JP4446477B2 - connector - Google Patents

Description

  The present invention relates to a connector.

Generally, a connector includes both male and female housings that can be fitted to each other, and both housings contain terminal fittings fixed to the ends of electric wires. Among these, the female terminal fitting accommodated in the cavity of the female housing disclosed in Patent Document 1 is disposed in the box-shaped connecting portion into which the male terminal fitting can be inserted and the rear thereof, and is caulked to the terminal covering of the electric wire The two housings are normally fitted to each other, so that electrical connection with the male terminal fitting is made in the connecting portion. Here, when the female terminal fitting is accommodated in the cavity, the main body portion is closely fitted in the cavity, but the barrel portion and the end of the electric wire are loosely fitted in the cavity.
JP-A-9-153386

  In the above case, since the barrel part and the end of the electric wire are accommodated with a clearance between the inner wall of the cavity, if the electric wire swings in the direction perpendicular to the axis after both housings are properly fitted, the barrel part is There was a worrisome concern. If it does so, the contact area | region of both male and female terminal metal fittings will be worn, and there existed a situation that it was difficult to ensure connection reliability.

  The present invention has been completed based on the above circumstances, and an object thereof is to prevent the terminal fitting from rattling in the cavity.

As means for achieving the above object, the invention of claim 1, the connector housing is capable of accommodating cavities terminal fittings are formed, the terminal fitting, the substrate and the substrate coated electric wires that are placed A pair of caulking pieces that protrude from both side edges of the electric wire and are caulked to the covering of the electric wire, and the pair of caulking pieces alternate along the outer circumferential surface of the electric wire covering in the axial direction of the electric wire. The board is arranged between the pair of caulking pieces in the front-rear direction and is formed with a wire push-up portion protruding toward the covering of the electric wire. , the surface opposite to the wire pushing-up portion abutting the pressed surface, wherein are gap filling part in accordance with the push of the wire push-up portion is formed by bulging, the is in the coating of the wire The protruding end portions of the pair of caulking pieces are caulked and fixed before and after sandwiching the padding portions, and the padding portions are more than the outer peripheral surfaces of the pair of caulking pieces positioned before and after the padding portions. The protruding portion is formed, and when the terminal fitting is accommodated in the cavity, the backpacking portion elastically contacts the inner wall of the cavity and presses the inner wall of the cavity together with the substrate. Have

<Invention of Claim 1>
The terminal metal plate is formed with a wire push-up portion protruding toward the wire covering, and the wire covering is formed with a bulging portion as the wire push-up portion is pushed up. When the terminal fitting is inserted into the cavity, the padding portion is configured to elastically contact the inner wall of the cavity and press the inner wall of the cavity together with the substrate, so that the connector housing is properly fitted with the mating connector housing. After that, even if the electric wire is swung in the direction perpendicular to the axis, the electric wire and the terminal fitting connected to the electric wire are not rattled in the cavity, thereby improving the connection reliability of the terminal fitting. Further, since the backpacking portion elastically contacts the inner wall of the cavity, the inner wall of the cavity is not damaged.

In addition, a pair of caulking pieces are arranged in a staggered manner before and after the electric wire in the axial direction while being along the outer peripheral surface of the electric wire covering, and both the caulking pieces protrude before and after sandwiching the plugging portion in the electric wire covering. Since the end portion is fixed by caulking, when the terminal fitting is accommodated in the cavity, it is possible to avoid a situation where the ratchet portion is crushed between the inner wall of the cavity, and therefore, The elasticity can be maintained.

  An embodiment of the present invention will be described with reference to FIGS. The connector according to the present invention exemplifies a female connector F that can be fitted with a male connector M, and includes a female housing 10 in which a cavity 11 that can accommodate a female terminal fitting 30 is formed. In the following description, in the front-rear direction, the fitting surface side with respect to the male connector M is the front.

  First, a description will be given of the mating male housing 50. As shown in FIG. 2, the male housing 50 includes a rectangular tube-shaped fitting tube portion 51 that opens forward, and a rear wall of the fitting tube portion 51. A plurality of male terminal fittings 70 are fixed to 52 by press-fitting. The male terminal fittings 70 are arranged in a plurality of rows in the width direction in two upper and lower stages. Each male terminal fitting 70 penetrates the back wall 52 of the fitting cylinder part 51 back and forth and protrudes substantially horizontally inside the fitting cylinder part 51 from the rear end of the terminal connection part 71. After being folded downward, the board connecting portion 72 protrudes substantially horizontally from the lower end to the rear. The terminal connection portion 71 is connected to the female terminal fitting 30, while the board connection portion 72 is connected to a conductive path of a printed board (not shown). The front end of the terminal connecting portion 71 is disposed at a position deeper rearward from the front end of the fitting cylinder portion 51, and the terminal fittings 30 and 70 are connected at a position near the inner wall 52 of the fitting cylinder portion 51. Further, a relief 53 for avoiding interference with a bulging portion 12 of the female housing 10 to be described later is formed in the lower wall of the fitting cylinder portion 51 so as to open at the front end.

