JP3447439B2 - Housing cover for shielded connector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded connector housing cover for protecting an electronic circuit or an electronic component from the influence of an external magnetic field or an external electric field. 2. Description of the Related Art Conventionally, as shown in FIGS. 6 and 7, a plurality of contact pins a,.
There is known a printed board unit e in which a box-shaped housing b that holds. Is interposed between a printed board c and a shield board d. And these printed board units e, e
A connector (not shown) is used to connect a signal line from outside or between the printed circuit board unit e and the outside. On the other hand, the housing b is formed long so that a plurality of connectors can be engaged with each other, and a portion where the connector is not engaged when not in use is used to prevent dust and the like from adhering and preventing erroneous connection of the connector. It is shielded by the cover f. As shown in FIGS. 6 and 7, the conventional cover f has a locking dowel j projecting from an engaging plate i projecting from the back surface of a shielding substrate h having a knob g. By pushing the engagement plate j into the housing b, the gate-shaped engagement plate k provided on the side wall of the housing b is pressed and deformed outward against its spring property, and is opened on the engagement plate k. The engagement plate k is elastically restored when the engagement hole l and the locking dowel j coincide with each other.
Is locked, whereby the cover f shields the opening d 'of the shield plate d of the printed board unit e and the engagement recess m of the housing b. The cover f is pulled out of the housing b by pulling the cover and pulling out the engagement between the engagement hole l and the locking dowel j. However, in the above cover, a metal plate (not shown) having a contact spring is attached to the back side of the shielding substrate h. In the case where the contact spring is elastically contacted with the shield plate d to provide a shield function, the spring force of the contact spring at the time of engagement causes the engagement between the engagement hole 1 and the locking dowel j. Since the cover f works in a direction in which the stop comes off, the cover f comes out of the housing b, and there is a problem that a desired shielding effect cannot be achieved. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional cover, and is provided with a shielded connector housing cover provided with a contact spring and provided with a lock mechanism for the housing. For a connector with a shield that enables a reliable shielding effect to be exerted, and can be unlocked with one finger by a finger or a special extraction tool, and can be easily attached to and detached from the housing by an easy operation. It is intended to provide a housing cover. In order to achieve the above object, a shielded connector housing cover of the present invention holds a plurality of contact pins on a bottom wall and has an engagement hole on a front wall. In a cover for integrally providing an engagement plate and shielding a connector engagement recess of a housing fixed between a printed board and a shield plate, a cover plate includes a metal plate having a contact spring elastically contacting the shield plate. On both front and back surfaces of the shielding substrate attached to the back side, a grip plate portion and an engaging portion for the housing are formed so as to protrude symmetrically, and the cover main body is symmetrically protruded from the horizontal portion and the front end and the rear end of the horizontal portion. A locking plate having a locking dowel on the front surface and an inclined pressing piece integrally form a locking plate having a substantially half-crank side surface, and the locking plate is provided with the knob plate portion and the engaging portion. In the slit The supporting point is connected to a supporting plate standing on the substrate so that the supporting point is swung in the front-rear direction with the intersection between the horizontal part and the locking piece as a supporting point. And When the engaging portion of the cover body is pushed into a portion of the housing where the connector is not provided in the connector engaging concave portion, the engaging portion of the lock plate provided on the cover body protrudes from the front lower end of the locking piece. The locking dowel hits the upper end of the engaging plate provided on the front wall of the housing. The locking dowel has a horizontal locking surface and an inclined surface which is inclined downward from the front end of the locking surface to the rear of the lower end, while the engaging plate is provided at its upper end with the inclined surface. Since it is formed on an inclined surface that is inclined in the same direction as the surface, the two inclined surfaces abut against each other by pushing the engagement portion,
Due to the pushing force, the engagement plate is elastically deformed outward against the spring property. As a result, the engaging portion is pushed into the housing to a predetermined position, and when the engaging hole of the engaging plate and the locking dowel coincide, the engaging plate elastically returns to the original position. Then, the opening edge of the engagement hole and the horizontal locking surface of the locking dowel are locked to each other, the cover is locked to the housing, and the opening of the housing is shielded by the shielding substrate. At this time, the contact spring provided on the metal plate mounted on the back side of the shielding substrate is elastically contacted with the shield plate,
