JP3423786B2 - Double shielded connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double shielded connector having a complete shield for a rectangular connector having a large number of connecting terminals, and more particularly to a structure of an inner shield case of the double shielded connector.

[0002]

2. Description of the Related Art Conventionally, in various electronic devices, a shielded connector in which the periphery of the connector is covered with a shield case has been used as a countermeasure against noise induced in a connecting portion of the connector. A typical example of the single shield connector is disclosed in Japanese Utility Model Laid-Open No. 3-79175, "Connector".

On the other hand, recently, many electronic devices use a high frequency, and a single shield cannot obtain a sufficient shielding effect. Therefore, in order to secure the shield effect, a double shielded connector having a double shield has been developed.

FIG. 5, FIG. 6 and FIG. 7 show a double shielded connector 31.
The one disclosed in Japanese Patent No. 4 is representative.

That is, the structure is a connector socket which is connected to a socket having a round shape, and has an insulating body 33 having a contact storage hole 32 formed in a cylindrical shape on a central axis of a square shape, and an insulating body 33. The outer shield case 34 that engages so as to cover the outer periphery of the quadrangular shape, the columnar portion 35 that is formed into a columnar shape and has a size that substantially fits in the contact storage hole 32, and the columnar portion 35 and the contact storage hole. The inner shield case 36 has a substantially columnar shape and is engaged with the inner shield case 36.

The outer shield case 34 is formed in a quadrangular shape having an opening on the lower side so as to substantially cover the quadrangular insulating body 33, and has a structure in which a grounding terminal 37 is projectingly formed at an end portion on the opening side. ing.

The cylindrical portion 35 is composed of a female connection hole 38 and a plurality of female contacts (not shown) arranged in the female connection hole 38. The female connection hole 38 is composed of a plurality of holes into which male contacts (not shown) on the plug side can be engaged. One end of each of the plurality of female contacts is formed in a tubular shape, the other end is formed in a rod-shaped connection terminal 39, and the one end formed in a tubular shape is inserted into the female connection hole 38 and engaged and locked,
The connection terminal 39 at the other end can be projected to the outside of the insulating body 33.

The inner shield case 36 is formed such that the tip has an enlarged diameter so as to cover the columnar portion 35, a first ground terminal 40 is projectingly formed at the rear end thereof, and a second ground terminal 41 is provided on the lower side. Has a structure that is formed to project.

The inner shield case 3 having such a structure
6 and the outer shield case 34 are arranged so that the shield effect at the connection terminal of the connector can be improved.

[0010]

However, in the conventional connector described above, since the structure of the inner shield case is formed in a cylindrical shape with both sides open, or a rectangular shape, the connector insertion direction is The front end side of the connector can be blocked by the mating connector to maintain the shielding effect, but it is exposed to the connection part such as the signal cable connected to the connection terminal hole on the rear end side of the connector. It has been pointed out that there is a problem that it cannot support the high frequencies in modern times because it has a structure without an inner shield.

Further, in order to shield the connection portion of the signal cable or the like, the process and the structure of the inner shield case are inevitably increased, and the application is extremely limited.
It has also been pointed out that there is a problem that it can be applied only to a connector having a heavy shield structure.

Therefore, the present invention is a connector having a double shield structure, and in particular, the structure of the inner shield case is manufactured,
There is a problem that must be solved to make it easy to process, assemble, etc. and to realize it at low cost.

[0013]

In order to solve the above-mentioned problems, a double shielded connector according to the present invention is (1) forward
Main housing with a plug insertion hole on the back and an open rear
And the inner surface of the main housing with no gap
Is formed in the shape of a rectangular box of an insulator, and the main housing is
Connector housing that is stored from the rear of the
Made housing and the inner surface of the connector housing
Is formed in a rectangular tubular shape with a conductive plate so as to cover the
Inner seal of the conductor stored from the front of the connector housing
Plug case surrounded by the inner case and the inner shield case.
Protruding from the rear of the connector housing into the space for use
A plurality of conductive contact pieces are arranged parallel to each other on the surface of the insulating flat plate.
The plug contact portion formed in a row and the main housing
Outer shield formed of conductive plate to cover the entire ging
A connector including a case, the inner shield case
The rear part for passing the plug contact part,
Make the opening of the minimum size through which the plug contact part passes.
That is.

(2) In the front part of the inner shield case
Is provided with a collar portion opened at a right angle to the outside, and this collar portion is
Front edge of connector housing and mouth of main housing
It is pinched and fixed between the rear end of the section
The double shielded connector according to (1). (3) Providing claws on the lower left and right of the inner shield case,
The double shielded connector according to (1) or (2), characterized in that slits for guiding the respective claw portions are provided at lower left and right sides of the connector housing.

