JP4320296B2 - Wire pressure welding type connector - Google Patents

Description

  The present invention includes a housing, a pressure contact cover coupled to the housing, a plurality of contacts held by the housing, and a plurality of electric wires connected to the contacts, and the pressure contact cover is coupled to the housing. The present invention relates to an electric wire pressure contact type connector configured such that an electric wire pressed by a pressure contact cover is pressed into a contact pressure contact groove.

  As a method for connecting an electric wire to a contact in a conventional connector, there is known a method in which an electric wire is pressed into a press-contact groove formed in a terminal portion of the contact in addition to soldering the core of the electric wire to the contact. Here, the press contact is to press the electric wire against the press contact groove, thereby tearing the insulating coating of the electric wire at the inner edge of the press contact groove and bringing the exposed core wire into contact with the press contact groove. Such pressure welding has an advantage that the manufacturing process can be greatly reduced because the connection process between the electric wire and the contact is simple.

On the other hand, since the wire is fixed and held at the contact portion between the insulation coating and the pressure contact groove that is torn during pressure welding, if a small-diameter wire is used with the miniaturization of the connector as in recent years, insulation is required. Since the coating is thin, the holding strength of the electric wire is lowered, and there is a problem that the electric wire is easily detached from the contact. For this reason, the small-diameter electric wire attached to the contact by pressure contact needs to be firmly held (clamped) between the housing and the pressure contact cover. In addition, as shown in the patent document below, there is also known one having an electric wire holding portion for holding an electric wire connected in a pressure contact groove on a contact.
Japanese Utility Model Publication No. 2-57563

  However, in the conventional wire pressure contact type connector, since the pressure contact cover and the housing are only joined at both ends so as to sandwich all the wires therebetween, the pressure contact cover after being joined to the housing is used. The intermediate portion in the width direction sometimes floated from the housing. If the intermediate part in the width direction of the pressure contact cover is lifted from the housing in this way, the holding (holding) force of the wire by the housing and the pressure contact cover will be weakened, and when an extremely fine wire with a very small diameter is used In the case where the electric wire is used in a movable part such as a hinge, there is a possibility that the electric wire may fall out of the contact. In addition, in the configuration in which the wire holding part that holds the wire pressed against the contact is separately provided on the contact, the processing man-hours increase and the cost increases, and the connector size is small for a narrow-pitch connector with a small distance between contacts. Due to this limitation, it may be difficult to provide the electric wire holding portion for each contact.

  The present invention has been made in view of such a problem, and even though it is an inexpensive configuration, even if the electric wire is a very fine type or used in a movable part such as a hinge, it is possible to remove the contact. It is an object of the present invention to provide a wire pressure contact type connector having a configuration that can reliably prevent the wire from falling off.

An electric wire pressure welding connector according to the present invention includes a housing made of an electrically insulating material, a plurality of contacts made of a conductive material arranged in the width direction of the housing, and an electrically insulating material coupled to the housing. It has a pressure contact cover and a plurality of electric wires that are connected to the terminal portions of each contact and are arranged between the housing and the pressure contact cover and arranged in the width direction of the housing, and the pressure contact cover is coupled to the housing In this case, in the wire pressure contact type connector (for example, the plug-type connector 10 in the embodiment) in which each electric wire pressed against the pressure contact cover is pressure connected to the pressure contact groove formed in the terminal portion of the contact, the wire is pressed against the housing. When the cover is joined, a plurality of press-fitting provided extending from the intermediate portion in the width direction of one member of the housing and the press-contact cover The raised portion is press-fitted into a plurality of press-fitting holes provided in the widthwise intermediate portion of the other member, and the one member is substantially at the center of the region sandwiched between two press-fitting projections of the plurality of press-fitting projections. The space holding projection is formed in the part, and the recess is constituted by the space holding projection and the press-fitting projection, the space holding projection is in contact with the other member, and the space portion is formed by closing the open end side of the recess, The electric wire is configured to be held in the space and extend into the pressure contact groove. Further , a rear side of one member may further include a pressing protrusion that protrudes toward the electric wire side from the bottom surface of the recess, and the electric wire may be pressed by the pressing protrusion.

