JP2019114457A - Shield terminal unit and connector - Google Patents

Abstract

To facilitate impedance matching with a cable or a mating connector connected with a shield terminal unit, while securing easy assembling of the shield terminal unit and strength of the shield case.SOLUTION: The shield case 21 of a shield terminal unit 11 has a shield case body 22 and a shield cover 41, and in the shield cover 41, an upper recess 45 recessed downward is formed at a left-right direction intermediate part on the front part front side of an upper wallboard 42. Furthermore, by recessing the left-right direction intermediate part downward on the front part front side of the upper wallboard 42, insertion grooves 46 opening downward are formed, respectively, at the coupling part of the front part front side of the upper wallboard 42 and a cover left wallboard 43, and at the coupling part of the front part front side of the upper wallboard 42 and a cover right wallboard 44, and the upper end on the front part front side of a body left wallboard 25 and the upper end on the front part front side of a body right wallboard 26 are inserted, respectively, into these insertion grooves 46.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a shield terminal unit and a connector used for electrical connection between electronic devices and electrical devices.

  For example, as a cable connector used for transmission of high frequency signals, such as transmission of video signals from a digital camera to an electronic control unit (ECU) in a car, a plurality of terminals to which a plurality of core wires of multicore shielded cables are connected; There is known a cable connector including a metal shield case for shielding the terminals and a resin housing for accommodating the shield case (see, for example, Patent Document 1).

JP, 2013-45725, A

  In order to improve the transmission quality of high frequency signals, in addition to the improvement of noise resistance by shielding, the signal waveform is obtained by matching the impedance between the cable connector and the shielded cable or mating connector connected to it. It is required to suppress the quality deterioration or to reduce the transmission loss of the signal.

  In the cable connector, a plurality of terminals to which a plurality of core wires of the shielded cable are respectively connected are accommodated in the shield case in a state of being supported by a terminal support member made of resin. Further, in the shield case, the ends of a plurality of wires exposed from the braid of the shielded cable are accommodated in order to connect the respective core wires of the shielded cable to the respective terminals. The impedance of the cable connector can be adjusted by adjusting the distance between each terminal and the wall of the shield case, and the distance between the end of the wire and the wall of the shield case. Moreover, adjustment of these distances can be performed by adjusting the diameter dimension and shape of a cylindrical shield case.

  However, if the diameter of the shield case is reduced, for example, to adjust the impedance, the assemblability of the cable connector may be degraded. For example, after the terminal to which the core wire of the shield cable is connected is supported by the terminal support member, the terminal support member is inserted into the shield case from the opening at the rear end of the cylindrical shield case. The connector can be easily assembled. However, if the diameter dimension of the shield case becomes smaller, it becomes difficult to insert the terminal support member from the opening at the rear end of the shield case into the shield case, and the assemblability deteriorates.

  On the other hand, the assemblability of the cable connector can be improved by making it possible to divide the shield case into, for example, two members, the main body and the cover. For example, the cable connector can be easily assembled by placing the terminal support member on which the terminal to which the core wire is connected is supported on the main body of the shield case and mounting the cover of the shield case from above the main body. However, if the shield case is divided into a plurality of members, the strength of the shield case may be reduced, and the shield case may be easily deformed by an external force.

  The present invention has been made in view of, for example, the problems as described above, and an object of the present invention is to provide a shield terminal unit and connector capable of easily achieving impedance matching while securing ease of assembly and strength of a shield case. It is to provide.

  In order to solve the above problems, a shield terminal unit of the present invention is a shield terminal unit connected to an end of a cable provided with a plurality of electric wires and a shield conductor surrounding the plurality of electric wires. A plurality of terminals to which the core wire is respectively connected, a terminal support member for supporting the plurality of terminals, and a conductive material, and a shield which surrounds each terminal and an end portion of each wire and which is exposed from the shield conductor The shield case has a case body, a cover, and a locking mechanism for locking the cover to the case body. The case body is formed of the lower wall plate and the pair of left and right first side wall plates. A terminal support member on which each terminal is supported, and a housing portion for housing a portion of each wire which is an end portion of the electric wire and which is exposed from the shield conductor; The cover has an upper wall plate covering the upper side of the accommodation portion, and a pair of first side walls from both left and right end portions of the upper wall plate. And a pair of second side wall plates extending respectively downward on the outer side of the front portion of the plate, and a left and right direction intermediate portion of the front portion of the upper wall plate is depressed downward to thereby form the upper wall plate and the pair of second side wall plates In each of the connecting portions, insertion grooves opened downward are respectively formed, and the upper end portions of the front portions of the pair of first side wall plates are respectively inserted in these insertion grooves.

  Further, in the shield terminal unit of the present invention, the connecting portions of the upper wall plate and the pair of second side wall plates are respectively raised above the upper surface of the left and right direction middle portion of the upper wall plate front portion. It is preferable that the cross-sectional shape of is reverse U-shaped.

