JP6174507B2 - connector - Google Patents

Description

  The present invention relates to a connector of a connector cable, and more particularly to a connector in which a connection portion with a cable tip in a housing holding a terminal is covered with a resin or the like.

  Conventionally, for example, a connector 110 as shown in FIG. 9 is known as this type of connector. The connector 110 is attached to the distal end portion of the cable 102 in which a plurality of electric wires 104 are bundled, and includes a terminal 111 connected to the distal end portion of each electric wire 104 and a synthetic resin housing 115 that holds the terminal 111. And a mold part 126 and a holder 127. The housing 115 includes a cylindrical terminal connection portion 116 in which a plurality of insertion holes 118 into which the terminals 111 are inserted are formed in the column axis direction, and an object to be connected to the connector 110 (for example, a connector portion such as an industrial device or a machine tool ( (Not shown))) and a cylindrical fitting portion 117 which fits. The mold part 126 is formed by molding, for example, a synthetic rubber material or a synthetic resin material, and covers the tip part of the cable 102 and the end part of the terminal connection part 116 on the cable 102 side. The holder 127 is fitted on the outer periphery of the housing 115 and is screwed with a screw member (not shown) provided on the connection object to maintain the coupled state between the connector 110 and the connection object.

  Various ideas have been devised for this type of connector based on the above configuration. For example, in Patent Document 1, even if the solder hangs down at one of the connection portions between the terminal and the electric wire, the sag solder adheres to the adjacent connection portion, or a short circuit occurs between the connection portions due to the drooping solder. In order to avoid this, it is disclosed that a partition wall having a cross-shaped cross section is provided at the center of the rear portion of the housing (corresponding to the end surface of the terminal connection portion 116 on the cable 102 side).

JP 2002-237348 A (paragraphs [0022] and [0028] and FIG. 1C of the drawings)

  By the way, in the conventional connector 110, the portion of the mold portion 126 that covers the portion other than the terminal connection portion 116 simply covers the cable 102 and the electric wire 104 that are easily bent with a synthetic rubber material or the like. Compared to the portion covering the connecting portion 116, it is easier to bend. Then, if the mold part 126 in the vicinity of the terminal connection part 116 bends, the terminal 111 may be stressed by compression or tension.

  Further, in the conventional connector 110, as shown in FIG. 9, the cable 102 side is longer than the terminal connection portion 116 on the cable 102 side. Since only a short coating allowance a is secured, there is a possibility that the terminal connection portion 116 may come out of the mold portion 126 when the mold portion 126 bends.

  In order to solve such a problem, for example, a cylindrical wall portion (not shown) that protrudes in the column axis direction from the end surface of the terminal connection portion 116 on the cable 102 side is formed, and the cylindrical wall portion It is conceivable to surround the rear end portion of the terminal 111 protruding from the terminal connection portion 116 and the electric wire 104 in the vicinity of the terminal connection portion 116 in the circumferential direction. In this way, since the cylindrical wall portion is resistant to bending, it is possible to suppress the bending of the mold portion 126 in the vicinity of the terminal connection portion 116, and the coating allowance a is equivalent to the amount of the cylindrical wall portion. Therefore, the terminal connection part 116 can be prevented from coming out of the mold part 126. However, when such a cylindrical wall portion is formed, the following problems occur.

  That is, when the terminal 111 is inserted into the insertion hole 118 of the terminal connection portion 116 in the manufacturing process of the connector 110, the amount of the rear end portion of the terminal 111 in the middle of insertion usually protrudes from the terminal connection portion 116. The insertion work is performed while visually confirming whether or not the terminal 111 has been inserted to the proper position. Therefore, when the rear end portion of the terminal 111 is surrounded by the cylindrical wall portion in the circumferential direction, it is difficult to visually recognize how far the terminal 111 has been inserted, and the manufacturing efficiency of the connector 110 may be reduced.

  Therefore, in order not to impair the visibility of the terminal 111 at the time of inserting the terminal 111, for example, as in the above-mentioned Patent Document 1, a partition projecting in the column axis direction from the center of the end surface on the cable 102 side of the terminal connecting portion 116 It is conceivable to provide a wall (not shown). However, even if a partition wall is provided at the center of the end face on the cable 102 side of the terminal connection portion 116, a large second moment of section cannot be obtained, so it is difficult to suppress the bending of the mold portion 126 in the vicinity of the terminal connection portion 116. It is. In addition, for example, when the sectional area of the partition wall is increased in order to obtain a large second moment of section, the amount of resin in the housing 115 increases and a new problem that sinks (dents caused by molding shrinkage) easily occur in the housing 115. Will occur.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a connector in which a connection portion between a housing and a cable is covered with a mold portion, and a mold near the housing while suppressing a decrease in manufacturing efficiency. It is an object of the present invention to provide a technique for suppressing bending of a part and removal of a housing from a mold part.