In the wire pressure contact type connector according to the present invention, when the pressure contact cover is coupled to the housing, the wire is pressed by the pressure contact cover and pressed into the pressure contact groove formed in the terminal portion of the contact. When the press-contact cover is joined to the press-fit projection, the press-fit projection provided to extend from the intermediate portion in the width direction of the member on one side of the housing and the press-fit cover is inserted into the press-fit hole provided in the intermediate portion in the width direction of the other member. Further, one member has a space holding protrusion at a substantially central portion of a region sandwiched between two of the plurality of press fitting protrusions, and a recess is formed by the space holding protrusion and the press fitting protrusion. and which, in contact space holding projections to the other member to form a space by closing the open end of the recess, wires are configured to extend held in the space portion to the pressure contact groove . For this reason, the intermediate portion in the width direction of the press-contact cover after being joined to the housing does not float from the intermediate portion in the width direction of the housing, and the electric wire press-connected in the press-contact groove formed in the terminal portion of the contact Can be firmly held (clamped) between the cable and the pressure cover, so that even if the wire is a very thin type or used in a movable part such as a hinge, the wire from the contact It is possible to reliably prevent the dropout. Furthermore, since the press-fitting protrusion and the press-fitting groove are provided in the housing and the press-contact cover that are relatively easy to mold, the manufacturing process can be simplified and the cost can be reduced.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 15 show a plug-type connector 10 configured as an electric wire pressure contact connector according to an embodiment of the present invention, and includes a housing 20 and a plurality of contacts 40 provided side by side in the width direction of the housing 20. A pressure contact cover 30 coupled to the housing 20, and a plurality of electric wires 50 connected to each contact 40 and provided side by side in the width direction of the housing 20 while being sandwiched between the housing 20 and the pressure contact cover 30. It is comprised. In this embodiment, for convenience of explanation, front and rear, left and right, and up and down directions are defined as shown in the figure.

  The housing 20 is made of an electrically insulating material such as resin, and has a base portion 21 extending in the left-right direction and a press-contact cover holding space 22 (see FIGS. 7 and 7) formed so as to penetrate the left and right end portions of the base portion 21 in the vertical direction. 8) and a plug portion 23 provided so as to protrude forward from the front surface of the base portion 21, and a plurality of (in this embodiment, ten) contacts 40 are provided on the plug portion 23, respectively. It extends in the front-rear direction and is arranged in parallel with the left-right direction.

  The contact 40 is made of a conductive material such as metal, and as shown in FIGS. 7 to 10, as shown in FIGS. 7 to 10, a contact portion 41 that is exposed on the upper surface side of the plug portion 23, and a front portion of the contact portion 41 Side) a bent portion 42 that extends in a downward direction from the end and extends through the plug portion 23 in the vertical direction, and a rear portion of the contact portion 41 (the side on which the plug portion 23 extends). And an intermediate portion 43 which is bent obliquely downward from the end portion and extends horizontally, and a terminal portion 44 which extends upward from the rear end of the intermediate portion 43. The terminal portion 44 is provided with a pressure contact groove 45 having a shape opening upward. Here, when the housing 20 is formed by molding, each contact 40 is inserted into a molding die (not shown) when the housing 20 is molded, and the housing 20 is simultaneously molded with the housing 20. It is preferable that it is the structure (insert molding) attached.

  One electric wire 50 is press-fitted and attached to the press-contact groove 45 of each contact 40, and one end portion thereof is located in the housing 10, and the other end portion extends rearward of the housing 10. In this embodiment, since the number of contacts 40 is ten, the number of electric wires 50 is ten. The electric wire 50 includes a core wire 51 made of a conductive material and an insulating coating 52 made of an electrically insulating material provided so as to cover the outer periphery of the core wire 51. The width of the pressure contact groove 45 of the contact 40 is slightly smaller than the diameter of the core wire 51, and when the electric wire 50 is pressed from above the contact 40 after the direction in which the electric wire 50 extends matches the direction in which the contact 40 extends (front-rear direction) ( The insulating coating 52 is torn by the pressure contact groove 45, and the exposed core wire 51 is in contact with the inner edge of the pressure contact groove 45 (see FIG. 10 (B)). The electric wire 50 and the contact 40 are electrically connected by such pressure contact of the electric wire 50.

  Further, a housing-side first electric wire holding groove 25 is provided at the rear position of the pressure contact groove 45 in the housing 20 so as to open upward, and the housing-side first electric wire holding groove 25 is provided at a position further rearward of the housing-side first electric wire holding groove 25. Two electric wire holding grooves 26 are also provided so as to open upward. The housing-side first electric wire holding groove 25 and the housing-side second electric wire holding groove 26 are provided to fix and hold the electric wire 50 press-contacted in the press-contacting groove 45 behind the contact 40. FIG. 11 shows a state in which ten electric wires 50 are pressed into the press contact groove 45 of the contact 40 and held in the housing side first holding groove 25 and the housing side second electric wire holding groove 26 provided in the housing 20. (The pressure contact cover 30 is not shown).

