A cable assembly and a Fakra electrical connector assembly comprising it

Abstract

The present application relates to a cable assembly, comprising a cable, a conductive terminal, an insulating sleeve, a shielding mesh folding sleeve and a metal shielding sleeve. The conductive terminal is in communication with the central conductor of the cable. The insulating sleeve is sleeved on the periphery of the conductive terminal. The metal shielding sleeve is sleeved on the periphery of the outer sheath layer, the shielding mesh folding sleeve and the insulating sleeve, and is deformed to compress the outer sheath layer when subjected to external force. An annular blocking flange is continuously extended outward around the outer sidewall of the insulating sleeve. An annular blocking step is formed in the inner cavity of the metal shielding sleeve, which is matched with the annular blocking flange. The conductive terminal tightly holds the central conductor of the cable. The conductive terminal is provided with a stop limiting unit and a retreat limiting unit, and the insulating sleeve is correspondingly provided with an annular limiting step and a limiting notch, which are matched with the stop limiting unit and the retreat limiting unit. In addition, the present application also relates to a Fakra electrical connector assembly comprising the above-mentioned cable assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric connector manufacturing, in particular to a cable assembly and a Fakra electric connector assembly comprising the same. BACKGROUND

[0002] The Fakra connector belongs to a coaxial signal transmission connector, and is initially mainly applied to the transmission of radio frequency signals. After the market appears a coaxial and LVDS signal conversion C, the application range is expanded to the field of video signal transmission, and is widely applied to the field of automotive electronic entertainment systems, and is an important part of signal transmission between vehicle-mounted multimedia devices. The Fakra connector has good shielding and signal stability, fast transmission rate, high cost performance, small size and other characteristics. The product is used for: vehicle-mounted navigation, vehicle-mounted electronic instrument, 360 panoramic system, vehicle-mounted automatic driving system, etc.

[0003] In actual application scenarios, the Fakra electric connector assembly is mainly composed of an electric connector female seat (generally selected from a high-speed coaxial radio frequency connector type), an electric connector male seat and a cable assembly. The cable assembly comprises a cable, a conductive terminal, an insulating sleeve, a shielding mesh folding sleeve and a metal shielding sleeve. The conductive terminal is connected with the center conductor of the cable and is in electrical conduction. The insulating sleeve is sleeved on the periphery of the conductive terminal. The shielding mesh folding sleeve is sleeved on the periphery of the shielding mesh layer, and is deformed to realize the compression of the shielding mesh layer when subjected to external force. The metal shielding sleeve is sleeved on the peripheries of the outer sheath layer, the shielding mesh folding sleeve and the insulating sleeve, and is deformed to realize the compression of the outer sheath layer when subjected to external force. However, in the prior art, due to the lack of effective limiting measures between the conductive terminal and the insulating sleeve and between the insulating sleeve and the metal shielding sleeve, the conductive terminal will inevitably produce a certain amount of axial displacement along the inner cavity of the insulating sleeve after the plug-in is completed. The plug-in operation of the electric connector female seat is performed, which causes the following problems: 1) After repeated plug-in cycles, the center conductor of the cable is prone to fatigue cracking, and even breaking, thereby affecting the stability and reliability of the signal transmission process; 2) The plug-in difficulty between the conductive terminal and the wiring terminal is increased, and the conductive terminal is prone to axial deflection relative to the wiring terminal during the plug-in process, which also deteriorates the stability and reliability of the signal transmission process. Therefore, it is urgent for technical personnel to solve the above problems. SUMMARY

[0004] Therefore, in view of the above existing problems and defects, the designers of the present application collect relevant data, evaluate and consider various aspects, and through the continuous experiments and modifications of technical personnel with many years of research and development experience in this industry, finally lead to the appearance of this cable assembly.