  In the shield terminal unit of the present invention, it is preferable that a part of the upper wall plate is bent so that the lower surface of the upper wall plate rear portion is positioned lower than the lower surface of the left and right direction middle portion of the upper wall plate front portion. .

  Further, in the shield terminal unit of the present invention, it is preferable that the cover is provided with a shield conductor connection portion contacting the shield conductor or the cable fixing portion.

  Further, in the shield terminal unit of the present invention, the terminal support member on which each terminal is supported is surrounded by the left and right direction middle portion of the upper wall plate front portion, the lower wall plate front portion and the pair of first side wall plate front portions. It is preferable that the end portion of the portion exposed from the shield conductor is surrounded by the upper wall plate rear portion, the lower wall plate rear portion and the pair of first side wall plate rear portions.

  Further, in the shield terminal unit according to the present invention, it is preferable that a lower recess recessed downward above the lower wall plate front portion and the lower portion of the cable fixing portion is formed in the lower wall plate rear portion. Further, in the shield terminal unit according to the present invention, in the rear of each first side wall plate, the lateral side is recessed inward in the left-right direction of the case body than the front portion of the first side wall plate and the side portion of the cable fixing portion. Preferably, a recess is formed.

  Moreover, in order to solve the said subject, the connector of this invention is equipped with the shield terminal unit of the said invention, and the housing which accommodates the said shield terminal unit.

  According to the present invention, it is possible to easily achieve impedance matching with a cable connected to the shield terminal unit, a mating connector or the like while securing the ease of assembly of the shield terminal unit and the strength of the shield case.

It is an outline view showing the 1st and 2nd connector of an embodiment of the present invention. It is an external view which shows the 1st and 2nd shield terminal unit of embodiment of this invention. It is a disassembled perspective view of a 1st shield terminal unit. It is a longitudinal cross-sectional view of a 1st shield terminal unit. It is a cross-sectional view of the shield case of a 1st shield terminal unit. It is an explanatory view showing a part of shield case of the 1st shield terminal unit. It is the external view which looked at the shield case main body of the 1st shield terminal unit from the upper part. It is the external view which looked at the shield case main body of the 1st shield terminal unit from the left. It is the external view which looked at the shield cover of a 1st shield terminal unit from upper direction. It is the external view which looked at the shield cover of the 1st shield terminal unit from the left. It is a disassembled perspective view of a 2nd shield terminal unit. It is a longitudinal cross-sectional view of a 2nd shield terminal unit. It is a cross-sectional view of the shield case of a 2nd shield terminal unit. It is an external view which shows the modification of the shield terminal unit of embodiment of this invention.

(First connector, second connector)
FIG. 1 shows a first connector 1 and a second connector 2 according to an embodiment of the present invention. FIG. 2 shows the first shield terminal unit 11 and the second shield terminal unit 71 according to the embodiment of the present invention. Note that when describing the direction regarding the connector 1 and the shield terminal unit 11, the front (F1), the rear (B1), the left (L1), the right (R1), and the upper depicted in the lower right of FIGS. Follow the arrows which indicate the direction of (U1), down (D1). Also, when describing the direction regarding the connector 2 and the shield terminal unit 71, the front (F2), the rear (B2), and the left (in the lower left of FIGS. 1 and 2 and the lower right of FIGS. 11 to 13). L2) Follow the arrows indicating the direction of right (R2), upper (U2), lower (D2). In addition, these directions are set only for the facilities of description.

  The connectors 1 and 2 shown in FIG. 1 are both cable connectors and can be connected to each other. Further, the cable 3 is connected to the connector 1, and the cable 4 is connected to the connector 2. The cables 3 and 4 are each a 4-core shielded cable.

  The connector 1 includes a shield terminal unit 11 shown in FIG. 2 and a housing 91 for housing the shield terminal unit 11. The housing 91 is cylindrically formed of an insulating material such as resin. The shield terminal unit 11 is connected to the end of the cable 3. Further, the shield terminal unit 11 is supported in the housing 91 by unit locking portions 33 and 34, which will be described later, and a retainer (not shown) attached to the housing 91.

  The connector 2 includes a shield terminal unit 71 shown in FIG. 2 and a housing 95 for housing the shield terminal unit 71. The housing 95 is cylindrically formed of an insulating material such as resin. The shield terminal unit 71 is connected to the end of the cable 4. Further, the shield terminal unit 71 is supported in the housing 95 by unit locking portions 78 and 34 described later and a retainer (not shown) attached to the housing 95.

