JP6920980B2 - Shielded terminal unit and connector - Google Patents

Description

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

For example, as a cable connector used for high-frequency signal transmission such as transmission of a video signal from a digital camera to an electronic control unit (ECU) in an automobile, a plurality of terminals to which a plurality of core wires of a multi-core shielded cable are connected, respectively. A cable connector including a metal shield case that shields these terminals and a resin housing that houses the shield case is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-45725

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

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

However, if the diameter of the shield case is reduced in order to adjust the impedance, the assembly of the cable connector may be deteriorated. For example, after supporting the terminal to which the core wire of the shielded cable is connected to the terminal support member, the terminal support member is inserted into the shield case through the opening at the rear end of the tubular shield case. The connector can be easily assembled. However, when the diameter of the shield case becomes smaller, it becomes difficult to insert the terminal support member into the shield case through the opening at the rear end of the shield case, and the assemblability deteriorates.

On the other hand, by making the shield case vertically divided into two members, for example, a main body and a cover, the assemblability of the cable connector can be improved. 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 then attaching 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 is lowered, and the shield case may be easily deformed by an external force.

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

In order to solve the above problems, the shield terminal unit of the present invention is a shield terminal unit connected to the end of a cable provided with a plurality of electric wires and a shield conductor surrounding the plurality of electric wires, and is a shield terminal unit of a plurality of electric wires. A shield formed of a plurality of terminals to which core wires are connected, a terminal support member supporting the plurality of terminals, and a conductive material, and surrounding each terminal and a portion of each electric wire 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, and the case body is formed by a lower wall plate and a pair of left and right first side wall plates. The terminal support member that supports each terminal, the accommodating portion that accommodates the end of each electric wire that is exposed from the shield conductor, and the case body and shield conductor that fix the end of the cable. The cover has an upper wall plate that covers the upper side of the accommodating portion, and a cover downward from the left and right ends of the front portion of the upper wall plate to the outside of the front portion of the pair of first side wall plates. Each has a pair of extending second side wall plates, and the left-right intermediate portion of the front portion of the upper wall plate is recessed downward so that the upper wall plate and the pair of second side wall plates are connected to each other. An insertion groove opened downward is formed, and an upper end portion of a pair of first side wall plate front portions is inserted into each of the 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 raised above the upper surface of the middle portion in the left-right direction of the front portion of the upper wall plate, respectively. It is preferable that the cross-sectional shape of the above is an inverted U shape.

Further, 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 rear portion of the upper wall plate is located below the lower surface of the middle portion in the left-right direction of the front portion of the upper wall plate. ..

Further, in the shield terminal unit of the present invention, it is preferable that the cover is provided with a shield conductor or a shield conductor connection portion that contacts 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-right 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 each electric wire. It is preferable that the end portion of the above wall plate exposed from the shield conductor is surrounded by the rear portion of the upper wall plate, the rear portion of the lower wall plate, and the rear portion of the pair of first side wall plates.

Further, in the shield terminal unit of the present invention, it is preferable that the rear portion of the lower wall plate is formed with a lower recess recessed above the front portion of the lower wall plate and the lower portion of the cable fixing portion. Further, in the shield terminal unit of the present invention, the rear portion of each first side wall plate is laterally recessed inward in the left-right direction of the case body from the front portion of the first side wall plate and the side portion of the cable fixing portion. It is preferable that the recess is formed.

Further, in order to solve the above problems, the connector of the present invention includes the shield terminal unit of the present invention and a housing for accommodating the shield terminal unit.

According to the present invention, impedance matching with a cable connected to the shield terminal unit, a mating connector, or the like can be easily achieved while ensuring ease of assembly of the shield terminal unit and strength of the shield case.

It is an external view which shows the 1st and 2nd connectors of embodiment of this invention. It is an external view which shows the 1st and 2nd shield terminal units of embodiment of this invention. It is an exploded perspective view of the 1st shield terminal unit. It is a vertical sectional view of the 1st shield terminal unit. It is sectional drawing of the shield case of the 1st shield terminal unit. It is explanatory drawing which shows a part of the shield case of the 1st shield terminal unit. It is an external view which looked at the shield case main body of the 1st shield terminal unit from above. It is an external view of the shield case main body of the 1st shield terminal unit seen from the left side. It is an external view which looked at the shield cover of the 1st shield terminal unit from above. It is the external view which looked at the shield cover of the 1st shield terminal unit from the left side. It is an exploded perspective view of the 2nd shield terminal unit. It is a vertical sectional view of the 2nd shield terminal unit. It is sectional drawing of the shield case of the 2nd shield terminal unit. It is an external view which shows the modification of the shield terminal unit of embodiment of this invention.