[0005] To solve the above technical problems, the present application relates to a cable assembly, comprising a cable, a conductive terminal, an insulating sleeve, a shielding mesh folding sleeve and a metal shielding sleeve. The cable is sequentially sleeved from inside to outside by a center conductor, an inner insulating layer, a shielding mesh layer and an outer sheath layer. The conductive terminal is connected with the center conductor and conducts electricity. The insulating sleeve is sleeved on the periphery of the conductive terminal. The shielding mesh folding sleeve is sleeved on the periphery of the shielding mesh layer, and it is deformed when subjected to external force to realize the compression of the shielding mesh layer. The metal shielding sleeve is simultaneously sleeved on the periphery of the outer sheath layer, the shielding mesh folding sleeve and the insulating sleeve, and it is deformed when subjected to external force to realize the compression of the outer sheath layer. The outer side wall of the insulating sleeve continues to extend outwardly to form an annular stop flange, and correspondingly, an annular stop step is formed in the inner cavity of the metal shielding sleeve, which is matched with the annular stop flange. When the insulating sleeve is inserted into the metal shielding sleeve, the annular stop step abuts against the annular stop flange to limit the axial displacement of the insulating sleeve. From left to right, the conductive terminal is sequentially connected by a clamping section and an insertion section. The clamping section surrounds or half-surrounds the center conductor, and it is deformed when subjected to external force to realize the holding of the center conductor. The insertion section is provided with a forward limiting unit and a backward limiting unit. The forward limiting unit is composed of two forward limiting pieces which are outwardly extended from the side wall of the insertion section and oppositely arranged. The backward limiting unit is spaced apart from the forward limiting unit by a certain distance, and it is composed of two backward limiting fins which are outwardly extended from the side wall of the insertion section and oppositely arranged. An annular limiting step is arranged in the inner cavity of the insulating sleeve, and when the conductive terminal is inserted into the insulating sleeve, the annular limiting step abuts against the right side of the forward limiting piece to limit the axial displacement of the forward limiting piece. In addition, two oppositely arranged limiting notches are formed in the side wall of the insulating sleeve. When the conductive terminal is inserted into the insulating sleeve, the backward limiting fin is opposite to the limiting notch to limit the axial displacement of the backward limiting fin.

[0006] As a further improvement of the technical scheme of the present application, the conductive terminal is preferably an integrated stamping and bending piece. The forward limiting piece is outwardly bent at 90° and continuously extended from the butt joint edge of the conductive terminal.

[0007] As a further improvement of the technical scheme of the present application, the backward limiting fin is directly outwardly bent and punched from the side wall of the conductive terminal.

[0008] As a further improvement of the technical scheme of the present application, around the circumferential direction, the clamping section is sequentially connected by a front clamping fin, a clamping section body and a rear clamping fin. The clamping section body is used to directly hold the center conductor, and the front clamping fin and the rear clamping fin are arranged on the two sides of the center conductor in a half-surrounding manner. The front clamping fin and the rear clamping fin are simultaneously deformed when subjected to external force to realize the holding of the center conductor.

[0009] As a further improvement of the technical scheme of the present application, a front-positioned friction-increasing groove is formed on the front-positioned clamping fin on the side opposite to the center conductor. The number of the front-positioned friction-increasing grooves is multiple, and they are linearly arranged along the length extension direction of the front-positioned clamping fin.

[0010] Analogous to the design form of the front-positioned clamping fin described above, a rear-positioned friction-increasing groove is formed on the rear-positioned clamping fin on the side opposite to the center conductor. The number of the rear-positioned friction-increasing grooves is multiple, and they are linearly arranged along the length extension direction of the rear-positioned clamping fin.

[0011] Compared with the cable assembly of the conventional design structure, in the technical scheme disclosed in the present application, the conductive terminal is additionally provided with a stop-in piece and a stop-out clamping fin, and the insulating sleeve is correspondingly provided with an annular limiting step and a limiting notch which are adapted to the stop-in piece and the stop-out clamping fin, respectively. When the conductive terminal is inserted into the insulating sleeve, the annular limiting step is located on the right side of the stop-in piece to limit the axial displacement movement of the stop-in piece, and at the same time, the stop-out clamping fin is located opposite to the limiting notch to limit the axial displacement movement of the stop-out clamping fin. In addition, the insulating sleeve is limited in the inner cavity of the metal shielding sleeve, and the metal shielding sleeve is connected with the outer protective sleeve layer. In this way, on the one hand, the conductive terminal can be effectively ensured to always remain in the correct assembly position relative to the insulating sleeve during the insertion process, thereby avoiding the early fatigue fracture of the center conductor caused by repeated insertion, and finally ensuring the reliable and stable signal transmission process; on the other hand, the difficulty of insertion between the conductive terminal and the terminal can be effectively reduced, and the conductive terminal can always remain in the correct insertion posture relative to the terminal during the insertion process.

