JP2001357945A - Shield connector and shield terminal unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield connector and a shield terminal unit which can aim an improvement in grounding reliability and grounding characteristics while reducing the number of contacts of the grounding path between an outer conductor terminal section of the shield terminal unit and attachment components, and can omit an insulation barrel of the shield terminal unit while preventing damages on connection sections of electric wires and terminals at time of insertion in the connector housing of the shield terminal unit, and can shorten the terminal length of the shield terminal unit, and can equip the shield terminal unit certainly to a predetermined position of the connector housing. SOLUTION: In the shield connector, a conductive grounding element 35 integrated with an outer conductor terminal section 33 of a shield terminal unit 13 which is to be mounted, is pulled out to the exterior of the connector housing, and is directly contacted electrically to a conductive attaching plate in which the shield connector is attached, and is grounded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shield connector and a shield terminal unit.

[0002]

2. Description of the Related Art There is a shield connector in which one of male and female shield connectors is fixed to a mounting member, and the other shield connector is fitted and connected to the fixed shield connector. In this case, the mounting member is formed of a metal member, and the outer conductor terminal portion of the shield terminal unit of the fixed shield connector is often grounded to the mounting member.

A conventional fixed-side shield connector of this type is disclosed in Japanese Patent Application Laid-Open No. Hei 8-96895 (first conventional technology) and Japanese Patent Application Laid-Open No. Hei 11-102752 (second conventional technology).

[0004] In the first prior art, a shield member is provided so as to surround the shield terminal unit. The shield member has a contact piece that abuts against the outer conductor terminal of the shield terminal unit by a spring force, and a seat that is fixed to a screwing portion between the fixed portion of the connector housing and the mounting member and is in electrical contact with the mounting member. Coating part is provided,
The outer conductor terminal of the shield terminal unit is grounded to the mounting member via the shield member.

In the second prior art, the connector housing is provided with an engagement hole into which a conductive metal bracket fixed to a metal mounting member is inserted and locked, and is provided outside the shield terminal unit. An earth plate is provided integrally with the conductor terminal portion. The ground plate is in electrical contact with the metal bracket inserted and locked in the engagement hole, and the outer conductor terminal of the shield terminal unit is grounded to the mounting member via the ground plate and the metal bracket. It is supposed to be.

[0006]

However, in each of the above-mentioned prior arts, the conductive relay member (shield member or metal bracket) formed as a member separate from the outer conductor terminal portion of the shield terminal unit is used as the outer conductor. The outer conductor terminal portion of the shield terminal unit is electrically connected to the terminal portion or an earth plate integrally formed with the outer conductor terminal portion, and the outer conductor terminal portion is grounded to the mounting member via the relay member. There is a problem that the number of contacts in the ground path between the mounting member and the mounting member is large. With such a large number of contacts, grounding is likely to be uncertain, the contact resistance at the contacts is insufficient, and the contact resistance tends to increase due to the formation of an oxide film on the contacts. There is a possibility that the performance is reduced, and sufficient noise countermeasures cannot be taken.

Further, in each of the above-mentioned prior arts, when the shield terminal unit is inserted into the housing chamber of the connector housing, there is substantially no gripping portion other than the shielded wire, and the shielded wire near the shield terminal unit is gripped. It is necessary to insert the shield terminal unit into the accommodation room, so that the shield terminal unit is provided with an insulation barrel to improve the strength of the connection between the terminal and the electric wire. It is necessary to prevent the connection portion and the like from being buckled and damaged by an external force applied to the connection portion. The necessity of preventing damage due to external force at the time of terminal insertion becomes particularly large when a shield terminal unit connected to a small-diameter shielded electric wire is inserted.

For this reason, in each of the above-mentioned prior arts, it is necessary to provide an insulation barrel in the shield terminal unit in order to prevent damage to the connection between the terminal and the electric wire due to external force when inserting the terminal. The insulation barrel is an obstacle in shortening the terminal length of the shield terminal unit.

In particular, in the first prior art, when the shield terminal unit is inserted into the connector housing, the shield terminal unit inserts the contact piece of the shield member in such a manner that the contact piece is spread out against the spring force. Therefore, a large insertion force is required, and buckling or the like of a connection portion between the electric wire and the terminal is likely to occur.

In view of the above problems, the first aspect of the present invention
An object of the present invention is to provide a shielded connector and a shielded terminal unit which can reduce the number of contacts in a grounding path between an outer conductor terminal portion of the shielded terminal unit and a mounting member, and improve grounding reliability and grounding performance. is there.

Further, a second object of the present invention is to prevent the insulation barrel of the shield terminal unit from being damaged while preventing the connection portion between the electric wire and the terminal when the shield terminal unit is inserted into the connector housing. Another object of the present invention is to provide a shield connector and a shield terminal unit that can shorten the terminal length of the shield terminal unit.

