JP2928267B2 - Shielded electrical connector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION (Industrial Application Field) The present invention has a main body having a substantially rectangular cross section, in which a plug portion having a circular cross section has a socket with a circular cross section provided with an external shield. The invention relates to a metal shield for a surface mounted electrical connector, comprising means for protruding forward and hooking, so as to mate with.

BACKGROUND OF THE INVENTION U.S. Pat. No. 4,637,669 discloses a shielding means for a connector in which such surface mounting is performed. The connector on which the surface mount is performed is generally known as a “microminiature DIN type connector”, and the shield means includes a first shield surrounding the top and sides of the body of the surface mount connector; With another internal shield, which is of circular cross section and has a bosh-shaped mouth,
The socket is provided for receiving the socket provided with the shield on the outside. Also, U.S. Pat.No. 4,493,525 discloses a shield for a surface mount connector of the type described herein, the shield comprising a front plate which is secured to the body of the surface mount connector. And has a central circular opening for the socket to enter and exit, from the periphery of which a series of spring-like fingers protrude, which make electrical contact with the shield of the socket. It has become for. If the surface mount connector needed to be further shielded, additional shielding would be required.

U.S. Pat. No. 4,493,525 also discloses a first circular cross section.
A first electrical connector having a fitting portion and a second electrical connector having a second fitting portion having a circular section with a shield are disclosed, wherein the second fitting portion is configured to move the first fitting portion in a fitting direction. And the second fitting portion has a flexible hooking arm on itself, and the hooking arm is A protrusion is provided near the end, wherein the first electrical connector has a gimmick shoulder provided in its insulative housing, on which the lug can be hooked, whereby the first electrical connector can be hooked. And the 2nd fitting part can be held in the fitting state. According to U.S. Patent No. 4,493,525,
The first fitting portion is surrounded by a ring of a plurality of spring-like fingers, the fingers protruding from a front shield of the first connector, and the fingers are configured such that the second fitting portion has the first fitting shape. When fitted to the portion, it is for elastically engaging with the shield of the second fitting portion. U.S. Pat.No. 4,548,455 discloses such a hook arm so that when the plurality of connectors are mated with each other, the protrusion is fixed in its hooked position against the hook shoulder. Discloses means for indicating that the arm can be actuated to release the arm, so that the protrusion can be pushed by the hook shoulder, thereby Multiple connectors may be allowed to be separated from each other.

SUMMARY OF THE INVENTION The present invention is an integral shield for a small circular DIN connector or the like that can be easily assembled to the connector and has at least four of the connector housings. The connector may be shielded on substantially the entire surface and make electrical contact with the shield of the socket when the socket provided with the external shield is mated with the surface mount connector. It is intended to provide a shield that can. Furthermore, the integral shield also has a hooking function for hooking and securing a complementary connector to be fitted.

(Means for Solving the Problems) The present invention integrally has a plug portion having a substantially circular cross section,
A shielded electrical connector comprising: an insulating housing having a substantially rectangular cross section surrounding the plug portion in a state of being separated from the plug portion; and a metal shield surrounding the housing, wherein the shield is provided on the housing. An upper wall covering the entire upper wall, a pair of side walls adjacent to the upper wall and covering the entire opposing side wall of the housing, and the plug portion adjacent to the upper wall and the pair of side walls of the shield; A front wall having a substantially circular through-opening for receiving a socket of a mating partner, and a plurality of cantilever fingers spaced apart from each other around the through-opening and projecting inward from the through-opening. Wherein one of the cantilever fingers is a hook finger for hooking the projection of the socket.

According to the present invention, the shield has a rectangular box-shaped structure, the box-shaped structure including an upper wall surrounding substantially the entire side wall of the upper wall of the housing, and a pair of side walls. Are adjacent to the upper wall so as to surround substantially the entire side wall of the housing, and the box-shaped structure includes a front wall adjacent to the upper wall and the side wall. The front wall has a circular through hole therein for receiving the externally shielded socket. A series of resilient cantilevered fingers are spaced from one another around the circular mouth and project from the edge of the mouth into the interior of the shield and engage the outer shield of the socket. I have. The shield has means, for example, a flange, which resiliently engages in a groove in the body of the surface mounted connector to secure the shield to the surface mounted connector. The means also comprise, for example, mounting feet, which project from the side walls and from the front wall and, when the surface-mounting connector is to be mounted on a substrate, the mounting legs are mounted on the substrate. It is adapted to be received in a middle opening.

