JP5048580B2 - Shield connector - Google Patents

Description

  The present invention relates to a shielded connector connected to a shielded cable such as a shielded twisted pair electric wire or a coaxial cable.

  In general, a twisted pair electric wire called STP (Shield Twisted Pair), which has two signal lines twisted together, is used inside a shield conductor. The feature is that the influence of electromagnetic induction can be reduced by reversing the direction of the magnetic field generated by the adjacent wire loops formed by this twisted twist and canceling each other's generated magnetic field. In this case, it is known that the outer side is further covered with a shield conductor, so that it is difficult to radiate electromagnetic induction noise to the outside and it is difficult to receive noise from the outside, and it is widely used as a LAN cable for high-speed transmission.

  Usually, such shielded twisted-pair electric wires are processed by terminal processing and connected to a dedicated connector called a modular connector. Recently, electric devices mounted on automobiles such as car navigation systems have been used with such shielded twisted-pair electric wires. May constitute an in-vehicle network.

  As a shield connector connected to the terminal part of this shield twisted pair electric wire, there exists a thing of the composition indicated by the following patent documents 1, 2, for example.

  The shield shell provided in the shield connector disclosed in Patent Document 1 is composed of a shield case and a shield cover, and the shield cover has an opening of the shield case used when accommodating and holding an inner housing that accommodates a plurality of terminals. It is supposed to close. Moreover, such a shield shell is inserted from the rear opening part of the outer housing disclosed by patent document 2, and is accommodated and held in the shell accommodating chamber of the outer housing.

  Such a shield shell is provided with a pair of projecting pieces cut and raised outward from the outer surface of the shield shell as a structure that realizes a function of stopping and preventing the shield shell from being stopped in the shell housing chamber of the outer housing. And a locked portion in which an opening is formed in association with the cut and raised formation of the pair of protruding pieces.

  In addition, the shell housing chamber of the outer housing is brought into contact with the front end of the protruding piece of the locked portion of the shield shell and stopped in front, and can be bent and deformed in the height direction, and after being bent and deformed, it is restored. A lance that locks the front end of the opening of the locked portion of the shield shell and prevents the shield shell from coming off is provided. In this case, the rear end of the lance is cantilevered in the shell housing chamber, and the front end can be bent and deformed.

Japanese Patent Laid-Open No. 2006-32211 JP 2006-147359 A

  However, since the opening portion is formed in the above-described locked portion of the shield shell as the protruding piece is cut and raised, the leakage amount of electromagnetic waves through the opening portion and the intrusion amount from the outside There is a problem that noise resistance is reduced due to an increase in noise. Further, there is a problem that the electric wire is easily damaged by the protruding piece of the locked portion of the shield shell.

  Therefore, the problem to be solved by the present invention is to provide a shield connector having a configuration in which there is no opening in the locked portion of the shield shell to be locked to the stopper and the lance provided in the shell housing chamber of the outer housing. is there.

  In order to solve the above problems, the present invention provides a shield connector in which a shield shell that covers the outer periphery of an inner housing that accommodates terminals is inserted and retained from a rear opening of the outer housing, and the shell housing of the outer housing is accommodated. In the room, there are provided a stopper for stopping the shield shell in front and a lance that can be bent and deformed in the height direction and once returned after being bent and deformed to prevent the shield shell from coming off. On the outer surface, a locked portion protruding in a trapezoidal shape is formed by knocking a part of the outer surface outward, and the front end edge of the locked portion is brought into contact with the stopper and stopped in front. The gist is that the rear end edge of the locked portion is locked to the lance and is prevented from coming off.

  According to the shield connector having such a configuration, since the locked portion of the shield shell that is stopped by the stopper provided by the stopper provided in the shell housing chamber of the outer housing and is prevented from coming off by the lance is formed by knocking out. Since there is no opening formed in the shield shell provided in the shield connector as disclosed in Patent Documents 1 and 2, a decrease in shield performance is suppressed. Moreover, since there is no protrusion like a protruding piece, there is no possibility that the electric wire is damaged.

  In this case, the front end edge and the rear end edge of the locked portion are formed with cut surfaces that are cut and raised by knocking out, and the cut surfaces of the front end edges come into contact with the stopper and are stopped in front. At the same time, if the cut surface of the rear end edge is locked to the lance so as to be prevented from coming off, the front stop and the coming-out prevention of the shield shell in the shell housing chamber of the outer housing can be strengthened. .