[0012]

Technical means for achieving the above object include a shield terminal unit (13) connected to a predetermined shielded electric wire (9), and a connector into which the shield terminal unit is inserted and held. Housing (11)
Wherein the shield terminal unit (13) is electrically connected to an inner conductor (9a) of the shielded electric wire and a mating shield terminal. An inner conductor terminal portion (31) that can be fitted and electrically connected to a mating inner conductor terminal portion of the unit (43), and is electrically connected to the outer conductor (9c) of the shielded cable, and the inner conductor terminal portion is removed. And surrounding the shield terminal unit (43).
An outer conductor terminal portion (33) that can be fitted and electrically connected to the mating outer conductor terminal portion, and integrally formed with the outer conductor terminal portion so as to project outward from an outer peripheral portion of the outer conductor terminal portion. The connector housing (11) penetrates back and forth, and the outer conductor terminal portion of the shield terminal unit is freely insertable from a rear end side opening. A housing body (21) having a receiving chamber (21a) for receiving the counterpart shield terminal unit fitted and connected to the shield terminal unit from the front opening thereof, and protruding from an outer surface of the housing body. , A fixing portion (2) for mounting to the mounting member.
3) wherein the grounding strip is pulled out of the housing chamber to the outside of the housing main body in a state where the outer conductor terminal portion of the shield terminal unit is inserted and held in the housing chamber of the connector housing. And the fixing portion is fixed to the mounting member with the fixing member interposed therebetween with a fixing tool (5) so that the grounding piece contacts the mounting member. And grounded.

Technical means for achieving the above object are a shield terminal unit (13) connected to a predetermined shielded electric wire (9), and a connector housing (11) into which the shield terminal unit is inserted and held. With
A shield connector attached to a conductive attachment member (3), wherein the shield terminal unit (13) comprises:
An inner conductor terminal portion (31) electrically connected to the inner conductor (9a) of the shielded electric wire and capable of being electrically connected to the mating inner conductor terminal portion of the mating shield terminal unit (43) by fitting; An outer conductor electrically connected to the outer conductor (9c) of the shielded wire to surround the inner conductor terminal portion and to be electrically connected to the mating outer conductor terminal portion of the mating shield terminal unit (43) by fitting. Conductor terminal (33)
And a conductive grounding piece (35) integrally formed with the outer conductor terminal so as to protrude outward from an outer peripheral portion of the outer conductor terminal.
1) penetrates back and forth, the outer conductor terminal portion of the shield terminal unit is freely insertable from a rear end side opening portion, and is fitted and connected to the shield terminal unit from a front side opening portion thereof. A housing main body (21) having an accommodation chamber (21a) for receiving a mating shield terminal unit; and a fixing portion (23) protruding from an outer surface of the housing main body for mounting to the mounting member. In a state in which the outer conductor terminal portion of the shield terminal unit is inserted and held in the accommodation room of the connector housing, the grounding piece is pulled out of the accommodation room to the outside of the housing main body and overlaps with the fixing portion. The grounding strip is placed in electrical contact with the fixing member by fixing the fixing portion to the mounting member with a conductive fixing member (5). Characterized by grounded to the mounting member via the fastener.

[0014] Preferably, the fixing portion of the connector housing protrudes from a side wall surface of the housing main body, and the fixing portion extends along a direction in which the shield terminal unit is inserted into the connector housing. A through hole (23a) through which the fixing tool penetrated through is inserted is provided, and a slit (21c) extending in the insertion direction and opening to the rear end side of the housing main body is provided in a side wall of the housing main body. ) Is provided, and the outer conductor terminal portion (33) of the shield terminal unit is connected to the outer conductor of the shielded wire by crimping (3).
3c), and a fitting connection part (33b) provided at a front end of the crimping part and fittingly connected to the counterpart outer conductor terminal part of the counterpart shield terminal unit. The piece (35) protrudes outward from a side wall portion at a rear end of the fitting connection portion of the outer conductor terminal portion, and the outer conductor terminal portion of the shield terminal unit is inserted and held in the accommodation chamber. The extended portion (3) whose end is pulled out of the housing body through the slit in the
5a, 35b), extending from the end of the extending portion, the normal direction thereof is parallel to the insertion direction, and the fixing tool can be inserted into a position corresponding to the through hole of the fixing portion. Grounding part (35c) provided with a special fixing hole (35d)
Wherein the extended portion of the ground piece is slid into the slit when the outer conductor terminal portion of the shield terminal unit is inserted into the accommodation chamber, and the outer conductor of the shield terminal unit is provided. In a state where the terminal portion is inserted and held at an appropriate position in the accommodation room, the grounding portion of the grounding piece abuts on the rear end surface of the fixing portion, and the fixing tool is formed between the through hole of the fixing portion and the grounding portion. It is preferable to be inserted through the fixing hole and tightened and fixed to the mounting member.

Preferably, the outer conductor terminal portion of the connector housing and the shield terminal unit are engaged with each other as the outer conductor terminal portion is inserted to the proper position in the accommodation chamber. It is preferable that an engagement portion and an engaged portion are provided for locking the outer conductor terminal portion in the accommodation chamber.

The technical means for achieving the above object is a shield terminal unit which is connected to a predetermined shielded electric wire (9) and is grounded to a conductive mounting member (3). And electrically connected to the internal conductor (9a) of the other terminal and a shield terminal unit (43) of the other side.
An inner conductor terminal part (31) that can be fitted and electrically connected to a mating inner conductor terminal part, and an outer conductor (9) of the shielded wire.
an outer conductor terminal portion (33) electrically connected to c) and surrounding the inner conductor terminal portion, and capable of being electrically connected to the mating outer conductor terminal portion of the mating shield terminal unit (43) by being fitted thereto. And a fixing piece formed integrally with the outer conductor terminal portion so as to protrude outward from an outer peripheral portion of the outer conductor terminal portion, and fixed to the mounting member using a predetermined fixing tool to be electrically contacted. (35).