The resilient cantilevered fingers preferably have a radially inwardly displaced or recessed portion near their free end and at their free end. Protrudes from the finger in a direction radially inward of the circular opening in the front wall to limit deflection of the finger by the socket when the socket shield is engaged by the finger. And therefore limit excessive stress on the finger. A catch finger is provided which is significantly shorter than the resilient finger, and when the surface mount connector and the complementary connector mate with each other, the protrusion of the complementary connector is hooked after the finger. The hook finger can be provided very easily by forming a spring finger on the front wall, then cutting one of the spring fingers and providing the hook finger. is there.

The means for securing the shield to the body may comprise a pair of lobes, each lobe depending at a location remote from the front wall from each lateral edge of the top wall, and Each lug terminates in a flange for engaging in a groove in the body of the surface mount connector. Another flange may be bent inward from the side wall,
Thereby, the other flange is positioned in parallel contact with the first-mentioned flange and in the groove,
The first described flange may be engaged so that the shield can be more securely fastened to the body.

In addition to or in place of the flange, the fastening means may comprise a pair of resilient pawls, each pawl being oblique from one of the plurality of side walls of the shield. Projecting and projecting in the general direction of the other side wall of the shield and resiliently fit into a notch in a lateral wall of the body.

The shield may be secured to the substrate by mounting feet, the mounting feet protruding from sidewalls of the shield and being formed as claws, the claws being curved outwardly of the shield and having openings in the base layer. To be elastically engaged with the edge of the

However, each mounting leg may be bifurcated and comprise two portions, each of which terminates in a barb, the barb being connected to the surface mount connector by a shield over the base layer. When mounted above, it engages the underside of the substrate.

The invention also includes the shield when combined with one another, and the surface mount connector.

Preferably, the groove for receiving the flange is formed in a plurality of opposing side walls of the body, and the groove may extend from the end to the rear end of the side wall; Further, the groove is located near the rear end,
Become deeper, in which case the flange engages with a resilient bite force into the deeper portion of the groove when the shield is fully assembled to the surface mount connector. .

Examples Hereinafter, examples of the present invention will be illustratively described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a shielded connector for mounting on a substrate, for example a printed circuit board, comprises a one-piece metal shield 12 and a one-piece, substantially square cross-section. And an insulated connector main body 14 formed. Protruding forward from the connector body 14 is a plug portion 16 having a circular cross section. The plug portion 16 is for fitting with an externally shielded electric socket 18 having a circular cross section (FIG. 1A). The electric socket 18 has a metal shield 19, into which a plurality of electric pins 17 protrude.

As best seen in FIG. 11, the connector body
14 has a central part 22 from which the plug part 16 projects.

The shield 12 includes an upper wall 24 and a pair of side walls 26, each side wall 26 depending from a plurality of edges adjacent to the upper wall 24 and facing each other. The upper wall 24
And a front wall 28 adjacent to the plurality of side walls 26 is formed integrally with the upper wall 24 and the side walls 26, and the socket
It has a circular through-opening 30 therein for receiving 18. The opening 30 has a circular edge 32 from which a series of resilient cantilevered fingers 34 on the shield 12 project behind the edge 32, and
Numeral 34 is for engaging the outer shield 19 of the socket 18 and the fingers 34 are regularly spaced from each other around the edge 32. Multiple fingers 34
Is formed from the portion of the surface 28 that would otherwise surround the opening 30. As shown in FIGS. 4, 6 and 7, each finger 34 has a recess 36 formed therein, which is close to the free end 38 of the finger 34. , In a spaced position retracted from its free end 38,
The depression 36 also projects inwardly on the radius of the opening 30 so that when the socket portion 18 is fitted into the plug portion 16, the finger 34 is freed by the socket portion 18. Of the socket portion 18 so that the shield 19 of the socket portion 18 does not overload the finger 34 by engaging with the recess 36.

