JP6958589B2 - Electrical connector - Google Patents

Description

The present invention relates to an electrical connector that connects to a cable comprising a plurality of electric wires each composed of an inner conductor and an internal insulator covering the inner conductor, and an external insulator covering the plurality of electric wires.

Conventionally, an electric connector for connecting to a cable containing a plurality of electric wires is known. In such an electric connector, in order to connect a plurality of electric wires contained in the cable to the conductive terminals by crimping or the like, it is necessary to remove the outer skin covering the plurality of electric wires to expose them to the outside. Further, such an electric connector does not have a configuration for restricting the movement of a plurality of externally exposed electric wires when connected to a cable, and a plurality of externally exposed electric wires are fixed with tape or the like. Some have a structure, and some have a structure in which a plurality of electric wires exposed to the outside are fixed in advance with tape or the like and assembled. Further, in such an electric connector, the characteristic impedance is adjusted by appropriately arranging the internal core wires of a plurality of electric wires included in the connected cable, and good transmission characteristics are realized.

However, an electric connector that does not have a configuration for restricting the movement of a plurality of electric wires exposed to the outside has a gap between the plurality of electric wires, and the distance between the internal core wires changes, so that the characteristic impedance increases. Invite. Further, an electric connector having a structure in which a plurality of electric wires exposed to the outside are fixed with a tape or the like and an electric connector having a structure in which a plurality of electric wires exposed to the outside are fixed in advance with a tape or the like and assembled are poor in assembling property. ..

In such a situation, Patent Document 1 discloses a cable alignment component including a plurality of first groove portions and a plurality of second groove portions that can each accept a plurality of single cables connected to the electric wire connection portion of the substrate. Patent Document 2 also discloses a plug connector that accepts a portion of a twisted pair cable jacket in which cable conductors, each covered by an insulating jacket, are twisted in pairs in at least one of the housing compartments.

Japanese Unexamined Patent Publication No. 2014-127460 Special Table 2016-524299

However, in Patent Document 1, a plurality of single cables including a pair of signal lines are arranged, and the distance between the signal conductors of the pair of signal lines is maintained by an internal shield covering the pair of signal lines. NS. Further, Patent Document 2 does not have a configuration for restricting the movement of the wire rod exposed from the jacket. Therefore, in Patent Document 1 and Patent Document 2, when an internal shield or an external insulator such as a jacket is removed to expose an internal electric wire such as a pair of signal wires or wires, between the core wires of the internal electric wire. There is a problem that the characteristic impedance cannot be adjusted by maintaining the distance between the two and the above, and good transmission characteristics cannot be obtained.

An object of the present invention is to provide an electric connector capable of obtaining good transmission characteristics by removing an external insulator and suppressing a change in the characteristic impedance of a plurality of electric wires exposed to the outside. ..

The electric connector according to the present invention is connected to a cable including a plurality of electric wires each composed of an internal conductor and an internal insulator covering the internal conductor, and an external insulator covering the plurality of electric wires. A plurality of electrically conductive terminals that are electrically connected to the inner conductors of the plurality of electric wires, and a fitting portion in which the plurality of terminals are arranged and fitted with a mating connector. A terminal holding portion provided behind the fitting portion and holding the terminal and a plurality of electric wires provided behind the terminal holding portion and exposed from which the external insulator has been removed are brought into close contact with each other in the left-right direction. It has an insulating housing including an electric wire holding portion that aligns and holds the electric wires in a state of being aligned, and the electric wire holding portion is spaced along a front-rear direction from a concave groove into which the plurality of electric wires can be inserted. A plurality of ribs provided at the front end and the rear end of the concave groove, between the front end and the rear end, and protruding from the inner wall of the concave groove and in contact with the internal insulator. The plurality of ribs have the same distance between the plurality of electric wires inserted in the concave groove as when they are included in the cable, and the plurality of electric wires inserted in the concave groove have the same distance as when the electric wires are included in the cable. Since the pressing force from the plurality of ribs is absorbed only by the internal insulator and the pressing force from the plurality of ribs does not reach the internal conductor, the distance between the internal conductors does not change .

When a plurality of exposed electric wires from which the external insulator is removed are held by the electric wire holding portion, the distance between the internal conductors of the plurality of electric wires is set to an appropriate distance to suppress the change in the characteristic impedance.

According to the present invention, good transmission characteristics can be obtained by removing the external insulator and suppressing the change in the characteristic impedance of the plurality of electric wires exposed to the outside.

