FAKRA waterproof connector

Abstract

The utility model discloses an FAKRA waterproof connector, which comprises an outer conductor, an insulator arranged in the outer conductor, a central conductor inserted in the center of the insulator, a plastic shell sleeved outside the outer conductor, and a waterproof plug fixed at the rear end of the plastic shell through a rear cover, and a lead passes through a wire hole of the waterproof plug and then is conductively connected with the central conductor and the outer conductor, the outer diameter of the wire is smaller than the inner diameter of the wire hole, the wire is sleeved with a heat-shrinkable sleeve, the heat-shrinkable sleeve is fixed to the outer portion of the wire in a wrapping mode through heat shrinkage, the outer diameter of the shrunk heat-shrinkable sleeve is larger than the inner diameter of the wire hole, and after the heat-shrinkable sleeve penetrates through the wire hole of the waterproof plug, the outer surface of the heat-shrinkable sleeve and the wire hole of the waterproof plug are assembled in a sealed mode. The FAKRA waterproof connector can be directly matched with an RG174 radio frequency line, achieves a good waterproof effect, can be matched with an RG178 radio frequency line with a smaller size after being provided with a heat-shrinkable sleeve under the condition that the waterproof plug is not replaced, and also achieves a good waterproof effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to connector technical field, especially a FAKRA waterproof connector. BACKGROUND

[0002] The main supporting fields of the electric connector are traffic, communication, network, IT, medical treatment, household appliance, military electronic product etc., the rapid development of the product technical level of the supporting field and the rapid growth of its market strongly pull the development of the connector technology. So far, the electric connector has developed into a series of products with complete types, rich varieties and specifications, various structure types, fine professional direction, obvious industry characteristics and standard system specification.

[0003] The FAKRA connector is a known automobile electronic industry standard connector, the existing FAKRA connector generally includes an outer conductor, an insulator arranged in the outer conductor, a center conductor inserted in the center of the insulating seat and a plastic shell sleeved on the outer conductor, a butt joint groove is formed between the outer wall of the outer conductor and the inner wall of the plastic shell, an insertion groove is formed between the inner wall of the outer conductor and the insulator, and the center conductor is exposed in the insertion groove; wherein the wire is threaded in the outer conductor and is welded with the center conductor in conduction, in order to improve the waterproof effect, a waterproof plug is arranged at the rear end of the plastic shell, the waterproof plug is sleeved on the periphery of the wire, and the rear end of the plastic shell is also provided with a rear cover to limit the waterproof plug at the rear end of the plastic shell, so as to achieve the purpose of sealing and waterproofing the rear end of the plastic shell and the wire.

[0004] In the actual use process, the wire adopts the RG174 radio frequency line, the inner diameter of the hole in the middle of the waterproof plug is matched with the outer diameter of the RG174 radio frequency line, that is, the inner diameter of the hole in the middle of the waterproof plug is slightly smaller than the outer diameter of the RG174 radio frequency line, so as to ensure the sealing performance of assembly; wherein the outer diameter of the RG174 radio frequency line is about 2.8mm, the inner diameter of the hole in the middle of the waterproof plug is 2.3±0.1mm, so that the tightness of the RG174 radio frequency line after passing through the hole in the middle of the waterproof plug is very good.

[0005] For the RG178 radio frequency wire, its outer diameter is about 1.8 mm, that is, the outer diameter of the RG178 radio frequency wire is smaller than that of the RG174 radio frequency wire, and is also smaller than the inner diameter of the through hole in the waterproof plug, so that when the wire adopts the RG178 radio frequency wire, the waterproof plug cannot be sealed and assembled with the RG178 radio frequency wire, and the direct phenomenon of loosening or shaking will occur, the structure is unstable, and the waterproof performance requirement cannot be met. At this time, in order to achieve the waterproof effect, most manufacturers need to open the waterproof plug with a smaller inner hole size (less than 1.5 mm), so that the RG178 radio frequency wire can pass through the through hole in the waterproof plug to achieve the waterproof effect. However, this will increase the mold opening cost, which is not conducive to improving the market competitiveness of the product, and the inner hole size of the waterproof plug is small, which is not convenient for assembly with the RG178 radio frequency wire, and the assembly efficiency is affected.

[0006] Therefore, the present application provides the following technical scheme. The utility model discloses a FAKRA waterproof connector which can directly adapt to RG174 radio frequency wire and achieve good waterproof effect.

[0007] The utility model discloses a FAKRA waterproof connector which can directly adapt to RG174 radio frequency wire and achieve good waterproof effect.