According to the variant shown in FIGS. 8 and 9, in this example the finger is referred to by the reference numeral 34 ', the depression is referred to by the reference numeral 36', and the depression 36 'is Three
It is formed at the end of 4 '.

According to the variant shown in FIG. 5, the finger referred to by the reference numeral 34 "is formed with a joggle 40, which is the free end of the finger 34". 38 "to the retracted position, thereby forming a raised shoulder 42 for engaging said shield 19.

The shield 12 of the first electrical connector 10 is provided with flanges 48 and 50 folded inward and a plurality of claws 52 for fastening the shield 12 to the main body 14. The plurality of side walls
From 26, a mounting leg (foot) 54 hangs down, and from the extension 55 of the front wall 28, a mounting leg 58 hangs down.
Is for securing the shield 12, and hence the body 14, to the base layer. The plug portion 16 is formed with a plurality of parallel cavities 62 for receiving terminals, and the cavity 62 fits the plug portion 16 and
The central portion 22 of the body 14 also penetrates, and
22 open into the terminal receiving surface 70. The central part 22
Has a hood 68 projecting forwardly thereof, which hood 68 surrounds the plug portion 16 at a distance from the plug portion 16 and thereby the socket 18
Can be fitted to the plug portion 16. The plug part 16 has an axial key passage 61 for slidably receiving a complementary key 65 in the socket 18. Each cavity 62 has an electrical receptacle 196 secured therein, for receiving each one of the plurality of pins 17 of the socket 18. The body 14 has a bottom mounting surface 73, which has a plurality of spacing ears 79 for mounting on the substrate.

As shown in FIGS. 11 and 17, the shield
To the inside rear of the 12 front wall 28, a short hook finger 180 projects, and this hook finger 180 is connected to the front wall 28 by a smooth arch portion 181.
A camming surface 183 is formed, which is curved substantially forward of the shield 12. The finger 180
Protrudes slightly obliquely towards the plug portion 16 and is considerably shorter than the finger 34, is located between two of the fingers 34 and is evenly spaced from the finger 34 . The finger 180 is a square in section and has a flat surface 182 facing the plug portion 16 and terminates in a flat free end 184, which free end 184 is It is orthogonal to the surface 182. The finger
180 is located radially opposite the finger 34 at the bottom of the front wall 28, as shown in FIG. 17, and the finger 34 at the bottom of the front wall 28 is therefore Mounting surface 73
Is approaching. The shield 12 is formed by first forming a plurality of fingers 34 from a part of the surface 28, and a part of the surface 28 only surrounding the opening 30 if the finger 34 is absent. Then, the upper finger 34 is cut at a position where the upper finger 34 is retracted from the jog 40 to form the hook finger 180.

The second connector 20 comprises an insulating body 186, as seen in FIGS. 16 and 17, in which the shield 19 protrudes from the socket 18 and the body 186 receives the electrical cable C. The individual lead wires (not shown) of the electric cable C are connected to respective connection portions (not shown) of the pins 17. From the main body 186 to the socket 1
8, a cantilever-shaped hooking arm 188, which can be elastically bent, protrudes, and this hooking arm 188 has a protrusion 90 on itself near its free end, 90 is
It protrudes through the opening 91 in the shield 19, so that the projection 90 stands up above the hooking arm 188. The protrusion 90 is provided in the first rearwardly facing socket 18.
It has an arcuate surface 92 and a second arcuate surface 94 facing the front of the socket 18, wherein the surfaces 92 and 94 are provided with the projections.
It connects to 90 flat tops 96. Slidably mounted below the arm 188 is a rigid and resilient support lever 99, which is
Is connected to a slide (not shown) urged by a spring (not shown) in the main body 186,
Is connected to a sleeve 101 slidably mounted on the body 186. The sliding body, i.e., the support lever 99 is normally attached to the arm by the biasing spring.
The sleep 101 is biased toward the extended support position below 188 and can be retracted by pulling the sleep 101 rearward of the body 186, thereby allowing the arm 188 to retract.
No. 4,548,455, incorporated herein by reference.
The socket 18 is allowed to flex freely inwards and downwards, as disclosed in detail in US Pat.