[0015]

The plug contact portion surrounded by the inner shield case disposed inside the socket of the double shield connector having the above-mentioned basic structure is doubly shielded by the inner inner shield case and the outer outer shield case. . As a result, it is completely shielded from electric and magnetic fields, and thus
The shield effect is increased.

Further, in the socket, the rear portion of the inner shield case has a minimum size for passing the plug contact portion.
Since the opening is increased, the area to be shielded is increased, so that the shield effect is enhanced. In addition, this molding is
Since it is integrally molded, the manufacturing process is simple and fast.

Further, when the flange portion is provided on the front portion of the inner shield case, this flange portion is sandwiched between the front edge of the connector housing and the rear end of the plug insertion portion of the main housing, and as a result, the inner shield case is formed. Can be easily fixed to.

Further, since the socket can be assembled surely and easily by the engagement of the claw portion and the slit provided on each component, it can be carried out easily and in a short time.

[0019]

Embodiments of the double shielded connector according to the present invention will be described below. Since the double shielded connector according to the present invention is characterized by the structure of the socket, the socket will be mainly described below.

As shown in FIGS. 1, 2 and 3, the present socket includes a main housing 1 which is a housing having a cavity of an insulator, and a connector housing 2 which is made of an insulator and accommodated in the main housing 1. And an inner shield case 3 made of a conductive plate housed in the connector housing 2, and an outer shield case 5 made of a conductive plate so as to cover the main housing 1. The respective configurations will be described below item by item in the order of [1] main housing 1, [2] connector housing 2, [3] inner shield case 3, [4] outer shield case 5, [5] socket assembly. .

[1] Main housing 1 As shown in FIG. 1, the main housing 1 is formed in a connector assembly integrally molded with an insulator together with housings of other connectors, and a plug is inserted from the front. A plug insertion portion 6, a frame portion 7 for locking the outer shield case 5, and a rectangular tubular portion 8.

The plug insertion portion 6 is a plug insertion hole,
The inner surface thereof forms a plug insertion space together with the inner surface of the inner shield case 3 housed in the connector housing 2.

The frame portion 7 has a structure in which locking portions 7a and 7b for locking the front edge of the outer shield case 5 which is placed on the outside of the cylindrical portion 8 are provided.

The tubular portion 8 is formed in a rectangular tubular shape, and its size is such that the connector housing 2 accommodating the inner shield case 3 is smoothly slid from the rear side to be accommodated therein. Grooves 10a and 10b extending in the front-rear direction are provided in the tubular portion 8 at appropriate positions on the left and right. This groove 10a, 10
The b has a role of fixing the connector housing 2 by giving a certain degree of flexibility to the tubular portion 8 and engaging with projections 19a and 19b of the connector housing 2 described later.

Further, as shown in FIG. 2, terminals 12, 13 to be described later are provided at the rear edge of the lower plate 8a forming the tubular portion 8.
In order to regulate the position of the terminal, a terminal regulating portion 11 having a plurality of slits having a notch on the free end side is provided.

Further, as shown in FIG. 2, the ground terminals 18 of the inner shield case 3 are provided on the left and right sides inside the tubular portion 8.
slits 8 for guiding a, 18b (see FIG. 1)
b and 8c are provided.

Mainly as shown in FIG. 1, slits 8d and 8e for guiding the ground terminals 26a and 26b of the outer shield case 5 are provided at the portions of the main housing 1 which come into contact with the left and right outer surfaces of the tubular portion 8. There is.

[2] Connector housing 2 The connector housing 2 is, as shown in FIGS.
It is formed in a box-shaped housing made of an insulating material, and is sized so as to be slidably fitted into the inner surface of the tubular portion 8 of the main housing 1.

The connector housing 2 has a structure in which the plug contact portion 4 is integrally formed from the rear surface.

The plug contact portion 4 is formed in a flat plate shape, and when the inner shield case 3 is housed in the contact housing 2, the plug contact portion 4 comes into contact with the plug in the center of the space for plug insertion surrounded by the inner shield case 3. The structure is as follows.

As shown in FIG. 1, the plug contact portion 4 formed in a flat plate shape has a plurality of upper and lower terminals 12 and 13 which are slender conductive contact pieces arranged back to back in parallel to each other on a plane. Connection part 4 to arrange
The structure is such that a flat plate insulating plate 24 having a is provided.
In the plug contact portion 4 having such a structure, when the plug is inserted into the socket in the longitudinal direction (front-back direction) of the contact piece, the corresponding contact pieces come into contact with each other.

Further, as shown in FIG. 1, slits 17a and 17b having a predetermined length are provided in the front-rear direction between both ends of the lower plate 15 of the connector housing 2 and the left and right side plates 16. There is. The slit 17 is for guiding the ground terminals 18a and 18b of the inner shield case 3 during assembly.

