JP2018067409A - Cable and electronics - Google Patents

Abstract

The present invention simplifies the manufacturing process of a cable with noise countermeasures and reduces the cost of manufacturing the cable. A cable includes a connector terminal, a shell surrounding the connector terminal, a connection piece extending from each of the four sides of the shell, combined with each other, a signal line connected to the connector terminal, and the signal line And a shield connected to the connection piece. The shell has four surfaces that respectively cover the four sides of the connector terminal, and the connection piece extends from the four sides serving as end portions on the signal line side of the four surfaces of the shell. [Selection] Figure 6

Description

  The present invention relates to a cable and an electronic device using the cable for wiring.

  A cable used for communication radiates noise generated during the communication. Therefore, a countermeasure (noise countermeasure) for suppressing noise radiated from the cable to the outside is required.

  As a technology related to such noise countermeasures, the connector shell (core wire holding means) and the connector shell are integrated, and the braided wire (shield) covering the outer periphery of the signal wire (core wire) is held to There is known a cable connector provided with a connector arm that is connected in general and a sealing material that seals a gap between the connector shell and the connector arm (see Patent Document 1).

JP 2006-286229 A

There is a demand to further simplify the manufacturing process of a cable with noise countermeasures and to further reduce the cost of manufacturing the cable.
The present invention provides a cable and an electronic device useful for the above-described problems.

  According to one aspect of the present invention, a cable includes a connector terminal, a shell surrounding the connector terminal, a connection piece extending from each of the four sides of the shell, and a signal line connected to the connector terminal. And a shield that surrounds the signal line and is connected to the connection piece.

  According to this configuration, the connection pieces extending from each of the four sides of the shell surrounding the connector terminal are connected to the shield surrounding the signal line in a state of being combined with each other. Thereby, the clearance gap between a shell and a shield is block | closed with a connection piece, and the noise radiated | emitted outside from the signal wire | line of a cable is suppressed appropriately. Moreover, since it is not necessary to add a member for closing such a gap for noise countermeasures, the cable manufacturing process can be simplified and the cable manufacturing cost can be reduced.

In one aspect of the present invention, the shell has four surfaces that respectively cover the four sides of the connector terminal, and the connection piece is an end portion on the signal line side of the four surfaces of the shell. It may be extended from the four sides.
According to the said structure, the said clearance gap can be reliably plugged up with the connection piece extended | stretched from each edge part of the four surfaces of a shell.

In one aspect of the present invention, the shell has alternately a large surface and a small surface as the four surfaces, and the connection piece side that extends from the end of the large surface. The overlap piece may extend from the end portion, and the overlap piece may overlap the connection piece on both sides extending from the end portion of the surface having the small area.
According to the said structure, the shape which the connection piece extended | stretched from each edge part of four surfaces of a shell was combined can be maintained firmly.

In one aspect of the present invention, the shell may be a bent metal plate.
According to the said structure, a shell and a connection piece can be integrally formed from a metal plate. Further, the three-dimensional shape of the shell and the connection piece can be realized without using an adhesive or the like.

In one aspect of the present invention, at least a part of the bent portion of the shell may be bent at an acute angle.
According to the said structure, the solid shape which a shell and a connection piece comprise can be maintained firmly.

In one aspect of the present invention, the connecting piece may be wider on the side of the shell than the central portion, and a portion connected to the shield may be wider than the central portion.
According to this configuration, the periphery of a signal line (a signal line whose outer periphery is surrounded by a shield) generally having a smaller cross-sectional area than the connector terminal surrounded by the shell can be covered with the connection piece in an appropriate and attractive manner.