(1st connector, 2nd 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. When describing the directions of the connector 1 and the shield terminal unit 11, the front (F1), rear (B1), left (L1), right (R1), and top drawn in the lower right of FIGS. 1 to 10. Follow the arrows pointing in the direction of (U1) and down (D1). Further, when describing the directions with respect to the connector 2 and the shield terminal unit 71, the front (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), and left (F2), rear (B2), left Follow the arrows pointing in the directions of L2), right (R2), up (U2), and down (D2). It should be noted that these directions are provided only for convenience of explanation.

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. Cables 3 and 4 are 4-core shielded cables, respectively.

The connector 1 includes a shield terminal unit 11 shown in FIG. 2 and a housing 91 that houses the shield terminal unit 11. The housing 91 is formed in a tubular shape by 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 a unit locking portion 33, 34, which will be described later, and a retainer (not shown) mounted on the housing 91.

The connector 2 includes a shield terminal unit 71 shown in FIG. 2 and a housing 95 for accommodating the shield terminal unit 71. The housing 95 is formed in a tubular shape by 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 a unit locking portions 78 and 34, which will be described later, and a retainer (not shown) mounted on the housing 95.

When connecting the connectors 1 and 2 to each other, the fitting portion 92 formed in the front portion of the housing 91 of the connector 1 is inserted into the fitting hole 96 formed in the front portion 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 are in 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 are in contact with each other and are electrically connected to each other. Further, when the fitting portion 92 is inserted all the way into 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 a state in which the first shield terminal unit 11 is disassembled. FIG. 4 shows a vertical cross section of the shield terminal unit 11 as viewed from the direction of arrow 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 a conductive material such as brass or phosphor bronze. As shown in FIG. 4, a substantially cylindrical terminal contact portion 12A that contacts the terminal 72 of the second shield terminal unit 71 is formed on the front end side of each terminal 12, and a substantially cylindrical terminal contact portion 12A is formed on the rear end side of each terminal 12. A barrel 12B for connecting the core wire 6 of the cable 3 is formed.

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

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

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

FIG. 5 shows a cross section of the shield case 21 as seen from the direction of arrow VV in FIG. FIG. 6 shows a state in which the front side portion of the shield case 21 is viewed from the rear upper left side. FIG. 7 shows a state in which the shield case main body 22 is viewed from above, and FIG. 8 shows a state in which the shield case main body 22 is viewed from the left. The shield case main body 22 includes a terminal support member 13 on which each terminal 12 is supported, an accommodating portion 23 that accommodates an end portion of each electric wire 5 that is exposed from the braid 8, and a shield of the second shield terminal unit 71. The lower plate portion 35, the left plate portion 36, and the right plate portion 37 that form a part of the shield case contact portion 61 that comes into contact with the case 75, the end portion of the cable 3, and the shield case main body 22 and the braid 8 are fixed. It has a cable fixing portion 38 for electrically connecting the cables. The shield case main body 22 is formed by, for example, press molding.

The 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 the accommodating portion 23. The accommodating portion 23 is formed by a lower wall plate 24 and a 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 thereof is substantially U-shaped. ..

Further, in the front portion (the portion from the position a to the position c) of the lower wall plate 24, a lower recessed portion 27 is formed in the middle portion in the left-right direction. The lower recessed portion 27 extends from the front end portion to the rear end portion in the front portion of the lower wall plate 24. In the portion of the lower wall plate 24 where the lower recessed portion 27 is formed, 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 correspondingly upward. There is.

