 4 is inserted into the insulator 5 with an interference fit.

[0049] The front shell 1 is an injection-molded plastic shell; the front shell 1 has a front hole 11 extending from front to back for the front insertion of the coaxial contact component. The rear end of the front shell 1 has a front insertion structure, which is adapted to the rear insertion structure provided at the front end of the rear shell 2.

[0050] The front insertion structure of the front shell 1 includes vertically distributed slots 12 and tongues 13. The slots 12 are U-shaped grooves and include an upper groove wall 121 and two horizontally distributed groove sidewalls. The slots 12 have a front groove opening, a rear groove opening, and a downward-facing lower groove opening that pass through the front and rear of the slot 12. The lower side of the upper groove wall 121 is provided with limiting ribs 1211, which extend forward and backward and are used to limit and fix with the upper limit protrusion 262 of the rear shell 2. There are two or more limiting ribs 1211, forming guide grooves 1212 between adjacent limiting ribs 1211. The tongues 13 are located below the lower groove opening and extend backward. The tongues 13 are used to insert into the tongue insertion hole 27 provided at the front end of the rear shell 2 for limiting and fixing with the rear shell 2. Therefore, the front shell 1 has two vertically distributed limiting structures at its rear end, which are respectively provided on the slots 12 and the tongues 13. The two limiting structures are used to clamp the rear insertion structure at the front end of the rear shell 2 in the middle. Furthermore, a side wing limiting groove 14 is provided on the inner side of the front shell 1 for limiting and fixing with the two limiting protrusions of the rear shell 2. Specifically, there are two side wing limiting grooves 14, which are respectively provided on the inner side of the groove side wall of the slot 12.

[0051] The rear shell 2 is made of die-cast metal. The rear shell 2 contacts the outer conductor 3 and can serve as a shield. Of course, in other embodiments, it can also be manufactured by stamping. The outer side surface of the rear shell 2 is provided with a side wing limiting boss 25, which is used to cooperate with the side wing limiting groove 14 of the front shell 1. Specifically, the side wing limiting boss 25 is provided on the left and right outer sides of the front part of the rear shell 2.

[0052] The rear housing 2 has a rear hole 21 extending forward and backward for inserting the rear part of the coaxial contact. The rear end of the rear housing 2 also has a vertical channel 22 for installing the connecting part of the coaxial contact, and the upper end of the vertical channel 22 communicates with the rear hole 21. The rear housing 2 has a rear opening 23 facing backward and a lower opening 24 facing downward, both of which communicate with the rear hole 21. The front part of the rear housing 2 has a front insertion structure, which is inserted and fixed to the front insertion structure at the rear of the front housing 1.

[0053] Specifically, the rear insertion structure at the front end of the rear shell 2 includes a plug 26 and a tongue-and-groove hole 27 distributed vertically. The plug 26 forms a forward-extending protrusion at the front end of the rear shell 2. The front opening of the rear hole 21 is located on the front end face of the plug 26. The plug 26 is used to insert into the slot 12, i.e., the U-shaped groove, of the front shell 1. A guide key 261 is provided on the upper side of the plug 26. The guide key 261 extends back and forth and is used to insert into the guide groove 1212 between the limiting ribs 1211 on the lower side of the upper groove wall 121 of the slot 12 of the front shell 1 for left and right direction limiting. An upper limit protrusion 262 is also provided on the upper side of the plug 26. The upper limit protrusion 262 protrudes upward and is distributed next to the guide key 261. The upper limit protrusion 262 is used to limit and fix the plug 262 to the lower surface of the limiting ribs 1211 on the lower side of the upper groove wall 121 of the U-shaped groove of the front shell 1. A tongue-and-insert hole 27 is located at the lower part of the front end of the rear shell 2 and extends rearward. The tongue-and-insert hole 27 is used to insert the tongue 13 of the front shell 1. A lower limiting protrusion 271 is provided on the upper side of the hole wall of the tongue-and-insert hole 27. Since the plug 26 is arranged adjacent to the tongue-and-insert hole 27, the lower side of the plug 26 also forms the upper side hole wall of the tongue-and-insert hole 27. Therefore, the lower limiting protrusion 271 is located on the lower side of the plug 26 and is in the tongue-and-insert hole 27. The lower limiting protrusion 271 protrudes downward and is used to limit and fix it with the upper side of the tongue 13 of the front shell 1. Both the upper limiting protrusion 262 and the lower limiting protrusion 271 extend back and forth and the outline of the cross section is arc-shaped.