One aspect of the present invention includes a connector terminal, a shell surrounding the connector terminal, a connection piece extending from the shell and combined with each other, a signal line connected to the connector terminal, and the signal line. A shield connected to the connection piece, and a signal line between the end of the shield and the connector terminal may be surrounded by the connection piece.
According to this configuration, since the signal line between the end of the shield and the connector terminal is surrounded by the connection piece, noise radiated from the signal line is reliably shielded by the connection piece.
The technical idea of the present invention can also be realized by means other than a cable. For example, an electronic device in which the first circuit and the second circuit are wired with the cable according to any one of the above-described aspects can be regarded as an invention. The invention can also be understood from the aspects of the cable manufacturing method, the wiring method between the first circuit and the second circuit using the cable, and the like. Further, the above-described structure of the shell (a shell integrally including a connection piece) is also established as one invention.

The expanded view of the shell concerning a 1st example. The expanded view of the shell concerning a 2nd example. The perspective view which shows the three-dimensional shape of the shell concerning a 1st example. The perspective view which shows the three-dimensional shape of the shell concerning a 2nd example. The perspective view which decomposes | disassembles and shows the structure of a cable. The perspective view which shows the connection aspect of a shell and a cable main part. Sectional drawing of the 2nd connection surface of the shell concerning a 1st example. Sectional drawing of the 2nd connection surface of the shell concerning a 2nd example. The figure which shows the comparison of a noise measured value. FIG. 11 illustrates a structure of an electronic device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each figure is only an example for explaining this embodiment. In addition, each figure may not be consistent in shape and the like.
FIG. 1 shows a development view of the shell 10 according to the first example.
FIG. 2 shows a development view of the shell 10 according to the second example.
FIG. 3 is a perspective view showing the three-dimensional shape of the shell 10 according to the first example.
FIG. 4 is a perspective view showing the three-dimensional shape of the shell 10 according to the second example.

  The shell 10 is a metal member for enclosing a terminal (connector terminal 20, see FIG. 5) of the cable 40. The cable 40 is, for example, a USB (Universal Serial Bus) cable. Accordingly, the connector terminal 20 is, for example, a USB Type-A terminal or a USB Type-B terminal.

  The shell 10 of the first example (FIGS. 1 and 3) is a shell 10 having a shape corresponding to the connector terminal 20 of the USB Type-A, and the shell 10 of the second example (FIGS. 2 and 4) is a USB Type-B. The shell 10 has a shape corresponding to the connector terminal 20. Incidentally, FIG. 5 shows a USB Type-A terminal as an example of the connector terminal 20. The connector terminal 20 and the shell 10 surrounding the connector terminal 20 may be collectively referred to as a terminal.

  1 and 2 show the shape of the shell 10 in a state where it has undergone a cutting-out process from a metal plate as a material of the shell 10. The metal plate referred to here is, for example, a cold rolled steel plate (SPCC). The shell 10 includes a connection piece 12 in addition to a portion (hereinafter, shell main portion 11) for mainly covering the four sides of the connector terminal 20. That is, the shell main part 11 and the connection piece 12 are integrally formed. A portion for covering the connector terminal 20 may be simply called a shell, but in the present embodiment, it is called a shell main portion 11 to be separated from the connection piece 12.

  As shown in FIGS. 1 and 2, the shell main portion 11 has four continuous surfaces. The four surfaces constituting the shell main part 11 of the shell 10 of the first example are named surfaces 13a, 13b, 13c, and 13d in order from the left side of FIG. Further, the four surfaces constituting the shell main portion 11 of the shell 10 of the second example are named surfaces 13f, 13g, 13h, and 13i in order from the left side of FIG. When the connector terminal 20 is USB Type-A, the cross section of the shell 10 (shell main part 11) when the connector terminal 20 is enclosed is substantially rectangular. Therefore, in the shell main part 11 of the shell 10 of the first example, in order to surround the periphery of the connector terminal 20 of the USB Type-A, a relatively large area (surfaces 13a and 13c) and a small surface (surface 13b, 13d) are alternately arranged.

