JP2903115B2 - Shielded electrical connector - Google Patents

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
The present invention relates to an electrical connector provided with I (electromagnetic interference) and RF (high frequency) shielding.

[0002]

2. Description of the Prior Art The connector disclosed in U.S. Pat. No. 3,281,756 has electrical contacts connected to signal transmission conductors of a cable and conductive contacts connected to a conductive outer braided wire which provides shielding for EMI and RF interference. Includes a sex shell. The conductive shell is not covered by an insulator or the like and transmits the high voltage induced along the cable shield. Such a high voltage causes an electric shock to the human body holding the conductive shell.

In a connector having two electrical contacts, it is necessary to provide a keying function to orient the contacts when the connector is mated with another complementary connector. Conventionally, the keying function has been achieved by performing key processing integrally with the shell or assembling another key and the shell.

However, there was a need to provide an insulative housing and insulative coupling means that did not require the keying of the shell and were free of electric shock.

[Means for solving the problem]

[0005] The shielded electrical connector of the present invention includes conductive contact means for connecting to a corresponding signal transmission means of an electric cable, a conductive shell, and an insulating member for separating the contact means from the conductive shell. The insulated housing has an integral key and the conductive shell has a keyway. The insulating housing receives the integral key. The conductive shell is manufactured by drawing into a cylindrical shape, and the keyway extends in the longitudinal direction of the cylinder and opens at the front end of the cylinder. That is, the shielded electrical connector of the present invention includes an insulating member for accommodating the contact, a conductive shell disposed along the outer periphery of the insulating member, and an insulating housing disposed along the outer periphery of the conductive shell. A keyway extending longitudinally from one end of each of the insulating member and the conductive shell and terminating at an intermediate position is formed in the insulating member and the conductive shell. A projecting key that engages with the keyway is provided, and when the key is engaged near the end position of the keyway, the fixing direction of the insulating member and the conductive shell is determined and the insulating housing is provided. The insulating member and the conductive shell are prevented from coming off to the one side.

Also, a shielded electrical connector according to the present invention comprises an insulative coupling means and an insulative housing with an integral key molded therein. The coupling means is moved along a portion of the housing, assembled and frictionally engaged in a position pivoting with respect to the housing, and locks in a second position of the housing. The present invention provides a conductive shell placed along the outer periphery of an insulating member for accommodating a contact, an insulating housing for receiving the conductive shell, and an outer side of the insulating housing that is rotated when mated with a mating connector. In a shielded electrical connector having a retained insulating coupling, the insulating housing includes:
A plurality of cantilever structures projecting outwardly and extending in a substantially arcuate manner and engaging the insulative coupling with the cantilever structure when the conductive shell is received in the insulative housing; The conductive shell is placed so as to be substantially in contact with the inner surface of the cantilever to prevent bending of the cantilever structure.

[0007] The shielded electrical connector of the present invention is manufactured by the following steps. Assembling the insulating coupling means and the molded integral insulating housing with key. An electrically conductive shell is assembled within the opening of the housing such that the keyway of the shell receives the key. At least one connected to the insulation means and the conductor of the electrical cable in the opening
The electrical contacts are assembled and the conductive clamp is joined to the conductive shield of the cable. Then, the opening of the housing is closed with the insulating cover.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a shielded electrical connector according to an embodiment of the present invention. First, FIGS. 1 and 2
See The connector 1 is assembled on the electric cable 2. The cable 2 includes elongated conductors 3,3 each surrounded by an insulator 4, a conductive shield 5 such as a braided wire surrounding the insulator 4, and an outer insulating jacket 6 of a polymer material.
Each conductor 3 may be surrounded by an insulator 7.

The connector 1 and its components will be described below. The insulating housing 8 and the insulating coupling means 9, for example a tubular collar, provide an external insulating surface to prevent electric shock due to the voltage transmitted through the shield 5 of the cable 2. FIGS. 3 and 4 show an insulating nut 10, a gasket 11, a conductive clamping element 12, a conductive sleeve element 13, for example, tubular electrical contacts 14, 14 for receiving and connecting each conductor 3 of the cable 2. 2 shows a conductive contact means, an insulating means 15 and a conductive shell 16.

Referring to FIG. 13 to FIG. 15, the nut 10 is a one-piece molded plastic structure.
, An external end cap 18 provided with an external flat 19 for receiving a wrench (not shown), and an external screw 20.