Further, a lower recess 28 is formed in the entire rear portion (a portion from the position c to the position d) of the lower wall plate 24. In the portion of the lower wall plate 24 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 upward. Further, a left recess 29 as a lateral recess is formed in the entire rear portion (a portion from the position c to the position d) of the left wall plate 25 of the main body. In the portion of the main body left wall plate 25 where the left recess 29 is formed, the left surface of the main body left wall plate 25 is recessed to the right, and the right surface of the main body left wall plate 25 is raised to the right correspondingly. Further, a right recess 30 as a lateral recess is formed in the entire rear portion (a portion from the position c to the position d) of the right wall plate 26 of the main body. In the portion of the right wall plate 26 of the main body where the right recess 30 is formed, the right surface of the right wall plate 26 of the main body is recessed to the left, and the left surface of the right wall plate 26 of the main body is raised to the left correspondingly. Further, the portion of the lower wall plate 24 where the lower recess 28 is formed is recessed above the lower portion of the cable fixing portion 38, and the portion of the main body left wall plate 25 where the left recess 29 is formed is the cable fixing portion. The portion of the right wall plate 26 of the main body where the right recess 30 is formed is recessed inward (right) from the side (left) of 38, and is inside (right) of the side (right) of the cable fixing portion 38. It is dented on the left side). Further, the degree of dent (swelling) in the lower wall plate 28 gradually increases from the front end portion (position c) in the rear portion of the lower wall plate 24 toward the rear, and is maximum in the middle portion in the front-rear direction in the rear portion of the lower wall plate 24. After that, the size gradually decreases toward the rear end portion (position d) at the rear portion of the lower wall plate 24. The degree of dent (swelling) in each of the left recess 29 and the right recess 30 also changes in the same manner (see FIG. 7). As a result, the rear portion of the accommodating portion 23 has a constricted 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, respectively. 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 on the right surface of the main body right wall plate 26. It is formed by denting a part to the left. Further, on the right side of the main body left wall plate 25, the portion corresponding to the left main body locking portion 31 protrudes to the right, and on the left surface of the main body right wall plate 26, the portion corresponding to the right main body locking portion 31 protrudes to the left. It is protruding. These protruding portions engage with the engaging recesses 16 (see FIG. 3) formed on the left and right surfaces of the terminal support member 13, respectively. As a result, the position of the terminal support member 13 in the accommodating 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 portion of the front portion of the main body left wall plate 25 as a boundary with a position b rearward from the middle in the front-rear direction. It is descending from the front side portion, and a step portion 32 is formed between these portions. Similarly, a step portion 32 is also formed at the upper end portion of the front portion of the right wall plate 26 of the main body. As shown in FIG. 6, the corner portions 50A of the shield cover 41 come into contact with these step portions 32, respectively. As a result, the position of the shield cover 41 in the front-rear direction with respect to the shield case main body 22 is determined.

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

Further, 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 accommodating portion 23. Specifically, the lower plate portion 35 extends straight forward from the front end portion of the lower wall plate 24. The left plate portion 36 extends forward to the left from the front end of the main body left wall plate 25, and then extends forward in parallel with the main body left wall plate 25. The right plate portion 37 extends forward to the right from the front end portion of the right wall plate 26 of the main body, and then extends forward in parallel with the right wall plate 26 of the main body. The distance between the left plate portion 36 and the right plate portion 37 is larger than the distance between the front portion of the main body left wall plate 25 and the front portion of the main body right wall plate 26. Further, the left end of the lower plate portion 35 and the lower end of the left plate portion 36 are connected, and the right end of the lower plate portion 35 and the lower end of the right plate portion 37 are connected. Further, each of the lower plate portion 35, the left plate portion 36, and the right plate portion 37 is formed with a convex contact 62 projecting inward.

Further, the cable fixing portion 38 is provided on the rear end side of the accommodating portion 23. Specifically, the cable fixing portion 38 is connected to the lower wall plate 24, the main body left wall plate 25, and the rear end portion of 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 back is crimped to the cable fixing portion 38. As a result, the cable fixing portion 38 and the braid 8 come into contact with each other, and the cable 3 is supported by the cable fixing portion 38.