  On the other hand, when the connector terminal 20 is USB Type-B, the cross section of the shell 10 (shell main part 11) when the connector terminal 20 is enclosed is substantially square. Therefore, in the shell main portion 11 of the shell 10 of the second example, the surfaces 13f, 13g, 13h, and 13i having substantially the same area are arranged in order to surround the connector terminal 20 of the USB Type-B. Note that when the connector terminal 20 is USB Type-B, the cross section of the shell 10 (shell main part 11) when the connector terminal 20 is enclosed is strictly a square (substantially square) according to the USB terminal standard. It is known to be a hexagon. In this embodiment, regarding the shell 10 of the second example, such a strict difference in cross-sectional shape (difference between a square and a hexagon) is omitted.

  The shell main part 11 has overlapping pieces. According to FIG. 1, the shell main portion 11 of the shell 10 of the first example has an overlapping piece 13 e extending from the side end portion 13 a 2 of one surface (for example, the surface 13 a) of the surfaces 13 a and 13 d at both ends. The overlapping piece 13e is a surface having a smaller area than any of the surfaces 13a, 13b, 13c, and 13d. Moreover, according to FIG. 2, the shell main part 11 of the shell 10 of the second example has an overlapping piece 13j extending from the side end portion 13f2 of one surface (for example, the surface 13f) of the surfaces 13f and 13i at both ends. . The overlapping piece 13j is a surface having a smaller area than any of the surfaces 13f, 13g, 13h, and 13i.

  As shown in FIGS. 1 and 2, the connection piece 12 extends from the shell 10. Specifically, the connection piece 12 extends from each of the four sides of the shell main portion 11. The connection pieces 12 extend from each of the four sides that are the ends of the four surfaces of the shell main portion 11 on the signal line 31 (see FIG. 5) side. According to FIG. 1, the connection piece 12 (connection piece 12a) extends from the end portion 13a1 of the surface 13a of the shell main portion 11, and similarly, the connection piece 12 (connection piece 12b) extends from the end portion 13b1 of the surface 13b. Then, the connection piece 12 (connection piece 12c) extends from the end 13c1 of the surface 13c, and the connection piece 12 (connection piece 12d) extends from the end 13d1 of the surface 13d. The end portions 13a1, 13b1, 13c1, and 13d1 correspond to the end portions on the signal line 31 side of the four surfaces of the shell main portion 11. As can be seen from FIG. 1, the connecting pieces 12a and 12c extending from the surfaces 13a and 13c having a large area have a larger area than the connecting pieces 12b and 12d extending from the surfaces 13b and 13d having a small area, respectively.

  Further, according to FIG. 2, the connection piece 12 (connection piece 12f) extends from the end portion 13f1 of the surface 13f of the shell main portion 11, and similarly, the connection piece 12 (connection piece 12g) extends from the end portion 13g1 of the surface 13g. The connecting piece 12 (connecting piece 12h) extends from the end 13h1 of the surface 13h, and the connecting piece 12 (connecting piece 12i) extends from the end 13i1 of the surface 13i. The end portions 13f1, 13g1, 13h1, and 13i1 correspond to the end portions on the signal line 31 side of the four surfaces of the shell main portion 11. As can be seen from FIG. 2, the connecting pieces 12f, 12g, 12h, and 12i extending from the surfaces 13f, 13g, 13h, and 13i have substantially the same area.

  The connection piece 12 has a substantially trapezoidal first connection surface 14 extending from the shell main portion 11 and a second connection surface 15 extending further from the first connection surface 14 to the side away from the shell main portion 11. The second connection surface 15 is a part that is connected (contacted) to a shield 32 (see FIGS. 5 and 6) surrounding the signal line 31 as described later.