  When connecting the connectors 1 and 2 to each other, the fitting portion 92 formed on the front of the housing 91 of the connector 1 is inserted into the fitting hole 96 formed on the front of the housing 95 of the connector 2. When the fitting portion 92 is inserted into the fitting hole 96, the four terminals 12 of the shield terminal unit 11 and the four terminals 72 of the shield terminal unit 71 contact with each other and are electrically connected to each other. At the same time, the shield case contact portion 61 of the shield case 21 of the shield terminal unit 11 and the shield case contact portion 85 of the shield case 75 of the shield terminal unit 71 contact each other and are electrically connected to each other. Further, when the fitting portion 92 is inserted to the back of the fitting hole 96, the connector 1 and the connector 2 are locked by the lock mechanism 93 provided in the housing 91.

(First shield terminal unit)
FIG. 3 shows the first shield terminal unit 11 in a disassembled state. FIG. 4 shows a vertical cross section of the shield terminal unit 11 as viewed in the direction of arrows IV-IV in FIG. As shown in FIGS. 2 and 3, the shield terminal unit 11 has four terminals 12, a terminal support member 13 and a shield case 21.

  Each terminal 12 is formed of, for example, a conductive material such as brass or phosphor bronze. As shown in FIG. 4, a substantially cylindrical terminal contact portion 12A in contact with the terminal 72 of the second shield terminal unit 71 is formed on the front end side of each terminal 12, and the rear end side of each terminal 12 is formed. A barrel 12B for connecting the core wire 6 of the cable 3 is formed.

  The cable 3 is formed by covering the four electric wires 5 formed by covering the core wire 6 with the insulator 7 with the braid 8 as a shield conductor and further covering the braid 8 with the sheath 9 formed of an insulating material. It is done. In order to connect the cable 3 to the shield terminal unit 11, the end of the sheath 9 is cut off in the cable 3, and the end of the braid 8 is folded back so as to cover the outer peripheral side of the sheath 9. Is exposed from the braid 8. Further, the insulator 7 is cut off at the tip of each wire 5, the tip of the core wire 6 is exposed from the insulator 7, and the tip of the exposed core 6 is crimped to the barrel 12 B of the terminal 12.

  The terminal support member 13 is a member for supporting the respective terminals 12, and is formed in a substantially rectangular parallelepiped shape by an insulating material such as a resin. Further, four terminal mounting grooves 14 are formed in the terminal support member 13, and four terminals 12 to which the core wire 6 is crimped are respectively mounted and supported in the terminal mounting grooves 14. Further, four communication holes 15 are formed in the front end portion of the terminal support member 13 so as to correspond to the front end portions of the four terminals 12.

  The shield case 21 is generally formed in a substantially rectangular cylindrical shape as a whole by a conductive material such as stainless steel, and surrounds each terminal 12 and an end portion of each wire 5 and a portion exposed from the braid 8 . The shield case 21 has a shield case body 22 and a shield cover 41. Furthermore, the shield case 21 has a main body locking portion 31 and a cover locking portion 53 as a locking mechanism.

  FIG. 5 shows a cross section of the shield case 21 as viewed in the direction of arrows V-V in FIG. FIG. 6 shows the front portion of the shield case 21 as viewed from the rear left upper side. FIG. 7 shows the shield case body 22 as viewed from above, and FIG. 8 shows the shield case body 22 as viewed from the left. The shield case body 22 is a terminal support member 13 on which the terminals 12 are supported, and an accommodation portion 23 for accommodating a portion which is an end of each electric wire 5 and is exposed from the braid 8 and a shield of the second shield terminal unit 71. Lower plate portion 35, left plate portion 36 and right plate portion 37 constituting a part of shield case contact portion 61 in contact with case 75, and the end of cable 3 are fixed, and shield case body 22 and braid 8 And a cable fixing portion 38 electrically connecting the The shield case body 22 is formed, for example, by press molding.

  A portion from the position a to the position d in FIG. 7 or 8 in the front-rear direction of the shield case main body 22 is a housing portion 23. The housing portion 23 is formed by the lower wall plate 24 and the pair of left and right first side wall plates (main body left wall plate 25 and main body right wall plate 26) so that the cross-sectional shape is substantially U-shaped. .

  Further, a lower recessed portion 27 is formed in the left-right direction middle portion at the front portion (portion from the position a to the position c) of the lower wall plate 24. The lower recess 27 extends from the front end to the rear end of the front of the lower wall plate 24. As shown in FIG. 5, the lower surface of the lower wall plate 24 is recessed upward, and the upper surface of the lower wall plate 24 is raised upward correspondingly, as shown in FIG. There is.