  Further, the front end edge of the locked portion is formed with a tapered guide surface that bends and deforms the lance when the shield shell is inserted into the shell housing chamber of the after housing. In addition, there is little catching when the shield shell is inserted into the shell housing chamber, and such insertion is facilitated and workability is improved.

  According to the shield connector according to the present invention having the above-described configuration, the locked portion of the shield shell, which is locked in front and stopped by the stopper and the lance provided in the shell housing chamber of the outer housing, is the shield shell. A configuration that protrudes in a trapezoidal shape by knocking out a part of the outer surface, that is, a configuration that does not have an opening that degrades the shield performance, so it improves the shield performance compared to conventional shield connectors It becomes possible to make it.

  Embodiments of a shield connector according to the present invention will be described below with reference to the drawings. The shield connector according to this embodiment is applied to a multipolar shielded cable having a large number of signal lines. In this example, a case where the shield connector is applied to a shielded twisted pair electric wire having four signal lines will be described.

  The shield connector 1 described below includes an electrical connector 2 shown in FIG. 1 and an outer housing 8 shown in FIG. 4 that accommodates and holds the electrical connector 2. In the following description, the fitting direction with a shield shield connector (not shown) is assumed to be the front.

  FIG. 1 is an exploded perspective view of an electrical connector 2 provided in the shield connector 1. As shown in the figure, the electrical connector 2 connected to the terminal portion of the shield twisted pair electric wire W includes an inner conductor terminal 3, an inner housing 4, and a shield shell 5.

  The inner conductor terminal 3 is connected to the signal conductor Wb of the signal line Wa of the shielded twisted pair electric wire W and transmits a high-frequency signal, and has a so-called male type terminal shape. The inner housing 4 that accommodates the inner conductor terminal 3 is for insulating the inner conductor terminal 3 and the shield shell 5 from each other, and is formed of a resin material having a predetermined dielectric constant. The inner conductor terminal 3 is inserted and accommodated from the rear of the inner housing 4.

  The shield shell 5 is connected to the shield conductor Wd of the shield twisted pair electric wire W and covers the periphery of the inner conductor terminal 3 to electromagnetically shield it. The shield shell 5 includes a shield case 6 and a shield cover 7 assembled to the shield case 6.

  The shield case 6 is formed by bending a conductive plate, and has a substantially rectangular tube-shaped main body 6a in which the inner housing 4 is accommodated, and connection pieces 6e, 6e extending rearward from the main body 6a. It has. On the left and right side walls of the main body 6a, elastic contact pieces 6f and 6f for elastically contacting the outer surface of the other-side shield shell (not shown) fitted inside are bent slightly inside so as to face each other. Yes.

  An opening 6b is formed on the rear upper surface of the main body 6a to facilitate accommodation of the inner housing 4. The shield cover 7 is provided with a cover portion 7a so as to close the opening 6b. Moreover, the recessed part 6c, 6c is formed in the upper end of the left-right side wall of the opening part 6b, and the bending pieces 7c, 7c of the shield cover 7 are mounted | worn with it.

  Projections 6d, 6d projecting outward are formed below the recesses 6c, 6c, and the projections 6d, 6d are engagement holes 7d formed in the bent pieces 7c, 7c of the shield cover 7. , 7d, the shield cover 7 is prevented from being easily detached from the shield case 6.

  The connection pieces 6e, 6e provided on the rear side of the shield case 6 have a band plate shape opened upward from the bottom surface. The connection pieces 6e and 6e are covered with the shield conductor Wd of the shield twisted pair electric wire W so that the shield conductor crimping pieces 7g and 7g and the sheath crimping pieces 7h and 7h of the shield cover 7 are caulked from above. It has become.

  As shown in FIGS. 3A and 3B, the connection pieces 6e and 6e after crimping are bent into a substantially circular shape with their tips abutting each other. In this case, an insertion hole 6i is formed in the bottom surface below the connection pieces 6e, 6e, and the shield conductor crimping piece 7g of the shield cover 7 as shown in FIG. 3A is formed in the insertion hole 6i. The protrusions 7i and 7i formed at the tip of 7g are inserted together with the shield conductor Wd during the caulking process.

  The shield cover 7 is formed by bending a conductive plate like the shield case 6. The shield cover 7 includes a cover portion 7a having a shape that closes the opening 6b of the shield case 6 described above, and a crimping portion 7f provided behind the cover portion 7a. Since the opening 6b of the shield case 6 described above is closed by the shield cover 7, a decrease in shield performance is suppressed.