  In order to achieve the above object, according to the present invention, a protrusion for suppressing the bending of the mold portion is provided on the end face of the cable side of the housing at a position where a large second moment of section can be obtained, and the visibility of the terminal. It is made to provide in the aspect which does not inhibit.

  Specifically, the present invention is directed to a connector attached to the tip of a cable in which a plurality of electric wires are bundled.

And the said connector has the terminal connected to the front-end | tip part of each said electric wire, and the said terminal which has the column-shaped terminal connection part in which the several insertion hole into which the said terminal is inserted was formed in the column axial direction A resin housing, and a mold portion that covers the end portion of the cable and the end portion of the terminal connection portion on the cable side, and the terminal connection portion extends from the end surface on the cable side in the column axis direction. A plurality of protruding protrusions are formed at intervals along the peripheral edge portion of the end face, and from the end face on the cable side to the column axis direction so as to partition adjacent terminals inserted into the insertion holes. The protruding portion is formed with a protruding length shorter than the protruding portion, and the protruding portion includes a main body portion extending along a peripheral edge portion of the end surface on the cable side of the terminal connecting portion, and the main body portion includes In the direction of extension A rib extending from the central portion of the main body portion toward the axial center of the terminal connection portion, and is formed in a T-shaped cross section when viewed from the column axis direction. The rib is connected to the partition portion. It is characterized in that there.

  According to this configuration, since the projecting portion is formed on the peripheral edge that is far from the axis center of the terminal connecting portion (bending center of the mold portion), a large second moment of section can be obtained. The bending of the mold part can be suppressed. Further, since the coating allowance is increased by the protrusion length of the protruding portion, even if the mold portion in the vicinity of the terminal connection portion is bent, the terminal connection portion can be prevented from coming out of the mold portion. In addition, for example, when the terminal connection part is cylindrical and the number of terminals is small, the terminal connection part and the mold part slip and relatively rotate easily. Therefore, the terminal connection portion and the mold portion can be prevented from slipping and rotating relative to each other.

  Furthermore, since the protrusions are formed at intervals, when inserting the terminal into the insertion hole of the terminal connection part in the connector manufacturing process, it is determined how far the terminal has been inserted between the adjacent protrusions. It can be visually recognized. Therefore, it can suppress that the manufacturing efficiency of a connector falls.

  In addition, since a large secondary moment of section can be obtained by providing the protrusion on the peripheral edge of the cable-side end surface of the terminal connecting portion, for example, by providing the protrusion at the center of the end surface, the same cross-sectional secondary moment can be obtained. Compared with the case where it is going to obtain, the cross-sectional area of a projection part can be made small. As a result, an increase in the amount of resin in the housing can be suppressed, and occurrence of sink marks in the housing can be suppressed.

  In the “columnar terminal connecting portion” of the present invention, a plurality of insertion holes into which terminals are inserted are formed in the column axis direction, and a protrusion protruding in the column axis direction from the end surface on the cable side Any cross-sectional shape such as a circle, a rectangle, or a polygon may be used as long as it can be formed on the portion.

  In addition, the “connector” of the present invention can be applied to both a plug connector and a socket connector as long as it has the above-described configuration.

Moreover, the insulation between terminals can be improved by providing a partition part. In addition, since a larger second moment of section can be obtained by connecting the protruding portion and the partition portion, it is possible to further suppress the bending of the mold portion in the vicinity of the terminal connection portion.

Furthermore, since the protrusion is formed in a substantially T-shaped cross section with the main body portion located outside as viewed from the column axis direction, for example, a rectangular having the same width and the same height as the T-shaped cross section. The cross-sectional area can be reduced while obtaining substantially the same cross-sectional secondary moment as compared with the case where the shape-shaped protrusion is formed. Therefore, it is possible to further suppress the increase in the resin amount of the housing while suppressing the bending of the mold part, and it is possible to further suppress the occurrence of sink marks in the housing.

  Moreover, in the connector of this invention, it is preferable that the adhesive bond layer is formed between the edge part by the side of the cable of the said terminal connection part, and the said mold part which coat | covers the said edge part.