  In addition, a lower recess 28 is formed in the entire area of the rear portion (a portion from the position c to the position d) of the lower wall plate 24. In the lower wall plate 24 in the portion where the lower recess 28 is formed, the lower surface of the lower wall plate 24 is recessed upward, and the upper surface of the lower wall plate 24 is raised correspondingly. Moreover, the left recessed part 29 as a horizontal recessed part is formed in the whole area of the rear part (part from the position c to the position d) of the main body left wall board 25. As shown in FIG. In the portion where the left recess 29 is formed in the main body left wall plate 25, the left surface of the main body left wall plate 25 is recessed right, and the right surface of the main body left wall plate 25 is raised rightward correspondingly. Further, a right recess 30 as a horizontal recess is formed in the entire area of the rear portion (a portion from the position c to the position d) of the main body right wall plate 26. In the portion where the right recess 30 is formed in the main body right wall plate 26, the right surface of the main body right wall plate 26 is recessed to the left, and the left surface of the main body right wall plate 26 is raised to the left correspondingly. Further, in the lower wall plate 24, the portion where the lower recess 28 is formed is recessed above the lower portion of the cable fixing portion 38, and the portion where the left recess 29 is formed in the main body left wall plate 25 is the cable fixing portion The portion of the right wall plate 26 in which the right recess 30 is formed is recessed inward (rightward) than the side portion (left portion) 38 of the main body right wall plate 26 is inside (right portion) of the cable fixing portion 38 On the left). In addition, the degree of depression (swelling) in the lower recess 28 gradually increases rearward from the front end (position c) at the rear of the lower wall plate 24 and is largest at the middle portion in the front-rear direction at the rear of the lower wall plate 24 And then gradually decrease toward the rear end (position d) at the rear of the lower wall plate 24. The degree of depression (swelling) in each of the left recess 29 and the right recess 30 also changes in the same manner (see FIG. 7). Thereby, the rear part of the accommodating part 23 becomes a narrow shape.

  Further, a main body locking portion 31 is formed on the front portion of the main body left wall plate 25 and the front portion of the main body right wall plate 26. In the present embodiment, the left main body locking portion 31 is formed by recessing a part of the left surface of the main body left wall plate 25 to the right, and the right main body locking portion 31 is the right surface of the main body right wall plate 26. It is formed by denting a part to the left. Further, in the right surface of the main body left wall plate 25, a portion corresponding to the main body locking portion 31 on the left projects rightward, and in the left surface of the main body right wall plate 26, a portion corresponding to the main body locking portion 31 rightward It protrudes. These projecting portions respectively engage with engaging recesses 16 (see FIG. 3) formed on the left and right surfaces of the terminal support member 13. Thereby, the position of the terminal support member 13 in the housing portion 23 is determined.

  Further, as shown in FIG. 8, the upper end surface of the front portion of the main body left wall plate 25 has a rear side portion bordering on a position b on the rear side of the front middle portion in the front portion of the main body left wall plate 25. Lowering than the front part, a step 32 is formed between these parts. Similarly, a stepped portion 32 is also formed at the upper end of the front portion of the main body right wall plate 26. As shown in FIG. 6, corner portions 50 </ b> A of the shield cover 41 are in contact with the step portions 32, respectively. Thereby, the position in the front-rear direction of the shield cover 41 with respect to the shield case main body 22 is determined.

  Further, as shown in FIG. 7 or FIG. 8, a unit locking portion 33 that protrudes leftward is formed at the front of the main body left wall plate 25, and it protrudes rightward at the front of the main body right wall plate 26. A unit locking portion 33 is formed. Further, a unit locking portion 34 projecting upward is formed at the rear of the main body left wall plate 25 and at the rear of the main body right wall plate 26, respectively. These unit locking portions 33, 34 have a function of locking and supporting the shield terminal unit 11 in the housing 91.

  The lower plate portion 35, the left plate portion 36 and the right plate portion 37 are provided on the front end side of the housing portion 23. Specifically, the lower plate portion 35 extends straight forward from the front end of the lower wall plate 24. The left plate portion 36 extends forward from the front end of the main body left wall plate 25 to the left, and then extends forward parallel to the main body left wall plate 25. The right plate portion 37 extends from the front end of the main body right wall plate 26 to the right front, and then extends in parallel to the main body right wall plate 26 to the front. The distance between the left plate 36 and the right plate 37 is greater than the distance between the front of the main left wall 25 and the front of the main right wall 26. Further, the left end of the lower plate 35 and the lower end of the left plate 36 are connected, and the right end of the lower plate 35 and the lower end of the right plate 37 are connected. Further, in each of the lower plate portion 35, the left plate portion 36 and the right plate portion 37, convex contact points 62 are formed so as to protrude inward.

  The cable fixing portion 38 is provided on the rear end side of the housing portion 23. Specifically, the cable fixing portion 38 is coupled to the rear wall of the lower wall plate 24, the main body left wall plate 25 and the main body right wall plate 26. The cable fixing portion 38 is a barrel, and the end portion of the cable 3 in which the braid 8 is folded is crimped to the cable fixing portion 38. Thereby, the cable fixing portion 38 and the braid 8 contact each other, and the cable 3 is supported by the cable fixing portion 38.