  According to FIG. 1, the connection piece 12 a includes a substantially trapezoidal first connection surface 14 a extending from the end 13 a 1 of the surface 13 a of the shell main portion 11 and a substantially rectangular shape extending further from the end 14 a 1 of the first connection surface 14 a. Second connection surface 15a. The end 13a1 of the surface 13a and the end 14a1 of the first connection surface 14a are substantially parallel, and the end 14a1 is shorter than the end 13a1. Thus, the first connection surface 14 a has a trapezoidal shape with a width that decreases as the distance from the shell main portion 11 increases. The second connection surface 15a is wider than the end portion 14a1 of the first connection surface 14a. For example, the second connection surface 15a is the width of the corresponding surface 13a of the shell main portion 11 (the length of the end portion 13a1). Or a width slightly shorter than the width. As shown in FIG. 1, the connection pieces 12b, 12c, and 12d are similarly substantially trapezoidal first connection surfaces 14b and 14c extending from the end portions 13b1, 13c1, and 13d1 of the surfaces 13b, 13c, and 13d of the shell main portion 11, respectively. , 14d and substantially rectangular second connection surfaces 15b, 15c, 15d extending further from the end portions 14b1, 14c1, 14d1 of the first connection surfaces 14b, 14c, 14d.

  Further, according to FIG. 2, the connection piece 12 f has a substantially trapezoidal first connection surface 14 f extending from the end portion 13 f 1 of the surface 13 f of the shell main portion 11 and a substantially extended portion extending from the end portion 14 f 1 of the first connection surface 14 f. A rectangular second connection surface 15f. The end 13f1 of the surface 13f and the end 14f1 of the first connection surface 14f are substantially parallel, and the end 14f1 is shorter than the end 13f1. As a result, the first connection surface 14 f has a trapezoidal shape with a width that decreases as the distance from the shell main portion 11 increases. The second connection surface 15f is wider than the end portion 14f1 of the first connection surface 14f. For example, the second connection surface 15f is the width of the corresponding surface 13f of the shell main portion 11 (the length of the end portion 13f1). Or a width slightly shorter than the width. As shown in FIG. 2, the connection pieces 12g, 12h, and 12i are also substantially trapezoidal first connection surfaces 14g and 14h extending from the end portions 13g1, 13h1, and 13i1 of the surfaces 13g, 13h, and 13i of the shell main portion 11, respectively. , 14i and substantially rectangular second connection surfaces 15g, 15h, 15i extending further from the end portions 14g1, 14h1, 14i1 of the first connection surfaces 14g, 14h, 14i.

  Thus, the connection pieces 12 (12a, 12b, 12c, 12d, 12f, 12g, 12h, 12i) are on the shell 10 side (ends 13a1, 13b1, 13c1, 13d1, 13f1, 13g1, 13h1 of the shell main portion 11). , 13i1 side) is a central portion (for example, end portions 14a1, 14b1, 14c1, 14d1, 14f1, 14g1, 14h1, first connection surfaces 14 (14a, 14b, 14c, 14d, 14f, 14g, 14h, 14i)). 14i1 is wider than the central portion, and the portion connected to the shield 32 (second connection surface 15 (15a, 15b, 15c, 15d, 15f, 15g, 15h, 15i)) is wider than the central portion.

  Further, the overlapping piece 16 extends from at least a part of the side end portion of the connection piece 12. According to FIG. 1, of the connecting pieces 12a, 12b, 12c, and 12d, both ends of the first connecting surfaces 14a and 14c of the connecting pieces 12a and 12c having a large area (an oblique side connecting the end 13a1 and the end 14a1). The overlapping piece 16 extends from an oblique side connecting the end portion 13c1 and the end portion 14c1. On the other hand, of the connection pieces 12a, 12b, 12c and 12d, the connection pieces 12b and 12d having a small area are not provided with overlapping pieces. Further, according to FIG. 2, one side end of the first connection surfaces 14f, 14g, 14h, 14i of the connection pieces 12f, 12g, 12h, 12i (an oblique side connecting the end 13f1 and the end 14f1, an end 13g1 and the slanted side that connects the end 14g1, the slanted side that connects the end 13h1 and the end 14h1, and the slanted side that connects the end 13i1 and the end 14i1). There are no overlapping pieces. The overlapping piece 16 is a surface having an area smaller than that of the first connection surface 14.