[0008] In order to solve the above technical problems, the utility model adopts the following technical scheme: the FAKRA waterproof connector comprises an outer conductor, an insulator arranged in the outer conductor, a center conductor inserted in the center of the insulator, a plastic shell arranged outside the outer conductor, and a waterproof plug fixed to the rear end of the plastic shell through a rear cover. The wire passes through the wire hole of the waterproof plug and is connected with the center conductor and the outer conductor. The outer diameter of the wire is smaller than the inner diameter of the wire hole. A heat shrinkable sleeve is arranged outside the wire. The heat shrinkable sleeve is fixed on the outside of the wire by heating and shrinking. The outer diameter of the shrunk heat shrinkable sleeve is greater than the inner diameter of the wire hole. The outer surface of the heat shrinkable sleeve is sealed and assembled with the wire hole of the waterproof plug after passing through the wire hole of the waterproof plug.

[0009] Further, in the above technical scheme, the inner diameter of the wire hole is 2.3±0.1 mm. The wire is RG178 radio frequency wire with an outer diameter of 1.8 mm. The outer diameter of the shrunk heat shrinkable sleeve is greater than or equal to 2.8 mm.

[0010] Further, in the above technical scheme, the metal wire core of the wire is connected with the center conductor. The metal braided mesh of the wire is wrapped around the rear end of the outer conductor and is welded and fixed. The front end of the heat shrinkable sleeve is fixed around the rear end of the outer conductor and wraps the metal braided mesh.

[0011] Further, in the above technical solution, the inner wall of the wire hole of the waterproof plug is further formed with a plurality of first sealing convex ribs which are spaced and protrude inward, and the first sealing convex ribs are in extrusion contact with the outer surface of the heat-shrinkable sleeve.

[0012] Further, in the above technical solution, the rear end of the plastic shell is provided with a stepped groove, the waterproof plug is embeddedly installed in the stepped groove, and the waterproof plug is formed with a plurality of second sealing convex ribs which are spaced and protrude outward, and the second sealing convex ribs are in extrusion contact with the stepped groove; the rear end of the waterproof plug is provided with a protruding part, the rear cover passes through the protruding part and abuts against the rear end of the waterproof plug to limit the waterproof plug in the stepped groove.

[0013] Further, in the above technical solution, the rear end of the plastic shell is provided with a stop flange and a guide protrusion located at the rear side of the stop flange, the front end of the rear cover is provided with a guide groove matched with the guide protrusion, the rear cover is sleeved on the rear end of the plastic shell and is buckled and fixed, and the front end of the rear cover abuts against the rear end surface of the stop flange, and the guide protrusion is embedded in the guide groove.

[0014] Further, in the above technical solution, the rear end of the plastic shell is further provided with a protruding buckle; the front end of the rear cover is provided with an elastic buckle plate which has a buckle hole matched with the protruding buckle, and the elastic buckle plate is buckled and fixed with the protruding buckle through the buckle hole after passing the protruding buckle.

[0015] Further, in the above technical solution, the lower end of the plastic shell is provided with a butt joint seat which is provided with a butt joint groove, and the opening of the butt joint groove penetrates through the front end surface of the butt joint seat.

[0016] Further, in the above technical solution, the lower end of the butt joint groove further penetrates through the lower end surface of the butt joint seat, and the upper inner wall of the butt joint groove is further provided with a groove body.

[0017] Further, in the above technical solution, the front end of the plastic shell is provided with a lock buckle which is provided with an inclined guide surface.

[0018] Compared with the prior art, the utility model has the following beneficial effects: The utility model uses the wire of which the outer diameter is smaller than the inner diameter of the wire hole of the waterproof plug, the wire is externally sleeved with the heat shrink sleeve to increase the outer diameter size, so that the outer diameter is larger than the inner diameter of the wire hole, so that the wire sleeved with the heat shrink sleeve can be sealed and assembled with the waterproof plug, and there is no gap between them, the problem of wire loosening or shaking caused by the inadaptation of the existing FAKRA waterproof connector structure to the thin wire is solved, and the waterproof performance requirement can be met. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the perspective view of the utility model;

[0020] Figure 2 is the perspective view of another angle of the utility model;

[0021] Figure 3 is the sectional view of the utility model;

[0022] Figure 4 is the perspective exploded view of the utility model;

[0023] Figure 5 is the assembly view of the outer conductor, the wire and the heat shrink sleeve in the utility model. DETAILED DESCRIPTION

[0024] The utility model is further illustrated below in combination with specific embodiments and drawings.