  FIG. 9 shows the shield cover 41 viewed from above, and FIG. 10 shows the shield cover 41 viewed from the left. The shield cover 41 includes an upper wall plate 42 covering the upper side of the housing portion 23 of the shield case main body 22, and a pair of second side wall plates (covers extending downward from the left and right end portions on the front front side of the upper wall plate 42). Left wall plate 43 and cover right wall plate 44), braided contact portion 55 as a shield conductor connection portion for electrically connecting shield cover 41 and braid 8, and shield case 75 of second shield terminal unit 71 And an upper plate portion 54 which constitutes a part of the shield case contact portion 61 to be in contact. The shield cover 41 is formed, for example, by press molding.

  The portion from the position p to the position s in FIG. 9 or 10 in the front-rear direction of the shield cover 41 is the upper wall plate 42. An upper recessed portion 45 which is recessed downward is formed in the left-right direction middle portion of the front front side (the portion from the position p to the position q) of the upper wall plate 42. The upper recess 45 is located below the front left edge and the right edge of the upper wall plate 42. Since the upper depression 45 is formed on the front front side of the upper wall plate 42, the connecting portion between the front front side of the upper wall plate 42 and the cover left wall plate 43 and the front front side of the upper wall plate 42 As shown in FIG. 5, an insertion groove 46 opened downward is formed in a connection portion with the cover right wall plate 44. The structure will be described based on the upper recess 45. The connecting portion between the front front side of the upper wall plate 42 and the cover left wall plate 43, and the connection between the front front side of the upper wall plate 42 and the cover right wall plate 44 The portions are respectively raised above the upper surface of the upper recess 45, and their cross-sectional shapes are inverted U-shaped. The inside of the inverted U-shaped portion corresponds to the insertion groove 46. Hereinafter, these raised portions will be referred to as raised portions 47, respectively.

  As shown in FIG. 5, the front upper end of the front left side of the main body left wall plate 25 is inserted into the left insertion groove 46, and the upper front upper end of the main body right wall plate 26 is inserted into the right insertion groove 46. The part is inserted. Thus, the lower surface of the front left lateral middle portion of the upper wall plate 42 is positioned lower than the upper front end of the front left of the main left wall plate 25 and the upper front end of the front front of the main body right wall plate 26. Do.

  Further, as shown in FIG. 9, at the front of the upper wall plate 42, the rear end of each of the raised portions 47 is located at a position q on the rear side of the front middle of the upper wall plate 42 in the front-rear direction. . Further, at the position q, slits 49 are formed at the left edge and the right edge of the upper wall plate 42, respectively. Furthermore, a flat plate having an upper surface and a lower surface at the same height as the upper surface and the lower surface of the upper recessed portion 45 in a portion on the rear side of the position q (a portion from the position q to the position r) The part 50 is formed. Further, as shown in FIG. 6, the corner portions 50 </ b> A at the front left and right ends of the flat plate portion 50 respectively contact the pair of left and right stepped portions 32 of the shield case main body 22.

  Further, as shown in FIG. 10, the upper wall plate 42 is bent in an S-shape or a crank at a bending portion 51 formed at a position r on the middle or the rear side in the front-rear direction. Thereby, the lower surface of the rear portion 52 (a portion from the position r to the position s) of the upper wall plate 42 is positioned lower than the lower surface of the upper recessed portion 45 or the flat surface portion 50. Further, the width of the front-rear direction intermediate portion is reduced so as to correspond to the shapes of the left recess 29 and the right recess 30 of the shield case main body 22 in the rear portion 52 of the upper wall plate 42.

  In addition, the cover left wall plate 43 extends downward from the front left end of the front wall of the upper wall plate 42 to the outside (left side) of the front of the main body left wall plate 25. The right surface of the cover left wall plate 43 and the left surface of the main body left wall plate 25 are in contact with each other, and both are electrically connected. Further, the cover right wall plate 44 extends downward from the front right end of the front wall of the upper wall plate 42 to the outside (right side) of the front of the main body right wall plate 26. The left surface of the cover right wall plate 44 and the right surface of the main body right wall plate 26 are in contact with each other, and both are electrically connected.

  Further, a cover locking portion 53 is formed on the cover left wall plate 43 and the cover right wall plate 44 respectively. In the present embodiment, the left cover locking portion 53 is formed by causing a part of the right surface of the cover left wall plate 43 to project rightward, and the right cover locking portion 53 is formed on the left surface of the cover right wall plate 44. It is formed by projecting a part to the left. As shown in FIG. 5, the shield cover 41 and the shield case main body 22 are locked to each other when the cover locking portions 53 enter into the corresponding main locking portions 31.

  Further, the upper plate portion 54 constitutes a shield case contact portion 61 together with the lower plate portion 35, the left plate portion 36 and the right plate portion 37 of the shield case main body 22. The upper plate portion 54 is provided on the front end side of the upper wall plate 42. Specifically, the upper plate portion 54 extends forward from the front end side of the upper wall plate 42, as shown in FIG. The upper plate portion 54 is located at the same height as the top of each raised portion 47. Further, in the portion from the front end side of the upper recessed portion 45 to the rear end side of the upper plate portion 54, there is formed a slope which is gradually displaced upward as it goes forward. Further, the upper plate portion 54 is formed with a convex contact 62 projecting inward (downward).

