JP2017208286A - Connector for cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector for a cable which enables reduction of the number of components and the work man-hours while preventing a sealing material for waterproof and dustproof functions from flowing into a connection terminal side.SOLUTION: A connector 100 for a coaxial cable includes: a contact terminal 101 connected with a core wire 11 of a coaxial cable 10; an insulator 102 into which the contact terminal 101 is inserted; a fitting part side shell 103 having shield wire connection parts 103a, which are at least one protrusion piece, are inserted from a tip side of the insulator 102, and are connected with a shield wire 12, at a rear end side; a crimp side shell 104 which crimps and fixes the shield wire 12 and the shield wire connection parts 103a of the fitting part side shell 103 that are engaged with the shield wire 12; and a sealing material 105 which is disposed at a rear end side of the insulator 102 and covers the contact terminal 101, the fitting part side shell 103, the crimp side shell 104, the core wire 11, and the shield wire 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable connector, and more particularly to a cable connector that uses a sealing material for the purpose of waterproofing and dustproofing.

  In recent years, the use of in-vehicle cameras has expanded, and advanced driving support systems (ADAS: Advanced Driver) such as automatic braking and lane keeping for monitoring the periphery of a vehicle such as a back monitor and assisting the driver's field of view. An automobile equipped with an in-vehicle camera for image recognition employed in Assistance System or the like, or for night vision using an infrared camera such as a night vision has become widespread.

  Such an in-vehicle camera is based on an imaging optical system having an optical element such as an imaging lens, an imaging element for acquiring a subject image formed thereby, and an electric signal output from the imaging element An electronic circuit unit that generates digital image data corresponding to the subject image is accommodated in the housing, and a connection cable for transmitting the generated digital image data from the electronic circuit unit inside the housing to the outside is provided. The configuration of the in-vehicle camera module is mainly adopted. It is also known that a digital coaxial cable is used as a connection cable.

  Such a connector for a cable used for connecting a connection cable to a housing of a module such as an in-vehicle camera module is an electronic component housed in the housing due to water or dust entering the inside of the module housing. Is required to be waterproof or dust-proof. Conventional cable connectors have been water-stopped by a rubber cap using water-stopping silicon rubber or the like, or by an adhesive typified by potting or the like, a resin by injection molding, or the like.

JP 2011-154804 A

  In Patent Document 1, an insulator, a connection terminal fitted in a terminal through-hole provided in the insulator, a cable whose tip is crimped to the base of the connection terminal, an insulator and a cable, In a cable connector comprising a bush that integrally molds, a synthetic resin for integral molding is connected from the end of the cable at a position between the tip of the cable and the connection terminal and inside the insulator. A cable connector provided with a stopper for preventing entry so as not to flow into the tip end side of the terminal is described.

  However, when injecting an adhesive or a sealing material such as resin by injection molding as described in Patent Document 1, an anti-flow component such as a stopper is provided so as not to affect the fitting portion of the connector. There is a problem that the number of parts increases, the number of manufacturing steps increases, the cost increases, and when a rubber cap or the like is used, a structure and space for compressing it are required. There is a problem that it is difficult to make the connector small.

  Accordingly, an object of the present invention is to provide a cable connector that can reduce the number of parts and the number of work steps and reduce the cost while preventing the sealing material from flowing in for the purpose of waterproofing and dustproofing.

  In order to solve the above-described problems, a cable connector according to the present invention is connected to a cable including at least one core wire and a shield wire covering an insulating material around the at least one core wire, and is fitted to a receptacle. A connector for a cable, comprising: at least one contact terminal connected to the at least one core wire; an insulator into which the at least one contact terminal is inserted; and at least one protruding piece on the cable side. A fitting portion side shell having a shield wire connecting portion inserted from the receptacle side of the insulator and connected to the shield wire; and the at least one contact terminal, the fitting, disposed on the cable side of the insulator Part-side shell, the at least one core wire, and the seal Characterized in that it comprises a sealing material covering member including a line.