  The shell 10 of the first example is bent along each broken line shown in FIG. 1 to have a three-dimensional shape as shown in FIG. In addition, the shell 10 of the second example is bent along each broken line shown in FIG. 2 to have a three-dimensional shape as shown in FIG. That is, the shell 10 is surrounded by a space (first space S1) surrounded by four surfaces constituting the shell main portion 11 and the second connection surfaces 15 of the four connection pieces 12 respectively extending from the four surfaces. A tapered space surrounded by the first connection surfaces 14 of the four connection pieces 12 and a space having a smaller cross-sectional area than the first space S1 (second space S2). The shape has a third space S3 that connects the space S1 and the second space S2.

  The overlapping piece 13e extending from the surface 13a of the shell 10 of the first example has another surface (surface 13d) adjacent when the four surfaces constituting the shell main portion 11 are folded as shown in FIG. It is bent so as to be superimposed on the outside. Similarly, the overlapping piece 13j extending from the surface 13f of the shell 10 of the second example, when the four surfaces constituting the shell main portion 11 are folded as shown in FIG. It is bent so as to overlap the outside of the surface 13i).

  Moreover, when the four connection pieces 12 are folded as shown in FIG. 3, the overlapping piece 16 extending from the first connection surface 14 (14a, 14c) of the shell 10 of the first example is another adjacent piece. It is bent so as to overlap the outside of the first connection surface 14 (14b, 14d). That is, in the shell 10 of the first example, the overlapping piece 16 extends from the side end portions of the connection pieces 12a and 12c extending from the end portions 13a1 and 13c1 of the surfaces 13a and 13c having the large area of the shell main portion 11, The overlapping piece 16 overlaps the connecting pieces 12b and 12d on both sides extending from the end portions 13b1 and 13d1 of the surfaces 13b and 13d of the shell main portion 11 having the small area. Further, the overlapping piece 16 extending from the first connection surface 14 (14f, 14g, 14h, 14i) of the shell 10 of the second example is folded when the four connection pieces 12 are folded as shown in FIG. It is bent so as to overlap the outside of the other adjacent first connection surface 14.

By bending the overlapping pieces (13e, 13j, 16) in this way, the overlapping pieces press the other surface from the outside, and the shape of the shell 10 as shown in FIGS.
In both the first example and the second example, the second connection surfaces 15 are combined with each other in a state of being bent in a U-shape.

FIG. 5 is a perspective view of the cable 40 in an exploded state.
FIG. 6 is a perspective view showing a connection mode between the shell 10 and the cable main portion 30.
Here, the cable main portion 30 indicates a wiring portion excluding the connector terminal 20 and the shell 10 of the cable 40. In FIG. 6, illustration of the connector terminals 20 accommodated in the shell 10 is omitted.

  The cable main part 30 has, for example, three signal wires (core wires) 31 and a shield 32. Each signal line 31 is, for example, a stranded wire obtained by twisting a plurality of annealed copper wires, and is covered with a vinyl chloride resin mixture to form a vinyl insulated wire. The shield 32 is a braided wire and covers three signal wires 31 that are vinyl insulated wires. The outer periphery of the shield 32 is covered with an outer skin 33. The shield 32 is, for example, a braided wire obtained by knitting an aluminum wire into a tube shape, and is electrically connected to the ground terminal of the connector so that it is grounded in use and has a function of shielding leakage of an electric field from the signal wire 31. Have. The outer skin 33 is a vinyl insulation exterior formed by, for example, a vinyl chloride resin mixture in a tube shape, and has a function of insulating the shield 32.

  The end of the signal line 31 is electrically connected to the connector terminal 20 by soldering the stranded wire to a terminal (not shown) of the connector terminal 20 with the surrounding skin 33 and the shield 32 removed. In this state, the shell 10 is bent around the connector terminal 20, so that the shell 10 surrounds the connector terminal 20 and a part of the cable main portion 30. At the time of the bending process, the connecting pieces 12 (the first connecting surface 14 and the second connecting surface 15) combined with each other surround the entire circumference of the cable main portion 30, and in particular, the second connecting surface 15 has the surrounding outer skin 33. Is closely attached so as to surround the shield 32 that has been removed. Thus, the second connection surface 15 is electrically connected to the shield 32 (see FIG. 6). The signal line 31 is not connected to the shell 10 and is insulated. That is, the connector terminal 20 is accommodated in the first space S1 and a part of the cable main portion 30 is mainly accommodated in the third space S3 and the second space S2. Therefore, the signal line 31 between the end of the shield 32 and the connector terminal 20 is surrounded by the connection piece 12. In the end, the cable 40 is further resin-molded with polycarbonate or the like within a predetermined range from the center of the shell main part 11 to the end of the cable main part 30 (see, for example, reference numeral 30 in Patent Document 1). ), Insulated.