It is an exploded perspective view of the electric connector which concerns on embodiment of this invention. It is a side view of the electric connector which concerns on embodiment of this invention. It is a rear view of the electric connector which concerns on embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a top view of the holder of the electric connector which concerns on embodiment of this invention. It is a rear view of the holder of the electric connector which concerns on embodiment of this invention. It is a bottom view of the cover of the electric connector which concerns on embodiment of this invention. It is a figure which shows the relationship between the holder of the electric connector which concerns on embodiment of this invention, and an electric wire. It is a top view of the holder of the modification of the electric connector which concerns on embodiment of this invention. It is a figure which shows the relationship between the holder and the electric wire of the modification of the electric connector which concerns on embodiment of this invention.

Hereinafter, the electric connector according to the embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the figure, the x-axis, y-axis, and z-axis form a three-axis Cartesian coordinate system, with the positive direction of the y-axis being the forward direction, the negative direction of the y-axis being the backward direction, the positive direction of the x-axis being the left direction, and x. The negative direction of the axis will be described as the right direction, the positive direction of the z-axis will be described as the upward direction, and the negative direction of the z-axis will be described as the downward direction.

<Electrical connector configuration>
The configuration of the electric connector 1 according to the embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 8.

The electric connector 1 is connected to the cable 100. Here, the cable 100 includes a pair of electric wires 103 each composed of an inner conductor 101 and an internal insulator 102 covering the inner conductor 101, and an outer insulator 104 covering the pair of electric wires 103. There is. Further, the pair of electric wires 103 are covered with the external insulator 104 in a state of being closely aligned with each other in the left-right direction, and can be separated when the external insulator 104 is removed. The cable 100 is not limited to a configuration that includes a pair of electric wires 103, and may have a configuration that includes three or more electric wires that are in close contact with each other.

Specifically, the electric connector 1 includes a case main body 10, a shield case 20, a plurality of terminals 30, a cover 40, and a holder 50. Here, the case body 10, the cover 40, and the holder 50 form a housing.

The case body 10 is made of an insulating material, and has a rectangular shape and a cylindrical shape. The case body 10 has a fitting portion 11 that communicates with the front end opening 12 and fits with a mating connector (not shown), a front end opening 12 that opens the hollow interior forward, and a hollow interior that opens rearward. It is provided with a rear end opening 13 and a holding groove 14 extending in the front-rear direction and having a rear end communicating with the fitting portion 11.

The shield case 20 is formed by bending a metal plate. The shield case 20 includes a main body portion 21, a protruding portion 22, a connecting portion 23, and a crimping portion 24.

The main body 21 houses the cover 40 and the holder 50, which will be described later.

The protruding portion 22 projects forward from the front ends of the left and right side surfaces of the main body portion 21 and is inserted into the holding groove 14 of the case main body 10 to restrict the case main body 10 from moving forward of the shield case 20. There is.

The connecting portion 23 is formed by being cut up from the protruding portion 22 inward, and protrudes into the fitting portion 11 in a state of being elastically deformable. The connecting portion 23 is elastically deformed and connected to a shield member of a mating connector (not shown) that fits into the fitting portion 11.

The crimping portion 24 extends rearward from the rear end of the main body portion 21 and is crimped to the external insulator 104 of the cable 100.

The plurality of terminals 30 are made of a conductive material and are connected to the inner conductors 101 of each of the pair of electric wires 103. The plurality of terminals 30 include a connecting portion 31, a locking portion 32, and a crimping portion 33.

The connecting portion 31 is arranged in the fitting portion 11.

A pair of locking portions 32 are provided between the connecting portion 31 and the crimping portion 33, and are cut up to the outside side.

The crimping portion 33 is crimped to the inner conductor 101 of the cable 100.

The cover 40 is made of an insulating material and holds a plurality of terminals 30 and a pair of electric wires 103 of the cable 100 between the cover 40 and the holder 50. The cover 40 includes a front protrusion 41, a rear protrusion 42, and a flat portion 43.

The front protrusion 41 projects downward from the flat portion 43.

The rear protrusion 42 is provided behind the front protrusion 41 and projects downward from the flat portion 43.

The flat portion 43 is flat along the xy plane and covers the upper part of the holder 50.

The holder 50 is made of an insulating material and holds a plurality of terminals 30 and a pair of electric wires 103. The holder 50 includes a terminal holding portion 51, an electric wire holding portion 52, a branch portion 53, a crimping portion holding portion 54, a locking groove 55, a chamfered portion 56, a front engaging groove 57, and a rear engaging groove. It is equipped with 58.

The terminal holding portion 51 is provided behind the fitting portion 11 and is a concave groove that holds the pair of terminals 30 apart from each other.

