JP2005149784A - Connector for cable connection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-pole connector preventing short-circuit between adjacent conductor wires when soldering a plurality of contacts to a plurality of conductor wires of a cable, capable of soldering with high reliability of connection. <P>SOLUTION: The plug connector P (connector for cable connection) is formed by arraying and holding a plurality of plug contacts 40 with a prescribed distance by a plug side holding member 10 made of an insulation material. Each conductor wire 51 is soldered on an upper face of a connection part 42 of the plug contact 40, and a central groove (a concavity) 13a is formed on an upper face of the plug side holding member 10 arranged between the plug contacts 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cable connection connector used for connecting a cable and a wiring board, a cable and a cable, and the like.

  Various types of connector for cable connection as described above have been conventionally used. In any case, it is necessary to connect each contact constituting the connector with the corresponding core wire of the cable. As an example of a method for connecting the contact and the cable core wire as described above, soldering is conventionally known (see, for example, Patent Document 1).

Here, the connector for cable connection disclosed in Patent Document 1 will be outlined. In this cable connecting connector, a plurality of receiving grooves are formed on the same plane in a holding member made of an insulating material for aligning and holding a plurality of contacts, and the cable connection of the contacts received and held in the receiving grooves is performed. When the core wire of the cable is placed on the upper surface of the part, the upper end positions of all the core wires are aligned on the same plane. For this reason, the bottom surface of the heater chip is brought into contact with the upper end surface of the core wire, and the core wire and the cable connecting portion of the contact corresponding to each core wire are soldered together.
Japanese Patent No. 3383222

  By the way, recently, miniaturization and multipolarization of connectors have progressed, and contacts are required to be arranged at a narrower pitch. For this reason, when soldering the contact and the core wire (the soldering area is reduced as the contact pitch is reduced), excess solder flows out to the adjacent core wire and is easily short-circuited. Reliability can be a problem.

  The present invention has been made in view of such a problem. In a multipolar connector, when soldering a plurality of contacts and a corresponding core wire of a plurality of cables, a short circuit between adjacent core wires is prevented. An object of the present invention is to provide a connector for connecting a cable that is capable of preventing and soldering with high connection reliability.

  In order to achieve such an object, according to the present invention, a plurality of contacts (for example, the plug contacts 40 in the present embodiment) are separated from each other by a holding member made of an insulating material (for example, the plug-side holding member 10 in the present embodiment). Cable connection connectors (for example, in the present embodiment), in which the core wires of the cables are soldered to the upper surfaces of the connection portions of the contact cables (for example, the cable assembly C in the present embodiment). In the plug connector P), a depression (for example, the central groove 13 in this embodiment) is formed on the upper surface of the holding member between the contacts.

  In addition, as for a hollow, it is desirable to have the length corresponding to the part to which the core wire of the connection part of a cable is soldered.

  Moreover, it is desirable that the recess is formed so as to penetrate the holding member vertically.

  Also, behind each of the recesses, with the core wire positioned on the upper surface of the cable connection portion, it protrudes upward so that the upper end position of the core wire is aligned at the same height. It is desirable that a positioning guide capable of supporting the above is formed.

  The present invention can provide a cable connector having a configuration that prevents shorting between adjacent core wires and enables soldering with high connection reliability by means for solving the above-described problems. .

  In addition, as for a hollow, it is desirable to have a length corresponding to the part to which the core wire of the connection part of a cable is soldered. With such a configuration, it is possible to effectively prevent excess solder from spreading from the soldered portion to the surroundings, and to prevent a short circuit between adjacent core wires.

  Further, it is desirable that the recess is formed so as to penetrate the holding member vertically. With such a configuration, excess solder flows into a recess penetrating up and down the holding member, so that it is possible to reliably prevent occurrence of a short circuit between adjacent core wires.

  Also, behind each of the depressions, the core wire protrudes upward so that the upper end position of the core wire is aligned at the same height with the core wire positioned on the upper surface of the cable connecting portion. It is desirable to form a positioning guide that can support both sides of the. With such a configuration, since the upper ends of all the core wires are aligned on the same plane by the positioning guide, all the core wires are heated by one heater chip and collectively soldered to the cable connection portion. Can do.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a plug connector P and a receptacle connector R that can be fitted and connected to each other, and the plug connector P constitutes a cable connection connector according to the present invention. 2 shows the plug connector P, and FIGS. 15 and 16 show the receptacle connector R. FIG. FIG. 1 shows a cross section along the arrow II in FIG. 2 and the arrow II in FIG.