[0017]

FIG. 1 is a perspective view of a mounted state of a shielded connector according to a first embodiment of the present invention, and FIG. 2 is fitted and connected to the shielded connector of FIG. 3 is an exploded perspective view of the configuration of FIG. 1, FIG. 4 is a perspective view of the connector housing, FIG. 5 is a sectional view of the connector housing, and FIG. It is a perspective view of a terminal unit,
FIG. 7 is an exploded perspective view of the shield terminal unit, and FIG.
FIG. 3 is an exploded perspective view of the mating shield connector of FIG. 2.

The shield connector 1 according to the present embodiment comprises:
As shown in FIG. 1, the fixed-side shield connector is fixed to a metal mounting plate (mounting member) 3 by a screw or a pin (in this embodiment, a screw 5) as a fixing tool.
And a mating shield connector 7 shown in FIG.

The shield connector 1 includes a connector housing 11 shown in FIG. 4 and a shield terminal unit 13 shown in FIG.

The connector housing 11 includes a housing body 21 and a pair of left and right fixing parts 23 integrally projecting from left and right side walls of the housing body 21. The housing main body 21 is provided with a housing chamber 21a that penetrates back and forth. A substantially rear half portion of the housing chamber 21a functions as a terminal housing chamber for holding the shield terminal unit 13 inserted from the rear end side opening (from the direction of arrow A in FIG. 4). A substantially front half of the accommodation chamber 21a receives the distal end of the mating shield connector 7 from the front opening thereof, and is connected to the shield terminal unit 13 and the mating shield terminal unit 43 fitted and connected to the shield terminal unit 13. It functions as a connector accommodating chamber that allows fitting connection with the connector.

As shown in FIG. 5, an engaging portion (engaged portion) 33e of the shield terminal unit 13 engages with the receiving chamber 21a to prevent and lock the terminal 13 in the housing chamber 21a. The stop piece (engaging portion) 21b is provided with a spring property in a cantilever indication manner.

Further, as shown in FIG. 4, the shield terminal unit 13 is inserted into the housing chamber 21a in the insertion direction A at the upper position of the side wall portion (here, the left and right side wall portions) of the housing body 21. A slit 21 c that extends and opens at the rear end side of the housing body 21 is provided.

The fixing portions 23 are provided with through holes 23a for screw fixing, which penetrate back and forth along the insertion direction A. Further, the front end face 23b and the rear end face 2 of both fixing portions 23
3c is set such that its normal direction is parallel to the insertion direction A.

The shield terminal unit 13 is a terminal (in this case, a male terminal) forming a male and female pair with the mating shield terminal unit 43. As shown in FIG. 7, the inner conductor terminal portion 31 and the outer conductor terminal A portion 33, a pair of conductive grounding pieces 35 provided integrally with the outer conductor terminal portion 33, and a substantially ring-shaped insulator 37 are provided. In the present embodiment, the outer conductor terminal portion 33 and the grounding piece 35 are formed integrally by punching and bending a single metal piece.
And the outer conductor terminal portion 33 may be formed separately, and the grounding piece 35 may be integrally fixed to the outer conductor terminal portion 33 by welding, soldering, or the like and connected.

The inner conductor terminal portion 31 is extended from a crimp portion 31a which is crimped to the exposed inner conductor portion 9a of the shielded electric wire 9 and electrically connected thereto, and a front end of the crimp portion 31a. Either a male or female (here, male side) fitting connection portion 31b that fits and connects with an inner conductor terminal portion (not shown) of the mating shield terminal unit 43 is provided.

The outer conductor terminal 33 extends from the crimping portion 33a and the front end of the crimping portion 33a, and is fitted and connected to the outer conductor terminal 45 (see FIG. 8) of the mating shield terminal unit 43. And a connection portion 33b.

The crimping portion 33a has a barrel 33 for electrical connection.
c, and an insulation barrel 33d provided on the rear side thereof. Barrel 33c for electrical connection
Is crimped to a portion of the outer conductor 9c formed of a metal braid or the like where the outer sheath 9b of the shielded wire 9 is peeled and exposed, or a portion where the exposed outer conductor 9c is folded over the outer sheath 9b and inverted. Electrically connected. The insulation barrel 33d is connected to the shielded electric wire 9 from above the outer skin 9b.
Is crimped. Here, the crimping of the crimping portion 33a is performed in a state where the inner conductor terminal portion 31 crimped and connected to the shielded wire 9 is inserted into a predetermined position in the fitting connection portion 33b. In this embodiment, the insulation barrel 33d
Can be omitted.

The fitting connection portion 33b has a cylindrical shape penetrating back and forth, and accommodates the inner conductor terminal portion 31 inserted from the rear side. Further, an insulator 37 is inserted into the fitting connection portion 33b from the front side thereof, and the inner conductor terminal portion 31 is formed by the insulator 37 into the fitting tube connection portion 33b.
Is held in the fitting connection portion 33b in a state of being separated from the connection portion 33b. In addition, the locking piece 21 of the housing body 21 is provided on the side wall portion (here, the rear end portion of the upper side wall portion) of the fitting connection portion 33b.
An engagement portion 33e that engages with b is provided.

Each of the grounding pieces 35 is a first flat extension extending in the left-right direction from the side face (here, left and right side faces) at the rear end of the fitting connection 33b of the outer conductor terminal 33. Part 35
a, a flat second extended portion 35b extending downward from an outer end of the first extended portion 35a, and a left-right direction from a front end of the second extended portion 35b. And a flat plate-like grounding portion 35c that is extended. The grounding portion 35c is provided with a fixing hole 35d. The first and second extending portions 35a and 35b are provided on the extending portion of the connecting piece according to the present invention.
Is supported.