FIG. 7 shows a cross section of the second connection surface 15 of the shell 10 according to the first example (cross section taken along line A1-A2 in FIG. 3).
FIG. 8 shows a cross section (cross section taken along line B1-B2 in FIG. 4) of the second connection surface 15 of the shell 10 according to the second example. 7 and 8 are based on the premise that the connector terminal 20, the cable main portion 30, and the shell 10 are assembled, and the outer peripheral shape of the shield 32 in the cable main portion 30 is indicated by a two-dot chain line. 7 and 8, portions of the shell 10 other than the second connection surface 15 are omitted. However, the two-dot chain line indicating the outer peripheral shape of the shield 32 is drawn so as to be separated from the second connection surface 15 at the four corners for easy understanding, but actually, the four corners also have variations during assembly. 7 and 8 are in closer contact with the second connection surface 15 than in the respective states.

As shown in FIG. 7, in the shell 10 according to the first example, the second connection surfaces 15 (15a, 15b, 15c, 15d) bent in a U-shape are combined with each other. More specifically, the second connection surfaces 15a and 15c are combined with the second connection surfaces 15a and 15c facing each other, and the second connection surfaces 15a and 15c are combined with the second connection surfaces 15b and 15d facing each other outside the second connection surfaces 15a and 15c. Combined against The second connection surfaces 15 (15a, 15b, 15c, 15d) combined in this way surround the four sides of the shield 32, and the shield 32 is in contact with the second connection surface 15.
Further, as shown in FIG. 8, in the shell 10 according to the second example, the second connection surfaces 15 (15f, 15g, 15h, 15i) bent in a U-shape are combined with each other. More specifically, the second connection surfaces 15f and 15h are combined in a state in which the second connection surfaces 15f and 15h face each other, and the second connection surfaces 15f and 15h in a state in which the second connection surfaces 15g and 15i face each other outside the second connection surfaces 15f and 15h. Combined against The second connection surfaces 15 (15f, 15g, 15h, 15i) combined in this way surround the four directions of the shield 32, and the shield 32 is in contact with the second connection surface 15.
As shown in FIGS. 7 and 8, the shield 32 is pressed from the surrounding second connection surface 15, so that the outer peripheral shape thereof is substantially the same as the internal shape of the space formed by the second connection surface 15. It becomes.

  The shell 10 may be bent at an angle (acute angle) smaller than a right angle at least a part of the bent portion. As a specific example, FIGS. 7 and 8 show a case where a part of the second connection surface 15 is bent at an acute angle. According to FIG. 7, of the four second connection surfaces 15a, 15b, 15c, and 15d, the four corners 15b1, 15b2, 15d1, and the second connection surfaces 15b and 15d that are located on the outer side when combined are respectively provided. 15d2 is bent at an acute angle. Moreover, according to FIG. 8, two corners 15g1 and 15g2 of the second connection surface 15g located on the outermost side when the two second connection surfaces 15f, 15g, 15h, and 15i are combined are acute angles. It is bent. In this way, by bending a part of the corner generated when the second connection surface 15 is bent at an acute angle, the outer surface presses the inner surface in the relationship between the second connection surfaces 15, and FIG. , 4, 5, 6, the solid shape by the second connection surface 15 can be kept strong. Further, the shape of the shell 10 can be more firmly held by bending the overlapping pieces (13e, 13j, 16) described above at an acute angle.