The electric wire holding portion 52 is provided behind the terminal holding portion 51 and the branch portion 53, and holds a pair of electric wires 103 exposed by removing the external insulator 104 in a state of being in close contact with each other in the left-right direction. The electric wire holding portion 52 is provided with a concave groove 521 into which a pair of electric wires 103 can be inserted at a distance along the front-rear direction, and protrudes from the inner wall of the concave groove 521 and is in contact with the internal insulator 102 of the cable 100. It is provided with a plurality of ribs 522 in contact with each other. The inner wall of the groove 521 does not come into contact with the internal insulator 102 of the cable 100.

Here, as shown in FIG. 8, the left-right distance L2 of the portion where the rib 522 of the concave groove 521 is provided when viewed from above does not provide the rib 522 of the concave groove 521 when viewed from above. The distance between the portions in the left-right direction is smaller than L1 (L1> L2). Further, the rib 522 has a distance L4 (see FIG. 5) in the front-rear direction 10 times or less (L4 ≦ (10 × R1)) of the outer diameter R1 of the single electric wire 103, and the outer diameter R1 or more of the single electric wire 103. (R1 ≦ L4), or the wire holding portion 52 so that the outer diameter R1 of the single wire 103 is 10 times or less and the outer diameter R1 or more of the single wire 103 (R1 ≦ L4 ≦ (10 × R1)). It is preferable that the cable is provided in. The ribs 522 are provided in the electric wire holding portion 52 at intervals of 8.2 mm (L4 = 8.2 mm), for example, when the outer diameter R1 of the single electric wire 103 is 0.82 mm.

The rib 522 is configured to press the internal insulator 102 of the pair of electric wires 103 and to absorb the pressing force on the internal insulator 102 by the internal insulator 102.

The branch portion 53 communicates with the terminal holding portion 51 and is provided between the terminal holding portion 51 and the electric wire holding portion 52, and is a concave groove for holding the pair of branched electric wires 103. The branch portion 53 is provided so as to have a predetermined angle with respect to the front-rear direction and extend outward toward the front.

The crimping portion holding portion 54 is provided between the terminal holding portion 51 and the branch portion 53, and is a concave groove for holding the crimping portion 33.

The locking groove 55 locks the locking portion 32 of the terminal 30 and restricts the movement of the terminal 30 with respect to the holder 50 in the front-rear direction.

The chamfered portion 56 is formed by chamfering the left and right side surface portions so that the width of the holder 50 in the left-right direction gradually narrows toward the rear when viewed from above.

The front engaging groove 57 is engaged with the front protrusion 41 of the cover 40.

The rear engaging groove 58 is provided behind the front engaging groove 57 and engages with the rear protrusion 42 of the cover 40.

<Manufacturing method of electrical connector>
The method for manufacturing the electric connector 1 according to the embodiment of the present invention will be described in detail below.

First, after inserting the cable 100 into the shield case 20, the external insulator 104 at the front end of the cable 100 is removed to expose the pair of electric wires 103 , and the internal insulator 102 at the front end of the exposed pair of electric wires 103 is exposed. Each is removed to expose each of the inner conductors 101.

Next, the exposed inner conductors 101 of the pair of electric wires 103 are crimped at the crimping portions 33 of the plurality of terminals 30, respectively, to connect the inner conductors 101 and the terminals 30.

Next, the locking portion 32 of the terminal 30 is locked in the locking groove 55 of the terminal holding portion 51 of the holder 50, and the terminal holding portion 51 holds the terminal 30.

Further, the electric wire holding portion 52 of the holder 50 holds a pair of electric wires 103 in a state of being aligned in the left-right direction.

At this time, as shown in FIG. 8, the width L3 in the left-right direction when the pair of electric wires 103 are aligned in the left-right direction is twice the outer diameter R1 of the electric wire 103 (L3 = 2 × R1). ). Further, the width L3 is larger than the interval L2 (L2 <L3) and smaller than the interval L1 (L1> L3). Therefore, in the pair of electric wires 103, the internal insulator 102 does not abut on the inner wall of the concave groove 521, while the internal insulator 102 abuts on the rib 522 and is held by the electric wire holding portion 52.

As a result, the internal insulator 102 does not receive the pressing force and frictional force from the inner wall of the concave groove 521 and only receives light interference from the rib 522, and the pair of electric wires 103 can be easily inserted into the electric wire holding portion 52. Since the cover 40 can be easily attached to the holder 50, it is possible to realize assembly with a small load and a low load. A pair of wires 103 is held in the wire holding portion 52 absorbs the pressing force from the rib 522 only within the insulator 102, by the pressing force from the rib 522 does not extend to the inner conductor 101, inner Since the rib 522 receives a pressing force that does not change the distance between the conductors 101, good transmission characteristics can be obtained without adversely affecting the characteristic impedance.