  Also, the braid contact portion 55 is provided at the rear of the upper plate portion 54. Specifically, as shown in FIG. 10, the braided contact portion 55 extends upward from the rear end of the rear portion of the upper plate portion 54, and then bends rearward, and thereafter, parallel to the upper wall plate 42 rearward. It is expanding. Further, the rear portion of the braid contact portion 55 is wider than the rear portion 52 of the upper wall plate 42. Further, the rear portion of the braid contact portion 55 is curved so that the left-right direction middle portion thereof bulges upward, and has a shape that matches the curvature of the outer surface of the cable 3 fixed to the cable fixing portion 38. The braided contact portion 55 is crimped to the cable fixing portion 38 together with the end of the cable 3. As a result, the braid contact portion 55 contacts the braid 8 or the cable fixing portion 38 and is electrically connected to the braid 8.

  The method of assembling the connector 1 is as follows. First, the terminal support member 13 to which the terminals 12 to which the core wire 6 is crimped is attached is inserted into the housing portion 23 of the shield case main body 22 from above. Next, the shield cover 41 is attached to the shield case body 22 from above. Next, the end of the cable 3 in which the braid 8 is folded back and the braid contact portion 55 are crimped and fixed to the cable fixing portion 38. Next, the shield terminal unit 11 to which the cable 3 is connected in this manner is attached to the housing 91.

  In the shield terminal unit 11 in a state in which the cable 3 is connected, as shown in FIG. 4, the terminal support member 13 on which each terminal 12 is supported is a front portion of the upper recessed portion 45, the flat portion 50, and the lower wall plate 24. , And is surrounded by the front of the main body left wall 25 and the front of the main body right wall 26. Further, the end portion of each wire 5 and exposed from the braid 8 is surrounded by the rear portion 52 of the upper wall plate 42, the lower recess 28, the left recess 29 and the right recess 30. The shield case body 22 is electrically connected to the braid 8 through the cable fixing portion 38, and the shield cover 41 is electrically connected to the braid 8 through the braid contact portion 55. Further, the shield cover 41 is electrically connected to the shield case body 22 via the cover left wall plate 43 and the cover right wall plate 44.

  In the first shield terminal unit 11 of the present embodiment having the above configuration, the upper recessed portion 45 is formed in the left-right direction middle portion on the front front side of the upper wall plate 42 of the shield cover 41. With this configuration, the distance between the lower surface of the upper wall plate 42 and each of the terminals 12 accommodated in the accommodation portion 23 can be shortened. Thereby, the impedance of the shield terminal unit 11 can be lowered, and impedance matching can be easily made between the cable 3 or the mating connector.

  Further, in the shield terminal unit 11, the lower side recessed portion 27 is formed in the shield case main body 22. By this configuration, the distance between the shield case main body 22 and each of the terminals 12 can be shortened, and the impedance of the shield terminal unit 11 can be further lowered.

  Further, in the shield terminal unit 11, the rear portion 52 of the upper wall plate 42 of the shield cover 41 is lower than the front portion of the upper wall plate 42. With this configuration, the distance between the end of each wire 5 exposed from the braid 8 and the upper wall plate 42 can be shortened. Thereby, the impedance of the shield terminal unit 11 can be further lowered.

  Further, in the shield terminal unit 11, the shield case body 22 is provided with the lower recess 28, the left recess 29 and the right recess 30. With this configuration, it is possible to increase the number of places in the shield case main body 22 approaching the end portions of the respective electric wires 5 exposed from the braid 8. Thereby, the impedance of the shield terminal unit 11 can be further lowered.

  Further, in the shield terminal unit 11, the upper end portions of the front portion of the main body left wall plate 25 and the front portion of the main body right wall plate 26 in the pair of insertion grooves 46 formed in the shield cover 41. Is inserted. With this configuration, the upper ends of the front portion of the main body left wall plate 25 and the upper end of the front portion of the main body right wall plate 26 are respectively supported in the insertion groove 46 and it becomes difficult to shift in the lateral direction. Thereby, the strength of the shield case 21 is enhanced. Specifically, for example, in the shield case having a structure divided up and down into the main body and the cover like the shield case 21, the upper wall plate of the cover is not temporarily provided with the insertion groove, and the left wall plate of the main body and When each upper end surface of the right wall is simply brought into contact with or close to the flat lower surface of the upper wall of the cover, the left or right external force is applied to the upper portion of the shield case. The wall plate or the right wall plate may be inclined to the lower wall plate, and the square cross-sectional shape of the shield case may be deformed into a parallelogram or trapezoid. On the other hand, in the shield case 21 of the shield terminal unit 11 according to the embodiment of the present invention, the upper end portions of the front portion of the main body left wall plate 25 and the front portion of the main body right wall plate 26 are inside the pair of left and right insertion grooves 46 Since the above-mentioned external force is applied to the shield case 21 and deformed, the square cross-sectional shape of the shield case 21 can be prevented from being deformed.