  Thus, according to the present embodiment, the cable 40 includes the connector terminal 20 and the shell 10 that surrounds the connector terminal 20. The shell 10 has a connecting piece 12 extending from a shell main portion 11 mainly for enclosing the connector terminal 20 and combined with each other. The cable main portion 30 includes a signal line 31 connected to the connector terminal 20 and a shield 32 surrounding the signal line 31 and connecting to the connection piece 12. That is, since the connection pieces 12 extending from each of the four sides of the shell 10 (shell main part 11) surrounding the connector terminal 20 are connected to the shield 32 in a combined state, the shell 10 and the shield 32 This gap is almost completely closed by the connecting piece 12, and noise radiated from the signal line 31 to the outside is accurately suppressed. That is, the electromagnetic shielding effect is enhanced by the connection piece 12.

  Further, the connecting piece 12 is formed integrally with the shell 10, and another member for closing the gap as described above (for example, refer to reference numeral 23 of Patent Document 1) is further added to prevent noise. There is no need. Therefore, the manufacturing process of the cable 40 can be simplified as compared with the conventional one, and the manufacturing cost for the other member can be reduced. Further, the shell 10 is cut out integrally from the metal plate including the connection piece 12 and then bent so as to surround the connector terminal 20 and the cable main portion 30. Therefore, as compared with the case where the shell is divided into a plurality of parts, the assembly is easy, and the three-dimensional shape of the shell 10 (including the connection piece 12) can be realized without using an adhesive or the like.

  Further, as described above, the connection piece 12 is wider on the shell 10 (shell main portion 11) side than the central portion, and a portion (second connection surface 15) connected to the shield 32 is wider than the central portion. is there. Since the connecting piece 12 has such a shape, the shell 10 realizes a three-dimensional shape in which the first space S1, the third space S3, and the second space S2 described above are connected, and more generally than the connector terminal 20. The periphery of the signal line 31 and the shield 32 of the cable main portion 30 having a small cross-sectional area can be appropriately and nicely covered with the connecting piece 12.

  FIG. 9 exemplifies the comparison result of the measurement value of the radiation noise related to the cable 40. FIG. 9 shows the measured value [dBμV / m] of radiated noise in each of the states 1 to 3 with respect to the state of the shell covering the connector terminal 20. State 1 indicates a state in which a connector shell (core wire holding means) having a shape indicated by reference numeral 21 in Patent Document 1 is employed instead of the shell 10 according to the present embodiment to cover the periphery of the connector terminal 20. In the state 2, the sealing material indicated by reference numeral 23 in Patent Document 1 is further added to the state 1, and the gap between the connector shell and the cable main portion 30 is sealed with the sealing material as shown in Patent Document 1. Refers to the stopped state. State 3 refers to a state in which the shell 10 according to the present embodiment is employed and the periphery of the connector terminal 20 and the cable main portion 30 is covered. In any of the states 1 to 3, the radiation noise is measured using a USB cable corresponding to the USB 3.0 standard, and the noise frequency is 2.5 [GHz]. The standard value of the radiation noise is 70 [dBμV / m], which is a value based on the standard of CISPR (International Commission on Radio Interference) 22 Class B. Moreover, the measured value shown in FIG.

  According to FIG. 9, the measured value corresponding to the state 1 is 70 [dBμV / m], whereas the measured value corresponding to the states 2 and 3 is 60 [dBμV / m]. In comparison, in the states 2 and 3, it can be seen that the radiation noise from the cable 40 is suppressed. That is, according to the present embodiment (state 3), it can be said that the cable 40 exhibits the same electromagnetic shielding effect as in state 2 without using the sealing material employed in state 2.

  FIG. 10 simply shows an electronic device 60 in which the first circuit 50 and the second circuit 51 are wired by the cable 40. A cable 40 is wired between the first circuit 50 and the second circuit 51. In FIG. 10, naturally, the cable 40 has the connector terminal 20 and the shell 10 which surrounds the connector terminal 20 grade | etc., At the both ends as mentioned above. The shell 10 is not resin-molded because it is used inside the electronic device 60. The first circuit 50 and the second circuit 51 are circuits having ports (for example, USB ports) that can accept insertion of the connector terminals 20 (and the shell main part 11) of the cable 40.