Further, by providing the ribs 522 in the electric wire holding portion 52 at intervals along the front-rear direction, it is possible to prevent a gap from being generated between the pair of electric wires 103, and the ribs 522 are aligned in close contact with each other in the left-right direction. Since the pair of electric wires 103 can be held by the electric wire holding portion 52 and the distance between the pair of electric wires 103 can be made substantially the same as when the pair of electric wires 103 is included in the cable 100, the characteristic impedance is adversely affected. Good transmission characteristics can be obtained without exerting any effect.

In particular, by providing the rib 522 in the wire holding portion 52 so that the interval L4 shown in FIG. 5 is 10 times or less the outer diameter R1 of the single wire 103, the pair of wires 103 can be formed between the adjacent ribs 522. Since it is possible to reliably prevent bending and forming a gap between the pair of electric wires 103, the characteristic impedance can be maintained appropriately. Further, by providing the rib 522 in the electric wire holding portion 52 so that the interval L4 is equal to or larger than the outer diameter R1 of the single electric wire 103, the pair of electric wires 103 can be easily inserted into the electric wire holding portion 52. Further, by providing the rib 522 in the electric wire holding portion 52 so that the interval L4 is 10 times or less the outer diameter R1 of the single electric wire 103 and the outer diameter R1 or more of the single electric wire 103, the pair of electric wires 103 can be formed. It is possible to achieve both the effect of being easily inserted into the electric wire holding portion 52 and the effect of obtaining good transmission characteristics without adversely affecting the characteristic impedance.

Next, the cover 40 is put on the holder 50 holding the terminal 30 and the pair of electric wires 103, the front protrusion 41 of the cover 40 is engaged with the front engaging groove 57 of the holder 50, and the rear of the cover 40. The protrusion 42 is engaged with the rear engaging groove 58 of the holder 50 to integrate the cover 40 and the holder 50. At this time, by covering the terminal holding portion 51, the electric wire holding portion 52, and the branch portion 53 from above with the flat portion 43 of the cover 40, a state in which a plurality of terminals 30 are held by the terminal holding portion 51, and a pair of electric wires 103. Is held by the electric wire holding portion 52, and the plurality of terminals 30 and the pair of electric wires 103 are held between the cover 40 and the holder 50.

Next, the crimping portion 24 of the shield case 20 is crimped to the external insulator 104 of the cable 100, and the cable 100 is fixed to the shield case 20. Thereby, the rearward movement of the cover 40 and the holder 50 with respect to the shield case 20 can be regulated by the shield case 20.

Next, by inserting the shield case 20 forward from the rear end opening 13 of the case body 10, the protruding portion 22 of the shield case 20 is inserted into the holding groove 14 of the case body 10 with respect to the case body 10. The forward movement of the shield case 20 is restricted.

As described above, according to the present embodiment, the external insulator 104 is removed by holding the plurality of electric wires 103 exposed by removing the external insulator 104 in close contact with each other in the left-right direction. Changes in the characteristic impedance of the plurality of electric wires 103 exposed to the outside can be suppressed, and good transmission characteristics can be obtained.

(Other embodiments)
The configuration of the electric connector according to another embodiment of the present invention will be described in detail below with reference to FIGS. 9 and 10.

In FIGS. 9 and 10, the parts having the same configuration as those in FIGS. 1 to 8 are designated by the same reference numerals, and the description thereof will be omitted. Further, since the electric connector according to another embodiment of the present invention has the same configuration as the electric connector 1 except that the holder 60 is provided in place of the holder 50 in the above electric connector 1, the configuration other than the holder 60 will be described. Omit.

The holder 60 is made of an insulating material and holds a plurality of terminals 30 and a pair of electric wires 103. The holder 60 includes a terminal holding portion 51, a branch portion 53, a crimping portion holding portion 54, a locking groove 55, a chamfered portion 56, and an electric wire holding portion 62.

The electric wire holding portion 62 is provided behind the terminal holding portion 51 and the branch portion 53, and has a concave shape in which a pair of electric wires 103 exposed by removing the external insulator 104 are aligned and held in close contact with each other in the left-right direction. It is a groove of.

Here, the distance L5 (see FIG. 10) in the left-right direction of the electric wire holding portion 62 when viewed from above is smaller than the distance L3 (L3> L5). Therefore, in the pair of electric wires 103, the internal insulator 102 abuts on the inner wall portion of the electric wire holding portion 62 and is held by the electric wire holding portion 62.