Referring now to FIGS. 5-11, the housing 8 is a one-piece molded plastic construction having a stepped center hole 21, a rear end 22 with internal threads 23 for receiving the screws 20 of the nut 10, And has an axial slit 25 formed spaced apart around a front end 26 in communication with the rearward facing shoulder 24 and hole 21. The slit 25 allows the lip 27 and the front end 26 to flex radially inward. The outer surface of the thickly formed cylindrical lip 27 is tapered in the shape of a truncated cone toward the front end 26. A cylindrical recess 28 is formed on the outer surface just behind the lip 27.
There is. The flat concave portion 29 on the outer surface of the thick cylindrical wall 30 behind the concave portion 28 functions as a tool receiver (not shown) for inserting a wrench tool, and is used for tightening the nut 10 screwed to the housing 8. An inwardly protruding key 31 is formed integrally with the housing 8 at the front end 26, and is suitable for manufacturing with a single straight drawing apparatus (not shown) with a mold core pin (not shown). The key 31 is integral with the lip 27 and protrudes inside the housing 8. The key 31 has a rearwardly facing end 32 projecting into the interior of the housing 8 and is moldable by a single core pin having a first step of reduced diameter forming a shoulder 24. It also has a second step of small dimensions and forms a key 31 integral with the housing 8. After forming the housing 8 around such a core pin, the core pin is easily pulled from the front to the rear of the housing 8. Therefore, the housing 8 is easily pulled out from the front to the rear. Therefore, this structure of the housing 8 is suitable for mass-producing the housing 8 by repeated molding using such a core pin.

Next, a description will be given with reference to FIGS. The coupling means 9 is of a one-piece molded construction, is provided with a series of longitudinal grooves 33 communicating with the front end 34 on the outer cylindrical surface, and has an internally threaded front end 35 and a screwed connection with another complementary connector (not shown). It has a circular lip 36 projecting inward. This lip 36 frictionally engages with lip 27 of housing 8 and is slidable on lip 27 of housing 8. For that,
The lip 27 of the housing 8 flexes radially inward, allowing the coupling means 9 to pass to the second position, where the lip 36 enters and locks the groove 28 to prevent further movement from front to back. I do. When the coupling means 9 is locked in the groove 28, it is rotatable with respect to the housing 8 and can be screwed together with a mating connector (not shown) without rotation.

A gasket (packing) 11 shown in FIG. 16 is made of elastic rubber and has a forwardly facing annular groove 37. The clamp element 12 shown in FIG. 17 is made of metal and has a shaft hole 38 for receiving the cable 2, a rearward projection 39 inserted into the annular groove 37 of the gasket 11, and a frontward cup 40. The sleeve element 13 shown in FIG. 18 is made of metal and has a shaft hole 41 for receiving the cable 2 and a rearward facing cup. This cup 42 is superimposed on the cup 40 of the clamp element 12 as shown in FIG.

The insulating means 15 shown in FIGS. 19 to 21 is, for example, an integrally molded dielectric, and has an outer cylindrical body provided with a concave keyway 43 communicating with a front end 44, and a front end communicating with a rear end 46. Contact insertion cavities 45, 45 extending to 44,
An axial concave portion 47 communicating with the rear end 46 is provided. An indent 48 at the rear end 46 is formed in close proximity to one of the cavities 45 to identify the two cavities 45,45.

The shell 16 shown in FIGS. 3 and 4 is a one piece drawn metal sleeve. In the prior art disclosed in U.S. Pat. No. 4,804,339, the conductive shell was usually provided with a conductive keyway. This key was assembled to the shell or manufactured integrally with the shell. The disadvantage of this structure is that its manufacture is relatively expensive, such as machining, pressing the key into the shell or machining the key integral with the shell. However, according to the electrical connector of the invention, the key 31 is
Therefore, it is not necessary to form a key on the shell 16, and the shell 16 can be manufactured by an inexpensive operation such as drawing of metal. The shell 16 has a structure suitable for drawing. For example, the shell 16 has a constant cylindrical thickness except for a cylindrical flange 49 protruding from the inner rear end 50, and this flange
49 is formed by making only the front part of the shell 16 cylindrical at the time of drawing. A series of longitudinal slits 51 are formed with a space around the cylindrical front end 52 in communication with the front end 52. Slit 51 is a mating connector (not shown)
The front end 52 can be elastically bent inward (toward the center) at the time of connection. The keyway 53 extends in the longitudinal direction and communicates with the front end 52. Since the keyway 53 and the slit 51 are recessed in the thickness direction of the shell 16, the formation of the shell 16 is not prevented during drawing.

The operation of assembling the connector 1 and the cable 2 shown in FIGS. 2 and 12 will be described. First, nut 1 on cable 2
0, the gasket 11 and the clamp element 12 are sequentially inserted.
Next, the shield 5 is folded over the cup 40 of the clamp element 12. Thereafter, the cable 2 is passed through the sleeve element 13 and the cups 40 and 42 are overlapped on each other to clamp the shield 5 and establish an electrical connection. Each contact 14 is assembled to the corresponding conductor 3. Each contact 14 is assembled along each cavity 45 of the insulating means 15 until the insulating means 15 engages with the front end of the sleeve element 13 and the contacts 14 project outside the insulating means 15. Each conductor 3 is designed to extend uninterruptedly over the recess 47. The shell 16 is assembled in the housing 8, the keyway 53 receives the key 31 and the flange 49
Front shoulder 54 faces and engages rearward shoulder 24 of housing 8. The shell 16 protrudes forward outside the housing 8 and is connected to a mating connector (not shown). The coupling means 9 always covers the protruding part of the shell 16.