Here, the first extending portion 35a is provided so that the normal direction thereof coincides with the vertical direction of the connector 1, and the second extending portion 35b has the normal direction thereof
Are provided so as to coincide with the horizontal direction of the
5c is provided such that its normal direction coincides with the front-back direction (insertion direction A) of the connector 1.

Each of the slits 21c of the connector housing 11 is provided at a position corresponding to each of the first extending portions 35a of the grounding piece 35, and the shield terminal unit assembled as shown in FIG. 13 is an accommodation chamber 21 of the connector housing 11 shown in FIG.
a to the predetermined intermediate position in the
The first extension portion 35a is slidably inserted from the rear side into c. In this state, the outer end of the first extending portion 35a extends to the outside of the housing main body 21, and the second extending portion 35b comes into sliding contact with the outer surfaces of the left and right side walls of the housing main body 21. ing.

Here, in the present embodiment, when the shield terminal unit 13 is inserted into the accommodation chamber 21a, a part of the grounding piece 35 (in this case, provided integrally with the outer conductor terminal portion 33 of the shield terminal unit 13). , The second extending portion 35b and the grounding portion 35c) are drawn out of the housing body 21 through the slit 21c.
Extension portion 35b and ground portion 3 drawn out of
5c, the shield terminal unit 13 can be inserted.

When the shield terminal unit 13 is inserted to an appropriate position in the storage chamber 21a (for example, a position where the first extension portion 35a contacts the downstream end face in the insertion direction A in the slit 21c), FIG. As shown in FIG. 7, the shield terminal unit 13 is prevented from falling into the accommodation chamber 21a by the engagement between the locking piece 21b and the engaging portion 33e, and the grounding portion 35c of the grounding piece 35 is fixed. Part 23
Abuts against the rear end face 23c. Here, the fixing hole 35 d of the grounding piece 35 is provided at a position corresponding to the through hole 23 a of the fixing portion 23.

The shield connector 1 loaded with the shield terminal unit 13 as described above is fixed to the mounting plate 3 by screws, as shown in FIGS. The mounting plate 3 is provided with a through hole 3a and a pair of screw holes 3b. Through hole 3
a is a size in which the housing body 21 of the shield connector 1 is just fitted, and the shield connector 1 is inserted into the through hole 3a from the front side of the mounting plate 3 with its rear end first. When it is inserted, as shown in FIG. 1, the grounding portion 35 c of the grounding piece 35 comes into contact with the mounting plate 3 so as to be sandwiched between the mounting pair 3 and the fixing portion 23. The pair of screw holes 3b are provided at positions corresponding to the through holes 23a of the respective fixing portions 23 of the shield connector 1 inserted into the through holes 3a.

Then, as shown in FIG. 1, the screw 5 is passed through the through hole 23a of the fixing portion 23 and the fixing hole 35d of the ground portion 35c from the front side of the mounting plate 3 so that the screw hole 3 of the mounting plate 3 is formed.
b, the fixing portion 23 and the ground portion 35
c is clamped and fixed between the head of the screw 5 and the mounting plate 3, and the grounding portion 35c is in planar electrical contact with the mounting plate 3, so that the outer conductor terminal portion 33 of the shield terminal unit 13 is grounded. 35, and is grounded to the mounting plate 3.

The mating shield connector 7 shown in FIG. 2 is fitted and connected to the shield connector 1 mounted on the mounting plate 3 in this manner. As shown in FIG. 8, the mating shield connector 7 includes a connector housing 41 and a mating shield terminal unit 43 fitted and connected to the above-described shield terminal unit 13. The connector housing 41 is provided with a housing chamber 41a that penetrates back and forth. In the present embodiment, the distal end of the mating shield connector 7 is inserted into the accommodation chamber 21a of the connector housing 11 of the shield connector 1 so that the connectors 1 and 7 are fitted and connected.

The accommodation chamber 41a holds the mating shield terminal unit 43 inserted from the rear end opening, and when the mating shield connector 7 is fitted with the shield connector 1, the front opening thereof is opened. The shield terminal unit 13 is received from the portion, and the fitting connection between the shield terminal unit 13 and the counterpart shield terminal unit 43 is permitted.

The configuration of the mating shield terminal unit 43 is a well-known general configuration, so that only a brief description will be given, and a detailed description thereof will be omitted. The mating shield terminal unit 43 is a terminal (in this case, a female terminal) forming a male and female pair with the above-described shield terminal unit 13, and is housed in the outer conductor terminal portion 45 and the outer conductor terminal portion 45. And an insulator 47 (not shown).

The inner conductor terminal portion is a crimp portion (not shown) which is crimped to and electrically connected to the stripped and exposed inner conductor of the shielded wire 49, and extends from the front end of the crimp portion. Inner conductor terminal 31 of unit 13
And a fitting connection portion (not shown) of either male or female (here, female side) that fits and connects with the fitting connection portion 31b.