FIG. 9 shows a state in which the shield cover 41 is viewed from above, and FIG. 10 shows a state in which the shield cover 41 is viewed from the left. The shield cover 41 includes an upper wall plate 42 that covers the upper side of the accommodating portion 23 of the shield case main body 22, and a pair of second side wall plates (covers) that extend downward from both left and right ends on the front front side of the upper wall plate 42. The left wall plate 43 and the cover right wall plate 44), the braided contact portion 55 as a shield conductor connecting portion that electrically connects the shield cover 41 and the braid 8, and the shield case 75 of the second shield terminal unit 71. It has an upper plate portion 54 that forms a part of the contact portion 61 of the shield case that comes into contact with the shield case. The shield cover 41 is formed by, for example, 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 that is recessed downward is formed in the middle portion in the left-right direction on the 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 left and right edges on the front side of the upper wall plate 42. Since the upper recessed portion 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 left wall plate 43 of the cover, 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 the connecting portion with the right wall plate 44 of the cover. Explaining this structure with reference to the upper recessed portion 45, the connection 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 raised above the upper surface of the upper recessed portion 45, and each has an inverted U-shape in cross-sectional shape. The inside of these inverted U-shaped portions corresponds to the insertion groove 46. Hereinafter, each of these raised portions will be referred to as a raised portion 47.

As shown in FIG. 5, the upper end of the front side of the main body left wall plate 25 is inserted into the left insertion groove 46, and the upper end of the front front side of the main body right wall plate 26 is inserted into the right insertion groove 46. The part is inserted. As a result, the lower surface of the middle portion in the left-right direction on the front front side of the upper wall plate 42 is located below the upper end surface of the front front side of the main body left wall plate 25 and the upper end surface of the front front side of the main body right wall plate 26. do.

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

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

Further, the cover left wall plate 43 extends downward from the left end portion on the front front side of the upper wall plate 42 to the outside (left side) of the front portion 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 right end portion on the front side front side of the upper wall plate 42 to the outside (right side) of the front portion 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 projecting a part of the right surface of the cover left wall plate 43 to the right, and the right cover locking portion 53 is 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, each cover locking portion 53 enters the corresponding main body locking portion 31, so that the shield cover 41 and the shield case main body 22 are locked to each other.

Further, the upper plate portion 54 constitutes the 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, as shown in FIG. 10, the upper plate portion 54 extends forward from the front end side of the upper wall plate 42. The upper plate portion 54 is located at the same height as the top of each raised portion 47. Further, a portion of the upper recessed portion 45 from the front end side to the rear end side of the upper plate portion 54 is formed with an inclination that gradually displaces upward as it goes forward. Further, the upper plate portion 54 is formed with a convex contact 62 that projects inward (downward).

Further, the braided contact portion 55 is provided at the rear portion 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, then bends rearward, and then rearwardly parallel to the upper wall plate 42. It is growing. Further, the rear portion of the braided contact portion 55 is wider than the rear portion 52 of the upper wall plate 42. Further, the rear portion of the braided contact portion 55 is curved so that the intermediate portion in the left-right direction 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 portion of the cable 3. As a result, the braid contact portion 55 comes into contact with the braid 8 or the cable fixing portion 38 and is electrically connected to the braid 8.

The assembly method of the connector 1 is as follows. First, the terminal support member 13 to which each terminal 12 to which the core wire 6 is crimped is inserted into the accommodating portion 23 of the shield case main body 22 from above. Next, the shield cover 41 is attached to the shield case main 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 to the cable fixing portion 38 and fixed. Next, the shield terminal unit 11 to which the cable 3 is connected in this way is attached to the housing 91.

In the shield terminal unit 11 in which the cable 3 is connected, as shown in FIG. 4, the terminal support member 13 in which each terminal 12 is supported is the upper recessed portion 45, the flat plate portion 50, and the front portion of the lower wall plate 24. , It is surrounded by the front part of the main body left wall plate 25 and the front part of the main body right wall plate 26. Further, the end portion of each electric wire 5 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. Further, the shield case main body 22 is electrically connected to the braid 8 via the cable fixing portion 38, and the shield cover 41 is electrically connected to the braid 8 via the braid contact portion 55. Further, the shield cover 41 is electrically connected to the shield case main 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, an upper recess 45 is formed in the middle portion in the left-right direction on the 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 terminal 12 accommodated in the accommodating portion 23 can be shortened. As a result, the impedance of the shield terminal unit 11 can be lowered, and the impedance can be easily matched with the cable 3 or the mating connector.