  The press-contact cover 30 is made of an electrically insulating material such as resin, and as shown in FIGS. 12 and 13, a base portion 31 extending in the left-right direction and side portions provided to extend downward from both left and right end portions of the base portion 31. 32. Each of the left and right side portions 32 is provided with a locking projection 33 that protrudes forward and extends (see FIG. 12), and when the pressure contact cover 30 is attached from above the housing 20, these left and right locking projections 33 are provided. Is inserted into a recess 22a (see FIGS. 2C and 7) provided in the housing 20 (on the wall surface forming the press-contact cover holding space 22), and the housing 20 and the press-contact cover 30 are coupled (temporarily coupled). ). 14 and 15 show a state immediately before the housing 20 and the pressure contact cover 30 are temporarily joined (the electric wire 50 is not shown).

  As shown in FIGS. 12 and 13, on the lower surface side of the base portion 31 of the press-contact cover 30, wire holding protrusions 34 are provided so as to protrude downward and extend side by side. A cover-side electric wire holding groove 35 opened downward is formed in a state extending in the front-rear direction and aligned in the left-right direction. The distance between adjacent wire holding protrusions 34, that is, the width of the cover-side wire holding groove 35 is slightly smaller than the diameter of the wire 50 (the diameter including the insulating coating 52). When the pressure contact cover 30 is pressed from above with the wire 40 placed on the pressure contact groove 45 of the contact 40, the electric wire 50 is compressed in the width direction (the width direction of the cover side electric wire holding groove 35) by the cover side electric wire holding groove 35. In the state, it is fixedly held in the cover-side electric wire holding groove 35. Further, a pressing protrusion 36 having a shape protruding downward is formed on the lower surface side of the base portion 31 and behind the cover-side electric wire holding groove 35 (see FIGS. 4 and 12). In a state where the electric wire 50 is press-fitted into the groove 35, the electric wire 50 is positioned directly below the pressing protrusion 36 and presses the electric wire 50 downward (to the housing 20 side) (see FIG. 4).

  Further, as shown in FIGS. 3, 6, and 12, a plurality of (five in this case) press-fitting protrusions 37 projecting downward are provided on the lower surface side of the intermediate portion in the width direction of the base 31 of the press-contact cover 30. A plurality (four in this case) of space holding protrusions 38 projecting downward from between adjacent press-fitting protrusions 37 are provided. On the other hand, as shown in FIGS. 2C, 3, 5, 8, and 15, a plurality (in this case) formed in the intermediate portion in the width direction of the base portion 21 of the housing 20 in the vertical direction. 5) press-fit holes 28 are provided, and when the press-contact cover 30 is coupled to the housing 20, the press-fit protrusions 37 provided on the press-contact cover 30 are inserted from above and press-fit. . At this time, the space holding projection 38 provided on the pressure contact cover 30 has its lower end abutted against the base upper surface 21a of the housing 20 (see FIGS. 8 and 3). A space enough to hold the electric wire 50 without being crushed is secured between the base upper surface 21a. The plurality of press-fitting protrusions 37 are all arranged so as to extend in the vertical direction between the adjacent electric wires 50 in a state where the press-contact cover 30 is attached to the housing 20.

In order to manufacture (assemble) the plug-type connector 1, first, as shown in FIG. 16A, all the ten electric wires 50 are placed on the pressure contact groove 45 in a parallel state. At this time, the electric wires 50 are held in parallel by a jig 100 prepared as a separate member from the plug-type connector 10. When the electric wire 50 is placed on the pressure contact groove 45 in this way, the pressure contact cover 30 is attached to the housing 20 from above. In this case, left and right side portions 32 of the pressing cover 30 so as to enter from above into the press cover holding space 22 of the left and right housing 20, housing a locking projection 33 provided on the left and right side portions 32 of the pressure cover 30 20 It is made to fit in the hollow 22a provided in the right-and-left side part. As a result, the pressure contact cover 30 is temporarily joined to the housing 20 (see FIG. 16B). At this time, the plurality of press-fitting protrusions 37 provided on the press-contact cover 30 enter the press-fitting holes 28 formed in the housing 20 from above.

