JPH07254454A - Shield type electric connector - Google Patents

Abstract

PURPOSE: To provide eletric connection between connectors, and to provide a highly reliable shield type electric connector of an electric shield by positioning a terminal support block by closing a rear shell. CONSTITUTION: A front part of a support block 41 for retaining a terminal receives a front shell 6. Rear shells 12 and 14 are constituted so that a pivotal hook 72 at its front end is brought into engagement with a slot 50 of the shell 6. The rear shell 12 is formed with a front pressing arm 15 pressing a rear part of the terminal support block 41 at the time of closing, and a rear pressing arm 16 is formed to forwardly press and energize a vertical slot 23 of the rear shell 14 to be engaged therewith. The rear shell 14 is forwardly pressed to surely establish electric connection to the front shell 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector, and more particularly to a shielded electrical connector having a shielding shell for reliable electrical connection.

[0002]

2. Description of the Related Art A shield type electrical connector disclosed in U.S. Pat. No. 5,158,481 includes a terminal support block and a terminal supported by the terminal support block and connected to a wire. The shield is
It includes a mating end on the front shell surrounding the mating end of the terminal support block and a conductive rear shell surrounding the terminal supporting block.

The rear shell and front shell are assembled by hooks that pass through slots in the front shell. A compression beam near the hook pressed against the front shell provides an electrical connection between the front and rear shells.

For example, a terminal support block, a housing,
And parts such as the front shell are separate parts manufactured with varying dimensions within dimensional tolerances. These tolerances provide a snug fit when the components are assembled in an electrical connector. As the parts are assembled, these tolerances accumulate and the parts move relative to their position within the assembled connector. This movement of parts is detrimental, especially when the electrical connectors mate with each other. These movements that occur during the mating connection tend to move the terminal support block rearward from the mating ends of both the housing and the front shell. The terminal supported by the terminal support block moves backward together with the terminal support block during the mating connection. Moving the terminals to the rear is not preferable during mating connection. The reason is that a poor connection is likely to occur with another electrical connector to be fitted. Moreover, during the mating connection, the terminal removes non-conductive oxides and other contaminants which, by favorable wiping, cause undesired voltage drops when electricity passes through the surface of the terminal. Wiping of terminals occurs when the terminals of the electrical connector are in sliding contact with the terminals of the other electrical connector when the electrical connectors are fitted and connected. Sliding contact amount (strok
e) is reduced. Therefore, terminal wiping is reduced by the rearward movement associated with component movement. Also, after assembly of the electrical connector, there is a fear that the electrical connection between the front shell and the rear shell will be incomplete due to the accumulated tolerance.

[0005]

SUMMARY OF THE INVENTION According to a feature of the invention, one of the rear shells is provided with another structure to ensure electrical continuity between the shielding components and provide an effective electrical shield. The partial shell is pressed to urge the rear shell forward to engage the front shell to ensure electrical continuity between the components.

According to another feature of the invention, the components of the electrical connector are assembled in such a way that the components do not move when the electrical connector is matingly connected to the mating electrical connector.

According to yet another feature of the present invention, one of the rear shells presses the terminal block to urge it forward so that the mating end of the terminal block is precisely aligned with the mating end of the front shell. Positioned.

As described above, the shield-type electrical connector of the present invention includes a terminal support block that supports terminals, a conductive front shell that receives at least a front portion of the terminal support block, and one end of the front shell. A conductive rear shell that is rotatably attached to the terminal support block and is fixed to each other by closing the terminal support block so as to surround the terminal support block from both sides, at least one of the rear shells is When the rear shell is closed, a pressing arm that engages with the rear portion of the terminal support block and presses and urges the terminal support block forward is provided.

Further, the shield type electrical connector of the present invention has a terminal block for supporting terminals, a conductive front shell for receiving at least a front portion of the terminal support block, and one end pivotable to the front shell. A conductive rear shell that is movably mounted and that is closed and fixed to each other so as to surround the terminal support block from both sides, wherein the rear shell has a rear shell when the rear shell is closed. Engaging means for cam-engaging each other and biasing one of the rear shells forward to ensure contact with the front shell are provided.