  The plug connector P includes a metal lower cover 20 and an upper cover 30, an electrically insulating resin plug-side holding member 10 disposed between the covers 20 and 30, and a plug side. A plurality of plug contacts 40 fixed and held in a line in a row by the holding member 10 and a cable assembly C that is soldered to the plug contacts 40 and extends outward from the rear end.

  As shown in FIGS. 3 and 4, the plug-side holding member 10 includes a body portion 11, a front left and right protruding portion 16 a that protrudes forward on the front left and right sides of the body portion 11, and a rear side that protrudes rearward on the rear left and right. The left and right protruding portions 16b are integrally formed by resin molding or the like. Further, a flat plug protrusion 12 protruding forward is formed between the front left and right protrusions 16a, and a central protrusion 15 protruding rearward is formed between the rear left and right protrusions 16b at the center on the lower surface side. ing.

  A large number of receiving portions 14 extending in the front-rear direction are formed on the upper surface of the body portion 11 at a predetermined interval, and further, a single central groove 13 extending left and right across the receiving portion 14 (this is the scope of the claims) (Corresponding to a depression) is formed. The length of the central groove 13 in the front-rear direction has a length corresponding to a portion to which the core wire 51 of the connecting portion 42 of the plug contact 40 is soldered. However, the length of the central groove 13 is not limited to the present embodiment, and can be shorter or longer than, for example, a portion to which the core wire 51 is soldered. This section is shown in FIG. 5 as a cross-section along the arrow V-V in FIG. 4, and the groove bottom surface 13 a of the central groove 13 (depression) is located below the groove bottom surface 14 a of the receiving portion 14. However, the depth of the central groove 13 (recess) is not limited to this embodiment, and may be formed, for example, through the body portion 11 in the vertical direction. Further, a through hole 11 a having the same bottom surface as the groove bottom surface 14 a of the receiving portion 14 is formed through the body portion 11. The through hole 11a is formed to extend to the plug protrusion 12, and as shown in FIG. 6 which is a cross-section taken along VI-VI in FIG. 4, the receiving groove 12a is formed on the lower surface side of the plug protrusion 12. Is forming.

  As can be seen from this, the receiving portion 14, the through hole 11a, and the receiving groove 12a extend in the front-rear direction, thereby forming a large number of contact insertion spaces side by side in the left-right direction. The plug contacts 40 are press-fitted into the respective contact insertion spaces from the rear, the male contact portion 41 on the front end side of the plug contact 40 is held in the receiving groove 12a, and the connection portion 42 on the rear end side is received in the receiving portion 14a. Held (see, for example, FIGS. 1 and 9). Particularly, as shown in FIG. 11, the male contact portion 41 is received and held in the receiving groove 12 a of the plug projection portion 12, and the plug projection portion 12 plays a role of supporting and reinforcing the male contact portion 41.

  The plug-side holding member 10 having the above configuration (the plug-side holding member 10 in a state where the plug contact 40 is press-fitted and held) is attached on the lower cover 20 having the shape shown in FIG. 7 as shown in FIG. The lower cover 20 is formed of a rectangular flat plate-shaped lower surface portion 21 and left and right side walls 22 and a rear wall 23 which are bent and erected upward. The plug-side holding member 10 is placed between the left and right side walls 22 and the rear wall 23. At this time, the recess 22a is fitted to the side wall of the plug-side holding member 10 and serves as a positioning guide. Slot-like engagement holes 22b extending in the front-rear direction are formed on the lower surface side of the left and right side walls 22.

  The left and right rear portions of the lower surface portion 21 are notched as shown in the drawing and are bent obliquely upward to form a pair of left and right contact pieces 25. As can be seen from FIG. 8, the contact piece 25 is positioned between the central projecting portion 15 and the rear left and right projecting portions 16 b of the plug-side holding member 10, and the tip projects upward from the upper surface of the central projecting portion 15. The front surface of the lower cover 20 is open, and the plug protrusion 12 faces the open front side.