When the temporary connection of the pressure contact cover 30 to the housing 20 is completed, the pressure contact cover 30 is pushed from above the housing 20. As a result, the plurality of press-fitting projections 37 provided on the press-contact cover 30 are press-fitted into press-fit holes 28 formed in the housing 20 (see FIGS. 2, 3, 5, and 6). And the electric wires 50 are pressure-contacted by the insulation coating 52 being cut by the pressure-contact grooves 45 (see FIG. 16C). Further, at this time, each electric wire 50 is pressed by the pressure contact cover 30 (specifically, by the pressing protrusion 36) and is provided with two housing side electric wire holding grooves (housing side first electric wire holding groove 25 and housing side) provided in the housing 20. It is press-fitted into the second electric wire holding groove 26). Moreover, each electric wire 50 enters into the corresponding cover side electric wire holding groove 35, and the edge part is aligned.

  Further, the electric wire 50 is held by a jig (not shown) when the pressure contact cover 30 and the housing 20 are coupled to each other, and appropriate tension is applied. A portion further rearward than the portion held in the one electric wire holding groove 25 is press-fitted into the housing-side second electric wire holding groove 26. Unlike the housing-side first electric wire holding groove 25, the housing-side second electric wire holding groove 26 is not opposed to the press-contact cover 30 in the vertical direction (the press-contact cover 30 is not located above). Is required to be prevented from falling off from the groove 26 (upward movement), and for this reason, the inner edge of the groove 26 is provided with an uneven portion 26a into which the insulating coating 52 of the electric wire 50 bites by the press fitting of the electric wire 50. . The electric wire 50 press-fitted into the housing-side second electric wire holding groove 26 is deformed so as to follow the shape of the uneven portion 26a formed at the inner edge of the groove 26 as shown in FIG. Movement to is regulated.

  Thus, in the present plug-type connector 10, when the press contact cover 30 is coupled to the housing 20, the electric wire 50 is pressed by the press contact cover 30 and pressed into the press contact groove 45 formed in the terminal portion 44 of the contact 40. However, when the press-contact cover 30 is coupled to the housing 20, press-fit projections 37 extending downward from the intermediate portion in the width direction of the press-contact cover 30 are press-fitted in the intermediate portion in the width direction of the housing 20. It is press-fitted into the hole 28. Therefore, the intermediate portion in the width direction of the press contact cover 30 after being joined to the housing 20 does not lift from the intermediate portion in the width direction of the housing 20, and the press contact is made in the press contact groove 45 formed in the terminal portion 44 of the contact 40. Since the connected electric wire 50 can be firmly held (clamped) between the housing 20 and the pressure contact cover 30, the electric wire 50 is a very thin type or used for a movable part such as a hinge. Even if it falls, the drop of the electric wire 50 from the contact 40 can be reliably prevented. Furthermore, since the press-fitting protrusion 37 and the press-fitting hole 28 are provided in the housing 20 and the press-contact cover 30 that are relatively easy to mold, the manufacturing process can be simplified and the cost can be reduced.

  Further, in the present plug-type connector 10, the electric wire 50 is placed on the pressure contact groove 45 in advance before the pressure contact cover 30 and the housing 20 are combined, and when the pressure contact cover 30 and the housing 20 are combined, Since the step of pressing the electric wire 50 with the cover 30 and press-fitting it into the housing-side electric wire holding groove (the housing-side first electric wire holding groove 25 and the housing-side second electric wire holding groove 26) is performed, a single pressing step (pressure contact cover) All the press-fitting can be completed in the step of pushing 30 into the housing 20). For this reason, the manufacturing process can be simplified, and the manufacturing cost can be further reduced.

  In the plug-type connector 10, the cover-side electric wire holding groove 35 and the housing-side first electric wire holding groove 25 are positioned to face each other with the pressure-contact groove 45 of the contact 40 interposed therebetween. The electric wire 50 can be uniformly pressed downward on both sides of the press contact groove 45, and not only can the press contact of the electric wire 50 be performed easily and reliably, but also the electric wire 50 is held on both sides of the press contact groove 45 after the press contact. Therefore, the holding strength of the electric wire 50 can be further increased.

  Moreover, in this plug type connector 10, since the uneven part 26a which the insulation coating 52 of the electric wire 50 bites into is provided in the inner edge of the housing side 2nd electric wire holding groove 26, the insulation coating 52 of the electric wire 50 hold | maintained here is provided. Is deformed according to the shape of the concavo-convex portion 26a. This deformation is caused by the insulating coating 52 held in the housing-side first electric wire holding groove 25 and the insulating coating 52 held in the housing-side second electric wire holding groove 26. Since the twist of the shape is generated between the two, the movement (disconnection) of the electric wire 50 in the longitudinal direction is restricted, and the electric wire 50 is fixed and held more firmly.