  Next, the female housing 10 will be described. As shown in FIG. 1, the female housing 10 is formed in a block shape having a size that can be fitted into the fitting cylinder portion 51, and a plurality of rows of cavities 11 are arranged in the front and rear in two steps in the width direction. It is formed through. On the front wall 13 of the cavity 11, a terminal insertion port 13 </ b> A into which the terminal connection portion 71 of the male terminal fitting 70 is inserted is formed in a trumpet shape. A lance 14 that extends in a cantilevered manner toward the front is formed on the inner wall of the cavity 11 so as to be deflectable. The lance 14 is elastically deformable in the vertical direction with a base end portion located substantially at the center in the front-rear direction of the cubity 11 as a fulcrum, and a locking receiving portion 31 (described later) of the female terminal fitting 30 is provided at the distal end portion thereof. An engaging projection 15 that can be engaged is provided.

  Further, the retainer 40 can be assembled to the female housing 10. The retainer 40 is a so-called side type retainer, and is inserted across the cavity 11 from a retainer mounting hole 16 opened on the lower surface of the female housing 10. The retainer 40 is movable between a temporary locking position inserted shallowly into the retainer mounting hole 16 and a final locking position inserted deeply into the retainer mounting hole 16, and the female terminal fitting 30 is provided at the temporary locking position. The female terminal fitting 30 that is normally inserted into the cavity 11 at the final locking position is held in a retaining state. The retainer 40 is formed in a substantially L-shaped cross section by a bottom plate 41 and a standing plate 42, and a locking portion 43 that can be engaged with the female terminal fitting 30 is formed on the standing plate 42 at the main locking position. Has been. Therefore, the female terminal fitting 30 is securely retained in the cavity 11 by receiving double locking by the lance 14 and the retainer 40. The lance 14 formed on the lower surface of the inner wall of the lower cavity 11 is disposed at a position facing the retainer mounting hole 16. When the retainer 40 is in the temporary locking position, a bending space is formed between the lance 14 and the bottom plate 41. On the other hand, when the retainer 40 is in the fully locked position, the elastic deformation downward is restricted by the bottom plate 41 and is restricted.

  In addition, a step 17 is formed on the inner wall of the cavity 11 at a position closer to the rear end than the central portion in the front-rear direction. The lower surface of the female housing 10 is formed substantially along the lower surface of the inner wall of the lower cavity 11, and is configured by providing a bulging portion 12 in the latter half of the portion corresponding to the step 17. Accordingly, since the female housing 10 can be set to have a smaller size in the front half than the bulging portion 12, the size of the mating cylinder portion 51 on the mating side can also be set to be small, and the height of the connector as a whole can be reduced accordingly. It can be kept low. In addition, when the housings 10 and 50 are properly fitted, a part of the bulging portion 12 enters the relief 53 of the fitting tube portion 51, so that the longitudinal length of the entire connector can be kept small. A finger hooking portion 18 protrudes downward from the rear end edge of the bulging portion 12 so that the housing 10 and 50 can be easily fitted and detached by pinching this. It has become.

  Next, the female terminal fitting 30 will be described. The female terminal fitting 30 is formed by punching a conductive metal plate into a predetermined shape and then bending it, and has a shape elongated in the front-rear direction. Specifically, the female terminal fitting 30 includes a main body portion 32 having a rectangular tube shape for realizing contact with the mating male terminal fitting 70, and by caulking a barrel 33 provided behind the main body portion 32. The wire 90 is fixed to the end of the wire 90. As shown in FIG. 3, the main body portion 32 is formed with an elastic contact piece 32A that elastically contacts the terminal connection portion 71 of the male terminal fitting 70. The elastic contact piece 32A has a rear end portion as a support end. It is formed to extend forward in a cantilevered manner. A window hole 32B that allows the lance 14 to enter is opened on the surface of the main body 32 opposite to the surface on which the elastic contact piece 32A is formed, and the front edge of the window hole 32B is the locking receiving portion 31. It has become. When the female terminal fitting 30 is pushed into the cavity 11 while bending and deforming the lance 14 from the rear and is properly inserted, the lance 14 is restored and its locking projection 15 enters the window hole 32B. The stopper 31 is elastically locked.