[0025] See Figures 1-5 As shown in the figure, it is a FAKRA waterproof connector, which can directly adapt to the RG174 radio frequency wire with large wire diameter size and achieve good waterproof effect; and without replacing the waterproof plug, it can also adapt to the RG178 radio frequency wire with smaller size after sleeving the heat shrink sleeve, and also achieve good waterproof effect.

[0026] Specifically, the above-mentioned FAKRA waterproof connector comprises an outer conductor 1, an insulator 2 arranged in the outer conductor 1, a center conductor 3 inserted into the center of the insulator 2, a plastic shell 4 sleeved outside the outer conductor 1, and a waterproof plug 6 fixed to the rear end of the plastic shell 4 through a rear cover 5, wherein the outer conductor 1, the insulator 2 and the center conductor 3 are coaxially arranged, and a wire 7 is connected with the center conductor 3 and the outer conductor 1 after passing through a wire hole 61 of the waterproof plug 6, wherein the outer diameter of the wire 7 is smaller than the inner diameter of the wire hole 61, at this time, if the wire 7 is directly arranged in the wire hole 61 of the waterproof plug 6, a gap will be formed therebetween, which will cause the phenomenon of looseness or shaking, the structure is unstable, and the waterproof performance requirement cannot be met.

[0027] To this end, the utility model makes improvement, under the premise that waterproof plug 6 is not replaced, heat shrink sleeve 8 is sleeved outside wire 7, heat shrink sleeve 8 is fixed on the outside of wire 7 by heating and shrinking, and the outer diameter of heat shrink sleeve 8 after shrinking is greater than the inner diameter of wire hole 61, so that the outer surface of heat shrink sleeve 8 after passing through wire hole 61 of waterproof plug 6 is sealed and assembled with wire hole 61 of waterproof plug 6, that is to say, the utility model uses wire 7 with an outer diameter smaller than the inner diameter of wire hole 61 of waterproof plug 6, heat shrink sleeve 8 is sleeved outside wire 7 to increase the outer diameter size, so that the outer diameter is greater than the inner diameter of wire hole 61, so that wire 7 sleeved with heat shrink sleeve 8 can be sealed and assembled with waterproof plug 6 without gap, the problem that the structure of the existing FAKRA waterproof connector is not suitable for thin wires and causes the looseness or shaking of the wire is solved, and the waterproof performance requirement can be met. Since the existing waterproof plug 6 does not need to be replaced, that is, a new waterproof plug does not need to be re-molded, the mold opening cost can be reduced, and the market competitiveness can be improved. In addition, since a waterproof plug with a smaller inner hole size (less than 1.5 mm) is not used, but a waterproof plug with a relatively large inner hole size is used, the wire sleeved with the heat shrink sleeve 8 is convenient to arrange and install, and the assembly efficiency is higher.

[0028] The above-mentioned thin wire refers to a wire with an outer diameter smaller than the inner diameter of the wire hole 61 of the waterproof plug.

[0029] In the embodiment, the inner diameter of the wire hole 61 of the waterproof plug is 2.3±0.1 mm, the wire 7 adopts an RG178 radio frequency wire with an outer diameter of 1.8 mm, and the outer diameter of the heat shrink sleeve 8 after shrinking is greater than or equal to 2.8 mm, that is, the heat shrink sleeve 8 is sleeved outside the RG178 radio frequency wire, is shrunk by heating, and the outer diameter of the heat shrink sleeve 8 after shrinking is greater than or equal to 2.8 mm, that is, the outer diameter is greater than the inner diameter of the wire hole 61. When the waterproof plug is sleeved on the heat shrink sleeve 8 after shrinking, the two are tightly assembled in an interference fit, and the sealing effect is excellent.

[0030] In some embodiments, the inner wall of the wire hole 61 of the waterproof plug 6 is further formed with a plurality of first sealing convex ribs 611 which are spaced apart and protrude inward, and the first sealing convex ribs 611 are in extrusion contact with the outer surface of the heat-shrinkable sleeve 8, so that the sealing effect is better.