Although the shielded electrical connector of the present invention has been described based on the embodiments, the present invention should not be limited to only such embodiments. Those skilled in the art can easily understand that various modifications can be made without departing from the gist of the present invention.

[0018]

According to the shielded electrical connector of the present invention, the conductive shell disposed along the outer periphery of the insulating member for accommodating the contact and the insulating housing disposed along the outer periphery of the conductive shell. The insulating member and the conductive shell each have a keyway extending longitudinally from one end thereof and terminating at an intermediate position, and the insulating housing has a protruding key engaged with the keyway of each member. The key is engaged near the end position of the keyway, so that the fixing direction of the insulating member and the conductive shell is determined, and the insulating member and the conductive shell are moved in one direction with respect to the insulating housing. It is characterized in that it is prevented from falling off, so that the assembly of the conductive shell and the insulating member with respect to the housing determines the fixing direction of each member and prevents the conductive shell and the insulating member from coming off. It can be carried out at the same time. Furthermore, since the conductive shell has no key means protruding, and the insulating housing has the key means protruding, the distance between the contact supported by the insulating member and the conductive shield is sufficiently increased particularly in terms of electrical characteristics. This is effective when it is necessary to keep a distance or a predetermined distance apart. In other words,
According to the shielded electrical connector of the present invention, desired electrical characteristics can be easily obtained by design.

Further, according to the shielded electrical connector of the present invention, the insulating housing is engaged with the insulating coupling by a plurality of cantilever structures including locking lips projecting outward and extending in a substantially arc shape, The conductive shell is positioned so as to substantially contact the inner surface of the cantilever structure when the conductive shell is received in the insulative housing, thereby preventing deflection of the cantilever structure. And the insulating coupling can be easily assembled, and the conductive shell further assembled to the insulating housing prevents bending of the cantilever structure and reliably prevents the conductive shell from falling out of the insulating housing. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of a preferred embodiment of a shielded electrical connector of the present invention assembled into an electrical cable.

FIG. 2 is an exploded perspective view of the electrical connector shown in FIG.

FIG. 3 is an enlarged side sectional view of a part of the conductive shell shown in FIG. 10;

FIG. 4 is an enlarged end view of the conductive shell for an electrical connector shown in FIG. 3;

FIG. 5 is an enlarged view of the insulating housing shown in FIG.

FIG. 6 is an enlarged sectional view of the nut shown in FIG. 8;

FIG. 7 is an enlarged partial cross-sectional view of the assembled insulating housing and nut.

FIG. 8 is an enlarged side view of the nut shown in FIG. 9;

FIG. 9 is an enlarged partial end view of the insulating nut of the shielded electrical connector shown in FIG. 1;

10 is an enlarged side view of the insulating housing of the shielded electrical connector shown in FIG.

11 is an enlarged end view of the insulating housing of the shielded electrical connector shown in FIG.

12 is an enlarged side view of the shielded electrical connector shown in FIG. 1.

13 is an enlarged sectional side view of an insulating nut of the shielded electrical connector shown in FIG. 1.

14 is an enlarged end view of the nut shown in FIG.

15 is an enlarged side view of the nut shown in FIG.

FIG. 16 is a cross-sectional view of a gasket.

FIG. 17 is an enlarged sectional view of a clamp element.

FIG. 18 is an enlarged sectional view of a sleeve element.

19 is a plan view of the bottom of the insulating means of the shielded electrical connector shown in FIG. 1.

FIG. 20 is an end view of the insulating means shown in FIG. 19;

FIG. 21 is a sectional view of the insulating means shown in FIG. 19;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield type electrical connector 8 Insulated housing 9 Insulated coupling 14 Contact 15 Insulated member 16 Conductive shell 27 Locking lip 31 Key 43, 53 Keyway

────────────────────────────────────────────────── (5) References JP-A-57-109272 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 13/62 -13/648 H01R 17 / 04 H01R 23/26

Claims (2)

(57) [Claims] An insulating member for accommodating the contact, a conductive shell disposed along an outer periphery of the insulating member, and an insulating housing disposed along an outer periphery of the conductive shell; The member and the conductive shell are each formed with a keyway extending in a length direction from one end thereof and terminating at an intermediate position, and the insulating housing is connected to the insulating member and the keyway of the conductive shell. A projection key is provided, and the key is engaged near the end position of the keyway to determine the fixing direction of the insulating member and the conductive shell, and the insulating member with respect to the insulating housing. And a shielded electrical connector, wherein the conductive shell is retained on the one side. 2. A conductive shell placed along an outer periphery of an insulating member for accommodating a contact, an insulating housing for receiving the conductive shell, and being rotated outside the insulating housing when mating with a mating connector. A shielded electrical connector having an insulative coupling that is retained such that the insulative housing is engaged with the insulative coupling by a plurality of cantilever structures including locking lips projecting outwardly and extending in a generally arcuate shape. When the conductive shell is received in the insulating housing, the conductive shell is placed so as to substantially contact the inner surface of the cantilever structure, thereby preventing bending of the cantilever structure. Shielded electrical connector.