JP3346510B2 - Board connector and shield shell used for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector to which a connector of a shielded cable is detachably connected.
The present invention relates to a board connector of a type installed on a board such as a PCB having a ground pattern and a shield shell used for the board connector.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view for explaining a connection structure between a conventional board connector of this type and a cable connector of a shielded cable.

A board connector 4 installed on a board 2 such as a PCB is accessible through an elongated opening 6a formed in a panel 6 having conductivity. On the panel 6, a rectangular tubular panel connector shell 8 having conductivity is fixed by conductive screws 7 so as to surround the opening 6a. The panel connector shell 8 is provided with a flange 8a on the side that comes into contact with the panel 6, thereby ensuring an electromagnetic shield near the opening 6a.

On the other hand, the shielded cable 10 is composed of a large number of electric wires 12, a braid disposed around the electric wires 12, and a shielding material 14 such as an aluminum foil tape, so that electromagnetic waves leak to the outside or conversely. Shields external electromagnetic noise from entering.

[0005] A cable connector 16 is attached to an end of the shielded cable 10. The cable connector 16 includes a conductive cable connector shell 18 provided so as to surround a not-shown contact arranged in an aligned manner. The cable connector shell 18 is electrically connected to the shield material 14 inside the cable connector 16.

Cable connector 16 and board connector 4
When mating, the cable connector shell 18 is electrically connected to the panel connector shell 8. Therefore, the electromagnetic waves captured by the shield material 14 of the shielded cable 10 are grounded via the cable connector shell 18, the panel connector shell 8, the screw 7, and the panel 6.

[0007]

However, according to such a prior art, a drawback is that the panel 6 must be specially provided to ground and escape the electromagnetic waves captured by the shield material 14 of the shielded cable 10. was there.

Further, since the path for grounding is provided by the cable connector shell 18, the panel connector shell 8, the screw 7 and the panel 6, the impedance is high, and therefore, there is a drawback that a stable shielding effect cannot be obtained.

Further, the panel connector shell 8 has a flange 8a for ensuring an electromagnetic shield near the opening 6a of the panel 6, so that a plurality of connectors cannot be mounted at a high density. There was also.

[0010]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, in which a shielded cable can be grounded with a minimum number of components and an electromagnetic shield can be surely provided in the vicinity of the contact portion of the contact. Is to provide a board connector.

It is another object of the present invention to provide a shield shell for such a board connector.

A first aspect of the present invention is a contact housing for installing a contact in a board connector which is mounted on a board such as a PCB having a ground pattern and to which a cable connector of a shielded cable is detachably connected, An insulative contact housing detachably attached to support fittings provided on both longitudinal sides of the ground pattern of the board by hooks formed on both sides in the longitudinal direction and fixed in proximity to the ground pattern; and A conductive shell capable of shielding the vicinity of the contact portion between the contact of the cable connector and the contact in the contact housing by being fixed over the periphery of the contact housing, wherein the surface of the shielded cable facing the cable connector is Seal of shielded cable Formed in outer inside dimensions of the connection lands and the contact housing are electrically connectable to means
And a shell having a spring piece elastically connected to a ground pattern of the board.

A second aspect of the present invention is a shield shell used for a board connector installed on a board such as a PCB having a ground pattern, wherein the shield shell is fixed by covering the periphery of a contact housing of the board connector. A body capable of electromagnetically shielding the vicinity of a contact portion between the connector contact and the board connector contact; a connection land whose surface facing the cable connector of the shielded cable is electrically connectable to the shield means of the shielded cable; And contact housing
A spring piece formed within the outer dimensions of the ring and elastically connected to the ground pattern of the board.

[0014]

When a shielded cable is connected to a board connector mounted on a board such as a PCB having a ground pattern, the shield means of the shielded cable is electrically connected to a connection land of a shell covering a contact housing of the board connector. .

The shell provides a grounding path from the shielded cable and covers the periphery of the contact housing of the board connector, thereby electromagnetically shielding the vicinity of the contact portion between the contact of the cable connector and the contact of the board connector.

Further, the shell has spring pieces elastically connected to the ground pattern of the board, through which the shield means of the shielded cable is grounded to the ground pattern of the board.

The spring piece of the shell can be brought into direct contact with the ground pattern of the board at a short interval, and a stable electromagnetic shield with low impedance can be obtained.