[0031] The metal wire core 71 of the wire 7 is in conductive connection with the center conductor 3, the metal woven mesh 72 of the wire 7 is wrapped around the rear end of the outer conductor 1 and is welded and fixed, so that the wire 7 is in conductive connection with the center conductor 3 and the outer conductor 1, the front end of the heat-shrinkable sleeve 8 is sleeved on the outer periphery of the rear end of the outer conductor 1 and wraps the metal woven mesh 72, which can keep the metal woven mesh 72 and the welding structure of the metal woven mesh 72 and the rear end of the outer conductor 1, thereby achieving the protection effect. At the same time, the heat-shrinkable sleeve 8 can also increase the tensile resistance between the wire 7 and the outer conductor 1 to a certain extent, solve the problem of cable loosening and shaking caused by the mismatch of the structure of the existing FAKRA waterproof connector and the thin wire, and ensure that the tensile force between the outer conductor and the wire can reach 70N, so that the performance is reliable, thereby improving the product quality and service life.

[0032] Specifically, the assembly structure of the plastic shell 4 and the waterproof plug 6 is described as follows:

[0033] The rear end of the plastic shell 4 is provided with a stepped groove 41, the waterproof plug 6 is embeddedly installed in the stepped groove 41, and the outer periphery of the waterproof plug 6 is formed with a plurality of second sealing convex ribs 62 which are spaced apart and protrude outward, the second sealing convex ribs 62 are in extrusion contact with the stepped groove 41, and the second sealing convex ribs 62 have excellent sealing effect and good waterproof effect; the rear end of the waterproof plug 6 is provided with a protruding portion 63, the rear cover 5 passes through the protruding portion 63 and abuts against the rear end of the waterproof plug 6, so as to limit the waterproof plug 6 in the stepped groove 41, which can make the rear cover 5 and the waterproof plug 6 form stable assembly, and facilitate the wire 7 to pass through the protruding portion 63 and extend out of the rear cover 5, which also has a certain waterproof effect.

[0034] The assembly structure of the plastic shell 4 and the rear cover 5 is described as follows:

[0035] The rear end of the plastic shell 4 is provided with a stop flange 42 and a guide protrusion 43 located at the rear side of the stop flange 42, the front end of the rear cover 5 is provided with a guide groove 51 matched with the guide protrusion 43, the rear cover 5 is sleeved on the rear end of the plastic shell 4 and is buckled and fixed, the front end of the rear cover 5 abuts against the rear end surface of the stop flange 42, and the guide protrusion 43 is embedded in the guide groove 51, which can achieve the guiding effect and also limit the rear cover 5 to prevent the rear cover 5 from rotating in the circumferential direction relative to the plastic shell 4.

[0036] The rear end of the plastic shell 4 is provided with a protruding buckle 44, and the front end of the rear cover 5 is provided with an elastic buckle plate 52 with a buckle hole 521 matched with the protruding buckle 44.

[0037] The lower end of the plastic shell 4 is provided with a butt joint seat 45 provided with a butt joint groove 451 with an opening penetrating through the front end surface of the butt joint seat 45.

[0038] The lower end of the butt joint groove 451 further penetrates through the lower end surface of the butt joint seat 45, and the inner wall of the butt joint groove 451 is further provided with a groove body 452 used for assembling with a positioning protruding rib of a shell or other structure to play a guiding and limiting role.

[0039] The front end of the plastic shell 4 is provided with a lock buckle 46 provided with an inclined guide surface 461 used for locking with a lock hole of a matched connector to form stable electrical conduction.

[0040] In summary, the utility model uses a wire 7 with an outer diameter smaller than the inner diameter of a wire hole 61 of a waterproof plug 6, and the wire 7 is externally provided with a heat shrink sleeve 8 to increase the outer diameter, so that the outer diameter is larger than the inner diameter of the wire hole 61, so that the wire 7 provided with the heat shrink sleeve 8 can be assembled with the waterproof plug 6 in a sealed manner without gaps, solving the problem of wire loosening or shaking caused by the inadaptation of the wire to the FAKRA waterproof connector structure, and achieving the waterproof performance requirement. Since the existing waterproof plug 6 does not need to be replaced, that is, a new waterproof plug does not need to be re-molded, the utility model can reduce the mold opening cost and improve the market competitiveness. In addition, since a waterproof plug with a smaller inner hole size (less than 1.5 mm) is not used, but the existing waterproof plug with a relatively large inner hole size is used, the wire provided with the heat shrink sleeve 8 is convenient to install, and the assembly efficiency is higher.

[0041] Of course, the above only describes specific embodiments of the utility model, and does not limit the utility model implementation range, and equivalent changes or modifications made according to the structure, features and principles of the utility model patent application scope should be included in the utility model patent application scope.