In order to mate with each of the first and second connectors 10 and 20, the socket 18 is mounted on the shield 12
The key 67 is inserted into the circular opening 30 in the
In the mating direction indicated by the arrow A in FIG. 17, the key 17 is engaged in the key passage 61, so that each pin 17 enters each cavity 62 and enters into each receptacle 196 in the cavity 62. Engaged. The slide, and hence the sleeve 101, is in the extended position prior to the mating operation, so the support bar 99 projects below the arm 188. Because the arms 188 are somewhat flexible, the socket 18 is allowed to extend into engagement with the plug portion 16. This is because the surface 94 of the projection 90 is the surface 94 of the cam of the short finger 180.
By being engaged with 83, the support bar 99 is pushed in against the elastic action of the support bar 99, at which time the finger 180 is moved from its oblique position shown in FIGS.
Because it is raised above the 90 flat tops. The protrusion 90
When the finger passes through the free end 184 of the finger 180, the protrusion 90
Returns to its original position and is hooked there, as shown in FIG. Therefore, the connectors 10 and 20
Are firmly held together. Because
Because the 188 is supported by the support bar 99, it cannot be pushed by the finger 180 by simply pulling the table C. When the connectors 10 and 20 are to be separated from each other, the sleeve 101 is pulled back, thereby attaching the support bar 99 to the arm 188.
Down or pull the arm 188 to flex freely into the socket 18. Therefore, the connector 20
By pulling on the sleeve 101, the connector 1
When separated from zero, the projections 90 are brought to their surface 92
The top 96 of the protrusion 90 slides on the surface 182 of the finger 180 until the abutment protrusion 90 passes through its surface 92 while being guided by. The connector 10
And 20 cannot be separated from each other by pulling on the cable C. Because the sleeve 101 cannot be retracted by it.

At the rear end of the upper wall 24, that is, at the end remote from the front wall 28, a plurality of projecting pieces 44 hang down from a plurality of opposing lateral edges 46 of the upper wall 24,
Each lug 44 ends with a flange 48 and these flanges 48
Project toward each other, that is, toward the inside of the shield 12. Immediately below each flange 48 (FIGS. 2 and 13;
In each of the side walls 26, a further inwardly folded flange 50 is formed, which extends parallel to the flange 48 above it, And it is continuous with this flange 48. Below the flange 50, each side wall 26 has a claw 52 punched out of the side wall 26, which is in the form of a resilient tongue, near the rear end of the shield 12, near the rear end. It protrudes obliquely into the inside of the shield 12.

Said shield 12 is further provided with means for fixing it to said base layer S, said means comprising a plurality of mounting legs 54 (FIGS. 1, 11, 13 and 15), 54 '(FIG. 2). Or 5
4 "(FIG. 3), depending from each side 26. The mounting feet 54 are in the form of simple projections, and the mounting feet 54 'are a plurality of pawls. In the form, these claws are curved in opposite directions towards the outside of the shield 12 and the mounting feet 54 "are bifurcated and therefore consist of two parts, The portions terminate in inverted barbs 56 and the portions are allowed to be resiliently deflected toward one another. The front wall 28 is further provided with another mounting leg 58 which depends from an extension 60 behind the front wall 28 and extends parallel to the upper wall 24, or As shown in FIG. 10, an extension 60 'of the front surface 28 projects obliquely downward from the front wall 28. The extensions 60, 60 'can also be said to constitute a short bottom wall of the shield 12.

The plug portion 16 is formed with a plurality of mutually parallel cavities 62 for receiving terminals, the cavities 62 being the plug portions.
Penetrate the plug portion 16 along the axial direction of 16 and each cavity
62 has a bosh-shaped mouth 64 for receiving a pin, and this mouth 64
Opens into the mating surface 66 of the body of the plug portion 16.
The central portion 22 has a forwardly projecting hood 68 which surrounds the plug portion 16 spaced from the plug portion 16 such that the socket 18 mates with the plug portion 16. To be combined.
The part 22 of the housing 14 has a terminal receiving surface 70 facing the fitting surface 66, and each cavity 62 penetrates the part 22,
And the terminal receiving port 72 is provided on the surface 70.
Open to the inside.