The outer conductor terminal portion 45 extends from the crimping portion 45a and the front end of the crimping portion 45a, and is internally fitted and connected to the fitting connection portion 33b of the outer conductor terminal portion 33 of the shield terminal unit 13. And a cylindrical fitting connection portion 45b. At least a barrel for electrical connection is provided on the crimping portion 45a, and the barrel for electrical connection is
Is crimped to a portion of an outer conductor formed of a metal braid or the like exposed by peeling the outer skin, or a portion obtained by folding the exposed outer conductor over the outer skin and inverting the outer conductor.

The insulator 47 is interposed between the inner conductor terminal portion inserted into the fitting connection portion 45b of the outer conductor terminal portion 45 and the fitting connection portion 45b, and is fitted with the inner conductor terminal portion. It is positioned and held in an insulated state in the joint 45b.

The mating shield terminal unit 43 thus configured is housed in the housing chamber 41 of the connector housing 41.
a.

The shield connector 1 and the mating shield connector 7 are connected by inserting the distal end of the mating shield connector 7 into the housing chamber 21a of the connector housing 11 of the shield connector 1 and fitting the same. Done. By this fitting, the inner conductor terminal portions 31 and the outer conductor terminal portions 33 and 45 of both connectors 1 and 7 are fitted to each other and are electrically connected.

Further, in this fitting state, the flexible projection provided on the connector housing 41 of the mating shield connector 7 is fitted to the engaging projection 21d (see FIG. 5) provided on the connector housing 11 of the shield connector 1. By engaging the claw portions 41c of the cantilever-shaped lock arm portion 41b having the above, the connectors 1 and 7 are locked in a fitted state.

As described above, according to the present embodiment, a part of the conductive grounding piece 35 provided integrally with the outer conductor terminal 33 of the shield terminal unit 13 is brought into direct electrical contact with the mounting plate 3. Terminal unit 1
3, the number of contacts in the ground path between the outer conductor terminal portion 33 and the mounting plate 3 can be reduced, and the reliability of grounding and the grounding performance can be improved.

Further, since the number of contacts in the grounding path between the outer conductor terminal portion 33 of the shield terminal unit 13 and the mounting plate 3 can be reduced, an increase in contact resistance due to an oxide film or the like at the contact portion is less likely to occur. can do.

Furthermore, since there is no need for a relay member (shield member, metal bracket) as in the first and second prior arts, the number of parts can be reduced and cost can be reduced.

Further, when the shield terminal unit 13 is inserted into the housing chamber 21a of the connector housing 11, the second extension portion 35b of the grounding piece 35 drawn out of the connector housing 11 through the slit 21c and the ground. The terminal 13 can be inserted by holding the portion 35c,
There is no need to hold the shielded wire 9 and insert the terminal as in the related art, and a large external force is not applied to the connection between the shielded terminal unit 13 and the shielded wire 9 during terminal insertion. Therefore, it is possible to prevent damage due to buckling of a connection portion between the shielded electric wire 9 and the shield terminal unit 13 when the terminal is inserted. As a result, in the configuration of the crimping portion 33a of the outer conductor terminal portion 33 of the shield terminal unit 13, the terminal unit 13 and the shielded wire 9
Insulation barrel 33d can be omitted as necessary while preventing damage to the connection portion with
The terminal length of the shield terminal unit 13 can be reduced.

Further, since the grounding strip 35 of the shield terminal unit 13 projects from the rear end side wall of the fitting connection 33b of the outer conductor terminal 33, the crimping portion 33a of the outer conductor terminal 33 is formed. Compared with the case where the grounding piece 35 is provided at the rear end, the grounding piece 35 can be provided with almost no increase in the terminal length of the shield terminal unit 33.

When the shield terminal unit 13 is inserted to an appropriate position in the accommodation room 21a,
5 is the fixed part 2 of the connector housing 11.
3 is in contact with the rear end face 23c, so that it is determined whether or not the shield terminal unit 13 has been inserted to an appropriate position by checking whether there is a gap between the grounding portion 35c and the fixing portion 23. Can be easily confirmed visually.

Further, if the shield terminal unit 13
When the shield connector 1 is fixed to the mounting plate 3 in a state where the screw 5 is not sufficiently inserted into the accommodation chamber 21a, the screw 5 is screwed into the screw hole 3b of the mounting plate 3 and the head of the screw 5 As the grounding portion 35c of the grounding piece 35 is sandwiched and fixed between the mounting plate 3 and the fixing portion 23 of the connector housing 11, the grounding portion 35c of the grounding piece 35 is
1 is pressed and moved to a position where it comes into contact with the rear end surface 23c of the first fixing portion 23, and the shield terminal unit 13 is
It is designed to be moved to the appropriate position in the inside. Therefore, when the shield connector 1 is mounted, the shield terminal unit 13 can be reliably positioned at an appropriate position in the accommodation room 21a, and the reliability can be improved.

When the shield terminal unit 13 is inserted into the accommodation chamber 21a, the first extension 35a of the grounding piece 35 of the shield terminal unit 13 is slid into the slit 21c of the housing body 21. Therefore, the shield terminal unit 13 can be more smoothly inserted by the guide action of the first extension portion 35a and the slit 21c.

Further, in a state where the shield connector 1 is mounted, the shield terminal unit 13 includes the first fixing structure including the locking pieces 21b and the engaging portions 33e, and the grounding pieces 3.
5 is double-fixed to the connector housing 11 or the like by a second fixing structure by screwing the grounding portion 35c to the mounting plate 3 without using a separate fixing member such as a retainer. Can be firmly fixed, and the reliability of the fixing of the shield terminal unit 13 can be improved.