  Moreover, it is good also as what further has the crimping | compression-bonding side shell which fixes the said shield wire and the said shield wire connection part of the said fitting part side shell connected to the said shield wire.

  Moreover, it is good also as what further has the overmold which has the weather resistance formed in the circumference | surroundings of the said sealing material and a cable.

  The sealing material may be formed by hot melt molding.

  Moreover, the said sealing material may engage with the said cable side of the said insulator, and the engaging part for complementing a waterproofing / dustproof function may be provided.

  The cable may be a coaxial cable, and the cable connector may be a coaxial cable connector.

  According to the cable connector of the present invention, the number of parts and work man-hours can be reduced and the cost can be reduced while preventing the flow of the sealing material for the purpose of waterproof / dustproof function.

It is a perspective view which shows a coaxial cable connector as an example of the connector for cables of this invention. 2A is a cross-sectional view taken along line IIa-IIa shown in FIG. 1, and FIG. 2B is a cross-sectional view taken along line IIb-IIb shown in FIG. FIG. 3A is a perspective view showing a process of press-fitting the fitting portion side shell into the insulator, and FIG. 3B shows the shield wire connecting portion of the fitting portion side shell and the shield wire of the coaxial cable inside. It is a perspective view which shows the process of attaching a crimp side shell so that it may enter, and FIG.3 (c) is a perspective view which shows the process of crimping | bonding a crimp side shell. FIG. 4A is a perspective view showing a process of forming a hot melt, and FIG. 4B is a perspective view showing a process of forming an overmold after the hot melt is formed. Fig.5 (a) is a perspective view which shows a contact terminal, FIG.5 (b) is a perspective view which shows a fitting part side shell. 6A is a perspective view showing a state in which the coaxial cable connector is fitted to the in-vehicle camera module, and FIG. 6B is a cross-sectional view taken along line VIb-VIb shown in FIG. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  In addition, the concept of the up-down direction in the following description corresponds to the up-down direction in the attached drawings, and indicates a relative positional relationship between the members, and does not indicate an absolute positional relationship. In the following description, for convenience, the insertion direction of the connector is indicated as “front end”, the reverse direction of the connector insertion direction is indicated as “rear end”, and the left-right direction is a direction orthogonal to the insertion direction of the connector. Indicates “left and right”, but does not indicate an absolute positional relationship.

  FIG. 1 is a perspective view showing a coaxial cable connector 100 as an example of the cable connector of the present invention.

  In FIG. 1, a coaxial cable connector 100 as an example of the cable connector of the present invention is mounted on a mounting board (not shown) provided in an in-vehicle camera module 1000 shown in FIG. The receptacle 1020 is fitted. Here, for convenience of explanation, the plug-side connector is referred to as a connector, and the receptacle-side connector is referred to as a receptacle. Although an example in which the coaxial cable connector 100 is applied to the in-vehicle camera module 1000 will be described here, the present invention is not limited to this, and any product that requires a waterproof / dustproof function can be applied. The in-vehicle camera module 1000 accommodates a cable side case 1010 having a structure connected to the coaxial cable 10 and a camera module (not shown) inside, and a mounting board (not shown) on which the receptacle 1020 is mounted. ) Is disposed on the module side case (not shown). The cable side case 1010 and the module side case are fixed by, for example, screwing or the like, but is not limited to this method.

  2A is a cross-sectional view taken along line IIa-IIa shown in FIG. 1, and FIG. 2B is a cross-sectional view taken along line IIb-IIb shown in FIG.

  1, FIG. 2A and FIG. 2B, a coaxial cable connector 100 includes a core wire 11, a shield wire 12 covering the periphery of the core wire 11 with an insulating material 11a, and a shield wire 12. It is connected to a coaxial cable 10 for digital transmission having a covering 12a. Here, the cable connector of the present invention will be described by taking the coaxial cable connector 100 as an example and connecting it to the coaxial cable 10 for digital transmission. However, the present invention is not limited to this, and a waterproof / dustproof function is provided. It can also be applied to analog transmission coaxial cables or multi-core cables for high-speed transmission that have a plurality of high-speed signal lines and have shield wires that cover the signal lines with an insulating material around them. .