The spring force acts in the direction in which the cover comes off, but the spring force or the pulling force when a force in the pulling direction is applied to the cover causes the cover to be held without coming off. In the above-described locked state, when the inclined pressing piece of the lock plate is grasped together with the thumb plate with, for example, a thumb and an index finger, the lock plate is connected to the support plate portion standing upright from the shielding substrate. By swinging with the provided portion as a fulcrum and the locking piece displacing inward, the locking between the locking dowel and the engaging hole is released and the lock is released. Therefore, in this state, the cover can be pulled out of the housing by applying a pulling force. FIG. 1 is a perspective view of a printed circuit board unit and long and short covers according to an embodiment of the present invention, and FIG. 1 is a front view of the printed circuit board unit and a short cover. 2, FIG. 3 showing a side view of a printed board unit and a short cover, FIG. 4 showing a cross-sectional view in which a short cover is engaged with a housing, and a cross-sectional view showing a state in which the short cover is pulled out of the housing. This will be described in detail with reference to FIG. As shown in FIG. 1, the cover includes a long cover 1 which is long in the longitudinal direction of the connector engaging recess 24 in the housing 17 of the printed board unit A and a short cover 1a which is short. The two covers 1 and 1a each include a cover body 2 and a lock plate 3 integrally formed of a synthetic resin or the like. The cover body 2 includes a shielding substrate 4 having an opening in the connector engaging recess 24 of the housing 17,
A plate portion 5 erected at right angles to the center of the upper surface of the substrate 4;
The board 4 is vertically suspended downward from the front portion of the rear surface, and is integrally formed with the engaging portion 6 which is engaged with the engaging concave portion 24 of the housing 17. As shown in FIG. 3, the engaging portion 6 is formed in a substantially U-shaped cross section by the front plate 6a and the left and right side plates 6b, 6b. A metal plate 7 is stretched on the back surface of the shielding substrate 4, and a plurality of slanted lower ends on both left and right sides of the engagement portion 6 so as to be elastically contacted with a shield plate described later. The contact spring 7a is formed by cutting. On the other hand, the lock plate 2 includes a horizontal portion 8 and a locking piece 9 bent at a right angle downward from the front end of the horizontal portion 8.
An inclined pressing piece 10 that is erected from the rear end of the horizontal portion 8 to the upper rear side is formed in a substantially half-crank shape on the side surface.
At the lower end of the front surface of the locking piece 9, a locking dowel 11 is provided which protrudes from an engaging hole 27 opened in an engaging plate 25 provided on a front wall of the housing 17. . The lock plate 2 has an intersection 12 between the horizontal portion 8 and the locking piece 9 formed by a substantially frontal gate-shaped support plate 13 erected from the front surface of the shielding substrate 4. The horizontal part 8, the locking piece 9, and the inclined pressing piece 10, which are formed integrally with the cover main body 2 by being connected to the upper end and are other components as described above, are clearly described above as shown in FIG. 2. Front plate 6a of engaging portion 6, knob plate portion 5, slits 14, 1
By being separated by 5, it is configured to be swingable in the front-rear direction. The locking dowel 11 has an upward horizontal locking surface 11a and an inclined surface 11b which is inclined downward from the front end of the locking surface 11a to the rear. In the illustrated example, dowels 16, 16 used for removing the cover 1 from the housing 17 using a detachable tool (not shown) are protrudingly provided on both left and right sides of the front and rear surfaces of the knob plate portion 5. It is. As shown in FIG. 1, the printed board unit A
As is known, with the plurality of contact pins 18... Held on the bottom wall of the box-shaped housing 17 being inserted through the printed board 19, the housing 17 is mounted between the printed board 19 and the shield plate 20 with mounting brackets 21, 21 are interposed therebetween, and the printed board 19 and the shield plate 20 are integrally formed by fixing and fixing the screws 23 to a plurality of (four in the illustrated example) main columns 22. . The front wall 28 of the engagement recess 24 of the connector (not shown) recessed in the length direction of the housing 17
As described above, a plurality of engagement plates 25 for engaging the connector at predetermined intervals in the length direction are formed. Each of the engaging plates 25...
8, which is provided with a spring property so that it can be deformed in both the inside and outside directions and can return to the center position. The shield plate 20 has a connector engaging recess 24 of the housing 17 and each of the engaging plates 25.
Openings 20a and 20b corresponding to and are opened. That is, as shown in FIG. 1, the printed board unit A has the openings 20a and 20b that are long in the length direction of the shield plate 20 and one of the openings 20a and 20b.