The spring piece of the shell can be formed within the outer dimensions of the contact housing, and it is not necessary to form a portion corresponding to the flange of the panel connector shell as in the prior art.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a board connector according to the present invention;

FIG. 1 is an exploded perspective view for explaining a method of connecting a shielded cable to a PCB using one embodiment of the board connector according to the present invention, and FIG. 2 is a perspective view of the book connector shown in FIG. 1 shows a board connector according to the invention,
(A)-(c) is a top view, front view, and right side view, respectively.

The PCB 20 is a conventionally known printed circuit board, and has a large number of contacts 22 connected to the contacts of the shielded cable 30 in two rows. PCB2
The ground pattern 24 is provided on the surface of the “0” so as to surround the many contacts 22.

On both sides in the longitudinal direction of the ground pattern 24, there are provided support fittings 26 for detachably fixing a contact housing 50 of the board connector 40 described later.

The board connector 40 according to the present invention generally includes a contact housing 50 and a metal shell 60 surrounding the contact housing 50.

The contact housing 50 is made of a rectangular tube-shaped insulating material, and has a recess 51 at the center for inserting the cable connector 32 of the shielded cable 30. In the recess 51 of the contact housing 50, a partition wall 53 is provided.
Has a number of holes 52 through which the contacts 22 erected on the PCB 20 pass (see FIG. 5).

Hooks 54 are formed on both sides in the longitudinal direction of the contact housing 50 so as to engage with the support fittings 26 fixed to the PCB 20. The support fitting 26 and the hook 54 may be of any structure as far as possible removably secure the contact housing 50 to the P CB20.

The shell 60 is formed by bending a metal thin plate punched into a predetermined shape so as to surround the contact housing 50. The surface of the shell 60 facing the cable connector 32 of the shielded cable 30 is a connection land 62 that can be electrically connected to the shield means of the shielded cable 30. In the embodiment shown, the shielded cable 30 has a spring piece (not shown) electrically connected to the shielding means inside the cable connector 32 and elastically connected to the connection land 62 of the shell 60. are doing. Connect the cable connector 32 of the shielded cable 30 to the contact housing 5
0 when fitted into the recess 51 of the shield cable 3
The plurality of zero spring pieces are elastically joined to the connection lands 62 of the shell 60. Thus, the electromagnetic waves captured by the shield means of the shielded cable 30 are transmitted to the shell 60 without leaking to the outside.

In the preferred embodiment shown, the shell 6
0 has a cantilever-shaped latch spring 66 cut out by a slit 64 formed on the side surface, and engages with a convex portion 36 formed on the corresponding side surface of the cable connector 32, The cable connector 32 is securely held in the recess 51 of the contact housing 50. This eliminates the need to separately provide a mechanism for detachably fixing the cable connector 32 to the contact housing. To release the engagement between the locking spring 66 and the convex portion 36,
This is performed by sliding the engagement release member 38 in the direction of arrow A in FIG.

The surface of the shell 60 facing the PCB 20 has a corrugated conductive strip 6 along both sides of the recess 51.
8 is fixed. The curved contact portion 68a of the strip 68 has an appropriate elasticity in the moving direction when the board connector 40 is fixed to the PCB 20. Therefore, P
When the hook 54 of the contact housing 50 is engaged with the support fitting 26 of the CB 20, the plurality of contact portions 68 a of the strip 68 are formed on the ground pattern 24 of the PCB 20 at a large number of portions and at short intervals from each other with a moderate contact pressure. Make contact. Thereby, the electromagnetic waves captured by the shield means of the shielded cable 30 and the shell 60 are transmitted to the ground pattern 24 of the PCB 20 without leaking to the outside regardless of the frequency.

In another embodiment of the present invention shown in FIG. 4, a plurality of discrete spring pieces 70 are secured to the PCB 20 facing surface of shell 60 instead of strip 68. The spring piece 70 is different from the strip 68 in that
The board connector 40 can be largely elastically deformed in the direction in which the board connector 40 is fixed to the PCB 20, and a small fixing force is required.

In a further embodiment of the invention shown in FIG. 5, a cantilevered ground spring 72 formed on the surface of the shell 60 facing the PCB 20 includes a strip 68.
Is provided instead of The grounding spring 72 simply obtains the same function and effect as the spring piece 70 simply by forming a slit in the shell 60 and bending it into a predetermined shape.