  In the middle of the cover portion 7a, an inclined portion 7b inclined rearward is formed, and a crimping portion 7f extends from the rear of the inclined portion 7b. The crimping portion 7f includes a pair of shield conductor crimping pieces 7g and 7g having a strip shape opened downward from the upper surface, and a pair of sheath crimping pieces 7h and 7h having a strip shape opened downward from the upper surface. Is provided.

  At the center of the lower end of the shield conductor crimping pieces 7g, 7g, projections 7i, 7i projecting downward are formed. As described above, the projections 7i and 7i are fitted together with the shield conductor Wd in the fitting hole 6i formed in the bottom surface of the connection pieces 6e and 6e of the shield case 6 during caulking (FIG. 3A )reference). Note that the protrusions 7i and 7i are bent inward in advance so that the insertion of the shield conductor Wd into the insertion hole 6a is facilitated when the projection 7i is inserted into the insertion hole 6i.

  As shown in FIG. 3A, when the shield conductor crimping pieces 7g and 7g are crimped on the shield conductor Wd placed on the connection pieces 6e and 6e, the connection pieces 6e and 6e are formed into a cylindrical shape. While being bent, the shield conductor Wd is sandwiched between the connection pieces 6e, 6e and the shield conductor crimping pieces 7g, 7g. Thereby, the shield shell 5 provided in the electrical connector 2 and the shield conductor Wd provided in the shield twisted pair electric wire W are electrically connected.

  As shown in FIG. 3B, when the sheath crimping pieces 7h and 7h are crimped on the shield conductor Wd and the sheath We over the connection pieces 6e and 6e, the connection piece 6e is similarly formed. , 6e are bent into a cylindrical shape, and the shield conductor Wd and the sheath We are sandwiched between the connection pieces 6e, 6e and the sheath crimping pieces 7h, 7h. Thereby, the electrical connector 2 is fixed so as not to easily come off from the terminal portion of the shield twisted pair electric wire W.

  The connection process of the shielded twisted pair electric wire W to the electrical connector 2 having such a configuration includes: i) exposing the signal conductor Wb and the shielded conductor Wd to a predetermined length by peeling the shield twisted pair electric wire W terminal; ii) signal The inner conductor terminal 3 is connected to the conductor Wb, iii) the inner conductor terminal 3 is accommodated in the inner housing 4, iv) the inner housing 4 is accommodated in the shield case 6, and at the same time the shield pieces Wd are covered on the connection pieces 6e, 6e, v) The cover portion 7a of the shield cover 7 is attached to the opening 6b of the shield case 6, and the seal conductor Wd and the sheath We are crimped by the crimping portion 7f of the shield cover 7 and the connection pieces 6e and 6e of the shield case 6. It is a process of performing simultaneously.

  The shield shell 5 provided in the electrical connector 2 having such a configuration is provided with a locked portion 10 used when being housed and held in a shell housing chamber 8c of an outer housing 8 described later. In this case, as shown in FIG. 1, a locked portion 10 is formed on the bottom surface of the main body portion 6a of the shield case 6 so as to project downward by hammering.

  FIG. 2 shows an external perspective view of the locked portion 10 as viewed from the lower side of the shield case 6. As shown in the drawing, the locked portion 10 includes a trapezoidal portion 10 a that protrudes in a trapezoidal shape from the outer surface of the shield case 6 toward the outside. Cut surfaces 10c, 10c cut and raised are formed on both sides of the front end edge 10b of the trapezoidal portion 10a, and similarly cut surfaces 10e are formed on the rear end edge 10d of the trapezoidal portion 10b. Further, a tapered guide surface 10f that is inclined forward from the center of the front edge 10b of the trapezoidal portion 10a is formed.

  Next, the outer housing 8 in which the electric connector 2 described above is accommodated and held will be described with reference to FIGS. As shown in the drawing, the outer housing 8 is formed in a substantially rectangular tube shape from an insulating resin material, and the electrical connector 2 described above can be accommodated and held therein.

  In front of the outer housing 8, there is provided a rectangular tubular hood portion 8a capable of accommodating the outer housing of the mating shield connector to be fitted. Similarly, a rectangular tube-shaped connector housing portion 8b is provided rearward from the hood portion 8a, and the above-described electrical connection is provided in the shell housing chamber 8c formed in the inner space of the connector housing portion 8b. The shield shell 5 included in the child 3 can be accommodated. In this case, the shield shell 5 is inserted and accommodated from the rear opening 8d of the shell accommodating chamber 8c.