The shielded electrical connector of the present invention further comprises a terminal support block for supporting the terminal, a conductive front shell for receiving at least the front portion of the terminal support block, and one end of which is connected to the front shell. A shielded electrical connector comprising a conductive rear shell that is movably mounted and is closed and fixed to each other so as to surround the terminal support block from both sides, wherein the rear shell includes:
While engaging means for cam-engaging each other when the rear shells are closed to urge one of the rear shells forward to positively contact the front shell,
At least one of the rear shells is provided with a pressing arm that engages with the rear portion of the terminal support block and presses the terminal support block forward when the rear shell is closed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, a shield type plug connector 19 is a shielded multiple wire cable.
It has an insulated cable connection 20 for connecting the insulated wire 21 of FIG. 22 (FIG. 2) and an insulated plug connector area 24 projecting forward for mating with a shield type receptacle connector (not shown). Plug connector area 24
Is a wire connection portion 55 (FIG. 3) for connecting with the insulated wire 21.
And a terminal support block 41 projecting forward, which supports a number of terminals 51 with FIG. 4).

The electrically conductive electrical shield is made by integrally drawing a metal front shell 6 and an upper metal rear shell 12
And the lower metal rear shell 14 provides.
The front shell 6 forms a cavity surrounded by a top wall 46, a bottom wall 48 and side walls 40 that are angled to each other. Laterally extending slots 50 are provided in the upper wall 46 and the lower wall 48 proximate the rear wall forming the strip-shaped support member 118. The support member 118 bridges across the rear of the slot 50.

The rear shell 12 has a structure integrally formed by punching from a sheet metal. The rear shell 12 has an upper wall 52
And a depending sidewall 54 forming a downwardly facing reverse groove.
In the rear portion of the rear shell 12, a portion projecting from the rear wall 58 is an engaging member 56 that engages with the lower rear shell 14. The engagement member 56 has a top wall 60 and a depending side wall 62 forming a reverse groove. The recess 64 is formed as a deep recess in the upper wall 60. The plate portion 66 is displaced from the surface of the upper wall 52 and extends forward. A pair of tabs 68 extending forward from the front end of the plate portion 66.
Protrudes. A curved pivot hook 72 projects from the front end 70 between the tabs 68.

The rear shell 14 is integrally stamped and formed from sheet metal. The rear shell 14 has a lower wall 74 and upwardly raised side walls 76, 78 that form a groove. A laterally outwardly bent flange 114 is at the front end of the side walls 76,78. The plate portion 82 is displaced from the surface of the lower wall 74 and extends forward.
The portion projecting from the rear edge 84 of the rear shell 14 is a strain relief member 86. The strain relief member 86 includes a lower wall 88 and an upwardly rising engagement flange 90 having a tapered portion 92 at the tip. The tab 68 and the pivot hook 72 project forward from the front edge 94. This configuration is similar to that described above for the rear shell 12. Details of the rear shells 12, 14 are described in US Pat. No. 5,158,481. The laterally projecting flange 114 of the rear shell 14 engages behind the laterally projecting flange 42 at the rear of the drawn front shell 6. Details of the front shell 6 and plug connector 19 are disclosed in U.S. patent application Ser. No. 955,554, filed October 1, 1992 (15319). Referring to FIG. 3, the rear shell 14 is mounted by hooking it on the front shell 6 and pivoted toward the rear shell 14 to cover the plug connector 19. The engagement flange 90 is bent inward to wrap around the engagement member 56 and the wire cable 22 (FIG. 2), providing strain relief to the wire cable 22 and joining the rear shells 12 and 14.

Referring to FIGS. 1, 3 and 4, a rearwardly projecting bumper 43 bridges laterally and extends across the rear end of the terminal support block 41. The bumper 43 can be manufactured integrally with the terminal support block 41 by using a dielectric material, for example. The bumper 43 extends laterally in the opposite direction outward from the insulated wire 21 extending beyond the bumper 43.
The bumper 43 has a tapered rear edge that intersects the central axis of the terminal support block 41 of the plug connector 19.

The rear shell 12 has a pair of front pressing arms (pressing arms) 15 on the front edge of the side wall 54. For example, the front push arms 15 are manufactured with a recessed leading edge to reinforce them. The front pressing arm 15 has a rear facing bumper 43.
Engages with the edge of a tapered, bumper 43 that laterally overhangs the insulated wire 21 and biases the plug connector 19 forward with respect to the rear shell 12 and the front shell 6. The pressing force is applied axially through the center of the plug connector 19. Rear shell by hand around pivot hook 72
A large mechanical effect can be obtained by rotating 12. The reason is that the length of the rear shell 12 up to the pivot hook 72 is many times the short distance between the front pressing arm 15 and the pivot hook 72. Biasing the plug connector 19 forward compensates for accumulated tolerance variations separating the assembled parts. This tolerance tends to displace the plug connector 19 from its preferred position relative to the mating front end of the front shell 6. Further, the front pressing arm 15 against the bumper 43 resists the insertion force generated when the mating connector (not shown) and the plug connector 19 are fitted together.