  The barrel 33 includes a wire barrel 34 that is caulked to the core wire 92 that is exposed by peeling the end cover 91 of the electric wire 90, and an insulation barrel 35 that is connected to the end of the end cover 91 of the electric wire 90. . As shown in FIG. 4, each of the wire barrel 34 and the insulation barrel 35 includes a long plate-like substrate 36 extending in the front-rear direction and a pair of caulking pieces 37A, 37B protruding in the direction perpendicular to the axis from both side edges. In addition, after the terminal coating 91 of the electric wire 90 is placed on the substrate 36, both the crimping pieces 37A and 37B are wound along the outer peripheral surfaces of the core wire 92 and the terminal coating 91 of the electric wire 90.

  The two caulking pieces 37A of the wire barrel 34 are arranged at positions facing each other with the substrate 36 interposed therebetween, while the two caulking pieces 37B of the insulation barrel 35 are arranged in the front-rear direction (the axial direction of the electric wire 90) on both side edges of the substrate 36. (Alternatively, it is synonymous with the extending direction of the electric wire 90) and is arranged in a staggered manner with a space therebetween. In the state where the two caulking pieces 37B of the insulation barrel 35 are wound around the electric wire 90, the protruding end portions of the both caulking pieces 37B overlap each other when viewed from the front-rear direction.

  Now, on the substrate 36 of the female terminal fitting 30, an electric wire push-up portion 39 protruding toward the terminal covering 91 of the electric wire 90 is formed by knocking out. As shown in FIGS. 1 and 4, the wire push-up portion 39 has a rectangular shape when viewed from the top and a bottom shape when trapped when viewed from the side, and its protruding end surface is a flat surface along the front-rear direction. ing. The electric wire push-up portion 39 is disposed between a pair of front and rear caulking pieces 37 </ b> B in the insulation barrel 35.

  Further, the electric wire 90 is formed with a height dimension larger than that of the main body 32 of the female terminal fitting 30, and is a thick electric wire corresponding to a large current circuit. The electric wire 90 is placed on the substrate 36 from between the barrels 33 opened in an oven barrel shape, and is fixed by caulking pieces 37A and 37B of the wire barrel 34 and the insulation barrel 35 in this state. In this case, the end cover 91 of the electric wire 90 corresponding to the insulation barrel 35 is formed with a pressed surface 91A that is elastically depressed by contact with the electric wire push-up portion 39, and the pressed surface 91A A filling portion 95 is formed on a plane symmetrical with respect to the axis so as to bulge upon receiving the push-out by the electric wire push-up portion 39.

  The gap filling portion 95 protrudes from the surrounding surface by the thickness of the covering 91 and is disposed between the protruding end portions of the pair of front and rear caulking pieces 37B. The front and rear positions are partitioned by the caulking pieces 37B. It is supposed to be. In other words, the protruding end portions of the both caulking pieces 37B are fixed by caulking before and after the padding portion 95 in the terminal covering 91 of the electric wire 90, so that the padding portion 95 does not lose its shape. The initial elastic force can be maintained. The shape of the padding portion 95 is a shape corresponding to the wire push-up portion 39, and when it is accommodated in the cavity 11, it elastically contacts the inner wall of the cavity 11 and its tip portion is slightly compressed. Yes.

  Next, the operation of this embodiment will be described. First, the male housing 50 is fixed on a printed circuit board (not shown) to enter a standby state. Subsequently, as shown in FIG. 1, the retainer 40 is retained at the temporary locking position, and the female terminal fitting 30 is inserted from the rear into the cavity 11 of the female housing 10 in this state. At this time, the female terminal fitting 30 is pushed in such a manner that the substrate 36 of the female terminal fitting 30 is along the upper surface of the inner wall of the cavity 11. When the female terminal fitting 30 is properly inserted, the female terminal fitting 30 is primarily locked in the cavity 11 based on the engagement between the locking projection 15 of the lance 14 and the locking receiving portion 31. When the retainer 40 is pushed into the final locking position from this state, the female terminal fitting 30 is cavityd based on the engagement between the locking portion 43 of the retainer 40 and the jaw portion 32E of the female terminal fitting 30, as shown in FIG. 11 is secondary locked.