  According to this structure, the adhesiveness of the edge part by the side of the cable of a terminal connection part and a mold part improves. Combined with this and the increase in the coating allowance by providing the protrusion, it is possible to further suppress the terminal connection portion from coming out of the mold portion.

  As described above, according to the connector according to the present invention, a plurality of protrusions protruding in the column axis direction from the end surface on the cable side of the terminal connection portion are formed at intervals along the peripheral edge portion of the end surface. With a simple structure, it is possible to suppress the bending of the mold portion in the vicinity of the housing and the removal of the housing from the mold portion while suppressing a decrease in manufacturing efficiency.

It is a figure which shows the connector cable provided with the connector which concerns on embodiment of this invention. It is sectional drawing of a plug connector. It is a perspective view of a plug side connector housing. It is an end view of the cable side common to a plug side connector housing and a socket side connector housing. It is a schematic diagram for demonstrating the application range of the adhesive agent in a plug side connector housing and a cable. It is sectional drawing of a socket connector. It is a perspective view of a socket side connector housing. It is a figure which shows typically the plug side connector housing which concerns on other embodiment, The figure (a) is a side view, The figure (b) is sectional drawing of the bb line of the figure (a). is there. It is a center line half sectional view showing a conventional connector typically.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing a connector cable 1 including a plug connector 10 and a socket connector 30 according to an embodiment of the present invention. This connector cable 1 is used as a sensor / actuator connector cable for industrial equipment, machine tools, etc., and a cable 2 in which four electric wires 4 are bundled with an outer sheath 3 made of polyvinyl chloride or the like (see FIG. 2, 5 and FIG. 6), a plug connector 10 and a socket connector 30 respectively attached to both ends of the cable 2 are provided.

  FIG. 2 is a cross-sectional view of the plug connector 10. In FIG. 2, only the plug-side connector housing 15 is represented by a centerline half-sectional view for easy understanding of the structure of the plug-side connector housing 15. Further, in FIG. 2, the thickness of the adhesive layer 5 described later is exaggerated for easy understanding of the drawing.

  As shown in FIG. 2, the plug connector (connector) 10 includes a plug terminal (terminal) 11, a plug-side connector housing (housing) 15, a mold portion 26, and a plug holder 27. In the following description of the plug connector 10, the extending direction (left and right direction in FIG. 2) of the plug side connector housing 15 having columnar and cylindrical portions is referred to as “axial direction”, and the cable 2 side in the axial direction. (Right side in FIG. 2) is referred to as “base end side”, and the side opposite to the cable 2 in the axial direction (left side in FIG. 2) is referred to as “tip side”.

  The plug terminal 11 has an electrical contact portion 12 on the distal end side, and has a wire barrel 13 and an insulation barrel 14 on the proximal end side, and is formed in a pin shape as a whole. Each plug terminal 11 is connected to the distal end portion of each electric wire 4 by caulking and crimping the core wire of the electric wire 4 with the wire barrel 13 and caulking and crimping the covering portion of the electric wire 4 with the insulation barrel 14. The plug terminal 11 may be connected to the core wire of the electric wire 4 by soldering or the like.

  FIG. 3 is a perspective view of the plug-side connector housing 15. The plug-side connector housing 15 is made of synthetic resin, and has a cylindrical terminal connection portion 16 on the proximal end side and a cylindrical fitting recess 17 on the distal end side, as shown in FIGS. The terminal connection portion 16 and the fitting recess 17 are integrally formed.

  FIG. 4 is an end view of the cable 2 side common to the plug-side connector housing 15 and the socket-side connector housing 35. As shown in FIGS. 2 and 4, the cylindrical terminal connection portion 16 is formed with four insertion holes 18 extending in the axial direction and arranged in two rows and two columns. The pin-like plug terminals 11 are inserted into the four insertion holes 18 from the proximal end side toward the distal end side. When the plug terminal 11 is inserted to a proper position, the insulation barrel 14 slightly protrudes from the terminal connection portion 16 toward the proximal end side, and the electrical contact portion 12 protrudes from the terminal connection portion 16 toward the distal end side. The plug-side connector housing 15 is held so as not to be pulled out. In addition, when the plug terminal 11 is inserted into the insertion hole 18 in the manufacturing process of the plug connector 10, how much the rear end portion of the plug terminal 11 in the middle of insertion protrudes from the end surface on the base end side of the terminal connection portion 16. As a mark, an insertion operation is performed while visually confirming whether or not the plug terminal 11 has been inserted to a proper position.