  Further, an opening 8e is formed in the upper surface of the shell housing chamber 8c, and the electric wire holding plate 8f can block the opening 8e. The electric wire holding plate 8f is provided with an electric wire holding portion 8g recessed in an arc shape. As shown in FIG. 9, the shield twisted pair electric wire W connected to the electric connector 2 is bent carelessly. Sometimes, it has a function of holding the shield twisted pair electric wire W so that bending stress is not applied to the crimping portion 7f. The electric wire holding plate 8f is integrally connected to the front end edge of the opening 8e via a hinge 8h, and the electric wire holding plate 8f can be bent backward from the position of the hinge portion 8h.

  In addition, the bottom wall of the shell housing chamber 8c, that is, the outermost wall 8i on the lower side of the outer housing 8, can be bent and deformed in the height direction, and once bent and deformed, it is returned to the shield shell 5. A lance 11 for locking the locked portion 10 is provided. In this case, the lance 11 is formed in a doubly supported shape supported by the front and rear end portions 11b and 11c by a pair of slits 11a and 11a formed in the front-rear direction of the outermost wall 8i.

  On the inner surface of the substantially central portion of the lance 11, an engaging portion 11 d is formed protruding upward so that the engaged portion 10 of the shield shell 5 can get over when the lance 11 is bent and deformed. ing.

  In this case, the upper surface 11e of the locking portion 11d is formed so as to be flush with the bottom surfaces 8j and 8j of the outermost wall 8i around it. In addition, a tapered surface 11f is formed in front of the locking portion 11d to facilitate overcoming the locked portion 10 of the shield shell 5. When the guide surface 10f of the locked portion 10 of the shield shell 5 comes into contact with the tapered surface 11f, the locking portion 11d is bent downward and deformed as shown in FIG.

  Behind the lance 11, a locked portion insertion groove 11g that is recessed from the inner bottom surfaces 8j, 8j of the outermost wall 8i extends to the rear opening 8d, and this locked insertion groove 11g is shielded. This is an insertion path for the locked portion 10 of the shell 5.

  Cut surfaces 10c, 10c of the front end edge 10b of the locked portion 10 of the shield shell 5 are in contact with the joint portion between the front end of the locked portion insertion groove 11g and the bottom surfaces 8j, 8j of the outermost wall 8i. The stoppers 12 and 12 are formed to restrict the forward movement of the shield shell 5 and stop the shield shell 5 forward.

  In addition, the cutting surface 10e of the rear end edge 10d of the locked portion 10 of the shield shell 5 is locked in front of the locking portion 11d of the lance 11 to restrict the rearward movement of the shield shell 5. A locking surface 11h that prevents the slipping is formed.

  Next, a procedure for accommodating and holding the electrical connector 2 in the shield connector 1 described above in the outer housing 8 will be described with reference to FIGS. 6 to 9.

  As shown in FIG. 6, when the electrical connector 2 is inserted from the rear opening 8d of the outer housing 8, the electrical connector 2 is moved along the bottom surfaces 8j and 8j of the shell housing chamber 8c as shown in FIG. The lower surface of the shield shell 5 is moved to the left side. At this time, the locked portion 10 provided on the lower surface of the shield shell 5 is moved to the left in the locked portion insertion groove 11g provided in the bottom surfaces 8j and 8j.

  Next, as shown in FIG. 8, when the locked portion 10 of the shield shell 5 comes into contact with the locking portion 11d of the lance 11, the lance 11 is bent and deformed downward about the locking portion 11d. In this case, the bending deformation of the lance 11 is such that the tapered surface 11f of the locking portion 11d is in contact with the guide surface 10f of the locked portion 10 and the rear end edge 10d of the locked portion 10 is the locking portion 11d. It is until it gets over the upper surface 11e.

  Thereafter, as shown in FIG. 9, when the locked portion 10 of the shield shell 5 gets over the locking portion 11 d of the lance 11, the cut surfaces 10 c and 10 c of the front end edge 10 b of the locked portion 10 become the stopper 12. , 12 and the front end is stopped, and the cut surface 10e of the rear end edge 10d of the locked portion 10 is locked from behind by the locking surface 11h of the locking portion 11d and is prevented from coming off. Then, the electric wire connector 2 is accommodated and held in the outer housing 8 by bending the electric wire holding plate 8f of the outer housing 8 and closing the opening 8e.