The plug portion 16 is provided with a complementary key 65 of the socket 18.
Axial keyways 61 and for receiving
Has 63.

A terminal leg separation plate 74 extends along the lower edge of the surface 70 in a direction away from the plug portion 16;
The plate 74 is formed with a plurality of spacing notches 76 for receiving terminal legs, the notches 76 being elongated in the axial direction of the cavity 62, and each notch 76 extending in a direction perpendicular to the surface 70. Thus, opening into the rear edge 78 of the spacing plate 74 remote from the surface 70, and each notch 76 is shaped to receive two terminal legs therein, thereby It corresponds to two rows of terminal leg receiving openings in the area where the connector is to be fitted.

The plurality of notches 76 in the separating plate 74 are
Is set. The V-shaped groove 77 in the side wall 75 is
13 and 13A, the protrusions 110 are sharpened to a desired shape, as shown in FIG. 13 or 13A, to sharpen the side wall 75 upon insertion and prevent the leg 100 from being pulled out of the notch 76. I do. The protrusion 110 not only secures the leg 100 in the notch 76 but also prevents the leg 100 from moving in a direction perpendicular to the separating plate 74.

A protective skirt 80 projects from the surface 70 of the section 22 and projects rearward from the periphery of the section 22 and connects to each end of the spacing plate 74. The hood 68,
The portion 22, and the skirt 80 are formed on each side wall 81 of the body 14, and a common external groove 82 is provided in the hood 68.
Opening into the front edge of the skirt 80 and the rear edge of the skirt 80, each groove 82 having a bosh flange receiving opening 84 opening into the front edge of the skirt 68;
And a depth-increasing portion 86 which opens into the rear edge 78. A recess 88 is formed on each side of the skirt 80 and opens into the rear edge of the skirt 80 below the groove portion 86 to form a shield retaining shoulder 86. The hood 68 has an external engraved recess on each side.
190 is formed, and the recess 190 opens into the front edge of the hood 68. The main body 14 has a bottom mounting surface 192 facing an upper wall 193, and the mounting surface 192 includes:
As shown in FIGS. 11 to 13, a separating member 194 is provided, and the mounting surface 192 is parallel to the plate 74.

Electrical terminals 195 are each received into each cavity 62, and each electrical terminal 195 connects to a front mating portion in the form of a receptacle 196 and a rear end of the receptacle 196. The connected intermediate insertion / holding portion 198 and the terminal leg 10 connected to the rear end of the portion 198 by the arm 102.
The leg 100 extends at right angles to the other part of the terminal 195. The receptacle 196
Is formed in accordance with U.S. Pat.No. 4,776,651 and includes a laterally barbed holding plate 104, and the insertion and holding portion 198 comprising an insertion ridge 106.
No. 775,336, both of which are incorporated herein by reference. The leg 100 is provided with a holding means in the form of a substantially U-shaped holding member 108, which is formed as a holding projection 110 as schematically shown in FIG. Have been. Each leg 100
Has an insertion spear 112 below the holding member 108 and a leg portion 114 between the holding member 108 and said portion 198. Body 14
The rear surface of the terminal 195 is shown in FIGS. 13 and 13A.

To attach the shield 12 to the connector body 14, the terminals 195 are inserted into the cavity 62,
The front end of the receptacle 196 of the terminal 195 approaches the mouth 62, and their legs 100 are held in the notches 76 by the holding member 108, and the shield 12 is moved in the direction of arrow A in FIG. It is slid onto the connector body 14. During this operation, the flanges 48 and 50 enter each groove 82, are guided by their bosh mouths 84, and eventually resiliently penetrate into the depth increasing portion 86 of the groove 84, Claws 52
Also snaps into the recess 88, the edge of which engages the retaining shoulder 89. Thereby, the shield is firmly fixed to the main body 14.