[0054] Furthermore, the bottom of the rear shell 2 is provided with four positioning posts 28 for soldering to the printed circuit board. Inside the rear shell 2, at the rear of the vertical channel 22, there is a vertically extending baffle slot 221. The baffle slots 221 are symmetrically arranged on opposite left and right sidewalls inside the rear shell 2. The baffle slots 221 are used to install the baffle 6 described later. A baffle boss insertion hole 222 extending upward from the vertical channel 22 is also provided in the upper sidewall of the rear shell 2. The baffle boss insertion hole 222 is used to install the baffle boss 61 on the baffle 6 described later. The lower end of the baffle boss insertion hole 222 communicates with the vertical channel 22, and the upper end forms an opening on the upper surface of the rear shell 2. The baffle boss insertion hole 222 also has a forward-protruding baffle boss insertion hole rib 2221, which pushes the baffle boss 61 on the baffle 6 forward.

[0055] Based on the foregoing description, the structure for the limiting fit between the front shell 1 and the rear shell 2 can be summarized as follows: 1. The side wing limiting groove 14 on the rear side of the front shell 1 fits with the side wing limiting protrusion 25 on the side of the rear shell 2 to achieve the anti-detachment function of the front shell 1 relative to the rear shell 2 in the front-rear direction. 2. The limiting rib 1211 on the lower side of the upper groove wall 121 of the slot 12 of the front insertion structure of the front shell 1 is press-fitted with the upper limit protrusion 262 on the upper side of the plug 26 of the rear insertion structure of the rear shell 2. At the same time, the upper side of the tongue 13 of the front insertion structure of the front shell 1 is press-fitted with the lower limiting protrusion 271 on the upper side of the tongue hole 27 of the rear insertion structure of the rear shell 2. Thus, at the upper and lower joints of the front insertion structure of the front shell 1 and the rear insertion structure of the rear shell 2, the rear shell 2 uses the upper limit protrusion 262 and the lower limit protrusion 271 distributed vertically to straighten the front shell 1 relative to the central axis, thereby achieving the anti-deviation function of the front shell 1 relative to the rear shell 2 relative to the central axis, and thus ensuring the coaxiality of the front hole 11 (the hole for inserting the coaxial contact part) in the front shell 1 and the rear hole 21 in the rear shell 2 along the central axis after the product is assembled.

[0056] The rear end of the rear shell 2 is equipped with a baffle 6 that is inserted upward from the vertical channel 22. The two sides of the baffle 6 are used to insert into the aforementioned baffle slot 221. A baffle boss 61 is provided at the center of the upper end of the baffle 6. Two protruding corners 62 are provided on both sides of the upper edge of the baffle 61. The baffle boss 61 and the two protruding corners 62 are arranged in a "mountain" shape. The baffle boss 61 is used to cooperate with the baffle boss insertion hole 222 on the rear shell 2. The front and rear sides of the edge of the baffle boss 61 are provided with chamfers 63. The chamfers 63 make the thickness of the baffle boss 61 gradually thin in the direction towards the edge of the baffle boss 61, so as to facilitate insertion into the baffle boss insertion hole 222.

[0057] On the upper side of the baffle 6, at intervals between the protruding corners 62 and the baffle boss 61, there are clearance arc grooves 64. The clearance arc grooves 64 are used to avoid the inner wall of the rear shell 2, which facilitates the insertion of the protruding corners 62 into the baffle slots 221 and the insertion of both sides of the baffle 6 into the baffle slots 221. The clearance arc grooves 64 and the front and rear sides of the two protruding corners 62 are also provided with bevels 63, which allow the protruding corners 62 to be smoothly inserted into the baffle slots 221.

[0058] The front side of the baffle 6 has side limiting protrusions 65 on both sides. The side limiting protrusions 65 are spherical protrusions. The side limiting protrusions 65 of the baffle 6 are fixedly engaged with the baffle slot 221 of the rear shell 2 to prevent the baffle 6 from falling out of the baffle slot 221 and to make the baffle 6 and the rear shell 2 fixedly engaged. The front side of the baffle 6 is used to block the insulator 5 forward, so that the insulator 5 is blocked and limited forward by the rear shell 2 through the baffle 6. The center of the front side of the baffle 6 has a middle limiting protrusion 66, which is used to fix the insulator 5 in the front-rear direction.