  FIG. 9 is a cross-sectional view taken along the arrow IX-IX with the plug-side holding member 10 placed on the lower cover 20 as described above, and the connecting portion of the plug contact 40 in the plug-side holding member 10 is shown in FIG. A cable assembly C is soldered onto 42. This cable assembly C is shown in FIG. 12, and is configured to be sandwiched by a pair of upper and lower sandwiching plates 55 in a state where a large number of coaxial cables 50 are aligned on the same plane.

  Each coaxial cable 50 includes a core wire 51 located at the center, an inner insulating coating layer 52 covering the outer periphery, a conductive shield layer 53 covering the outer periphery, and an outer insulating coating layer 54 positioned on the outermost periphery. (See FIG. 13B). The cable assembly C is formed by peeling the layers of the coaxial cable 50 one after another and arranging them in a plane, and sandwiching the portion where the conductive shield layer 53 is exposed from above and below by a sandwiching plate 55 made of a conductive material and joining it by solder 56. It is done. In addition, the surface of the core wire 51 located at the tip side by side in this state is subjected to a solder coating process. Further, the distal end portion of the core wire 51 is sandwiched and held by the laminate film 59 to prevent deformation, pitch deviation, and the like. However, this tip portion is cut and removed at a chain line ZZ when soldered and joined. Further, a portion where the inner insulating layer 52 is exposed is bent and molded as shown in FIG. 13A, and a U-shaped or V-shaped slack portion 52a is provided.

  In the present embodiment, the portion where the conductive shield layer 53 is exposed is sandwiched from above and below by the sandwich plate 55, but is not limited to this. For example, the portion is sandwiched only from above by the sandwich plate 55 or by the sandwich plate 55. It is also possible to pinch only from below. In the present embodiment, the core wire 51 is subjected to a solder coating process, but the present invention is not limited to this, and may be a tin plating process, for example.

  The cable assembly C having the above configuration is soldered and joined by a pulse heater as shown in FIG. 9 after the distal end portion of the core wire 51 is cut and removed at the chain line ZZ. In this joining, first, the core wire 51 exposed at the tip of the cable assembly C is placed on the connection portion 42 of the plug contact 40 attached to the plug-side holding member 10 (cross section along arrow XX). FIG.

  A concave portion 42a is formed on the upper surface of the connection portion 42 of the plug contact 40 by a coining process or the like as shown in FIG. 17A, and the core wire 51 is formed in the concave portion 42a as shown in FIG. Is placed with accurate positioning. At this time, the upper ends of the respective core wires 51 are arranged at the same height position (above the surface of the receiving portion 14) (see FIG. 10). In this embodiment, the concave portion 42a for placing the core wire 51 is formed only on the upper surface of the connection portion 42, but the present invention is not limited to this. For example, as shown in FIG. 17C, recesses 42a may be formed on the upper and lower surfaces of the connecting portion 42.

  In a state where the core wire 51 is placed on the concave portion 42 a of the contact connecting portion 42 as described above, the lower surface of the heater chip 5 of the pulse heater is pressed onto the core wire 51, and the core wire 51 is pressed by the heater chip 5. Is heated, the solder coating of the core wire 51 is melted, and the core wire 51 is soldered and joined to the connecting portion 42. The heater chip 5 has a shape and dimension that can be inserted into the central groove 13 (depression), and its lower surface 5a is a flat surface. For this reason, if the heater chip 5 is inserted into the central groove 13 (indentation), the lower surface 5a can be directly pressed onto the core wire 51, and the core wire 51 can be easily soldered together. Can do.

  With the core wire 51 at the tip end soldered to the contact connecting portion 42 in this way, the cable assembly C is attached so that the holding plate 55 is located at the rear portion of the plug-side holding member 10. That is, the sandwiching plate 55 is attached so as to cover the center protruding portion 15 of the plug-side holding member 10 placed on the lower cover 20 and the contact piece 25 of the lower cover 20, and the lower surface of the sandwich plate 55 is connected to the contact piece 25. Contact.

  Next, the upper cover 30 having the shape shown in FIG. 14 is attached thereon. The upper cover 30 is formed of a rectangular flat plate-shaped upper surface portion 31, left and right front side walls 32 that are bent and extend downward, left and right rear side walls 33, and a rear wall 34. The left and right front side walls 32 are further formed with engagement portions 32a bent inward, and the left and right rear side walls 33 are formed with engagement protrusions 33a protruding forward. Further, the left and right rear portions of the upper surface portion 31 are cut out as shown in the drawing and bent downward to form pressing protrusions 35. All of the pressing protrusions 35 have a taper surface 35a toward the rear.