Since the strip 68, the spring piece 70 and the ground spring 72 are formed within the outer dimensions of the contact housing 50, they form a portion corresponding to the flange 8a as in the prior art shown in FIG. No need. Therefore, a plurality of board connectors can be mounted at a high density.

[0032]

The present invention is directed to a contact housing for mounting contacts in a board connector which is mounted on a board such as a PCB having a ground pattern and to which a cable connector of a shielded cable is detachably connected . The hooks formed on both sides
On both sides of the ground pattern
Detachable to the support bracket that was set up, and for the ground pattern
An insulative contact housing fixed in close proximity ;
By being secured over the periphery of the contact housing, the vicinity of the contact portion between the contacts in the contact of the cable connector and the contact housing a shieldable conductive shell, the shielded cable
Connection land 及 the facing surface of the cable connector is electrically connectable to the shield means of a shielded cable
And a shell having a spring piece elastically connected to the ground pattern of the board and the board.
The shielded cable can be grounded with a minimum number of components, and the electromagnetic wave can be reliably shielded in the vicinity of the contact portion of the contact. Therefore, unlike the related art, there is no need to provide a panel for grounding, so that the manufacturing is simplified and a reliable electromagnetic shield can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view for explaining a method of connecting a shielded cable to a PCB using one embodiment of a board connector according to the present invention.

FIGS. 2A to 2C are a plan view, a front view, and a right side view, respectively, showing the board connector according to the present invention shown in FIG.

FIG. 3 shows a shield shell used in the board connector shown in FIG. 1, wherein (a) to (e) are a plan view, a front view, a bottom view, a right side view, and E in FIG. FIG. 14 is a sectional view taken along line E.

FIG. 4 is a front view of another embodiment of the board connector according to the present invention.

FIG. 5 is a perspective view of still another embodiment of the board connector according to the present invention.

FIG. 6 is a perspective view illustrating a connection structure between a conventional board connector and a connector of a shielded cable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 PCB 22 Contact 24 Ground pattern 30 Shield cable 32 Connector 34 Spring piece 36 Convex part 40 Board connector 50 Contact housing 51 Depression 52 Hole 54 Hook 56 Shell 62 Connection land 64 Slit 66 Hook spring 68 Strip 70 Spring piece 72 Ground spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-29045 (JP, A) JP-A-2-183979 (JP, A) JP-A-3-48878 (JP, U) JP-A-3-3 97876 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 13/648 H01R 24/08

Claims (6)

(57) [Claims] 1. A board connector which is installed on a board such as a PCB having a ground pattern and to which a cable connector of a shielded cable is detachably connected.
An insulating contact housing that is detachably attached to support brackets provided on both sides in the longitudinal direction of the ground pattern of the board by hooks formed on both side surfaces in the longitudinal direction, and is fixed close to the ground pattern; ;
And a conductive shell that is fixed to cover the periphery of the contact housing so as to be able to shield the vicinity of the contact portion between the contact of the cable connector and the contact in the contact housing, and the cable connector of the shielded cable. The surface facing the terminal is formed within the outer dimensions of the connection land and the contact housing, which are electrically connectable to the shielding means of the shielded cable.
And a shell having a spring piece elastically connected to a ground pattern of the board. 2. The board connector according to claim 1, wherein said spring strips are provided by corrugated strips secured to a bottom wall of said shell facing said board. 3. The board connector according to claim 1, wherein the spring piece is provided by a cantilevered ground spring cut by a slit formed in a bottom wall of the shell facing the board. A board connector, characterized in that: 4. The board connector according to claim 1, wherein the shell has a cantilever-shaped latching spring cut out by a slit formed on a side surface, Thus, a board connector characterized in that the cable connector fitted to the board connector is detachably hooked. 5. The board connector according to claim 1, wherein the spring piece is formed within an outer dimension of the contact housing. 6. A shield shell used for a board connector installed on a board such as a PCB having a ground pattern, wherein the shield shell is fixed over a contact housing of the board connector so that the contact of the connector and the board connector are provided. A main body capable of electromagnetically shielding the vicinity of the contact portion with the contact; a connection land whose surface facing the cable connector of the shielded cable is electrically connectable to the shielding means of the shielded cable; and an outer shape of the contact housing. A spring piece formed within dimensions and resiliently connected to a ground pattern of the board.