[0012] In addition, the present application also discloses a Fakra electrical connector assembly which comprises a Fakra electrical connector male seat, a Fakra electrical connector female seat and the above-mentioned cable assembly. The cable assembly is built-in and fixed in the Fakra electrical connector male seat, and as a whole, it is inserted with the Fakra electrical connector female seat. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0014] Figure 1 is an exploded schematic view of the Fakra electrical connector assembly in the present application.

[0015] Figure 2is a perspective view of the Fakra electrical connector assembly of the present invention.

[0016] Figure 3 is a perspective view of the cable assembly of the Fakra electrical connector assembly of the present invention.

[0017] Figure 4 is a perspective view of Figure 3 from above.

[0018] Figure 5 is a cross-sectional view of Figure 4 along A-A.

[0019] Figure 6 is a perspective view of the conductive terminal of the Fakra electrical connector assembly of the present invention from one view.

[0020] Figure 7 is a perspective view of the conductive terminal of the Fakra electrical connector assembly of the present invention from another view.

[0021] Figure 8 is a perspective view of the insulating sleeve of the Fakra electrical connector assembly of the present invention.

[0022] Figure 9 is a perspective view of Figure 8 from above.

[0023] Figure 10 is a cross-sectional view of Figure 9 along B-B.

[0024] Figure 11 is a perspective view of the metal shielding sleeve of the Fakra electrical connector assembly of the present invention.

[0025] Figure 12 is a perspective view of Figure 11 from above.

[0026] Figure 13 is a cross-sectional view of Figure 12 along C-C.

[0027] Figure 14 is a close-up view of Figure 5 at I.

[0028] 1-Fakra male connector; 2-Fakra female connector; 3-Cable assembly; 31-Cable; 311-Center conductor; 312-Inner insulation layer; 313-Shielding mesh layer; 314-Outer sheath layer; 32-Conductive terminal; 321-Clamping section; 3211-Front clamping wing; 32111-Front friction-enhancing groove; 3212-Clamping section body; 3213-Rear clamping wing; 32131-Rear friction-enhancing groove; 322-Mating section; 3221-Stop limiting unit; 32211-Stop piece; 3222-Reverse limiting unit; 32221-Reverse locking wing; 33-Insulating sleeve; 331-Annular stop flange; 332-Annular limiting step; 333-Limiting notch; 34-Shielding mesh gathering sleeve; 35-Metallic shielding sleeve; 351-Annular stop step. Detailed Implementation

[0029] In the description of this invention, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 2 The exploded schematic diagrams of the Fakra electrical connector assembly of this invention are shown. It can be seen that it mainly consists of several parts, including the Fakra electrical connector male socket 1, the Fakra electrical connector female socket 2, and the aforementioned cable assembly 3. The cable assembly 3 is built into and fixed within the Fakra electrical connector male socket 1, and as a whole, it is inserted into the Fakra electrical connector female socket 2 to cooperate in order to achieve signal transmission.

[0031] like Figure 3 , 4 As shown in Figure 5, the cable assembly 3 mainly consists of a cable 31, conductive terminals 32, an insulating sleeve 33, a shielding mesh gathering sleeve 34, and a metal shielding sleeve 35. The cable 31 is formed by sequentially fitting a central conductor 311, an inner insulating layer 312, a shielding mesh layer 313, and an outer sheath layer 314 from the inside out. The conductive terminals 32 are connected to the central conductor 311 and provide electrical conductivity. The insulating sleeve 33 is fitted around the conductive terminals 32. The shielding mesh gathering sleeve 34 is fitted around the shielding mesh layer 313, and it shrinks under external force to compress the shielding mesh layer 313. The metal shielding sleeve 35 is fitted around the outer sheath layer 314, the shielding mesh gathering sleeve 34, and the insulating sleeve 33, and it shrinks under external force to compress the outer sheath layer 314.Figure 8 As shown, an annular retaining flange 331 extends outward from the outer wall of the insulating sleeve 33. Correspondingly, an annular retaining step 351 adapted to the annular retaining flange 331 is formed in the inner cavity of the metal shielding sleeve 35. Figure 11 , 12 (As shown in Figure 13). After the insulating sleeve 33 is inserted relative to the metal shielding sleeve 35, the annular stop step 351 abuts against the annular stop flange 331 to limit the axial displacement movement of the insulating sleeve 33 (as shown in Figure 13). Figure 14 (as shown in the image).