Further, the pair of electric wires 103 held by the electric wire holding portion 62 absorb the pressing force from the inner wall portion of the electric wire holding portion 62 only by the internal insulator 102 and do not reach the internal conductor 101. As a result, the pair of electric wires 103 receives a pressing force from the inner wall of the electric wire holding portion 62 to the extent that the distance between the internal conductors 101 does not change, so that the characteristic impedance is not adversely affected and good transmission characteristics can be obtained. can.

Further, it is possible to prevent a gap from being formed between the pair of electric wires 103 by the inner wall portion of the electric wire holding portion 62, and the pair of electric wires 103 are held in the electric wire holding portion 62 by aligning them in close contact with each other in the left-right direction. In addition, since the pair of electric wires 103 can be in substantially the same state as when they are included in the cable 100, good transmission characteristics can be obtained without adversely affecting the characteristic impedance.

As described above, according to the other embodiment, the external insulator 104 is removed by aligning and holding the plurality of electric wires 103 exposed by removing the external insulator 104 in close contact with each other in the left-right direction. Therefore, it is possible to suppress a change in the characteristic impedance of the plurality of electric wires 103 in a state of being exposed to the outside, and it is possible to obtain good transmission characteristics.

The present invention is not limited to the above-described embodiment in terms of the type, arrangement, number, etc. of the members, and the constituent elements thereof are appropriately replaced with those having the same effect and effect, as long as the gist of the invention is not deviated. Of course, it can be changed as appropriate.

Specifically, in the above embodiment, the shield case 20 may not be provided.

Further, in the above embodiment, the case body 10, the cover 40, and the holder 50 are provided, but the housing can be divided into upper and lower parts, and the upper housing includes the same structure as the cover 40, and the lower side. The housing may include the same configuration as the holder 50.

The electrical connector according to the present invention connects to a cable including a plurality of electric wires each composed of an internal conductor and an internal insulator covering the internal conductor, and an external insulator covering the plurality of electric wires. Suitable.

1 Electric connector 10 Case body 11 Fitting part 12 Front end opening 13 Rear end opening 14 Holding groove 20 Shield case 21 Main body 22 Protruding part 23 Connection part 24 Crimping part 30 Terminal 31 Connection part 32 Locking part 33 Crimping part 40 Cover 41 Front protrusion 42 Rear protrusion 43 Flat part 50 Holder 51 Terminal holding part 52 Wire holding part 53 Branching part 54 Crimping part holding part 55 Locking groove 56 Chamfering part 57 Front engaging groove 58 Rear engaging groove 60 Holder 62 Electric wire holding part 100 Cable 101 Internal conductor 102 Internal insulator 103 Electric wire 104 External insulator 521 Concave groove 522 Rib

Claims (3)

An electrical connector for connecting to a cable, each comprising a plurality of electric wires composed of an internal conductor and an internal insulator covering the internal conductor, and an external insulator covering the plurality of electric wires.
A plurality of conductive terminals each connected to the inner conductor of each of the plurality of electric wires, and
A fitting portion in which the plurality of terminals are arranged and fitted with the mating connector, a terminal holding portion provided behind the fitting portion and holding the terminal, and a terminal holding portion provided behind the terminal holding portion. An insulating housing including an electric wire holding portion for aligning and holding the plurality of electric wires exposed by removing the external insulator in a state of being in close contact with each other in the left-right direction.
Have,
The electric wire holding portion is
The concave groove into which the plurality of electric wires can be inserted and
It is provided at the front end and the rear end of the concave groove and between the front end and the rear end at intervals along the front-rear direction, and protrudes from the inner wall of the concave groove to form an internal insulator. With multiple ribs that come into contact with each other
Equipped with a,
The plurality of ribs
The distance between the plurality of electric wires inserted in the concave groove is the same as that when the cable is included in the cable.
The plurality of electric wires inserted in the concave groove are
The pressing force from the plurality of ribs is absorbed only by the internal insulator, and the pressing force from the plurality of ribs does not reach the internal conductors, so that the distance between the internal conductors does not change.
An electrical connector that features that. The plurality of ribs
It is provided along the front-rear direction at the interval of 10 times or less the outer diameter of a single electric wire among the plurality of electric wires.
The electrical connector of claim 1 Symbol mounting, characterized in that. The plurality of ribs
It is provided along the front-rear direction at the interval equal to or larger than the outer diameter of a single electric wire among the plurality of electric wires.
The electric connector according to claim 1 or 2.

Images