  As described above, according to the shield connector 1 described above, the shield shell 5 that is stopped in front by the stopper 12 provided in the shell housing chamber 8 c of the outer housing 8 and is also prevented from being detached by the locking portion 11 d of the lance 11. Since the locked portion 10 is formed in a trapezoidal shape by knocking out so as not to have an opening portion, the opening portion which the locked portion of the shield connector of Patent Documents 1 and 2 described in the related art has Due to the absence of this, a decrease in shielding performance is suppressed.

  In this case, the front end edge 10b and the rear end edge 10d of the locked portion 10 of the shield shell 5 are respectively formed with cut surfaces 10c and 10e cut and raised in a trapezoidal shape, and the front end edge 10b The cut surface 10c of the outer housing 8 is brought into contact with the stopper 12 and stopped at the front, and the cut surface 10e of the rear edge 10d is locked by the locking portion 11d of the lance 11 to prevent the outer housing 8 from being removed. The shield shell 5 is firmly stopped and prevented from coming off in the storage chamber 8c.

  In addition, a tapered guide surface 10f that bends and deforms the lance 11 when the shield shell 5 is inserted into the shell housing chamber 8c of the after housing 8 is provided at the front end edge 10b of the locked portion 10 of the shield shell 5. Therefore, there is little catching when inserting the shield shell 5 into the shell accommodating chamber 8c, and such insertion is facilitated and workability is improved.

  As mentioned above, although the embodiment of the shield connector concerning the present invention was described, the present invention is not limited to such an embodiment at all, and can be implemented in various modes without departing from the gist of the present invention. Of course. For example, in the above-described embodiment, the trapped portion 10 of the shield shell 5 is configured to be trapped in a trapezoidal shape. However, the locked portion 10 by knocking out is limited to such a shape. Instead, various shapes can be applied.

It is the disassembled perspective view which showed schematic structure of the electrical connector with which the shield connector which concerns on one Embodiment of this invention is provided. It is an external appearance perspective view which expands and shows the to-be-latched part provided in the shield shell of the electrical connector of FIG. It is the figure which showed the cross section of the electrical connector after a crimping process. It is the external appearance perspective view which showed schematic structure of the outer housing with which the shield connector which concerns on one Embodiment of this invention is provided. It is the figure which showed the cross section of the outer housing of FIG. It is sectional drawing which showed the shield connector of the state before an electrical connector is accommodated in an outer housing. It is sectional drawing which showed the shield connector of the state in the middle of accommodating an electrical connector in an outer housing. It is sectional drawing which showed the shield connector of the state which the lance bent and deformed, when an electrical connector is accommodated in an outer housing. It is sectional drawing which showed the shield connector of the state after the electrical connector was accommodated in the outer housing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shield connector 2 Electric connector 3 Inner conductor terminal 4 Inner housing 5 Shield shell 8 Outer housing 8c Shell accommodating chamber 8d Back opening part 8i Bottom wall (outermost wall)
8j Bottom surface 6 Seal case 10 Locked portion 10a Trapezoidal portion 10b Front end edge 10c Cutting surface 10d Rear end edge 10e Cutting surface 10f Guide surface 11 Lance 11a Slit 11b Front end portion 11c Rear end portion 11d Locking portion 11e Upper surface 11f Tapered surface 11g Locked portion insertion groove 11h Locking surface 12 Stopper W Shield twisted pair electric wire Wa Signal line Wb Signal conductor Wd Shield conductor We Sheath

Claims (3)

  A shield connector in which a shield shell that covers the outer periphery of the inner housing that accommodates the terminals is inserted and received from the rear opening of the outer housing, and the shield shell is stopped in the shell housing chamber of the outer housing. And a lance that can be bent and deformed in the height direction and that once returns after being bent and deformed to prevent the shield shell from falling off, a part of the outer surface is provided on the outer surface of the shield shell. A locked portion protruding in a trapezoidal shape is formed by knocking outward, the front edge of the locked portion abuts against the stopper and is stopped in front, and the rear edge of the locked portion is A shield connector, wherein the shield connector is retained by the lance.   The front end edge and the rear end edge of the locked portion are respectively formed with cut surfaces that are cut and raised by hammering, and the front end edge cuts against the stopper and stops in front, 2. The shield connector according to claim 1, wherein a cut surface of the rear end edge is locked to the lance and is prevented from coming off.   The front end edge of the locked portion is formed with a taper-shaped guide surface that bends and deforms the lance when the shield shell is inserted into the shell housing chamber of the after-housing. Item 3. The shield connector according to Item 1 or 2.

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