  The coaxial cable connector 100 includes a contact terminal 101 crimped to the core wire 11 of the coaxial cable 10, an insulator 102 in which the contact terminal 101 is press-fitted and held, and a press-fit from the tip end side of the insulator 102, and is connected to the shield wire 12. Crimping side for crimping and fixing the fitting portion side shell 103 having the shielded wire connecting portion 103a, the shielded wire 12, and the shielded wire connecting portion 103a of the fitting portion side shell 103 connected to the shielded wire 12 A shell 104 and a hot melt 105 disposed on the rear end side of the insulator 102 and covering a conductive member including the contact terminal 101, the fitting portion side shell 103, the crimping side shell 104, the core wire 11, and the shield wire 12. The overmold 106 is molded after the hot melt 105 is formed. , And a O-ring 107 disposed on the distal end side of the insulator 102.

  The contact terminal 101 is made of a conductive metal material such as copper plated with gold, and has a substantially cylindrical shape as shown in FIG. In the contact terminal 101, the core wire 11 of the coaxial cable 10 is inserted at the rear end, and the contact terminal 101 is described later on the insulator 102 in the vicinity of the center between the cylindrical portion 101a to be crimped and the front end and rear end of the column. A flange portion 101b is formed to be locked when it is press-fitted into the through hole 102d from the rear end side.

  The insulator 102 is formed of, for example, an insulating material such as resin and has a substantially cylindrical shape. On the rear end side, a flange portion 102c having two protruding portions 102b each provided with a screw hole 102a is provided. ing. The insulator 102 includes a through-hole 102d into which the contact terminal 101 is press-fitted at the center of the column, a cylindrical fitting recess 102e for fitting with a receptacle 1020, which will be described later, and a fitting recess 102e. Two insertion ports 102f provided around the through hole 102d and into which the two shielded wire connection portions 103a of the fitting portion side shell 103 are press-fitted, and a hot melt 105 and an overmold on the rear end side of the flange portion 102c. An O-ring 107 is arranged around a disc-shaped engaging portion 102h having two engaging holes 102g for engaging with the water 106 and complementing the waterproof / dustproof function, and a cylindrical portion on the distal end side of the flange portion 102c. An annular groove 102i is formed.

  The shape of the insulator 102 is not limited to the shape of the present embodiment. For example, when screwing is not performed at two locations but is performed at a plurality of locations, the screwing holes 102a and the protrusions 102b may be provided at a plurality of locations, and when screwing is not necessary, they may not be provided. Good. In addition, in the case where the plurality of shield wire connection portions 103a are provided in the fitting portion side shell 103, the insertion port 102f may be provided at a plurality of locations according to the number of the shield wire connection portions 103a. Further, the shape of the disc-shaped engaging portion 102h having the two engaging holes 102g may be any shape that engages with the hot melt 105 and complements the waterproof / dustproof function.

  The fitting portion side shell 103 is formed of a conductive metal material such as a copper thin plate made of gold, and has a substantially cylindrical shape as shown in FIG. On the rear end side, there are two projecting pieces, which are press-fitted from the front end side of the insertion port 102 f of the insulator 102 and provided with a shield wire connecting portion 103 a connected to the shield wire 12. Further, a guide portion 103b, which is a plurality of projecting portions that are obliquely expanded and bent, is provided on the distal end side of the fitting portion side shell 103 to guide the receptacle 1020 when the connector is fitted.

  The crimp-side shell 104 is formed of a metal material such as copper, and as shown in FIGS. 3B and 3C described later, the shield wire 12 and the shield wire 12 are formed on the tip side. A shield wire fixing portion 104a, which is two projecting pieces for crimping and fixing the shield wire connecting portion 103a of the connected fitting portion side shell 103, is provided, and the outermost layer coating of the coaxial cable 10 is provided on the rear end side. A coaxial cable fixing portion 104b, which is two protruding pieces for fixing 12a by pressure bonding, is provided. In this way, the shield wire fixing portion 104a is fixed by crimping the shield wire 12 and the shield wire connecting portion 103a, and the coaxial cable fixing portion 104b is fixed by pressing the covering 12a. The tensile strength between the cable 10 and the coaxial cable connector 100 is increased. Further, the shape of the crimp-side shell 104 including the shield wire fixing portion 104a and the coaxial cable fixing portion 104b is not limited to the shape of the present embodiment.