a so that only one connector (not shown) is engaged with the housing 17 and a plurality of connectors (not shown) is engaged with the other opening 20b side. Is formed. Accordingly, the long cover 1 is provided with the shielding substrate 4
Is formed so that its length and width are set to be larger than those of the opening 20a by a predetermined dimension, whereby the opening 20a can be shielded. The long cover 1 is provided with a shielding substrate 4
Guide pieces 29, 2 from both ends in the longitudinal direction
9 is projected at a right angle, so that the two guide pieces 29, 29 are guided along both opening edges in the longitudinal direction of the opening 20a, so that the long cover 1 is , Without being inclined with respect to the engagement concave portion 24 of the housing 17 and securely pushed in a predetermined direction to be locked. On the other hand, the short cover 1a is
b, a plurality of engagement plates 25 of the housing 17 located in
The length of the shielding substrate 4 with respect to the length direction of the above-described opening 20b is formed short so that the opening can be selectively locked and only the opening of the portion without the connector is shielded. The width in the direction perpendicular to the opening is set to be wider by a predetermined dimension than that of the opening 20b. Therefore, according to the covers 1 and 1a described above, the opening of the housing 17 is shielded as follows. In the long cover 1, a pair of guide pieces 29, 29
With the locking piece 9 facing the engaging plate 25 of the housing 17 and positioned along the opening edges in the length direction of the opening 20a of the shield plate 20, the housing 1
7 into the engagement recess 24. On the other hand, in the case of the short cover 1a, the engaging piece 9 is aligned with the engaging plate 25 of the housing 17 so as to face the engaging plate 25, and then pushed into the engaging recess 20a of the housing 17. As a result, the locking dowel 11 of the locking piece 9 and the engaging hole 27 of the engaging plate 25 are locked as described above, and the covers 1 and 1a are locked by the housing 17. The opening 20a of the shield plate 20 and the engaging portion 24 of the housing 17 are completely shielded by the long cover 1. On the other hand, depending on the short cover 1a, the shield plate 2
The opening 20b of the “0” and a part of the engagement recess 24 of the housing 17 are shielded. In the above-described locked state (shown in FIG. 4), when the inclination suppressing piece 10 of the lock plate 3 is pressed and moved toward the knob plate portion 5, the connection portion 12 with the support plate portion 13 is used as a fulcrum. When the lock plate 3 swings clockwise in FIG. 5, the dowel 11 of the locking piece 9 is disengaged from the engagement hole 27, and the lock of the cover 1, 1a is released. Therefore, by pulling out in this state, the covers 1 and 1a can be pulled out from the housing 17, respectively. The present invention is constructed as described above. Therefore, even if the spring force of the contact spring of the metal plate elastically contacting the shield plate acts in the direction in which the cover comes off, the lock is achieved. The falling-off can be prevented by being locked to the housing by the plate, so that a reliable shielding effect is achieved, and simply pushing the housing into the housing or pressing the inclined pressing piece toward the knob plate portion side It can be detached by an easy operation such as pulling out, so it can be locked or one-touch with fingers or a pulling tool,
The lock can be released, and therefore the workability is very good.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a long cover and a short cover showing an embodiment of a shielded connector housing cover according to the present invention;
FIG. 4 is a partially cutaway perspective view showing a printed board unit. FIG. 2 is a front view showing a short cover and a partially cut-out printed board unit. FIG. 3 is a side view showing a short cover and a printed board unit. FIG. 4 is a cross-sectional view showing a state in which a short cover is engaged and locked with a housing. FIG. 5 is a cross-sectional view showing an unlocked state of the short cover. FIG. 6 is a perspective view showing a conventional housing cover and a printed board unit with a part cut away. FIG. 7 is a cross-sectional view showing a state where a conventional cover is engaged with a housing. DESCRIPTION OF SYMBOLS 1, 1a Cover 2 Cover main body 3 Lock plate 4 Shielding board 5 Knob plate 6 Engaging part 7 Metal plate 7a Contact spring 8 Horizontal part 9 Locking piece 10 Inclined pressing piece 11 Locking dowel 12 Intersection 13 Support plate 14, 15 Slit 17 Housing 18 Contact pin 19 Printed board 20 Shield plate 25 Engagement plate 27 Engagement hole

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nobuo Ishimine 4-159-9 Nakano, Nakano-ku, Tokyo Sanwa Electric Industry Co., Ltd. (72) Keiichi Yasuda 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Toshinori Mori 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-5-95196 (JP, A) 194271 (JP, U) Fully open 58-36581 (JP, U) Fully open 63-141576 (JP, U) Fully open 63-55583 (JP, U) Fully open 4-66782 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/52

Claims (1)

(57) [Claims 1] A plurality of contact pins are held on a bottom wall,
A cover for integrally providing an engagement plate having an engagement hole in a front wall and for shielding a connector engagement recess of a housing fixed between a printed board and a shield plate, wherein the cover body and the shield plate are elastically connected to each other. On the front and back surfaces of the shielding substrate having a metal plate having a contact spring in contact with the back side, a grip plate portion and an engaging portion with respect to the housing are formed so as to protrude symmetrically, and a horizontal portion and a horizontal portion of the cover body are formed. A locking plate having a substantially half-crank side surface is integrally formed with a locking piece projecting symmetrically from a front end and a rear end and having a locking dowel on the front surface and an inclined pressing piece, and the locking plate is provided with the knob. The plate and the engaging portion are separated by a slit, and the fulcrum portion is erected on the substrate so as to swing in the front-rear direction with the intersection portion between the horizontal portion and the locking piece as a fulcrum. It is characterized by being connected to the part Housing cover for shielded connector.