A pair of rear push arms 16 extend laterally outward from the side walls 54. The rear push arm 16 forms a forward-facing sheared front edge 17 formed by denting the side wall 54 and stamping the side wall 54 outwardly, relative to the rearward facing edge 18 of the rear shell 14. Engage. Edge 18 is the rear shell
When the 12 is rotated towards the rear shell 14, the rear pressure arm 16
Is formed at the edge of a vertical slot 23 having an open end for receiving. With reference to FIGS. 3 and 4, when the rear shell 12 is rotated, the rear pressing arm 16 enters the vertical slot 23 and abuts the edge 18 and biases the rear shell 14 forward so that the flange
114 is biased forward to abut the rear portion of the flange 42.
The rear pressing arm 16 and the vertical slot 23 constitute an engaging means for urging one of the rear shells forward. The forward biasing of the rear shell 14 compensates for accumulated tolerance variations that tend to space the flange 114 of the rear shell 14 from the flange 42 of the front shell 6. The front shell 6 and the rear shells 14, 12 engage to ensure the electrical continuity required for effective electrical shielding. Further, the rear pressing arm 16 against the edge 18 opposes the insertion force generated by the fitting of the mating connector (not shown) and the plug connector 19. Following the assembly of the rear shells 12, 14, the engagement flange 90 encloses the engagement member 56 and enters the recess 64 to allow the rear shells 12, 14.
The wire cables 22 are clamped together and the wire cables 22 are gripped to impart strain relief to the wire cables 22.

Referring to FIG. 5, each of the terminal support block 41 and the insulating housing 61 is a separate member, and the insulating housing 61 is formed to be received and covered by the front shell 6. The insulating housing 61 has a rearward facing cavity 71 (FIG. 6) for receiving the front end of the terminal support block 41. Terminal 51 is terminal support block 41
It projects forward from the front end of and is supported by the tongue portion 75 of the insulating housing 61. An elastic gripping finger 44 formed integrally with the front portion of the terminal support block 41 is locked in an undercut recess 63 (one shown) of the insulating housing 61 to insulate the terminal support block 41. Prevents separation of the housing 61.

Referring to FIG. 6, the elastic fingers of the front shell 6 (one shown at 65) extend obliquely toward the front mating end 67 of the front shell 6 and undercut the insulating housing 61. Insulative housing 61 engaged with the recess (one is shown at 69)
The front shell 6 is prevented from coming off. The mating end 73 of the insulating housing 61 is surrounded by the front mating end 67 of the front shell 6.

The front shell 6, the terminal support block 41, and the insulating housing 61 are manufactured with dimensions within the allowable dimensional tolerance. These tolerances allow the parts to fit together when assembled or mated within the connector. These tolerances may accumulate as the parts are mated and shift relative to each other within the assembled connector. For example, referring to FIG. 6, this tolerance allows elastic finger 65 to move back and forth within recess 63. This tolerance allows the elastic finger 65 to move back and forth within the recess 69. As described above, the front shell 6, the insulating housing 61, and the terminal support block 41 are components that are not preferable relative to each other in the assembled plug connector 19 and easily move in position.

This misalignment of parts is particularly harmful when the plug connector 19 is fitted with another mating connector (not shown). Such misalignment facilitates moving the terminal support block 41 rearward during fitting with respect to the fitting end 73 of the insulating housing 61 and the front fitting end 67 of the front shell 6. When mating,
The terminal 51 supported by the terminal support block 41 moves rearward together with the terminal support block 41. It is not desirable for the terminals 51 to move rearward when mating. This is because the terminal 51 is not shown because it moves rearward. This is because there is a fear that it will not be connected to another connector on the other side. In addition, the terminals 51 provide a favorable terminal wiping to remove non-conductive oxides and other contaminants which, during mating, result in an undesirable drop in voltage across the surface of the terminals 51. Wiping of the terminals is obtained by the terminals 51 slidingly contacting the terminals of another mating connector during fitting.
When the terminal 51 moves rearward, this sliding contact amount (stroke) decreases. Therefore, when the terminal 51 is displaced rearward due to the movement of the parts, the sliding contact amount of the terminal 51 decreases. According to a feature of the present invention, the parts of the plug connector 19 are assembled in such a way that the parts do not move while the plug connector 19 is mated with the mating connector (not shown).