[0059] As described above, the structure in which the baffle 6 is assembled in the rear shell 2 and engages with the insulator 5 for limiting is summarized as follows: 1. The side limiting protrusions 65 (spherical protrusions) on both sides of the front side of the baffle 6 are interference-fitted with the corresponding baffle slots 221 in the rear shell 2, which provides anti-detachment and axial limiting functions for the baffle 6 relative to the rear shell 2, forming the first axial limiting point A; 2. The baffle boss 61 at the upper end of the baffle 6 engages with the forward-protruding baffle boss insertion hole rib 2221 in the baffle boss insertion hole 222 at the top of the rear shell 2, which provides axial limiting functions for the baffle 6 relative to the rear shell 2, forming the second axial limiting point B. 3. The central limiting protrusion 66 on the front side of the baffle 6 engages with the insulator 5 to stop and limit its movement forward, achieving the axial limiting function of the insulator 5. The interference fit between the two eliminates the axial wobble gap of the insulator 5 relative to the rear shell 2, while ensuring that the baffle 6 is always subjected to an axial force (i.e., a backward force) in the opposite direction to the insertion area. The first and second axial limiting points mentioned above are located on the upper and lower sides of the central axis, respectively. This prevents the baffle 6 from tilting relative to the rear shell 2 when the baffle 6 is subjected to the axial force of the insulator 5, thereby ensuring the axial positioning accuracy of the insulator 5 relative to the rear shell 2. Thus, by assembling the baffle 6, the mating surface S (i.e., the surface flush with the upper end of the convex angle 62) of the baffle 6 and the inner wall of the rear shell 2 is made to fit together with the upper surface S1 of the inner wall of the rear shell 2. The width L1 of the baffle 6 in the left-right direction is greater than the hole dimensions L3 and L4 of the rear shell 2, and L2 is the overlapping section where the baffle 6 and the rear shell 2 are inserted. This ensures that, in the area where the rear shell 2 is located, except for the printed circuit board welding standoff surface C (lower side) used for welding with the printed circuit board, the insulator 5 is completely enclosed in the cavity formed by the rear shell 2 and the baffle 6. This effectively reduces the interference of external interference signals on the internal radio frequency signals of the connector, thereby improving product reliability.

[0060] In use, the above embodiments of the present invention are as follows: the inner conductor 4 is installed inside the insulator 5 and then the outer conductor 3 is installed to form a coaxial contact. The coaxial contact is installed in the rear shell 2 and the front shell 1. The front shell 1 and the rear shell 2 are interference-fitted together to form a coaxial contact mounting cavity. Finally, the baffle 6 is forcibly installed into the corresponding baffle slot 221 and baffle boss insertion hole 222 in the rear shell 2 to complete the product assembly.

[0061] like Figures 15-25As shown, the main differences between Embodiment 2 of the Fakra connector of the present invention and Embodiment 1 are: 1. There are two coaxial contacts and corresponding two contact mounting cavities. 2. The housing has two contact mounting cavities, and the rear end of the rear housing 2 has a middle partition 29 between the two rear holes 21. The rear end of the middle partition 29 protrudes rearward, and the baffle 6 has a middle partition mating groove 67 corresponding to the rear end of the middle partition 29. 3. In addition to the side wing limiting grooves 14 on the left and right sides, the limiting groove on the rear side of the front housing 1 also has a top limiting groove 15 on the upper side. Correspondingly, the side of the rear housing 2 also has a top limiting boss 30 that mates with the top limiting groove 15. The top limiting boss 30 is set on the upper side of the plug 26 of the rear housing 2.

[0062] Example 2, like Example 1, has the following features: First axial limiting point A: The side limiting protrusions 65 (spherical protrusions) on both sides of the front side of the baffle 6 are interference-fitted with the corresponding baffle slots 221 in the rear shell 2, which provides anti-detachment and axial limiting functions for the baffle 6 relative to the rear shell 2, forming the first axial limiting point A; Second axial limiting point B: The baffle boss 61 at the upper end of the baffle 6 is fitted with the forward-protruding baffle boss insertion hole rib 2221 in the baffle boss insertion hole 222 at the top of the rear shell 2, which provides axial limiting functions for the baffle 6 relative to the rear shell 2, forming the second axial limiting point B; and, the central limiting protrusion 66 provided in the center of the front side of the baffle 6 is fitted with the insulator 5 to stop and limit forward, realizing the axial limiting function of the insulator 5, and the two are interference-fitted, which can eliminate the axial wobble gap of the insulator 5 relative to the rear shell 2, while ensuring that the baffle 6 is always subjected to an axial force (i.e., a backward force) in the opposite direction to the insertion area.