Claims

1. A FAKRA waterproof connector, comprising an outer conductor (1), an insulator (2) installed in the outer conductor (1), a center conductor (3) inserted in the center of the insulator (2), a plastic shell (4) sleeved outside the outer conductor (1), and a waterproof plug (6) fixed to the rear end of the plastic shell (4) through a rear cover (5), and a wire (7) passing through a wire hole (61) of the waterproof plug (6) and being in conductive connection with the center conductor (3) and the outer conductor (1), wherein, The outer diameter of the wire (7) is smaller than the inner diameter of the wire hole (61), characterized in that: The wire (7) is externally sleeved with a heat-shrinkable sleeve (8), which is fixed on the outside of the wire (7) by shrinking after heating, and the outer diameter of the shrunk heat-shrinkable sleeve (8) is greater than the inner diameter of the wire hole (61), so that the outer surface of the heat-shrinkable sleeve (8) is in sealing assembly with the wire hole (61) of the waterproof plug (6) after passing through the wire hole (61) of the waterproof plug (6).

2. A FAKRA waterproof connector according to claim 1, characterized in that: The inner diameter of the wire hole (61) is 2.3±0.1mm; the wire (7) adopts RG178 radio frequency wire, and the outer diameter is 1.8mm; the outer diameter of the shrunk heat-shrinkable sleeve (8) is greater than or equal to 2.8mm.

3. A FAKRA waterproof connector according to claim 2, characterized in that: The metal wire core (71) of the wire (7) is connected with the center conductor (3), the metal woven mesh (72) of the wire (7) is wrapped around the rear end of the outer conductor (1) and is welded and fixed, and the front end sleeve of the heat-shrinkable sleeve (8) is fixed on the periphery of the rear end of the outer conductor (1) and wraps the metal woven mesh (72).

4. A FAKRA watertight connector according to any one of claims 1-3, characterized in that: The inner wall of the wire hole (61) of the waterproof plug (6) is further formed with a plurality of first sealing convex ribs (611) which are distributed at intervals and protrude inward, and the first sealing convex ribs (611) are in extrusion contact with the outer surface of the heat-shrinkable sleeve (8).

5. A FAKRA watertight connector according to any one of claims 1-3, characterized in that: The rear end of the plastic shell (4) is provided with a stepped groove (41), the waterproof plug (6) is embeddedly installed in the stepped groove (41), and the waterproof plug (6) is formed with a plurality of second sealing convex ribs (62) which are distributed at intervals and protrude outward, the second sealing convex ribs (62) are in extrusion contact with the stepped groove (41); the rear end of the waterproof plug (6) is provided with a convex part (63), the rear cover (5) passes through the convex part (63) and abuts against the rear end of the waterproof plug (6), so as to limit the waterproof plug (6) in the stepped groove (41).

6. A FAKRA waterproof connector according to claim 5, characterized in that: The rear end of the plastic shell (4) is provided with a stop flange (42) and a guide protrusion (43) located at the rear side of the stop flange (42), the front end of the rear cover (5) is provided with a guide groove (51) matched with the guide protrusion (43), the rear cover (5) is sleeved on the rear end of the plastic shell (4) and is buckled and fixed, and the front end of the rear cover (5) abuts against the rear end surface of the stop flange (42), and the guide protrusion (43) is embedded in the guide groove (51).

7. A FAKRA waterproof connector according to claim 6, characterized in that: The rear end of the plastic shell (4) is further provided with a protruding buckle (44); the front end of the rear cover (5) is provided with an elastic buckle plate (52), the elastic buckle plate (52) has a buckle hole (521) matched with the protruding buckle (44), and the elastic buckle plate (52) is buckled and fixed with the protruding buckle (44) through the buckle hole (521) after passing the protruding buckle (44).

8. A FAKRA watertight connector according to any one of claims 1-3, characterized in that: The lower end of the plastic shell (4) is provided with a butt joint seat (45), the butt joint seat (45) is provided with a butt joint groove (451), and the opening of the butt joint groove (451) penetrates through the front end surface of the butt joint seat (45) forwardly.

9. A FAKRA waterproof connector according to claim 8, characterized in that: The lower end of the butt joint groove (451) further penetrates through the lower end surface of the butt joint seat (45) downwardly, and the upper inner wall of the butt joint groove (451) is further provided with a groove body (452).

10. A FAKRA waterproof connector according to claim 9, characterized in that: The front end of the plastic shell (4) is provided with a lock buckle (46), and the lock buckle (46) is provided with an inclined guide surface (461).

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