As a modification of the present embodiment, as shown in FIG. 9, the shield connector 1 is inserted into the through hole 3a from the rear side of the mounting plate 3 with the front end thereof at the front side, and The screw 5 is screwed into the screw hole 3b of the mounting plate 3 from the back side of the mounting plate 3 through the mounting hole 35d of the grounding portion 35c and the through hole 23a of the fixing portion 23.
And the grounding piece 35 may be grounded. In this mounting state, the head of the screw 5 is
The body of the screw 5 is screwed into the screw hole 3b of the mounting plate 3, and the grounding piece 35 is grounded to the mounting plate 3 via the screw 5 as a fixing tool.

<Second Embodiment> FIG. 10 shows a second embodiment of the present invention.
It is a perspective view of the shield terminal unit according to the embodiment,
FIG. 11 is a view showing a state in which the shield terminal unit of FIG. 10 is attached to a mounting plate and fitted and connected to a mating shield connector.

The shield terminal unit 5 according to the present embodiment
1 has substantially the same configuration as the shield terminal unit 13 described above, except that the above-described grounding strip 35 is used not only for grounding but also for fixing the shield terminal unit 51 to the mounting plate 3. Corresponding parts have the same reference characters allotted, and description thereof will not be repeated. The configuration of the mounting plate 3 to which the shield terminal unit 51 is mounted and the configuration of the mating shield connector 7 connected to the shield terminal unit 51 are substantially the same as those in the above-described embodiment, and are different here. Only the points will be described. In addition, the grounding piece 35 corresponds to the fixing piece of the present invention.

In this embodiment, the connector housing 11
Are omitted, as shown in FIG. 11, the main body portion (the fitting connection portion 3 of the inner conductor terminal portion 31 and the outer conductor terminal portion 33) of the shield terminal unit 51 of the shield terminal unit 51.
1b, 33b) with the rear end at the leading end.
The shield terminal unit 51 is fixed to the mounting plate 3 by inserting the grounding portion 35c of the grounding piece 35 to the mounting plate 3 with the screw 5 by inserting the grounding portion 35c into the through-hole 3a from the front side. I have. In this mounting state, the distal end of the main body of the shield terminal unit 51 is disposed as desired in the through hole 3a from the back side of the mounting plate 3.

Then, the mating shield connector 7 shown in FIG. 2 is fitted and connected to the shield terminal unit 51 mounted on the mounting plate 3 as shown in FIG. In the present embodiment, the through hole 3a of the mounting plate 3 is set to have a size substantially such that the mating shield connector 7 is just fitted into the through hole 3a. The engaging projection 53 engages with the claw portion 41 c of the lock arm portion 41 b of the connector housing 41 as the mating shield connector 7 is fitted and connected to the shield terminal unit 51. I do.

As described above, according to this embodiment, the number of contacts in the ground path between the outer conductor terminal portion 33 of the shield terminal unit 51 and the mounting plate 3 is reduced, as in the first embodiment. And the connector housing 11 can be omitted, so that the size, the number of parts, and the weight can be reduced, and the thickness of the portion for fixing to the mounting plate 3 can be reduced.
Only the thickness of the grounding portion 35c of the grounding piece 35 provided at the bottom of the device can be reduced. As a result, the length of the screw 5 can be reduced, and the device can be further reduced in size and weight.

In each of the above embodiments, the screw 5 is used as a fixing tool for fixing the shield connector 1 and the shield terminal unit 51 to the mounting plate 3, but a bolt and a nut may be used. May be used.

[0061]

According to the first aspect of the present invention, the conductive grounding piece provided integrally with the outer conductor terminal portion of the shield terminal unit is directly in electrical contact with the mounting member and grounded. In addition, the number of contacts in the ground path between the outer conductor terminal of the shield terminal unit and the mounting member can be reduced, and the reliability of grounding and the grounding performance can be improved.

Further, since the number of contacts in the grounding path between the outer conductor terminal portion of the shield terminal unit and the mounting member can be reduced, it is possible to prevent an increase in contact resistance due to an oxide film or the like at the contact portion. it can.

Further, since there is no need for a relay member (shield member, metal bracket) as in the first and second prior arts, the number of parts can be reduced and the cost can be reduced.

According to the second aspect of the present invention, the conductive grounding piece provided integrally with the outer conductor terminal portion of the shield terminal unit is brought into direct electrical contact with the conductive fixing tool, so that the fixing tool is used. Therefore, the number of contacts on the ground path between the outer conductor terminal portion of the shield terminal unit and the mounting member can be reduced, and the reliability of grounding and the grounding performance can be improved.

Further, since the number of contacts in the grounding path between the outer conductor terminal portion of the shield terminal unit and the mounting member can be reduced, it is possible to prevent an increase in contact resistance due to an oxide film or the like at the contact portions. it can.

Further, since the relay member (shield member, metal bracket) as in the first and second prior arts is not required, the number of parts can be reduced and the cost can be reduced.

According to the third aspect of the present invention, when the shield terminal unit is inserted into the housing chamber of the connector housing, the portion of the grounding piece drawn out of the connector housing through the slit is gripped to hold the terminal. It is not necessary to insert the terminal while holding the shielded wire as in the related art, and a large external force is not applied to the connection between the shielded terminal unit and the shielded wire at the time of terminal insertion. For this reason, it is possible to prevent damage due to buckling of a connection portion between the shielded electric wire and the shield terminal unit when the terminal is inserted. As a result, the outer conductor of the shielded wire is stripped and the exposed outer conductor, or the exposed outer conductor is folded back on the outer skin and crimped only at one point, and the barrel is pressed out of the shield terminal unit. The insulation barrel of the outer conductor terminal portion can be omitted if necessary while preventing damage to the connection portion between the terminal unit and the shielded wire when the terminal is inserted. The terminal length of the shield terminal unit can be shortened.