  Further, in the shield terminal unit 11, the shield cover 41 is attachable to and detachable from the shield case main body 22, and the entire upper portion of the shield case main body 22 is opened by removing the shield cover 41 from the shield case main body 22. With this configuration, the ease of assembly of the shield terminal unit 11 can be enhanced. That is, the rear portion of the housing portion 23 has a narrowed shape because the lower recess 28, the left recess 29 and the right recess 30 are formed. Therefore, the terminal support member 13 to which the terminal 12 is attached can not be inserted into the housing portion 23 from the opening at the rear end of the shield case 21. However, in the shield terminal unit 11, by removing the shield cover 41 from the shield case main body 22, the terminal support member 13 to which the terminal 12 is attached can be easily inserted into the housing portion 23 from above the shield case main body 22. . Therefore, the shield terminal unit 11 can be easily assembled.

(Second shield terminal unit)
FIG. 11 shows the second shield terminal unit 71 in a disassembled state. FIG. 12 shows a vertical cross section of the shield terminal unit 71 viewed from the direction of arrows XII-XII in FIG. FIG. 13 shows a cross section of the shield case 75 of the shield terminal unit 71 as viewed in the direction of arrows XIII-XIII in FIG. In the second shield terminal unit 71, the same components as those of the first shield terminal unit 11 are denoted by the same reference numerals, and the description thereof will be omitted.

  As shown in FIG. 11, in the shield terminal unit 71, the terminal contact portion 72A of each terminal 72 is pin-shaped. The terminal contact portion 72A of each terminal 72 contacts the terminal contact portion 12A by being inserted into the cylindrical terminal contact portion 12A of each terminal 12 of the first shield terminal unit 11.

  Further, as shown in FIGS. 12 and 13, in the shield terminal unit 71, the dimension of the shield case main body 76 in the vertical direction is smaller than the dimension of the shield case main body 22 of the first shield terminal unit 11 in the vertical direction. The lower wall plate 77 generally approaches the lower surface of the terminal support member 13. Therefore, the lower side recess portion is not formed in the shield case main body 76. Also, a unit locking portion 78 protrudes downward from the lower surface of the lower wall plate 24.

  Further, as shown in FIG. 11, the width in the left-right direction and the width in the vertical direction of the shield case contact portion 85 are greater than the width in the left-right direction and the width in the vertical direction of the shield case contact portion 61 of the first shield terminal unit 11. Each is also small. The shield case contact portion 85 contacts the shield case contact portion 61 by being inserted into the shield case contact portion 61 of the first shield terminal unit 11.

  Further, as shown in FIG. 12, in the shield cover 83 of the shield terminal unit 71, the upper plate portion 84 is disposed at a position higher than the upper recessed portion 45 and lower than the respective raised portions 47. Further, no convex contact is provided on the lower plate 79, the left plate 80, the right plate 81 and the upper plate 84 of the shield case contact portion 85.

  The second shield terminal unit 71 having such a configuration also achieves the same function and effect as the first shield terminal unit 11.

  In the shield terminal unit 11 (71), the following configuration may be adopted as a locking mechanism for locking the shield cover to the shield case main body. That is, like the shield terminal unit 101 shown in FIG. 14, the main body left wall plate 105 of the shield case main body 103 of the shield case 102 is provided with two main body locking portions 106 separated in the front and rear direction Two cover locking portions 123 may be provided on the left wall plate 113 so as to correspond to the main body locking portions 106 respectively. In this case, two main body locking portions and two cover locking portions are similarly provided on the main body right wall plate of the shield case main body 103 and the cover right wall plate of the shield cover 111, respectively. According to this configuration, the shield cover 111 is supported by the shield case main body 103 by the engagement of the four main body engagement portions 106 and the four cover engagement portions 123. Therefore, the position of the shield cover 111 relative to the shield case main body 103. The effect of suppressing the shift is enhanced. Further, as in the shield terminal unit 101 shown in FIG. 14, each main body locking portion 106 may be shaped so as to protrude outward in the left-right direction, and each cover locking portion 123 may be formed as a hole (or a shape recessed in the left lateral direction). .

  Further, in the shield terminal unit 11 (71), the step portion 32 formed on the front portion of the shield case main body 22 (76) is brought into contact with the corner portion 50A of the flat plate portion 50 of the shield cover 41 (83). . However, like shield terminal unit 101 shown in FIG. 14, stepped portion 107 formed at the rear of main body left wall plate 105 and main body right wall plate in shield case main body 103, and upper wall plate 112 in shield cover 111. The rear end 117A of the protruding portion 117 formed on the left and right sides of the upper depression portion 115 may be brought into contact with each other. Also by this configuration, the position of the shield cover 111 in the front-rear direction with respect to the shield case main body 103 can be determined.