[0063] The first and second axial limiting points mentioned above are located on the upper and lower sides of the central axis, respectively. This prevents the baffle 6 from tilting relative to the rear shell 2 when the baffle 6 is subjected to the axial force of the insulator 5, thereby ensuring the axial positioning accuracy of the insulator 5 relative to the rear shell 2. Thus, by assembling the baffle 6, the mating surface S (i.e., the surface flush with the upper end of the convex angle 62) of the baffle 6 and the inner wall of the rear shell 2 is made to fit together with the upper surface S1 of the inner wall of the rear shell 2. The width L1 of the baffle 6 in the left-right direction is greater than the hole dimensions L3 and L4 of the rear shell 2, and L2 is the overlapping section where the baffle 6 and the rear shell 2 are inserted. This ensures that, in the area where the rear shell 2 is located, except for the printed circuit board welding standoff surface C (lower side) used for welding with the printed circuit board, the insulator 5 is completely enclosed in the cavity formed by the rear shell 2 and the baffle 6. This effectively reduces the interference of external interference signals on the internal radio frequency signals of the connector, thereby improving product reliability.

[0064] The side wing limiting grooves 14 on both sides of the rear slot 12 of the front shell 1 cooperate with the side wing limiting protrusions 25 on the left and right sides of the rear shell 2 to achieve the anti-detachment function of the front shell 1 relative to the rear shell 2; the top limiting groove 15 on the upper rear side of the front shell 1 cooperates with the top limiting protrusion 30 on the upper front side of the rear shell 2. At the same time, the center line x1 of the side wing limiting protrusions 25 on the left and right sides of the front of the rear shell 2 is offset downward relative to the center axis x2 of the contact mounting cavity in the rear shell 2. When the front of the front shell 1 is subjected to an upward force F2, since the center line x1 of the side wing limiting protrusions 25 on the left and right sides of the front of the rear shell 2 is offset downward relative to the center axis x2 of the contact mounting cavity in the rear shell 2, the side wing limiting grooves 14 on the left and right sides of the front shell 1 cooperate with the side wing limiting protrusions 25 on the rear shell 2, and their force can prevent the front shell 1 from tilting upward relative to the rear shell 2.

[0065] In Example 2, after the rear shell 2 is fixed, when the front end of the front shell 1 is subjected to a downward force F1, the top limiting groove 15 on the upper rear side of the front shell 1 cooperates with the top limiting boss 30 on the upper front end of the rear shell 2. This prevents the front shell 1 from tilting downward relative to the rear shell 2. After the rear shell 2 is fixed, when the front end of the front shell 1 is subjected to an upward force F2, since the center line x1 of the side wing limiting bosses 25 on the left and right sides of the front end of the rear shell 2 is offset downward relative to the center axis x2 of the contact mounting cavity in the rear shell 2, the side wing limiting grooves 14 on both sides of the front shell 1 cooperate with the side wing limiting bosses 25 on both sides of the rear shell 2. Their force can prevent the front shell 1 from tilting upward relative to the rear shell 2, thus realizing the anti-tilting function of the plastic shell relative to the rear shell 2.

Claims

1. A FAKRA connector having a central axis extending front to back, comprising a housing and contact units, wherein the housing has a contact mounting cavity for mounting the contact units, the central axis of the contact mounting cavity coincides with or is parallel to the central axis and distributed around the central axis, the housing includes a front shell for connecting a mating connector and a rear shell for mounting on a substrate, the contact mounting cavity is formed by mating a front hole in the front shell and a rear hole in the rear shell, characterized in that, The rear of the front housing has a front insertion structure, which includes vertically distributed slots and tongues. The upper wall of the slots has front-to-back extending limiting ribs. The front of the rear housing has a rear insertion structure for mating with the front insertion structure. The rear insertion structure includes vertically distributed plugs and tongue holes. The plug forms a forward-extending protrusion at the front end of the rear housing for insertion into the slots of the front housing. The upper side of the plug has an upper limiting protrusion that protrudes upwards and can be fixed in place by the lower surface of the limiting ribs. The tongue hole is located at... The lower part of the front end of the rear shell extends rearward to allow the tongue of the front shell to be inserted. The lower side of the plug has a lower limiting protrusion in the tongue insertion hole. The lower limiting protrusion protrudes downward and can be fixed and limited by the upper side of the tongue. Both the upper and lower limiting protrusions are long strips that extend back and forth. They are distributed vertically relative to the central axis and the protrusion direction is perpendicular to the central axis. The rear shell uses the upper limiting protrusion to cooperate with the limiting rib and the lower limiting protrusion to cooperate with the upper side of the insertion to straighten the front shell relative to the central axis, so as to ensure the coaxiality of the front hole and the rear hole along the central axis.