  The first circuit 50 and the second circuit 51 are, for example, two circuits (boards or the like) disposed in a housing of one product (electronic device 60), and the cable 40 is two in the product. Used to connect circuits.

  Alternatively, the first circuit 50 and the second circuit 51 are circuits built in each of a first product (for example, a personal computer) and a second product (for example, a printer) that are independent of each other. That is, the cable 40 is also used to connect a circuit (first circuit 50) included in the first product and a circuit (second circuit 51) included in the second product. In this case, a system that includes the first circuit 50, the second circuit 51, and the cable 40 that connects them corresponds to the electronic device 60.

So far, the case where the cross section of the shell 10 is a quadrangle has been described as an example, but the present invention can be applied to a shell having a polygonal cross section other than a quadrangle. When the cross section is a pentagon or more polygon, it is desirable to assemble the shell in the same manner by extending the connecting pieces from all sides of the shell main part.
Until now, a USB cable has been exemplified as an example to which the cable 40 according to the present embodiment is applied. However, the USB cable is merely an example, and the cable 40 can be applied to various types of cables such as an STP (Shielded Twist Pair) cable and an HDMI (High-Definition Multimedia Interface) cable.

DESCRIPTION OF SYMBOLS 10 ... Shell, 11 ... Shell main part, 12, 12a, 12b, 12c, 12d, 12f, 12g, 12h, 12i ... Connection piece, 13a, 13b, 13c, 13d, 13f, 13g, 13h, 13i ... surface, 13e , 13j ... Overlapping piece, 13a1, 13b1, 13c1, 13d1, 13f1, 13g1, 13h1, 13i1 ... End, 14, 14a, 14b, 14c, 14d, 14f, 14g, 14h, 14i ... First connection surface, 14a1, 14b1, 14c1, 14d1, 14f1, 14g1, 14h1, 14i1 ... end, 15, 15a, 15b, 15c, 15d, 15f, 15g, 15h, 15i ... second connection surface, 16 ... overlapping piece, 20 ... connector terminal, 30 ... Cable main part, 31 ... Signal line, 32 ... Shield, 33 ... Outer sheath, 40 ... Cable, 50 ... First round , 51: second circuit, 60 ... electronic device, S1 ... first space, S2 ... second space, S3 ... third space

Claims (8)

A connector terminal;
A shell surrounding the connector terminal;
A connecting piece extending from each of the four sides of the shell and combined with each other;
A signal line connected to the connector terminal;
A shield that surrounds the signal line and is connected to the connection piece;
A cable comprising: The shell has four surfaces that respectively cover the four sides of the connector terminal;
The cable according to claim 1, wherein the connection piece extends from the four sides serving as end portions on the signal line side of four surfaces of the shell. The shell has alternately a large surface and a small surface as the four surfaces,
The overlapping piece extends from the side end portion of the connecting piece extending from the end portion of the surface having the large area, and the overlapping piece is the connecting piece on both sides extending from the end portion of the surface having the small area. The cable according to claim 2, wherein the cable is superimposed on the cable. A connector terminal;
A shell surrounding the connector terminal;
Connecting pieces extending from the shell and combined with each other;
A signal line connected to the connector terminal;
A shield that surrounds the signal line and is connected to the connection piece;
With
The cable characterized in that the signal line between the end of the shield and the connector terminal is surrounded by the connection piece.   The cable according to claim 1, wherein the shell is a bent metal plate.   The cable according to claim 5, wherein at least a part of the bent portion of the shell is bent at an acute angle.   The side of the shell of the said connection piece is wider than a center part, and the site | part connected with the said shield is wider than the said center part, The Claim 1 characterized by the above-mentioned. cable.   An electronic apparatus, wherein the first circuit and the second circuit are wired by the cable according to claim 1.

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