  Further, in the shield terminal unit 11 (71), the left recess 29 and the right recess 30 are formed such that the degree of each recess gradually increases from the front end (the position c in FIG. 7) to the rear. However, as in the case of the shield terminal unit 101 shown in FIG. 14, the left recess 108 and the right recess 109 may be formed so as to be sharply recessed rightward inward in the left-right direction at each front end. As a result, the wall plate at the rear of the shield case body 103 can be brought closer to the end of each wire 5 exposed from the braid 8.

  In each of the shield terminal units 11 and 71, the number of terminals may be two or more. Further, the connectors 1 and 2 can be used not only for video signals but also for transmission of various high frequency signals.

  Further, the present invention can be suitably modified without departing from the scope and spirit of the invention which can be read from the claims and the entire specification, and shield terminal units and connectors with such modifications are also disclosed. It is included in the technical thought.

1, 2 connector 3, 4 cable 11, 71, 101 shield terminal unit 12 terminal 13 terminal support member 21, 75, 102 shield case 22, 76, 103 shield case main body (case main body)
23 accommodation part 24, 77 lower wall board 25, 105 main body left wall board (first side wall board)
26 Main body right wall board (first side wall board)
28 Lower recess 29, 108 Left recess (horizontal recess)
30, 109 Right recess (horizontal recess)
31, 106 Body locking part (locking mechanism)
38 Cable fixing portion 41, 83, 111 Shield cover (cover)
42, 84, 112 Upper wall plate 43, 113 Cover left wall plate (second side wall plate)
44 Cover right wall plate (second side wall plate)
45, 115 Upper recessed part 46 Insertion groove 47, 117 Protrusion part 51 Bent part 52 Rear part 53, 123 Cover locking part (locking mechanism)
55 Braided contact (shielded conductor connection)

Claims (8)

A shield terminal unit connected to an end of a cable comprising a plurality of electric wires and a shield conductor surrounding the plurality of electric wires,
A plurality of terminals to which core wires of the plurality of electric wires are respectively connected;
A terminal support member supporting the plurality of terminals;
And a shield case formed of a conductive material and surrounding each of the terminals and an end of each of the wires, the part being exposed from the shield conductor.
The shield case has a case body, a cover, and a locking mechanism for locking the cover to the case body.
The case body is
A housing portion formed by the lower wall plate and the left and right pair of first side wall plates, the terminal supporting member on which the terminals are supported, and a portion which is an end portion of each wire and which is exposed from the shield conductor When,
A cable fixing portion fixing an end portion of the cable and electrically connecting the case main body and the shield conductor;
The cover is
An upper wall plate covering an upper side of the housing portion;
And a pair of second side wall plates extending downward from the left and right end portions of the upper wall plate front portion to the outside of the pair of first side wall plate front portions,
When the middle portion in the left-right direction of the front portion of the upper wall plate is depressed downward, insertion grooves opened downward are respectively formed in the connection portions between the upper wall plate and the pair of second side wall plates. A shield terminal unit characterized in that upper ends of the pair of first side wall plate front portions are respectively inserted into the insertion groove.   The connection between each of the upper wall plate and the pair of second side wall plates is raised above the upper surface of the left-right direction middle portion of the upper wall plate at the front, and the cross sectional shape is reverse U-shaped The shield terminal unit according to claim 1, characterized in that   The part of the upper wall plate is bent so that the lower surface of the rear wall of the upper wall plate is positioned lower than the lower surface of the left-right direction middle part of the front of the upper wall plate. Shield terminal unit as described.   The shield terminal unit according to any one of claims 1 to 3, wherein the cover is provided with a shield conductor connection portion contacting the shield conductor or the cable fixing portion.   The terminal support member on which the terminals are supported is surrounded by a left-right direction intermediate portion of the upper wall plate front portion, the lower wall plate front portion, and the pair of first side wall plate front portions, and is an end portion of each electric wire. The portion exposed from the shield conductor is surrounded by the upper wall plate rear portion, the lower wall plate rear portion, and the pair of first side wall plate rear portions. Shield terminal unit.   The shield terminal according to any one of claims 1 to 5, wherein a lower recess portion is formed at a rear portion of the lower wall plate so as to be recessed above the lower wall plate front portion and the lower portion of the cable fixing portion. unit.   The rear portion of each first side wall plate is formed with a lateral recess recessed inward in the left-right direction of the case body than the front portion of the first side wall plate and the side portion of the cable fixing portion. The shield terminal unit according to any one of claims 1 to 6, which is characterized.   A connector comprising the shield terminal unit according to any one of claims 1 to 7 and a housing for accommodating the shield terminal unit.

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