[0032] like Figure 6 , 7 As shown, from left to right, the conductive terminal 32 is sequentially formed by a clamping section 321 and a mating section 322. The clamping section 321 surrounds or partially surrounds the center conductor 311, and it shrinks when subjected to external force to hold the center conductor 311 tightly. The mating section 322 is provided with a stop limiting unit 3221 and a backstop limiting unit 3222. The stop limiting unit 3221 consists of two stop pieces 32211, both extending from the sidewalls of the mating section 322, and positioned opposite each other. The backstop limiting unit 3222 is separated from the stop limiting unit 3221 by a set distance, and it consists of two backstop fins 32221, both extending from the sidewalls of the mating section 322, and positioned opposite each other. Figure 8 , 9 As shown in Figure 10, an annular limiting step 332 is provided in the inner cavity of the insulating sleeve 33. When the conductive terminal 32 is inserted into the insulating sleeve 33, the annular limiting step 332 abuts against the right side of the stop piece 32211 to limit the axial displacement of the stop piece 32211. Additionally, two opposing limiting notches 333 are provided on the side wall of the insulating sleeve 33. When the conductive terminal 32 is inserted into the insulating sleeve 33, the anti-return fin 32221 is aligned with the limiting notches 333 to limit the axial displacement of the anti-return fin 32221 (e.g., ...). Figure 14 (as shown in the image).

[0033] By adopting the technical scheme, when the conductive terminal 32 is inserted into place relative to the insulating sleeve 33, the annular limiting step 332 abuts against the right side of the stop tab 32211 to limit the axial displacement of the stop tab 32211, and meanwhile, the stop tab 32221 is positioned relative to the limiting notch 333 to limit the axial displacement of the stop tab 32221. In addition, the insulating sleeve 33 is limited in the inner cavity of the metal shielding sleeve 35, and the metal shielding sleeve 35 is connected with the outer sheath layer 314. In this way, on the one hand, the conductive terminal 32 can be effectively ensured to always remain in the correct assembly position relative to the insulating sleeve 33 during the insertion process, thereby avoiding the premature fatigue fracture of the center conductor 311 caused by repeated insertion, and finally the signal transmission process is reliably and stably performed. On the other hand, the insertion difficulty between the conductive terminal 32 and the terminal can also be effectively reduced, and the conductive terminal 32 can always remain in the correct insertion posture relative to the terminal during the insertion process.

[0034] In addition, from the perspective of reducing the difficulty of molding and reducing manufacturing costs, Figure 6 、 7 It can also be seen from the above that, in order to reduce the difficulty of molding and reduce manufacturing costs, the conductive terminal 32 is preferably an integral stamping and bending piece, and the stop tab 32211 is continued from the abutting edge of the conductive terminal 32 and is 90° outwardly bent. The stop tab 32221 is punched from the side wall of the conductive terminal 32 and is directly outwardly bent.

[0035] It is known that the conductive terminal 32 can adopt various design structures to hold the center conductor 311, but a design structure that is simple, easy to mold, and conducive to performing the pressing deformation operation is recommended, as follows: as shown in Figure 6 In the circumferential direction, the clamping section 321 is sequentially connected by the front clamping fin 3211, the clamping section body 3212, and the rear clamping fin 3213. The clamping section body 3212 is used to directly hold the center conductor 311, and the front clamping fin 3211 and the rear clamping fin 3213 are arranged in a half-enclosing manner on both sides of the center conductor 311. When the center conductor 311 is placed in place relative to the conductive terminal 32, the front clamping fin 3211 and the rear clamping fin 3213 are simultaneously subjected to external force to be deformed to hold the center conductor 311.

[0036] In order to ensure that the pre-clamping wing 3211 has enough holding force relative to the center conductor 311 after deformation, and to avoid the center conductor 311 from slipping out of the conductive terminal 32, as a further optimization of the structure of the pre-clamping wing 3211, a pre-moistening groove 32111 is formed on the side opposite to the center conductor 311. The number of pre-moistening grooves 32111 is multiple, and they are linearly arranged along the length extension direction of the pre-clamping wing 3211 (as shown in Figure 6 FIG. 6).