Further, since the grounding piece of the shield terminal unit is protruded from the side wall at the rear end of the fitting connection portion of the outer conductor terminal, the grounding piece is provided at the rear end of the crimped portion of the outer conductor terminal. The grounding strip can be provided with almost no increase in the terminal length of the shield terminal unit as compared with the case of providing the ground terminal.

Further, when the shield terminal unit is inserted to an appropriate position in the accommodation room, the grounding portion of the grounding piece comes into contact with the rear end surface of the fixing portion of the connector housing. By confirming whether there is a gap between the shield terminal unit and the shield terminal unit, it can be easily visually confirmed whether or not the shield terminal unit has been inserted to an appropriate position.

Further, even if the shield terminal unit is fixed to the mounting member in a state where the shield terminal unit is not sufficiently inserted into the accommodation chamber, the through hole of the fixing portion of the connector housing and the fixing hole of the grounding piece may be provided. The fixing member is inserted through the fixing member and the fixing portion of the connector housing is fixed between the fixing member and the mounting member. The shield terminal unit is pressed and moved to a position where it comes into contact with the end face, and is moved to an appropriate position in the accommodation room. Therefore, when the shield connector is mounted, the shield terminal unit can be reliably positioned at an appropriate position in the accommodation room, and reliability can be improved.

Further, when the shield terminal unit is inserted into the accommodation room, the extended portion of the grounding piece of the shield terminal unit is slidably inserted into the slit of the housing body, so that the guide of the extended portion and the slit is provided. The function allows the shield terminal unit to be inserted more smoothly.

According to the fourth aspect of the present invention, when the shielded connector is mounted, the shield terminal unit is formed by the first and second engaged portions provided on the connector housing and the outer conductor terminal portion. Since it is double-fixed to the connector housing or the like by the fixing structure and the second fixing structure using the fixing member of the grounding piece to the mounting plate of the grounding portion, there is no need to use another fixing member such as a retainer. In addition, the terminal unit can be firmly fixed, and the reliability of fixing the shield terminal unit can be improved.

According to the fifth aspect of the invention, the conductive fixing piece provided integrally with the outer conductor terminal portion of the shield terminal unit is directly attached to the mounting member as it is fixed to the mounting member. Since it is electrically contacted and grounded, the number of contacts in the grounding path between the outer conductor terminal portion of the shield terminal unit and the mounting member can be reduced, and the reliability of grounding and the grounding performance can be improved.

In addition, since the number of contacts in the grounding path between the outer conductor terminal portion of the shield terminal unit and the mounting member can be reduced, it is possible to prevent an increase in contact resistance due to an oxide film or the like at the contact portion. it can.

Further, since the relay member (shield member, metal bracket) as in the first and second prior arts is not required, the number of parts can be reduced and the cost can be reduced.

Further, since the connector housing can be omitted, the size, the number of parts, and the weight can be reduced, and the thickness of the portion for fixing to the mounting member is reduced by the fixing piece provided on the shield terminal unit. , And as a result, the length of the screw or the pin can be reduced, and the weight of the device can be further reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an attached state of a shielded connector according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a mating shield connector fitted and connected to the shield connector of FIG. 1;

FIG. 3 is an exploded perspective view of the configuration of FIG.

FIG. 4 is a perspective view of a connector housing.

FIG. 5 is a cross-sectional view of the connector housing.

FIG. 6 is a perspective view of a shield terminal unit.

FIG. 7 is an exploded perspective view of the shield terminal unit.

FIG. 8 is an exploded perspective view of the mating shield connector of FIG. 2;

FIG. 9 is an enlarged view of a main part showing a modified example of an attached state of the shielded connector of FIG. 1;

FIG. 10 is a perspective view of a shield terminal unit according to a second embodiment of the present invention.

11 is a view showing a state in which the shield terminal unit of FIG. 10 is attached to a mounting plate and fitted and connected to a mating shield connector.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 shield connector 3 mounting plate 5 screw 7 mating shield connector 9 shielded wire 11 connector housing 13 shield terminal unit 21 housing body 21a accommodation room 21c slit 23 fixing portion 31 inner conductor terminal portion 31a crimping portion 31b fitting connection portion 33 outer conductor Terminal part 33a Crimp part 33b Fitting connection part 35 Grounding piece 35a First extending part 35b Second extending part 35c Grounding part 37 Insulator

Claims (5)