Further, in the shield terminal unit 11, a lower recess 27 is formed in the shield case main body 22. With this configuration, the distance between the shield case main body 22 and each terminal 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 lowered from the front portion of the upper wall plate 42. With this configuration, the distance between the end of each electric wire 5 exposed from the braid 8 and the upper wall plate 42 can be shortened. As a result, the impedance of the shield terminal unit 11 can be further lowered.

Further, in the shield terminal unit 11, the shield case main body 22 is provided with a lower recess 28, a left recess 29, and a right recess 30. With this configuration, it is possible to increase the number of places in the shield case main body 22 that approach the end of each electric wire 5 exposed from the braid 8. As a result, 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 of the shield case main body 22 are contained in the pair of insertion grooves 46 formed in the shield cover 41. Is inserted. With this configuration, 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 supported in the insertion groove 46, respectively, and the positions are less likely to shift in the left-right direction. As a result, the strength of the shield case 21 is increased. Specifically, for example, in a shield case having a structure in which the main body and the cover are vertically divided, such as the shield case 21, the upper wall plate of the cover is not provided with an insertion groove, and the left wall plate of the main body and the cover are not provided. If the upper end surface of each of the right wall plates is simply in contact with or close to the flat lower surface of the upper wall plate of the cover, the left side of the main body when an external force in the left or right direction is applied to the upper part of the shield case. The wall plate or right wall plate may be tilted with respect 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 of 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 a pair of left and right insertion grooves 46. Since each of them is inserted into and supported by the shield case 21, it is possible to suppress the deformation of the square cross-sectional shape of the shield case 21 when the external force is applied to the shield case 21.

Further, in the shield terminal unit 11, the shield cover 41 is removable from the shield case main body 22, and by removing the shield cover 41 from the shield case main body 22, the entire upper part of the shield case main body 22 is opened. With this configuration, the ease of assembling the shield terminal unit 11 can be improved. That is, the rear portion of the accommodating portion 23 has a constricted 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 mounted cannot be inserted into the accommodating portion 23 through 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 mounted can be easily inserted into the accommodating 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 a state in which the second shield terminal unit 71 is disassembled. FIG. 12 shows a vertical cross section of the shield terminal unit 71 as viewed from the direction of arrow XII-XII in FIG. FIG. 13 shows a cross section of the shield case 75 of the shield terminal unit 71 as viewed from 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 designated 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 has a pin shape. The terminal contact portion 72A of each terminal 72 comes into contact with the terminal contact portion 12A by being inserted into the tubular 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 vertical dimension of the shield case main body 76 is smaller than the vertical dimension of the shield case main body 22 of the first shield terminal unit 11. , The lower wall plate 77 is generally close to the lower surface of the terminal support member 13. Therefore, the shield case main body 76 is not formed with a lower recessed portion. Further, the unit locking portion 78 projects downward from the lower surface of the lower wall plate 24.

Further, as shown in FIG. 11, the horizontal width and the vertical width of the shield case contact portion 85 are larger than the horizontal width and the vertical width of the shield case contact portion 61 of the first shield terminal unit 11. Are also small. The shield case contact portion 85 comes into contact with 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 arranged at a position higher than the upper recessed portion 45 and lower than each raised portion 47. Further, the lower plate portion 79, the left plate portion 80, the right plate portion 81, and the upper plate portion 84 of the shield case contact portion 85 are not provided with convex contacts.

The second shield terminal unit 71 having such a configuration also exerts the same effect as that of 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, as in the shield terminal unit 101 shown in FIG. 14, two main body locking portions 106 separated in the front-rear direction are provided on the main body left wall plate 105 of the shield case main body 103 of the shield case 102, and the cover of the shield cover 111 is covered. The left wall plate 113 may be provided with two cover locking portions 123 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 locking the four main body locking portions 106 and the four cover locking portions 123, so that the position of the shield cover 111 with respect to the shield case main body 103 The effect of suppressing deviation is enhanced. Further, as in the shield terminal unit 101 shown in FIG. 14, each main body locking portion 106 may have a shape protruding outward in the left-right direction, and each cover locking portion 123 may have a hole (or a shape recessed outward in the left-right direction). ..