  In addition, two grooves 19 are formed on the outer peripheral portion of the end portion on the proximal end side of the terminal connection portion 16 over the entire circumference. These grooves 19 are provided in order to improve the adhesion between the end portion on the proximal end side of the terminal connection portion 16 and the mold portion 26. Further, the terminal connecting portion 16 is formed with four projecting portions 20 and four partitioning portions 23 protruding from the end surface on the base end side toward the base end side in the axial direction. Details of these protrusions 20 and the partition part 23 will be described later.

  The fitting recess 17 is formed in a cylindrical shape extending coaxially with the terminal connection portion 16 from the end portion on the front end side of the terminal connection portion 16, and the electric power of the plug terminal 11 protruding from the terminal connection portion 16 toward the front end side. The contact portion 12 is surrounded in the circumferential direction. The fitting recess 17 is adapted to be fitted to a connection object (for example, a connector part (not shown) such as industrial equipment or machine tool) having a counterpart terminal (not shown) of the plug terminal 11. Specifically, the fitting recess 17 is a columnar connection object having a through-hole into which the mating terminal of the plug terminal 11 is inserted (for example, a fitting protrusion 37 of the socket-side connector housing 35 described later). It fits with a connector part having a similar structure.

  Further, an annular protrusion 25 that protrudes outward in the cylinder radial direction is formed on the outer peripheral portion of the end portion on the distal end side of the fitting concave portion 17 over the entire circumference. The annular protrusion 25 is provided to prevent the plug holder 27 from coming off.

  The mold part 26 is obtained by molding a synthetic rubber-based material or a synthetic resin-based material using a mold (not shown), and the end portion of the cable 2 (more specifically, each electric wire 4 from which the outer skin 3 is peeled off). And the distal end portion of the outer skin 3) and the end portion on the proximal end side of the terminal connection portion 16 are covered. In the present embodiment, before molding the mold portion 26, as shown by the shaded area in FIG. 5, an adhesive (for example, the end portion on the proximal end side of the outer skin 3 and the terminal connection portion 16 is used. A product name such as “Chemlock” manufactured by Road Far East Co., Ltd.) is applied to form the adhesive layer 5. That is, the adhesive layer 5 is formed between the distal end portion of the outer sheath 3 of the cable 2 and the mold portion 26, and between the proximal end portion of the terminal connection portion 16 and the mold portion 26. . Thereby, in this embodiment, the adhesion of the distal end portion of the cable 2 and the proximal end portion of the terminal connection portion 16 and the mold portion 26 can be improved.

  The plug holder 27 is made of metal and has a substantially cylindrical shape. The plug holder 27 maintains a coupled state between the plug connector 10 and the connection object by screwing a screw portion 28 formed on the tip side thereof with a nut or the like provided on the connection object. is there. As shown in FIG. 5, the plug holder 27 is fitted into the plug-side connector housing 15 before the molding portion 26 is molded. The plug holder 27 is rotatably fitted on the outer periphery of the plug-side connector housing 15 and can move by a predetermined amount in the axial direction, but the movement toward the tip side is the annular protrusion of the fitting recess 17. The movement to the base end side is regulated by the mold part 26.

  Next, the socket connector 30 will be described. FIG. 6 is a cross-sectional view of the socket connector 30. In FIG. 6, only the socket-side connector housing 35 is shown by a centerline half-sectional view for easy understanding of the structure of the socket-side connector housing 35. Further, in FIG. 6, the thickness of the adhesive layer 6 described later is exaggerated for easy understanding of the drawing.

  As shown in FIG. 6, the socket connector (connector) 30 includes a socket terminal (terminal) 31, a socket-side connector housing (housing) 35, a mold part 46, a socket holder 47, and a seal member 44. I have. In the following description of the socket connector 30, the direction in which the cylindrical socket-side connector housing 35 extends (left-right direction in FIG. 6) is referred to as “axial direction”, and the cable 2 side in the axial direction (left side in FIG. 6). Is referred to as “base end side”, and the side opposite to the cable 2 in the axial direction (right side in FIG. 6) is referred to as “tip side”.

  The socket terminal 31 has an electrical contact portion 32 formed in a cylindrical shape having a slit on the distal end side, and has a wire barrel 33 and an insulation barrel 34 on the proximal end side, and is formed in a pin shape as a whole. ing. As with the plug terminal 11, each socket terminal 31 is crimped and crimped to the core of the electric wire 4 by the wire barrel 33 and is crimped and crimped to the covering portion of the electric wire 4 by the insulation barrel 34. It is connected to the.

  FIG. 7 is a perspective view of the socket-side connector housing 35. The socket-side connector housing 35 is made of synthetic resin, and has a columnar terminal connection portion 36 on the proximal end side and a columnar fitting convex portion 37 on the distal end side, as shown in FIGS. The terminal connection part 36 and the fitting convex part 37 are integrally formed.

  As shown in FIGS. 4 and 6, the cylindrical terminal connection portion 36 has four insertion holes 38 extending in the axial direction and arranged in two rows and two columns. Pin-shaped socket terminals 31 are inserted into the four insertion holes 38 from the base end side toward the tip end side. When the socket terminal 31 is inserted to a proper position, the insulation barrel 34 protrudes slightly from the terminal connection portion 36 toward the proximal end side, and the electrical contact portion 32 protrudes from the terminal connection portion 36 toward the distal end side. The socket-side connector housing 35 is held so as not to be pulled out. As with the plug connector 10, the socket connector 31 also has a socket terminal 31 connected to the socket connector 31 as a mark, indicating how much the rear end portion of the socket terminal 31 in the middle of insertion protrudes from the end surface on the base end side of the terminal connection portion 36. The insertion work is performed while visually confirming whether or not it has been inserted to the proper position.

  Further, in order to improve the adhesion between the end portion on the base end side of the terminal connection portion 36 and the mold portion 46, two grooves 39 are formed on the outer peripheral portion of the end portion on the base end side of the terminal connection portion 36. It is formed over. Further, the terminal connection portion 36 is formed with four projecting portions 40 and four partition portions 43 that protrude from the end surface on the base end side toward the axial base end side. Details of the protrusion 40 and the partition 43 will be described later.

  On the other hand, an annular protrusion 45 protruding outward in the radial direction is formed on the entire outer periphery of the end portion on the tip end side of the terminal connection portion 36. The annular protrusion 45 serves to hold the seal member 44 while preventing the socket holder 47 from coming off.

  The fitting convex portion 37 extends from the end of the terminal connection portion 36 on the tip end side thereof and is coaxial with the terminal connection portion 36 and is formed in a columnar shape having a smaller diameter than the terminal connection portion 36. The fitting convex portion 37 is adapted to fit with a connection object (not shown) having a counterpart terminal (not shown) of the socket terminal 31. Specifically, the fitting convex portion 37 is a cylindrical connection object (for example, a connector having the same structure as the fitting concave portion 17 of the plug-side connector housing 15) surrounding the counterpart terminal of the socket terminal 31 in the circumferential direction. Part).

  The fitting convex portion 37 is formed with four through holes 48 that are continuous with the four insertion holes 38 of the terminal connection portion 36, and the electrical contact portion 32 that protrudes from the terminal connection portion 36 toward the distal end side passes through the fitting convex portion 37. It fits in the hole 48. Since the electrical contact part 32 is formed in the cylinder shape which has a slit, the electrical contact part (not shown) of the other party terminal which entered the through-hole 48, for example from the front end side is received.

  The mold part 46 is obtained by molding a synthetic rubber-based material or a synthetic resin-based material using a mold. The mold part 46 is a tip part of the cable 2 (more specifically, a covering part and an outer skin of each electric wire 4 from which the outer skin 3 is peeled off). 3) and the end of the terminal connecting portion 36 on the base end side. As shown in FIG. 6, in the socket connector 30, similarly to the plug connector 10, the end of the outer cover 3 of the cable 2 and the mold portion 46 and the end of the terminal connection portion 36 on the proximal end side are also provided. An adhesive layer 6 is formed between the part and the mold part 46.

  The socket holder 47 is made of metal and is formed in a cylindrical shape. The socket holder 47 has a threaded portion (not shown) formed on the inner peripheral surface thereof screwed with a screw sleeve or the like provided on the connection object, thereby coupling the socket connector 30 and the connection object. The state is maintained. The socket holder 47 is fitted into the socket-side connector housing 35 before the molding part 46 is molded. The socket holder 47 is rotatably fitted on the outer periphery of the socket-side connector housing 35 and is movable in the axial direction by a predetermined amount. However, the movement toward the tip side is an annular protrusion of the terminal connection portion 36. The movement to the base end side is regulated by the mold part 46 while being regulated by the mold 45.

  The seal member 44 is formed in a ring shape, is fitted into the cylindrical fitting convex portion 37 from the tip side, and is held by the socket-side connector housing 35 by hitting the tip side surface of the annular projection 45. ing. By providing such a seal member 44, when the columnar fitting convex portion 37 and the cylindrical connection object are fitted together, the tip of the cylindrical connection object extends over the entire circumference with the seal member 44. Because it comes into contact, the entry of water from the outside is suppressed.

  Prior to the description of the protrusions 20 and 40 and the partition portions 23 and 43 formed on the plug-side and socket-side connector housings 15 and 35, the conventional connector 110 will be described in order to help understanding of the present invention. In the following description of the conventional connector 110, the extending direction of the housing 115 (left-right direction in FIG. 9) is referred to as “axial direction”, and the cable 102 side (right side in FIG. 9) in the axial direction is referred to as “proximal end side”. The side opposite to the cable 102 in the axial direction (the left side in FIG. 9) is referred to as the “tip side”.

  The connector 110 illustrated in FIG. 9 is configured in substantially the same manner as the plug connector 10 of the present embodiment, except that the protruding portion 20 and the partition portion 23 are not provided. That is, the connector 110 is attached to the distal end portion of the cable 102 in which a plurality of electric wires 104 are bundled, and has a terminal 111 connected to the distal end portion of each electric wire 104 and a synthetic resin housing 115 that holds the terminal 111. And a mold part 126, and a holder 127 that maintains a coupling state between the connector 110 and a connection object (not shown). The housing 115 has a cylindrical terminal connection portion 116 in which a plurality of insertion holes 118 into which the terminals 111 are inserted are formed in the axial direction, and a cylindrical fitting portion 117. The mold part 126 is formed by molding, for example, a synthetic rubber material or a synthetic resin material, and covers the distal end portion of the cable 102 and the proximal end portion of the terminal connection portion 116.

  In such a conventional connector 110, the portion of the mold portion 126 other than the terminal connection portion 116 covers the bendable cable 102 and the electric wire 104 with a synthetic rubber material or a synthetic resin material. Therefore, it is easier to bend than the portion covering the terminal connecting portion 116. Then, when the mold part 126 in the vicinity of the end part on the base end side of the terminal connection part 116 is bent, for example, the mold part 126 compresses or pulls the terminal 111 directly or via the electric wire 104, thereby causing the terminal 111 may be stressed. Moreover, in the conventional connector 110, as shown in FIG. 9, the cable 102 side is longer than the terminal connection portion 116 on the cable 102 side. Since only the short coating allowance a is secured, if the mold part 126 is bent, the terminal connection part 116 may come out of the mold part 126.

  In order to solve such a problem, for example, a cylindrical wall portion (not shown) protruding from the end face on the cable 102 side of the terminal connection portion 116 toward the axial base end side is formed, and such a cylindrical wall is formed. It is conceivable to surround the electric wire 104 near the rear end portion of the terminal 111 protruding from the terminal connection portion 116 and the terminal connection portion 116 in the circumferential direction. In this way, since the cylindrical wall portion is resistant to bending, it is possible to suppress the bending of the mold portion 126 in the vicinity of the end portion on the base end side of the terminal connection portion 116, and the cylindrical wall portion. Since the coating allowance a is increased by the amount of the portion, it is possible to suppress the terminal connection portion 116 from coming out of the mold portion 126.

  However, when the plug terminal 11 is inserted into the insertion hole 18, as described above, how much the rear end portion of the plug terminal 11 in the middle of insertion protrudes from the end surface on the base end side of the terminal connection portion 16, as a mark. When the insertion operation is performed while visually confirming whether or not the plug terminal 11 has been inserted to the proper position, when the rear end of the plug terminal 11 is surrounded in the circumferential direction by the cylindrical wall portion, how far the plug terminal 11 is located. It may be difficult to visually recognize whether the plug connector 10 has been inserted, and the manufacturing efficiency of the plug connector 10 may be reduced. The same applies to the socket connector 30.

  Therefore, in the present embodiment, as described above, the protrusion 20 and the partition 23 are formed in the plug-side connector housing 15, and the protrusion 40 and the partition 43 are formed in the socket-side connector housing 35. The plug-side connector housing 15 and the socket-side connector housing 35 basically have the same configuration with respect to the end portions on the base end side of the terminal connection portions 16 and 36, the protruding portions 20 and 40, and the partition portions 23 and 43. Therefore, the plug-side connector housing 15 will be described below as a representative of both. With regard to the socket-side connector housing 35, the constituent elements having the same names as the plug-side connector housing 15 are parenthesized with the reference numerals of the corresponding constituent elements, and the constituent elements having names different from the plug-side connector housing 15 are corresponding structures. Write the element name and sign in parentheses. This indicates that the present invention can be applied to both the plug connector 10 and the socket connector 30.

  As shown in FIGS. 3 (7) and 4, the protrusion 20 (40) is pivoted from the proximal end surface of the terminal connecting portion 16 (36) of the plug-side connector housing 15 (socket-side connector housing 35). It protrudes to the direction base end side, and four are formed at equal intervals along the peripheral edge portion of the end face on the base end side. Thus, a straight line A connecting the protruding portions 20 (40) facing each other across the axis center O of the terminal connecting portion 16 (36) is an insertion hole facing each other across the axis center O of the terminal connecting portion 16 (36). It is shifted by 45 ° from the straight line B connecting 18 (38). Thus, interference between the projection 20 (40) and the insertion hole 18 (38) can be avoided, and the projection 20 (when the plug terminal 11 (socket terminal 31) is inserted into the insertion hole 18 (38). 40) does not become an obstacle.

  Each protrusion 20 (40) includes a main body 21 (41) having a substantially rectangular cross section extending along the peripheral edge of the end face on the base end side of the terminal connection 16 (36), and the main body 21 (41). A rib 22 (42) having a rectangular cross section extending from the central portion of the main body portion 21 (41) in the extending direction toward the axial center O of the terminal connecting portion 16 (36) (inward in the radial direction). It is formed in a substantially T shape when viewed from the axial direction.

  Further, the four partition portions 23 (43) are terminal connection portions so as to partition the insulation barrels 14 (34) of the adjacent plug terminals 11 (socket terminals 31) inserted into the insertion holes 18 (38). It protrudes from the end face on the base end side of 16 (36) to the base end side in the axial direction. In more detail, each partition part 23 (43) is formed in the cross-sectional arc shape which curves toward the axial center O of the terminal connection part 16 (36) seeing from an axial direction. Thus, each partition 23 (43) is connected to the ribs 22 (42) of the adjacent protrusions 20 (40) at both ends, and the central portion thereof is viewed from the axial direction. , And is formed so as to circumscribe the insertion hole 18 (38) located between the adjacent protrusions 20 (40).

  Here, the cross-sectional secondary moment, which is an amount representing the difficulty of deformation of the object with respect to the bending moment, is related to the bending of the mold portion 26 (46) in the vicinity of the proximal end of the terminal connection portion 16 (36). It is proportional to the square of the distance from the center of bending (coincident with the axis center O) to the protrusion 20 (40). In this regard, in the present embodiment, since the protrusion 20 (40) is formed at the peripheral edge that is far from the axis center O, a large second moment of section can be obtained. Thereby, the bending of the mold part 26 (46) in the vicinity of the end part on the base end side of the terminal connection part 16 (36) can be suppressed.

  In addition, since the covering margin increases by the protrusion length of the protrusion 20 (40) by providing the protrusion 20 (40), the mold near the base end side of the terminal connection portion 16 (36) is assumed. Even when the portion 26 (46) is bent, the terminal connection portion 16 (36) can be prevented from coming out of the mold portion 26 (46). Furthermore, the coating allowance is increased, and the adhesive layer 5 (6) is formed between the proximal end of the terminal connection portion 16 (36) and the mold portion 26 (46) as described above. In combination, the terminal connection portion 16 (36) can be further prevented from coming out of the mold portion 26 (46).

  In addition, in the cylindrical terminal connection portion 16 (36) as in the present embodiment, if the number of plug terminals 11 (socket terminals 31) is small, the terminal connection portion 16 (36) and the mold portion 26 ( In this embodiment, the protrusion 20 (40) becomes a resistance against the slip, so that the terminal connection portion 16 (36) and the mold portion 26 (46) are connected to each other. Slipping and relative rotation can be suppressed.

  Further, since the protrusions 20 (40) are formed at intervals, the plug terminal 11 (socket terminal 31) is inserted into the terminal connection part 16 (36) in the manufacturing process of the plug connector 10 (socket connector 30). When inserting into the hole 18 (38), it is possible to visually recognize how far the plug terminal 11 (socket terminal 31) has been inserted from between the adjacent protrusion 20 (40) and protrusion 20 (40). Therefore, it can suppress that the manufacturing efficiency of the plug connector 10 (socket connector 30) falls.

  In addition, since the insulation barrels 14 (34) of the plug terminal 11 (socket terminal 31) are partitioned by the partitioning portion 23 (43), the mold in the vicinity of the base end side end portion of the terminal connecting portion 16 (36) is assumed. Even when the portion 26 (46) is bent, the contact between the adjacent plug terminals 11 (socket terminals 31) can be suppressed, so that the insulation can be improved. Furthermore, since a larger second moment of section is obtained by connecting the projection 20 (40) and the partition 23 (43), in the vicinity of the proximal end of the terminal connection 16 (36). The bending of the mold part 26 (46) can be further suppressed.

  In addition to the above, the plug connector 10 (socket connector 30) of the present embodiment has the following advantages.

  First, as described above, in the present embodiment, since the projecting portion 20 (40) is provided on the peripheral edge portion of the end surface on the proximal end side of the terminal connecting portion 16 (36), a large second moment of section can be obtained. For example, the protrusion 20 (40) is provided at the center of the end face on the base end side of the terminal connection portion 16 (36), so that the protrusion 20 (40) is compared with the case where the same moment of inertia is obtained. The cross-sectional area can be reduced.

  In addition, since the protrusion 20 (40) is formed in a substantially T-shaped cross section when viewed from the axial direction, for example, it has the same width as the length of the main body 21 (41) in the circumferential direction, and Compared with the case where a rectangular projection having the same height as the length of the projection 20 (40) on the straight line A is formed, the sectional area can be reduced while obtaining substantially the same sectional second moment. it can.

  Accordingly, the plug connector 10 (socket connector 30) of the present embodiment can suppress not only the above-described advantages but also an increase in the resin amount of the plug-side connector housing 15 (socket-side connector housing 35), Another advantage is that sinking can be suppressed in the plug-side connector housing 15 (socket-side connector housing 35).

(Other embodiments)
The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  In the above embodiment, the present invention is applied to the plug connector 10 and the socket connector 30 having the columnar terminal connection portions 16 and 36. However, the present invention is not limited to this, and the terminal connection portions 16 and 36 having a rectangular column shape or a polygonal column shape, for example. The present invention may be applied to the plug connector 10 and the socket connector 30 having the above. For example, the present invention is applied to the terminal connection portion 16 having a cross-sectional shape having ribs 49 as shown in FIG. 8B, and a part of the terminal connection portion 16 is configured as shown in FIG. A protrusion 50 that protrudes from the end surface on the proximal end side of the rib 49 toward the proximal end side in the axial direction may be formed.

  Furthermore, in the said embodiment, although the four projection parts 20 and 40 were formed, not only this but 5 or more projection parts 20 and 40 may be formed if visibility is not inhibited, for example. If the bending can be suppressed, three or less protrusions 20 and 40 may be formed.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  According to the present invention, it is possible to suppress the bending of the mold portion in the vicinity of the housing and the removal of the housing from the mold portion while suppressing a decrease in manufacturing efficiency. Therefore, the connector in which the connection portion between the housing and the cable is covered with the mold portion It is extremely beneficial to apply to.

2 Cable 4 Electric wire 5 Adhesive layer 6 Adhesive layer 10 Plug connector (connector)
11 Plug terminal (terminal)
15 Plug-side connector housing (housing)
16 Terminal connection part 18 Insertion hole 20 Protrusion part 21 Main part 22 Rib 23 Partition part 26 Mold part 30 Socket connector (connector)
31 Socket terminal (terminal)
35 Socket side connector housing (housing)
36 Terminal connection part 38 Insertion hole 40 Projection part 41 Main body part 42 Rib 43 Partition part 46 Mold part

Claims (2)

A connector attached to the tip of a cable in which a plurality of electric wires are bundled,
A terminal connected to the tip of each of the wires;
A plurality of insertion holes into which the terminals are inserted have a columnar terminal connection portion formed in the column axis direction, and a resin housing for holding the terminals;
A mold portion that covers the end portion of the cable and the end portion of the terminal connection portion on the cable side;
With
The terminal connection part has a plurality of protrusions protruding from the end face on the cable side in the column axis direction at intervals along the peripheral edge of the end face, and adjacent to each other inserted into the insertion hole. The partition part protruding in the column axis direction from the end surface on the cable side is formed with a projecting length shorter than the protrusion part so as to partition the matching terminals.
The projecting portion extends along a peripheral portion of the end surface of the terminal connecting portion on the cable side, and extends from a central portion of the main body portion in a direction in which the main body portion extends toward an axial center of the terminal connecting portion. A connector having a rib, formed in a T-shaped cross section when viewed from the column axis direction, and connected to the partition portion . The connector according to claim 1 ,
A connector, wherein an adhesive layer is formed between an end portion on the cable side of the terminal connection portion and the mold portion covering the end portion.

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