  Here, the hot melt 105 is formed by hot melt molding using, for example, nylon resin or polyester resin, but is not limited to this, and other materials such as adhesive and resin molding are used. It doesn't matter. After the crimp-side shell 104 is crimped and fixed, the hot melt 105 is a contact terminal 101, a fitting-portion-side shell 103, and a crimp-side shell 104 that are conductive members that appear on the rear end side of the flange portion 102 c of the insulator 102. And the core wire 11 and the shield wire 12 of the coaxial cable 10 are provided to fix the waterproof and dustproof functions. At this time, since the shield wire connecting portion 103a and the contact terminal 101 of the fitting portion side shell 103 are fixed to the insulator 102 by press-fitting, the hot melt 105 as a sealing material is fitted from the rear end side to the front end side. The waterproof / dustproof function can be achieved without flowing into the mating recess 102e and without increasing the number of parts and the number of work steps. Further, since the hot melt 105 engages with the disk-shaped engaging portion 102h having two engaging holes 102g provided on the rear end side of the flange portion 102c of the insulator 102, the waterproof / dustproof function is further enhanced. Can do.

  The overmold 106 is formed of a material having weather resistance such as a resin, and is formed by overmolding after the hot melt 105 is formed. The overmold 106 is formed so as to protect the periphery of the coaxial cable 10 and the hot melt 105. Further, a part of the tip side of the overmold 106 is engaged with the disk-shaped engaging portion 102h of the above-described insulator 102, thereby increasing the tensile strength and the like. The overmold 106 does not need to be provided when a material having weather resistance is used as the hot melt 105. In this case, the hot melt 105 is the outermost layer of the coaxial cable connector 100.

  The O-ring 107 is made of a material such as silicon, and is formed in an annular shape. The O-ring 107 is disposed in an annular groove 102i provided on the distal end side of the flange portion 102c of the insulator 102, and has a waterproof / dustproof function between the coaxial cable connector 100 and the cable-side case 1010 of the in-vehicle camera module 1000. Fulfill.

  Next, the manufacturing process of the cable connector of the present invention will be described.

  First, the contact terminal 101 is press-fitted into the through hole 102d of the insulator 102 from the rear end side. At this time, the flange portion 101b of the contact terminal 101 is engaged inside the through hole 102d of the insulator 102, and when the hot melt 105 is formed on the rear end side, the hot melt 105 etc. The sealing material is prevented from flowing. Next, the core wire 11 located at the center of the coaxial cable 10 with the insulating material 11a removed is inserted into the cylindrical portion 101a provided at the rear end of the contact terminal 101, and then crimped so as to crush the cylindrical portion 101a.

  FIG. 3A is a perspective view showing a process of press-fitting the fitting portion side shell 103 into the insulator 102, and FIG. 3B is a diagram showing the shielded wire connecting portion 103 a of the fitting portion side shell 103 and the coaxial cable 10. FIG. 3C is a perspective view showing a process of attaching the crimping side shell 104 so that the shield wire 12 enters inside, and FIG. 3C is a perspective view showing a process of crimping the crimping side shell 104.

  As shown in FIG. 3A, the two shield wire connecting portions 103a of the fitting portion side shell 103 are press-fitted into the distal end sides of the two insertion ports 102f of the insulator 102. At this time, since there is a flat portion between the plurality of guide portions 103b provided on the front end side of the fitting portion side shell 103, a tool or the like can be applied to the flat portion, and the fitting portion side can be easily The shell 103 can be press-fitted. Further, since the shield wire connecting portion 103a is press-fitted into the insertion port 102f of the insulator 102, no gap is formed, and when the hot melt 105 described later is formed on the rear end side, the hot melt 105 is inserted into the fitting recess 102e on the front end side. The sealing material such as can be prevented from flowing.