Next, the spear 11 projecting below the mounting surface 73
2 is inserted into each hole H in the base layer S, optionally the mounting feet 54, 54 'or 54 "enter each opening AP in the base layer S, and the mounting feet 58 are In
Enter AP1. The mounting feet 54 and 58 are simply pressed into their respective openings. However, the mounting leg 54 '
It is resiliently pushed into the inside of the shield 12 by the edge of the opening AP, is received by the recess 190, and finally returns to its original position to engage the lower surface of the base layer S. Two parts of each mounting leg 54 "
Are compressed toward each other and eventually return to their original positions, so that the barbs 56 engage the lower surface of the substrate S.

Preferably, the ear 110 of each retaining member 108 has a cutting wing protruding from the ear 110 and having a sharpened edge, and the wing is for cutting into the wall of the notch 76. ear
The 110 is preferably inferiorly shaped, as shown in FIG. 13 or 13A, and the ear 110 is
It is complementary to and is received in the inner groove 77.

According to the shielded electrical connector of the present invention, a single shield having an upper wall, a pair of side walls, a front wall, and a plurality of cantilever fingers allows at least a minimum number of parts of the housing. Shields can be provided on almost all of the four sides, reliable electrical contact with the shield of the mating socket can be obtained, and furthermore, one of the cantilever fingers can be pulled. The hook finger has an effect that the mating partner can be hooked and fixed without requiring an additional member.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cutaway perspective view of an eight-position electrical connector that is shielded and surface mounted. FIG. 1A is a cutaway perspective view of an electric socket with a shield. FIG. 2 is a partial and schematic exploded perspective view of a modified example of the connector. FIG. 3 is a cutaway perspective view showing a modification of the mounting legs of the connector of FIG. FIG. 4 is a cutaway perspective view of a portion of the metal shield of the connector of FIG. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. FIG. 6 is a cutaway view taken in the direction of arrow 6 in FIG. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 8 and 9 are a longitudinal sectional view and a perspective view, respectively, showing a modification of the portion shown in FIGS. 6 and 7. FIG. 10 is a sectional view similar to that of FIG. 5, but showing a modification of the parts shown therein. FIG. 11 is an actual axial sectional view of the shielded connector of FIG. FIG. 12 is a cutaway front view of the shielded connector of FIG. FIG. 13 is a cutaway rear view of the connector of FIG. 1 having terminals secured in holes in the front row of the board. FIG. 13A is a rear view of the connector of FIG. 2 having terminals secured in holes in the back row of the board. FIG. 14 is a cutaway cross-sectional view of the connector of FIG. FIG. 15 is an axial sectional view of the shield of the connector of FIG. FIG. 16 is a reduced plan view of a shielded second electrical connector for mating with the connector shown in FIG. 17 is a schematic sectional view taken on line 17-17 of FIG. 4, showing the second connector when fitted to the connector shown in FIG. 1; It is. 10 Shielded electrical connector 12 Shield 14 Housing 16 Plug part 18 Socket 24 Top wall 26 Side wall 28 Front wall 30 Through opening 34 Cantilever finger

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor William Curley All 1717 Harrisburg Colonial Road, Pennsylvania United States 2711 (56) References JP-A-1-187784 (JP, A) JP-A 62-66185 , U) Actually open 1987-43476 (JP, U) Actually open 1986-63784 (JP, U) Actually open 1-158675 (JP, U) Actually open 1-170966 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 13/648-13/658 H01R 23/02-23/68

Claims (1)

(57) [Claims] 1. A plug portion having a substantially circular cross section is integrally provided.
A shielded electrical connector comprising: an insulating housing having a substantially rectangular cross section surrounding the plug portion in a state of being separated from the plug portion; and a metal shield surrounding the housing, wherein the shield is provided on the housing. An upper wall covering the entire upper wall, a pair of side walls adjacent to the upper wall and covering the entire opposing side wall of the housing, and the plug portion adjacent to the upper wall and the pair of side walls of the shield; A front wall having a substantially circular through-opening for receiving a socket of a mating partner, and a plurality of cantilever fingers spaced apart from each other around the through-opening and projecting inward from the through-opening. Wherein one of said cantilever fingers is a hook finger for hooking a projection of said socket.