  In the upper cover 30, the left and right front side walls 32 pass through the outside of the recess 22 a of the lower cover 20 and cover the lower cover 20 (and the plug-side holding member 20, the cable assembly C, and the like placed therein). Further, it is slid forward. As a result, the engaging portions 32a of the left and right front side walls 32 are engaged with the engaging portions 32a of the left and right front side walls 32 of the lower cover 20 shown in FIG. The two covers 20 and 30 are engaged by entering into the hole 22b. At the same time, the engagement protrusions 33a of the left and right rear side walls 33 are inserted into engagement holes (not shown) formed on the rear surface of the plug-side holding member 10 so that the upper cover 30 and the plug-side holding member 10 are engaged. Is done. Further, at this time, the pressing protrusion 35 rides on the holding plate 55 along the tapered surface 35a, and presses the holding plate 55 downward. As a result, the sandwiching plate 55 comes into contact with and comes into contact with the pressing protrusion 35 and reliably comes into contact with the contact piece 25 of the lower cover 20.

  The plug connector P is configured as described above. At this time, the slack portion 52a of the cable assembly C is positioned between the sandwich plate 55 and the core wire 51 in a state where the sandwich plate 55 is fixed and held in the upper and lower covers 20 and 30 as described above. For this reason, when an external force is applied to the cable assembly C, the external force is stopped at the position of the holding plate 55 and absorbed by the slack portion 52a, so that the influence of the external force on the joint portion of the core wire 51 is not exerted. Therefore, a highly reliable plug connector that does not cause poor connection at the solder joint can be obtained.

  On the other hand, the receptacle connector R is externally shown in FIGS. 15 and 16, and as shown in FIG. 1 as a cross-section along the arrow II, the receptacle-side holding member 60 made of an insulating material has a large number of conductive material receptacle contacts. 70 is press-fitted and held in alignment. The receptacle contact 70 is a tuning fork-like contact, and has a female contact portion 71 having a bifurcated shape at the front end portion and a surface mount lead 72 at the rear end portion 72.

  The receptacle-side holding member 60 has a body portion 61 in which press-fit holes 61a for press-fitting and holding the receptacle contacts 70 are formed side by side in the left-right direction, and arm portions 62 formed on the left and right of the body portion 61. Etc. are formed. A protruding portion 61b protruding forward is formed between the arm portions 62, and the press-fit hole 61a opens forward from the protruding portion 61b. For this reason, the female contact portion 71 of the receptacle contact 70 press-fitted into the press-fitting hole 61a faces forward and outward from this opening, and the lead 72 protrudes rearward. A ground member 80 is press-fitted and held in each of the left and right arm parts 62, and the ground member 80 is provided on the rear side of the arm 62 and a ground contact part 82 that projects from the inner surface of the arm part 62 toward the projecting part 61 b. And a projecting mount part 81. Note that the lower surface of the mount portion 81 is located on the same plane as the lower surface of the lead 72 of the receptacle contact 70.

  A pair of positioning projections 63 are formed on the rear lower surface of the receptacle-side holding member 60, and the receptacle connector R is mounted on the printed circuit board B as shown in FIG. At this time, the lead 72 of each receptacle contact 70 and the lower surface of the mount portion 81 are surface-mounted to the signal pattern and ground pattern of the printed circuit board B, respectively.

  The plug connector P and the receptacle connector R configured as described above can be connected by being fitted as shown by an arrow A in FIG. At this time, the plug protrusion 12 is inserted into the female contact portion 71 of the receptacle contact 70 in the receptacle connector R in a state where the male contact portion 41 of the plug contact 40 is received and held in the receiving groove 12a in the plug connector P. As a result, the female contact portion 71 sandwiches the plug protrusion portion 12 and the male contact portion 41 so that the female contact portion 71 and the male contact portion 41 come into contact with each other, and both the contacts 40 and 70 are electrically connected. At this time, the plug contact 40 is a thin linear member, but is inserted together with the plug protrusion 12 into the female contact portion 71 in a state of being supported and reinforced by the flat plug protrusion 12. There is no risk of deformation of the contact 40.