  Next, as shown in FIG. 3B, the crimping side shell 104 is attached so that the shielded wire connecting portion 103a of the fitting portion side shell 103 and the shielded wire 12 of the coaxial cable 10 enter inside. Thereafter, as shown in FIG. 3C, the crimping side shell 104 is crimped. At this time, the shield wire fixing portion 104a crimps the shield wire 12 and the shield wire connecting portion 103a, and the coaxial cable fixing portion 104b crimps the coating 12a of the coaxial cable 10. The shield wire fixing portion 104a and the coaxial cable fixing portion 104b have two columnar shapes on the front end side and the rear end side as shown in FIG.

  FIG. 4A is a perspective view illustrating a process of forming the hot melt 105, and FIG. 4B is a perspective view illustrating a process of forming the overmold 106 after the hot melt 105 is formed.

  As shown in FIG. 4A, the hot melt 105 is formed by hot melt molding. Here, as the sealing material for achieving the waterproof / dustproof function, the hot melt 105 is formed by hot melt molding. However, the present invention is not limited to this, and other seals such as an adhesive are used. Materials may be used. The shape of the hot melt 105 is not limited to the shape of the present embodiment, and various shapes can be applied. Next, as shown in FIG. 4B, after the hot melt 105 is formed, an overmold 106 is formed around the hot melt 105 and the coaxial cable 10 by overmolding. The shape of the overmold 106 is not limited to the shape of the present embodiment, and various shapes can be applied. In addition, when a material having weather resistance is used as the hot melt 105, it is not necessary to provide the overmold 106.

  As described above, the coaxial cable connector 100 shown in FIG. Here, the coaxial cable connector 100 connected to the coaxial cable 10 has been described as an example, but the present invention may be applied to a multicore cable connector connected to a multicore cable having a plurality of core wires. In this case, there are a plurality of contact terminals 101 connected to a plurality of core wires. Next, the shape of a single main component will be described.

  FIG. 5A is a perspective view showing the contact terminal 101, and FIG. 5B is a perspective view showing the fitting portion side shell 103.

  In FIG. 5A, the contact terminal 101 has a substantially columnar shape. The core portion 11a of the coaxial cable 10 is inserted into the rear end of the contact terminal 101 and is crimped, and between the front end and the rear end of the column. Near the center is formed a flange portion 101b that is locked when the contact terminal 101 is press-fitted into the through hole 102d of the insulator 102 from the rear end side. In addition, the shape of the contact terminal 101 is not limited to the shape of this embodiment, can be connected to the core wire 11, is press-fitted into the insulator 102, and a sealing material such as hot melt 105 is provided from the rear end side to the front end side of the insulator 102. Any shape that does not flow in may be used.

  In FIG. 5B, the fitting portion side shell 103 has a substantially cylindrical shape, and is two projecting pieces on the rear end side of the cylindrical shape, and is press-fitted from the front end side of the insertion port 102 f of the insulator 102. , A shield wire connection portion 103a connected to the shield wire 12 is provided. In addition, a guide portion 103b, which is a plurality of projecting portions that are obliquely expanded and bent, is provided on the distal end side of the fitting portion side shell 103 to guide the receptacle 1020 when the fitting portion side shell 103 is fitted. In addition, the shape of the guide part 103b is not limited to the shape of this embodiment. Further, the shape of the fitting portion side shell 103 is not limited to the shape of the present embodiment. For example, when applied to a quadrangular or hexagonal tubular shape, or a multi-core cable, the shape of the elongated rectangular shape or the elliptical shape. A cylindrical shape etc. may be sufficient. Here, two shield wire connection portions 103a are provided. However, the present invention is not limited to this, and a plurality of locations other than the two locations may have a poor balance, but may be provided at one location.