[Claims] A conductive mounting member (3) comprising: a shield terminal unit (13) connected to a predetermined shielded electric wire (9); and a connector housing (11) into which the shield terminal unit is inserted and held. The shield terminal unit (13) is electrically connected to an inner conductor (9a) of the shielded electric wire, and is connected to a mating inner conductor terminal of a mating shield terminal unit (43). An inner conductor terminal portion (31) that can be fitted and electrically connected to the outer conductor (9c) of the shielded electric wire;
An outer conductor terminal portion (33) that surrounds the inner conductor terminal portion and that can be electrically connected to the mating outer conductor terminal portion of the mating shield terminal unit (43) by fitting the outer conductor terminal portion; A conductive grounding piece (35) integrally formed with the outer conductor terminal portion so as to protrude outward from an outer peripheral portion of the connector housing (11). The outer conductor terminal portion of the shield terminal unit is freely insertable from the end side opening, and the receiving chamber for receiving the mating shield terminal unit fitted and connected to the shield terminal unit from the front side opening thereof ( 21a) having a housing body (2
1); and a fixing portion (23) protruding from an outer surface of the housing main body for mounting to the mounting member, wherein the outer conductor terminal portion of the shield terminal unit is provided in the housing chamber of the connector housing. In the state where the grounding piece is inserted and held, the grounding piece is pulled out of the housing chamber to the outside of the housing main body and is arranged so as to be superimposed on the fixing portion, and the fixing portion is disposed with the grounding piece interposed. By fixing to the mounting member with a fixing tool (5),
A shielded connector characterized in that the grounding piece is brought into electrical contact with the mounting member and grounded. 2. A conductive mounting member (3) comprising: a shield terminal unit (13) connected to a predetermined shielded electric wire (9); and a connector housing (11) into which the shield terminal unit is inserted and held. The shield terminal unit (13) is electrically connected to an inner conductor (9a) of the shielded electric wire, and is connected to a counterpart inner conductor terminal of a counterpart shield terminal unit (43). An inner conductor terminal portion (31) that can be fitted and electrically connected to the outer conductor (9c) of the shielded electric wire;
An outer conductor terminal portion (33) that surrounds the inner conductor terminal portion and that can be electrically connected to the mating outer conductor terminal portion of the mating shield terminal unit (43) by fitting the outer conductor terminal portion; And a conductive grounding piece (35) integrally formed with the outer conductor terminal portion so as to protrude outward from an outer peripheral portion of the connector housing (11). The outer conductor terminal portion of the shield terminal unit is freely insertable from the end side opening, and the receiving chamber for receiving the mating shield terminal unit fitted and connected to the shield terminal unit from the front side opening thereof ( 21a) having a housing body (2
1); and a fixing portion (23) protruding from an outer surface of the housing main body for mounting to the mounting member, wherein the outer conductor terminal portion of the shield terminal unit is provided in the housing chamber of the connector housing. The grounding strip is pulled out of the housing chamber to the outside of the housing main body and is arranged so as to overlap with the fixing portion, and the fixing portion is electrically conductively fixed to the mounting member ( 5) The shield connector according to 5), wherein the grounding piece is brought into electrical contact with the fixing tool by fixing according to 5), and is grounded to the mounting member via the fixing tool. 3. The fixing portion of the connector housing projects from a side wall surface of the housing main body, and penetrates through the fixing portion along a direction in which the shield terminal unit is inserted into the connector housing. A through hole (23a) through which the fixing tool can be inserted is provided. A slit (21c) is provided in a side wall portion of the housing main body and extends in the insertion direction and opens to a rear end side of the housing main body. The outer conductor terminal portion (33) of the shield terminal unit.
A crimping portion (33c) crimp-connected to the outer conductor of the shielded wire; a crimping portion provided at a front end of the crimping portion, and fitted with the mating outer conductor terminal portion of the mating shield terminal unit. A mating connection portion (33b) to be connected, wherein the grounding piece (35) projects outward from a rear end side wall portion of the mating connection portion of the outer conductor terminal portion, and Extending portions (35a, 35b) whose ends are drawn out of the housing main body through the slits in a state where the outer conductor terminal portion of the shield terminal unit is inserted and held in the accommodation chamber; A fixing hole (35d) extending from the end of the portion, the normal direction of which is parallel to the insertion direction, and the fixing tool can be inserted into a position corresponding to the through hole of the fixing portion.
And a grounding portion (35c) provided with: the extension portion of the grounding piece is slid into the slit when the outer conductor terminal portion of the shield terminal unit is inserted into the housing chamber. In a state where the outer conductor terminal portion of the shield terminal unit is inserted and held at an appropriate position in the accommodation room, the grounding portion of the grounding piece abuts on a rear end surface of the fixing portion, and the fixing tool is fixed. The shield connector according to claim 1, wherein the shield connector is inserted into a through hole of the portion and a fixing hole of the ground portion, and is fastened and fixed to the mounting member. 4. The connector housing and the outer conductor terminal of the shield terminal unit are engaged with each other as the outer conductor terminal is inserted to the proper position in the accommodation chamber. The shield connector according to claim 3, wherein an engagement portion and an engaged portion are provided for locking and retaining the outer conductor terminal portion in the accommodation chamber. 5. Connected to a predetermined shielded electric wire (9),
A shield terminal unit grounded to a conductive mounting member (3), wherein the shield terminal unit is electrically connected to an inner conductor (9a) of the shielded electric wire and a counterpart inner conductor terminal of a counterpart shield terminal unit (43). An inner conductor terminal portion (31) that can be electrically connected to the outer conductor (9c) of the shielded electric wire;
An outer conductor terminal portion (33) that surrounds the inner conductor terminal portion and that can be electrically connected to the mating outer conductor terminal portion of the mating shield terminal unit (43) by fitting the outer conductor terminal portion; A fixing piece (35) integrally formed with the outer conductor terminal portion so as to project outward from an outer peripheral portion of the fixing member, and fixed to the mounting member using a predetermined fixing tool and in electrical contact therewith. A shield terminal unit, characterized in that: