JP2900807B2 - EMI countermeasure connector and ground terminal processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EM which is used in electric equipment or communication equipment, etc., which is provided with measures against electromagnetic interference.
The present invention relates to a connector for countermeasures against I and a method for treating a ground terminal of a cable connector.

[0002]

2. Description of the Related Art This type of EMI countermeasure connector and ground terminal processing method which are conventionally used will be described with reference to the contents described in the literature (Latest Noise Countermeasure Technology, published in 1986 by General Technology Publishing).

FIG. 5 is an explanatory view of the shielding effect by the ground connection method of the cable side connector of the document (refer to the document 1).
FIG. 36 is a perspective view showing a relationship between respective parts of a connector for EMI countermeasure and a ground terminal processing method manufactured by referring to FIG.

The contact socket 51 has a cable 5
9 and a female contact connected to a male contact of an external back wiring board.
And a ground plate 53 that contacts the ground conductor of the back wiring board and grounds the metal hood (lower) 54.

[0005] A metal hood (lower) 54 is engaged with the plastic shell 52, and a plurality of pedestals 56d and 57c with screw holes are formed in the lower portion of the inner surface. The cable 59 is fixed to the pedestals 56d and 57c with screw holes, and the shield conductor 59a of the cable 59 and the metal hood (lower) are provided.
Clamps 56a, 58 for electrically connecting the
a and the lug terminals of the grounding lead wire 57a are fixed.

[0006] The metal hood (upper) 55 is engaged with the metal hood (lower) 54 and the plastic shell 52.

FIGS. 5A, 5B and 5C show three types of ground terminal processing methods. (A) shows a method using a first cable clamp 56a, in which an aluminum foil 56b is wound on a shield conductor 59a which is exposed and folded outside the cable 59, and the cable clamp 56a is
6b is pressed against the inner surface of the metal hood, and a pedestal 56 having a screw hole formed in the metal hood (lower) via a small screw 56c.
d. As a result, the shield conductor 59a of the cable 59 is made of the aluminum foil 56b and the cable clamp 56.
a, screw 56c, pedestal 56d, metal hood (lower) 54,
It is electrically connected to the ground conductor of the external back wiring board via the ground plate 53.

In the second method shown in FIG. 5B, the lead wire 5 connected to the shield conductor 59a of the cable 59 is used.
The lug terminal 7a is screwed on a pedestal 57c with a small screw 57b.
The shield conductor 59a is electrically connected to the ground conductor of the external back wiring board as in the first method. In this method, it is necessary to fix the cable 59 separately.

In the third method shown in FIG. 5C, the shield conductor 59a which is exposed and folded back to the outside of the cable 59 is provided.
Is fixed by a metal U-shaped clamp 58a and the metal U-shaped clamp 58a is fixed to a pedestal 57c with a screw hole via a small screw 57b, so that the cable 59 is connected to a metal hood (lower).
At the same time, the shield conductor 59a is electrically connected to the ground conductor of the external back wiring board in the same manner as in the first method.

[0010]

In the above-mentioned conventional method, a method using a clamp requires a tool such as a screwdriver for fixing the screw to the pedestal, so that the operation is difficult, and the clamp is difficult. There is a disadvantage that the applicable cable diameter is limited by the size of the cable.

When a lead wire with a lug terminal is used, the cable diameter is not limited, but the connection between the lead wire and the shield conductor and the fixing of the cable are required separately, and the shielding effect is inferior to that of the clamp system. This is clear from the above-mentioned document.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned drawbacks and to fix cables of various diameters to a connector without the need for tools, and at the same time, to connect the shield conductor of the cable to a metal hood with an excellent shielding effect. An object of the present invention is to provide an EMI countermeasure connector which can be electrically connected and a ground terminal processing method.

[0013]

According to the EMI countermeasure connector of the present invention, a contact socket to which a core wire of a cable is connected, a contact socket is held, and a metal hood is grounded by contacting an external ground conductor. An E composed of a plastic shell to which an earth plate is connected and two upper and lower metal hoods which are engaged with the plastic shell and are connected to the shield conductor of the cable by a ground terminal treatment.
In the MI countermeasure connector, a semi-cylindrical clamp portion is formed in the cable line introduction portion of the metal hood so as to be cylindrical when engaged.

The clamp portion has a plurality of cuts from the distal end to the vicinity of the base. At the foremost portion of the clamp portion, a curved portion is formed inside the cylindrical shape and the distal end portion is parallel to the axis of the cylindrical shape. And a convex outer contact portion that bulges out to the outside adjacent to the ground contact portion in the base direction.

The metal hood is covered with a jacket hood, and the jacket hood is made of a flexible material such as plastic. A semi-cylindrical clamp portion is formed so as to be cylindrical when engaged, and the clamp portion is provided with a plurality of cuts from the distal end to the vicinity of the base portion. It is formed in a smooth cylindrical shape with an inner diameter similar to the outer diameter of the part, and an external thread is formed on the outside.

The clamp portion of the jacket hood is engaged with a caulking ring, and a female screw which can be screwed with a male screw provided on the clamp portion of the jacket hood is screwed in a predetermined range from one end of the inner surface of the caulking ring. The connecting portion with the screw portion from the other end of the inner surface has a screw outer diameter, and a conical taper portion is provided so that the ring end surface portion has a predetermined small diameter.

In this method of treating the ground terminal of the EMI countermeasure connector, the exposed and folded shield conductor is arranged on the outside of the cable so as to correspond to the ground contact provided on the clamp of the metal hood. The cable is fixed to the metal hood by screwing the male screw part of the jacket hood covered by the hood and the female screw part of the caulking ring, which has been previously penetrated through the cable, and rotating it forward. And a metal hood are electrically connected.

In the EMI countermeasure connector according to another aspect of the present invention, the outer surface of the clamp portion of the jacket hood is smooth and cylindrical, and a columnar locking projection is formed at a predetermined position.

A predetermined range from one end of the inner surface of the caulking ring is a cylindrical portion slidable with the outer surface of the clamp portion of the outer hood, and from the other end of the inner surface, the connecting portion with the cylindrical portion is the same as the inner diameter of the cylindrical portion. A conical tapered portion is provided so that the diameter of the ring end surface becomes a predetermined small diameter.

A locking groove into which the locking projection of the clamp portion of the jacket hood can be inserted is spirally cut from the end surface of the cylindrical portion to a predetermined position, and a side wall on the end surface side of the locking groove is formed. A plurality of locking recesses are provided.

In this method of treating the ground terminal of the connector for EMI countermeasures, a shield conductor that is exposed and folded back to the outside of the cable is disposed so as to correspond to a ground contact portion provided in a clamp portion of a metal hood. Fitting the caulking ring to the jacket hood and rotating it forward while engaging the locking projection of the jacket hood covered by the hood with the locking groove of the caulking ring that has been previously penetrated by the cable. Thus, the cable is fixed to the metal hood, and the shield conductor and the metal hood are electrically connected.

[0022]

[Function] An exposed and folded shield conductor is arranged on the outside of the cable so as to correspond to the ground contact portion of the clamp portion of the metal hood, and the cable is previously penetrated with the external male screw of the clamp portion of the jacket hood. When the caulking ring is screwed together with the female screw portion on the inner surface of the caulking ring, and the tapered portion on the inner surface of the caulking ring is made of a flexible material, the male screw of the clamp portion of the jacket hood is made of a flexible material. The tip of the metal hood is compressed in the inner diameter direction, the inner surface of the clamp of the outer hood compresses the outer contact portion of the metal hood clamp, and the ground contact at the tip of the metal hood is strongly shielded. The cable is fixed to the metal jacket and shielded so that stress is not applied to the joint between the core wire and the contact socket, pressed against the conductor Body and the metal hood are electrically connected.

In another embodiment, the inner surface of the cylindrical portion of the caulking ring is inserted into the outer surface of the clamp portion of the jacket hood so that the locking projection engages with the locking groove of the caulking ring. When the caulking ring is rotated forward while engaging the locking groove, the tapered portion on the inner surface of the caulking ring compresses the tip of the clamp portion of the outer hood made of a flexible material in the inner diameter direction, and The inner surface of the clamp part of the metal hood compresses the outer contact part of the clamp part of the metal hood in the inner diameter direction, the ground contact part at the tip of the clamp part of the metal hood is strongly pressed against the shield conductor of the cable, and the core wire and the contact socket are joined. The cable is fixed to the metal jacket so that stress is not applied to the portion, and the shield conductor and the metal hood are electrically connected.

When the caulking ring is pulled back in this state, the locking projection is fitted into the locking recess of the caulking ring, and the caulking ring is fixed at that position.

Since the outer hood and the clamp portion of the metal hood have a plurality of cuts in the axial direction, they are easily bent in the inner diameter direction by the inner diameter force at the tip portion. By setting the maximum diameter and the minimum diameter of the taper portion and the cut width of the clamp portion to predetermined dimensions, it is possible to fix cables having various diameters.

[0026]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial structural perspective view for explaining an EMI countermeasure connector and a ground terminal processing method according to a first embodiment of the present invention, and FIG. 2 is a sectional view thereof.

A contact socket having a built-in female contact which is electrically connected to the core wire 16b of the cable 16 by being connected to a male contact of an external back wiring board, the contact socket is held, and a ground conductor portion of the back wiring board is provided. The plastic shell on which the ground plate for grounding the metal hood (bottom) is disposed in contact with the plastic shell is the same as that of the conventional example, and the description thereof will be omitted.

Metal hood (top) 11, metal hood (bottom)
Semi-cylindrical clamps 11a and 12a are formed in the cable introduction portion 12 so that the metal hood (upper) 11 and the metal hood (lower) 12 are cylindrical when they are engaged.

The clamps 11a and 12a are provided with a plurality of cuts 11b and 12b from the distal end to the vicinity of the base, and the distal ends of the clamps 11a and 12a are bent inside the cylindrical shape and formed at the distal end. Are provided with ground contact portions 11c and 12c having a portion parallel to the axis of the cylindrical shape, and provided with convex outer contact portions 11d and 12d bulging to the outside of the cylindrical shape adjacent to the base side thereof. ing.

Metal hood (upper) 11, metal hood (lower)
The outer cover hood (upper) 13 and the outer cover hood (lower) 14 that are covered by the cover 12 are made of a flexible material such as plastic, and the outer cover hood (upper) 13 and the outer cover hood (lower) 14. The portion of the metal hood that is in contact with the clamp portion has a semi-cylindrical clamp portion 13a so as to be cylindrical when engaged.
14a are formed.

The clamps 13a and 14a are provided with a plurality of cuts 13b and 14b from the distal end to the vicinity of the base, and the inner surfaces of the clamps 13a and 14a have the outer diameters of the outer contact portions 11d and 12d of the metal hood clamp. It is formed in a smooth cylindrical shape with an approximate inner diameter, and external threads are formed on the outside.

The outer hood (upper) 13 and the outer hood (lower)
A female screw portion 15a that can be screwed with a male screw provided on the clamp portion 13a of the outer hood is threaded in a predetermined range from one end of the inner surface of the caulking ring 15 for engaging the clamp portion with the female member 14; From the other end of the inner surface of the caulking ring 15, the portion connected to the screw portion is set as the screw outer diameter, and the conical tapered portion 1 is formed so that the caulking ring end surface portion has a predetermined small diameter.
5b is provided.

FIG. 2A shows the clamp 13 of the jacket hood.
a, the state where the caulking ring 15 is not attached to 14a,
FIG. 2B shows that the caulking ring 15 has the clamp portions 13a and 1a.
FIG. 4a shows a state in which it is screwed.

The clamp portion 11 of the metal hoods 11 and 12
The exposed and folded shield conductor 16a is arranged outside the cable 16 so as to correspond to the ground contact portions 11c and 12c of the a and 12a. When the caulking ring 15 is screwed together with the internal thread portion 15a on the inner surface of the caulking ring 15 and the caulking ring 15 is rotated forward, the taper portion 15b on the inner surface of the caulking ring is made of a flexible material. Clamp portion 13a of the hood,
The tip of the male screw 14a is compressed in the inner diameter direction, and the inner surfaces of the clamp portions 13a, 14a of the outer hood compress the outer contact portions 11d, 12d of the clamp portion of the metal hood in the inner diameter direction. Ground contact part 1
1c and 12c are strong and the shield conductor 16a of the cable 16
The cable 16 is fixed to the metal hoods 11 and 12 so that stress is not applied to the joint between the core wire 16b and the contact socket.
Are electrically connected to the shielded conductors 16a that are folded back to the outside.

The outer hood and metal hood clamps 11a, 12a, 13a, and 14a have a plurality of cuts 11b, 12b, 13b, and 14b in the axial direction. Bend in the inner diameter direction.

The maximum and minimum diameters of the tapered portion 15b and the cut portions 11b, 12b, 13b, 14 of the clamp portion.
By setting the width of b to a predetermined dimension, it is possible to cope with fixing cables of various diameters.

FIG. 3 is a partial structural perspective view for explaining an EMI countermeasure connector and a ground terminal processing method according to a second embodiment of the present invention, and FIG. 4 is a front sectional view and a top view thereof. The second embodiment is the same as the first embodiment except for the structure of the clamp portion of the jacket hood and the caulking ring.
Only the differences will be described.

Metal hood (upper) 31, metal hood (lower)
The outer cover hood (upper) 33 and the outer cover hood (lower) 34 which are covered by the cover 32 are made of a flexible material such as plastic, and the outer cover hood (upper) 33 and the outer cover hood (lower) 34. Semi-cylindrical clamps 33a and 34a are formed in portions of the metal hood that are in contact with the clamps 31a and 32a so as to be cylindrical when engaged.

The clamps 33a and 34a are provided with a plurality of cuts 33b and 34b from the distal end to the vicinity of the base. The inner surfaces of the clamps 33a and 34a have the outer diameters of the outer contact portions 31d and 32d of the metal hood clamp. It is formed in a smooth cylindrical shape with an approximate inner diameter, and the outer surface is also a smooth cylindrical shape, and a columnar locking projection 33c is formed at a predetermined position.

Outer hood (upper) 33 and outer hood (lower)
A predetermined range from one end of the inner surface of the caulking ring 35 for engaging the clamp portion with the cylindrical portion 35 becomes a cylindrical portion 35a slidable with the outer surfaces of the clamp portions 33a and 34a of the outer hood. The cylindrical part 35 from the other end
a and the conical tapered portion 3 so that the end face of the caulking ring has a predetermined small diameter.
5b is provided.

A locking groove 35c into which the locking projection 33c of the clamp portion of the jacket hood can be inserted is spirally cut from the end surface of the cylindrical portion 35a to a predetermined position.
Are provided with a plurality of locking recesses 35d on the side wall on the end face side.

FIG. 4A shows the clamp portion 33 of the jacket hood.
a, 34a shows a state in which the caulking ring 35 is not mounted,
FIG. 4B is a top view of the clamp portion 33a of the jacket hood.

The clamp portions 31 of the metal hoods 31 and 32
A shield conductor 36a which is exposed and folded back to the outside of the cable 36 is disposed so as to correspond to the ground contact portions 31c, 32c of the a, 32a, and is provided on the outer surfaces of the clamp portions 33a, 34a of the jacket hood. The caulking ring 35 is disposed in advance through the cable 36 so that the projection 35c engages with the locking groove 35c of the caulking ring 35.
Inserting the inner surface of the cylindrical portion 35a and rotating the caulking ring 35 forward while engaging the locking projection 33c with the locking groove 35c, the tapered portion 35b on the inner surface of the caulking ring is made of a flexible material. Clamped part 33 of jacket hood
a, 34a are compressed in the inner diameter direction, and the inner surfaces of the clamp portions 33a, 34a of the outer hood compress the outer contact portions 31d, 32d of the clamp portion of the metal hood in the inner diameter direction. Ground contact portion 31c,
32c is strongly pressed against the shield conductor 36a of the cable 36, and the cable 36 is fixed to the metal hoods 31, 32 so that stress is not applied to the joint between the core wire 36b and the contact socket, and the shield is folded back to the outside of the cable 36. Conductor 36a and metal hood 31,
32 are electrically connected. When the swaging ring 35 is pulled back in this state, the locking projections 33c are fitted into the locking recesses 35d of the swaging ring, and the swaging ring 35 is fixed at that position.

The outer hood and the clamps 31a, 32a, 33a, 34a of the metal hood have a plurality of cuts 31b, 32b, 33b, 33b in the axial direction. Bend in the inner diameter direction.

The maximum and minimum diameters of the tapered portion 35b and the cut portions 31b, 32b, 33b, 33 of the clamp portion.
By setting the width of b to a predetermined dimension, it is possible to cope with fixing cables of various diameters.

[0046]

The EMI countermeasure connector and the ground terminal processing method according to the present invention can provide the following effects by the above configuration and operation. That is, 1. Since it can handle cables of various diameters, there is no need to prepare various types of connectors.

2. Work is easy because no tools are required for installation.

3. The connector can be securely fixed without applying stress to the joint between the core wire and the contact socket.

4. Simultaneously with fixing the cable, the shield conductor of the cable can be reliably and easily electrically connected to the metal hood.

[Brief description of the drawings]

FIG. 1 is a partial structural perspective view for explaining an EMI countermeasure connector and a ground terminal processing method according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view for explaining an EMI countermeasure connector and a ground terminal processing method according to the first embodiment of the present invention.
(A) shows a state in which the caulking ring is not mounted on the clamp portion. (B) shows a state in which the caulking ring is screwed into the clamp portion.

FIG. 3 is a partial structural perspective view for explaining an EMI countermeasure connector and a ground terminal processing method according to a second embodiment of the present invention.

FIG. 4A is a partial cross-sectional view for explaining an EMI countermeasure connector and a ground terminal processing method according to a second embodiment of the present invention. (B) is a partial top view for explaining the EMI countermeasure connector and the ground terminal processing method according to the second embodiment of the present invention.

FIG. 5 is a perspective view showing a relationship between respective parts of an EMI countermeasure connector and a ground terminal processing method in a conventional example.

[Explanation of symbols]

 Reference Signs List 11 metal hood (upper) 11a clamp 11b cut 11c ground contact 11d outer contact 12 metal hood (lower) 12a clamp 12b cut 12c ground contact 12d outer contact 13 outer hood 13a Clamp portion 13b Cut portion 14 Outer hood (lower) 14a Clamp portion 14b Cut portion 15 Caulking ring 15a Female thread portion 15b Tapered portion 16 Cable 16a Shield conductor 16b Core wire 31 Metal hood (upper) 31a Clamp portion 31b Cut portion 31c Ground contact portion 31d Jacket contact portion 32 Metal hood (bottom) 32a Clamp portion 32b Cut portion 32c Ground contact portion 32d Jacket contact portion 33 Jacket hood (upper) 33a Clamp portion 33b Cut portion 33c Locking projection 4 Outer hood (lower) 34a Clamp portion 34b Cut portion 35 Caulking ring 35a Cylindrical portion 35b Tapered portion 35c Lock groove 35d Lock recess 36 Cable 36a Shield conductor 36b Core wire 51 Contact socket 52 Plastic shell 53 Ground plate 54 Metal hood (Lower) 55 Metal hood (Upper) 56a Cable clamp 56b Aluminum foil 56c Small screw 56d Pedestal 57a Lead wire with lug terminal 57b Small screw 57c Pedestal 58a Metal U-shaped clamp 59 Cable 59a Shield conductor 59b Core wire

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H01R 13/648-13/658 H01R 23/02 H01R 13/56-13/58 H01R 17/04 H01R 9 / 08

Claims (4)

(57) [Claims] 1. A contact socket containing a female contact connected to a core wire of a cable, and a ground plate holding the contact socket and contacting an external ground conductor to ground a metal hood. An EMI countermeasure connector comprising a plastic shell and two upper and lower metal hoods that are engaged with the plastic shell and connected to a shield conductor of a cable and ground terminal processing, wherein a cable introduction portion of the two metal hoods is provided. In addition, a semi-cylindrical clamp portion is formed so as to be cylindrical when engaged, and the clamp portion is provided with a plurality of cuts from the distal end to near the base portion. A grounding contact portion which is bent inside the cylindrical shape and has a portion parallel to the axis of the cylindrical shape at the end portion, and a base portion of the grounding contact portion Adjacent and outside the contacted portion of the bulged convexly provided on the outside, each of the said metal hood jacket hood bordered covered in the,
The outer hood is made of a flexible material such as plastic, and the portion of the outer hood that is in contact with the clamp portion of the metal hood has a semi-cylindrical shape so as to be cylindrical when engaged. A clamp portion is formed, the clamp portion is provided with a plurality of cuts from the tip to the vicinity of the base, and the inner surface of the clamp portion has a smooth cylindrical shape with an inner diameter similar to the outer diameter of the jacket contact portion of the metal hood. An external thread is formed on the outside, and a predetermined range from one end of the inner surface of the caulking ring for engaging the clamp portion of the outer hood is provided on the clamp portion of the outer hood. A female screw that can be screwed with a male screw is threaded, and from the other end of the inner surface, a portion connected to the screw portion is set as a screw outer diameter, and a conical taper portion is provided so that a ring end surface portion has a predetermined small diameter. EM characterized by being Connector for I measures. 2. The EMI countermeasure connector according to claim 1, wherein the outer surface of the clamp portion of the jacket hood is a smooth cylindrical shape, and a columnar locking projection is formed at a predetermined position thereof. In a predetermined range from one end of the inner surface of the caulking ring, a cylindrical portion slidable with the outer surface of the clamp portion of the outer hood is provided, and a connecting portion with the cylindrical portion is formed from the other end of the inner surface with the inner diameter of the cylindrical portion. And a conical taper portion is provided so that the end face portion of the caulking ring has a predetermined small diameter, and the locking projection of the clamp portion of the jacket hood can be inserted into the cylindrical portion. An EMI countermeasure connector, wherein a locking groove is spirally cut from an end face thereof to a predetermined position, and a plurality of locking recesses are provided on a side wall on an end face side of the locking groove. 3. The ground terminal processing method using the EMI countermeasure connector according to claim 1, wherein the cable is exposed to correspond to the ground contact portion provided on a clamp portion of the metal hood. The shield conductor folded outside is arranged, and the male screw part of the jacket hood covered by the metal hood is screwed with the female screw part of the caulking ring previously penetrated through the cable to rotate forward. The grounding terminal processing method, wherein the cable is fixed to the metal hood, and the shield conductor and the metal hood are electrically connected. 4. A method of processing a ground terminal using an EMI countermeasure connector according to claim 2, wherein the cable is exposed to correspond to the ground contact portion provided on a clamp portion of the metal hood. Arranging the shield conductor folded outward, engaging the locking projection of the outer hood covered by the metal hood with the locking groove of the caulking ring which is disposed in advance through a cable. The cable is fixed to the metal hood by fitting a caulking ring to the jacket hood and rotated forward, and the shield conductor and the metal hood are electrically connected. Ground terminal processing method to do.