  The preferred embodiments of the present invention have been described so far, but the scope of the present invention is not limited to those shown in the above-described embodiments. For example, in the above-described embodiment, there are ten contacts 40 and the number of electric wires 50 corresponding thereto is ten. However, the numbers of the contacts 40 and the electric wires 50 are not particularly limited and are arbitrary. In the above-described embodiment, when the press contact cover 30 is attached to the housing 20, each electric wire 50 is placed on the press contact groove 45 of the corresponding contact 40. Before attaching to the housing 20, each electric wire 50 may be press-fitted into the cover-side electric wire holding groove 35 formed in the press-contacting cover 30.

  In the above-described embodiment, the press-fitting protrusion is provided in the press-contact cover and the press-fitting hole is provided in the housing. However, these may be reversed. That is, of the housing and the pressure contact cover, the press-fitting protrusion provided to extend from the intermediate portion in the width direction of the member on one side is press-fitted into the press-fitting hole provided in the intermediate portion in the width direction of the member on the other side. Just do it. Moreover, in the above-mentioned embodiment, although the application object of the electric wire pressure-contact type connector which concerns on this invention was a plug-type connector, it is also applicable to a receptacle-type connector similarly.

It is a perspective view of a plug type connector constituted as one embodiment of an electric wire pressure welding connector concerning the present invention. (A) is a plan view of the plug-type connector, (B) is a front view, and (C) is a back view. It is sectional drawing of the said plug type connector seen from arrow III-III in FIG. 2 (A). It is sectional drawing of the said plug type connector seen from arrow IV-IV in FIG. 2 (A). It is sectional drawing of the said plug type connector seen from arrow VV in FIG. 2 (A). It is a perspective sectional view of the above-mentioned plug type connector seen from arrow VV in Drawing 2 (A). It is a perspective view of the housing which comprises the said plug type connector. It is a top view of the said plug type connector. It is a perspective view which shows a contact single-piece | unit with the electric wire crimped | contacted to this. It is the figure seen from the arrow X in FIG. 9 explaining the process of pressing an electric wire in the press-contact groove of a contact. (A) shows a state before the electric wire is pressed into the press contact groove, and (B) shows a state where the electric wire is pressed into the press contact groove. It is a perspective view which shows the state hold | maintained at the two electric wire holding grooves provided in the housing while ten electric wires are press-contacted to the press-contact groove of a contact. It is the perspective view which looked at the press-contact cover single-piece | unit from the downward diagonal. It is the perspective view which looked at the press-contact cover single-piece | unit from the downward diagonal. It is a perspective view which shows the state just before a housing and a press-contact cover are temporarily joined (an electric wire is not shown). It is a perspective view which shows the state just before a housing and a press-contact cover are temporarily joined (an electric wire is not shown). It is a figure which shows the assembly process of a plug type connector in order of (A)-> (B)-> (C).

Explanation of symbols

10 Plug type connector (wire pressure welding type connector)
20 Housing 28 Press-fit hole 30 Press-fit cover 37 Press-fit projection 40 Contact 44 Terminal section 45 Press-fit groove 50 Electric wire

Claims (2)

A housing made of an electrically insulating material, a plurality of contacts made of an electrically conductive material provided side by side in the width direction of the housing, a press-contact cover made of an electrically insulating material coupled to the housing, and each of the contacts A plurality of electric wires connected to a terminal portion and arranged in the width direction of the housing in a state of being sandwiched between the housing and the pressure contact cover, and the pressure contact cover is coupled to the housing In the wire pressure contact type connector of the configuration in which each electric wire pressed by the pressure contact cover is pressed into a pressure contact groove formed in the terminal portion of the contact,
When the press-contact cover is coupled to the housing, a plurality of press-fit projections extending from the width-direction intermediate portion of the one-side member of the housing and the press-contact cover are provided in the width-direction intermediate portion of the other-side member. Configured to be press-fitted into a plurality of press-fitting holes provided in the
Further, the one member has a space holding projection at a substantially central portion of a region sandwiched between two of the plurality of press fitting projections, and a recess is formed by the space holding projection and the press fitting projection. And
The space holding projection is in contact with the other member to form a space portion by closing the open end side of the recess,
The electric wire pressure contact type connector, wherein the electric wire is configured to be held in the space portion and extend into the pressure contact groove. Wherein the rear of the one member, further comprising wherein a pressing protrusion projecting toward the wire side, and is configured to the wire so as to press with the press protrusion from the bottom surface of the recess The wire pressure welding connector according to claim 1.

Images