  When the connectors P and R are fitted and connected in this manner, the front left and right protrusions 16a of the plug-side holding member 10 surrounded by the upper and lower covers 20 and 30 in the plug connector P are left and right arms in the receptacle connector R. The outer surface of the upper cover 30 is in contact with and in contact with the ground contact portion 82 of the ground member 80. Here, since the mount portion 81 of the ground member 80 is surface-mounted and grounded to the ground pattern of the printed circuit board B, the upper and lower covers 20 and 30 are grounded. Further, since the holding plate 55 of the cable assembly C is held by the upper and lower covers 20 and 30 and is in contact with each other, the shield layer 53 of each cable 50 is grounded.

  The connector according to the present invention is not limited to the one having the above configuration, and can be appropriately improved as long as it does not depart from the gist of the present invention. For example, as shown in FIGS. 18 and 19, the core wire 51 is formed on the upper surface of the connection portion 42 ′ of the plug contact behind each of the central grooves 13 ′ (dents) formed in the plug-side holding member 11 ′. In the state where ′ is positioned, the core wire 51 ′ protrudes upward (from the groove bottom surface 13 ′ of the central groove 13 ′ (dent)) so that the upper end positions of the core wire 51 ′ are aligned at the same height. You may form the positioning guide G which can support both sides of '. With such a configuration, since the upper ends of all the core wire 51 'are aligned on the same plane, all the core wires 51' are heated by one heater chip and are collectively soldered to the connector connecting portion. be able to.

Sectional drawing which shows the plug connector which comprises the cable connection connector which concerns on this invention, and the receptacle connector fitted with this plug connector along the arrow II of FIG. 2, and the arrow II of FIG. is there. It is the fragmentary sectional top view and front view of this plug connector. It is the top view and front view of a plug side holding member. It is sectional drawing which cut | disconnects and shows a plug side holding member along arrow IV-IV of FIG. It is sectional drawing which cut | disconnects and shows a plug side holding member along the arrow VV of FIG. It is sectional drawing which cut | disconnects and shows a plug side holding member along the arrow VI-VI of FIG. It is the front view, front view, and side view of an upper cover. It is a top view which shows the state which mounted the plug side holding member in the upper cover. It is sectional drawing along arrow IX-IX of FIG. FIG. 10 is a cross-sectional view taken along arrow XX in FIG. 9. It is sectional drawing along arrow XI-XI of FIG. It is the top view which shows a cable assembly, a front view, and sectional drawing. It is the front view which shows the front-end | tip of a cable assembly, and each stand sectional drawing. It is the top view which shows a lower cover, a front view, and a side view. It is the top view and front view of a receptacle connector. It is the bottom view of a receptacle connector, a rear view, and a side view. It is sectional drawing which shows the state which mounted the core wire in the connection part and sectional drawing of the connection part of a plug contact. It is a top view which shows the positioning guide which concerns on the example from which this invention differs. It is sectional drawing which cut | disconnects and shows the positioning guide which concerns on the example which differs in this invention along the arrow XIX-XIX of FIG.

Explanation of symbols

C Cable assembly (cable)
P plug connector (connector for cable connection)
R Receptacle connector 10 Plug-side holding member (holding member)
13 Central groove (dent)
20 Lower cover 30 Upper cover 40 Plug contact (contact)
42 Connection part 42a Concave part (of connection part 42) 50 Coaxial cable 51 Core wire 55 Holding plate 60 Receptacle side holding member 70 Receptacle contact 80 Ground member

Claims (4)

A connector for cable connection, in which a plurality of contacts are aligned and held at predetermined intervals by a holding member made of an insulating material, and a cable core wire of each cable is soldered to the upper surface of the cable connection portion of the contact. ,
A cable connecting connector, wherein a recess is formed on the upper surface of the holding member between the contacts.   The cable connection connector according to claim 1, wherein the recess has a length corresponding to a portion of the connection portion of the cable to which the core wire is soldered.   The cable connection connector according to claim 1, wherein the recess is formed so as to penetrate the holding member vertically.   Behind each of the recesses, with the core wire positioned on the upper surface of the cable connecting portion, the upper end of the core wire protrudes upward so that it is positioned at the same height. 4. The cable connection connector according to claim 1, wherein a positioning guide capable of supporting both sides of the core wire is formed.

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