2. The FAKRA connector according to claim 1, characterized in that, The slot (12) is a U-shaped slot, which includes: an upper slot wall (121), two slot side walls distributed on the left and right, a limiting rib (1211) set on the lower side of the upper slot wall (121), and a tongue (13) set below the lower slot opening of the slot (12).

3. The FAKRA connector according to claim 1, characterized in that, There are two or more limiting ribs (1211), and a guide groove (1212) is formed between adjacent limiting ribs (1211). A guide key (261) is provided on the upper side of the plug (26). The upper limiting rib (262) is distributed next to the guide key (261). The guide key (261) extends back and forth. The guide key (261) is used to insert into the guide groove (1212) for left and right direction limiting.

4. The FAKRA connector according to claim 1, characterized in that, The cross-sectional contours of the upper limit convex hull (262) and the lower limit convex hull (271) are arc-shaped.

5. The FAKRA connector according to claim 1, characterized in that, The front shell (1) and the rear shell (2) are respectively provided with a limiting groove and a limiting boss. The limiting groove and the limiting boss work together to prevent the front shell (1) from detaching from the rear shell (2) in the front-rear direction. The limiting groove includes a side wing limiting groove (14) and / or a top limiting groove (15). The limiting boss includes a side wing limiting boss (25) and / or a top limiting boss (30). The side wing limiting groove (14) and the side wing limiting boss (25) are distributed left and right based on the central axis. The top limiting groove (15) and the top limiting boss (30) are located in the center. Above the central axis; the top limiting groove (15) cooperates with the top limiting boss (30) to prevent the front shell (1) from tilting downward relative to the rear shell (2) when the front end of the front shell (1) is subjected to a downward force; the center line of the side wing limiting groove (14) and the side wing limiting boss (25) extending along the front and rear is offset downward relative to the central axis of the contact mounting cavity, and the side wing limiting groove (14) cooperates with the side wing limiting boss (25) to prevent the front shell (1) from tilting upward relative to the rear shell (2) when the front end of the front shell (1) is subjected to an upward force.

6. The FAKRA connector according to any one of claims 1-5, characterized in that, The contact unit is a coaxial contact, which has a cylindrical contact portion extending forward and backward and a connecting portion extending downward from the rear end of the cylindrical contact portion, and includes: an insulator (5), an outer conductor (3), and an inner conductor (4); the rear end of the rear shell (2) is provided with a vertical channel (22) for installing the connecting portion of the coaxial contact, as well as a rear opening (23) facing backward and a lower opening (24) facing downward, the upper end of the vertical channel (22) and the rear opening (23) and the lower opening (24) are all connected to the rear The holes (21) are connected; the rear end of the rear shell (2) is equipped with a baffle (6) that is inserted upward from the vertical channel (22). The rear shell (2) has a baffle slot (221) that extends vertically at the rear part of the vertical channel (22) for installing the baffle (6). The two sides of the baffle (6) are used to insert into the aforementioned baffle slot (221), while the front side of the baffle (6) is used to block the insulator (5) of the coaxial contact member forward, so that the insulator (5) is blocked and limited forward by the rear shell (2) through the baffle (6).

7. The FAKRA connector according to claim 6, characterized in that, The front side of the baffle (6) is provided with side limiting protrusions (65) on both sides. The side limiting protrusions (65) of the baffle (6) are fixedly engaged with the baffle slot (221) of the rear shell (2) to prevent the baffle (6) from falling out of the baffle slot (221) and to make the baffle (6) and the rear shell (2) engage in front and rear limiting.

8. The FAKRA connector according to claim 6, characterized in that, The baffle (6) has a center limit protrusion (66) on the front side, which is used to fix the insulator (5) in the front-back direction.

9. The FAKRA connector according to claim 6, characterized in that, The upper side wall of the rear shell (2) is also provided with a baffle boss insertion hole (222) extending upward from the vertical channel (22), and the lower end of the baffle boss insertion hole (222) is connected to the vertical channel (22); a baffle boss (61) is provided in the center of the upper end of the baffle (6), and the baffle boss (61) is used to cooperate with the baffle boss insertion hole (222) on the rear shell (2).

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