Further, the upper surface (and the lower surface) of the connector housing 2 is provided with projections 19a and 19b. The protrusions 19a and 19b are formed on the connector housing 2
When the connector housing 2 is completely inserted into the main housing 1 when the connector housing 2 is completely housed in the main housing 1, when the connector housing 2 is completely inserted into the main housing 1, the grooves 10a and 10b of the main housing 1 are engaged. become.

[3] Inner Shield Case 3 The inner shield case 3 is integrally formed of a metal plate into a rectangular tubular shape as shown in FIGS. The size of the inner shield case 3 is formed so that it can be slid and inserted into the inner surface of the connector housing 2.

The inner shield case 3 has ground terminals 18a and 18b protruding from the lower ends of the rear portions of the left and right side plates.
When the inner shield case 3 is inserted into the connector housing 2, the ground terminals 18a and 18b are inserted from the inlets of the slits 17a and 17b of the connector housing 2, and the inner shield case 3 is pushed rearward, whereby the ground terminal 1
8a and 18b are guided by the slit 17 and slide backward, so that the inner shield case 3 is smoothly and easily housed in the connector housing 2.

Further, the front ends of the upper plate and the lower plate of the inner shield case 3 are bent at right angles outwardly by a width corresponding to the thickness of the upper plate and the lower plate of the connector housing 2, respectively. To form. This collar part 2
When the connector housing 2 accommodating the inner shield case 3 is inserted into the main housing 1, 0 and 21 are sandwiched between the rear end of the plug insertion portion 6 of the main housing 1 and the front end of the connector housing 2, and the inner shield case Performs the function of fixing 3.

Further, the upper plate, the lower plate and the left and right side plates of the inner shield case 3 are provided with contact pieces 22a, 22b, 22c and 22d and half lock portions 22e and 22f which come into contact with the ground portion of the inserted plug. It has a structure,
The joint surface of the upper plate, the lower plate, and the left and right side plates is the stopper portion 22.
The structure is engaged by g. Contact pieces 22a, 22b, 22c, 22d provided on the upper and lower plates
Has a shape in which three sides are cut into a tongue shape and cut and raised inside. Half lock part 2 provided on the left and right side plates
2e and 22f have a shape in which cuts are provided at predetermined intervals in a predetermined direction, and a portion surrounded by the cuts is elastically formed by projecting and deforming inward.

Further, what is characteristic of the inner shield case 3 is that, as shown in FIG. 3, the rear portion thereof has an opening 23 of a minimum size for allowing the plug contact portion 4 to pass therethrough.
Is. Thereby, the shield effect is remarkably improved. The work of creating the opening 23 is performed in one action using a mold when the inner shield case 3 is integrally molded. The details will be described below.

In order to improve the shield effect without complicating the manufacturing process, it is necessary that the shield case made of a conductive material can be integrally molded.

That is, as shown in FIG. 4, in order to manufacture the inner shield case 3, one flat plate is formed into a substantially cross shape around the opening 23 as if a box without a lid were disassembled. At this time, the required ground terminals 18a, 18
b, the contact pieces 22a, 22b, 22c and 22d, the half lock portions 22e and 22f, the stopper portion 22g and the like are created in advance.

The thus-prepared, substantially cross-shaped flat plate is placed at a predetermined position around the opening 23 (in FIG. 4,
Bend upwards on the paper of Fig. 4 from the broken line of the rectangle)
By doing so, the assembly is completed by forming a rectangular tubular shape, bending the stopper portion 22g, and engaging and locking.

With such a structure, the size of the opening 23 at the rear part can be minimized according to the application, and thus the structure having an extremely excellent shielding effect can be formed.

[4] Outer Shield Case 5 The outer shield case 5 is a metal plate as shown in FIG. 1 so as to cover the upper surface and the left and right sides of the tubular portion 8 of the main housing 1 and the rear portions of the terminals 12 and 13. It is integrally molded into a shape. Protrusions 9 a and 9 b that engage with the holes of the main housing 1 are provided on the front portion of the upper plate of the outer shield case 5.

Also, on the left and right side plates of the outer shield case 5,
Ground terminals 26a and 26b are provided at the lower ends, and cut-and-raised contact pieces 27a and 27b are provided at the center, respectively. Ground terminal 2
When the outer shield case 5 is attached to the main housing 1, the slides 6a and 26b are slid while being guided by slits 8d and 8e (see FIGS. 1 and 2) provided in the lower plate of the main housing 1 to slide. Facilitates lateral positioning of the.

The contact pieces 27a and 27b have a function of fixing the outer shield case 5 to the main housing 1 and then fixing the outer shield case 5 so as not to move in the front-rear direction.