Further, the shield terminal unit 11 (71) has a configuration in which the step portion 32 formed in the front portion of the shield case main body 22 (76) and the corner portion 50A of the flat plate portion 50 of the shield cover 41 (83) are brought into contact with each other. .. However, like the shield terminal unit 101 shown in FIG. 14, the stepped portion 107 formed at the rear of each of the main body left wall plate 105 and the main body right wall plate in the shield case main body 103, and the upper wall plate 112 in the shield cover 111. The rear end 117A of the raised portion 117 formed on both the left and right sides of the upper recessed portion 115 of the above may be brought into contact with each other. Also with 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 so that the degree of each recess gradually increases from the front end portion (position c in FIG. 7) toward the rear. However, as in 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 inward at right angles in the left-right direction at their respective front end portions. As a result, the wall plate at the rear of the shield case main body 103 can be brought closer to the end of each electric wire 5 exposed from the braid 8.

Further, 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 appropriately modified within the scope of the claims and within a range not contrary to the gist or idea of the invention that can be read from the entire specification, and the shield terminal unit and the connector accompanied by such modification are also of the present invention. Included in technical ideas.

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 Body (Case Body)
23 Containment section 24, 77 Lower wall plate 25, 105 Left wall plate of the main body (first side wall plate)
26 Main body right wall plate (first side wall plate)
28 Lower recess 29, 108 Left recess (horizontal recess)
30, 109 Right concave (horizontal concave)
31, 106 Main body locking part (locking mechanism)
38 Cable fixing part 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 Raised part 51 Bent part 52 Rear part 53, 123 Cover locking part (locking mechanism)
55 Braided contact part (shield conductor connection part)

Claims (8)

A shielded terminal unit connected to the end of a cable having a plurality of electric wires and a shield conductor surrounding the plurality of electric wires.
A plurality of terminals to which the core wires of the plurality of electric wires are connected, and
A terminal support member that supports the plurality of terminals,
It is provided with a shield case formed of a conductive material and surrounding each terminal and an end portion of each electric wire 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
An accommodating portion formed by a lower wall plate and a pair of left and right first side wall plates and supporting the terminal, and an end portion of each electric wire exposed from the shield conductor. When,
It has a cable fixing part that fixes the end of the cable and electrically connects the case body and the shield conductor.
The cover is
An upper wall plate that covers the upper side of the accommodating portion and
It has a pair of second side wall plates extending downward from the left and right ends of the upper wall plate front portion on the outside of the pair of first side wall plate front portions.
An insertion groove opened downward is formed in each connecting portion between the upper wall plate and the pair of second side wall plates by denting the middle portion in the left-right direction of the front portion of the upper wall plate downward. A shield terminal unit characterized in that the upper ends of the front portion of the pair of first side wall plates are inserted into the insertion grooves. Each connecting portion of the upper wall plate and the pair of second side wall plates is raised above the upper surface of the left-right intermediate portion of the front portion of the upper wall plate, and each has an inverted U-shape in cross-sectional shape. The shield terminal unit according to claim 1, wherein the shield terminal unit has a shape. The first or second aspect of the upper wall plate is characterized in that the lower surface of the rear portion of the upper wall plate is bent so as to be located below the lower surface of the intermediate portion in the left-right direction of the front portion of the upper wall plate. Described shield terminal unit. The shield terminal unit according to any one of claims 1 to 3, wherein the cover is provided with a shield conductor or a shield conductor connection portion that comes into contact with the cable fixing portion. The terminal support member on which each of the terminals is supported is surrounded by the left-right intermediate portion of the front portion of the upper wall plate, the front portion of the lower wall plate, and the front portion of the pair of first side wall plates, and is the end portion of each of the electric wires. The portion exposed from the shield conductor is surrounded by the rear portion of the upper wall plate, the rear portion of the lower wall plate, and the rear portion of the pair of first side wall plates, according to any one of claims 1 to 4. Shield terminal unit. The shield terminal according to any one of claims 1 to 5, wherein the rear portion of the lower wall plate is formed with a lower recess recessed above the front portion of the lower wall plate and the lower portion of the cable fixing portion. unit. The rear portion of each of the first side wall plates is formed with lateral recesses recessed inward in the left-right direction of the case body from the front portion of the first side wall plate and the side portions of the cable fixing portion. The shield terminal unit according to any one of claims 1 to 6, wherein the shield terminal unit is characterized. A connector including the shield terminal unit according to any one of claims 1 to 7 and a housing for accommodating the shield terminal unit.

Images