  When the female terminal fitting 30 is normally inserted into the cavity 11 in this way, the entire female terminal fitting 30 and a part of the end of the electric wire 90 exposed behind the female terminal fitting 30 are accommodated in the cavity 11. Then, the padding portion 95 elastically contacts the lower surface of the inner wall of the cavity 11, and the substrate 36 comes into contact with the upper surface of the cavity 11 except for the electric wire push-up portion 39. The loose packing portion 95 and the substrate 36 press the inner wall of the cavity 11 in the vertical direction, so that the loose movement of the female terminal fitting 30 in the cavity 11 is reliably restricted.

  Thereafter, the female housing 10 is fitted into the fitting cylinder portion 51 of the male housing 50 in a standby state. As shown in FIG. 3, when the female housing 10 is pushed into the fitting cylinder portion 51 until the front end of the female housing 10 stops against the front surface of the inner wall 52 of the fitting cylinder portion 51, the terminal connection portion of the male terminal fitting 70 is obtained. 71 enters the main body 32 of the female terminal fitting 30 through the terminal insertion port 13A and is electrically connected to the elastic contact piece 32A.

  As described above, according to the present embodiment, the wire push-up portion 39 protruding toward the terminal coating 91 of the electric wire 90 is formed on the substrate 36 of the female terminal fitting 30, and the electric wire push-up is formed on the terminal coating 91 of the electric wire 90. A filling portion 95 is formed which bulges as the portion 39 is pushed up. When the female terminal fitting 30 is inserted into the cavity 11 of the female housing 10, the filling portion 95 is formed on the inner wall of the cavity 11. Since the inner wall of the cavity 11 is pressed together with the substrate 36 by elastic contact, even if the electric wire 90 swings in the direction perpendicular to the axis after the female housing 10 is properly fitted to the male housing 50, the female terminal fitting 30. Is not rattled in the cavity 11, and the connection reliability of the male and female terminal fittings 30, 70 can be improved. Further, since the padding portion 95 is in elastic contact with the inner wall of the cavity 11, damage to the inner wall of the cavity 11 can be prevented.

  The two caulking pieces 37B of the insulation barrel 35 are arranged in a staggered manner along the outer peripheral surface of the terminal covering 91 of the electric wire 90, and before and after sandwiching the backpack 95 in the terminal covering 91 of the electric wire 90. Since the protruding end portions of the both caulking pieces 37B are caulked and fixed, when the female terminal fitting 30 is accommodated in the cavity 11, it is possible to avoid a situation where the rattling portion 95 is crushed between the inner wall of the cavity 11 Thus, the resilience of the backfill portion 95 against the inner wall of the cavity 11 can be maintained.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In this invention, it can apply also to the connector which connects wire harnesses. In that case, a wire push-up portion may be formed on the male terminal fitting side, and a padding portion may be formed on the electric wire connected to the male terminal fitting.
(2) In this invention, the protrusion amount and shape of an electric wire pushing-up part can be arbitrarily set in the range in which the backpacking part can exhibit the backpacking function.
(3) In this invention, it can apply also to a wire diameter smaller than the height dimension of the main-body part of a female terminal metal fitting.

  The sectional side view of the female housing before inserting a female terminal metal fitting in the connector concerning one embodiment of the present invention.   Side sectional view of female housing before mating with male housing   Side sectional view of female housing mated with male housing   Top view of female terminal fitting

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Female housing 11 ... Cavity 30 ... Female terminal metal fitting (terminal metal fitting)
32 ... Main body 36 ... Substrate 39 ... Electric wire push-up part 50 ... Male housing 51 ... Fitting cylinder part 90 ... Electric wire 95 ... Gadging part

Claims (1)

The connector housing is that capable of accommodating cavities terminal fittings formed, the terminal fitting, a pair of crimping pieces to be crimped to the coating of the electric wire protrudes a substrate coating that is placed in the wire from the opposite side edges of the substrate And
The pair of caulking pieces are arranged alternately in front and rear in the axial direction of the electric wire while being along the outer peripheral surface of the covering of the electric wire,
The board is disposed between the pair of caulking pieces in the front-rear direction and has a wire push-up portion protruding toward the wire covering, and the wire covering abuts the wire push-up portion. On the surface opposite to the pressed surface, a stuffed portion is formed to bulge as the wire push-up portion is pushed up,
The projecting ends of the pair of caulking pieces are caulked and fixed before and after sandwiching the gap filling portion in the covering of the electric wire,
The stuffing portion is formed so as to protrude from the outer peripheral surfaces of the pair of caulking pieces located before and after the stuffing portion,
The connector is characterized in that when the terminal fitting is accommodated in the cavity, the padding portion elastically contacts the inner wall of the cavity and presses the inner wall of the cavity together with the substrate.

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