  FIG. 6A is a perspective view showing a state in which the coaxial cable connector 100 is fitted to the in-vehicle camera module 1000, and FIG. 6B is along the line VIb-VIb shown in FIG. FIG.

  6B, a receptacle 1020 includes a receptacle contact terminal 1021 that is electrically contacted with the contact terminal 101 of the coaxial cable connector 100 when the connector is fitted, and a receptacle that insulates and holds the periphery of the receptacle contact terminal 1021. An insulator 1022 and a receptacle GND 1023 disposed around the receptacle insulator 1022 and electrically contacted with the fitting portion side shell 103 when the connector is fitted are provided. Note that the shape of the receptacle 1020 is not limited to the shape of the present embodiment.

  6A and 6B, the coaxial cable connector 100 is fixed to the cable side case 1010 of the in-vehicle camera module 1000 by screwing or the like. The coaxial cable connector 100 of the present embodiment is a combination of a module side case (not shown) on which a mounting board (not shown) on which a receptacle 1020 is mounted and a cable side case 1010 are combined. It is assumed that the vehicle-mounted camera module 1000 is directly fitted. At this time, the mounting error in the left-right direction can be absorbed by increasing the diameter of the screwing hole 102 a of the insulator 102. Further, the mounting error in the vertical direction can be absorbed by the fitting stroke of the contact terminal 101 and the fitting portion side shell 103 of the coaxial cable connector 100 and the receptacle contact terminal 1021 and the receptacle GND 1023 of the receptacle 1020.

  As described above, the cable connector of the present invention has been described mainly using the coaxial cable connector 100 as an example. However, as described above, it can be connected to a multi-core cable with a shielded wire other than the coaxial cable. It can be applied to all cable connectors that require waterproof and dustproof functions.

  As described above, according to the cable connector of the present invention, the number of parts and work man-hours can be reduced and the cost can be reduced while preventing the sealing material from flowing in for the purpose of waterproof and dustproof functions.

DESCRIPTION OF SYMBOLS 10 Coaxial cable 11 Core wire 11a Insulation material 12 Shield wire 12a Coating | cover 100 Connector for coaxial cables 101 Contact terminal 101a Cylindrical part 101b, 102c Flange part 102 Insulator 102a Screwing hole 102b Protrusion part 102d Through-hole 102e Fitting recessed part 102f Insertion opening 102g Engagement Joint hole 102h Disc-shaped engaging portion 102i Annular groove 103 Fitting portion side shell 103a Shield wire connecting portion 103b Guide portion 104 Crimp side shell 104a Shield wire fixing portion 104b Coaxial cable fixing portion 105 Hot melt 106 Overmold 107 O-ring 1000 In-vehicle camera module 1010 Cable side case 1020 Receptacle 1021 Receptacle contact terminal 1022 Receptacle insulator 10 23 Receptacle GND

Claims (6)

A cable connector that is connected to a cable having at least one core wire and a shield wire that covers the periphery of the at least one core wire via an insulating material and is fitted to a receptacle,
At least one contact terminal connected to the at least one core wire;
An insulator into which the at least one contact terminal is inserted;
On the cable side, there is at least one protruding piece, inserted from the receptacle side of the insulator, and a fitting portion side shell having a shield wire connecting portion connected to the shield wire;
A cable connector comprising: a sealing material disposed on the cable side of the insulator and covering the member including the at least one contact terminal, the fitting portion side shell, the at least one core wire, and the shield wire.   The cable connector according to claim 1, further comprising a crimp-side shell that fixes the shielded wire and the shielded wire connecting portion of the fitting portion-side shell connected to the shielded wire.   The cable connector according to claim 1, further comprising an overmold having weather resistance formed around the sealing material and the cable.   The cable connector according to claim 1, wherein the sealing material is formed by hot melt molding.   2. The cable connector according to claim 1, wherein an engagement portion is provided on the cable side of the insulator to engage the sealing material and supplement a waterproof / dustproof function.   The cable connector according to claim 1, wherein the cable is a coaxial cable, and the cable connector is a coaxial cable connector.

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