[5] Assembly of Socket A socket is assembled by the main housing 1, the connector housing 2 incorporating the plug contact portion 4, the inner shield case 3 and the outer shield case 5 as described above.

From the front of the assembled connector housing 2, the inner shield case 3 is connected to the ground terminals 18a, 1
8b is inserted by guiding the slits 17a and 17b. Connect the inner shield case 3 to the connector housing 2
When it is completely housed in, the collar portion 20 of the inner shield case 3,
21 contacts the front edge of the connector housing 2. At this time, the opening 3 of the inner shield case 23 may surround the periphery of the plug contact portion 4.

Next, the connector housing 2 accommodating the inner shield case 3 is connected to the rear of the cylindrical portion 8 of the main housing 1, and the ground terminals 18a and 18b are connected to the main housing 1.
Insert by guiding with the slit provided in.

In this case, the projections 19a and 19b provided on the upper and lower surfaces of the connector housing 2 push and open the rear portion of the main housing 1 and receive a resistance force therefor, but the connector housing 2 is opposed to this resistance force. When pushed, the protrusions 19a and 19b will be in the groove 1 of the main housing 1.
The main housing 1 is restored by being fitted into 0a and 10b, and as a result, the connector housing 2 is fixed.

Then, the outer housing case 5 is slid by engaging the ground terminals 26a and 26b with the slits of the main housing 1 to slide the main housing 1 therein.
To the outside of. When the projections 9a, 9b on the front upper part of the outer shield case 5 engage with the holes 7a, 7b provided in the frame portion 7 of the main housing 1, the attachment of the outer shield case 5 is completed, and at that time, the contact piece 27a, 27b
Thus, the front and rear directions of the outer shield case 5 are also fixed. In this way, the outer shield case 5 is fixed in the front-rear and left-right directions, so that it is not easily deformed.

[0051]

As described above, according to the double shield connector of the present invention, the rear portion of the inner shield case is
The minimum size of opening that allows the plug contact part to pass through
As a result, the connector with a large number of connection terminals can be securely
A heavy shield can be provided, and therefore, it is optimal as a connector for an electronic device that uses a large number of signals at high frequencies.

In the double shielded connector according to the present invention, the inner shield case is manufactured by integral molding.
Easy to assemble, it is low cost and cost effective.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an overall configuration of a double shielded connector according to the present invention.

FIG. 2 is a schematic perspective view showing how the connector housing is engaged with the main housing.

FIG. 3 is a perspective view showing an entire inner shield case.

FIG. 4 is a plan view before assembling the inner shield case.

FIG. 5 is a plan view of a double shielded connector in the related art.

FIG. 6 is a side view of the same.

FIG. 7 is a side view of the inner shield case.

[Explanation of symbols]

1 main housing 2 Connector housing 3 Inner shield case 4 Plug contact part 5 Outer shield case 6 Plug insertion part 7 Same frame 8 Same cylinder 9, 14, 19 protrusions 10 grooves 11 Terminal position restriction part 12 Upper terminal 13 Lower terminal 14 Rear hole of connector housing 2 15 Lower plate of connector housing 2 16 Side plate of connector housing 2 17 slits 18a, 18b Ground terminal 20, 21 Tsuba 22a, 22b, 22c, 22d Contact piece 22e, 22f Half lock part 22g stopper 23 Rear opening of inner shield case 3 24 insulating plate 25 stopper 26a, 26b Ground terminal 27 Stopper 31-36 connection terminals 37 Medium shield case 38 Outer shield case

Claims (3)

(57) [Claims] 1. A plug insertion hole is provided in the front and the rear is opened.
Main housing that has been opened and inner surface of the main housing
Is formed into a rectangular box shape of an insulator so that
A connector housed from the rear of the main housing
A rectangular plate is formed by a conductive plate so as to cover the housing formed of the housing and the inner surface of the connector housing.
It is formed in a cylindrical shape and is in front of the connector housing.
Inside the conductor's inner shield case and the space for plug insertion surrounded by the inner shield case.
Insulation flat plate protruding from the rear of the connector housing
Formed by arranging multiple conductive contacts on the surface of the
It is made of a conductive plate to cover the plug contact part and the entire main housing.
And a shielded outer shield case , wherein the inner shield case passes through the plug contact portion.
The rear of the plug contact portion through the minimum
A double shielded connector characterized by having an opening of a size . 2. The outside of the front part of the inner shield case
A flange that opens at right angles to the connector is provided.
Front edge of housing and rear end of mouth of main housing
The double shielded connector according to claim 1, wherein the double shielded connector is sandwiched between and fixed . 3. Claws on the lower left and right sides of the inner shield case
And the claws on the lower left and right sides of the connector housing.
A slit for guiding the portion is provided.
The double shielded connector according to 1 or 2.