[0037] Similarly to the design of the pre-clamping wing 3211, a post-moistening groove 32131 is formed on the side opposite to the center conductor 311 on the post-clamping wing 3213. The number of post-moistening grooves 32131 is multiple, and they are linearly arranged along the length extension direction of the post-clamping wing 3213 (as shown in Figure 7 FIG. 7).

[0038] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cable assembly comprising a cable, conductive terminals, an insulating sleeve, a shielding mesh gathering sleeve, and a metal shielding sleeve; the cable is formed by sequentially fitting a central conductor, an inner insulating layer, a shielding mesh layer, and an outer sheath layer from the inside out; the conductive terminals are connected to the central conductor and are electrically conductive; the insulating sleeve is fitted around the conductive terminals; the shielding mesh gathering sleeve is fitted around the shielding mesh layer and, when subjected to external force, shrinks to compress the shielding mesh layer; the metal shielding sleeve is fitted around the outer sheath layer, the shielding mesh gathering sleeve, and the insulating sleeve, and, when subjected to external force, shrinks to compress the outer sheath layer, characterized in that... An annular retaining flange extends outward from the outer wall of the insulating sleeve. Correspondingly, an annular retaining step adapted to the annular retaining flange is formed in the inner cavity of the metal shielding sleeve. After the insulating sleeve is inserted into the metal shielding sleeve, the annular retaining step abuts against the annular retaining flange to limit the axial displacement of the insulating sleeve. Along the left-to-right direction, the conductive terminal is sequentially formed by a clamping section and a mating section. The clamping section surrounds or partially surrounds the central conductor, and it shrinks under external force to hold the central conductor firmly. The mating section is provided with a stop-advance limiting unit and a back-advance limiting unit. The stop-advance limiting unit consists of two pieces, both extending from the side of the mating section. The insulating sleeve is composed of two opposing stop plates formed by extending the sidewall of the insert section. The anti-reverse limiting unit is spaced a predetermined distance from the anti-advancing limiting unit and is composed of two opposing anti-reverse retaining wings, each formed by extending the sidewall of the insert section. An annular limiting step is provided within the inner cavity of the insulating sleeve. When the conductive terminal is inserted into the insulating sleeve, the annular limiting step abuts against the right side of the stop plate to limit the axial displacement of the stop plate. Additionally, two opposing limiting notches are provided on the sidewall of the insulating sleeve. When the conductive terminal is inserted into the insulating sleeve, the anti-reverse retaining wings are aligned with the limiting notches to limit the axial displacement of the anti-reverse retaining wings. The conductive terminal is an integral stamped and bent part; the stop piece extends from the mating edge of the conductive terminal and is folded outward at 90°. The anti-reverse wing is formed by punching the side wall of the conductive terminal and bending it directly outward.

2. The cable assembly according to claim 1, characterized in that, Around the circumference, the clamping section is sequentially formed by connecting a front clamping wing, a clamping section body, and a rear clamping wing; the clamping section body is used to directly support the central conductor, while the front clamping wing and the rear clamping wing are arranged in a semi-encircling shape on both sides of the central conductor; when the front clamping wing and the rear clamping wing are simultaneously subjected to external force, they shrink to achieve tight gripping of the central conductor.

3. The cable assembly according to claim 2, characterized in that, On the side opposite to the central conductor, a front friction-enhancing groove is provided on the front clamping wing; the number of the front friction-enhancing grooves is set to multiple, and they are arranged linearly along the length extension direction of the front clamping wing.

4. The cable assembly according to claim 2, characterized in that, On the side opposite to the central conductor, a rear friction-enhancing groove is provided on the rear clamping wing; the number of the rear friction-enhancing grooves is set to multiple, and they are arranged linearly along the length extension direction of the rear clamping wing.

5. A Fakra electrical connector assembly, characterized in that, It includes a Fakra electrical connector male socket, a Fakra electrical connector female socket, and a cable assembly as described in any one of claims 1-4; the cable assembly is built into and fixed within the Fakra electrical connector male socket, and is mated to the Fakra electrical connector female socket as a whole.

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