The preferred embodiment of the shielded electrical connector of the present invention has been described above in detail, but it goes without saying that the invention is not limited to the above embodiment and various modifications and changes can be made. The shape of the front end edge 17 of the rear pressing arm 16 is tapered as apparent from FIG. This pushes the rear shell 14 forward when engaged with the edge 18 of the vertical slot 23, but the taper does not necessarily have to be provided on the rear pushing arm 16. For example, vertical slot 23
The end edge 18 may be tapered (inclined) so that the open end side of the vertical slot 23 becomes wider. Also, the rear pressing arm 16
The part that abuts against the edge 18 does not have to be the edge 18.
It may be a cut and raised piece that is cut and raised from 6, 78 and bent inward.

Further, the front shell 6 and the rear shell are constructed so that the flanges 42 and 114 contact each other.
The shell 6 may be formed with a projection tapered toward the side walls 76 and 78 in the fitting direction, and the projection and the side walls 76 and 78 may be in contact with each other.

Further, although the terminal support block 41 and the insulating housing 61 have separate structures, they may be an integrated insulating housing, that is, the terminal support block.

The front shell 6 and the rear shells 12 and 14 may be made of a conductive material, and plate-like copper, iron, stainless steel, or the like is used.

[0027]

According to the shield type electrical connector of the present invention, at least one of the rear shells is provided with a pressing arm that engages with the rear portion of the terminal supporting block when it is closed and presses the terminal supporting block forward. Therefore, it has the following effects.

That is, the terminal supported by the terminal support block is reliably positioned at a predetermined position regardless of the position variation due to the manufacturing tolerance of parts. Furthermore, since the terminal support block is supported so as not to move rearward when it is fitted to the mating connector, wiping is sufficiently performed and the electrical connection is highly reliable.

Further, in the rear shell 12 of the shielded electrical connector of the present invention, the rear shells are cam-engaged with each other to urge one of the rear shells forward to positively contact the shell. Since the combination means is provided, the following effects can be obtained.

That is, the electric connection between the front shell and the rear shell is surely made, so that the electric shield is surely obtained.

Further, since the shield type electric connector of the present invention has the above-mentioned pressing arm and the engaging means, the electric connection between the connectors can be ensured and the electric shield can be surely performed. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a disassembled component of a shielded electrical connector of the present invention.

FIG. 2 is a perspective view of the shielded electrical connector shown in FIG.

FIG. 3 is a vertical cross-sectional view of the shielded electrical connector shown in FIG. 1 with parts partially assembled.

FIG. 4 is a vertical cross-sectional view of a shielded electrical connector similar to that of FIG. 3, with the components combined together.

5 is a perspective view of a terminal support block and an insulating housing of the shielded electrical connector shown in FIG.

6 is a partial cross-sectional view of the shielded electrical connector shown in FIG.

[Explanation of symbols]

 6 Front shell 12, 14 Rear shell 15 Push arm 16, 23 Engaging means 41 Terminal support block 51 Terminal

Claims (3)

[Claims] 1. A terminal support block for supporting a terminal, a conductive front shell for receiving at least a front portion of the terminal support block, one end rotatably attached to the front shell and the terminal support. A shield-type electrical connector comprising a conductive rear shell that is closed and fixed to each other so as to surround the block from both sides, wherein at least one of the rear shells has at least one of the terminal support blocks when the rear shell is closed. A shield-type electrical connector comprising a pressing arm that engages with a rear part and presses and biases the terminal support block forward. 2. A terminal block that supports terminals, a conductive front shell that receives at least a front portion of the terminal support block, one end rotatably attached to the front shell, and the terminal support block. A conductive rear shell that is closed to surround each other and fixed to each other, wherein the rear shell is cam-engaged with each other when the rear shells are closed. 2. A shielded electrical connector, characterized in that an engaging means is provided for biasing one of the above parts forward so as to surely contact the front shell. 3. A terminal support block for supporting a terminal, a conductive front shell for receiving at least a front portion of the terminal support block, one end rotatably attached to the front shell and the terminal support. A shield-type electrical connector comprising a conductive rear shell that is closed and fixed to each other so as to surround a block from both sides, wherein the rear shell is cam-engaged with each other when the rear shells are closed. Engaging means for urging one of the shells forward to positively contact the front shell is provided, and at least one of the rear shells is provided with the terminal support block of the terminal support block when the rear shell is closed. A shield-type electrical connector comprising a pressing arm that engages with a rear part and presses and urges the terminal support block forward.